1 /* This is the Linux kernel elf-loading code, ported into user space */
11 #include <sys/resource.h>
28 #define ELF_OSABI ELFOSABI_SYSV
30 /* from personality.h */
33 * Flags for bug emulation.
35 * These occupy the top three bytes.
38 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
39 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors
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,
55 * These go in the low byte. Avoid using the top bit, it will
56 * conflict with error returns.
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,
70 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
71 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
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 */
78 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
79 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
80 PER_OSF4 = 0x000f, /* OSF/1 v4 */
86 * Return the base personality without flags.
88 #define personality(pers) (pers & PER_MASK)
90 /* this flag is uneffective under linux too, should be deleted */
92 #define MAP_DENYWRITE 0
95 /* should probably go in elf.h */
102 #define ELF_PLATFORM get_elf_platform()
104 static const char *get_elf_platform(void)
106 static char elf_platform[] = "i386";
107 int family = (thread_env->cpuid_version >> 8) & 0xff;
111 elf_platform[1] = '0' + family;
115 #define ELF_HWCAP get_elf_hwcap()
117 static uint32_t get_elf_hwcap(void)
119 return thread_env->cpuid_features;
123 #define ELF_START_MMAP 0x2aaaaab000ULL
124 #define elf_check_arch(x) ( ((x) == ELF_ARCH) )
126 #define ELF_CLASS ELFCLASS64
127 #define ELF_DATA ELFDATA2LSB
128 #define ELF_ARCH EM_X86_64
130 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
133 regs->rsp = infop->start_stack;
134 regs->rip = infop->entry;
137 typedef target_ulong elf_greg_t;
138 typedef uint32_t target_uid_t;
139 typedef uint32_t target_gid_t;
140 typedef int32_t target_pid_t;
143 typedef elf_greg_t elf_gregset_t[ELF_NREG];
146 * Note that ELF_NREG should be 29 as there should be place for
147 * TRAPNO and ERR "registers" as well but linux doesn't dump
150 * See linux kernel: arch/x86/include/asm/elf.h
152 static void elf_core_copy_regs(elf_gregset_t *regs, const CPUState *env)
154 (*regs)[0] = env->regs[15];
155 (*regs)[1] = env->regs[14];
156 (*regs)[2] = env->regs[13];
157 (*regs)[3] = env->regs[12];
158 (*regs)[4] = env->regs[R_EBP];
159 (*regs)[5] = env->regs[R_EBX];
160 (*regs)[6] = env->regs[11];
161 (*regs)[7] = env->regs[10];
162 (*regs)[8] = env->regs[9];
163 (*regs)[9] = env->regs[8];
164 (*regs)[10] = env->regs[R_EAX];
165 (*regs)[11] = env->regs[R_ECX];
166 (*regs)[12] = env->regs[R_EDX];
167 (*regs)[13] = env->regs[R_ESI];
168 (*regs)[14] = env->regs[R_EDI];
169 (*regs)[15] = env->regs[R_EAX]; /* XXX */
170 (*regs)[16] = env->eip;
171 (*regs)[17] = env->segs[R_CS].selector & 0xffff;
172 (*regs)[18] = env->eflags;
173 (*regs)[19] = env->regs[R_ESP];
174 (*regs)[20] = env->segs[R_SS].selector & 0xffff;
175 (*regs)[21] = env->segs[R_FS].selector & 0xffff;
176 (*regs)[22] = env->segs[R_GS].selector & 0xffff;
177 (*regs)[23] = env->segs[R_DS].selector & 0xffff;
178 (*regs)[24] = env->segs[R_ES].selector & 0xffff;
179 (*regs)[25] = env->segs[R_FS].selector & 0xffff;
180 (*regs)[26] = env->segs[R_GS].selector & 0xffff;
185 #define ELF_START_MMAP 0x80000000
188 * This is used to ensure we don't load something for the wrong architecture.
190 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
193 * These are used to set parameters in the core dumps.
195 #define ELF_CLASS ELFCLASS32
196 #define ELF_DATA ELFDATA2LSB
197 #define ELF_ARCH EM_386
199 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
201 regs->esp = infop->start_stack;
202 regs->eip = infop->entry;
204 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
205 starts %edx contains a pointer to a function which might be
206 registered using `atexit'. This provides a mean for the
207 dynamic linker to call DT_FINI functions for shared libraries
208 that have been loaded before the code runs.
210 A value of 0 tells we have no such handler. */
214 typedef target_ulong elf_greg_t;
215 typedef uint16_t target_uid_t;
216 typedef uint16_t target_gid_t;
217 typedef int32_t target_pid_t;
220 typedef elf_greg_t elf_gregset_t[ELF_NREG];
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
227 * See linux kernel: arch/x86/include/asm/elf.h
229 static void elf_core_copy_regs(elf_gregset_t *regs, const CPUState *env)
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;
251 #define USE_ELF_CORE_DUMP
252 #define ELF_EXEC_PAGESIZE 4096
258 #define ELF_START_MMAP 0x80000000
260 #define elf_check_arch(x) ( (x) == EM_ARM )
262 #define ELF_CLASS ELFCLASS32
263 #ifdef TARGET_WORDS_BIGENDIAN
264 #define ELF_DATA ELFDATA2MSB
266 #define ELF_DATA ELFDATA2LSB
268 #define ELF_ARCH EM_ARM
270 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
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 ! */
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;
289 typedef uint32_t elf_greg_t;
290 typedef uint16_t target_uid_t;
291 typedef uint16_t target_gid_t;
292 typedef int32_t target_pid_t;
295 typedef elf_greg_t elf_gregset_t[ELF_NREG];
297 static void elf_core_copy_regs(elf_gregset_t *regs, const CPUState *env)
299 (*regs)[0] = env->regs[0];
300 (*regs)[1] = env->regs[1];
301 (*regs)[2] = env->regs[2];
302 (*regs)[3] = env->regs[3];
303 (*regs)[4] = env->regs[4];
304 (*regs)[5] = env->regs[5];
305 (*regs)[6] = env->regs[6];
306 (*regs)[7] = env->regs[7];
307 (*regs)[8] = env->regs[8];
308 (*regs)[9] = env->regs[9];
309 (*regs)[10] = env->regs[10];
310 (*regs)[11] = env->regs[11];
311 (*regs)[12] = env->regs[12];
312 (*regs)[13] = env->regs[13];
313 (*regs)[14] = env->regs[14];
314 (*regs)[15] = env->regs[15];
316 (*regs)[16] = cpsr_read((CPUState *)env);
317 (*regs)[17] = env->regs[0]; /* XXX */
320 #define USE_ELF_CORE_DUMP
321 #define ELF_EXEC_PAGESIZE 4096
325 ARM_HWCAP_ARM_SWP = 1 << 0,
326 ARM_HWCAP_ARM_HALF = 1 << 1,
327 ARM_HWCAP_ARM_THUMB = 1 << 2,
328 ARM_HWCAP_ARM_26BIT = 1 << 3,
329 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
330 ARM_HWCAP_ARM_FPA = 1 << 5,
331 ARM_HWCAP_ARM_VFP = 1 << 6,
332 ARM_HWCAP_ARM_EDSP = 1 << 7,
335 #define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
336 | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \
337 | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP)
342 #ifdef TARGET_SPARC64
344 #define ELF_START_MMAP 0x80000000
347 #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
349 #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
352 #define ELF_CLASS ELFCLASS64
353 #define ELF_DATA ELFDATA2MSB
354 #define ELF_ARCH EM_SPARCV9
356 #define STACK_BIAS 2047
358 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
363 regs->pc = infop->entry;
364 regs->npc = regs->pc + 4;
