[llvm] r218388 - Refactor the RelocVisitor::visit method
Renato Golin
renato.golin at linaro.org
Wed Sep 24 10:00:42 PDT 2014
Author: rengolin
Date: Wed Sep 24 12:00:42 2014
New Revision: 218388
URL: http://llvm.org/viewvc/llvm-project?rev=218388&view=rev
Log:
Refactor the RelocVisitor::visit method
This change replaces the brittle if/else chain of string comparisons
with a switch statement on the detected target triple, removing the
need for testing arbitrary architecture names returned from
getFileFormatName, whose primary purpose seems to be for display
(user-interface) purposes. The visitor now takes a reference to the
object file, rather than its arbitrary file format name to figure out
whether the file is a 32 or 64-bit object file and what the detected
target triple is.
A set of tests have been added to help show that the refactoring processes
relocations for the same targets as the original code.
Patch by Charlie Turner.
Added:
llvm/trunk/test/DebugInfo/processes-relocations.ll
Modified:
llvm/trunk/include/llvm/Object/ELFObjectFile.h
llvm/trunk/include/llvm/Object/RelocVisitor.h
llvm/trunk/lib/DebugInfo/DWARFContext.cpp
Modified: llvm/trunk/include/llvm/Object/ELFObjectFile.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Object/ELFObjectFile.h?rev=218388&r1=218387&r2=218388&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Object/ELFObjectFile.h (original)
+++ llvm/trunk/include/llvm/Object/ELFObjectFile.h Wed Sep 24 12:00:42 2014
@@ -924,6 +924,8 @@ unsigned ELFObjectFile<ELFT>::getArch()
default:
report_fatal_error("Invalid ELFCLASS!");
}
+ case ELF::EM_PPC:
+ return Triple::ppc;
case ELF::EM_PPC64:
return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
case ELF::EM_S390:
Modified: llvm/trunk/include/llvm/Object/RelocVisitor.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Object/RelocVisitor.h?rev=218388&r1=218387&r2=218388&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Object/RelocVisitor.h (original)
+++ llvm/trunk/include/llvm/Object/RelocVisitor.h Wed Sep 24 12:00:42 2014
@@ -40,16 +40,18 @@ struct RelocToApply {
/// @brief Base class for object file relocation visitors.
class RelocVisitor {
public:
- explicit RelocVisitor(StringRef FileFormat)
- : FileFormat(FileFormat), HasError(false) {}
+ explicit RelocVisitor(ObjectFile &Obj)
+ : ObjToVisit(Obj), HasError(false) {}
// TODO: Should handle multiple applied relocations via either passing in the
// previously computed value or just count paired relocations as a single
// visit.
RelocToApply visit(uint32_t RelocType, RelocationRef R, uint64_t SecAddr = 0,
uint64_t Value = 0) {
- if (FileFormat == "ELF64-x86-64") {
- switch (RelocType) {
+ if (ObjToVisit.getBytesInAddress() == 8) { // 64-bit object file
+ switch (ObjToVisit.getArch()) {
+ case Triple::x86_64:
+ switch (RelocType) {
case llvm::ELF::R_X86_64_NONE:
return visitELF_X86_64_NONE(R);
case llvm::ELF::R_X86_64_64:
@@ -63,113 +65,129 @@ public:
default:
HasError = true;
return RelocToApply();
- }
- } else if (FileFormat == "ELF32-i386") {
- switch (RelocType) {
- case llvm::ELF::R_386_NONE:
- return visitELF_386_NONE(R);
- case llvm::ELF::R_386_32:
- return visitELF_386_32(R, Value);
- case llvm::ELF::R_386_PC32:
- return visitELF_386_PC32(R, Value, SecAddr);
- default:
- HasError = true;
- return RelocToApply();
- }
- } else if (FileFormat == "ELF64-ppc64") {
- switch (RelocType) {
- case llvm::ELF::R_PPC64_ADDR32:
- return visitELF_PPC64_ADDR32(R, Value);
- case llvm::ELF::R_PPC64_ADDR64:
- return visitELF_PPC64_ADDR64(R, Value);
- default:
- HasError = true;
- return RelocToApply();
- }
- } else if (FileFormat == "ELF32-ppc") {
- switch (RelocType) {
- case llvm::ELF::R_PPC_ADDR32:
- return visitELF_PPC_ADDR32(R, Value);
