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
423 * We need to put in some extra aux table entries to tell glibc what
424 * the cache block size is, so it can use the dcbz instruction safely.
426 #define AT_DCACHEBSIZE 19
427 #define AT_ICACHEBSIZE 20
428 #define AT_UCACHEBSIZE 21
429 /* A special ignored type value for PPC, for glibc compatibility. */
430 #define AT_IGNOREPPC 22
432 * The requirements here are:
433 * - keep the final alignment of sp (sp & 0xf)
434 * - make sure the 32-bit value at the first 16 byte aligned position of
435 * AUXV is greater than 16 for glibc compatibility.
436 * AT_IGNOREPPC is used for that.
437 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
438 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
440 #define DLINFO_ARCH_ITEMS 5
441 #define ARCH_DLINFO \
443 NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
444 NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
445 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
447 * Now handle glibc compatibility. \
449 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
450 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
453 static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
455 abi_ulong pos = infop->start_stack;
457 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
458 abi_ulong entry, toc;
461 _regs->gpr[1] = infop->start_stack;
462 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
463 entry = ldq_raw(infop->entry) + infop->load_addr;
464 toc = ldq_raw(infop->entry + 8) + infop->load_addr;
466 infop->entry = entry;
468 _regs->nip = infop->entry;
469 /* Note that isn't exactly what regular kernel does
470 * but this is what the ABI wants and is needed to allow
471 * execution of PPC BSD programs.
473 /* FIXME - what to for failure of get_user()? */
474 get_user_ual(_regs->gpr[3], pos);
475 pos += sizeof(abi_ulong);
477 for (tmp = 1; tmp != 0; pos += sizeof(abi_ulong))
482 #define ELF_EXEC_PAGESIZE 4096
488 #define ELF_START_MMAP 0x80000000
490 #define elf_check_arch(x) ( (x) == EM_MIPS )
493 #define ELF_CLASS ELFCLASS64
495 #define ELF_CLASS ELFCLASS32
497 #ifdef TARGET_WORDS_BIGENDIAN
498 #define ELF_DATA ELFDATA2MSB
500 #define ELF_DATA ELFDATA2LSB
502 #define ELF_ARCH EM_MIPS
504 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
506 regs->cp0_status = 2 << CP0St_KSU;
507 regs->cp0_epc = infop->entry;
508 regs->regs[29] = infop->start_stack;
511 #define ELF_EXEC_PAGESIZE 4096
513 #endif /* TARGET_MIPS */
517 #define ELF_START_MMAP 0x80000000
519 #define elf_check_arch(x) ( (x) == EM_SH )
521 #define ELF_CLASS ELFCLASS32
522 #define ELF_DATA ELFDATA2LSB
523 #define ELF_ARCH EM_SH
525 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
527 /* Check other registers XXXXX */
528 regs->pc = infop->entry;
529 regs->regs[15] = infop->start_stack;
532 #define ELF_EXEC_PAGESIZE 4096
538 #define ELF_START_MMAP 0x80000000
540 #define elf_check_arch(x) ( (x) == EM_CRIS )
542 #define ELF_CLASS ELFCLASS32
543 #define ELF_DATA ELFDATA2LSB
544 #define ELF_ARCH EM_CRIS
546 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
548 regs->erp = infop->entry;
551 #define ELF_EXEC_PAGESIZE 8192
557 #define ELF_START_MMAP 0x80000000
559 #define elf_check_arch(x) ( (x) == EM_68K )
561 #define ELF_CLASS ELFCLASS32
562 #define ELF_DATA ELFDATA2MSB
563 #define ELF_ARCH EM_68K
565 /* ??? Does this need to do anything?
566 #define ELF_PLAT_INIT(_r) */
568 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
570 regs->usp = infop->start_stack;
572 regs->pc = infop->entry;
575 #define ELF_EXEC_PAGESIZE 8192
581 #define ELF_START_MMAP (0x30000000000ULL)
583 #define elf_check_arch(x) ( (x) == ELF_ARCH )
585 #define ELF_CLASS ELFCLASS64
586 #define ELF_DATA ELFDATA2MSB
587 #define ELF_ARCH EM_ALPHA
589 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
591 regs->pc = infop->entry;
593 regs->usp = infop->start_stack;
594 regs->unique = infop->start_data; /* ? */
595 printf("Set unique value to " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n",
596 regs->unique, infop->start_data);
599 #define ELF_EXEC_PAGESIZE 8192
601 #endif /* TARGET_ALPHA */
604 #define ELF_PLATFORM (NULL)
613 #define ELF_CLASS ELFCLASS32
615 #define bswaptls(ptr) bswap32s(ptr)
622 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
623 unsigned int a_text; /* length of text, in bytes */
624 unsigned int a_data; /* length of data, in bytes */
625 unsigned int a_bss; /* length of uninitialized data area, in bytes */
626 unsigned int a_syms; /* length of symbol table data in file, in bytes */
627 unsigned int a_entry; /* start address */
628 unsigned int a_trsize; /* length of relocation info for text, in bytes */
629 unsigned int a_drsize; /* length of relocation info for data, in bytes */
633 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
639 /* max code+data+bss space allocated to elf interpreter */
640 #define INTERP_MAP_SIZE (32 * 1024 * 1024)
642 /* max code+data+bss+brk space allocated to ET_DYN executables */
643 #define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
645 /* Necessary parameters */
646 #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
647 #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1))
648 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
650 #define INTERPRETER_NONE 0
651 #define INTERPRETER_AOUT 1
652 #define INTERPRETER_ELF 2
654 #define DLINFO_ITEMS 12
656 static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
661 static int load_aout_interp(void * exptr, int interp_fd);
664 static void bswap_ehdr(struct elfhdr *ehdr)
666 bswap16s(&ehdr->e_type); /* Object file type */
667 bswap16s(&ehdr->e_machine); /* Architecture */
668 bswap32s(&ehdr->e_version); /* Object file version */
669 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
670 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
671 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
672 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
673 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
674 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
675 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
676 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
677 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
678 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
681 static void bswap_phdr(struct elf_phdr *phdr)
683 bswap32s(&phdr->p_type); /* Segment type */
684 bswaptls(&phdr->p_offset); /* Segment file offset */
685 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
686 bswaptls(&phdr->p_paddr); /* Segment physical address */
687 bswaptls(&phdr->p_filesz); /* Segment size in file */
688 bswaptls(&phdr->p_memsz); /* Segment size in memory */
689 bswap32s(&phdr->p_flags); /* Segment flags */
690 bswaptls(&phdr->p_align); /* Segment alignment */
693 static void bswap_shdr(struct elf_shdr *shdr)
695 bswap32s(&shdr->sh_name);
696 bswap32s(&shdr->sh_type);
697 bswaptls(&shdr->sh_flags);
698 bswaptls(&shdr->sh_addr);
699 bswaptls(&shdr->sh_offset);
700 bswaptls(&shdr->sh_size);
701 bswap32s(&shdr->sh_link);
702 bswap32s(&shdr->sh_info);
703 bswaptls(&shdr->sh_addralign);
704 bswaptls(&shdr->sh_entsize);
707 static void bswap_sym(struct elf_sym *sym)
709 bswap32s(&sym->st_name);
710 bswaptls(&sym->st_value);
711 bswaptls(&sym->st_size);
712 bswap16s(&sym->st_shndx);
716 #ifdef USE_ELF_CORE_DUMP
717 static int elf_core_dump(int, const CPUState *);
720 static void bswap_note(struct elf_note *en)
722 bswaptls(&en->n_namesz);
723 bswaptls(&en->n_descsz);
724 bswaptls(&en->n_type);
726 #endif /* BSWAP_NEEDED */
728 #endif /* USE_ELF_CORE_DUMP */
731 * 'copy_elf_strings()' copies argument/envelope strings from user
732 * memory to free pages in kernel mem. These are in a format ready
733 * to be put directly into the top of new user memory.
