| 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) |
| { |
| hwaddr addr = *(hwaddr *)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, |
| hwaddr 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; |
| } |
