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[MC] support TLSDESC and TLSCALL / GNU2 tls dialect 

Differential Revision:  http://reviews.llvm.org/D18885

llvm-svn: 265881
This commit is contained in:
Davide Italiano 2016-04-09 20:32:33 +00:00
parent 128b8e92c0
commit 7aa47094b2
2 changed files with 30 additions and 0 deletions
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4
llvm/lib/Target/X86/MCTargetDesc/X86ELFObjectWriter.cpp
View File

@ -154,6 +154,10 @@ static unsigned getRelocType64(MCContext &Ctx, SMLoc Loc,
case RT64_8: case RT64_8:
llvm_unreachable("Unimplemented"); llvm_unreachable("Unimplemented");
} }
case MCSymbolRefExpr::VK_TLSCALL:
return ELF::R_X86_64_TLSDESC_CALL;
case MCSymbolRefExpr::VK_TLSDESC:
return ELF::R_X86_64_GOTPC32_TLSDESC;
case MCSymbolRefExpr::VK_TLSGD: case MCSymbolRefExpr::VK_TLSGD:
checkIs32(Ctx, Loc, Type); checkIs32(Ctx, Loc, Type);
return ELF::R_X86_64_TLSGD; return ELF::R_X86_64_TLSGD;

26
llvm/test/MC/ELF/relocation-tls.s Normal file
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@ -0,0 +1,26 @@
// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - | llvm-readobj -s -sr | FileCheck %s
// Test that we produce the correct relocation.
leaq _ZL3ccc@TLSDESC(%rip), %rax
call *_ZL3ccc@TLSCALL(%rax)
addq %fs:0, %rax
// CHECK: Section {
// CHECK: Index:
// CHECK: Name: .rela.text
// CHECK-NEXT: Type: SHT_RELA
// CHECK-NEXT: Flags [
// CHECK-NEXT: ]
// CHECK-NEXT: Address: 0x0
// CHECK-NEXT: Offset:
// CHECK-NEXT: Size:
// CHECK-NEXT: Link:
// CHECK-NEXT: Info:
// CHECK-NEXT: AddressAlignment: 8
// CHECK-NEXT: EntrySize: 24
// CHECK-NEXT: Relocations [
// CHECK-NEXT: 0x3 R_X86_64_GOTPC32_TLSDESC _ZL3ccc 0xFFFFFFFFFFFFFFFC
// CHECK-NEXT: 0x9 R_X86_64_TLSDESC_CALL _ZL3ccc 0x0
// CHECK-NEXT: ]
// CHECK-NEXT: }