typedef target_ulong target_elf_greg_t;
#ifdef USE_UID16
-typedef uint16_t target_uid_t;
-typedef uint16_t target_gid_t;
+typedef target_ushort target_uid_t;
+typedef target_ushort target_gid_t;
#else
-typedef uint32_t target_uid_t;
-typedef uint32_t target_gid_t;
+typedef target_uint target_uid_t;
+typedef target_uint target_gid_t;
#endif
-typedef int32_t target_pid_t;
+typedef target_int target_pid_t;
#ifdef TARGET_I386
#endif
+#ifdef TARGET_UNICORE32
+
+#define ELF_START_MMAP 0x80000000
+
+#define elf_check_arch(x) ((x) == EM_UNICORE32)
+
+#define ELF_CLASS ELFCLASS32
+#define ELF_DATA ELFDATA2LSB
+#define ELF_ARCH EM_UNICORE32
+
+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->UC32_REG_asr = 0x10;
+ regs->UC32_REG_pc = infop->entry & 0xfffffffe;
+ regs->UC32_REG_sp = infop->start_stack;
+ /* FIXME - what to for failure of get_user()? */
+ get_user_ual(regs->UC32_REG_02, stack + 8); /* envp */
+ get_user_ual(regs->UC32_REG_01, stack + 4); /* envp */
+ /* XXX: it seems that r0 is zeroed after ! */
+ regs->UC32_REG_00 = 0;
+}
+
+#define ELF_NREG 34
+typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
+
+static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
+{
+ (*regs)[0] = env->regs[0];
+ (*regs)[1] = env->regs[1];
+ (*regs)[2] = env->regs[2];
+ (*regs)[3] = env->regs[3];
+ (*regs)[4] = env->regs[4];
+ (*regs)[5] = env->regs[5];
+ (*regs)[6] = env->regs[6];
+ (*regs)[7] = env->regs[7];
+ (*regs)[8] = env->regs[8];
+ (*regs)[9] = env->regs[9];
+ (*regs)[10] = env->regs[10];
+ (*regs)[11] = env->regs[11];
+ (*regs)[12] = env->regs[12];
+ (*regs)[13] = env->regs[13];
+ (*regs)[14] = env->regs[14];
+ (*regs)[15] = env->regs[15];
+ (*regs)[16] = env->regs[16];
+ (*regs)[17] = env->regs[17];
+ (*regs)[18] = env->regs[18];
+ (*regs)[19] = env->regs[19];
+ (*regs)[20] = env->regs[20];
+ (*regs)[21] = env->regs[21];
+ (*regs)[22] = env->regs[22];
+ (*regs)[23] = env->regs[23];
+ (*regs)[24] = env->regs[24];
+ (*regs)[25] = env->regs[25];
+ (*regs)[26] = env->regs[26];
+ (*regs)[27] = env->regs[27];
+ (*regs)[28] = env->regs[28];
+ (*regs)[29] = env->regs[29];
+ (*regs)[30] = env->regs[30];
+ (*regs)[31] = env->regs[31];
+
+ (*regs)[32] = cpu_asr_read((CPUState *)env);
+ (*regs)[33] = env->regs[0]; /* XXX */
+}
+
+#define USE_ELF_CORE_DUMP
+#define ELF_EXEC_PAGESIZE 4096
+
+#define ELF_HWCAP (UC32_HWCAP_CMOV | UC32_HWCAP_UCF64)
+
+#endif
+
#ifdef TARGET_SPARC
#ifdef TARGET_SPARC64
#define ELF_START_MMAP 0x80000000
-
+#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
+ | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
#ifndef TARGET_ABI32
#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
#else
#else
#define ELF_START_MMAP 0x80000000
-
+#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
+ | HWCAP_SPARC_MULDIV)
#define elf_check_arch(x) ( (x) == EM_SPARC )
#define ELF_CLASS ELFCLASS32
#endif /* TARGET_ALPHA */
+#ifdef TARGET_S390X
+
+#define ELF_START_MMAP (0x20000000000ULL)
+
+#define elf_check_arch(x) ( (x) == ELF_ARCH )
+
+#define ELF_CLASS ELFCLASS64
+#define ELF_DATA ELFDATA2MSB
+#define ELF_ARCH EM_S390
+
+static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
+{
+ regs->psw.addr = infop->entry;
+ regs->psw.mask = PSW_MASK_64 | PSW_MASK_32;
+ regs->gprs[15] = infop->start_stack;
+}
+
+#endif /* TARGET_S390X */
+
#ifndef ELF_PLATFORM
#define ELF_PLATFORM (NULL)
#endif
#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
+#define DLINFO_ITEMS 13
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)
{
#ifdef USE_ELF_CORE_DUMP
static int elf_core_dump(int, const CPUState *);
#endif /* USE_ELF_CORE_DUMP */
+static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
+
+/* Verify the portions of EHDR within E_IDENT for the target.