367 regs->u_regs[14] = infop->start_stack - 16 * 4;
369 if (personality(infop->personality) == PER_LINUX32)
370 regs->u_regs[14] = infop->start_stack - 16 * 4;
372 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
377 #define ELF_START_MMAP 0x80000000
379 #define elf_check_arch(x) ( (x) == EM_SPARC )
381 #define ELF_CLASS ELFCLASS32
382 #define ELF_DATA ELFDATA2MSB
383 #define ELF_ARCH EM_SPARC
385 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
388 regs->pc = infop->entry;
389 regs->npc = regs->pc + 4;
391 regs->u_regs[14] = infop->start_stack - 16 * 4;
399 #define ELF_START_MMAP 0x80000000
401 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
403 #define elf_check_arch(x) ( (x) == EM_PPC64 )
405 #define ELF_CLASS ELFCLASS64
409 #define elf_check_arch(x) ( (x) == EM_PPC )
411 #define ELF_CLASS ELFCLASS32
415 #ifdef TARGET_WORDS_BIGENDIAN
416 #define ELF_DATA ELFDATA2MSB
418 #define ELF_DATA ELFDATA2LSB
420 #define ELF_ARCH EM_PPC
422 /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
423 See arch/powerpc/include/asm/cputable.h. */
425 PPC_FEATURE_32 = 0x80000000,
426 PPC_FEATURE_64 = 0x40000000,
427 PPC_FEATURE_601_INSTR = 0x20000000,
428 PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
429 PPC_FEATURE_HAS_FPU = 0x08000000,
430 PPC_FEATURE_HAS_MMU = 0x04000000,
431 PPC_FEATURE_HAS_4xxMAC = 0x02000000,
432 PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
433 PPC_FEATURE_HAS_SPE = 0x00800000,
434 PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
435 PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
436 PPC_FEATURE_NO_TB = 0x00100000,
437 PPC_FEATURE_POWER4 = 0x00080000,
438 PPC_FEATURE_POWER5 = 0x00040000,
439 PPC_FEATURE_POWER5_PLUS = 0x00020000,
440 PPC_FEATURE_CELL = 0x00010000,
441 PPC_FEATURE_BOOKE = 0x00008000,
442 PPC_FEATURE_SMT = 0x00004000,
443 PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
444 PPC_FEATURE_ARCH_2_05 = 0x00001000,
445 PPC_FEATURE_PA6T = 0x00000800,
446 PPC_FEATURE_HAS_DFP = 0x00000400,
447 PPC_FEATURE_POWER6_EXT = 0x00000200,
448 PPC_FEATURE_ARCH_2_06 = 0x00000100,
449 PPC_FEATURE_HAS_VSX = 0x00000080,
450 PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
452 PPC_FEATURE_TRUE_LE = 0x00000002,
453 PPC_FEATURE_PPC_LE = 0x00000001,
456 #define ELF_HWCAP get_elf_hwcap()
458 static uint32_t get_elf_hwcap(void)
460 CPUState *e = thread_env;
461 uint32_t features = 0;
463 /* We don't have to be terribly complete here; the high points are
464 Altivec/FP/SPE support. Anything else is just a bonus. */
465 #define GET_FEATURE(flag, feature) \
466 do {if (e->insns_flags & flag) features |= feature; } while(0)
467 GET_FEATURE(PPC_64B, PPC_FEATURE_64);
468 GET_FEATURE(PPC_FLOAT, PPC_FEATURE_HAS_FPU);
469 GET_FEATURE(PPC_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC);
470 GET_FEATURE(PPC_SPE, PPC_FEATURE_HAS_SPE);
471 GET_FEATURE(PPC_SPE_SINGLE, PPC_FEATURE_HAS_EFP_SINGLE);
472 GET_FEATURE(PPC_SPE_DOUBLE, PPC_FEATURE_HAS_EFP_DOUBLE);
473 GET_FEATURE(PPC_BOOKE, PPC_FEATURE_BOOKE);
474 GET_FEATURE(PPC_405_MAC, PPC_FEATURE_HAS_4xxMAC);
481 * We need to put in some extra aux table entries to tell glibc what
482 * the cache block size is, so it can use the dcbz instruction safely.
484 #define AT_DCACHEBSIZE 19
485 #define AT_ICACHEBSIZE 20
486 #define AT_UCACHEBSIZE 21
487 /* A special ignored type value for PPC, for glibc compatibility. */
488 #define AT_IGNOREPPC 22
490 * The requirements here are:
491 * - keep the final alignment of sp (sp & 0xf)
492 * - make sure the 32-bit value at the first 16 byte aligned position of
493 * AUXV is greater than 16 for glibc compatibility.
494 * AT_IGNOREPPC is used for that.
495 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
496 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
498 #define DLINFO_ARCH_ITEMS 5
499 #define ARCH_DLINFO \
501 NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
502 NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
503 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
505 * Now handle glibc compatibility. \
507 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
508 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
511 static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
513 abi_ulong pos = infop->start_stack;
515 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
516 abi_ulong entry, toc;
519 _regs->gpr[1] = infop->start_stack;
520 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
521 entry = ldq_raw(infop->entry) + infop->load_addr;
522 toc = ldq_raw(infop->entry + 8) + infop->load_addr;
524 infop->entry = entry;
526 _regs->nip = infop->entry;
527 /* Note that isn't exactly what regular kernel does
528 * but this is what the ABI wants and is needed to allow
529 * execution of PPC BSD programs.
531 /* FIXME - what to for failure of get_user()? */
532 get_user_ual(_regs->gpr[3], pos);
533 pos += sizeof(abi_ulong);
535 for (tmp = 1; tmp != 0; pos += sizeof(abi_ulong))
540 #define ELF_EXEC_PAGESIZE 4096
546 #define ELF_START_MMAP 0x80000000
548 #define elf_check_arch(x) ( (x) == EM_MIPS )
551 #define ELF_CLASS ELFCLASS64
553 #define ELF_CLASS ELFCLASS32
555 #ifdef TARGET_WORDS_BIGENDIAN
556 #define ELF_DATA ELFDATA2MSB
558 #define ELF_DATA ELFDATA2LSB
560 #define ELF_ARCH EM_MIPS
562 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
564 regs->cp0_status = 2 << CP0St_KSU;
565 regs->cp0_epc = infop->entry;
566 regs->regs[29] = infop->start_stack;
569 #define ELF_EXEC_PAGESIZE 4096
571 #endif /* TARGET_MIPS */
573 #ifdef TARGET_MICROBLAZE
575 #define ELF_START_MMAP 0x80000000
577 #define elf_check_arch(x) ( (x) == EM_XILINX_MICROBLAZE )
579 #define ELF_CLASS ELFCLASS32
580 #define ELF_DATA ELFDATA2MSB
581 #define ELF_ARCH EM_MIPS
583 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
585 regs->pc = infop->entry;
586 regs->r1 = infop->start_stack;
590 #define USE_ELF_CORE_DUMP
591 #define ELF_EXEC_PAGESIZE 4096
593 #endif /* TARGET_MICROBLAZE */
597 #define ELF_START_MMAP 0x80000000
599 #define elf_check_arch(x) ( (x) == EM_SH )
601 #define ELF_CLASS ELFCLASS32
602 #define ELF_DATA ELFDATA2LSB
603 #define ELF_ARCH EM_SH
605 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
607 /* Check other registers XXXXX */
608 regs->pc = infop->entry;
609 regs->regs[15] = infop->start_stack;
612 #define ELF_EXEC_PAGESIZE 4096
618 #define ELF_START_MMAP 0x80000000
620 #define elf_check_arch(x) ( (x) == EM_CRIS )
622 #define ELF_CLASS ELFCLASS32
623 #define ELF_DATA ELFDATA2LSB
624 #define ELF_ARCH EM_CRIS
626 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
628 regs->erp = infop->entry;
631 #define ELF_EXEC_PAGESIZE 8192
637 #define ELF_START_MMAP 0x80000000
639 #define elf_check_arch(x) ( (x) == EM_68K )
641 #define ELF_CLASS ELFCLASS32
642 #define ELF_DATA ELFDATA2MSB
643 #define ELF_ARCH EM_68K
645 /* ??? Does this need to do anything?
