root / elf_ops.h @ f97572e5
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static void glue(bswap_ehdr, SZ)(struct elfhdr *ehdr) |
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{ |
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bswap16s(&ehdr->e_type); /* Object file type */
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bswap16s(&ehdr->e_machine); /* Architecture */
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bswap32s(&ehdr->e_version); /* Object file version */
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bswapSZs(&ehdr->e_entry); /* Entry point virtual address */
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bswapSZs(&ehdr->e_phoff); /* Program header table file offset */
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bswapSZs(&ehdr->e_shoff); /* Section header table file offset */
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bswap32s(&ehdr->e_flags); /* Processor-specific flags */
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bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
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bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
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bswap16s(&ehdr->e_phnum); /* Program header table entry count */
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bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
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bswap16s(&ehdr->e_shnum); /* Section header table entry count */
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bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
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} |
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static void glue(bswap_phdr, SZ)(struct elf_phdr *phdr) |
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{ |
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bswap32s(&phdr->p_type); /* Segment type */
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bswapSZs(&phdr->p_offset); /* Segment file offset */
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bswapSZs(&phdr->p_vaddr); /* Segment virtual address */
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bswapSZs(&phdr->p_paddr); /* Segment physical address */
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bswapSZs(&phdr->p_filesz); /* Segment size in file */
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bswapSZs(&phdr->p_memsz); /* Segment size in memory */
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bswap32s(&phdr->p_flags); /* Segment flags */
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bswapSZs(&phdr->p_align); /* Segment alignment */
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} |
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static void glue(bswap_shdr, SZ)(struct elf_shdr *shdr) |
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{ |
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bswap32s(&shdr->sh_name); |
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bswap32s(&shdr->sh_type); |
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bswapSZs(&shdr->sh_flags); |
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bswapSZs(&shdr->sh_addr); |
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bswapSZs(&shdr->sh_offset); |
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bswapSZs(&shdr->sh_size); |
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bswap32s(&shdr->sh_link); |
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bswap32s(&shdr->sh_info); |
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bswapSZs(&shdr->sh_addralign); |
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bswapSZs(&shdr->sh_entsize); |
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} |
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static void glue(bswap_sym, SZ)(struct elf_sym *sym) |
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{ |
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bswap32s(&sym->st_name); |
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bswapSZs(&sym->st_value); |
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bswapSZs(&sym->st_size); |
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bswap16s(&sym->st_shndx); |
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} |
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static struct elf_shdr *glue(find_section, SZ)(struct elf_shdr *shdr_table, |
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int n, int type) |
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{ |
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int i;
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for(i=0;i<n;i++) { |
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if (shdr_table[i].sh_type == type)
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return shdr_table + i;
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} |
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return NULL; |
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} |
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static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab) |
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{ |
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struct elf_shdr *symtab, *strtab, *shdr_table = NULL; |
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struct elf_sym *syms = NULL; |
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#if (SZ == 64) |
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struct elf32_sym *syms32 = NULL; |
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#endif
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struct syminfo *s;
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int nsyms, i;
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char *str = NULL; |
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shdr_table = load_at(fd, ehdr->e_shoff, |
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sizeof(struct elf_shdr) * ehdr->e_shnum); |
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if (!shdr_table)
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return -1; |
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if (must_swab) {
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for (i = 0; i < ehdr->e_shnum; i++) { |
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glue(bswap_shdr, SZ)(shdr_table + i); |
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} |
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} |
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|
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symtab = glue(find_section, SZ)(shdr_table, ehdr->e_shnum, SHT_SYMTAB); |
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if (!symtab)
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goto fail;
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syms = load_at(fd, symtab->sh_offset, symtab->sh_size); |
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if (!syms)
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goto fail;
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nsyms = symtab->sh_size / sizeof(struct elf_sym); |
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#if (SZ == 64) |
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syms32 = qemu_mallocz(nsyms * sizeof(struct elf32_sym)); |
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#endif
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for (i = 0; i < nsyms; i++) { |
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if (must_swab)
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glue(bswap_sym, SZ)(&syms[i]); |
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#if (SZ == 64) |
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syms32[i].st_name = syms[i].st_name; |
