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target/ppc/spapr_caps: Add new tristate cap safe_cache
[qemu/kevin.git] / linux-user / elfload.c
blob32a47674e6690d4791601644bd58222294ed9470
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 /* this flag is uneffective under linux too, should be deleted */
82 #ifndef MAP_DENYWRITE
83 #define MAP_DENYWRITE 0
84 #endif
85
86 /* should probably go in elf.h */
87 #ifndef ELIBBAD
88 #define ELIBBAD 80
89 #endif
90
91 #ifdef TARGET_WORDS_BIGENDIAN
92 #define ELF_DATA ELFDATA2MSB
93 #else
94 #define ELF_DATA ELFDATA2LSB
95 #endif
96
97 #ifdef TARGET_ABI_MIPSN32
98 typedef abi_ullong target_elf_greg_t;
99 #define tswapreg(ptr) tswap64(ptr)
100 #else
101 typedef abi_ulong target_elf_greg_t;
102 #define tswapreg(ptr) tswapal(ptr)
103 #endif
104
105 #ifdef USE_UID16
106 typedef abi_ushort target_uid_t;
107 typedef abi_ushort target_gid_t;
108 #else
109 typedef abi_uint target_uid_t;
110 typedef abi_uint target_gid_t;
111 #endif
112 typedef abi_int target_pid_t;
113
114 #ifdef TARGET_I386
115
116 #define ELF_PLATFORM get_elf_platform()
117
118 static const char *get_elf_platform(void)
119 {
120 static char elf_platform[] = "i386";
121 int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
122 if (family > 6)
123 family = 6;
124 if (family >= 3)
125 elf_platform[1] = '0' + family;
126 return elf_platform;
127 }
128
129 #define ELF_HWCAP get_elf_hwcap()
130
131 static uint32_t get_elf_hwcap(void)
132 {
133 X86CPU *cpu = X86_CPU(thread_cpu);
134
135 return cpu->env.features[FEAT_1_EDX];
136 }
137
138 #ifdef TARGET_X86_64
139 #define ELF_START_MMAP 0x2aaaaab000ULL
140
141 #define ELF_CLASS ELFCLASS64
142 #define ELF_ARCH EM_X86_64
143
144 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
145 {
146 regs->rax = 0;
147 regs->rsp = infop->start_stack;
148 regs->rip = infop->entry;
149 }
150
151 #define ELF_NREG 27
152 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
153
154 /*
155 * Note that ELF_NREG should be 29 as there should be place for
156 * TRAPNO and ERR "registers" as well but linux doesn't dump
157 * those.
158 *
159 * See linux kernel: arch/x86/include/asm/elf.h
160 */
161 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
162 {
163 (*regs)[0] = env->regs[15];
164 (*regs)[1] = env->regs[14];
165 (*regs)[2] = env->regs[13];
166 (*regs)[3] = env->regs[12];
167 (*regs)[4] = env->regs[R_EBP];
168 (*regs)[5] = env->regs[R_EBX];
169 (*regs)[6] = env->regs[11];
170 (*regs)[7] = env->regs[10];
171 (*regs)[8] = env->regs[9];
172 (*regs)[9] = env->regs[8];
173 (*regs)[10] = env->regs[R_EAX];
174 (*regs)[11] = env->regs[R_ECX];
175 (*regs)[12] = env->regs[R_EDX];
176 (*regs)[13] = env->regs[R_ESI];
177 (*regs)[14] = env->regs[R_EDI];
178 (*regs)[15] = env->regs[R_EAX]; /* XXX */
179 (*regs)[16] = env->eip;
180 (*regs)[17] = env->segs[R_CS].selector & 0xffff;
181 (*regs)[18] = env->eflags;
182 (*regs)[19] = env->regs[R_ESP];
183 (*regs)[20] = env->segs[R_SS].selector & 0xffff;
184 (*regs)[21] = env->segs[R_FS].selector & 0xffff;
185 (*regs)[22] = env->segs[R_GS].selector & 0xffff;
186 (*regs)[23] = env->segs[R_DS].selector & 0xffff;
187 (*regs)[24] = env->segs[R_ES].selector & 0xffff;
188 (*regs)[25] = env->segs[R_FS].selector & 0xffff;
189 (*regs)[26] = env->segs[R_GS].selector & 0xffff;
190 }
191
192 #else
193
194 #define ELF_START_MMAP 0x80000000
195
196 /*
197 * This is used to ensure we don't load something for the wrong architecture.
198 */
199 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
200
201 /*
202 * These are used to set parameters in the core dumps.
203 */
204 #define ELF_CLASS ELFCLASS32
205 #define ELF_ARCH EM_386
206
207 static inline void init_thread(struct target_pt_regs *regs,
208 struct image_info *infop)
209 {
210 regs->esp = infop->start_stack;
211 regs->eip = infop->entry;
212
213 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
214 starts %edx contains a pointer to a function which might be
215 registered using `atexit'. This provides a mean for the
216 dynamic linker to call DT_FINI functions for shared libraries
217 that have been loaded before the code runs.
218
219 A value of 0 tells we have no such handler. */
220 regs->edx = 0;
221 }
222
223 #define ELF_NREG 17
224 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
225
226 /*
227 * Note that ELF_NREG should be 19 as there should be place for
228 * TRAPNO and ERR "registers" as well but linux doesn't dump
229 * those.
230 *
231 * See linux kernel: arch/x86/include/asm/elf.h
232 */
233 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
234 {
235 (*regs)[0] = env->regs[R_EBX];
236 (*regs)[1] = env->regs[R_ECX];
237 (*regs)[2] = env->regs[R_EDX];
238 (*regs)[3] = env->regs[R_ESI];
239 (*regs)[4] = env->regs[R_EDI];
240 (*regs)[5] = env->regs[R_EBP];
241 (*regs)[6] = env->regs[R_EAX];
242 (*regs)[7] = env->segs[R_DS].selector & 0xffff;
243 (*regs)[8] = env->segs[R_ES].selector & 0xffff;
244 (*regs)[9] = env->segs[R_FS].selector & 0xffff;
245 (*regs)[10] = env->segs[R_GS].selector & 0xffff;
246 (*regs)[11] = env->regs[R_EAX]; /* XXX */
247 (*regs)[12] = env->eip;
248 (*regs)[13] = env->segs[R_CS].selector & 0xffff;
249 (*regs)[14] = env->eflags;
250 (*regs)[15] = env->regs[R_ESP];
251 (*regs)[16] = env->segs[R_SS].selector & 0xffff;
252 }
253 #endif
254
255 #define USE_ELF_CORE_DUMP
256 #define ELF_EXEC_PAGESIZE 4096
257
258 #endif
259
260 #ifdef TARGET_ARM
261
262 #ifndef TARGET_AARCH64
263 /* 32 bit ARM definitions */
264
265 #define ELF_START_MMAP 0x80000000
266
267 #define ELF_ARCH EM_ARM
268 #define ELF_CLASS ELFCLASS32
269
270 static inline void init_thread(struct target_pt_regs *regs,
271 struct image_info *infop)
272 {
273 abi_long stack = infop->start_stack;
274 memset(regs, 0, sizeof(*regs));
275
276 regs->uregs[16] = ARM_CPU_MODE_USR;
277 if (infop->entry & 1) {
278 regs->uregs[16] |= CPSR_T;
279 }
280 regs->uregs[15] = infop->entry & 0xfffffffe;
281 regs->uregs[13] = infop->start_stack;
282 /* FIXME - what to for failure of get_user()? */
283 get_user_ual(regs->uregs[2], stack + 8); /* envp */
284 get_user_ual(regs->uregs[1], stack + 4); /* envp */
285 /* XXX: it seems that r0 is zeroed after ! */
286 regs->uregs[0] = 0;
287 /* For uClinux PIC binaries. */
288 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
289 regs->uregs[10] = infop->start_data;
290 }
291
292 #define ELF_NREG 18
293 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
294
295 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env)
296 {
297 (*regs)[0] = tswapreg(env->regs[0]);
298 (*regs)[1] = tswapreg(env->regs[1]);
299 (*regs)[2] = tswapreg(env->regs[2]);
300 (*regs)[3] = tswapreg(env->regs[3]);
301 (*regs)[4] = tswapreg(env->regs[4]);
302 (*regs)[5] = tswapreg(env->regs[5]);
303 (*regs)[6] = tswapreg(env->regs[6]);
304 (*regs)[7] = tswapreg(env->regs[7]);
305 (*regs)[8] = tswapreg(env->regs[8]);
306 (*regs)[9] = tswapreg(env->regs[9]);
307 (*regs)[10] = tswapreg(env->regs[10]);
308 (*regs)[11] = tswapreg(env->regs[11]);
309 (*regs)[12] = tswapreg(env->regs[12]);
310 (*regs)[13] = tswapreg(env->regs[13]);
311 (*regs)[14] = tswapreg(env->regs[14]);
312 (*regs)[15] = tswapreg(env->regs[15]);
313
314 (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env));
315 (*regs)[17] = tswapreg(env->regs[0]); /* XXX */
316 }
317
318 #define USE_ELF_CORE_DUMP
319 #define ELF_EXEC_PAGESIZE 4096
320
321 enum
322 {
323 ARM_HWCAP_ARM_SWP = 1 << 0,
324 ARM_HWCAP_ARM_HALF = 1 << 1,
325 ARM_HWCAP_ARM_THUMB = 1 << 2,
326 ARM_HWCAP_ARM_26BIT = 1 << 3,
327 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
328 ARM_HWCAP_ARM_FPA = 1 << 5,
329 ARM_HWCAP_ARM_VFP = 1 << 6,
330 ARM_HWCAP_ARM_EDSP = 1 << 7,
331 ARM_HWCAP_ARM_JAVA = 1 << 8,
332 ARM_HWCAP_ARM_IWMMXT = 1 << 9,
333 ARM_HWCAP_ARM_CRUNCH = 1 << 10,
334 ARM_HWCAP_ARM_THUMBEE = 1 << 11,
335 ARM_HWCAP_ARM_NEON = 1 << 12,
336 ARM_HWCAP_ARM_VFPv3 = 1 << 13,
337 ARM_HWCAP_ARM_VFPv3D16 = 1 << 14,
338 ARM_HWCAP_ARM_TLS = 1 << 15,
339 ARM_HWCAP_ARM_VFPv4 = 1 << 16,
340 ARM_HWCAP_ARM_IDIVA = 1 << 17,
341 ARM_HWCAP_ARM_IDIVT = 1 << 18,
342 ARM_HWCAP_ARM_VFPD32 = 1 << 19,
343 ARM_HWCAP_ARM_LPAE = 1 << 20,
344 ARM_HWCAP_ARM_EVTSTRM = 1 << 21,
345 };
346
347 enum {
348 ARM_HWCAP2_ARM_AES = 1 << 0,
349 ARM_HWCAP2_ARM_PMULL = 1 << 1,
350 ARM_HWCAP2_ARM_SHA1 = 1 << 2,
351 ARM_HWCAP2_ARM_SHA2 = 1 << 3,
352 ARM_HWCAP2_ARM_CRC32 = 1 << 4,
353 };
354
355 /* The commpage only exists for 32 bit kernels */
356
357 #define TARGET_HAS_VALIDATE_GUEST_SPACE
358 /* Return 1 if the proposed guest space is suitable for the guest.
359 * Return 0 if the proposed guest space isn't suitable, but another
360 * address space should be tried.
361 * Return -1 if there is no way the proposed guest space can be
362 * valid regardless of the base.
363 * The guest code may leave a page mapped and populate it if the
364 * address is suitable.
365 */
366 static int validate_guest_space(unsigned long guest_base,
367 unsigned long guest_size)
368 {
369 unsigned long real_start, test_page_addr;
370
371 /* We need to check that we can force a fault on access to the
372 * commpage at 0xffff0fxx
373 */
374 test_page_addr = guest_base + (0xffff0f00 & qemu_host_page_mask);
375
376 /* If the commpage lies within the already allocated guest space,
377 * then there is no way we can allocate it.
378 */
379 if (test_page_addr >= guest_base
380 && test_page_addr < (guest_base + guest_size)) {
381 return -1;
382 }
383
384 /* Note it needs to be writeable to let us initialise it */
385 real_start = (unsigned long)
386 mmap((void *)test_page_addr, qemu_host_page_size,
387 PROT_READ | PROT_WRITE,
388 MAP_ANONYMOUS | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
389
390 /* If we can't map it then try another address */
391 if (real_start == -1ul) {
392 return 0;
393 }
394
395 if (real_start != test_page_addr) {
396 /* OS didn't put the page where we asked - unmap and reject */
397 munmap((void *)real_start, qemu_host_page_size);
398 return 0;
399 }
400
401 /* Leave the page mapped
402 * Populate it (mmap should have left it all 0'd)
403 */
404
405 /* Kernel helper versions */
406 __put_user(5, (uint32_t *)g2h(0xffff0ffcul));
407
408 /* Now it's populated make it RO */
409 if (mprotect((void *)test_page_addr, qemu_host_page_size, PROT_READ)) {
410 perror("Protecting guest commpage");
411 exit(-1);
412 }
413
414 return 1; /* All good */
415 }
416
417 #define ELF_HWCAP get_elf_hwcap()
418 #define ELF_HWCAP2 get_elf_hwcap2()
419
420 static uint32_t get_elf_hwcap(void)
421 {
422 ARMCPU *cpu = ARM_CPU(thread_cpu);
423 uint32_t hwcaps = 0;
424
425 hwcaps |= ARM_HWCAP_ARM_SWP;
426 hwcaps |= ARM_HWCAP_ARM_HALF;
427 hwcaps |= ARM_HWCAP_ARM_THUMB;
428 hwcaps |= ARM_HWCAP_ARM_FAST_MULT;
429
430 /* probe for the extra features */
431 #define GET_FEATURE(feat, hwcap) \
432 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
433 /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */
434 GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP);
435 GET_FEATURE(ARM_FEATURE_VFP, ARM_HWCAP_ARM_VFP);
436 GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
437 GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
438 GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
439 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPv3);
440 GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS);
441 GET_FEATURE(ARM_FEATURE_VFP4, ARM_HWCAP_ARM_VFPv4);
442 GET_FEATURE(ARM_FEATURE_ARM_DIV, ARM_HWCAP_ARM_IDIVA);
443 GET_FEATURE(ARM_FEATURE_THUMB_DIV, ARM_HWCAP_ARM_IDIVT);
444 /* All QEMU's VFPv3 CPUs have 32 registers, see VFP_DREG in translate.c.
