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sparc64: trace pstate and global register set changes
[qemu/aliguori-queue.git] / linux-user / elfload.c
blobb90604b447aa0ffbe776d5a7f02f994017a89898
1 /* This is the Linux kernel elf-loading code, ported into user space */
2 #include <sys/time.h>
3 #include <sys/param.h>
4
5 #include <stdio.h>
6 #include <sys/types.h>
7 #include <fcntl.h>
8 #include <errno.h>
9 #include <unistd.h>
10 #include <sys/mman.h>
11 #include <sys/resource.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <time.h>
15
16 #include "qemu.h"
17 #include "disas.h"
18
19 #ifdef _ARCH_PPC64
20 #undef ARCH_DLINFO
21 #undef ELF_PLATFORM
22 #undef ELF_HWCAP
23 #undef ELF_CLASS
24 #undef ELF_DATA
25 #undef ELF_ARCH
26 #endif
27
28 #define ELF_OSABI ELFOSABI_SYSV
29
30 /* from personality.h */
31
32 /*
33 * Flags for bug emulation.
34 *
35 * These occupy the top three bytes.
36 */
37 enum {
38 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
39 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors
40 * (signal handling)
41 */
42 MMAP_PAGE_ZERO = 0x0100000,
43 ADDR_COMPAT_LAYOUT = 0x0200000,
44 READ_IMPLIES_EXEC = 0x0400000,
45 ADDR_LIMIT_32BIT = 0x0800000,
46 SHORT_INODE = 0x1000000,
47 WHOLE_SECONDS = 0x2000000,
48 STICKY_TIMEOUTS = 0x4000000,
49 ADDR_LIMIT_3GB = 0x8000000,
50 };
51
52 /*
53 * Personality types.
54 *
55 * These go in the low byte. Avoid using the top bit, it will
56 * conflict with error returns.
57 */
58 enum {
59 PER_LINUX = 0x0000,
60 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
61 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
62 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
63 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
64 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS |
65 WHOLE_SECONDS | SHORT_INODE,
66 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
67 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
68 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
69 PER_BSD = 0x0006,
70 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
71 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
72 PER_LINUX32 = 0x0008,
73 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
74 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
75 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
76 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
77 PER_RISCOS = 0x000c,
78 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
79 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
80 PER_OSF4 = 0x000f, /* OSF/1 v4 */
81 PER_HPUX = 0x0010,
82 PER_MASK = 0x00ff,
83 };
84
85 /*
86 * Return the base personality without flags.
87 */
88 #define personality(pers) (pers & PER_MASK)
89
90 /* this flag is uneffective under linux too, should be deleted */
91 #ifndef MAP_DENYWRITE
92 #define MAP_DENYWRITE 0
93 #endif
94
95 /* should probably go in elf.h */
96 #ifndef ELIBBAD
97 #define ELIBBAD 80
98 #endif
99
100 typedef target_ulong target_elf_greg_t;
101 #ifdef USE_UID16
102 typedef uint16_t target_uid_t;
103 typedef uint16_t target_gid_t;
104 #else
105 typedef uint32_t target_uid_t;
106 typedef uint32_t target_gid_t;
107 #endif
108 typedef int32_t target_pid_t;
109
110 #ifdef TARGET_I386
111
112 #define ELF_PLATFORM get_elf_platform()
113
114 static const char *get_elf_platform(void)
115 {
116 static char elf_platform[] = "i386";
117 int family = (thread_env->cpuid_version >> 8) & 0xff;
118 if (family > 6)
119 family = 6;
120 if (family >= 3)
121 elf_platform[1] = '0' + family;
122 return elf_platform;
123 }
124
125 #define ELF_HWCAP get_elf_hwcap()
126
127 static uint32_t get_elf_hwcap(void)
128 {
129 return thread_env->cpuid_features;
130 }
131
132 #ifdef TARGET_X86_64
133 #define ELF_START_MMAP 0x2aaaaab000ULL
134 #define elf_check_arch(x) ( ((x) == ELF_ARCH) )
135
136 #define ELF_CLASS ELFCLASS64
137 #define ELF_DATA ELFDATA2LSB
138 #define ELF_ARCH EM_X86_64
139
140 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
141 {
142 regs->rax = 0;
143 regs->rsp = infop->start_stack;
144 regs->rip = infop->entry;
145 }
146
147 #define ELF_NREG 27
148 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
149
150 /*
151 * Note that ELF_NREG should be 29 as there should be place for
152 * TRAPNO and ERR "registers" as well but linux doesn't dump
153 * those.
154 *
155 * See linux kernel: arch/x86/include/asm/elf.h
156 */
157 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
158 {
159 (*regs)[0] = env->regs[15];
160 (*regs)[1] = env->regs[14];
161 (*regs)[2] = env->regs[13];
162 (*regs)[3] = env->regs[12];
163 (*regs)[4] = env->regs[R_EBP];
164 (*regs)[5] = env->regs[R_EBX];
165 (*regs)[6] = env->regs[11];
166 (*regs)[7] = env->regs[10];
167 (*regs)[8] = env->regs[9];
168 (*regs)[9] = env->regs[8];
169 (*regs)[10] = env->regs[R_EAX];
170 (*regs)[11] = env->regs[R_ECX];
171 (*regs)[12] = env->regs[R_EDX];
172 (*regs)[13] = env->regs[R_ESI];
173 (*regs)[14] = env->regs[R_EDI];
174 (*regs)[15] = env->regs[R_EAX]; /* XXX */
175 (*regs)[16] = env->eip;
176 (*regs)[17] = env->segs[R_CS].selector & 0xffff;
177 (*regs)[18] = env->eflags;
178 (*regs)[19] = env->regs[R_ESP];
179 (*regs)[20] = env->segs[R_SS].selector & 0xffff;
180 (*regs)[21] = env->segs[R_FS].selector & 0xffff;
181 (*regs)[22] = env->segs[R_GS].selector & 0xffff;
182 (*regs)[23] = env->segs[R_DS].selector & 0xffff;
183 (*regs)[24] = env->segs[R_ES].selector & 0xffff;
184 (*regs)[25] = env->segs[R_FS].selector & 0xffff;
185 (*regs)[26] = env->segs[R_GS].selector & 0xffff;
186 }
187
188 #else
189
190 #define ELF_START_MMAP 0x80000000
191
192 /*
193 * This is used to ensure we don't load something for the wrong architecture.
194 */
195 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
196
197 /*
198 * These are used to set parameters in the core dumps.
199 */
200 #define ELF_CLASS ELFCLASS32
201 #define ELF_DATA ELFDATA2LSB
202 #define ELF_ARCH EM_386
203
204 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
205 {
206 regs->esp = infop->start_stack;
207 regs->eip = infop->entry;
208
209 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
210 starts %edx contains a pointer to a function which might be
211 registered using `atexit'. This provides a mean for the
212 dynamic linker to call DT_FINI functions for shared libraries
213 that have been loaded before the code runs.
214
215 A value of 0 tells we have no such handler. */
216 regs->edx = 0;
217 }
218
219 #define ELF_NREG 17
220 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
221
222 /*
223 * Note that ELF_NREG should be 19 as there should be place for
224 * TRAPNO and ERR "registers" as well but linux doesn't dump
225 * those.
226 *
227 * See linux kernel: arch/x86/include/asm/elf.h
228 */
229 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
230 {
231 (*regs)[0] = env->regs[R_EBX];
232 (*regs)[1] = env->regs[R_ECX];
233 (*regs)[2] = env->regs[R_EDX];
234 (*regs)[3] = env->regs[R_ESI];
235 (*regs)[4] = env->regs[R_EDI];
236 (*regs)[5] = env->regs[R_EBP];
237 (*regs)[6] = env->regs[R_EAX];
238 (*regs)[7] = env->segs[R_DS].selector & 0xffff;
239 (*regs)[8] = env->segs[R_ES].selector & 0xffff;
240 (*regs)[9] = env->segs[R_FS].selector & 0xffff;
241 (*regs)[10] = env->segs[R_GS].selector & 0xffff;
242 (*regs)[11] = env->regs[R_EAX]; /* XXX */
243 (*regs)[12] = env->eip;
244 (*regs)[13] = env->segs[R_CS].selector & 0xffff;
245 (*regs)[14] = env->eflags;
246 (*regs)[15] = env->regs[R_ESP];
247 (*regs)[16] = env->segs[R_SS].selector & 0xffff;
248 }
249 #endif
250
251 #define USE_ELF_CORE_DUMP
252 #define ELF_EXEC_PAGESIZE 4096
253
254 #endif
255
256 #ifdef TARGET_ARM
257
258 #define ELF_START_MMAP 0x80000000
259
260 #define elf_check_arch(x) ( (x) == EM_ARM )
261
262 #define ELF_CLASS ELFCLASS32
263 #ifdef TARGET_WORDS_BIGENDIAN
264 #define ELF_DATA ELFDATA2MSB
265 #else
266 #define ELF_DATA ELFDATA2LSB
267 #endif
268 #define ELF_ARCH EM_ARM
269
270 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
271 {
272 abi_long stack = infop->start_stack;
273 memset(regs, 0, sizeof(*regs));
274 regs->ARM_cpsr = 0x10;
275 if (infop->entry & 1)
276 regs->ARM_cpsr |= CPSR_T;
277 regs->ARM_pc = infop->entry & 0xfffffffe;
278 regs->ARM_sp = infop->start_stack;
279 /* FIXME - what to for failure of get_user()? */
280 get_user_ual(regs->ARM_r2, stack + 8); /* envp */
281 get_user_ual(regs->ARM_r1, stack + 4); /* envp */
282 /* XXX: it seems that r0 is zeroed after ! */
283 regs->ARM_r0 = 0;
284 /* For uClinux PIC binaries. */
285 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
286 regs->ARM_r10 = infop->start_data;
287 }
288
289 #define ELF_NREG 18
290 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
291
292 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
293 {
294 (*regs)[0] = tswapl(env->regs[0]);
295 (*regs)[1] = tswapl(env->regs[1]);
296 (*regs)[2] = tswapl(env->regs[2]);
297 (*regs)[3] = tswapl(env->regs[3]);
298 (*regs)[4] = tswapl(env->regs[4]);
299 (*regs)[5] = tswapl(env->regs[5]);
300 (*regs)[6] = tswapl(env->regs[6]);
301 (*regs)[7] = tswapl(env->regs[7]);
302 (*regs)[8] = tswapl(env->regs[8]);
303 (*regs)[9] = tswapl(env->regs[9]);
304 (*regs)[10] = tswapl(env->regs[10]);
305 (*regs)[11] = tswapl(env->regs[11]);
306 (*regs)[12] = tswapl(env->regs[12]);
307 (*regs)[13] = tswapl(env->regs[13]);
308 (*regs)[14] = tswapl(env->regs[14]);
309 (*regs)[15] = tswapl(env->regs[15]);
310
311 (*regs)[16] = tswapl(cpsr_read((CPUState *)env));
312 (*regs)[17] = tswapl(env->regs[0]); /* XXX */
313 }
314
315 #define USE_ELF_CORE_DUMP
316 #define ELF_EXEC_PAGESIZE 4096
317
318 enum
319 {
320 ARM_HWCAP_ARM_SWP = 1 << 0,
321 ARM_HWCAP_ARM_HALF = 1 << 1,
322 ARM_HWCAP_ARM_THUMB = 1 << 2,
323 ARM_HWCAP_ARM_26BIT = 1 << 3,
324 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
325 ARM_HWCAP_ARM_FPA = 1 << 5,
326 ARM_HWCAP_ARM_VFP = 1 << 6,
327 ARM_HWCAP_ARM_EDSP = 1 << 7,
328 ARM_HWCAP_ARM_JAVA = 1 << 8,
329 ARM_HWCAP_ARM_IWMMXT = 1 << 9,
330 ARM_HWCAP_ARM_THUMBEE = 1 << 10,
331 ARM_HWCAP_ARM_NEON = 1 << 11,
332 ARM_HWCAP_ARM_VFPv3 = 1 << 12,
333 ARM_HWCAP_ARM_VFPv3D16 = 1 << 13,
334 };
335
336 #define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
337 | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \
338 | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP \
339 | ARM_HWCAP_ARM_NEON | ARM_HWCAP_ARM_VFPv3 )
340
341 #endif
342
343 #ifdef TARGET_SPARC
344 #ifdef TARGET_SPARC64
345
346 #define ELF_START_MMAP 0x80000000
347
348 #ifndef TARGET_ABI32
349 #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
350 #else
351 #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
352 #endif
353
354 #define ELF_CLASS ELFCLASS64
355 #define ELF_DATA ELFDATA2MSB
356 #define ELF_ARCH EM_SPARCV9
357
358 #define STACK_BIAS 2047
359
360 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
361 {
362 #ifndef TARGET_ABI32
363 regs->tstate = 0;
364 #endif
365 regs->pc = infop->entry;
366 regs->npc = regs->pc + 4;
367 regs->y = 0;
368 #ifdef TARGET_ABI32
369 regs->u_regs[14] = infop->start_stack - 16 * 4;
370 #else
371 if (personality(infop->personality) == PER_LINUX32)
372 regs->u_regs[14] = infop->start_stack - 16 * 4;
373 else
