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author | Jack Carter <jcarter@mips.com> | 2012-08-06 21:26:03 +0000 |
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committer | Jack Carter <jcarter@mips.com> | 2012-08-06 21:26:03 +0000 |
commit | fc54d9e47a1276650f14f38e7d037c9b58c8dc2d (patch) | |
tree | bbf0805bc17a035e6d50d6ecce00c63bc07fed7e /lib/Target/Mips | |
parent | f45717e985260e9416dbd2fe8df471d48705c86a (diff) | |
download | external_llvm-fc54d9e47a1276650f14f38e7d037c9b58c8dc2d.zip external_llvm-fc54d9e47a1276650f14f38e7d037c9b58c8dc2d.tar.gz external_llvm-fc54d9e47a1276650f14f38e7d037c9b58c8dc2d.tar.bz2 |
Mips relocations R_MIPS_HIGHER and R_MIPS_HIGHEST.
These 2 relocations gain access to the
highest and the second highest 16 bits
of a 64 bit object.
R_MIPS_HIGHER %higher(A+S)
The %higher(x) function is [ (((long long) x + 0x80008000LL) >> 32) & 0xffff ].
R_MIPS_HIGHEST %highest(A+S)
The %highest(x) function is [ (((long long) x + 0x800080008000LL) >> 48) & 0xffff ].
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161348 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/Mips')
4 files changed, 30 insertions, 2 deletions
diff --git a/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp b/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp index 6fe0c11..f679b6f 100644 --- a/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp +++ b/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp @@ -59,9 +59,17 @@ static unsigned adjustFixupValue(unsigned Kind, uint64_t Value) { break; case Mips::fixup_Mips_HI16: case Mips::fixup_Mips_GOT_Local: - // Get the higher 16-bits. Also add 1 if bit 15 is 1. + // Get the 2nd 16-bits. Also add 1 if bit 15 is 1. Value = ((Value + 0x8000) >> 16) & 0xffff; break; + case Mips::fixup_Mips_HIGHER: + // Get the 3rd 16-bits. + Value = ((Value + 0x80008000LL) >> 32) & 0xffff; + break; + case Mips::fixup_Mips_HIGHEST: + // Get the 4th 16-bits. + Value = ((Value + 0x800080008000LL) >> 48) & 0xffff; + break; } return Value; @@ -168,7 +176,9 @@ public: { "fixup_Mips_GPOFF_LO", 0, 16, 0 }, { "fixup_Mips_GOT_PAGE", 0, 16, 0 }, { "fixup_Mips_GOT_OFST", 0, 16, 0 }, - { "fixup_Mips_GOT_DISP", 0, 16, 0 } + { "fixup_Mips_GOT_DISP", 0, 16, 0 }, + { "fixup_Mips_HIGHER", 0, 16, 0 }, + { "fixup_Mips_HIGHEST", 0, 16, 0 } }; if (Kind < FirstTargetFixupKind) diff --git a/lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp b/lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp index 77c1524..1ff3044 100644 --- a/lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp +++ b/lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp @@ -169,6 +169,12 @@ unsigned MipsELFObjectWriter::GetRelocType(const MCValue &Target, Type = setRType2((unsigned)ELF::R_MIPS_SUB, Type); Type = setRType3((unsigned)ELF::R_MIPS_LO16, Type); break; + case Mips::fixup_Mips_HIGHER: + Type = ELF::R_MIPS_HIGHER; + break; + case Mips::fixup_Mips_HIGHEST: + Type = ELF::R_MIPS_HIGHEST; + break; } return Type; } diff --git a/lib/Target/Mips/MCTargetDesc/MipsFixupKinds.h b/lib/Target/Mips/MCTargetDesc/MipsFixupKinds.h index f5cbbd5..77faec5 100644 --- a/lib/Target/Mips/MCTargetDesc/MipsFixupKinds.h +++ b/lib/Target/Mips/MCTargetDesc/MipsFixupKinds.h @@ -110,6 +110,12 @@ namespace Mips { // resulting in - R_MIPS_GOT_DISP fixup_Mips_GOT_DISP, + // resulting in - R_MIPS_GOT_HIGHER + fixup_Mips_HIGHER, + + // resulting in - R_MIPS_HIGHEST + fixup_Mips_HIGHEST, + // Marker LastTargetFixupKind, NumTargetFixupKinds = LastTargetFixupKind - FirstTargetFixupKind diff --git a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp index ff3b3a7..8dab62d 100644 --- a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp +++ b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp @@ -255,6 +255,12 @@ getMachineOpValue(const MCInst &MI, const MCOperand &MO, case MCSymbolRefExpr::VK_Mips_TPREL_LO: FixupKind = Mips::fixup_Mips_TPREL_LO; break; + case MCSymbolRefExpr::VK_Mips_HIGHER: + FixupKind = Mips::fixup_Mips_HIGHER; + break; + case MCSymbolRefExpr::VK_Mips_HIGHEST: + FixupKind = Mips::fixup_Mips_HIGHEST; + break; } // switch Fixups.push_back(MCFixup::Create(0, MO.getExpr(), MCFixupKind(FixupKind))); |