445 * Note that the ARM_HWCAP_ARM_VFPv3D16 bit is always the inverse of
446 * ARM_HWCAP_ARM_VFPD32 (and so always clear for QEMU); it is unrelated
447 * to our VFP_FP16 feature bit.
448 */
449 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPD32);
450 GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE);
451
452 return hwcaps;
453 }
454
455 static uint32_t get_elf_hwcap2(void)
456 {
457 ARMCPU *cpu = ARM_CPU(thread_cpu);
458 uint32_t hwcaps = 0;
459
460 GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP2_ARM_AES);
461 GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP2_ARM_PMULL);
462 GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP2_ARM_SHA1);
463 GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP2_ARM_SHA2);
464 GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP2_ARM_CRC32);
465 return hwcaps;
466 }
467
468 #undef GET_FEATURE
469
470 #else
471 /* 64 bit ARM definitions */
472 #define ELF_START_MMAP 0x80000000
473
474 #define ELF_ARCH EM_AARCH64
475 #define ELF_CLASS ELFCLASS64
476 #define ELF_PLATFORM "aarch64"
477
478 static inline void init_thread(struct target_pt_regs *regs,
479 struct image_info *infop)
480 {
481 abi_long stack = infop->start_stack;
482 memset(regs, 0, sizeof(*regs));
483
484 regs->pc = infop->entry & ~0x3ULL;
485 regs->sp = stack;
486 }
487
488 #define ELF_NREG 34
489 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
490
491 static void elf_core_copy_regs(target_elf_gregset_t *regs,
492 const CPUARMState *env)
493 {
494 int i;
495
496 for (i = 0; i < 32; i++) {
497 (*regs)[i] = tswapreg(env->xregs[i]);
498 }
499 (*regs)[32] = tswapreg(env->pc);
500 (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env));
501 }
502
503 #define USE_ELF_CORE_DUMP
504 #define ELF_EXEC_PAGESIZE 4096
505
506 enum {
507 ARM_HWCAP_A64_FP = 1 << 0,
508 ARM_HWCAP_A64_ASIMD = 1 << 1,
509 ARM_HWCAP_A64_EVTSTRM = 1 << 2,
510 ARM_HWCAP_A64_AES = 1 << 3,
511 ARM_HWCAP_A64_PMULL = 1 << 4,
512 ARM_HWCAP_A64_SHA1 = 1 << 5,
513 ARM_HWCAP_A64_SHA2 = 1 << 6,
514 ARM_HWCAP_A64_CRC32 = 1 << 7,
515 };
516
517 #define ELF_HWCAP get_elf_hwcap()
518
519 static uint32_t get_elf_hwcap(void)
520 {
521 ARMCPU *cpu = ARM_CPU(thread_cpu);
522 uint32_t hwcaps = 0;
523
524 hwcaps |= ARM_HWCAP_A64_FP;
525 hwcaps |= ARM_HWCAP_A64_ASIMD;
526
527 /* probe for the extra features */
528 #define GET_FEATURE(feat, hwcap) \
529 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
530 GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP_A64_AES);
531 GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP_A64_PMULL);
532 GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP_A64_SHA1);
533 GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP_A64_SHA2);
534 GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP_A64_CRC32);
535 #undef GET_FEATURE
536
537 return hwcaps;
538 }
539
540 #endif /* not TARGET_AARCH64 */
541 #endif /* TARGET_ARM */
542
543 #ifdef TARGET_UNICORE32
544
545 #define ELF_START_MMAP 0x80000000
546
547 #define ELF_CLASS ELFCLASS32
548 #define ELF_DATA ELFDATA2LSB
549 #define ELF_ARCH EM_UNICORE32
550
551 static inline void init_thread(struct target_pt_regs *regs,
552 struct image_info *infop)
553 {
554 abi_long stack = infop->start_stack;
555 memset(regs, 0, sizeof(*regs));
556 regs->UC32_REG_asr = 0x10;
557 regs->UC32_REG_pc = infop->entry & 0xfffffffe;
558 regs->UC32_REG_sp = infop->start_stack;
559 /* FIXME - what to for failure of get_user()? */
560 get_user_ual(regs->UC32_REG_02, stack + 8); /* envp */
561 get_user_ual(regs->UC32_REG_01, stack + 4); /* envp */
562 /* XXX: it seems that r0 is zeroed after ! */
563 regs->UC32_REG_00 = 0;
564 }
565
566 #define ELF_NREG 34
567 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
568
569 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUUniCore32State *env)
570 {
571 (*regs)[0] = env->regs[0];
572 (*regs)[1] = env->regs[1];
573 (*regs)[2] = env->regs[2];
574 (*regs)[3] = env->regs[3];
575 (*regs)[4] = env->regs[4];
576 (*regs)[5] = env->regs[5];
577 (*regs)[6] = env->regs[6];
578 (*regs)[7] = env->regs[7];
579 (*regs)[8] = env->regs[8];
580 (*regs)[9] = env->regs[9];
581 (*regs)[10] = env->regs[10];
582 (*regs)[11] = env->regs[11];
583 (*regs)[12] = env->regs[12];
584 (*regs)[13] = env->regs[13];
585 (*regs)[14] = env->regs[14];
586 (*regs)[15] = env->regs[15];
587 (*regs)[16] = env->regs[16];
588 (*regs)[17] = env->regs[17];
589 (*regs)[18] = env->regs[18];
590 (*regs)[19] = env->regs[19];
591 (*regs)[20] = env->regs[20];
592 (*regs)[21] = env->regs[21];
593 (*regs)[22] = env->regs[22];
594 (*regs)[23] = env->regs[23];
595 (*regs)[24] = env->regs[24];
596 (*regs)[25] = env->regs[25];
597 (*regs)[26] = env->regs[26];
598 (*regs)[27] = env->regs[27];
599 (*regs)[28] = env->regs[28];
600 (*regs)[29] = env->regs[29];
601 (*regs)[30] = env->regs[30];
602 (*regs)[31] = env->regs[31];
603
604 (*regs)[32] = cpu_asr_read((CPUUniCore32State *)env);
605 (*regs)[33] = env->regs[0]; /* XXX */
606 }
607
608 #define USE_ELF_CORE_DUMP
609 #define ELF_EXEC_PAGESIZE 4096
610
611 #define ELF_HWCAP (UC32_HWCAP_CMOV | UC32_HWCAP_UCF64)
612
613 #endif
614
615 #ifdef TARGET_SPARC
616 #ifdef TARGET_SPARC64
617
618 #define ELF_START_MMAP 0x80000000
619 #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
620 | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
621 #ifndef TARGET_ABI32
622 #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
623 #else
624 #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
625 #endif
626
627 #define ELF_CLASS ELFCLASS64
628 #define ELF_ARCH EM_SPARCV9
629
630 #define STACK_BIAS 2047
631
632 static inline void init_thread(struct target_pt_regs *regs,
633 struct image_info *infop)
634 {
635 #ifndef TARGET_ABI32
636 regs->tstate = 0;
637 #endif
638 regs->pc = infop->entry;
639 regs->npc = regs->pc + 4;
640 regs->y = 0;
641 #ifdef TARGET_ABI32
642 regs->u_regs[14] = infop->start_stack - 16 * 4;
643 #else
644 if (personality(infop->personality) == PER_LINUX32)
645 regs->u_regs[14] = infop->start_stack - 16 * 4;
646 else
647 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
648 #endif
649 }
650
651 #else
652 #define ELF_START_MMAP 0x80000000
653 #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
654 | HWCAP_SPARC_MULDIV)
655
656 #define ELF_CLASS ELFCLASS32
657 #define ELF_ARCH EM_SPARC
658
659 static inline void init_thread(struct target_pt_regs *regs,
660 struct image_info *infop)
661 {
662 regs->psr = 0;
663 regs->pc = infop->entry;
664 regs->npc = regs->pc + 4;
665 regs->y = 0;
666 regs->u_regs[14] = infop->start_stack - 16 * 4;
667 }
668
669 #endif
670 #endif
671
672 #ifdef TARGET_PPC
673
674 #define ELF_MACHINE PPC_ELF_MACHINE
675 #define ELF_START_MMAP 0x80000000
676
677 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
678
679 #define elf_check_arch(x) ( (x) == EM_PPC64 )
680
681 #define ELF_CLASS ELFCLASS64
682
683 #else
684
685 #define ELF_CLASS ELFCLASS32
686
687 #endif
688
689 #define ELF_ARCH EM_PPC
690
691 /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
692 See arch/powerpc/include/asm/cputable.h. */
693 enum {
694 QEMU_PPC_FEATURE_32 = 0x80000000,
695 QEMU_PPC_FEATURE_64 = 0x40000000,
696 QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
697 QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
698 QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
699 QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
700 QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
701 QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
702 QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
703 QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
704 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
705 QEMU_PPC_FEATURE_NO_TB = 0x00100000,
706 QEMU_PPC_FEATURE_POWER4 = 0x00080000,
707 QEMU_PPC_FEATURE_POWER5 = 0x00040000,
708 QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
709 QEMU_PPC_FEATURE_CELL = 0x00010000,
710 QEMU_PPC_FEATURE_BOOKE = 0x00008000,
711 QEMU_PPC_FEATURE_SMT = 0x00004000,
712 QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
713 QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
714 QEMU_PPC_FEATURE_PA6T = 0x00000800,
715 QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
716 QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
717 QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
718 QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
719 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
720
721 QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
722 QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
723
724 /* Feature definitions in AT_HWCAP2. */
725 QEMU_PPC_FEATURE2_ARCH_2_07 = 0x80000000, /* ISA 2.07 */
726 QEMU_PPC_FEATURE2_HAS_HTM = 0x40000000, /* Hardware Transactional Memory */
727 QEMU_PPC_FEATURE2_HAS_DSCR = 0x20000000, /* Data Stream Control Register */
728 QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */
729 QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */
730 QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */
731 };
732
733 #define ELF_HWCAP get_elf_hwcap()
734
735 static uint32_t get_elf_hwcap(void)
736 {
737 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
738 uint32_t features = 0;
739
740 /* We don't have to be terribly complete here; the high points are
741 Altivec/FP/SPE support. Anything else is just a bonus. */
742 #define GET_FEATURE(flag, feature) \
743 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
744 #define GET_FEATURE2(flags, feature) \
745 do { \
746 if ((cpu->env.insns_flags2 & flags) == flags) { \
747 features |= feature; \
748 } \
749 } while (0)
750 GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
751 GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
752 GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
753 GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
754 GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
755 GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
756 GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
757 GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
758 GET_FEATURE2(PPC2_DFP, QEMU_PPC_FEATURE_HAS_DFP);
759 GET_FEATURE2(PPC2_VSX, QEMU_PPC_FEATURE_HAS_VSX);
760 GET_FEATURE2((PPC2_PERM_ISA206 | PPC2_DIVE_ISA206 | PPC2_ATOMIC_ISA206 |
761 PPC2_FP_CVT_ISA206 | PPC2_FP_TST_ISA206),
762 QEMU_PPC_FEATURE_ARCH_2_06);
763 #undef GET_FEATURE
764 #undef GET_FEATURE2
765
766 return features;
767 }
768
769 #define ELF_HWCAP2 get_elf_hwcap2()
770
771 static uint32_t get_elf_hwcap2(void)
772 {
773 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
774 uint32_t features = 0;
775
776 #define GET_FEATURE(flag, feature) \
777 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
778 #define GET_FEATURE2(flag, feature) \
779 do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
780
781 GET_FEATURE(PPC_ISEL, QEMU_PPC_FEATURE2_HAS_ISEL);
782 GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR);
783 GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 |
784 PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07);
785
786 #undef GET_FEATURE
787 #undef GET_FEATURE2
788
789 return features;
790 }
791
792 /*
793 * The requirements here are:
794 * - keep the final alignment of sp (sp & 0xf)
795 * - make sure the 32-bit value at the first 16 byte aligned position of
796 * AUXV is greater than 16 for glibc compatibility.
797 * AT_IGNOREPPC is used for that.
