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31e31b8a 1/* This is the Linux kernel elf-loading code, ported into user space */
d39594e9 2#include "qemu/osdep.h"
edf8e2af 3#include <sys/param.h>
31e31b8a 4
edf8e2af 5#include <sys/resource.h>
30ab9ef2 6#include <sys/shm.h>
31e31b8a 7
3ef693a0 8#include "qemu.h"
3b249d26 9#include "user-internals.h"
db2af69d 10#include "signal-common.h"
3ad0a769 11#include "loader.h"
5423e6d3 12#include "user-mmap.h"
76cad711 13#include "disas/disas.h"
ce543844 14#include "qemu/bitops.h"
f348b6d1 15#include "qemu/path.h"
dc5e9ac7 16#include "qemu/queue.h"
c6a2377f 17#include "qemu/guest-random.h"
6fd59449 18#include "qemu/units.h"
ee947430 19#include "qemu/selfmap.h"
c7f17e7b 20#include "qapi/error.h"
db2af69d 21#include "target_signal.h"
31e31b8a 22
e58ffeb3 23#ifdef _ARCH_PPC64
a6cc84f4 24#undef ARCH_DLINFO
25#undef ELF_PLATFORM
26#undef ELF_HWCAP
ad6919dc 27#undef ELF_HWCAP2
a6cc84f4 28#undef ELF_CLASS
29#undef ELF_DATA
30#undef ELF_ARCH
31#endif
32
edf8e2af
MW		 33#define ELF_OSABI ELFOSABI_SYSV
34
cb33da57
BS		 35/* from personality.h */
36
37/*
38 * Flags for bug emulation.
39 *
40 * These occupy the top three bytes.
41 */
42enum {
d97ef72e
RH		 43 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
44 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to
45 descriptors (signal handling) */
46 MMAP_PAGE_ZERO = 0x0100000,
47 ADDR_COMPAT_LAYOUT = 0x0200000,
48 READ_IMPLIES_EXEC = 0x0400000,
49 ADDR_LIMIT_32BIT = 0x0800000,
50 SHORT_INODE = 0x1000000,
51 WHOLE_SECONDS = 0x2000000,
52 STICKY_TIMEOUTS = 0x4000000,
53 ADDR_LIMIT_3GB = 0x8000000,
cb33da57
BS		 54};
55
56/*
57 * Personality types.
58 *
59 * These go in the low byte. Avoid using the top bit, it will
60 * conflict with error returns.
61 */
62enum {
d97ef72e
RH		 63 PER_LINUX = 0x0000,
64 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
65 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
66 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
67 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
68 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,
69 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
70 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
71 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
72 PER_BSD = 0x0006,
73 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
74 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
75 PER_LINUX32 = 0x0008,
76 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
77 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
78 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
79 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
80 PER_RISCOS = 0x000c,
81 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
82 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
83 PER_OSF4 = 0x000f, /* OSF/1 v4 */
84 PER_HPUX = 0x0010,
85 PER_MASK = 0x00ff,
cb33da57
BS		 86};
87
88/*
89 * Return the base personality without flags.
90 */
d97ef72e 91#define personality(pers) (pers & PER_MASK)
cb33da57 92
3cb10cfa
CL		 93int info_is_fdpic(struct image_info *info)
94{
95 return info->personality == PER_LINUX_FDPIC;
96}
97
83fb7adf
FB		 98/* this flag is uneffective under linux too, should be deleted */
99#ifndef MAP_DENYWRITE
100#define MAP_DENYWRITE 0
101#endif
102
103/* should probably go in elf.h */
104#ifndef ELIBBAD
105#define ELIBBAD 80
106#endif
107
ee3eb3a7 108#if TARGET_BIG_ENDIAN
28490231
RH		 109#define ELF_DATA ELFDATA2MSB
110#else
111#define ELF_DATA ELFDATA2LSB
112#endif
113
a29f998d 114#ifdef TARGET_ABI_MIPSN32
918fc54c
PB		 115typedef abi_ullong target_elf_greg_t;
116#define tswapreg(ptr) tswap64(ptr)
a29f998d
PB		 117#else
118typedef abi_ulong target_elf_greg_t;
119#define tswapreg(ptr) tswapal(ptr)
120#endif
121
21e807fa 122#ifdef USE_UID16
1ddd592f
PB		 123typedef abi_ushort target_uid_t;
124typedef abi_ushort target_gid_t;
21e807fa 125#else
f8fd4fc4
PB		 126typedef abi_uint target_uid_t;
127typedef abi_uint target_gid_t;
21e807fa 128#endif
f8fd4fc4 129typedef abi_int target_pid_t;
21e807fa 130
30ac07d4
FB		 131#ifdef TARGET_I386
132
15338fd7
FB		 133#define ELF_PLATFORM get_elf_platform()
134
135static const char *get_elf_platform(void)
136{
137 static char elf_platform[] = "i386";
a2247f8e 138 int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
15338fd7
FB		 139 if (family > 6)
140 family = 6;
141 if (family >= 3)
142 elf_platform[1] = '0' + family;
143 return elf_platform;
144}
145
146#define ELF_HWCAP get_elf_hwcap()
147
148static uint32_t get_elf_hwcap(void)
149{
a2247f8e
AF		 150 X86CPU *cpu = X86_CPU(thread_cpu);
151
152 return cpu->env.features[FEAT_1_EDX];
15338fd7
FB		 153}
154
84409ddb
JM		 155#ifdef TARGET_X86_64
156#define ELF_START_MMAP 0x2aaaaab000ULL
84409ddb
JM		 157
158#define ELF_CLASS ELFCLASS64
84409ddb
JM		 159#define ELF_ARCH EM_X86_64
160
161static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
162{
163 regs->rax = 0;
164 regs->rsp = infop->start_stack;
165 regs->rip = infop->entry;
166}
167
9edc5d79 168#define ELF_NREG 27
c227f099 169typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 170
171/*
172 * Note that ELF_NREG should be 29 as there should be place for
173 * TRAPNO and ERR "registers" as well but linux doesn't dump
174 * those.
175 *
176 * See linux kernel: arch/x86/include/asm/elf.h
177 */
05390248 178static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
9edc5d79 179{
030912e0
IL		 180 (*regs)[0] = tswapreg(env->regs[15]);
181 (*regs)[1] = tswapreg(env->regs[14]);
182 (*regs)[2] = tswapreg(env->regs[13]);
183 (*regs)[3] = tswapreg(env->regs[12]);
184 (*regs)[4] = tswapreg(env->regs[R_EBP]);
185 (*regs)[5] = tswapreg(env->regs[R_EBX]);
186 (*regs)[6] = tswapreg(env->regs[11]);
187 (*regs)[7] = tswapreg(env->regs[10]);
188 (*regs)[8] = tswapreg(env->regs[9]);
189 (*regs)[9] = tswapreg(env->regs[8]);
190 (*regs)[10] = tswapreg(env->regs[R_EAX]);
191 (*regs)[11] = tswapreg(env->regs[R_ECX]);
192 (*regs)[12] = tswapreg(env->regs[R_EDX]);
193 (*regs)[13] = tswapreg(env->regs[R_ESI]);
194 (*regs)[14] = tswapreg(env->regs[R_EDI]);
195 (*regs)[15] = tswapreg(env->regs[R_EAX]); /* XXX */
196 (*regs)[16] = tswapreg(env->eip);
197 (*regs)[17] = tswapreg(env->segs[R_CS].selector & 0xffff);
198 (*regs)[18] = tswapreg(env->eflags);
199 (*regs)[19] = tswapreg(env->regs[R_ESP]);
200 (*regs)[20] = tswapreg(env->segs[R_SS].selector & 0xffff);
201 (*regs)[21] = tswapreg(env->segs[R_FS].selector & 0xffff);
202 (*regs)[22] = tswapreg(env->segs[R_GS].selector & 0xffff);
203 (*regs)[23] = tswapreg(env->segs[R_DS].selector & 0xffff);
204 (*regs)[24] = tswapreg(env->segs[R_ES].selector & 0xffff);
205 (*regs)[25] = tswapreg(env->segs[R_FS].selector & 0xffff);
206 (*regs)[26] = tswapreg(env->segs[R_GS].selector & 0xffff);
9edc5d79
MW		 207}
208
84409ddb
JM		 209#else
210
30ac07d4
FB		 211#define ELF_START_MMAP 0x80000000
212
30ac07d4
FB		 213/*
214 * This is used to ensure we don't load something for the wrong architecture.
215 */
216#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
217
218/*
219 * These are used to set parameters in the core dumps.
220 */
d97ef72e 221#define ELF_CLASS ELFCLASS32
d97ef72e 222#define ELF_ARCH EM_386
30ac07d4 223
d97ef72e
RH		 224static inline void init_thread(struct target_pt_regs *regs,
225 struct image_info *infop)
b346ff46
FB		 226{
227 regs->esp = infop->start_stack;
228 regs->eip = infop->entry;
e5fe0c52
PB		 229
230 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
231 starts %edx contains a pointer to a function which might be
232 registered using `atexit'. This provides a mean for the
233 dynamic linker to call DT_FINI functions for shared libraries
234 that have been loaded before the code runs.
235
236 A value of 0 tells we have no such handler. */
237 regs->edx = 0;
b346ff46 238}
9edc5d79 239
9edc5d79 240#define ELF_NREG 17
c227f099 241typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 242
243/*
244 * Note that ELF_NREG should be 19 as there should be place for
245 * TRAPNO and ERR "registers" as well but linux doesn't dump
246 * those.
247 *
248 * See linux kernel: arch/x86/include/asm/elf.h
249 */
05390248 250static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
9edc5d79 251{
030912e0
IL		 252 (*regs)[0] = tswapreg(env->regs[R_EBX]);
253 (*regs)[1] = tswapreg(env->regs[R_ECX]);
254 (*regs)[2] = tswapreg(env->regs[R_EDX]);
255 (*regs)[3] = tswapreg(env->regs[R_ESI]);
256 (*regs)[4] = tswapreg(env->regs[R_EDI]);
257 (*regs)[5] = tswapreg(env->regs[R_EBP]);
258 (*regs)[6] = tswapreg(env->regs[R_EAX]);
259 (*regs)[7] = tswapreg(env->segs[R_DS].selector & 0xffff);
260 (*regs)[8] = tswapreg(env->segs[R_ES].selector & 0xffff);
261 (*regs)[9] = tswapreg(env->segs[R_FS].selector & 0xffff);
262 (*regs)[10] = tswapreg(env->segs[R_GS].selector & 0xffff);
263 (*regs)[11] = tswapreg(env->regs[R_EAX]); /* XXX */
264 (*regs)[12] = tswapreg(env->eip);
265 (*regs)[13] = tswapreg(env->segs[R_CS].selector & 0xffff);
266 (*regs)[14] = tswapreg(env->eflags);
267 (*regs)[15] = tswapreg(env->regs[R_ESP]);
268 (*regs)[16] = tswapreg(env->segs[R_SS].selector & 0xffff);
9edc5d79 269}
84409ddb 270#endif
b346ff46 271
9edc5d79 272#define USE_ELF_CORE_DUMP
d97ef72e 273#define ELF_EXEC_PAGESIZE 4096
b346ff46
FB		 274
275#endif
276
277#ifdef TARGET_ARM
278
24e76ff0
PM		 279#ifndef TARGET_AARCH64
280/* 32 bit ARM definitions */
281
b346ff46
FB		 282#define ELF_START_MMAP 0x80000000
283
b597c3f7 284#define ELF_ARCH EM_ARM
d97ef72e 285#define ELF_CLASS ELFCLASS32
b346ff46 286
d97ef72e
RH		 287static inline void init_thread(struct target_pt_regs *regs,
288 struct image_info *infop)
b346ff46 289{
992f48a0 290 abi_long stack = infop->start_stack;
b346ff46 291 memset(regs, 0, sizeof(*regs));
99033cae 292
167e4cdc
PM		 293 regs->uregs[16] = ARM_CPU_MODE_USR;
294 if (infop->entry & 1) {
295 regs->uregs[16] |= CPSR_T;
296 }
297 regs->uregs[15] = infop->entry & 0xfffffffe;
298 regs->uregs[13] = infop->start_stack;
2f619698 299 /* FIXME - what to for failure of get_user()? */
167e4cdc
PM		 300 get_user_ual(regs->uregs[2], stack + 8); /* envp */
301 get_user_ual(regs->uregs[1], stack + 4); /* envp */
a1516e92 302 /* XXX: it seems that r0 is zeroed after ! */
167e4cdc 303 regs->uregs[0] = 0;
e5fe0c52 304 /* For uClinux PIC binaries. */
863cf0b7 305 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
167e4cdc 306 regs->uregs[10] = infop->start_data;
3cb10cfa
CL		 307
308 /* Support ARM FDPIC. */
309 if (info_is_fdpic(infop)) {
310 /* As described in the ABI document, r7 points to the loadmap info
311 * prepared by the kernel. If an interpreter is needed, r8 points
312 * to the interpreter loadmap and r9 points to the interpreter
313 * PT_DYNAMIC info. If no interpreter is needed, r8 is zero, and
314 * r9 points to the main program PT_DYNAMIC info.
315 */
316 regs->uregs[7] = infop->loadmap_addr;
317 if (infop->interpreter_loadmap_addr) {
318 /* Executable is dynamically loaded. */
319 regs->uregs[8] = infop->interpreter_loadmap_addr;
320 regs->uregs[9] = infop->interpreter_pt_dynamic_addr;
321 } else {
322 regs->uregs[8] = 0;
323 regs->uregs[9] = infop->pt_dynamic_addr;
324 }
325 }
b346ff46
FB		 326}
327
edf8e2af 328#define ELF_NREG 18
c227f099 329typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 330
05390248 331static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env)
edf8e2af 332{
86cd7b2d
PB		 333 (*regs)[0] = tswapreg(env->regs[0]);
334 (*regs)[1] = tswapreg(env->regs[1]);
335 (*regs)[2] = tswapreg(env->regs[2]);
336 (*regs)[3] = tswapreg(env->regs[3]);
337 (*regs)[4] = tswapreg(env->regs[4]);
338 (*regs)[5] = tswapreg(env->regs[5]);
339 (*regs)[6] = tswapreg(env->regs[6]);
340 (*regs)[7] = tswapreg(env->regs[7]);
341 (*regs)[8] = tswapreg(env->regs[8]);
342 (*regs)[9] = tswapreg(env->regs[9]);
343 (*regs)[10] = tswapreg(env->regs[10]);
344 (*regs)[11] = tswapreg(env->regs[11]);
345 (*regs)[12] = tswapreg(env->regs[12]);
346 (*regs)[13] = tswapreg(env->regs[13]);
347 (*regs)[14] = tswapreg(env->regs[14]);
348 (*regs)[15] = tswapreg(env->regs[15]);
349
350 (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env));
351 (*regs)[17] = tswapreg(env->regs[0]); /* XXX */
edf8e2af
MW		 352}
353
30ac07d4 354#define USE_ELF_CORE_DUMP
d97ef72e 355#define ELF_EXEC_PAGESIZE 4096
30ac07d4 356
afce2927
FB		 357enum
358{
d97ef72e
RH		 359 ARM_HWCAP_ARM_SWP = 1 << 0,
360 ARM_HWCAP_ARM_HALF = 1 << 1,
361 ARM_HWCAP_ARM_THUMB = 1 << 2,
362 ARM_HWCAP_ARM_26BIT = 1 << 3,
363 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
364 ARM_HWCAP_ARM_FPA = 1 << 5,
365 ARM_HWCAP_ARM_VFP = 1 << 6,
366 ARM_HWCAP_ARM_EDSP = 1 << 7,
367 ARM_HWCAP_ARM_JAVA = 1 << 8,
368 ARM_HWCAP_ARM_IWMMXT = 1 << 9,
43ce393e
PM		 369 ARM_HWCAP_ARM_CRUNCH = 1 << 10,
370 ARM_HWCAP_ARM_THUMBEE = 1 << 11,
371 ARM_HWCAP_ARM_NEON = 1 << 12,
372 ARM_HWCAP_ARM_VFPv3 = 1 << 13,
373 ARM_HWCAP_ARM_VFPv3D16 = 1 << 14,
24682654
PM		 374 ARM_HWCAP_ARM_TLS = 1 << 15,
375 ARM_HWCAP_ARM_VFPv4 = 1 << 16,
376 ARM_HWCAP_ARM_IDIVA = 1 << 17,
377 ARM_HWCAP_ARM_IDIVT = 1 << 18,
378 ARM_HWCAP_ARM_VFPD32 = 1 << 19,
379 ARM_HWCAP_ARM_LPAE = 1 << 20,
380 ARM_HWCAP_ARM_EVTSTRM = 1 << 21,
afce2927
FB		 381};
382
ad6919dc
PM		 383enum {
384 ARM_HWCAP2_ARM_AES = 1 << 0,
385 ARM_HWCAP2_ARM_PMULL = 1 << 1,
386 ARM_HWCAP2_ARM_SHA1 = 1 << 2,
387 ARM_HWCAP2_ARM_SHA2 = 1 << 3,
388 ARM_HWCAP2_ARM_CRC32 = 1 << 4,
389};
390
6b1275ff
PM		 391/* The commpage only exists for 32 bit kernels */
392
66346faf 393#define HI_COMMPAGE (intptr_t)0xffff0f00u
806d1021 394
ee947430
AB		 395static bool init_guest_commpage(void)
396{
66346faf 397 void *want = g2h_untagged(HI_COMMPAGE & -qemu_host_page_size);
ee947430 398 void *addr = mmap(want, qemu_host_page_size, PROT_READ | PROT_WRITE,
5c3e87f3 399 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
97cc7560 400
ee947430
AB		 401 if (addr == MAP_FAILED) {
402 perror("Allocating guest commpage");
403 exit(EXIT_FAILURE);
97cc7560 404 }
ee947430
AB		 405 if (addr != want) {
406 return false;
97cc7560
DDAG		 407 }
408
ee947430 409 /* Set kernel helper versions; rest of page is 0. */
3e8f1628 410 __put_user(5, (uint32_t *)g2h_untagged(0xffff0ffcu));
97cc7560 411
ee947430 412 if (mprotect(addr, qemu_host_page_size, PROT_READ)) {
97cc7560 413 perror("Protecting guest commpage");
ee947430 414 exit(EXIT_FAILURE);
97cc7560 415 }
ee947430 416 return true;
97cc7560 417}
adf050b1
BC		 418
419#define ELF_HWCAP get_elf_hwcap()
ad6919dc 420#define ELF_HWCAP2 get_elf_hwcap2()
adf050b1
BC		 421
422static uint32_t get_elf_hwcap(void)
423{
a2247f8e 424 ARMCPU *cpu = ARM_CPU(thread_cpu);
adf050b1
BC		 425 uint32_t hwcaps = 0;
426
427 hwcaps |= ARM_HWCAP_ARM_SWP;
428 hwcaps |= ARM_HWCAP_ARM_HALF;
429 hwcaps |= ARM_HWCAP_ARM_THUMB;
430 hwcaps |= ARM_HWCAP_ARM_FAST_MULT;
adf050b1
BC		 431
432 /* probe for the extra features */
433#define GET_FEATURE(feat, hwcap) \
a2247f8e 434 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
962fcbf2
RH		 435
436#define GET_FEATURE_ID(feat, hwcap) \
437 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
438
24682654
PM		 439 /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */
440 GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP);
adf050b1
BC		 441 GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
442 GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