+ This can be performed before bswapping the entire header. */
+static bool elf_check_ident(struct elfhdr *ehdr)
+{
+ return (ehdr->e_ident[EI_MAG0] == ELFMAG0
+ && ehdr->e_ident[EI_MAG1] == ELFMAG1
+ && ehdr->e_ident[EI_MAG2] == ELFMAG2
+ && ehdr->e_ident[EI_MAG3] == ELFMAG3
+ && ehdr->e_ident[EI_CLASS] == ELF_CLASS
+ && ehdr->e_ident[EI_DATA] == ELF_DATA
+ && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
+}
+
+/* Verify the portions of EHDR outside of E_IDENT for the target.
+ This has to wait until after bswapping the header. */
+static bool elf_check_ehdr(struct elfhdr *ehdr)
+{
+ return (elf_check_arch(ehdr->e_machine)
+ && ehdr->e_ehsize == sizeof(struct elfhdr)
+ && ehdr->e_phentsize == sizeof(struct elf_phdr)
+ && ehdr->e_shentsize == sizeof(struct elf_shdr)
+ && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
+}
/*
* 'copy_elf_strings()' copies argument/envelope strings from user
static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm,
struct image_info *info)
{
- abi_ulong stack_base, size, error;
+ abi_ulong stack_base, size, error, guard;
int i;
/* Create enough stack to hold everything. If we don't use
- * it for args, we'll use it for something else...
- */
+ it for args, we'll use it for something else. */
size = guest_stack_size;
- if (size < MAX_ARG_PAGES*TARGET_PAGE_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_ANONYMOUS,
- -1, 0);
+ }
+ guard = TARGET_PAGE_SIZE;
+ if (guard < qemu_real_host_page_size) {
+ guard = qemu_real_host_page_size;
+ }
+
+ error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (error == -1) {
- perror("stk mmap");
+ perror("mmap stack");
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);
- info->stack_limit = error;
- stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
+ /* We reserve one extra page at the top of the stack as guard. */
+ target_mprotect(error, guard, PROT_NONE);
+
+ info->stack_limit = error + guard;
+ stack_base = info->stack_limit + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
p += stack_base;
for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
}
}
+#ifdef CONFIG_USE_FDPIC
+static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp)
+{
+ uint16_t n;
+ struct elf32_fdpic_loadseg *loadsegs = info->loadsegs;
+
+ /* elf32_fdpic_loadseg */
+ n = info->nsegs;
+ while (n--) {
+ sp -= 12;
+ put_user_u32(loadsegs[n].addr, sp+0);
+ put_user_u32(loadsegs[n].p_vaddr, sp+4);
+ put_user_u32(loadsegs[n].p_memsz, sp+8);
+ }
+
+ /* elf32_fdpic_loadmap */
+ sp -= 4;
+ put_user_u16(0, sp+0); /* version */
+ put_user_u16(info->nsegs, sp+2); /* nsegs */
+
+ info->personality = PER_LINUX_FDPIC;
+ info->loadmap_addr = sp;
+
+ return sp;
+}
+#endif
+
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)
+ struct elfhdr *exec,
+ struct image_info *info,
+ struct image_info *interp_info)
{
abi_ulong sp;
int size;
+ int i;
+ abi_ulong u_rand_bytes;
+ uint8_t k_rand_bytes[16];
abi_ulong u_platform;
const char *k_platform;
const int n = sizeof(elf_addr_t);
sp = p;
+
+#ifdef CONFIG_USE_FDPIC
+ /* Needs to be before we load the env/argc/... */
+ if (elf_is_fdpic(exec)) {
+ /* Need 4 byte alignment for these structs */
+ sp &= ~3;
+ sp = loader_build_fdpic_loadmap(info, sp);
+ info->other_info = interp_info;
+ if (interp_info) {
+ interp_info->other_info = info;
+ sp = loader_build_fdpic_loadmap(interp_info, sp);
+ }
+ }
+#endif
+
u_platform = 0;
k_platform = ELF_PLATFORM;
if (k_platform) {
/* FIXME - check return value of memcpy_to_target() for failure */
memcpy_to_target(sp, k_platform, len);
}
+
+ /*
+ * Generate 16 random bytes for userspace PRNG seeding (not
+ * cryptically secure but it's not the aim of QEMU).
