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linux-user: Sanitize interp_info and, for mips only, init field fp_abi
[mirror_qemu.git] / linux-user / elfload.c
1 /* This is the Linux kernel elf-loading code, ported into user space */
2 #include "qemu/osdep.h"
3 #include <sys/param.h>
4
5 #include <sys/resource.h>
6
7 #include "qemu.h"
8 #include "disas/disas.h"
9 #include "qemu/path.h"
10
11 #ifdef _ARCH_PPC64
12 #undef ARCH_DLINFO
13 #undef ELF_PLATFORM
14 #undef ELF_HWCAP
15 #undef ELF_HWCAP2
16 #undef ELF_CLASS
17 #undef ELF_DATA
18 #undef ELF_ARCH
19 #endif
20
21 #define ELF_OSABI ELFOSABI_SYSV
22
23 /* from personality.h */
24
25 /*
26 * Flags for bug emulation.
27 *
28 * These occupy the top three bytes.
29 */
30 enum {
31 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
32 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to
33 descriptors (signal handling) */
34 MMAP_PAGE_ZERO = 0x0100000,
35 ADDR_COMPAT_LAYOUT = 0x0200000,
36 READ_IMPLIES_EXEC = 0x0400000,
37 ADDR_LIMIT_32BIT = 0x0800000,
38 SHORT_INODE = 0x1000000,
39 WHOLE_SECONDS = 0x2000000,
40 STICKY_TIMEOUTS = 0x4000000,
41 ADDR_LIMIT_3GB = 0x8000000,
42 };
43
44 /*
45 * Personality types.
46 *
47 * These go in the low byte. Avoid using the top bit, it will
48 * conflict with error returns.
49 */
50 enum {
51 PER_LINUX = 0x0000,
52 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
53 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
54 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
55 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
56 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,
57 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
58 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
59 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
60 PER_BSD = 0x0006,
61 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
62 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
63 PER_LINUX32 = 0x0008,
64 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
65 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
66 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
67 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
68 PER_RISCOS = 0x000c,
69 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
70 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
71 PER_OSF4 = 0x000f, /* OSF/1 v4 */
72 PER_HPUX = 0x0010,
73 PER_MASK = 0x00ff,
74 };
75
76 /*
77 * Return the base personality without flags.
78 */
79 #define personality(pers) (pers & PER_MASK)
80
81 int info_is_fdpic(struct image_info *info)
82 {
83 return info->personality == PER_LINUX_FDPIC;
84 }
85
86 /* this flag is uneffective under linux too, should be deleted */
87 #ifndef MAP_DENYWRITE
88 #define MAP_DENYWRITE 0
89 #endif
90
91 /* should probably go in elf.h */
92 #ifndef ELIBBAD
93 #define ELIBBAD 80
94 #endif
95
96 #ifdef TARGET_WORDS_BIGENDIAN
97 #define ELF_DATA ELFDATA2MSB
98 #else
99 #define ELF_DATA ELFDATA2LSB
100 #endif
101
102 #ifdef TARGET_ABI_MIPSN32
103 typedef abi_ullong target_elf_greg_t;
104 #define tswapreg(ptr) tswap64(ptr)
105 #else
106 typedef abi_ulong target_elf_greg_t;
107 #define tswapreg(ptr) tswapal(ptr)
108 #endif
109
110 #ifdef USE_UID16
111 typedef abi_ushort target_uid_t;
112 typedef abi_ushort target_gid_t;
113 #else
114 typedef abi_uint target_uid_t;
115 typedef abi_uint target_gid_t;
116 #endif
117 typedef abi_int target_pid_t;
118
119 #ifdef TARGET_I386
120
121 #define ELF_PLATFORM get_elf_platform()
122
123 static const char *get_elf_platform(void)
124 {
125 static char elf_platform[] = "i386";
126 int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
127 if (family > 6)
128 family = 6;
129 if (family >= 3)
130 elf_platform[1] = '0' + family;
131 return elf_platform;
132 }
133
134 #define ELF_HWCAP get_elf_hwcap()
135
136 static uint32_t get_elf_hwcap(void)
137 {
138 X86CPU *cpu = X86_CPU(thread_cpu);
139
140 return cpu->env.features[FEAT_1_EDX];
141 }
142
143 #ifdef TARGET_X86_64
144 #define ELF_START_MMAP 0x2aaaaab000ULL
145
146 #define ELF_CLASS ELFCLASS64
147 #define ELF_ARCH EM_X86_64
148
149 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
150 {
151 regs->rax = 0;
152 regs->rsp = infop->start_stack;
153 regs->rip = infop->entry;
154 }
155
156 #define ELF_NREG 27
157 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
158
159 /*
160 * Note that ELF_NREG should be 29 as there should be place for
161 * TRAPNO and ERR "registers" as well but linux doesn't dump
162 * those.
163 *
164 * See linux kernel: arch/x86/include/asm/elf.h
165 */
166 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
167 {
168 (*regs)[0] = env->regs[15];
169 (*regs)[1] = env->regs[14];
170 (*regs)[2] = env->regs[13];
171 (*regs)[3] = env->regs[12];
172 (*regs)[4] = env->regs[R_EBP];
173 (*regs)[5] = env->regs[R_EBX];
174 (*regs)[6] = env->regs[11];
175 (*regs)[7] = env->regs[10];
176 (*regs)[8] = env->regs[9];
177 (*regs)[9] = env->regs[8];
178 (*regs)[10] = env->regs[R_EAX];
179 (*regs)[11] = env->regs[R_ECX];
180 (*regs)[12] = env->regs[R_EDX];
181 (*regs)[13] = env->regs[R_ESI];
182 (*regs)[14] = env->regs[R_EDI];
183 (*regs)[15] = env->regs[R_EAX]; /* XXX */
184 (*regs)[16] = env->eip;
185 (*regs)[17] = env->segs[R_CS].selector & 0xffff;
186 (*regs)[18] = env->eflags;
187 (*regs)[19] = env->regs[R_ESP];
188 (*regs)[20] = env->segs[R_SS].selector & 0xffff;
189 (*regs)[21] = env->segs[R_FS].selector & 0xffff;
190 (*regs)[22] = env->segs[R_GS].selector & 0xffff;
191 (*regs)[23] = env->segs[R_DS].selector & 0xffff;
192 (*regs)[24] = env->segs[R_ES].selector & 0xffff;
193 (*regs)[25] = env->segs[R_FS].selector & 0xffff;
194 (*regs)[26] = env->segs[R_GS].selector & 0xffff;
195 }
196
197 #else
198
199 #define ELF_START_MMAP 0x80000000
200
201 /*
202 * This is used to ensure we don't load something for the wrong architecture.
203 */
204 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
205
206 /*
207 * These are used to set parameters in the core dumps.
208 */
209 #define ELF_CLASS ELFCLASS32
210 #define ELF_ARCH EM_386
211
212 static inline void init_thread(struct target_pt_regs *regs,
213 struct image_info *infop)
214 {
215 regs->esp = infop->start_stack;
216 regs->eip = infop->entry;
217
218 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
219 starts %edx contains a pointer to a function which might be
220 registered using `atexit'. This provides a mean for the
221 dynamic linker to call DT_FINI functions for shared libraries
222 that have been loaded before the code runs.
223
224 A value of 0 tells we have no such handler. */
225 regs->edx = 0;
226 }
227
228 #define ELF_NREG 17
229 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
230
231 /*
232 * Note that ELF_NREG should be 19 as there should be place for
233 * TRAPNO and ERR "registers" as well but linux doesn't dump
234 * those.
235 *
236 * See linux kernel: arch/x86/include/asm/elf.h
237 */
238 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
239 {
240 (*regs)[0] = env->regs[R_EBX];
241 (*regs)[1] = env->regs[R_ECX];
242 (*regs)[2] = env->regs[R_EDX];
243 (*regs)[3] = env->regs[R_ESI];
244 (*regs)[4] = env->regs[R_EDI];
245 (*regs)[5] = env->regs[R_EBP];
246 (*regs)[6] = env->regs[R_EAX];
247 (*regs)[7] = env->segs[R_DS].selector & 0xffff;
248 (*regs)[8] = env->segs[R_ES].selector & 0xffff;
249 (*regs)[9] = env->segs[R_FS].selector & 0xffff;
250 (*regs)[10] = env->segs[R_GS].selector & 0xffff;
251 (*regs)[11] = env->regs[R_EAX]; /* XXX */
252 (*regs)[12] = env->eip;
253 (*regs)[13] = env->segs[R_CS].selector & 0xffff;
254 (*regs)[14] = env->eflags;
255 (*regs)[15] = env->regs[R_ESP];
256 (*regs)[16] = env->segs[R_SS].selector & 0xffff;
257 }
258 #endif
259
260 #define USE_ELF_CORE_DUMP
261 #define ELF_EXEC_PAGESIZE 4096
262
263 #endif
264
265 #ifdef TARGET_ARM
266
267 #ifndef TARGET_AARCH64
268 /* 32 bit ARM definitions */
269
270 #define ELF_START_MMAP 0x80000000
271
272 #define ELF_ARCH EM_ARM
273 #define ELF_CLASS ELFCLASS32
274
275 static inline void init_thread(struct target_pt_regs *regs,
276 struct image_info *infop)
277 {
278 abi_long stack = infop->start_stack;
279 memset(regs, 0, sizeof(*regs));
280
281 regs->uregs[16] = ARM_CPU_MODE_USR;
282 if (infop->entry & 1) {
283 regs->uregs[16] |= CPSR_T;
284 }
285 regs->uregs[15] = infop->entry & 0xfffffffe;
286 regs->uregs[13] = infop->start_stack;
287 /* FIXME - what to for failure of get_user()? */
288 get_user_ual(regs->uregs[2], stack + 8); /* envp */
289 get_user_ual(regs->uregs[1], stack + 4); /* envp */
290 /* XXX: it seems that r0 is zeroed after ! */
291 regs->uregs[0] = 0;
292 /* For uClinux PIC binaries. */
293 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
294 regs->uregs[10] = infop->start_data;
295
296 /* Support ARM FDPIC. */
297 if (info_is_fdpic(infop)) {
298 /* As described in the ABI document, r7 points to the loadmap info
299 * prepared by the kernel. If an interpreter is needed, r8 points
300 * to the interpreter loadmap and r9 points to the interpreter
301 * PT_DYNAMIC info. If no interpreter is needed, r8 is zero, and
302 * r9 points to the main program PT_DYNAMIC info.
303 */
304 regs->uregs[7] = infop->loadmap_addr;
305 if (infop->interpreter_loadmap_addr) {
306 /* Executable is dynamically loaded. */
307 regs->uregs[8] = infop->interpreter_loadmap_addr;
308 regs->uregs[9] = infop->interpreter_pt_dynamic_addr;
309 } else {
310 regs->uregs[8] = 0;
311 regs->uregs[9] = infop->pt_dynamic_addr;
312 }
313 }
314 }
315
316 #define ELF_NREG 18
317 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
318
319 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env)
320 {
321 (*regs)[0] = tswapreg(env->regs[0]);
322 (*regs)[1] = tswapreg(env->regs[1]);
323 (*regs)[2] = tswapreg(env->regs[2]);
324 (*regs)[3] = tswapreg(env->regs[3]);
325 (*regs)[4] = tswapreg(env->regs[4]);
326 (*regs)[5] = tswapreg(env->regs[5]);
327 (*regs)[6] = tswapreg(env->regs[6]);
328 (*regs)[7] = tswapreg(env->regs[7]);
329 (*regs)[8] = tswapreg(env->regs[8]);
330 (*regs)[9] = tswapreg(env->regs[9]);
331 (*regs)[10] = tswapreg(env->regs[10]);
332 (*regs)[11] = tswapreg(env->regs[11]);
333 (*regs)[12] = tswapreg(env->regs[12]);
334 (*regs)[13] = tswapreg(env->regs[13]);
335 (*regs)[14] = tswapreg(env->regs[14]);
336 (*regs)[15] = tswapreg(env->regs[15]);
337
338 (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env));
339 (*regs)[17] = tswapreg(env->regs[0]); /* XXX */
340 }
341
342 #define USE_ELF_CORE_DUMP
343 #define ELF_EXEC_PAGESIZE 4096
344
345 enum
346 {
347 ARM_HWCAP_ARM_SWP = 1 << 0,
348 ARM_HWCAP_ARM_HALF = 1 << 1,
349 ARM_HWCAP_ARM_THUMB = 1 << 2,
350 ARM_HWCAP_ARM_26BIT = 1 << 3,
351 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
352 ARM_HWCAP_ARM_FPA = 1 << 5,
353 ARM_HWCAP_ARM_VFP = 1 << 6,
354 ARM_HWCAP_ARM_EDSP = 1 << 7,
355 ARM_HWCAP_ARM_JAVA = 1 << 8,
356 ARM_HWCAP_ARM_IWMMXT = 1 << 9,
357 ARM_HWCAP_ARM_CRUNCH = 1 << 10,
358 ARM_HWCAP_ARM_THUMBEE = 1 << 11,
359 ARM_HWCAP_ARM_NEON = 1 << 12,
360 ARM_HWCAP_ARM_VFPv3 = 1 << 13,
361 ARM_HWCAP_ARM_VFPv3D16 = 1 << 14,
362 ARM_HWCAP_ARM_TLS = 1 << 15,
363 ARM_HWCAP_ARM_VFPv4 = 1 << 16,
364 ARM_HWCAP_ARM_IDIVA = 1 << 17,
365 ARM_HWCAP_ARM_IDIVT = 1 << 18,
366 ARM_HWCAP_ARM_VFPD32 = 1 << 19,
367 ARM_HWCAP_ARM_LPAE = 1 << 20,
368 ARM_HWCAP_ARM_EVTSTRM = 1 << 21,
369 };
370
371 enum {
372 ARM_HWCAP2_ARM_AES = 1 << 0,
373 ARM_HWCAP2_ARM_PMULL = 1 << 1,
374 ARM_HWCAP2_ARM_SHA1 = 1 << 2,
375 ARM_HWCAP2_ARM_SHA2 = 1 << 3,
376 ARM_HWCAP2_ARM_CRC32 = 1 << 4,
377 };
378
379 /* The commpage only exists for 32 bit kernels */
380
381 /* Return 1 if the proposed guest space is suitable for the guest.
382 * Return 0 if the proposed guest space isn't suitable, but another
383 * address space should be tried.
384 * Return -1 if there is no way the proposed guest space can be
385 * valid regardless of the base.
386 * The guest code may leave a page mapped and populate it if the
387 * address is suitable.
388 */
389 static int init_guest_commpage(unsigned long guest_base,
390 unsigned long guest_size)
391 {
392 unsigned long real_start, test_page_addr;
393
394 /* We need to check that we can force a fault on access to the
395 * commpage at 0xffff0fxx
396 */
397 test_page_addr = guest_base + (0xffff0f00 & qemu_host_page_mask);
398
399 /* If the commpage lies within the already allocated guest space,
400 * then there is no way we can allocate it.
401 *
402 * You may be thinking that that this check is redundant because
403 * we already validated the guest size against MAX_RESERVED_VA;
404 * but if qemu_host_page_mask is unusually large, then
405 * test_page_addr may be lower.