443 GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
24682654 444 GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS);
bfa8a370 445 GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE);
873b73c0
PM		 446 GET_FEATURE_ID(aa32_arm_div, ARM_HWCAP_ARM_IDIVA);
447 GET_FEATURE_ID(aa32_thumb_div, ARM_HWCAP_ARM_IDIVT);
bfa8a370
RH		 448 GET_FEATURE_ID(aa32_vfp, ARM_HWCAP_ARM_VFP);
449
450 if (cpu_isar_feature(aa32_fpsp_v3, cpu) ||
451 cpu_isar_feature(aa32_fpdp_v3, cpu)) {
452 hwcaps |= ARM_HWCAP_ARM_VFPv3;
453 if (cpu_isar_feature(aa32_simd_r32, cpu)) {
454 hwcaps |= ARM_HWCAP_ARM_VFPD32;
455 } else {
456 hwcaps |= ARM_HWCAP_ARM_VFPv3D16;
457 }
458 }
459 GET_FEATURE_ID(aa32_simdfmac, ARM_HWCAP_ARM_VFPv4);
adf050b1
BC		 460
461 return hwcaps;
462}
afce2927 463
ad6919dc
PM		 464static uint32_t get_elf_hwcap2(void)
465{
466 ARMCPU *cpu = ARM_CPU(thread_cpu);
467 uint32_t hwcaps = 0;
468
962fcbf2
RH		 469 GET_FEATURE_ID(aa32_aes, ARM_HWCAP2_ARM_AES);
470 GET_FEATURE_ID(aa32_pmull, ARM_HWCAP2_ARM_PMULL);
471 GET_FEATURE_ID(aa32_sha1, ARM_HWCAP2_ARM_SHA1);
472 GET_FEATURE_ID(aa32_sha2, ARM_HWCAP2_ARM_SHA2);
473 GET_FEATURE_ID(aa32_crc32, ARM_HWCAP2_ARM_CRC32);
ad6919dc
PM		 474 return hwcaps;
475}
476
477#undef GET_FEATURE
962fcbf2 478#undef GET_FEATURE_ID
ad6919dc 479
13ec4ec3
RH		 480#define ELF_PLATFORM get_elf_platform()
481
482static const char *get_elf_platform(void)
483{
484 CPUARMState *env = thread_cpu->env_ptr;
485
ee3eb3a7 486#if TARGET_BIG_ENDIAN
13ec4ec3
RH		 487# define END "b"
488#else
489# define END "l"
490#endif
491
492 if (arm_feature(env, ARM_FEATURE_V8)) {
493 return "v8" END;
494 } else if (arm_feature(env, ARM_FEATURE_V7)) {
495 if (arm_feature(env, ARM_FEATURE_M)) {
496 return "v7m" END;
497 } else {
498 return "v7" END;
499 }
500 } else if (arm_feature(env, ARM_FEATURE_V6)) {
501 return "v6" END;
502 } else if (arm_feature(env, ARM_FEATURE_V5)) {
503 return "v5" END;
504 } else {
505 return "v4" END;
506 }
507
508#undef END
509}
510
24e76ff0
PM		 511#else
512/* 64 bit ARM definitions */
513#define ELF_START_MMAP 0x80000000
514
b597c3f7 515#define ELF_ARCH EM_AARCH64
24e76ff0 516#define ELF_CLASS ELFCLASS64
ee3eb3a7 517#if TARGET_BIG_ENDIAN
e20e3ec9
RH		 518# define ELF_PLATFORM "aarch64_be"
519#else
520# define ELF_PLATFORM "aarch64"
521#endif
24e76ff0
PM		 522
523static inline void init_thread(struct target_pt_regs *regs,
524 struct image_info *infop)
525{
526 abi_long stack = infop->start_stack;
527 memset(regs, 0, sizeof(*regs));
528
529 regs->pc = infop->entry & ~0x3ULL;
530 regs->sp = stack;
531}
532
533#define ELF_NREG 34
534typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
535
536static void elf_core_copy_regs(target_elf_gregset_t *regs,
537 const CPUARMState *env)
538{
539 int i;
540
541 for (i = 0; i < 32; i++) {
542 (*regs)[i] = tswapreg(env->xregs[i]);
543 }
544 (*regs)[32] = tswapreg(env->pc);
545 (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env));
546}
547
548#define USE_ELF_CORE_DUMP
549#define ELF_EXEC_PAGESIZE 4096
550
551enum {
552 ARM_HWCAP_A64_FP = 1 << 0,
553 ARM_HWCAP_A64_ASIMD = 1 << 1,
554 ARM_HWCAP_A64_EVTSTRM = 1 << 2,
555 ARM_HWCAP_A64_AES = 1 << 3,
556 ARM_HWCAP_A64_PMULL = 1 << 4,
557 ARM_HWCAP_A64_SHA1 = 1 << 5,
558 ARM_HWCAP_A64_SHA2 = 1 << 6,
559 ARM_HWCAP_A64_CRC32 = 1 << 7,
955f56d4
AB		 560 ARM_HWCAP_A64_ATOMICS = 1 << 8,
561 ARM_HWCAP_A64_FPHP = 1 << 9,
562 ARM_HWCAP_A64_ASIMDHP = 1 << 10,
563 ARM_HWCAP_A64_CPUID = 1 << 11,
564 ARM_HWCAP_A64_ASIMDRDM = 1 << 12,
565 ARM_HWCAP_A64_JSCVT = 1 << 13,
566 ARM_HWCAP_A64_FCMA = 1 << 14,
567 ARM_HWCAP_A64_LRCPC = 1 << 15,
568 ARM_HWCAP_A64_DCPOP = 1 << 16,
569 ARM_HWCAP_A64_SHA3 = 1 << 17,
570 ARM_HWCAP_A64_SM3 = 1 << 18,
571 ARM_HWCAP_A64_SM4 = 1 << 19,
572 ARM_HWCAP_A64_ASIMDDP = 1 << 20,
573 ARM_HWCAP_A64_SHA512 = 1 << 21,
574 ARM_HWCAP_A64_SVE = 1 << 22,
0083a1fa
RH		 575 ARM_HWCAP_A64_ASIMDFHM = 1 << 23,
576 ARM_HWCAP_A64_DIT = 1 << 24,
577 ARM_HWCAP_A64_USCAT = 1 << 25,
578 ARM_HWCAP_A64_ILRCPC = 1 << 26,
579 ARM_HWCAP_A64_FLAGM = 1 << 27,
580 ARM_HWCAP_A64_SSBS = 1 << 28,
581 ARM_HWCAP_A64_SB = 1 << 29,
582 ARM_HWCAP_A64_PACA = 1 << 30,
583 ARM_HWCAP_A64_PACG = 1UL << 31,
2041df4a
RH		 584
585 ARM_HWCAP2_A64_DCPODP = 1 << 0,
586 ARM_HWCAP2_A64_SVE2 = 1 << 1,
587 ARM_HWCAP2_A64_SVEAES = 1 << 2,
588 ARM_HWCAP2_A64_SVEPMULL = 1 << 3,
589 ARM_HWCAP2_A64_SVEBITPERM = 1 << 4,
590 ARM_HWCAP2_A64_SVESHA3 = 1 << 5,
591 ARM_HWCAP2_A64_SVESM4 = 1 << 6,
592 ARM_HWCAP2_A64_FLAGM2 = 1 << 7,
593 ARM_HWCAP2_A64_FRINT = 1 << 8,
68948d18
RH		 594 ARM_HWCAP2_A64_SVEI8MM = 1 << 9,
595 ARM_HWCAP2_A64_SVEF32MM = 1 << 10,
596 ARM_HWCAP2_A64_SVEF64MM = 1 << 11,
597 ARM_HWCAP2_A64_SVEBF16 = 1 << 12,
598 ARM_HWCAP2_A64_I8MM = 1 << 13,
599 ARM_HWCAP2_A64_BF16 = 1 << 14,
600 ARM_HWCAP2_A64_DGH = 1 << 15,
601 ARM_HWCAP2_A64_RNG = 1 << 16,
602 ARM_HWCAP2_A64_BTI = 1 << 17,
603 ARM_HWCAP2_A64_MTE = 1 << 18,
24e76ff0
PM		 604};
605
2041df4a
RH		 606#define ELF_HWCAP get_elf_hwcap()
607#define ELF_HWCAP2 get_elf_hwcap2()
608
609#define GET_FEATURE_ID(feat, hwcap) \
610 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
24e76ff0
PM		 611
612static uint32_t get_elf_hwcap(void)
613{
614 ARMCPU *cpu = ARM_CPU(thread_cpu);
615 uint32_t hwcaps = 0;
616
617 hwcaps |= ARM_HWCAP_A64_FP;
618 hwcaps |= ARM_HWCAP_A64_ASIMD;
37020ff1 619 hwcaps |= ARM_HWCAP_A64_CPUID;
24e76ff0
PM		 620
621 /* probe for the extra features */
962fcbf2
RH		 622
623 GET_FEATURE_ID(aa64_aes, ARM_HWCAP_A64_AES);
624 GET_FEATURE_ID(aa64_pmull, ARM_HWCAP_A64_PMULL);
625 GET_FEATURE_ID(aa64_sha1, ARM_HWCAP_A64_SHA1);
626 GET_FEATURE_ID(aa64_sha256, ARM_HWCAP_A64_SHA2);
627 GET_FEATURE_ID(aa64_sha512, ARM_HWCAP_A64_SHA512);
628 GET_FEATURE_ID(aa64_crc32, ARM_HWCAP_A64_CRC32);
629 GET_FEATURE_ID(aa64_sha3, ARM_HWCAP_A64_SHA3);
630 GET_FEATURE_ID(aa64_sm3, ARM_HWCAP_A64_SM3);
631 GET_FEATURE_ID(aa64_sm4, ARM_HWCAP_A64_SM4);
5763190f 632 GET_FEATURE_ID(aa64_fp16, ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP);
962fcbf2
RH		 633 GET_FEATURE_ID(aa64_atomics, ARM_HWCAP_A64_ATOMICS);
634 GET_FEATURE_ID(aa64_rdm, ARM_HWCAP_A64_ASIMDRDM);
635 GET_FEATURE_ID(aa64_dp, ARM_HWCAP_A64_ASIMDDP);
636 GET_FEATURE_ID(aa64_fcma, ARM_HWCAP_A64_FCMA);
cd208a1c 637 GET_FEATURE_ID(aa64_sve, ARM_HWCAP_A64_SVE);
29d26ab2 638 GET_FEATURE_ID(aa64_pauth, ARM_HWCAP_A64_PACA | ARM_HWCAP_A64_PACG);
1c9af3a9
RH		 639 GET_FEATURE_ID(aa64_fhm, ARM_HWCAP_A64_ASIMDFHM);
640 GET_FEATURE_ID(aa64_jscvt, ARM_HWCAP_A64_JSCVT);
9888bd1e 641 GET_FEATURE_ID(aa64_sb, ARM_HWCAP_A64_SB);
b89d9c98 642 GET_FEATURE_ID(aa64_condm_4, ARM_HWCAP_A64_FLAGM);
0d57b499 643 GET_FEATURE_ID(aa64_dcpop, ARM_HWCAP_A64_DCPOP);
2677cf9f 644 GET_FEATURE_ID(aa64_rcpc_8_3, ARM_HWCAP_A64_LRCPC);
a1229109 645 GET_FEATURE_ID(aa64_rcpc_8_4, ARM_HWCAP_A64_ILRCPC);
962fcbf2 646
2041df4a
RH		 647 return hwcaps;
648}
649
650static uint32_t get_elf_hwcap2(void)
651{
652 ARMCPU *cpu = ARM_CPU(thread_cpu);
653 uint32_t hwcaps = 0;
654
0d57b499 655 GET_FEATURE_ID(aa64_dcpodp, ARM_HWCAP2_A64_DCPODP);
cdc8d8b2
RH		 656 GET_FEATURE_ID(aa64_sve2, ARM_HWCAP2_A64_SVE2);
657 GET_FEATURE_ID(aa64_sve2_aes, ARM_HWCAP2_A64_SVEAES);
658 GET_FEATURE_ID(aa64_sve2_pmull128, ARM_HWCAP2_A64_SVEPMULL);
659 GET_FEATURE_ID(aa64_sve2_bitperm, ARM_HWCAP2_A64_SVEBITPERM);
660 GET_FEATURE_ID(aa64_sve2_sha3, ARM_HWCAP2_A64_SVESHA3);
661 GET_FEATURE_ID(aa64_sve2_sm4, ARM_HWCAP2_A64_SVESM4);
2041df4a
RH		 662 GET_FEATURE_ID(aa64_condm_5, ARM_HWCAP2_A64_FLAGM2);
663 GET_FEATURE_ID(aa64_frint, ARM_HWCAP2_A64_FRINT);
cdc8d8b2
RH		 664 GET_FEATURE_ID(aa64_sve_i8mm, ARM_HWCAP2_A64_SVEI8MM);
665 GET_FEATURE_ID(aa64_sve_f32mm, ARM_HWCAP2_A64_SVEF32MM);
666 GET_FEATURE_ID(aa64_sve_f64mm, ARM_HWCAP2_A64_SVEF64MM);
6c47a905 667 GET_FEATURE_ID(aa64_sve_bf16, ARM_HWCAP2_A64_SVEBF16);
cdc8d8b2 668 GET_FEATURE_ID(aa64_i8mm, ARM_HWCAP2_A64_I8MM);
6c47a905 669 GET_FEATURE_ID(aa64_bf16, ARM_HWCAP2_A64_BF16);
68948d18
RH		 670 GET_FEATURE_ID(aa64_rndr, ARM_HWCAP2_A64_RNG);
671 GET_FEATURE_ID(aa64_bti, ARM_HWCAP2_A64_BTI);
672 GET_FEATURE_ID(aa64_mte, ARM_HWCAP2_A64_MTE);
24e76ff0
PM		 673
674 return hwcaps;
675}
676
2041df4a
RH		 677#undef GET_FEATURE_ID
678
24e76ff0
PM		 679#endif /* not TARGET_AARCH64 */
680#endif /* TARGET_ARM */
30ac07d4 681
853d6f7a 682#ifdef TARGET_SPARC
a315a145 683#ifdef TARGET_SPARC64
853d6f7a
FB		 684
685#define ELF_START_MMAP 0x80000000
cf973e46
AT		 686#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
687 | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
992f48a0 688#ifndef TARGET_ABI32
cb33da57 689#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
992f48a0
BS		 690#else
691#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
692#endif
853d6f7a 693
a315a145 694#define ELF_CLASS ELFCLASS64
5ef54116 695#define ELF_ARCH EM_SPARCV9
a315a145
FB		 696#else
697#define ELF_START_MMAP 0x80000000
cf973e46
AT		 698#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
699 | HWCAP_SPARC_MULDIV)
853d6f7a 700#define ELF_CLASS ELFCLASS32
853d6f7a 701#define ELF_ARCH EM_SPARC
089a2256 702#endif /* TARGET_SPARC64 */
853d6f7a 703
d97ef72e
RH		 704static inline void init_thread(struct target_pt_regs *regs,
705 struct image_info *infop)
853d6f7a 706{
089a2256 707 /* Note that target_cpu_copy_regs does not read psr/tstate. */
f5155289
FB		 708 regs->pc = infop->entry;
709 regs->npc = regs->pc + 4;
710 regs->y = 0;
089a2256
RH		 711 regs->u_regs[14] = (infop->start_stack - 16 * sizeof(abi_ulong)
712 - TARGET_STACK_BIAS);
853d6f7a 713}
089a2256 714#endif /* TARGET_SPARC */
853d6f7a 715
67867308
FB		 716#ifdef TARGET_PPC
717
4ecd4d16 718#define ELF_MACHINE PPC_ELF_MACHINE
67867308
FB		 719#define ELF_START_MMAP 0x80000000
720
74154d7e 721#if defined(TARGET_PPC64)
84409ddb
JM		 722
723#define elf_check_arch(x) ( (x) == EM_PPC64 )
724
d97ef72e 725#define ELF_CLASS ELFCLASS64
84409ddb
JM		 726
727#else
728
d97ef72e 729#define ELF_CLASS ELFCLASS32
84409ddb
JM		 730
731#endif
732
d97ef72e 733#define ELF_ARCH EM_PPC
67867308 734
df84e4f3
NF		 735/* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
736 See arch/powerpc/include/asm/cputable.h. */
737enum {
3efa9a67 738 QEMU_PPC_FEATURE_32 = 0x80000000,
739 QEMU_PPC_FEATURE_64 = 0x40000000,
740 QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
741 QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
742 QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
743 QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
744 QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
745 QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
746 QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
747 QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
748 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
749 QEMU_PPC_FEATURE_NO_TB = 0x00100000,
750 QEMU_PPC_FEATURE_POWER4 = 0x00080000,
751 QEMU_PPC_FEATURE_POWER5 = 0x00040000,
752 QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
753 QEMU_PPC_FEATURE_CELL = 0x00010000,
754 QEMU_PPC_FEATURE_BOOKE = 0x00008000,
755 QEMU_PPC_FEATURE_SMT = 0x00004000,
756 QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
757 QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
758 QEMU_PPC_FEATURE_PA6T = 0x00000800,
759 QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
760 QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
761 QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
762 QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
763 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
764
765 QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
766 QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
a60438dd
TM		 767
768 /* Feature definitions in AT_HWCAP2. */
769 QEMU_PPC_FEATURE2_ARCH_2_07 = 0x80000000, /* ISA 2.07 */
770 QEMU_PPC_FEATURE2_HAS_HTM = 0x40000000, /* Hardware Transactional Memory */
771 QEMU_PPC_FEATURE2_HAS_DSCR = 0x20000000, /* Data Stream Control Register */
772 QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */
773 QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */
774 QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */
24c373ec
LV		 775 QEMU_PPC_FEATURE2_VEC_CRYPTO = 0x02000000,
776 QEMU_PPC_FEATURE2_HTM_NOSC = 0x01000000,
be0c46d4 777 QEMU_PPC_FEATURE2_ARCH_3_00 = 0x00800000, /* ISA 3.00 */
24c373ec
LV		 778 QEMU_PPC_FEATURE2_HAS_IEEE128 = 0x00400000, /* VSX IEEE Bin Float 128-bit */
779 QEMU_PPC_FEATURE2_DARN = 0x00200000, /* darn random number insn */
780 QEMU_PPC_FEATURE2_SCV = 0x00100000, /* scv syscall */
781 QEMU_PPC_FEATURE2_HTM_NO_SUSPEND = 0x00080000, /* TM w/o suspended state */
df84e4f3
NF		 782};
783
784#define ELF_HWCAP get_elf_hwcap()
785
786static uint32_t get_elf_hwcap(void)
787{
a2247f8e 788 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
df84e4f3
NF		 789 uint32_t features = 0;
790
791 /* We don't have to be terribly complete here; the high points are
792 Altivec/FP/SPE support. Anything else is just a bonus. */
d97ef72e 793#define GET_FEATURE(flag, feature) \
a2247f8e 794 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
58eb5308
MW		 795#define GET_FEATURE2(flags, feature) \
796 do { \
797 if ((cpu->env.insns_flags2 & flags) == flags) { \
798 features |= feature; \
799 } \
800 } while (0)
3efa9a67 801 GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
802 GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
803 GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
804 GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
805 GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
806 GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
807 GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
808 GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
0e019746
TM		 809 GET_FEATURE2(PPC2_DFP, QEMU_PPC_FEATURE_HAS_DFP);
810 GET_FEATURE2(PPC2_VSX, QEMU_PPC_FEATURE_HAS_VSX);
811 GET_FEATURE2((PPC2_PERM_ISA206 | PPC2_DIVE_ISA206 | PPC2_ATOMIC_ISA206 |
812 PPC2_FP_CVT_ISA206 | PPC2_FP_TST_ISA206),
813 QEMU_PPC_FEATURE_ARCH_2_06);
df84e4f3 814#undef GET_FEATURE
0e019746 815#undef GET_FEATURE2
df84e4f3
NF		 816
817 return features;
818}
819
a60438dd
TM		 820#define ELF_HWCAP2 get_elf_hwcap2()
821
822static uint32_t get_elf_hwcap2(void)
823{
824 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
825 uint32_t features = 0;
826
827#define GET_FEATURE(flag, feature) \
828 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
829#define GET_FEATURE2(flag, feature) \
830 do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
831
832 GET_FEATURE(PPC_ISEL, QEMU_PPC_FEATURE2_HAS_ISEL);
833 GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR);
834 GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 |
24c373ec
LV		 835 PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07 |
836 QEMU_PPC_FEATURE2_VEC_CRYPTO);
837 GET_FEATURE2(PPC2_ISA300, QEMU_PPC_FEATURE2_ARCH_3_00 |
8a589aeb 838 QEMU_PPC_FEATURE2_DARN | QEMU_PPC_FEATURE2_HAS_IEEE128);
a60438dd
TM		 839
840#undef GET_FEATURE
841#undef GET_FEATURE2
842
843 return features;
844}
845
f5155289
FB		 846/*
847 * The requirements here are:
848 * - keep the final alignment of sp (sp & 0xf)
849 * - make sure the 32-bit value at the first 16 byte aligned position of
850 * AUXV is greater than 16 for glibc compatibility.
851 * AT_IGNOREPPC is used for that.