736 static abi_ulong copy_elf_strings(int argc,char ** argv, void **page,
739 char *tmp, *tmp1, *pag = NULL;
743 return 0; /* bullet-proofing */
748 fprintf(stderr, "VFS: argc is wrong");
754 if (p < len) { /* this shouldn't happen - 128kB */
760 offset = p % TARGET_PAGE_SIZE;
761 pag = (char *)page[p/TARGET_PAGE_SIZE];
763 pag = (char *)malloc(TARGET_PAGE_SIZE);
764 memset(pag, 0, TARGET_PAGE_SIZE);
765 page[p/TARGET_PAGE_SIZE] = pag;
770 if (len == 0 || offset == 0) {
771 *(pag + offset) = *tmp;
774 int bytes_to_copy = (len > offset) ? offset : len;
775 tmp -= bytes_to_copy;
777 offset -= bytes_to_copy;
778 len -= bytes_to_copy;
779 memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
786 static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm,
787 struct image_info *info)
789 abi_ulong stack_base, size, error;
792 /* Create enough stack to hold everything. If we don't use
793 * it for args, we'll use it for something else...
795 size = x86_stack_size;
796 if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE)
797 size = MAX_ARG_PAGES*TARGET_PAGE_SIZE;
798 error = target_mmap(0,
799 size + qemu_host_page_size,
800 PROT_READ | PROT_WRITE,
801 MAP_PRIVATE | MAP_ANONYMOUS,
807 /* we reserve one extra page at the top of the stack as guard */
808 target_mprotect(error + size, qemu_host_page_size, PROT_NONE);
810 stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
813 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
816 /* FIXME - check return value of memcpy_to_target() for failure */
817 memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE);
820 stack_base += TARGET_PAGE_SIZE;
825 static void set_brk(abi_ulong start, abi_ulong end)
827 /* page-align the start and end addresses... */
828 start = HOST_PAGE_ALIGN(start);
829 end = HOST_PAGE_ALIGN(end);
832 if(target_mmap(start, end - start,
833 PROT_READ | PROT_WRITE | PROT_EXEC,
834 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0) == -1) {
835 perror("cannot mmap brk");
841 /* We need to explicitly zero any fractional pages after the data
842 section (i.e. bss). This would contain the junk from the file that
843 should not be in memory. */
844 static void padzero(abi_ulong elf_bss, abi_ulong last_bss)
848 if (elf_bss >= last_bss)
851 /* XXX: this is really a hack : if the real host page size is
852 smaller than the target page size, some pages after the end
853 of the file may not be mapped. A better fix would be to
854 patch target_mmap(), but it is more complicated as the file
855 size must be known */
856 if (qemu_real_host_page_size < qemu_host_page_size) {
857 abi_ulong end_addr, end_addr1;
858 end_addr1 = (elf_bss + qemu_real_host_page_size - 1) &
859 ~(qemu_real_host_page_size - 1);
860 end_addr = HOST_PAGE_ALIGN(elf_bss);
861 if (end_addr1 < end_addr) {
862 mmap((void *)g2h(end_addr1), end_addr - end_addr1,
863 PROT_READ|PROT_WRITE|PROT_EXEC,
864 MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
868 nbyte = elf_bss & (qemu_host_page_size-1);
870 nbyte = qemu_host_page_size - nbyte;
872 /* FIXME - what to do if put_user() fails? */
873 put_user_u8(0, elf_bss);
880 static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
881 struct elfhdr * exec,
884 abi_ulong interp_load_addr, int ibcs,
885 struct image_info *info)
889 abi_ulong u_platform;
890 const char *k_platform;
891 const int n = sizeof(elf_addr_t);
895 k_platform = ELF_PLATFORM;
897 size_t len = strlen(k_platform) + 1;
898 sp -= (len + n - 1) & ~(n - 1);
900 /* FIXME - check return value of memcpy_to_target() for failure */
901 memcpy_to_target(sp, k_platform, len);
904 * Force 16 byte _final_ alignment here for generality.
906 sp = sp &~ (abi_ulong)15;
907 size = (DLINFO_ITEMS + 1) * 2;
910 #ifdef DLINFO_ARCH_ITEMS
911 size += DLINFO_ARCH_ITEMS * 2;
913 size += envc + argc + 2;
914 size += (!ibcs ? 3 : 1); /* argc itself */
917 sp -= 16 - (size & 15);
919 /* This is correct because Linux defines
920 * elf_addr_t as Elf32_Off / Elf64_Off
922 #define NEW_AUX_ENT(id, val) do { \
923 sp -= n; put_user_ual(val, sp); \
924 sp -= n; put_user_ual(id, sp); \
927 NEW_AUX_ENT (AT_NULL, 0);
929 /* There must be exactly DLINFO_ITEMS entries here. */
930 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff));
931 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
932 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
933 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
934 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr));
935 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
936 NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry);
937 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
938 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
939 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
940 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
941 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
942 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
944 NEW_AUX_ENT(AT_PLATFORM, u_platform);
947 * ARCH_DLINFO must come last so platform specific code can enforce
948 * special alignment requirements on the AUXV if necessary (eg. PPC).
