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linux-user: Fix possible realloc memory leak
[qemu.git] / linux-user / elfload.c
CommitLineData
31e31b8a 1/* This is the Linux kernel elf-loading code, ported into user space */
edf8e2af
MW		 2#include <sys/time.h>
3#include <sys/param.h>
31e31b8a
FB		 4
5#include <stdio.h>
6#include <sys/types.h>
7#include <fcntl.h>
31e31b8a
FB		 8#include <errno.h>
9#include <unistd.h>
10#include <sys/mman.h>
edf8e2af 11#include <sys/resource.h>
31e31b8a
FB		 12#include <stdlib.h>
13#include <string.h>
edf8e2af 14#include <time.h>
31e31b8a 15
3ef693a0 16#include "qemu.h"
689f936f 17#include "disas.h"
31e31b8a 18
e58ffeb3 19#ifdef _ARCH_PPC64
a6cc84f4 20#undef ARCH_DLINFO
21#undef ELF_PLATFORM
22#undef ELF_HWCAP
23#undef ELF_CLASS
24#undef ELF_DATA
25#undef ELF_ARCH
26#endif
27
edf8e2af
MW		 28#define ELF_OSABI ELFOSABI_SYSV
29
cb33da57
BS		 30/* from personality.h */
31
32/*
33 * Flags for bug emulation.
34 *
35 * These occupy the top three bytes.
36 */
37enum {
d97ef72e
RH		 38 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
39 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to
40 descriptors (signal handling) */
41 MMAP_PAGE_ZERO = 0x0100000,
42 ADDR_COMPAT_LAYOUT = 0x0200000,
43 READ_IMPLIES_EXEC = 0x0400000,
44 ADDR_LIMIT_32BIT = 0x0800000,
45 SHORT_INODE = 0x1000000,
46 WHOLE_SECONDS = 0x2000000,
47 STICKY_TIMEOUTS = 0x4000000,
48 ADDR_LIMIT_3GB = 0x8000000,
cb33da57
BS		 49};
50
51/*
52 * Personality types.
53 *
54 * These go in the low byte. Avoid using the top bit, it will
55 * conflict with error returns.
56 */
57enum {
d97ef72e
RH		 58 PER_LINUX = 0x0000,
59 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
60 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
61 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
62 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
63 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,
64 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
65 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
66 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
67 PER_BSD = 0x0006,
68 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
69 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
70 PER_LINUX32 = 0x0008,
71 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
72 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
73 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
74 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
75 PER_RISCOS = 0x000c,
76 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
77 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
78 PER_OSF4 = 0x000f, /* OSF/1 v4 */
79 PER_HPUX = 0x0010,
80 PER_MASK = 0x00ff,
cb33da57
BS		 81};
82
83/*
84 * Return the base personality without flags.
85 */
d97ef72e 86#define personality(pers) (pers & PER_MASK)
cb33da57 87
83fb7adf
FB		 88/* this flag is uneffective under linux too, should be deleted */
89#ifndef MAP_DENYWRITE
90#define MAP_DENYWRITE 0
91#endif
92
93/* should probably go in elf.h */
94#ifndef ELIBBAD
95#define ELIBBAD 80
96#endif
97
28490231
RH		 98#ifdef TARGET_WORDS_BIGENDIAN
99#define ELF_DATA ELFDATA2MSB
100#else
101#define ELF_DATA ELFDATA2LSB
102#endif
103
d97ef72e 104typedef target_ulong target_elf_greg_t;
21e807fa 105#ifdef USE_UID16
d97ef72e
RH		 106typedef uint16_t target_uid_t;
107typedef uint16_t target_gid_t;
21e807fa 108#else
d97ef72e
RH		 109typedef uint32_t target_uid_t;
110typedef uint32_t target_gid_t;
21e807fa 111#endif
d97ef72e 112typedef int32_t target_pid_t;
21e807fa 113
30ac07d4
FB		 114#ifdef TARGET_I386
115
15338fd7
FB		 116#define ELF_PLATFORM get_elf_platform()
117
118static const char *get_elf_platform(void)
119{
120 static char elf_platform[] = "i386";
d5975363 121 int family = (thread_env->cpuid_version >> 8) & 0xff;
15338fd7
FB		 122 if (family > 6)
123 family = 6;
124 if (family >= 3)
125 elf_platform[1] = '0' + family;
126 return elf_platform;
127}
128
129#define ELF_HWCAP get_elf_hwcap()
130
131static uint32_t get_elf_hwcap(void)
132{
d97ef72e 133 return thread_env->cpuid_features;
15338fd7
FB		 134}
135
84409ddb
JM		 136#ifdef TARGET_X86_64
137#define ELF_START_MMAP 0x2aaaaab000ULL
138#define elf_check_arch(x) ( ((x) == ELF_ARCH) )
139
140#define ELF_CLASS ELFCLASS64
84409ddb
JM		 141#define ELF_ARCH EM_X86_64
142
143static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
144{
145 regs->rax = 0;
146 regs->rsp = infop->start_stack;
147 regs->rip = infop->entry;
148}
149
9edc5d79 150#define ELF_NREG 27
c227f099 151typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 152
153/*
154 * Note that ELF_NREG should be 29 as there should be place for
155 * TRAPNO and ERR "registers" as well but linux doesn't dump
156 * those.
157 *
158 * See linux kernel: arch/x86/include/asm/elf.h
159 */
c227f099 160static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
9edc5d79
MW		 161{
162 (*regs)[0] = env->regs[15];
163 (*regs)[1] = env->regs[14];
164 (*regs)[2] = env->regs[13];
165 (*regs)[3] = env->regs[12];
166 (*regs)[4] = env->regs[R_EBP];
167 (*regs)[5] = env->regs[R_EBX];
168 (*regs)[6] = env->regs[11];
169 (*regs)[7] = env->regs[10];
170 (*regs)[8] = env->regs[9];
171 (*regs)[9] = env->regs[8];
172 (*regs)[10] = env->regs[R_EAX];
173 (*regs)[11] = env->regs[R_ECX];
174 (*regs)[12] = env->regs[R_EDX];
175 (*regs)[13] = env->regs[R_ESI];
176 (*regs)[14] = env->regs[R_EDI];
177 (*regs)[15] = env->regs[R_EAX]; /* XXX */
178 (*regs)[16] = env->eip;
179 (*regs)[17] = env->segs[R_CS].selector & 0xffff;
180 (*regs)[18] = env->eflags;
181 (*regs)[19] = env->regs[R_ESP];
182 (*regs)[20] = env->segs[R_SS].selector & 0xffff;
183 (*regs)[21] = env->segs[R_FS].selector & 0xffff;
184 (*regs)[22] = env->segs[R_GS].selector & 0xffff;
185 (*regs)[23] = env->segs[R_DS].selector & 0xffff;
186 (*regs)[24] = env->segs[R_ES].selector & 0xffff;
187 (*regs)[25] = env->segs[R_FS].selector & 0xffff;
188 (*regs)[26] = env->segs[R_GS].selector & 0xffff;
189}
190
84409ddb
JM		 191#else
192
30ac07d4
FB		 193#define ELF_START_MMAP 0x80000000
194
30ac07d4
FB		 195/*
196 * This is used to ensure we don't load something for the wrong architecture.
197 */
198#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
199
200/*
201 * These are used to set parameters in the core dumps.
202 */
d97ef72e 203#define ELF_CLASS ELFCLASS32
d97ef72e 204#define ELF_ARCH EM_386
30ac07d4 205
d97ef72e
RH		 206static inline void init_thread(struct target_pt_regs *regs,
207 struct image_info *infop)
b346ff46
FB		 208{
209 regs->esp = infop->start_stack;
210 regs->eip = infop->entry;
e5fe0c52
PB		 211
212 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
213 starts %edx contains a pointer to a function which might be
214 registered using `atexit'. This provides a mean for the
215 dynamic linker to call DT_FINI functions for shared libraries
216 that have been loaded before the code runs.
217
218 A value of 0 tells we have no such handler. */
219 regs->edx = 0;
b346ff46 220}
9edc5d79 221
9edc5d79 222#define ELF_NREG 17
c227f099 223typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 224
225/*
226 * Note that ELF_NREG should be 19 as there should be place for
227 * TRAPNO and ERR "registers" as well but linux doesn't dump
228 * those.
229 *
230 * See linux kernel: arch/x86/include/asm/elf.h
231 */
c227f099 232static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
9edc5d79
MW		 233{
234 (*regs)[0] = env->regs[R_EBX];
235 (*regs)[1] = env->regs[R_ECX];
236 (*regs)[2] = env->regs[R_EDX];
237 (*regs)[3] = env->regs[R_ESI];
238 (*regs)[4] = env->regs[R_EDI];
239 (*regs)[5] = env->regs[R_EBP];
240 (*regs)[6] = env->regs[R_EAX];
241 (*regs)[7] = env->segs[R_DS].selector & 0xffff;
242 (*regs)[8] = env->segs[R_ES].selector & 0xffff;
243 (*regs)[9] = env->segs[R_FS].selector & 0xffff;
244 (*regs)[10] = env->segs[R_GS].selector & 0xffff;
245 (*regs)[11] = env->regs[R_EAX]; /* XXX */
246 (*regs)[12] = env->eip;
247 (*regs)[13] = env->segs[R_CS].selector & 0xffff;
248 (*regs)[14] = env->eflags;
249 (*regs)[15] = env->regs[R_ESP];
250 (*regs)[16] = env->segs[R_SS].selector & 0xffff;
251}
84409ddb 252#endif
b346ff46 253
9edc5d79 254#define USE_ELF_CORE_DUMP
d97ef72e 255#define ELF_EXEC_PAGESIZE 4096
b346ff46
FB		 256
257#endif
258
259#ifdef TARGET_ARM
260
261#define ELF_START_MMAP 0x80000000
262
263#define elf_check_arch(x) ( (x) == EM_ARM )
264
d97ef72e 265#define ELF_CLASS ELFCLASS32
d97ef72e 266#define ELF_ARCH EM_ARM
b346ff46 267
d97ef72e
RH		 268static inline void init_thread(struct target_pt_regs *regs,
269 struct image_info *infop)
b346ff46 270{
992f48a0 271 abi_long stack = infop->start_stack;
b346ff46
FB		 272 memset(regs, 0, sizeof(*regs));
273 regs->ARM_cpsr = 0x10;
0240ded8 274 if (infop->entry & 1)
d97ef72e 275 regs->ARM_cpsr |= CPSR_T;
0240ded8 276 regs->ARM_pc = infop->entry & 0xfffffffe;
b346ff46 277 regs->ARM_sp = infop->start_stack;
2f619698
FB		 278 /* FIXME - what to for failure of get_user()? */
279 get_user_ual(regs->ARM_r2, stack + 8); /* envp */
280 get_user_ual(regs->ARM_r1, stack + 4); /* envp */
a1516e92 281 /* XXX: it seems that r0 is zeroed after ! */
e5fe0c52
PB		 282 regs->ARM_r0 = 0;
283 /* For uClinux PIC binaries. */
863cf0b7 284 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
e5fe0c52 285 regs->ARM_r10 = infop->start_data;
b346ff46
FB		 286}
287
edf8e2af 288#define ELF_NREG 18
c227f099 289typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 290
c227f099 291static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
edf8e2af 292{
d049e626
NF		 293 (*regs)[0] = tswapl(env->regs[0]);
294 (*regs)[1] = tswapl(env->regs[1]);
295 (*regs)[2] = tswapl(env->regs[2]);
296 (*regs)[3] = tswapl(env->regs[3]);
297 (*regs)[4] = tswapl(env->regs[4]);
298 (*regs)[5] = tswapl(env->regs[5]);
299 (*regs)[6] = tswapl(env->regs[6]);
300 (*regs)[7] = tswapl(env->regs[7]);
301 (*regs)[8] = tswapl(env->regs[8]);
302 (*regs)[9] = tswapl(env->regs[9]);
303 (*regs)[10] = tswapl(env->regs[10]);
304 (*regs)[11] = tswapl(env->regs[11]);
305 (*regs)[12] = tswapl(env->regs[12]);
306 (*regs)[13] = tswapl(env->regs[13]);
307 (*regs)[14] = tswapl(env->regs[14]);
308 (*regs)[15] = tswapl(env->regs[15]);