852 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
853 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
854 */
0bccf03d 855#define DLINFO_ARCH_ITEMS 5
d97ef72e
RH		 856#define ARCH_DLINFO \
857 do { \
623e250a 858 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \
d97ef72e 859 /* \
82991bed
PM		 860 * Handle glibc compatibility: these magic entries must \
861 * be at the lowest addresses in the final auxv. \
d97ef72e
RH		 862 */ \
863 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
864 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
82991bed
PM		 865 NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \
866 NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \
867 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
d97ef72e 868 } while (0)
f5155289 869
67867308
FB		 870static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
871{
67867308 872 _regs->gpr[1] = infop->start_stack;
74154d7e 873#if defined(TARGET_PPC64)
d90b94cd 874 if (get_ppc64_abi(infop) < 2) {
2ccf97ec
PM		 875 uint64_t val;
876 get_user_u64(val, infop->entry + 8);
877 _regs->gpr[2] = val + infop->load_bias;
878 get_user_u64(val, infop->entry);
879 infop->entry = val + infop->load_bias;
d90b94cd
DK		 880 } else {
881 _regs->gpr[12] = infop->entry; /* r12 set to global entry address */
882 }
84409ddb 883#endif
67867308
FB		 884 _regs->nip = infop->entry;
885}
886
e2f3e741
NF		 887/* See linux kernel: arch/powerpc/include/asm/elf.h. */
888#define ELF_NREG 48
889typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
890
05390248 891static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env)
e2f3e741
NF		 892{
893 int i;
894 target_ulong ccr = 0;
895
896 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
86cd7b2d 897 (*regs)[i] = tswapreg(env->gpr[i]);
e2f3e741
NF		 898 }
899
86cd7b2d
PB		 900 (*regs)[32] = tswapreg(env->nip);
901 (*regs)[33] = tswapreg(env->msr);
902 (*regs)[35] = tswapreg(env->ctr);
903 (*regs)[36] = tswapreg(env->lr);
10de0521 904 (*regs)[37] = tswapreg(cpu_read_xer(env));
e2f3e741
NF		 905
906 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
907 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
908 }
86cd7b2d 909 (*regs)[38] = tswapreg(ccr);
e2f3e741
NF		 910}
911
912#define USE_ELF_CORE_DUMP
d97ef72e 913#define ELF_EXEC_PAGESIZE 4096
67867308
FB		 914
915#endif
916
048f6b4d
FB		 917#ifdef TARGET_MIPS
918
919#define ELF_START_MMAP 0x80000000
920
388bb21a
TS		 921#ifdef TARGET_MIPS64
922#define ELF_CLASS ELFCLASS64
923#else
048f6b4d 924#define ELF_CLASS ELFCLASS32
388bb21a 925#endif
048f6b4d
FB		 926#define ELF_ARCH EM_MIPS
927
ace3d654
CMAB		 928#ifdef TARGET_ABI_MIPSN32
929#define elf_check_abi(x) ((x) & EF_MIPS_ABI2)
930#else
931#define elf_check_abi(x) (!((x) & EF_MIPS_ABI2))
932#endif
933
d97ef72e
RH		 934static inline void init_thread(struct target_pt_regs *regs,
935 struct image_info *infop)
048f6b4d 936{
623a930e 937 regs->cp0_status = 2 << CP0St_KSU;
048f6b4d
FB		 938 regs->cp0_epc = infop->entry;
939 regs->regs[29] = infop->start_stack;
940}
941
51e52606
NF		 942/* See linux kernel: arch/mips/include/asm/elf.h. */
943#define ELF_NREG 45
944typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
945
946/* See linux kernel: arch/mips/include/asm/reg.h. */
947enum {
948#ifdef TARGET_MIPS64
949 TARGET_EF_R0 = 0,
950#else
951 TARGET_EF_R0 = 6,
952#endif
953 TARGET_EF_R26 = TARGET_EF_R0 + 26,
954 TARGET_EF_R27 = TARGET_EF_R0 + 27,
955 TARGET_EF_LO = TARGET_EF_R0 + 32,
956 TARGET_EF_HI = TARGET_EF_R0 + 33,
957 TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
958 TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
959 TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
960 TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
961};
962
963/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
05390248 964static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env)
51e52606
NF		 965{
966 int i;
967
968 for (i = 0; i < TARGET_EF_R0; i++) {
969 (*regs)[i] = 0;
970 }
971 (*regs)[TARGET_EF_R0] = 0;
972
973 for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
a29f998d 974 (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]);
51e52606
NF		 975 }
976
977 (*regs)[TARGET_EF_R26] = 0;
978 (*regs)[TARGET_EF_R27] = 0;
a29f998d
PB		 979 (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]);
980 (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]);
981 (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC);
982 (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr);
983 (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status);
984 (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause);
51e52606
NF		 985}
986
987#define USE_ELF_CORE_DUMP
388bb21a
TS		 988#define ELF_EXEC_PAGESIZE 4096
989
46a1ee4f
JC		 990/* See arch/mips/include/uapi/asm/hwcap.h. */
991enum {
992 HWCAP_MIPS_R6 = (1 << 0),
993 HWCAP_MIPS_MSA = (1 << 1),
9ea313ba
PMD		 994 HWCAP_MIPS_CRC32 = (1 << 2),
995 HWCAP_MIPS_MIPS16 = (1 << 3),
996 HWCAP_MIPS_MDMX = (1 << 4),
997 HWCAP_MIPS_MIPS3D = (1 << 5),
998 HWCAP_MIPS_SMARTMIPS = (1 << 6),
999 HWCAP_MIPS_DSP = (1 << 7),
1000 HWCAP_MIPS_DSP2 = (1 << 8),
1001 HWCAP_MIPS_DSP3 = (1 << 9),
1002 HWCAP_MIPS_MIPS16E2 = (1 << 10),
1003 HWCAP_LOONGSON_MMI = (1 << 11),
1004 HWCAP_LOONGSON_EXT = (1 << 12),
1005 HWCAP_LOONGSON_EXT2 = (1 << 13),
1006 HWCAP_LOONGSON_CPUCFG = (1 << 14),
46a1ee4f
JC		 1007};
1008
1009#define ELF_HWCAP get_elf_hwcap()
1010
7d9a3d96 1011#define GET_FEATURE_INSN(_flag, _hwcap) \
6dd97bfc
PMD		 1012 do { if (cpu->env.insn_flags & (_flag)) { hwcaps |= _hwcap; } } while (0)
1013
388765a0
PMD		 1014#define GET_FEATURE_REG_SET(_reg, _mask, _hwcap) \
1015 do { if (cpu->env._reg & (_mask)) { hwcaps |= _hwcap; } } while (0)
1016
ce543844
PMD		 1017#define GET_FEATURE_REG_EQU(_reg, _start, _length, _val, _hwcap) \
1018 do { \
1019 if (extract32(cpu->env._reg, (_start), (_length)) == (_val)) { \
1020 hwcaps |= _hwcap; \
1021 } \
1022 } while (0)
1023
46a1ee4f
JC		 1024static uint32_t get_elf_hwcap(void)
1025{
1026 MIPSCPU *cpu = MIPS_CPU(thread_cpu);
1027 uint32_t hwcaps = 0;
1028
ce543844
PMD		 1029 GET_FEATURE_REG_EQU(CP0_Config0, CP0C0_AR, CP0C0_AR_LENGTH,
1030 2, HWCAP_MIPS_R6);
388765a0 1031 GET_FEATURE_REG_SET(CP0_Config3, 1 << CP0C3_MSAP, HWCAP_MIPS_MSA);
53673d0f
PMD		 1032 GET_FEATURE_INSN(ASE_LMMI, HWCAP_LOONGSON_MMI);
1033 GET_FEATURE_INSN(ASE_LEXT, HWCAP_LOONGSON_EXT);
46a1ee4f 1034
46a1ee4f
JC		 1035 return hwcaps;
1036}
1037
ce543844 1038#undef GET_FEATURE_REG_EQU
388765a0 1039#undef GET_FEATURE_REG_SET
7d9a3d96 1040#undef GET_FEATURE_INSN
6dd97bfc 1041
048f6b4d
FB		 1042#endif /* TARGET_MIPS */
1043
b779e29e
EI		 1044#ifdef TARGET_MICROBLAZE
1045
1046#define ELF_START_MMAP 0x80000000
1047
0d5d4699 1048#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
b779e29e
EI		 1049
1050#define ELF_CLASS ELFCLASS32
0d5d4699 1051#define ELF_ARCH EM_MICROBLAZE
b779e29e 1052
d97ef72e
RH		 1053static inline void init_thread(struct target_pt_regs *regs,
1054 struct image_info *infop)
b779e29e
EI		 1055{
1056 regs->pc = infop->entry;
1057 regs->r1 = infop->start_stack;
1058
1059}
1060
b779e29e
EI		 1061#define ELF_EXEC_PAGESIZE 4096
1062
e4cbd44d
EI		 1063#define USE_ELF_CORE_DUMP
1064#define ELF_NREG 38
1065typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1066
1067/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
05390248 1068static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env)
e4cbd44d
EI		 1069{
1070 int i, pos = 0;
1071
1072 for (i = 0; i < 32; i++) {
86cd7b2d 1073 (*regs)[pos++] = tswapreg(env->regs[i]);
e4cbd44d
EI		 1074 }
1075
af20a93a 1076 (*regs)[pos++] = tswapreg(env->pc);
1074c0fb 1077 (*regs)[pos++] = tswapreg(mb_cpu_read_msr(env));
af20a93a
RH		 1078 (*regs)[pos++] = 0;
1079 (*regs)[pos++] = tswapreg(env->ear);
1080 (*regs)[pos++] = 0;
1081 (*regs)[pos++] = tswapreg(env->esr);
e4cbd44d
EI		 1082}
1083
b779e29e
EI		 1084#endif /* TARGET_MICROBLAZE */
1085
a0a839b6
MV		 1086#ifdef TARGET_NIOS2
1087
1088#define ELF_START_MMAP 0x80000000
1089
1090#define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
1091
1092#define ELF_CLASS ELFCLASS32
1093#define ELF_ARCH EM_ALTERA_NIOS2
1094
1095static void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1096{
1097 regs->ea = infop->entry;
1098 regs->sp = infop->start_stack;
1099 regs->estatus = 0x3;
1100}
1101
f5ef0e51
RH		 1102#define LO_COMMPAGE TARGET_PAGE_SIZE
1103
1104static bool init_guest_commpage(void)
1105{
1106 static const uint8_t kuser_page[4 + 2 * 64] = {
1107 /* __kuser_helper_version */
1108 [0x00] = 0x02, 0x00, 0x00, 0x00,
1109
1110 /* __kuser_cmpxchg */
1111 [0x04] = 0x3a, 0x6c, 0x3b, 0x00, /* trap 16 */
1112 0x3a, 0x28, 0x00, 0xf8, /* ret */
1113
1114 /* __kuser_sigtramp */
1115 [0x44] = 0xc4, 0x22, 0x80, 0x00, /* movi r2, __NR_rt_sigreturn */
1116 0x3a, 0x68, 0x3b, 0x00, /* trap 0 */
1117 };
1118
1119 void *want = g2h_untagged(LO_COMMPAGE & -qemu_host_page_size);
1120 void *addr = mmap(want, qemu_host_page_size, PROT_READ | PROT_WRITE,
1121 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
1122
1123 if (addr == MAP_FAILED) {
1124 perror("Allocating guest commpage");
1125 exit(EXIT_FAILURE);
1126 }
1127 if (addr != want) {
1128 return false;
1129 }
1130
1131 memcpy(addr, kuser_page, sizeof(kuser_page));
1132
1133 if (mprotect(addr, qemu_host_page_size, PROT_READ)) {
1134 perror("Protecting guest commpage");
1135 exit(EXIT_FAILURE);
1136 }
1137
1138 page_set_flags(LO_COMMPAGE, LO_COMMPAGE + TARGET_PAGE_SIZE,
1139 PAGE_READ | PAGE_EXEC | PAGE_VALID);
1140 return true;
1141}
1142
a0a839b6
MV		 1143#define ELF_EXEC_PAGESIZE 4096
1144
1145#define USE_ELF_CORE_DUMP
1146#define ELF_NREG 49
1147typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1148
1149/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
1150static void elf_core_copy_regs(target_elf_gregset_t *regs,
1151 const CPUNios2State *env)
1152{
1153 int i;
1154
1155 (*regs)[0] = -1;
1156 for (i = 1; i < 8; i++) /* r0-r7 */
1157 (*regs)[i] = tswapreg(env->regs[i + 7]);
1158
1159 for (i = 8; i < 16; i++) /* r8-r15 */
1160 (*regs)[i] = tswapreg(env->regs[i - 8]);
1161
1162 for (i = 16; i < 24; i++) /* r16-r23 */
1163 (*regs)[i] = tswapreg(env->regs[i + 7]);
1164 (*regs)[24] = -1; /* R_ET */
1165 (*regs)[25] = -1; /* R_BT */
1166 (*regs)[26] = tswapreg(env->regs[R_GP]);
1167 (*regs)[27] = tswapreg(env->regs[R_SP]);
1168 (*regs)[28] = tswapreg(env->regs[R_FP]);
1169 (*regs)[29] = tswapreg(env->regs[R_EA]);
1170 (*regs)[30] = -1; /* R_SSTATUS */
1171 (*regs)[31] = tswapreg(env->regs[R_RA]);
1172
1173 (*regs)[32] = tswapreg(env->regs[R_PC]);
1174
1175 (*regs)[33] = -1; /* R_STATUS */
1176 (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]);
1177
1178 for (i = 35; i < 49; i++) /* ... */
1179 (*regs)[i] = -1;
1180}
1181
1182#endif /* TARGET_NIOS2 */
1183
d962783e
JL		 1184#ifdef TARGET_OPENRISC
1185
1186#define ELF_START_MMAP 0x08000000
1187
d962783e
JL		 1188#define ELF_ARCH EM_OPENRISC
1189#define ELF_CLASS ELFCLASS32
1190#define ELF_DATA ELFDATA2MSB
1191
1192static inline void init_thread(struct target_pt_regs *regs,
1193 struct image_info *infop)
1194{
1195 regs->pc = infop->entry;
1196 regs->gpr[1] = infop->start_stack;
1197}
1198
1199#define USE_ELF_CORE_DUMP
1200#define ELF_EXEC_PAGESIZE 8192
1201
1202/* See linux kernel arch/openrisc/include/asm/elf.h. */
1203#define ELF_NREG 34 /* gprs and pc, sr */
1204typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1205
1206static void elf_core_copy_regs(target_elf_gregset_t *regs,
1207 const CPUOpenRISCState *env)
1208{
1209 int i;
1210
1211 for (i = 0; i < 32; i++) {
d89e71e8 1212 (*regs)[i] = tswapreg(cpu_get_gpr(env, i));
d962783e 1213 }
86cd7b2d 1214 (*regs)[32] = tswapreg(env->pc);
84775c43 1215 (*regs)[33] = tswapreg(cpu_get_sr(env));
d962783e
JL		 1216}
1217#define ELF_HWCAP 0
1218#define ELF_PLATFORM NULL
1219
1220#endif /* TARGET_OPENRISC */
1221
fdf9b3e8
FB		 1222#ifdef TARGET_SH4
1223
1224#define ELF_START_MMAP 0x80000000
1225
fdf9b3e8 1226#define ELF_CLASS ELFCLASS32
fdf9b3e8
FB		 1227#define ELF_ARCH EM_SH
1228
d97ef72e
RH		 1229static inline void init_thread(struct target_pt_regs *regs,
1230 struct image_info *infop)
fdf9b3e8 1231{
d97ef72e
RH		 1232 /* Check other registers XXXXX */
1233 regs->pc = infop->entry;
1234 regs->regs[15] = infop->start_stack;
fdf9b3e8
FB		 1235}
1236
7631c97e
NF		 1237/* See linux kernel: arch/sh/include/asm/elf.h. */
1238#define ELF_NREG 23
1239typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1240
1241/* See linux kernel: arch/sh/include/asm/ptrace.h. */
1242enum {
1243 TARGET_REG_PC = 16,
1244 TARGET_REG_PR = 17,
1245 TARGET_REG_SR = 18,
1246 TARGET_REG_GBR = 19,
1247 TARGET_REG_MACH = 20,
1248 TARGET_REG_MACL = 21,
1249 TARGET_REG_SYSCALL = 22
1250};
1251
d97ef72e 1252static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
05390248 1253 const CPUSH4State *env)
7631c97e
NF		 1254{
1255 int i;
1256
1257 for (i = 0; i < 16; i++) {
72cd500b 1258 (*regs)[i] = tswapreg(env->gregs[i]);
7631c97e
NF		 1259 }
1260
86cd7b2d
PB		 1261 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1262 (*regs)[TARGET_REG_PR] = tswapreg(env->pr);
1263 (*regs)[TARGET_REG_SR] = tswapreg(env->sr);
1264 (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr);
1265 (*regs)[TARGET_REG_MACH] = tswapreg(env->mach);
1266 (*regs)[TARGET_REG_MACL] = tswapreg(env->macl);
7631c97e
NF		 1267 (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
1268}
1269
1270#define USE_ELF_CORE_DUMP
fdf9b3e8
FB		 1271#define ELF_EXEC_PAGESIZE 4096
1272
e42fd944
RH		 1273enum {
1274 SH_CPU_HAS_FPU = 0x0001, /* Hardware FPU support */
1275 SH_CPU_HAS_P2_FLUSH_BUG = 0x0002, /* Need to flush the cache in P2 area */
1276 SH_CPU_HAS_MMU_PAGE_ASSOC = 0x0004, /* SH3: TLB way selection bit support */
1277 SH_CPU_HAS_DSP = 0x0008, /* SH-DSP: DSP support */
1278 SH_CPU_HAS_PERF_COUNTER = 0x0010, /* Hardware performance counters */
1279 SH_CPU_HAS_PTEA = 0x0020, /* PTEA register */
1280 SH_CPU_HAS_LLSC = 0x0040, /* movli.l/movco.l */
1281 SH_CPU_HAS_L2_CACHE = 0x0080, /* Secondary cache / URAM */
1282 SH_CPU_HAS_OP32 = 0x0100, /* 32-bit instruction support */
1283 SH_CPU_HAS_PTEAEX = 0x0200, /* PTE ASID Extension support */
1284};
1285
1286#define ELF_HWCAP get_elf_hwcap()
1287
1288static uint32_t get_elf_hwcap(void)
1289{
1290 SuperHCPU *cpu = SUPERH_CPU(thread_cpu);
1291 uint32_t hwcap = 0;
1292
1293 hwcap |= SH_CPU_HAS_FPU;
1294
1295 if (cpu->env.features & SH_FEATURE_SH4A) {
1296 hwcap |= SH_CPU_HAS_LLSC;
1297 }
1298
1299 return hwcap;
1300}
1301
fdf9b3e8
FB		 1302#endif
1303
48733d19
TS		 1304#ifdef TARGET_CRIS
1305
1306#define ELF_START_MMAP 0x80000000
1307
48733d19 1308#define ELF_CLASS ELFCLASS32
48733d19
TS		 1309#define ELF_ARCH EM_CRIS
1310
d97ef72e
RH		 1311static inline void init_thread(struct target_pt_regs *regs,
1312 struct image_info *infop)
48733d19 1313{
d97ef72e 1314 regs->erp = infop->entry;
48733d19
TS		 1315}
1316
48733d19
TS		 1317#define ELF_EXEC_PAGESIZE 8192
1318
1319#endif
1320
e6e5906b
PB		 1321#ifdef TARGET_M68K
1322
1323#define ELF_START_MMAP 0x80000000
1324
d97ef72e 1325#define ELF_CLASS ELFCLASS32
d97ef72e 1326#define ELF_ARCH EM_68K
e6e5906b
PB		 1327
1328/* ??? Does this need to do anything?
d97ef72e 1329 #define ELF_PLAT_INIT(_r) */
e6e5906b 1330
d97ef72e
RH		 1331static inline void init_thread(struct target_pt_regs *regs,
1332 struct image_info *infop)
e6e5906b
PB		 1333{
1334 regs->usp = infop->start_stack;
1335 regs->sr = 0;
1336 regs->pc = infop->entry;
1337}
1338
7a93cc55
NF		 1339/* See linux kernel: arch/m68k/include/asm/elf.h. */
1340#define ELF_NREG 20
1341typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1342
05390248 1343static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env)
7a93cc55 1344{
86cd7b2d
PB		 1345 (*regs)[0] = tswapreg(env->dregs[1]);
1346 (*regs)[1] = tswapreg(env->dregs[2]);
1347 (*regs)[2] = tswapreg(env->dregs[3]);
1348 (*regs)[3] = tswapreg(env->dregs[4]);
1349 (*regs)[4] = tswapreg(env->dregs[5]);
1350 (*regs)[5] = tswapreg(env->dregs[6]);
1351 (*regs)[6] = tswapreg(env->dregs[7]);
1352 (*regs)[7] = tswapreg(env->aregs[0]);
1353 (*regs)[8] = tswapreg(env->aregs[1]);
1354 (*regs)[9] = tswapreg(env->aregs[2]);
1355 (*regs)[10] = tswapreg(env->aregs[3]);
1356 (*regs)[11] = tswapreg(env->aregs[4]);
1357 (*regs)[12] = tswapreg(env->aregs[5]);
1358 (*regs)[13] = tswapreg(env->aregs[6]);
1359 (*regs)[14] = tswapreg(env->dregs[0]);
1360 (*regs)[15] = tswapreg(env->aregs[7]);
1361 (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */
1362 (*regs)[17] = tswapreg(env->sr);
1363 (*regs)[18] = tswapreg(env->pc);
7a93cc55
NF		 1364 (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
1365}
1366
1367#define USE_ELF_CORE_DUMP
d97ef72e 1368#define ELF_EXEC_PAGESIZE 8192
e6e5906b
PB		 1369
1370#endif
1371
7a3148a9
JM		 1372#ifdef TARGET_ALPHA
1373
1374#define ELF_START_MMAP (0x30000000000ULL)
1375
7a3148a9 1376#define ELF_CLASS ELFCLASS64
7a3148a9
JM		 1377#define ELF_ARCH EM_ALPHA
1378
d97ef72e
RH		 1379static inline void init_thread(struct target_pt_regs *regs,
1380 struct image_info *infop)
7a3148a9
JM		 1381{
1382 regs->pc = infop->entry;
1383 regs->ps = 8;
1384 regs->usp = infop->start_stack;
7a3148a9
JM		 1385}
1386
7a3148a9
JM		 1387#define ELF_EXEC_PAGESIZE 8192
1388
1389#endif /* TARGET_ALPHA */
1390
a4c075f1
UH		 1391#ifdef TARGET_S390X
1392
1393#define ELF_START_MMAP (0x20000000000ULL)
1394
a4c075f1
UH		 1395#define ELF_CLASS ELFCLASS64
1396#define ELF_DATA ELFDATA2MSB
1397#define ELF_ARCH EM_S390
1398
6d88baf1
DH		 1399#include "elf.h"
1400
1401#define ELF_HWCAP get_elf_hwcap()
1402
1403#define GET_FEATURE(_feat, _hwcap) \
1404 do { if (s390_has_feat(_feat)) { hwcap |= _hwcap; } } while (0)
1405
1406static uint32_t get_elf_hwcap(void)
1407{
1408 /*
1409 * Let's assume we always have esan3 and zarch.
1410 * 31-bit processes can use 64-bit registers (high gprs).
