elf_ops.h
5.72 KB
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#ifdef BSWAP_NEEDED
static void glue(bswap_ehdr, SZ)(struct elfhdr *ehdr)
{
bswap16s(&ehdr->e_type); /* Object file type */
bswap16s(&ehdr->e_machine); /* Architecture */
bswap32s(&ehdr->e_version); /* Object file version */
bswapSZs(&ehdr->e_entry); /* Entry point virtual address */
bswapSZs(&ehdr->e_phoff); /* Program header table file offset */
bswapSZs(&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 glue(bswap_phdr, SZ)(struct elf_phdr *phdr)
{
bswap32s(&phdr->p_type); /* Segment type */
bswapSZs(&phdr->p_offset); /* Segment file offset */
bswapSZs(&phdr->p_vaddr); /* Segment virtual address */
bswapSZs(&phdr->p_paddr); /* Segment physical address */
bswapSZs(&phdr->p_filesz); /* Segment size in file */
bswapSZs(&phdr->p_memsz); /* Segment size in memory */
bswap32s(&phdr->p_flags); /* Segment flags */
bswapSZs(&phdr->p_align); /* Segment alignment */
}
static void glue(bswap_shdr, SZ)(struct elf_shdr *shdr)
{
bswap32s(&shdr->sh_name);
bswap32s(&shdr->sh_type);
bswapSZs(&shdr->sh_flags);
bswapSZs(&shdr->sh_addr);
bswapSZs(&shdr->sh_offset);
bswapSZs(&shdr->sh_size);
bswap32s(&shdr->sh_link);
bswap32s(&shdr->sh_info);
bswapSZs(&shdr->sh_addralign);
bswapSZs(&shdr->sh_entsize);
}
static void glue(bswap_sym, SZ)(struct elf_sym *sym)
{
bswap32s(&sym->st_name);
bswapSZs(&sym->st_value);
bswapSZs(&sym->st_size);
bswap16s(&sym->st_shndx);
}
#endif
static int glue(find_phdr, SZ)(struct elfhdr *ehdr, int fd, struct elf_phdr *phdr, elf_word type)
{
int i, retval;
retval = lseek(fd, ehdr->e_phoff, SEEK_SET);
if (retval < 0)
return -1;
for (i = 0; i < ehdr->e_phnum; i++) {
retval = read(fd, phdr, sizeof(*phdr));
if (retval < 0)
return -1;
glue(bswap_phdr, SZ)(phdr);
if (phdr->p_type == type)
return 0;
}
return -1;
}
static void * glue(find_shdr, SZ)(struct elfhdr *ehdr, int fd, struct elf_shdr *shdr, elf_word type)
{
int i, retval;
retval = lseek(fd, ehdr->e_shoff, SEEK_SET);
if (retval < 0)
return NULL;
for (i = 0; i < ehdr->e_shnum; i++) {
retval = read(fd, shdr, sizeof(*shdr));
if (retval < 0)
return NULL;
glue(bswap_shdr, SZ)(shdr);
if (shdr->sh_type == type)
return qemu_malloc(shdr->sh_size);
}
return NULL;
}
static void * glue(find_strtab, SZ)(struct elfhdr *ehdr, int fd, struct elf_shdr *shdr, struct elf_shdr *symtab)
{
int retval;
retval = lseek(fd, ehdr->e_shoff + sizeof(struct elf_shdr) * symtab->sh_link, SEEK_SET);
if (retval < 0)
return NULL;
retval = read(fd, shdr, sizeof(*shdr));
if (retval < 0)
return NULL;
glue(bswap_shdr, SZ)(shdr);
if (shdr->sh_type == SHT_STRTAB)
return qemu_malloc(shdr->sh_size);;
return NULL;
}
static int glue(read_program, SZ)(int fd, struct elf_phdr *phdr, void *dst, elf_word entry)
{
int retval;
retval = lseek(fd, phdr->p_offset + entry - phdr->p_vaddr, SEEK_SET);
if (retval < 0)
return -1;
return read(fd, dst, phdr->p_filesz);
}
static int glue(read_section, SZ)(int fd, struct elf_shdr *s, void *dst)
{
int retval;
retval = lseek(fd, s->sh_offset, SEEK_SET);
if (retval < 0)
return -1;
retval = read(fd, dst, s->sh_size);
if (retval < 0)
return -1;
return 0;
}
static void * glue(process_section, SZ)(struct elfhdr *ehdr, int fd, struct elf_shdr *shdr, elf_word type)
{
void *dst;
dst = glue(find_shdr, SZ)(ehdr, fd, shdr, type);
if (!dst)
goto error;
if (glue(read_section, SZ)(fd, shdr, dst))
goto error;
return dst;
error:
qemu_free(dst);
return NULL;
}
static void * glue(process_strtab, SZ)(struct elfhdr *ehdr, int fd, struct elf_shdr *shdr, struct elf_shdr *symtab)
{
void *dst;
dst = glue(find_strtab, SZ)(ehdr, fd, shdr, symtab);
if (!dst)
goto error;
if (glue(read_section, SZ)(fd, shdr, dst))
goto error;
return dst;
error:
qemu_free(dst);
return NULL;
}
static void glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd)
{
struct elf_shdr symtab, strtab;
struct elf_sym *syms;
#if (SZ == 64)
struct elf32_sym *syms32;
#endif
struct syminfo *s;
int nsyms, i;
char *str;
/* Symbol table */
syms = glue(process_section, SZ)(ehdr, fd, &symtab, SHT_SYMTAB);
if (!syms)
return;
nsyms = symtab.sh_size / sizeof(struct elf_sym);
#if (SZ == 64)
syms32 = qemu_mallocz(nsyms * sizeof(struct elf32_sym));
#endif
for (i = 0; i < nsyms; i++) {
glue(bswap_sym, SZ)(&syms[i]);
#if (SZ == 64)
syms32[i].st_name = syms[i].st_name;
syms32[i].st_info = syms[i].st_info;
syms32[i].st_other = syms[i].st_other;
syms32[i].st_shndx = syms[i].st_shndx;
syms32[i].st_value = syms[i].st_value & 0xffffffff;
syms32[i].st_size = syms[i].st_size & 0xffffffff;
#endif
}
/* String table */
str = glue(process_strtab, SZ)(ehdr, fd, &strtab, &symtab);
if (!str)
goto error_freesyms;
/* Commit */
s = qemu_mallocz(sizeof(*s));
#if (SZ == 64)
s->disas_symtab = syms32;
qemu_free(syms);
#else
s->disas_symtab = syms;
#endif
s->disas_num_syms = nsyms;
s->disas_strtab = str;
s->next = syminfos;
syminfos = s;
return;
error_freesyms:
#if (SZ == 64)
qemu_free(syms32);
#endif
qemu_free(syms);
return;
}