diff options
| -rw-r--r-- | common/elf.c | 45 | ||||
| -rw-r--r-- | include/elf.h | 29 |
2 files changed, 51 insertions, 23 deletions
diff --git a/common/elf.c b/common/elf.c index 8edf388564..4733accb05 100644 --- a/common/elf.c +++ b/common/elf.c @@ -45,29 +45,31 @@ static void elf_release_regions(struct elf_image *elf) static int load_elf_phdr_segment(struct elf_image *elf, void *src, - Elf32_Phdr *phdr) + void *phdr) { - void *dst = (void *)phdr->p_paddr; + void *dst = (void *) elf_phdr_p_paddr(elf, phdr); int ret; + u64 p_filesz = elf_phdr_p_filesz(elf, phdr); + u64 p_memsz = elf_phdr_p_memsz(elf, phdr); /* we care only about PT_LOAD segments */ - if (phdr->p_type != PT_LOAD) + if (elf_phdr_p_type(elf, phdr) != PT_LOAD) return 0; - if (!phdr->p_filesz) + if (!p_filesz) return 0; - pr_debug("Loading phdr to 0x%p (%i bytes)\n", dst, phdr->p_filesz); + pr_debug("Loading phdr to 0x%p (%llu bytes)\n", dst, p_filesz); - ret = elf_request_region(elf, (resource_size_t)dst, phdr->p_filesz); + ret = elf_request_region(elf, (resource_size_t)dst, p_filesz); if (ret) return ret; - memcpy(dst, src, phdr->p_filesz); + memcpy(dst, src, p_filesz); - if (phdr->p_filesz < phdr->p_memsz) - memset(dst + phdr->p_filesz, 0x00, - phdr->p_memsz - phdr->p_filesz); + if (p_filesz < p_memsz) + memset(dst + p_filesz, 0x00, + p_memsz - p_filesz); return 0; } @@ -75,14 +77,13 @@ static int load_elf_phdr_segment(struct elf_image *elf, void *src, static int load_elf_image_phdr(struct elf_image *elf) { void *buf = elf->buf; - Elf32_Ehdr *ehdr = buf; - Elf32_Phdr *phdr = (Elf32_Phdr *)(buf + ehdr->e_phoff); + void *phdr = (void *) (buf + elf_hdr_e_phoff(elf, buf)); int i, ret; - elf->entry = ehdr->e_entry; + elf->entry = elf_hdr_e_entry(elf, buf); - for (i = 0; i < ehdr->e_phnum; ++i) { - void *src = buf + phdr->p_offset; + for (i = 0; i < elf_hdr_e_phnum(elf, buf) ; ++i) { + void *src = buf + elf_phdr_p_offset(elf, phdr); ret = load_elf_phdr_segment(elf, src, phdr); /* in case of error elf_load_image() caller should clean up and @@ -90,22 +91,22 @@ static int load_elf_image_phdr(struct elf_image *elf) if (ret) return ret; - ++phdr; + phdr += elf_size_of_phdr(elf); } return 0; } -static int elf_check_image(void *buf) +static int elf_check_image(struct elf_image *elf) { - Elf32_Ehdr *ehdr = (Elf32_Ehdr *)buf; - - if (strncmp(buf, ELFMAG, SELFMAG)) { + if (strncmp(elf->buf, ELFMAG, SELFMAG)) { pr_err("ELF magic not found.\n"); return -EINVAL; } - if (ehdr->e_type != ET_EXEC) { + elf->class = ((char *) elf->buf)[EI_CLASS]; + + if (elf_hdr_e_type(elf, elf->buf) != ET_EXEC) { pr_err("Non EXEC ELF image.\n"); return -ENOEXEC; } @@ -124,7 +125,7 @@ struct elf_image *elf_load_image(void *buf) elf->buf = buf; - ret = elf_check_image(buf); + ret = elf_check_image(elf); if (ret) return ERR_PTR(ret); diff --git a/include/elf.h b/include/elf.h index 92c8d9c127..633f4992dd 100644 --- a/include/elf.h +++ b/include/elf.h @@ -400,11 +400,38 @@ static inline void arch_write_notes(struct file *file) { } struct elf_image { struct list_head list; - unsigned long entry; + u8 class; + u64 entry; void *buf; }; struct elf_image *elf_load_image(void *buf); void elf_release_image(struct elf_image *elf); +#define ELF_GET_FIELD(__s, __field, __type) \ +static inline __type elf_##__s##_##__field(struct elf_image *elf, void *arg) { \ + if (elf->class == ELFCLASS32) \ + return (__type) ((struct elf32_##__s *) arg)->__field; \ + else \ + return (__type) ((struct elf64_##__s *) arg)->__field; \ +} + +ELF_GET_FIELD(hdr, e_entry, u64) +ELF_GET_FIELD(hdr, e_phnum, u16) +ELF_GET_FIELD(hdr, e_phoff, u64) +ELF_GET_FIELD(hdr, e_type, u16) +ELF_GET_FIELD(phdr, p_paddr, u64) +ELF_GET_FIELD(phdr, p_filesz, u64) +ELF_GET_FIELD(phdr, p_memsz, u64) +ELF_GET_FIELD(phdr, p_type, u32) +ELF_GET_FIELD(phdr, p_offset, u64) + +static inline unsigned long elf_size_of_phdr(struct elf_image *elf) +{ + if (elf->class == ELFCLASS32) + return sizeof(Elf32_Phdr); + else + return sizeof(Elf64_Phdr); +} + #endif /* _LINUX_ELF_H */ |