[llvm] r298302 - [Fuchsia] Use %gs for ABI slots under -mcmodel=kernel

[Evgeniy Stepanov via llvm-commits]

Author: eugenis
Date: Mon Mar 20 15:35:37 2017
New Revision: 298302

URL: http://llvm.org/viewvc/llvm-project?rev=298302&view=rev
Log:
[Fuchsia] Use %gs for ABI slots under -mcmodel=kernel

Make x86_64-fuchsia targets under -mcmodel=kernel use %gs rather
than %fs to access ABI slots for stack-protector and safe-stack

Patch by Roland McGrath.

Differential Revision: https://reviews.llvm.org/D30870

Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=298302&r1=298301&r2=298302&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Mon Mar 20 15:35:37 2017
@@ -2077,7 +2077,7 @@ Value *X86TargetLowering::getIRStackGuar
   if (hasStackGuardSlotTLS(Subtarget.getTargetTriple())) {
     if (Subtarget.isTargetFuchsia()) {
       // <magenta/tls.h> defines MX_TLS_STACK_GUARD_OFFSET with this value.
-      return SegmentOffset(IRB, 0x10, 257);
+      return SegmentOffset(IRB, 0x10, getAddressSpace());
     } else {
       // %fs:0x28, unless we're using a Kernel code model, in which case
       // it's %gs:0x28.  gs:0x14 on i386.
@@ -2142,7 +2142,7 @@ Value *X86TargetLowering::getSafeStackPo
   // Fuchsia is similar.
   if (Subtarget.isTargetFuchsia()) {
     // <magenta/tls.h> defines MX_TLS_UNSAFE_SP_OFFSET with this value.
-    return SegmentOffset(IRB, 0x18, 257);
+    return SegmentOffset(IRB, 0x18, getAddressSpace());
   }
 
   return TargetLowering::getSafeStackPointerLocation(IRB);