1 /* This is the Linux kernel elf-loading code, ported into user space */
15 /* from personality.h */
18 * Flags for bug emulation.
20 * These occupy the top three bytes.
23 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
24 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors
27 MMAP_PAGE_ZERO = 0x0100000,
28 ADDR_COMPAT_LAYOUT = 0x0200000,
29 READ_IMPLIES_EXEC = 0x0400000,
30 ADDR_LIMIT_32BIT = 0x0800000,
31 SHORT_INODE = 0x1000000,
32 WHOLE_SECONDS = 0x2000000,
33 STICKY_TIMEOUTS = 0x4000000,
34 ADDR_LIMIT_3GB = 0x8000000,
40 * These go in the low byte. Avoid using the top bit, it will
41 * conflict with error returns.
45 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
46 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
47 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
48 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
49 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS |
50 WHOLE_SECONDS | SHORT_INODE,
51 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
52 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
53 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
55 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
56 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
58 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
59 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
60 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
61 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
63 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
64 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
65 PER_OSF4 = 0x000f, /* OSF/1 v4 */
71 * Return the base personality without flags.
73 #define personality(pers) (pers & PER_MASK)
75 /* this flag is uneffective under linux too, should be deleted */
77 #define MAP_DENYWRITE 0
80 /* should probably go in elf.h */
87 #define ELF_PLATFORM get_elf_platform()
89 static const char *get_elf_platform(void)
91 static char elf_platform[] = "i386";
92 int family = (global_env->cpuid_version >> 8) & 0xff;
96 elf_platform[1] = '0' + family;
100 #define ELF_HWCAP get_elf_hwcap()
102 static uint32_t get_elf_hwcap(void)
104 return global_env->cpuid_features;
108 #define ELF_START_MMAP 0x2aaaaab000ULL
109 #define elf_check_arch(x) ( ((x) == ELF_ARCH) )
111 #define ELF_CLASS ELFCLASS64
112 #define ELF_DATA ELFDATA2LSB
113 #define ELF_ARCH EM_X86_64
115 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
118 regs->rsp = infop->start_stack;
119 regs->rip = infop->entry;
124 #define ELF_START_MMAP 0x80000000
127 * This is used to ensure we don't load something for the wrong architecture.
129 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
132 * These are used to set parameters in the core dumps.
134 #define ELF_CLASS ELFCLASS32
135 #define ELF_DATA ELFDATA2LSB
136 #define ELF_ARCH EM_386
138 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
140 regs->esp = infop->start_stack;
141 regs->eip = infop->entry;
143 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
144 starts %edx contains a pointer to a function which might be
145 registered using `atexit'. This provides a mean for the
146 dynamic linker to call DT_FINI functions for shared libraries
147 that have been loaded before the code runs.
149 A value of 0 tells we have no such handler. */
154 #define USE_ELF_CORE_DUMP
155 #define ELF_EXEC_PAGESIZE 4096
161 #define ELF_START_MMAP 0x80000000
163 #define elf_check_arch(x) ( (x) == EM_ARM )
165 #define ELF_CLASS ELFCLASS32
166 #ifdef TARGET_WORDS_BIGENDIAN
167 #define ELF_DATA ELFDATA2MSB
169 #define ELF_DATA ELFDATA2LSB
171 #define ELF_ARCH EM_ARM
173 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
175 abi_long stack = infop->start_stack;
176 memset(regs, 0, sizeof(*regs));
177 regs->ARM_cpsr = 0x10;
178 if (infop->entry & 1)
179 regs->ARM_cpsr |= CPSR_T;
180 regs->ARM_pc = infop->entry & 0xfffffffe;
181 regs->ARM_sp = infop->start_stack;