- default:
- HasError = true;
- return RelocToApply();
- }
- } else if (FileFormat == "ELF32-mips") {
- switch (RelocType) {
- case llvm::ELF::R_MIPS_32:
- return visitELF_MIPS_32(R, Value);
- default:
- HasError = true;
- return RelocToApply();
- }
- } else if (FileFormat == "ELF64-mips") {
- switch (RelocType) {
- case llvm::ELF::R_MIPS_32:
- return visitELF_MIPS_32(R, Value);
- case llvm::ELF::R_MIPS_64:
- return visitELF_MIPS_64(R, Value);
- default:
- HasError = true;
- return RelocToApply();
- }
- } else if (FileFormat == "ELF64-aarch64") {
- switch (RelocType) {
- case llvm::ELF::R_AARCH64_ABS32:
- return visitELF_AARCH64_ABS32(R, Value);
- case llvm::ELF::R_AARCH64_ABS64:
- return visitELF_AARCH64_ABS64(R, Value);
- default:
- HasError = true;
- return RelocToApply();
- }
- } else if (FileFormat == "ELF64-s390") {
- switch (RelocType) {
- case llvm::ELF::R_390_32:
- return visitELF_390_32(R, Value);
- case llvm::ELF::R_390_64:
- return visitELF_390_64(R, Value);
- default:
- HasError = true;
- return RelocToApply();
- }
- } else if (FileFormat == "ELF32-sparc") {
- switch (RelocType) {
- case llvm::ELF::R_SPARC_32:
- case llvm::ELF::R_SPARC_UA32:
- return visitELF_SPARC_32(R, Value);
- default:
- HasError = true;
- return RelocToApply();
- }
- } else if (FileFormat == "ELF64-sparc") {
- switch (RelocType) {
- case llvm::ELF::R_SPARC_32:
- case llvm::ELF::R_SPARC_UA32:
- return visitELF_SPARCV9_32(R, Value);
- case llvm::ELF::R_SPARC_64:
- case llvm::ELF::R_SPARC_UA64:
- return visitELF_SPARCV9_64(R, Value);
+ }
+ case Triple::aarch64:
+ switch (RelocType) {
+ case llvm::ELF::R_AARCH64_ABS32:
+ return visitELF_AARCH64_ABS32(R, Value);
+ case llvm::ELF::R_AARCH64_ABS64:
+ return visitELF_AARCH64_ABS64(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::mips64el:
+ case Triple::mips64:
+ switch (RelocType) {
+ case llvm::ELF::R_MIPS_32:
+ return visitELF_MIPS_32(R, Value);
+ case llvm::ELF::R_MIPS_64:
+ return visitELF_MIPS_64(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::ppc64le:
+ case Triple::ppc64:
+ switch (RelocType) {
+ case llvm::ELF::R_PPC64_ADDR32:
+ return visitELF_PPC64_ADDR32(R, Value);
+ case llvm::ELF::R_PPC64_ADDR64:
+ return visitELF_PPC64_ADDR64(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::systemz:
+ switch (RelocType) {
+ case llvm::ELF::R_390_32:
+ return visitELF_390_32(R, Value);
+ case llvm::ELF::R_390_64:
+ return visitELF_390_64(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::sparcv9:
+ switch (RelocType) {
+ case llvm::ELF::R_SPARC_32:
+ case llvm::ELF::R_SPARC_UA32:
+ return visitELF_SPARCV9_32(R, Value);
+ case llvm::ELF::R_SPARC_64:
+ case llvm::ELF::R_SPARC_UA64:
+ return visitELF_SPARCV9_64(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
default:
HasError = true;
return RelocToApply();
}
- } else if (FileFormat == "ELF32-arm") {
- switch (RelocType) {
+ } else if (ObjToVisit.getBytesInAddress() == 4) { // 32-bit object file
+ switch (ObjToVisit.getArch()) {
+ case Triple::x86:
+ switch (RelocType) {
+ case llvm::ELF::R_386_NONE:
+ return visitELF_386_NONE(R);
+ case llvm::ELF::R_386_32:
+ return visitELF_386_32(R, Value);
+ case llvm::ELF::R_386_PC32:
+ return visitELF_386_PC32(R, Value, SecAddr);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::ppc:
+ switch (RelocType) {
+ case llvm::ELF::R_PPC_ADDR32:
+ return visitELF_PPC_ADDR32(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::arm:
+ case Triple::armeb:
+ switch (RelocType) {
+ default:
+ HasError = true;
+ return RelocToApply();
+ case llvm::ELF::R_ARM_ABS32:
+ return visitELF_ARM_ABS32(R, Value);
+ }
+ case Triple::hexagon:
+ llvm_unreachable("Unimplemented");
+ case Triple::mipsel:
+ case Triple::mips:
