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Emit global ctors into .CRT$XCU instead of .ctors on Win32. Patch by Joe Groff!

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llvm-svn: 151289
This commit is contained in:
Michael J. Spencer 2012-02-23 21:56:08 +00:00
parent 403f29c9c4
commit ba986d585c
2 changed files with 44 additions and 6 deletions
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22
lib/MC/MCObjectFileInfo.cpp
View File

@ -409,12 +409,22 @@ void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
COFF::IMAGE_SCN_MEM_READ,
SectionKind::getReadOnly());
StaticCtorSection =
Ctx->getCOFFSection(".ctors",
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
COFF::IMAGE_SCN_MEM_READ |
COFF::IMAGE_SCN_MEM_WRITE,
SectionKind::getDataRel());
if (T.getOS() == Triple::Win32) {
StaticCtorSection =
Ctx->getCOFFSection(".CRT$XCU",
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
COFF::IMAGE_SCN_MEM_READ,
SectionKind::getReadOnly());
} else {
StaticCtorSection =
Ctx->getCOFFSection(".ctors",
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
COFF::IMAGE_SCN_MEM_READ |
COFF::IMAGE_SCN_MEM_WRITE,
SectionKind::getDataRel());
}
StaticDtorSection =
Ctx->getCOFFSection(".dtors",
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

28
test/MC/COFF/global_ctors.ll Normal file
View File

@ -0,0 +1,28 @@
; Test that global ctors are emitted into the proper COFF section for the
; target. Mingw uses .ctors, whereas MSVC uses .CRT$XC*.
; RUN: llc < %s -mtriple i686-pc-win32 | FileCheck %s --check-prefix WIN32
; RUN: llc < %s -mtriple x86_64-pc-win32 | FileCheck %s --check-prefix WIN32
; RUN: llc < %s -mtriple i686-pc-mingw32 | FileCheck %s --check-prefix MINGW32
; RUN: llc < %s -mtriple x86_64-pc-mingw32 | FileCheck %s --check-prefix MINGW32
@.str = private unnamed_addr constant [13 x i8] c"constructing\00", align 1
@.str2 = private unnamed_addr constant [5 x i8] c"main\00", align 1
@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @a_global_ctor }]
declare i32 @puts(i8*)
define void @a_global_ctor() nounwind {
%1 = call i32 @puts(i8* getelementptr inbounds ([13 x i8]* @.str, i32 0, i32 0))
ret void
}
define i32 @main() nounwind {
%1 = call i32 @puts(i8* getelementptr inbounds ([5 x i8]* @.str2, i32 0, i32 0))
ret i32 0
}
; WIN32: .section .CRT$XCU,"r"
; WIN32: a_global_ctor
; MINGW32: .section .ctors,"w"
; MINGW32: a_global_ctor