309
310 (*regs)[16] = tswapl(cpsr_read((CPUState *)env));
311 (*regs)[17] = tswapl(env->regs[0]); /* XXX */
edf8e2af
MW		 312}
313
30ac07d4 314#define USE_ELF_CORE_DUMP
d97ef72e 315#define ELF_EXEC_PAGESIZE 4096
30ac07d4 316
afce2927
FB		 317enum
318{
d97ef72e
RH		 319 ARM_HWCAP_ARM_SWP = 1 << 0,
320 ARM_HWCAP_ARM_HALF = 1 << 1,
321 ARM_HWCAP_ARM_THUMB = 1 << 2,
322 ARM_HWCAP_ARM_26BIT = 1 << 3,
323 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
324 ARM_HWCAP_ARM_FPA = 1 << 5,
325 ARM_HWCAP_ARM_VFP = 1 << 6,
326 ARM_HWCAP_ARM_EDSP = 1 << 7,
327 ARM_HWCAP_ARM_JAVA = 1 << 8,
328 ARM_HWCAP_ARM_IWMMXT = 1 << 9,
329 ARM_HWCAP_ARM_THUMBEE = 1 << 10,
330 ARM_HWCAP_ARM_NEON = 1 << 11,
331 ARM_HWCAP_ARM_VFPv3 = 1 << 12,
332 ARM_HWCAP_ARM_VFPv3D16 = 1 << 13,
afce2927
FB		 333};
334
d97ef72e
RH		 335#define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
336 | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \
337 | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP \
338 | ARM_HWCAP_ARM_NEON | ARM_HWCAP_ARM_VFPv3 )
afce2927 339
30ac07d4
FB		 340#endif
341
853d6f7a 342#ifdef TARGET_SPARC
a315a145 343#ifdef TARGET_SPARC64
853d6f7a
FB		 344
345#define ELF_START_MMAP 0x80000000
346
992f48a0 347#ifndef TARGET_ABI32
cb33da57 348#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
992f48a0
BS		 349#else
350#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
351#endif
853d6f7a 352
a315a145 353#define ELF_CLASS ELFCLASS64
5ef54116
FB		 354#define ELF_ARCH EM_SPARCV9
355
d97ef72e 356#define STACK_BIAS 2047
a315a145 357
d97ef72e
RH		 358static inline void init_thread(struct target_pt_regs *regs,
359 struct image_info *infop)
a315a145 360{
992f48a0 361#ifndef TARGET_ABI32
a315a145 362 regs->tstate = 0;
992f48a0 363#endif
a315a145
FB		 364 regs->pc = infop->entry;
365 regs->npc = regs->pc + 4;
366 regs->y = 0;
992f48a0
BS		 367#ifdef TARGET_ABI32
368 regs->u_regs[14] = infop->start_stack - 16 * 4;
369#else
cb33da57
BS		 370 if (personality(infop->personality) == PER_LINUX32)
371 regs->u_regs[14] = infop->start_stack - 16 * 4;
372 else
373 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
992f48a0 374#endif
a315a145
FB		 375}
376
377#else
378#define ELF_START_MMAP 0x80000000
379
380#define elf_check_arch(x) ( (x) == EM_SPARC )
381
853d6f7a 382#define ELF_CLASS ELFCLASS32
853d6f7a
FB		 383#define ELF_ARCH EM_SPARC
384
d97ef72e
RH		 385static inline void init_thread(struct target_pt_regs *regs,
386 struct image_info *infop)
853d6f7a 387{
f5155289
FB		 388 regs->psr = 0;
389 regs->pc = infop->entry;
390 regs->npc = regs->pc + 4;
391 regs->y = 0;
392 regs->u_regs[14] = infop->start_stack - 16 * 4;
853d6f7a
FB		 393}
394
a315a145 395#endif
853d6f7a
FB		 396#endif
397
67867308
FB		 398#ifdef TARGET_PPC
399
400#define ELF_START_MMAP 0x80000000
401
e85e7c6e 402#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
84409ddb
JM		 403
404#define elf_check_arch(x) ( (x) == EM_PPC64 )
405
d97ef72e 406#define ELF_CLASS ELFCLASS64
84409ddb
JM		 407
408#else
409
67867308
FB		 410#define elf_check_arch(x) ( (x) == EM_PPC )
411
d97ef72e 412#define ELF_CLASS ELFCLASS32
84409ddb
JM		 413
414#endif
415
d97ef72e 416#define ELF_ARCH EM_PPC
67867308 417
df84e4f3
NF		 418/* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
419 See arch/powerpc/include/asm/cputable.h. */
420enum {
3efa9a67 421 QEMU_PPC_FEATURE_32 = 0x80000000,
422 QEMU_PPC_FEATURE_64 = 0x40000000,
423 QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
424 QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
425 QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
426 QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
427 QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
428 QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
429 QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
430 QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
431 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
432 QEMU_PPC_FEATURE_NO_TB = 0x00100000,
433 QEMU_PPC_FEATURE_POWER4 = 0x00080000,
434 QEMU_PPC_FEATURE_POWER5 = 0x00040000,
435 QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
436 QEMU_PPC_FEATURE_CELL = 0x00010000,
437 QEMU_PPC_FEATURE_BOOKE = 0x00008000,
438 QEMU_PPC_FEATURE_SMT = 0x00004000,
439 QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
440 QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
441 QEMU_PPC_FEATURE_PA6T = 0x00000800,
442 QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
443 QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
444 QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
445 QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
446 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
447
448 QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
449 QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
df84e4f3
NF		 450};
451
452#define ELF_HWCAP get_elf_hwcap()
453
454static uint32_t get_elf_hwcap(void)
455{
456 CPUState *e = thread_env;
457 uint32_t features = 0;
458
459 /* We don't have to be terribly complete here; the high points are
460 Altivec/FP/SPE support. Anything else is just a bonus. */
d97ef72e 461#define GET_FEATURE(flag, feature) \
df84e4f3 462 do {if (e->insns_flags & flag) features |= feature; } while(0)
3efa9a67 463 GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
464 GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
465 GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
466 GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
467 GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
468 GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
469 GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
470 GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
df84e4f3
NF		 471#undef GET_FEATURE
472
473 return features;
474}
475
f5155289
FB		 476/*
477 * The requirements here are:
478 * - keep the final alignment of sp (sp & 0xf)
479 * - make sure the 32-bit value at the first 16 byte aligned position of
480 * AUXV is greater than 16 for glibc compatibility.
481 * AT_IGNOREPPC is used for that.
482 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
483 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
484 */
0bccf03d 485#define DLINFO_ARCH_ITEMS 5
d97ef72e
RH		 486#define ARCH_DLINFO \
487 do { \
488 NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
489 NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
490 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
491 /* \
492 * Now handle glibc compatibility. \
493 */ \
494 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
495 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
496 } while (0)
f5155289 497
67867308
FB		 498static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
499{
67867308 500 _regs->gpr[1] = infop->start_stack;
e85e7c6e 501#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
7983f435
RL		 502 _regs->gpr[2] = ldq_raw(infop->entry + 8) + infop->load_addr;
503 infop->entry = ldq_raw(infop->entry) + infop->load_addr;
84409ddb 504#endif
67867308
FB		 505 _regs->nip = infop->entry;
506}
507
e2f3e741
NF		 508/* See linux kernel: arch/powerpc/include/asm/elf.h. */
509#define ELF_NREG 48
510typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
511
512static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
513{
514 int i;
515 target_ulong ccr = 0;
516
517 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
518 (*regs)[i] = tswapl(env->gpr[i]);
519 }
520
521 (*regs)[32] = tswapl(env->nip);
522 (*regs)[33] = tswapl(env->msr);
523 (*regs)[35] = tswapl(env->ctr);
524 (*regs)[36] = tswapl(env->lr);
525 (*regs)[37] = tswapl(env->xer);
526
527 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
528 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
529 }
530 (*regs)[38] = tswapl(ccr);
531}
532
533#define USE_ELF_CORE_DUMP
d97ef72e 534#define ELF_EXEC_PAGESIZE 4096
67867308
FB		 535
536#endif
537
048f6b4d
FB		 538#ifdef TARGET_MIPS
539
540#define ELF_START_MMAP 0x80000000
541
542#define elf_check_arch(x) ( (x) == EM_MIPS )
543
388bb21a
TS		 544#ifdef TARGET_MIPS64
545#define ELF_CLASS ELFCLASS64
546#else
048f6b4d 547#define ELF_CLASS ELFCLASS32
388bb21a 548#endif
048f6b4d
FB		 549#define ELF_ARCH EM_MIPS
550
d97ef72e
RH		 551static inline void init_thread(struct target_pt_regs *regs,
552 struct image_info *infop)
048f6b4d 553{
623a930e 554 regs->cp0_status = 2 << CP0St_KSU;
048f6b4d
FB		 555 regs->cp0_epc = infop->entry;
556 regs->regs[29] = infop->start_stack;
557}
558
51e52606
NF		 559/* See linux kernel: arch/mips/include/asm/elf.h. */
560#define ELF_NREG 45
561typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
562
563/* See linux kernel: arch/mips/include/asm/reg.h. */
564enum {
565#ifdef TARGET_MIPS64
566 TARGET_EF_R0 = 0,
567#else
568 TARGET_EF_R0 = 6,
569#endif
570 TARGET_EF_R26 = TARGET_EF_R0 + 26,
571 TARGET_EF_R27 = TARGET_EF_R0 + 27,
572 TARGET_EF_LO = TARGET_EF_R0 + 32,
573 TARGET_EF_HI = TARGET_EF_R0 + 33,
574 TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
575 TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
576 TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
577 TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
578};
579
580/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
581static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
582{
583 int i;
584
585 for (i = 0; i < TARGET_EF_R0; i++) {
586 (*regs)[i] = 0;
587 }
588 (*regs)[TARGET_EF_R0] = 0;
589
590 for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
591 (*regs)[TARGET_EF_R0 + i] = tswapl(env->active_tc.gpr[i]);
592 }
593
594 (*regs)[TARGET_EF_R26] = 0;
595 (*regs)[TARGET_EF_R27] = 0;
596 (*regs)[TARGET_EF_LO] = tswapl(env->active_tc.LO[0]);
597 (*regs)[TARGET_EF_HI] = tswapl(env->active_tc.HI[0]);
598 (*regs)[TARGET_EF_CP0_EPC] = tswapl(env->active_tc.PC);
599 (*regs)[TARGET_EF_CP0_BADVADDR] = tswapl(env->CP0_BadVAddr);
600 (*regs)[TARGET_EF_CP0_STATUS] = tswapl(env->CP0_Status);
601 (*regs)[TARGET_EF_CP0_CAUSE] = tswapl(env->CP0_Cause);
602}
603
604#define USE_ELF_CORE_DUMP
388bb21a
TS		 605#define ELF_EXEC_PAGESIZE 4096
606
048f6b4d
FB		 607#endif /* TARGET_MIPS */
608
b779e29e