+ */
+ srand((unsigned int) time(NULL));
+ for (i = 0; i < 16; i++) {
+ k_rand_bytes[i] = rand();
+ }
+ sp -= 16;
+ u_rand_bytes = sp;
+ /* FIXME - check return value of memcpy_to_target() for failure */
+ memcpy_to_target(sp, k_rand_bytes, 16);
+
/*
* Force 16 byte _final_ alignment here for generality.
*/
size += DLINFO_ARCH_ITEMS * 2;
#endif
size += envc + argc + 2;
- size += (!ibcs ? 3 : 1); /* argc itself */
+ size += 1; /* argc itself */
size *= n;
if (size & 15)
sp -= 16 - (size & 15);
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_PHDR, (abi_ulong)(info->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_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
- NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry);
+ NEW_AUX_ENT(AT_ENTRY, info->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));
+ NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
+
if (k_platform)
NEW_AUX_ENT(AT_PLATFORM, u_platform);
#ifdef ARCH_DLINFO
info->saved_auxv = sp;
- sp = loader_build_argptr(envc, argc, sp, p, !ibcs);
+ sp = loader_build_argptr(envc, argc, sp, p, 0);
return sp;
}
-
-static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex,
- int interpreter_fd,
- abi_ulong *interp_load_addr,
- char bprm_buf[BPRM_BUF_SIZE])
+static void probe_guest_base(const char *image_name,
+ abi_ulong loaddr, abi_ulong hiaddr)
{
- struct elf_phdr *elf_phdata = NULL;
- struct elf_phdr *eppnt;
- abi_ulong load_addr = 0;
- int load_addr_set = 0;
- int retval;
- abi_ulong error;
- int i;
+ /* Probe for a suitable guest base address, if the user has not set
+ * it explicitly, and set guest_base appropriately.
+ * In case of error we will print a suitable message and exit.
+ */
+#if defined(CONFIG_USE_GUEST_BASE)
+ const char *errmsg;
+ if (!have_guest_base && !reserved_va) {
+ unsigned long host_start, real_start, host_size;
- error = 0;
+ /* Round addresses to page boundaries. */
+ loaddr &= qemu_host_page_mask;
+ hiaddr = HOST_PAGE_ALIGN(hiaddr);
- bswap_ehdr(interp_elf_ex);
- /* 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);
+ if (loaddr < mmap_min_addr) {
+ host_start = HOST_PAGE_ALIGN(mmap_min_addr);
+ } else {
+ host_start = loaddr;
+ if (host_start != loaddr) {
+ errmsg = "Address overflow loading ELF binary";
+ goto exit_errmsg;
+ }
+ }
+ host_size = hiaddr - loaddr;
+ while (1) {
+ /* Do not use mmap_find_vma here because that is limited to the
+ guest address space. We are going to make the
+ guest address space fit whatever we're given. */
+ real_start = (unsigned long)
+ mmap((void *)host_start, host_size, PROT_NONE,
+ MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE, -1, 0);
+ if (real_start == (unsigned long)-1) {
+ goto exit_perror;
+ }
+ if (real_start == host_start) {
+ break;
+ }
+ /* That address didn't work. Unmap and try a different one.
+ The address the host picked because is typically right at
+ the top of the host address space and leaves the guest with
+ no usable address space. Resort to a linear search. We
+ already compensated for mmap_min_addr, so this should not
+ happen often. Probably means we got unlucky and host
+ address space randomization put a shared library somewhere
+ inconvenient. */
+ munmap((void *)real_start, host_size);
+ host_start += qemu_host_page_size;
+ if (host_start == loaddr) {
+ /* Theoretically possible if host doesn't have any suitably
+ aligned areas. Normally the first mmap will fail. */
+ errmsg = "Unable to find space for application";
+ goto exit_errmsg;
+ }
+ }
+ qemu_log("Relocating guest address space from 0x"
+ TARGET_ABI_FMT_lx " to 0x%lx\n",
+ loaddr, real_start);
+ guest_base = real_start - loaddr;
}
+ return;
+exit_perror:
+ errmsg = strerror(errno);
+exit_errmsg:
+ fprintf(stderr, "%s: %s\n", image_name, errmsg);
+ exit(-1);
+#endif
+}
- /* 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;
+/* Load an ELF image into the address space.