646 #define ELF_PLAT_INIT(_r) */
648 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
650 regs->usp = infop->start_stack;
652 regs->pc = infop->entry;
655 #define ELF_EXEC_PAGESIZE 8192
661 #define ELF_START_MMAP (0x30000000000ULL)
663 #define elf_check_arch(x) ( (x) == ELF_ARCH )
665 #define ELF_CLASS ELFCLASS64
666 #define ELF_DATA ELFDATA2MSB
667 #define ELF_ARCH EM_ALPHA
669 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
671 regs->pc = infop->entry;
673 regs->usp = infop->start_stack;
674 regs->unique = infop->start_data; /* ? */
675 printf("Set unique value to " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n",
676 regs->unique, infop->start_data);
679 #define ELF_EXEC_PAGESIZE 8192
681 #endif /* TARGET_ALPHA */
684 #define ELF_PLATFORM (NULL)
693 #define ELF_CLASS ELFCLASS32
695 #define bswaptls(ptr) bswap32s(ptr)
702 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
703 unsigned int a_text; /* length of text, in bytes */
704 unsigned int a_data; /* length of data, in bytes */
705 unsigned int a_bss; /* length of uninitialized data area, in bytes */
706 unsigned int a_syms; /* length of symbol table data in file, in bytes */
707 unsigned int a_entry; /* start address */
708 unsigned int a_trsize; /* length of relocation info for text, in bytes */
709 unsigned int a_drsize; /* length of relocation info for data, in bytes */
713 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
719 /* max code+data+bss space allocated to elf interpreter */
720 #define INTERP_MAP_SIZE (32 * 1024 * 1024)
722 /* max code+data+bss+brk space allocated to ET_DYN executables */
723 #define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
725 /* Necessary parameters */
726 #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
727 #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1))
728 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
730 #define INTERPRETER_NONE 0
731 #define INTERPRETER_AOUT 1
732 #define INTERPRETER_ELF 2
734 #define DLINFO_ITEMS 12
736 static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
741 static int load_aout_interp(void * exptr, int interp_fd);
744 static void bswap_ehdr(struct elfhdr *ehdr)
746 bswap16s(&ehdr->e_type); /* Object file type */
747 bswap16s(&ehdr->e_machine); /* Architecture */
748 bswap32s(&ehdr->e_version); /* Object file version */
749 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
750 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
751 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
752 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
753 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
754 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
755 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
756 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
757 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
758 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
761 static void bswap_phdr(struct elf_phdr *phdr)
763 bswap32s(&phdr->p_type); /* Segment type */
764 bswaptls(&phdr->p_offset); /* Segment file offset */
765 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
766 bswaptls(&phdr->p_paddr); /* Segment physical address */
767 bswaptls(&phdr->p_filesz); /* Segment size in file */
768 bswaptls(&phdr->p_memsz); /* Segment size in memory */
769 bswap32s(&phdr->p_flags); /* Segment flags */
770 bswaptls(&phdr->p_align); /* Segment alignment */
773 static void bswap_shdr(struct elf_shdr *shdr)
775 bswap32s(&shdr->sh_name);
776 bswap32s(&shdr->sh_type);
777 bswaptls(&shdr->sh_flags);
778 bswaptls(&shdr->sh_addr);
779 bswaptls(&shdr->sh_offset);
780 bswaptls(&shdr->sh_size);
781 bswap32s(&shdr->sh_link);
782 bswap32s(&shdr->sh_info);
783 bswaptls(&shdr->sh_addralign);
784 bswaptls(&shdr->sh_entsize);
787 static void bswap_sym(struct elf_sym *sym)
789 bswap32s(&sym->st_name);
790 bswaptls(&sym->st_value);
791 bswaptls(&sym->st_size);
792 bswap16s(&sym->st_shndx);
796 #ifdef USE_ELF_CORE_DUMP
797 static int elf_core_dump(int, const CPUState *);
800 static void bswap_note(struct elf_note *en)
802 bswaptls(&en->n_namesz);
803 bswaptls(&en->n_descsz);
804 bswaptls(&en->n_type);
806 #endif /* BSWAP_NEEDED */
808 #endif /* USE_ELF_CORE_DUMP */
811 * 'copy_elf_strings()' copies argument/envelope strings from user
812 * memory to free pages in kernel mem. These are in a format ready
813 * to be put directly into the top of new user memory.
816 static abi_ulong copy_elf_strings(int argc,char ** argv, void **page,
819 char *tmp, *tmp1, *pag = NULL;
823 return 0; /* bullet-proofing */
828 fprintf(stderr, "VFS: argc is wrong");
834 if (p < len) { /* this shouldn't happen - 128kB */
840 offset = p % TARGET_PAGE_SIZE;
841 pag = (char *)page[p/TARGET_PAGE_SIZE];
843 pag = (char *)malloc(TARGET_PAGE_SIZE);
844 memset(pag, 0, TARGET_PAGE_SIZE);
845 page[p/TARGET_PAGE_SIZE] = pag;
850 if (len == 0 || offset == 0) {
851 *(pag + offset) = *tmp;
854 int bytes_to_copy = (len > offset) ? offset : len;
855 tmp -= bytes_to_copy;
857 offset -= bytes_to_copy;
858 len -= bytes_to_copy;
859 memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
866 static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm,
867 struct image_info *info)
869 abi_ulong stack_base, size, error;
872 /* Create enough stack to hold everything. If we don't use
873 * it for args, we'll use it for something else...
875 size = x86_stack_size;
876 if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE)
877 size = MAX_ARG_PAGES*TARGET_PAGE_SIZE;
878 error = target_mmap(0,
879 size + qemu_host_page_size,
880 PROT_READ | PROT_WRITE,
881 MAP_PRIVATE | MAP_ANONYMOUS,
887 /* we reserve one extra page at the top of the stack as guard */
888 target_mprotect(error + size, qemu_host_page_size, PROT_NONE);
890 stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
893 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
896 /* FIXME - check return value of memcpy_to_target() for failure */
897 memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE);
900 stack_base += TARGET_PAGE_SIZE;
905 static void set_brk(abi_ulong start, abi_ulong end)
907 /* page-align the start and end addresses... */
908 start = HOST_PAGE_ALIGN(start);
909 end = HOST_PAGE_ALIGN(end);
912 if(target_mmap(start, end - start,
913 PROT_READ | PROT_WRITE | PROT_EXEC,
914 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0) == -1) {
915 perror("cannot mmap brk");
921 /* We need to explicitly zero any fractional pages after the data
922 section (i.e. bss). This would contain the junk from the file that
923 should not be in memory. */
924 static void padzero(abi_ulong elf_bss, abi_ulong last_bss)
928 if (elf_bss >= last_bss)
931 /* XXX: this is really a hack : if the real host page size is
932 smaller than the target page size, some pages after the end
933 of the file may not be mapped. A better fix would be to
934 patch target_mmap(), but it is more complicated as the file
935 size must be known */
936 if (qemu_real_host_page_size < qemu_host_page_size) {
937 abi_ulong end_addr, end_addr1;
938 end_addr1 = (elf_bss + qemu_real_host_page_size - 1) &
939 ~(qemu_real_host_page_size - 1);
940 end_addr = HOST_PAGE_ALIGN(elf_bss);
941 if (end_addr1 < end_addr) {
942 mmap((void *)g2h(end_addr1), end_addr - end_addr1,
943 PROT_READ|PROT_WRITE|PROT_EXEC,
944 MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
948 nbyte = elf_bss & (qemu_host_page_size-1);
950 nbyte = qemu_host_page_size - nbyte;
952 /* FIXME - what to do if put_user() fails? */
953 put_user_u8(0, elf_bss);
960 static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
961 struct elfhdr * exec,
964 abi_ulong interp_load_addr, int ibcs,
965 struct image_info *info)
969 abi_ulong u_platform;
970 const char *k_platform;
971 const int n = sizeof(elf_addr_t);
975 k_platform = ELF_PLATFORM;
977 size_t len = strlen(k_platform) + 1;
978 sp -= (len + n - 1) & ~(n - 1);
980 /* FIXME - check return value of memcpy_to_target() for failure */
981 memcpy_to_target(sp, k_platform, len);
984 * Force 16 byte _final_ alignment here for generality.