182 regs->ARM_r2 = tgetl(stack + 8); /* envp */
183 regs->ARM_r1 = tgetl(stack + 4); /* envp */
184 /* XXX: it seems that r0 is zeroed after ! */
186 /* For uClinux PIC binaries. */
187 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
188 regs->ARM_r10 = infop->start_data;
191 #define USE_ELF_CORE_DUMP
192 #define ELF_EXEC_PAGESIZE 4096
196 ARM_HWCAP_ARM_SWP = 1 << 0,
197 ARM_HWCAP_ARM_HALF = 1 << 1,
198 ARM_HWCAP_ARM_THUMB = 1 << 2,
199 ARM_HWCAP_ARM_26BIT = 1 << 3,
200 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
201 ARM_HWCAP_ARM_FPA = 1 << 5,
202 ARM_HWCAP_ARM_VFP = 1 << 6,
203 ARM_HWCAP_ARM_EDSP = 1 << 7,
206 #define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
207 | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \
208 | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP)
213 #ifdef TARGET_SPARC64
215 #define ELF_START_MMAP 0x80000000
218 #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
220 #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
223 #define ELF_CLASS ELFCLASS64
224 #define ELF_DATA ELFDATA2MSB
225 #define ELF_ARCH EM_SPARCV9
227 #define STACK_BIAS 2047
229 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
234 regs->pc = infop->entry;
235 regs->npc = regs->pc + 4;
238 regs->u_regs[14] = infop->start_stack - 16 * 4;
240 if (personality(infop->personality) == PER_LINUX32)
241 regs->u_regs[14] = infop->start_stack - 16 * 4;
243 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
248 #define ELF_START_MMAP 0x80000000
250 #define elf_check_arch(x) ( (x) == EM_SPARC )
252 #define ELF_CLASS ELFCLASS32
253 #define ELF_DATA ELFDATA2MSB
254 #define ELF_ARCH EM_SPARC
256 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
259 regs->pc = infop->entry;
260 regs->npc = regs->pc + 4;
262 regs->u_regs[14] = infop->start_stack - 16 * 4;
270 #define ELF_START_MMAP 0x80000000
272 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
274 #define elf_check_arch(x) ( (x) == EM_PPC64 )
276 #define ELF_CLASS ELFCLASS64
280 #define elf_check_arch(x) ( (x) == EM_PPC )
282 #define ELF_CLASS ELFCLASS32
286 #ifdef TARGET_WORDS_BIGENDIAN
287 #define ELF_DATA ELFDATA2MSB
289 #define ELF_DATA ELFDATA2LSB
291 #define ELF_ARCH EM_PPC
294 * We need to put in some extra aux table entries to tell glibc what
295 * the cache block size is, so it can use the dcbz instruction safely.
297 #define AT_DCACHEBSIZE 19
298 #define AT_ICACHEBSIZE 20
299 #define AT_UCACHEBSIZE 21
300 /* A special ignored type value for PPC, for glibc compatibility. */
301 #define AT_IGNOREPPC 22
303 * The requirements here are:
304 * - keep the final alignment of sp (sp & 0xf)
305 * - make sure the 32-bit value at the first 16 byte aligned position of
306 * AUXV is greater than 16 for glibc compatibility.
307 * AT_IGNOREPPC is used for that.
308 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
309 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
311 #define DLINFO_ARCH_ITEMS 5
312 #define ARCH_DLINFO \
314 NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
315 NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
316 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
318 * Now handle glibc compatibility. \
320 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
321 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
324 static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
326 abi_ulong pos = infop->start_stack;
328 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
329 abi_ulong entry, toc;
332 _regs->msr = 1 << MSR_PR; /* Set user mode */
333 _regs->gpr[1] = infop->start_stack;
334 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
335 entry = ldq_raw(infop->entry) + infop->load_addr;
336 toc = ldq_raw(infop->entry + 8) + infop->load_addr;
338 infop->entry = entry;
340 _regs->nip = infop->entry;
341 /* Note that isn't exactly what regular kernel does
342 * but this is what the ABI wants and is needed to allow
343 * execution of PPC BSD programs.