798 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
799 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
800 */
801 #define DLINFO_ARCH_ITEMS 5
802 #define ARCH_DLINFO \
803 do { \
804 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \
805 /* \
806 * Handle glibc compatibility: these magic entries must \
807 * be at the lowest addresses in the final auxv. \
808 */ \
809 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
810 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
811 NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \
812 NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \
813 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
814 } while (0)
815
816 static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
817 {
818 _regs->gpr[1] = infop->start_stack;
819 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
820 if (get_ppc64_abi(infop) < 2) {
821 uint64_t val;
822 get_user_u64(val, infop->entry + 8);
823 _regs->gpr[2] = val + infop->load_bias;
824 get_user_u64(val, infop->entry);
825 infop->entry = val + infop->load_bias;
826 } else {
827 _regs->gpr[12] = infop->entry; /* r12 set to global entry address */
828 }
829 #endif
830 _regs->nip = infop->entry;
831 }
832
833 /* See linux kernel: arch/powerpc/include/asm/elf.h. */
834 #define ELF_NREG 48
835 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
836
837 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env)
838 {
839 int i;
840 target_ulong ccr = 0;
841
842 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
843 (*regs)[i] = tswapreg(env->gpr[i]);
844 }
845
846 (*regs)[32] = tswapreg(env->nip);
847 (*regs)[33] = tswapreg(env->msr);
848 (*regs)[35] = tswapreg(env->ctr);
849 (*regs)[36] = tswapreg(env->lr);
850 (*regs)[37] = tswapreg(env->xer);
851
852 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
853 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
854 }
855 (*regs)[38] = tswapreg(ccr);
856 }
857
858 #define USE_ELF_CORE_DUMP
859 #define ELF_EXEC_PAGESIZE 4096
860
861 #endif
862
863 #ifdef TARGET_MIPS
864
865 #define ELF_START_MMAP 0x80000000
866
867 #ifdef TARGET_MIPS64
868 #define ELF_CLASS ELFCLASS64
869 #else
870 #define ELF_CLASS ELFCLASS32
871 #endif
872 #define ELF_ARCH EM_MIPS
873
874 static inline void init_thread(struct target_pt_regs *regs,
875 struct image_info *infop)
876 {
877 regs->cp0_status = 2 << CP0St_KSU;
878 regs->cp0_epc = infop->entry;
879 regs->regs[29] = infop->start_stack;
880 }
881
882 /* See linux kernel: arch/mips/include/asm/elf.h. */
883 #define ELF_NREG 45
884 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
885
886 /* See linux kernel: arch/mips/include/asm/reg.h. */
887 enum {
888 #ifdef TARGET_MIPS64
889 TARGET_EF_R0 = 0,
890 #else
891 TARGET_EF_R0 = 6,
892 #endif
893 TARGET_EF_R26 = TARGET_EF_R0 + 26,
894 TARGET_EF_R27 = TARGET_EF_R0 + 27,
895 TARGET_EF_LO = TARGET_EF_R0 + 32,
896 TARGET_EF_HI = TARGET_EF_R0 + 33,
897 TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
898 TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
899 TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
900 TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
901 };
902
903 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
904 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env)
905 {
906 int i;
907
908 for (i = 0; i < TARGET_EF_R0; i++) {
909 (*regs)[i] = 0;
910 }
911 (*regs)[TARGET_EF_R0] = 0;
912
913 for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
914 (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]);
915 }
916
917 (*regs)[TARGET_EF_R26] = 0;
918 (*regs)[TARGET_EF_R27] = 0;
919 (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]);
920 (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]);
921 (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC);
922 (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr);
923 (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status);
924 (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause);
925 }
926
927 #define USE_ELF_CORE_DUMP
928 #define ELF_EXEC_PAGESIZE 4096
929
930 #endif /* TARGET_MIPS */
931
932 #ifdef TARGET_MICROBLAZE
933
934 #define ELF_START_MMAP 0x80000000
935
936 #define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
937
938 #define ELF_CLASS ELFCLASS32
939 #define ELF_ARCH EM_MICROBLAZE
940
941 static inline void init_thread(struct target_pt_regs *regs,
942 struct image_info *infop)
943 {
944 regs->pc = infop->entry;
945 regs->r1 = infop->start_stack;
946
947 }
948
949 #define ELF_EXEC_PAGESIZE 4096
950
951 #define USE_ELF_CORE_DUMP
952 #define ELF_NREG 38
953 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
954
955 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
956 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env)
957 {
958 int i, pos = 0;
959
960 for (i = 0; i < 32; i++) {
961 (*regs)[pos++] = tswapreg(env->regs[i]);
962 }
963
964 for (i = 0; i < 6; i++) {
965 (*regs)[pos++] = tswapreg(env->sregs[i]);
966 }
967 }
968
969 #endif /* TARGET_MICROBLAZE */
970
971 #ifdef TARGET_NIOS2
972
973 #define ELF_START_MMAP 0x80000000
974
975 #define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
976
977 #define ELF_CLASS ELFCLASS32
978 #define ELF_ARCH EM_ALTERA_NIOS2
979
980 static void init_thread(struct target_pt_regs *regs, struct image_info *infop)
981 {
982 regs->ea = infop->entry;
983 regs->sp = infop->start_stack;
984 regs->estatus = 0x3;
985 }
986
987 #define ELF_EXEC_PAGESIZE 4096
988
989 #define USE_ELF_CORE_DUMP
990 #define ELF_NREG 49
991 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
992
993 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
994 static void elf_core_copy_regs(target_elf_gregset_t *regs,
995 const CPUNios2State *env)
996 {
997 int i;
998
999 (*regs)[0] = -1;
1000 for (i = 1; i < 8; i++) /* r0-r7 */
1001 (*regs)[i] = tswapreg(env->regs[i + 7]);
1002
1003 for (i = 8; i < 16; i++) /* r8-r15 */
1004 (*regs)[i] = tswapreg(env->regs[i - 8]);
1005
1006 for (i = 16; i < 24; i++) /* r16-r23 */
1007 (*regs)[i] = tswapreg(env->regs[i + 7]);
1008 (*regs)[24] = -1; /* R_ET */
1009 (*regs)[25] = -1; /* R_BT */
1010 (*regs)[26] = tswapreg(env->regs[R_GP]);
1011 (*regs)[27] = tswapreg(env->regs[R_SP]);
1012 (*regs)[28] = tswapreg(env->regs[R_FP]);
1013 (*regs)[29] = tswapreg(env->regs[R_EA]);
1014 (*regs)[30] = -1; /* R_SSTATUS */
1015 (*regs)[31] = tswapreg(env->regs[R_RA]);
1016
1017 (*regs)[32] = tswapreg(env->regs[R_PC]);
1018
1019 (*regs)[33] = -1; /* R_STATUS */
1020 (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]);
1021
1022 for (i = 35; i < 49; i++) /* ... */
1023 (*regs)[i] = -1;
1024 }
1025
1026 #endif /* TARGET_NIOS2 */
1027
1028 #ifdef TARGET_OPENRISC
1029
1030 #define ELF_START_MMAP 0x08000000
1031
1032 #define ELF_ARCH EM_OPENRISC
1033 #define ELF_CLASS ELFCLASS32
1034 #define ELF_DATA ELFDATA2MSB
1035
1036 static inline void init_thread(struct target_pt_regs *regs,
1037 struct image_info *infop)
1038 {
1039 regs->pc = infop->entry;
1040 regs->gpr[1] = infop->start_stack;
1041 }
1042
1043 #define USE_ELF_CORE_DUMP
1044 #define ELF_EXEC_PAGESIZE 8192
1045
1046 /* See linux kernel arch/openrisc/include/asm/elf.h. */
1047 #define ELF_NREG 34 /* gprs and pc, sr */
1048 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1049
1050 static void elf_core_copy_regs(target_elf_gregset_t *regs,
1051 const CPUOpenRISCState *env)
1052 {
1053 int i;
1054
1055 for (i = 0; i < 32; i++) {
1056 (*regs)[i] = tswapreg(cpu_get_gpr(env, i));
1057 }
1058 (*regs)[32] = tswapreg(env->pc);
1059 (*regs)[33] = tswapreg(cpu_get_sr(env));
1060 }
1061 #define ELF_HWCAP 0
1062 #define ELF_PLATFORM NULL
1063
1064 #endif /* TARGET_OPENRISC */
1065
1066 #ifdef TARGET_SH4
1067
1068 #define ELF_START_MMAP 0x80000000
1069
1070 #define ELF_CLASS ELFCLASS32
1071 #define ELF_ARCH EM_SH
1072
1073 static inline void init_thread(struct target_pt_regs *regs,
1074 struct image_info *infop)
1075 {
1076 /* Check other registers XXXXX */
1077 regs->pc = infop->entry;
1078 regs->regs[15] = infop->start_stack;
1079 }
1080
1081 /* See linux kernel: arch/sh/include/asm/elf.h. */
1082 #define ELF_NREG 23
1083 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1084
1085 /* See linux kernel: arch/sh/include/asm/ptrace.h. */
1086 enum {
1087 TARGET_REG_PC = 16,
1088 TARGET_REG_PR = 17,
1089 TARGET_REG_SR = 18,
1090 TARGET_REG_GBR = 19,
1091 TARGET_REG_MACH = 20,
1092 TARGET_REG_MACL = 21,
1093 TARGET_REG_SYSCALL = 22
1094 };
1095
1096 static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
1097 const CPUSH4State *env)
1098 {
1099 int i;
1100
1101 for (i = 0; i < 16; i++) {
1102 (*regs)[i] = tswapreg(env->gregs[i]);
1103 }
1104
1105 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1106 (*regs)[TARGET_REG_PR] = tswapreg(env->pr);
1107 (*regs)[TARGET_REG_SR] = tswapreg(env->sr);
1108 (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr);
1109 (*regs)[TARGET_REG_MACH] = tswapreg(env->mach);
1110 (*regs)[TARGET_REG_MACL] = tswapreg(env->macl);
1111 (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
1112 }
1113
1114 #define USE_ELF_CORE_DUMP
1115 #define ELF_EXEC_PAGESIZE 4096
1116
1117 enum {
1118 SH_CPU_HAS_FPU = 0x0001, /* Hardware FPU support */
1119 SH_CPU_HAS_P2_FLUSH_BUG = 0x0002, /* Need to flush the cache in P2 area */
1120 SH_CPU_HAS_MMU_PAGE_ASSOC = 0x0004, /* SH3: TLB way selection bit support */
1121 SH_CPU_HAS_DSP = 0x0008, /* SH-DSP: DSP support */
1122 SH_CPU_HAS_PERF_COUNTER = 0x0010, /* Hardware performance counters */
1123 SH_CPU_HAS_PTEA = 0x0020, /* PTEA register */
1124 SH_CPU_HAS_LLSC = 0x0040, /* movli.l/movco.l */
1125 SH_CPU_HAS_L2_CACHE = 0x0080, /* Secondary cache / URAM */
1126 SH_CPU_HAS_OP32 = 0x0100, /* 32-bit instruction support */
1127 SH_CPU_HAS_PTEAEX = 0x0200, /* PTE ASID Extension support */
1128 };
1129
1130 #define ELF_HWCAP get_elf_hwcap()
1131
1132 static uint32_t get_elf_hwcap(void)
1133 {
1134 SuperHCPU *cpu = SUPERH_CPU(thread_cpu);
1135 uint32_t hwcap = 0;
1136
1137 hwcap |= SH_CPU_HAS_FPU;
1138
1139 if (cpu->env.features & SH_FEATURE_SH4A) {
1140 hwcap |= SH_CPU_HAS_LLSC;
1141 }
1142
1143 return hwcap;
1144 }
1145
1146 #endif
1147
1148 #ifdef TARGET_CRIS
1149
1150 #define ELF_START_MMAP 0x80000000
1151
1152 #define ELF_CLASS ELFCLASS32
1153 #define ELF_ARCH EM_CRIS
1154
1155 static inline void init_thread(struct target_pt_regs *regs,
1156 struct image_info *infop)
1157 {
1158 regs->erp = infop->entry;
1159 }
1160
1161 #define ELF_EXEC_PAGESIZE 8192
1162
1163 #endif
1164
1165 #ifdef TARGET_M68K
1166
1167 #define ELF_START_MMAP 0x80000000
1168
1169 #define ELF_CLASS ELFCLASS32
1170 #define ELF_ARCH EM_68K
1171
1172 /* ??? Does this need to do anything?