+ switch (RelocType) {
+ case llvm::ELF::R_MIPS_32:
+ return visitELF_MIPS_32(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
+ case Triple::sparc:
+ switch (RelocType) {
+ case llvm::ELF::R_SPARC_32:
+ case llvm::ELF::R_SPARC_UA32:
+ return visitELF_SPARC_32(R, Value);
+ default:
+ HasError = true;
+ return RelocToApply();
+ }
default:
HasError = true;
return RelocToApply();
- case llvm::ELF::R_ARM_ABS32:
- return visitELF_ARM_ABS32(R, Value);
}
+ } else {
+ report_fatal_error("Invalid word size in object file");
}
- HasError = true;
- return RelocToApply();
}
bool error() { return HasError; }
private:
- StringRef FileFormat;
+ ObjectFile &ObjToVisit;
bool HasError;
int64_t getAddend32LE(RelocationRef R) {
Modified: llvm/trunk/lib/DebugInfo/DWARFContext.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/DebugInfo/DWARFContext.cpp?rev=218388&r1=218387&r2=218388&view=diff
==============================================================================
--- llvm/trunk/lib/DebugInfo/DWARFContext.cpp (original)
+++ llvm/trunk/lib/DebugInfo/DWARFContext.cpp Wed Sep 24 12:00:42 2014
@@ -667,7 +667,7 @@ DWARFContextInMemory::DWARFContextInMemo
Sym->getAddress(SymAddr);
}
- object::RelocVisitor V(Obj.getFileFormatName());
+ object::RelocVisitor V(Obj);
// The section address is always 0 for debug sections.
object::RelocToApply R(V.visit(Type, Reloc, 0, SymAddr));
if (V.error()) {
Added: llvm/trunk/test/DebugInfo/processes-relocations.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/processes-relocations.ll?rev=218388&view=auto
==============================================================================
--- llvm/trunk/test/DebugInfo/processes-relocations.ll (added)
+++ llvm/trunk/test/DebugInfo/processes-relocations.ll Wed Sep 24 12:00:42 2014
@@ -0,0 +1,26 @@
+; Make sure that for each supported architecture in RelocVisitor::visit,
+; the visitor does compute the relocation.
+; RUN: llc -filetype=obj -O0 < %s -mtriple x86_64-none-linux-eabi | llvm-dwarfdump - 2>&1 | FileCheck %s
+; RUN: llc -filetype=obj -O0 < %s -mtriple i386-none-linux-eabi | llvm-dwarfdump - 2>&1 | FileCheck %s
+; RUN: llc -filetype=obj -O0 < %s -mtriple powerpc64-unknown-linux-eabi | llvm-dwarfdump - 2>&1 | FileCheck %s
+; RUN: llc -filetype=obj -O0 < %s -mtriple powerpc-unknown-linux-eabi | llvm-dwarfdump - 2>&1 | FileCheck %s
+; RUN: llc -filetype=obj -O0 < %s -mtriple mips-unknown-linux-eabi | llvm-dwarfdump - 2>&1 | FileCheck %s
+; RUN: llc -filetype=obj -O0 < %s -mtriple mips64-unknown-linux-eabi | llvm-dwarfdump - 2>&1 | FileCheck %s
+; RUN: llc -filetype=obj -O0 < %s -mtriple arm-unknown-linux-eabi | llvm-dwarfdump - 2>&1 | FileCheck %s
+; RUN: llc -filetype=obj -O0 < %s -mtriple aarch64-unknown-linux-eabi | llvm-dwarfdump - 2>&1 | FileCheck %s
+; RUN: llc -filetype=obj -O0 < %s -mtriple s390x-unknown-linux-eabi | llvm-dwarfdump - 2>&1 | FileCheck %s
+; RUN: llc -filetype=obj -O0 < %s -mtriple sparc-unknown-linux-eabi | llvm-dwarfdump - 2>&1 | FileCheck %s
+; RUN: llc -filetype=obj -O0 < %s -mtriple sparcv9-unknown-linux-eabi | llvm-dwarfdump - 2>&1 | FileCheck %s
+
+; CHECK-NOT: failed to compute relocation
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4}
+!llvm.ident = !{!5}
+
+!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.6.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !2, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/a/empty.c] [DW_LANG_C99]
+!1 = metadata !{metadata !"empty.c", metadata !"/a"}
+!2 = metadata !{}
+!3 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
+!4 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
+!5 = metadata !{metadata !"clang version 3.6.0 "}
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