986 sp = sp &~ (abi_ulong)15;
987 size = (DLINFO_ITEMS + 1) * 2;
990 #ifdef DLINFO_ARCH_ITEMS
991 size += DLINFO_ARCH_ITEMS * 2;
993 size += envc + argc + 2;
994 size += (!ibcs ? 3 : 1); /* argc itself */
997 sp -= 16 - (size & 15);
999 /* This is correct because Linux defines
1000 * elf_addr_t as Elf32_Off / Elf64_Off
1002 #define NEW_AUX_ENT(id, val) do { \
1003 sp -= n; put_user_ual(val, sp); \
1004 sp -= n; put_user_ual(id, sp); \
1007 NEW_AUX_ENT (AT_NULL, 0);
1009 /* There must be exactly DLINFO_ITEMS entries here. */
1010 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff));
1011 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
1012 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
1013 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
1014 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr));
1015 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
1016 NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry);
1017 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
1018 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
1019 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
1020 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
1021 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
1022 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
1024 NEW_AUX_ENT(AT_PLATFORM, u_platform);
1027 * ARCH_DLINFO must come last so platform specific code can enforce
1028 * special alignment requirements on the AUXV if necessary (eg. PPC).
1034 info->saved_auxv = sp;
1036 sp = loader_build_argptr(envc, argc, sp, p, !ibcs);
1041 static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex,
1043 abi_ulong *interp_load_addr)
1045 struct elf_phdr *elf_phdata = NULL;
1046 struct elf_phdr *eppnt;
1047 abi_ulong load_addr = 0;
1048 int load_addr_set = 0;
1050 abi_ulong last_bss, elf_bss;
1059 bswap_ehdr(interp_elf_ex);
1061 /* First of all, some simple consistency checks */
1062 if ((interp_elf_ex->e_type != ET_EXEC &&
1063 interp_elf_ex->e_type != ET_DYN) ||
1064 !elf_check_arch(interp_elf_ex->e_machine)) {
1065 return ~((abi_ulong)0UL);
1069 /* Now read in all of the header information */
1071 if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE)
1072 return ~(abi_ulong)0UL;
1074 elf_phdata = (struct elf_phdr *)
1075 malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
1078 return ~((abi_ulong)0UL);
1081 * If the size of this structure has changed, then punt, since
1082 * we will be doing the wrong thing.
1084 if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) {
1086 return ~((abi_ulong)0UL);
1089 retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET);
1091 retval = read(interpreter_fd,
1092 (char *) elf_phdata,
1093 sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
1096 perror("load_elf_interp");
1103 for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) {
1108 if (interp_elf_ex->e_type == ET_DYN) {
1109 /* in order to avoid hardcoding the interpreter load
1110 address in qemu, we allocate a big enough memory zone */
1111 error = target_mmap(0, INTERP_MAP_SIZE,
1112 PROT_NONE, MAP_PRIVATE | MAP_ANON,
1123 for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++)
1124 if (eppnt->p_type == PT_LOAD) {
1125 int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
1127 abi_ulong vaddr = 0;
1130 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
1131 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
1132 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
1133 if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) {
1134 elf_type |= MAP_FIXED;
1135 vaddr = eppnt->p_vaddr;
1137 error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr),
1138 eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr),
1142 eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr));
1146 close(interpreter_fd);
1148 return ~((abi_ulong)0UL);
1151 if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
1157 * Find the end of the file mapping for this phdr, and keep
1158 * track of the largest address we see for this.
1160 k = load_addr + eppnt->p_vaddr + eppnt->p_filesz;
1161 if (k > elf_bss) elf_bss = k;
1164 * Do the same thing for the memory mapping - between
1165 * elf_bss and last_bss is the bss section.
1167 k = load_addr + eppnt->p_memsz + eppnt->p_vaddr;
1168 if (k > last_bss) last_bss = k;
1171 /* Now use mmap to map the library into memory. */
1173 close(interpreter_fd);
1176 * Now fill out the bss section. First pad the last page up
1177 * to the page boundary, and then perform a mmap to make sure
1178 * that there are zeromapped pages up to and including the last
1181 padzero(elf_bss, last_bss);
1182 elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */
1184 /* Map the last of the bss segment */
1185 if (last_bss > elf_bss) {
1186 target_mmap(elf_bss, last_bss-elf_bss,
1187 PROT_READ|PROT_WRITE|PROT_EXEC,
1188 MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
1192 *interp_load_addr = load_addr;
1193 return ((abi_ulong) interp_elf_ex->e_entry) + load_addr;
1196 static int symfind(const void *s0, const void *s1)
1198 struct elf_sym *key = (struct elf_sym *)s0;
1199 struct elf_sym *sym = (struct elf_sym *)s1;
1201 if (key->st_value < sym->st_value) {
1203 } else if (key->st_value > sym->st_value + sym->st_size) {
1209 static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
1211 #if ELF_CLASS == ELFCLASS32
1212 struct elf_sym *syms = s->disas_symtab.elf32;
1214 struct elf_sym *syms = s->disas_symtab.elf64;
1219 struct elf_sym *sym;
1221 key.st_value = orig_addr;
1223 sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), symfind);
1225 return s->disas_strtab + sym->st_name;
1231 /* FIXME: This should use elf_ops.h */
1232 static int symcmp(const void *s0, const void *s1)
1234 struct elf_sym *sym0 = (struct elf_sym *)s0;
1235 struct elf_sym *sym1 = (struct elf_sym *)s1;
1236 return (sym0->st_value < sym1->st_value)
1238 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
1241 /* Best attempt to load symbols from this ELF object. */
1242 static void load_symbols(struct elfhdr *hdr, int fd)
1244 unsigned int i, nsyms;
1245 struct elf_shdr sechdr, symtab, strtab;
1248 struct elf_sym *syms;
1250 lseek(fd, hdr->e_shoff, SEEK_SET);
1251 for (i = 0; i < hdr->e_shnum; i++) {
1252 if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr))
1255 bswap_shdr(&sechdr);
1257 if (sechdr.sh_type == SHT_SYMTAB) {
1259 lseek(fd, hdr->e_shoff
1260 + sizeof(sechdr) * sechdr.sh_link, SEEK_SET);
1261 if (read(fd, &strtab, sizeof(strtab))
1265 bswap_shdr(&strtab);
1270 return; /* Shouldn't happen... */
1273 /* Now know where the strtab and symtab are. Snarf them. */
1274 s = malloc(sizeof(*s));
1275 syms = malloc(symtab.sh_size);
1278 s->disas_strtab = strings = malloc(strtab.sh_size);
1279 if (!s->disas_strtab)
1282 lseek(fd, symtab.sh_offset, SEEK_SET);
1283 if (read(fd, syms, symtab.sh_size) != symtab.sh_size)
1286 nsyms = symtab.sh_size / sizeof(struct elf_sym);
1291 bswap_sym(syms + i);
1293 // Throw away entries which we do not need.