954 info->saved_auxv = sp;
956 sp = loader_build_argptr(envc, argc, sp, p, !ibcs);
961 static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex,
963 abi_ulong *interp_load_addr)
965 struct elf_phdr *elf_phdata = NULL;
966 struct elf_phdr *eppnt;
967 abi_ulong load_addr = 0;
968 int load_addr_set = 0;
970 abi_ulong last_bss, elf_bss;
979 bswap_ehdr(interp_elf_ex);
981 /* First of all, some simple consistency checks */
982 if ((interp_elf_ex->e_type != ET_EXEC &&
983 interp_elf_ex->e_type != ET_DYN) ||
984 !elf_check_arch(interp_elf_ex->e_machine)) {
985 return ~((abi_ulong)0UL);
989 /* Now read in all of the header information */
991 if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE)
992 return ~(abi_ulong)0UL;
994 elf_phdata = (struct elf_phdr *)
995 malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
998 return ~((abi_ulong)0UL);
1001 * If the size of this structure has changed, then punt, since
1002 * we will be doing the wrong thing.
1004 if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) {
1006 return ~((abi_ulong)0UL);
1009 retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET);
1011 retval = read(interpreter_fd,
1012 (char *) elf_phdata,
1013 sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
1016 perror("load_elf_interp");
1023 for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) {
1028 if (interp_elf_ex->e_type == ET_DYN) {
1029 /* in order to avoid hardcoding the interpreter load
1030 address in qemu, we allocate a big enough memory zone */
1031 error = target_mmap(0, INTERP_MAP_SIZE,
1032 PROT_NONE, MAP_PRIVATE | MAP_ANON,
1043 for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++)
1044 if (eppnt->p_type == PT_LOAD) {
1045 int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
1047 abi_ulong vaddr = 0;
1050 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
1051 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
1052 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
1053 if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) {
1054 elf_type |= MAP_FIXED;
1055 vaddr = eppnt->p_vaddr;
1057 error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr),
1058 eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr),
1062 eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr));
1066 close(interpreter_fd);
1068 return ~((abi_ulong)0UL);
1071 if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
1077 * Find the end of the file mapping for this phdr, and keep
1078 * track of the largest address we see for this.
1080 k = load_addr + eppnt->p_vaddr + eppnt->p_filesz;
1081 if (k > elf_bss) elf_bss = k;
1084 * Do the same thing for the memory mapping - between
1085 * elf_bss and last_bss is the bss section.
1087 k = load_addr + eppnt->p_memsz + eppnt->p_vaddr;
1088 if (k > last_bss) last_bss = k;
1091 /* Now use mmap to map the library into memory. */
1093 close(interpreter_fd);
1096 * Now fill out the bss section. First pad the last page up
1097 * to the page boundary, and then perform a mmap to make sure
1098 * that there are zeromapped pages up to and including the last
1101 padzero(elf_bss, last_bss);
1102 elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */
1104 /* Map the last of the bss segment */
1105 if (last_bss > elf_bss) {
1106 target_mmap(elf_bss, last_bss-elf_bss,
1107 PROT_READ|PROT_WRITE|PROT_EXEC,
1108 MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
1112 *interp_load_addr = load_addr;
1113 return ((abi_ulong) interp_elf_ex->e_entry) + load_addr;
1116 static int symfind(const void *s0, const void *s1)
1118 struct elf_sym *key = (struct elf_sym *)s0;
1119 struct elf_sym *sym = (struct elf_sym *)s1;
1121 if (key->st_value < sym->st_value) {
1123 } else if (key->st_value > sym->st_value + sym->st_size) {
1129 static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
1131 #if ELF_CLASS == ELFCLASS32
1132 struct elf_sym *syms = s->disas_symtab.elf32;
1134 struct elf_sym *syms = s->disas_symtab.elf64;
1139 struct elf_sym *sym;
1141 key.st_value = orig_addr;
1143 sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), symfind);
1145 return s->disas_strtab + sym->st_name;
1151 /* FIXME: This should use elf_ops.h */
1152 static int symcmp(const void *s0, const void *s1)
1154 struct elf_sym *sym0 = (struct elf_sym *)s0;
1155 struct elf_sym *sym1 = (struct elf_sym *)s1;
1156 return (sym0->st_value < sym1->st_value)
1158 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
1161 /* Best attempt to load symbols from this ELF object. */
1162 static void load_symbols(struct elfhdr *hdr, int fd)
1164 unsigned int i, nsyms;
1165 struct elf_shdr sechdr, symtab, strtab;
1168 struct elf_sym *syms;
1170 lseek(fd, hdr->e_shoff, SEEK_SET);
1171 for (i = 0; i < hdr->e_shnum; i++) {
1172 if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr))
1175 bswap_shdr(&sechdr);
1177 if (sechdr.sh_type == SHT_SYMTAB) {
1179 lseek(fd, hdr->e_shoff
1180 + sizeof(sechdr) * sechdr.sh_link, SEEK_SET);
1181 if (read(fd, &strtab, sizeof(strtab))
1185 bswap_shdr(&strtab);
1190 return; /* Shouldn't happen... */
1193 /* Now know where the strtab and symtab are. Snarf them. */
1194 s = malloc(sizeof(*s));
1195 syms = malloc(symtab.sh_size);
1198 s->disas_strtab = strings = malloc(strtab.sh_size);
1199 if (!s->disas_strtab)
1202 lseek(fd, symtab.sh_offset, SEEK_SET);
1203 if (read(fd, syms, symtab.sh_size) != symtab.sh_size)
1206 nsyms = symtab.sh_size / sizeof(struct elf_sym);
1211 bswap_sym(syms + i);
1213 // Throw away entries which we do not need.