374 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
375 #endif
376 }
377
378 #else
379 #define ELF_START_MMAP 0x80000000
380
381 #define elf_check_arch(x) ( (x) == EM_SPARC )
382
383 #define ELF_CLASS ELFCLASS32
384 #define ELF_DATA ELFDATA2MSB
385 #define ELF_ARCH EM_SPARC
386
387 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
388 {
389 regs->psr = 0;
390 regs->pc = infop->entry;
391 regs->npc = regs->pc + 4;
392 regs->y = 0;
393 regs->u_regs[14] = infop->start_stack - 16 * 4;
394 }
395
396 #endif
397 #endif
398
399 #ifdef TARGET_PPC
400
401 #define ELF_START_MMAP 0x80000000
402
403 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
404
405 #define elf_check_arch(x) ( (x) == EM_PPC64 )
406
407 #define ELF_CLASS ELFCLASS64
408
409 #else
410
411 #define elf_check_arch(x) ( (x) == EM_PPC )
412
413 #define ELF_CLASS ELFCLASS32
414
415 #endif
416
417 #ifdef TARGET_WORDS_BIGENDIAN
418 #define ELF_DATA ELFDATA2MSB
419 #else
420 #define ELF_DATA ELFDATA2LSB
421 #endif
422 #define ELF_ARCH EM_PPC
423
424 /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
425 See arch/powerpc/include/asm/cputable.h. */
426 enum {
427 QEMU_PPC_FEATURE_32 = 0x80000000,
428 QEMU_PPC_FEATURE_64 = 0x40000000,
429 QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
430 QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
431 QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
432 QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
433 QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
434 QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
435 QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
436 QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
437 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
438 QEMU_PPC_FEATURE_NO_TB = 0x00100000,
439 QEMU_PPC_FEATURE_POWER4 = 0x00080000,
440 QEMU_PPC_FEATURE_POWER5 = 0x00040000,
441 QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
442 QEMU_PPC_FEATURE_CELL = 0x00010000,
443 QEMU_PPC_FEATURE_BOOKE = 0x00008000,
444 QEMU_PPC_FEATURE_SMT = 0x00004000,
445 QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
446 QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
447 QEMU_PPC_FEATURE_PA6T = 0x00000800,
448 QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
449 QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
450 QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
451 QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
452 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
453
454 QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
455 QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
456 };
457
458 #define ELF_HWCAP get_elf_hwcap()
459
460 static uint32_t get_elf_hwcap(void)
461 {
462 CPUState *e = thread_env;
463 uint32_t features = 0;
464
465 /* We don't have to be terribly complete here; the high points are
466 Altivec/FP/SPE support. Anything else is just a bonus. */
467 #define GET_FEATURE(flag, feature) \
468 do {if (e->insns_flags & flag) features |= feature; } while(0)
469 GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
470 GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
471 GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
472 GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
473 GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
474 GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
475 GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
476 GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
477 #undef GET_FEATURE
478
479 return features;
480 }
481
482 /*
483 * We need to put in some extra aux table entries to tell glibc what
484 * the cache block size is, so it can use the dcbz instruction safely.
485 */
486 #define AT_DCACHEBSIZE 19
487 #define AT_ICACHEBSIZE 20
488 #define AT_UCACHEBSIZE 21
489 /* A special ignored type value for PPC, for glibc compatibility. */
490 #define AT_IGNOREPPC 22
491 /*
492 * The requirements here are:
493 * - keep the final alignment of sp (sp & 0xf)
494 * - make sure the 32-bit value at the first 16 byte aligned position of
495 * AUXV is greater than 16 for glibc compatibility.
496 * AT_IGNOREPPC is used for that.
497 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
498 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
499 */
500 #define DLINFO_ARCH_ITEMS 5
501 #define ARCH_DLINFO \
502 do { \
503 NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
504 NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
505 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
506 /* \
507 * Now handle glibc compatibility. \
508 */ \
509 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
510 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
511 } while (0)
512
513 static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
514 {
515 abi_ulong pos = infop->start_stack;
516 abi_ulong tmp;
517 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
518 abi_ulong entry, toc;
519 #endif
520
521 _regs->gpr[1] = infop->start_stack;
522 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
523 entry = ldq_raw(infop->entry) + infop->load_addr;
524 toc = ldq_raw(infop->entry + 8) + infop->load_addr;
525 _regs->gpr[2] = toc;
526 infop->entry = entry;
527 #endif
528 _regs->nip = infop->entry;
529 /* Note that isn't exactly what regular kernel does
530 * but this is what the ABI wants and is needed to allow
531 * execution of PPC BSD programs.
532 */
533 /* FIXME - what to for failure of get_user()? */
534 get_user_ual(_regs->gpr[3], pos);
535 pos += sizeof(abi_ulong);
536 _regs->gpr[4] = pos;
537 for (tmp = 1; tmp != 0; pos += sizeof(abi_ulong))
538 tmp = ldl(pos);
539 _regs->gpr[5] = pos;
540 }
541
542 /* See linux kernel: arch/powerpc/include/asm/elf.h. */
543 #define ELF_NREG 48
544 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
545
546 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
547 {
548 int i;
549 target_ulong ccr = 0;
550
551 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
552 (*regs)[i] = tswapl(env->gpr[i]);
553 }
554
555 (*regs)[32] = tswapl(env->nip);
556 (*regs)[33] = tswapl(env->msr);
557 (*regs)[35] = tswapl(env->ctr);
558 (*regs)[36] = tswapl(env->lr);
559 (*regs)[37] = tswapl(env->xer);
560
561 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
562 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
563 }
564 (*regs)[38] = tswapl(ccr);
565 }
566
567 #define USE_ELF_CORE_DUMP
568 #define ELF_EXEC_PAGESIZE 4096
569
570 #endif
571
572 #ifdef TARGET_MIPS
573
574 #define ELF_START_MMAP 0x80000000
575
576 #define elf_check_arch(x) ( (x) == EM_MIPS )
577
578 #ifdef TARGET_MIPS64
579 #define ELF_CLASS ELFCLASS64
580 #else
581 #define ELF_CLASS ELFCLASS32
582 #endif
583 #ifdef TARGET_WORDS_BIGENDIAN
584 #define ELF_DATA ELFDATA2MSB
585 #else
586 #define ELF_DATA ELFDATA2LSB
587 #endif
588 #define ELF_ARCH EM_MIPS
589
590 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
591 {
592 regs->cp0_status = 2 << CP0St_KSU;
593 regs->cp0_epc = infop->entry;
594 regs->regs[29] = infop->start_stack;
595 }
596
597 /* See linux kernel: arch/mips/include/asm/elf.h. */
598 #define ELF_NREG 45
599 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
600
601 /* See linux kernel: arch/mips/include/asm/reg.h. */
602 enum {
603 #ifdef TARGET_MIPS64
604 TARGET_EF_R0 = 0,
605 #else
606 TARGET_EF_R0 = 6,
607 #endif
608 TARGET_EF_R26 = TARGET_EF_R0 + 26,
609 TARGET_EF_R27 = TARGET_EF_R0 + 27,
610 TARGET_EF_LO = TARGET_EF_R0 + 32,
611 TARGET_EF_HI = TARGET_EF_R0 + 33,
612 TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
613 TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
614 TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
615 TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
616 };
617
618 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
619 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
620 {
621 int i;
622
623 for (i = 0; i < TARGET_EF_R0; i++) {
624 (*regs)[i] = 0;
625 }
626 (*regs)[TARGET_EF_R0] = 0;
627
628 for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
629 (*regs)[TARGET_EF_R0 + i] = tswapl(env->active_tc.gpr[i]);
630 }
631
632 (*regs)[TARGET_EF_R26] = 0;
633 (*regs)[TARGET_EF_R27] = 0;
634 (*regs)[TARGET_EF_LO] = tswapl(env->active_tc.LO[0]);
635 (*regs)[TARGET_EF_HI] = tswapl(env->active_tc.HI[0]);
636 (*regs)[TARGET_EF_CP0_EPC] = tswapl(env->active_tc.PC);
637 (*regs)[TARGET_EF_CP0_BADVADDR] = tswapl(env->CP0_BadVAddr);
638 (*regs)[TARGET_EF_CP0_STATUS] = tswapl(env->CP0_Status);
639 (*regs)[TARGET_EF_CP0_CAUSE] = tswapl(env->CP0_Cause);
640 }
641
642 #define USE_ELF_CORE_DUMP
643 #define ELF_EXEC_PAGESIZE 4096
644
645 #endif /* TARGET_MIPS */
646
647 #ifdef TARGET_MICROBLAZE
648
649 #define ELF_START_MMAP 0x80000000
650
651 #define elf_check_arch(x) ( (x) == EM_XILINX_MICROBLAZE )
652
653 #define ELF_CLASS ELFCLASS32
654 #define ELF_DATA ELFDATA2MSB
655 #define ELF_ARCH EM_MIPS
656
657 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
658 {
659 regs->pc = infop->entry;
660 regs->r1 = infop->start_stack;
661
662 }
663
664 #define ELF_EXEC_PAGESIZE 4096
665
666 #endif /* TARGET_MICROBLAZE */
667
668 #ifdef TARGET_SH4
669
670 #define ELF_START_MMAP 0x80000000
671
672 #define elf_check_arch(x) ( (x) == EM_SH )
673
674 #define ELF_CLASS ELFCLASS32
675 #define ELF_DATA ELFDATA2LSB
676 #define ELF_ARCH EM_SH
677
678 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
679 {
680 /* Check other registers XXXXX */
681 regs->pc = infop->entry;
682 regs->regs[15] = infop->start_stack;
683 }
684
685 /* See linux kernel: arch/sh/include/asm/elf.h. */
686 #define ELF_NREG 23
687 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
688
689 /* See linux kernel: arch/sh/include/asm/ptrace.h. */
690 enum {
691 TARGET_REG_PC = 16,
692 TARGET_REG_PR = 17,
693 TARGET_REG_SR = 18,
694 TARGET_REG_GBR = 19,
695 TARGET_REG_MACH = 20,
696 TARGET_REG_MACL = 21,
697 TARGET_REG_SYSCALL = 22
698 };
699
700 static inline void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
701 {
702 int i;
703
704 for (i = 0; i < 16; i++) {
705 (*regs[i]) = tswapl(env->gregs[i]);
706 }
707
708 (*regs)[TARGET_REG_PC] = tswapl(env->pc);
709 (*regs)[TARGET_REG_PR] = tswapl(env->pr);
710 (*regs)[TARGET_REG_SR] = tswapl(env->sr);
711 (*regs)[TARGET_REG_GBR] = tswapl(env->gbr);
712 (*regs)[TARGET_REG_MACH] = tswapl(env->mach);
713 (*regs)[TARGET_REG_MACL] = tswapl(env->macl);
714 (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
715 }
716
717 #define USE_ELF_CORE_DUMP
718 #define ELF_EXEC_PAGESIZE 4096
719
720 #endif
721
722 #ifdef TARGET_CRIS
723
724 #define ELF_START_MMAP 0x80000000
725
726 #define elf_check_arch(x) ( (x) == EM_CRIS )
727
728 #define ELF_CLASS ELFCLASS32
729 #define ELF_DATA ELFDATA2LSB
730 #define ELF_ARCH EM_CRIS
731
732 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
733 {
734 regs->erp = infop->entry;
735 }
736
737 #define ELF_EXEC_PAGESIZE 8192
738
739 #endif
740
741 #ifdef TARGET_M68K
742
743 #define ELF_START_MMAP 0x80000000
744
745 #define elf_check_arch(x) ( (x) == EM_68K )
746
747 #define ELF_CLASS ELFCLASS32
748 #define ELF_DATA ELFDATA2MSB
749 #define ELF_ARCH EM_68K
750
751 /* ??? Does this need to do anything?