EI		 609#ifdef TARGET_MICROBLAZE
610
611#define ELF_START_MMAP 0x80000000
612
0d5d4699 613#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
b779e29e
EI		 614
615#define ELF_CLASS ELFCLASS32
0d5d4699 616#define ELF_ARCH EM_MICROBLAZE
b779e29e 617
d97ef72e
RH		 618static inline void init_thread(struct target_pt_regs *regs,
619 struct image_info *infop)
b779e29e
EI		 620{
621 regs->pc = infop->entry;
622 regs->r1 = infop->start_stack;
623
624}
625
b779e29e
EI		 626#define ELF_EXEC_PAGESIZE 4096
627
e4cbd44d
EI		 628#define USE_ELF_CORE_DUMP
629#define ELF_NREG 38
630typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
631
632/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
633static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
634{
635 int i, pos = 0;
636
637 for (i = 0; i < 32; i++) {
638 (*regs)[pos++] = tswapl(env->regs[i]);
639 }
640
641 for (i = 0; i < 6; i++) {
642 (*regs)[pos++] = tswapl(env->sregs[i]);
643 }
644}
645
b779e29e
EI		 646#endif /* TARGET_MICROBLAZE */
647
fdf9b3e8
FB		 648#ifdef TARGET_SH4
649
650#define ELF_START_MMAP 0x80000000
651
652#define elf_check_arch(x) ( (x) == EM_SH )
653
654#define ELF_CLASS ELFCLASS32
fdf9b3e8
FB		 655#define ELF_ARCH EM_SH
656
d97ef72e
RH		 657static inline void init_thread(struct target_pt_regs *regs,
658 struct image_info *infop)
fdf9b3e8 659{
d97ef72e
RH		 660 /* Check other registers XXXXX */
661 regs->pc = infop->entry;
662 regs->regs[15] = infop->start_stack;
fdf9b3e8
FB		 663}
664
7631c97e
NF		 665/* See linux kernel: arch/sh/include/asm/elf.h. */
666#define ELF_NREG 23
667typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
668
669/* See linux kernel: arch/sh/include/asm/ptrace.h. */
670enum {
671 TARGET_REG_PC = 16,
672 TARGET_REG_PR = 17,
673 TARGET_REG_SR = 18,
674 TARGET_REG_GBR = 19,
675 TARGET_REG_MACH = 20,
676 TARGET_REG_MACL = 21,
677 TARGET_REG_SYSCALL = 22
678};
679
d97ef72e
RH		 680static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
681 const CPUState *env)
7631c97e
NF		 682{
683 int i;
684
685 for (i = 0; i < 16; i++) {
686 (*regs[i]) = tswapl(env->gregs[i]);
687 }
688
689 (*regs)[TARGET_REG_PC] = tswapl(env->pc);
690 (*regs)[TARGET_REG_PR] = tswapl(env->pr);
691 (*regs)[TARGET_REG_SR] = tswapl(env->sr);
692 (*regs)[TARGET_REG_GBR] = tswapl(env->gbr);
693 (*regs)[TARGET_REG_MACH] = tswapl(env->mach);
694 (*regs)[TARGET_REG_MACL] = tswapl(env->macl);
695 (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
696}
697
698#define USE_ELF_CORE_DUMP
fdf9b3e8
FB		 699#define ELF_EXEC_PAGESIZE 4096
700
701#endif
702
48733d19
TS		 703#ifdef TARGET_CRIS
704
705#define ELF_START_MMAP 0x80000000
706
707#define elf_check_arch(x) ( (x) == EM_CRIS )
708
709#define ELF_CLASS ELFCLASS32
48733d19
TS		 710#define ELF_ARCH EM_CRIS
711
d97ef72e
RH		 712static inline void init_thread(struct target_pt_regs *regs,
713 struct image_info *infop)
48733d19 714{
d97ef72e 715 regs->erp = infop->entry;
48733d19
TS		 716}
717
48733d19
TS		 718#define ELF_EXEC_PAGESIZE 8192
719
720#endif
721
e6e5906b
PB		 722#ifdef TARGET_M68K
723
724#define ELF_START_MMAP 0x80000000
725
726#define elf_check_arch(x) ( (x) == EM_68K )
727
d97ef72e 728#define ELF_CLASS ELFCLASS32
d97ef72e 729#define ELF_ARCH EM_68K
e6e5906b
PB		 730
731/* ??? Does this need to do anything?
d97ef72e 732 #define ELF_PLAT_INIT(_r) */
e6e5906b 733
d97ef72e
RH		 734static inline void init_thread(struct target_pt_regs *regs,
735 struct image_info *infop)
e6e5906b
PB		 736{
737 regs->usp = infop->start_stack;
738 regs->sr = 0;
739 regs->pc = infop->entry;
740}
741
7a93cc55
NF		 742/* See linux kernel: arch/m68k/include/asm/elf.h. */
743#define ELF_NREG 20
744typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
745
746static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
747{
748 (*regs)[0] = tswapl(env->dregs[1]);
749 (*regs)[1] = tswapl(env->dregs[2]);
750 (*regs)[2] = tswapl(env->dregs[3]);
751 (*regs)[3] = tswapl(env->dregs[4]);
752 (*regs)[4] = tswapl(env->dregs[5]);
753 (*regs)[5] = tswapl(env->dregs[6]);
754 (*regs)[6] = tswapl(env->dregs[7]);
755 (*regs)[7] = tswapl(env->aregs[0]);
756 (*regs)[8] = tswapl(env->aregs[1]);
757 (*regs)[9] = tswapl(env->aregs[2]);
758 (*regs)[10] = tswapl(env->aregs[3]);
759 (*regs)[11] = tswapl(env->aregs[4]);
760 (*regs)[12] = tswapl(env->aregs[5]);
761 (*regs)[13] = tswapl(env->aregs[6]);
762 (*regs)[14] = tswapl(env->dregs[0]);
763 (*regs)[15] = tswapl(env->aregs[7]);
764 (*regs)[16] = tswapl(env->dregs[0]); /* FIXME: orig_d0 */
765 (*regs)[17] = tswapl(env->sr);
766 (*regs)[18] = tswapl(env->pc);
767 (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
768}
769
770#define USE_ELF_CORE_DUMP
d97ef72e 771#define ELF_EXEC_PAGESIZE 8192
e6e5906b
PB		 772
773#endif
774
7a3148a9
JM		 775#ifdef TARGET_ALPHA
776
777#define ELF_START_MMAP (0x30000000000ULL)
778
779#define elf_check_arch(x) ( (x) == ELF_ARCH )
780
781#define ELF_CLASS ELFCLASS64
7a3148a9
JM		 782#define ELF_ARCH EM_ALPHA
783
d97ef72e
RH		 784static inline void init_thread(struct target_pt_regs *regs,
785 struct image_info *infop)
7a3148a9
JM		 786{
787 regs->pc = infop->entry;
788 regs->ps = 8;
789 regs->usp = infop->start_stack;
7a3148a9
JM		 790}
791
7a3148a9
JM		 792#define ELF_EXEC_PAGESIZE 8192
793
794#endif /* TARGET_ALPHA */
795
15338fd7
FB		 796#ifndef ELF_PLATFORM
797#define ELF_PLATFORM (NULL)
798#endif
799
800#ifndef ELF_HWCAP
801#define ELF_HWCAP 0
802#endif
803
992f48a0 804#ifdef TARGET_ABI32
cb33da57 805#undef ELF_CLASS
992f48a0 806#define ELF_CLASS ELFCLASS32
cb33da57
BS		 807#undef bswaptls
808#define bswaptls(ptr) bswap32s(ptr)
809#endif
810
31e31b8a 811#include "elf.h"
09bfb054 812
09bfb054
FB		 813struct exec
814{
d97ef72e
RH		 815 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
816 unsigned int a_text; /* length of text, in bytes */
817 unsigned int a_data; /* length of data, in bytes */
818 unsigned int a_bss; /* length of uninitialized data area, in bytes */
819 unsigned int a_syms; /* length of symbol table data in file, in bytes */
820 unsigned int a_entry; /* start address */
821 unsigned int a_trsize; /* length of relocation info for text, in bytes */
822 unsigned int a_drsize; /* length of relocation info for data, in bytes */
09bfb054
FB		 823};
824
825
826#define N_MAGIC(exec) ((exec).a_info & 0xffff)
827#define OMAGIC 0407
828#define NMAGIC 0410
829#define ZMAGIC 0413
830#define QMAGIC 0314
831
31e31b8a 832/* Necessary parameters */
54936004
FB		 833#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
834#define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1))
835#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
31e31b8a 836
15338fd7 837#define DLINFO_ITEMS 12
31e31b8a 838
09bfb054
FB		 839static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
840{
d97ef72e 841 memcpy(to, from, n);
09bfb054 842}
d691f669 843
31e31b8a 844#ifdef BSWAP_NEEDED
92a31b1f 845static void bswap_ehdr(struct elfhdr *ehdr)
31e31b8a 846{
d97ef72e
RH		 847 bswap16s(&ehdr->e_type); /* Object file type */
848 bswap16s(&ehdr->e_machine); /* Architecture */
849 bswap32s(&ehdr->e_version); /* Object file version */
850 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
851 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
852 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
853 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
854 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
855 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
856 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
857 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
858 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
859 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
31e31b8a
FB		 860}
861
991f8f0c 862static void bswap_phdr(struct elf_phdr *phdr, int phnum)
31e31b8a 863{
991f8f0c
RH		 864 int i;
865 for (i = 0; i < phnum; ++i, ++phdr) {
866 bswap32s(&phdr->p_type); /* Segment type */
867 bswap32s(&phdr->p_flags); /* Segment flags */
868 bswaptls(&phdr->p_offset); /* Segment file offset */
869 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
870 bswaptls(&phdr->p_paddr); /* Segment physical address */
871 bswaptls(&phdr->p_filesz); /* Segment size in file */
872 bswaptls(&phdr->p_memsz); /* Segment size in memory */
873 bswaptls(&phdr->p_align); /* Segment alignment */
874 }
31e31b8a 875}
689f936f 876
991f8f0c 877static void bswap_shdr(struct elf_shdr *shdr, int shnum)
689f936f 878{
991f8f0c
RH		 879 int i;
880 for (i = 0; i < shnum; ++i, ++shdr) {
881 bswap32s(&shdr->sh_name);
882 bswap32s(&shdr->sh_type);
883 bswaptls(&shdr->sh_flags);
884 bswaptls(&shdr->sh_addr);
885 bswaptls(&shdr->sh_offset);
886 bswaptls(&shdr->sh_size);
887 bswap32s(&shdr->sh_link);
888 bswap32s(&shdr->sh_info);
889 bswaptls(&shdr->sh_addralign);
890 bswaptls(&shdr->sh_entsize);
891 }
689f936f
FB		 892}
893
7a3148a9 894static void bswap_sym(struct elf_sym *sym)
689f936f
FB		 895{
896 bswap32s(&sym->st_name);
7a3148a9
JM		 897 bswaptls(&sym->st_value);
898 bswaptls(&sym->st_size);
689f936f
FB		 899 bswap16s(&sym->st_shndx);
900}
991f8f0c
RH		 901#else
902static inline void bswap_ehdr(struct elfhdr *ehdr) { }
903static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
904static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
905static inline void bswap_sym(struct elf_sym *sym) { }
31e31b8a
FB		 906#endif
907
edf8e2af
MW		 908#ifdef USE_ELF_CORE_DUMP
909static int elf_core_dump(int, const CPUState *);
edf8e2af 910#endif /* USE_ELF_CORE_DUMP */
682674b8 911static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
edf8e2af 912
9058abdd
RH		 913/* Verify the portions of EHDR within E_IDENT for the target.
914 This can be performed before bswapping the entire header. */
915static bool elf_check_ident(struct elfhdr *ehdr)
916{
917 return (ehdr->e_ident[EI_MAG0] == ELFMAG0
918 && ehdr->e_ident[EI_MAG1] == ELFMAG1
919 && ehdr->e_ident[EI_MAG2] == ELFMAG2
920 && ehdr->e_ident[EI_MAG3] == ELFMAG3
921 && ehdr->e_ident[EI_CLASS] == ELF_CLASS
922 && ehdr->e_ident[EI_DATA] == ELF_DATA
923 && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
924}
925
926/* Verify the portions of EHDR outside of E_IDENT for the target.