1214 if (syms[i].st_shndx == SHN_UNDEF ||
1215 syms[i].st_shndx >= SHN_LORESERVE ||
1216 ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
1219 syms[i] = syms[nsyms];
1223 #if defined(TARGET_ARM) || defined (TARGET_MIPS)
1224 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
1225 syms[i].st_value &= ~(target_ulong)1;
1229 syms = realloc(syms, nsyms * sizeof(*syms));
1231 qsort(syms, nsyms, sizeof(*syms), symcmp);
1233 lseek(fd, strtab.sh_offset, SEEK_SET);
1234 if (read(fd, strings, strtab.sh_size) != strtab.sh_size)
1236 s->disas_num_syms = nsyms;
1237 #if ELF_CLASS == ELFCLASS32
1238 s->disas_symtab.elf32 = syms;
1239 s->lookup_symbol = lookup_symbolxx;
1241 s->disas_symtab.elf64 = syms;
1242 s->lookup_symbol = lookup_symbolxx;
1248 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
1249 struct image_info * info)
1251 struct elfhdr elf_ex;
1252 struct elfhdr interp_elf_ex;
1253 struct exec interp_ex;
1254 int interpreter_fd = -1; /* avoid warning */
1255 abi_ulong load_addr, load_bias;
1256 int load_addr_set = 0;
1257 unsigned int interpreter_type = INTERPRETER_NONE;
1258 unsigned char ibcs2_interpreter;
1260 abi_ulong mapped_addr;
1261 struct elf_phdr * elf_ppnt;
1262 struct elf_phdr *elf_phdata;
1263 abi_ulong elf_bss, k, elf_brk;
1265 char * elf_interpreter;
1266 abi_ulong elf_entry, interp_load_addr = 0;
1268 abi_ulong start_code, end_code, start_data, end_data;
1269 abi_ulong reloc_func_desc = 0;
1270 abi_ulong elf_stack;
1271 char passed_fileno[6];
1273 ibcs2_interpreter = 0;
1277 elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */
1279 bswap_ehdr(&elf_ex);
1282 /* First of all, some simple consistency checks */
1283 if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
1284 (! elf_check_arch(elf_ex.e_machine))) {
1288 bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
1289 bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p);
1290 bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p);
1295 /* Now read in all of the header information */
1296 elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum);
1297 if (elf_phdata == NULL) {
1301 retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET);
1303 retval = read(bprm->fd, (char *) elf_phdata,
1304 elf_ex.e_phentsize * elf_ex.e_phnum);
1308 perror("load_elf_binary");
1315 elf_ppnt = elf_phdata;
1316 for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) {
1317 bswap_phdr(elf_ppnt);
1320 elf_ppnt = elf_phdata;
1326 elf_stack = ~((abi_ulong)0UL);
1327 elf_interpreter = NULL;
1328 start_code = ~((abi_ulong)0UL);
1332 interp_ex.a_info = 0;
1334 for(i=0;i < elf_ex.e_phnum; i++) {
1335 if (elf_ppnt->p_type == PT_INTERP) {
1336 if ( elf_interpreter != NULL )
1339 free(elf_interpreter);
1344 /* This is the program interpreter used for
1345 * shared libraries - for now assume that this
1346 * is an a.out format binary
1349 elf_interpreter = (char *)malloc(elf_ppnt->p_filesz);
1351 if (elf_interpreter == NULL) {
1357 retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET);
1359 retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz);
1362 perror("load_elf_binary2");
1366 /* If the program interpreter is one of these two,
1367 then assume an iBCS2 image. Otherwise assume
1368 a native linux image. */
1370 /* JRP - Need to add X86 lib dir stuff here... */
1372 if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 ||
1373 strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) {
1374 ibcs2_interpreter = 1;
1378 printf("Using ELF interpreter %s\n", elf_interpreter);
1381 retval = open(path(elf_interpreter), O_RDONLY);
1383 interpreter_fd = retval;
1386 perror(elf_interpreter);
1388 /* retval = -errno; */
1393 retval = lseek(interpreter_fd, 0, SEEK_SET);
1395 retval = read(interpreter_fd,bprm->buf,128);
1399 interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */
1400 interp_elf_ex=*((struct elfhdr *) bprm->buf); /* elf exec-header */
1403 perror("load_elf_binary3");
1406 free(elf_interpreter);
1414 /* Some simple consistency checks for the interpreter */
1415 if (elf_interpreter){
1416 interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT;
1418 /* Now figure out which format our binary is */
1419 if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) &&
1420 (N_MAGIC(interp_ex) != QMAGIC)) {
1421 interpreter_type = INTERPRETER_ELF;
1424 if (interp_elf_ex.e_ident[0] != 0x7f ||
1425 strncmp((char *)&interp_elf_ex.e_ident[1], "ELF",3) != 0) {
1426 interpreter_type &= ~INTERPRETER_ELF;
1429 if (!interpreter_type) {
1430 free(elf_interpreter);
1437 /* OK, we are done with that, now set up the arg stuff,
1438 and then start this sucker up */
1443 if (interpreter_type == INTERPRETER_AOUT) {
1444 snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd);
1445 passed_p = passed_fileno;
1447 if (elf_interpreter) {
1448 bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p);
1453 if (elf_interpreter) {
1454 free(elf_interpreter);
1462 /* OK, This is the point of no return */
1465 info->start_mmap = (abi_ulong)ELF_START_MMAP;
1467 elf_entry = (abi_ulong) elf_ex.e_entry;
1469 #if defined(CONFIG_USE_GUEST_BASE)
1471 * In case where user has not explicitly set the guest_base, we
1472 * probe here that should we set it automatically.
1474 if (guest_base == 0) {
1476 * Go through ELF program header table and find out whether
1477 * any of the segments drop below our current mmap_min_addr and
1478 * in that case set guest_base to corresponding address.
1480 for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum;
1482 if (elf_ppnt->p_type != PT_LOAD)
1484 if (HOST_PAGE_ALIGN(elf_ppnt->p_vaddr) < mmap_min_addr) {
1485 guest_base = HOST_PAGE_ALIGN(mmap_min_addr);
1486 qemu_log("setting guest_base=0x%lx\n", guest_base);
1491 #endif /* CONFIG_USE_GUEST_BASE */
1493 /* Do this so that we can load the interpreter, if need be. We will
1494 change some of these later */
1496 bprm->p = setup_arg_pages(bprm->p, bprm, info);
1497 info->start_stack = bprm->p;
1499 /* Now we do a little grungy work by mmaping the ELF image into
1500 * the correct location in memory. At this point, we assume that
1501 * the image should be loaded at fixed address, not at a variable
1505 for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) {
1510 if (elf_ppnt->p_type != PT_LOAD)
1513 if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
1514 if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
1515 if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
1516 elf_flags = MAP_PRIVATE | MAP_DENYWRITE;
1517 if (elf_ex.e_type == ET_EXEC || load_addr_set) {
1518 elf_flags |= MAP_FIXED;
1519 } else if (elf_ex.e_type == ET_DYN) {
1520 /* Try and get dynamic programs out of the way of the default mmap
1521 base, as well as whatever program they might try to exec. This
1522 is because the brk will follow the loader, and is not movable. */
1523 /* NOTE: for qemu, we do a big mmap to get enough space
1524 without hardcoding any address */
1525 error = target_mmap(0, ET_DYN_MAP_SIZE,
1526 PROT_NONE, MAP_PRIVATE | MAP_ANON,