345 _regs->gpr[3] = tgetl(pos);
346 pos += sizeof(abi_ulong);
348 for (tmp = 1; tmp != 0; pos += sizeof(abi_ulong))
353 #define USE_ELF_CORE_DUMP
354 #define ELF_EXEC_PAGESIZE 4096
360 #define ELF_START_MMAP 0x80000000
362 #define elf_check_arch(x) ( (x) == EM_MIPS )
365 #define ELF_CLASS ELFCLASS64
367 #define ELF_CLASS ELFCLASS32
369 #ifdef TARGET_WORDS_BIGENDIAN
370 #define ELF_DATA ELFDATA2MSB
372 #define ELF_DATA ELFDATA2LSB
374 #define ELF_ARCH EM_MIPS
376 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
378 regs->cp0_status = CP0St_UM;
379 regs->cp0_epc = infop->entry;
380 regs->regs[29] = infop->start_stack;
383 #define USE_ELF_CORE_DUMP
384 #define ELF_EXEC_PAGESIZE 4096
386 #endif /* TARGET_MIPS */
390 #define ELF_START_MMAP 0x80000000
392 #define elf_check_arch(x) ( (x) == EM_SH )
394 #define ELF_CLASS ELFCLASS32
395 #define ELF_DATA ELFDATA2LSB
396 #define ELF_ARCH EM_SH
398 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
400 /* Check other registers XXXXX */
401 regs->pc = infop->entry;
402 regs->regs[15] = infop->start_stack;
405 #define USE_ELF_CORE_DUMP
406 #define ELF_EXEC_PAGESIZE 4096
412 #define ELF_START_MMAP 0x80000000
414 #define elf_check_arch(x) ( (x) == EM_CRIS )
416 #define ELF_CLASS ELFCLASS32
417 #define ELF_DATA ELFDATA2LSB
418 #define ELF_ARCH EM_CRIS
420 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
422 regs->erp = infop->entry;
425 #define USE_ELF_CORE_DUMP
426 #define ELF_EXEC_PAGESIZE 8192
432 #define ELF_START_MMAP 0x80000000
434 #define elf_check_arch(x) ( (x) == EM_68K )
436 #define ELF_CLASS ELFCLASS32
437 #define ELF_DATA ELFDATA2MSB
438 #define ELF_ARCH EM_68K
440 /* ??? Does this need to do anything?
441 #define ELF_PLAT_INIT(_r) */
443 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
445 regs->usp = infop->start_stack;
447 regs->pc = infop->entry;
450 #define USE_ELF_CORE_DUMP
451 #define ELF_EXEC_PAGESIZE 8192
457 #define ELF_START_MMAP (0x30000000000ULL)
459 #define elf_check_arch(x) ( (x) == ELF_ARCH )
461 #define ELF_CLASS ELFCLASS64
462 #define ELF_DATA ELFDATA2MSB
463 #define ELF_ARCH EM_ALPHA
465 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
467 regs->pc = infop->entry;
469 regs->usp = infop->start_stack;
470 regs->unique = infop->start_data; /* ? */
471 printf("Set unique value to " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n",
472 regs->unique, infop->start_data);
475 #define USE_ELF_CORE_DUMP
476 #define ELF_EXEC_PAGESIZE 8192
478 #endif /* TARGET_ALPHA */
481 #define ELF_PLATFORM (NULL)
490 #define ELF_CLASS ELFCLASS32
492 #define bswaptls(ptr) bswap32s(ptr)
499 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
500 unsigned int a_text; /* length of text, in bytes */
501 unsigned int a_data; /* length of data, in bytes */
502 unsigned int a_bss; /* length of uninitialized data area, in bytes */
503 unsigned int a_syms; /* length of symbol table data in file, in bytes */
504 unsigned int a_entry; /* start address */
505 unsigned int a_trsize; /* length of relocation info for text, in bytes */
506 unsigned int a_drsize; /* length of relocation info for data, in bytes */
510 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
516 /* max code+data+bss space allocated to elf interpreter */
517 #define INTERP_MAP_SIZE (32 * 1024 * 1024)
519 /* max code+data+bss+brk space allocated to ET_DYN executables */
520 #define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
522 /* Necessary parameters */
523 #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
524 #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1))
525 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
527 #define INTERPRETER_NONE 0
528 #define INTERPRETER_AOUT 1
529 #define INTERPRETER_ELF 2
531 #define DLINFO_ITEMS 12
533 static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
538 extern unsigned long x86_stack_size;
540 static int load_aout_interp(void * exptr, int interp_fd);
543 static void bswap_ehdr(struct elfhdr *ehdr)
545 bswap16s(&ehdr->e_type); /* Object file type */
546 bswap16s(&ehdr->e_machine); /* Architecture */
547 bswap32s(&ehdr->e_version); /* Object file version */
548 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
549 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
550 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
551 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
552 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
553 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
554 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
555 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
556 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