406 */
407 if (test_page_addr >= guest_base
408 && test_page_addr < (guest_base + guest_size)) {
409 return -1;
410 }
411
412 /* Note it needs to be writeable to let us initialise it */
413 real_start = (unsigned long)
414 mmap((void *)test_page_addr, qemu_host_page_size,
415 PROT_READ | PROT_WRITE,
416 MAP_ANONYMOUS | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
417
418 /* If we can't map it then try another address */
419 if (real_start == -1ul) {
420 return 0;
421 }
422
423 if (real_start != test_page_addr) {
424 /* OS didn't put the page where we asked - unmap and reject */
425 munmap((void *)real_start, qemu_host_page_size);
426 return 0;
427 }
428
429 /* Leave the page mapped
430 * Populate it (mmap should have left it all 0'd)
431 */
432
433 /* Kernel helper versions */
434 __put_user(5, (uint32_t *)g2h(0xffff0ffcul));
435
436 /* Now it's populated make it RO */
437 if (mprotect((void *)test_page_addr, qemu_host_page_size, PROT_READ)) {
438 perror("Protecting guest commpage");
439 exit(-1);
440 }
441
442 return 1; /* All good */
443 }
444
445 #define ELF_HWCAP get_elf_hwcap()
446 #define ELF_HWCAP2 get_elf_hwcap2()
447
448 static uint32_t get_elf_hwcap(void)
449 {
450 ARMCPU *cpu = ARM_CPU(thread_cpu);
451 uint32_t hwcaps = 0;
452
453 hwcaps |= ARM_HWCAP_ARM_SWP;
454 hwcaps |= ARM_HWCAP_ARM_HALF;
455 hwcaps |= ARM_HWCAP_ARM_THUMB;
456 hwcaps |= ARM_HWCAP_ARM_FAST_MULT;
457
458 /* probe for the extra features */
459 #define GET_FEATURE(feat, hwcap) \
460 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
461
462 #define GET_FEATURE_ID(feat, hwcap) \
463 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
464
465 /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */
466 GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP);
467 GET_FEATURE(ARM_FEATURE_VFP, ARM_HWCAP_ARM_VFP);
468 GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
469 GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
470 GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
471 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPv3);
472 GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS);
473 GET_FEATURE(ARM_FEATURE_VFP4, ARM_HWCAP_ARM_VFPv4);
474 GET_FEATURE_ID(arm_div, ARM_HWCAP_ARM_IDIVA);
475 GET_FEATURE_ID(thumb_div, ARM_HWCAP_ARM_IDIVT);
476 /* All QEMU's VFPv3 CPUs have 32 registers, see VFP_DREG in translate.c.
477 * Note that the ARM_HWCAP_ARM_VFPv3D16 bit is always the inverse of
478 * ARM_HWCAP_ARM_VFPD32 (and so always clear for QEMU); it is unrelated
479 * to our VFP_FP16 feature bit.
480 */
481 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPD32);
482 GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE);
483
484 return hwcaps;
485 }
486
487 static uint32_t get_elf_hwcap2(void)
488 {
489 ARMCPU *cpu = ARM_CPU(thread_cpu);
490 uint32_t hwcaps = 0;
491
492 GET_FEATURE_ID(aa32_aes, ARM_HWCAP2_ARM_AES);
493 GET_FEATURE_ID(aa32_pmull, ARM_HWCAP2_ARM_PMULL);
494 GET_FEATURE_ID(aa32_sha1, ARM_HWCAP2_ARM_SHA1);
495 GET_FEATURE_ID(aa32_sha2, ARM_HWCAP2_ARM_SHA2);
496 GET_FEATURE_ID(aa32_crc32, ARM_HWCAP2_ARM_CRC32);
497 return hwcaps;
498 }
499
500 #undef GET_FEATURE
501 #undef GET_FEATURE_ID
502
503 #define ELF_PLATFORM get_elf_platform()
504
505 static const char *get_elf_platform(void)
506 {
507 CPUARMState *env = thread_cpu->env_ptr;
508
509 #ifdef TARGET_WORDS_BIGENDIAN
510 # define END "b"
511 #else
512 # define END "l"
513 #endif
514
515 if (arm_feature(env, ARM_FEATURE_V8)) {
516 return "v8" END;
517 } else if (arm_feature(env, ARM_FEATURE_V7)) {
518 if (arm_feature(env, ARM_FEATURE_M)) {
519 return "v7m" END;
520 } else {
521 return "v7" END;
522 }
523 } else if (arm_feature(env, ARM_FEATURE_V6)) {
524 return "v6" END;
525 } else if (arm_feature(env, ARM_FEATURE_V5)) {
526 return "v5" END;
527 } else {
528 return "v4" END;
529 }
530
531 #undef END
532 }
533
534 #else
535 /* 64 bit ARM definitions */
536 #define ELF_START_MMAP 0x80000000
537
538 #define ELF_ARCH EM_AARCH64
539 #define ELF_CLASS ELFCLASS64
540 #ifdef TARGET_WORDS_BIGENDIAN
541 # define ELF_PLATFORM "aarch64_be"
542 #else
543 # define ELF_PLATFORM "aarch64"
544 #endif
545
546 static inline void init_thread(struct target_pt_regs *regs,
547 struct image_info *infop)
548 {
549 abi_long stack = infop->start_stack;
550 memset(regs, 0, sizeof(*regs));
551
552 regs->pc = infop->entry & ~0x3ULL;
553 regs->sp = stack;
554 }
555
556 #define ELF_NREG 34
557 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
558
559 static void elf_core_copy_regs(target_elf_gregset_t *regs,
560 const CPUARMState *env)
561 {
562 int i;
563
564 for (i = 0; i < 32; i++) {
565 (*regs)[i] = tswapreg(env->xregs[i]);
566 }
567 (*regs)[32] = tswapreg(env->pc);
568 (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env));
569 }
570
571 #define USE_ELF_CORE_DUMP
572 #define ELF_EXEC_PAGESIZE 4096
573
574 enum {
575 ARM_HWCAP_A64_FP = 1 << 0,
576 ARM_HWCAP_A64_ASIMD = 1 << 1,
577 ARM_HWCAP_A64_EVTSTRM = 1 << 2,
578 ARM_HWCAP_A64_AES = 1 << 3,
579 ARM_HWCAP_A64_PMULL = 1 << 4,
580 ARM_HWCAP_A64_SHA1 = 1 << 5,
581 ARM_HWCAP_A64_SHA2 = 1 << 6,
582 ARM_HWCAP_A64_CRC32 = 1 << 7,
583 ARM_HWCAP_A64_ATOMICS = 1 << 8,
584 ARM_HWCAP_A64_FPHP = 1 << 9,
585 ARM_HWCAP_A64_ASIMDHP = 1 << 10,
586 ARM_HWCAP_A64_CPUID = 1 << 11,
587 ARM_HWCAP_A64_ASIMDRDM = 1 << 12,
588 ARM_HWCAP_A64_JSCVT = 1 << 13,
589 ARM_HWCAP_A64_FCMA = 1 << 14,
590 ARM_HWCAP_A64_LRCPC = 1 << 15,
591 ARM_HWCAP_A64_DCPOP = 1 << 16,
592 ARM_HWCAP_A64_SHA3 = 1 << 17,
593 ARM_HWCAP_A64_SM3 = 1 << 18,
594 ARM_HWCAP_A64_SM4 = 1 << 19,
595 ARM_HWCAP_A64_ASIMDDP = 1 << 20,
596 ARM_HWCAP_A64_SHA512 = 1 << 21,
597 ARM_HWCAP_A64_SVE = 1 << 22,
598 ARM_HWCAP_A64_ASIMDFHM = 1 << 23,
599 ARM_HWCAP_A64_DIT = 1 << 24,
600 ARM_HWCAP_A64_USCAT = 1 << 25,
601 ARM_HWCAP_A64_ILRCPC = 1 << 26,
602 ARM_HWCAP_A64_FLAGM = 1 << 27,
603 ARM_HWCAP_A64_SSBS = 1 << 28,
604 ARM_HWCAP_A64_SB = 1 << 29,
605 ARM_HWCAP_A64_PACA = 1 << 30,
606 ARM_HWCAP_A64_PACG = 1UL << 31,
607 };
608
609 #define ELF_HWCAP get_elf_hwcap()
610
611 static uint32_t get_elf_hwcap(void)
612 {
613 ARMCPU *cpu = ARM_CPU(thread_cpu);
614 uint32_t hwcaps = 0;
615
616 hwcaps |= ARM_HWCAP_A64_FP;
617 hwcaps |= ARM_HWCAP_A64_ASIMD;
618 hwcaps |= ARM_HWCAP_A64_CPUID;
619
620 /* probe for the extra features */
621 #define GET_FEATURE_ID(feat, hwcap) \
622 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
623
624 GET_FEATURE_ID(aa64_aes, ARM_HWCAP_A64_AES);
625 GET_FEATURE_ID(aa64_pmull, ARM_HWCAP_A64_PMULL);
626 GET_FEATURE_ID(aa64_sha1, ARM_HWCAP_A64_SHA1);
627 GET_FEATURE_ID(aa64_sha256, ARM_HWCAP_A64_SHA2);
628 GET_FEATURE_ID(aa64_sha512, ARM_HWCAP_A64_SHA512);
629 GET_FEATURE_ID(aa64_crc32, ARM_HWCAP_A64_CRC32);
630 GET_FEATURE_ID(aa64_sha3, ARM_HWCAP_A64_SHA3);
631 GET_FEATURE_ID(aa64_sm3, ARM_HWCAP_A64_SM3);
632 GET_FEATURE_ID(aa64_sm4, ARM_HWCAP_A64_SM4);
633 GET_FEATURE_ID(aa64_fp16, ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP);
634 GET_FEATURE_ID(aa64_atomics, ARM_HWCAP_A64_ATOMICS);
635 GET_FEATURE_ID(aa64_rdm, ARM_HWCAP_A64_ASIMDRDM);
636 GET_FEATURE_ID(aa64_dp, ARM_HWCAP_A64_ASIMDDP);
637 GET_FEATURE_ID(aa64_fcma, ARM_HWCAP_A64_FCMA);
638 GET_FEATURE_ID(aa64_sve, ARM_HWCAP_A64_SVE);
639 GET_FEATURE_ID(aa64_pauth, ARM_HWCAP_A64_PACA | ARM_HWCAP_A64_PACG);
640 GET_FEATURE_ID(aa64_fhm, ARM_HWCAP_A64_ASIMDFHM);
641 GET_FEATURE_ID(aa64_jscvt, ARM_HWCAP_A64_JSCVT);
642 GET_FEATURE_ID(aa64_sb, ARM_HWCAP_A64_SB);
643 GET_FEATURE_ID(aa64_condm_4, ARM_HWCAP_A64_FLAGM);
644
645 #undef GET_FEATURE_ID
646
647 return hwcaps;
648 }
649
650 #endif /* not TARGET_AARCH64 */
651 #endif /* TARGET_ARM */
652
653 #ifdef TARGET_SPARC
654 #ifdef TARGET_SPARC64
655
656 #define ELF_START_MMAP 0x80000000
657 #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
658 | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
659 #ifndef TARGET_ABI32
660 #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
661 #else
662 #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
663 #endif
664
665 #define ELF_CLASS ELFCLASS64
666 #define ELF_ARCH EM_SPARCV9
667
668 #define STACK_BIAS 2047
669
670 static inline void init_thread(struct target_pt_regs *regs,
671 struct image_info *infop)
672 {
673 #ifndef TARGET_ABI32
674 regs->tstate = 0;
675 #endif
676 regs->pc = infop->entry;
677 regs->npc = regs->pc + 4;
678 regs->y = 0;
679 #ifdef TARGET_ABI32
680 regs->u_regs[14] = infop->start_stack - 16 * 4;
681 #else
682 if (personality(infop->personality) == PER_LINUX32)
683 regs->u_regs[14] = infop->start_stack - 16 * 4;
684 else
685 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
686 #endif
687 }
688
689 #else
690 #define ELF_START_MMAP 0x80000000
691 #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
692 | HWCAP_SPARC_MULDIV)
693
694 #define ELF_CLASS ELFCLASS32
695 #define ELF_ARCH EM_SPARC
696
697 static inline void init_thread(struct target_pt_regs *regs,
698 struct image_info *infop)
699 {
700 regs->psr = 0;
701 regs->pc = infop->entry;
702 regs->npc = regs->pc + 4;
703 regs->y = 0;
704 regs->u_regs[14] = infop->start_stack - 16 * 4;
705 }
706
707 #endif
708 #endif
709
710 #ifdef TARGET_PPC
711
712 #define ELF_MACHINE PPC_ELF_MACHINE
713 #define ELF_START_MMAP 0x80000000
714
715 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
716
717 #define elf_check_arch(x) ( (x) == EM_PPC64 )
718
719 #define ELF_CLASS ELFCLASS64
720
721 #else
722
723 #define ELF_CLASS ELFCLASS32
724
725 #endif
726
727 #define ELF_ARCH EM_PPC
728
729 /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
730 See arch/powerpc/include/asm/cputable.h. */
731 enum {
732 QEMU_PPC_FEATURE_32 = 0x80000000,
733 QEMU_PPC_FEATURE_64 = 0x40000000,
734 QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
735 QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
736 QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
737 QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
738 QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
739 QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
740 QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
741 QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
742 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
743 QEMU_PPC_FEATURE_NO_TB = 0x00100000,
744 QEMU_PPC_FEATURE_POWER4 = 0x00080000,
745 QEMU_PPC_FEATURE_POWER5 = 0x00040000,
746 QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
747 QEMU_PPC_FEATURE_CELL = 0x00010000,
748 QEMU_PPC_FEATURE_BOOKE = 0x00008000,
749 QEMU_PPC_FEATURE_SMT = 0x00004000,
750 QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
751 QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
752 QEMU_PPC_FEATURE_PA6T = 0x00000800,
753 QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
754 QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
755 QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
756 QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
757 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
758
759 QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
760 QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
761
762 /* Feature definitions in AT_HWCAP2. */
763 QEMU_PPC_FEATURE2_ARCH_2_07 = 0x80000000, /* ISA 2.07 */
764 QEMU_PPC_FEATURE2_HAS_HTM = 0x40000000, /* Hardware Transactional Memory */
765 QEMU_PPC_FEATURE2_HAS_DSCR = 0x20000000, /* Data Stream Control Register */
766 QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */
767 QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */
768 QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */
769 QEMU_PPC_FEATURE2_ARCH_3_00 = 0x00800000, /* ISA 3.00 */
770 };
771
772 #define ELF_HWCAP get_elf_hwcap()
773
774 static uint32_t get_elf_hwcap(void)
775 {
776 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
777 uint32_t features = 0;
778
779 /* We don't have to be terribly complete here; the high points are
780 Altivec/FP/SPE support. Anything else is just a bonus. */
781 #define GET_FEATURE(flag, feature) \
782 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
783 #define GET_FEATURE2(flags, feature) \
784 do { \
785 if ((cpu->env.insns_flags2 & flags) == flags) { \
786 features |= feature; \
787 } \
788 } while (0)
789 GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
790 GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
791 GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
792 GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
793 GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
794 GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
795 GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
796 GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
797 GET_FEATURE2(PPC2_DFP, QEMU_PPC_FEATURE_HAS_DFP);
798 GET_FEATURE2(PPC2_VSX, QEMU_PPC_FEATURE_HAS_VSX);
799 GET_FEATURE2((PPC2_PERM_ISA206 | PPC2_DIVE_ISA206 | PPC2_ATOMIC_ISA206 |
800 PPC2_FP_CVT_ISA206 | PPC2_FP_TST_ISA206),
801 QEMU_PPC_FEATURE_ARCH_2_06);
802 #undef GET_FEATURE
803 #undef GET_FEATURE2
804
805 return features;
806 }
807
808 #define ELF_HWCAP2 get_elf_hwcap2()
809
810 static uint32_t get_elf_hwcap2(void)
811 {
812 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
813 uint32_t features = 0;
814
815 #define GET_FEATURE(flag, feature) \
816 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
817 #define GET_FEATURE2(flag, feature) \
818 do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
819
820 GET_FEATURE(PPC_ISEL, QEMU_PPC_FEATURE2_HAS_ISEL);
821 GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR);
822 GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 |
823 PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07);
824 GET_FEATURE2(PPC2_ISA300, QEMU_PPC_FEATURE2_ARCH_3_00);
825
826 #undef GET_FEATURE
827 #undef GET_FEATURE2
828
829 return features;
830 }
831
832 /*
833 * The requirements here are:
834 * - keep the final alignment of sp (sp & 0xf)
835 * - make sure the 32-bit value at the first 16 byte aligned position of
836 * AUXV is greater than 16 for glibc compatibility.
837 * AT_IGNOREPPC is used for that.