927 This has to wait until after bswapping the header. */
928static bool elf_check_ehdr(struct elfhdr *ehdr)
929{
930 return (elf_check_arch(ehdr->e_machine)
931 && ehdr->e_ehsize == sizeof(struct elfhdr)
932 && ehdr->e_phentsize == sizeof(struct elf_phdr)
933 && ehdr->e_shentsize == sizeof(struct elf_shdr)
934 && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
935}
936
31e31b8a 937/*
e5fe0c52 938 * 'copy_elf_strings()' copies argument/envelope strings from user
31e31b8a
FB		 939 * memory to free pages in kernel mem. These are in a format ready
940 * to be put directly into the top of new user memory.
941 *
942 */
992f48a0
BS		 943static abi_ulong copy_elf_strings(int argc,char ** argv, void **page,
944 abi_ulong p)
31e31b8a
FB		 945{
946 char *tmp, *tmp1, *pag = NULL;
947 int len, offset = 0;
948
949 if (!p) {
d97ef72e 950 return 0; /* bullet-proofing */
31e31b8a
FB		 951 }
952 while (argc-- > 0) {
edf779ff
FB		 953 tmp = argv[argc];
954 if (!tmp) {
d97ef72e
RH		 955 fprintf(stderr, "VFS: argc is wrong");
956 exit(-1);
957 }
edf779ff 958 tmp1 = tmp;
d97ef72e
RH		 959 while (*tmp++);
960 len = tmp - tmp1;
961 if (p < len) { /* this shouldn't happen - 128kB */
962 return 0;
963 }
964 while (len) {
965 --p; --tmp; --len;
966 if (--offset < 0) {
967 offset = p % TARGET_PAGE_SIZE;
53a5960a 968 pag = (char *)page[p/TARGET_PAGE_SIZE];
44a91cae 969 if (!pag) {
53a5960a 970 pag = (char *)malloc(TARGET_PAGE_SIZE);
4118a970 971 memset(pag, 0, TARGET_PAGE_SIZE);
53a5960a 972 page[p/TARGET_PAGE_SIZE] = pag;
44a91cae
FB		 973 if (!pag)
974 return 0;
d97ef72e
RH		 975 }
976 }
977 if (len == 0 || offset == 0) {
978 *(pag + offset) = *tmp;
979 }
980 else {
981 int bytes_to_copy = (len > offset) ? offset : len;
982 tmp -= bytes_to_copy;
983 p -= bytes_to_copy;
984 offset -= bytes_to_copy;
985 len -= bytes_to_copy;
986 memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
987 }
988 }
31e31b8a
FB		 989 }
990 return p;
991}
992
992f48a0
BS		 993static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm,
994 struct image_info *info)
53a5960a 995{
60dcbcb5 996 abi_ulong stack_base, size, error, guard;
31e31b8a 997 int i;
31e31b8a 998
09bfb054 999 /* Create enough stack to hold everything. If we don't use
60dcbcb5 1000 it for args, we'll use it for something else. */
703e0e89 1001 size = guest_stack_size;
60dcbcb5 1002 if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE) {
54936004 1003 size = MAX_ARG_PAGES*TARGET_PAGE_SIZE;
60dcbcb5
RH		 1004 }
1005 guard = TARGET_PAGE_SIZE;
1006 if (guard < qemu_real_host_page_size) {
1007 guard = qemu_real_host_page_size;
1008 }
1009
1010 error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
1011 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
09bfb054 1012 if (error == -1) {
60dcbcb5 1013 perror("mmap stack");
09bfb054
FB		 1014 exit(-1);
1015 }
31e31b8a 1016
60dcbcb5
RH		 1017 /* We reserve one extra page at the top of the stack as guard. */
1018 target_mprotect(error, guard, PROT_NONE);
1019
1020 info->stack_limit = error + guard;
1021 stack_base = info->stack_limit + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
31e31b8a 1022 p += stack_base;
09bfb054 1023
31e31b8a 1024 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
d97ef72e
RH		 1025 if (bprm->page[i]) {
1026 info->rss++;
579a97f7 1027 /* FIXME - check return value of memcpy_to_target() for failure */
d97ef72e
RH		 1028 memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE);
1029 free(bprm->page[i]);
1030 }
53a5960a 1031 stack_base += TARGET_PAGE_SIZE;
31e31b8a
FB		 1032 }
1033 return p;
1034}
1035
cf129f3a
RH		 1036/* Map and zero the bss. We need to explicitly zero any fractional pages
1037 after the data section (i.e. bss). */
1038static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot)
31e31b8a 1039{
cf129f3a
RH		 1040 uintptr_t host_start, host_map_start, host_end;
1041
1042 last_bss = TARGET_PAGE_ALIGN(last_bss);
1043
1044 /* ??? There is confusion between qemu_real_host_page_size and
1045 qemu_host_page_size here and elsewhere in target_mmap, which
1046 may lead to the end of the data section mapping from the file
1047 not being mapped. At least there was an explicit test and
1048 comment for that here, suggesting that "the file size must
1049 be known". The comment probably pre-dates the introduction
1050 of the fstat system call in target_mmap which does in fact
1051 find out the size. What isn't clear is if the workaround
1052 here is still actually needed. For now, continue with it,
1053 but merge it with the "normal" mmap that would allocate the bss. */
1054
1055 host_start = (uintptr_t) g2h(elf_bss);
1056 host_end = (uintptr_t) g2h(last_bss);
1057 host_map_start = (host_start + qemu_real_host_page_size - 1);
1058 host_map_start &= -qemu_real_host_page_size;
1059
1060 if (host_map_start < host_end) {
1061 void *p = mmap((void *)host_map_start, host_end - host_map_start,
1062 prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1063 if (p == MAP_FAILED) {
1064 perror("cannot mmap brk");
1065 exit(-1);
853d6f7a
FB		 1066 }
1067
cf129f3a
RH		 1068 /* Since we didn't use target_mmap, make sure to record
1069 the validity of the pages with qemu. */
1070 page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot|PAGE_VALID);
1071 }
31e31b8a 1072
cf129f3a
RH		 1073 if (host_start < host_map_start) {
1074 memset((void *)host_start, 0, host_map_start - host_start);
1075 }
1076}
53a5960a 1077
992f48a0 1078static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
8e62a717
RH		 1079 struct elfhdr *exec,
1080 struct image_info *info,
1081 struct image_info *interp_info)
31e31b8a 1082{
d97ef72e
RH		 1083 abi_ulong sp;
1084 int size;
1085 abi_ulong u_platform;
1086 const char *k_platform;
1087 const int n = sizeof(elf_addr_t);
1088
1089 sp = p;
1090 u_platform = 0;
1091 k_platform = ELF_PLATFORM;
1092 if (k_platform) {
1093 size_t len = strlen(k_platform) + 1;
1094 sp -= (len + n - 1) & ~(n - 1);
1095 u_platform = sp;
1096 /* FIXME - check return value of memcpy_to_target() for failure */
1097 memcpy_to_target(sp, k_platform, len);
1098 }
1099 /*
1100 * Force 16 byte _final_ alignment here for generality.
1101 */
1102 sp = sp &~ (abi_ulong)15;
1103 size = (DLINFO_ITEMS + 1) * 2;
1104 if (k_platform)
1105 size += 2;
f5155289 1106#ifdef DLINFO_ARCH_ITEMS
d97ef72e 1107 size += DLINFO_ARCH_ITEMS * 2;
f5155289 1108#endif
d97ef72e 1109 size += envc + argc + 2;
b9329d4b 1110 size += 1; /* argc itself */
d97ef72e
RH		 1111 size *= n;
1112 if (size & 15)
1113 sp -= 16 - (size & 15);
1114
1115 /* This is correct because Linux defines
1116 * elf_addr_t as Elf32_Off / Elf64_Off
1117 */
1118#define NEW_AUX_ENT(id, val) do { \
1119 sp -= n; put_user_ual(val, sp); \
1120 sp -= n; put_user_ual(id, sp); \
1121 } while(0)
1122
1123 NEW_AUX_ENT (AT_NULL, 0);
1124
1125 /* There must be exactly DLINFO_ITEMS entries here. */
8e62a717 1126 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff));
d97ef72e
RH		 1127 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
1128 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
1129 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
8e62a717 1130 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
d97ef72e 1131 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
8e62a717 1132 NEW_AUX_ENT(AT_ENTRY, info->entry);
d97ef72e
RH		 1133 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
1134 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
1135 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
1136 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
1137 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
1138 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
1139 if (k_platform)
1140 NEW_AUX_ENT(AT_PLATFORM, u_platform);
f5155289 1141#ifdef ARCH_DLINFO
d97ef72e
RH		 1142 /*
1143 * ARCH_DLINFO must come last so platform specific code can enforce
1144 * special alignment requirements on the AUXV if necessary (eg. PPC).
1145 */
1146 ARCH_DLINFO;
f5155289
FB		 1147#endif
1148#undef NEW_AUX_ENT
1149
d97ef72e 1150 info->saved_auxv = sp;
edf8e2af 1151
b9329d4b 1152 sp = loader_build_argptr(envc, argc, sp, p, 0);
d97ef72e 1153 return sp;
31e31b8a
FB		 1154}
1155
8e62a717 1156/* Load an ELF image into the address space.
31e31b8a 1157
8e62a717
RH		 1158 IMAGE_NAME is the filename of the image, to use in error messages.
1159 IMAGE_FD is the open file descriptor for the image.
1160
1161 BPRM_BUF is a copy of the beginning of the file; this of course
1162 contains the elf file header at offset 0. It is assumed that this
1163 buffer is sufficiently aligned to present no problems to the host
1164 in accessing data at aligned offsets within the buffer.
1165
1166 On return: INFO values will be filled in, as necessary or available. */
1167
1168static void load_elf_image(const char *image_name, int image_fd,
bf858897 1169 struct image_info *info, char **pinterp_name,
8e62a717 1170 char bprm_buf[BPRM_BUF_SIZE])
31e31b8a 1171{
8e62a717
RH		 1172 struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
1173 struct elf_phdr *phdr;
1174 abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
1175 int i, retval;
1176 const char *errmsg;
5fafdf24 1177
8e62a717
RH		 1178 /* First of all, some simple consistency checks */
1179 errmsg = "Invalid ELF image for this architecture";
1180 if (!elf_check_ident(ehdr)) {
1181 goto exit_errmsg;
1182 }
1183 bswap_ehdr(ehdr);
1184 if (!elf_check_ehdr(ehdr)) {
1185 goto exit_errmsg;
d97ef72e 1186 }
5fafdf24 1187
8e62a717
RH		 1188 i = ehdr->e_phnum * sizeof(struct elf_phdr);
1189 if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
1190 phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
9955ffac 1191 } else {
8e62a717
RH		 1192 phdr = (struct elf_phdr *) alloca(i);
1193 retval = pread(image_fd, phdr, i, ehdr->e_phoff);
9955ffac 1194 if (retval != i) {
8e62a717 1195 goto exit_read;
9955ffac 1196 }
d97ef72e 1197 }
8e62a717 1198 bswap_phdr(phdr, ehdr->e_phnum);
09bfb054 1199
682674b8
RH		 1200 /* Find the maximum size of the image and allocate an appropriate
1201 amount of memory to handle that. */
1202 loaddr = -1, hiaddr = 0;
8e62a717
RH		 1203 for (i = 0; i < ehdr->e_phnum; ++i) {
1204 if (phdr[i].p_type == PT_LOAD) {
1205 abi_ulong a = phdr[i].p_vaddr;
682674b8
RH		 1206 if (a < loaddr) {
1207 loaddr = a;
1208 }
8e62a717 1209 a += phdr[i].p_memsz;
682674b8
RH		 1210 if (a > hiaddr) {
1211 hiaddr = a;
1212 }
1213 }
1214 }
1215
1216 load_addr = loaddr;
8e62a717 1217 if (ehdr->e_type == ET_DYN) {
682674b8
RH		 1218 /* The image indicates that it can be loaded anywhere. Find a
1219 location that can hold the memory space required. If the
1220 image is pre-linked, LOADDR will be non-zero. Since we do
1221 not supply MAP_FIXED here we'll use that address if and
1222 only if it remains available. */
1223 load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
1224 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
1225 -1, 0);
1226 if (load_addr == -1) {
8e62a717 1227 goto exit_perror;
d97ef72e 1228 }
bf858897
RH		 1229 } else if (pinterp_name != NULL) {
1230 /* This is the main executable. Make sure that the low
1231 address does not conflict with MMAP_MIN_ADDR or the
1232 QEMU application itself. */
1233#if defined(CONFIG_USE_GUEST_BASE)
1234 /*
1235 * In case where user has not explicitly set the guest_base, we
1236 * probe here that should we set it automatically.
