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Correctly align bss.

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llvm-svn: 114556
This commit is contained in:
Rafael Espindola 2010-09-22 17:43:04 +00:00
parent cab700c79b
commit a2d73f0a38
2 changed files with 23 additions and 0 deletions
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6
lib/MC/MCELFStreamer.cpp
View File

@ -322,9 +322,15 @@ void MCELFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
SectionKind::getBSS());
MCSectionData &SectData = getAssembler().getOrCreateSectionData(*Section);
new MCAlignFragment(ByteAlignment, 0, 1, ByteAlignment, &SectData);
MCFragment *F = new MCFillFragment(0, 0, Size, &SectData);
SD.setFragment(F);
Symbol->setSection(*Section);
// Update the maximum alignment of the section if necessary.
if (ByteAlignment > SectData.getAlignment())
SectData.setAlignment(ByteAlignment);
} else {
SD.setCommon(Size, ByteAlignment);
}

17
test/MC/ELF/align-bss.s Normal file
View File

@ -0,0 +1,17 @@
// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - | elf-dump | FileCheck %s
// Test that the bss section is correctly aligned
.local foo
.comm foo,2048,16
// CHECK: ('sh_name', 13) # '.bss'
// CHECK-NEXT: ('sh_type', 8)
// CHECK-NEXT: ('sh_flags', 3)
// CHECK-NEXT: ('sh_addr', 0)
// CHECK-NEXT: ('sh_offset', 64)
// CHECK-NEXT: ('sh_size', 2048)
// CHECK-NEXT: ('sh_link', 0)
// CHECK-NEXT: ('sh_info', 0)
// CHECK-NEXT: ('sh_addralign', 16)
// CHECK-NEXT: ('sh_entsize', 0)