838 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
839 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
840 */
841 #define DLINFO_ARCH_ITEMS 5
842 #define ARCH_DLINFO \
843 do { \
844 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \
845 /* \
846 * Handle glibc compatibility: these magic entries must \
847 * be at the lowest addresses in the final auxv. \
848 */ \
849 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
850 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
851 NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \
852 NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \
853 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
854 } while (0)
855
856 static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
857 {
858 _regs->gpr[1] = infop->start_stack;
859 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
860 if (get_ppc64_abi(infop) < 2) {
861 uint64_t val;
862 get_user_u64(val, infop->entry + 8);
863 _regs->gpr[2] = val + infop->load_bias;
864 get_user_u64(val, infop->entry);
865 infop->entry = val + infop->load_bias;
866 } else {
867 _regs->gpr[12] = infop->entry; /* r12 set to global entry address */
868 }
869 #endif
870 _regs->nip = infop->entry;
871 }
872
873 /* See linux kernel: arch/powerpc/include/asm/elf.h. */
874 #define ELF_NREG 48
875 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
876
877 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env)
878 {
879 int i;
880 target_ulong ccr = 0;
881
882 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
883 (*regs)[i] = tswapreg(env->gpr[i]);
884 }
885
886 (*regs)[32] = tswapreg(env->nip);
887 (*regs)[33] = tswapreg(env->msr);
888 (*regs)[35] = tswapreg(env->ctr);
889 (*regs)[36] = tswapreg(env->lr);
890 (*regs)[37] = tswapreg(env->xer);
891
892 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
893 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
894 }
895 (*regs)[38] = tswapreg(ccr);
896 }
897
898 #define USE_ELF_CORE_DUMP
899 #define ELF_EXEC_PAGESIZE 4096
900
901 #endif
902
903 #ifdef TARGET_MIPS
904
905 #define ELF_START_MMAP 0x80000000
906
907 #ifdef TARGET_MIPS64
908 #define ELF_CLASS ELFCLASS64
909 #else
910 #define ELF_CLASS ELFCLASS32
911 #endif
912 #define ELF_ARCH EM_MIPS
913
914 #define elf_check_arch(x) ((x) == EM_MIPS || (x) == EM_NANOMIPS)
915
916 static inline void init_thread(struct target_pt_regs *regs,
917 struct image_info *infop)
918 {
919 regs->cp0_status = 2 << CP0St_KSU;
920 regs->cp0_epc = infop->entry;
921 regs->regs[29] = infop->start_stack;
922 }
923
924 /* See linux kernel: arch/mips/include/asm/elf.h. */
925 #define ELF_NREG 45
926 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
927
928 /* See linux kernel: arch/mips/include/asm/reg.h. */
929 enum {
930 #ifdef TARGET_MIPS64
931 TARGET_EF_R0 = 0,
932 #else
933 TARGET_EF_R0 = 6,
934 #endif
935 TARGET_EF_R26 = TARGET_EF_R0 + 26,
936 TARGET_EF_R27 = TARGET_EF_R0 + 27,
937 TARGET_EF_LO = TARGET_EF_R0 + 32,
938 TARGET_EF_HI = TARGET_EF_R0 + 33,
939 TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
940 TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
941 TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
942 TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
943 };
944
945 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
946 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env)
947 {
948 int i;
949
950 for (i = 0; i < TARGET_EF_R0; i++) {
951 (*regs)[i] = 0;
952 }
953 (*regs)[TARGET_EF_R0] = 0;
954
955 for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
956 (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]);
957 }
958
959 (*regs)[TARGET_EF_R26] = 0;
960 (*regs)[TARGET_EF_R27] = 0;
961 (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]);
962 (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]);
963 (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC);
964 (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr);
965 (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status);
966 (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause);
967 }
968
969 #define USE_ELF_CORE_DUMP
970 #define ELF_EXEC_PAGESIZE 4096
971
972 /* See arch/mips/include/uapi/asm/hwcap.h. */
973 enum {
974 HWCAP_MIPS_R6 = (1 << 0),
975 HWCAP_MIPS_MSA = (1 << 1),
976 };
977
978 #define ELF_HWCAP get_elf_hwcap()
979
980 static uint32_t get_elf_hwcap(void)
981 {
982 MIPSCPU *cpu = MIPS_CPU(thread_cpu);
983 uint32_t hwcaps = 0;
984
985 #define GET_FEATURE(flag, hwcap) \
986 do { if (cpu->env.insn_flags & (flag)) { hwcaps |= hwcap; } } while (0)
987
988 GET_FEATURE(ISA_MIPS32R6 | ISA_MIPS64R6, HWCAP_MIPS_R6);
989 GET_FEATURE(ASE_MSA, HWCAP_MIPS_MSA);
990
991 #undef GET_FEATURE
992
993 return hwcaps;
994 }
995
996 #endif /* TARGET_MIPS */
997
998 #ifdef TARGET_MICROBLAZE
999
1000 #define ELF_START_MMAP 0x80000000
1001
1002 #define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
1003
1004 #define ELF_CLASS ELFCLASS32
1005 #define ELF_ARCH EM_MICROBLAZE
1006
1007 static inline void init_thread(struct target_pt_regs *regs,
1008 struct image_info *infop)
1009 {
1010 regs->pc = infop->entry;
1011 regs->r1 = infop->start_stack;
1012
1013 }
1014
1015 #define ELF_EXEC_PAGESIZE 4096
1016
1017 #define USE_ELF_CORE_DUMP
1018 #define ELF_NREG 38
1019 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1020
1021 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
1022 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env)
1023 {
1024 int i, pos = 0;
1025
1026 for (i = 0; i < 32; i++) {
1027 (*regs)[pos++] = tswapreg(env->regs[i]);
1028 }
1029
1030 for (i = 0; i < 6; i++) {
1031 (*regs)[pos++] = tswapreg(env->sregs[i]);
1032 }
1033 }
1034
1035 #endif /* TARGET_MICROBLAZE */
1036
1037 #ifdef TARGET_NIOS2
1038
1039 #define ELF_START_MMAP 0x80000000
1040
1041 #define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
1042
1043 #define ELF_CLASS ELFCLASS32
1044 #define ELF_ARCH EM_ALTERA_NIOS2
1045
1046 static void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1047 {
1048 regs->ea = infop->entry;
1049 regs->sp = infop->start_stack;
1050 regs->estatus = 0x3;
1051 }
1052
1053 #define ELF_EXEC_PAGESIZE 4096
1054
1055 #define USE_ELF_CORE_DUMP
1056 #define ELF_NREG 49
1057 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1058
1059 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
1060 static void elf_core_copy_regs(target_elf_gregset_t *regs,
1061 const CPUNios2State *env)
1062 {
1063 int i;
1064
1065 (*regs)[0] = -1;
1066 for (i = 1; i < 8; i++) /* r0-r7 */
1067 (*regs)[i] = tswapreg(env->regs[i + 7]);
1068
1069 for (i = 8; i < 16; i++) /* r8-r15 */
1070 (*regs)[i] = tswapreg(env->regs[i - 8]);
1071
1072 for (i = 16; i < 24; i++) /* r16-r23 */
1073 (*regs)[i] = tswapreg(env->regs[i + 7]);
1074 (*regs)[24] = -1; /* R_ET */
1075 (*regs)[25] = -1; /* R_BT */
1076 (*regs)[26] = tswapreg(env->regs[R_GP]);
1077 (*regs)[27] = tswapreg(env->regs[R_SP]);
1078 (*regs)[28] = tswapreg(env->regs[R_FP]);
1079 (*regs)[29] = tswapreg(env->regs[R_EA]);
1080 (*regs)[30] = -1; /* R_SSTATUS */
1081 (*regs)[31] = tswapreg(env->regs[R_RA]);
1082
1083 (*regs)[32] = tswapreg(env->regs[R_PC]);
1084
1085 (*regs)[33] = -1; /* R_STATUS */
1086 (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]);
1087
1088 for (i = 35; i < 49; i++) /* ... */
1089 (*regs)[i] = -1;
1090 }
1091
1092 #endif /* TARGET_NIOS2 */
1093
1094 #ifdef TARGET_OPENRISC
1095
1096 #define ELF_START_MMAP 0x08000000
1097
1098 #define ELF_ARCH EM_OPENRISC
1099 #define ELF_CLASS ELFCLASS32
1100 #define ELF_DATA ELFDATA2MSB
1101
1102 static inline void init_thread(struct target_pt_regs *regs,
1103 struct image_info *infop)
1104 {
1105 regs->pc = infop->entry;
1106 regs->gpr[1] = infop->start_stack;
1107 }
1108
1109 #define USE_ELF_CORE_DUMP
1110 #define ELF_EXEC_PAGESIZE 8192
1111
1112 /* See linux kernel arch/openrisc/include/asm/elf.h. */
1113 #define ELF_NREG 34 /* gprs and pc, sr */
1114 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1115
1116 static void elf_core_copy_regs(target_elf_gregset_t *regs,
1117 const CPUOpenRISCState *env)
1118 {
1119 int i;
1120
1121 for (i = 0; i < 32; i++) {
1122 (*regs)[i] = tswapreg(cpu_get_gpr(env, i));
1123 }
1124 (*regs)[32] = tswapreg(env->pc);
1125 (*regs)[33] = tswapreg(cpu_get_sr(env));
1126 }
1127 #define ELF_HWCAP 0
1128 #define ELF_PLATFORM NULL
1129
1130 #endif /* TARGET_OPENRISC */
1131
1132 #ifdef TARGET_SH4
1133
1134 #define ELF_START_MMAP 0x80000000
1135
1136 #define ELF_CLASS ELFCLASS32
1137 #define ELF_ARCH EM_SH
1138
1139 static inline void init_thread(struct target_pt_regs *regs,
1140 struct image_info *infop)
1141 {
1142 /* Check other registers XXXXX */
1143 regs->pc = infop->entry;
1144 regs->regs[15] = infop->start_stack;
1145 }
1146
1147 /* See linux kernel: arch/sh/include/asm/elf.h. */
1148 #define ELF_NREG 23
1149 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1150
1151 /* See linux kernel: arch/sh/include/asm/ptrace.h. */
1152 enum {
1153 TARGET_REG_PC = 16,
1154 TARGET_REG_PR = 17,
1155 TARGET_REG_SR = 18,
1156 TARGET_REG_GBR = 19,
1157 TARGET_REG_MACH = 20,
1158 TARGET_REG_MACL = 21,
1159 TARGET_REG_SYSCALL = 22
1160 };
1161
1162 static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
1163 const CPUSH4State *env)
1164 {
1165 int i;
1166
1167 for (i = 0; i < 16; i++) {
1168 (*regs)[i] = tswapreg(env->gregs[i]);
1169 }
1170
1171 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1172 (*regs)[TARGET_REG_PR] = tswapreg(env->pr);
1173 (*regs)[TARGET_REG_SR] = tswapreg(env->sr);
1174 (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr);
1175 (*regs)[TARGET_REG_MACH] = tswapreg(env->mach);
1176 (*regs)[TARGET_REG_MACL] = tswapreg(env->macl);
1177 (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
1178 }
1179
1180 #define USE_ELF_CORE_DUMP
1181 #define ELF_EXEC_PAGESIZE 4096
1182
1183 enum {
1184 SH_CPU_HAS_FPU = 0x0001, /* Hardware FPU support */
1185 SH_CPU_HAS_P2_FLUSH_BUG = 0x0002, /* Need to flush the cache in P2 area */
1186 SH_CPU_HAS_MMU_PAGE_ASSOC = 0x0004, /* SH3: TLB way selection bit support */
1187 SH_CPU_HAS_DSP = 0x0008, /* SH-DSP: DSP support */
1188 SH_CPU_HAS_PERF_COUNTER = 0x0010, /* Hardware performance counters */
1189 SH_CPU_HAS_PTEA = 0x0020, /* PTEA register */
1190 SH_CPU_HAS_LLSC = 0x0040, /* movli.l/movco.l */
1191 SH_CPU_HAS_L2_CACHE = 0x0080, /* Secondary cache / URAM */
1192 SH_CPU_HAS_OP32 = 0x0100, /* 32-bit instruction support */
1193 SH_CPU_HAS_PTEAEX = 0x0200, /* PTE ASID Extension support */
1194 };
1195
1196 #define ELF_HWCAP get_elf_hwcap()
1197
1198 static uint32_t get_elf_hwcap(void)
1199 {
1200 SuperHCPU *cpu = SUPERH_CPU(thread_cpu);
1201 uint32_t hwcap = 0;
1202
1203 hwcap |= SH_CPU_HAS_FPU;
1204
1205 if (cpu->env.features & SH_FEATURE_SH4A) {
1206 hwcap |= SH_CPU_HAS_LLSC;
1207 }
1208
1209 return hwcap;
1210 }
1211
1212 #endif
1213
1214 #ifdef TARGET_CRIS
1215
1216 #define ELF_START_MMAP 0x80000000
1217
1218 #define ELF_CLASS ELFCLASS32
1219 #define ELF_ARCH EM_CRIS
1220
1221 static inline void init_thread(struct target_pt_regs *regs,
1222 struct image_info *infop)
1223 {
1224 regs->erp = infop->entry;
1225 }
1226
1227 #define ELF_EXEC_PAGESIZE 8192
1228
1229 #endif
1230
1231 #ifdef TARGET_M68K
1232
1233 #define ELF_START_MMAP 0x80000000
1234
1235 #define ELF_CLASS ELFCLASS32
1236 #define ELF_ARCH EM_68K
1237
1238 /* ??? Does this need to do anything?