1294 if (syms[i].st_shndx == SHN_UNDEF ||
1295 syms[i].st_shndx >= SHN_LORESERVE ||
1296 ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
1299 syms[i] = syms[nsyms];
1303 #if defined(TARGET_ARM) || defined (TARGET_MIPS)
1304 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
1305 syms[i].st_value &= ~(target_ulong)1;
1309 syms = realloc(syms, nsyms * sizeof(*syms));
1311 qsort(syms, nsyms, sizeof(*syms), symcmp);
1313 lseek(fd, strtab.sh_offset, SEEK_SET);
1314 if (read(fd, strings, strtab.sh_size) != strtab.sh_size)
1316 s->disas_num_syms = nsyms;
1317 #if ELF_CLASS == ELFCLASS32
1318 s->disas_symtab.elf32 = syms;
1319 s->lookup_symbol = lookup_symbolxx;
1321 s->disas_symtab.elf64 = syms;
1322 s->lookup_symbol = lookup_symbolxx;
1328 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
1329 struct image_info * info)
1331 struct elfhdr elf_ex;
1332 struct elfhdr interp_elf_ex;
1333 struct exec interp_ex;
1334 int interpreter_fd = -1; /* avoid warning */
1335 abi_ulong load_addr, load_bias;
1336 int load_addr_set = 0;
1337 unsigned int interpreter_type = INTERPRETER_NONE;
1338 unsigned char ibcs2_interpreter;
1340 abi_ulong mapped_addr;
1341 struct elf_phdr * elf_ppnt;
1342 struct elf_phdr *elf_phdata;
1343 abi_ulong elf_bss, k, elf_brk;
1345 char * elf_interpreter;
1346 abi_ulong elf_entry, interp_load_addr = 0;
1348 abi_ulong start_code, end_code, start_data, end_data;
1349 abi_ulong reloc_func_desc = 0;
1350 abi_ulong elf_stack;
1351 char passed_fileno[6];
1353 ibcs2_interpreter = 0;
1357 elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */
1359 bswap_ehdr(&elf_ex);
1362 /* First of all, some simple consistency checks */
1363 if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
1364 (! elf_check_arch(elf_ex.e_machine))) {
1368 bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
1369 bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p);
1370 bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p);
1375 /* Now read in all of the header information */
1376 elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum);
1377 if (elf_phdata == NULL) {
1381 retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET);
1383 retval = read(bprm->fd, (char *) elf_phdata,
1384 elf_ex.e_phentsize * elf_ex.e_phnum);
1388 perror("load_elf_binary");
1395 elf_ppnt = elf_phdata;
1396 for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) {
1397 bswap_phdr(elf_ppnt);
1400 elf_ppnt = elf_phdata;
1406 elf_stack = ~((abi_ulong)0UL);
1407 elf_interpreter = NULL;
1408 start_code = ~((abi_ulong)0UL);
1412 interp_ex.a_info = 0;
1414 for(i=0;i < elf_ex.e_phnum; i++) {
1415 if (elf_ppnt->p_type == PT_INTERP) {
1416 if ( elf_interpreter != NULL )
1419 free(elf_interpreter);
1424 /* This is the program interpreter used for
1425 * shared libraries - for now assume that this
1426 * is an a.out format binary
1429 elf_interpreter = (char *)malloc(elf_ppnt->p_filesz);
1431 if (elf_interpreter == NULL) {
1437 retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET);
1439 retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz);
1442 perror("load_elf_binary2");
1446 /* If the program interpreter is one of these two,
1447 then assume an iBCS2 image. Otherwise assume
1448 a native linux image. */
1450 /* JRP - Need to add X86 lib dir stuff here... */
1452 if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 ||
1453 strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) {
1454 ibcs2_interpreter = 1;
1458 printf("Using ELF interpreter %s\n", elf_interpreter);
1461 retval = open(path(elf_interpreter), O_RDONLY);
1463 interpreter_fd = retval;
1466 perror(elf_interpreter);
1468 /* retval = -errno; */
1473 retval = lseek(interpreter_fd, 0, SEEK_SET);
1475 retval = read(interpreter_fd,bprm->buf,128);
1479 interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */
1480 interp_elf_ex=*((struct elfhdr *) bprm->buf); /* elf exec-header */
1483 perror("load_elf_binary3");
1486 free(elf_interpreter);
1494 /* Some simple consistency checks for the interpreter */
1495 if (elf_interpreter){
1496 interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT;
1498 /* Now figure out which format our binary is */
1499 if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) &&
1500 (N_MAGIC(interp_ex) != QMAGIC)) {
1501 interpreter_type = INTERPRETER_ELF;
1504 if (interp_elf_ex.e_ident[0] != 0x7f ||
1505 strncmp((char *)&interp_elf_ex.e_ident[1], "ELF",3) != 0) {
1506 interpreter_type &= ~INTERPRETER_ELF;
1509 if (!interpreter_type) {
1510 free(elf_interpreter);
1517 /* OK, we are done with that, now set up the arg stuff,
1518 and then start this sucker up */
1523 if (interpreter_type == INTERPRETER_AOUT) {
1524 snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd);
1525 passed_p = passed_fileno;
1527 if (elf_interpreter) {
1528 bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p);
1533 if (elf_interpreter) {
1534 free(elf_interpreter);
1542 /* OK, This is the point of no return */
1545 info->start_mmap = (abi_ulong)ELF_START_MMAP;
1547 elf_entry = (abi_ulong) elf_ex.e_entry;
1549 #if defined(CONFIG_USE_GUEST_BASE)
1551 * In case where user has not explicitly set the guest_base, we
1552 * probe here that should we set it automatically.
1554 if (guest_base == 0) {
1556 * Go through ELF program header table and find out whether
1557 * any of the segments drop below our current mmap_min_addr and
1558 * in that case set guest_base to corresponding address.
1560 for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum;
1562 if (elf_ppnt->p_type != PT_LOAD)
1564 if (HOST_PAGE_ALIGN(elf_ppnt->p_vaddr) < mmap_min_addr) {
1565 guest_base = HOST_PAGE_ALIGN(mmap_min_addr);
1566 qemu_log("setting guest_base=0x%lx\n", guest_base);
1571 #endif /* CONFIG_USE_GUEST_BASE */
1573 /* Do this so that we can load the interpreter, if need be. We will
1574 change some of these later */
1576 bprm->p = setup_arg_pages(bprm->p, bprm, info);
1577 info->start_stack = bprm->p;
1579 /* Now we do a little grungy work by mmaping the ELF image into
1580 * the correct location in memory. At this point, we assume that
1581 * the image should be loaded at fixed address, not at a variable
1585 for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) {
1590 if (elf_ppnt->p_type != PT_LOAD)
1593 if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
1594 if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
1595 if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
1596 elf_flags = MAP_PRIVATE | MAP_DENYWRITE;
1597 if (elf_ex.e_type == ET_EXEC || load_addr_set) {
1598 elf_flags |= MAP_FIXED;
1599 } else if (elf_ex.e_type == ET_DYN) {
1600 /* Try and get dynamic programs out of the way of the default mmap
1601 base, as well as whatever program they might try to exec. This
1602 is because the brk will follow the loader, and is not movable. */
1603 /* NOTE: for qemu, we do a big mmap to get enough space
1604 without hardcoding any address */
1605 error = target_mmap(0, ET_DYN_MAP_SIZE,
1606 PROT_NONE, MAP_PRIVATE | MAP_ANON,
1612 load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr);
1615 error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr),
1616 (elf_ppnt->p_filesz +
1617 TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)),
1619 (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE),
1621 (elf_ppnt->p_offset -
1622 TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)));
1628 #ifdef LOW_ELF_STACK
1629 if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
1630 elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr);
1633 if (!load_addr_set) {
1635 load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset;
1636 if (elf_ex.e_type == ET_DYN) {
1637 load_bias += error -
1638 TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr);
1639 load_addr += load_bias;
1640 reloc_func_desc = load_bias;
1643 k = elf_ppnt->p_vaddr;
1648 k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz;
1651 if ((elf_ppnt->p_flags & PF_X) && end_code < k)
1655 k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz;
1656 if (k > elf_brk) elf_brk = k;
1659 elf_entry += load_bias;
1660 elf_bss += load_bias;
1661 elf_brk += load_bias;
1662 start_code += load_bias;
1663 end_code += load_bias;
1664 start_data += load_bias;
1665 end_data += load_bias;
1667 if (elf_interpreter) {
1668 if (interpreter_type & 1) {
1669 elf_entry = load_aout_interp(&interp_ex, interpreter_fd);
1671 else if (interpreter_type & 2) {
1672 elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd,
1675 reloc_func_desc = interp_load_addr;
1677 close(interpreter_fd);
1678 free(elf_interpreter);
1680 if (elf_entry == ~((abi_ulong)0UL)) {
1681 printf("Unable to load interpreter\n");
1690 if (qemu_log_enabled())
1691 load_symbols(&elf_ex, bprm->fd);
1693 if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd);
1694 info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX);
1696 #ifdef LOW_ELF_STACK
1697 info->start_stack = bprm->p = elf_stack - 4;
1699 bprm->p = create_elf_tables(bprm->p,
1703 load_addr, load_bias,
1705 (interpreter_type == INTERPRETER_AOUT ? 0 : 1),
1707 info->load_addr = reloc_func_desc;
1708 info->start_brk = info->brk = elf_brk;
1709 info->end_code = end_code;
1710 info->start_code = start_code;
1711 info->start_data = start_data;
1712 info->end_data = end_data;
1713 info->start_stack = bprm->p;
1715 /* Calling set_brk effectively mmaps the pages that we need for the bss and break
1717 set_brk(elf_bss, elf_brk);
1719 padzero(elf_bss, elf_brk);
1722 printf("(start_brk) %x\n" , info->start_brk);
1723 printf("(end_code) %x\n" , info->end_code);
1724 printf("(start_code) %x\n" , info->start_code);
1725 printf("(end_data) %x\n" , info->end_data);
1726 printf("(start_stack) %x\n" , info->start_stack);
1727 printf("(brk) %x\n" , info->brk);
1730 if ( info->personality == PER_SVR4 )
1732 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
1733 and some applications "depend" upon this behavior.