1237 */
1238 if (!have_guest_base && !reserved_va) {
1239 unsigned long host_start, real_start, host_size;
1240
1241 /* Round addresses to page boundaries. */
1242 loaddr &= qemu_host_page_mask;
1243 hiaddr = HOST_PAGE_ALIGN(hiaddr);
1244
1245 if (loaddr < mmap_min_addr) {
1246 host_start = HOST_PAGE_ALIGN(mmap_min_addr);
1247 } else {
1248 host_start = loaddr;
1249 if (host_start != loaddr) {
1250 errmsg = "Address overflow loading ELF binary";
1251 goto exit_errmsg;
1252 }
1253 }
1254 host_size = hiaddr - loaddr;
1255 while (1) {
1256 /* Do not use mmap_find_vma here because that is limited to the
1257 guest address space. We are going to make the
1258 guest address space fit whatever we're given. */
1259 real_start = (unsigned long)
1260 mmap((void *)host_start, host_size, PROT_NONE,
1261 MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE, -1, 0);
1262 if (real_start == (unsigned long)-1) {
1263 goto exit_perror;
1264 }
1265 if (real_start == host_start) {
1266 break;
1267 }
1268 /* That address didn't work. Unmap and try a different one.
1269 The address the host picked because is typically right at
1270 the top of the host address space and leaves the guest with
1271 no usable address space. Resort to a linear search. We
1272 already compensated for mmap_min_addr, so this should not
1273 happen often. Probably means we got unlucky and host
1274 address space randomization put a shared library somewhere
1275 inconvenient. */
1276 munmap((void *)real_start, host_size);
1277 host_start += qemu_host_page_size;
1278 if (host_start == loaddr) {
1279 /* Theoretically possible if host doesn't have any suitably
1280 aligned areas. Normally the first mmap will fail. */
1281 errmsg = "Unable to find space for application";
1282 goto exit_errmsg;
1283 }
1284 }
1285 qemu_log("Relocating guest address space from 0x"
1286 TARGET_ABI_FMT_lx " to 0x%lx\n", loaddr, real_start);
1287 guest_base = real_start - loaddr;
1288 }
1289#endif
d97ef72e 1290 }
682674b8 1291 load_bias = load_addr - loaddr;
d97ef72e 1292
8e62a717
RH		 1293 info->load_bias = load_bias;
1294 info->load_addr = load_addr;
1295 info->entry = ehdr->e_entry + load_bias;
1296 info->start_code = -1;
1297 info->end_code = 0;
1298 info->start_data = -1;
1299 info->end_data = 0;
1300 info->brk = 0;
1301
1302 for (i = 0; i < ehdr->e_phnum; i++) {
1303 struct elf_phdr *eppnt = phdr + i;
d97ef72e 1304 if (eppnt->p_type == PT_LOAD) {
682674b8 1305 abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em;
d97ef72e 1306 int elf_prot = 0;
d97ef72e
RH		 1307
1308 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
1309 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
1310 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
d97ef72e 1311
682674b8
RH		 1312 vaddr = load_bias + eppnt->p_vaddr;
1313 vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
1314 vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
1315
1316 error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po,
1317 elf_prot, MAP_PRIVATE | MAP_FIXED,
8e62a717 1318 image_fd, eppnt->p_offset - vaddr_po);
09bfb054 1319 if (error == -1) {
8e62a717 1320 goto exit_perror;
09bfb054 1321 }
09bfb054 1322
682674b8
RH		 1323 vaddr_ef = vaddr + eppnt->p_filesz;
1324 vaddr_em = vaddr + eppnt->p_memsz;
31e31b8a 1325
cf129f3a 1326 /* If the load segment requests extra zeros (e.g. bss), map it. */
682674b8
RH		 1327 if (vaddr_ef < vaddr_em) {
1328 zero_bss(vaddr_ef, vaddr_em, elf_prot);
cf129f3a 1329 }
8e62a717
RH		 1330
1331 /* Find the full program boundaries. */
1332 if (elf_prot & PROT_EXEC) {
1333 if (vaddr < info->start_code) {
1334 info->start_code = vaddr;
1335 }
1336 if (vaddr_ef > info->end_code) {
1337 info->end_code = vaddr_ef;
1338 }
1339 }
1340 if (elf_prot & PROT_WRITE) {
1341 if (vaddr < info->start_data) {
1342 info->start_data = vaddr;
1343 }
1344 if (vaddr_ef > info->end_data) {
1345 info->end_data = vaddr_ef;
1346 }
1347 if (vaddr_em > info->brk) {
1348 info->brk = vaddr_em;
1349 }
1350 }
bf858897
RH		 1351 } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
1352 char *interp_name;
1353
1354 if (*pinterp_name) {
1355 errmsg = "Multiple PT_INTERP entries";
1356 goto exit_errmsg;
1357 }
1358 interp_name = malloc(eppnt->p_filesz);
1359 if (!interp_name) {
1360 goto exit_perror;
1361 }
1362
1363 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
1364 memcpy(interp_name, bprm_buf + eppnt->p_offset,
1365 eppnt->p_filesz);
1366 } else {
1367 retval = pread(image_fd, interp_name, eppnt->p_filesz,
1368 eppnt->p_offset);
1369 if (retval != eppnt->p_filesz) {
1370 goto exit_perror;
1371 }
1372 }
1373 if (interp_name[eppnt->p_filesz - 1] != 0) {
1374 errmsg = "Invalid PT_INTERP entry";
1375 goto exit_errmsg;
1376 }
1377 *pinterp_name = interp_name;
d97ef72e 1378 }
682674b8 1379 }
5fafdf24 1380
8e62a717
RH		 1381 if (info->end_data == 0) {
1382 info->start_data = info->end_code;
1383 info->end_data = info->end_code;
1384 info->brk = info->end_code;
1385 }
1386
682674b8 1387 if (qemu_log_enabled()) {
8e62a717 1388 load_symbols(ehdr, image_fd, load_bias);
682674b8 1389 }
31e31b8a 1390
8e62a717
RH		 1391 close(image_fd);
1392 return;
1393
1394 exit_read:
1395 if (retval >= 0) {
1396 errmsg = "Incomplete read of file header";
1397 goto exit_errmsg;
1398 }
1399 exit_perror:
1400 errmsg = strerror(errno);
1401 exit_errmsg:
1402 fprintf(stderr, "%s: %s\n", image_name, errmsg);
1403 exit(-1);
1404}
1405
1406static void load_elf_interp(const char *filename, struct image_info *info,
1407 char bprm_buf[BPRM_BUF_SIZE])
1408{
1409 int fd, retval;
1410
1411 fd = open(path(filename), O_RDONLY);
1412 if (fd < 0) {
1413 goto exit_perror;
1414 }
31e31b8a 1415
8e62a717
RH		 1416 retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
1417 if (retval < 0) {
1418 goto exit_perror;
1419 }
1420 if (retval < BPRM_BUF_SIZE) {
1421 memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
1422 }
1423
bf858897 1424 load_elf_image(filename, fd, info, NULL, bprm_buf);
8e62a717
RH		 1425 return;
1426
1427 exit_perror:
1428 fprintf(stderr, "%s: %s\n", filename, strerror(errno));
1429 exit(-1);
31e31b8a
FB		 1430}
1431
49918a75
PB		 1432static int symfind(const void *s0, const void *s1)
1433{
1434 struct elf_sym *key = (struct elf_sym *)s0;
1435 struct elf_sym *sym = (struct elf_sym *)s1;
1436 int result = 0;
1437 if (key->st_value < sym->st_value) {
1438 result = -1;
ec822001 1439 } else if (key->st_value >= sym->st_value + sym->st_size) {
49918a75
PB		 1440 result = 1;
1441 }
1442 return result;
1443}
1444
1445static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
1446{
1447#if ELF_CLASS == ELFCLASS32
1448 struct elf_sym *syms = s->disas_symtab.elf32;
1449#else
1450 struct elf_sym *syms = s->disas_symtab.elf64;
1451#endif
1452
1453 // binary search
1454 struct elf_sym key;
1455 struct elf_sym *sym;
1456
1457 key.st_value = orig_addr;
1458
1459 sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), symfind);
7cba04f6 1460 if (sym != NULL) {
49918a75
PB		 1461 return s->disas_strtab + sym->st_name;
1462 }
1463
1464 return "";
1465}
1466
1467/* FIXME: This should use elf_ops.h */
1468static int symcmp(const void *s0, const void *s1)
1469{
1470 struct elf_sym *sym0 = (struct elf_sym *)s0;
1471 struct elf_sym *sym1 = (struct elf_sym *)s1;
1472 return (sym0->st_value < sym1->st_value)
1473 ? -1
1474 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
1475}
1476
689f936f 1477/* Best attempt to load symbols from this ELF object. */
682674b8 1478static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
689f936f 1479{
682674b8
RH		 1480 int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
1481 struct elf_shdr *shdr;
689f936f 1482 char *strings;
e80cfcfc 1483 struct syminfo *s;
eee37d31 1484 struct elf_sym *syms, *new_syms;
689f936f 1485
682674b8
RH		 1486 shnum = hdr->e_shnum;
1487 i = shnum * sizeof(struct elf_shdr);
1488 shdr = (struct elf_shdr *)alloca(i);
1489 if (pread(fd, shdr, i, hdr->e_shoff) != i) {
1490 return;
1491 }
1492
1493 bswap_shdr(shdr, shnum);
1494 for (i = 0; i < shnum; ++i) {
1495 if (shdr[i].sh_type == SHT_SYMTAB) {
1496 sym_idx = i;
1497 str_idx = shdr[i].sh_link;
49918a75
PB		 1498 goto found;
1499 }
689f936f 1500 }
682674b8
RH		 1501
1502 /* There will be no symbol table if the file was stripped. */
1503 return;
689f936f
FB		 1504
1505 found:
682674b8 1506 /* Now know where the strtab and symtab are. Snarf them. */
e80cfcfc 1507 s = malloc(sizeof(*s));
682674b8 1508 if (!s) {
49918a75 1509 return;
682674b8 1510 }
5fafdf24 1511
682674b8
RH		 1512 i = shdr[str_idx].sh_size;
1513 s->disas_strtab = strings = malloc(i);
1514 if (!strings || pread(fd, strings, i, shdr[str_idx].sh_offset) != i) {
1515 free(s);
1516 free(strings);
49918a75 1517 return;
682674b8 1518 }
49918a75 1519
682674b8
RH		 1520 i = shdr[sym_idx].sh_size;
1521 syms = malloc(i);
1522 if (!syms || pread(fd, syms, i, shdr[sym_idx].sh_offset) != i) {
1523 free(s);
1524 free(strings);
1525 free(syms);
1526 return;
1527 }
31e31b8a 1528
682674b8
RH		 1529 nsyms = i / sizeof(struct elf_sym);
1530 for (i = 0; i < nsyms; ) {
49918a75 1531 bswap_sym(syms + i);
682674b8
RH		 1532 /* Throw away entries which we do not need. */
1533 if (syms[i].st_shndx == SHN_UNDEF
1534 || syms[i].st_shndx >= SHN_LORESERVE
1535 || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
1536 if (i < --nsyms) {
49918a75
PB		 1537 syms[i] = syms[nsyms];
1538 }
682674b8 1539 } else {
49918a75 1540#if defined(TARGET_ARM) || defined (TARGET_MIPS)
682674b8
RH		 1541 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
1542 syms[i].st_value &= ~(target_ulong)1;
0774bed1 1543#endif
682674b8
RH		 1544 syms[i].st_value += load_bias;
1545 i++;
1546 }
0774bed1 1547 }
49918a75 1548
5d5c9930
RH		 1549 /* Attempt to free the storage associated with the local symbols
1550 that we threw away. Whether or not this has any effect on the
1551 memory allocation depends on the malloc implementation and how
1552 many symbols we managed to discard. */
eee37d31
SW		 1553 new_syms = realloc(syms, nsyms * sizeof(*syms));
1554 if (new_syms == NULL) {
5d5c9930 1555 free(s);
eee37d31 1556 free(syms);
5d5c9930
RH		 1557 free(strings);
1558 return;
1559 }
eee37d31 1560 syms = new_syms;
5d5c9930 1561
49918a75 1562 qsort(syms, nsyms, sizeof(*syms), symcmp);
689f936f 1563
49918a75
PB		 1564 s->disas_num_syms = nsyms;
1565#if ELF_CLASS == ELFCLASS32
1566 s->disas_symtab.elf32 = syms;
49918a75
PB		 1567#else
1568 s->disas_symtab.elf64 = syms;
49918a75 1569#endif
682674b8 1570 s->lookup_symbol = lookup_symbolxx;
e80cfcfc
FB		 1571 s->next = syminfos;
1572 syminfos = s;
689f936f 1573}
31e31b8a 1574
e5fe0c52
PB		 1575int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
1576 struct image_info * info)
31e31b8a 1577{
8e62a717 1578 struct image_info interp_info;
31e31b8a 1579 struct elfhdr elf_ex;
8e62a717 1580 char *elf_interpreter = NULL;
31e31b8a 1581
bf858897
RH		 1582 info->start_mmap = (abi_ulong)ELF_START_MMAP;
1583 info->mmap = 0;
1584 info->rss = 0;
1585
1586 load_elf_image(bprm->filename, bprm->fd, info,
1587 &elf_interpreter, bprm->buf);
31e31b8a 1588
bf858897
RH		 1589 /* ??? We need a copy of the elf header for passing to create_elf_tables.