1173 #define ELF_PLAT_INIT(_r) */
1174
1175 static inline void init_thread(struct target_pt_regs *regs,
1176 struct image_info *infop)
1177 {
1178 regs->usp = infop->start_stack;
1179 regs->sr = 0;
1180 regs->pc = infop->entry;
1181 }
1182
1183 /* See linux kernel: arch/m68k/include/asm/elf.h. */
1184 #define ELF_NREG 20
1185 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1186
1187 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env)
1188 {
1189 (*regs)[0] = tswapreg(env->dregs[1]);
1190 (*regs)[1] = tswapreg(env->dregs[2]);
1191 (*regs)[2] = tswapreg(env->dregs[3]);
1192 (*regs)[3] = tswapreg(env->dregs[4]);
1193 (*regs)[4] = tswapreg(env->dregs[5]);
1194 (*regs)[5] = tswapreg(env->dregs[6]);
1195 (*regs)[6] = tswapreg(env->dregs[7]);
1196 (*regs)[7] = tswapreg(env->aregs[0]);
1197 (*regs)[8] = tswapreg(env->aregs[1]);
1198 (*regs)[9] = tswapreg(env->aregs[2]);
1199 (*regs)[10] = tswapreg(env->aregs[3]);
1200 (*regs)[11] = tswapreg(env->aregs[4]);
1201 (*regs)[12] = tswapreg(env->aregs[5]);
1202 (*regs)[13] = tswapreg(env->aregs[6]);
1203 (*regs)[14] = tswapreg(env->dregs[0]);
1204 (*regs)[15] = tswapreg(env->aregs[7]);
1205 (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */
1206 (*regs)[17] = tswapreg(env->sr);
1207 (*regs)[18] = tswapreg(env->pc);
1208 (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
1209 }
1210
1211 #define USE_ELF_CORE_DUMP
1212 #define ELF_EXEC_PAGESIZE 8192
1213
1214 #endif
1215
1216 #ifdef TARGET_ALPHA
1217
1218 #define ELF_START_MMAP (0x30000000000ULL)
1219
1220 #define ELF_CLASS ELFCLASS64
1221 #define ELF_ARCH EM_ALPHA
1222
1223 static inline void init_thread(struct target_pt_regs *regs,
1224 struct image_info *infop)
1225 {
1226 regs->pc = infop->entry;
1227 regs->ps = 8;
1228 regs->usp = infop->start_stack;
1229 }
1230
1231 #define ELF_EXEC_PAGESIZE 8192
1232
1233 #endif /* TARGET_ALPHA */
1234
1235 #ifdef TARGET_S390X
1236
1237 #define ELF_START_MMAP (0x20000000000ULL)
1238
1239 #define ELF_CLASS ELFCLASS64
1240 #define ELF_DATA ELFDATA2MSB
1241 #define ELF_ARCH EM_S390
1242
1243 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1244 {
1245 regs->psw.addr = infop->entry;
1246 regs->psw.mask = PSW_MASK_64 | PSW_MASK_32;
1247 regs->gprs[15] = infop->start_stack;
1248 }
1249
1250 #endif /* TARGET_S390X */
1251
1252 #ifdef TARGET_TILEGX
1253
1254 /* 42 bits real used address, a half for user mode */
1255 #define ELF_START_MMAP (0x00000020000000000ULL)
1256
1257 #define elf_check_arch(x) ((x) == EM_TILEGX)
1258
1259 #define ELF_CLASS ELFCLASS64
1260 #define ELF_DATA ELFDATA2LSB
1261 #define ELF_ARCH EM_TILEGX
1262
1263 static inline void init_thread(struct target_pt_regs *regs,
1264 struct image_info *infop)
1265 {
1266 regs->pc = infop->entry;
1267 regs->sp = infop->start_stack;
1268
1269 }
1270
1271 #define ELF_EXEC_PAGESIZE 65536 /* TILE-Gx page size is 64KB */
1272
1273 #endif /* TARGET_TILEGX */
1274
1275 #ifdef TARGET_HPPA
1276
1277 #define ELF_START_MMAP 0x80000000
1278 #define ELF_CLASS ELFCLASS32
1279 #define ELF_ARCH EM_PARISC
1280 #define ELF_PLATFORM "PARISC"
1281 #define STACK_GROWS_DOWN 0
1282 #define STACK_ALIGNMENT 64
1283
1284 static inline void init_thread(struct target_pt_regs *regs,
1285 struct image_info *infop)
1286 {
1287 regs->iaoq[0] = infop->entry;
1288 regs->iaoq[1] = infop->entry + 4;
1289 regs->gr[23] = 0;
1290 regs->gr[24] = infop->arg_start;
1291 regs->gr[25] = (infop->arg_end - infop->arg_start) / sizeof(abi_ulong);
1292 /* The top-of-stack contains a linkage buffer. */
1293 regs->gr[30] = infop->start_stack + 64;
1294 regs->gr[31] = infop->entry;
1295 }
1296
1297 #endif /* TARGET_HPPA */
1298
1299 #ifndef ELF_PLATFORM
1300 #define ELF_PLATFORM (NULL)
1301 #endif
1302
1303 #ifndef ELF_MACHINE
1304 #define ELF_MACHINE ELF_ARCH
1305 #endif
1306
1307 #ifndef elf_check_arch
1308 #define elf_check_arch(x) ((x) == ELF_ARCH)
1309 #endif
1310
1311 #ifndef ELF_HWCAP
1312 #define ELF_HWCAP 0
1313 #endif
1314
1315 #ifndef STACK_GROWS_DOWN
1316 #define STACK_GROWS_DOWN 1
1317 #endif
1318
1319 #ifndef STACK_ALIGNMENT
1320 #define STACK_ALIGNMENT 16
1321 #endif
1322
1323 #ifdef TARGET_ABI32
1324 #undef ELF_CLASS
1325 #define ELF_CLASS ELFCLASS32
1326 #undef bswaptls
1327 #define bswaptls(ptr) bswap32s(ptr)
1328 #endif
1329
1330 #include "elf.h"
1331
1332 struct exec
1333 {
1334 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
1335 unsigned int a_text; /* length of text, in bytes */
1336 unsigned int a_data; /* length of data, in bytes */
1337 unsigned int a_bss; /* length of uninitialized data area, in bytes */
1338 unsigned int a_syms; /* length of symbol table data in file, in bytes */
1339 unsigned int a_entry; /* start address */
1340 unsigned int a_trsize; /* length of relocation info for text, in bytes */
1341 unsigned int a_drsize; /* length of relocation info for data, in bytes */
1342 };
1343
1344
1345 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
1346 #define OMAGIC 0407
1347 #define NMAGIC 0410
1348 #define ZMAGIC 0413
1349 #define QMAGIC 0314
1350
1351 /* Necessary parameters */
1352 #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
1353 #define TARGET_ELF_PAGESTART(_v) ((_v) & \
1354 ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1))
1355 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
1356
1357 #define DLINFO_ITEMS 15
1358
1359 static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
1360 {
1361 memcpy(to, from, n);
1362 }
1363
1364 #ifdef BSWAP_NEEDED
1365 static void bswap_ehdr(struct elfhdr *ehdr)
1366 {
1367 bswap16s(&ehdr->e_type); /* Object file type */
1368 bswap16s(&ehdr->e_machine); /* Architecture */
1369 bswap32s(&ehdr->e_version); /* Object file version */
1370 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
1371 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
1372 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
1373 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
1374 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
1375 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
1376 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
1377 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
1378 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
1379 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
1380 }
1381
1382 static void bswap_phdr(struct elf_phdr *phdr, int phnum)
1383 {
1384 int i;
1385 for (i = 0; i < phnum; ++i, ++phdr) {
1386 bswap32s(&phdr->p_type); /* Segment type */
1387 bswap32s(&phdr->p_flags); /* Segment flags */
1388 bswaptls(&phdr->p_offset); /* Segment file offset */
1389 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
1390 bswaptls(&phdr->p_paddr); /* Segment physical address */
1391 bswaptls(&phdr->p_filesz); /* Segment size in file */
1392 bswaptls(&phdr->p_memsz); /* Segment size in memory */
1393 bswaptls(&phdr->p_align); /* Segment alignment */
1394 }
1395 }
1396
1397 static void bswap_shdr(struct elf_shdr *shdr, int shnum)
1398 {
1399 int i;
1400 for (i = 0; i < shnum; ++i, ++shdr) {
1401 bswap32s(&shdr->sh_name);
1402 bswap32s(&shdr->sh_type);
1403 bswaptls(&shdr->sh_flags);
1404 bswaptls(&shdr->sh_addr);
1405 bswaptls(&shdr->sh_offset);
1406 bswaptls(&shdr->sh_size);
1407 bswap32s(&shdr->sh_link);
1408 bswap32s(&shdr->sh_info);
1409 bswaptls(&shdr->sh_addralign);
1410 bswaptls(&shdr->sh_entsize);
1411 }
1412 }
1413
1414 static void bswap_sym(struct elf_sym *sym)
1415 {
1416 bswap32s(&sym->st_name);
1417 bswaptls(&sym->st_value);
1418 bswaptls(&sym->st_size);
1419 bswap16s(&sym->st_shndx);
1420 }
1421 #else
1422 static inline void bswap_ehdr(struct elfhdr *ehdr) { }
1423 static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
1424 static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
1425 static inline void bswap_sym(struct elf_sym *sym) { }
1426 #endif
1427
1428 #ifdef USE_ELF_CORE_DUMP
1429 static int elf_core_dump(int, const CPUArchState *);
1430 #endif /* USE_ELF_CORE_DUMP */
1431 static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
1432
1433 /* Verify the portions of EHDR within E_IDENT for the target.
1434 This can be performed before bswapping the entire header. */
1435 static bool elf_check_ident(struct elfhdr *ehdr)
1436 {
1437 return (ehdr->e_ident[EI_MAG0] == ELFMAG0
1438 && ehdr->e_ident[EI_MAG1] == ELFMAG1
1439 && ehdr->e_ident[EI_MAG2] == ELFMAG2
1440 && ehdr->e_ident[EI_MAG3] == ELFMAG3
1441 && ehdr->e_ident[EI_CLASS] == ELF_CLASS
1442 && ehdr->e_ident[EI_DATA] == ELF_DATA
1443 && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
1444 }
1445
1446 /* Verify the portions of EHDR outside of E_IDENT for the target.
1447 This has to wait until after bswapping the header. */
1448 static bool elf_check_ehdr(struct elfhdr *ehdr)
1449 {
1450 return (elf_check_arch(ehdr->e_machine)
1451 && ehdr->e_ehsize == sizeof(struct elfhdr)
1452 && ehdr->e_phentsize == sizeof(struct elf_phdr)
1453 && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
1454 }
1455
1456 /*
1457 * 'copy_elf_strings()' copies argument/envelope strings from user
1458 * memory to free pages in kernel mem. These are in a format ready
1459 * to be put directly into the top of new user memory.
1460 *
1461 */
1462 static abi_ulong copy_elf_strings(int argc, char **argv, char *scratch,
1463 abi_ulong p, abi_ulong stack_limit)
1464 {
1465 char *tmp;
1466 int len, i;
1467 abi_ulong top = p;
1468
1469 if (!p) {
1470 return 0; /* bullet-proofing */
1471 }
1472
1473 if (STACK_GROWS_DOWN) {
1474 int offset = ((p - 1) % TARGET_PAGE_SIZE) + 1;
1475 for (i = argc - 1; i >= 0; --i) {
1476 tmp = argv[i];
1477 if (!tmp) {
1478 fprintf(stderr, "VFS: argc is wrong");
1479 exit(-1);
1480 }
1481 len = strlen(tmp) + 1;
1482 tmp += len;
1483
1484 if (len > (p - stack_limit)) {
1485 return 0;
1486 }
1487 while (len) {
1488 int bytes_to_copy = (len > offset) ? offset : len;
1489 tmp -= bytes_to_copy;
1490 p -= bytes_to_copy;
1491 offset -= bytes_to_copy;
1492 len -= bytes_to_copy;
1493
1494 memcpy_fromfs(scratch + offset, tmp, bytes_to_copy);
1495
1496 if (offset == 0) {
1497 memcpy_to_target(p, scratch, top - p);
1498 top = p;
1499 offset = TARGET_PAGE_SIZE;
1500 }
1501 }
1502 }
1503 if (p != top) {
1504 memcpy_to_target(p, scratch + offset, top - p);
1505 }
1506 } else {
1507 int remaining = TARGET_PAGE_SIZE - (p % TARGET_PAGE_SIZE);
1508 for (i = 0; i < argc; ++i) {
1509 tmp = argv[i];
1510 if (!tmp) {
1511 fprintf(stderr, "VFS: argc is wrong");
1512 exit(-1);
1513 }
1514 len = strlen(tmp) + 1;
1515 if (len > (stack_limit - p)) {
1516 return 0;
1517 }
1518 while (len) {
1519 int bytes_to_copy = (len > remaining) ? remaining : len;
1520
1521 memcpy_fromfs(scratch + (p - top), tmp, bytes_to_copy);
1522
1523 tmp += bytes_to_copy;
1524 remaining -= bytes_to_copy;
1525 p += bytes_to_copy;
1526 len -= bytes_to_copy;
1527
1528 if (remaining == 0) {
1529 memcpy_to_target(top, scratch, p - top);
1530 top = p;
1531 remaining = TARGET_PAGE_SIZE;
1532 }
1533 }
1534 }
1535 if (p != top) {
1536 memcpy_to_target(top, scratch, p - top);
1537 }
1538 }
1539
1540 return p;
1541 }
1542
1543 /* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of
1544 * argument/environment space. Newer kernels (>2.6.33) allow more,
1545 * dependent on stack size, but guarantee at least 32 pages for
1546 * backwards compatibility.
1547 */
1548 #define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE)
1549
1550 static abi_ulong setup_arg_pages(struct linux_binprm *bprm,
1551 struct image_info *info)
1552 {
1553 abi_ulong size, error, guard;
1554
1555 size = guest_stack_size;
1556 if (size < STACK_LOWER_LIMIT) {
1557 size = STACK_LOWER_LIMIT;
1558 }
1559 guard = TARGET_PAGE_SIZE;
1560 if (guard < qemu_real_host_page_size) {
1561 guard = qemu_real_host_page_size;
1562 }
1563
1564 error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
1565 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1566 if (error == -1) {
1567 perror("mmap stack");
1568 exit(-1);
1569 }
1570
1571 /* We reserve one extra page at the top of the stack as guard. */
1572 if (STACK_GROWS_DOWN) {
1573 target_mprotect(error, guard, PROT_NONE);
1574 info->stack_limit = error + guard;
1575 return info->stack_limit + size - sizeof(void *);
1576 } else {
1577 target_mprotect(error + size, guard, PROT_NONE);
1578 info->stack_limit = error + size;
1579 return error;
1580 }
1581 }
1582
1583 /* Map and zero the bss. We need to explicitly zero any fractional pages
1584 after the data section (i.e. bss). */
1585 static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot)
1586 {
1587 uintptr_t host_start, host_map_start, host_end;
1588
1589 last_bss = TARGET_PAGE_ALIGN(last_bss);
1590
1591 /* ??? There is confusion between qemu_real_host_page_size and
1592 qemu_host_page_size here and elsewhere in target_mmap, which
1593 may lead to the end of the data section mapping from the file
1594 not being mapped. At least there was an explicit test and
1595 comment for that here, suggesting that "the file size must
1596 be known". The comment probably pre-dates the introduction
1597 of the fstat system call in target_mmap which does in fact
1598 find out the size. What isn't clear is if the workaround
1599 here is still actually needed. For now, continue with it,
1600 but merge it with the "normal" mmap that would allocate the bss. */
1601
1602 host_start = (uintptr_t) g2h(elf_bss);
1603 host_end = (uintptr_t) g2h(last_bss);
1604 host_map_start = REAL_HOST_PAGE_ALIGN(host_start);
1605
1606 if (host_map_start < host_end) {
1607 void *p = mmap((void *)host_map_start, host_end - host_map_start,
1608 prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1609 if (p == MAP_FAILED) {
1610 perror("cannot mmap brk");
1611 exit(-1);
1612 }
1613 }
1614
1615 /* Ensure that the bss page(s) are valid */
1616 if ((page_get_flags(last_bss-1) & prot) != prot) {
1617 page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot | PAGE_VALID);
1618 }
1619
1620 if (host_start < host_map_start) {
1621 memset((void *)host_start, 0, host_map_start - host_start);
1622 }
1623 }
1624
1625 #ifdef CONFIG_USE_FDPIC
1626 static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp)
1627 {
1628 uint16_t n;
1629 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs;
1630
1631 /* elf32_fdpic_loadseg */
1632 n = info->nsegs;
1633 while (n--) {
1634 sp -= 12;
1635 put_user_u32(loadsegs[n].addr, sp+0);
1636 put_user_u32(loadsegs[n].p_vaddr, sp+4);
1637 put_user_u32(loadsegs[n].p_memsz, sp+8);
1638 }
1639
1640 /* elf32_fdpic_loadmap */
1641 sp -= 4;
1642 put_user_u16(0, sp+0); /* version */
1643 put_user_u16(info->nsegs, sp+2); /* nsegs */
1644
1645 info->personality = PER_LINUX_FDPIC;
1646 info->loadmap_addr = sp;
1647
1648 return sp;
1649 }
1650 #endif
1651
1652 static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
1653 struct elfhdr *exec,
1654 struct image_info *info,
1655 struct image_info *interp_info)
1656 {
1657 abi_ulong sp;
1658 abi_ulong u_argc, u_argv, u_envp, u_auxv;
1659 int size;
1660 int i;
1661 abi_ulong u_rand_bytes;
1662 uint8_t k_rand_bytes[16];
1663 abi_ulong u_platform;
1664 const char *k_platform;
1665 const int n = sizeof(elf_addr_t);
1666
1667 sp = p;
1668
1669 #ifdef CONFIG_USE_FDPIC
1670 /* Needs to be before we load the env/argc/... */
1671 if (elf_is_fdpic(exec)) {
1672 /* Need 4 byte alignment for these structs */
1673 sp &= ~3;
1674 sp = loader_build_fdpic_loadmap(info, sp);
1675 info->other_info = interp_info;
1676 if (interp_info) {
1677 interp_info->other_info = info;
1678 sp = loader_build_fdpic_loadmap(interp_info, sp);
1679 }
1680 }
1681 #endif
1682
1683 u_platform = 0;
1684 k_platform = ELF_PLATFORM;
1685 if (k_platform) {
1686 size_t len = strlen(k_platform) + 1;
1687 if (STACK_GROWS_DOWN) {
1688 sp -= (len + n - 1) & ~(n - 1);
1689 u_platform = sp;
1690 /* FIXME - check return value of memcpy_to_target() for failure */
1691 memcpy_to_target(sp, k_platform, len);
1692 } else {
1693 memcpy_to_target(sp, k_platform, len);
1694 u_platform = sp;
1695 sp += len + 1;
1696 }
1697 }
1698
1699 /* Provide 16 byte alignment for the PRNG, and basic alignment for
1700 * the argv and envp pointers.
