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Support segmented stacks on Win64

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Identical to Win32 method except the GS segment register is used for TLS
instead of FS and pvArbitrary is at TEB offset 0x28 instead of 0x14.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205342 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner 2014-04-01 18:34:21 +00:00
parent a173c01556
commit f319a2c3b3
2 changed files with 59 additions and 5 deletions
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7
lib/Target/X86/X86FrameLowering.cpp
View File

@ -1167,7 +1167,7 @@ X86FrameLowering::adjustForSegmentedStacks(MachineFunction &MF) const {
if (MF.getFunction()->isVarArg())
report_fatal_error("Segmented stacks do not support vararg functions.");
if (!STI.isTargetLinux() && !STI.isTargetDarwin() &&
!STI.isTargetWin32() && !STI.isTargetFreeBSD())
!STI.isTargetWin32() && !STI.isTargetWin64() && !STI.isTargetFreeBSD())
report_fatal_error("Segmented stacks not supported on this platform.");
MachineBasicBlock *allocMBB = MF.CreateMachineBasicBlock();
@ -1211,6 +1211,9 @@ X86FrameLowering::adjustForSegmentedStacks(MachineFunction &MF) const {
} else if (STI.isTargetDarwin()) {
TlsReg = X86::GS;
TlsOffset = 0x60 + 90*8; // See pthread_machdep.h. Steal TLS slot 90.
} else if (STI.isTargetWin64()) {
TlsReg = X86::GS;
TlsOffset = 0x28; // pvArbitrary, reserved for application use
} else if (STI.isTargetFreeBSD()) {
TlsReg = X86::FS;
TlsOffset = 0x18;
@ -1248,7 +1251,7 @@ X86FrameLowering::adjustForSegmentedStacks(MachineFunction &MF) const {
BuildMI(checkMBB, DL, TII.get(X86::LEA32r), ScratchReg).addReg(X86::ESP)
.addImm(1).addReg(0).addImm(-StackSize).addReg(0);
if (STI.isTargetLinux() || STI.isTargetWin32()) {
if (STI.isTargetLinux() || STI.isTargetWin32() || STI.isTargetWin64()) {
BuildMI(checkMBB, DL, TII.get(X86::CMP32rm)).addReg(ScratchReg)
.addReg(0).addImm(0).addReg(0).addImm(TlsOffset).addReg(TlsReg);
} else if (STI.isTargetDarwin()) {