557 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
560 static void bswap_phdr(struct elf_phdr *phdr)
562 bswap32s(&phdr->p_type); /* Segment type */
563 bswaptls(&phdr->p_offset); /* Segment file offset */
564 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
565 bswaptls(&phdr->p_paddr); /* Segment physical address */
566 bswaptls(&phdr->p_filesz); /* Segment size in file */
567 bswaptls(&phdr->p_memsz); /* Segment size in memory */
568 bswap32s(&phdr->p_flags); /* Segment flags */
569 bswaptls(&phdr->p_align); /* Segment alignment */
572 static void bswap_shdr(struct elf_shdr *shdr)
574 bswap32s(&shdr->sh_name);
575 bswap32s(&shdr->sh_type);
576 bswaptls(&shdr->sh_flags);
577 bswaptls(&shdr->sh_addr);
578 bswaptls(&shdr->sh_offset);
579 bswaptls(&shdr->sh_size);
580 bswap32s(&shdr->sh_link);
581 bswap32s(&shdr->sh_info);
582 bswaptls(&shdr->sh_addralign);
583 bswaptls(&shdr->sh_entsize);
586 static void bswap_sym(struct elf_sym *sym)
588 bswap32s(&sym->st_name);
589 bswaptls(&sym->st_value);
590 bswaptls(&sym->st_size);
591 bswap16s(&sym->st_shndx);
596 * 'copy_elf_strings()' copies argument/envelope strings from user
597 * memory to free pages in kernel mem. These are in a format ready
598 * to be put directly into the top of new user memory.
601 static abi_ulong copy_elf_strings(int argc,char ** argv, void **page,
604 char *tmp, *tmp1, *pag = NULL;
608 return 0; /* bullet-proofing */
613 fprintf(stderr, "VFS: argc is wrong");
619 if (p < len) { /* this shouldn't happen - 128kB */
625 offset = p % TARGET_PAGE_SIZE;
626 pag = (char *)page[p/TARGET_PAGE_SIZE];
628 pag = (char *)malloc(TARGET_PAGE_SIZE);
629 memset(pag, 0, TARGET_PAGE_SIZE);
630 page[p/TARGET_PAGE_SIZE] = pag;
635 if (len == 0 || offset == 0) {
636 *(pag + offset) = *tmp;
639 int bytes_to_copy = (len > offset) ? offset : len;
640 tmp -= bytes_to_copy;
642 offset -= bytes_to_copy;
643 len -= bytes_to_copy;
644 memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
651 static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm,
652 struct image_info *info)
654 abi_ulong stack_base, size, error;
657 /* Create enough stack to hold everything. If we don't use
658 * it for args, we'll use it for something else...
660 size = x86_stack_size;
661 if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE)
662 size = MAX_ARG_PAGES*TARGET_PAGE_SIZE;
663 error = target_mmap(0,
664 size + qemu_host_page_size,
665 PROT_READ | PROT_WRITE,
666 MAP_PRIVATE | MAP_ANONYMOUS,
672 /* we reserve one extra page at the top of the stack as guard */
673 target_mprotect(error + size, qemu_host_page_size, PROT_NONE);
675 stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
678 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
682 memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE);
685 stack_base += TARGET_PAGE_SIZE;
690 static void set_brk(abi_ulong start, abi_ulong end)
692 /* page-align the start and end addresses... */
693 start = HOST_PAGE_ALIGN(start);
694 end = HOST_PAGE_ALIGN(end);
697 if(target_mmap(start, end - start,
698 PROT_READ | PROT_WRITE | PROT_EXEC,
699 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0) == -1) {
700 perror("cannot mmap brk");
706 /* We need to explicitly zero any fractional pages after the data
707 section (i.e. bss). This would contain the junk from the file that
708 should not be in memory. */
709 static void padzero(abi_ulong elf_bss, abi_ulong last_bss)
713 if (elf_bss >= last_bss)
716 /* XXX: this is really a hack : if the real host page size is
717 smaller than the target page size, some pages after the end
718 of the file may not be mapped. A better fix would be to
719 patch target_mmap(), but it is more complicated as the file
720 size must be known */
721 if (qemu_real_host_page_size < qemu_host_page_size) {
722 abi_ulong end_addr, end_addr1;
723 end_addr1 = (elf_bss + qemu_real_host_page_size - 1) &
724 ~(qemu_real_host_page_size - 1);
725 end_addr = HOST_PAGE_ALIGN(elf_bss);
726 if (end_addr1 < end_addr) {
727 mmap((void *)g2h(end_addr1), end_addr - end_addr1,
728 PROT_READ|PROT_WRITE|PROT_EXEC,
729 MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
733 nbyte = elf_bss & (qemu_host_page_size-1);
735 nbyte = qemu_host_page_size - nbyte;
744 static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
745 struct elfhdr * exec,
748 abi_ulong interp_load_addr, int ibcs,
749 struct image_info *info)
753 abi_ulong u_platform;
754 const char *k_platform;
755 const int n = sizeof(elf_addr_t);
759 k_platform = ELF_PLATFORM;
761 size_t len = strlen(k_platform) + 1;
762 sp -= (len + n - 1) & ~(n - 1);
764 memcpy_to_target(sp, k_platform, len);
767 * Force 16 byte _final_ alignment here for generality.
