static boolean_t elf32_arm_abi_supported(struct image_params *imgp) { const Elf_Ehdr *hdr = (const Elf_Ehdr *)imgp->image_header; /* * When configured for EABI, FreeBSD supports EABI vesions 4 and 5. */ if (EF_ARM_EABI_VERSION(hdr->e_flags) < EF_ARM_EABI_FREEBSD_MIN) { if (bootverbose) uprintf("Attempting to execute non EABI binary (rev %d) image %s", EF_ARM_EABI_VERSION(hdr->e_flags), imgp->args->fname); return (FALSE); } return (TRUE); }
static int is_executable(const char *fname, int fd, int *is_shlib, int *type) { union { #ifdef AOUT_SUPPORTED struct exec aout; #endif #if __ELF_WORD_SIZE > 32 && defined(ELF32_SUPPORTED) Elf32_Ehdr elf32; #endif Elf_Ehdr elf; } hdr; int n; *is_shlib = 0; *type = TYPE_UNKNOWN; if ((n = read(fd, &hdr, sizeof(hdr))) == -1) { warn("%s: can't read program header", fname); return (0); } #ifdef AOUT_SUPPORTED if ((size_t)n >= sizeof(hdr.aout) && !N_BADMAG(hdr.aout)) { /* a.out file */ if ((N_GETFLAG(hdr.aout) & EX_DPMASK) != EX_DYNAMIC #if 1 /* Compatibility */ || hdr.aout.a_entry < __LDPGSZ #endif ) { warnx("%s: not a dynamic executable", fname); return (0); } *type = TYPE_AOUT; return (1); } #endif #if __ELF_WORD_SIZE > 32 && defined(ELF32_SUPPORTED) if ((size_t)n >= sizeof(hdr.elf32) && IS_ELF(hdr.elf32) && hdr.elf32.e_ident[EI_CLASS] == ELFCLASS32) { /* Handle 32 bit ELF objects */ Elf32_Phdr phdr; int dynamic, i; dynamic = 0; *type = TYPE_ELF32; if (lseek(fd, hdr.elf32.e_phoff, SEEK_SET) == -1) { warnx("%s: header too short", fname); return (0); } for (i = 0; i < hdr.elf32.e_phnum; i++) { if (read(fd, &phdr, hdr.elf32.e_phentsize) != sizeof(phdr)) { warnx("%s: can't read program header", fname); return (0); } if (phdr.p_type == PT_DYNAMIC) { dynamic = 1; break; } } if (!dynamic) { warnx("%s: not a dynamic ELF executable", fname); return (0); } if (hdr.elf32.e_type == ET_DYN) { if (hdr.elf32.e_ident[EI_OSABI] == ELFOSABI_FREEBSD) { *is_shlib = 1; return (1); } warnx("%s: not a FreeBSD ELF shared object", fname); return (0); } return (1); } #endif if ((size_t)n >= sizeof(hdr.elf) && IS_ELF(hdr.elf) && hdr.elf.e_ident[EI_CLASS] == ELF_TARG_CLASS) { /* Handle default ELF objects on this architecture */ Elf_Phdr phdr; int dynamic, i; dynamic = 0; *type = TYPE_ELF; if (lseek(fd, hdr.elf.e_phoff, SEEK_SET) == -1) { warnx("%s: header too short", fname); return (0); } for (i = 0; i < hdr.elf.e_phnum; i++) { if (read(fd, &phdr, hdr.elf.e_phentsize) != sizeof(phdr)) { warnx("%s: can't read program header", fname); return (0); } if (phdr.p_type == PT_DYNAMIC) { dynamic = 1; break; } } if (!dynamic) { warnx("%s: not a dynamic ELF executable", fname); return (0); } if (hdr.elf.e_type == ET_DYN) { switch (hdr.elf.e_ident[EI_OSABI]) { case ELFOSABI_FREEBSD: *is_shlib = 1; return (1); #ifdef __ARM_EABI__ case ELFOSABI_NONE: if (hdr.elf.e_machine != EM_ARM) break; if (EF_ARM_EABI_VERSION(hdr.elf.e_flags) < EF_ARM_EABI_FREEBSD_MIN) break; *is_shlib = 1; return (1); #endif } warnx("%s: not a FreeBSD ELF shared object", fname); return (0); } return (1); } warnx("%s: not a dynamic executable", fname); return (0); }