1590 If we do nothing, we'll have overwritten this when we re-use bprm->buf
1591 when we load the interpreter. */
1592 elf_ex = *(struct elfhdr *)bprm->buf;
31e31b8a 1593
e5fe0c52
PB		 1594 bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
1595 bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p);
1596 bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p);
1597 if (!bprm->p) {
bf858897
RH		 1598 fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
1599 exit(-1);
379f6698 1600 }
379f6698 1601
31e31b8a
FB		 1602 /* Do this so that we can load the interpreter, if need be. We will
1603 change some of these later */
31e31b8a 1604 bprm->p = setup_arg_pages(bprm->p, bprm, info);
31e31b8a 1605
8e62a717
RH		 1606 if (elf_interpreter) {
1607 load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
31e31b8a 1608
8e62a717
RH		 1609 /* If the program interpreter is one of these two, then assume
1610 an iBCS2 image. Otherwise assume a native linux image. */
1611
1612 if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
1613 || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
1614 info->personality = PER_SVR4;
31e31b8a 1615
8e62a717
RH		 1616 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
1617 and some applications "depend" upon this behavior. Since
1618 we do not have the power to recompile these, we emulate
1619 the SVr4 behavior. Sigh. */
1620 target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
1621 MAP_FIXED | MAP_PRIVATE, -1, 0);
1622 }
31e31b8a
FB		 1623 }
1624
8e62a717
RH		 1625 bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
1626 info, (elf_interpreter ? &interp_info : NULL));
1627 info->start_stack = bprm->p;
1628
1629 /* If we have an interpreter, set that as the program's entry point.
1630 Copy the load_addr as well, to help PPC64 interpret the entry
1631 point as a function descriptor. Do this after creating elf tables
1632 so that we copy the original program entry point into the AUXV. */
1633 if (elf_interpreter) {
1634 info->load_addr = interp_info.load_addr;
1635 info->entry = interp_info.entry;
bf858897 1636 free(elf_interpreter);
8e62a717 1637 }
31e31b8a 1638
edf8e2af
MW		 1639#ifdef USE_ELF_CORE_DUMP
1640 bprm->core_dump = &elf_core_dump;
1641#endif
1642
31e31b8a
FB		 1643 return 0;
1644}
1645
edf8e2af 1646#ifdef USE_ELF_CORE_DUMP
edf8e2af
MW		 1647/*
1648 * Definitions to generate Intel SVR4-like core files.
a2547a13 1649 * These mostly have the same names as the SVR4 types with "target_elf_"
edf8e2af
MW		 1650 * tacked on the front to prevent clashes with linux definitions,
1651 * and the typedef forms have been avoided. This is mostly like
1652 * the SVR4 structure, but more Linuxy, with things that Linux does
1653 * not support and which gdb doesn't really use excluded.
1654 *
1655 * Fields we don't dump (their contents is zero) in linux-user qemu
1656 * are marked with XXX.
1657 *
1658 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
1659 *
1660 * Porting ELF coredump for target is (quite) simple process. First you
dd0a3651 1661 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
edf8e2af
MW		 1662 * the target resides):
1663 *
1664 * #define USE_ELF_CORE_DUMP
1665 *
1666 * Next you define type of register set used for dumping. ELF specification
1667 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
1668 *
c227f099 1669 * typedef <target_regtype> target_elf_greg_t;
edf8e2af 1670 * #define ELF_NREG <number of registers>
c227f099 1671 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 1672 *
edf8e2af
MW		 1673 * Last step is to implement target specific function that copies registers
1674 * from given cpu into just specified register set. Prototype is:
1675 *
c227f099 1676 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
a2547a13 1677 * const CPUState *env);
edf8e2af
MW		 1678 *
1679 * Parameters:
1680 * regs - copy register values into here (allocated and zeroed by caller)
1681 * env - copy registers from here
1682 *
1683 * Example for ARM target is provided in this file.
1684 */
1685
1686/* An ELF note in memory */
1687struct memelfnote {
1688 const char *name;
1689 size_t namesz;
1690 size_t namesz_rounded;
1691 int type;
1692 size_t datasz;
1693 void *data;
1694 size_t notesz;
1695};
1696
a2547a13 1697struct target_elf_siginfo {
edf8e2af
MW		 1698 int si_signo; /* signal number */
1699 int si_code; /* extra code */
1700 int si_errno; /* errno */
1701};
1702
a2547a13
LD		 1703struct target_elf_prstatus {
1704 struct target_elf_siginfo pr_info; /* Info associated with signal */
edf8e2af
MW		 1705 short pr_cursig; /* Current signal */
1706 target_ulong pr_sigpend; /* XXX */
1707 target_ulong pr_sighold; /* XXX */
c227f099
AL		 1708 target_pid_t pr_pid;
1709 target_pid_t pr_ppid;
1710 target_pid_t pr_pgrp;
1711 target_pid_t pr_sid;
edf8e2af
MW		 1712 struct target_timeval pr_utime; /* XXX User time */
1713 struct target_timeval pr_stime; /* XXX System time */
1714 struct target_timeval pr_cutime; /* XXX Cumulative user time */
1715 struct target_timeval pr_cstime; /* XXX Cumulative system time */
c227f099 1716 target_elf_gregset_t pr_reg; /* GP registers */
edf8e2af
MW		 1717 int pr_fpvalid; /* XXX */
1718};
1719
1720#define ELF_PRARGSZ (80) /* Number of chars for args */
1721
a2547a13 1722struct target_elf_prpsinfo {
edf8e2af
MW		 1723 char pr_state; /* numeric process state */
1724 char pr_sname; /* char for pr_state */
1725 char pr_zomb; /* zombie */
1726 char pr_nice; /* nice val */
1727 target_ulong pr_flag; /* flags */
c227f099
AL		 1728 target_uid_t pr_uid;
1729 target_gid_t pr_gid;
1730 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
edf8e2af
MW		 1731 /* Lots missing */
1732 char pr_fname[16]; /* filename of executable */
1733 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
1734};
1735
1736/* Here is the structure in which status of each thread is captured. */
1737struct elf_thread_status {
72cf2d4f 1738 QTAILQ_ENTRY(elf_thread_status) ets_link;
a2547a13 1739 struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
edf8e2af
MW		 1740#if 0
1741 elf_fpregset_t fpu; /* NT_PRFPREG */
1742 struct task_struct *thread;
1743 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
1744#endif
1745 struct memelfnote notes[1];
1746 int num_notes;
1747};
1748
1749struct elf_note_info {
1750 struct memelfnote *notes;
a2547a13
LD		 1751 struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
1752 struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
edf8e2af 1753
72cf2d4f 1754 QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list;
edf8e2af
MW		 1755#if 0
1756 /*
1757 * Current version of ELF coredump doesn't support
1758 * dumping fp regs etc.
1759 */
1760 elf_fpregset_t *fpu;
1761 elf_fpxregset_t *xfpu;
1762 int thread_status_size;
1763#endif
1764 int notes_size;
1765 int numnote;
1766};
1767
1768struct vm_area_struct {
1769 abi_ulong vma_start; /* start vaddr of memory region */
1770 abi_ulong vma_end; /* end vaddr of memory region */
1771 abi_ulong vma_flags; /* protection etc. flags for the region */
72cf2d4f 1772 QTAILQ_ENTRY(vm_area_struct) vma_link;
edf8e2af
MW		 1773};
1774
1775struct mm_struct {
72cf2d4f 1776 QTAILQ_HEAD(, vm_area_struct) mm_mmap;
edf8e2af
MW		 1777 int mm_count; /* number of mappings */
1778};
1779
1780static struct mm_struct *vma_init(void);
1781static void vma_delete(struct mm_struct *);
1782static int vma_add_mapping(struct mm_struct *, abi_ulong,
d97ef72e 1783 abi_ulong, abi_ulong);
edf8e2af
MW		 1784static int vma_get_mapping_count(const struct mm_struct *);
1785static struct vm_area_struct *vma_first(const struct mm_struct *);
1786static struct vm_area_struct *vma_next(struct vm_area_struct *);
1787static abi_ulong vma_dump_size(const struct vm_area_struct *);
b480d9b7 1788static int vma_walker(void *priv, abi_ulong start, abi_ulong end,
d97ef72e 1789 unsigned long flags);
edf8e2af
MW		 1790
1791static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
1792static void fill_note(struct memelfnote *, const char *, int,
d97ef72e 1793 unsigned int, void *);
a2547a13
LD		 1794static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
1795static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
edf8e2af
MW		 1796static void fill_auxv_note(struct memelfnote *, const TaskState *);
1797static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
1798static size_t note_size(const struct memelfnote *);
1799static void free_note_info(struct elf_note_info *);
1800static int fill_note_info(struct elf_note_info *, long, const CPUState *);
1801static void fill_thread_info(struct elf_note_info *, const CPUState *);
1802static int core_dump_filename(const TaskState *, char *, size_t);
1803
1804static int dump_write(int, const void *, size_t);
1805static int write_note(struct memelfnote *, int);
1806static int write_note_info(struct elf_note_info *, int);
1807
1808#ifdef BSWAP_NEEDED
a2547a13 1809static void bswap_prstatus(struct target_elf_prstatus *prstatus)
edf8e2af
MW		 1810{
1811 prstatus->pr_info.si_signo = tswapl(prstatus->pr_info.si_signo);
1812 prstatus->pr_info.si_code = tswapl(prstatus->pr_info.si_code);
1813 prstatus->pr_info.si_errno = tswapl(prstatus->pr_info.si_errno);
1814 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
1815 prstatus->pr_sigpend = tswapl(prstatus->pr_sigpend);
1816 prstatus->pr_sighold = tswapl(prstatus->pr_sighold);
1817 prstatus->pr_pid = tswap32(prstatus->pr_pid);
1818 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
1819 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
1820 prstatus->pr_sid = tswap32(prstatus->pr_sid);
1821 /* cpu times are not filled, so we skip them */
1822 /* regs should be in correct format already */
1823 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
1824}
1825
a2547a13 1826static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
edf8e2af
MW		 1827{
1828 psinfo->pr_flag = tswapl(psinfo->pr_flag);
1829 psinfo->pr_uid = tswap16(psinfo->pr_uid);
1830 psinfo->pr_gid = tswap16(psinfo->pr_gid);
1831 psinfo->pr_pid = tswap32(psinfo->pr_pid);
1832 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
1833 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
1834 psinfo->pr_sid = tswap32(psinfo->pr_sid);
1835}
991f8f0c
RH		 1836
1837static void bswap_note(struct elf_note *en)
1838{
1839 bswap32s(&en->n_namesz);
1840 bswap32s(&en->n_descsz);
1841 bswap32s(&en->n_type);
1842}
1843#else
1844static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
1845static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
1846static inline void bswap_note(struct elf_note *en) { }
edf8e2af
MW		 1847#endif /* BSWAP_NEEDED */
1848
1849/*
1850 * Minimal support for linux memory regions. These are needed
1851 * when we are finding out what memory exactly belongs to
1852 * emulated process. No locks needed here, as long as
1853 * thread that received the signal is stopped.