1411 */
1412 uint32_t hwcap = HWCAP_S390_ESAN3 | HWCAP_S390_ZARCH | HWCAP_S390_HIGH_GPRS;
1413
1414 GET_FEATURE(S390_FEAT_STFLE, HWCAP_S390_STFLE);
1415 GET_FEATURE(S390_FEAT_MSA, HWCAP_S390_MSA);
1416 GET_FEATURE(S390_FEAT_LONG_DISPLACEMENT, HWCAP_S390_LDISP);
1417 GET_FEATURE(S390_FEAT_EXTENDED_IMMEDIATE, HWCAP_S390_EIMM);
1418 if (s390_has_feat(S390_FEAT_EXTENDED_TRANSLATION_3) &&
1419 s390_has_feat(S390_FEAT_ETF3_ENH)) {
1420 hwcap |= HWCAP_S390_ETF3EH;
1421 }
1422 GET_FEATURE(S390_FEAT_VECTOR, HWCAP_S390_VXRS);
da215c23 1423 GET_FEATURE(S390_FEAT_VECTOR_ENH, HWCAP_S390_VXRS_EXT);
6d88baf1
DH		 1424
1425 return hwcap;
1426}
1427
a4c075f1
UH		 1428static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1429{
1430 regs->psw.addr = infop->entry;
1431 regs->psw.mask = PSW_MASK_64 | PSW_MASK_32;
1432 regs->gprs[15] = infop->start_stack;
1433}
1434
4a1e8931
IL		 1435/* See linux kernel: arch/s390/include/uapi/asm/ptrace.h (s390_regs). */
1436#define ELF_NREG 27
1437typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1438
1439enum {
1440 TARGET_REG_PSWM = 0,
1441 TARGET_REG_PSWA = 1,
1442 TARGET_REG_GPRS = 2,
1443 TARGET_REG_ARS = 18,
1444 TARGET_REG_ORIG_R2 = 26,
1445};
1446
1447static void elf_core_copy_regs(target_elf_gregset_t *regs,
1448 const CPUS390XState *env)
1449{
1450 int i;
1451 uint32_t *aregs;
1452
1453 (*regs)[TARGET_REG_PSWM] = tswapreg(env->psw.mask);
1454 (*regs)[TARGET_REG_PSWA] = tswapreg(env->psw.addr);
1455 for (i = 0; i < 16; i++) {
1456 (*regs)[TARGET_REG_GPRS + i] = tswapreg(env->regs[i]);
1457 }
1458 aregs = (uint32_t *)&((*regs)[TARGET_REG_ARS]);
1459 for (i = 0; i < 16; i++) {
1460 aregs[i] = tswap32(env->aregs[i]);
1461 }
1462 (*regs)[TARGET_REG_ORIG_R2] = 0;
1463}
1464
1465#define USE_ELF_CORE_DUMP
1466#define ELF_EXEC_PAGESIZE 4096
1467
a4c075f1
UH		 1468#endif /* TARGET_S390X */
1469
47ae93cd
MC		 1470#ifdef TARGET_RISCV
1471
1472#define ELF_START_MMAP 0x80000000
1473#define ELF_ARCH EM_RISCV
1474
1475#ifdef TARGET_RISCV32
1476#define ELF_CLASS ELFCLASS32
1477#else
1478#define ELF_CLASS ELFCLASS64
1479#endif
1480
cb46938c
KC		 1481#define ELF_HWCAP get_elf_hwcap()
1482
1483static uint32_t get_elf_hwcap(void)
1484{
1485#define MISA_BIT(EXT) (1 << (EXT - 'A'))
1486 RISCVCPU *cpu = RISCV_CPU(thread_cpu);
1487 uint32_t mask = MISA_BIT('I') | MISA_BIT('M') | MISA_BIT('A')
1488 | MISA_BIT('F') | MISA_BIT('D') | MISA_BIT('C');
1489
e91a7227 1490 return cpu->env.misa_ext & mask;
cb46938c
KC		 1491#undef MISA_BIT
1492}
1493
47ae93cd
MC		 1494static inline void init_thread(struct target_pt_regs *regs,
1495 struct image_info *infop)
1496{
1497 regs->sepc = infop->entry;
1498 regs->sp = infop->start_stack;
1499}
1500
1501#define ELF_EXEC_PAGESIZE 4096
1502
1503#endif /* TARGET_RISCV */
1504
7c248bcd
RH		 1505#ifdef TARGET_HPPA
1506
1507#define ELF_START_MMAP 0x80000000
1508#define ELF_CLASS ELFCLASS32
1509#define ELF_ARCH EM_PARISC
1510#define ELF_PLATFORM "PARISC"
1511#define STACK_GROWS_DOWN 0
1512#define STACK_ALIGNMENT 64
1513
1514static inline void init_thread(struct target_pt_regs *regs,
1515 struct image_info *infop)
1516{
1517 regs->iaoq[0] = infop->entry;
1518 regs->iaoq[1] = infop->entry + 4;
1519 regs->gr[23] = 0;
1520 regs->gr[24] = infop->arg_start;
1521 regs->gr[25] = (infop->arg_end - infop->arg_start) / sizeof(abi_ulong);
1522 /* The top-of-stack contains a linkage buffer. */
1523 regs->gr[30] = infop->start_stack + 64;
1524 regs->gr[31] = infop->entry;
1525}
1526
1527#endif /* TARGET_HPPA */
1528
ba7651fb
MF		 1529#ifdef TARGET_XTENSA
1530
1531#define ELF_START_MMAP 0x20000000
1532
1533#define ELF_CLASS ELFCLASS32
1534#define ELF_ARCH EM_XTENSA
1535
1536static inline void init_thread(struct target_pt_regs *regs,
1537 struct image_info *infop)
1538{
1539 regs->windowbase = 0;
1540 regs->windowstart = 1;
1541 regs->areg[1] = infop->start_stack;
1542 regs->pc = infop->entry;
1543}
1544
1545/* See linux kernel: arch/xtensa/include/asm/elf.h. */
1546#define ELF_NREG 128
1547typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1548
1549enum {
1550 TARGET_REG_PC,
1551 TARGET_REG_PS,
1552 TARGET_REG_LBEG,
1553 TARGET_REG_LEND,
1554 TARGET_REG_LCOUNT,
1555 TARGET_REG_SAR,
1556 TARGET_REG_WINDOWSTART,
1557 TARGET_REG_WINDOWBASE,
1558 TARGET_REG_THREADPTR,
1559 TARGET_REG_AR0 = 64,
1560};
1561
1562static void elf_core_copy_regs(target_elf_gregset_t *regs,
1563 const CPUXtensaState *env)
1564{
1565 unsigned i;
1566
1567 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1568 (*regs)[TARGET_REG_PS] = tswapreg(env->sregs[PS] & ~PS_EXCM);
1569 (*regs)[TARGET_REG_LBEG] = tswapreg(env->sregs[LBEG]);
1570 (*regs)[TARGET_REG_LEND] = tswapreg(env->sregs[LEND]);
1571 (*regs)[TARGET_REG_LCOUNT] = tswapreg(env->sregs[LCOUNT]);
1572 (*regs)[TARGET_REG_SAR] = tswapreg(env->sregs[SAR]);
1573 (*regs)[TARGET_REG_WINDOWSTART] = tswapreg(env->sregs[WINDOW_START]);
1574 (*regs)[TARGET_REG_WINDOWBASE] = tswapreg(env->sregs[WINDOW_BASE]);
1575 (*regs)[TARGET_REG_THREADPTR] = tswapreg(env->uregs[THREADPTR]);
1576 xtensa_sync_phys_from_window((CPUXtensaState *)env);
1577 for (i = 0; i < env->config->nareg; ++i) {
1578 (*regs)[TARGET_REG_AR0 + i] = tswapreg(env->phys_regs[i]);
1579 }
1580}
1581
1582#define USE_ELF_CORE_DUMP
1583#define ELF_EXEC_PAGESIZE 4096
1584
1585#endif /* TARGET_XTENSA */
1586
d2a56bd2
TS		 1587#ifdef TARGET_HEXAGON
1588
1589#define ELF_START_MMAP 0x20000000
1590
1591#define ELF_CLASS ELFCLASS32
1592#define ELF_ARCH EM_HEXAGON
1593
1594static inline void init_thread(struct target_pt_regs *regs,
1595 struct image_info *infop)
1596{
1597 regs->sepc = infop->entry;
1598 regs->sp = infop->start_stack;
1599}
1600
1601#endif /* TARGET_HEXAGON */
1602
15338fd7
FB		 1603#ifndef ELF_PLATFORM
1604#define ELF_PLATFORM (NULL)
1605#endif
1606
75be901c
PC		 1607#ifndef ELF_MACHINE
1608#define ELF_MACHINE ELF_ARCH
1609#endif
1610
d276a604
PC		 1611#ifndef elf_check_arch
1612#define elf_check_arch(x) ((x) == ELF_ARCH)
1613#endif
1614
ace3d654
CMAB		 1615#ifndef elf_check_abi
1616#define elf_check_abi(x) (1)
1617#endif
1618
15338fd7
FB		 1619#ifndef ELF_HWCAP
1620#define ELF_HWCAP 0
1621#endif
1622
7c4ee5bc
RH		 1623#ifndef STACK_GROWS_DOWN
1624#define STACK_GROWS_DOWN 1
1625#endif
1626
1627#ifndef STACK_ALIGNMENT
1628#define STACK_ALIGNMENT 16
1629#endif
1630
992f48a0 1631#ifdef TARGET_ABI32
cb33da57 1632#undef ELF_CLASS
992f48a0 1633#define ELF_CLASS ELFCLASS32
cb33da57
BS		 1634#undef bswaptls
1635#define bswaptls(ptr) bswap32s(ptr)
1636#endif
1637
31e31b8a 1638#include "elf.h"
09bfb054 1639
e8384b37
RH		 1640/* We must delay the following stanzas until after "elf.h". */
1641#if defined(TARGET_AARCH64)
1642
1643static bool arch_parse_elf_property(uint32_t pr_type, uint32_t pr_datasz,
1644 const uint32_t *data,
1645 struct image_info *info,
1646 Error **errp)
1647{
1648 if (pr_type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) {
1649 if (pr_datasz != sizeof(uint32_t)) {
1650 error_setg(errp, "Ill-formed GNU_PROPERTY_AARCH64_FEATURE_1_AND");
1651 return false;
1652 }
1653 /* We will extract GNU_PROPERTY_AARCH64_FEATURE_1_BTI later. */
1654 info->note_flags = *data;
1655 }
1656 return true;
1657}
1658#define ARCH_USE_GNU_PROPERTY 1
1659
1660#else
1661
83f990eb
RH		 1662static bool arch_parse_elf_property(uint32_t pr_type, uint32_t pr_datasz,
1663 const uint32_t *data,
1664 struct image_info *info,
1665 Error **errp)
1666{
1667 g_assert_not_reached();
1668}
1669#define ARCH_USE_GNU_PROPERTY 0
1670
e8384b37
RH		 1671#endif
1672
09bfb054
FB		 1673struct exec
1674{
d97ef72e
RH		 1675 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
1676 unsigned int a_text; /* length of text, in bytes */
1677 unsigned int a_data; /* length of data, in bytes */
1678 unsigned int a_bss; /* length of uninitialized data area, in bytes */
1679 unsigned int a_syms; /* length of symbol table data in file, in bytes */
1680 unsigned int a_entry; /* start address */
1681 unsigned int a_trsize; /* length of relocation info for text, in bytes */
1682 unsigned int a_drsize; /* length of relocation info for data, in bytes */
09bfb054
FB		 1683};
1684
1685
1686#define N_MAGIC(exec) ((exec).a_info & 0xffff)
1687#define OMAGIC 0407
1688#define NMAGIC 0410
1689#define ZMAGIC 0413
1690#define QMAGIC 0314
1691
31e31b8a 1692/* Necessary parameters */
94894ff2
SB		 1693#define TARGET_ELF_EXEC_PAGESIZE \
1694 (((eppnt->p_align & ~qemu_host_page_mask) != 0) ? \
1695 TARGET_PAGE_SIZE : MAX(qemu_host_page_size, TARGET_PAGE_SIZE))
1696#define TARGET_ELF_PAGELENGTH(_v) ROUND_UP((_v), TARGET_ELF_EXEC_PAGESIZE)
79cb1f1d
YK		 1697#define TARGET_ELF_PAGESTART(_v) ((_v) & \
1698 ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1))
54936004 1699#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
31e31b8a 1700
e0d1673d 1701#define DLINFO_ITEMS 16
31e31b8a 1702
09bfb054
FB		 1703static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
1704{
d97ef72e 1705 memcpy(to, from, n);
09bfb054 1706}
d691f669 1707
31e31b8a 1708#ifdef BSWAP_NEEDED
92a31b1f 1709static void bswap_ehdr(struct elfhdr *ehdr)
31e31b8a 1710{
d97ef72e
RH		 1711 bswap16s(&ehdr->e_type); /* Object file type */
1712 bswap16s(&ehdr->e_machine); /* Architecture */
1713 bswap32s(&ehdr->e_version); /* Object file version */
1714 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
1715 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
1716 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
1717 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
1718 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
1719 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
1720 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
1721 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
1722 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
1723 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
31e31b8a
FB		 1724}
1725
991f8f0c 1726static void bswap_phdr(struct elf_phdr *phdr, int phnum)
31e31b8a 1727{
991f8f0c
RH		 1728 int i;
1729 for (i = 0; i < phnum; ++i, ++phdr) {
1730 bswap32s(&phdr->p_type); /* Segment type */
1731 bswap32s(&phdr->p_flags); /* Segment flags */
1732 bswaptls(&phdr->p_offset); /* Segment file offset */
1733 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
1734 bswaptls(&phdr->p_paddr); /* Segment physical address */
1735 bswaptls(&phdr->p_filesz); /* Segment size in file */
1736 bswaptls(&phdr->p_memsz); /* Segment size in memory */
1737 bswaptls(&phdr->p_align); /* Segment alignment */
1738 }
31e31b8a 1739}
689f936f 1740
991f8f0c 1741static void bswap_shdr(struct elf_shdr *shdr, int shnum)
689f936f 1742{
991f8f0c
RH		 1743 int i;
1744 for (i = 0; i < shnum; ++i, ++shdr) {
1745 bswap32s(&shdr->sh_name);
1746 bswap32s(&shdr->sh_type);
1747 bswaptls(&shdr->sh_flags);
1748 bswaptls(&shdr->sh_addr);
1749 bswaptls(&shdr->sh_offset);
1750 bswaptls(&shdr->sh_size);
1751 bswap32s(&shdr->sh_link);
1752 bswap32s(&shdr->sh_info);
1753 bswaptls(&shdr->sh_addralign);
1754 bswaptls(&shdr->sh_entsize);
1755 }
689f936f
FB		 1756}
1757
7a3148a9 1758static void bswap_sym(struct elf_sym *sym)
689f936f
FB		 1759{
1760 bswap32s(&sym->st_name);
7a3148a9
JM		 1761 bswaptls(&sym->st_value);
1762 bswaptls(&sym->st_size);
689f936f
FB		 1763 bswap16s(&sym->st_shndx);
1764}
5dd0db52
SM		 1765
1766#ifdef TARGET_MIPS
1767static void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags)
1768{
1769 bswap16s(&abiflags->version);
1770 bswap32s(&abiflags->ases);
1771 bswap32s(&abiflags->isa_ext);
1772 bswap32s(&abiflags->flags1);
1773 bswap32s(&abiflags->flags2);
1774}
1775#endif
991f8f0c
RH		 1776#else
1777static inline void bswap_ehdr(struct elfhdr *ehdr) { }
1778static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
1779static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
1780static inline void bswap_sym(struct elf_sym *sym) { }
5dd0db52
SM		 1781#ifdef TARGET_MIPS
1782static inline void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags) { }
1783#endif
31e31b8a
FB		 1784#endif
1785
edf8e2af 1786#ifdef USE_ELF_CORE_DUMP
9349b4f9 1787static int elf_core_dump(int, const CPUArchState *);
edf8e2af 1788#endif /* USE_ELF_CORE_DUMP */
682674b8 1789static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
edf8e2af 1790
9058abdd
RH		 1791/* Verify the portions of EHDR within E_IDENT for the target.
1792 This can be performed before bswapping the entire header. */
1793static bool elf_check_ident(struct elfhdr *ehdr)
1794{
1795 return (ehdr->e_ident[EI_MAG0] == ELFMAG0
1796 && ehdr->e_ident[EI_MAG1] == ELFMAG1
1797 && ehdr->e_ident[EI_MAG2] == ELFMAG2
1798 && ehdr->e_ident[EI_MAG3] == ELFMAG3
1799 && ehdr->e_ident[EI_CLASS] == ELF_CLASS
1800 && ehdr->e_ident[EI_DATA] == ELF_DATA
1801 && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
1802}
1803
1804/* Verify the portions of EHDR outside of E_IDENT for the target.
1805 This has to wait until after bswapping the header. */
1806static bool elf_check_ehdr(struct elfhdr *ehdr)
1807{
1808 return (elf_check_arch(ehdr->e_machine)
ace3d654 1809 && elf_check_abi(ehdr->e_flags)
9058abdd
RH		 1810 && ehdr->e_ehsize == sizeof(struct elfhdr)
1811 && ehdr->e_phentsize == sizeof(struct elf_phdr)
9058abdd
RH		 1812 && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
1813}
1814
31e31b8a 1815/*
e5fe0c52 1816 * 'copy_elf_strings()' copies argument/envelope strings from user
31e31b8a
FB		 1817 * memory to free pages in kernel mem. These are in a format ready
1818 * to be put directly into the top of new user memory.
1819 *
1820 */
59baae9a
SB		 1821static abi_ulong copy_elf_strings(int argc, char **argv, char *scratch,
1822 abi_ulong p, abi_ulong stack_limit)
31e31b8a 1823{
59baae9a 1824 char *tmp;
7c4ee5bc 1825 int len, i;
59baae9a 1826 abi_ulong top = p;
31e31b8a
FB		 1827
1828 if (!p) {
d97ef72e 1829 return 0; /* bullet-proofing */
31e31b8a 1830 }
59baae9a 1831
7c4ee5bc
RH		 1832 if (STACK_GROWS_DOWN) {
1833 int offset = ((p - 1) % TARGET_PAGE_SIZE) + 1;
1834 for (i = argc - 1; i >= 0; --i) {
1835 tmp = argv[i];
1836 if (!tmp) {
1837 fprintf(stderr, "VFS: argc is wrong");
1838 exit(-1);
1839 }
1840 len = strlen(tmp) + 1;
1841 tmp += len;
59baae9a 1842
7c4ee5bc
RH		 1843 if (len > (p - stack_limit)) {
1844 return 0;
1845 }
1846 while (len) {
1847 int bytes_to_copy = (len > offset) ? offset : len;
1848 tmp -= bytes_to_copy;
1849 p -= bytes_to_copy;
1850 offset -= bytes_to_copy;
1851 len -= bytes_to_copy;
1852
1853 memcpy_fromfs(scratch + offset, tmp, bytes_to_copy);
1854
1855 if (offset == 0) {
1856 memcpy_to_target(p, scratch, top - p);
1857 top = p;
1858 offset = TARGET_PAGE_SIZE;
1859 }
1860 }
d97ef72e 1861 }
7c4ee5bc
RH		 1862 if (p != top) {
1863 memcpy_to_target(p, scratch + offset, top - p);
d97ef72e 1864 }
7c4ee5bc
RH		 1865 } else {
1866 int remaining = TARGET_PAGE_SIZE - (p % TARGET_PAGE_SIZE);
1867 for (i = 0; i < argc; ++i) {
1868 tmp = argv[i];
1869 if (!tmp) {
1870 fprintf(stderr, "VFS: argc is wrong");
1871 exit(-1);
1872 }
1873 len = strlen(tmp) + 1;
1874 if (len > (stack_limit - p)) {
1875 return 0;
1876 }
1877 while (len) {
1878 int bytes_to_copy = (len > remaining) ? remaining : len;
1879
1880 memcpy_fromfs(scratch + (p - top), tmp, bytes_to_copy);
1881
1882 tmp += bytes_to_copy;
1883 remaining -= bytes_to_copy;
1884 p += bytes_to_copy;
1885 len -= bytes_to_copy;
1886
1887 if (remaining == 0) {
1888 memcpy_to_target(top, scratch, p - top);
1889 top = p;
1890 remaining = TARGET_PAGE_SIZE;
1891 }
d97ef72e
RH		 1892 }
1893 }
7c4ee5bc
RH		 1894 if (p != top) {
1895 memcpy_to_target(top, scratch, p - top);
1896 }
59baae9a
SB		 1897 }
1898
31e31b8a
FB		 1899 return p;
1900}
1901
59baae9a
SB		 1902/* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of
1903 * argument/environment space. Newer kernels (>2.6.33) allow more,
1904 * dependent on stack size, but guarantee at least 32 pages for
1905 * backwards compatibility.
1906 */
1907#define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE)
1908
1909static abi_ulong setup_arg_pages(struct linux_binprm *bprm,
992f48a0 1910 struct image_info *info)
53a5960a 1911{
59baae9a 1912 abi_ulong size, error, guard;
31e31b8a 1913
703e0e89 1914 size = guest_stack_size;
59baae9a
SB		 1915 if (size < STACK_LOWER_LIMIT) {
1916 size = STACK_LOWER_LIMIT;
60dcbcb5
RH		 1917 }
1918 guard = TARGET_PAGE_SIZE;
1919 if (guard < qemu_real_host_page_size) {
1920 guard = qemu_real_host_page_size;
1921 }
1922
1923 error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
1924 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
09bfb054 1925 if (error == -1) {
60dcbcb5 1926 perror("mmap stack");
09bfb054
FB		 1927 exit(-1);
1928 }
31e31b8a 1929
60dcbcb5 1930 /* We reserve one extra page at the top of the stack as guard. */
7c4ee5bc
RH		 1931 if (STACK_GROWS_DOWN) {
1932 target_mprotect(error, guard, PROT_NONE);
1933 info->stack_limit = error + guard;
1934 return info->stack_limit + size - sizeof(void *);
1935 } else {
1936 target_mprotect(error + size, guard, PROT_NONE);
1937 info->stack_limit = error + size;
1938 return error;
1939 }
31e31b8a
FB		 1940}
1941
cf129f3a
RH		 1942/* Map and zero the bss. We need to explicitly zero any fractional pages
1943 after the data section (i.e. bss). */
1944static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot)
31e31b8a 1945{
cf129f3a
RH		 1946 uintptr_t host_start, host_map_start, host_end;
1947
1948 last_bss = TARGET_PAGE_ALIGN(last_bss);
1949
1950 /* ??? There is confusion between qemu_real_host_page_size and
1951 qemu_host_page_size here and elsewhere in target_mmap, which
1952 may lead to the end of the data section mapping from the file
1953 not being mapped. At least there was an explicit test and
1954 comment for that here, suggesting that "the file size must
1955 be known". The comment probably pre-dates the introduction
1956 of the fstat system call in target_mmap which does in fact
1957 find out the size. What isn't clear is if the workaround
1958 here is still actually needed. For now, continue with it,
1959 but merge it with the "normal" mmap that would allocate the bss. */
1960
3e8f1628
RH		 1961 host_start = (uintptr_t) g2h_untagged(elf_bss);
1962 host_end = (uintptr_t) g2h_untagged(last_bss);
0c2d70c4 1963 host_map_start = REAL_HOST_PAGE_ALIGN(host_start);
cf129f3a
RH		 1964
1965 if (host_map_start < host_end) {
1966 void *p = mmap((void *)host_map_start, host_end - host_map_start,
1967 prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1968 if (p == MAP_FAILED) {
1969 perror("cannot mmap brk");
1970 exit(-1);
853d6f7a 1971 }
f46e9a0b 1972 }
853d6f7a 1973
f46e9a0b
TM		 1974 /* Ensure that the bss page(s) are valid */
1975 if ((page_get_flags(last_bss-1) & prot) != prot) {
1976 page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot | PAGE_VALID);
cf129f3a 1977 }
31e31b8a 1978
cf129f3a
RH		 1979 if (host_start < host_map_start) {
1980 memset((void *)host_start, 0, host_map_start - host_start);
1981 }
1982}
53a5960a 1983
cf58affe
CL		 1984#ifdef TARGET_ARM
1985static int elf_is_fdpic(struct elfhdr *exec)
1986{
1987 return exec->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC;
1988}
1989#else
a99856cd
CL		 1990/* Default implementation, always false. */
1991static int elf_is_fdpic(struct elfhdr *exec)
1992{
1993 return 0;
1994}
cf58affe 1995#endif
a99856cd 1996
1af02e83
MF		 1997static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp)
1998{
1999 uint16_t n;
2000 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs;
2001
2002 /* elf32_fdpic_loadseg */
2003 n = info->nsegs;
2004 while (n--) {
2005 sp -= 12;
2006 put_user_u32(loadsegs[n].addr, sp+0);
2007 put_user_u32(loadsegs[n].p_vaddr, sp+4);
2008 put_user_u32(loadsegs[n].p_memsz, sp+8);
2009 }
2010
2011 /* elf32_fdpic_loadmap */
2012 sp -= 4;
2013 put_user_u16(0, sp+0); /* version */
2014 put_user_u16(info->nsegs, sp+2); /* nsegs */
2015
2016 info->personality = PER_LINUX_FDPIC;
2017 info->loadmap_addr = sp;
2018
2019 return sp;
2020}
1af02e83 2021
992f48a0 2022static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
8e62a717
RH		 2023 struct elfhdr *exec,
2024 struct image_info *info,
2025 struct image_info *interp_info)
31e31b8a 2026{
d97ef72e 2027 abi_ulong sp;
7c4ee5bc 2028 abi_ulong u_argc, u_argv, u_envp, u_auxv;
d97ef72e 2029 int size;
14322bad
LA		 2030 int i;
2031 abi_ulong u_rand_bytes;
2032 uint8_t k_rand_bytes[16];
d97ef72e
RH		 2033 abi_ulong u_platform;
2034 const char *k_platform;
2035 const int n = sizeof(elf_addr_t);
2036
2037 sp = p;
1af02e83 2038
1af02e83
MF		 2039 /* Needs to be before we load the env/argc/... */
2040 if (elf_is_fdpic(exec)) {
2041 /* Need 4 byte alignment for these structs */
2042 sp &= ~3;
2043 sp = loader_build_fdpic_loadmap(info, sp);
2044 info->other_info = interp_info;
2045 if (interp_info) {
2046 interp_info->other_info = info;
2047 sp = loader_build_fdpic_loadmap(interp_info, sp);
3cb10cfa
CL		 2048 info->interpreter_loadmap_addr = interp_info->loadmap_addr;
2049 info->interpreter_pt_dynamic_addr = interp_info->pt_dynamic_addr;
2050 } else {
2051 info->interpreter_loadmap_addr = 0;
2052 info->interpreter_pt_dynamic_addr = 0;
1af02e83
MF		 2053 }
2054 }
1af02e83 2055
d97ef72e
RH		 2056 u_platform = 0;
2057 k_platform = ELF_PLATFORM;
2058 if (k_platform) {
2059 size_t len = strlen(k_platform) + 1;
7c4ee5bc
RH		 2060 if (STACK_GROWS_DOWN) {
2061 sp -= (len + n - 1) & ~(n - 1);
2062 u_platform = sp;
2063 /* FIXME - check return value of memcpy_to_target() for failure */
2064 memcpy_to_target(sp, k_platform, len);
2065 } else {
2066 memcpy_to_target(sp, k_platform, len);
2067 u_platform = sp;
2068 sp += len + 1;
2069 }
2070 }
2071
2072 /* Provide 16 byte alignment for the PRNG, and basic alignment for
2073 * the argv and envp pointers.