752 #define ELF_PLAT_INIT(_r) */
753
754 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
755 {
756 regs->usp = infop->start_stack;
757 regs->sr = 0;
758 regs->pc = infop->entry;
759 }
760
761 /* See linux kernel: arch/m68k/include/asm/elf.h. */
762 #define ELF_NREG 20
763 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
764
765 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
766 {
767 (*regs)[0] = tswapl(env->dregs[1]);
768 (*regs)[1] = tswapl(env->dregs[2]);
769 (*regs)[2] = tswapl(env->dregs[3]);
770 (*regs)[3] = tswapl(env->dregs[4]);
771 (*regs)[4] = tswapl(env->dregs[5]);
772 (*regs)[5] = tswapl(env->dregs[6]);
773 (*regs)[6] = tswapl(env->dregs[7]);
774 (*regs)[7] = tswapl(env->aregs[0]);
775 (*regs)[8] = tswapl(env->aregs[1]);
776 (*regs)[9] = tswapl(env->aregs[2]);
777 (*regs)[10] = tswapl(env->aregs[3]);
778 (*regs)[11] = tswapl(env->aregs[4]);
779 (*regs)[12] = tswapl(env->aregs[5]);
780 (*regs)[13] = tswapl(env->aregs[6]);
781 (*regs)[14] = tswapl(env->dregs[0]);
782 (*regs)[15] = tswapl(env->aregs[7]);
783 (*regs)[16] = tswapl(env->dregs[0]); /* FIXME: orig_d0 */
784 (*regs)[17] = tswapl(env->sr);
785 (*regs)[18] = tswapl(env->pc);
786 (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
787 }
788
789 #define USE_ELF_CORE_DUMP
790 #define ELF_EXEC_PAGESIZE 8192
791
792 #endif
793
794 #ifdef TARGET_ALPHA
795
796 #define ELF_START_MMAP (0x30000000000ULL)
797
798 #define elf_check_arch(x) ( (x) == ELF_ARCH )
799
800 #define ELF_CLASS ELFCLASS64
801 #define ELF_DATA ELFDATA2MSB
802 #define ELF_ARCH EM_ALPHA
803
804 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
805 {
806 regs->pc = infop->entry;
807 regs->ps = 8;
808 regs->usp = infop->start_stack;
809 }
810
811 #define ELF_EXEC_PAGESIZE 8192
812
813 #endif /* TARGET_ALPHA */
814
815 #ifndef ELF_PLATFORM
816 #define ELF_PLATFORM (NULL)
817 #endif
818
819 #ifndef ELF_HWCAP
820 #define ELF_HWCAP 0
821 #endif
822
823 #ifdef TARGET_ABI32
824 #undef ELF_CLASS
825 #define ELF_CLASS ELFCLASS32
826 #undef bswaptls
827 #define bswaptls(ptr) bswap32s(ptr)
828 #endif
829
830 #include "elf.h"
831
832 struct exec
833 {
834 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
835 unsigned int a_text; /* length of text, in bytes */
836 unsigned int a_data; /* length of data, in bytes */
837 unsigned int a_bss; /* length of uninitialized data area, in bytes */
838 unsigned int a_syms; /* length of symbol table data in file, in bytes */
839 unsigned int a_entry; /* start address */
840 unsigned int a_trsize; /* length of relocation info for text, in bytes */
841 unsigned int a_drsize; /* length of relocation info for data, in bytes */
842 };
843
844
845 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
846 #define OMAGIC 0407
847 #define NMAGIC 0410
848 #define ZMAGIC 0413
849 #define QMAGIC 0314
850
851 /* max code+data+bss space allocated to elf interpreter */
852 #define INTERP_MAP_SIZE (32 * 1024 * 1024)
853
854 /* max code+data+bss+brk space allocated to ET_DYN executables */
855 #define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
856
857 /* Necessary parameters */
858 #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
859 #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1))
860 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
861
862 #define INTERPRETER_NONE 0
863 #define INTERPRETER_AOUT 1
864 #define INTERPRETER_ELF 2
865
866 #define DLINFO_ITEMS 12
867
868 static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
869 {
870 memcpy(to, from, n);
871 }
872
873 static int load_aout_interp(void * exptr, int interp_fd);
874
875 #ifdef BSWAP_NEEDED
876 static void bswap_ehdr(struct elfhdr *ehdr)
877 {
878 bswap16s(&ehdr->e_type); /* Object file type */
879 bswap16s(&ehdr->e_machine); /* Architecture */
880 bswap32s(&ehdr->e_version); /* Object file version */
881 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
882 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
883 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
884 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
885 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
886 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
887 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
888 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
889 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
890 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
891 }
892
893 static void bswap_phdr(struct elf_phdr *phdr)
894 {
895 bswap32s(&phdr->p_type); /* Segment type */
896 bswaptls(&phdr->p_offset); /* Segment file offset */
897 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
898 bswaptls(&phdr->p_paddr); /* Segment physical address */
899 bswaptls(&phdr->p_filesz); /* Segment size in file */
900 bswaptls(&phdr->p_memsz); /* Segment size in memory */
901 bswap32s(&phdr->p_flags); /* Segment flags */
902 bswaptls(&phdr->p_align); /* Segment alignment */
903 }
904
905 static void bswap_shdr(struct elf_shdr *shdr)
906 {
907 bswap32s(&shdr->sh_name);
908 bswap32s(&shdr->sh_type);
909 bswaptls(&shdr->sh_flags);
910 bswaptls(&shdr->sh_addr);
911 bswaptls(&shdr->sh_offset);
912 bswaptls(&shdr->sh_size);
913 bswap32s(&shdr->sh_link);
914 bswap32s(&shdr->sh_info);
915 bswaptls(&shdr->sh_addralign);
916 bswaptls(&shdr->sh_entsize);
917 }
918
919 static void bswap_sym(struct elf_sym *sym)
920 {
921 bswap32s(&sym->st_name);
922 bswaptls(&sym->st_value);
923 bswaptls(&sym->st_size);
924 bswap16s(&sym->st_shndx);
925 }
926 #endif
927
928 #ifdef USE_ELF_CORE_DUMP
929 static int elf_core_dump(int, const CPUState *);
930
931 #ifdef BSWAP_NEEDED
932 static void bswap_note(struct elf_note *en)
933 {
934 bswap32s(&en->n_namesz);
935 bswap32s(&en->n_descsz);
936 bswap32s(&en->n_type);
937 }
938 #endif /* BSWAP_NEEDED */
939
940 #endif /* USE_ELF_CORE_DUMP */
941
942 /*
943 * 'copy_elf_strings()' copies argument/envelope strings from user
944 * memory to free pages in kernel mem. These are in a format ready
945 * to be put directly into the top of new user memory.
946 *
947 */
948 static abi_ulong copy_elf_strings(int argc,char ** argv, void **page,
949 abi_ulong p)
950 {
951 char *tmp, *tmp1, *pag = NULL;
952 int len, offset = 0;
953
954 if (!p) {
955 return 0; /* bullet-proofing */
956 }
957 while (argc-- > 0) {
958 tmp = argv[argc];
959 if (!tmp) {
960 fprintf(stderr, "VFS: argc is wrong");
961 exit(-1);
962 }
963 tmp1 = tmp;
964 while (*tmp++);
965 len = tmp - tmp1;
966 if (p < len) { /* this shouldn't happen - 128kB */
967 return 0;
968 }
969 while (len) {
970 --p; --tmp; --len;
971 if (--offset < 0) {
972 offset = p % TARGET_PAGE_SIZE;
973 pag = (char *)page[p/TARGET_PAGE_SIZE];
974 if (!pag) {
975 pag = (char *)malloc(TARGET_PAGE_SIZE);
976 memset(pag, 0, TARGET_PAGE_SIZE);
977 page[p/TARGET_PAGE_SIZE] = pag;
978 if (!pag)
979 return 0;
980 }
981 }
982 if (len == 0 || offset == 0) {
983 *(pag + offset) = *tmp;
984 }
985 else {
986 int bytes_to_copy = (len > offset) ? offset : len;
987 tmp -= bytes_to_copy;
988 p -= bytes_to_copy;
989 offset -= bytes_to_copy;
990 len -= bytes_to_copy;
991 memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
992 }
993 }
994 }
995 return p;
996 }
997
998 static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm,
999 struct image_info *info)
1000 {
1001 abi_ulong stack_base, size, error;
1002 int i;
1003
1004 /* Create enough stack to hold everything. If we don't use
1005 * it for args, we'll use it for something else...
