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- /* This is the Linux kernel elf-loading code, ported into user space */
- #include <stdio.h>
- #include <sys/types.h>
- #include <fcntl.h>
- #include <errno.h>
- #include <unistd.h>
- #include <sys/mman.h>
- #include <stdlib.h>
- #include <string.h>
- #include "qemu.h"
- #include "disas.h"
- #ifdef _ARCH_PPC64
- #undef ARCH_DLINFO
- #undef ELF_PLATFORM
- #undef ELF_HWCAP
- #undef ELF_CLASS
- #undef ELF_DATA
- #undef ELF_ARCH
- #endif
- /* from personality.h */
- /*
- * Flags for bug emulation.
- *
- * These occupy the top three bytes.
- */
- enum {
- ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
- FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors
- * (signal handling)
- */
- MMAP_PAGE_ZERO = 0x0100000,
- ADDR_COMPAT_LAYOUT = 0x0200000,
- READ_IMPLIES_EXEC = 0x0400000,
- ADDR_LIMIT_32BIT = 0x0800000,
- SHORT_INODE = 0x1000000,
- WHOLE_SECONDS = 0x2000000,
- STICKY_TIMEOUTS = 0x4000000,
- ADDR_LIMIT_3GB = 0x8000000,
- };
- /*
- * Personality types.
- *
- * These go in the low byte. Avoid using the top bit, it will
- * conflict with error returns.
- */
- enum {
- PER_LINUX = 0x0000,
- PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
- PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
- PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
- PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
- PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS |
- WHOLE_SECONDS | SHORT_INODE,
- PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
- PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
- PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
- PER_BSD = 0x0006,
- PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
- PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
- PER_LINUX32 = 0x0008,
- PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
- PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
- PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
- PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
- PER_RISCOS = 0x000c,
- PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
- PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
- PER_OSF4 = 0x000f, /* OSF/1 v4 */
- PER_HPUX = 0x0010,
- PER_MASK = 0x00ff,
- };
- /*
- * Return the base personality without flags.
- */
- #define personality(pers) (pers & PER_MASK)
- /* this flag is uneffective under linux too, should be deleted */
- #ifndef MAP_DENYWRITE
- #define MAP_DENYWRITE 0
- #endif
- /* should probably go in elf.h */
- #ifndef ELIBBAD
- #define ELIBBAD 80
- #endif
- #ifdef TARGET_I386
- #define ELF_PLATFORM get_elf_platform()
- static const char *get_elf_platform(void)
- {
- static char elf_platform[] = "i386";
- int family = (thread_env->cpuid_version >> 8) & 0xff;
- if (family > 6)
- family = 6;
- if (family >= 3)
- elf_platform[1] = '0' + family;
- return elf_platform;
- }
- #define ELF_HWCAP get_elf_hwcap()
- static uint32_t get_elf_hwcap(void)
- {
- return thread_env->cpuid_features;
- }
- #ifdef TARGET_X86_64
- #define ELF_START_MMAP 0x2aaaaab000ULL
- #define elf_check_arch(x) ( ((x) == ELF_ARCH) )
- #define ELF_CLASS ELFCLASS64
- #define ELF_DATA ELFDATA2LSB
- #define ELF_ARCH EM_X86_64
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- regs->rax = 0;
- regs->rsp = infop->start_stack;
- regs->rip = infop->entry;
- if (bsd_type == target_freebsd) {
- regs->rdi = infop->start_stack;
- }
- }
- #else
- #define ELF_START_MMAP 0x80000000
- /*
- * This is used to ensure we don't load something for the wrong architecture.
- */
- #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
- /*
- * These are used to set parameters in the core dumps.
- */
- #define ELF_CLASS ELFCLASS32
- #define ELF_DATA ELFDATA2LSB
- #define ELF_ARCH EM_386
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- regs->esp = infop->start_stack;
- regs->eip = infop->entry;
- /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
- starts %edx contains a pointer to a function which might be
- registered using `atexit'. This provides a mean for the
- dynamic linker to call DT_FINI functions for shared libraries
- that have been loaded before the code runs.