- elf_phdata = (struct elf_phdr *)
- malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
+ IMAGE_NAME is the filename of the image, to use in error messages.
+ IMAGE_FD is the open file descriptor for the image.
- if (!elf_phdata)
- return ~((abi_ulong)0UL);
+ BPRM_BUF is a copy of the beginning of the file; this of course
+ contains the elf file header at offset 0. It is assumed that this
+ buffer is sufficiently aligned to present no problems to the host
+ in accessing data at aligned offsets within the buffer.
- /*
- * 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);
+ On return: INFO values will be filled in, as necessary or available. */
+
+static void load_elf_image(const char *image_name, int image_fd,
+ struct image_info *info, char **pinterp_name,
+ char bprm_buf[BPRM_BUF_SIZE])
+{
+ struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
+ struct elf_phdr *phdr;
+ abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
+ int i, retval;
+ const char *errmsg;
+
+ /* First of all, some simple consistency checks */
+ errmsg = "Invalid ELF image for this architecture";
+ if (!elf_check_ident(ehdr)) {
+ goto exit_errmsg;
+ }
+ bswap_ehdr(ehdr);
+ if (!elf_check_ehdr(ehdr)) {
+ goto exit_errmsg;
}
- i = interp_elf_ex->e_phnum * sizeof(struct elf_phdr);
- if (interp_elf_ex->e_phoff + i <= BPRM_BUF_SIZE) {
- memcpy(elf_phdata, bprm_buf + interp_elf_ex->e_phoff, i);
+ i = ehdr->e_phnum * sizeof(struct elf_phdr);
+ if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
+ phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
} else {
- retval = pread(interpreter_fd, elf_phdata, i, interp_elf_ex->e_phoff);
+ phdr = (struct elf_phdr *) alloca(i);
+ retval = pread(image_fd, phdr, i, ehdr->e_phoff);
if (retval != i) {
- perror("load_elf_interp");
- exit(-1);
+ goto exit_read;
}
}
- bswap_phdr(elf_phdata, interp_elf_ex->e_phnum);
-
- 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);
+ bswap_phdr(phdr, ehdr->e_phnum);
+
+#ifdef CONFIG_USE_FDPIC
+ info->nsegs = 0;
+ info->pt_dynamic_addr = 0;
+#endif
+
+ /* Find the maximum size of the image and allocate an appropriate
+ amount of memory to handle that. */
+ loaddr = -1, hiaddr = 0;
+ for (i = 0; i < ehdr->e_phnum; ++i) {
+ if (phdr[i].p_type == PT_LOAD) {
+ abi_ulong a = phdr[i].p_vaddr;
+ if (a < loaddr) {
+ loaddr = a;
+ }
+ a += phdr[i].p_memsz;
+ if (a > hiaddr) {
+ hiaddr = a;
+ }
+#ifdef CONFIG_USE_FDPIC
+ ++info->nsegs;
+#endif
+ }
+ }
+
+ load_addr = loaddr;
+ if (ehdr->e_type == ET_DYN) {
+ /* The image indicates that it can be loaded anywhere. Find a
+ location that can hold the memory space required. If the
+ image is pre-linked, LOADDR will be non-zero. Since we do
+ not supply MAP_FIXED here we'll use that address if and
+ only if it remains available. */
+ load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
+ MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
+ -1, 0);
+ if (load_addr == -1) {
+ goto exit_perror;
+ }
+ } else if (pinterp_name != NULL) {
+ /* This is the main executable. Make sure that the low
+ address does not conflict with MMAP_MIN_ADDR or the
+ QEMU application itself. */
+ probe_guest_base(image_name, loaddr, hiaddr);
+ }
+ load_bias = load_addr - loaddr;
+
+#ifdef CONFIG_USE_FDPIC
+ {
+ struct elf32_fdpic_loadseg *loadsegs = info->loadsegs =
+ qemu_malloc(sizeof(*loadsegs) * info->nsegs);
+
+ for (i = 0; i < ehdr->e_phnum; ++i) {
+ switch (phdr[i].p_type) {
+ case PT_DYNAMIC:
+ info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias;
+ break;
+ case PT_LOAD:
+ loadsegs->addr = phdr[i].p_vaddr + load_bias;
+ loadsegs->p_vaddr = phdr[i].p_vaddr;
+ loadsegs->p_memsz = phdr[i].p_memsz;
+ ++loadsegs;