1532 load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr);
1535 error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr),
1536 (elf_ppnt->p_filesz +
1537 TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)),
1539 (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE),
1541 (elf_ppnt->p_offset -
1542 TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)));
1548 #ifdef LOW_ELF_STACK
1549 if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
1550 elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr);
1553 if (!load_addr_set) {
1555 load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset;
1556 if (elf_ex.e_type == ET_DYN) {
1557 load_bias += error -
1558 TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr);
1559 load_addr += load_bias;
1560 reloc_func_desc = load_bias;
1563 k = elf_ppnt->p_vaddr;
1568 k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz;
1571 if ((elf_ppnt->p_flags & PF_X) && end_code < k)
1575 k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz;
1576 if (k > elf_brk) elf_brk = k;
1579 elf_entry += load_bias;
1580 elf_bss += load_bias;
1581 elf_brk += load_bias;
1582 start_code += load_bias;
1583 end_code += load_bias;
1584 start_data += load_bias;
1585 end_data += load_bias;
1587 if (elf_interpreter) {
1588 if (interpreter_type & 1) {
1589 elf_entry = load_aout_interp(&interp_ex, interpreter_fd);
1591 else if (interpreter_type & 2) {
1592 elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd,
1595 reloc_func_desc = interp_load_addr;
1597 close(interpreter_fd);
1598 free(elf_interpreter);
1600 if (elf_entry == ~((abi_ulong)0UL)) {
1601 printf("Unable to load interpreter\n");
1610 if (qemu_log_enabled())
1611 load_symbols(&elf_ex, bprm->fd);
1613 if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd);
1614 info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX);
1616 #ifdef LOW_ELF_STACK
1617 info->start_stack = bprm->p = elf_stack - 4;
1619 bprm->p = create_elf_tables(bprm->p,
1623 load_addr, load_bias,
1625 (interpreter_type == INTERPRETER_AOUT ? 0 : 1),
1627 info->load_addr = reloc_func_desc;
1628 info->start_brk = info->brk = elf_brk;
1629 info->end_code = end_code;
1630 info->start_code = start_code;
1631 info->start_data = start_data;
1632 info->end_data = end_data;
1633 info->start_stack = bprm->p;
1635 /* Calling set_brk effectively mmaps the pages that we need for the bss and break
1637 set_brk(elf_bss, elf_brk);
1639 padzero(elf_bss, elf_brk);
1642 printf("(start_brk) %x\n" , info->start_brk);
1643 printf("(end_code) %x\n" , info->end_code);
1644 printf("(start_code) %x\n" , info->start_code);
1645 printf("(end_data) %x\n" , info->end_data);
1646 printf("(start_stack) %x\n" , info->start_stack);
1647 printf("(brk) %x\n" , info->brk);
1650 if ( info->personality == PER_SVR4 )
1652 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
1653 and some applications "depend" upon this behavior.
1654 Since we do not have the power to recompile these, we
1655 emulate the SVr4 behavior. Sigh. */
1656 mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
1657 MAP_FIXED | MAP_PRIVATE, -1, 0);
1660 info->entry = elf_entry;
1662 #ifdef USE_ELF_CORE_DUMP
1663 bprm->core_dump = &elf_core_dump;
1669 #ifdef USE_ELF_CORE_DUMP
1672 * Definitions to generate Intel SVR4-like core files.
1673 * These mostly have the same names as the SVR4 types with "elf_"
1674 * tacked on the front to prevent clashes with linux definitions,
1675 * and the typedef forms have been avoided. This is mostly like
1676 * the SVR4 structure, but more Linuxy, with things that Linux does
1677 * not support and which gdb doesn't really use excluded.
1679 * Fields we don't dump (their contents is zero) in linux-user qemu
1680 * are marked with XXX.
1682 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
1684 * Porting ELF coredump for target is (quite) simple process. First you
1685 * define ELF_USE_CORE_DUMP in target ELF code (where init_thread() for
1686 * the target resides):
1688 * #define USE_ELF_CORE_DUMP
1690 * Next you define type of register set used for dumping. ELF specification
1691 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
1693 * typedef <target_regtype> elf_greg_t;
1694 * #define ELF_NREG <number of registers>
1695 * typedef elf_greg_t elf_gregset_t[ELF_NREG];
1697 * Then define following types to match target types. Actual types can
1698 * be found from linux kernel (arch/<ARCH>/include/asm/posix_types.h):
1700 * typedef <target_uid_type> target_uid_t;
1701 * typedef <target_gid_type> target_gid_t;
1702 * typedef <target_pid_type> target_pid_t;
1704 * Last step is to implement target specific function that copies registers
1705 * from given cpu into just specified register set. Prototype is:
1707 * static void elf_core_copy_regs(elf_gregset_t *regs, const CPUState *env);
1710 * regs - copy register values into here (allocated and zeroed by caller)
1711 * env - copy registers from here
1713 * Example for ARM target is provided in this file.
1716 /* An ELF note in memory */
1720 size_t namesz_rounded;
1727 struct elf_siginfo {
1728 int si_signo; /* signal number */
1729 int si_code; /* extra code */
1730 int si_errno; /* errno */
1733 struct elf_prstatus {
1734 struct elf_siginfo pr_info; /* Info associated with signal */
1735 short pr_cursig; /* Current signal */
1736 target_ulong pr_sigpend; /* XXX */
1737 target_ulong pr_sighold; /* XXX */
1738 target_pid_t pr_pid;
1739 target_pid_t pr_ppid;
1740 target_pid_t pr_pgrp;
1741 target_pid_t pr_sid;
1742 struct target_timeval pr_utime; /* XXX User time */
1743 struct target_timeval pr_stime; /* XXX System time */
1744 struct target_timeval pr_cutime; /* XXX Cumulative user time */
1745 struct target_timeval pr_cstime; /* XXX Cumulative system time */
1746 elf_gregset_t pr_reg; /* GP registers */
1747 int pr_fpvalid; /* XXX */
1750 #define ELF_PRARGSZ (80) /* Number of chars for args */
1752 struct elf_prpsinfo {
1753 char pr_state; /* numeric process state */
1754 char pr_sname; /* char for pr_state */
1755 char pr_zomb; /* zombie */
1756 char pr_nice; /* nice val */
1757 target_ulong pr_flag; /* flags */
1758 target_uid_t pr_uid;
1759 target_gid_t pr_gid;
1760 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
1762 char pr_fname[16]; /* filename of executable */
1763 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
1766 /* Here is the structure in which status of each thread is captured. */
1767 struct elf_thread_status {
1768 TAILQ_ENTRY(elf_thread_status) ets_link;
1769 struct elf_prstatus prstatus; /* NT_PRSTATUS */
1771 elf_fpregset_t fpu; /* NT_PRFPREG */
1772 struct task_struct *thread;
1773 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
1775 struct memelfnote notes[1];
1779 struct elf_note_info {
1780 struct memelfnote *notes;
1781 struct elf_prstatus *prstatus; /* NT_PRSTATUS */
1782 struct elf_prpsinfo *psinfo; /* NT_PRPSINFO */
1784 TAILQ_HEAD(thread_list_head, elf_thread_status) thread_list;
1787 * Current version of ELF coredump doesn't support
1788 * dumping fp regs etc.