1701 */
1702 if (STACK_GROWS_DOWN) {
1703 sp = QEMU_ALIGN_DOWN(sp, 16);
1704 } else {
1705 sp = QEMU_ALIGN_UP(sp, 16);
1706 }
1707
1708 /*
1709 * Generate 16 random bytes for userspace PRNG seeding (not
1710 * cryptically secure but it's not the aim of QEMU).
1711 */
1712 for (i = 0; i < 16; i++) {
1713 k_rand_bytes[i] = rand();
1714 }
1715 if (STACK_GROWS_DOWN) {
1716 sp -= 16;
1717 u_rand_bytes = sp;
1718 /* FIXME - check return value of memcpy_to_target() for failure */
1719 memcpy_to_target(sp, k_rand_bytes, 16);
1720 } else {
1721 memcpy_to_target(sp, k_rand_bytes, 16);
1722 u_rand_bytes = sp;
1723 sp += 16;
1724 }
1725
1726 size = (DLINFO_ITEMS + 1) * 2;
1727 if (k_platform)
1728 size += 2;
1729 #ifdef DLINFO_ARCH_ITEMS
1730 size += DLINFO_ARCH_ITEMS * 2;
1731 #endif
1732 #ifdef ELF_HWCAP2
1733 size += 2;
1734 #endif
1735 info->auxv_len = size * n;
1736
1737 size += envc + argc + 2;
1738 size += 1; /* argc itself */
1739 size *= n;
1740
1741 /* Allocate space and finalize stack alignment for entry now. */
1742 if (STACK_GROWS_DOWN) {
1743 u_argc = QEMU_ALIGN_DOWN(sp - size, STACK_ALIGNMENT);
1744 sp = u_argc;
1745 } else {
1746 u_argc = sp;
1747 sp = QEMU_ALIGN_UP(sp + size, STACK_ALIGNMENT);
1748 }
1749
1750 u_argv = u_argc + n;
1751 u_envp = u_argv + (argc + 1) * n;
1752 u_auxv = u_envp + (envc + 1) * n;
1753 info->saved_auxv = u_auxv;
1754 info->arg_start = u_argv;
1755 info->arg_end = u_argv + argc * n;
1756
1757 /* This is correct because Linux defines
1758 * elf_addr_t as Elf32_Off / Elf64_Off
1759 */
1760 #define NEW_AUX_ENT(id, val) do { \
1761 put_user_ual(id, u_auxv); u_auxv += n; \
1762 put_user_ual(val, u_auxv); u_auxv += n; \
1763 } while(0)
1764
1765 #ifdef ARCH_DLINFO
1766 /*
1767 * ARCH_DLINFO must come first so platform specific code can enforce
1768 * special alignment requirements on the AUXV if necessary (eg. PPC).
1769 */
1770 ARCH_DLINFO;
1771 #endif
1772 /* There must be exactly DLINFO_ITEMS entries here, or the assert
1773 * on info->auxv_len will trigger.
1774 */
1775 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff));
1776 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
1777 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
1778 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(MAX(TARGET_PAGE_SIZE, getpagesize())));
1779 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
1780 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
1781 NEW_AUX_ENT(AT_ENTRY, info->entry);
1782 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
1783 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
1784 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
1785 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
1786 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
1787 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
1788 NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
1789 NEW_AUX_ENT(AT_SECURE, (abi_ulong) qemu_getauxval(AT_SECURE));
1790
1791 #ifdef ELF_HWCAP2
1792 NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2);
1793 #endif
1794
1795 if (u_platform) {
1796 NEW_AUX_ENT(AT_PLATFORM, u_platform);
1797 }
1798 NEW_AUX_ENT (AT_NULL, 0);
1799 #undef NEW_AUX_ENT
1800
1801 /* Check that our initial calculation of the auxv length matches how much
1802 * we actually put into it.
1803 */
1804 assert(info->auxv_len == u_auxv - info->saved_auxv);
1805
1806 put_user_ual(argc, u_argc);
1807
1808 p = info->arg_strings;
1809 for (i = 0; i < argc; ++i) {
1810 put_user_ual(p, u_argv);
1811 u_argv += n;
1812 p += target_strlen(p) + 1;
1813 }
1814 put_user_ual(0, u_argv);
1815
1816 p = info->env_strings;
1817 for (i = 0; i < envc; ++i) {
1818 put_user_ual(p, u_envp);
1819 u_envp += n;
1820 p += target_strlen(p) + 1;
1821 }
1822 put_user_ual(0, u_envp);
1823
1824 return sp;
1825 }
1826
1827 #ifndef TARGET_HAS_VALIDATE_GUEST_SPACE
1828 /* If the guest doesn't have a validation function just agree */
1829 static int validate_guest_space(unsigned long guest_base,
1830 unsigned long guest_size)
1831 {
1832 return 1;
1833 }
1834 #endif
1835
1836 unsigned long init_guest_space(unsigned long host_start,
1837 unsigned long host_size,
1838 unsigned long guest_start,
1839 bool fixed)
1840 {
1841 unsigned long current_start, real_start;
1842 int flags;
1843
1844 assert(host_start || host_size);
1845
1846 /* If just a starting address is given, then just verify that
1847 * address. */
1848 if (host_start && !host_size) {
1849 if (validate_guest_space(host_start, host_size) == 1) {
1850 return host_start;
1851 } else {
1852 return (unsigned long)-1;
1853 }
1854 }
1855
1856 /* Setup the initial flags and start address. */
1857 current_start = host_start & qemu_host_page_mask;
1858 flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
1859 if (fixed) {
1860 flags |= MAP_FIXED;
1861 }
1862
1863 /* Otherwise, a non-zero size region of memory needs to be mapped
1864 * and validated. */
1865 while (1) {
1866 unsigned long real_size = host_size;
1867
1868 /* Do not use mmap_find_vma here because that is limited to the
1869 * guest address space. We are going to make the
1870 * guest address space fit whatever we're given.
1871 */
1872 real_start = (unsigned long)
1873 mmap((void *)current_start, host_size, PROT_NONE, flags, -1, 0);
1874 if (real_start == (unsigned long)-1) {
1875 return (unsigned long)-1;
1876 }
1877
1878 /* Ensure the address is properly aligned. */
1879 if (real_start & ~qemu_host_page_mask) {
1880 munmap((void *)real_start, host_size);
1881 real_size = host_size + qemu_host_page_size;
1882 real_start = (unsigned long)
1883 mmap((void *)real_start, real_size, PROT_NONE, flags, -1, 0);
1884 if (real_start == (unsigned long)-1) {
1885 return (unsigned long)-1;
1886 }
1887 real_start = HOST_PAGE_ALIGN(real_start);
1888 }
1889
1890 /* Check to see if the address is valid. */
1891 if (!host_start || real_start == current_start) {
1892 int valid = validate_guest_space(real_start - guest_start,
1893 real_size);
1894 if (valid == 1) {
1895 break;
1896 } else if (valid == -1) {
1897 return (unsigned long)-1;
1898 }
1899 /* valid == 0, so try again. */
1900 }
1901
1902 /* That address didn't work. Unmap and try a different one.
1903 * The address the host picked because is typically right at
1904 * the top of the host address space and leaves the guest with
1905 * no usable address space. Resort to a linear search. We
1906 * already compensated for mmap_min_addr, so this should not
1907 * happen often. Probably means we got unlucky and host
1908 * address space randomization put a shared library somewhere
1909 * inconvenient.
1910 */
1911 munmap((void *)real_start, host_size);
1912 current_start += qemu_host_page_size;
1913 if (host_start == current_start) {
1914 /* Theoretically possible if host doesn't have any suitably
1915 * aligned areas. Normally the first mmap will fail.
1916 */
1917 return (unsigned long)-1;
1918 }
1919 }
1920
1921 qemu_log_mask(CPU_LOG_PAGE, "Reserved 0x%lx bytes of guest address space\n", host_size);
1922
1923 return real_start;
1924 }
1925
1926 static void probe_guest_base(const char *image_name,
1927 abi_ulong loaddr, abi_ulong hiaddr)
1928 {
1929 /* Probe for a suitable guest base address, if the user has not set
1930 * it explicitly, and set guest_base appropriately.
1931 * In case of error we will print a suitable message and exit.
1932 */
1933 const char *errmsg;
1934 if (!have_guest_base && !reserved_va) {
1935 unsigned long host_start, real_start, host_size;
1936
1937 /* Round addresses to page boundaries. */
1938 loaddr &= qemu_host_page_mask;
1939 hiaddr = HOST_PAGE_ALIGN(hiaddr);
1940
1941 if (loaddr < mmap_min_addr) {
1942 host_start = HOST_PAGE_ALIGN(mmap_min_addr);
1943 } else {
1944 host_start = loaddr;
1945 if (host_start != loaddr) {
1946 errmsg = "Address overflow loading ELF binary";
1947 goto exit_errmsg;
1948 }
1949 }
1950 host_size = hiaddr - loaddr;
1951
1952 /* Setup the initial guest memory space with ranges gleaned from
1953 * the ELF image that is being loaded.
1954 */
1955 real_start = init_guest_space(host_start, host_size, loaddr, false);
1956 if (real_start == (unsigned long)-1) {
1957 errmsg = "Unable to find space for application";
1958 goto exit_errmsg;
1959 }
1960 guest_base = real_start - loaddr;
1961
1962 qemu_log_mask(CPU_LOG_PAGE, "Relocating guest address space from 0x"
1963 TARGET_ABI_FMT_lx " to 0x%lx\n",
1964 loaddr, real_start);
1965 }
1966 return;
1967
1968 exit_errmsg:
1969 fprintf(stderr, "%s: %s\n", image_name, errmsg);
1970 exit(-1);
1971 }
1972
1973
1974 /* Load an ELF image into the address space.
1975
1976 IMAGE_NAME is the filename of the image, to use in error messages.
1977 IMAGE_FD is the open file descriptor for the image.
1978
1979 BPRM_BUF is a copy of the beginning of the file; this of course
1980 contains the elf file header at offset 0. It is assumed that this
1981 buffer is sufficiently aligned to present no problems to the host
1982 in accessing data at aligned offsets within the buffer.