1854 */
1855
1856static struct mm_struct *vma_init(void)
1857{
1858 struct mm_struct *mm;
1859
1860 if ((mm = qemu_malloc(sizeof (*mm))) == NULL)
1861 return (NULL);
1862
1863 mm->mm_count = 0;
72cf2d4f 1864 QTAILQ_INIT(&mm->mm_mmap);
edf8e2af
MW		 1865
1866 return (mm);
1867}
1868
1869static void vma_delete(struct mm_struct *mm)
1870{
1871 struct vm_area_struct *vma;
1872
1873 while ((vma = vma_first(mm)) != NULL) {
72cf2d4f 1874 QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
edf8e2af
MW		 1875 qemu_free(vma);
1876 }
1877 qemu_free(mm);
1878}
1879
1880static int vma_add_mapping(struct mm_struct *mm, abi_ulong start,
d97ef72e 1881 abi_ulong end, abi_ulong flags)
edf8e2af
MW		 1882{
1883 struct vm_area_struct *vma;
1884
1885 if ((vma = qemu_mallocz(sizeof (*vma))) == NULL)
1886 return (-1);
1887
1888 vma->vma_start = start;
1889 vma->vma_end = end;
1890 vma->vma_flags = flags;
1891
72cf2d4f 1892 QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
edf8e2af
MW		 1893 mm->mm_count++;
1894
1895 return (0);
1896}
1897
1898static struct vm_area_struct *vma_first(const struct mm_struct *mm)
1899{
72cf2d4f 1900 return (QTAILQ_FIRST(&mm->mm_mmap));
edf8e2af
MW		 1901}
1902
1903static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
1904{
72cf2d4f 1905 return (QTAILQ_NEXT(vma, vma_link));
edf8e2af
MW		 1906}
1907
1908static int vma_get_mapping_count(const struct mm_struct *mm)
1909{
1910 return (mm->mm_count);
1911}
1912
1913/*
1914 * Calculate file (dump) size of given memory region.
1915 */
1916static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
1917{
1918 /* if we cannot even read the first page, skip it */
1919 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
1920 return (0);
1921
1922 /*
1923 * Usually we don't dump executable pages as they contain
1924 * non-writable code that debugger can read directly from
1925 * target library etc. However, thread stacks are marked
1926 * also executable so we read in first page of given region
1927 * and check whether it contains elf header. If there is
1928 * no elf header, we dump it.
1929 */
1930 if (vma->vma_flags & PROT_EXEC) {
1931 char page[TARGET_PAGE_SIZE];
1932
1933 copy_from_user(page, vma->vma_start, sizeof (page));
1934 if ((page[EI_MAG0] == ELFMAG0) &&
1935 (page[EI_MAG1] == ELFMAG1) &&
1936 (page[EI_MAG2] == ELFMAG2) &&
1937 (page[EI_MAG3] == ELFMAG3)) {
1938 /*
1939 * Mappings are possibly from ELF binary. Don't dump
1940 * them.
1941 */
1942 return (0);
1943 }
1944 }
1945
1946 return (vma->vma_end - vma->vma_start);
1947}
1948
b480d9b7 1949static int vma_walker(void *priv, abi_ulong start, abi_ulong end,
d97ef72e 1950 unsigned long flags)
edf8e2af
MW		 1951{
1952 struct mm_struct *mm = (struct mm_struct *)priv;
1953
edf8e2af
MW		 1954 vma_add_mapping(mm, start, end, flags);
1955 return (0);
1956}
1957
1958static void fill_note(struct memelfnote *note, const char *name, int type,
d97ef72e 1959 unsigned int sz, void *data)
edf8e2af
MW		 1960{
1961 unsigned int namesz;
1962
1963 namesz = strlen(name) + 1;
1964 note->name = name;
1965 note->namesz = namesz;
1966 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
1967 note->type = type;
1968 note->datasz = roundup(sz, sizeof (int32_t));;
1969 note->data = data;
1970
1971 /*
1972 * We calculate rounded up note size here as specified by
1973 * ELF document.
1974 */
1975 note->notesz = sizeof (struct elf_note) +
1976 note->namesz_rounded + note->datasz;
1977}
1978
1979static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
d97ef72e 1980 uint32_t flags)
edf8e2af
MW		 1981{
1982 (void) memset(elf, 0, sizeof(*elf));
1983
1984 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
1985 elf->e_ident[EI_CLASS] = ELF_CLASS;
1986 elf->e_ident[EI_DATA] = ELF_DATA;
1987 elf->e_ident[EI_VERSION] = EV_CURRENT;
1988 elf->e_ident[EI_OSABI] = ELF_OSABI;
1989
1990 elf->e_type = ET_CORE;
1991 elf->e_machine = machine;
1992 elf->e_version = EV_CURRENT;
1993 elf->e_phoff = sizeof(struct elfhdr);
1994 elf->e_flags = flags;
1995 elf->e_ehsize = sizeof(struct elfhdr);
1996 elf->e_phentsize = sizeof(struct elf_phdr);
1997 elf->e_phnum = segs;
1998
edf8e2af 1999 bswap_ehdr(elf);
edf8e2af
MW		 2000}
2001
2002static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
2003{
2004 phdr->p_type = PT_NOTE;
2005 phdr->p_offset = offset;
2006 phdr->p_vaddr = 0;
2007 phdr->p_paddr = 0;
2008 phdr->p_filesz = sz;
2009 phdr->p_memsz = 0;
2010 phdr->p_flags = 0;
2011 phdr->p_align = 0;
2012
991f8f0c 2013 bswap_phdr(phdr, 1);
edf8e2af
MW		 2014}
2015
2016static size_t note_size(const struct memelfnote *note)
2017{
2018 return (note->notesz);
2019}
2020
a2547a13 2021static void fill_prstatus(struct target_elf_prstatus *prstatus,
d97ef72e 2022 const TaskState *ts, int signr)
edf8e2af
MW		 2023{
2024 (void) memset(prstatus, 0, sizeof (*prstatus));
2025 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
2026 prstatus->pr_pid = ts->ts_tid;
2027 prstatus->pr_ppid = getppid();
2028 prstatus->pr_pgrp = getpgrp();
2029 prstatus->pr_sid = getsid(0);
2030
edf8e2af 2031 bswap_prstatus(prstatus);
edf8e2af
MW		 2032}
2033
a2547a13 2034static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
edf8e2af
MW		 2035{
2036 char *filename, *base_filename;
2037 unsigned int i, len;
2038
2039 (void) memset(psinfo, 0, sizeof (*psinfo));
2040
2041 len = ts->info->arg_end - ts->info->arg_start;
2042 if (len >= ELF_PRARGSZ)
2043 len = ELF_PRARGSZ - 1;
2044 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
2045 return -EFAULT;
2046 for (i = 0; i < len; i++)
2047 if (psinfo->pr_psargs[i] == 0)
2048 psinfo->pr_psargs[i] = ' ';
2049 psinfo->pr_psargs[len] = 0;
2050
2051 psinfo->pr_pid = getpid();
2052 psinfo->pr_ppid = getppid();
2053 psinfo->pr_pgrp = getpgrp();
2054 psinfo->pr_sid = getsid(0);
2055 psinfo->pr_uid = getuid();
2056 psinfo->pr_gid = getgid();
2057
2058 filename = strdup(ts->bprm->filename);
2059 base_filename = strdup(basename(filename));
2060 (void) strncpy(psinfo->pr_fname, base_filename,
d97ef72e 2061 sizeof(psinfo->pr_fname));
edf8e2af
MW		 2062 free(base_filename);
2063 free(filename);
2064
edf8e2af 2065 bswap_psinfo(psinfo);
edf8e2af
MW		 2066 return (0);
2067}
2068
2069static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
2070{
2071 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
2072 elf_addr_t orig_auxv = auxv;
2073 abi_ulong val;
2074 void *ptr;
2075 int i, len;
2076
2077 /*
2078 * Auxiliary vector is stored in target process stack. It contains
2079 * {type, value} pairs that we need to dump into note. This is not
2080 * strictly necessary but we do it here for sake of completeness.
2081 */
2082
2083 /* find out lenght of the vector, AT_NULL is terminator */
2084 i = len = 0;
2085 do {
2086 get_user_ual(val, auxv);
2087 i += 2;
2088 auxv += 2 * sizeof (elf_addr_t);
2089 } while (val != AT_NULL);
2090 len = i * sizeof (elf_addr_t);
2091
2092 /* read in whole auxv vector and copy it to memelfnote */
2093 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
2094 if (ptr != NULL) {
2095 fill_note(note, "CORE", NT_AUXV, len, ptr);
2096 unlock_user(ptr, auxv, len);
2097 }
2098}
2099
2100/*
2101 * Constructs name of coredump file. We have following convention
2102 * for the name:
2103 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
2104 *
2105 * Returns 0 in case of success, -1 otherwise (errno is set).
2106 */
2107static int core_dump_filename(const TaskState *ts, char *buf,
d97ef72e 2108 size_t bufsize)
edf8e2af
MW		 2109{
2110 char timestamp[64];
2111 char *filename = NULL;
2112 char *base_filename = NULL;
2113 struct timeval tv;
2114 struct tm tm;
2115
2116 assert(bufsize >= PATH_MAX);
2117
2118 if (gettimeofday(&tv, NULL) < 0) {
2119 (void) fprintf(stderr, "unable to get current timestamp: %s",
d97ef72e 2120 strerror(errno));
edf8e2af
MW		 2121 return (-1);
2122 }
2123
2124 filename = strdup(ts->bprm->filename);
2125 base_filename = strdup(basename(filename));
2126 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
d97ef72e 2127 localtime_r(&tv.tv_sec, &tm));
edf8e2af 2128 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
d97ef72e 2129 base_filename, timestamp, (int)getpid());
edf8e2af
MW		 2130 free(base_filename);
2131 free(filename);
2132
2133 return (0);
2134}
2135
2136static int dump_write(int fd, const void *ptr, size_t size)
2137{
2138 const char *bufp = (const char *)ptr;
2139 ssize_t bytes_written, bytes_left;
2140 struct rlimit dumpsize;
2141 off_t pos;
2142
2143 bytes_written = 0;
2144 getrlimit(RLIMIT_CORE, &dumpsize);
2145 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
2146 if (errno == ESPIPE) { /* not a seekable stream */
2147 bytes_left = size;
2148 } else {
2149 return pos;
2150 }
2151 } else {
2152 if (dumpsize.rlim_cur <= pos) {
2153 return -1;
2154 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
2155 bytes_left = size;
2156 } else {
2157 size_t limit_left=dumpsize.rlim_cur - pos;
2158 bytes_left = limit_left >= size ? size : limit_left ;
2159 }
2160 }
2161
2162 /*
2163 * In normal conditions, single write(2) should do but
2164 * in case of socket etc. this mechanism is more portable.