57
test/CodeGen/X86/segmented-stacks.ll
View File

@ -4,6 +4,7 @@
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-darwin -segmented-stacks -verify-machineinstrs | FileCheck %s -check-prefix=X64-Darwin
; RUN: llc < %s -mcpu=generic -mtriple=i686-mingw32 -segmented-stacks -verify-machineinstrs | FileCheck %s -check-prefix=X32-MinGW
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-freebsd -segmented-stacks -verify-machineinstrs | FileCheck %s -check-prefix=X64-FreeBSD
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-mingw32 -segmented-stacks -verify-machineinstrs | FileCheck %s -check-prefix=X64-MinGW
; We used to crash with filetype=obj
; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -segmented-stacks -filetype=obj
@ -12,16 +13,14 @@
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-darwin -segmented-stacks -filetype=obj
; RUN: llc < %s -mcpu=generic -mtriple=i686-mingw32 -segmented-stacks -filetype=obj
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-freebsd -segmented-stacks -filetype=obj
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-mingw32 -segmented-stacks -filetype=obj
; RUN: not llc < %s -mcpu=generic -mtriple=x86_64-solaris -segmented-stacks 2> %t.log
; RUN: FileCheck %s -input-file=%t.log -check-prefix=X64-Solaris
; RUN: not llc < %s -mcpu=generic -mtriple=x86_64-mingw32 -segmented-stacks 2> %t.log
; RUN: FileCheck %s -input-file=%t.log -check-prefix=X64-MinGW
; RUN: not llc < %s -mcpu=generic -mtriple=i686-freebsd -segmented-stacks 2> %t.log
; RUN: FileCheck %s -input-file=%t.log -check-prefix=X32-FreeBSD
; X64-Solaris: Segmented stacks not supported on this platform
; X64-MinGW: Segmented stacks not supported on this platform
; X32-FreeBSD: Segmented stacks not supported on FreeBSD i386
; Just to prevent the alloca from being optimized away
@ -83,6 +82,16 @@ define void @test_basic() {
; X32-MinGW-NEXT: calll ___morestack
; X32-MinGW-NEXT: ret
; X64-MinGW-LABEL: test_basic:
; X64-MinGW: cmpq %gs:40, %rsp
; X64-MinGW-NEXT: ja .LBB0_2
; X64-MinGW: movabsq $72, %r10
; X64-MinGW-NEXT: movabsq $32, %r11
; X64-MinGW-NEXT: callq __morestack
; X64-MinGW-NEXT: retq
; X64-FreeBSD-LABEL: test_basic:
; X64-FreeBSD: cmpq %fs:24, %rsp
@ -145,6 +154,17 @@ define i32 @test_nested(i32 * nest %closure, i32 %other) {
; X32-MinGW-NEXT: calll ___morestack
; X32-MinGW-NEXT: ret
; X64-MinGW-LABEL: test_nested:
; X64-MinGW: cmpq %gs:40, %rsp
; X64-MinGW-NEXT: ja .LBB1_2
; X64-MinGW: movq %r10, %rax
; X64-MinGW-NEXT: movabsq $0, %r10
; X64-MinGW-NEXT: movabsq $32, %r11
; X64-MinGW-NEXT: callq __morestack
; X64-MinGW-NEXT: retq
; X64-MinGW-NEXT: movq %rax, %r10
; X64-FreeBSD: cmpq %fs:24, %rsp
; X64-FreeBSD-NEXT: ja .LBB1_2
@ -208,6 +228,16 @@ define void @test_large() {
; X32-MinGW-NEXT: calll ___morestack
; X32-MinGW-NEXT: ret
; X64-MinGW-LABEL: test_large:
; X64-MinGW: leaq -40040(%rsp), %r11
; X64-MinGW-NEXT: cmpq %gs:40, %r11
; X64-MinGW-NEXT: ja .LBB2_2
; X64-MinGW: movabsq $40040, %r10
; X64-MinGW-NEXT: movabsq $32, %r11
; X64-MinGW-NEXT: callq __morestack
; X64-MinGW-NEXT: retq
; X64-FreeBSD: leaq -40008(%rsp), %r11
; X64-FreeBSD-NEXT: cmpq %fs:24, %r11
; X64-FreeBSD-NEXT: ja .LBB2_2
@ -275,6 +305,16 @@ define fastcc void @test_fastcc() {
; X32-MinGW-NEXT: calll ___morestack
; X32-MinGW-NEXT: ret
; X64-MinGW-LABEL: test_fastcc:
; X64-MinGW: cmpq %gs:40, %rsp
; X64-MinGW-NEXT: ja .LBB3_2
; X64-MinGW: movabsq $72, %r10
; X64-MinGW-NEXT: movabsq $32, %r11
; X64-MinGW-NEXT: callq __morestack
; X64-MinGW-NEXT: retq
; X64-FreeBSD-LABEL: test_fastcc:
; X64-FreeBSD: cmpq %fs:24, %rsp
@ -348,6 +388,17 @@ define fastcc void @test_fastcc_large() {
; X32-MinGW-NEXT: calll ___morestack
; X32-MinGW-NEXT: ret
; X64-MinGW-LABEL: test_fastcc_large:
; X64-MinGW: leaq -40040(%rsp), %r11
; X64-MinGW-NEXT: cmpq %gs:40, %r11
; X64-MinGW-NEXT: ja .LBB4_2
; X64-MinGW: movabsq $40040, %r10
; X64-MinGW-NEXT: movabsq $32, %r11
; X64-MinGW-NEXT: callq __morestack
; X64-MinGW-NEXT: retq
; X64-FreeBSD-LABEL: test_fastcc_large:
; X64-FreeBSD: leaq -40008(%rsp), %r11