diff options
Diffstat (limited to 'include/elf/internal.h')
| -rw-r--r-- | include/elf/internal.h | 54 |
1 files changed, 36 insertions, 18 deletions
diff --git a/include/elf/internal.h b/include/elf/internal.h index 1dd336d..6998ae0 100644 --- a/include/elf/internal.h +++ b/include/elf/internal.h @@ -291,37 +291,55 @@ struct elf_segment_map /* .tbss is special. It doesn't contribute memory space to normal segments and it doesn't take file space in normal segments. */ +#define ELF_TBSS_SPECIAL(sec_hdr, segment) \ + (((sec_hdr)->sh_flags & SHF_TLS) != 0 \ + && (sec_hdr)->sh_type == SHT_NOBITS \ + && (segment)->p_type != PT_TLS) + #define ELF_SECTION_SIZE(sec_hdr, segment) \ - ((!(((sec_hdr)->sh_flags & SHF_TLS) != 0 \ - && (sec_hdr)->sh_type == SHT_NOBITS) \ - || (segment)->p_type == PT_TLS) ? (sec_hdr)->sh_size : 0) - -/* Decide if the given sec_hdr is in the given segment. PT_TLS segment - contains only SHF_TLS sections. Only PT_LOAD, PT_GNU_RELRO and - and PT_TLS segments can contain SHF_TLS sections. */ -#define ELF_SECTION_IN_SEGMENT_1(sec_hdr, segment, check_vma) \ - ((((((sec_hdr)->sh_flags & SHF_TLS) != 0) \ + (ELF_TBSS_SPECIAL(sec_hdr, segment) ? 0 : (sec_hdr)->sh_size) + +/* Decide if the section SEC_HDR is in SEGMENT. If CHECK_VMA, then + VMAs are checked for alloc sections. If STRICT, then a zero size + section won't match at the end of a segment, unless the segment + is also zero size. */ +#define ELF_SECTION_IN_SEGMENT_1(sec_hdr, segment, check_vma, strict) \ + ((/* Only PT_LOAD, PT_GNU_RELRO and PT_TLS segments can contain \ + SHF_TLS sections. */ \ + ((((sec_hdr)->sh_flags & SHF_TLS) != 0) \ && ((segment)->p_type == PT_TLS \ || (segment)->p_type == PT_GNU_RELRO \ || (segment)->p_type == PT_LOAD)) \ + /* PT_TLS segment contains only SHF_TLS sections, PT_PHDR no \ + sections at all. */ \ || (((sec_hdr)->sh_flags & SHF_TLS) == 0 \ && (segment)->p_type != PT_TLS \ && (segment)->p_type != PT_PHDR)) \ - /* Any section besides one of type SHT_NOBITS must have a file \ - offset within the segment. */ \ + /* Any section besides one of type SHT_NOBITS must have file \ + offsets within the segment. */ \ && ((sec_hdr)->sh_type == SHT_NOBITS \ || ((bfd_vma) (sec_hdr)->sh_offset >= (segment)->p_offset \ - && ((sec_hdr)->sh_offset + ELF_SECTION_SIZE(sec_hdr, segment) \ - <= (segment)->p_offset + (segment)->p_filesz))) \ - /* SHF_ALLOC sections must have VMAs within the segment. Be \ - careful about segments right at the end of memory. */ \ + && (!(strict) \ + || ((sec_hdr)->sh_offset - (segment)->p_offset \ + <= (segment)->p_filesz - 1)) \ + && (((sec_hdr)->sh_offset - (segment)->p_offset \ + + ELF_SECTION_SIZE(sec_hdr, segment)) \ + <= (segment)->p_filesz))) \ + /* SHF_ALLOC sections must have VMAs within the segment. */ \ && (!(check_vma) \ || ((sec_hdr)->sh_flags & SHF_ALLOC) == 0 \ || ((sec_hdr)->sh_addr >= (segment)->p_vaddr \ - && ((sec_hdr)->sh_addr - (segment)->p_vaddr \ - + ELF_SECTION_SIZE(sec_hdr, segment) <= (segment)->p_memsz)))) + && (!(strict) \ + || ((sec_hdr)->sh_addr - (segment)->p_vaddr \ + <= (segment)->p_memsz - 1)) \ + && (((sec_hdr)->sh_addr - (segment)->p_vaddr \ + + ELF_SECTION_SIZE(sec_hdr, segment)) \ + <= (segment)->p_memsz)))) #define ELF_SECTION_IN_SEGMENT(sec_hdr, segment) \ - (ELF_SECTION_IN_SEGMENT_1 (sec_hdr, segment, 1)) + (ELF_SECTION_IN_SEGMENT_1 (sec_hdr, segment, 1, 0)) + +#define ELF_SECTION_IN_SEGMENT_STRICT(sec_hdr, segment) \ + (ELF_SECTION_IN_SEGMENT_1 (sec_hdr, segment, 1, 1)) #endif /* _ELF_INTERNAL_H */ |