769 sp = sp &~ (abi_ulong)15;
770 size = (DLINFO_ITEMS + 1) * 2;
773 #ifdef DLINFO_ARCH_ITEMS
774 size += DLINFO_ARCH_ITEMS * 2;
776 size += envc + argc + 2;
777 size += (!ibcs ? 3 : 1); /* argc itself */
780 sp -= 16 - (size & 15);
782 /* This is correct because Linux defines
783 * elf_addr_t as Elf32_Off / Elf64_Off
785 #if ELF_CLASS == ELFCLASS32
786 #define NEW_AUX_ENT(id, val) do { \
787 sp -= n; tput32(sp, val); \
788 sp -= n; tput32(sp, id); \
791 #define NEW_AUX_ENT(id, val) do { \
792 sp -= n; tput64(sp, val); \
793 sp -= n; tput64(sp, id); \
796 NEW_AUX_ENT (AT_NULL, 0);
798 /* There must be exactly DLINFO_ITEMS entries here. */
799 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff));
800 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
801 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
802 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
803 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr));
804 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
805 NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry);
806 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
807 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
808 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
809 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
810 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
812 NEW_AUX_ENT(AT_PLATFORM, u_platform);
815 * ARCH_DLINFO must come last so platform specific code can enforce
816 * special alignment requirements on the AUXV if necessary (eg. PPC).
822 sp = loader_build_argptr(envc, argc, sp, p, !ibcs);
827 static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex,
829 abi_ulong *interp_load_addr)
831 struct elf_phdr *elf_phdata = NULL;
832 struct elf_phdr *eppnt;
833 abi_ulong load_addr = 0;
834 int load_addr_set = 0;
836 abi_ulong last_bss, elf_bss;
845 bswap_ehdr(interp_elf_ex);
847 /* First of all, some simple consistency checks */
848 if ((interp_elf_ex->e_type != ET_EXEC &&
849 interp_elf_ex->e_type != ET_DYN) ||
850 !elf_check_arch(interp_elf_ex->e_machine)) {
851 return ~((abi_ulong)0UL);
855 /* Now read in all of the header information */
857 if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE)
858 return ~(abi_ulong)0UL;
860 elf_phdata = (struct elf_phdr *)
861 malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
864 return ~((abi_ulong)0UL);
867 * If the size of this structure has changed, then punt, since
868 * we will be doing the wrong thing.
870 if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) {
872 return ~((abi_ulong)0UL);
875 retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET);
877 retval = read(interpreter_fd,
879 sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
882 perror("load_elf_interp");
889 for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) {
894 if (interp_elf_ex->e_type == ET_DYN) {
895 /* in order to avoid hardcoding the interpreter load
896 address in qemu, we allocate a big enough memory zone */
897 error = target_mmap(0, INTERP_MAP_SIZE,
898 PROT_NONE, MAP_PRIVATE | MAP_ANON,
909 for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++)
910 if (eppnt->p_type == PT_LOAD) {
911 int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
916 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
917 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
918 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
919 if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) {
920 elf_type |= MAP_FIXED;
921 vaddr = eppnt->p_vaddr;
923 error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr),
924 eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr),
928 eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr));
932 close(interpreter_fd);
934 return ~((abi_ulong)0UL);
937 if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
943 * Find the end of the file mapping for this phdr, and keep
944 * track of the largest address we see for this.