- A value of 0 tells we have no such handler. */
- regs->edx = 0;
- }
- #endif
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- #endif
- #ifdef TARGET_ARM
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ( (x) == EM_ARM )
- #define ELF_CLASS ELFCLASS32
- #ifdef TARGET_WORDS_BIGENDIAN
- #define ELF_DATA ELFDATA2MSB
- #else
- #define ELF_DATA ELFDATA2LSB
- #endif
- #define ELF_ARCH EM_ARM
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- abi_long stack = infop->start_stack;
- memset(regs, 0, sizeof(*regs));
- regs->ARM_cpsr = 0x10;
- if (infop->entry & 1)
- regs->ARM_cpsr |= CPSR_T;
- regs->ARM_pc = infop->entry & 0xfffffffe;
- regs->ARM_sp = infop->start_stack;
- /* FIXME - what to for failure of get_user()? */
- get_user_ual(regs->ARM_r2, stack + 8); /* envp */
- get_user_ual(regs->ARM_r1, stack + 4); /* envp */
- /* XXX: it seems that r0 is zeroed after ! */
- regs->ARM_r0 = 0;
- /* For uClinux PIC binaries. */
- /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
- regs->ARM_r10 = infop->start_data;
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- enum
- {
- ARM_HWCAP_ARM_SWP = 1 << 0,
- ARM_HWCAP_ARM_HALF = 1 << 1,
- ARM_HWCAP_ARM_THUMB = 1 << 2,
- ARM_HWCAP_ARM_26BIT = 1 << 3,
- ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
- ARM_HWCAP_ARM_FPA = 1 << 5,
- ARM_HWCAP_ARM_VFP = 1 << 6,
- ARM_HWCAP_ARM_EDSP = 1 << 7,
- };
- #define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
- | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \
- | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP)
- #endif
- #ifdef TARGET_SPARC
- #ifdef TARGET_SPARC64
- #define ELF_START_MMAP 0x80000000
- #ifndef TARGET_ABI32
- #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
- #else
- #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
- #endif
- #define ELF_CLASS ELFCLASS64
- #define ELF_DATA ELFDATA2MSB
- #define ELF_ARCH EM_SPARCV9
- #define STACK_BIAS 2047
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- #ifndef TARGET_ABI32
- regs->tstate = 0;
- #endif
- regs->pc = infop->entry;
- regs->npc = regs->pc + 4;
- regs->y = 0;
- #ifdef TARGET_ABI32
- regs->u_regs[14] = infop->start_stack - 16 * 4;
- #else
- if (personality(infop->personality) == PER_LINUX32)
- regs->u_regs[14] = infop->start_stack - 16 * 4;
- else {
- regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
- if (bsd_type == target_freebsd) {
- regs->u_regs[8] = infop->start_stack;
- regs->u_regs[11] = infop->start_stack;
- }
- }
- #endif
- }
- #else
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ( (x) == EM_SPARC )
- #define ELF_CLASS ELFCLASS32
- #define ELF_DATA ELFDATA2MSB
- #define ELF_ARCH EM_SPARC
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- regs->psr = 0;
- regs->pc = infop->entry;
- regs->npc = regs->pc + 4;
- regs->y = 0;
- regs->u_regs[14] = infop->start_stack - 16 * 4;
- }
- #endif
- #endif
- #ifdef TARGET_PPC
- #define ELF_START_MMAP 0x80000000
- #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
- #define elf_check_arch(x) ( (x) == EM_PPC64 )
- #define ELF_CLASS ELFCLASS64
- #else
- #define elf_check_arch(x) ( (x) == EM_PPC )
- #define ELF_CLASS ELFCLASS32
- #endif
- #ifdef TARGET_WORDS_BIGENDIAN
- #define ELF_DATA ELFDATA2MSB
- #else
- #define ELF_DATA ELFDATA2LSB
- #endif
- #define ELF_ARCH EM_PPC
- /*
- * We need to put in some extra aux table entries to tell glibc what
- * the cache block size is, so it can use the dcbz instruction safely.
- */
- #define AT_DCACHEBSIZE 19
- #define AT_ICACHEBSIZE 20
- #define AT_UCACHEBSIZE 21
- /* A special ignored type value for PPC, for glibc compatibility. */
- #define AT_IGNOREPPC 22
- /*
- * The requirements here are:
- * - keep the final alignment of sp (sp & 0xf)
- * - make sure the 32-bit value at the first 16 byte aligned position of
- * AUXV is greater than 16 for glibc compatibility.
- * AT_IGNOREPPC is used for that.
- * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
- * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
- */
- #define DLINFO_ARCH_ITEMS 5
- #define ARCH_DLINFO \
- do { \
- NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
- NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
- NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
- /* \
- * Now handle glibc compatibility. \
- */ \
- NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
- NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
- } while (0)
- static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
- {
- abi_ulong pos = infop->start_stack;
- abi_ulong tmp;
- #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
- abi_ulong entry, toc;
- #endif
- _regs->gpr[1] = infop->start_stack;
- #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
- entry = ldq_raw(infop->entry) + infop->load_addr;
- toc = ldq_raw(infop->entry + 8) + infop->load_addr;
- _regs->gpr[2] = toc;
- infop->entry = entry;
- #endif
- _regs->nip = infop->entry;
- /* Note that isn't exactly what regular kernel does
- * but this is what the ABI wants and is needed to allow
- * execution of PPC BSD programs.
- */
- /* FIXME - what to for failure of get_user()? */
- get_user_ual(_regs->gpr[3], pos);
- pos += sizeof(abi_ulong);
- _regs->gpr[4] = pos;
- for (tmp = 1; tmp != 0; pos += sizeof(abi_ulong))
- tmp = ldl(pos);
- _regs->gpr[5] = pos;
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- #endif
- #ifdef TARGET_MIPS
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ( (x) == EM_MIPS )
- #ifdef TARGET_MIPS64
- #define ELF_CLASS ELFCLASS64
- #else
- #define ELF_CLASS ELFCLASS32
- #endif
- #ifdef TARGET_WORDS_BIGENDIAN
- #define ELF_DATA ELFDATA2MSB
- #else
- #define ELF_DATA ELFDATA2LSB
- #endif
- #define ELF_ARCH EM_MIPS
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- regs->cp0_status = 2 << CP0St_KSU;
- regs->cp0_epc = infop->entry;
- regs->regs[29] = infop->start_stack;
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- #endif /* TARGET_MIPS */
- #ifdef TARGET_SH4
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ( (x) == EM_SH )
- #define ELF_CLASS ELFCLASS32
- #define ELF_DATA ELFDATA2LSB
- #define ELF_ARCH EM_SH
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- /* Check other registers XXXXX */
- regs->pc = infop->entry;
- regs->regs[15] = infop->start_stack;
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- #endif
- #ifdef TARGET_CRIS
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ( (x) == EM_CRIS )
- #define ELF_CLASS ELFCLASS32
- #define ELF_DATA ELFDATA2LSB
- #define ELF_ARCH EM_CRIS
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- regs->erp = infop->entry;
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 8192
- #endif
- #ifdef TARGET_M68K
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ( (x) == EM_68K )
- #define ELF_CLASS ELFCLASS32
- #define ELF_DATA ELFDATA2MSB
- #define ELF_ARCH EM_68K
- /* ??? Does this need to do anything?