2074 */
2075 if (STACK_GROWS_DOWN) {
2076 sp = QEMU_ALIGN_DOWN(sp, 16);
2077 } else {
2078 sp = QEMU_ALIGN_UP(sp, 16);
d97ef72e 2079 }
14322bad
LA		 2080
2081 /*
c6a2377f 2082 * Generate 16 random bytes for userspace PRNG seeding.
14322bad 2083 */
c6a2377f 2084 qemu_guest_getrandom_nofail(k_rand_bytes, sizeof(k_rand_bytes));
7c4ee5bc
RH		 2085 if (STACK_GROWS_DOWN) {
2086 sp -= 16;
2087 u_rand_bytes = sp;
2088 /* FIXME - check return value of memcpy_to_target() for failure */
2089 memcpy_to_target(sp, k_rand_bytes, 16);
2090 } else {
2091 memcpy_to_target(sp, k_rand_bytes, 16);
2092 u_rand_bytes = sp;
2093 sp += 16;
2094 }
14322bad 2095
d97ef72e
RH		 2096 size = (DLINFO_ITEMS + 1) * 2;
2097 if (k_platform)
2098 size += 2;
f5155289 2099#ifdef DLINFO_ARCH_ITEMS
d97ef72e 2100 size += DLINFO_ARCH_ITEMS * 2;
ad6919dc
PM		 2101#endif
2102#ifdef ELF_HWCAP2
2103 size += 2;
f5155289 2104#endif
f516511e
PM		 2105 info->auxv_len = size * n;
2106
d97ef72e 2107 size += envc + argc + 2;
b9329d4b 2108 size += 1; /* argc itself */
d97ef72e 2109 size *= n;
7c4ee5bc
RH		 2110
2111 /* Allocate space and finalize stack alignment for entry now. */
2112 if (STACK_GROWS_DOWN) {
2113 u_argc = QEMU_ALIGN_DOWN(sp - size, STACK_ALIGNMENT);
2114 sp = u_argc;
2115 } else {
2116 u_argc = sp;
2117 sp = QEMU_ALIGN_UP(sp + size, STACK_ALIGNMENT);
2118 }
2119
2120 u_argv = u_argc + n;
2121 u_envp = u_argv + (argc + 1) * n;
2122 u_auxv = u_envp + (envc + 1) * n;
2123 info->saved_auxv = u_auxv;
2124 info->arg_start = u_argv;
2125 info->arg_end = u_argv + argc * n;
d97ef72e
RH		 2126
2127 /* This is correct because Linux defines
2128 * elf_addr_t as Elf32_Off / Elf64_Off
2129 */
2130#define NEW_AUX_ENT(id, val) do { \
7c4ee5bc
RH		 2131 put_user_ual(id, u_auxv); u_auxv += n; \
2132 put_user_ual(val, u_auxv); u_auxv += n; \
d97ef72e
RH		 2133 } while(0)
2134
82991bed
PM		 2135#ifdef ARCH_DLINFO
2136 /*
2137 * ARCH_DLINFO must come first so platform specific code can enforce
2138 * special alignment requirements on the AUXV if necessary (eg. PPC).
2139 */
2140 ARCH_DLINFO;
2141#endif
f516511e
PM		 2142 /* There must be exactly DLINFO_ITEMS entries here, or the assert
2143 * on info->auxv_len will trigger.
2144 */
8e62a717 2145 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff));
d97ef72e
RH		 2146 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
2147 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
33143c44
LV		 2148 if ((info->alignment & ~qemu_host_page_mask) != 0) {
2149 /* Target doesn't support host page size alignment */
2150 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
2151 } else {
2152 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(MAX(TARGET_PAGE_SIZE,
2153 qemu_host_page_size)));
2154 }
8e62a717 2155 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
d97ef72e 2156 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
8e62a717 2157 NEW_AUX_ENT(AT_ENTRY, info->entry);
d97ef72e
RH		 2158 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
2159 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
2160 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
2161 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
2162 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
2163 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
14322bad 2164 NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
444cd5c3 2165 NEW_AUX_ENT(AT_SECURE, (abi_ulong) qemu_getauxval(AT_SECURE));
e0d1673d 2166 NEW_AUX_ENT(AT_EXECFN, info->file_string);
14322bad 2167
ad6919dc
PM		 2168#ifdef ELF_HWCAP2
2169 NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2);
2170#endif
2171
7c4ee5bc 2172 if (u_platform) {
d97ef72e 2173 NEW_AUX_ENT(AT_PLATFORM, u_platform);
7c4ee5bc 2174 }
7c4ee5bc 2175 NEW_AUX_ENT (AT_NULL, 0);
f5155289
FB		 2176#undef NEW_AUX_ENT
2177
f516511e
PM		 2178 /* Check that our initial calculation of the auxv length matches how much
2179 * we actually put into it.
2180 */
2181 assert(info->auxv_len == u_auxv - info->saved_auxv);
7c4ee5bc
RH		 2182
2183 put_user_ual(argc, u_argc);
2184
2185 p = info->arg_strings;
2186 for (i = 0; i < argc; ++i) {
2187 put_user_ual(p, u_argv);
2188 u_argv += n;
2189 p += target_strlen(p) + 1;
2190 }
2191 put_user_ual(0, u_argv);
2192
2193 p = info->env_strings;
2194 for (i = 0; i < envc; ++i) {
2195 put_user_ual(p, u_envp);
2196 u_envp += n;
2197 p += target_strlen(p) + 1;
2198 }
2199 put_user_ual(0, u_envp);
edf8e2af 2200
d97ef72e 2201 return sp;
31e31b8a
FB		 2202}
2203
f5ef0e51
RH		 2204#if defined(HI_COMMPAGE)
2205#define LO_COMMPAGE 0
2206#elif defined(LO_COMMPAGE)
2207#define HI_COMMPAGE 0
2208#else
66346faf 2209#define HI_COMMPAGE 0
f5ef0e51 2210#define LO_COMMPAGE 0
ee947430 2211#define init_guest_commpage() true
8756e136 2212#endif
dce10401 2213
ee947430
AB		 2214static void pgb_fail_in_use(const char *image_name)
2215{
2216 error_report("%s: requires virtual address space that is in use "
2217 "(omit the -B option or choose a different value)",
2218 image_name);
2219 exit(EXIT_FAILURE);
2220}
dce10401 2221
ee947430
AB		 2222static void pgb_have_guest_base(const char *image_name, abi_ulong guest_loaddr,
2223 abi_ulong guest_hiaddr, long align)
2224{
2225 const int flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
2226 void *addr, *test;
2a53535a 2227
ee947430 2228 if (!QEMU_IS_ALIGNED(guest_base, align)) {
5ca870b9 2229 fprintf(stderr, "Requested guest base %p does not satisfy "
ee947430 2230 "host minimum alignment (0x%lx)\n",
5ca870b9 2231 (void *)guest_base, align);
ee947430
AB		 2232 exit(EXIT_FAILURE);
2233 }
2234
2235 /* Sanity check the guest binary. */
2236 if (reserved_va) {
2237 if (guest_hiaddr > reserved_va) {
2238 error_report("%s: requires more than reserved virtual "
2239 "address space (0x%" PRIx64 " > 0x%lx)",
2240 image_name, (uint64_t)guest_hiaddr, reserved_va);
2241 exit(EXIT_FAILURE);
2a53535a 2242 }
ee947430 2243 } else {
a932eec4 2244#if HOST_LONG_BITS < TARGET_ABI_BITS
ee947430
AB		 2245 if ((guest_hiaddr - guest_base) > ~(uintptr_t)0) {
2246 error_report("%s: requires more virtual address space "
2247 "than the host can provide (0x%" PRIx64 ")",
2248 image_name, (uint64_t)guest_hiaddr - guest_base);
2249 exit(EXIT_FAILURE);
2a53535a 2250 }
a932eec4 2251#endif
2a53535a 2252 }
2a53535a 2253
ee947430
AB		 2254 /*
2255 * Expand the allocation to the entire reserved_va.
2256 * Exclude the mmap_min_addr hole.
2257 */
2258 if (reserved_va) {
2259 guest_loaddr = (guest_base >= mmap_min_addr ? 0
2260 : mmap_min_addr - guest_base);
2261 guest_hiaddr = reserved_va;
2262 }
806d1021 2263
ee947430 2264 /* Reserve the address space for the binary, or reserved_va. */
3e8f1628 2265 test = g2h_untagged(guest_loaddr);
ee947430
AB		 2266 addr = mmap(test, guest_hiaddr - guest_loaddr, PROT_NONE, flags, -1, 0);
2267 if (test != addr) {
2268 pgb_fail_in_use(image_name);
2269 }
e7588237
AB		 2270 qemu_log_mask(CPU_LOG_PAGE,
2271 "%s: base @ %p for " TARGET_ABI_FMT_ld " bytes\n",
2272 __func__, addr, guest_hiaddr - guest_loaddr);
ee947430
AB		 2273}
2274
ad592e37
AB		 2275/**
2276 * pgd_find_hole_fallback: potential mmap address
2277 * @guest_size: size of available space
2278 * @brk: location of break
2279 * @align: memory alignment
2280 *
2281 * This is a fallback method for finding a hole in the host address
2282 * space if we don't have the benefit of being able to access
2283 * /proc/self/map. It can potentially take a very long time as we can
2284 * only dumbly iterate up the host address space seeing if the
2285 * allocation would work.
2286 */
5c3e87f3
AB		 2287static uintptr_t pgd_find_hole_fallback(uintptr_t guest_size, uintptr_t brk,
2288 long align, uintptr_t offset)
ad592e37
AB		 2289{
2290 uintptr_t base;
2291
2292 /* Start (aligned) at the bottom and work our way up */
2293 base = ROUND_UP(mmap_min_addr, align);
2294
2295 while (true) {
2296 uintptr_t align_start, end;
2297 align_start = ROUND_UP(base, align);
5c3e87f3 2298 end = align_start + guest_size + offset;
ad592e37
AB		 2299
2300 /* if brk is anywhere in the range give ourselves some room to grow. */
2301 if (align_start <= brk && brk < end) {
2302 base = brk + (16 * MiB);
2303 continue;
2304 } else if (align_start + guest_size < align_start) {
2305 /* we have run out of space */
2306 return -1;
2307 } else {
2667e069
AB		 2308 int flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE |
2309 MAP_FIXED_NOREPLACE;
ad592e37
AB		 2310 void * mmap_start = mmap((void *) align_start, guest_size,
2311 PROT_NONE, flags, -1, 0);
2312 if (mmap_start != MAP_FAILED) {
7e588fbc 2313 munmap(mmap_start, guest_size);
934eed51 2314 if (mmap_start == (void *) align_start) {
e7588237
AB		 2315 qemu_log_mask(CPU_LOG_PAGE,
2316 "%s: base @ %p for %" PRIdPTR" bytes\n",
2317 __func__, mmap_start + offset, guest_size);
2667e069
AB		 2318 return (uintptr_t) mmap_start + offset;
2319 }
ad592e37
AB		 2320 }
2321 base += qemu_host_page_size;
2322 }
2323 }
2324}
2325
ee947430
AB		 2326/* Return value for guest_base, or -1 if no hole found. */
2327static uintptr_t pgb_find_hole(uintptr_t guest_loaddr, uintptr_t guest_size,
5c3e87f3 2328 long align, uintptr_t offset)
ee947430
AB		 2329{
2330 GSList *maps, *iter;
2331 uintptr_t this_start, this_end, next_start, brk;
2332 intptr_t ret = -1;
2333
2334 assert(QEMU_IS_ALIGNED(guest_loaddr, align));
2335
2336 maps = read_self_maps();
dce10401 2337
ee947430
AB		 2338 /* Read brk after we've read the maps, which will malloc. */
2339 brk = (uintptr_t)sbrk(0);
2340
ad592e37 2341 if (!maps) {
190674f3 2342 return pgd_find_hole_fallback(guest_size, brk, align, offset);
ad592e37
AB		 2343 }
2344
ee947430
AB		 2345 /* The first hole is before the first map entry. */
2346 this_start = mmap_min_addr;
2347
2348 for (iter = maps; iter;
2349 this_start = next_start, iter = g_slist_next(iter)) {
2350 uintptr_t align_start, hole_size;
2351
2352 this_end = ((MapInfo *)iter->data)->start;
2353 next_start = ((MapInfo *)iter->data)->end;
5c3e87f3 2354 align_start = ROUND_UP(this_start + offset, align);
ee947430
AB		 2355
2356 /* Skip holes that are too small. */
2357 if (align_start >= this_end) {
2358 continue;
2359 }
2360 hole_size = this_end - align_start;
2361 if (hole_size < guest_size) {
2362 continue;
aac362e4
LS		 2363 }
2364
ee947430
AB		 2365 /* If this hole contains brk, give ourselves some room to grow. */
2366 if (this_start <= brk && brk < this_end) {
2367 hole_size -= guest_size;
2368 if (sizeof(uintptr_t) == 8 && hole_size >= 1 * GiB) {
2369 align_start += 1 * GiB;
2370 } else if (hole_size >= 16 * MiB) {
2371 align_start += 16 * MiB;
2372 } else {
2373 align_start = (this_end - guest_size) & -align;
2374 if (align_start < this_start) {
2375 continue;
2376 }
806d1021 2377 }
806d1021
MI		 2378 }
2379
ee947430
AB		 2380 /* Record the lowest successful match. */
2381 if (ret < 0) {
190674f3 2382 ret = align_start;
dce10401 2383 }
ee947430
AB		 2384 /* If this hole contains the identity map, select it. */
2385 if (align_start <= guest_loaddr &&
2386 guest_loaddr + guest_size <= this_end) {
2387 ret = 0;
b859040d 2388 }
ee947430
AB		 2389 /* If this hole ends above the identity map, stop looking. */
2390 if (this_end >= guest_loaddr) {
2391 break;
dce10401
MI		 2392 }
2393 }
ee947430 2394 free_self_maps(maps);
dce10401 2395
e7588237
AB		 2396 if (ret != -1) {
2397 qemu_log_mask(CPU_LOG_PAGE, "%s: base @ %" PRIxPTR
2398 " for %" PRIuPTR " bytes\n",
2399 __func__, ret, guest_size);
2400 }
2401
ee947430 2402 return ret;
dce10401
MI		 2403}
2404
ee947430
AB		 2405static void pgb_static(const char *image_name, abi_ulong orig_loaddr,
2406 abi_ulong orig_hiaddr, long align)
f3ed1f5d 2407{
ee947430
AB		 2408 uintptr_t loaddr = orig_loaddr;
2409 uintptr_t hiaddr = orig_hiaddr;
5c3e87f3 2410 uintptr_t offset = 0;
ee947430 2411 uintptr_t addr;
f3ed1f5d 2412
ee947430
AB		 2413 if (hiaddr != orig_hiaddr) {
2414 error_report("%s: requires virtual address space that the "
2415 "host cannot provide (0x%" PRIx64 ")",
2416 image_name, (uint64_t)orig_hiaddr);
2417 exit(EXIT_FAILURE);
2418 }
f3ed1f5d 2419
ee947430 2420 loaddr &= -align;
66346faf 2421 if (HI_COMMPAGE) {
ee947430
AB		 2422 /*
2423 * Extend the allocation to include the commpage.
5c3e87f3
AB		 2424 * For a 64-bit host, this is just 4GiB; for a 32-bit host we
2425 * need to ensure there is space bellow the guest_base so we
2426 * can map the commpage in the place needed when the address
2427 * arithmetic wraps around.
ee947430
AB		 2428 */
2429 if (sizeof(uintptr_t) == 8 || loaddr >= 0x80000000u) {
5c3e87f3 2430 hiaddr = (uintptr_t) 4 << 30;
f3ed1f5d 2431 } else {
66346faf 2432 offset = -(HI_COMMPAGE & -align);
f3ed1f5d 2433 }
b37778b8 2434 } else if (LO_COMMPAGE != 0) {
f5ef0e51 2435 loaddr = MIN(loaddr, LO_COMMPAGE & -align);
ee947430 2436 }
dce10401 2437
5c3e87f3 2438 addr = pgb_find_hole(loaddr, hiaddr - loaddr, align, offset);
ee947430
AB		 2439 if (addr == -1) {
2440 /*
66346faf 2441 * If HI_COMMPAGE, there *might* be a non-consecutive allocation
ee947430
AB		 2442 * that can satisfy both. But as the normal arm32 link base address
2443 * is ~32k, and we extend down to include the commpage, making the
2444 * overhead only ~96k, this is unlikely.
dce10401 2445 */
ee947430
AB		 2446 error_report("%s: Unable to allocate %#zx bytes of "
2447 "virtual address space", image_name,
2448 (size_t)(hiaddr - loaddr));
2449 exit(EXIT_FAILURE);
2450 }
2451
2452 guest_base = addr;
e7588237
AB		 2453
2454 qemu_log_mask(CPU_LOG_PAGE, "%s: base @ %"PRIxPTR" for %" PRIuPTR" bytes\n",
2455 __func__, addr, hiaddr - loaddr);
ee947430 2456}
dce10401 2457
ee947430
AB		 2458static void pgb_dynamic(const char *image_name, long align)
2459{
2460 /*
2461 * The executable is dynamic and does not require a fixed address.
2462 * All we need is a commpage that satisfies align.
2463 * If we do not need a commpage, leave guest_base == 0.
2464 */
66346faf 2465 if (HI_COMMPAGE) {
ee947430
AB		 2466 uintptr_t addr, commpage;
2467
2468 /* 64-bit hosts should have used reserved_va. */
2469 assert(sizeof(uintptr_t) == 4);
2470
2471 /*
2472 * By putting the commpage at the first hole, that puts guest_base
2473 * just above that, and maximises the positive guest addresses.
2474 */
66346faf 2475 commpage = HI_COMMPAGE & -align;
5c3e87f3 2476 addr = pgb_find_hole(commpage, -commpage, align, 0);
ee947430
AB		 2477 assert(addr != -1);
2478 guest_base = addr;
2479 }
2480}
2481
2482static void pgb_reserved_va(const char *image_name, abi_ulong guest_loaddr,
2483 abi_ulong guest_hiaddr, long align)
2484{
c1f6ad79 2485 int flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
ee947430
AB		 2486 void *addr, *test;
2487
2488 if (guest_hiaddr > reserved_va) {
2489 error_report("%s: requires more than reserved virtual "
2490 "address space (0x%" PRIx64 " > 0x%lx)",
2491 image_name, (uint64_t)guest_hiaddr, reserved_va);
2492 exit(EXIT_FAILURE);
f3ed1f5d 2493 }
f3ed1f5d 2494
ee947430
AB		 2495 /* Widen the "image" to the entire reserved address space. */
2496 pgb_static(image_name, 0, reserved_va, align);
2497
2667e069 2498 /* osdep.h defines this as 0 if it's missing */
c1f6ad79 2499 flags |= MAP_FIXED_NOREPLACE;
c1f6ad79 2500
ee947430
AB		 2501 /* Reserve the memory on the host. */
2502 assert(guest_base != 0);
3e8f1628 2503 test = g2h_untagged(0);
ee947430 2504 addr = mmap(test, reserved_va, PROT_NONE, flags, -1, 0);
fb730c86 2505 if (addr == MAP_FAILED || addr != test) {
ee947430 2506 error_report("Unable to reserve 0x%lx bytes of virtual address "
87966743 2507 "space at %p (%s) for use as guest address space (check your "
fb730c86
AB		 2508 "virtual memory ulimit setting, min_mmap_addr or reserve less "
2509 "using -R option)", reserved_va, test, strerror(errno));
ee947430
AB		 2510 exit(EXIT_FAILURE);
2511 }
e7588237
AB		 2512
2513 qemu_log_mask(CPU_LOG_PAGE, "%s: base @ %p for %lu bytes\n",
2514 __func__, addr, reserved_va);
f3ed1f5d
PM		 2515}
2516
ee947430
AB		 2517void probe_guest_base(const char *image_name, abi_ulong guest_loaddr,
2518 abi_ulong guest_hiaddr)
2519{
2520 /* In order to use host shmat, we must be able to honor SHMLBA. */
2521 uintptr_t align = MAX(SHMLBA, qemu_host_page_size);
2522
2523 if (have_guest_base) {
2524 pgb_have_guest_base(image_name, guest_loaddr, guest_hiaddr, align);
2525 } else if (reserved_va) {
2526 pgb_reserved_va(image_name, guest_loaddr, guest_hiaddr, align);
2527 } else if (guest_loaddr) {
2528 pgb_static(image_name, guest_loaddr, guest_hiaddr, align);
2529 } else {
2530 pgb_dynamic(image_name, align);
2531 }
2532
2533 /* Reserve and initialize the commpage. */
2534 if (!init_guest_commpage()) {
2535 /*
2536 * With have_guest_base, the user has selected the address and
2537 * we are trying to work with that. Otherwise, we have selected
2538 * free space and init_guest_commpage must succeeded.