946 k = load_addr + eppnt->p_vaddr + eppnt->p_filesz;
947 if (k > elf_bss) elf_bss = k;
950 * Do the same thing for the memory mapping - between
951 * elf_bss and last_bss is the bss section.
953 k = load_addr + eppnt->p_memsz + eppnt->p_vaddr;
954 if (k > last_bss) last_bss = k;
957 /* Now use mmap to map the library into memory. */
959 close(interpreter_fd);
962 * Now fill out the bss section. First pad the last page up
963 * to the page boundary, and then perform a mmap to make sure
964 * that there are zeromapped pages up to and including the last
967 padzero(elf_bss, last_bss);
968 elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */
970 /* Map the last of the bss segment */
971 if (last_bss > elf_bss) {
972 target_mmap(elf_bss, last_bss-elf_bss,
973 PROT_READ|PROT_WRITE|PROT_EXEC,
974 MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
978 *interp_load_addr = load_addr;
979 return ((abi_ulong) interp_elf_ex->e_entry) + load_addr;
982 /* Best attempt to load symbols from this ELF object. */
983 static void load_symbols(struct elfhdr *hdr, int fd)
986 struct elf_shdr sechdr, symtab, strtab;
989 #if (ELF_CLASS == ELFCLASS64)
990 // Disas uses 32 bit symbols
991 struct elf32_sym *syms32 = NULL;
995 lseek(fd, hdr->e_shoff, SEEK_SET);
996 for (i = 0; i < hdr->e_shnum; i++) {
997 if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr))
1000 bswap_shdr(&sechdr);
1002 if (sechdr.sh_type == SHT_SYMTAB) {
1004 lseek(fd, hdr->e_shoff
1005 + sizeof(sechdr) * sechdr.sh_link, SEEK_SET);
1006 if (read(fd, &strtab, sizeof(strtab))
1010 bswap_shdr(&strtab);
1015 return; /* Shouldn't happen... */
1018 /* Now know where the strtab and symtab are. Snarf them. */
1019 s = malloc(sizeof(*s));
1020 s->disas_symtab = malloc(symtab.sh_size);
1021 #if (ELF_CLASS == ELFCLASS64)
1022 syms32 = malloc(symtab.sh_size / sizeof(struct elf_sym)
1023 * sizeof(struct elf32_sym));
1025 s->disas_strtab = strings = malloc(strtab.sh_size);
1026 if (!s->disas_symtab || !s->disas_strtab)
1029 lseek(fd, symtab.sh_offset, SEEK_SET);
1030 if (read(fd, s->disas_symtab, symtab.sh_size) != symtab.sh_size)
1033 for (i = 0; i < symtab.sh_size / sizeof(struct elf_sym); i++) {
1035 bswap_sym(s->disas_symtab + sizeof(struct elf_sym)*i);
1037 #if (ELF_CLASS == ELFCLASS64)
1038 sym = s->disas_symtab + sizeof(struct elf_sym)*i;
1039 syms32[i].st_name = sym->st_name;
1040 syms32[i].st_info = sym->st_info;
1041 syms32[i].st_other = sym->st_other;
1042 syms32[i].st_shndx = sym->st_shndx;
1043 syms32[i].st_value = sym->st_value & 0xffffffff;
1044 syms32[i].st_size = sym->st_size & 0xffffffff;
1048 #if (ELF_CLASS == ELFCLASS64)
1049 free(s->disas_symtab);
1050 s->disas_symtab = syms32;
1052 lseek(fd, strtab.sh_offset, SEEK_SET);
1053 if (read(fd, strings, strtab.sh_size) != strtab.sh_size)
1055 s->disas_num_syms = symtab.sh_size / sizeof(struct elf_sym);
1060 int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
1061 struct image_info * info)
1063 struct elfhdr elf_ex;
1064 struct elfhdr interp_elf_ex;
1065 struct exec interp_ex;
1066 int interpreter_fd = -1; /* avoid warning */
1067 abi_ulong load_addr, load_bias;
1068 int load_addr_set = 0;
1069 unsigned int interpreter_type = INTERPRETER_NONE;
1070 unsigned char ibcs2_interpreter;
1072 abi_ulong mapped_addr;
1073 struct elf_phdr * elf_ppnt;
1074 struct elf_phdr *elf_phdata;
1075 abi_ulong elf_bss, k, elf_brk;
1077 char * elf_interpreter;
1078 abi_ulong elf_entry, interp_load_addr = 0;
1080 abi_ulong start_code, end_code, start_data, end_data;
1081 abi_ulong reloc_func_desc = 0;
1082 abi_ulong elf_stack;
1083 char passed_fileno[6];
1085 ibcs2_interpreter = 0;
1089 elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */
1091 bswap_ehdr(&elf_ex);
1094 /* First of all, some simple consistency checks */
1095 if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
1096 (! elf_check_arch(elf_ex.e_machine))) {