1239 #define ELF_PLAT_INIT(_r) */
1240
1241 static inline void init_thread(struct target_pt_regs *regs,
1242 struct image_info *infop)
1243 {
1244 regs->usp = infop->start_stack;
1245 regs->sr = 0;
1246 regs->pc = infop->entry;
1247 }
1248
1249 /* See linux kernel: arch/m68k/include/asm/elf.h. */
1250 #define ELF_NREG 20
1251 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1252
1253 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env)
1254 {
1255 (*regs)[0] = tswapreg(env->dregs[1]);
1256 (*regs)[1] = tswapreg(env->dregs[2]);
1257 (*regs)[2] = tswapreg(env->dregs[3]);
1258 (*regs)[3] = tswapreg(env->dregs[4]);
1259 (*regs)[4] = tswapreg(env->dregs[5]);
1260 (*regs)[5] = tswapreg(env->dregs[6]);
1261 (*regs)[6] = tswapreg(env->dregs[7]);
1262 (*regs)[7] = tswapreg(env->aregs[0]);
1263 (*regs)[8] = tswapreg(env->aregs[1]);
1264 (*regs)[9] = tswapreg(env->aregs[2]);
1265 (*regs)[10] = tswapreg(env->aregs[3]);
1266 (*regs)[11] = tswapreg(env->aregs[4]);
1267 (*regs)[12] = tswapreg(env->aregs[5]);
1268 (*regs)[13] = tswapreg(env->aregs[6]);
1269 (*regs)[14] = tswapreg(env->dregs[0]);
1270 (*regs)[15] = tswapreg(env->aregs[7]);
1271 (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */
1272 (*regs)[17] = tswapreg(env->sr);
1273 (*regs)[18] = tswapreg(env->pc);
1274 (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
1275 }
1276
1277 #define USE_ELF_CORE_DUMP
1278 #define ELF_EXEC_PAGESIZE 8192
1279
1280 #endif
1281
1282 #ifdef TARGET_ALPHA
1283
1284 #define ELF_START_MMAP (0x30000000000ULL)
1285
1286 #define ELF_CLASS ELFCLASS64
1287 #define ELF_ARCH EM_ALPHA
1288
1289 static inline void init_thread(struct target_pt_regs *regs,
1290 struct image_info *infop)
1291 {
1292 regs->pc = infop->entry;
1293 regs->ps = 8;
1294 regs->usp = infop->start_stack;
1295 }
1296
1297 #define ELF_EXEC_PAGESIZE 8192
1298
1299 #endif /* TARGET_ALPHA */
1300
1301 #ifdef TARGET_S390X
1302
1303 #define ELF_START_MMAP (0x20000000000ULL)
1304
1305 #define ELF_CLASS ELFCLASS64
1306 #define ELF_DATA ELFDATA2MSB
1307 #define ELF_ARCH EM_S390
1308
1309 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1310 {
1311 regs->psw.addr = infop->entry;
1312 regs->psw.mask = PSW_MASK_64 | PSW_MASK_32;
1313 regs->gprs[15] = infop->start_stack;
1314 }
1315
1316 #endif /* TARGET_S390X */
1317
1318 #ifdef TARGET_TILEGX
1319
1320 /* 42 bits real used address, a half for user mode */
1321 #define ELF_START_MMAP (0x00000020000000000ULL)
1322
1323 #define elf_check_arch(x) ((x) == EM_TILEGX)
1324
1325 #define ELF_CLASS ELFCLASS64
1326 #define ELF_DATA ELFDATA2LSB
1327 #define ELF_ARCH EM_TILEGX
1328
1329 static inline void init_thread(struct target_pt_regs *regs,
1330 struct image_info *infop)
1331 {
1332 regs->pc = infop->entry;
1333 regs->sp = infop->start_stack;
1334
1335 }
1336
1337 #define ELF_EXEC_PAGESIZE 65536 /* TILE-Gx page size is 64KB */
1338
1339 #endif /* TARGET_TILEGX */
1340
1341 #ifdef TARGET_RISCV
1342
1343 #define ELF_START_MMAP 0x80000000
1344 #define ELF_ARCH EM_RISCV
1345
1346 #ifdef TARGET_RISCV32
1347 #define ELF_CLASS ELFCLASS32
1348 #else
1349 #define ELF_CLASS ELFCLASS64
1350 #endif
1351
1352 static inline void init_thread(struct target_pt_regs *regs,
1353 struct image_info *infop)
1354 {
1355 regs->sepc = infop->entry;
1356 regs->sp = infop->start_stack;
1357 }
1358
1359 #define ELF_EXEC_PAGESIZE 4096
1360
1361 #endif /* TARGET_RISCV */
1362
1363 #ifdef TARGET_HPPA
1364
1365 #define ELF_START_MMAP 0x80000000
1366 #define ELF_CLASS ELFCLASS32
1367 #define ELF_ARCH EM_PARISC
1368 #define ELF_PLATFORM "PARISC"
1369 #define STACK_GROWS_DOWN 0
1370 #define STACK_ALIGNMENT 64
1371
1372 static inline void init_thread(struct target_pt_regs *regs,
1373 struct image_info *infop)
1374 {
1375 regs->iaoq[0] = infop->entry;
1376 regs->iaoq[1] = infop->entry + 4;
1377 regs->gr[23] = 0;
1378 regs->gr[24] = infop->arg_start;
1379 regs->gr[25] = (infop->arg_end - infop->arg_start) / sizeof(abi_ulong);
1380 /* The top-of-stack contains a linkage buffer. */
1381 regs->gr[30] = infop->start_stack + 64;
1382 regs->gr[31] = infop->entry;
1383 }
1384
1385 #endif /* TARGET_HPPA */
1386
1387 #ifdef TARGET_XTENSA
1388
1389 #define ELF_START_MMAP 0x20000000
1390
1391 #define ELF_CLASS ELFCLASS32
1392 #define ELF_ARCH EM_XTENSA
1393
1394 static inline void init_thread(struct target_pt_regs *regs,
1395 struct image_info *infop)
1396 {
1397 regs->windowbase = 0;
1398 regs->windowstart = 1;
1399 regs->areg[1] = infop->start_stack;
1400 regs->pc = infop->entry;
1401 }
1402
1403 /* See linux kernel: arch/xtensa/include/asm/elf.h. */
1404 #define ELF_NREG 128
1405 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1406
1407 enum {
1408 TARGET_REG_PC,
1409 TARGET_REG_PS,
1410 TARGET_REG_LBEG,
1411 TARGET_REG_LEND,
1412 TARGET_REG_LCOUNT,
1413 TARGET_REG_SAR,
1414 TARGET_REG_WINDOWSTART,
1415 TARGET_REG_WINDOWBASE,
1416 TARGET_REG_THREADPTR,
1417 TARGET_REG_AR0 = 64,
1418 };
1419
1420 static void elf_core_copy_regs(target_elf_gregset_t *regs,
1421 const CPUXtensaState *env)
1422 {
1423 unsigned i;
1424
1425 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1426 (*regs)[TARGET_REG_PS] = tswapreg(env->sregs[PS] & ~PS_EXCM);
1427 (*regs)[TARGET_REG_LBEG] = tswapreg(env->sregs[LBEG]);
1428 (*regs)[TARGET_REG_LEND] = tswapreg(env->sregs[LEND]);
1429 (*regs)[TARGET_REG_LCOUNT] = tswapreg(env->sregs[LCOUNT]);
1430 (*regs)[TARGET_REG_SAR] = tswapreg(env->sregs[SAR]);
1431 (*regs)[TARGET_REG_WINDOWSTART] = tswapreg(env->sregs[WINDOW_START]);
1432 (*regs)[TARGET_REG_WINDOWBASE] = tswapreg(env->sregs[WINDOW_BASE]);
1433 (*regs)[TARGET_REG_THREADPTR] = tswapreg(env->uregs[THREADPTR]);
1434 xtensa_sync_phys_from_window((CPUXtensaState *)env);
1435 for (i = 0; i < env->config->nareg; ++i) {
1436 (*regs)[TARGET_REG_AR0 + i] = tswapreg(env->phys_regs[i]);
1437 }
1438 }
1439
1440 #define USE_ELF_CORE_DUMP
1441 #define ELF_EXEC_PAGESIZE 4096
1442
1443 #endif /* TARGET_XTENSA */
1444
1445 #ifndef ELF_PLATFORM
1446 #define ELF_PLATFORM (NULL)
1447 #endif
1448
1449 #ifndef ELF_MACHINE
1450 #define ELF_MACHINE ELF_ARCH
1451 #endif
1452
1453 #ifndef elf_check_arch
1454 #define elf_check_arch(x) ((x) == ELF_ARCH)
1455 #endif
1456
1457 #ifndef ELF_HWCAP
1458 #define ELF_HWCAP 0
1459 #endif
1460
1461 #ifndef STACK_GROWS_DOWN
1462 #define STACK_GROWS_DOWN 1
1463 #endif
1464
1465 #ifndef STACK_ALIGNMENT
1466 #define STACK_ALIGNMENT 16
1467 #endif
1468
1469 #ifdef TARGET_ABI32
1470 #undef ELF_CLASS
1471 #define ELF_CLASS ELFCLASS32
1472 #undef bswaptls
1473 #define bswaptls(ptr) bswap32s(ptr)
1474 #endif
1475
1476 #include "elf.h"
1477
1478 struct exec
1479 {
1480 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
1481 unsigned int a_text; /* length of text, in bytes */
1482 unsigned int a_data; /* length of data, in bytes */
1483 unsigned int a_bss; /* length of uninitialized data area, in bytes */
1484 unsigned int a_syms; /* length of symbol table data in file, in bytes */
1485 unsigned int a_entry; /* start address */
1486 unsigned int a_trsize; /* length of relocation info for text, in bytes */
1487 unsigned int a_drsize; /* length of relocation info for data, in bytes */
1488 };
1489
1490
1491 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
1492 #define OMAGIC 0407
1493 #define NMAGIC 0410
1494 #define ZMAGIC 0413
1495 #define QMAGIC 0314
1496
1497 /* Necessary parameters */
1498 #define TARGET_ELF_EXEC_PAGESIZE \
1499 (((eppnt->p_align & ~qemu_host_page_mask) != 0) ? \
1500 TARGET_PAGE_SIZE : MAX(qemu_host_page_size, TARGET_PAGE_SIZE))
1501 #define TARGET_ELF_PAGELENGTH(_v) ROUND_UP((_v), TARGET_ELF_EXEC_PAGESIZE)
1502 #define TARGET_ELF_PAGESTART(_v) ((_v) & \
1503 ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1))
1504 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
1505
1506 #define DLINFO_ITEMS 15
1507
1508 static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
1509 {
1510 memcpy(to, from, n);
1511 }
1512
1513 #ifdef BSWAP_NEEDED
1514 static void bswap_ehdr(struct elfhdr *ehdr)
1515 {
1516 bswap16s(&ehdr->e_type); /* Object file type */
1517 bswap16s(&ehdr->e_machine); /* Architecture */
1518 bswap32s(&ehdr->e_version); /* Object file version */
1519 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
1520 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
1521 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
1522 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
1523 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
1524 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
1525 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
1526 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
1527 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
1528 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
1529 }
1530
1531 static void bswap_phdr(struct elf_phdr *phdr, int phnum)
1532 {
1533 int i;
1534 for (i = 0; i < phnum; ++i, ++phdr) {
1535 bswap32s(&phdr->p_type); /* Segment type */
1536 bswap32s(&phdr->p_flags); /* Segment flags */
1537 bswaptls(&phdr->p_offset); /* Segment file offset */
1538 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
1539 bswaptls(&phdr->p_paddr); /* Segment physical address */
1540 bswaptls(&phdr->p_filesz); /* Segment size in file */
1541 bswaptls(&phdr->p_memsz); /* Segment size in memory */
1542 bswaptls(&phdr->p_align); /* Segment alignment */
1543 }
1544 }
1545
1546 static void bswap_shdr(struct elf_shdr *shdr, int shnum)
1547 {
1548 int i;
1549 for (i = 0; i < shnum; ++i, ++shdr) {
1550 bswap32s(&shdr->sh_name);
1551 bswap32s(&shdr->sh_type);
1552 bswaptls(&shdr->sh_flags);
1553 bswaptls(&shdr->sh_addr);
1554 bswaptls(&shdr->sh_offset);
1555 bswaptls(&shdr->sh_size);
1556 bswap32s(&shdr->sh_link);
1557 bswap32s(&shdr->sh_info);
1558 bswaptls(&shdr->sh_addralign);
1559 bswaptls(&shdr->sh_entsize);
1560 }
1561 }
1562
1563 static void bswap_sym(struct elf_sym *sym)
1564 {
1565 bswap32s(&sym->st_name);
1566 bswaptls(&sym->st_value);
1567 bswaptls(&sym->st_size);
1568 bswap16s(&sym->st_shndx);
1569 }
1570
1571 #ifdef TARGET_MIPS
1572 static void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags)
1573 {
1574 bswap16s(&abiflags->version);
1575 bswap32s(&abiflags->ases);
1576 bswap32s(&abiflags->isa_ext);
1577 bswap32s(&abiflags->flags1);
1578 bswap32s(&abiflags->flags2);
1579 }
1580 #endif
1581 #else
1582 static inline void bswap_ehdr(struct elfhdr *ehdr) { }
1583 static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
1584 static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
1585 static inline void bswap_sym(struct elf_sym *sym) { }
1586 #ifdef TARGET_MIPS
1587 static inline void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags) { }
1588 #endif
1589 #endif
1590
1591 #ifdef USE_ELF_CORE_DUMP
1592 static int elf_core_dump(int, const CPUArchState *);
1593 #endif /* USE_ELF_CORE_DUMP */
1594 static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
1595
1596 /* Verify the portions of EHDR within E_IDENT for the target.
1597 This can be performed before bswapping the entire header. */
1598 static bool elf_check_ident(struct elfhdr *ehdr)
1599 {
1600 return (ehdr->e_ident[EI_MAG0] == ELFMAG0
1601 && ehdr->e_ident[EI_MAG1] == ELFMAG1
1602 && ehdr->e_ident[EI_MAG2] == ELFMAG2
1603 && ehdr->e_ident[EI_MAG3] == ELFMAG3
1604 && ehdr->e_ident[EI_CLASS] == ELF_CLASS
1605 && ehdr->e_ident[EI_DATA] == ELF_DATA
1606 && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
1607 }
1608
1609 /* Verify the portions of EHDR outside of E_IDENT for the target.
1610 This has to wait until after bswapping the header. */
1611 static bool elf_check_ehdr(struct elfhdr *ehdr)
1612 {
1613 return (elf_check_arch(ehdr->e_machine)
1614 && ehdr->e_ehsize == sizeof(struct elfhdr)
1615 && ehdr->e_phentsize == sizeof(struct elf_phdr)
1616 && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
1617 }
1618
1619 /*
1620 * 'copy_elf_strings()' copies argument/envelope strings from user
1621 * memory to free pages in kernel mem. These are in a format ready
1622 * to be put directly into the top of new user memory.
1623 *
1624 */
1625 static abi_ulong copy_elf_strings(int argc, char **argv, char *scratch,
1626 abi_ulong p, abi_ulong stack_limit)
1627 {
1628 char *tmp;
1629 int len, i;
1630 abi_ulong top = p;
1631
1632 if (!p) {
1633 return 0; /* bullet-proofing */
1634 }
1635
1636 if (STACK_GROWS_DOWN) {
1637 int offset = ((p - 1) % TARGET_PAGE_SIZE) + 1;
1638 for (i = argc - 1; i >= 0; --i) {
1639 tmp = argv[i];
1640 if (!tmp) {
1641 fprintf(stderr, "VFS: argc is wrong");
1642 exit(-1);
1643 }
1644 len = strlen(tmp) + 1;
1645 tmp += len;
1646
1647 if (len > (p - stack_limit)) {
1648 return 0;
1649 }
1650 while (len) {
1651 int bytes_to_copy = (len > offset) ? offset : len;
1652 tmp -= bytes_to_copy;
1653 p -= bytes_to_copy;
1654 offset -= bytes_to_copy;
1655 len -= bytes_to_copy;
1656
1657 memcpy_fromfs(scratch + offset, tmp, bytes_to_copy);
1658
1659 if (offset == 0) {
1660 memcpy_to_target(p, scratch, top - p);
1661 top = p;
1662 offset = TARGET_PAGE_SIZE;
1663 }
1664 }
1665 }
1666 if (p != top) {
1667 memcpy_to_target(p, scratch + offset, top - p);
1668 }
1669 } else {
1670 int remaining = TARGET_PAGE_SIZE - (p % TARGET_PAGE_SIZE);
1671 for (i = 0; i < argc; ++i) {
1672 tmp = argv[i];
1673 if (!tmp) {
1674 fprintf(stderr, "VFS: argc is wrong");
1675 exit(-1);
1676 }
1677 len = strlen(tmp) + 1;
1678 if (len > (stack_limit - p)) {
1679 return 0;
1680 }
1681 while (len) {
1682 int bytes_to_copy = (len > remaining) ? remaining : len;
1683
1684 memcpy_fromfs(scratch + (p - top), tmp, bytes_to_copy);
1685
1686 tmp += bytes_to_copy;
1687 remaining -= bytes_to_copy;
1688 p += bytes_to_copy;
1689 len -= bytes_to_copy;
1690
1691 if (remaining == 0) {
1692 memcpy_to_target(top, scratch, p - top);
1693 top = p;
1694 remaining = TARGET_PAGE_SIZE;
1695 }
1696 }
1697 }
1698 if (p != top) {
1699 memcpy_to_target(top, scratch, p - top);
1700 }
1701 }
1702
1703 return p;
1704 }
1705
1706 /* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of
1707 * argument/environment space. Newer kernels (>2.6.33) allow more,
1708 * dependent on stack size, but guarantee at least 32 pages for
1709 * backwards compatibility.
