maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/lld/test/ELF/bss-start-common.s

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

18 lines
495 B
ArmAsm
Raw Normal View History

[ELF] - Define __bss_start symbol. GNU linkers define __bss_start symbol. Patch teaches LLD to do that. This is PR32051. Below is part of standart ld.bfd script: .data1 : { *(.data1) } _edata = .; PROVIDE (edata = .); . = .; __bss_start = .; .bss : { Currently LLD can emit up to 3 .bss* sections as one of testcase shows. Implementation inserts this symbol before first .bss* output section. Differential revision: https://reviews.llvm.org/D30419 llvm-svn: 299528
2017-04-05 18:03:25 +08:00
# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
# RUN: ld.lld %t -o %t2
[test] lld/test/: change llvm-objdump single-dash long options to double-dash options
2020-03-16 08:47:44 +08:00
# RUN: llvm-objdump -t --section-headers %t2 | FileCheck %s
[ELF] - Define __bss_start symbol. GNU linkers define __bss_start symbol. Patch teaches LLD to do that. This is PR32051. Below is part of standart ld.bfd script: .data1 : { *(.data1) } _edata = .; PROVIDE (edata = .); . = .; __bss_start = .; .bss : { Currently LLD can emit up to 3 .bss* sections as one of testcase shows. Implementation inserts this symbol before first .bss* output section. Differential revision: https://reviews.llvm.org/D30419 llvm-svn: 299528
2017-04-05 18:03:25 +08:00
[ELF][test] Simplify and reorganize tests Add file-level comments Delete insignificant addresses to make them more tolerant to layout changes Simplify test output Delete simple Inputs/*.s files Delete version-script-copy-rel.s - covered by verdef-defaultver.s Delete version-wildcard.test - covered by version-script-glob.s llvm-svn: 371213
2019-09-06 23:10:31 +08:00
## Test __bss_start is defined at the start of .bss
[ELF] - Define __bss_start symbol. GNU linkers define __bss_start symbol. Patch teaches LLD to do that. This is PR32051. Below is part of standart ld.bfd script: .data1 : { *(.data1) } _edata = .; PROVIDE (edata = .); . = .; __bss_start = .; .bss : { Currently LLD can emit up to 3 .bss* sections as one of testcase shows. Implementation inserts this symbol before first .bss* output section. Differential revision: https://reviews.llvm.org/D30419 llvm-svn: 299528
2017-04-05 18:03:25 +08:00
# CHECK: Sections:
[ELF][test] Simplify and reorganize tests Add file-level comments Delete insignificant addresses to make them more tolerant to layout changes Simplify test output Delete simple Inputs/*.s files Delete version-script-copy-rel.s - covered by verdef-defaultver.s Delete version-wildcard.test - covered by version-script-glob.s llvm-svn: 371213
2019-09-06 23:10:31 +08:00
# CHECK: Idx Name Size VMA Type
# CHECK: 2 .bss 00000004 [[ADDR:[0-za-f]+]] BSS
[ELF] - Define __bss_start symbol. GNU linkers define __bss_start symbol. Patch teaches LLD to do that. This is PR32051. Below is part of standart ld.bfd script: .data1 : { *(.data1) } _edata = .; PROVIDE (edata = .); . = .; __bss_start = .; .bss : { Currently LLD can emit up to 3 .bss* sections as one of testcase shows. Implementation inserts this symbol before first .bss* output section. Differential revision: https://reviews.llvm.org/D30419 llvm-svn: 299528
2017-04-05 18:03:25 +08:00
# CHECK: SYMBOL TABLE:
[llvm-objdump] --syms: make flags closer to GNU objdump This fixes several issues. The behavior changes are: A SHN_COMMON symbol does not have the 'g' flag. An undefined symbol does not have 'g' or 'l' flag. A STB_GLOBAL SymbolRef::ST_Unknown symbol has the 'g' flag. A STB_LOCAL SymbolRef::ST_Unknown symbol has the 'l' flag. Reviewed By: rupprecht Differential Revision: https://reviews.llvm.org/D75659
2020-03-05 09:19:18 +08:00
# CHECK: [[ADDR]] g .bss 0000000000000000 __bss_start
[ELF] - Define __bss_start symbol. GNU linkers define __bss_start symbol. Patch teaches LLD to do that. This is PR32051. Below is part of standart ld.bfd script: .data1 : { *(.data1) } _edata = .; PROVIDE (edata = .); . = .; __bss_start = .; .bss : { Currently LLD can emit up to 3 .bss* sections as one of testcase shows. Implementation inserts this symbol before first .bss* output section. Differential revision: https://reviews.llvm.org/D30419 llvm-svn: 299528
2017-04-05 18:03:25 +08:00
.global __bss_start
.text
_start:
.comm sym1,4,4