1734 Since we do not have the power to recompile these, we
1735 emulate the SVr4 behavior. Sigh. */
1736 mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
1737 MAP_FIXED | MAP_PRIVATE, -1, 0);
1740 info->entry = elf_entry;
1742 #ifdef USE_ELF_CORE_DUMP
1743 bprm->core_dump = &elf_core_dump;
1749 #ifdef USE_ELF_CORE_DUMP
1752 * Definitions to generate Intel SVR4-like core files.
1753 * These mostly have the same names as the SVR4 types with "elf_"
1754 * tacked on the front to prevent clashes with linux definitions,
1755 * and the typedef forms have been avoided. This is mostly like
1756 * the SVR4 structure, but more Linuxy, with things that Linux does
1757 * not support and which gdb doesn't really use excluded.
1759 * Fields we don't dump (their contents is zero) in linux-user qemu
1760 * are marked with XXX.
1762 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
1764 * Porting ELF coredump for target is (quite) simple process. First you
1765 * define ELF_USE_CORE_DUMP in target ELF code (where init_thread() for
1766 * the target resides):
1768 * #define USE_ELF_CORE_DUMP
1770 * Next you define type of register set used for dumping. ELF specification
1771 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
1773 * typedef <target_regtype> elf_greg_t;
1774 * #define ELF_NREG <number of registers>
1775 * typedef elf_greg_t elf_gregset_t[ELF_NREG];
1777 * Then define following types to match target types. Actual types can
1778 * be found from linux kernel (arch/<ARCH>/include/asm/posix_types.h):
1780 * typedef <target_uid_type> target_uid_t;
1781 * typedef <target_gid_type> target_gid_t;
1782 * typedef <target_pid_type> target_pid_t;
1784 * Last step is to implement target specific function that copies registers
1785 * from given cpu into just specified register set. Prototype is:
1787 * static void elf_core_copy_regs(elf_gregset_t *regs, const CPUState *env);
1790 * regs - copy register values into here (allocated and zeroed by caller)
1791 * env - copy registers from here
1793 * Example for ARM target is provided in this file.
1796 /* An ELF note in memory */
1800 size_t namesz_rounded;
1807 struct elf_siginfo {
1808 int si_signo; /* signal number */
1809 int si_code; /* extra code */
1810 int si_errno; /* errno */
1813 struct elf_prstatus {
1814 struct elf_siginfo pr_info; /* Info associated with signal */
1815 short pr_cursig; /* Current signal */
1816 target_ulong pr_sigpend; /* XXX */
1817 target_ulong pr_sighold; /* XXX */
1818 target_pid_t pr_pid;
1819 target_pid_t pr_ppid;
1820 target_pid_t pr_pgrp;
1821 target_pid_t pr_sid;
1822 struct target_timeval pr_utime; /* XXX User time */
1823 struct target_timeval pr_stime; /* XXX System time */
1824 struct target_timeval pr_cutime; /* XXX Cumulative user time */
1825 struct target_timeval pr_cstime; /* XXX Cumulative system time */
1826 elf_gregset_t pr_reg; /* GP registers */
1827 int pr_fpvalid; /* XXX */
1830 #define ELF_PRARGSZ (80) /* Number of chars for args */
1832 struct elf_prpsinfo {
1833 char pr_state; /* numeric process state */
1834 char pr_sname; /* char for pr_state */
1835 char pr_zomb; /* zombie */
1836 char pr_nice; /* nice val */
1837 target_ulong pr_flag; /* flags */
1838 target_uid_t pr_uid;
1839 target_gid_t pr_gid;
1840 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
1842 char pr_fname[16]; /* filename of executable */
1843 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
1846 /* Here is the structure in which status of each thread is captured. */
1847 struct elf_thread_status {
1848 TAILQ_ENTRY(elf_thread_status) ets_link;
1849 struct elf_prstatus prstatus; /* NT_PRSTATUS */
1851 elf_fpregset_t fpu; /* NT_PRFPREG */
1852 struct task_struct *thread;
1853 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
1855 struct memelfnote notes[1];
1859 struct elf_note_info {
1860 struct memelfnote *notes;
1861 struct elf_prstatus *prstatus; /* NT_PRSTATUS */
1862 struct elf_prpsinfo *psinfo; /* NT_PRPSINFO */
1864 TAILQ_HEAD(thread_list_head, elf_thread_status) thread_list;
1867 * Current version of ELF coredump doesn't support
1868 * dumping fp regs etc.
1870 elf_fpregset_t *fpu;
1871 elf_fpxregset_t *xfpu;
1872 int thread_status_size;
1878 struct vm_area_struct {
1879 abi_ulong vma_start; /* start vaddr of memory region */
1880 abi_ulong vma_end; /* end vaddr of memory region */
1881 abi_ulong vma_flags; /* protection etc. flags for the region */
1882 TAILQ_ENTRY(vm_area_struct) vma_link;
1886 TAILQ_HEAD(, vm_area_struct) mm_mmap;
1887 int mm_count; /* number of mappings */
1890 static struct mm_struct *vma_init(void);
1891 static void vma_delete(struct mm_struct *);
1892 static int vma_add_mapping(struct mm_struct *, abi_ulong,
1893 abi_ulong, abi_ulong);
1894 static int vma_get_mapping_count(const struct mm_struct *);
1895 static struct vm_area_struct *vma_first(const struct mm_struct *);
1896 static struct vm_area_struct *vma_next(struct vm_area_struct *);
1897 static abi_ulong vma_dump_size(const struct vm_area_struct *);
1898 static int vma_walker(void *priv, unsigned long start, unsigned long end,
1899 unsigned long flags);
1901 static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
1902 static void fill_note(struct memelfnote *, const char *, int,
1903 unsigned int, void *);
1904 static void fill_prstatus(struct elf_prstatus *, const TaskState *, int);
1905 static int fill_psinfo(struct elf_prpsinfo *, const TaskState *);
1906 static void fill_auxv_note(struct memelfnote *, const TaskState *);
1907 static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
1908 static size_t note_size(const struct memelfnote *);
1909 static void free_note_info(struct elf_note_info *);
1910 static int fill_note_info(struct elf_note_info *, long, const CPUState *);
1911 static void fill_thread_info(struct elf_note_info *, const CPUState *);
1912 static int core_dump_filename(const TaskState *, char *, size_t);
1914 static int dump_write(int, const void *, size_t);
1915 static int write_note(struct memelfnote *, int);
1916 static int write_note_info(struct elf_note_info *, int);
1919 static void bswap_prstatus(struct elf_prstatus *);
1920 static void bswap_psinfo(struct elf_prpsinfo *);
1922 static void bswap_prstatus(struct elf_prstatus *prstatus)
1924 prstatus->pr_info.si_signo = tswapl(prstatus->pr_info.si_signo);
1925 prstatus->pr_info.si_code = tswapl(prstatus->pr_info.si_code);
1926 prstatus->pr_info.si_errno = tswapl(prstatus->pr_info.si_errno);
1927 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
1928 prstatus->pr_sigpend = tswapl(prstatus->pr_sigpend);
1929 prstatus->pr_sighold = tswapl(prstatus->pr_sighold);
1930 prstatus->pr_pid = tswap32(prstatus->pr_pid);
1931 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
1932 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
1933 prstatus->pr_sid = tswap32(prstatus->pr_sid);
1934 /* cpu times are not filled, so we skip them */
1935 /* regs should be in correct format already */
1936 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
1939 static void bswap_psinfo(struct elf_prpsinfo *psinfo)
1941 psinfo->pr_flag = tswapl(psinfo->pr_flag);
1942 psinfo->pr_uid = tswap16(psinfo->pr_uid);
1943 psinfo->pr_gid = tswap16(psinfo->pr_gid);
1944 psinfo->pr_pid = tswap32(psinfo->pr_pid);
1945 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
1946 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
1947 psinfo->pr_sid = tswap32(psinfo->pr_sid);
1949 #endif /* BSWAP_NEEDED */
1952 * Minimal support for linux memory regions. These are needed
1953 * when we are finding out what memory exactly belongs to
1954 * emulated process. No locks needed here, as long as
1955 * thread that received the signal is stopped.