- #define ELF_PLAT_INIT(_r) */
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- regs->usp = infop->start_stack;
- regs->sr = 0;
- regs->pc = infop->entry;
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 8192
- #endif
- #ifdef TARGET_ALPHA
- #define ELF_START_MMAP (0x30000000000ULL)
- #define elf_check_arch(x) ( (x) == ELF_ARCH )
- #define ELF_CLASS ELFCLASS64
- #define ELF_DATA ELFDATA2MSB
- #define ELF_ARCH EM_ALPHA
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- regs->pc = infop->entry;
- regs->ps = 8;
- regs->usp = infop->start_stack;
- regs->unique = infop->start_data; /* ? */
- printf("Set unique value to " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n",
- regs->unique, infop->start_data);
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 8192
- #endif /* TARGET_ALPHA */
- #ifndef ELF_PLATFORM
- #define ELF_PLATFORM (NULL)
- #endif
- #ifndef ELF_HWCAP
- #define ELF_HWCAP 0
- #endif
- #ifdef TARGET_ABI32
- #undef ELF_CLASS
- #define ELF_CLASS ELFCLASS32
- #undef bswaptls
- #define bswaptls(ptr) bswap32s(ptr)
- #endif
- #include "elf.h"
- struct exec
- {
- unsigned int a_info; /* Use macros N_MAGIC, etc for access */
- unsigned int a_text; /* length of text, in bytes */
- unsigned int a_data; /* length of data, in bytes */
- unsigned int a_bss; /* length of uninitialized data area, in bytes */
- unsigned int a_syms; /* length of symbol table data in file, in bytes */
- unsigned int a_entry; /* start address */
- unsigned int a_trsize; /* length of relocation info for text, in bytes */
- unsigned int a_drsize; /* length of relocation info for data, in bytes */
- };
- #define N_MAGIC(exec) ((exec).a_info & 0xffff)
- #define OMAGIC 0407
- #define NMAGIC 0410
- #define ZMAGIC 0413
- #define QMAGIC 0314
- /* max code+data+bss space allocated to elf interpreter */
- #define INTERP_MAP_SIZE (32 * 1024 * 1024)
- /* max code+data+bss+brk space allocated to ET_DYN executables */
- #define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
- /* Necessary parameters */
- #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
- #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1))
- #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
- #define INTERPRETER_NONE 0
- #define INTERPRETER_AOUT 1
- #define INTERPRETER_ELF 2
- #define DLINFO_ITEMS 12
- static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
- {
- memcpy(to, from, n);
- }
- static int load_aout_interp(void * exptr, int interp_fd);
- #ifdef BSWAP_NEEDED
- static void bswap_ehdr(struct elfhdr *ehdr)
- {
- bswap16s(&ehdr->e_type); /* Object file type */
- bswap16s(&ehdr->e_machine); /* Architecture */
- bswap32s(&ehdr->e_version); /* Object file version */
- bswaptls(&ehdr->e_entry); /* Entry point virtual address */
- bswaptls(&ehdr->e_phoff); /* Program header table file offset */
- bswaptls(&ehdr->e_shoff); /* Section header table file offset */
- bswap32s(&ehdr->e_flags); /* Processor-specific flags */
- bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
- bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
- bswap16s(&ehdr->e_phnum); /* Program header table entry count */
- bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
- bswap16s(&ehdr->e_shnum); /* Section header table entry count */
- bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
- }
- static void bswap_phdr(struct elf_phdr *phdr)
- {
- bswap32s(&phdr->p_type); /* Segment type */
- bswaptls(&phdr->p_offset); /* Segment file offset */
- bswaptls(&phdr->p_vaddr); /* Segment virtual address */
- bswaptls(&phdr->p_paddr); /* Segment physical address */
- bswaptls(&phdr->p_filesz); /* Segment size in file */
- bswaptls(&phdr->p_memsz); /* Segment size in memory */
- bswap32s(&phdr->p_flags); /* Segment flags */
- bswaptls(&phdr->p_align); /* Segment alignment */
- }
- static void bswap_shdr(struct elf_shdr *shdr)
- {
- bswap32s(&shdr->sh_name);
- bswap32s(&shdr->sh_type);
- bswaptls(&shdr->sh_flags);
- bswaptls(&shdr->sh_addr);
- bswaptls(&shdr->sh_offset);
- bswaptls(&shdr->sh_size);
- bswap32s(&shdr->sh_link);
- bswap32s(&shdr->sh_info);
- bswaptls(&shdr->sh_addralign);
- bswaptls(&shdr->sh_entsize);
- }
- static void bswap_sym(struct elf_sym *sym)
- {
- bswap32s(&sym->st_name);
- bswaptls(&sym->st_value);
- bswaptls(&sym->st_size);
- bswap16s(&sym->st_shndx);
- }
- #endif
- /*
- * 'copy_elf_strings()' copies argument/envelope strings from user
- * memory to free pages in kernel mem. These are in a format ready
- * to be put directly into the top of new user memory.
