commit e6c5d3862d123f84bf400078172fd93680e15c5b
author George Rimar <grimar@accesssoftek.com> Wed Apr 05 10:03:25 2017 +0000
committer George Rimar <grimar@accesssoftek.com> Wed Apr 05 10:03:25 2017 +0000
tree f2e76b773c454453479b656c8d5c6c22fd547df7
parent d5be88ecf8bf0032794101bcad3ee9a2a01dfe5a

[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

lld/ELF/Symbols.cpp

diff --git a/lld/ELF/Symbols.cpp b/lld/ELF/Symbols.cpp
index ee0db43..7c939de 100644
--- a/lld/ELF/Symbols.cpp
+++ b/lld/ELF/Symbols.cpp
@@ -28,6 +28,7 @@
 using namespace lld;
 using namespace lld::elf;
 
+DefinedRegular *ElfSym::Bss;
 DefinedRegular *ElfSym::Etext;
 DefinedRegular *ElfSym::Etext2;
 DefinedRegular *ElfSym::Edata;