+ break;
+ }
}
- load_addr = error;
- load_addr_set = 1;
}
+#endif
- eppnt = elf_phdata;
- for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++)
+ info->load_bias = load_bias;
+ info->load_addr = load_addr;
+ info->entry = ehdr->e_entry + load_bias;
+ info->start_code = -1;
+ info->end_code = 0;
+ info->start_data = -1;
+ info->end_data = 0;
+ info->brk = 0;
+
+ for (i = 0; i < ehdr->e_phnum; i++) {
+ struct elf_phdr *eppnt = phdr + i;
if (eppnt->p_type == PT_LOAD) {
- int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
+ abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em;
int elf_prot = 0;
- abi_ulong vaddr = 0;
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));
+ vaddr = load_bias + eppnt->p_vaddr;
+ vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
+ vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
+
+ error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po,
+ elf_prot, MAP_PRIVATE | MAP_FIXED,
+ image_fd, eppnt->p_offset - vaddr_po);
if (error == -1) {
- /* Real error */
- close(interpreter_fd);
- free(elf_phdata);
- return ~((abi_ulong)0UL);
+ goto exit_perror;
}
- if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
- load_addr = error;
- load_addr_set = 1;
- }
+ vaddr_ef = vaddr + eppnt->p_filesz;
+ vaddr_em = vaddr + eppnt->p_memsz;
/* If the load segment requests extra zeros (e.g. bss), map it. */
- if (eppnt->p_filesz < eppnt->p_memsz) {
- abi_ulong base = load_addr + eppnt->p_vaddr;
- zero_bss(base + eppnt->p_filesz,
- base + eppnt->p_memsz, elf_prot);
+ if (vaddr_ef < vaddr_em) {
+ zero_bss(vaddr_ef, vaddr_em, elf_prot);
+ }
+
+ /* Find the full program boundaries. */
+ if (elf_prot & PROT_EXEC) {
+ if (vaddr < info->start_code) {
+ info->start_code = vaddr;
+ }
+ if (vaddr_ef > info->end_code) {
+ info->end_code = vaddr_ef;
+ }
+ }
+ if (elf_prot & PROT_WRITE) {
+ if (vaddr < info->start_data) {
+ info->start_data = vaddr;
+ }
+ if (vaddr_ef > info->end_data) {
+ info->end_data = vaddr_ef;
+ }
+ if (vaddr_em > info->brk) {
+ info->brk = vaddr_em;
+ }
+ }
+ } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
+ char *interp_name;
+
+ if (*pinterp_name) {
+ errmsg = "Multiple PT_INTERP entries";
+ goto exit_errmsg;
}
+ interp_name = malloc(eppnt->p_filesz);
+ if (!interp_name) {
+ goto exit_perror;
+ }
+
+ if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
+ memcpy(interp_name, bprm_buf + eppnt->p_offset,
+ eppnt->p_filesz);
+ } else {
+ retval = pread(image_fd, interp_name, eppnt->p_filesz,
+ eppnt->p_offset);
+ if (retval != eppnt->p_filesz) {
+ goto exit_perror;
+ }
+ }
+ if (interp_name[eppnt->p_filesz - 1] != 0) {
+ errmsg = "Invalid PT_INTERP entry";
+ goto exit_errmsg;
+ }
+ *pinterp_name = interp_name;
}
+ }
- /* Now use mmap to map the library into memory. */
+ if (info->end_data == 0) {
+ info->start_data = info->end_code;
+ info->end_data = info->end_code;
+ info->brk = info->end_code;
+ }
+
+ if (qemu_log_enabled()) {
+ load_symbols(ehdr, image_fd, load_bias);
+ }
- close(interpreter_fd);
- free(elf_phdata);
+ close(image_fd);
+ return;
- *interp_load_addr = load_addr;
- return ((abi_ulong) interp_elf_ex->e_entry) + load_addr;
+ exit_read:
+ if (retval >= 0) {
+ errmsg = "Incomplete read of file header";
+ goto exit_errmsg;
+ }
+ exit_perror:
+ errmsg = strerror(errno);
+ exit_errmsg:
+ fprintf(stderr, "%s: %s\n", image_name, errmsg);
+ exit(-1);
+}
+
+static void load_elf_interp(const char *filename, struct image_info *info,
+ char bprm_buf[BPRM_BUF_SIZE])
+{
+ int fd, retval;
+
+ fd = open(path(filename), O_RDONLY);
+ if (fd < 0) {
+ goto exit_perror;
+ }
+
+ retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
+ if (retval < 0) {