- *
- */
- static abi_ulong copy_elf_strings(int argc,char ** argv, void **page,
- abi_ulong p)
- {
- char *tmp, *tmp1, *pag = NULL;
- int len, offset = 0;
- if (!p) {
- return 0; /* bullet-proofing */
- }
- while (argc-- > 0) {
- tmp = argv[argc];
- if (!tmp) {
- fprintf(stderr, "VFS: argc is wrong");
- exit(-1);
- }
- tmp1 = tmp;
- while (*tmp++);
- len = tmp - tmp1;
- if (p < len) { /* this shouldn't happen - 128kB */
- return 0;
- }
- while (len) {
- --p; --tmp; --len;
- if (--offset < 0) {
- offset = p % TARGET_PAGE_SIZE;
- pag = (char *)page[p/TARGET_PAGE_SIZE];
- if (!pag) {
- pag = g_try_malloc0(TARGET_PAGE_SIZE);
- page[p/TARGET_PAGE_SIZE] = pag;
- if (!pag)
- return 0;
- }
- }
- if (len == 0 || offset == 0) {
- *(pag + offset) = *tmp;
- }
- else {
- int bytes_to_copy = (len > offset) ? offset : len;
- tmp -= bytes_to_copy;
- p -= bytes_to_copy;
- offset -= bytes_to_copy;
- len -= bytes_to_copy;
- memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
- }
- }
- }
- return p;
- }
- static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm,
- struct image_info *info)
- {
- abi_ulong stack_base, size, error;
- int i;
- /* Create enough stack to hold everything. If we don't use
- * it for args, we'll use it for something else...
- */
- size = x86_stack_size;
- if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE)
- size = MAX_ARG_PAGES*TARGET_PAGE_SIZE;
- error = target_mmap(0,
- size + qemu_host_page_size,
- PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANON,
- -1, 0);
- if (error == -1) {
- perror("stk mmap");
- exit(-1);
- }
- /* we reserve one extra page at the top of the stack as guard */
- target_mprotect(error + size, qemu_host_page_size, PROT_NONE);
- stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
- p += stack_base;
- for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
- if (bprm->page[i]) {
- info->rss++;
- /* FIXME - check return value of memcpy_to_target() for failure */
- memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE);
- g_free(bprm->page[i]);
- }
- stack_base += TARGET_PAGE_SIZE;
- }
- return p;
- }
- static void set_brk(abi_ulong start, abi_ulong end)
- {
- /* page-align the start and end addresses... */
- start = HOST_PAGE_ALIGN(start);
- end = HOST_PAGE_ALIGN(end);
- if (end <= start)
- return;
- if(target_mmap(start, end - start,
- PROT_READ | PROT_WRITE | PROT_EXEC,
- MAP_FIXED | MAP_PRIVATE | MAP_ANON, -1, 0) == -1) {
- perror("cannot mmap brk");
- exit(-1);
- }
- }
- /* We need to explicitly zero any fractional pages after the data
- section (i.e. bss). This would contain the junk from the file that
- should not be in memory. */
- static void padzero(abi_ulong elf_bss, abi_ulong last_bss)
- {
- abi_ulong nbyte;
- if (elf_bss >= last_bss)
- return;
- /* XXX: this is really a hack : if the real host page size is
- smaller than the target page size, some pages after the end
- of the file may not be mapped. A better fix would be to
- patch target_mmap(), but it is more complicated as the file
- size must be known */
- if (qemu_real_host_page_size < qemu_host_page_size) {
- abi_ulong end_addr, end_addr1;
- end_addr1 = (elf_bss + qemu_real_host_page_size - 1) &
- ~(qemu_real_host_page_size - 1);
- end_addr = HOST_PAGE_ALIGN(elf_bss);
- if (end_addr1 < end_addr) {
- mmap((void *)g2h(end_addr1), end_addr - end_addr1,
- PROT_READ|PROT_WRITE|PROT_EXEC,
- MAP_FIXED|MAP_PRIVATE|MAP_ANON, -1, 0);
- }
- }
- nbyte = elf_bss & (qemu_host_page_size-1);
- if (nbyte) {
- nbyte = qemu_host_page_size - nbyte;
- do {
- /* FIXME - what to do if put_user() fails? */
- put_user_u8(0, elf_bss);
- elf_bss++;
- } while (--nbyte);
- }
- }
- static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
- struct elfhdr * exec,
- abi_ulong load_addr,
- abi_ulong load_bias,
- abi_ulong interp_load_addr, int ibcs,
- struct image_info *info)
- {
- abi_ulong sp;
- int size;
- abi_ulong u_platform;
- const char *k_platform;
- const int n = sizeof(elf_addr_t);
- sp = p;
- u_platform = 0;
- k_platform = ELF_PLATFORM;
- if (k_platform) {
- size_t len = strlen(k_platform) + 1;
- sp -= (len + n - 1) & ~(n - 1);
- u_platform = sp;
- /* FIXME - check return value of memcpy_to_target() for failure */
- memcpy_to_target(sp, k_platform, len);
- }
- /*
- * Force 16 byte _final_ alignment here for generality.