1983
1984 On return: INFO values will be filled in, as necessary or available. */
1985
1986 static void load_elf_image(const char *image_name, int image_fd,
1987 struct image_info *info, char **pinterp_name,
1988 char bprm_buf[BPRM_BUF_SIZE])
1989 {
1990 struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
1991 struct elf_phdr *phdr;
1992 abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
1993 int i, retval;
1994 const char *errmsg;
1995
1996 /* First of all, some simple consistency checks */
1997 errmsg = "Invalid ELF image for this architecture";
1998 if (!elf_check_ident(ehdr)) {
1999 goto exit_errmsg;
2000 }
2001 bswap_ehdr(ehdr);
2002 if (!elf_check_ehdr(ehdr)) {
2003 goto exit_errmsg;
2004 }
2005
2006 i = ehdr->e_phnum * sizeof(struct elf_phdr);
2007 if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
2008 phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
2009 } else {
2010 phdr = (struct elf_phdr *) alloca(i);
2011 retval = pread(image_fd, phdr, i, ehdr->e_phoff);
2012 if (retval != i) {
2013 goto exit_read;
2014 }
2015 }
2016 bswap_phdr(phdr, ehdr->e_phnum);
2017
2018 #ifdef CONFIG_USE_FDPIC
2019 info->nsegs = 0;
2020 info->pt_dynamic_addr = 0;
2021 #endif
2022
2023 mmap_lock();
2024
2025 /* Find the maximum size of the image and allocate an appropriate
2026 amount of memory to handle that. */
2027 loaddr = -1, hiaddr = 0;
2028 for (i = 0; i < ehdr->e_phnum; ++i) {
2029 if (phdr[i].p_type == PT_LOAD) {
2030 abi_ulong a = phdr[i].p_vaddr - phdr[i].p_offset;
2031 if (a < loaddr) {
2032 loaddr = a;
2033 }
2034 a = phdr[i].p_vaddr + phdr[i].p_memsz;
2035 if (a > hiaddr) {
2036 hiaddr = a;
2037 }
2038 #ifdef CONFIG_USE_FDPIC
2039 ++info->nsegs;
2040 #endif
2041 }
2042 }
2043
2044 load_addr = loaddr;
2045 if (ehdr->e_type == ET_DYN) {
2046 /* The image indicates that it can be loaded anywhere. Find a
2047 location that can hold the memory space required. If the
2048 image is pre-linked, LOADDR will be non-zero. Since we do
2049 not supply MAP_FIXED here we'll use that address if and
2050 only if it remains available. */
2051 load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
2052 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
2053 -1, 0);
2054 if (load_addr == -1) {
2055 goto exit_perror;
2056 }
2057 } else if (pinterp_name != NULL) {
2058 /* This is the main executable. Make sure that the low
2059 address does not conflict with MMAP_MIN_ADDR or the
2060 QEMU application itself. */
2061 probe_guest_base(image_name, loaddr, hiaddr);
2062 }
2063 load_bias = load_addr - loaddr;
2064
2065 #ifdef CONFIG_USE_FDPIC
2066 {
2067 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs =
2068 g_malloc(sizeof(*loadsegs) * info->nsegs);
2069
2070 for (i = 0; i < ehdr->e_phnum; ++i) {
2071 switch (phdr[i].p_type) {
2072 case PT_DYNAMIC:
2073 info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias;
2074 break;
2075 case PT_LOAD:
2076 loadsegs->addr = phdr[i].p_vaddr + load_bias;
2077 loadsegs->p_vaddr = phdr[i].p_vaddr;
2078 loadsegs->p_memsz = phdr[i].p_memsz;
2079 ++loadsegs;
2080 break;
2081 }
2082 }
2083 }
2084 #endif
2085
2086 info->load_bias = load_bias;
2087 info->load_addr = load_addr;
2088 info->entry = ehdr->e_entry + load_bias;
2089 info->start_code = -1;
2090 info->end_code = 0;
2091 info->start_data = -1;
2092 info->end_data = 0;
2093 info->brk = 0;
2094 info->elf_flags = ehdr->e_flags;
2095
2096 for (i = 0; i < ehdr->e_phnum; i++) {
2097 struct elf_phdr *eppnt = phdr + i;
2098 if (eppnt->p_type == PT_LOAD) {
2099 abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em;
2100 int elf_prot = 0;
2101
2102 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
2103 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
2104 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
2105
2106 vaddr = load_bias + eppnt->p_vaddr;
2107 vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
2108 vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
2109
2110 error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po,
2111 elf_prot, MAP_PRIVATE | MAP_FIXED,
2112 image_fd, eppnt->p_offset - vaddr_po);
2113 if (error == -1) {
2114 goto exit_perror;
2115 }
2116
2117 vaddr_ef = vaddr + eppnt->p_filesz;
2118 vaddr_em = vaddr + eppnt->p_memsz;
2119
2120 /* If the load segment requests extra zeros (e.g. bss), map it. */
2121 if (vaddr_ef < vaddr_em) {
2122 zero_bss(vaddr_ef, vaddr_em, elf_prot);
2123 }
2124
2125 /* Find the full program boundaries. */
2126 if (elf_prot & PROT_EXEC) {
2127 if (vaddr < info->start_code) {
2128 info->start_code = vaddr;
2129 }
2130 if (vaddr_ef > info->end_code) {
2131 info->end_code = vaddr_ef;
2132 }
2133 }
2134 if (elf_prot & PROT_WRITE) {
2135 if (vaddr < info->start_data) {
2136 info->start_data = vaddr;
2137 }
2138 if (vaddr_ef > info->end_data) {
2139 info->end_data = vaddr_ef;
2140 }
2141 if (vaddr_em > info->brk) {
2142 info->brk = vaddr_em;
2143 }
2144 }
2145 } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
2146 char *interp_name;
2147
2148 if (*pinterp_name) {
2149 errmsg = "Multiple PT_INTERP entries";
2150 goto exit_errmsg;
2151 }
2152 interp_name = malloc(eppnt->p_filesz);
2153 if (!interp_name) {
2154 goto exit_perror;
2155 }
2156
2157 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2158 memcpy(interp_name, bprm_buf + eppnt->p_offset,
2159 eppnt->p_filesz);
2160 } else {
2161 retval = pread(image_fd, interp_name, eppnt->p_filesz,
2162 eppnt->p_offset);
2163 if (retval != eppnt->p_filesz) {
2164 goto exit_perror;
2165 }
2166 }
2167 if (interp_name[eppnt->p_filesz - 1] != 0) {
2168 errmsg = "Invalid PT_INTERP entry";
2169 goto exit_errmsg;
2170 }
2171 *pinterp_name = interp_name;
2172 }
2173 }
2174
2175 if (info->end_data == 0) {
2176 info->start_data = info->end_code;
2177 info->end_data = info->end_code;
2178 info->brk = info->end_code;
2179 }
2180
2181 if (qemu_log_enabled()) {
2182 load_symbols(ehdr, image_fd, load_bias);
2183 }
2184
2185 mmap_unlock();
2186
2187 close(image_fd);
2188 return;
2189
2190 exit_read:
2191 if (retval >= 0) {
2192 errmsg = "Incomplete read of file header";
2193 goto exit_errmsg;
2194 }
2195 exit_perror:
2196 errmsg = strerror(errno);
2197 exit_errmsg:
2198 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2199 exit(-1);
2200 }
2201
2202 static void load_elf_interp(const char *filename, struct image_info *info,
2203 char bprm_buf[BPRM_BUF_SIZE])
2204 {
2205 int fd, retval;
2206
2207 fd = open(path(filename), O_RDONLY);
2208 if (fd < 0) {
2209 goto exit_perror;
2210 }
2211
2212 retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
2213 if (retval < 0) {
2214 goto exit_perror;
2215 }
2216 if (retval < BPRM_BUF_SIZE) {
2217 memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
2218 }
2219
2220 load_elf_image(filename, fd, info, NULL, bprm_buf);
2221 return;
2222
2223 exit_perror:
2224 fprintf(stderr, "%s: %s\n", filename, strerror(errno));
2225 exit(-1);
2226 }
2227
2228 static int symfind(const void *s0, const void *s1)
2229 {
2230 target_ulong addr = *(target_ulong *)s0;
2231 struct elf_sym *sym = (struct elf_sym *)s1;
2232 int result = 0;
2233 if (addr < sym->st_value) {
2234 result = -1;
2235 } else if (addr >= sym->st_value + sym->st_size) {
2236 result = 1;
2237 }
2238 return result;
2239 }
2240
2241 static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
2242 {
2243 #if ELF_CLASS == ELFCLASS32
2244 struct elf_sym *syms = s->disas_symtab.elf32;
2245 #else
2246 struct elf_sym *syms = s->disas_symtab.elf64;
2247 #endif
2248
2249 // binary search
2250 struct elf_sym *sym;
2251
2252 sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind);
2253 if (sym != NULL) {
2254 return s->disas_strtab + sym->st_name;
2255 }
2256
2257 return "";
2258 }
2259
2260 /* FIXME: This should use elf_ops.h */
2261 static int symcmp(const void *s0, const void *s1)
2262 {
2263 struct elf_sym *sym0 = (struct elf_sym *)s0;
2264 struct elf_sym *sym1 = (struct elf_sym *)s1;
2265 return (sym0->st_value < sym1->st_value)
2266 ? -1
2267 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
2268 }
2269
2270 /* Best attempt to load symbols from this ELF object. */
2271 static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
2272 {
2273 int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
2274 uint64_t segsz;
2275 struct elf_shdr *shdr;
2276 char *strings = NULL;
2277 struct syminfo *s = NULL;
2278 struct elf_sym *new_syms, *syms = NULL;
2279
2280 shnum = hdr->e_shnum;
2281 i = shnum * sizeof(struct elf_shdr);
2282 shdr = (struct elf_shdr *)alloca(i);
2283 if (pread(fd, shdr, i, hdr->e_shoff) != i) {
2284 return;
2285 }
2286
2287 bswap_shdr(shdr, shnum);
2288 for (i = 0; i < shnum; ++i) {
2289 if (shdr[i].sh_type == SHT_SYMTAB) {
2290 sym_idx = i;
2291 str_idx = shdr[i].sh_link;
2292 goto found;
2293 }
2294 }
2295
2296 /* There will be no symbol table if the file was stripped. */
2297 return;
2298
2299 found:
2300 /* Now know where the strtab and symtab are. Snarf them. */
2301 s = g_try_new(struct syminfo, 1);
2302 if (!s) {
2303 goto give_up;
2304 }
2305
2306 segsz = shdr[str_idx].sh_size;
2307 s->disas_strtab = strings = g_try_malloc(segsz);
2308 if (!strings ||
2309 pread(fd, strings, segsz, shdr[str_idx].sh_offset) != segsz) {
2310 goto give_up;
2311 }
2312
2313 segsz = shdr[sym_idx].sh_size;
2314 syms = g_try_malloc(segsz);
2315 if (!syms || pread(fd, syms, segsz, shdr[sym_idx].sh_offset) != segsz) {
2316 goto give_up;
2317 }
2318
2319 if (segsz / sizeof(struct elf_sym) > INT_MAX) {
2320 /* Implausibly large symbol table: give up rather than ploughing
2321 * on with the number of symbols calculation overflowing
2322 */
2323 goto give_up;
2324 }
2325 nsyms = segsz / sizeof(struct elf_sym);
2326 for (i = 0; i < nsyms; ) {
2327 bswap_sym(syms + i);
2328 /* Throw away entries which we do not need. */
2329 if (syms[i].st_shndx == SHN_UNDEF
2330 || syms[i].st_shndx >= SHN_LORESERVE
2331 || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
2332 if (i < --nsyms) {
2333 syms[i] = syms[nsyms];
2334 }
2335 } else {
2336 #if defined(TARGET_ARM) || defined (TARGET_MIPS)
2337 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
2338 syms[i].st_value &= ~(target_ulong)1;
2339 #endif
2340 syms[i].st_value += load_bias;
2341 i++;
2342 }
2343 }
2344
2345 /* No "useful" symbol. */
2346 if (nsyms == 0) {
2347 goto give_up;
2348 }
2349
2350 /* Attempt to free the storage associated with the local symbols
2351 that we threw away. Whether or not this has any effect on the
2352 memory allocation depends on the malloc implementation and how
2353 many symbols we managed to discard. */
2354 new_syms = g_try_renew(struct elf_sym, syms, nsyms);
2355 if (new_syms == NULL) {
2356 goto give_up;
2357 }
2358 syms = new_syms;
2359
2360 qsort(syms, nsyms, sizeof(*syms), symcmp);
2361
2362 s->disas_num_syms = nsyms;
2363 #if ELF_CLASS == ELFCLASS32
2364 s->disas_symtab.elf32 = syms;
2365 #else
2366 s->disas_symtab.elf64 = syms;
2367 #endif
2368 s->lookup_symbol = lookup_symbolxx;
2369 s->next = syminfos;
2370 syminfos = s;
2371
2372 return;
2373
2374 give_up:
2375 g_free(s);
2376 g_free(strings);
2377 g_free(syms);
2378 }
2379
2380 int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
2381 {
2382 struct image_info interp_info;
2383 struct elfhdr elf_ex;
2384 char *elf_interpreter = NULL;
2385 char *scratch;
2386
2387 info->start_mmap = (abi_ulong)ELF_START_MMAP;
2388
2389 load_elf_image(bprm->filename, bprm->fd, info,
2390 &elf_interpreter, bprm->buf);
2391
2392 /* ??? We need a copy of the elf header for passing to create_elf_tables.
2393 If we do nothing, we'll have overwritten this when we re-use bprm->buf
2394 when we load the interpreter. */
2395 elf_ex = *(struct elfhdr *)bprm->buf;
2396
2397 /* Do this so that we can load the interpreter, if need be. We will
2398 change some of these later */
2399 bprm->p = setup_arg_pages(bprm, info);
2400
2401 scratch = g_new0(char, TARGET_PAGE_SIZE);
2402 if (STACK_GROWS_DOWN) {
2403 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2404 bprm->p, info->stack_limit);
2405 info->file_string = bprm->p;
2406 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2407 bprm->p, info->stack_limit);
2408 info->env_strings = bprm->p;
2409 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2410 bprm->p, info->stack_limit);
2411 info->arg_strings = bprm->p;
2412 } else {
2413 info->arg_strings = bprm->p;
2414 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2415 bprm->p, info->stack_limit);
2416 info->env_strings = bprm->p;
2417 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2418 bprm->p, info->stack_limit);
2419 info->file_string = bprm->p;
2420 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2421 bprm->p, info->stack_limit);
2422 }
2423
2424 g_free(scratch);
2425
2426 if (!bprm->p) {
2427 fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
2428 exit(-1);
2429 }
2430
2431 if (elf_interpreter) {
2432 load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
2433
2434 /* If the program interpreter is one of these two, then assume
2435 an iBCS2 image. Otherwise assume a native linux image. */
2436
2437 if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
2438 || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
2439 info->personality = PER_SVR4;
2440
2441 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
2442 and some applications "depend" upon this behavior. Since
2443 we do not have the power to recompile these, we emulate
2444 the SVr4 behavior. Sigh. */
2445 target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
2446 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
2447 }
2448 }
2449
2450 bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
2451 info, (elf_interpreter ? &interp_info : NULL));
2452 info->start_stack = bprm->p;
2453
2454 /* If we have an interpreter, set that as the program's entry point.
2455 Copy the load_bias as well, to help PPC64 interpret the entry
2456 point as a function descriptor. Do this after creating elf tables
2457 so that we copy the original program entry point into the AUXV. */
2458 if (elf_interpreter) {
2459 info->load_bias = interp_info.load_bias;
2460 info->entry = interp_info.entry;
2461 free(elf_interpreter);
2462 }
2463
2464 #ifdef USE_ELF_CORE_DUMP
2465 bprm->core_dump = &elf_core_dump;
2466 #endif
2467
2468 return 0;
2469 }
2470
2471 #ifdef USE_ELF_CORE_DUMP
2472 /*
2473 * Definitions to generate Intel SVR4-like core files.