2539 */
2540 assert(have_guest_base);
2541 pgb_fail_in_use(image_name);
2542 }
2543
2544 assert(QEMU_IS_ALIGNED(guest_base, align));
2545 qemu_log_mask(CPU_LOG_PAGE, "Locating guest address space "
2546 "@ 0x%" PRIx64 "\n", (uint64_t)guest_base);
2547}
f3ed1f5d 2548
83f990eb
RH		 2549enum {
2550 /* The string "GNU\0" as a magic number. */
2551 GNU0_MAGIC = const_le32('G' | 'N' << 8 | 'U' << 16),
2552 NOTE_DATA_SZ = 1 * KiB,
2553 NOTE_NAME_SZ = 4,
2554 ELF_GNU_PROPERTY_ALIGN = ELF_CLASS == ELFCLASS32 ? 4 : 8,
2555};
2556
2557/*
2558 * Process a single gnu_property entry.
2559 * Return false for error.
2560 */
2561static bool parse_elf_property(const uint32_t *data, int *off, int datasz,
2562 struct image_info *info, bool have_prev_type,
2563 uint32_t *prev_type, Error **errp)
2564{
2565 uint32_t pr_type, pr_datasz, step;
2566
2567 if (*off > datasz || !QEMU_IS_ALIGNED(*off, ELF_GNU_PROPERTY_ALIGN)) {
2568 goto error_data;
2569 }
2570 datasz -= *off;
2571 data += *off / sizeof(uint32_t);
2572
2573 if (datasz < 2 * sizeof(uint32_t)) {
2574 goto error_data;
2575 }
2576 pr_type = data[0];
2577 pr_datasz = data[1];
2578 data += 2;
2579 datasz -= 2 * sizeof(uint32_t);
2580 step = ROUND_UP(pr_datasz, ELF_GNU_PROPERTY_ALIGN);
2581 if (step > datasz) {
2582 goto error_data;
2583 }
2584
2585 /* Properties are supposed to be unique and sorted on pr_type. */
2586 if (have_prev_type && pr_type <= *prev_type) {
2587 if (pr_type == *prev_type) {
2588 error_setg(errp, "Duplicate property in PT_GNU_PROPERTY");
2589 } else {
2590 error_setg(errp, "Unsorted property in PT_GNU_PROPERTY");
2591 }
2592 return false;
2593 }
2594 *prev_type = pr_type;
2595
2596 if (!arch_parse_elf_property(pr_type, pr_datasz, data, info, errp)) {
2597 return false;
2598 }
2599
2600 *off += 2 * sizeof(uint32_t) + step;
2601 return true;
2602
2603 error_data:
2604 error_setg(errp, "Ill-formed property in PT_GNU_PROPERTY");
2605 return false;
2606}
2607
2608/* Process NT_GNU_PROPERTY_TYPE_0. */
2609static bool parse_elf_properties(int image_fd,
2610 struct image_info *info,
2611 const struct elf_phdr *phdr,
2612 char bprm_buf[BPRM_BUF_SIZE],
2613 Error **errp)
2614{
2615 union {
2616 struct elf_note nhdr;
2617 uint32_t data[NOTE_DATA_SZ / sizeof(uint32_t)];
2618 } note;
2619
2620 int n, off, datasz;
2621 bool have_prev_type;
2622 uint32_t prev_type;
2623
2624 /* Unless the arch requires properties, ignore them. */
2625 if (!ARCH_USE_GNU_PROPERTY) {
2626 return true;
2627 }
2628
2629 /* If the properties are crazy large, that's too bad. */
2630 n = phdr->p_filesz;
2631 if (n > sizeof(note)) {
2632 error_setg(errp, "PT_GNU_PROPERTY too large");
2633 return false;
2634 }
2635 if (n < sizeof(note.nhdr)) {
2636 error_setg(errp, "PT_GNU_PROPERTY too small");
2637 return false;
2638 }
2639
2640 if (phdr->p_offset + n <= BPRM_BUF_SIZE) {
2641 memcpy(&note, bprm_buf + phdr->p_offset, n);
2642 } else {
2643 ssize_t len = pread(image_fd, &note, n, phdr->p_offset);
2644 if (len != n) {
2645 error_setg_errno(errp, errno, "Error reading file header");
2646 return false;
2647 }
2648 }
2649
2650 /*
2651 * The contents of a valid PT_GNU_PROPERTY is a sequence
2652 * of uint32_t -- swap them all now.
2653 */
2654#ifdef BSWAP_NEEDED
2655 for (int i = 0; i < n / 4; i++) {
2656 bswap32s(note.data + i);
2657 }
2658#endif
2659
2660 /*
2661 * Note that nhdr is 3 words, and that the "name" described by namesz
2662 * immediately follows nhdr and is thus at the 4th word. Further, all
2663 * of the inputs to the kernel's round_up are multiples of 4.
2664 */
2665 if (note.nhdr.n_type != NT_GNU_PROPERTY_TYPE_0 ||
2666 note.nhdr.n_namesz != NOTE_NAME_SZ ||
2667 note.data[3] != GNU0_MAGIC) {
2668 error_setg(errp, "Invalid note in PT_GNU_PROPERTY");
2669 return false;
2670 }
2671 off = sizeof(note.nhdr) + NOTE_NAME_SZ;
2672
2673 datasz = note.nhdr.n_descsz + off;
2674 if (datasz > n) {
2675 error_setg(errp, "Invalid note size in PT_GNU_PROPERTY");
2676 return false;
2677 }
2678
2679 have_prev_type = false;
2680 prev_type = 0;
2681 while (1) {
2682 if (off == datasz) {
2683 return true; /* end, exit ok */
2684 }
2685 if (!parse_elf_property(note.data, &off, datasz, info,
2686 have_prev_type, &prev_type, errp)) {
2687 return false;
2688 }
2689 have_prev_type = true;
2690 }
2691}
2692
8e62a717 2693/* Load an ELF image into the address space.
31e31b8a 2694
8e62a717
RH		 2695 IMAGE_NAME is the filename of the image, to use in error messages.
2696 IMAGE_FD is the open file descriptor for the image.
2697
2698 BPRM_BUF is a copy of the beginning of the file; this of course
2699 contains the elf file header at offset 0. It is assumed that this
2700 buffer is sufficiently aligned to present no problems to the host
2701 in accessing data at aligned offsets within the buffer.
2702
2703 On return: INFO values will be filled in, as necessary or available. */
2704
2705static void load_elf_image(const char *image_name, int image_fd,
bf858897 2706 struct image_info *info, char **pinterp_name,
8e62a717 2707 char bprm_buf[BPRM_BUF_SIZE])
31e31b8a 2708{
8e62a717
RH		 2709 struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
2710 struct elf_phdr *phdr;
2711 abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
e8384b37 2712 int i, retval, prot_exec;
c7f17e7b 2713 Error *err = NULL;
5fafdf24 2714
8e62a717 2715 /* First of all, some simple consistency checks */
8e62a717 2716 if (!elf_check_ident(ehdr)) {
c7f17e7b 2717 error_setg(&err, "Invalid ELF image for this architecture");
8e62a717
RH		 2718 goto exit_errmsg;
2719 }
2720 bswap_ehdr(ehdr);
2721 if (!elf_check_ehdr(ehdr)) {
c7f17e7b 2722 error_setg(&err, "Invalid ELF image for this architecture");
8e62a717 2723 goto exit_errmsg;
d97ef72e 2724 }
5fafdf24 2725
8e62a717
RH		 2726 i = ehdr->e_phnum * sizeof(struct elf_phdr);
2727 if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
2728 phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
9955ffac 2729 } else {
8e62a717
RH		 2730 phdr = (struct elf_phdr *) alloca(i);
2731 retval = pread(image_fd, phdr, i, ehdr->e_phoff);
9955ffac 2732 if (retval != i) {
8e62a717 2733 goto exit_read;
9955ffac 2734 }
d97ef72e 2735 }
8e62a717 2736 bswap_phdr(phdr, ehdr->e_phnum);
09bfb054 2737
1af02e83
MF		 2738 info->nsegs = 0;
2739 info->pt_dynamic_addr = 0;
1af02e83 2740
98c1076c
AB		 2741 mmap_lock();
2742
8a1a5274
RH		 2743 /*
2744 * Find the maximum size of the image and allocate an appropriate
2745 * amount of memory to handle that. Locate the interpreter, if any.
2746 */
682674b8 2747 loaddr = -1, hiaddr = 0;
33143c44 2748 info->alignment = 0;
8e62a717 2749 for (i = 0; i < ehdr->e_phnum; ++i) {
4d9d535a
RH		 2750 struct elf_phdr *eppnt = phdr + i;
2751 if (eppnt->p_type == PT_LOAD) {
2752 abi_ulong a = eppnt->p_vaddr - eppnt->p_offset;
682674b8
RH		 2753 if (a < loaddr) {
2754 loaddr = a;
2755 }
4d9d535a 2756 a = eppnt->p_vaddr + eppnt->p_memsz;
682674b8
RH		 2757 if (a > hiaddr) {
2758 hiaddr = a;
2759 }
1af02e83 2760 ++info->nsegs;
4d9d535a 2761 info->alignment |= eppnt->p_align;
8a1a5274
RH		 2762 } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
2763 g_autofree char *interp_name = NULL;
2764
2765 if (*pinterp_name) {
c7f17e7b 2766 error_setg(&err, "Multiple PT_INTERP entries");
8a1a5274
RH		 2767 goto exit_errmsg;
2768 }
c7f17e7b 2769
8a1a5274 2770 interp_name = g_malloc(eppnt->p_filesz);
8a1a5274
RH		 2771
2772 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2773 memcpy(interp_name, bprm_buf + eppnt->p_offset,
2774 eppnt->p_filesz);
2775 } else {
2776 retval = pread(image_fd, interp_name, eppnt->p_filesz,
2777 eppnt->p_offset);
2778 if (retval != eppnt->p_filesz) {
c7f17e7b 2779 goto exit_read;
8a1a5274
RH		 2780 }
2781 }
2782 if (interp_name[eppnt->p_filesz - 1] != 0) {
c7f17e7b 2783 error_setg(&err, "Invalid PT_INTERP entry");
8a1a5274
RH		 2784 goto exit_errmsg;
2785 }
2786 *pinterp_name = g_steal_pointer(&interp_name);
83f990eb
RH		 2787 } else if (eppnt->p_type == PT_GNU_PROPERTY) {
2788 if (!parse_elf_properties(image_fd, info, eppnt, bprm_buf, &err)) {
2789 goto exit_errmsg;
2790 }
682674b8
RH		 2791 }
2792 }
2793
6fd59449
RH		 2794 if (pinterp_name != NULL) {
2795 /*
2796 * This is the main executable.
2797 *
2798 * Reserve extra space for brk.
2799 * We hold on to this space while placing the interpreter
2800 * and the stack, lest they be placed immediately after
2801 * the data segment and block allocation from the brk.
2802 *
11d36727
AB		 2803 * 16MB is chosen as "large enough" without being so large as
2804 * to allow the result to not fit with a 32-bit guest on a
2805 * 32-bit host. However some 64 bit guests (e.g. s390x)
2806 * attempt to place their heap further ahead and currently
2807 * nothing stops them smashing into QEMUs address space.
6fd59449 2808 */
11d36727
AB		 2809#if TARGET_LONG_BITS == 64
2810 info->reserve_brk = 32 * MiB;
2811#else
6fd59449 2812 info->reserve_brk = 16 * MiB;
11d36727 2813#endif
6fd59449
RH		 2814 hiaddr += info->reserve_brk;
2815
2816 if (ehdr->e_type == ET_EXEC) {
2817 /*
2818 * Make sure that the low address does not conflict with
2819 * MMAP_MIN_ADDR or the QEMU application itself.
2820 */
2821 probe_guest_base(image_name, loaddr, hiaddr);
ee947430
AB		 2822 } else {
2823 /*
2824 * The binary is dynamic, but we still need to
2825 * select guest_base. In this case we pass a size.
2826 */
2827 probe_guest_base(image_name, 0, hiaddr - loaddr);
d97ef72e 2828 }
6fd59449
RH		 2829 }
2830
2831 /*
2832 * Reserve address space for all of this.
2833 *
2834 * In the case of ET_EXEC, we supply MAP_FIXED so that we get
2835 * exactly the address range that is required.
2836 *
2837 * Otherwise this is ET_DYN, and we are searching for a location
2838 * that can hold the memory space required. If the image is
2839 * pre-linked, LOADDR will be non-zero, and the kernel should
2840 * honor that address if it happens to be free.
2841 *
2842 * In both cases, we will overwrite pages in this range with mappings
2843 * from the executable.
2844 */
2845 load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
2846 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE |
2847 (ehdr->e_type == ET_EXEC ? MAP_FIXED : 0),
2848 -1, 0);
2849 if (load_addr == -1) {
c7f17e7b 2850 goto exit_mmap;
d97ef72e 2851 }
682674b8 2852 load_bias = load_addr - loaddr;
d97ef72e 2853
a99856cd 2854 if (elf_is_fdpic(ehdr)) {
1af02e83 2855 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs =
7267c094 2856 g_malloc(sizeof(*loadsegs) * info->nsegs);
1af02e83
MF		 2857
2858 for (i = 0; i < ehdr->e_phnum; ++i) {
2859 switch (phdr[i].p_type) {
2860 case PT_DYNAMIC:
2861 info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias;
2862 break;
2863 case PT_LOAD:
2864 loadsegs->addr = phdr[i].p_vaddr + load_bias;
2865 loadsegs->p_vaddr = phdr[i].p_vaddr;
2866 loadsegs->p_memsz = phdr[i].p_memsz;
2867 ++loadsegs;
2868 break;
2869 }
2870 }
2871 }
1af02e83 2872
8e62a717 2873 info->load_bias = load_bias;
dc12567a
JK		 2874 info->code_offset = load_bias;
2875 info->data_offset = load_bias;
8e62a717
RH		 2876 info->load_addr = load_addr;
2877 info->entry = ehdr->e_entry + load_bias;
2878 info->start_code = -1;
2879 info->end_code = 0;
2880 info->start_data = -1;
2881 info->end_data = 0;
2882 info->brk = 0;
d8fd2954 2883 info->elf_flags = ehdr->e_flags;
8e62a717 2884
e8384b37
RH		 2885 prot_exec = PROT_EXEC;
2886#ifdef TARGET_AARCH64
2887 /*
2888 * If the BTI feature is present, this indicates that the executable
2889 * pages of the startup binary should be mapped with PROT_BTI, so that
2890 * branch targets are enforced.
2891 *
2892 * The startup binary is either the interpreter or the static executable.
2893 * The interpreter is responsible for all pages of a dynamic executable.
2894 *
2895 * Elf notes are backward compatible to older cpus.
2896 * Do not enable BTI unless it is supported.
2897 */
2898 if ((info->note_flags & GNU_PROPERTY_AARCH64_FEATURE_1_BTI)
2899 && (pinterp_name == NULL || *pinterp_name == 0)
2900 && cpu_isar_feature(aa64_bti, ARM_CPU(thread_cpu))) {
2901 prot_exec |= TARGET_PROT_BTI;
2902 }
2903#endif
2904
8e62a717
RH		 2905 for (i = 0; i < ehdr->e_phnum; i++) {
2906 struct elf_phdr *eppnt = phdr + i;
d97ef72e 2907 if (eppnt->p_type == PT_LOAD) {
94894ff2 2908 abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em, vaddr_len;
d97ef72e 2909 int elf_prot = 0;
d97ef72e 2910
e5eaf570
RH		 2911 if (eppnt->p_flags & PF_R) {
2912 elf_prot |= PROT_READ;
2913 }
2914 if (eppnt->p_flags & PF_W) {
2915 elf_prot |= PROT_WRITE;
2916 }
2917 if (eppnt->p_flags & PF_X) {
e8384b37 2918 elf_prot |= prot_exec;
e5eaf570 2919 }
d97ef72e 2920
682674b8
RH		 2921 vaddr = load_bias + eppnt->p_vaddr;
2922 vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
2923 vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
22d113b5
GM		 2924
2925 vaddr_ef = vaddr + eppnt->p_filesz;
2926 vaddr_em = vaddr + eppnt->p_memsz;
682674b8 2927
d87146bc 2928 /*
22d113b5
GM		 2929 * Some segments may be completely empty, with a non-zero p_memsz
2930 * but no backing file segment.
d87146bc
GM		 2931 */
2932 if (eppnt->p_filesz != 0) {
22d113b5 2933 vaddr_len = TARGET_ELF_PAGELENGTH(eppnt->p_filesz + vaddr_po);
d87146bc
GM		 2934 error = target_mmap(vaddr_ps, vaddr_len, elf_prot,
2935 MAP_PRIVATE | MAP_FIXED,
2936 image_fd, eppnt->p_offset - vaddr_po);
2937
2938 if (error == -1) {
c7f17e7b 2939 goto exit_mmap;
d87146bc 2940 }
09bfb054 2941
22d113b5
GM		 2942 /*
2943 * If the load segment requests extra zeros (e.g. bss), map it.