- */
- sp = sp &~ (abi_ulong)15;
- size = (DLINFO_ITEMS + 1) * 2;
- if (k_platform)
- size += 2;
- #ifdef DLINFO_ARCH_ITEMS
- size += DLINFO_ARCH_ITEMS * 2;
- #endif
- size += envc + argc + 2;
- size += (!ibcs ? 3 : 1); /* argc itself */
- size *= n;
- if (size & 15)
- sp -= 16 - (size & 15);
- /* This is correct because Linux defines
- * elf_addr_t as Elf32_Off / Elf64_Off
- */
- #define NEW_AUX_ENT(id, val) do { \
- sp -= n; put_user_ual(val, sp); \
- sp -= n; put_user_ual(id, sp); \
- } while(0)
- NEW_AUX_ENT (AT_NULL, 0);
- /* There must be exactly DLINFO_ITEMS entries here. */
- NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff));
- NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
- NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
- NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
- NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr));
- NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
- NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry);
- NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
- NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
- NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
- NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
- NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
- NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
- if (k_platform)
- NEW_AUX_ENT(AT_PLATFORM, u_platform);
- #ifdef ARCH_DLINFO
- /*
- * ARCH_DLINFO must come last so platform specific code can enforce
- * special alignment requirements on the AUXV if necessary (eg. PPC).
- */
- ARCH_DLINFO;
- #endif
- #undef NEW_AUX_ENT
- sp = loader_build_argptr(envc, argc, sp, p, !ibcs);
- return sp;
- }
- static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex,
- int interpreter_fd,
- abi_ulong *interp_load_addr)
- {
- struct elf_phdr *elf_phdata = NULL;
- struct elf_phdr *eppnt;
- abi_ulong load_addr = 0;
- int load_addr_set = 0;
- int retval;
- abi_ulong last_bss, elf_bss;
- abi_ulong error;
- int i;
- elf_bss = 0;
- last_bss = 0;
- error = 0;
- #ifdef BSWAP_NEEDED
- bswap_ehdr(interp_elf_ex);
- #endif
- /* First of all, some simple consistency checks */
- if ((interp_elf_ex->e_type != ET_EXEC &&
- interp_elf_ex->e_type != ET_DYN) ||
- !elf_check_arch(interp_elf_ex->e_machine)) {
- return ~((abi_ulong)0UL);
- }
- /* Now read in all of the header information */
- if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE)
- return ~(abi_ulong)0UL;
- elf_phdata = (struct elf_phdr *)
- malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
- if (!elf_phdata)
- return ~((abi_ulong)0UL);
- /*
- * If the size of this structure has changed, then punt, since
- * we will be doing the wrong thing.
- */
- if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) {
- free(elf_phdata);
- return ~((abi_ulong)0UL);
- }
- retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET);
- if(retval >= 0) {
- retval = read(interpreter_fd,
- (char *) elf_phdata,
- sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
- }
- if (retval < 0) {
- perror("load_elf_interp");
- exit(-1);
- free (elf_phdata);
- return retval;
- }
- #ifdef BSWAP_NEEDED
- eppnt = elf_phdata;
- for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) {
- bswap_phdr(eppnt);
- }
- #endif
- if (interp_elf_ex->e_type == ET_DYN) {
- /* in order to avoid hardcoding the interpreter load
- address in qemu, we allocate a big enough memory zone */
- error = target_mmap(0, INTERP_MAP_SIZE,
- PROT_NONE, MAP_PRIVATE | MAP_ANON,
- -1, 0);
- if (error == -1) {
- perror("mmap");
- exit(-1);
- }
- load_addr = error;
- load_addr_set = 1;
- }
- eppnt = elf_phdata;
- for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++)
- if (eppnt->p_type == PT_LOAD) {
- int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
- int elf_prot = 0;
- abi_ulong vaddr = 0;
- abi_ulong k;
- if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
- if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
- if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
- if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) {
- elf_type |= MAP_FIXED;
- vaddr = eppnt->p_vaddr;
- }
- error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr),
- eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr),
- elf_prot,
- elf_type,
- interpreter_fd,
- eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr));
- if (error == -1) {
- /* Real error */
- close(interpreter_fd);
- free(elf_phdata);
- return ~((abi_ulong)0UL);
- }
- if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
- load_addr = error;
- load_addr_set = 1;
- }
- /*
- * Find the end of the file mapping for this phdr, and keep
- * track of the largest address we see for this.
- */
- k = load_addr + eppnt->p_vaddr + eppnt->p_filesz;
- if (k > elf_bss) elf_bss = k;
- /*
- * Do the same thing for the memory mapping - between
- * elf_bss and last_bss is the bss section.
- */
- k = load_addr + eppnt->p_memsz + eppnt->p_vaddr;
- if (k > last_bss) last_bss = k;
- }
- /* Now use mmap to map the library into memory. */
- close(interpreter_fd);
- /*
- * Now fill out the bss section. First pad the last page up
- * to the page boundary, and then perform a mmap to make sure
- * that there are zeromapped pages up to and including the last
- * bss page.