1710 */
1711 #define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE)
1712
1713 static abi_ulong setup_arg_pages(struct linux_binprm *bprm,
1714 struct image_info *info)
1715 {
1716 abi_ulong size, error, guard;
1717
1718 size = guest_stack_size;
1719 if (size < STACK_LOWER_LIMIT) {
1720 size = STACK_LOWER_LIMIT;
1721 }
1722 guard = TARGET_PAGE_SIZE;
1723 if (guard < qemu_real_host_page_size) {
1724 guard = qemu_real_host_page_size;
1725 }
1726
1727 error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
1728 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1729 if (error == -1) {
1730 perror("mmap stack");
1731 exit(-1);
1732 }
1733
1734 /* We reserve one extra page at the top of the stack as guard. */
1735 if (STACK_GROWS_DOWN) {
1736 target_mprotect(error, guard, PROT_NONE);
1737 info->stack_limit = error + guard;
1738 return info->stack_limit + size - sizeof(void *);
1739 } else {
1740 target_mprotect(error + size, guard, PROT_NONE);
1741 info->stack_limit = error + size;
1742 return error;
1743 }
1744 }
1745
1746 /* Map and zero the bss. We need to explicitly zero any fractional pages
1747 after the data section (i.e. bss). */
1748 static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot)
1749 {
1750 uintptr_t host_start, host_map_start, host_end;
1751
1752 last_bss = TARGET_PAGE_ALIGN(last_bss);
1753
1754 /* ??? There is confusion between qemu_real_host_page_size and
1755 qemu_host_page_size here and elsewhere in target_mmap, which
1756 may lead to the end of the data section mapping from the file
1757 not being mapped. At least there was an explicit test and
1758 comment for that here, suggesting that "the file size must
1759 be known". The comment probably pre-dates the introduction
1760 of the fstat system call in target_mmap which does in fact
1761 find out the size. What isn't clear is if the workaround
1762 here is still actually needed. For now, continue with it,
1763 but merge it with the "normal" mmap that would allocate the bss. */
1764
1765 host_start = (uintptr_t) g2h(elf_bss);
1766 host_end = (uintptr_t) g2h(last_bss);
1767 host_map_start = REAL_HOST_PAGE_ALIGN(host_start);
1768
1769 if (host_map_start < host_end) {
1770 void *p = mmap((void *)host_map_start, host_end - host_map_start,
1771 prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1772 if (p == MAP_FAILED) {
1773 perror("cannot mmap brk");
1774 exit(-1);
1775 }
1776 }
1777
1778 /* Ensure that the bss page(s) are valid */
1779 if ((page_get_flags(last_bss-1) & prot) != prot) {
1780 page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot | PAGE_VALID);
1781 }
1782
1783 if (host_start < host_map_start) {
1784 memset((void *)host_start, 0, host_map_start - host_start);
1785 }
1786 }
1787
1788 #ifdef TARGET_ARM
1789 static int elf_is_fdpic(struct elfhdr *exec)
1790 {
1791 return exec->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC;
1792 }
1793 #else
1794 /* Default implementation, always false. */
1795 static int elf_is_fdpic(struct elfhdr *exec)
1796 {
1797 return 0;
1798 }
1799 #endif
1800
1801 static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp)
1802 {
1803 uint16_t n;
1804 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs;
1805
1806 /* elf32_fdpic_loadseg */
1807 n = info->nsegs;
1808 while (n--) {
1809 sp -= 12;
1810 put_user_u32(loadsegs[n].addr, sp+0);
1811 put_user_u32(loadsegs[n].p_vaddr, sp+4);
1812 put_user_u32(loadsegs[n].p_memsz, sp+8);
1813 }
1814
1815 /* elf32_fdpic_loadmap */
1816 sp -= 4;
1817 put_user_u16(0, sp+0); /* version */
1818 put_user_u16(info->nsegs, sp+2); /* nsegs */
1819
1820 info->personality = PER_LINUX_FDPIC;
1821 info->loadmap_addr = sp;
1822
1823 return sp;
1824 }
1825
1826 static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
1827 struct elfhdr *exec,
1828 struct image_info *info,
1829 struct image_info *interp_info)
1830 {
1831 abi_ulong sp;
1832 abi_ulong u_argc, u_argv, u_envp, u_auxv;
1833 int size;
1834 int i;
1835 abi_ulong u_rand_bytes;
1836 uint8_t k_rand_bytes[16];
1837 abi_ulong u_platform;
1838 const char *k_platform;
1839 const int n = sizeof(elf_addr_t);
1840
1841 sp = p;
1842
1843 /* Needs to be before we load the env/argc/... */
1844 if (elf_is_fdpic(exec)) {
1845 /* Need 4 byte alignment for these structs */
1846 sp &= ~3;
1847 sp = loader_build_fdpic_loadmap(info, sp);
1848 info->other_info = interp_info;
1849 if (interp_info) {
1850 interp_info->other_info = info;
1851 sp = loader_build_fdpic_loadmap(interp_info, sp);
1852 info->interpreter_loadmap_addr = interp_info->loadmap_addr;
1853 info->interpreter_pt_dynamic_addr = interp_info->pt_dynamic_addr;
1854 } else {
1855 info->interpreter_loadmap_addr = 0;
1856 info->interpreter_pt_dynamic_addr = 0;
1857 }
1858 }
1859
1860 u_platform = 0;
1861 k_platform = ELF_PLATFORM;
1862 if (k_platform) {
1863 size_t len = strlen(k_platform) + 1;
1864 if (STACK_GROWS_DOWN) {
1865 sp -= (len + n - 1) & ~(n - 1);
1866 u_platform = sp;
1867 /* FIXME - check return value of memcpy_to_target() for failure */
1868 memcpy_to_target(sp, k_platform, len);
1869 } else {
1870 memcpy_to_target(sp, k_platform, len);
1871 u_platform = sp;
1872 sp += len + 1;
1873 }
1874 }
1875
1876 /* Provide 16 byte alignment for the PRNG, and basic alignment for
1877 * the argv and envp pointers.
1878 */
1879 if (STACK_GROWS_DOWN) {
1880 sp = QEMU_ALIGN_DOWN(sp, 16);
1881 } else {
1882 sp = QEMU_ALIGN_UP(sp, 16);
1883 }
1884
1885 /*
1886 * Generate 16 random bytes for userspace PRNG seeding (not
1887 * cryptically secure but it's not the aim of QEMU).
1888 */
1889 for (i = 0; i < 16; i++) {
1890 k_rand_bytes[i] = rand();
1891 }
1892 if (STACK_GROWS_DOWN) {
1893 sp -= 16;
1894 u_rand_bytes = sp;
1895 /* FIXME - check return value of memcpy_to_target() for failure */
1896 memcpy_to_target(sp, k_rand_bytes, 16);
1897 } else {
1898 memcpy_to_target(sp, k_rand_bytes, 16);
1899 u_rand_bytes = sp;
1900 sp += 16;
1901 }
1902
1903 size = (DLINFO_ITEMS + 1) * 2;
1904 if (k_platform)
1905 size += 2;
1906 #ifdef DLINFO_ARCH_ITEMS
1907 size += DLINFO_ARCH_ITEMS * 2;
1908 #endif
1909 #ifdef ELF_HWCAP2
1910 size += 2;
1911 #endif
1912 info->auxv_len = size * n;
1913
1914 size += envc + argc + 2;
1915 size += 1; /* argc itself */
1916 size *= n;
1917
1918 /* Allocate space and finalize stack alignment for entry now. */
1919 if (STACK_GROWS_DOWN) {
1920 u_argc = QEMU_ALIGN_DOWN(sp - size, STACK_ALIGNMENT);
1921 sp = u_argc;
1922 } else {
1923 u_argc = sp;
1924 sp = QEMU_ALIGN_UP(sp + size, STACK_ALIGNMENT);
1925 }
1926
1927 u_argv = u_argc + n;
1928 u_envp = u_argv + (argc + 1) * n;
1929 u_auxv = u_envp + (envc + 1) * n;
1930 info->saved_auxv = u_auxv;
1931 info->arg_start = u_argv;
1932 info->arg_end = u_argv + argc * n;
1933
1934 /* This is correct because Linux defines
1935 * elf_addr_t as Elf32_Off / Elf64_Off
1936 */
1937 #define NEW_AUX_ENT(id, val) do { \
1938 put_user_ual(id, u_auxv); u_auxv += n; \
1939 put_user_ual(val, u_auxv); u_auxv += n; \
1940 } while(0)
1941
1942 #ifdef ARCH_DLINFO
1943 /*
1944 * ARCH_DLINFO must come first so platform specific code can enforce
1945 * special alignment requirements on the AUXV if necessary (eg. PPC).
1946 */
1947 ARCH_DLINFO;
1948 #endif
1949 /* There must be exactly DLINFO_ITEMS entries here, or the assert
1950 * on info->auxv_len will trigger.
1951 */
1952 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff));
1953 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
1954 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
1955 if ((info->alignment & ~qemu_host_page_mask) != 0) {
1956 /* Target doesn't support host page size alignment */
1957 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
1958 } else {
1959 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(MAX(TARGET_PAGE_SIZE,
1960 qemu_host_page_size)));
1961 }
1962 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
1963 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
1964 NEW_AUX_ENT(AT_ENTRY, info->entry);
1965 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
1966 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
1967 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
1968 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
1969 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
1970 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
1971 NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
1972 NEW_AUX_ENT(AT_SECURE, (abi_ulong) qemu_getauxval(AT_SECURE));
1973
1974 #ifdef ELF_HWCAP2
1975 NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2);
1976 #endif
1977
1978 if (u_platform) {
1979 NEW_AUX_ENT(AT_PLATFORM, u_platform);
1980 }
1981 NEW_AUX_ENT (AT_NULL, 0);
1982 #undef NEW_AUX_ENT
1983
1984 /* Check that our initial calculation of the auxv length matches how much
1985 * we actually put into it.
1986 */
1987 assert(info->auxv_len == u_auxv - info->saved_auxv);
1988
1989 put_user_ual(argc, u_argc);
1990
1991 p = info->arg_strings;
1992 for (i = 0; i < argc; ++i) {
1993 put_user_ual(p, u_argv);
1994 u_argv += n;
1995 p += target_strlen(p) + 1;
1996 }
1997 put_user_ual(0, u_argv);
1998
1999 p = info->env_strings;
2000 for (i = 0; i < envc; ++i) {
2001 put_user_ual(p, u_envp);
2002 u_envp += n;
2003 p += target_strlen(p) + 1;
2004 }
2005 put_user_ual(0, u_envp);
2006
2007 return sp;
2008 }
2009
2010 unsigned long init_guest_space(unsigned long host_start,
2011 unsigned long host_size,
2012 unsigned long guest_start,
2013 bool fixed)
2014 {
2015 unsigned long current_start, aligned_start;
2016 int flags;
2017
2018 assert(host_start || host_size);
2019
2020 /* If just a starting address is given, then just verify that
2021 * address. */
2022 if (host_start && !host_size) {
2023 #if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
2024 if (init_guest_commpage(host_start, host_size) != 1) {
2025 return (unsigned long)-1;
2026 }
2027 #endif
2028 return host_start;
2029 }
2030
2031 /* Setup the initial flags and start address. */
2032 current_start = host_start & qemu_host_page_mask;
2033 flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
2034 if (fixed) {
2035 flags |= MAP_FIXED;
2036 }
2037
2038 /* Otherwise, a non-zero size region of memory needs to be mapped
2039 * and validated. */
2040
2041 #if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
2042 /* On 32-bit ARM, we need to map not just the usable memory, but
2043 * also the commpage. Try to find a suitable place by allocating
2044 * a big chunk for all of it. If host_start, then the naive
2045 * strategy probably does good enough.
2046 */
2047 if (!host_start) {
2048 unsigned long guest_full_size, host_full_size, real_start;
2049
2050 guest_full_size =
2051 (0xffff0f00 & qemu_host_page_mask) + qemu_host_page_size;
2052 host_full_size = guest_full_size - guest_start;
2053 real_start = (unsigned long)
2054 mmap(NULL, host_full_size, PROT_NONE, flags, -1, 0);
2055 if (real_start == (unsigned long)-1) {
2056 if (host_size < host_full_size - qemu_host_page_size) {
2057 /* We failed to map a continous segment, but we're
2058 * allowed to have a gap between the usable memory and
2059 * the commpage where other things can be mapped.
2060 * This sparseness gives us more flexibility to find
2061 * an address range.
2062 */
2063 goto naive;
2064 }
2065 return (unsigned long)-1;
2066 }
2067 munmap((void *)real_start, host_full_size);
2068 if (real_start & ~qemu_host_page_mask) {
2069 /* The same thing again, but with an extra qemu_host_page_size
2070 * so that we can shift around alignment.
2071 */
2072 unsigned long real_size = host_full_size + qemu_host_page_size;
2073 real_start = (unsigned long)
2074 mmap(NULL, real_size, PROT_NONE, flags, -1, 0);
2075 if (real_start == (unsigned long)-1) {
2076 if (host_size < host_full_size - qemu_host_page_size) {
2077 goto naive;
2078 }
2079 return (unsigned long)-1;
2080 }
2081 munmap((void *)real_start, real_size);
2082 real_start = HOST_PAGE_ALIGN(real_start);
2083 }
2084 current_start = real_start;
2085 }
2086 naive:
2087 #endif
2088
2089 while (1) {
2090 unsigned long real_start, real_size, aligned_size;
2091 aligned_size = real_size = host_size;
2092
2093 /* Do not use mmap_find_vma here because that is limited to the
2094 * guest address space. We are going to make the
2095 * guest address space fit whatever we're given.
2096 */
2097 real_start = (unsigned long)
2098 mmap((void *)current_start, host_size, PROT_NONE, flags, -1, 0);
2099 if (real_start == (unsigned long)-1) {
2100 return (unsigned long)-1;
2101 }
2102
2103 /* Check to see if the address is valid. */
2104 if (host_start && real_start != current_start) {
2105 goto try_again;
2106 }
2107
2108 /* Ensure the address is properly aligned. */
2109 if (real_start & ~qemu_host_page_mask) {
2110 /* Ideally, we adjust like
2111 *
2112 * pages: [ ][ ][ ][ ][ ]
2113 * old: [ real ]
2114 * [ aligned ]
2115 * new: [ real ]
2116 * [ aligned ]
2117 *
2118 * But if there is something else mapped right after it,
2119 * then obviously it won't have room to grow, and the
2120 * kernel will put the new larger real someplace else with
2121 * unknown alignment (if we made it to here, then
2122 * fixed=false). Which is why we grow real by a full page
2123 * size, instead of by part of one; so that even if we get
2124 * moved, we can still guarantee alignment. But this does
2125 * mean that there is a padding of < 1 page both before
2126 * and after the aligned range; the "after" could could
2127 * cause problems for ARM emulation where it could butt in
2128 * to where we need to put the commpage.
2129 */
2130 munmap((void *)real_start, host_size);
2131 real_size = aligned_size + qemu_host_page_size;
2132 real_start = (unsigned long)
2133 mmap((void *)real_start, real_size, PROT_NONE, flags, -1, 0);
2134 if (real_start == (unsigned long)-1) {
2135 return (unsigned long)-1;
2136 }
2137 aligned_start = HOST_PAGE_ALIGN(real_start);
2138 } else {
2139 aligned_start = real_start;
2140 }
2141
2142 #if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
2143 /* On 32-bit ARM, we need to also be able to map the commpage. */
2144 int valid = init_guest_commpage(aligned_start - guest_start,
2145 aligned_size + guest_start);
2146 if (valid == -1) {
2147 munmap((void *)real_start, real_size);
2148 return (unsigned long)-1;
2149 } else if (valid == 0) {
2150 goto try_again;
2151 }
2152 #endif
2153
2154 /* If nothing has said `return -1` or `goto try_again` yet,
2155 * then the address we have is good.
2156 */
2157 break;
2158
2159 try_again:
2160 /* That address didn't work. Unmap and try a different one.
2161 * The address the host picked because is typically right at
2162 * the top of the host address space and leaves the guest with
2163 * no usable address space. Resort to a linear search. We
2164 * already compensated for mmap_min_addr, so this should not
2165 * happen often. Probably means we got unlucky and host
2166 * address space randomization put a shared library somewhere
2167 * inconvenient.
2168 *
2169 * This is probably a good strategy if host_start, but is
2170 * probably a bad strategy if not, which means we got here
2171 * because of trouble with ARM commpage setup.
2172 */
2173 munmap((void *)real_start, real_size);
2174 current_start += qemu_host_page_size;
2175 if (host_start == current_start) {
2176 /* Theoretically possible if host doesn't have any suitably
2177 * aligned areas. Normally the first mmap will fail.
2178 */
2179 return (unsigned long)-1;
2180 }
2181 }
2182
2183 qemu_log_mask(CPU_LOG_PAGE, "Reserved 0x%lx bytes of guest address space\n", host_size);
2184
2185 return aligned_start;
2186 }
2187
2188 static void probe_guest_base(const char *image_name,
2189 abi_ulong loaddr, abi_ulong hiaddr)
2190 {
2191 /* Probe for a suitable guest base address, if the user has not set
2192 * it explicitly, and set guest_base appropriately.
2193 * In case of error we will print a suitable message and exit.