+ goto exit_perror;
+ }
+ if (retval < BPRM_BUF_SIZE) {
+ memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
+ }
+
+ load_elf_image(filename, fd, info, NULL, bprm_buf);
+ return;
+
+ exit_perror:
+ fprintf(stderr, "%s: %s\n", filename, strerror(errno));
+ exit(-1);
}
static int symfind(const void *s0, const void *s1)
}
/* 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;
-
- lseek(fd, hdr->e_shoff, SEEK_SET);
- for (i = 0; i < hdr->e_shnum; i++) {
- if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr))
- return;
- bswap_shdr(&sechdr, 1);
- 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;
- bswap_shdr(&strtab, 1);
+static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
+{
+ int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
+ struct elf_shdr *shdr;
+ char *strings = NULL;
+ struct syminfo *s = NULL;
+ struct elf_sym *new_syms, *syms = NULL;
+
+ shnum = hdr->e_shnum;
+ i = shnum * sizeof(struct elf_shdr);
+ shdr = (struct elf_shdr *)alloca(i);
+ if (pread(fd, shdr, i, hdr->e_shoff) != i) {
+ return;
+ }
+
+ bswap_shdr(shdr, shnum);
+ for (i = 0; i < shnum; ++i) {
+ if (shdr[i].sh_type == SHT_SYMTAB) {
+ sym_idx = i;
+ str_idx = shdr[i].sh_link;
goto found;
}
}
- return; /* Shouldn't happen... */
+
+ /* There will be no symbol table if the file was stripped. */
+ return;
found:
- /* Now know where the strtab and symtab are. Snarf them. */
+ /* Now know where the strtab and symtab are. Snarf them. */
s = malloc(sizeof(*s));
- syms = malloc(symtab.sh_size);
- if (!syms)
- return;
- s->disas_strtab = strings = malloc(strtab.sh_size);
- if (!s->disas_strtab)
- return;
+ if (!s) {
+ goto give_up;
+ }
- lseek(fd, symtab.sh_offset, SEEK_SET);
- if (read(fd, syms, symtab.sh_size) != symtab.sh_size)
- return;
+ i = shdr[str_idx].sh_size;
+ s->disas_strtab = strings = malloc(i);
+ if (!strings || pread(fd, strings, i, shdr[str_idx].sh_offset) != i) {
+ goto give_up;
+ }
- nsyms = symtab.sh_size / sizeof(struct elf_sym);
+ i = shdr[sym_idx].sh_size;
+ syms = malloc(i);
+ if (!syms || pread(fd, syms, i, shdr[sym_idx].sh_offset) != i) {
+ goto give_up;
+ }
- i = 0;
- while (i < nsyms) {
+ nsyms = i / sizeof(struct elf_sym);
+ for (i = 0; i < nsyms; ) {
bswap_sym(syms + i);
- // 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) {
+ /* 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) {
+ if (i < --nsyms) {
syms[i] = syms[nsyms];
}
- continue;
- }
+ } else {
#if defined(TARGET_ARM) || defined (TARGET_MIPS)
- /* The bottom address bit marks a Thumb or MIPS16 symbol. */
- syms[i].st_value &= ~(target_ulong)1;
+ /* The bottom address bit marks a Thumb or MIPS16 symbol. */
+ syms[i].st_value &= ~(target_ulong)1;
#endif
- i++;
+ syms[i].st_value += load_bias;
+ i++;
+ }
+ }
+
+ /* No "useful" symbol. */
+ if (nsyms == 0) {
+ goto give_up;
+ }
+
+ /* 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) {
+ goto give_up;
}
- syms = realloc(syms, nsyms * sizeof(*syms));
+ 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)
- return;
s->disas_num_syms = nsyms;
#if ELF_CLASS == ELFCLASS32
s->disas_symtab.elf32 = syms;
- s->lookup_symbol = lookup_symbolxx;
#else
s->disas_symtab.elf64 = syms;
- s->lookup_symbol = lookup_symbolxx;
#endif
+ s->lookup_symbol = lookup_symbolxx;
s->next = syminfos;
syminfos = s;
+
+ return;
+
+give_up:
+ free(s);
+ free(strings);
+ free(syms);
}
int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
struct image_info * info)
{
+ struct image_info interp_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 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 */
- bswap_ehdr(&elf_ex);
-
- /* 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;