1790 elf_fpregset_t *fpu;
1791 elf_fpxregset_t *xfpu;
1792 int thread_status_size;
1798 struct vm_area_struct {
1799 abi_ulong vma_start; /* start vaddr of memory region */
1800 abi_ulong vma_end; /* end vaddr of memory region */
1801 abi_ulong vma_flags; /* protection etc. flags for the region */
1802 TAILQ_ENTRY(vm_area_struct) vma_link;
1806 TAILQ_HEAD(, vm_area_struct) mm_mmap;
1807 int mm_count; /* number of mappings */
1810 static struct mm_struct *vma_init(void);
1811 static void vma_delete(struct mm_struct *);
1812 static int vma_add_mapping(struct mm_struct *, abi_ulong,
1813 abi_ulong, abi_ulong);
1814 static int vma_get_mapping_count(const struct mm_struct *);
1815 static struct vm_area_struct *vma_first(const struct mm_struct *);
1816 static struct vm_area_struct *vma_next(struct vm_area_struct *);
1817 static abi_ulong vma_dump_size(const struct vm_area_struct *);
1818 static int vma_walker(void *priv, unsigned long start, unsigned long end,
1819 unsigned long flags);
1821 static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
1822 static void fill_note(struct memelfnote *, const char *, int,
1823 unsigned int, void *);
1824 static void fill_prstatus(struct elf_prstatus *, const TaskState *, int);
1825 static int fill_psinfo(struct elf_prpsinfo *, const TaskState *);
1826 static void fill_auxv_note(struct memelfnote *, const TaskState *);
1827 static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
1828 static size_t note_size(const struct memelfnote *);
1829 static void free_note_info(struct elf_note_info *);
1830 static int fill_note_info(struct elf_note_info *, long, const CPUState *);
1831 static void fill_thread_info(struct elf_note_info *, const CPUState *);
1832 static int core_dump_filename(const TaskState *, char *, size_t);
1834 static int dump_write(int, const void *, size_t);
1835 static int write_note(struct memelfnote *, int);
1836 static int write_note_info(struct elf_note_info *, int);
1839 static void bswap_prstatus(struct elf_prstatus *);
1840 static void bswap_psinfo(struct elf_prpsinfo *);
1842 static void bswap_prstatus(struct elf_prstatus *prstatus)
1844 prstatus->pr_info.si_signo = tswapl(prstatus->pr_info.si_signo);
1845 prstatus->pr_info.si_code = tswapl(prstatus->pr_info.si_code);
1846 prstatus->pr_info.si_errno = tswapl(prstatus->pr_info.si_errno);
1847 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
1848 prstatus->pr_sigpend = tswapl(prstatus->pr_sigpend);
1849 prstatus->pr_sighold = tswapl(prstatus->pr_sighold);
1850 prstatus->pr_pid = tswap32(prstatus->pr_pid);
1851 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
1852 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
1853 prstatus->pr_sid = tswap32(prstatus->pr_sid);
1854 /* cpu times are not filled, so we skip them */
1855 /* regs should be in correct format already */
1856 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
1859 static void bswap_psinfo(struct elf_prpsinfo *psinfo)
1861 psinfo->pr_flag = tswapl(psinfo->pr_flag);
1862 psinfo->pr_uid = tswap16(psinfo->pr_uid);
1863 psinfo->pr_gid = tswap16(psinfo->pr_gid);
1864 psinfo->pr_pid = tswap32(psinfo->pr_pid);
1865 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
1866 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
1867 psinfo->pr_sid = tswap32(psinfo->pr_sid);
1869 #endif /* BSWAP_NEEDED */
1872 * Minimal support for linux memory regions. These are needed
1873 * when we are finding out what memory exactly belongs to
1874 * emulated process. No locks needed here, as long as
1875 * thread that received the signal is stopped.
1878 static struct mm_struct *vma_init(void)
1880 struct mm_struct *mm;
1882 if ((mm = qemu_malloc(sizeof (*mm))) == NULL)
1886 TAILQ_INIT(&mm->mm_mmap);
1891 static void vma_delete(struct mm_struct *mm)
1893 struct vm_area_struct *vma;
1895 while ((vma = vma_first(mm)) != NULL) {
1896 TAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
1902 static int vma_add_mapping(struct mm_struct *mm, abi_ulong start,
1903 abi_ulong end, abi_ulong flags)
1905 struct vm_area_struct *vma;
1907 if ((vma = qemu_mallocz(sizeof (*vma))) == NULL)
1910 vma->vma_start = start;
1912 vma->vma_flags = flags;
1914 TAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
1920 static struct vm_area_struct *vma_first(const struct mm_struct *mm)
1922 return (TAILQ_FIRST(&mm->mm_mmap));
1925 static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
1927 return (TAILQ_NEXT(vma, vma_link));
1930 static int vma_get_mapping_count(const struct mm_struct *mm)
1932 return (mm->mm_count);
1936 * Calculate file (dump) size of given memory region.
1938 static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
1940 /* if we cannot even read the first page, skip it */
1941 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
1945 * Usually we don't dump executable pages as they contain
1946 * non-writable code that debugger can read directly from
1947 * target library etc. However, thread stacks are marked
1948 * also executable so we read in first page of given region
1949 * and check whether it contains elf header. If there is
1950 * no elf header, we dump it.
1952 if (vma->vma_flags & PROT_EXEC) {
1953 char page[TARGET_PAGE_SIZE];
1955 copy_from_user(page, vma->vma_start, sizeof (page));
1956 if ((page[EI_MAG0] == ELFMAG0) &&
1957 (page[EI_MAG1] == ELFMAG1) &&
1958 (page[EI_MAG2] == ELFMAG2) &&
1959 (page[EI_MAG3] == ELFMAG3)) {
1961 * Mappings are possibly from ELF binary. Don't dump
1968 return (vma->vma_end - vma->vma_start);
1971 static int vma_walker(void *priv, unsigned long start, unsigned long end,
1972 unsigned long flags)
1974 struct mm_struct *mm = (struct mm_struct *)priv;
1977 * Don't dump anything that qemu has reserved for internal use.