2194 */
2195 const char *errmsg;
2196 if (!have_guest_base && !reserved_va) {
2197 unsigned long host_start, real_start, host_size;
2198
2199 /* Round addresses to page boundaries. */
2200 loaddr &= qemu_host_page_mask;
2201 hiaddr = HOST_PAGE_ALIGN(hiaddr);
2202
2203 if (loaddr < mmap_min_addr) {
2204 host_start = HOST_PAGE_ALIGN(mmap_min_addr);
2205 } else {
2206 host_start = loaddr;
2207 if (host_start != loaddr) {
2208 errmsg = "Address overflow loading ELF binary";
2209 goto exit_errmsg;
2210 }
2211 }
2212 host_size = hiaddr - loaddr;
2213
2214 /* Setup the initial guest memory space with ranges gleaned from
2215 * the ELF image that is being loaded.
2216 */
2217 real_start = init_guest_space(host_start, host_size, loaddr, false);
2218 if (real_start == (unsigned long)-1) {
2219 errmsg = "Unable to find space for application";
2220 goto exit_errmsg;
2221 }
2222 guest_base = real_start - loaddr;
2223
2224 qemu_log_mask(CPU_LOG_PAGE, "Relocating guest address space from 0x"
2225 TARGET_ABI_FMT_lx " to 0x%lx\n",
2226 loaddr, real_start);
2227 }
2228 return;
2229
2230 exit_errmsg:
2231 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2232 exit(-1);
2233 }
2234
2235
2236 /* Load an ELF image into the address space.
2237
2238 IMAGE_NAME is the filename of the image, to use in error messages.
2239 IMAGE_FD is the open file descriptor for the image.
2240
2241 BPRM_BUF is a copy of the beginning of the file; this of course
2242 contains the elf file header at offset 0. It is assumed that this
2243 buffer is sufficiently aligned to present no problems to the host
2244 in accessing data at aligned offsets within the buffer.
2245
2246 On return: INFO values will be filled in, as necessary or available. */
2247
2248 static void load_elf_image(const char *image_name, int image_fd,
2249 struct image_info *info, char **pinterp_name,
2250 char bprm_buf[BPRM_BUF_SIZE])
2251 {
2252 struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
2253 struct elf_phdr *phdr;
2254 abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
2255 int i, retval;
2256 const char *errmsg;
2257
2258 /* First of all, some simple consistency checks */
2259 errmsg = "Invalid ELF image for this architecture";
2260 if (!elf_check_ident(ehdr)) {
2261 goto exit_errmsg;
2262 }
2263 bswap_ehdr(ehdr);
2264 if (!elf_check_ehdr(ehdr)) {
2265 goto exit_errmsg;
2266 }
2267
2268 i = ehdr->e_phnum * sizeof(struct elf_phdr);
2269 if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
2270 phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
2271 } else {
2272 phdr = (struct elf_phdr *) alloca(i);
2273 retval = pread(image_fd, phdr, i, ehdr->e_phoff);
2274 if (retval != i) {
2275 goto exit_read;
2276 }
2277 }
2278 bswap_phdr(phdr, ehdr->e_phnum);
2279
2280 info->nsegs = 0;
2281 info->pt_dynamic_addr = 0;
2282
2283 mmap_lock();
2284
2285 /* Find the maximum size of the image and allocate an appropriate
2286 amount of memory to handle that. */
2287 loaddr = -1, hiaddr = 0;
2288 info->alignment = 0;
2289 for (i = 0; i < ehdr->e_phnum; ++i) {
2290 if (phdr[i].p_type == PT_LOAD) {
2291 abi_ulong a = phdr[i].p_vaddr - phdr[i].p_offset;
2292 if (a < loaddr) {
2293 loaddr = a;
2294 }
2295 a = phdr[i].p_vaddr + phdr[i].p_memsz;
2296 if (a > hiaddr) {
2297 hiaddr = a;
2298 }
2299 ++info->nsegs;
2300 info->alignment |= phdr[i].p_align;
2301 }
2302 }
2303
2304 load_addr = loaddr;
2305 if (ehdr->e_type == ET_DYN) {
2306 /* The image indicates that it can be loaded anywhere. Find a
2307 location that can hold the memory space required. If the
2308 image is pre-linked, LOADDR will be non-zero. Since we do
2309 not supply MAP_FIXED here we'll use that address if and
2310 only if it remains available. */
2311 load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
2312 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
2313 -1, 0);
2314 if (load_addr == -1) {
2315 goto exit_perror;
2316 }
2317 } else if (pinterp_name != NULL) {
2318 /* This is the main executable. Make sure that the low
2319 address does not conflict with MMAP_MIN_ADDR or the
2320 QEMU application itself. */
2321 probe_guest_base(image_name, loaddr, hiaddr);
2322 }
2323 load_bias = load_addr - loaddr;
2324
2325 if (elf_is_fdpic(ehdr)) {
2326 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs =
2327 g_malloc(sizeof(*loadsegs) * info->nsegs);
2328
2329 for (i = 0; i < ehdr->e_phnum; ++i) {
2330 switch (phdr[i].p_type) {
2331 case PT_DYNAMIC:
2332 info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias;
2333 break;
2334 case PT_LOAD:
2335 loadsegs->addr = phdr[i].p_vaddr + load_bias;
2336 loadsegs->p_vaddr = phdr[i].p_vaddr;
2337 loadsegs->p_memsz = phdr[i].p_memsz;
2338 ++loadsegs;
2339 break;
2340 }
2341 }
2342 }
2343
2344 info->load_bias = load_bias;
2345 info->load_addr = load_addr;
2346 info->entry = ehdr->e_entry + load_bias;
2347 info->start_code = -1;
2348 info->end_code = 0;
2349 info->start_data = -1;
2350 info->end_data = 0;
2351 info->brk = 0;
2352 info->elf_flags = ehdr->e_flags;
2353
2354 for (i = 0; i < ehdr->e_phnum; i++) {
2355 struct elf_phdr *eppnt = phdr + i;
2356 if (eppnt->p_type == PT_LOAD) {
2357 abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em, vaddr_len;
2358 int elf_prot = 0;
2359
2360 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
2361 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
2362 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
2363
2364 vaddr = load_bias + eppnt->p_vaddr;
2365 vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
2366 vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
2367 vaddr_len = TARGET_ELF_PAGELENGTH(eppnt->p_filesz + vaddr_po);
2368
2369 /*
2370 * Some segments may be completely empty without any backing file
2371 * segment, in that case just let zero_bss allocate an empty buffer
2372 * for it.
2373 */
2374 if (eppnt->p_filesz != 0) {
2375 error = target_mmap(vaddr_ps, vaddr_len, elf_prot,
2376 MAP_PRIVATE | MAP_FIXED,
2377 image_fd, eppnt->p_offset - vaddr_po);
2378
2379 if (error == -1) {
2380 goto exit_perror;
2381 }
2382 }
2383
2384 vaddr_ef = vaddr + eppnt->p_filesz;
2385 vaddr_em = vaddr + eppnt->p_memsz;
2386
2387 /* If the load segment requests extra zeros (e.g. bss), map it. */
2388 if (vaddr_ef < vaddr_em) {
2389 zero_bss(vaddr_ef, vaddr_em, elf_prot);
2390 }
2391
2392 /* Find the full program boundaries. */
2393 if (elf_prot & PROT_EXEC) {
2394 if (vaddr < info->start_code) {
2395 info->start_code = vaddr;
2396 }
2397 if (vaddr_ef > info->end_code) {
2398 info->end_code = vaddr_ef;
2399 }
2400 }
2401 if (elf_prot & PROT_WRITE) {
2402 if (vaddr < info->start_data) {
2403 info->start_data = vaddr;
2404 }
2405 if (vaddr_ef > info->end_data) {
2406 info->end_data = vaddr_ef;
2407 }
2408 if (vaddr_em > info->brk) {
2409 info->brk = vaddr_em;
2410 }
2411 }
2412 } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
2413 char *interp_name;
2414
2415 if (*pinterp_name) {
2416 errmsg = "Multiple PT_INTERP entries";
2417 goto exit_errmsg;
2418 }
2419 interp_name = malloc(eppnt->p_filesz);
2420 if (!interp_name) {
2421 goto exit_perror;
2422 }
2423
2424 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2425 memcpy(interp_name, bprm_buf + eppnt->p_offset,
2426 eppnt->p_filesz);
2427 } else {
2428 retval = pread(image_fd, interp_name, eppnt->p_filesz,
2429 eppnt->p_offset);
2430 if (retval != eppnt->p_filesz) {
2431 goto exit_perror;
2432 }
2433 }
2434 if (interp_name[eppnt->p_filesz - 1] != 0) {
2435 errmsg = "Invalid PT_INTERP entry";
2436 goto exit_errmsg;
2437 }
2438 *pinterp_name = interp_name;
2439 #ifdef TARGET_MIPS
2440 } else if (eppnt->p_type == PT_MIPS_ABIFLAGS) {
2441 Mips_elf_abiflags_v0 abiflags;
2442 if (eppnt->p_filesz < sizeof(Mips_elf_abiflags_v0)) {
2443 errmsg = "Invalid PT_MIPS_ABIFLAGS entry";
2444 goto exit_errmsg;
2445 }
2446 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2447 memcpy(&abiflags, bprm_buf + eppnt->p_offset,
2448 sizeof(Mips_elf_abiflags_v0));
2449 } else {
2450 retval = pread(image_fd, &abiflags, sizeof(Mips_elf_abiflags_v0),
2451 eppnt->p_offset);
2452 if (retval != sizeof(Mips_elf_abiflags_v0)) {
2453 goto exit_perror;
2454 }
2455 }
2456 bswap_mips_abiflags(&abiflags);
2457 info->fp_abi = abiflags.fp_abi;
2458 #endif
2459 }
2460 }
2461
2462 if (info->end_data == 0) {
2463 info->start_data = info->end_code;
2464 info->end_data = info->end_code;
2465 info->brk = info->end_code;
2466 }
2467
2468 if (qemu_log_enabled()) {
2469 load_symbols(ehdr, image_fd, load_bias);
2470 }
2471
2472 mmap_unlock();
2473
2474 close(image_fd);
2475 return;
2476
2477 exit_read:
2478 if (retval >= 0) {
2479 errmsg = "Incomplete read of file header";
2480 goto exit_errmsg;
2481 }
2482 exit_perror:
2483 errmsg = strerror(errno);
2484 exit_errmsg:
2485 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2486 exit(-1);
2487 }
2488
2489 static void load_elf_interp(const char *filename, struct image_info *info,
2490 char bprm_buf[BPRM_BUF_SIZE])
2491 {
2492 int fd, retval;
2493
2494 fd = open(path(filename), O_RDONLY);
2495 if (fd < 0) {
2496 goto exit_perror;
2497 }
2498
2499 retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
2500 if (retval < 0) {
2501 goto exit_perror;
2502 }
2503 if (retval < BPRM_BUF_SIZE) {
2504 memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
2505 }
2506
2507 load_elf_image(filename, fd, info, NULL, bprm_buf);
2508 return;
2509
2510 exit_perror:
2511 fprintf(stderr, "%s: %s\n", filename, strerror(errno));
2512 exit(-1);
2513 }
2514
2515 static int symfind(const void *s0, const void *s1)
2516 {
2517 target_ulong addr = *(target_ulong *)s0;
2518 struct elf_sym *sym = (struct elf_sym *)s1;
2519 int result = 0;
2520 if (addr < sym->st_value) {
2521 result = -1;
2522 } else if (addr >= sym->st_value + sym->st_size) {
2523 result = 1;
2524 }
2525 return result;
2526 }
2527
2528 static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
2529 {
2530 #if ELF_CLASS == ELFCLASS32
2531 struct elf_sym *syms = s->disas_symtab.elf32;
2532 #else
2533 struct elf_sym *syms = s->disas_symtab.elf64;
2534 #endif
2535
2536 // binary search
2537 struct elf_sym *sym;
2538
2539 sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind);
2540 if (sym != NULL) {
2541 return s->disas_strtab + sym->st_name;
2542 }
2543
2544 return "";
2545 }
2546
2547 /* FIXME: This should use elf_ops.h */
2548 static int symcmp(const void *s0, const void *s1)
2549 {
2550 struct elf_sym *sym0 = (struct elf_sym *)s0;
2551 struct elf_sym *sym1 = (struct elf_sym *)s1;
2552 return (sym0->st_value < sym1->st_value)
2553 ? -1
2554 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
2555 }
2556
2557 /* Best attempt to load symbols from this ELF object. */
2558 static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
2559 {
2560 int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
2561 uint64_t segsz;
2562 struct elf_shdr *shdr;
2563 char *strings = NULL;
2564 struct syminfo *s = NULL;
2565 struct elf_sym *new_syms, *syms = NULL;
2566
2567 shnum = hdr->e_shnum;
2568 i = shnum * sizeof(struct elf_shdr);
2569 shdr = (struct elf_shdr *)alloca(i);
2570 if (pread(fd, shdr, i, hdr->e_shoff) != i) {
2571 return;
2572 }
2573
2574 bswap_shdr(shdr, shnum);
2575 for (i = 0; i < shnum; ++i) {
2576 if (shdr[i].sh_type == SHT_SYMTAB) {
2577 sym_idx = i;
2578 str_idx = shdr[i].sh_link;
2579 goto found;
2580 }
2581 }
2582
2583 /* There will be no symbol table if the file was stripped. */
2584 return;
2585
2586 found:
2587 /* Now know where the strtab and symtab are. Snarf them. */
2588 s = g_try_new(struct syminfo, 1);
2589 if (!s) {
2590 goto give_up;
2591 }
2592
2593 segsz = shdr[str_idx].sh_size;
2594 s->disas_strtab = strings = g_try_malloc(segsz);
2595 if (!strings ||
2596 pread(fd, strings, segsz, shdr[str_idx].sh_offset) != segsz) {
2597 goto give_up;
2598 }
2599
2600 segsz = shdr[sym_idx].sh_size;
2601 syms = g_try_malloc(segsz);
2602 if (!syms || pread(fd, syms, segsz, shdr[sym_idx].sh_offset) != segsz) {
2603 goto give_up;
2604 }
2605
2606 if (segsz / sizeof(struct elf_sym) > INT_MAX) {
2607 /* Implausibly large symbol table: give up rather than ploughing
2608 * on with the number of symbols calculation overflowing
2609 */
2610 goto give_up;
2611 }
2612 nsyms = segsz / sizeof(struct elf_sym);
2613 for (i = 0; i < nsyms; ) {
2614 bswap_sym(syms + i);
2615 /* Throw away entries which we do not need. */
2616 if (syms[i].st_shndx == SHN_UNDEF
2617 || syms[i].st_shndx >= SHN_LORESERVE
2618 || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
2619 if (i < --nsyms) {
2620 syms[i] = syms[nsyms];
2621 }
2622 } else {
2623 #if defined(TARGET_ARM) || defined (TARGET_MIPS)
2624 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
2625 syms[i].st_value &= ~(target_ulong)1;
2626 #endif
2627 syms[i].st_value += load_bias;
2628 i++;
2629 }
2630 }
2631
2632 /* No "useful" symbol. */
2633 if (nsyms == 0) {
2634 goto give_up;
2635 }
2636
2637 /* Attempt to free the storage associated with the local symbols
2638 that we threw away. Whether or not this has any effect on the
2639 memory allocation depends on the malloc implementation and how
2640 many symbols we managed to discard. */
2641 new_syms = g_try_renew(struct elf_sym, syms, nsyms);
2642 if (new_syms == NULL) {
2643 goto give_up;
2644 }
2645 syms = new_syms;
2646
2647 qsort(syms, nsyms, sizeof(*syms), symcmp);
2648
2649 s->disas_num_syms = nsyms;
2650 #if ELF_CLASS == ELFCLASS32
2651 s->disas_symtab.elf32 = syms;
2652 #else
2653 s->disas_symtab.elf64 = syms;
2654 #endif
2655 s->lookup_symbol = lookup_symbolxx;
2656 s->next = syminfos;
2657 syminfos = s;
2658
2659 return;
2660
2661 give_up:
2662 g_free(s);
2663 g_free(strings);
2664 g_free(syms);
2665 }
2666
2667 uint32_t get_elf_eflags(int fd)
2668 {
2669 struct elfhdr ehdr;
2670 off_t offset;
2671 int ret;
2672
2673 /* Read ELF header */
2674 offset = lseek(fd, 0, SEEK_SET);
2675 if (offset == (off_t) -1) {
2676 return 0;
2677 }
2678 ret = read(fd, &ehdr, sizeof(ehdr));
2679 if (ret < sizeof(ehdr)) {
2680 return 0;
2681 }
2682 offset = lseek(fd, offset, SEEK_SET);
2683 if (offset == (off_t) -1) {
2684 return 0;
2685 }
2686
2687 /* Check ELF signature */
2688 if (!elf_check_ident(&ehdr)) {
2689 return 0;
2690 }
2691
2692 /* check header */
2693 bswap_ehdr(&ehdr);
2694 if (!elf_check_ehdr(&ehdr)) {
2695 return 0;
2696 }
2697
2698 /* return architecture id */
2699 return ehdr.e_flags;
2700 }
2701
2702 int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
2703 {
2704 struct image_info interp_info;
2705 struct elfhdr elf_ex;
2706 char *elf_interpreter = NULL;
2707 char *scratch;
2708
2709 memset(&interp_info, 0, sizeof(interp_info));
2710 #ifdef TARGET_MIPS
2711 interp_info.fp_abi = MIPS_ABI_FP_UNKNOWN;
2712 #endif
2713
2714 info->start_mmap = (abi_ulong)ELF_START_MMAP;
2715
2716 load_elf_image(bprm->filename, bprm->fd, info,
2717 &elf_interpreter, bprm->buf);
2718
2719 /* ??? We need a copy of the elf header for passing to create_elf_tables.