1006 */
1007 size = x86_stack_size;
1008 if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE)
1009 size = MAX_ARG_PAGES*TARGET_PAGE_SIZE;
1010 error = target_mmap(0,
1011 size + qemu_host_page_size,
1012 PROT_READ | PROT_WRITE,
1013 MAP_PRIVATE | MAP_ANONYMOUS,
1014 -1, 0);
1015 if (error == -1) {
1016 perror("stk mmap");
1017 exit(-1);
1018 }
1019 /* we reserve one extra page at the top of the stack as guard */
1020 target_mprotect(error + size, qemu_host_page_size, PROT_NONE);
1021
1022 stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
1023 p += stack_base;
1024
1025 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1026 if (bprm->page[i]) {
1027 info->rss++;
1028 /* FIXME - check return value of memcpy_to_target() for failure */
1029 memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE);
1030 free(bprm->page[i]);
1031 }
1032 stack_base += TARGET_PAGE_SIZE;
1033 }
1034 return p;
1035 }
1036
1037 static void set_brk(abi_ulong start, abi_ulong end)
1038 {
1039 /* page-align the start and end addresses... */
1040 start = HOST_PAGE_ALIGN(start);
1041 end = HOST_PAGE_ALIGN(end);
1042 if (end <= start)
1043 return;
1044 if(target_mmap(start, end - start,
1045 PROT_READ | PROT_WRITE | PROT_EXEC,
1046 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0) == -1) {
1047 perror("cannot mmap brk");
1048 exit(-1);
1049 }
1050 }
1051
1052
1053 /* We need to explicitly zero any fractional pages after the data
1054 section (i.e. bss). This would contain the junk from the file that
1055 should not be in memory. */
1056 static void padzero(abi_ulong elf_bss, abi_ulong last_bss)
1057 {
1058 abi_ulong nbyte;
1059
1060 if (elf_bss >= last_bss)
1061 return;
1062
1063 /* XXX: this is really a hack : if the real host page size is
1064 smaller than the target page size, some pages after the end
1065 of the file may not be mapped. A better fix would be to
1066 patch target_mmap(), but it is more complicated as the file
1067 size must be known */
1068 if (qemu_real_host_page_size < qemu_host_page_size) {
1069 abi_ulong end_addr, end_addr1;
1070 end_addr1 = (elf_bss + qemu_real_host_page_size - 1) &
1071 ~(qemu_real_host_page_size - 1);
1072 end_addr = HOST_PAGE_ALIGN(elf_bss);
1073 if (end_addr1 < end_addr) {
1074 mmap((void *)g2h(end_addr1), end_addr - end_addr1,
1075 PROT_READ|PROT_WRITE|PROT_EXEC,
1076 MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
1077 }
1078 }
1079
1080 nbyte = elf_bss & (qemu_host_page_size-1);
1081 if (nbyte) {
1082 nbyte = qemu_host_page_size - nbyte;
1083 do {
1084 /* FIXME - what to do if put_user() fails? */
1085 put_user_u8(0, elf_bss);
1086 elf_bss++;
1087 } while (--nbyte);
1088 }
1089 }
1090
1091
1092 static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
1093 struct elfhdr * exec,
1094 abi_ulong load_addr,
1095 abi_ulong load_bias,
1096 abi_ulong interp_load_addr, int ibcs,
1097 struct image_info *info)
1098 {
1099 abi_ulong sp;
1100 int size;
1101 abi_ulong u_platform;
1102 const char *k_platform;
1103 const int n = sizeof(elf_addr_t);
1104
1105 sp = p;
1106 u_platform = 0;
1107 k_platform = ELF_PLATFORM;
1108 if (k_platform) {
1109 size_t len = strlen(k_platform) + 1;
1110 sp -= (len + n - 1) & ~(n - 1);
1111 u_platform = sp;
1112 /* FIXME - check return value of memcpy_to_target() for failure */
1113 memcpy_to_target(sp, k_platform, len);
1114 }
1115 /*
1116 * Force 16 byte _final_ alignment here for generality.
1117 */
1118 sp = sp &~ (abi_ulong)15;
1119 size = (DLINFO_ITEMS + 1) * 2;
1120 if (k_platform)
1121 size += 2;
1122 #ifdef DLINFO_ARCH_ITEMS
1123 size += DLINFO_ARCH_ITEMS * 2;
1124 #endif
1125 size += envc + argc + 2;
1126 size += (!ibcs ? 3 : 1); /* argc itself */
1127 size *= n;
1128 if (size & 15)
1129 sp -= 16 - (size & 15);
1130
1131 /* This is correct because Linux defines
1132 * elf_addr_t as Elf32_Off / Elf64_Off
1133 */
1134 #define NEW_AUX_ENT(id, val) do { \
1135 sp -= n; put_user_ual(val, sp); \
1136 sp -= n; put_user_ual(id, sp); \
1137 } while(0)
1138
1139 NEW_AUX_ENT (AT_NULL, 0);
1140
1141 /* There must be exactly DLINFO_ITEMS entries here. */
1142 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff));
1143 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
1144 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
1145 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
1146 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr));
1147 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
1148 NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry);
1149 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
1150 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
1151 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
1152 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
1153 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
1154 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
1155 if (k_platform)
1156 NEW_AUX_ENT(AT_PLATFORM, u_platform);
1157 #ifdef ARCH_DLINFO
1158 /*
1159 * ARCH_DLINFO must come last so platform specific code can enforce
1160 * special alignment requirements on the AUXV if necessary (eg. PPC).
1161 */
1162 ARCH_DLINFO;
1163 #endif
1164 #undef NEW_AUX_ENT
1165
1166 info->saved_auxv = sp;
1167
1168 sp = loader_build_argptr(envc, argc, sp, p, !ibcs);
1169 return sp;
1170 }
1171
1172
1173 static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex,
1174 int interpreter_fd,
1175 abi_ulong *interp_load_addr)
1176 {
1177 struct elf_phdr *elf_phdata = NULL;
1178 struct elf_phdr *eppnt;
1179 abi_ulong load_addr = 0;
1180 int load_addr_set = 0;
1181 int retval;
1182 abi_ulong last_bss, elf_bss;
1183 abi_ulong error;
1184 int i;
1185
1186 elf_bss = 0;
1187 last_bss = 0;
1188 error = 0;
1189
1190 #ifdef BSWAP_NEEDED
1191 bswap_ehdr(interp_elf_ex);
1192 #endif
1193 /* First of all, some simple consistency checks */
1194 if ((interp_elf_ex->e_type != ET_EXEC &&
1195 interp_elf_ex->e_type != ET_DYN) ||
1196 !elf_check_arch(interp_elf_ex->e_machine)) {
1197 return ~((abi_ulong)0UL);
1198 }
1199
1200
1201 /* Now read in all of the header information */
1202
1203 if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE)
1204 return ~(abi_ulong)0UL;
1205
1206 elf_phdata = (struct elf_phdr *)
1207 malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
1208
1209 if (!elf_phdata)
1210 return ~((abi_ulong)0UL);
1211
1212 /*
1213 * If the size of this structure has changed, then punt, since
1214 * we will be doing the wrong thing.
1215 */
1216 if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) {
1217 free(elf_phdata);
1218 return ~((abi_ulong)0UL);
1219 }
1220
1221 retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET);
1222 if(retval >= 0) {
1223 retval = read(interpreter_fd,
1224 (char *) elf_phdata,
1225 sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
1226 }
1227 if (retval < 0) {
1228 perror("load_elf_interp");
1229 exit(-1);
1230 free (elf_phdata);
1231 return retval;
1232 }
1233 #ifdef BSWAP_NEEDED
1234 eppnt = elf_phdata;
1235 for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) {
1236 bswap_phdr(eppnt);
1237 }
1238 #endif
1239
1240 if (interp_elf_ex->e_type == ET_DYN) {
1241 /* in order to avoid hardcoding the interpreter load
1242 address in qemu, we allocate a big enough memory zone */
1243 error = target_mmap(0, INTERP_MAP_SIZE,
1244 PROT_NONE, MAP_PRIVATE | MAP_ANON,
1245 -1, 0);
1246 if (error == -1) {
1247 perror("mmap");
1248 exit(-1);
1249 }
1250 load_addr = error;
1251 load_addr_set = 1;
1252 }
1253
1254 eppnt = elf_phdata;
1255 for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++)
1256 if (eppnt->p_type == PT_LOAD) {
1257 int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
1258 int elf_prot = 0;
1259 abi_ulong vaddr = 0;
1260 abi_ulong k;
1261
1262 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
1263 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
1264 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
1265 if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) {
1266 elf_type |= MAP_FIXED;
1267 vaddr = eppnt->p_vaddr;
1268 }
1269 error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr),
1270 eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr),
1271 elf_prot,
1272 elf_type,
1273 interpreter_fd,
1274 eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr));
1275
1276 if (error == -1) {
1277 /* Real error */
1278 close(interpreter_fd);
1279 free(elf_phdata);
1280 return ~((abi_ulong)0UL);
1281 }
1282
1283 if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
1284 load_addr = error;
1285 load_addr_set = 1;
1286 }
1287
1288 /*
1289 * Find the end of the file mapping for this phdr, and keep
1290 * track of the largest address we see for this.
1291 */
1292 k = load_addr + eppnt->p_vaddr + eppnt->p_filesz;
1293 if (k > elf_bss) elf_bss = k;
1294
1295 /*
1296 * Do the same thing for the memory mapping - between
1297 * elf_bss and last_bss is the bss section.
1298 */
1299 k = load_addr + eppnt->p_memsz + eppnt->p_vaddr;
1300 if (k > last_bss) last_bss = k;
1301 }
1302
1303 /* Now use mmap to map the library into memory. */
1304
1305 close(interpreter_fd);
1306
1307 /*
1308 * Now fill out the bss section. First pad the last page up
1309 * to the page boundary, and then perform a mmap to make sure
1310 * that there are zeromapped pages up to and including the last
1311 * bss page.
1312 */
1313 padzero(elf_bss, last_bss);
1314 elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */
1315
1316 /* Map the last of the bss segment */
1317 if (last_bss > elf_bss) {
1318 target_mmap(elf_bss, last_bss-elf_bss,
1319 PROT_READ|PROT_WRITE|PROT_EXEC,
1320 MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
1321 }
1322 free(elf_phdata);
1323
1324 *interp_load_addr = load_addr;
1325 return ((abi_ulong) interp_elf_ex->e_entry) + load_addr;
1326 }
1327
1328 static int symfind(const void *s0, const void *s1)
1329 {
1330 struct elf_sym *key = (struct elf_sym *)s0;
1331 struct elf_sym *sym = (struct elf_sym *)s1;
1332 int result = 0;
1333 if (key->st_value < sym->st_value) {
1334 result = -1;
1335 } else if (key->st_value >= sym->st_value + sym->st_size) {
1336 result = 1;
1337 }
1338 return result;
1339 }
1340
1341 static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
1342 {
1343 #if ELF_CLASS == ELFCLASS32
1344 struct elf_sym *syms = s->disas_symtab.elf32;
1345 #else
1346 struct elf_sym *syms = s->disas_symtab.elf64;
1347 #endif
1348
1349 // binary search
1350 struct elf_sym key;
1351 struct elf_sym *sym;
1352
1353 key.st_value = orig_addr;
1354
1355 sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), symfind);
1356 if (sym != NULL) {
1357 return s->disas_strtab + sym->st_name;
1358 }
1359
1360 return "";
1361 }
1362
1363 /* FIXME: This should use elf_ops.h */
1364 static int symcmp(const void *s0, const void *s1)
1365 {
1366 struct elf_sym *sym0 = (struct elf_sym *)s0;
1367 struct elf_sym *sym1 = (struct elf_sym *)s1;
1368 return (sym0->st_value < sym1->st_value)
1369 ? -1
1370 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
1371 }
1372
1373 /* Best attempt to load symbols from this ELF object. */
1374 static void load_symbols(struct elfhdr *hdr, int fd)
1375 {
1376 unsigned int i, nsyms;
1377 struct elf_shdr sechdr, symtab, strtab;
1378 char *strings;
1379 struct syminfo *s;
1380 struct elf_sym *syms;
1381
1382 lseek(fd, hdr->e_shoff, SEEK_SET);
1383 for (i = 0; i < hdr->e_shnum; i++) {
1384 if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr))
1385 return;
1386 #ifdef BSWAP_NEEDED
1387 bswap_shdr(&sechdr);
1388 #endif
1389 if (sechdr.sh_type == SHT_SYMTAB) {
1390 symtab = sechdr;
1391 lseek(fd, hdr->e_shoff
1392 + sizeof(sechdr) * sechdr.sh_link, SEEK_SET);
1393 if (read(fd, &strtab, sizeof(strtab))
1394 != sizeof(strtab))
1395 return;
1396 #ifdef BSWAP_NEEDED
1397 bswap_shdr(&strtab);
1398 #endif
1399 goto found;
1400 }
1401 }
1402 return; /* Shouldn't happen... */
1403
1404 found:
1405 /* Now know where the strtab and symtab are. Snarf them. */
1406 s = malloc(sizeof(*s));
1407 syms = malloc(symtab.sh_size);
1408 if (!syms)
1409 return;
1410 s->disas_strtab = strings = malloc(strtab.sh_size);
1411 if (!s->disas_strtab)
1412 return;
1413
1414 lseek(fd, symtab.sh_offset, SEEK_SET);
1415 if (read(fd, syms, symtab.sh_size) != symtab.sh_size)
1416 return;
1417
1418 nsyms = symtab.sh_size / sizeof(struct elf_sym);
1419
1420 i = 0;
1421 while (i < nsyms) {
1422 #ifdef BSWAP_NEEDED
1423 bswap_sym(syms + i);
1424 #endif
1425 // Throw away entries which we do not need.
