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[MC][Target] Implement support for R_X86_64_SIZE{32,64}.

Browse Source 
Differential Revision:	D7990
Reviewed by:	rafael, majnemer


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231216 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Davide Italiano 2015-03-04 06:49:39 +00:00
parent b9c28bc7f1
commit 8667ab752e
4 changed files with 22 additions and 0 deletions
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1
include/llvm/MC/MCExpr.h
View File

@ -188,6 +188,7 @@ public:
VK_GOTPAGE,
VK_GOTPAGEOFF,
VK_SECREL,
VK_SIZE, // symbol@SIZE
VK_WEAKREF, // The link between the symbols in .weakref foo, bar
VK_ARM_NONE,

2
lib/MC/MCExpr.cpp
View File

@ -192,6 +192,7 @@ StringRef MCSymbolRefExpr::getVariantKindName(VariantKind Kind) {
case VK_GOTPAGE: return "GOTPAGE";
case VK_GOTPAGEOFF: return "GOTPAGEOFF";
case VK_SECREL: return "SECREL32";
case VK_SIZE: return "SIZE";
case VK_WEAKREF: return "WEAKREF";
case VK_ARM_NONE: return "none";
case VK_ARM_TARGET1: return "target1";
@ -311,6 +312,7 @@ MCSymbolRefExpr::getVariantKindForName(StringRef Name) {
.Case("gotpageoff", VK_GOTPAGEOFF)
.Case("imgrel", VK_COFF_IMGREL32)
.Case("secrel32", VK_SECREL)
.Case("size", VK_SIZE)
.Case("l", VK_PPC_LO)
.Case("h", VK_PPC_HI)
.Case("ha", VK_PPC_HA)

6
lib/Target/X86/MCTargetDesc/X86ELFObjectWriter.cpp
View File

@ -123,6 +123,9 @@ unsigned X86ELFObjectWriter::GetRelocType(const MCValue &Target,
case MCSymbolRefExpr::VK_DTPOFF:
Type = ELF::R_X86_64_DTPOFF64;
break;
case MCSymbolRefExpr::VK_SIZE:
Type = ELF::R_X86_64_SIZE64;
break;
}
break;
case X86::reloc_signed_4byte:
@ -144,6 +147,9 @@ unsigned X86ELFObjectWriter::GetRelocType(const MCValue &Target,
case MCSymbolRefExpr::VK_DTPOFF:
Type = ELF::R_X86_64_DTPOFF32;
break;
case MCSymbolRefExpr::VK_SIZE:
Type = ELF::R_X86_64_SIZE32;
break;
}
break;
case FK_Data_4:

13
test/MC/ELF/relocation.s
View File

@ -34,6 +34,13 @@ bar:
movl $_GLOBAL_OFFSET_TABLE_, %eax
movabs $_GLOBAL_OFFSET_TABLE_, %rax
.quad blah@SIZE # R_X86_64_SIZE64
.quad blah@SIZE + 32 # R_X86_64_SIZE64
.quad blah@SIZE - 32 # R_X86_64_SIZE64
movl blah@SIZE, %eax # R_X86_64_SIZE32
movl blah@SIZE + 32, %eax # R_X86_64_SIZE32
movl blah@SIZE - 32, %eax # R_X86_64_SIZE32
// CHECK: Section {
// CHECK: Name: .rela.text
// CHECK: Relocations [
@ -62,6 +69,12 @@ bar:
// CHECK-NEXT: 0x98 R_X86_64_PC32 foo 0xFFFFFFFFFFFFFFFB
// CHECK-NEXT: 0x9D R_X86_64_GOTPC32 _GLOBAL_OFFSET_TABLE_ 0x1
// CHECK-NEXT: 0xA3 R_X86_64_GOTPC64 _GLOBAL_OFFSET_TABLE_ 0x2
// CHECK-NEXT: 0xAB R_X86_64_SIZE64 blah 0x0
// CHECK-NEXT: 0xB3 R_X86_64_SIZE64 blah 0x20
// CHECK-NEXT: 0xBB R_X86_64_SIZE64 blah 0xFFFFFFFFFFFFFFE0
// CHECK-NEXT: 0xC6 R_X86_64_SIZE32 blah 0x0
// CHECK-NEXT: 0xCD R_X86_64_SIZE32 blah 0x20
// CHECK-NEXT: 0xD4 R_X86_64_SIZE32 blah 0xFFFFFFFFFFFFFFE0
// CHECK-NEXT: ]
// CHECK-NEXT: }