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(symfind, SZ)(const void *s0, const void *s1) { target_phys_addr_t addr = *(target_phys_addr_t *)s0; struct elf_sym *sym = (struct elf_sym *)s1; int result = 0; if (addr < sym->st_value) { result = -1; } else if (addr >= sym->st_value + sym->st_size) { result = 1; } return result; } static const char *glue(lookup_symbol, SZ)(struct syminfo *s, target_phys_addr_t orig_addr) { struct elf_sym *syms = glue(s->disas_symtab.elf, SZ); struct elf_sym *sym; sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), glue(symfind, SZ)); if (sym != NULL) { return s->disas_strtab + sym->st_name; } return ""; } static int glue(symcmp, SZ)(const void *s0, const void *s1) { struct elf_sym *sym0 = (struct elf_sym *)s0; struct elf_sym *sym1 = (struct elf_sym *)s1; return (sym0->st_value < sym1->st_value) ? -1 : ((sym0->st_value > sym1->st_value) ? 1 : 0); } static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab, int clear_lsb) { struct elf_shdr *symtab, *strtab, *shdr_table = NULL; struct elf_sym *syms = NULL; 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); i = 0; while (i < nsyms) { if (must_swab) glue(bswap_sym, SZ)(&syms[i]); /* We are only interested in function symbols. Throw everything else away. */ 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) { syms[i] = syms[nsyms]; } continue; } if (clear_lsb) { /* The bottom address bit marks a Thumb or MIPS16 symbol. */ syms[i].st_value &= ~(glue(glue(Elf, SZ), _Addr))1; } i++; } if (nsyms) { syms = g_realloc(syms, nsyms * sizeof(*syms)); qsort(syms, nsyms, sizeof(*syms), glue(symcmp, SZ)); for (i = 0; i < nsyms - 1; i++) { if (syms[i].st_size == 0) { syms[i].st_size = syms[i + 1].st_value - syms[i].st_value; } } } else { g_free(syms); syms = NULL; } /* 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 = g_malloc0(sizeof(*s)); s->lookup_symbol = glue(lookup_symbol, SZ); glue(s->disas_symtab.elf, SZ) = syms; s->disas_num_syms = nsyms; s->disas_strtab = str; s->next = syminfos; syminfos = s; g_free(shdr_table); return 0; fail: g_free(syms); g_free(str); g_free(shdr_table); return -1; } static int glue(load_elf, SZ)(const char *name, int fd, uint64_t (*translate_fn)(void *, uint64_t), void *translate_opaque, int must_swab, uint64_t *pentry, uint64_t *lowaddr, uint64_t *highaddr, int elf_machine, int clear_lsb) { struct elfhdr ehdr; struct elf_phdr *phdr = NULL, *ph; int size, i, total_size; elf_word mem_size; uint64_t addr, low = (uint64_t)-1, high = 0; uint8_t *data = NULL; char label[128]; if (read(fd, &ehdr, sizeof(ehdr)) != sizeof(ehdr)) goto fail; if (must_swab) { glue(bswap_ehdr, SZ)(&ehdr); } switch (elf_machine) { case EM_PPC64: if (EM_PPC64 != ehdr.e_machine) if (EM_PPC != ehdr.e_machine) goto fail; break; case EM_X86_64: if (EM_X86_64 != ehdr.e_machine) if (EM_386 != ehdr.e_machine) goto fail; break; case EM_MICROBLAZE: if (EM_MICROBLAZE != ehdr.e_machine) if (EM_MICROBLAZE_OLD != ehdr.e_machine) goto fail; break; default: if (elf_machine != ehdr.e_machine) goto fail; } if (pentry) *pentry = (uint64_t)(elf_sword)ehdr.e_entry; glue(load_symbols, SZ)(&ehdr, fd, must_swab, clear_lsb); size = ehdr.e_phnum * sizeof(phdr[0]); lseek(fd, ehdr.e_phoff, SEEK_SET); phdr = g_malloc0(size); if (!phdr) goto fail; if (read(fd, phdr, size) != size) goto fail; 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 = g_malloc0(mem_size); if (ph->p_filesz > 0) { if (lseek(fd, ph->p_offset, SEEK_SET) < 0) goto fail; if (read(fd, data, ph->p_filesz) != ph->p_filesz) goto fail; } /* address_offset is hack for kernel images that are linked at the wrong physical address. */ if (translate_fn) { addr = translate_fn(translate_opaque, ph->p_paddr); } else { addr = ph->p_paddr; } /* the entry pointer in the ELF header is a virtual * address, if the text segments paddr and vaddr differ * we need to adjust the entry */ if (pentry && !translate_fn && ph->p_vaddr != ph->p_paddr && ehdr.e_entry >= ph->p_vaddr && ehdr.e_entry < ph->p_vaddr + ph->p_filesz && ph->p_flags & PF_X) { *pentry = ehdr.e_entry - ph->p_vaddr + ph->p_paddr; } snprintf(label, sizeof(label), "phdr #%d: %s", i, name); rom_add_blob_fixed(label, data, mem_size, addr); total_size += mem_size; if (addr < low) low = addr; if ((addr + mem_size) > high) high = addr + mem_size; g_free(data); data = NULL; } } g_free(phdr); if (lowaddr) *lowaddr = (uint64_t)(elf_sword)low; if (highaddr) *highaddr = (uint64_t)(elf_sword)high; return total_size; fail: g_free(data); g_free(phdr); return -1; }