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syms32[i].st_info = syms[i].st_info; |
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syms32[i].st_other = syms[i].st_other; |
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syms32[i].st_shndx = syms[i].st_shndx; |
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syms32[i].st_value = syms[i].st_value & 0xffffffff;
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syms32[i].st_size = syms[i].st_size & 0xffffffff;
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#endif
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} |
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/* String table */
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if (symtab->sh_link >= ehdr->e_shnum)
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goto fail;
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strtab = &shdr_table[symtab->sh_link]; |
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str = load_at(fd, strtab->sh_offset, strtab->sh_size); |
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if (!str)
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goto fail;
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/* Commit */
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s = qemu_mallocz(sizeof(*s));
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#if (SZ == 64) |
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s->disas_symtab = syms32; |
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qemu_free(syms); |
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#else
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s->disas_symtab = syms; |
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#endif
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s->disas_num_syms = nsyms; |
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s->disas_strtab = str; |
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s->next = syminfos; |
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syminfos = s; |
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qemu_free(shdr_table); |
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return 0; |
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fail:
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#if (SZ == 64) |
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qemu_free(syms32); |
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#endif
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qemu_free(syms); |
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qemu_free(str); |
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qemu_free(shdr_table); |
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return -1; |
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} |
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static int glue(load_elf, SZ)(int fd, int64_t virt_to_phys_addend, |
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int must_swab, uint64_t *pentry,
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uint64_t *lowaddr, uint64_t *highaddr) |
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{ |
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struct elfhdr ehdr;
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struct elf_phdr *phdr = NULL, *ph; |
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int size, i, total_size;
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elf_word mem_size; |
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uint64_t addr, low = 0, high = 0; |
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uint8_t *data = NULL;
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if (read(fd, &ehdr, sizeof(ehdr)) != sizeof(ehdr)) |
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goto fail;
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if (must_swab) {
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glue(bswap_ehdr, SZ)(&ehdr); |
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} |
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if (ELF_MACHINE != ehdr.e_machine)
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goto fail;
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if (pentry)
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*pentry = (uint64_t)(elf_sword)ehdr.e_entry; |
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glue(load_symbols, SZ)(&ehdr, fd, must_swab); |
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size = ehdr.e_phnum * sizeof(phdr[0]); |
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lseek(fd, ehdr.e_phoff, SEEK_SET); |
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phdr = qemu_mallocz(size); |
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if (!phdr)
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goto fail;
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if (read(fd, phdr, size) != size)
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goto fail;
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if (must_swab) {
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for(i = 0; i < ehdr.e_phnum; i++) { |
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ph = &phdr[i]; |
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glue(bswap_phdr, SZ)(ph); |
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} |
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} |
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total_size = 0;
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for(i = 0; i < ehdr.e_phnum; i++) { |
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ph = &phdr[i]; |
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if (ph->p_type == PT_LOAD) {
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mem_size = ph->p_memsz; |
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/* XXX: avoid allocating */
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data = qemu_mallocz(mem_size); |
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if (ph->p_filesz > 0) { |
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if (lseek(fd, ph->p_offset, SEEK_SET) < 0) |
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goto fail;
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if (read(fd, data, ph->p_filesz) != ph->p_filesz)
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goto fail;
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} |
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addr = ph->p_vaddr + virt_to_phys_addend; |
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cpu_physical_memory_write_rom(addr, data, mem_size); |
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total_size += mem_size; |
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if (!low || addr < low)
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low = addr; |
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if (!high || (addr + mem_size) > high)
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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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} |
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qemu_free(phdr); |
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if (lowaddr)
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*lowaddr = (uint64_t)(elf_sword)low; |
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if (highaddr)
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*highaddr = (uint64_t)(elf_sword)high; |
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return total_size;
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fail:
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qemu_free(data); |
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qemu_free(phdr); |
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return -1; |
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} |