- */
- padzero(elf_bss, last_bss);
- elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */
- /* Map the last of the bss segment */
- if (last_bss > elf_bss) {
- target_mmap(elf_bss, last_bss-elf_bss,
- PROT_READ|PROT_WRITE|PROT_EXEC,
- MAP_FIXED|MAP_PRIVATE|MAP_ANON, -1, 0);
- }
- free(elf_phdata);
- *interp_load_addr = load_addr;
- return ((abi_ulong) interp_elf_ex->e_entry) + load_addr;
- }
- static int symfind(const void *s0, const void *s1)
- {
- target_ulong addr = *(target_ulong *)s0;
- struct elf_sym *sym = (struct elf_sym *)s1;
- int result = 0;
- if (addr < sym->st_value) {
- result = -1;
- } else if (addr >= sym->st_value + sym->st_size) {
- result = 1;
- }
- return result;
- }
- static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
- {
- #if ELF_CLASS == ELFCLASS32
- struct elf_sym *syms = s->disas_symtab.elf32;
- #else
- struct elf_sym *syms = s->disas_symtab.elf64;
- #endif
- // binary search
- struct elf_sym *sym;
- sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind);
- if (sym != NULL) {
- return s->disas_strtab + sym->st_name;
- }
- return "";
- }
- /* FIXME: This should use elf_ops.h */
- static int symcmp(const void *s0, const void *s1)
- {
- struct elf_sym *sym0 = (struct elf_sym *)s0;
- struct elf_sym *sym1 = (struct elf_sym *)s1;
- return (sym0->st_value < sym1->st_value)
- ? -1
- : ((sym0->st_value > sym1->st_value) ? 1 : 0);
- }
- /* Best attempt to load symbols from this ELF object. */
- static void load_symbols(struct elfhdr *hdr, int fd)
- {
- unsigned int i, nsyms;
- struct elf_shdr sechdr, symtab, strtab;
- char *strings;
- struct syminfo *s;
- struct elf_sym *syms, *new_syms;
- lseek(fd, hdr->e_shoff, SEEK_SET);
- for (i = 0; i < hdr->e_shnum; i++) {
- if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr))
- return;
- #ifdef BSWAP_NEEDED
- bswap_shdr(&sechdr);
- #endif
- if (sechdr.sh_type == SHT_SYMTAB) {
- symtab = sechdr;
- lseek(fd, hdr->e_shoff
- + sizeof(sechdr) * sechdr.sh_link, SEEK_SET);
- if (read(fd, &strtab, sizeof(strtab))
- != sizeof(strtab))
- return;
- #ifdef BSWAP_NEEDED
- bswap_shdr(&strtab);
- #endif
- goto found;
- }
- }
- return; /* Shouldn't happen... */
- found:
- /* Now know where the strtab and symtab are. Snarf them. */
- s = malloc(sizeof(*s));
- syms = malloc(symtab.sh_size);
- if (!syms) {
- free(s);
- return;
- }
- s->disas_strtab = strings = malloc(strtab.sh_size);
- if (!s->disas_strtab) {
- free(s);
- free(syms);
- return;
- }
- lseek(fd, symtab.sh_offset, SEEK_SET);
- if (read(fd, syms, symtab.sh_size) != symtab.sh_size) {
- free(s);
- free(syms);
- free(strings);
- return;
- }
- nsyms = symtab.sh_size / sizeof(struct elf_sym);
- i = 0;
- while (i < nsyms) {
- #ifdef BSWAP_NEEDED
- bswap_sym(syms + i);
- #endif
- // Throw away entries which we do not need.
- if (syms[i].st_shndx == SHN_UNDEF ||
- syms[i].st_shndx >= SHN_LORESERVE ||
- ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
- nsyms--;
- if (i < nsyms) {
- syms[i] = syms[nsyms];
- }
- continue;
- }
- #if defined(TARGET_ARM) || defined (TARGET_MIPS)
- /* The bottom address bit marks a Thumb or MIPS16 symbol. */
- syms[i].st_value &= ~(target_ulong)1;
- #endif
- i++;
- }
- /* Attempt to free the storage associated with the local symbols
- that we threw away. Whether or not this has any effect on the
- memory allocation depends on the malloc implementation and how
- many symbols we managed to discard. */
- new_syms = realloc(syms, nsyms * sizeof(*syms));
- if (new_syms == NULL) {
- free(s);
- free(syms);
- free(strings);
- return;
- }
- syms = new_syms;
- qsort(syms, nsyms, sizeof(*syms), symcmp);
- lseek(fd, strtab.sh_offset, SEEK_SET);
- if (read(fd, strings, strtab.sh_size) != strtab.sh_size) {
- free(s);
- free(syms);
- free(strings);
- return;
- }
- s->disas_num_syms = nsyms;
- #if ELF_CLASS == ELFCLASS32
- s->disas_symtab.elf32 = syms;
- s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx;
- #else
- s->disas_symtab.elf64 = syms;
- s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx;
- #endif
- s->next = syminfos;
- syminfos = s;
- }
- int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
- struct image_info * info)
- {
- struct elfhdr elf_ex;
- struct elfhdr interp_elf_ex;
- struct exec interp_ex;
- int interpreter_fd = -1; /* avoid warning */
- abi_ulong load_addr, load_bias;
- int load_addr_set = 0;
- unsigned int interpreter_type = INTERPRETER_NONE;
- unsigned char ibcs2_interpreter;
- int i;
- abi_ulong mapped_addr;
- struct elf_phdr * elf_ppnt;
- struct elf_phdr *elf_phdata;
- abi_ulong elf_bss, k, elf_brk;
- int retval;
- char * elf_interpreter;
- abi_ulong elf_entry, interp_load_addr = 0;
- int status;
- abi_ulong start_code, end_code, start_data, end_data;
- abi_ulong reloc_func_desc = 0;
- abi_ulong elf_stack;
- char passed_fileno[6];
- ibcs2_interpreter = 0;