1958 static struct mm_struct *vma_init(void)
1960 struct mm_struct *mm;
1962 if ((mm = qemu_malloc(sizeof (*mm))) == NULL)
1966 TAILQ_INIT(&mm->mm_mmap);
1971 static void vma_delete(struct mm_struct *mm)
1973 struct vm_area_struct *vma;
1975 while ((vma = vma_first(mm)) != NULL) {
1976 TAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
1982 static int vma_add_mapping(struct mm_struct *mm, abi_ulong start,
1983 abi_ulong end, abi_ulong flags)
1985 struct vm_area_struct *vma;
1987 if ((vma = qemu_mallocz(sizeof (*vma))) == NULL)
1990 vma->vma_start = start;
1992 vma->vma_flags = flags;
1994 TAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
2000 static struct vm_area_struct *vma_first(const struct mm_struct *mm)
2002 return (TAILQ_FIRST(&mm->mm_mmap));
2005 static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
2007 return (TAILQ_NEXT(vma, vma_link));
2010 static int vma_get_mapping_count(const struct mm_struct *mm)
2012 return (mm->mm_count);
2016 * Calculate file (dump) size of given memory region.
2018 static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
2020 /* if we cannot even read the first page, skip it */
2021 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
2025 * Usually we don't dump executable pages as they contain
2026 * non-writable code that debugger can read directly from
2027 * target library etc. However, thread stacks are marked
2028 * also executable so we read in first page of given region
2029 * and check whether it contains elf header. If there is
2030 * no elf header, we dump it.
2032 if (vma->vma_flags & PROT_EXEC) {
2033 char page[TARGET_PAGE_SIZE];
2035 copy_from_user(page, vma->vma_start, sizeof (page));
2036 if ((page[EI_MAG0] == ELFMAG0) &&
2037 (page[EI_MAG1] == ELFMAG1) &&
2038 (page[EI_MAG2] == ELFMAG2) &&
2039 (page[EI_MAG3] == ELFMAG3)) {
2041 * Mappings are possibly from ELF binary. Don't dump
2048 return (vma->vma_end - vma->vma_start);
2051 static int vma_walker(void *priv, unsigned long start, unsigned long end,
2052 unsigned long flags)
2054 struct mm_struct *mm = (struct mm_struct *)priv;
2057 * Don't dump anything that qemu has reserved for internal use.
2059 if (flags & PAGE_RESERVED)
2062 vma_add_mapping(mm, start, end, flags);
2066 static void fill_note(struct memelfnote *note, const char *name, int type,
2067 unsigned int sz, void *data)
2069 unsigned int namesz;
2071 namesz = strlen(name) + 1;
2073 note->namesz = namesz;
2074 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
2076 note->datasz = roundup(sz, sizeof (int32_t));;
2080 * We calculate rounded up note size here as specified by
2083 note->notesz = sizeof (struct elf_note) +
2084 note->namesz_rounded + note->datasz;
2087 static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
2090 (void) memset(elf, 0, sizeof(*elf));
2092 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
2093 elf->e_ident[EI_CLASS] = ELF_CLASS;
2094 elf->e_ident[EI_DATA] = ELF_DATA;
2095 elf->e_ident[EI_VERSION] = EV_CURRENT;
2096 elf->e_ident[EI_OSABI] = ELF_OSABI;
2098 elf->e_type = ET_CORE;
2099 elf->e_machine = machine;
2100 elf->e_version = EV_CURRENT;
2101 elf->e_phoff = sizeof(struct elfhdr);
2102 elf->e_flags = flags;
2103 elf->e_ehsize = sizeof(struct elfhdr);
2104 elf->e_phentsize = sizeof(struct elf_phdr);
2105 elf->e_phnum = segs;
2112 static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
2114 phdr->p_type = PT_NOTE;
2115 phdr->p_offset = offset;
2118 phdr->p_filesz = sz;
2128 static size_t note_size(const struct memelfnote *note)
2130 return (note->notesz);
2133 static void fill_prstatus(struct elf_prstatus *prstatus,
2134 const TaskState *ts, int signr)
2136 (void) memset(prstatus, 0, sizeof (*prstatus));
2137 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
2138 prstatus->pr_pid = ts->ts_tid;
2139 prstatus->pr_ppid = getppid();
2140 prstatus->pr_pgrp = getpgrp();
2141 prstatus->pr_sid = getsid(0);
2144 bswap_prstatus(prstatus);
2148 static int fill_psinfo(struct elf_prpsinfo *psinfo, const TaskState *ts)
2150 char *filename, *base_filename;
2151 unsigned int i, len;
2153 (void) memset(psinfo, 0, sizeof (*psinfo));
2155 len = ts->info->arg_end - ts->info->arg_start;
2156 if (len >= ELF_PRARGSZ)
2157 len = ELF_PRARGSZ - 1;
2158 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
2160 for (i = 0; i < len; i++)
2161 if (psinfo->pr_psargs[i] == 0)
2162 psinfo->pr_psargs[i] = ' ';
2163 psinfo->pr_psargs[len] = 0;
2165 psinfo->pr_pid = getpid();
2166 psinfo->pr_ppid = getppid();
2167 psinfo->pr_pgrp = getpgrp();
2168 psinfo->pr_sid = getsid(0);
2169 psinfo->pr_uid = getuid();
2170 psinfo->pr_gid = getgid();
2172 filename = strdup(ts->bprm->filename);
2173 base_filename = strdup(basename(filename));
2174 (void) strncpy(psinfo->pr_fname, base_filename,
2175 sizeof(psinfo->pr_fname));
2176 free(base_filename);
2180 bswap_psinfo(psinfo);
2185 static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
2187 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
2188 elf_addr_t orig_auxv = auxv;
2194 * Auxiliary vector is stored in target process stack. It contains
2195 * {type, value} pairs that we need to dump into note. This is not
2196 * strictly necessary but we do it here for sake of completeness.
2199 /* find out lenght of the vector, AT_NULL is terminator */
2202 get_user_ual(val, auxv);
2204 auxv += 2 * sizeof (elf_addr_t);
2205 } while (val != AT_NULL);
2206 len = i * sizeof (elf_addr_t);
2208 /* read in whole auxv vector and copy it to memelfnote */
2209 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
2211 fill_note(note, "CORE", NT_AUXV, len, ptr);
2212 unlock_user(ptr, auxv, len);
2217 * Constructs name of coredump file. We have following convention
2219 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
2221 * Returns 0 in case of success, -1 otherwise (errno is set).
2223 static int core_dump_filename(const TaskState *ts, char *buf,
2227 char *filename = NULL;
2228 char *base_filename = NULL;
2232 assert(bufsize >= PATH_MAX);
2234 if (gettimeofday(&tv, NULL) < 0) {
2235 (void) fprintf(stderr, "unable to get current timestamp: %s",
2240 filename = strdup(ts->bprm->filename);
2241 base_filename = strdup(basename(filename));
2242 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
2243 localtime_r(&tv.tv_sec, &tm));
2244 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
2245 base_filename, timestamp, (int)getpid());
2246 free(base_filename);
2252 static int dump_write(int fd, const void *ptr, size_t size)
2254 const char *bufp = (const char *)ptr;
2255 ssize_t bytes_written, bytes_left;
2256 struct rlimit dumpsize;
2260 getrlimit(RLIMIT_CORE, &dumpsize);
2261 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
2262 if (errno == ESPIPE) { /* not a seekable stream */
2268 if (dumpsize.rlim_cur <= pos) {
2270 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
2273 size_t limit_left=dumpsize.rlim_cur - pos;
2274 bytes_left = limit_left >= size ? size : limit_left ;
2279 * In normal conditions, single write(2) should do but
2280 * in case of socket etc. this mechanism is more portable.