1100 bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
1101 bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p);
1102 bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p);
1107 /* Now read in all of the header information */
1108 elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum);
1109 if (elf_phdata == NULL) {
1113 retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET);
1115 retval = read(bprm->fd, (char *) elf_phdata,
1116 elf_ex.e_phentsize * elf_ex.e_phnum);
1120 perror("load_elf_binary");
1127 elf_ppnt = elf_phdata;
1128 for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) {
1129 bswap_phdr(elf_ppnt);
1132 elf_ppnt = elf_phdata;
1138 elf_stack = ~((abi_ulong)0UL);
1139 elf_interpreter = NULL;
1140 start_code = ~((abi_ulong)0UL);
1145 for(i=0;i < elf_ex.e_phnum; i++) {
1146 if (elf_ppnt->p_type == PT_INTERP) {
1147 if ( elf_interpreter != NULL )
1150 free(elf_interpreter);
1155 /* This is the program interpreter used for
1156 * shared libraries - for now assume that this
1157 * is an a.out format binary
1160 elf_interpreter = (char *)malloc(elf_ppnt->p_filesz);
1162 if (elf_interpreter == NULL) {
1168 retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET);
1170 retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz);
1173 perror("load_elf_binary2");
1177 /* If the program interpreter is one of these two,
1178 then assume an iBCS2 image. Otherwise assume
1179 a native linux image. */
1181 /* JRP - Need to add X86 lib dir stuff here... */
1183 if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 ||
1184 strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) {
1185 ibcs2_interpreter = 1;
1189 printf("Using ELF interpreter %s\n", elf_interpreter);
1192 retval = open(path(elf_interpreter), O_RDONLY);
1194 interpreter_fd = retval;
1197 perror(elf_interpreter);
1199 /* retval = -errno; */
1204 retval = lseek(interpreter_fd, 0, SEEK_SET);
1206 retval = read(interpreter_fd,bprm->buf,128);
1210 interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */
1211 interp_elf_ex=*((struct elfhdr *) bprm->buf); /* elf exec-header */
1214 perror("load_elf_binary3");
1217 free(elf_interpreter);
1225 /* Some simple consistency checks for the interpreter */
1226 if (elf_interpreter){
1227 interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT;
1229 /* Now figure out which format our binary is */
1230 if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) &&
1231 (N_MAGIC(interp_ex) != QMAGIC)) {
1232 interpreter_type = INTERPRETER_ELF;
1235 if (interp_elf_ex.e_ident[0] != 0x7f ||
1236 strncmp(&interp_elf_ex.e_ident[1], "ELF",3) != 0) {
1237 interpreter_type &= ~INTERPRETER_ELF;
1240 if (!interpreter_type) {
1241 free(elf_interpreter);
1248 /* OK, we are done with that, now set up the arg stuff,
1249 and then start this sucker up */
1254 if (interpreter_type == INTERPRETER_AOUT) {
1255 snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd);
1256 passed_p = passed_fileno;
1258 if (elf_interpreter) {
1259 bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p);
1264 if (elf_interpreter) {
1265 free(elf_interpreter);
1273 /* OK, This is the point of no return */
1276 info->start_mmap = (abi_ulong)ELF_START_MMAP;
1278 elf_entry = (abi_ulong) elf_ex.e_entry;
1280 /* Do this so that we can load the interpreter, if need be. We will
1281 change some of these later */
1283 bprm->p = setup_arg_pages(bprm->p, bprm, info);
1284 info->start_stack = bprm->p;
1286 /* Now we do a little grungy work by mmaping the ELF image into
1287 * the correct location in memory. At this point, we assume that
1288 * the image should be loaded at fixed address, not at a variable
1292 for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) {
1297 if (elf_ppnt->p_type != PT_LOAD)
1300 if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
1301 if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
1302 if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