2944 */
2945 if (eppnt->p_filesz < eppnt->p_memsz) {
2946 zero_bss(vaddr_ef, vaddr_em, elf_prot);
2947 }
2948 } else if (eppnt->p_memsz != 0) {
2949 vaddr_len = TARGET_ELF_PAGELENGTH(eppnt->p_memsz + vaddr_po);
2950 error = target_mmap(vaddr_ps, vaddr_len, elf_prot,
2951 MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS,
2952 -1, 0);
31e31b8a 2953
22d113b5
GM		 2954 if (error == -1) {
2955 goto exit_mmap;
2956 }
cf129f3a 2957 }
8e62a717
RH		 2958
2959 /* Find the full program boundaries. */
2960 if (elf_prot & PROT_EXEC) {
2961 if (vaddr < info->start_code) {
2962 info->start_code = vaddr;
2963 }
2964 if (vaddr_ef > info->end_code) {
2965 info->end_code = vaddr_ef;
2966 }
2967 }
2968 if (elf_prot & PROT_WRITE) {
2969 if (vaddr < info->start_data) {
2970 info->start_data = vaddr;
2971 }
2972 if (vaddr_ef > info->end_data) {
2973 info->end_data = vaddr_ef;
2974 }
8a045188
TB		 2975 }
2976 if (vaddr_em > info->brk) {
2977 info->brk = vaddr_em;
8e62a717 2978 }
5dd0db52
SM		 2979#ifdef TARGET_MIPS
2980 } else if (eppnt->p_type == PT_MIPS_ABIFLAGS) {
2981 Mips_elf_abiflags_v0 abiflags;
2982 if (eppnt->p_filesz < sizeof(Mips_elf_abiflags_v0)) {
c7f17e7b 2983 error_setg(&err, "Invalid PT_MIPS_ABIFLAGS entry");
5dd0db52
SM		 2984 goto exit_errmsg;
2985 }
2986 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2987 memcpy(&abiflags, bprm_buf + eppnt->p_offset,
2988 sizeof(Mips_elf_abiflags_v0));
2989 } else {
2990 retval = pread(image_fd, &abiflags, sizeof(Mips_elf_abiflags_v0),
2991 eppnt->p_offset);
2992 if (retval != sizeof(Mips_elf_abiflags_v0)) {
c7f17e7b 2993 goto exit_read;
5dd0db52
SM		 2994 }
2995 }
2996 bswap_mips_abiflags(&abiflags);
c94cb6c9 2997 info->fp_abi = abiflags.fp_abi;
5dd0db52 2998#endif
d97ef72e 2999 }
682674b8 3000 }
5fafdf24 3001
8e62a717
RH		 3002 if (info->end_data == 0) {
3003 info->start_data = info->end_code;
3004 info->end_data = info->end_code;
8e62a717
RH		 3005 }
3006
682674b8 3007 if (qemu_log_enabled()) {
8e62a717 3008 load_symbols(ehdr, image_fd, load_bias);
682674b8 3009 }
31e31b8a 3010
98c1076c
AB		 3011 mmap_unlock();
3012
8e62a717
RH		 3013 close(image_fd);
3014 return;
3015
3016 exit_read:
3017 if (retval >= 0) {
c7f17e7b
RH		 3018 error_setg(&err, "Incomplete read of file header");
3019 } else {
3020 error_setg_errno(&err, errno, "Error reading file header");
8e62a717 3021 }
c7f17e7b
RH		 3022 goto exit_errmsg;
3023 exit_mmap:
3024 error_setg_errno(&err, errno, "Error mapping file");
3025 goto exit_errmsg;
8e62a717 3026 exit_errmsg:
c7f17e7b 3027 error_reportf_err(err, "%s: ", image_name);
8e62a717
RH		 3028 exit(-1);
3029}
3030
3031static void load_elf_interp(const char *filename, struct image_info *info,
3032 char bprm_buf[BPRM_BUF_SIZE])
3033{
3034 int fd, retval;
808f6563 3035 Error *err = NULL;
8e62a717
RH		 3036
3037 fd = open(path(filename), O_RDONLY);
3038 if (fd < 0) {
808f6563
RH		 3039 error_setg_file_open(&err, errno, filename);
3040 error_report_err(err);
3041 exit(-1);
8e62a717 3042 }
31e31b8a 3043
8e62a717
RH		 3044 retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
3045 if (retval < 0) {
808f6563
RH		 3046 error_setg_errno(&err, errno, "Error reading file header");
3047 error_reportf_err(err, "%s: ", filename);
3048 exit(-1);
8e62a717 3049 }
808f6563 3050
8e62a717
RH		 3051 if (retval < BPRM_BUF_SIZE) {
3052 memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
3053 }
3054
bf858897 3055 load_elf_image(filename, fd, info, NULL, bprm_buf);
31e31b8a
FB		 3056}
3057
49918a75
PB		 3058static int symfind(const void *s0, const void *s1)
3059{
c7c530cd 3060 target_ulong addr = *(target_ulong *)s0;
49918a75
PB		 3061 struct elf_sym *sym = (struct elf_sym *)s1;
3062 int result = 0;
c7c530cd 3063 if (addr < sym->st_value) {
49918a75 3064 result = -1;
c7c530cd 3065 } else if (addr >= sym->st_value + sym->st_size) {
49918a75
PB		 3066 result = 1;
3067 }
3068 return result;
3069}
3070
3071static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
3072{
3073#if ELF_CLASS == ELFCLASS32
3074 struct elf_sym *syms = s->disas_symtab.elf32;
3075#else
3076 struct elf_sym *syms = s->disas_symtab.elf64;
3077#endif
3078
3079 // binary search
49918a75
PB		 3080 struct elf_sym *sym;
3081
c7c530cd 3082 sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind);
7cba04f6 3083 if (sym != NULL) {
49918a75
PB		 3084 return s->disas_strtab + sym->st_name;
3085 }
3086
3087 return "";
3088}
3089
3090/* FIXME: This should use elf_ops.h */
3091static int symcmp(const void *s0, const void *s1)
3092{
3093 struct elf_sym *sym0 = (struct elf_sym *)s0;
3094 struct elf_sym *sym1 = (struct elf_sym *)s1;
3095 return (sym0->st_value < sym1->st_value)
3096 ? -1
3097 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
3098}
3099
689f936f 3100/* Best attempt to load symbols from this ELF object. */
682674b8 3101static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
689f936f 3102{
682674b8 3103 int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
1e06262d 3104 uint64_t segsz;
682674b8 3105 struct elf_shdr *shdr;
b9475279
CV		 3106 char *strings = NULL;
3107 struct syminfo *s = NULL;
3108 struct elf_sym *new_syms, *syms = NULL;
689f936f 3109
682674b8
RH		 3110 shnum = hdr->e_shnum;
3111 i = shnum * sizeof(struct elf_shdr);
3112 shdr = (struct elf_shdr *)alloca(i);
3113 if (pread(fd, shdr, i, hdr->e_shoff) != i) {
3114 return;
3115 }
3116
3117 bswap_shdr(shdr, shnum);
3118 for (i = 0; i < shnum; ++i) {
3119 if (shdr[i].sh_type == SHT_SYMTAB) {
3120 sym_idx = i;
3121 str_idx = shdr[i].sh_link;
49918a75
PB		 3122 goto found;
3123 }
689f936f 3124 }
682674b8
RH		 3125
3126 /* There will be no symbol table if the file was stripped. */
3127 return;
689f936f
FB		 3128
3129 found:
682674b8 3130 /* Now know where the strtab and symtab are. Snarf them. */
0ef9ea29 3131 s = g_try_new(struct syminfo, 1);
682674b8 3132 if (!s) {
b9475279 3133 goto give_up;
682674b8 3134 }
5fafdf24 3135
1e06262d
PM		 3136 segsz = shdr[str_idx].sh_size;
3137 s->disas_strtab = strings = g_try_malloc(segsz);
3138 if (!strings ||
3139 pread(fd, strings, segsz, shdr[str_idx].sh_offset) != segsz) {
b9475279 3140 goto give_up;
682674b8 3141 }
49918a75 3142
1e06262d
PM		 3143 segsz = shdr[sym_idx].sh_size;
3144 syms = g_try_malloc(segsz);
3145 if (!syms || pread(fd, syms, segsz, shdr[sym_idx].sh_offset) != segsz) {
b9475279 3146 goto give_up;
682674b8 3147 }
31e31b8a 3148
1e06262d
PM		 3149 if (segsz / sizeof(struct elf_sym) > INT_MAX) {
3150 /* Implausibly large symbol table: give up rather than ploughing
3151 * on with the number of symbols calculation overflowing
3152 */
3153 goto give_up;
3154 }
3155 nsyms = segsz / sizeof(struct elf_sym);
682674b8 3156 for (i = 0; i < nsyms; ) {
49918a75 3157 bswap_sym(syms + i);
682674b8
RH		 3158 /* Throw away entries which we do not need. */
3159 if (syms[i].st_shndx == SHN_UNDEF
3160 || syms[i].st_shndx >= SHN_LORESERVE
3161 || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
3162 if (i < --nsyms) {
49918a75
PB		 3163 syms[i] = syms[nsyms];
3164 }
682674b8 3165 } else {
49918a75 3166#if defined(TARGET_ARM) || defined (TARGET_MIPS)
682674b8
RH		 3167 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
3168 syms[i].st_value &= ~(target_ulong)1;
0774bed1 3169#endif
682674b8
RH		 3170 syms[i].st_value += load_bias;
3171 i++;
3172 }
0774bed1 3173 }
49918a75 3174
b9475279
CV		 3175 /* No "useful" symbol. */
3176 if (nsyms == 0) {
3177 goto give_up;
3178 }
3179
5d5c9930
RH		 3180 /* Attempt to free the storage associated with the local symbols
3181 that we threw away. Whether or not this has any effect on the
3182 memory allocation depends on the malloc implementation and how
3183 many symbols we managed to discard. */
0ef9ea29 3184 new_syms = g_try_renew(struct elf_sym, syms, nsyms);
8d79de6e 3185 if (new_syms == NULL) {
b9475279 3186 goto give_up;
5d5c9930 3187 }
8d79de6e 3188 syms = new_syms;
5d5c9930 3189
49918a75 3190 qsort(syms, nsyms, sizeof(*syms), symcmp);
689f936f 3191
49918a75
PB		 3192 s->disas_num_syms = nsyms;
3193#if ELF_CLASS == ELFCLASS32
3194 s->disas_symtab.elf32 = syms;
49918a75
PB		 3195#else
3196 s->disas_symtab.elf64 = syms;
49918a75 3197#endif
682674b8 3198 s->lookup_symbol = lookup_symbolxx;
e80cfcfc
FB		 3199 s->next = syminfos;
3200 syminfos = s;
b9475279
CV		 3201
3202 return;
3203
3204give_up:
0ef9ea29
PM		 3205 g_free(s);
3206 g_free(strings);
3207 g_free(syms);
689f936f 3208}
31e31b8a 3209
768fe76e
YS		 3210uint32_t get_elf_eflags(int fd)
3211{
3212 struct elfhdr ehdr;
3213 off_t offset;
3214 int ret;
3215
3216 /* Read ELF header */
3217 offset = lseek(fd, 0, SEEK_SET);
3218 if (offset == (off_t) -1) {
3219 return 0;
3220 }
3221 ret = read(fd, &ehdr, sizeof(ehdr));
3222 if (ret < sizeof(ehdr)) {
3223 return 0;
3224 }
3225 offset = lseek(fd, offset, SEEK_SET);
3226 if (offset == (off_t) -1) {
3227 return 0;
3228 }
3229
3230 /* Check ELF signature */
3231 if (!elf_check_ident(&ehdr)) {
3232 return 0;
3233 }
3234
3235 /* check header */
3236 bswap_ehdr(&ehdr);
3237 if (!elf_check_ehdr(&ehdr)) {
3238 return 0;
3239 }
3240
3241 /* return architecture id */
3242 return ehdr.e_flags;
3243}
3244
f0116c54 3245int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
31e31b8a 3246{
8e62a717 3247 struct image_info interp_info;
31e31b8a 3248 struct elfhdr elf_ex;
8e62a717 3249 char *elf_interpreter = NULL;
59baae9a 3250 char *scratch;
31e31b8a 3251
abcac736
DS		 3252 memset(&interp_info, 0, sizeof(interp_info));
3253#ifdef TARGET_MIPS
3254 interp_info.fp_abi = MIPS_ABI_FP_UNKNOWN;
3255#endif
3256
bf858897 3257 info->start_mmap = (abi_ulong)ELF_START_MMAP;
bf858897
RH		 3258
3259 load_elf_image(bprm->filename, bprm->fd, info,
3260 &elf_interpreter, bprm->buf);
31e31b8a 3261
bf858897
RH		 3262 /* ??? We need a copy of the elf header for passing to create_elf_tables.
3263 If we do nothing, we'll have overwritten this when we re-use bprm->buf
3264 when we load the interpreter. */
3265 elf_ex = *(struct elfhdr *)bprm->buf;
31e31b8a 3266
59baae9a
SB		 3267 /* Do this so that we can load the interpreter, if need be. We will
3268 change some of these later */
3269 bprm->p = setup_arg_pages(bprm, info);
3270
3271 scratch = g_new0(char, TARGET_PAGE_SIZE);
7c4ee5bc
RH		 3272 if (STACK_GROWS_DOWN) {
3273 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
3274 bprm->p, info->stack_limit);
3275 info->file_string = bprm->p;
3276 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
3277 bprm->p, info->stack_limit);
3278 info->env_strings = bprm->p;
3279 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
3280 bprm->p, info->stack_limit);
3281 info->arg_strings = bprm->p;
3282 } else {
3283 info->arg_strings = bprm->p;
3284 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
3285 bprm->p, info->stack_limit);
3286 info->env_strings = bprm->p;
3287 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
3288 bprm->p, info->stack_limit);
3289 info->file_string = bprm->p;
3290 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
3291 bprm->p, info->stack_limit);
3292 }
3293
59baae9a
SB		 3294 g_free(scratch);
3295
e5fe0c52 3296 if (!bprm->p) {
bf858897
RH		 3297 fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
3298 exit(-1);
379f6698 3299 }
379f6698 3300
8e62a717
RH		 3301 if (elf_interpreter) {
3302 load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
31e31b8a 3303
8e62a717
RH		 3304 /* If the program interpreter is one of these two, then assume
3305 an iBCS2 image. Otherwise assume a native linux image. */
3306
3307 if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
3308 || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
3309 info->personality = PER_SVR4;
31e31b8a 3310
8e62a717
RH		 3311 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
3312 and some applications "depend" upon this behavior. Since
3313 we do not have the power to recompile these, we emulate
3314 the SVr4 behavior. Sigh. */
3315 target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
68754b44 3316 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
8e62a717 3317 }
c94cb6c9
SM		 3318#ifdef TARGET_MIPS
3319 info->interp_fp_abi = interp_info.fp_abi;
3320#endif
31e31b8a
FB		 3321 }
3322
db2af69d
RH		 3323 /*
3324 * TODO: load a vdso, which would also contain the signal trampolines.
3325 * Otherwise, allocate a private page to hold them.
3326 */
3327 if (TARGET_ARCH_HAS_SIGTRAMP_PAGE) {
802ae45e
LV		 3328 abi_long tramp_page = target_mmap(0, TARGET_PAGE_SIZE,
3329 PROT_READ | PROT_WRITE,
3330 MAP_PRIVATE | MAP_ANON, -1, 0);
3331 if (tramp_page == -1) {
3332 return -errno;
3333 }
3334
db2af69d
RH		 3335 setup_sigtramp(tramp_page);
3336 target_mprotect(tramp_page, TARGET_PAGE_SIZE, PROT_READ | PROT_EXEC);
3337 }
3338
8e62a717
RH		 3339 bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
3340 info, (elf_interpreter ? &interp_info : NULL));
3341 info->start_stack = bprm->p;
3342
3343 /* If we have an interpreter, set that as the program's entry point.
8e78064e 3344 Copy the load_bias as well, to help PPC64 interpret the entry
8e62a717
RH		 3345 point as a function descriptor. Do this after creating elf tables
3346 so that we copy the original program entry point into the AUXV. */
3347 if (elf_interpreter) {
8e78064e 3348 info->load_bias = interp_info.load_bias;
8e62a717 3349 info->entry = interp_info.entry;
2b323087 3350 g_free(elf_interpreter);
8e62a717 3351 }
31e31b8a 3352
edf8e2af
MW		 3353#ifdef USE_ELF_CORE_DUMP
3354 bprm->core_dump = &elf_core_dump;
3355#endif
3356
6fd59449
RH		 3357 /*
3358 * If we reserved extra space for brk, release it now.
3359 * The implementation of do_brk in syscalls.c expects to be able
3360 * to mmap pages in this space.
3361 */
3362 if (info->reserve_brk) {
3363 abi_ulong start_brk = HOST_PAGE_ALIGN(info->brk);
3364 abi_ulong end_brk = HOST_PAGE_ALIGN(info->brk + info->reserve_brk);
3365 target_munmap(start_brk, end_brk - start_brk);
3366 }
3367
31e31b8a
FB		 3368 return 0;
3369}
3370
edf8e2af 3371#ifdef USE_ELF_CORE_DUMP
edf8e2af
MW		 3372/*
3373 * Definitions to generate Intel SVR4-like core files.
a2547a13 3374 * These mostly have the same names as the SVR4 types with "target_elf_"
edf8e2af
MW		 3375 * tacked on the front to prevent clashes with linux definitions,
3376 * and the typedef forms have been avoided. This is mostly like
3377 * the SVR4 structure, but more Linuxy, with things that Linux does
3378 * not support and which gdb doesn't really use excluded.
3379 *
3380 * Fields we don't dump (their contents is zero) in linux-user qemu
3381 * are marked with XXX.
3382 *
3383 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
3384 *
3385 * Porting ELF coredump for target is (quite) simple process. First you
dd0a3651 3386 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
edf8e2af
MW		 3387 * the target resides):
3388 *
3389 * #define USE_ELF_CORE_DUMP
3390 *
3391 * Next you define type of register set used for dumping. ELF specification
3392 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
3393 *
c227f099 3394 * typedef <target_regtype> target_elf_greg_t;
edf8e2af 3395 * #define ELF_NREG <number of registers>
c227f099 3396 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 3397 *
edf8e2af
MW		 3398 * Last step is to implement target specific function that copies registers
3399 * from given cpu into just specified register set. Prototype is:
3400 *
c227f099 3401 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
9349b4f9 3402 * const CPUArchState *env);
edf8e2af
MW		 3403 *
3404 * Parameters:
3405 * regs - copy register values into here (allocated and zeroed by caller)
3406 * env - copy registers from here
3407 *
3408 * Example for ARM target is provided in this file.
3409 */
3410
3411/* An ELF note in memory */
3412struct memelfnote {
3413 const char *name;
3414 size_t namesz;
3415 size_t namesz_rounded;
3416 int type;
3417 size_t datasz;
80f5ce75 3418 size_t datasz_rounded;
edf8e2af
MW		 3419 void *data;
3420 size_t notesz;
3421};
3422
a2547a13 3423struct target_elf_siginfo {
f8fd4fc4
PB		 3424 abi_int si_signo; /* signal number */
3425 abi_int si_code; /* extra code */
3426 abi_int si_errno; /* errno */
edf8e2af
MW		 3427};
3428
a2547a13
LD		 3429struct target_elf_prstatus {
3430 struct target_elf_siginfo pr_info; /* Info associated with signal */
1ddd592f 3431 abi_short pr_cursig; /* Current signal */
ca98ac83
PB		 3432 abi_ulong pr_sigpend; /* XXX */
3433 abi_ulong pr_sighold; /* XXX */
c227f099
AL		 3434 target_pid_t pr_pid;
3435 target_pid_t pr_ppid;
3436 target_pid_t pr_pgrp;
3437 target_pid_t pr_sid;
edf8e2af
MW		 3438 struct target_timeval pr_utime; /* XXX User time */
3439 struct target_timeval pr_stime; /* XXX System time */
3440 struct target_timeval pr_cutime; /* XXX Cumulative user time */
3441 struct target_timeval pr_cstime; /* XXX Cumulative system time */
c227f099 3442 target_elf_gregset_t pr_reg; /* GP registers */
f8fd4fc4 3443 abi_int pr_fpvalid; /* XXX */
edf8e2af
MW		 3444};
3445
3446#define ELF_PRARGSZ (80) /* Number of chars for args */
3447
a2547a13 3448struct target_elf_prpsinfo {
edf8e2af
MW		 3449 char pr_state; /* numeric process state */
3450 char pr_sname; /* char for pr_state */
3451 char pr_zomb; /* zombie */
3452 char pr_nice; /* nice val */
ca98ac83 3453 abi_ulong pr_flag; /* flags */
c227f099
AL		 3454 target_uid_t pr_uid;
3455 target_gid_t pr_gid;
3456 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
edf8e2af 3457 /* Lots missing */
d7eb2b92 3458 char pr_fname[16] QEMU_NONSTRING; /* filename of executable */
edf8e2af
MW		 3459 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
3460};
3461
3462/* Here is the structure in which status of each thread is captured. */
3463struct elf_thread_status {
72cf2d4f 3464 QTAILQ_ENTRY(elf_thread_status) ets_link;
a2547a13 3465 struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
edf8e2af
MW		 3466#if 0
3467 elf_fpregset_t fpu; /* NT_PRFPREG */
3468 struct task_struct *thread;
3469 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
3470#endif
3471 struct memelfnote notes[1];
3472 int num_notes;
3473};
3474
3475struct elf_note_info {
3476 struct memelfnote *notes;
a2547a13
LD		 3477 struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
3478 struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
edf8e2af 3479
b58deb34 3480 QTAILQ_HEAD(, elf_thread_status) thread_list;
edf8e2af
MW		 3481#if 0
3482 /*
3483 * Current version of ELF coredump doesn't support
3484 * dumping fp regs etc.
3485 */
3486 elf_fpregset_t *fpu;
3487 elf_fpxregset_t *xfpu;
3488 int thread_status_size;
3489#endif
3490 int notes_size;
3491 int numnote;
3492};
3493
3494struct vm_area_struct {
1a1c4db9
MI		 3495 target_ulong vma_start; /* start vaddr of memory region */
3496 target_ulong vma_end; /* end vaddr of memory region */
3497 abi_ulong vma_flags; /* protection etc. flags for the region */
72cf2d4f 3498 QTAILQ_ENTRY(vm_area_struct) vma_link;
edf8e2af
MW		 3499};
3500
3501struct mm_struct {
72cf2d4f 3502 QTAILQ_HEAD(, vm_area_struct) mm_mmap;
edf8e2af
MW		 3503 int mm_count; /* number of mappings */
3504};
3505
3506static struct mm_struct *vma_init(void);
3507static void vma_delete(struct mm_struct *);
1a1c4db9
MI		 3508static int vma_add_mapping(struct mm_struct *, target_ulong,
3509 target_ulong, abi_ulong);
edf8e2af
MW		 3510static int vma_get_mapping_count(const struct mm_struct *);
3511static struct vm_area_struct *vma_first(const struct mm_struct *);
3512static struct vm_area_struct *vma_next(struct vm_area_struct *);
3513static abi_ulong vma_dump_size(const struct vm_area_struct *);
1a1c4db9 3514static int vma_walker(void *priv, target_ulong start, target_ulong end,
d97ef72e 3515 unsigned long flags);
edf8e2af
MW		 3516
3517static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
3518static void fill_note(struct memelfnote *, const char *, int,
d97ef72e 3519 unsigned int, void *);
a2547a13
LD		 3520static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
3521static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
edf8e2af
MW		 3522static void fill_auxv_note(struct memelfnote *, const TaskState *);
3523static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
3524static size_t note_size(const struct memelfnote *);
3525static void free_note_info(struct elf_note_info *);
9349b4f9
AF		 3526static int fill_note_info(struct elf_note_info *, long, const CPUArchState *);
3527static void fill_thread_info(struct elf_note_info *, const CPUArchState *);
edf8e2af
MW		 3528
3529static int dump_write(int, const void *, size_t);
3530static int write_note(struct memelfnote *, int);
3531static int write_note_info(struct elf_note_info *, int);
3532
3533#ifdef BSWAP_NEEDED
a2547a13 3534static void bswap_prstatus(struct target_elf_prstatus *prstatus)
edf8e2af 3535{
ca98ac83
PB		 3536 prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo);
3537 prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code);
3538 prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno);
edf8e2af 3539 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
ca98ac83
PB		 3540 prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend);
3541 prstatus->pr_sighold = tswapal(prstatus->pr_sighold);
edf8e2af
MW		 3542 prstatus->pr_pid = tswap32(prstatus->pr_pid);
3543 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
3544 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
3545 prstatus->pr_sid = tswap32(prstatus->pr_sid);
3546 /* cpu times are not filled, so we skip them */
3547 /* regs should be in correct format already */
3548 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
3549}
3550
a2547a13 3551static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
edf8e2af 3552{
ca98ac83 3553 psinfo->pr_flag = tswapal(psinfo->pr_flag);
edf8e2af
MW		 3554 psinfo->pr_uid = tswap16(psinfo->pr_uid);
3555 psinfo->pr_gid = tswap16(psinfo->pr_gid);
3556 psinfo->pr_pid = tswap32(psinfo->pr_pid);
3557 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
3558 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
3559 psinfo->pr_sid = tswap32(psinfo->pr_sid);
3560}
991f8f0c
RH		 3561
3562static void bswap_note(struct elf_note *en)
3563{
3564 bswap32s(&en->n_namesz);
3565 bswap32s(&en->n_descsz);
3566 bswap32s(&en->n_type);
3567}
3568#else
3569static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
3570static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
3571static inline void bswap_note(struct elf_note *en) { }
edf8e2af
MW		 3572#endif /* BSWAP_NEEDED */
3573
3574/*
3575 * Minimal support for linux memory regions. These are needed
3576 * when we are finding out what memory exactly belongs to
3577 * emulated process. No locks needed here, as long as
3578 * thread that received the signal is stopped.