1426 if (syms[i].st_shndx == SHN_UNDEF ||
1427 syms[i].st_shndx >= SHN_LORESERVE ||
1428 ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
1429 nsyms--;
1430 if (i < nsyms) {
1431 syms[i] = syms[nsyms];
1432 }
1433 continue;
1434 }
1435 #if defined(TARGET_ARM) || defined (TARGET_MIPS)
1436 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
1437 syms[i].st_value &= ~(target_ulong)1;
1438 #endif
1439 i++;
1440 }
1441 syms = realloc(syms, nsyms * sizeof(*syms));
1442
1443 qsort(syms, nsyms, sizeof(*syms), symcmp);
1444
1445 lseek(fd, strtab.sh_offset, SEEK_SET);
1446 if (read(fd, strings, strtab.sh_size) != strtab.sh_size)
1447 return;
1448 s->disas_num_syms = nsyms;
1449 #if ELF_CLASS == ELFCLASS32
1450 s->disas_symtab.elf32 = syms;
1451 s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx;
1452 #else
1453 s->disas_symtab.elf64 = syms;
1454 s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx;
1455 #endif
1456 s->next = syminfos;
1457 syminfos = s;
1458 }
1459
1460 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
1461 struct image_info * info)
1462 {
1463 struct elfhdr elf_ex;
1464 struct elfhdr interp_elf_ex;
1465 struct exec interp_ex;
1466 int interpreter_fd = -1; /* avoid warning */
1467 abi_ulong load_addr, load_bias;
1468 int load_addr_set = 0;
1469 unsigned int interpreter_type = INTERPRETER_NONE;
1470 unsigned char ibcs2_interpreter;
1471 int i;
1472 abi_ulong mapped_addr;
1473 struct elf_phdr * elf_ppnt;
1474 struct elf_phdr *elf_phdata;
1475 abi_ulong elf_bss, k, elf_brk;
1476 int retval;
1477 char * elf_interpreter;
1478 abi_ulong elf_entry, interp_load_addr = 0;
1479 int status;
1480 abi_ulong start_code, end_code, start_data, end_data;
1481 abi_ulong reloc_func_desc = 0;
1482 abi_ulong elf_stack;
1483 char passed_fileno[6];
1484
1485 ibcs2_interpreter = 0;
1486 status = 0;
1487 load_addr = 0;
1488 load_bias = 0;
1489 elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */
1490 #ifdef BSWAP_NEEDED
1491 bswap_ehdr(&elf_ex);
1492 #endif
1493
1494 /* First of all, some simple consistency checks */
1495 if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
1496 (! elf_check_arch(elf_ex.e_machine))) {
1497 return -ENOEXEC;
1498 }
1499
1500 bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
1501 bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p);
1502 bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p);
1503 if (!bprm->p) {
1504 retval = -E2BIG;
1505 }
1506
1507 /* Now read in all of the header information */
1508 elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum);
1509 if (elf_phdata == NULL) {
1510 return -ENOMEM;
1511 }
1512
1513 retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET);
1514 if(retval > 0) {
1515 retval = read(bprm->fd, (char *) elf_phdata,
1516 elf_ex.e_phentsize * elf_ex.e_phnum);
1517 }
1518
1519 if (retval < 0) {
1520 perror("load_elf_binary");
1521 exit(-1);
1522 free (elf_phdata);
1523 return -errno;
1524 }
1525
1526 #ifdef BSWAP_NEEDED
1527 elf_ppnt = elf_phdata;
1528 for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) {
1529 bswap_phdr(elf_ppnt);
1530 }
1531 #endif
1532 elf_ppnt = elf_phdata;
1533
1534 elf_bss = 0;
1535 elf_brk = 0;
1536
1537
1538 elf_stack = ~((abi_ulong)0UL);
1539 elf_interpreter = NULL;
1540 start_code = ~((abi_ulong)0UL);
1541 end_code = 0;
1542 start_data = 0;
1543 end_data = 0;
1544 interp_ex.a_info = 0;
1545
1546 for(i=0;i < elf_ex.e_phnum; i++) {
1547 if (elf_ppnt->p_type == PT_INTERP) {
1548 if ( elf_interpreter != NULL )
1549 {
1550 free (elf_phdata);
1551 free(elf_interpreter);
1552 close(bprm->fd);
1553 return -EINVAL;
1554 }
1555
1556 /* This is the program interpreter used for
1557 * shared libraries - for now assume that this
1558 * is an a.out format binary
1559 */
1560
1561 elf_interpreter = (char *)malloc(elf_ppnt->p_filesz);
1562
1563 if (elf_interpreter == NULL) {
1564 free (elf_phdata);
1565 close(bprm->fd);
1566 return -ENOMEM;
1567 }
1568
1569 retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET);
1570 if(retval >= 0) {
1571 retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz);
1572 }
1573 if(retval < 0) {
1574 perror("load_elf_binary2");
1575 exit(-1);
1576 }
1577
1578 /* If the program interpreter is one of these two,
1579 then assume an iBCS2 image. Otherwise assume
1580 a native linux image. */
1581
1582 /* JRP - Need to add X86 lib dir stuff here... */
1583
1584 if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 ||
1585 strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) {
1586 ibcs2_interpreter = 1;
1587 }
1588
1589 #if 0
1590 printf("Using ELF interpreter %s\n", path(elf_interpreter));
1591 #endif
1592 if (retval >= 0) {
1593 retval = open(path(elf_interpreter), O_RDONLY);
1594 if(retval >= 0) {
1595 interpreter_fd = retval;
1596 }
1597 else {
1598 perror(elf_interpreter);
1599 exit(-1);
1600 /* retval = -errno; */
1601 }
1602 }
1603
1604 if (retval >= 0) {
1605 retval = lseek(interpreter_fd, 0, SEEK_SET);
1606 if(retval >= 0) {
1607 retval = read(interpreter_fd,bprm->buf,128);
1608 }
1609 }
1610 if (retval >= 0) {
1611 interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */
1612 interp_elf_ex = *((struct elfhdr *) bprm->buf); /* elf exec-header */
1613 }
1614 if (retval < 0) {
1615 perror("load_elf_binary3");
1616 exit(-1);
1617 free (elf_phdata);
1618 free(elf_interpreter);
1619 close(bprm->fd);
1620 return retval;
1621 }
1622 }
1623 elf_ppnt++;
1624 }
1625
1626 /* Some simple consistency checks for the interpreter */
1627 if (elf_interpreter){
1628 interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT;
1629
1630 /* Now figure out which format our binary is */
1631 if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) &&
1632 (N_MAGIC(interp_ex) != QMAGIC)) {
1633 interpreter_type = INTERPRETER_ELF;
1634 }
1635
1636 if (interp_elf_ex.e_ident[0] != 0x7f ||
1637 strncmp((char *)&interp_elf_ex.e_ident[1], "ELF",3) != 0) {
1638 interpreter_type &= ~INTERPRETER_ELF;
1639 }
1640
1641 if (!interpreter_type) {
1642 free(elf_interpreter);
1643 free(elf_phdata);
1644 close(bprm->fd);
1645 return -ELIBBAD;
1646 }
1647 }
1648
1649 /* OK, we are done with that, now set up the arg stuff,
1650 and then start this sucker up */
1651
1652 {
1653 char * passed_p;
1654
1655 if (interpreter_type == INTERPRETER_AOUT) {
1656 snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd);
1657 passed_p = passed_fileno;
1658
1659 if (elf_interpreter) {
1660 bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p);
1661 bprm->argc++;
1662 }
1663 }
1664 if (!bprm->p) {
1665 if (elf_interpreter) {
1666 free(elf_interpreter);
1667 }
1668 free (elf_phdata);
1669 close(bprm->fd);
1670 return -E2BIG;
1671 }
1672 }
1673
1674 /* OK, This is the point of no return */
1675 info->end_data = 0;
1676 info->end_code = 0;
1677 info->start_mmap = (abi_ulong)ELF_START_MMAP;
1678 info->mmap = 0;
1679 elf_entry = (abi_ulong) elf_ex.e_entry;
1680
1681 #if defined(CONFIG_USE_GUEST_BASE)
1682 /*
1683 * In case where user has not explicitly set the guest_base, we
1684 * probe here that should we set it automatically.
1685 */
1686 if (!have_guest_base) {
1687 /*
1688 * Go through ELF program header table and find out whether
1689 * any of the segments drop below our current mmap_min_addr and
1690 * in that case set guest_base to corresponding address.
1691 */
1692 for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum;
1693 i++, elf_ppnt++) {
1694 if (elf_ppnt->p_type != PT_LOAD)
1695 continue;
1696 if (HOST_PAGE_ALIGN(elf_ppnt->p_vaddr) < mmap_min_addr) {
1697 guest_base = HOST_PAGE_ALIGN(mmap_min_addr);
1698 break;
1699 }
1700 }
1701 }
1702 #endif /* CONFIG_USE_GUEST_BASE */
1703
1704 /* Do this so that we can load the interpreter, if need be. We will
1705 change some of these later */
1706 info->rss = 0;
1707 bprm->p = setup_arg_pages(bprm->p, bprm, info);
1708 info->start_stack = bprm->p;
1709
1710 /* Now we do a little grungy work by mmaping the ELF image into
1711 * the correct location in memory. At this point, we assume that
1712 * the image should be loaded at fixed address, not at a variable
1713 * address.