- }
-
- i = elf_ex.e_phnum * sizeof(struct elf_phdr);
- if (elf_ex.e_phoff + i <= BPRM_BUF_SIZE) {
- memcpy(elf_phdata, bprm->buf + elf_ex.e_phoff, i);
- } else {
- retval = pread(bprm->fd, (char *) elf_phdata, i, elf_ex.e_phoff);
- if (retval != i) {
- perror("load_elf_binary");
- exit(-1);
- }
- }
- bswap_phdr(elf_phdata, elf_ex.e_phnum);
-
- 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;
-
- elf_ppnt = elf_phdata;
- 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;
- }
-
- if (elf_ppnt->p_offset + elf_ppnt->p_filesz <= BPRM_BUF_SIZE) {
- memcpy(elf_interpreter, bprm->buf + elf_ppnt->p_offset,
- elf_ppnt->p_filesz);
- } else {
- retval = pread(bprm->fd, elf_interpreter, elf_ppnt->p_filesz,
- elf_ppnt->p_offset);
- if (retval != elf_ppnt->p_filesz) {
- 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;
- }
-
- retval = open(path(elf_interpreter), O_RDONLY);
- if (retval < 0) {
- perror(elf_interpreter);
- exit(-1);
- }
- interpreter_fd = retval;
-
- retval = read(interpreter_fd, bprm->buf, BPRM_BUF_SIZE);
- if (retval < 0) {
- perror("load_elf_binary3");
- exit(-1);
- }
- if (retval < BPRM_BUF_SIZE) {
- memset(bprm->buf, 0, BPRM_BUF_SIZE - retval);
- }
+ char *elf_interpreter = NULL;
- interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */
- interp_elf_ex = *((struct elfhdr *) bprm->buf); /* elf exec-header */
- }
- 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;
+ info->rss = 0;
-#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 || reserved_va)) {
- /*
- * Go through ELF program header table and find the address
- * range used by loadable segments. Check that this is available on
- * the host, and if not find a suitable value for guest_base. */
- abi_ulong app_start = ~0;
- abi_ulong app_end = 0;
- abi_ulong addr;
- unsigned long host_start;
- unsigned long real_start;
- unsigned long host_size;
- for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum;
- i++, elf_ppnt++) {
- if (elf_ppnt->p_type != PT_LOAD)
- continue;
- addr = elf_ppnt->p_vaddr;
- if (addr < app_start) {
- app_start = addr;
- }
- addr += elf_ppnt->p_memsz;
- if (addr > app_end) {
- app_end = addr;
- }
- }
+ load_elf_image(bprm->filename, bprm->fd, info,
+ &elf_interpreter, bprm->buf);
- /* If we don't have any loadable segments then something
- is very wrong. */
- assert(app_start < app_end);
+ /* ??? We need a copy of the elf header for passing to create_elf_tables.
+ If we do nothing, we'll have overwritten this when we re-use bprm->buf
+ when we load the interpreter. */
+ elf_ex = *(struct elfhdr *)bprm->buf;
- /* Round addresses to page boundaries. */
- app_start = app_start & qemu_host_page_mask;
- app_end = HOST_PAGE_ALIGN(app_end);
- if (app_start < mmap_min_addr) {
- host_start = HOST_PAGE_ALIGN(mmap_min_addr);
- } else {
- host_start = app_start;
- if (host_start != app_start) {
- fprintf(stderr, "qemu: Address overflow loading ELF binary\n");
- abort();
- }
- }
- host_size = app_end - app_start;
- while (1) {
- /* Do not use mmap_find_vma here because that is limited to the
- guest address space. We are going to make the
- guest address space fit whatever we're given. */
- real_start = (unsigned long)mmap((void *)host_start, host_size,
- PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE, -1, 0);
- if (real_start == (unsigned long)-1) {
- fprintf(stderr, "qemu: Virtual memory exausted\n");
- abort();
- }
- if (real_start == host_start) {
- break;
- }
- /* That address didn't work. Unmap and try a different one.
- The address the host picked because is typically
- right at the top of the host address space and leaves the
- guest with no usable address space. Resort to a linear search.
