/* This is the Linux kernel elf-loading code, ported into user space */
-#include <sys/time.h>
+#include "qemu/osdep.h"
#include <sys/param.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <unistd.h>
-#include <sys/mman.h>
#include <sys/resource.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
#include "qemu.h"
#include "disas/disas.h"
+#include "qemu/path.h"
#ifdef _ARCH_PPC64
#undef ARCH_DLINFO
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;
+ regs->uregs[16] = ARM_CPU_MODE_USR;
+ if (infop->entry & 1) {
+ regs->uregs[16] |= CPSR_T;
+ }
+ regs->uregs[15] = infop->entry & 0xfffffffe;
+ regs->uregs[13] = 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 */
+ get_user_ual(regs->uregs[2], stack + 8); /* envp */
+ get_user_ual(regs->uregs[1], stack + 4); /* envp */
/* XXX: it seems that r0 is zeroed after ! */
- regs->ARM_r0 = 0;
+ regs->uregs[0] = 0;
/* For uClinux PIC binaries. */
/* XXX: Linux does this only on ARM with no MMU (do we care ?) */
- regs->ARM_r10 = infop->start_data;
+ regs->uregs[10] = infop->start_data;
}
#define ELF_NREG 18
#ifdef TARGET_PPC
+#define ELF_MACHINE PPC_ELF_MACHINE
#define ELF_START_MMAP 0x80000000
#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
Altivec/FP/SPE support. Anything else is just a bonus. */
#define GET_FEATURE(flag, feature) \
do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
-#define GET_FEATURE2(flag, feature) \
- do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
+#define GET_FEATURE2(flags, feature) \
+ do { \
+ if ((cpu->env.insns_flags2 & flags) == flags) { \
+ features |= feature; \
+ } \
+ } while (0)
GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
* 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)
+static abi_ulong copy_elf_strings(int argc, char **argv, char *scratch,
+ abi_ulong p, abi_ulong stack_limit)
{
- char *tmp, *tmp1, *pag = NULL;
- int len, offset = 0;
+ char *tmp;
+ int len, offset;
+ abi_ulong top = p;
if (!p) {
return 0; /* bullet-proofing */
}
+
+ offset = ((p - 1) % TARGET_PAGE_SIZE) + 1;
+
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 */
+ len = strlen(tmp) + 1;
+ tmp += len;
+
+ if (len > (p - stack_limit)) {
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);
+ 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(scratch + offset, tmp, bytes_to_copy);
+
+ if (offset == 0) {
+ memcpy_to_target(p, scratch, top - p);
+ top = p;
+ offset = TARGET_PAGE_SIZE;
}
}
}
+ if (offset) {
+ memcpy_to_target(p, scratch + offset, top - p);
+ }
+
return p;
}
-static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm,
+/* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of
+ * argument/environment space. Newer kernels (>2.6.33) allow more,
+ * dependent on stack size, but guarantee at least 32 pages for
+ * backwards compatibility.
+ */
+#define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE)
+
+static abi_ulong setup_arg_pages(struct linux_binprm *bprm,
struct image_info *info)
{
- abi_ulong stack_base, size, error, guard;
- int i;
+ abi_ulong size, error, guard;
- /* Create enough stack to hold everything. If we don't use
- it for args, we'll use it for something else. */
size = guest_stack_size;
- if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE) {
- size = MAX_ARG_PAGES*TARGET_PAGE_SIZE;
+ if (size < STACK_LOWER_LIMIT) {
+ size = STACK_LOWER_LIMIT;
}
guard = TARGET_PAGE_SIZE;
if (guard < qemu_real_host_page_size) {
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++) {
- 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;
+
+ return info->stack_limit + size - sizeof(void *);
}
/* Map and zero the bss. We need to explicitly zero any fractional pages
host_start = (uintptr_t) g2h(elf_bss);
host_end = (uintptr_t) g2h(last_bss);
- host_map_start = (host_start + qemu_real_host_page_size - 1);
- host_map_start &= -qemu_real_host_page_size;
+ host_map_start = REAL_HOST_PAGE_ALIGN(host_start);
if (host_map_start < host_end) {