1714 */
1715
1716 for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) {
1717 int elf_prot = 0;
1718 int elf_flags = 0;
1719 abi_ulong error;
1720
1721 if (elf_ppnt->p_type != PT_LOAD)
1722 continue;
1723
1724 if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
1725 if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
1726 if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
1727 elf_flags = MAP_PRIVATE | MAP_DENYWRITE;
1728 if (elf_ex.e_type == ET_EXEC || load_addr_set) {
1729 elf_flags |= MAP_FIXED;
1730 } else if (elf_ex.e_type == ET_DYN) {
1731 /* Try and get dynamic programs out of the way of the default mmap
1732 base, as well as whatever program they might try to exec. This
1733 is because the brk will follow the loader, and is not movable. */
1734 /* NOTE: for qemu, we do a big mmap to get enough space
1735 without hardcoding any address */
1736 error = target_mmap(0, ET_DYN_MAP_SIZE,
1737 PROT_NONE, MAP_PRIVATE | MAP_ANON,
1738 -1, 0);
1739 if (error == -1) {
1740 perror("mmap");
1741 exit(-1);
1742 }
1743 load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr);
1744 }
1745
1746 error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr),
1747 (elf_ppnt->p_filesz +
1748 TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)),
1749 elf_prot,
1750 (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE),
1751 bprm->fd,
1752 (elf_ppnt->p_offset -
1753 TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)));
1754 if (error == -1) {
1755 perror("mmap");
1756 exit(-1);
1757 }
1758
1759 #ifdef LOW_ELF_STACK
1760 if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
1761 elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr);
1762 #endif
1763
1764 if (!load_addr_set) {
1765 load_addr_set = 1;
1766 load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset;
1767 if (elf_ex.e_type == ET_DYN) {
1768 load_bias += error -
1769 TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr);
1770 load_addr += load_bias;
1771 reloc_func_desc = load_bias;
1772 }
1773 }
1774 k = elf_ppnt->p_vaddr;
1775 if (k < start_code)
1776 start_code = k;
1777 if (start_data < k)
1778 start_data = k;
1779 k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz;
1780 if (k > elf_bss)
1781 elf_bss = k;
1782 if ((elf_ppnt->p_flags & PF_X) && end_code < k)
1783 end_code = k;
1784 if (end_data < k)
1785 end_data = k;
1786 k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz;
1787 if (k > elf_brk) elf_brk = k;
1788 }
1789
1790 elf_entry += load_bias;
1791 elf_bss += load_bias;
1792 elf_brk += load_bias;
1793 start_code += load_bias;
1794 end_code += load_bias;
1795 start_data += load_bias;
1796 end_data += load_bias;
1797
1798 if (elf_interpreter) {
1799 if (interpreter_type & 1) {
1800 elf_entry = load_aout_interp(&interp_ex, interpreter_fd);
1801 }
1802 else if (interpreter_type & 2) {
1803 elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd,
1804 &interp_load_addr);
1805 }
1806 reloc_func_desc = interp_load_addr;
1807
1808 close(interpreter_fd);
1809 free(elf_interpreter);
1810
1811 if (elf_entry == ~((abi_ulong)0UL)) {
1812 printf("Unable to load interpreter\n");
1813 free(elf_phdata);
1814 exit(-1);
1815 return 0;
1816 }
1817 }
1818
1819 free(elf_phdata);
1820
1821 if (qemu_log_enabled())
1822 load_symbols(&elf_ex, bprm->fd);
1823
1824 if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd);
1825 info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX);
1826
1827 #ifdef LOW_ELF_STACK
1828 info->start_stack = bprm->p = elf_stack - 4;
1829 #endif
1830 bprm->p = create_elf_tables(bprm->p,
1831 bprm->argc,
1832 bprm->envc,
1833 &elf_ex,
1834 load_addr, load_bias,
1835 interp_load_addr,
1836 (interpreter_type == INTERPRETER_AOUT ? 0 : 1),
1837 info);
1838 info->load_addr = reloc_func_desc;
1839 info->start_brk = info->brk = elf_brk;
1840 info->end_code = end_code;
1841 info->start_code = start_code;
1842 info->start_data = start_data;
1843 info->end_data = end_data;
1844 info->start_stack = bprm->p;
1845
1846 /* Calling set_brk effectively mmaps the pages that we need for the bss and break
1847 sections */
1848 set_brk(elf_bss, elf_brk);
1849
1850 padzero(elf_bss, elf_brk);
1851
1852 #if 0
1853 printf("(start_brk) %x\n" , info->start_brk);
1854 printf("(end_code) %x\n" , info->end_code);
1855 printf("(start_code) %x\n" , info->start_code);
1856 printf("(end_data) %x\n" , info->end_data);
1857 printf("(start_stack) %x\n" , info->start_stack);
1858 printf("(brk) %x\n" , info->brk);
1859 #endif
1860
1861 if ( info->personality == PER_SVR4 )
1862 {
1863 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
1864 and some applications "depend" upon this behavior.
1865 Since we do not have the power to recompile these, we
1866 emulate the SVr4 behavior. Sigh. */
1867 mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
1868 MAP_FIXED | MAP_PRIVATE, -1, 0);
1869 }
1870
1871 info->entry = elf_entry;
1872
1873 #ifdef USE_ELF_CORE_DUMP
1874 bprm->core_dump = &elf_core_dump;
1875 #endif
1876
1877 return 0;
1878 }
1879
1880 #ifdef USE_ELF_CORE_DUMP
1881
1882 /*
1883 * Definitions to generate Intel SVR4-like core files.
1884 * These mostly have the same names as the SVR4 types with "target_elf_"
1885 * tacked on the front to prevent clashes with linux definitions,
1886 * and the typedef forms have been avoided. This is mostly like
1887 * the SVR4 structure, but more Linuxy, with things that Linux does
1888 * not support and which gdb doesn't really use excluded.
1889 *
1890 * Fields we don't dump (their contents is zero) in linux-user qemu
1891 * are marked with XXX.
1892 *
1893 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
1894 *
1895 * Porting ELF coredump for target is (quite) simple process. First you
1896 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
1897 * the target resides):
1898 *
1899 * #define USE_ELF_CORE_DUMP
1900 *
1901 * Next you define type of register set used for dumping. ELF specification
1902 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
1903 *
1904 * typedef <target_regtype> target_elf_greg_t;
1905 * #define ELF_NREG <number of registers>
1906 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
1907 *
1908 * Last step is to implement target specific function that copies registers
1909 * from given cpu into just specified register set. Prototype is:
1910 *
1911 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
1912 * const CPUState *env);
1913 *
1914 * Parameters:
1915 * regs - copy register values into here (allocated and zeroed by caller)
1916 * env - copy registers from here
1917 *
1918 * Example for ARM target is provided in this file.
1919 */
1920
1921 /* An ELF note in memory */
1922 struct memelfnote {
1923 const char *name;
1924 size_t namesz;
1925 size_t namesz_rounded;
1926 int type;
1927 size_t datasz;
1928 void *data;
1929 size_t notesz;
1930 };
1931
1932 struct target_elf_siginfo {
1933 int si_signo; /* signal number */
1934 int si_code; /* extra code */
1935 int si_errno; /* errno */
1936 };
1937
1938 struct target_elf_prstatus {
1939 struct target_elf_siginfo pr_info; /* Info associated with signal */
1940 short pr_cursig; /* Current signal */
1941 target_ulong pr_sigpend; /* XXX */
1942 target_ulong pr_sighold; /* XXX */
1943 target_pid_t pr_pid;
1944 target_pid_t pr_ppid;
1945 target_pid_t pr_pgrp;
1946 target_pid_t pr_sid;
1947 struct target_timeval pr_utime; /* XXX User time */
1948 struct target_timeval pr_stime; /* XXX System time */
1949 struct target_timeval pr_cutime; /* XXX Cumulative user time */
1950 struct target_timeval pr_cstime; /* XXX Cumulative system time */
1951 target_elf_gregset_t pr_reg; /* GP registers */
1952 int pr_fpvalid; /* XXX */
1953 };
1954
1955 #define ELF_PRARGSZ (80) /* Number of chars for args */
1956
1957 struct target_elf_prpsinfo {
1958 char pr_state; /* numeric process state */
1959 char pr_sname; /* char for pr_state */
1960 char pr_zomb; /* zombie */
1961 char pr_nice; /* nice val */
1962 target_ulong pr_flag; /* flags */
1963 target_uid_t pr_uid;
1964 target_gid_t pr_gid;
1965 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
1966 /* Lots missing */
1967 char pr_fname[16]; /* filename of executable */
1968 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
1969 };
1970
1971 /* Here is the structure in which status of each thread is captured. */
1972 struct elf_thread_status {
1973 QTAILQ_ENTRY(elf_thread_status) ets_link;
1974 struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
1975 #if 0
1976 elf_fpregset_t fpu; /* NT_PRFPREG */
1977 struct task_struct *thread;
1978 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
1979 #endif
1980 struct memelfnote notes[1];
1981 int num_notes;
1982 };
1983
1984 struct elf_note_info {
1985 struct memelfnote *notes;
1986 struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
1987 struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
1988
1989 QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list;
1990 #if 0
1991 /*
1992 * Current version of ELF coredump doesn't support
1993 * dumping fp regs etc.
1994 */
1995 elf_fpregset_t *fpu;
1996 elf_fpxregset_t *xfpu;
1997 int thread_status_size;
1998 #endif
1999 int notes_size;
2000 int numnote;
2001 };
2002
2003 struct vm_area_struct {
2004 abi_ulong vma_start; /* start vaddr of memory region */
2005 abi_ulong vma_end; /* end vaddr of memory region */
2006 abi_ulong vma_flags; /* protection etc. flags for the region */
2007 QTAILQ_ENTRY(vm_area_struct) vma_link;
2008 };
2009
2010 struct mm_struct {
2011 QTAILQ_HEAD(, vm_area_struct) mm_mmap;
2012 int mm_count; /* number of mappings */
2013 };
2014
2015 static struct mm_struct *vma_init(void);
2016 static void vma_delete(struct mm_struct *);
2017 static int vma_add_mapping(struct mm_struct *, abi_ulong,
2018 abi_ulong, abi_ulong);
2019 static int vma_get_mapping_count(const struct mm_struct *);
2020 static struct vm_area_struct *vma_first(const struct mm_struct *);
2021 static struct vm_area_struct *vma_next(struct vm_area_struct *);
2022 static abi_ulong vma_dump_size(const struct vm_area_struct *);
2023 static int vma_walker(void *priv, unsigned long start, unsigned long end,
2024 unsigned long flags);
2025
2026 static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
2027 static void fill_note(struct memelfnote *, const char *, int,
2028 unsigned int, void *);
2029 static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
2030 static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
2031 static void fill_auxv_note(struct memelfnote *, const TaskState *);
2032 static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
2033 static size_t note_size(const struct memelfnote *);
2034 static void free_note_info(struct elf_note_info *);
2035 static int fill_note_info(struct elf_note_info *, long, const CPUState *);
2036 static void fill_thread_info(struct elf_note_info *, const CPUState *);
2037 static int core_dump_filename(const TaskState *, char *, size_t);
2038
2039 static int dump_write(int, const void *, size_t);
2040 static int write_note(struct memelfnote *, int);
2041 static int write_note_info(struct elf_note_info *, int);
2042
2043 #ifdef BSWAP_NEEDED
2044 static void bswap_prstatus(struct target_elf_prstatus *);
2045 static void bswap_psinfo(struct target_elf_prpsinfo *);
2046
2047 static void bswap_prstatus(struct target_elf_prstatus *prstatus)
2048 {
2049 prstatus->pr_info.si_signo = tswapl(prstatus->pr_info.si_signo);
2050 prstatus->pr_info.si_code = tswapl(prstatus->pr_info.si_code);
2051 prstatus->pr_info.si_errno = tswapl(prstatus->pr_info.si_errno);
2052 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
2053 prstatus->pr_sigpend = tswapl(prstatus->pr_sigpend);
2054 prstatus->pr_sighold = tswapl(prstatus->pr_sighold);
2055 prstatus->pr_pid = tswap32(prstatus->pr_pid);
2056 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
2057 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
2058 prstatus->pr_sid = tswap32(prstatus->pr_sid);
2059 /* cpu times are not filled, so we skip them */
2060 /* regs should be in correct format already */
2061 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
2062 }
2063
2064 static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
2065 {
2066 psinfo->pr_flag = tswapl(psinfo->pr_flag);
2067 psinfo->pr_uid = tswap16(psinfo->pr_uid);
2068 psinfo->pr_gid = tswap16(psinfo->pr_gid);
2069 psinfo->pr_pid = tswap32(psinfo->pr_pid);
2070 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
2071 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
2072 psinfo->pr_sid = tswap32(psinfo->pr_sid);
2073 }
2074 #endif /* BSWAP_NEEDED */
2075
2076 /*
2077 * Minimal support for linux memory regions. These are needed
2078 * when we are finding out what memory exactly belongs to
2079 * emulated process. No locks needed here, as long as
2080 * thread that received the signal is stopped.