- status = 0;
- load_addr = 0;
- load_bias = 0;
- elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */
- #ifdef BSWAP_NEEDED
- bswap_ehdr(&elf_ex);
- #endif
- /* First of all, some simple consistency checks */
- if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
- (! elf_check_arch(elf_ex.e_machine))) {
- return -ENOEXEC;
- }
- bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
- bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p);
- bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p);
- if (!bprm->p) {
- retval = -E2BIG;
- }
- /* Now read in all of the header information */
- elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum);
- if (elf_phdata == NULL) {
- return -ENOMEM;
- }
- retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET);
- if(retval > 0) {
- retval = read(bprm->fd, (char *) elf_phdata,
- elf_ex.e_phentsize * elf_ex.e_phnum);
- }
- if (retval < 0) {
- perror("load_elf_binary");
- exit(-1);
- free (elf_phdata);
- return -errno;
- }
- #ifdef BSWAP_NEEDED
- elf_ppnt = elf_phdata;
- for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) {
- bswap_phdr(elf_ppnt);
- }
- #endif
- elf_ppnt = elf_phdata;
- elf_bss = 0;
- elf_brk = 0;
- elf_stack = ~((abi_ulong)0UL);
- elf_interpreter = NULL;
- start_code = ~((abi_ulong)0UL);
- end_code = 0;
- start_data = 0;
- end_data = 0;
- interp_ex.a_info = 0;
- for(i=0;i < elf_ex.e_phnum; i++) {
- if (elf_ppnt->p_type == PT_INTERP) {
- if ( elf_interpreter != NULL )
- {
- free (elf_phdata);
- free(elf_interpreter);
- close(bprm->fd);
- return -EINVAL;
- }
- /* This is the program interpreter used for
- * shared libraries - for now assume that this
- * is an a.out format binary
- */
- elf_interpreter = (char *)malloc(elf_ppnt->p_filesz);
- if (elf_interpreter == NULL) {
- free (elf_phdata);
- close(bprm->fd);
- return -ENOMEM;
- }
- retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET);
- if(retval >= 0) {
- retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz);
- }
- if(retval < 0) {
- perror("load_elf_binary2");
- exit(-1);
- }
- /* If the program interpreter is one of these two,
- then assume an iBCS2 image. Otherwise assume
- a native linux image. */
- /* JRP - Need to add X86 lib dir stuff here... */
- if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 ||
- strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) {
- ibcs2_interpreter = 1;
- }
- #if 0
- printf("Using ELF interpreter %s\n", path(elf_interpreter));
- #endif
- if (retval >= 0) {
- retval = open(path(elf_interpreter), O_RDONLY);
- if(retval >= 0) {
- interpreter_fd = retval;
- }
- else {
- perror(elf_interpreter);
- exit(-1);
- /* retval = -errno; */
- }
- }
- if (retval >= 0) {
- retval = lseek(interpreter_fd, 0, SEEK_SET);
- if(retval >= 0) {
- retval = read(interpreter_fd,bprm->buf,128);
- }
- }
- if (retval >= 0) {
- interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */
- interp_elf_ex = *((struct elfhdr *) bprm->buf); /* elf exec-header */
- }
- if (retval < 0) {
- perror("load_elf_binary3");
- exit(-1);
- free (elf_phdata);
- free(elf_interpreter);
- close(bprm->fd);
- return retval;
- }
- }
- elf_ppnt++;
- }
- /* Some simple consistency checks for the interpreter */
- if (elf_interpreter){
- interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT;
- /* Now figure out which format our binary is */
- if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) &&
- (N_MAGIC(interp_ex) != QMAGIC)) {
- interpreter_type = INTERPRETER_ELF;
- }
- if (interp_elf_ex.e_ident[0] != 0x7f ||
- strncmp((char *)&interp_elf_ex.e_ident[1], "ELF",3) != 0) {
- interpreter_type &= ~INTERPRETER_ELF;
- }
- if (!interpreter_type) {
- free(elf_interpreter);
- free(elf_phdata);
- close(bprm->fd);
- return -ELIBBAD;
- }
- }
- /* OK, we are done with that, now set up the arg stuff,
- and then start this sucker up */
- {
- char * passed_p;
- if (interpreter_type == INTERPRETER_AOUT) {
- snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd);
- passed_p = passed_fileno;
- if (elf_interpreter) {
- bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p);
- bprm->argc++;
- }
- }
- if (!bprm->p) {
- if (elf_interpreter) {
- free(elf_interpreter);
- }
- free (elf_phdata);
- close(bprm->fd);
- return -E2BIG;
- }
- }
- /* OK, This is the point of no return */
- info->end_data = 0;
- info->end_code = 0;
- info->start_mmap = (abi_ulong)ELF_START_MMAP;
- info->mmap = 0;
- elf_entry = (abi_ulong) elf_ex.e_entry;
- #if defined(CONFIG_USE_GUEST_BASE)
- /*
- * In case where user has not explicitly set the guest_base, we
- * probe here that should we set it automatically.
- */
- if (!have_guest_base) {
- /*
- * Go through ELF program header table and find out whether
- * any of the segments drop below our current mmap_min_addr and
- * in that case set guest_base to corresponding address.