2283 bytes_written = write(fd, bufp, bytes_left);
2284 if (bytes_written < 0) {
2288 } else if (bytes_written == 0) { /* eof */
2291 bufp += bytes_written;
2292 bytes_left -= bytes_written;
2293 } while (bytes_left > 0);
2298 static int write_note(struct memelfnote *men, int fd)
2302 en.n_namesz = men->namesz;
2303 en.n_type = men->type;
2304 en.n_descsz = men->datasz;
2310 if (dump_write(fd, &en, sizeof(en)) != 0)
2312 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
2314 if (dump_write(fd, men->data, men->datasz) != 0)
2320 static void fill_thread_info(struct elf_note_info *info, const CPUState *env)
2322 TaskState *ts = (TaskState *)env->opaque;
2323 struct elf_thread_status *ets;
2325 ets = qemu_mallocz(sizeof (*ets));
2326 ets->num_notes = 1; /* only prstatus is dumped */
2327 fill_prstatus(&ets->prstatus, ts, 0);
2328 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
2329 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
2332 TAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
2334 info->notes_size += note_size(&ets->notes[0]);
2337 static int fill_note_info(struct elf_note_info *info,
2338 long signr, const CPUState *env)
2341 CPUState *cpu = NULL;
2342 TaskState *ts = (TaskState *)env->opaque;
2345 (void) memset(info, 0, sizeof (*info));
2347 TAILQ_INIT(&info->thread_list);
2349 info->notes = qemu_mallocz(NUMNOTES * sizeof (struct memelfnote));
2350 if (info->notes == NULL)
2352 info->prstatus = qemu_mallocz(sizeof (*info->prstatus));
2353 if (info->prstatus == NULL)
2355 info->psinfo = qemu_mallocz(sizeof (*info->psinfo));
2356 if (info->prstatus == NULL)
2360 * First fill in status (and registers) of current thread
2361 * including process info & aux vector.
2363 fill_prstatus(info->prstatus, ts, signr);
2364 elf_core_copy_regs(&info->prstatus->pr_reg, env);
2365 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
2366 sizeof (*info->prstatus), info->prstatus);
2367 fill_psinfo(info->psinfo, ts);
2368 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
2369 sizeof (*info->psinfo), info->psinfo);
2370 fill_auxv_note(&info->notes[2], ts);
2373 info->notes_size = 0;
2374 for (i = 0; i < info->numnote; i++)
2375 info->notes_size += note_size(&info->notes[i]);
2377 /* read and fill status of all threads */
2379 for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) {
2380 if (cpu == thread_env)
2382 fill_thread_info(info, cpu);
2389 static void free_note_info(struct elf_note_info *info)
2391 struct elf_thread_status *ets;
2393 while (!TAILQ_EMPTY(&info->thread_list)) {
2394 ets = TAILQ_FIRST(&info->thread_list);
2395 TAILQ_REMOVE(&info->thread_list, ets, ets_link);
2399 qemu_free(info->prstatus);
2400 qemu_free(info->psinfo);
2401 qemu_free(info->notes);
2404 static int write_note_info(struct elf_note_info *info, int fd)
2406 struct elf_thread_status *ets;
2409 /* write prstatus, psinfo and auxv for current thread */
2410 for (i = 0; i < info->numnote; i++)
2411 if ((error = write_note(&info->notes[i], fd)) != 0)
2414 /* write prstatus for each thread */
2415 for (ets = info->thread_list.tqh_first; ets != NULL;
2416 ets = ets->ets_link.tqe_next) {
2417 if ((error = write_note(&ets->notes[0], fd)) != 0)
2425 * Write out ELF coredump.
2427 * See documentation of ELF object file format in:
2428 * http://www.caldera.com/developers/devspecs/gabi41.pdf
2430 * Coredump format in linux is following:
2432 * 0 +----------------------+ \
2433 * | ELF header | ET_CORE |
2434 * +----------------------+ |
2435 * | ELF program headers | |--- headers
2436 * | - NOTE section | |
2437 * | - PT_LOAD sections | |
2438 * +----------------------+ /
2443 * +----------------------+ <-- aligned to target page
2444 * | Process memory dump |
2449 * +----------------------+
2451 * NT_PRSTATUS -> struct elf_prstatus (per thread)
2452 * NT_PRSINFO -> struct elf_prpsinfo
2453 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
2455 * Format follows System V format as close as possible. Current
2456 * version limitations are as follows:
2457 * - no floating point registers are dumped
2459 * Function returns 0 in case of success, negative errno otherwise.
2461 * TODO: make this work also during runtime: it should be
2462 * possible to force coredump from running process and then
2463 * continue processing. For example qemu could set up SIGUSR2
2464 * handler (provided that target process haven't registered
2465 * handler for that) that does the dump when signal is received.
2467 static int elf_core_dump(int signr, const CPUState *env)
2469 const TaskState *ts = (const TaskState *)env->opaque;
2470 struct vm_area_struct *vma = NULL;
2471 char corefile[PATH_MAX];
2472 struct elf_note_info info;
2474 struct elf_phdr phdr;
2475 struct rlimit dumpsize;
2476 struct mm_struct *mm = NULL;
2477 off_t offset = 0, data_offset = 0;
2482 getrlimit(RLIMIT_CORE, &dumpsize);
2483 if (dumpsize.rlim_cur == 0)
2486 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
2489 if ((fd = open(corefile, O_WRONLY | O_CREAT,
2490 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
2494 * Walk through target process memory mappings and
2495 * set up structure containing this information. After
2496 * this point vma_xxx functions can be used.
2498 if ((mm = vma_init()) == NULL)
2501 walk_memory_regions(mm, vma_walker);
2502 segs = vma_get_mapping_count(mm);
2505 * Construct valid coredump ELF header. We also
2506 * add one more segment for notes.
2508 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
2509 if (dump_write(fd, &elf, sizeof (elf)) != 0)
2512 /* fill in in-memory version of notes */
2513 if (fill_note_info(&info, signr, env) < 0)
2516 offset += sizeof (elf); /* elf header */
2517 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
2519 /* write out notes program header */
2520 fill_elf_note_phdr(&phdr, info.notes_size, offset);
2522 offset += info.notes_size;
2523 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
2527 * ELF specification wants data to start at page boundary so
2530 offset = roundup(offset, ELF_EXEC_PAGESIZE);
2533 * Write program headers for memory regions mapped in
2534 * the target process.
2536 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
2537 (void) memset(&phdr, 0, sizeof (phdr));
2539 phdr.p_type = PT_LOAD;
2540 phdr.p_offset = offset;
2541 phdr.p_vaddr = vma->vma_start;
2543 phdr.p_filesz = vma_dump_size(vma);
2544 offset += phdr.p_filesz;
2545 phdr.p_memsz = vma->vma_end - vma->vma_start;
2546 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
2547 if (vma->vma_flags & PROT_WRITE)
2548 phdr.p_flags |= PF_W;
2549 if (vma->vma_flags & PROT_EXEC)
2550 phdr.p_flags |= PF_X;
2551 phdr.p_align = ELF_EXEC_PAGESIZE;
2553 dump_write(fd, &phdr, sizeof (phdr));
2557 * Next we write notes just after program headers. No
2558 * alignment needed here.
2560 if (write_note_info(&info, fd) < 0)
2563 /* align data to page boundary */
2564 data_offset = lseek(fd, 0, SEEK_CUR);
2565 data_offset = TARGET_PAGE_ALIGN(data_offset);
2566 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
2570 * Finally we can dump process memory into corefile as well.
2572 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
2576 end = vma->vma_start + vma_dump_size(vma);
2578 for (addr = vma->vma_start; addr < end;
2579 addr += TARGET_PAGE_SIZE) {
2580 char page[TARGET_PAGE_SIZE];
2584 * Read in page from target process memory and
2585 * write it to coredump file.
2587 error = copy_from_user(page, addr, sizeof (page));
2589 (void) fprintf(stderr, "unable to dump " TARGET_FMT_lx "\n",
2594 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
2600 free_note_info(&info);
2610 #endif /* USE_ELF_CORE_DUMP */
2612 static int load_aout_interp(void * exptr, int interp_fd)
2614 printf("a.out interpreter not yet supported\n");
2618 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
2620 init_thread(regs, infop);