2081 */
2082
2083 static struct mm_struct *vma_init(void)
2084 {
2085 struct mm_struct *mm;
2086
2087 if ((mm = qemu_malloc(sizeof (*mm))) == NULL)
2088 return (NULL);
2089
2090 mm->mm_count = 0;
2091 QTAILQ_INIT(&mm->mm_mmap);
2092
2093 return (mm);
2094 }
2095
2096 static void vma_delete(struct mm_struct *mm)
2097 {
2098 struct vm_area_struct *vma;
2099
2100 while ((vma = vma_first(mm)) != NULL) {
2101 QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
2102 qemu_free(vma);
2103 }
2104 qemu_free(mm);
2105 }
2106
2107 static int vma_add_mapping(struct mm_struct *mm, abi_ulong start,
2108 abi_ulong end, abi_ulong flags)
2109 {
2110 struct vm_area_struct *vma;
2111
2112 if ((vma = qemu_mallocz(sizeof (*vma))) == NULL)
2113 return (-1);
2114
2115 vma->vma_start = start;
2116 vma->vma_end = end;
2117 vma->vma_flags = flags;
2118
2119 QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
2120 mm->mm_count++;
2121
2122 return (0);
2123 }
2124
2125 static struct vm_area_struct *vma_first(const struct mm_struct *mm)
2126 {
2127 return (QTAILQ_FIRST(&mm->mm_mmap));
2128 }
2129
2130 static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
2131 {
2132 return (QTAILQ_NEXT(vma, vma_link));
2133 }
2134
2135 static int vma_get_mapping_count(const struct mm_struct *mm)
2136 {
2137 return (mm->mm_count);
2138 }
2139
2140 /*
2141 * Calculate file (dump) size of given memory region.
2142 */
2143 static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
2144 {
2145 /* if we cannot even read the first page, skip it */
2146 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
2147 return (0);
2148
2149 /*
2150 * Usually we don't dump executable pages as they contain
2151 * non-writable code that debugger can read directly from
2152 * target library etc. However, thread stacks are marked
2153 * also executable so we read in first page of given region
2154 * and check whether it contains elf header. If there is
2155 * no elf header, we dump it.
2156 */
2157 if (vma->vma_flags & PROT_EXEC) {
2158 char page[TARGET_PAGE_SIZE];
2159
2160 copy_from_user(page, vma->vma_start, sizeof (page));
2161 if ((page[EI_MAG0] == ELFMAG0) &&
2162 (page[EI_MAG1] == ELFMAG1) &&
2163 (page[EI_MAG2] == ELFMAG2) &&
2164 (page[EI_MAG3] == ELFMAG3)) {
2165 /*
2166 * Mappings are possibly from ELF binary. Don't dump
2167 * them.
2168 */
2169 return (0);
2170 }
2171 }
2172
2173 return (vma->vma_end - vma->vma_start);
2174 }
2175
2176 static int vma_walker(void *priv, unsigned long start, unsigned long end,
2177 unsigned long flags)
2178 {
2179 struct mm_struct *mm = (struct mm_struct *)priv;
2180
2181 /*
2182 * Don't dump anything that qemu has reserved for internal use.
2183 */
2184 if (flags & PAGE_RESERVED)
2185 return (0);
2186
2187 vma_add_mapping(mm, start, end, flags);
2188 return (0);
2189 }
2190
2191 static void fill_note(struct memelfnote *note, const char *name, int type,
2192 unsigned int sz, void *data)
2193 {
2194 unsigned int namesz;
2195
2196 namesz = strlen(name) + 1;
2197 note->name = name;
2198 note->namesz = namesz;
2199 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
2200 note->type = type;
2201 note->datasz = roundup(sz, sizeof (int32_t));;
2202 note->data = data;
2203
2204 /*
2205 * We calculate rounded up note size here as specified by
2206 * ELF document.
2207 */
2208 note->notesz = sizeof (struct elf_note) +
2209 note->namesz_rounded + note->datasz;
2210 }
2211
2212 static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
2213 uint32_t flags)
2214 {
2215 (void) memset(elf, 0, sizeof(*elf));
2216
2217 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
2218 elf->e_ident[EI_CLASS] = ELF_CLASS;
2219 elf->e_ident[EI_DATA] = ELF_DATA;
2220 elf->e_ident[EI_VERSION] = EV_CURRENT;
2221 elf->e_ident[EI_OSABI] = ELF_OSABI;
2222
2223 elf->e_type = ET_CORE;
2224 elf->e_machine = machine;
2225 elf->e_version = EV_CURRENT;
2226 elf->e_phoff = sizeof(struct elfhdr);
2227 elf->e_flags = flags;
2228 elf->e_ehsize = sizeof(struct elfhdr);
2229 elf->e_phentsize = sizeof(struct elf_phdr);
2230 elf->e_phnum = segs;
2231
2232 #ifdef BSWAP_NEEDED
2233 bswap_ehdr(elf);
2234 #endif
2235 }
2236
2237 static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
2238 {
2239 phdr->p_type = PT_NOTE;
2240 phdr->p_offset = offset;
2241 phdr->p_vaddr = 0;
2242 phdr->p_paddr = 0;
2243 phdr->p_filesz = sz;
2244 phdr->p_memsz = 0;
2245 phdr->p_flags = 0;
2246 phdr->p_align = 0;
2247
2248 #ifdef BSWAP_NEEDED
2249 bswap_phdr(phdr);
2250 #endif
2251 }
2252
2253 static size_t note_size(const struct memelfnote *note)
2254 {
2255 return (note->notesz);
2256 }
2257
2258 static void fill_prstatus(struct target_elf_prstatus *prstatus,
2259 const TaskState *ts, int signr)
2260 {
2261 (void) memset(prstatus, 0, sizeof (*prstatus));
2262 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
2263 prstatus->pr_pid = ts->ts_tid;
2264 prstatus->pr_ppid = getppid();
2265 prstatus->pr_pgrp = getpgrp();
2266 prstatus->pr_sid = getsid(0);
2267
2268 #ifdef BSWAP_NEEDED
2269 bswap_prstatus(prstatus);
2270 #endif
2271 }
2272
2273 static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
2274 {
2275 char *filename, *base_filename;
2276 unsigned int i, len;
2277
2278 (void) memset(psinfo, 0, sizeof (*psinfo));
2279
2280 len = ts->info->arg_end - ts->info->arg_start;
2281 if (len >= ELF_PRARGSZ)
2282 len = ELF_PRARGSZ - 1;
2283 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
2284 return -EFAULT;
2285 for (i = 0; i < len; i++)
2286 if (psinfo->pr_psargs[i] == 0)
2287 psinfo->pr_psargs[i] = ' ';
2288 psinfo->pr_psargs[len] = 0;
2289
2290 psinfo->pr_pid = getpid();
2291 psinfo->pr_ppid = getppid();
2292 psinfo->pr_pgrp = getpgrp();
2293 psinfo->pr_sid = getsid(0);
2294 psinfo->pr_uid = getuid();
2295 psinfo->pr_gid = getgid();
2296
2297 filename = strdup(ts->bprm->filename);
2298 base_filename = strdup(basename(filename));
2299 (void) strncpy(psinfo->pr_fname, base_filename,
2300 sizeof(psinfo->pr_fname));
2301 free(base_filename);
2302 free(filename);
2303
2304 #ifdef BSWAP_NEEDED
2305 bswap_psinfo(psinfo);
2306 #endif
2307 return (0);
2308 }
2309
2310 static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
2311 {
2312 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
2313 elf_addr_t orig_auxv = auxv;
2314 abi_ulong val;
2315 void *ptr;
2316 int i, len;
2317
2318 /*
2319 * Auxiliary vector is stored in target process stack. It contains
2320 * {type, value} pairs that we need to dump into note. This is not
2321 * strictly necessary but we do it here for sake of completeness.
2322 */
2323
2324 /* find out lenght of the vector, AT_NULL is terminator */
2325 i = len = 0;
2326 do {
2327 get_user_ual(val, auxv);
2328 i += 2;
2329 auxv += 2 * sizeof (elf_addr_t);
2330 } while (val != AT_NULL);
2331 len = i * sizeof (elf_addr_t);
2332
2333 /* read in whole auxv vector and copy it to memelfnote */
2334 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
2335 if (ptr != NULL) {
2336 fill_note(note, "CORE", NT_AUXV, len, ptr);
2337 unlock_user(ptr, auxv, len);
2338 }
2339 }
2340
2341 /*
2342 * Constructs name of coredump file. We have following convention
2343 * for the name:
2344 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
2345 *
2346 * Returns 0 in case of success, -1 otherwise (errno is set).
2347 */
2348 static int core_dump_filename(const TaskState *ts, char *buf,
2349 size_t bufsize)
2350 {
2351 char timestamp[64];
2352 char *filename = NULL;
2353 char *base_filename = NULL;
2354 struct timeval tv;
2355 struct tm tm;
2356
2357 assert(bufsize >= PATH_MAX);
2358
2359 if (gettimeofday(&tv, NULL) < 0) {
2360 (void) fprintf(stderr, "unable to get current timestamp: %s",
2361 strerror(errno));
2362 return (-1);
2363 }
2364
2365 filename = strdup(ts->bprm->filename);
2366 base_filename = strdup(basename(filename));
2367 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
2368 localtime_r(&tv.tv_sec, &tm));
2369 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
2370 base_filename, timestamp, (int)getpid());
2371 free(base_filename);
2372 free(filename);
2373
2374 return (0);
2375 }
2376
2377 static int dump_write(int fd, const void *ptr, size_t size)
2378 {
2379 const char *bufp = (const char *)ptr;
2380 ssize_t bytes_written, bytes_left;
2381 struct rlimit dumpsize;
2382 off_t pos;
2383
2384 bytes_written = 0;
2385 getrlimit(RLIMIT_CORE, &dumpsize);
2386 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
2387 if (errno == ESPIPE) { /* not a seekable stream */
2388 bytes_left = size;
2389 } else {
2390 return pos;
2391 }
2392 } else {
2393 if (dumpsize.rlim_cur <= pos) {
2394 return -1;
2395 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
2396 bytes_left = size;
2397 } else {
2398 size_t limit_left=dumpsize.rlim_cur - pos;
2399 bytes_left = limit_left >= size ? size : limit_left ;
2400 }
2401 }
2402
2403 /*
2404 * In normal conditions, single write(2) should do but
2405 * in case of socket etc. this mechanism is more portable.