void *p = mmap((void *)host_map_start, host_end - host_map_start,
}
}
- qemu_log("Reserved 0x%lx bytes of guest address space\n", host_size);
+ qemu_log_mask(CPU_LOG_PAGE, "Reserved 0x%lx bytes of guest address space\n", host_size);
return real_start;
}
}
guest_base = real_start - loaddr;
- qemu_log("Relocating guest address space from 0x"
- TARGET_ABI_FMT_lx " to 0x%lx\n",
- loaddr, real_start);
+ qemu_log_mask(CPU_LOG_PAGE, "Relocating guest address space from 0x"
+ TARGET_ABI_FMT_lx " to 0x%lx\n",
+ loaddr, real_start);
}
return;
info->pt_dynamic_addr = 0;
#endif
+ mmap_lock();
+
/* Find the maximum size of the image and allocate an appropriate
amount of memory to handle that. */
loaddr = -1, hiaddr = 0;
load_symbols(ehdr, image_fd, load_bias);
}
+ mmap_unlock();
+
close(image_fd);
return;
found:
/* Now know where the strtab and symtab are. Snarf them. */
- s = malloc(sizeof(*s));
+ s = g_try_new(struct syminfo, 1);
if (!s) {
goto give_up;
}
i = shdr[str_idx].sh_size;
- s->disas_strtab = strings = malloc(i);
+ s->disas_strtab = strings = g_try_malloc(i);
if (!strings || pread(fd, strings, i, shdr[str_idx].sh_offset) != i) {
goto give_up;
}
i = shdr[sym_idx].sh_size;
- syms = malloc(i);
+ syms = g_try_malloc(i);
if (!syms || pread(fd, syms, i, shdr[sym_idx].sh_offset) != i) {
goto give_up;
}
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));
+ new_syms = g_try_renew(struct elf_sym, syms, nsyms);
if (new_syms == NULL) {
goto give_up;
}
return;
give_up:
- free(s);
- free(strings);
- free(syms);
+ g_free(s);
+ g_free(strings);
+ g_free(syms);
}
int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
struct image_info interp_info;
struct elfhdr elf_ex;
char *elf_interpreter = NULL;
+ char *scratch;
info->start_mmap = (abi_ulong)ELF_START_MMAP;
- info->mmap = 0;
- info->rss = 0;
load_elf_image(bprm->filename, bprm->fd, info,
&elf_interpreter, bprm->buf);
when we load the interpreter. */
elf_ex = *(struct elfhdr *)bprm->buf;
- 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);
+ /* Do this so that we can load the interpreter, if need be. We will
+ change some of these later */
+ bprm->p = setup_arg_pages(bprm, info);
+
+ scratch = g_new0(char, TARGET_PAGE_SIZE);
+ bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
+ bprm->p, info->stack_limit);
+ bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
+ bprm->p, info->stack_limit);
+ bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
+ bprm->p, info->stack_limit);
+ g_free(scratch);
+
if (!bprm->p) {
fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
exit(-1);
}
- /* Do this so that we can load the interpreter, if need be. We will
- change some of these later */
- bprm->p = setup_arg_pages(bprm->p, bprm, info);
-
if (elf_interpreter) {
load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
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);
+ MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
}
}
size_t bufsize)
{
char timestamp[64];
- char *filename = NULL;
char *base_filename = NULL;
struct timeval tv;
struct tm tm;
return (-1);
}
- filename = strdup(ts->bprm->filename);
- base_filename = strdup(basename(filename));
+ base_filename = g_path_get_basename(ts->bprm->filename);
(void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
localtime_r(&tv.tv_sec, &tm));
(void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
base_filename, timestamp, (int)getpid());
- free(base_filename);
- free(filename);
+ g_free(base_filename);
return (0);
}
TaskState *ts = (TaskState *)cpu->opaque;
int i;
- info->notes = g_malloc0(NUMNOTES * sizeof (struct memelfnote));
+ info->notes = g_new0(struct memelfnote, NUMNOTES);
if (info->notes == NULL)
return (-ENOMEM);
info->prstatus = g_malloc0(sizeof (*info->prstatus));
phdr.p_align = ELF_EXEC_PAGESIZE;
bswap_phdr(&phdr, 1);
- dump_write(fd, &phdr, sizeof (phdr));
+ if (dump_write(fd, &phdr, sizeof(phdr)) != 0) {
+ goto out;
+ }
}
/*
projects / qemu.git / blobdiff