2720 If we do nothing, we'll have overwritten this when we re-use bprm->buf
2721 when we load the interpreter. */
2722 elf_ex = *(struct elfhdr *)bprm->buf;
2723
2724 /* Do this so that we can load the interpreter, if need be. We will
2725 change some of these later */
2726 bprm->p = setup_arg_pages(bprm, info);
2727
2728 scratch = g_new0(char, TARGET_PAGE_SIZE);
2729 if (STACK_GROWS_DOWN) {
2730 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2731 bprm->p, info->stack_limit);
2732 info->file_string = bprm->p;
2733 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2734 bprm->p, info->stack_limit);
2735 info->env_strings = bprm->p;
2736 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2737 bprm->p, info->stack_limit);
2738 info->arg_strings = bprm->p;
2739 } else {
2740 info->arg_strings = bprm->p;
2741 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2742 bprm->p, info->stack_limit);
2743 info->env_strings = bprm->p;
2744 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2745 bprm->p, info->stack_limit);
2746 info->file_string = bprm->p;
2747 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2748 bprm->p, info->stack_limit);
2749 }
2750
2751 g_free(scratch);
2752
2753 if (!bprm->p) {
2754 fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
2755 exit(-1);
2756 }
2757
2758 if (elf_interpreter) {
2759 load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
2760
2761 /* If the program interpreter is one of these two, then assume
2762 an iBCS2 image. Otherwise assume a native linux image. */
2763
2764 if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
2765 || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
2766 info->personality = PER_SVR4;
2767
2768 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
2769 and some applications "depend" upon this behavior. Since
2770 we do not have the power to recompile these, we emulate
2771 the SVr4 behavior. Sigh. */
2772 target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
2773 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
2774 }
2775 #ifdef TARGET_MIPS
2776 info->interp_fp_abi = interp_info.fp_abi;
2777 #endif
2778 }
2779
2780 bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
2781 info, (elf_interpreter ? &interp_info : NULL));
2782 info->start_stack = bprm->p;
2783
2784 /* If we have an interpreter, set that as the program's entry point.
2785 Copy the load_bias as well, to help PPC64 interpret the entry
2786 point as a function descriptor. Do this after creating elf tables
2787 so that we copy the original program entry point into the AUXV. */
2788 if (elf_interpreter) {
2789 info->load_bias = interp_info.load_bias;
2790 info->entry = interp_info.entry;
2791 free(elf_interpreter);
2792 }
2793
2794 #ifdef USE_ELF_CORE_DUMP
2795 bprm->core_dump = &elf_core_dump;
2796 #endif
2797
2798 return 0;
2799 }
2800
2801 #ifdef USE_ELF_CORE_DUMP
2802 /*
2803 * Definitions to generate Intel SVR4-like core files.
2804 * These mostly have the same names as the SVR4 types with "target_elf_"
2805 * tacked on the front to prevent clashes with linux definitions,
2806 * and the typedef forms have been avoided. This is mostly like
2807 * the SVR4 structure, but more Linuxy, with things that Linux does
2808 * not support and which gdb doesn't really use excluded.
2809 *
2810 * Fields we don't dump (their contents is zero) in linux-user qemu
2811 * are marked with XXX.
2812 *
2813 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
2814 *
2815 * Porting ELF coredump for target is (quite) simple process. First you
2816 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
2817 * the target resides):
2818 *
2819 * #define USE_ELF_CORE_DUMP
2820 *
2821 * Next you define type of register set used for dumping. ELF specification
2822 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
2823 *
2824 * typedef <target_regtype> target_elf_greg_t;
2825 * #define ELF_NREG <number of registers>
2826 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
2827 *
2828 * Last step is to implement target specific function that copies registers
2829 * from given cpu into just specified register set. Prototype is:
2830 *
2831 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
2832 * const CPUArchState *env);
2833 *
2834 * Parameters:
2835 * regs - copy register values into here (allocated and zeroed by caller)
2836 * env - copy registers from here
2837 *
2838 * Example for ARM target is provided in this file.
2839 */
2840
2841 /* An ELF note in memory */
2842 struct memelfnote {
2843 const char *name;
2844 size_t namesz;
2845 size_t namesz_rounded;
2846 int type;
2847 size_t datasz;
2848 size_t datasz_rounded;
2849 void *data;
2850 size_t notesz;
2851 };
2852
2853 struct target_elf_siginfo {
2854 abi_int si_signo; /* signal number */
2855 abi_int si_code; /* extra code */
2856 abi_int si_errno; /* errno */
2857 };
2858
2859 struct target_elf_prstatus {
2860 struct target_elf_siginfo pr_info; /* Info associated with signal */
2861 abi_short pr_cursig; /* Current signal */
2862 abi_ulong pr_sigpend; /* XXX */
2863 abi_ulong pr_sighold; /* XXX */
2864 target_pid_t pr_pid;
2865 target_pid_t pr_ppid;
2866 target_pid_t pr_pgrp;
2867 target_pid_t pr_sid;
2868 struct target_timeval pr_utime; /* XXX User time */
2869 struct target_timeval pr_stime; /* XXX System time */
2870 struct target_timeval pr_cutime; /* XXX Cumulative user time */
2871 struct target_timeval pr_cstime; /* XXX Cumulative system time */
2872 target_elf_gregset_t pr_reg; /* GP registers */
2873 abi_int pr_fpvalid; /* XXX */
2874 };
2875
2876 #define ELF_PRARGSZ (80) /* Number of chars for args */
2877
2878 struct target_elf_prpsinfo {
2879 char pr_state; /* numeric process state */
2880 char pr_sname; /* char for pr_state */
2881 char pr_zomb; /* zombie */
2882 char pr_nice; /* nice val */
2883 abi_ulong pr_flag; /* flags */
2884 target_uid_t pr_uid;
2885 target_gid_t pr_gid;
2886 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
2887 /* Lots missing */
2888 char pr_fname[16] QEMU_NONSTRING; /* filename of executable */
2889 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
2890 };
2891
2892 /* Here is the structure in which status of each thread is captured. */
2893 struct elf_thread_status {
2894 QTAILQ_ENTRY(elf_thread_status) ets_link;
2895 struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
2896 #if 0
2897 elf_fpregset_t fpu; /* NT_PRFPREG */
2898 struct task_struct *thread;
2899 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
2900 #endif
2901 struct memelfnote notes[1];
2902 int num_notes;
2903 };
2904
2905 struct elf_note_info {
2906 struct memelfnote *notes;
2907 struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
2908 struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
2909
2910 QTAILQ_HEAD(, elf_thread_status) thread_list;
2911 #if 0
2912 /*
2913 * Current version of ELF coredump doesn't support
2914 * dumping fp regs etc.
2915 */
2916 elf_fpregset_t *fpu;
2917 elf_fpxregset_t *xfpu;
2918 int thread_status_size;
2919 #endif
2920 int notes_size;
2921 int numnote;
2922 };
2923
2924 struct vm_area_struct {
2925 target_ulong vma_start; /* start vaddr of memory region */
2926 target_ulong vma_end; /* end vaddr of memory region */
2927 abi_ulong vma_flags; /* protection etc. flags for the region */
2928 QTAILQ_ENTRY(vm_area_struct) vma_link;
2929 };
2930
2931 struct mm_struct {
2932 QTAILQ_HEAD(, vm_area_struct) mm_mmap;
2933 int mm_count; /* number of mappings */
2934 };
2935
2936 static struct mm_struct *vma_init(void);
2937 static void vma_delete(struct mm_struct *);
2938 static int vma_add_mapping(struct mm_struct *, target_ulong,
2939 target_ulong, abi_ulong);
2940 static int vma_get_mapping_count(const struct mm_struct *);
2941 static struct vm_area_struct *vma_first(const struct mm_struct *);
2942 static struct vm_area_struct *vma_next(struct vm_area_struct *);
2943 static abi_ulong vma_dump_size(const struct vm_area_struct *);
2944 static int vma_walker(void *priv, target_ulong start, target_ulong end,
2945 unsigned long flags);
2946
2947 static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
2948 static void fill_note(struct memelfnote *, const char *, int,
2949 unsigned int, void *);
2950 static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
2951 static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
2952 static void fill_auxv_note(struct memelfnote *, const TaskState *);
2953 static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
2954 static size_t note_size(const struct memelfnote *);
2955 static void free_note_info(struct elf_note_info *);
2956 static int fill_note_info(struct elf_note_info *, long, const CPUArchState *);
2957 static void fill_thread_info(struct elf_note_info *, const CPUArchState *);
2958 static int core_dump_filename(const TaskState *, char *, size_t);
2959
2960 static int dump_write(int, const void *, size_t);
2961 static int write_note(struct memelfnote *, int);
2962 static int write_note_info(struct elf_note_info *, int);
2963
2964 #ifdef BSWAP_NEEDED
2965 static void bswap_prstatus(struct target_elf_prstatus *prstatus)
2966 {
2967 prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo);
2968 prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code);
2969 prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno);
2970 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
2971 prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend);
2972 prstatus->pr_sighold = tswapal(prstatus->pr_sighold);
2973 prstatus->pr_pid = tswap32(prstatus->pr_pid);
2974 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
2975 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
2976 prstatus->pr_sid = tswap32(prstatus->pr_sid);
2977 /* cpu times are not filled, so we skip them */
2978 /* regs should be in correct format already */
2979 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
2980 }
2981
2982 static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
2983 {
2984 psinfo->pr_flag = tswapal(psinfo->pr_flag);
2985 psinfo->pr_uid = tswap16(psinfo->pr_uid);
2986 psinfo->pr_gid = tswap16(psinfo->pr_gid);
2987 psinfo->pr_pid = tswap32(psinfo->pr_pid);
2988 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
2989 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
2990 psinfo->pr_sid = tswap32(psinfo->pr_sid);
2991 }
2992
2993 static void bswap_note(struct elf_note *en)
2994 {
2995 bswap32s(&en->n_namesz);
2996 bswap32s(&en->n_descsz);
2997 bswap32s(&en->n_type);
2998 }
2999 #else
3000 static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
3001 static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
3002 static inline void bswap_note(struct elf_note *en) { }
3003 #endif /* BSWAP_NEEDED */
3004
3005 /*
3006 * Minimal support for linux memory regions. These are needed
3007 * when we are finding out what memory exactly belongs to
3008 * emulated process. No locks needed here, as long as
3009 * thread that received the signal is stopped.
3010 */
3011
3012 static struct mm_struct *vma_init(void)
3013 {
3014 struct mm_struct *mm;
3015
3016 if ((mm = g_malloc(sizeof (*mm))) == NULL)
3017 return (NULL);
3018
3019 mm->mm_count = 0;
3020 QTAILQ_INIT(&mm->mm_mmap);
3021
3022 return (mm);
3023 }
3024
3025 static void vma_delete(struct mm_struct *mm)
3026 {
3027 struct vm_area_struct *vma;
3028
3029 while ((vma = vma_first(mm)) != NULL) {
3030 QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
3031 g_free(vma);
3032 }
3033 g_free(mm);
3034 }
3035
3036 static int vma_add_mapping(struct mm_struct *mm, target_ulong start,
3037 target_ulong end, abi_ulong flags)
3038 {
3039 struct vm_area_struct *vma;
3040
3041 if ((vma = g_malloc0(sizeof (*vma))) == NULL)
3042 return (-1);
3043
3044 vma->vma_start = start;
3045 vma->vma_end = end;
3046 vma->vma_flags = flags;
3047
3048 QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
3049 mm->mm_count++;
3050
3051 return (0);
3052 }
3053
3054 static struct vm_area_struct *vma_first(const struct mm_struct *mm)
3055 {
3056 return (QTAILQ_FIRST(&mm->mm_mmap));
3057 }
3058
3059 static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
3060 {
3061 return (QTAILQ_NEXT(vma, vma_link));
3062 }
3063
3064 static int vma_get_mapping_count(const struct mm_struct *mm)
3065 {
3066 return (mm->mm_count);
3067 }
3068
3069 /*
3070 * Calculate file (dump) size of given memory region.
3071 */
3072 static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
3073 {
3074 /* if we cannot even read the first page, skip it */
3075 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
3076 return (0);
3077
3078 /*
3079 * Usually we don't dump executable pages as they contain
3080 * non-writable code that debugger can read directly from
3081 * target library etc. However, thread stacks are marked
3082 * also executable so we read in first page of given region
3083 * and check whether it contains elf header. If there is
3084 * no elf header, we dump it.
3085 */
3086 if (vma->vma_flags & PROT_EXEC) {
3087 char page[TARGET_PAGE_SIZE];
3088
3089 copy_from_user(page, vma->vma_start, sizeof (page));
3090 if ((page[EI_MAG0] == ELFMAG0) &&
3091 (page[EI_MAG1] == ELFMAG1) &&
3092 (page[EI_MAG2] == ELFMAG2) &&
3093 (page[EI_MAG3] == ELFMAG3)) {
3094 /*
3095 * Mappings are possibly from ELF binary. Don't dump
3096 * them.
3097 */
3098 return (0);
3099 }
3100 }
3101
3102 return (vma->vma_end - vma->vma_start);
3103 }
3104
3105 static int vma_walker(void *priv, target_ulong start, target_ulong end,
3106 unsigned long flags)
3107 {
3108 struct mm_struct *mm = (struct mm_struct *)priv;
3109
3110 vma_add_mapping(mm, start, end, flags);
3111 return (0);
3112 }
3113
3114 static void fill_note(struct memelfnote *note, const char *name, int type,
3115 unsigned int sz, void *data)
3116 {
3117 unsigned int namesz;
3118
3119 namesz = strlen(name) + 1;
3120 note->name = name;
3121 note->namesz = namesz;
3122 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
3123 note->type = type;
3124 note->datasz = sz;
3125 note->datasz_rounded = roundup(sz, sizeof (int32_t));
3126
3127 note->data = data;
3128
3129 /*
3130 * We calculate rounded up note size here as specified by
3131 * ELF document.