2474 * These mostly have the same names as the SVR4 types with "target_elf_"
2475 * tacked on the front to prevent clashes with linux definitions,
2476 * and the typedef forms have been avoided. This is mostly like
2477 * the SVR4 structure, but more Linuxy, with things that Linux does
2478 * not support and which gdb doesn't really use excluded.
2479 *
2480 * Fields we don't dump (their contents is zero) in linux-user qemu
2481 * are marked with XXX.
2482 *
2483 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
2484 *
2485 * Porting ELF coredump for target is (quite) simple process. First you
2486 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
2487 * the target resides):
2488 *
2489 * #define USE_ELF_CORE_DUMP
2490 *
2491 * Next you define type of register set used for dumping. ELF specification
2492 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
2493 *
2494 * typedef <target_regtype> target_elf_greg_t;
2495 * #define ELF_NREG <number of registers>
2496 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
2497 *
2498 * Last step is to implement target specific function that copies registers
2499 * from given cpu into just specified register set. Prototype is:
2500 *
2501 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
2502 * const CPUArchState *env);
2503 *
2504 * Parameters:
2505 * regs - copy register values into here (allocated and zeroed by caller)
2506 * env - copy registers from here
2507 *
2508 * Example for ARM target is provided in this file.
2509 */
2510
2511 /* An ELF note in memory */
2512 struct memelfnote {
2513 const char *name;
2514 size_t namesz;
2515 size_t namesz_rounded;
2516 int type;
2517 size_t datasz;
2518 size_t datasz_rounded;
2519 void *data;
2520 size_t notesz;
2521 };
2522
2523 struct target_elf_siginfo {
2524 abi_int si_signo; /* signal number */
2525 abi_int si_code; /* extra code */
2526 abi_int si_errno; /* errno */
2527 };
2528
2529 struct target_elf_prstatus {
2530 struct target_elf_siginfo pr_info; /* Info associated with signal */
2531 abi_short pr_cursig; /* Current signal */
2532 abi_ulong pr_sigpend; /* XXX */
2533 abi_ulong pr_sighold; /* XXX */
2534 target_pid_t pr_pid;
2535 target_pid_t pr_ppid;
2536 target_pid_t pr_pgrp;
2537 target_pid_t pr_sid;
2538 struct target_timeval pr_utime; /* XXX User time */
2539 struct target_timeval pr_stime; /* XXX System time */
2540 struct target_timeval pr_cutime; /* XXX Cumulative user time */
2541 struct target_timeval pr_cstime; /* XXX Cumulative system time */
2542 target_elf_gregset_t pr_reg; /* GP registers */
2543 abi_int pr_fpvalid; /* XXX */
2544 };
2545
2546 #define ELF_PRARGSZ (80) /* Number of chars for args */
2547
2548 struct target_elf_prpsinfo {
2549 char pr_state; /* numeric process state */
2550 char pr_sname; /* char for pr_state */
2551 char pr_zomb; /* zombie */
2552 char pr_nice; /* nice val */
2553 abi_ulong pr_flag; /* flags */
2554 target_uid_t pr_uid;
2555 target_gid_t pr_gid;
2556 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
2557 /* Lots missing */
2558 char pr_fname[16]; /* filename of executable */
2559 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
2560 };
2561
2562 /* Here is the structure in which status of each thread is captured. */
2563 struct elf_thread_status {
2564 QTAILQ_ENTRY(elf_thread_status) ets_link;
2565 struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
2566 #if 0
2567 elf_fpregset_t fpu; /* NT_PRFPREG */
2568 struct task_struct *thread;
2569 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
2570 #endif
2571 struct memelfnote notes[1];
2572 int num_notes;
2573 };
2574
2575 struct elf_note_info {
2576 struct memelfnote *notes;
2577 struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
2578 struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
2579
2580 QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list;
2581 #if 0
2582 /*
2583 * Current version of ELF coredump doesn't support
2584 * dumping fp regs etc.
2585 */
2586 elf_fpregset_t *fpu;
2587 elf_fpxregset_t *xfpu;
2588 int thread_status_size;
2589 #endif
2590 int notes_size;
2591 int numnote;
2592 };
2593
2594 struct vm_area_struct {
2595 target_ulong vma_start; /* start vaddr of memory region */
2596 target_ulong vma_end; /* end vaddr of memory region */
2597 abi_ulong vma_flags; /* protection etc. flags for the region */
2598 QTAILQ_ENTRY(vm_area_struct) vma_link;
2599 };
2600
2601 struct mm_struct {
2602 QTAILQ_HEAD(, vm_area_struct) mm_mmap;
2603 int mm_count; /* number of mappings */
2604 };
2605
2606 static struct mm_struct *vma_init(void);
2607 static void vma_delete(struct mm_struct *);
2608 static int vma_add_mapping(struct mm_struct *, target_ulong,
2609 target_ulong, abi_ulong);
2610 static int vma_get_mapping_count(const struct mm_struct *);
2611 static struct vm_area_struct *vma_first(const struct mm_struct *);
2612 static struct vm_area_struct *vma_next(struct vm_area_struct *);
2613 static abi_ulong vma_dump_size(const struct vm_area_struct *);
2614 static int vma_walker(void *priv, target_ulong start, target_ulong end,
2615 unsigned long flags);
2616
2617 static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
2618 static void fill_note(struct memelfnote *, const char *, int,
2619 unsigned int, void *);
2620 static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
2621 static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
2622 static void fill_auxv_note(struct memelfnote *, const TaskState *);
2623 static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
2624 static size_t note_size(const struct memelfnote *);
2625 static void free_note_info(struct elf_note_info *);
2626 static int fill_note_info(struct elf_note_info *, long, const CPUArchState *);
2627 static void fill_thread_info(struct elf_note_info *, const CPUArchState *);
2628 static int core_dump_filename(const TaskState *, char *, size_t);
2629
2630 static int dump_write(int, const void *, size_t);
2631 static int write_note(struct memelfnote *, int);
2632 static int write_note_info(struct elf_note_info *, int);
2633
2634 #ifdef BSWAP_NEEDED
2635 static void bswap_prstatus(struct target_elf_prstatus *prstatus)
2636 {
2637 prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo);
2638 prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code);
2639 prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno);
2640 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
2641 prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend);
2642 prstatus->pr_sighold = tswapal(prstatus->pr_sighold);
2643 prstatus->pr_pid = tswap32(prstatus->pr_pid);
2644 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
2645 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
2646 prstatus->pr_sid = tswap32(prstatus->pr_sid);
2647 /* cpu times are not filled, so we skip them */
2648 /* regs should be in correct format already */
2649 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
2650 }
2651
2652 static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
2653 {
2654 psinfo->pr_flag = tswapal(psinfo->pr_flag);
2655 psinfo->pr_uid = tswap16(psinfo->pr_uid);
2656 psinfo->pr_gid = tswap16(psinfo->pr_gid);
2657 psinfo->pr_pid = tswap32(psinfo->pr_pid);
2658 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
2659 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
2660 psinfo->pr_sid = tswap32(psinfo->pr_sid);
2661 }
2662
2663 static void bswap_note(struct elf_note *en)
2664 {
2665 bswap32s(&en->n_namesz);
2666 bswap32s(&en->n_descsz);
2667 bswap32s(&en->n_type);
2668 }
2669 #else
2670 static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
2671 static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
2672 static inline void bswap_note(struct elf_note *en) { }
2673 #endif /* BSWAP_NEEDED */
2674
2675 /*
2676 * Minimal support for linux memory regions. These are needed
2677 * when we are finding out what memory exactly belongs to
2678 * emulated process. No locks needed here, as long as
2679 * thread that received the signal is stopped.
2680 */
2681
2682 static struct mm_struct *vma_init(void)
2683 {
2684 struct mm_struct *mm;
2685
2686 if ((mm = g_malloc(sizeof (*mm))) == NULL)
2687 return (NULL);
2688
2689 mm->mm_count = 0;
2690 QTAILQ_INIT(&mm->mm_mmap);
2691
2692 return (mm);
2693 }
2694
2695 static void vma_delete(struct mm_struct *mm)
2696 {
2697 struct vm_area_struct *vma;
2698
2699 while ((vma = vma_first(mm)) != NULL) {
2700 QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
2701 g_free(vma);
2702 }
2703 g_free(mm);
2704 }
2705
2706 static int vma_add_mapping(struct mm_struct *mm, target_ulong start,
2707 target_ulong end, abi_ulong flags)
2708 {
2709 struct vm_area_struct *vma;
2710
2711 if ((vma = g_malloc0(sizeof (*vma))) == NULL)
2712 return (-1);
2713
2714 vma->vma_start = start;
2715 vma->vma_end = end;
2716 vma->vma_flags = flags;
2717
2718 QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
2719 mm->mm_count++;
2720
2721 return (0);
2722 }
2723
2724 static struct vm_area_struct *vma_first(const struct mm_struct *mm)
2725 {
2726 return (QTAILQ_FIRST(&mm->mm_mmap));
2727 }
2728
2729 static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
2730 {
2731 return (QTAILQ_NEXT(vma, vma_link));
2732 }
2733
2734 static int vma_get_mapping_count(const struct mm_struct *mm)
2735 {
2736 return (mm->mm_count);
2737 }
2738
2739 /*
2740 * Calculate file (dump) size of given memory region.
2741 */
2742 static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
2743 {
2744 /* if we cannot even read the first page, skip it */
2745 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
2746 return (0);
2747
2748 /*
2749 * Usually we don't dump executable pages as they contain
2750 * non-writable code that debugger can read directly from
2751 * target library etc. However, thread stacks are marked
2752 * also executable so we read in first page of given region
2753 * and check whether it contains elf header. If there is
2754 * no elf header, we dump it.
2755 */
2756 if (vma->vma_flags & PROT_EXEC) {
2757 char page[TARGET_PAGE_SIZE];
2758
2759 copy_from_user(page, vma->vma_start, sizeof (page));
2760 if ((page[EI_MAG0] == ELFMAG0) &&
2761 (page[EI_MAG1] == ELFMAG1) &&
2762 (page[EI_MAG2] == ELFMAG2) &&
2763 (page[EI_MAG3] == ELFMAG3)) {
2764 /*
2765 * Mappings are possibly from ELF binary. Don't dump
2766 * them.
2767 */
2768 return (0);
2769 }
2770 }
2771
2772 return (vma->vma_end - vma->vma_start);
2773 }
2774
2775 static int vma_walker(void *priv, target_ulong start, target_ulong end,
2776 unsigned long flags)
2777 {
2778 struct mm_struct *mm = (struct mm_struct *)priv;
2779
2780 vma_add_mapping(mm, start, end, flags);
2781 return (0);
2782 }
2783
2784 static void fill_note(struct memelfnote *note, const char *name, int type,
2785 unsigned int sz, void *data)
2786 {
2787 unsigned int namesz;
2788
2789 namesz = strlen(name) + 1;
2790 note->name = name;
2791 note->namesz = namesz;
2792 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
2793 note->type = type;
2794 note->datasz = sz;
2795 note->datasz_rounded = roundup(sz, sizeof (int32_t));
2796
2797 note->data = data;
2798
2799 /*
2800 * We calculate rounded up note size here as specified by
2801 * ELF document.
2802 */
2803 note->notesz = sizeof (struct elf_note) +
2804 note->namesz_rounded + note->datasz_rounded;
2805 }
2806
2807 static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
2808 uint32_t flags)
2809 {
2810 (void) memset(elf, 0, sizeof(*elf));
2811
2812 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
2813 elf->e_ident[EI_CLASS] = ELF_CLASS;
2814 elf->e_ident[EI_DATA] = ELF_DATA;
2815 elf->e_ident[EI_VERSION] = EV_CURRENT;
2816 elf->e_ident[EI_OSABI] = ELF_OSABI;
2817
2818 elf->e_type = ET_CORE;
2819 elf->e_machine = machine;
2820 elf->e_version = EV_CURRENT;
2821 elf->e_phoff = sizeof(struct elfhdr);
2822 elf->e_flags = flags;
2823 elf->e_ehsize = sizeof(struct elfhdr);
2824 elf->e_phentsize = sizeof(struct elf_phdr);
2825 elf->e_phnum = segs;
2826
2827 bswap_ehdr(elf);
2828 }
2829
2830 static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
2831 {
2832 phdr->p_type = PT_NOTE;
2833 phdr->p_offset = offset;
2834 phdr->p_vaddr = 0;
2835 phdr->p_paddr = 0;
2836 phdr->p_filesz = sz;
2837 phdr->p_memsz = 0;
2838 phdr->p_flags = 0;
2839 phdr->p_align = 0;
2840
2841 bswap_phdr(phdr, 1);
2842 }
2843
2844 static size_t note_size(const struct memelfnote *note)
2845 {
2846 return (note->notesz);
2847 }
2848
2849 static void fill_prstatus(struct target_elf_prstatus *prstatus,
2850 const TaskState *ts, int signr)
2851 {
2852 (void) memset(prstatus, 0, sizeof (*prstatus));
2853 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
2854 prstatus->pr_pid = ts->ts_tid;
2855 prstatus->pr_ppid = getppid();
2856 prstatus->pr_pgrp = getpgrp();
2857 prstatus->pr_sid = getsid(0);
2858
2859 bswap_prstatus(prstatus);
2860 }
2861
2862 static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
2863 {
2864 char *base_filename;
2865 unsigned int i, len;
2866
2867 (void) memset(psinfo, 0, sizeof (*psinfo));
2868
2869 len = ts->info->arg_end - ts->info->arg_start;
2870 if (len >= ELF_PRARGSZ)
2871 len = ELF_PRARGSZ - 1;
2872 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
2873 return -EFAULT;
2874 for (i = 0; i < len; i++)
2875 if (psinfo->pr_psargs[i] == 0)
2876 psinfo->pr_psargs[i] = ' ';
2877 psinfo->pr_psargs[len] = 0;
2878
2879 psinfo->pr_pid = getpid();
2880 psinfo->pr_ppid = getppid();
2881 psinfo->pr_pgrp = getpgrp();
2882 psinfo->pr_sid = getsid(0);
2883 psinfo->pr_uid = getuid();
2884 psinfo->pr_gid = getgid();
2885
2886 base_filename = g_path_get_basename(ts->bprm->filename);
2887 /*
2888 * Using strncpy here is fine: at max-length,
2889 * this field is not NUL-terminated.
