RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-22 18:54:02 +01:00
Code Issues Projects Releases Wiki Activity

[AArch64] Decorate AArch64 instrs with OPERAND_PCREL

Browse Source 
Summary:
This is a canonical way to teach objdump to print the target
symbols for branches when disassembling AArch64 code.

Reviewers: evandro, t.p.northover, espindola

Reviewed By: t.p.northover

Differential Revision: https://reviews.llvm.org/D44851

llvm-svn: 328638
This commit is contained in:
Rafael Auler 2018-03-27 16:58:01 +00:00
parent f4f5aa42aa
commit cff8c7276f
3 changed files with 30 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
lib/Target/AArch64/AArch64InstrFormats.td
View File

@ -1244,6 +1244,7 @@ def am_brcond : Operand<OtherVT> {
let DecoderMethod = "DecodePCRelLabel19";
let PrintMethod = "printAlignedLabel";
let ParserMatchClass = PCRelLabel19Operand;
let OperandType = "OPERAND_PCREL";
}
class BranchCond : I<(outs), (ins ccode:$cond, am_brcond:$target),
@ -1299,6 +1300,7 @@ def am_tbrcond : Operand<OtherVT> {
let EncoderMethod = "getTestBranchTargetOpValue";
let PrintMethod = "printAlignedLabel";
let ParserMatchClass = BranchTarget14Operand;
let OperandType = "OPERAND_PCREL";
}
// AsmOperand classes to emit (or not) special diagnostics
@ -1375,11 +1377,13 @@ def am_b_target : Operand<OtherVT> {
let EncoderMethod = "getBranchTargetOpValue";
let PrintMethod = "printAlignedLabel";
let ParserMatchClass = BranchTarget26Operand;
let OperandType = "OPERAND_PCREL";
}
def am_bl_target : Operand<i64> {
let EncoderMethod = "getBranchTargetOpValue";
let PrintMethod = "printAlignedLabel";
let ParserMatchClass = BranchTarget26Operand;
let OperandType = "OPERAND_PCREL";
}
class BImm<bit op, dag iops, string asm, list<dag> pattern>
@ -2667,6 +2671,7 @@ def am_ldrlit : Operand<iPTR> {
let DecoderMethod = "DecodePCRelLabel19";
let PrintMethod = "printAlignedLabel";
let ParserMatchClass = PCRelLabel19Operand;
let OperandType = "OPERAND_PCREL";
}
let mayLoad = 1, mayStore = 0, hasSideEffects = 0 in

23
lib/Target/AArch64/MCTargetDesc/AArch64MCTargetDesc.cpp
View File

@ -131,8 +131,29 @@ createWinCOFFStreamer(MCContext &Ctx, std::unique_ptr<MCAsmBackend> &&TAB,
IncrementalLinkerCompatible);
}
namespace {
class AArch64MCInstrAnalysis : public MCInstrAnalysis {
public:
AArch64MCInstrAnalysis(const MCInstrInfo *Info) : MCInstrAnalysis(Info) {}
bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
uint64_t &Target) const override {
if (Inst.getNumOperands() == 0 ||
Info->get(Inst.getOpcode()).OpInfo[0].OperandType !=
MCOI::OPERAND_PCREL)
return false;
int64_t Imm = Inst.getOperand(0).getImm() * 4;
Target = Addr + Imm;
return true;
}
};
} // end anonymous namespace
static MCInstrAnalysis *createAArch64InstrAnalysis(const MCInstrInfo *Info) {
return new MCInstrAnalysis(Info);
return new AArch64MCInstrAnalysis(Info);
}
// Force static initialization.

3
test/tools/llvm-objdump/AArch64/pc-rel-targets.test Normal file
View File

@ -0,0 +1,3 @@
// RUN: llvm-objdump -d %p/Inputs/kextbundle.macho-aarch64 | FileCheck %s
CHECK: 4008: 03 00 00 94 bl #12 <_bar.stub>