3132 */
3133 note->notesz = sizeof (struct elf_note) +
3134 note->namesz_rounded + note->datasz_rounded;
3135 }
3136
3137 static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
3138 uint32_t flags)
3139 {
3140 (void) memset(elf, 0, sizeof(*elf));
3141
3142 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
3143 elf->e_ident[EI_CLASS] = ELF_CLASS;
3144 elf->e_ident[EI_DATA] = ELF_DATA;
3145 elf->e_ident[EI_VERSION] = EV_CURRENT;
3146 elf->e_ident[EI_OSABI] = ELF_OSABI;
3147
3148 elf->e_type = ET_CORE;
3149 elf->e_machine = machine;
3150 elf->e_version = EV_CURRENT;
3151 elf->e_phoff = sizeof(struct elfhdr);
3152 elf->e_flags = flags;
3153 elf->e_ehsize = sizeof(struct elfhdr);
3154 elf->e_phentsize = sizeof(struct elf_phdr);
3155 elf->e_phnum = segs;
3156
3157 bswap_ehdr(elf);
3158 }
3159
3160 static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
3161 {
3162 phdr->p_type = PT_NOTE;
3163 phdr->p_offset = offset;
3164 phdr->p_vaddr = 0;
3165 phdr->p_paddr = 0;
3166 phdr->p_filesz = sz;
3167 phdr->p_memsz = 0;
3168 phdr->p_flags = 0;
3169 phdr->p_align = 0;
3170
3171 bswap_phdr(phdr, 1);
3172 }
3173
3174 static size_t note_size(const struct memelfnote *note)
3175 {
3176 return (note->notesz);
3177 }
3178
3179 static void fill_prstatus(struct target_elf_prstatus *prstatus,
3180 const TaskState *ts, int signr)
3181 {
3182 (void) memset(prstatus, 0, sizeof (*prstatus));
3183 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
3184 prstatus->pr_pid = ts->ts_tid;
3185 prstatus->pr_ppid = getppid();
3186 prstatus->pr_pgrp = getpgrp();
3187 prstatus->pr_sid = getsid(0);
3188
3189 bswap_prstatus(prstatus);
3190 }
3191
3192 static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
3193 {
3194 char *base_filename;
3195 unsigned int i, len;
3196
3197 (void) memset(psinfo, 0, sizeof (*psinfo));
3198
3199 len = ts->info->arg_end - ts->info->arg_start;
3200 if (len >= ELF_PRARGSZ)
3201 len = ELF_PRARGSZ - 1;
3202 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
3203 return -EFAULT;
3204 for (i = 0; i < len; i++)
3205 if (psinfo->pr_psargs[i] == 0)
3206 psinfo->pr_psargs[i] = ' ';
3207 psinfo->pr_psargs[len] = 0;
3208
3209 psinfo->pr_pid = getpid();
3210 psinfo->pr_ppid = getppid();
3211 psinfo->pr_pgrp = getpgrp();
3212 psinfo->pr_sid = getsid(0);
3213 psinfo->pr_uid = getuid();
3214 psinfo->pr_gid = getgid();
3215
3216 base_filename = g_path_get_basename(ts->bprm->filename);
3217 /*
3218 * Using strncpy here is fine: at max-length,
3219 * this field is not NUL-terminated.
3220 */
3221 (void) strncpy(psinfo->pr_fname, base_filename,
3222 sizeof(psinfo->pr_fname));
3223
3224 g_free(base_filename);
3225 bswap_psinfo(psinfo);
3226 return (0);
3227 }
3228
3229 static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
3230 {
3231 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
3232 elf_addr_t orig_auxv = auxv;
3233 void *ptr;
3234 int len = ts->info->auxv_len;
3235
3236 /*
3237 * Auxiliary vector is stored in target process stack. It contains
3238 * {type, value} pairs that we need to dump into note. This is not
3239 * strictly necessary but we do it here for sake of completeness.
3240 */
3241
3242 /* read in whole auxv vector and copy it to memelfnote */
3243 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
3244 if (ptr != NULL) {
3245 fill_note(note, "CORE", NT_AUXV, len, ptr);
3246 unlock_user(ptr, auxv, len);
3247 }
3248 }
3249
3250 /*
3251 * Constructs name of coredump file. We have following convention
3252 * for the name:
3253 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
3254 *
3255 * Returns 0 in case of success, -1 otherwise (errno is set).
3256 */
3257 static int core_dump_filename(const TaskState *ts, char *buf,
3258 size_t bufsize)
3259 {
3260 char timestamp[64];
3261 char *base_filename = NULL;
3262 struct timeval tv;
3263 struct tm tm;
3264
3265 assert(bufsize >= PATH_MAX);
3266
3267 if (gettimeofday(&tv, NULL) < 0) {
3268 (void) fprintf(stderr, "unable to get current timestamp: %s",
3269 strerror(errno));
3270 return (-1);
3271 }
3272
3273 base_filename = g_path_get_basename(ts->bprm->filename);
3274 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
3275 localtime_r(&tv.tv_sec, &tm));
3276 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
3277 base_filename, timestamp, (int)getpid());
3278 g_free(base_filename);
3279
3280 return (0);
3281 }
3282
3283 static int dump_write(int fd, const void *ptr, size_t size)
3284 {
3285 const char *bufp = (const char *)ptr;
3286 ssize_t bytes_written, bytes_left;
3287 struct rlimit dumpsize;
3288 off_t pos;
3289
3290 bytes_written = 0;
3291 getrlimit(RLIMIT_CORE, &dumpsize);
3292 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
3293 if (errno == ESPIPE) { /* not a seekable stream */
3294 bytes_left = size;
3295 } else {
3296 return pos;
3297 }
3298 } else {
3299 if (dumpsize.rlim_cur <= pos) {
3300 return -1;
3301 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
3302 bytes_left = size;
3303 } else {
3304 size_t limit_left=dumpsize.rlim_cur - pos;
3305 bytes_left = limit_left >= size ? size : limit_left ;
3306 }
3307 }
3308
3309 /*
3310 * In normal conditions, single write(2) should do but
3311 * in case of socket etc. this mechanism is more portable.
3312 */
3313 do {
3314 bytes_written = write(fd, bufp, bytes_left);
3315 if (bytes_written < 0) {
3316 if (errno == EINTR)
3317 continue;
3318 return (-1);
3319 } else if (bytes_written == 0) { /* eof */
3320 return (-1);
3321 }
3322 bufp += bytes_written;
3323 bytes_left -= bytes_written;
3324 } while (bytes_left > 0);
3325
3326 return (0);
3327 }
3328
3329 static int write_note(struct memelfnote *men, int fd)
3330 {
3331 struct elf_note en;
3332
3333 en.n_namesz = men->namesz;
3334 en.n_type = men->type;
3335 en.n_descsz = men->datasz;
3336
3337 bswap_note(&en);
3338
3339 if (dump_write(fd, &en, sizeof(en)) != 0)
3340 return (-1);
3341 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
3342 return (-1);
3343 if (dump_write(fd, men->data, men->datasz_rounded) != 0)
3344 return (-1);
3345
3346 return (0);
3347 }
3348
3349 static void fill_thread_info(struct elf_note_info *info, const CPUArchState *env)
3350 {
3351 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3352 TaskState *ts = (TaskState *)cpu->opaque;
3353 struct elf_thread_status *ets;
3354
3355 ets = g_malloc0(sizeof (*ets));
3356 ets->num_notes = 1; /* only prstatus is dumped */
3357 fill_prstatus(&ets->prstatus, ts, 0);
3358 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
3359 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
3360 &ets->prstatus);
3361
3362 QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
3363
3364 info->notes_size += note_size(&ets->notes[0]);
3365 }
3366
3367 static void init_note_info(struct elf_note_info *info)
3368 {
3369 /* Initialize the elf_note_info structure so that it is at
3370 * least safe to call free_note_info() on it. Must be
3371 * called before calling fill_note_info().
3372 */
3373 memset(info, 0, sizeof (*info));
3374 QTAILQ_INIT(&info->thread_list);
3375 }
3376
3377 static int fill_note_info(struct elf_note_info *info,
3378 long signr, const CPUArchState *env)
3379 {
3380 #define NUMNOTES 3
3381 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3382 TaskState *ts = (TaskState *)cpu->opaque;
3383 int i;
3384
3385 info->notes = g_new0(struct memelfnote, NUMNOTES);
3386 if (info->notes == NULL)
3387 return (-ENOMEM);
3388 info->prstatus = g_malloc0(sizeof (*info->prstatus));
3389 if (info->prstatus == NULL)
3390 return (-ENOMEM);
3391 info->psinfo = g_malloc0(sizeof (*info->psinfo));
3392 if (info->prstatus == NULL)
3393 return (-ENOMEM);
3394
3395 /*
3396 * First fill in status (and registers) of current thread
3397 * including process info & aux vector.
3398 */
3399 fill_prstatus(info->prstatus, ts, signr);
3400 elf_core_copy_regs(&info->prstatus->pr_reg, env);
3401 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
3402 sizeof (*info->prstatus), info->prstatus);
3403 fill_psinfo(info->psinfo, ts);
3404 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
3405 sizeof (*info->psinfo), info->psinfo);
3406 fill_auxv_note(&info->notes[2], ts);
3407 info->numnote = 3;
3408
3409 info->notes_size = 0;
3410 for (i = 0; i < info->numnote; i++)
3411 info->notes_size += note_size(&info->notes[i]);
3412
3413 /* read and fill status of all threads */
3414 cpu_list_lock();
3415 CPU_FOREACH(cpu) {
3416 if (cpu == thread_cpu) {
3417 continue;
3418 }
3419 fill_thread_info(info, (CPUArchState *)cpu->env_ptr);
3420 }
3421 cpu_list_unlock();
3422
3423 return (0);
3424 }
3425
3426 static void free_note_info(struct elf_note_info *info)
3427 {
3428 struct elf_thread_status *ets;
3429
3430 while (!QTAILQ_EMPTY(&info->thread_list)) {
3431 ets = QTAILQ_FIRST(&info->thread_list);
3432 QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
3433 g_free(ets);
3434 }
3435
3436 g_free(info->prstatus);
3437 g_free(info->psinfo);
3438 g_free(info->notes);
3439 }
3440
3441 static int write_note_info(struct elf_note_info *info, int fd)
3442 {
3443 struct elf_thread_status *ets;
3444 int i, error = 0;
3445
3446 /* write prstatus, psinfo and auxv for current thread */
3447 for (i = 0; i < info->numnote; i++)
3448 if ((error = write_note(&info->notes[i], fd)) != 0)
3449 return (error);
3450
3451 /* write prstatus for each thread */
3452 QTAILQ_FOREACH(ets, &info->thread_list, ets_link) {
3453 if ((error = write_note(&ets->notes[0], fd)) != 0)
3454 return (error);
3455 }
3456
3457 return (0);
3458 }
3459
3460 /*
3461 * Write out ELF coredump.
3462 *
3463 * See documentation of ELF object file format in:
3464 * http://www.caldera.com/developers/devspecs/gabi41.pdf
3465 *
3466 * Coredump format in linux is following:
3467 *
3468 * 0 +----------------------+ \
3469 * | ELF header | ET_CORE |
3470 * +----------------------+ |
3471 * | ELF program headers | |--- headers
3472 * | - NOTE section | |
3473 * | - PT_LOAD sections | |
3474 * +----------------------+ /
3475 * | NOTEs: |
3476 * | - NT_PRSTATUS |
3477 * | - NT_PRSINFO |
3478 * | - NT_AUXV |
3479 * +----------------------+ <-- aligned to target page
3480 * | Process memory dump |
3481 * : :
3482 * . .
3483 * : :
3484 * | |
3485 * +----------------------+
3486 *
3487 * NT_PRSTATUS -> struct elf_prstatus (per thread)
3488 * NT_PRSINFO -> struct elf_prpsinfo
3489 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
3490 *
3491 * Format follows System V format as close as possible. Current
3492 * version limitations are as follows:
3493 * - no floating point registers are dumped
3494 *
3495 * Function returns 0 in case of success, negative errno otherwise.
3496 *
3497 * TODO: make this work also during runtime: it should be
3498 * possible to force coredump from running process and then
3499 * continue processing. For example qemu could set up SIGUSR2
3500 * handler (provided that target process haven't registered
3501 * handler for that) that does the dump when signal is received.
3502 */
3503 static int elf_core_dump(int signr, const CPUArchState *env)
3504 {
3505 const CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3506 const TaskState *ts = (const TaskState *)cpu->opaque;
3507 struct vm_area_struct *vma = NULL;
3508 char corefile[PATH_MAX];
3509 struct elf_note_info info;
3510 struct elfhdr elf;
3511 struct elf_phdr phdr;
3512 struct rlimit dumpsize;
3513 struct mm_struct *mm = NULL;
3514 off_t offset = 0, data_offset = 0;
3515 int segs = 0;
3516 int fd = -1;
3517
3518 init_note_info(&info);
3519
3520 errno = 0;
3521 getrlimit(RLIMIT_CORE, &dumpsize);
3522 if (dumpsize.rlim_cur == 0)
3523 return 0;
3524
3525 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
3526 return (-errno);
3527
3528 if ((fd = open(corefile, O_WRONLY | O_CREAT,
3529 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
3530 return (-errno);
3531
3532 /*
3533 * Walk through target process memory mappings and
3534 * set up structure containing this information. After
3535 * this point vma_xxx functions can be used.
3536 */
3537 if ((mm = vma_init()) == NULL)
3538 goto out;
3539
3540 walk_memory_regions(mm, vma_walker);
3541 segs = vma_get_mapping_count(mm);
3542
3543 /*
3544 * Construct valid coredump ELF header. We also
3545 * add one more segment for notes.
3546 */
3547 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
3548 if (dump_write(fd, &elf, sizeof (elf)) != 0)
3549 goto out;
3550
3551 /* fill in the in-memory version of notes */
3552 if (fill_note_info(&info, signr, env) < 0)
3553 goto out;
3554
3555 offset += sizeof (elf); /* elf header */
3556 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
3557
3558 /* write out notes program header */
3559 fill_elf_note_phdr(&phdr, info.notes_size, offset);
3560
3561 offset += info.notes_size;
3562 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
3563 goto out;
3564
3565 /*
3566 * ELF specification wants data to start at page boundary so
3567 * we align it here.
3568 */
3569 data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE);
3570
3571 /*
3572 * Write program headers for memory regions mapped in
3573 * the target process.
3574 */
3575 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3576 (void) memset(&phdr, 0, sizeof (phdr));
3577
3578 phdr.p_type = PT_LOAD;
3579 phdr.p_offset = offset;
3580 phdr.p_vaddr = vma->vma_start;
3581 phdr.p_paddr = 0;
3582 phdr.p_filesz = vma_dump_size(vma);
3583 offset += phdr.p_filesz;
3584 phdr.p_memsz = vma->vma_end - vma->vma_start;
3585 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
3586 if (vma->vma_flags & PROT_WRITE)
3587 phdr.p_flags |= PF_W;
3588 if (vma->vma_flags & PROT_EXEC)
3589 phdr.p_flags |= PF_X;
3590 phdr.p_align = ELF_EXEC_PAGESIZE;
3591
3592 bswap_phdr(&phdr, 1);
3593 if (dump_write(fd, &phdr, sizeof(phdr)) != 0) {
3594 goto out;
3595 }
3596 }
3597
3598 /*
3599 * Next we write notes just after program headers. No
3600 * alignment needed here.
3601 */
3602 if (write_note_info(&info, fd) < 0)
3603 goto out;
3604
3605 /* align data to page boundary */
3606 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
3607 goto out;
3608
3609 /*
3610 * Finally we can dump process memory into corefile as well.
3611 */
3612 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3613 abi_ulong addr;
3614 abi_ulong end;
3615
3616 end = vma->vma_start + vma_dump_size(vma);
3617
3618 for (addr = vma->vma_start; addr < end;
3619 addr += TARGET_PAGE_SIZE) {
3620 char page[TARGET_PAGE_SIZE];
3621 int error;
3622
3623 /*
3624 * Read in page from target process memory and
3625 * write it to coredump file.
3626 */
3627 error = copy_from_user(page, addr, sizeof (page));
3628 if (error != 0) {
3629 (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
3630 addr);
3631 errno = -error;
3632 goto out;
3633 }
3634 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
3635 goto out;
3636 }
3637 }
3638
3639 out:
3640 free_note_info(&info);
3641 if (mm != NULL)
3642 vma_delete(mm);
3643 (void) close(fd);
3644
3645 if (errno != 0)
3646 return (-errno);
3647 return (0);
3648 }
3649 #endif /* USE_ELF_CORE_DUMP */
3650
3651 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
3652 {
3653 init_thread(regs, infop);
3654 }
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