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[Bug gas/25380] Support section linkage 'unique' (multiple sections with
From: |
cvs-commit at gcc dot gnu.org |
Subject: |
[Bug gas/25380] Support section linkage 'unique' (multiple sections with the same name) |
Date: |
Mon, 03 Feb 2020 01:09:08 +0000 |
https://sourceware.org/bugzilla/show_bug.cgi?id=25380
--- Comment #7 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot
gnu.org> ---
The master branch has been updated by H.J. Lu <address@hidden>:
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=a8c4d40b578378be3b12575d127d4c7bd9972f32
commit a8c4d40b578378be3b12575d127d4c7bd9972f32
Author: H.J. Lu <address@hidden>
Date: Sun Feb 2 17:07:51 2020 -0800
ELF: Add support for unique section ID to assembler
Clang's integrated assembler supports multiple section with the same
name:
.section .text,"ax",@progbits,unique,1
nop
.section .text,"ax",@progbits,unique,2
nop
"unique,N" assigns the number, N, as the section ID, to a section. The
valid values of the section ID are between 0 and 4294967295. It can be
used to distinguish different sections with the same section name.
This is useful with -fno-unique-section-names -ffunction-sections.
-ffunction-sections by default generates .text.foo, .text.bar, etc.
Using the same string can save lots of space in .strtab.
This patch adds section_id to bfd_section and reuses the linker
internal bit in BFD section flags, SEC_LINKER_CREATED, for assmebler
internal use to mark valid section_id. It also updates objdump to
compare section pointers if 2 sections comes from the same file since
2 different sections can have the same section name.
bfd/
PR gas/25380
* bfd-in2.h: Regenerated.
* ecoff.c (bfd_debug_section): Add section_id.
* section.c (bfd_section): Add section_id.
(SEC_ASSEMBLER_SECTION_ID): New.
(BFD_FAKE_SECTION): Add section_id.
binutils/
PR gas/25380
* objdump.c (sym_ok): Return FALSE if 2 sections are in the
same file with different section pointers.
gas/
PR gas/25380
* config/obj-elf.c (section_match): Removed.
(get_section): Also match SEC_ASSEMBLER_SECTION_ID and
section_id.
(obj_elf_change_section): Replace info and group_name arguments
with match_p. Also update the section ID and flags from match_p.
(obj_elf_section): Handle "unique,N". Update call to
obj_elf_change_section.
* config/obj-elf.h (elf_section_match): New.
(obj_elf_change_section): Updated.
* config/tc-arm.c (start_unwind_section): Update call to
obj_elf_change_section.
* config/tc-ia64.c (obj_elf_vms_common): Likewise.
* config/tc-microblaze.c (microblaze_s_data): Likewise.
(microblaze_s_sdata): Likewise.
(microblaze_s_rdata): Likewise.
(microblaze_s_bss): Likewise.
* config/tc-mips.c (s_change_section): Likewise.
* config/tc-msp430.c (msp430_profiler): Likewise.
* config/tc-rx.c (parse_rx_section): Likewise.
* config/tc-tic6x.c (tic6x_start_unwind_section): Likewise.
* doc/as.texi: Document "unique,N" in .section directive.
* testsuite/gas/elf/elf.exp: Run "unique,N" tests.
* testsuite/gas/elf/section15.d: New file.
* testsuite/gas/elf/section15.s: Likewise.
* testsuite/gas/elf/section16.s: Likewise.
* testsuite/gas/elf/section16a.d: Likewise.
* testsuite/gas/elf/section16b.d: Likewise.
* testsuite/gas/elf/section17.d: Likewise.
* testsuite/gas/elf/section17.l: Likewise.
* testsuite/gas/elf/section17.s: Likewise.
* testsuite/gas/i386/unique.d: Likewise.
* testsuite/gas/i386/unique.s: Likewise.
* testsuite/gas/i386/x86-64-unique.d: Likewise.
* testsuite/gas/i386/i386.exp: Run unique and x86-64-unique.
ld/
PR gas/25380
* testsuite/ld-i386/pr22001-1c.S: Use "unique,N" in .section
directives.
* testsuite/ld-i386/tls-gd1.S: Likewise.
* testsuite/ld-x86-64/pr21481b.S: Likewise.
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- [Bug gas/25380] Support section linkage 'unique' (multiple sections with the same name), hjl.tools at gmail dot com, 2020/02/01
- [Bug gas/25380] Support section linkage 'unique' (multiple sections with the same name), hjl.tools at gmail dot com, 2020/02/01
- [Bug gas/25380] Support section linkage 'unique' (multiple sections with the same name), hjl.tools at gmail dot com, 2020/02/01
- [Bug gas/25380] Support section linkage 'unique' (multiple sections with the same name), hjl.tools at gmail dot com, 2020/02/01
- [Bug gas/25380] Support section linkage 'unique' (multiple sections with the same name), hjl.tools at gmail dot com, 2020/02/01
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- [Bug gas/25380] Support section linkage 'unique' (multiple sections with the same name), hjl.tools at gmail dot com, 2020/02/02
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- [Bug gas/25380] Support section linkage 'unique' (multiple sections with the same name), hjl.tools at gmail dot com, 2020/02/02
- [Bug gas/25380] Support section linkage 'unique' (multiple sections with the same name),
cvs-commit at gcc dot gnu.org <=
- [Bug gas/25380] Support section linkage 'unique' (multiple sections with the same name), hjl.tools at gmail dot com, 2020/02/04