2890 */
2891 (void) strncpy(psinfo->pr_fname, base_filename,
2892 sizeof(psinfo->pr_fname));
2893
2894 g_free(base_filename);
2895 bswap_psinfo(psinfo);
2896 return (0);
2897 }
2898
2899 static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
2900 {
2901 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
2902 elf_addr_t orig_auxv = auxv;
2903 void *ptr;
2904 int len = ts->info->auxv_len;
2905
2906 /*
2907 * Auxiliary vector is stored in target process stack. It contains
2908 * {type, value} pairs that we need to dump into note. This is not
2909 * strictly necessary but we do it here for sake of completeness.
2910 */
2911
2912 /* read in whole auxv vector and copy it to memelfnote */
2913 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
2914 if (ptr != NULL) {
2915 fill_note(note, "CORE", NT_AUXV, len, ptr);
2916 unlock_user(ptr, auxv, len);
2917 }
2918 }
2919
2920 /*
2921 * Constructs name of coredump file. We have following convention
2922 * for the name:
2923 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
2924 *
2925 * Returns 0 in case of success, -1 otherwise (errno is set).
2926 */
2927 static int core_dump_filename(const TaskState *ts, char *buf,
2928 size_t bufsize)
2929 {
2930 char timestamp[64];
2931 char *base_filename = NULL;
2932 struct timeval tv;
2933 struct tm tm;
2934
2935 assert(bufsize >= PATH_MAX);
2936
2937 if (gettimeofday(&tv, NULL) < 0) {
2938 (void) fprintf(stderr, "unable to get current timestamp: %s",
2939 strerror(errno));
2940 return (-1);
2941 }
2942
2943 base_filename = g_path_get_basename(ts->bprm->filename);
2944 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
2945 localtime_r(&tv.tv_sec, &tm));
2946 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
2947 base_filename, timestamp, (int)getpid());
2948 g_free(base_filename);
2949
2950 return (0);
2951 }
2952
2953 static int dump_write(int fd, const void *ptr, size_t size)
2954 {
2955 const char *bufp = (const char *)ptr;
2956 ssize_t bytes_written, bytes_left;
2957 struct rlimit dumpsize;
2958 off_t pos;
2959
2960 bytes_written = 0;
2961 getrlimit(RLIMIT_CORE, &dumpsize);
2962 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
2963 if (errno == ESPIPE) { /* not a seekable stream */
2964 bytes_left = size;
2965 } else {
2966 return pos;
2967 }
2968 } else {
2969 if (dumpsize.rlim_cur <= pos) {
2970 return -1;
2971 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
2972 bytes_left = size;
2973 } else {
2974 size_t limit_left=dumpsize.rlim_cur - pos;
2975 bytes_left = limit_left >= size ? size : limit_left ;
2976 }
2977 }
2978
2979 /*
2980 * In normal conditions, single write(2) should do but
2981 * in case of socket etc. this mechanism is more portable.
2982 */
2983 do {
2984 bytes_written = write(fd, bufp, bytes_left);
2985 if (bytes_written < 0) {
2986 if (errno == EINTR)
2987 continue;
2988 return (-1);
2989 } else if (bytes_written == 0) { /* eof */
2990 return (-1);
2991 }
2992 bufp += bytes_written;
2993 bytes_left -= bytes_written;
2994 } while (bytes_left > 0);
2995
2996 return (0);
2997 }
2998
2999 static int write_note(struct memelfnote *men, int fd)
3000 {
3001 struct elf_note en;
3002
3003 en.n_namesz = men->namesz;
3004 en.n_type = men->type;
3005 en.n_descsz = men->datasz;
3006
3007 bswap_note(&en);
3008
3009 if (dump_write(fd, &en, sizeof(en)) != 0)
3010 return (-1);
3011 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
3012 return (-1);
3013 if (dump_write(fd, men->data, men->datasz_rounded) != 0)
3014 return (-1);
3015
3016 return (0);
3017 }
3018
3019 static void fill_thread_info(struct elf_note_info *info, const CPUArchState *env)
3020 {
3021 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3022 TaskState *ts = (TaskState *)cpu->opaque;
3023 struct elf_thread_status *ets;
3024
3025 ets = g_malloc0(sizeof (*ets));
3026 ets->num_notes = 1; /* only prstatus is dumped */
3027 fill_prstatus(&ets->prstatus, ts, 0);
3028 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
3029 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
3030 &ets->prstatus);
3031
3032 QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
3033
3034 info->notes_size += note_size(&ets->notes[0]);
3035 }
3036
3037 static void init_note_info(struct elf_note_info *info)
3038 {
3039 /* Initialize the elf_note_info structure so that it is at
3040 * least safe to call free_note_info() on it. Must be
3041 * called before calling fill_note_info().
3042 */
3043 memset(info, 0, sizeof (*info));
3044 QTAILQ_INIT(&info->thread_list);
3045 }
3046
3047 static int fill_note_info(struct elf_note_info *info,
3048 long signr, const CPUArchState *env)
3049 {
3050 #define NUMNOTES 3
3051 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3052 TaskState *ts = (TaskState *)cpu->opaque;
3053 int i;
3054
3055 info->notes = g_new0(struct memelfnote, NUMNOTES);
3056 if (info->notes == NULL)
3057 return (-ENOMEM);
3058 info->prstatus = g_malloc0(sizeof (*info->prstatus));
3059 if (info->prstatus == NULL)
3060 return (-ENOMEM);
3061 info->psinfo = g_malloc0(sizeof (*info->psinfo));
3062 if (info->prstatus == NULL)
3063 return (-ENOMEM);
3064
3065 /*
3066 * First fill in status (and registers) of current thread
3067 * including process info & aux vector.
3068 */
3069 fill_prstatus(info->prstatus, ts, signr);
3070 elf_core_copy_regs(&info->prstatus->pr_reg, env);
3071 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
3072 sizeof (*info->prstatus), info->prstatus);
3073 fill_psinfo(info->psinfo, ts);
3074 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
3075 sizeof (*info->psinfo), info->psinfo);
3076 fill_auxv_note(&info->notes[2], ts);
3077 info->numnote = 3;
3078
3079 info->notes_size = 0;
3080 for (i = 0; i < info->numnote; i++)
3081 info->notes_size += note_size(&info->notes[i]);
3082
3083 /* read and fill status of all threads */
3084 cpu_list_lock();
3085 CPU_FOREACH(cpu) {
3086 if (cpu == thread_cpu) {
3087 continue;
3088 }
3089 fill_thread_info(info, (CPUArchState *)cpu->env_ptr);
3090 }
3091 cpu_list_unlock();
3092
3093 return (0);
3094 }
3095
3096 static void free_note_info(struct elf_note_info *info)
3097 {
3098 struct elf_thread_status *ets;
3099
3100 while (!QTAILQ_EMPTY(&info->thread_list)) {
3101 ets = QTAILQ_FIRST(&info->thread_list);
3102 QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
3103 g_free(ets);
3104 }
3105
3106 g_free(info->prstatus);
3107 g_free(info->psinfo);
3108 g_free(info->notes);
3109 }
3110
3111 static int write_note_info(struct elf_note_info *info, int fd)
3112 {
3113 struct elf_thread_status *ets;
3114 int i, error = 0;
3115
3116 /* write prstatus, psinfo and auxv for current thread */
3117 for (i = 0; i < info->numnote; i++)
3118 if ((error = write_note(&info->notes[i], fd)) != 0)
3119 return (error);
3120
3121 /* write prstatus for each thread */
3122 QTAILQ_FOREACH(ets, &info->thread_list, ets_link) {
3123 if ((error = write_note(&ets->notes[0], fd)) != 0)
3124 return (error);
3125 }
3126
3127 return (0);
3128 }
3129
3130 /*
3131 * Write out ELF coredump.
3132 *
3133 * See documentation of ELF object file format in:
3134 * http://www.caldera.com/developers/devspecs/gabi41.pdf
3135 *
3136 * Coredump format in linux is following:
3137 *
3138 * 0 +----------------------+ \
3139 * | ELF header | ET_CORE |
3140 * +----------------------+ |
3141 * | ELF program headers | |--- headers
3142 * | - NOTE section | |
3143 * | - PT_LOAD sections | |
3144 * +----------------------+ /
3145 * | NOTEs: |
3146 * | - NT_PRSTATUS |
3147 * | - NT_PRSINFO |
3148 * | - NT_AUXV |
3149 * +----------------------+ <-- aligned to target page
3150 * | Process memory dump |
3151 * : :
3152 * . .
3153 * : :
3154 * | |
3155 * +----------------------+
3156 *
3157 * NT_PRSTATUS -> struct elf_prstatus (per thread)
3158 * NT_PRSINFO -> struct elf_prpsinfo
3159 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
3160 *
3161 * Format follows System V format as close as possible. Current
3162 * version limitations are as follows:
3163 * - no floating point registers are dumped
3164 *
3165 * Function returns 0 in case of success, negative errno otherwise.
3166 *
3167 * TODO: make this work also during runtime: it should be
3168 * possible to force coredump from running process and then
3169 * continue processing. For example qemu could set up SIGUSR2
3170 * handler (provided that target process haven't registered
3171 * handler for that) that does the dump when signal is received.
3172 */
3173 static int elf_core_dump(int signr, const CPUArchState *env)
3174 {
3175 const CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3176 const TaskState *ts = (const TaskState *)cpu->opaque;
3177 struct vm_area_struct *vma = NULL;
3178 char corefile[PATH_MAX];
3179 struct elf_note_info info;
3180 struct elfhdr elf;
3181 struct elf_phdr phdr;
3182 struct rlimit dumpsize;
3183 struct mm_struct *mm = NULL;
3184 off_t offset = 0, data_offset = 0;
3185 int segs = 0;
3186 int fd = -1;
3187
3188 init_note_info(&info);
3189
3190 errno = 0;
3191 getrlimit(RLIMIT_CORE, &dumpsize);
3192 if (dumpsize.rlim_cur == 0)
3193 return 0;
3194
3195 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
3196 return (-errno);
3197
3198 if ((fd = open(corefile, O_WRONLY | O_CREAT,
3199 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
3200 return (-errno);
3201
3202 /*
3203 * Walk through target process memory mappings and
3204 * set up structure containing this information. After
3205 * this point vma_xxx functions can be used.
3206 */
3207 if ((mm = vma_init()) == NULL)
3208 goto out;
3209
3210 walk_memory_regions(mm, vma_walker);
3211 segs = vma_get_mapping_count(mm);
3212
3213 /*
3214 * Construct valid coredump ELF header. We also
3215 * add one more segment for notes.
3216 */
3217 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
3218 if (dump_write(fd, &elf, sizeof (elf)) != 0)
3219 goto out;
3220
3221 /* fill in the in-memory version of notes */
3222 if (fill_note_info(&info, signr, env) < 0)
3223 goto out;
3224
3225 offset += sizeof (elf); /* elf header */
3226 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
3227
3228 /* write out notes program header */
3229 fill_elf_note_phdr(&phdr, info.notes_size, offset);
3230
3231 offset += info.notes_size;
3232 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
3233 goto out;
3234
3235 /*
3236 * ELF specification wants data to start at page boundary so
3237 * we align it here.
3238 */
3239 data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE);
3240
3241 /*
3242 * Write program headers for memory regions mapped in
3243 * the target process.
3244 */
3245 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3246 (void) memset(&phdr, 0, sizeof (phdr));
3247
3248 phdr.p_type = PT_LOAD;
3249 phdr.p_offset = offset;
3250 phdr.p_vaddr = vma->vma_start;
3251 phdr.p_paddr = 0;
3252 phdr.p_filesz = vma_dump_size(vma);
3253 offset += phdr.p_filesz;
3254 phdr.p_memsz = vma->vma_end - vma->vma_start;
3255 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
3256 if (vma->vma_flags & PROT_WRITE)
3257 phdr.p_flags |= PF_W;
3258 if (vma->vma_flags & PROT_EXEC)
3259 phdr.p_flags |= PF_X;
3260 phdr.p_align = ELF_EXEC_PAGESIZE;
3261
3262 bswap_phdr(&phdr, 1);
3263 if (dump_write(fd, &phdr, sizeof(phdr)) != 0) {
3264 goto out;
3265 }
3266 }
3267
3268 /*
3269 * Next we write notes just after program headers. No
3270 * alignment needed here.
3271 */
3272 if (write_note_info(&info, fd) < 0)
3273 goto out;
3274
3275 /* align data to page boundary */
3276 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
3277 goto out;
3278
3279 /*
3280 * Finally we can dump process memory into corefile as well.
3281 */
3282 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3283 abi_ulong addr;
3284 abi_ulong end;
3285
3286 end = vma->vma_start + vma_dump_size(vma);
3287
3288 for (addr = vma->vma_start; addr < end;
3289 addr += TARGET_PAGE_SIZE) {
3290 char page[TARGET_PAGE_SIZE];
3291 int error;
3292
3293 /*
3294 * Read in page from target process memory and
3295 * write it to coredump file.
3296 */
3297 error = copy_from_user(page, addr, sizeof (page));
3298 if (error != 0) {
3299 (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
3300 addr);
3301 errno = -error;
3302 goto out;
3303 }
3304 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
3305 goto out;
3306 }
3307 }
3308
3309 out:
3310 free_note_info(&info);
3311 if (mm != NULL)
3312 vma_delete(mm);
3313 (void) close(fd);
3314
3315 if (errno != 0)
3316 return (-errno);
3317 return (0);
3318 }
3319 #endif /* USE_ELF_CORE_DUMP */
3320
3321 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
3322 {
3323 init_thread(regs, infop);
3324 }
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