Nick Clifton
e922d1eaa3
Add ability to change linker warning messages into errors when reporting executable stacks and/or executable segments.
...
include
* bfdlink.h (struct bfd_link_info): Update descriptions of the 'execstack', 'noexecstack' and 'warn_execstack' fields. Add 'error_exectack' and 'warn_is_error_for_rwx_segments' fields.
bfd
* elf.c (assign_file_positions_except_relocs): Turn warnings about executable segments into errors if so requested.
* elflink.c (bfd_elf_size_dynamic_sections): Turn warnings about executable stacks into errors if so requested.
ld
* ldlex.h (enum option_values): Add OPTION_ERROR_EXECSTACK, OPTION_NO_ERROR_EXECSTACK, OPTION_WARN_EXECSTACK_OBJECTS, OPTION_ERROR_RWX_SEGMENTS and OPTION_NO_ERROR_RWX_SEGMENTS. (struct ld_option): Add new long options. (parse_args): Parse new long options. (elf_static_list_options): Display the new options.
* ld.texi: Document the new command line options.
* configure.ac (error-execstack): New configuration option. (error-rwx-segments): New configuration option.
* emultempl/elf.em (_before_parse): Initialse the new linkinfo fields.
* NEWS: Mention the new features.
* config.in: Regenerate.
* configure: Regenerate.
* testsuite/ld-elf/commonpage2.d: Disable errors for RWX segments and/or executable stacks.
* testsuite/ld-elf/elf.exp: Likewise.
* testsuite/ld-elf/header.d: Likewise.
* testsuite/ld-elf/loadaddr1.d: Likewise.
* testsuite/ld-elf/loadaddr2.d: Likewise.
* testsuite/ld-elf/maxpage4.d: Likewise.
* testsuite/ld-elf/nobits-1.d: Likewise.
* testsuite/ld-elf/note-1.d: Likewise.
* testsuite/ld-elf/orphan-10.d: Likewise.
* testsuite/ld-elf/orphan-11.d: Likewise.
* testsuite/ld-elf/orphan-12.d: Likewise.
* testsuite/ld-elf/orphan-5.d: Likewise.
* testsuite/ld-elf/orphan-7.d: Likewise.
* testsuite/ld-elf/orphan-8.d: Likewise.
* testsuite/ld-elf/orphan-9.d: Likewise.
* testsuite/ld-elf/orphan-region.d: Likewise.
* testsuite/ld-elf/orphan.d: Likewise.
* testsuite/ld-elf/pr19539.d: Likewise.
* testsuite/ld-elf/pr26256-1a.d: Likewise.
* testsuite/ld-elf/pr26907.d: Likewise.
* testsuite/ld-elf/pr28597.d: Likewise.
* testsuite/ld-elf/retain2.d: Likewise.
* testsuite/ld-elf/shared.exp: Likewise.
* testsuite/ld-elf/size-1.d: Likewise.
* testsuite/ld-elf/textaddr7.d: Likewise.
* testsuite/ld-elf/warn1.d: Likewise.
* testsuite/ld-elf/warn2.d: Likewise.
* testsuite/ld-i386/discarded1.d: Likewise.
* testsuite/ld-i386/pr19175.d: Likewise.
* testsuite/ld-i386/pr19539.d: Likewise.
* testsuite/ld-i386/pr23189.d: Likewise.
* testsuite/ld-plugin/lto-3r.d: Likewise.
* testsuite/ld-plugin/lto-5r.d: Likewise.
* testsuite/ld-plugin/lto.exp: Likewise.
* testsuite/ld-powerpc/ppc476-shared.d: Likewise.
* testsuite/ld-powerpc/ppc476-shared2.d: Likewise.
* testsuite/ld-powerpc/pr28827-2.d: Likewise.
* testsuite/ld-s390/s390.exp: Likewise.
* testsuite/ld-scripts/align2a.d: Likewise.
* testsuite/ld-scripts/align2b.d: Likewise.
* testsuite/ld-scripts/align5.d: Likewise.
* testsuite/ld-scripts/alignof.exp: Likewise.
* testsuite/ld-scripts/crossref.exp: Likewise.
* testsuite/ld-scripts/defined2.d: Likewise.
* testsuite/ld-scripts/defined3.d: Likewise.
* testsuite/ld-scripts/defined5.d: Likewise.
* testsuite/ld-scripts/pr14962.d: Likewise.
* testsuite/ld-scripts/pr18963.d: Likewise.
* testsuite/ld-scripts/pr20302.d: Likewise.
* testsuite/ld-scripts/print-memory-usage.exp: Likewise.
* testsuite/ld-scripts/rgn-at1.d: Likewise.
* testsuite/ld-scripts/rgn-at10.d: Likewise.
* testsuite/ld-scripts/rgn-at4.d: Likewise.
* testsuite/ld-scripts/rgn-at6.d: Likewise.
* testsuite/ld-scripts/rgn-at8.d: Likewise.
* testsuite/ld-scripts/rgn-at9.d: Likewise.
* testsuite/ld-scripts/rgn-over1.d: Likewise.
* testsuite/ld-scripts/rgn-over2.d: Likewise.
* testsuite/ld-scripts/rgn-over4.d: Likewise.
* testsuite/ld-scripts/rgn-over5.d: Likewise.
* testsuite/ld-scripts/rgn-over6.d: Likewise.
* testsuite/ld-scripts/script.exp: Likewise.
* testsuite/ld-scripts/sizeof.exp: Likewise.
* testsuite/ld-scripts/sort-file.d: Likewise.
* testsuite/ld-x86-64/discarded1.d: Likewise.
* testsuite/ld-x86-64/pr19175.d: Likewise.
* testsuite/ld-x86-64/pr19539a.d: Likewise.
* testsuite/ld-x86-64/pr19539b.d: Likewise.
* testsuite/ld-x86-64/pr23189.d: Likewise.
2023-11-10 11:37:27 +00:00
Alan Modra
8d748d1dc5
PR26907, segment contains empty SHT_NOBITS section
...
Section ordering is important for _bfd_elf_map_sections_to_segments
and assign_file_positions_for_load_sections, which are only prepared
to handle sections in increasing LMA order. When zero size sections
are involved it is possible to have multiple sections at the same LMA.
In that case the zero size sections must sort before any non-zero size
sections regardless of their types.
bfd/
PR 26907
* elf.c (elf_sort_sections): Don't sort zero size !load sections
after load sections.
ld/
* testsuite/ld-elf/pr26907.ld,
* testsuite/ld-elf/pr26907.s,
* testsuite/ld-elf/pr26907.d: New test.
2020-11-28 18:31:32 +10:30