1979 if (flags & PAGE_RESERVED)
1982 vma_add_mapping(mm, start, end, flags);
1986 static void fill_note(struct memelfnote *note, const char *name, int type,
1987 unsigned int sz, void *data)
1989 unsigned int namesz;
1991 namesz = strlen(name) + 1;
1993 note->namesz = namesz;
1994 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
1996 note->datasz = roundup(sz, sizeof (int32_t));;
2000 * We calculate rounded up note size here as specified by
2003 note->notesz = sizeof (struct elf_note) +
2004 note->namesz_rounded + note->datasz;
2007 static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
2010 (void) memset(elf, 0, sizeof(*elf));
2012 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
2013 elf->e_ident[EI_CLASS] = ELF_CLASS;
2014 elf->e_ident[EI_DATA] = ELF_DATA;
2015 elf->e_ident[EI_VERSION] = EV_CURRENT;
2016 elf->e_ident[EI_OSABI] = ELF_OSABI;
2018 elf->e_type = ET_CORE;
2019 elf->e_machine = machine;
2020 elf->e_version = EV_CURRENT;
2021 elf->e_phoff = sizeof(struct elfhdr);
2022 elf->e_flags = flags;
2023 elf->e_ehsize = sizeof(struct elfhdr);
2024 elf->e_phentsize = sizeof(struct elf_phdr);
2025 elf->e_phnum = segs;
2032 static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
2034 phdr->p_type = PT_NOTE;
2035 phdr->p_offset = offset;
2038 phdr->p_filesz = sz;
2048 static size_t note_size(const struct memelfnote *note)
2050 return (note->notesz);
2053 static void fill_prstatus(struct elf_prstatus *prstatus,
2054 const TaskState *ts, int signr)
2056 (void) memset(prstatus, 0, sizeof (*prstatus));
2057 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
2058 prstatus->pr_pid = ts->ts_tid;
2059 prstatus->pr_ppid = getppid();
2060 prstatus->pr_pgrp = getpgrp();
2061 prstatus->pr_sid = getsid(0);
2064 bswap_prstatus(prstatus);
2068 static int fill_psinfo(struct elf_prpsinfo *psinfo, const TaskState *ts)
2070 char *filename, *base_filename;
2071 unsigned int i, len;
2073 (void) memset(psinfo, 0, sizeof (*psinfo));
2075 len = ts->info->arg_end - ts->info->arg_start;
2076 if (len >= ELF_PRARGSZ)
2077 len = ELF_PRARGSZ - 1;
2078 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
2080 for (i = 0; i < len; i++)
2081 if (psinfo->pr_psargs[i] == 0)
2082 psinfo->pr_psargs[i] = ' ';
2083 psinfo->pr_psargs[len] = 0;
2085 psinfo->pr_pid = getpid();
2086 psinfo->pr_ppid = getppid();
2087 psinfo->pr_pgrp = getpgrp();
2088 psinfo->pr_sid = getsid(0);
2089 psinfo->pr_uid = getuid();
2090 psinfo->pr_gid = getgid();
2092 filename = strdup(ts->bprm->filename);
2093 base_filename = strdup(basename(filename));
2094 (void) strncpy(psinfo->pr_fname, base_filename,
2095 sizeof(psinfo->pr_fname));
2096 free(base_filename);
2100 bswap_psinfo(psinfo);
2105 static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
2107 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
2108 elf_addr_t orig_auxv = auxv;
2114 * Auxiliary vector is stored in target process stack. It contains
2115 * {type, value} pairs that we need to dump into note. This is not
2116 * strictly necessary but we do it here for sake of completeness.
2119 /* find out lenght of the vector, AT_NULL is terminator */
2122 get_user_ual(val, auxv);
2124 auxv += 2 * sizeof (elf_addr_t);
2125 } while (val != AT_NULL);
2126 len = i * sizeof (elf_addr_t);
2128 /* read in whole auxv vector and copy it to memelfnote */
2129 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
2131 fill_note(note, "CORE", NT_AUXV, len, ptr);
2132 unlock_user(ptr, auxv, len);
2137 * Constructs name of coredump file. We have following convention
2139 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
2141 * Returns 0 in case of success, -1 otherwise (errno is set).
2143 static int core_dump_filename(const TaskState *ts, char *buf,
2147 char *filename = NULL;
2148 char *base_filename = NULL;
2152 assert(bufsize >= PATH_MAX);
2154 if (gettimeofday(&tv, NULL) < 0) {
2155 (void) fprintf(stderr, "unable to get current timestamp: %s",
2160 filename = strdup(ts->bprm->filename);
2161 base_filename = strdup(basename(filename));
2162 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
2163 localtime_r(&tv.tv_sec, &tm));
2164 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
2165 base_filename, timestamp, (int)getpid());
2166 free(base_filename);
2172 static int dump_write(int fd, const void *ptr, size_t size)
2174 const char *bufp = (const char *)ptr;
2175 ssize_t bytes_written, bytes_left;
2176 struct rlimit dumpsize;
2180 getrlimit(RLIMIT_CORE, &dumpsize);
2181 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
2182 if (errno == ESPIPE) { /* not a seekable stream */
2188 if (dumpsize.rlim_cur <= pos) {
2190 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
2193 size_t limit_left=dumpsize.rlim_cur - pos;
2194 bytes_left = limit_left >= size ? size : limit_left ;
2199 * In normal conditions, single write(2) should do but
2200 * in case of socket etc. this mechanism is more portable.
2203 bytes_written = write(fd, bufp, bytes_left);
2204 if (bytes_written < 0) {
2208 } else if (bytes_written == 0) { /* eof */
2211 bufp += bytes_written;
2212 bytes_left -= bytes_written;
2213 } while (bytes_left > 0);
2218 static int write_note(struct memelfnote *men, int fd)
2222 en.n_namesz = men->namesz;
2223 en.n_type = men->type;
2224 en.n_descsz = men->datasz;
2230 if (dump_write(fd, &en, sizeof(en)) != 0)
2232 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
2234 if (dump_write(fd, men->data, men->datasz) != 0)
2240 static void fill_thread_info(struct elf_note_info *info, const CPUState *env)
2242 TaskState *ts = (TaskState *)env->opaque;
2243 struct elf_thread_status *ets;
2245 ets = qemu_mallocz(sizeof (*ets));
2246 ets->num_notes = 1; /* only prstatus is dumped */
2247 fill_prstatus(&ets->prstatus, ts, 0);
2248 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
2249 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
2252 TAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
2254 info->notes_size += note_size(&ets->notes[0]);
2257 static int fill_note_info(struct elf_note_info *info,
2258 long signr, const CPUState *env)
2261 CPUState *cpu = NULL;
2262 TaskState *ts = (TaskState *)env->opaque;
2265 (void) memset(info, 0, sizeof (*info));
2267 TAILQ_INIT(&info->thread_list);
2269 info->notes = qemu_mallocz(NUMNOTES * sizeof (struct memelfnote));
2270 if (info->notes == NULL)
2272 info->prstatus = qemu_mallocz(sizeof (*info->prstatus));
2273 if (info->prstatus == NULL)
2275 info->psinfo = qemu_mallocz(sizeof (*info->psinfo));
2276 if (info->prstatus == NULL)
2280 * First fill in status (and registers) of current thread
2281 * including process info & aux vector.
