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authorAlan Modra <amodra@gmail.com>2010-07-20 14:08:32 +0000
committerAlan Modra <amodra@gmail.com>2010-07-20 14:08:32 +0000
commitf4638467331c33e2f9dd00c12c175a9eb47351c8 (patch)
tree98a865621bcd4a31314c5de6d5e7780feff3d365 /include/elf
parentad34eb2f7c3120f83d22cf2d5371673fc95040b4 (diff)
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include/elf/
* internal.h (ELF_TBSS_SPECIAL): New macro, extracted from.. (ELF_SECTION_SIZE): ..here. (ELF_SECTION_IN_SEGMENT_1): Add "strict" arg. (ELF_SECTION_IN_SEGMENT_STRICT): New macro. bfd/ * elf.c (assign_file_positions_for_load_sections): Check that zero size sections are allocated in segments too. (assign_file_positions_for_non_load_sections): Warn if zero size alloc sections are found here. (copy_elf_program_header): Don't drop zero size sections from segment map. (copy_private_bfd_data): Check for changes in zero size sections. binutils/ * readelf.c (process_program_headers): Don't ignore all zero size sections. ld/testsuite/ * ld-powerpc/tlsexe.r: Update. * ld-powerpc/tlsexetoc.r: Update. * ld-powerpc/tlsso.r: Update. * ld-powerpc/tlstocso.r: Update.
Diffstat (limited to 'include/elf')
-rw-r--r--include/elf/ChangeLog7
-rw-r--r--include/elf/internal.h54
2 files changed, 43 insertions, 18 deletions
diff --git a/include/elf/ChangeLog b/include/elf/ChangeLog
index 8a8e118..edd9b48 100644
--- a/include/elf/ChangeLog
+++ b/include/elf/ChangeLog
@@ -1,3 +1,10 @@
+2010-07-20 Alan Modra <amodra@gmail.com>
+
+ * internal.h (ELF_TBSS_SPECIAL): New macro, extracted from..
+ (ELF_SECTION_SIZE): ..here.
+ (ELF_SECTION_IN_SEGMENT_1): Add "strict" arg.
+ (ELF_SECTION_IN_SEGMENT_STRICT): New macro.
+
2010-06-25 Alan Modra <amodra@gmail.com>
* ppc64.h (R_PPC64_LO_DS_OPT): Define.
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 */