2165 */
2166 do {
2167 bytes_written = write(fd, bufp, bytes_left);
2168 if (bytes_written < 0) {
2169 if (errno == EINTR)
2170 continue;
2171 return (-1);
2172 } else if (bytes_written == 0) { /* eof */
2173 return (-1);
2174 }
2175 bufp += bytes_written;
2176 bytes_left -= bytes_written;
2177 } while (bytes_left > 0);
2178
2179 return (0);
2180}
2181
2182static int write_note(struct memelfnote *men, int fd)
2183{
2184 struct elf_note en;
2185
2186 en.n_namesz = men->namesz;
2187 en.n_type = men->type;
2188 en.n_descsz = men->datasz;
2189
edf8e2af 2190 bswap_note(&en);
edf8e2af
MW		 2191
2192 if (dump_write(fd, &en, sizeof(en)) != 0)
2193 return (-1);
2194 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
2195 return (-1);
2196 if (dump_write(fd, men->data, men->datasz) != 0)
2197 return (-1);
2198
2199 return (0);
2200}
2201
2202static void fill_thread_info(struct elf_note_info *info, const CPUState *env)
2203{
2204 TaskState *ts = (TaskState *)env->opaque;
2205 struct elf_thread_status *ets;
2206
2207 ets = qemu_mallocz(sizeof (*ets));
2208 ets->num_notes = 1; /* only prstatus is dumped */
2209 fill_prstatus(&ets->prstatus, ts, 0);
2210 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
2211 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
d97ef72e 2212 &ets->prstatus);
edf8e2af 2213
72cf2d4f 2214 QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
edf8e2af
MW		 2215
2216 info->notes_size += note_size(&ets->notes[0]);
2217}
2218
2219static int fill_note_info(struct elf_note_info *info,
d97ef72e 2220 long signr, const CPUState *env)
edf8e2af
MW		 2221{
2222#define NUMNOTES 3
2223 CPUState *cpu = NULL;
2224 TaskState *ts = (TaskState *)env->opaque;
2225 int i;
2226
2227 (void) memset(info, 0, sizeof (*info));
2228
72cf2d4f 2229 QTAILQ_INIT(&info->thread_list);
edf8e2af
MW		 2230
2231 info->notes = qemu_mallocz(NUMNOTES * sizeof (struct memelfnote));
2232 if (info->notes == NULL)
2233 return (-ENOMEM);
2234 info->prstatus = qemu_mallocz(sizeof (*info->prstatus));
2235 if (info->prstatus == NULL)
2236 return (-ENOMEM);
2237 info->psinfo = qemu_mallocz(sizeof (*info->psinfo));
2238 if (info->prstatus == NULL)
2239 return (-ENOMEM);
2240
2241 /*
2242 * First fill in status (and registers) of current thread
2243 * including process info & aux vector.
2244 */
2245 fill_prstatus(info->prstatus, ts, signr);
2246 elf_core_copy_regs(&info->prstatus->pr_reg, env);
2247 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
d97ef72e 2248 sizeof (*info->prstatus), info->prstatus);
edf8e2af
MW		 2249 fill_psinfo(info->psinfo, ts);
2250 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
d97ef72e 2251 sizeof (*info->psinfo), info->psinfo);
edf8e2af
MW		 2252 fill_auxv_note(&info->notes[2], ts);
2253 info->numnote = 3;
2254
2255 info->notes_size = 0;
2256 for (i = 0; i < info->numnote; i++)
2257 info->notes_size += note_size(&info->notes[i]);
2258
2259 /* read and fill status of all threads */
2260 cpu_list_lock();
2261 for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) {
2262 if (cpu == thread_env)
2263 continue;
2264 fill_thread_info(info, cpu);
2265 }
2266 cpu_list_unlock();
2267
2268 return (0);
2269}
2270
2271static void free_note_info(struct elf_note_info *info)
2272{
2273 struct elf_thread_status *ets;
2274
72cf2d4f
BS		 2275 while (!QTAILQ_EMPTY(&info->thread_list)) {
2276 ets = QTAILQ_FIRST(&info->thread_list);
2277 QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
edf8e2af
MW		 2278 qemu_free(ets);
2279 }
2280
2281 qemu_free(info->prstatus);
2282 qemu_free(info->psinfo);
2283 qemu_free(info->notes);
2284}
2285
2286static int write_note_info(struct elf_note_info *info, int fd)
2287{
2288 struct elf_thread_status *ets;
2289 int i, error = 0;
2290
2291 /* write prstatus, psinfo and auxv for current thread */
2292 for (i = 0; i < info->numnote; i++)
2293 if ((error = write_note(&info->notes[i], fd)) != 0)
2294 return (error);
2295
2296 /* write prstatus for each thread */
2297 for (ets = info->thread_list.tqh_first; ets != NULL;
d97ef72e 2298 ets = ets->ets_link.tqe_next) {
edf8e2af
MW		 2299 if ((error = write_note(&ets->notes[0], fd)) != 0)
2300 return (error);
2301 }
2302
2303 return (0);
2304}
2305
2306/*
2307 * Write out ELF coredump.
2308 *
2309 * See documentation of ELF object file format in:
2310 * http://www.caldera.com/developers/devspecs/gabi41.pdf
2311 *
2312 * Coredump format in linux is following:
2313 *
2314 * 0 +----------------------+ \
2315 * | ELF header | ET_CORE |
2316 * +----------------------+ |
2317 * | ELF program headers | |--- headers
2318 * | - NOTE section | |
2319 * | - PT_LOAD sections | |
2320 * +----------------------+ /
2321 * | NOTEs: |
2322 * | - NT_PRSTATUS |
2323 * | - NT_PRSINFO |
2324 * | - NT_AUXV |
2325 * +----------------------+ <-- aligned to target page
2326 * | Process memory dump |
2327 * : :
2328 * . .
2329 * : :
2330 * | |
2331 * +----------------------+
2332 *
2333 * NT_PRSTATUS -> struct elf_prstatus (per thread)
2334 * NT_PRSINFO -> struct elf_prpsinfo
2335 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
2336 *
2337 * Format follows System V format as close as possible. Current
2338 * version limitations are as follows:
2339 * - no floating point registers are dumped
2340 *
2341 * Function returns 0 in case of success, negative errno otherwise.
2342 *
2343 * TODO: make this work also during runtime: it should be
2344 * possible to force coredump from running process and then
2345 * continue processing. For example qemu could set up SIGUSR2
2346 * handler (provided that target process haven't registered
2347 * handler for that) that does the dump when signal is received.
2348 */
2349static int elf_core_dump(int signr, const CPUState *env)
2350{
2351 const TaskState *ts = (const TaskState *)env->opaque;
2352 struct vm_area_struct *vma = NULL;
2353 char corefile[PATH_MAX];
2354 struct elf_note_info info;
2355 struct elfhdr elf;
2356 struct elf_phdr phdr;
2357 struct rlimit dumpsize;
2358 struct mm_struct *mm = NULL;
2359 off_t offset = 0, data_offset = 0;
2360 int segs = 0;
2361 int fd = -1;
2362
2363 errno = 0;
2364 getrlimit(RLIMIT_CORE, &dumpsize);
2365 if (dumpsize.rlim_cur == 0)
d97ef72e 2366 return 0;
edf8e2af
MW		 2367
2368 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
2369 return (-errno);
2370
2371 if ((fd = open(corefile, O_WRONLY | O_CREAT,
d97ef72e 2372 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
edf8e2af
MW		 2373 return (-errno);
2374
2375 /*
2376 * Walk through target process memory mappings and
2377 * set up structure containing this information. After
2378 * this point vma_xxx functions can be used.
2379 */
2380 if ((mm = vma_init()) == NULL)
2381 goto out;
2382
2383 walk_memory_regions(mm, vma_walker);
2384 segs = vma_get_mapping_count(mm);
2385
2386 /*
2387 * Construct valid coredump ELF header. We also
2388 * add one more segment for notes.
2389 */
2390 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
2391 if (dump_write(fd, &elf, sizeof (elf)) != 0)
2392 goto out;
2393
2394 /* fill in in-memory version of notes */
2395 if (fill_note_info(&info, signr, env) < 0)
2396 goto out;
2397
2398 offset += sizeof (elf); /* elf header */
2399 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
2400
2401 /* write out notes program header */
2402 fill_elf_note_phdr(&phdr, info.notes_size, offset);
2403
2404 offset += info.notes_size;
2405 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
2406 goto out;
2407
2408 /*
2409 * ELF specification wants data to start at page boundary so
2410 * we align it here.
2411 */
2412 offset = roundup(offset, ELF_EXEC_PAGESIZE);
2413
2414 /*
2415 * Write program headers for memory regions mapped in
2416 * the target process.
2417 */
2418 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
2419 (void) memset(&phdr, 0, sizeof (phdr));
2420
2421 phdr.p_type = PT_LOAD;
2422 phdr.p_offset = offset;
2423 phdr.p_vaddr = vma->vma_start;
2424 phdr.p_paddr = 0;
2425 phdr.p_filesz = vma_dump_size(vma);
2426 offset += phdr.p_filesz;
2427 phdr.p_memsz = vma->vma_end - vma->vma_start;
2428 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
2429 if (vma->vma_flags & PROT_WRITE)
2430 phdr.p_flags |= PF_W;
2431 if (vma->vma_flags & PROT_EXEC)
2432 phdr.p_flags |= PF_X;
2433 phdr.p_align = ELF_EXEC_PAGESIZE;
2434
2435 dump_write(fd, &phdr, sizeof (phdr));
2436 }
2437
2438 /*
2439 * Next we write notes just after program headers. No
2440 * alignment needed here.
2441 */
2442 if (write_note_info(&info, fd) < 0)
2443 goto out;
2444
2445 /* align data to page boundary */
2446 data_offset = lseek(fd, 0, SEEK_CUR);
2447 data_offset = TARGET_PAGE_ALIGN(data_offset);
2448 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
2449 goto out;
2450
2451 /*
2452 * Finally we can dump process memory into corefile as well.
2453 */
2454 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
2455 abi_ulong addr;
2456 abi_ulong end;
2457
2458 end = vma->vma_start + vma_dump_size(vma);
2459
2460 for (addr = vma->vma_start; addr < end;
d97ef72e 2461 addr += TARGET_PAGE_SIZE) {
edf8e2af
MW		 2462 char page[TARGET_PAGE_SIZE];
2463 int error;
2464
2465 /*
2466 * Read in page from target process memory and
2467 * write it to coredump file.
2468 */
2469 error = copy_from_user(page, addr, sizeof (page));
2470 if (error != 0) {
49995e17 2471 (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
d97ef72e 2472 addr);
edf8e2af
MW		 2473 errno = -error;
2474 goto out;
2475 }
2476 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
2477 goto out;
2478 }
2479 }
2480
d97ef72e 2481 out:
edf8e2af
MW		 2482 free_note_info(&info);
2483 if (mm != NULL)
2484 vma_delete(mm);
2485 (void) close(fd);
2486
2487 if (errno != 0)
2488 return (-errno);
2489 return (0);
2490}
edf8e2af
MW		 2491#endif /* USE_ELF_CORE_DUMP */
2492
e5fe0c52
PB		 2493void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
2494{
2495 init_thread(regs, infop);
2496}
Qemu copy for testing