- */
- for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum;
- i++, elf_ppnt++) {
- if (elf_ppnt->p_type != PT_LOAD)
- continue;
- if (HOST_PAGE_ALIGN(elf_ppnt->p_vaddr) < mmap_min_addr) {
- guest_base = HOST_PAGE_ALIGN(mmap_min_addr);
- break;
- }
- }
- }
- #endif /* CONFIG_USE_GUEST_BASE */
- /* Do this so that we can load the interpreter, if need be. We will
- change some of these later */
- info->rss = 0;
- bprm->p = setup_arg_pages(bprm->p, bprm, info);
- info->start_stack = bprm->p;
- /* Now we do a little grungy work by mmaping the ELF image into
- * the correct location in memory. At this point, we assume that
- * the image should be loaded at fixed address, not at a variable
- * address.
- */
- for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) {
- int elf_prot = 0;
- int elf_flags = 0;
- abi_ulong error;
- if (elf_ppnt->p_type != PT_LOAD)
- continue;
- if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
- if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
- if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
- elf_flags = MAP_PRIVATE | MAP_DENYWRITE;
- if (elf_ex.e_type == ET_EXEC || load_addr_set) {
- elf_flags |= MAP_FIXED;
- } else if (elf_ex.e_type == ET_DYN) {
- /* Try and get dynamic programs out of the way of the default mmap
- base, as well as whatever program they might try to exec. This
- is because the brk will follow the loader, and is not movable. */
- /* NOTE: for qemu, we do a big mmap to get enough space
- without hardcoding any address */
- error = target_mmap(0, ET_DYN_MAP_SIZE,
- PROT_NONE, MAP_PRIVATE | MAP_ANON,
- -1, 0);
- if (error == -1) {
- perror("mmap");
- exit(-1);
- }
- load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr);
- }
- error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr),
- (elf_ppnt->p_filesz +
- TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)),
- elf_prot,
- (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE),
- bprm->fd,
- (elf_ppnt->p_offset -
- TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)));
- if (error == -1) {
- perror("mmap");
- exit(-1);
- }
- #ifdef LOW_ELF_STACK
- if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
- elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr);
- #endif
- if (!load_addr_set) {
- load_addr_set = 1;
- load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset;
- if (elf_ex.e_type == ET_DYN) {
- load_bias += error -
- TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr);
- load_addr += load_bias;
- reloc_func_desc = load_bias;
- }
- }
- k = elf_ppnt->p_vaddr;
- if (k < start_code)
- start_code = k;
- if (start_data < k)
- start_data = k;
- k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz;
- if (k > elf_bss)
- elf_bss = k;
- if ((elf_ppnt->p_flags & PF_X) && end_code < k)
- end_code = k;
- if (end_data < k)
- end_data = k;
- k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz;
- if (k > elf_brk) elf_brk = k;
- }
- elf_entry += load_bias;
- elf_bss += load_bias;
- elf_brk += load_bias;
- start_code += load_bias;
- end_code += load_bias;
- start_data += load_bias;
- end_data += load_bias;
- if (elf_interpreter) {
- if (interpreter_type & 1) {
- elf_entry = load_aout_interp(&interp_ex, interpreter_fd);
- }
- else if (interpreter_type & 2) {
- elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd,
- &interp_load_addr);
- }
- reloc_func_desc = interp_load_addr;
- close(interpreter_fd);
- free(elf_interpreter);
- if (elf_entry == ~((abi_ulong)0UL)) {
- printf("Unable to load interpreter\n");
- free(elf_phdata);
- exit(-1);
- return 0;
- }
- }
- free(elf_phdata);
- if (qemu_log_enabled())
- load_symbols(&elf_ex, bprm->fd);
- if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd);
- info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX);
- #ifdef LOW_ELF_STACK
- info->start_stack = bprm->p = elf_stack - 4;
- #endif
- bprm->p = create_elf_tables(bprm->p,
- bprm->argc,
- bprm->envc,
- &elf_ex,
- load_addr, load_bias,
- interp_load_addr,
- (interpreter_type == INTERPRETER_AOUT ? 0 : 1),
- info);
- info->load_addr = reloc_func_desc;
- info->start_brk = info->brk = elf_brk;
- info->end_code = end_code;
- info->start_code = start_code;
- info->start_data = start_data;
- info->end_data = end_data;
- info->start_stack = bprm->p;
- /* Calling set_brk effectively mmaps the pages that we need for the bss and break
- sections */
- set_brk(elf_bss, elf_brk);
- padzero(elf_bss, elf_brk);
- #if 0
- printf("(start_brk) %x\n" , info->start_brk);
- printf("(end_code) %x\n" , info->end_code);
- printf("(start_code) %x\n" , info->start_code);
- printf("(end_data) %x\n" , info->end_data);
- printf("(start_stack) %x\n" , info->start_stack);
- printf("(brk) %x\n" , info->brk);
- #endif
- if ( info->personality == PER_SVR4 )
- {
- /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
- and some applications "depend" upon this behavior.
- Since we do not have the power to recompile these, we
- emulate the SVr4 behavior. Sigh. */
- mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
- MAP_FIXED | MAP_PRIVATE, -1, 0);
- }
- info->entry = elf_entry;
- return 0;
- }
- static int load_aout_interp(void * exptr, int interp_fd)
- {
- printf("a.out interpreter not yet supported\n");
- return(0);
- }
- void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- init_thread(regs, infop);
- }
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