1303 elf_flags = MAP_PRIVATE | MAP_DENYWRITE;
1304 if (elf_ex.e_type == ET_EXEC || load_addr_set) {
1305 elf_flags |= MAP_FIXED;
1306 } else if (elf_ex.e_type == ET_DYN) {
1307 /* Try and get dynamic programs out of the way of the default mmap
1308 base, as well as whatever program they might try to exec. This
1309 is because the brk will follow the loader, and is not movable. */
1310 /* NOTE: for qemu, we do a big mmap to get enough space
1311 without hardcoding any address */
1312 error = target_mmap(0, ET_DYN_MAP_SIZE,
1313 PROT_NONE, MAP_PRIVATE | MAP_ANON,
1319 load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr);
1322 error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr),
1323 (elf_ppnt->p_filesz +
1324 TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)),
1326 (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE),
1328 (elf_ppnt->p_offset -
1329 TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)));
1335 #ifdef LOW_ELF_STACK
1336 if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
1337 elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr);
1340 if (!load_addr_set) {
1342 load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset;
1343 if (elf_ex.e_type == ET_DYN) {
1344 load_bias += error -
1345 TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr);
1346 load_addr += load_bias;
1347 reloc_func_desc = load_bias;
1350 k = elf_ppnt->p_vaddr;
1355 k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz;
1358 if ((elf_ppnt->p_flags & PF_X) && end_code < k)
1362 k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz;
1363 if (k > elf_brk) elf_brk = k;
1366 elf_entry += load_bias;
1367 elf_bss += load_bias;
1368 elf_brk += load_bias;
1369 start_code += load_bias;
1370 end_code += load_bias;
1371 start_data += load_bias;
1372 end_data += load_bias;
1374 if (elf_interpreter) {
1375 if (interpreter_type & 1) {
1376 elf_entry = load_aout_interp(&interp_ex, interpreter_fd);
1378 else if (interpreter_type & 2) {
1379 elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd,
1382 reloc_func_desc = interp_load_addr;
1384 close(interpreter_fd);
1385 free(elf_interpreter);
1387 if (elf_entry == ~((abi_ulong)0UL)) {
1388 printf("Unable to load interpreter\n");
1398 load_symbols(&elf_ex, bprm->fd);
1400 if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd);
1401 info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX);
1403 #ifdef LOW_ELF_STACK
1404 info->start_stack = bprm->p = elf_stack - 4;
1406 bprm->p = create_elf_tables(bprm->p,
1410 load_addr, load_bias,
1412 (interpreter_type == INTERPRETER_AOUT ? 0 : 1),
1414 info->load_addr = reloc_func_desc;
1415 info->start_brk = info->brk = elf_brk;
1416 info->end_code = end_code;
1417 info->start_code = start_code;
1418 info->start_data = start_data;
1419 info->end_data = end_data;
1420 info->start_stack = bprm->p;
1422 /* Calling set_brk effectively mmaps the pages that we need for the bss and break
1424 set_brk(elf_bss, elf_brk);
1426 padzero(elf_bss, elf_brk);
1429 printf("(start_brk) %x\n" , info->start_brk);
1430 printf("(end_code) %x\n" , info->end_code);
1431 printf("(start_code) %x\n" , info->start_code);
1432 printf("(end_data) %x\n" , info->end_data);
1433 printf("(start_stack) %x\n" , info->start_stack);
1434 printf("(brk) %x\n" , info->brk);
1437 if ( info->personality == PER_SVR4 )
1439 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
1440 and some applications "depend" upon this behavior.
1441 Since we do not have the power to recompile these, we
1442 emulate the SVr4 behavior. Sigh. */
1443 mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
1444 MAP_FIXED | MAP_PRIVATE, -1, 0);
1447 info->entry = elf_entry;
1452 static int load_aout_interp(void * exptr, int interp_fd)
1454 printf("a.out interpreter not yet supported\n");
1458 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
1460 init_thread(regs, infop);