2406 */
2407 do {
2408 bytes_written = write(fd, bufp, bytes_left);
2409 if (bytes_written < 0) {
2410 if (errno == EINTR)
2411 continue;
2412 return (-1);
2413 } else if (bytes_written == 0) { /* eof */
2414 return (-1);
2415 }
2416 bufp += bytes_written;
2417 bytes_left -= bytes_written;
2418 } while (bytes_left > 0);
2419
2420 return (0);
2421 }
2422
2423 static int write_note(struct memelfnote *men, int fd)
2424 {
2425 struct elf_note en;
2426
2427 en.n_namesz = men->namesz;
2428 en.n_type = men->type;
2429 en.n_descsz = men->datasz;
2430
2431 #ifdef BSWAP_NEEDED
2432 bswap_note(&en);
2433 #endif
2434
2435 if (dump_write(fd, &en, sizeof(en)) != 0)
2436 return (-1);
2437 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
2438 return (-1);
2439 if (dump_write(fd, men->data, men->datasz) != 0)
2440 return (-1);
2441
2442 return (0);
2443 }
2444
2445 static void fill_thread_info(struct elf_note_info *info, const CPUState *env)
2446 {
2447 TaskState *ts = (TaskState *)env->opaque;
2448 struct elf_thread_status *ets;
2449
2450 ets = qemu_mallocz(sizeof (*ets));
2451 ets->num_notes = 1; /* only prstatus is dumped */
2452 fill_prstatus(&ets->prstatus, ts, 0);
2453 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
2454 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
2455 &ets->prstatus);
2456
2457 QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
2458
2459 info->notes_size += note_size(&ets->notes[0]);
2460 }
2461
2462 static int fill_note_info(struct elf_note_info *info,
2463 long signr, const CPUState *env)
2464 {
2465 #define NUMNOTES 3
2466 CPUState *cpu = NULL;
2467 TaskState *ts = (TaskState *)env->opaque;
2468 int i;
2469
2470 (void) memset(info, 0, sizeof (*info));
2471
2472 QTAILQ_INIT(&info->thread_list);
2473
2474 info->notes = qemu_mallocz(NUMNOTES * sizeof (struct memelfnote));
2475 if (info->notes == NULL)
2476 return (-ENOMEM);
2477 info->prstatus = qemu_mallocz(sizeof (*info->prstatus));
2478 if (info->prstatus == NULL)
2479 return (-ENOMEM);
2480 info->psinfo = qemu_mallocz(sizeof (*info->psinfo));
2481 if (info->prstatus == NULL)
2482 return (-ENOMEM);
2483
2484 /*
2485 * First fill in status (and registers) of current thread
2486 * including process info & aux vector.
2487 */
2488 fill_prstatus(info->prstatus, ts, signr);
2489 elf_core_copy_regs(&info->prstatus->pr_reg, env);
2490 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
2491 sizeof (*info->prstatus), info->prstatus);
2492 fill_psinfo(info->psinfo, ts);
2493 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
2494 sizeof (*info->psinfo), info->psinfo);
2495 fill_auxv_note(&info->notes[2], ts);
2496 info->numnote = 3;
2497
2498 info->notes_size = 0;
2499 for (i = 0; i < info->numnote; i++)
2500 info->notes_size += note_size(&info->notes[i]);
2501
2502 /* read and fill status of all threads */
2503 cpu_list_lock();
2504 for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) {
2505 if (cpu == thread_env)
2506 continue;
2507 fill_thread_info(info, cpu);
2508 }
2509 cpu_list_unlock();
2510
2511 return (0);
2512 }
2513
2514 static void free_note_info(struct elf_note_info *info)
2515 {
2516 struct elf_thread_status *ets;
2517
2518 while (!QTAILQ_EMPTY(&info->thread_list)) {
2519 ets = QTAILQ_FIRST(&info->thread_list);
2520 QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
2521 qemu_free(ets);
2522 }
2523
2524 qemu_free(info->prstatus);
2525 qemu_free(info->psinfo);
2526 qemu_free(info->notes);
2527 }
2528
2529 static int write_note_info(struct elf_note_info *info, int fd)
2530 {
2531 struct elf_thread_status *ets;
2532 int i, error = 0;
2533
2534 /* write prstatus, psinfo and auxv for current thread */
2535 for (i = 0; i < info->numnote; i++)
2536 if ((error = write_note(&info->notes[i], fd)) != 0)
2537 return (error);
2538
2539 /* write prstatus for each thread */
2540 for (ets = info->thread_list.tqh_first; ets != NULL;
2541 ets = ets->ets_link.tqe_next) {
2542 if ((error = write_note(&ets->notes[0], fd)) != 0)
2543 return (error);
2544 }
2545
2546 return (0);
2547 }
2548
2549 /*
2550 * Write out ELF coredump.
2551 *
2552 * See documentation of ELF object file format in:
2553 * http://www.caldera.com/developers/devspecs/gabi41.pdf
2554 *
2555 * Coredump format in linux is following:
2556 *
2557 * 0 +----------------------+ \
2558 * | ELF header | ET_CORE |
2559 * +----------------------+ |
2560 * | ELF program headers | |--- headers
2561 * | - NOTE section | |
2562 * | - PT_LOAD sections | |
2563 * +----------------------+ /
2564 * | NOTEs: |
2565 * | - NT_PRSTATUS |
2566 * | - NT_PRSINFO |
2567 * | - NT_AUXV |
2568 * +----------------------+ <-- aligned to target page
2569 * | Process memory dump |
2570 * : :
2571 * . .
2572 * : :
2573 * | |
2574 * +----------------------+
2575 *
2576 * NT_PRSTATUS -> struct elf_prstatus (per thread)
2577 * NT_PRSINFO -> struct elf_prpsinfo
2578 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
2579 *
2580 * Format follows System V format as close as possible. Current
2581 * version limitations are as follows:
2582 * - no floating point registers are dumped
2583 *
2584 * Function returns 0 in case of success, negative errno otherwise.
2585 *
2586 * TODO: make this work also during runtime: it should be
2587 * possible to force coredump from running process and then
2588 * continue processing. For example qemu could set up SIGUSR2
2589 * handler (provided that target process haven't registered
2590 * handler for that) that does the dump when signal is received.
2591 */
2592 static int elf_core_dump(int signr, const CPUState *env)
2593 {
2594 const TaskState *ts = (const TaskState *)env->opaque;
2595 struct vm_area_struct *vma = NULL;
2596 char corefile[PATH_MAX];
2597 struct elf_note_info info;
2598 struct elfhdr elf;
2599 struct elf_phdr phdr;
2600 struct rlimit dumpsize;
2601 struct mm_struct *mm = NULL;
2602 off_t offset = 0, data_offset = 0;
2603 int segs = 0;
2604 int fd = -1;
2605
2606 errno = 0;
2607 getrlimit(RLIMIT_CORE, &dumpsize);
2608 if (dumpsize.rlim_cur == 0)
2609 return 0;
2610
2611 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
2612 return (-errno);
2613
2614 if ((fd = open(corefile, O_WRONLY | O_CREAT,
2615 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
2616 return (-errno);
2617
2618 /*
2619 * Walk through target process memory mappings and
2620 * set up structure containing this information. After
2621 * this point vma_xxx functions can be used.
2622 */
2623 if ((mm = vma_init()) == NULL)
2624 goto out;
2625
2626 walk_memory_regions(mm, vma_walker);
2627 segs = vma_get_mapping_count(mm);
2628
2629 /*
2630 * Construct valid coredump ELF header. We also
2631 * add one more segment for notes.
2632 */
2633 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
2634 if (dump_write(fd, &elf, sizeof (elf)) != 0)
2635 goto out;
2636
2637 /* fill in in-memory version of notes */
2638 if (fill_note_info(&info, signr, env) < 0)
2639 goto out;
2640
2641 offset += sizeof (elf); /* elf header */
2642 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
2643
2644 /* write out notes program header */
2645 fill_elf_note_phdr(&phdr, info.notes_size, offset);
2646
2647 offset += info.notes_size;
2648 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
2649 goto out;
2650
2651 /*
2652 * ELF specification wants data to start at page boundary so
2653 * we align it here.
2654 */
2655 offset = roundup(offset, ELF_EXEC_PAGESIZE);
2656
2657 /*
2658 * Write program headers for memory regions mapped in
2659 * the target process.
2660 */
2661 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
2662 (void) memset(&phdr, 0, sizeof (phdr));
2663
2664 phdr.p_type = PT_LOAD;
2665 phdr.p_offset = offset;
2666 phdr.p_vaddr = vma->vma_start;
2667 phdr.p_paddr = 0;
2668 phdr.p_filesz = vma_dump_size(vma);
2669 offset += phdr.p_filesz;
2670 phdr.p_memsz = vma->vma_end - vma->vma_start;
2671 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
2672 if (vma->vma_flags & PROT_WRITE)
2673 phdr.p_flags |= PF_W;
2674 if (vma->vma_flags & PROT_EXEC)
2675 phdr.p_flags |= PF_X;
2676 phdr.p_align = ELF_EXEC_PAGESIZE;
2677
2678 dump_write(fd, &phdr, sizeof (phdr));
2679 }
2680
2681 /*
2682 * Next we write notes just after program headers. No
2683 * alignment needed here.
2684 */
2685 if (write_note_info(&info, fd) < 0)
2686 goto out;
2687
2688 /* align data to page boundary */
2689 data_offset = lseek(fd, 0, SEEK_CUR);
2690 data_offset = TARGET_PAGE_ALIGN(data_offset);
2691 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
2692 goto out;
2693
2694 /*
2695 * Finally we can dump process memory into corefile as well.
2696 */
2697 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
2698 abi_ulong addr;
2699 abi_ulong end;
2700
2701 end = vma->vma_start + vma_dump_size(vma);
2702
2703 for (addr = vma->vma_start; addr < end;
2704 addr += TARGET_PAGE_SIZE) {
2705 char page[TARGET_PAGE_SIZE];
2706 int error;
2707
2708 /*
2709 * Read in page from target process memory and
2710 * write it to coredump file.
2711 */
2712 error = copy_from_user(page, addr, sizeof (page));
2713 if (error != 0) {
2714 (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
2715 addr);
2716 errno = -error;
2717 goto out;
2718 }
2719 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
2720 goto out;
2721 }
2722 }
2723
2724 out:
2725 free_note_info(&info);
2726 if (mm != NULL)
2727 vma_delete(mm);
2728 (void) close(fd);
2729
2730 if (errno != 0)
2731 return (-errno);
2732 return (0);
2733 }
2734
2735 #endif /* USE_ELF_CORE_DUMP */
2736
2737 static int load_aout_interp(void * exptr, int interp_fd)
2738 {
2739 printf("a.out interpreter not yet supported\n");
2740 return(0);
2741 }
2742
2743 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
2744 {
2745 init_thread(regs, infop);
2746 }
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