3579 */
3580
3581static struct mm_struct *vma_init(void)
3582{
3583 struct mm_struct *mm;
3584
7267c094 3585 if ((mm = g_malloc(sizeof (*mm))) == NULL)
edf8e2af
MW		 3586 return (NULL);
3587
3588 mm->mm_count = 0;
72cf2d4f 3589 QTAILQ_INIT(&mm->mm_mmap);
edf8e2af
MW		 3590
3591 return (mm);
3592}
3593
3594static void vma_delete(struct mm_struct *mm)
3595{
3596 struct vm_area_struct *vma;
3597
3598 while ((vma = vma_first(mm)) != NULL) {
72cf2d4f 3599 QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
7267c094 3600 g_free(vma);
edf8e2af 3601 }
7267c094 3602 g_free(mm);
edf8e2af
MW		 3603}
3604
1a1c4db9
MI		 3605static int vma_add_mapping(struct mm_struct *mm, target_ulong start,
3606 target_ulong end, abi_ulong flags)
edf8e2af
MW		 3607{
3608 struct vm_area_struct *vma;
3609
7267c094 3610 if ((vma = g_malloc0(sizeof (*vma))) == NULL)
edf8e2af
MW		 3611 return (-1);
3612
3613 vma->vma_start = start;
3614 vma->vma_end = end;
3615 vma->vma_flags = flags;
3616
72cf2d4f 3617 QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
edf8e2af
MW		 3618 mm->mm_count++;
3619
3620 return (0);
3621}
3622
3623static struct vm_area_struct *vma_first(const struct mm_struct *mm)
3624{
72cf2d4f 3625 return (QTAILQ_FIRST(&mm->mm_mmap));
edf8e2af
MW		 3626}
3627
3628static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
3629{
72cf2d4f 3630 return (QTAILQ_NEXT(vma, vma_link));
edf8e2af
MW		 3631}
3632
3633static int vma_get_mapping_count(const struct mm_struct *mm)
3634{
3635 return (mm->mm_count);
3636}
3637
3638/*
3639 * Calculate file (dump) size of given memory region.
3640 */
3641static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
3642{
3643 /* if we cannot even read the first page, skip it */
c7169b02 3644 if (!access_ok_untagged(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
edf8e2af
MW		 3645 return (0);
3646
3647 /*
3648 * Usually we don't dump executable pages as they contain
3649 * non-writable code that debugger can read directly from
3650 * target library etc. However, thread stacks are marked
3651 * also executable so we read in first page of given region
3652 * and check whether it contains elf header. If there is
3653 * no elf header, we dump it.
3654 */
3655 if (vma->vma_flags & PROT_EXEC) {
3656 char page[TARGET_PAGE_SIZE];
3657
022625a8
PM		 3658 if (copy_from_user(page, vma->vma_start, sizeof (page))) {
3659 return 0;
3660 }
edf8e2af
MW		 3661 if ((page[EI_MAG0] == ELFMAG0) &&
3662 (page[EI_MAG1] == ELFMAG1) &&
3663 (page[EI_MAG2] == ELFMAG2) &&
3664 (page[EI_MAG3] == ELFMAG3)) {
3665 /*
3666 * Mappings are possibly from ELF binary. Don't dump
3667 * them.
3668 */
3669 return (0);
3670 }
3671 }
3672
3673 return (vma->vma_end - vma->vma_start);
3674}
3675
1a1c4db9 3676static int vma_walker(void *priv, target_ulong start, target_ulong end,
d97ef72e 3677 unsigned long flags)
edf8e2af
MW		 3678{
3679 struct mm_struct *mm = (struct mm_struct *)priv;
3680
edf8e2af
MW		 3681 vma_add_mapping(mm, start, end, flags);
3682 return (0);
3683}
3684
3685static void fill_note(struct memelfnote *note, const char *name, int type,
d97ef72e 3686 unsigned int sz, void *data)
edf8e2af
MW		 3687{
3688 unsigned int namesz;
3689
3690 namesz = strlen(name) + 1;
3691 note->name = name;
3692 note->namesz = namesz;
3693 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
3694 note->type = type;
80f5ce75
LV		 3695 note->datasz = sz;
3696 note->datasz_rounded = roundup(sz, sizeof (int32_t));
3697
edf8e2af
MW		 3698 note->data = data;
3699
3700 /*
3701 * We calculate rounded up note size here as specified by
3702 * ELF document.
3703 */
3704 note->notesz = sizeof (struct elf_note) +
80f5ce75 3705 note->namesz_rounded + note->datasz_rounded;
edf8e2af
MW		 3706}
3707
3708static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
d97ef72e 3709 uint32_t flags)
edf8e2af
MW		 3710{
3711 (void) memset(elf, 0, sizeof(*elf));
3712
3713 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
3714 elf->e_ident[EI_CLASS] = ELF_CLASS;
3715 elf->e_ident[EI_DATA] = ELF_DATA;
3716 elf->e_ident[EI_VERSION] = EV_CURRENT;
3717 elf->e_ident[EI_OSABI] = ELF_OSABI;
3718
3719 elf->e_type = ET_CORE;
3720 elf->e_machine = machine;
3721 elf->e_version = EV_CURRENT;
3722 elf->e_phoff = sizeof(struct elfhdr);
3723 elf->e_flags = flags;
3724 elf->e_ehsize = sizeof(struct elfhdr);
3725 elf->e_phentsize = sizeof(struct elf_phdr);
3726 elf->e_phnum = segs;
3727
edf8e2af 3728 bswap_ehdr(elf);
edf8e2af
MW		 3729}
3730
3731static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
3732{
3733 phdr->p_type = PT_NOTE;
3734 phdr->p_offset = offset;
3735 phdr->p_vaddr = 0;
3736 phdr->p_paddr = 0;
3737 phdr->p_filesz = sz;
3738 phdr->p_memsz = 0;
3739 phdr->p_flags = 0;
3740 phdr->p_align = 0;
3741
991f8f0c 3742 bswap_phdr(phdr, 1);
edf8e2af
MW		 3743}
3744
3745static size_t note_size(const struct memelfnote *note)
3746{
3747 return (note->notesz);
3748}
3749
a2547a13 3750static void fill_prstatus(struct target_elf_prstatus *prstatus,
d97ef72e 3751 const TaskState *ts, int signr)
edf8e2af
MW		 3752{
3753 (void) memset(prstatus, 0, sizeof (*prstatus));
3754 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
3755 prstatus->pr_pid = ts->ts_tid;
3756 prstatus->pr_ppid = getppid();
3757 prstatus->pr_pgrp = getpgrp();
3758 prstatus->pr_sid = getsid(0);
3759
edf8e2af 3760 bswap_prstatus(prstatus);
edf8e2af
MW		 3761}
3762
a2547a13 3763static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
edf8e2af 3764{
900cfbca 3765 char *base_filename;
edf8e2af
MW		 3766 unsigned int i, len;
3767
3768 (void) memset(psinfo, 0, sizeof (*psinfo));
3769
5f779a3a 3770 len = ts->info->env_strings - ts->info->arg_strings;
edf8e2af
MW		 3771 if (len >= ELF_PRARGSZ)
3772 len = ELF_PRARGSZ - 1;
5f779a3a 3773 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_strings, len)) {
edf8e2af 3774 return -EFAULT;
5f779a3a 3775 }
edf8e2af
MW		 3776 for (i = 0; i < len; i++)
3777 if (psinfo->pr_psargs[i] == 0)
3778 psinfo->pr_psargs[i] = ' ';
3779 psinfo->pr_psargs[len] = 0;
3780
3781 psinfo->pr_pid = getpid();
3782 psinfo->pr_ppid = getppid();
3783 psinfo->pr_pgrp = getpgrp();
3784 psinfo->pr_sid = getsid(0);
3785 psinfo->pr_uid = getuid();
3786 psinfo->pr_gid = getgid();
3787
900cfbca
JM		 3788 base_filename = g_path_get_basename(ts->bprm->filename);
3789 /*
3790 * Using strncpy here is fine: at max-length,
3791 * this field is not NUL-terminated.
3792 */
edf8e2af 3793 (void) strncpy(psinfo->pr_fname, base_filename,
d97ef72e 3794 sizeof(psinfo->pr_fname));
edf8e2af 3795
900cfbca 3796 g_free(base_filename);
edf8e2af 3797 bswap_psinfo(psinfo);
edf8e2af
MW		 3798 return (0);
3799}
3800
3801static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
3802{
3803 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
3804 elf_addr_t orig_auxv = auxv;
edf8e2af 3805 void *ptr;
125b0f55 3806 int len = ts->info->auxv_len;
edf8e2af
MW		 3807
3808 /*
3809 * Auxiliary vector is stored in target process stack. It contains
3810 * {type, value} pairs that we need to dump into note. This is not
3811 * strictly necessary but we do it here for sake of completeness.
3812 */
3813
edf8e2af
MW		 3814 /* read in whole auxv vector and copy it to memelfnote */
3815 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
3816 if (ptr != NULL) {
3817 fill_note(note, "CORE", NT_AUXV, len, ptr);
3818 unlock_user(ptr, auxv, len);
3819 }
3820}
3821
3822/*
3823 * Constructs name of coredump file. We have following convention
3824 * for the name:
3825 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
3826 *
68af19ad 3827 * Returns the filename
edf8e2af 3828 */
68af19ad 3829static char *core_dump_filename(const TaskState *ts)
edf8e2af 3830{
68af19ad
DB		 3831 g_autoptr(GDateTime) now = g_date_time_new_now_local();
3832 g_autofree char *nowstr = g_date_time_format(now, "%Y%m%d-%H%M%S");
3833 g_autofree char *base_filename = g_path_get_basename(ts->bprm->filename);
edf8e2af 3834
68af19ad
DB		 3835 return g_strdup_printf("qemu_%s_%s_%d.core",
3836 base_filename, nowstr, (int)getpid());
edf8e2af
MW		 3837}
3838
3839static int dump_write(int fd, const void *ptr, size_t size)
3840{
3841 const char *bufp = (const char *)ptr;
3842 ssize_t bytes_written, bytes_left;
3843 struct rlimit dumpsize;
3844 off_t pos;
3845
3846 bytes_written = 0;
3847 getrlimit(RLIMIT_CORE, &dumpsize);
3848 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
3849 if (errno == ESPIPE) { /* not a seekable stream */
3850 bytes_left = size;
3851 } else {
3852 return pos;
3853 }
3854 } else {
3855 if (dumpsize.rlim_cur <= pos) {
3856 return -1;
3857 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
3858 bytes_left = size;
3859 } else {
3860 size_t limit_left=dumpsize.rlim_cur - pos;
3861 bytes_left = limit_left >= size ? size : limit_left ;
3862 }
3863 }
3864
3865 /*
3866 * In normal conditions, single write(2) should do but
3867 * in case of socket etc. this mechanism is more portable.
3868 */
3869 do {
3870 bytes_written = write(fd, bufp, bytes_left);
3871 if (bytes_written < 0) {
3872 if (errno == EINTR)
3873 continue;
3874 return (-1);
3875 } else if (bytes_written == 0) { /* eof */
3876 return (-1);
3877 }
3878 bufp += bytes_written;
3879 bytes_left -= bytes_written;
3880 } while (bytes_left > 0);
3881
3882 return (0);
3883}
3884
3885static int write_note(struct memelfnote *men, int fd)
3886{
3887 struct elf_note en;
3888
3889 en.n_namesz = men->namesz;
3890 en.n_type = men->type;
3891 en.n_descsz = men->datasz;
3892
edf8e2af 3893 bswap_note(&en);
edf8e2af
MW		 3894
3895 if (dump_write(fd, &en, sizeof(en)) != 0)
3896 return (-1);
3897 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
3898 return (-1);
80f5ce75 3899 if (dump_write(fd, men->data, men->datasz_rounded) != 0)
edf8e2af
MW		 3900 return (-1);
3901
3902 return (0);
3903}
3904
9349b4f9 3905static void fill_thread_info(struct elf_note_info *info, const CPUArchState *env)
edf8e2af 3906{
29a0af61 3907 CPUState *cpu = env_cpu((CPUArchState *)env);
0429a971 3908 TaskState *ts = (TaskState *)cpu->opaque;
edf8e2af
MW		 3909 struct elf_thread_status *ets;
3910
7267c094 3911 ets = g_malloc0(sizeof (*ets));
edf8e2af
MW		 3912 ets->num_notes = 1; /* only prstatus is dumped */
3913 fill_prstatus(&ets->prstatus, ts, 0);
3914 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
3915 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
d97ef72e 3916 &ets->prstatus);
edf8e2af 3917
72cf2d4f 3918 QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
edf8e2af
MW		 3919
3920 info->notes_size += note_size(&ets->notes[0]);
3921}
3922
6afafa86
PM		 3923static void init_note_info(struct elf_note_info *info)
3924{
3925 /* Initialize the elf_note_info structure so that it is at
3926 * least safe to call free_note_info() on it. Must be
3927 * called before calling fill_note_info().
3928 */
3929 memset(info, 0, sizeof (*info));
3930 QTAILQ_INIT(&info->thread_list);
3931}
3932
edf8e2af 3933static int fill_note_info(struct elf_note_info *info,
9349b4f9 3934 long signr, const CPUArchState *env)
edf8e2af
MW		 3935{
3936#define NUMNOTES 3
29a0af61 3937 CPUState *cpu = env_cpu((CPUArchState *)env);
0429a971 3938 TaskState *ts = (TaskState *)cpu->opaque;
edf8e2af
MW		 3939 int i;
3940
c78d65e8 3941 info->notes = g_new0(struct memelfnote, NUMNOTES);
edf8e2af
MW		 3942 if (info->notes == NULL)
3943 return (-ENOMEM);
7267c094 3944 info->prstatus = g_malloc0(sizeof (*info->prstatus));
edf8e2af
MW		 3945 if (info->prstatus == NULL)
3946 return (-ENOMEM);
7267c094 3947 info->psinfo = g_malloc0(sizeof (*info->psinfo));
edf8e2af
MW		 3948 if (info->prstatus == NULL)
3949 return (-ENOMEM);
3950
3951 /*
3952 * First fill in status (and registers) of current thread
3953 * including process info & aux vector.
3954 */
3955 fill_prstatus(info->prstatus, ts, signr);
3956 elf_core_copy_regs(&info->prstatus->pr_reg, env);
3957 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
d97ef72e 3958 sizeof (*info->prstatus), info->prstatus);
edf8e2af
MW		 3959 fill_psinfo(info->psinfo, ts);
3960 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
d97ef72e 3961 sizeof (*info->psinfo), info->psinfo);
edf8e2af
MW		 3962 fill_auxv_note(&info->notes[2], ts);
3963 info->numnote = 3;
3964
3965 info->notes_size = 0;
3966 for (i = 0; i < info->numnote; i++)
3967 info->notes_size += note_size(&info->notes[i]);
3968
3969 /* read and fill status of all threads */
3970 cpu_list_lock();
bdc44640 3971 CPU_FOREACH(cpu) {
a2247f8e 3972 if (cpu == thread_cpu) {
edf8e2af 3973 continue;
182735ef
AF		 3974 }
3975 fill_thread_info(info, (CPUArchState *)cpu->env_ptr);
edf8e2af
MW		 3976 }
3977 cpu_list_unlock();
3978
3979 return (0);
3980}
3981
3982static void free_note_info(struct elf_note_info *info)
3983{
3984 struct elf_thread_status *ets;
3985
72cf2d4f
BS		 3986 while (!QTAILQ_EMPTY(&info->thread_list)) {
3987 ets = QTAILQ_FIRST(&info->thread_list);
3988 QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
7267c094 3989 g_free(ets);
edf8e2af
MW		 3990 }
3991
7267c094
AL		 3992 g_free(info->prstatus);
3993 g_free(info->psinfo);
3994 g_free(info->notes);
edf8e2af
MW		 3995}
3996
3997static int write_note_info(struct elf_note_info *info, int fd)
3998{
3999 struct elf_thread_status *ets;
4000 int i, error = 0;
4001
4002 /* write prstatus, psinfo and auxv for current thread */
4003 for (i = 0; i < info->numnote; i++)
4004 if ((error = write_note(&info->notes[i], fd)) != 0)
4005 return (error);
4006
4007 /* write prstatus for each thread */
52a53afe 4008 QTAILQ_FOREACH(ets, &info->thread_list, ets_link) {
edf8e2af
MW		 4009 if ((error = write_note(&ets->notes[0], fd)) != 0)
4010 return (error);
4011 }
4012
4013 return (0);
4014}
4015
4016/*
4017 * Write out ELF coredump.
4018 *
4019 * See documentation of ELF object file format in:
4020 * http://www.caldera.com/developers/devspecs/gabi41.pdf
4021 *
4022 * Coredump format in linux is following:
4023 *
4024 * 0 +----------------------+ \
4025 * | ELF header | ET_CORE |
4026 * +----------------------+ |
4027 * | ELF program headers | |--- headers
4028 * | - NOTE section | |
4029 * | - PT_LOAD sections | |
4030 * +----------------------+ /
4031 * | NOTEs: |
4032 * | - NT_PRSTATUS |
4033 * | - NT_PRSINFO |
4034 * | - NT_AUXV |
4035 * +----------------------+ <-- aligned to target page
4036 * | Process memory dump |
4037 * : :
4038 * . .
4039 * : :
4040 * | |
4041 * +----------------------+
4042 *
4043 * NT_PRSTATUS -> struct elf_prstatus (per thread)
4044 * NT_PRSINFO -> struct elf_prpsinfo
4045 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
4046 *
4047 * Format follows System V format as close as possible. Current
4048 * version limitations are as follows:
4049 * - no floating point registers are dumped
4050 *
4051 * Function returns 0 in case of success, negative errno otherwise.
4052 *
4053 * TODO: make this work also during runtime: it should be
4054 * possible to force coredump from running process and then
4055 * continue processing. For example qemu could set up SIGUSR2
4056 * handler (provided that target process haven't registered
4057 * handler for that) that does the dump when signal is received.
4058 */
9349b4f9 4059static int elf_core_dump(int signr, const CPUArchState *env)
edf8e2af 4060{
29a0af61 4061 const CPUState *cpu = env_cpu((CPUArchState *)env);
0429a971 4062 const TaskState *ts = (const TaskState *)cpu->opaque;
edf8e2af 4063 struct vm_area_struct *vma = NULL;
68af19ad 4064 g_autofree char *corefile = NULL;
edf8e2af
MW		 4065 struct elf_note_info info;
4066 struct elfhdr elf;
4067 struct elf_phdr phdr;
4068 struct rlimit dumpsize;
4069 struct mm_struct *mm = NULL;
4070 off_t offset = 0, data_offset = 0;
4071 int segs = 0;
4072 int fd = -1;
4073
6afafa86
PM		 4074 init_note_info(&info);
4075
edf8e2af
MW		 4076 errno = 0;
4077 getrlimit(RLIMIT_CORE, &dumpsize);
4078 if (dumpsize.rlim_cur == 0)
d97ef72e 4079 return 0;
edf8e2af 4080
68af19ad 4081 corefile = core_dump_filename(ts);
edf8e2af
MW		 4082
4083 if ((fd = open(corefile, O_WRONLY | O_CREAT,
d97ef72e 4084 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
edf8e2af
MW		 4085 return (-errno);
4086
4087 /*
4088 * Walk through target process memory mappings and
4089 * set up structure containing this information. After
4090 * this point vma_xxx functions can be used.
4091 */
4092 if ((mm = vma_init()) == NULL)
4093 goto out;
4094
4095 walk_memory_regions(mm, vma_walker);
4096 segs = vma_get_mapping_count(mm);
4097
4098 /*
4099 * Construct valid coredump ELF header. We also
4100 * add one more segment for notes.
4101 */
4102 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
4103 if (dump_write(fd, &elf, sizeof (elf)) != 0)
4104 goto out;
4105
b6af0975 4106 /* fill in the in-memory version of notes */
edf8e2af
MW		 4107 if (fill_note_info(&info, signr, env) < 0)
4108 goto out;
4109
4110 offset += sizeof (elf); /* elf header */
4111 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
4112
4113 /* write out notes program header */
4114 fill_elf_note_phdr(&phdr, info.notes_size, offset);
4115
4116 offset += info.notes_size;
4117 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
4118 goto out;
4119
4120 /*
4121 * ELF specification wants data to start at page boundary so
4122 * we align it here.
4123 */
80f5ce75 4124 data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE);
edf8e2af
MW		 4125
4126 /*
4127 * Write program headers for memory regions mapped in
4128 * the target process.
4129 */
4130 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
4131 (void) memset(&phdr, 0, sizeof (phdr));
4132
4133 phdr.p_type = PT_LOAD;
4134 phdr.p_offset = offset;
4135 phdr.p_vaddr = vma->vma_start;
4136 phdr.p_paddr = 0;
4137 phdr.p_filesz = vma_dump_size(vma);
4138 offset += phdr.p_filesz;
4139 phdr.p_memsz = vma->vma_end - vma->vma_start;
4140 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
4141 if (vma->vma_flags & PROT_WRITE)
4142 phdr.p_flags |= PF_W;
4143 if (vma->vma_flags & PROT_EXEC)
4144 phdr.p_flags |= PF_X;
4145 phdr.p_align = ELF_EXEC_PAGESIZE;
4146
80f5ce75 4147 bswap_phdr(&phdr, 1);
772034b6
PM		 4148 if (dump_write(fd, &phdr, sizeof(phdr)) != 0) {
4149 goto out;
4150 }
edf8e2af
MW		 4151 }
4152
4153 /*
4154 * Next we write notes just after program headers. No
4155 * alignment needed here.
4156 */
4157 if (write_note_info(&info, fd) < 0)
4158 goto out;
4159
4160 /* align data to page boundary */
edf8e2af
MW		 4161 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
4162 goto out;
4163
4164 /*
4165 * Finally we can dump process memory into corefile as well.
4166 */
4167 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
4168 abi_ulong addr;
4169 abi_ulong end;
4170
4171 end = vma->vma_start + vma_dump_size(vma);
4172
4173 for (addr = vma->vma_start; addr < end;
d97ef72e 4174 addr += TARGET_PAGE_SIZE) {
edf8e2af
MW		 4175 char page[TARGET_PAGE_SIZE];
4176 int error;
4177
4178 /*
4179 * Read in page from target process memory and
4180 * write it to coredump file.
4181 */
4182 error = copy_from_user(page, addr, sizeof (page));
4183 if (error != 0) {
49995e17 4184 (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
d97ef72e 4185 addr);
edf8e2af
MW		 4186 errno = -error;
4187 goto out;
4188 }
4189 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
4190 goto out;
4191 }
4192 }
4193
d97ef72e 4194 out:
edf8e2af
MW		 4195 free_note_info(&info);
4196 if (mm != NULL)
4197 vma_delete(mm);
4198 (void) close(fd);
4199
4200 if (errno != 0)
4201 return (-errno);
4202 return (0);
4203}
edf8e2af
MW		 4204#endif /* USE_ELF_CORE_DUMP */
4205
e5fe0c52
PB		 4206void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
4207{
4208 init_thread(regs, infop);
4209}
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