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Symbols defined as the difference of other two end up in the ABS section.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117451 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2010-10-27 16:04:30 +00:00
parent 8818213247
commit bf052ac5d1
2 changed files with 18 additions and 5 deletions
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7
lib/MC/ELFObjectWriter.cpp
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@ -863,7 +863,7 @@ void ELFObjectWriterImpl::ComputeSymbolTable(MCAssembler &Asm) {
if (it->isCommon()) {
assert(!Local);
MSD.SectionIndex = ELF::SHN_COMMON;
} else if (Symbol.isAbsolute()) {
} else if (Symbol.isAbsolute() || RefSymbol.isVariable()) {
MSD.SectionIndex = ELF::SHN_ABS;
} else if (RefSymbol.isUndefined()) {
MSD.SectionIndex = ELF::SHN_UNDEF;
@ -871,11 +871,8 @@ void ELFObjectWriterImpl::ComputeSymbolTable(MCAssembler &Asm) {
// are able to set it.
if (GetBinding(*it) == ELF::STB_LOCAL)
SetBinding(*it, ELF::STB_GLOBAL);
} else if (Symbol.isVariable()) {
MSD.SectionIndex = SectionIndexMap.lookup(&RefSymbol.getSection());
assert(MSD.SectionIndex && "Invalid section index!");
} else {
MSD.SectionIndex = SectionIndexMap.lookup(&Symbol.getSection());
MSD.SectionIndex = SectionIndexMap.lookup(&RefSymbol.getSection());
assert(MSD.SectionIndex && "Invalid section index!");
}

16
test/MC/ELF/abs.s Normal file
View File

@ -0,0 +1,16 @@
// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - | elf-dump | FileCheck %s
// Test that zed will be an ABS symbol
.Lfoo:
.Lbar:
zed = .Lfoo - .Lbar
// CHECK: # Symbol 0x00000001
// CHECK-NEXT: (('st_name', 0x00000001) # 'zed'
// CHECK-NEXT: ('st_bind', 0x00000000)
// CHECK-NEXT: ('st_type', 0x00000000)
// CHECK-NEXT: ('st_other', 0x00000000)
// CHECK-NEXT: ('st_shndx', 0x0000fff1)
// CHECK-NEXT: ('st_value', 0x00000000)
// CHECK-NEXT: ('st_size', 0x00000000)