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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);
}
static struct elf_shdr *glue(find_section, SZ)(struct elf_shdr *shdr_table,
int n, int type)
{
int i;
for(i=0;i<n;i++) {
if (shdr_table[i].sh_type == type)
return shdr_table + i;
}
return NULL;
}
static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab)
{
struct elf_shdr *symtab, *strtab, *shdr_table = NULL;
struct elf_sym *syms = NULL;
#if (SZ == 64)
struct elf32_sym *syms32 = NULL;
#endif
struct syminfo *s;
int nsyms, i;
char *str = NULL;
shdr_table = load_at(fd, ehdr->e_shoff,
sizeof(struct elf_shdr) * ehdr->e_shnum);
if (!shdr_table)
return -1;
if (must_swab) {
for (i = 0; i < ehdr->e_shnum; i++) {
glue(bswap_shdr, SZ)(shdr_table + i);
}
}
symtab = glue(find_section, SZ)(shdr_table, ehdr->e_shnum, SHT_SYMTAB);
if (!symtab)
goto fail;
syms = load_at(fd, symtab->sh_offset, symtab->sh_size);
if (!syms)
goto fail;
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++) {
if (must_swab)
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 */
if (symtab->sh_link >= ehdr->e_shnum)
goto fail;
strtab = &shdr_table[symtab->sh_link];
str = load_at(fd, strtab->sh_offset, strtab->sh_size);
if (!str)
goto fail;
/* 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;
qemu_free(shdr_table);
return 0;
fail:
#if (SZ == 64)
qemu_free(syms32);
#endif
qemu_free(syms);
qemu_free(str);
qemu_free(shdr_table);
return -1;
}
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141
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int glue(load_elf, SZ)(int fd, int64_t virt_to_phys_addend,
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int must_swab, uint64_t *pentry,
uint64_t *lowaddr, uint64_t *highaddr)
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{
struct elfhdr ehdr;
struct elf_phdr *phdr = NULL, *ph;
int size, i, total_size;
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elf_word low = 0, high = 0;
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149
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elf_word mem_size, addr;
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150
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uint8_t *data = NULL;
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if (read(fd, &ehdr, sizeof(ehdr)) != sizeof(ehdr))
goto fail;
if (must_swab) {
glue(bswap_ehdr, SZ)(&ehdr);
}
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if (ELF_MACHINE != ehdr.e_machine)
goto fail;
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if (pentry)
*pentry = (uint64_t)ehdr.e_entry;
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glue(load_symbols, SZ)(&ehdr, fd, must_swab);
size = ehdr.e_phnum * sizeof(phdr[0]);
lseek(fd, ehdr.e_phoff, SEEK_SET);
phdr = qemu_mallocz(size);
if (!phdr)
goto fail;
if (read(fd, phdr, size) != size)
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ths
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172
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goto fail;
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if (must_swab) {
for(i = 0; i < ehdr.e_phnum; i++) {
ph = &phdr[i];
glue(bswap_phdr, SZ)(ph);
}
}
total_size = 0;
for(i = 0; i < ehdr.e_phnum; i++) {
ph = &phdr[i];
if (ph->p_type == PT_LOAD) {
mem_size = ph->p_memsz;
/* XXX: avoid allocating */
data = qemu_mallocz(mem_size);
if (ph->p_filesz > 0) {
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if (lseek(fd, ph->p_offset, SEEK_SET) < 0)
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189
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goto fail;
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if (read(fd, data, ph->p_filesz) != ph->p_filesz)
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191
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goto fail;
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}
addr = ph->p_vaddr + virt_to_phys_addend;
cpu_physical_memory_write_rom(addr, data, mem_size);
total_size += mem_size;
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if (!low || addr < low)
low = addr;
if (!high || (addr + mem_size) > high)
high = addr + mem_size;
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qemu_free(data);
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data = NULL;
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}
}
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qemu_free(phdr);
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if (lowaddr)
*lowaddr = (uint64_t)low;
if (highaddr)
*highaddr = (uint64_t)high;
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return total_size;
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ths
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213
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fail:
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qemu_free(data);
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qemu_free(phdr);
return -1;
}
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