2283 fill_prstatus(info->prstatus, ts, signr);
2284 elf_core_copy_regs(&info->prstatus->pr_reg, env);
2285 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
2286 sizeof (*info->prstatus), info->prstatus);
2287 fill_psinfo(info->psinfo, ts);
2288 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
2289 sizeof (*info->psinfo), info->psinfo);
2290 fill_auxv_note(&info->notes[2], ts);
2293 info->notes_size = 0;
2294 for (i = 0; i < info->numnote; i++)
2295 info->notes_size += note_size(&info->notes[i]);
2297 /* read and fill status of all threads */
2299 for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) {
2300 if (cpu == thread_env)
2302 fill_thread_info(info, cpu);
2309 static void free_note_info(struct elf_note_info *info)
2311 struct elf_thread_status *ets;
2313 while (!TAILQ_EMPTY(&info->thread_list)) {
2314 ets = TAILQ_FIRST(&info->thread_list);
2315 TAILQ_REMOVE(&info->thread_list, ets, ets_link);
2319 qemu_free(info->prstatus);
2320 qemu_free(info->psinfo);
2321 qemu_free(info->notes);
2324 static int write_note_info(struct elf_note_info *info, int fd)
2326 struct elf_thread_status *ets;
2329 /* write prstatus, psinfo and auxv for current thread */
2330 for (i = 0; i < info->numnote; i++)
2331 if ((error = write_note(&info->notes[i], fd)) != 0)
2334 /* write prstatus for each thread */
2335 for (ets = info->thread_list.tqh_first; ets != NULL;
2336 ets = ets->ets_link.tqe_next) {
2337 if ((error = write_note(&ets->notes[0], fd)) != 0)
2345 * Write out ELF coredump.
2347 * See documentation of ELF object file format in:
2348 * http://www.caldera.com/developers/devspecs/gabi41.pdf
2350 * Coredump format in linux is following:
2352 * 0 +----------------------+ \
2353 * | ELF header | ET_CORE |
2354 * +----------------------+ |
2355 * | ELF program headers | |--- headers
2356 * | - NOTE section | |
2357 * | - PT_LOAD sections | |
2358 * +----------------------+ /
2363 * +----------------------+ <-- aligned to target page
2364 * | Process memory dump |
2369 * +----------------------+
2371 * NT_PRSTATUS -> struct elf_prstatus (per thread)
2372 * NT_PRSINFO -> struct elf_prpsinfo
2373 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
2375 * Format follows System V format as close as possible. Current
2376 * version limitations are as follows:
2377 * - no floating point registers are dumped
2379 * Function returns 0 in case of success, negative errno otherwise.
2381 * TODO: make this work also during runtime: it should be
2382 * possible to force coredump from running process and then
2383 * continue processing. For example qemu could set up SIGUSR2
2384 * handler (provided that target process haven't registered
2385 * handler for that) that does the dump when signal is received.
2387 static int elf_core_dump(int signr, const CPUState *env)
2389 const TaskState *ts = (const TaskState *)env->opaque;
2390 struct vm_area_struct *vma = NULL;
2391 char corefile[PATH_MAX];
2392 struct elf_note_info info;
2394 struct elf_phdr phdr;
2395 struct rlimit dumpsize;
2396 struct mm_struct *mm = NULL;
2397 off_t offset = 0, data_offset = 0;
2402 getrlimit(RLIMIT_CORE, &dumpsize);
2403 if (dumpsize.rlim_cur == 0)
2406 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
2409 if ((fd = open(corefile, O_WRONLY | O_CREAT,
2410 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
2414 * Walk through target process memory mappings and
2415 * set up structure containing this information. After
2416 * this point vma_xxx functions can be used.
2418 if ((mm = vma_init()) == NULL)
2421 walk_memory_regions(mm, vma_walker);
2422 segs = vma_get_mapping_count(mm);
2425 * Construct valid coredump ELF header. We also
2426 * add one more segment for notes.
2428 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
2429 if (dump_write(fd, &elf, sizeof (elf)) != 0)
2432 /* fill in in-memory version of notes */
2433 if (fill_note_info(&info, signr, env) < 0)
2436 offset += sizeof (elf); /* elf header */
2437 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
2439 /* write out notes program header */
2440 fill_elf_note_phdr(&phdr, info.notes_size, offset);
2442 offset += info.notes_size;
2443 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
2447 * ELF specification wants data to start at page boundary so
2450 offset = roundup(offset, ELF_EXEC_PAGESIZE);
2453 * Write program headers for memory regions mapped in
2454 * the target process.
2456 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
2457 (void) memset(&phdr, 0, sizeof (phdr));
2459 phdr.p_type = PT_LOAD;
2460 phdr.p_offset = offset;
2461 phdr.p_vaddr = vma->vma_start;
2463 phdr.p_filesz = vma_dump_size(vma);
2464 offset += phdr.p_filesz;
2465 phdr.p_memsz = vma->vma_end - vma->vma_start;
2466 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
2467 if (vma->vma_flags & PROT_WRITE)
2468 phdr.p_flags |= PF_W;
2469 if (vma->vma_flags & PROT_EXEC)
2470 phdr.p_flags |= PF_X;
2471 phdr.p_align = ELF_EXEC_PAGESIZE;
2473 dump_write(fd, &phdr, sizeof (phdr));
2477 * Next we write notes just after program headers. No
2478 * alignment needed here.
2480 if (write_note_info(&info, fd) < 0)
2483 /* align data to page boundary */
2484 data_offset = lseek(fd, 0, SEEK_CUR);
2485 data_offset = TARGET_PAGE_ALIGN(data_offset);
2486 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
2490 * Finally we can dump process memory into corefile as well.
2492 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
2496 end = vma->vma_start + vma_dump_size(vma);
2498 for (addr = vma->vma_start; addr < end;
2499 addr += TARGET_PAGE_SIZE) {
2500 char page[TARGET_PAGE_SIZE];
2504 * Read in page from target process memory and
2505 * write it to coredump file.
2507 error = copy_from_user(page, addr, sizeof (page));
2509 (void) fprintf(stderr, "unable to dump " TARGET_FMT_lx "\n",
2514 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
2520 free_note_info(&info);
2530 #endif /* USE_ELF_CORE_DUMP */
2532 static int load_aout_interp(void * exptr, int interp_fd)
2534 printf("a.out interpreter not yet supported\n");
2538 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
2540 init_thread(regs, infop);