- We already compensated for mmap_min_addr, so this should not
- happen often. Probably means we got unlucky and host address
- space randomization put a shared library somewhere
- inconvenient. */
- munmap((void *)real_start, host_size);
- host_start += qemu_host_page_size;
- if (host_start == app_start) {
- /* Theoretically possible if host doesn't have any
- suitably aligned areas. Normally the first mmap will
- fail. */
- fprintf(stderr, "qemu: Unable to find space for application\n");
- abort();
- }
- }
- qemu_log("Relocating guest address space from 0x" TARGET_ABI_FMT_lx
- " to 0x%lx\n", app_start, real_start);
- guest_base = real_start - app_start;
+ 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) {
+ fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
+ exit(-1);
}
-#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);
- }
+ if (elf_interpreter) {
+ load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
-#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 the program interpreter is one of these two, then assume
+ an iBCS2 image. Otherwise assume a native linux image. */
- 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 ((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 = TARGET_PAGE_ALIGN(k);
- }
+ if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
+ || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
+ info->personality = PER_SVR4;
- /* If the load segment requests extra zeros (e.g. bss), map it. */
- if (elf_ppnt->p_filesz < elf_ppnt->p_memsz) {
- abi_ulong base = load_bias + elf_ppnt->p_vaddr;
- zero_bss(base + elf_ppnt->p_filesz,
- base + elf_ppnt->p_memsz, elf_prot);
+ /* 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. */
+ target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
+ MAP_FIXED | MAP_PRIVATE, -1, 0);
}
}
- elf_entry += load_bias;
- elf_brk += load_bias;
- start_code += load_bias;
- end_code += load_bias;
- start_data += load_bias;
- end_data += load_bias;
+ bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
+ info, (elf_interpreter ? &interp_info : NULL));
+ info->start_stack = bprm->p;
+ /* If we have an interpreter, set that as the program's entry point.
+ Copy the load_addr as well, to help PPC64 interpret the entry
+ point as a function descriptor. Do this after creating elf tables
+ so that we copy the original program entry point into the AUXV. */
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, bprm->buf);
- }
- reloc_func_desc = interp_load_addr;
-
- close(interpreter_fd);
+ info->load_addr = interp_info.load_addr;
+ info->entry = interp_info.entry;
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;
-
-#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;
-
#ifdef USE_ELF_CORE_DUMP
bprm->core_dump = &elf_core_dump;
#endif
size_t namesz_rounded;
int type;
size_t datasz;
+ size_t datasz_rounded;
void *data;
size_t notesz;
};
struct target_elf_siginfo {
- int si_signo; /* signal number */
- int si_code; /* extra code */
- int si_errno; /* errno */
+ target_int si_signo; /* signal number */
+ target_int si_code; /* extra code */
+ target_int si_errno; /* errno */
};
struct target_elf_prstatus {
struct target_elf_siginfo pr_info; /* Info associated with signal */
- short pr_cursig; /* Current signal */
+ target_short pr_cursig; /* Current signal */
target_ulong pr_sigpend; /* XXX */
target_ulong pr_sighold; /* XXX */
target_pid_t pr_pid;
struct target_timeval pr_cutime; /* XXX Cumulative user time */
struct target_timeval pr_cstime; /* XXX Cumulative system time */
target_elf_gregset_t pr_reg; /* GP registers */
- int pr_fpvalid; /* XXX */
+ target_int pr_fpvalid; /* XXX */
};
#define ELF_PRARGSZ (80) /* Number of chars for args */
note->namesz = namesz;
note->namesz_rounded = roundup(namesz, sizeof (int32_t));
note->type = type;
- note->datasz = roundup(sz, sizeof (int32_t));;
+ note->datasz = sz;
+ note->datasz_rounded = roundup(sz, sizeof (int32_t));
+
note->data = data;
/*
* ELF document.
*/
note->notesz = sizeof (struct elf_note) +
- note->namesz_rounded + note->datasz;
+ note->namesz_rounded + note->datasz_rounded;
}
static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
return (-1);
if (dump_write(fd, men->name, men->namesz_rounded) != 0)
return (-1);
- if (dump_write(fd, men->data, men->datasz) != 0)
+ if (dump_write(fd, men->data, men->datasz_rounded) != 0)
return (-1);
return (0);
* ELF specification wants data to start at page boundary so
* we align it here.
*/
- offset = roundup(offset, ELF_EXEC_PAGESIZE);
+ data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE);
/*
* Write program headers for memory regions mapped in
phdr.p_flags |= PF_X;
phdr.p_align = ELF_EXEC_PAGESIZE;
+ bswap_phdr(&phdr, 1);
dump_write(fd, &phdr, sizeof (phdr));
}
goto out;
/* align data to page boundary */
- data_offset = lseek(fd, 0, SEEK_CUR);
- data_offset = TARGET_PAGE_ALIGN(data_offset);
if (lseek(fd, data_offset, SEEK_SET) != data_offset)
goto out;
return (-errno);
return (0);
}
-
#endif /* USE_ELF_CORE_DUMP */
-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);