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[RuntimeDyld] Adapt PPC64 relocations to PPC32 

Begin adapting some of the implemented PPC64 relocations for PPC32 (with a
test case).

Patch by Pierre-Andre Saulais!

llvm-svn: 243991
This commit is contained in:
Hal Finkel 2015-08-04 15:29:00 +00:00
parent 75ced2782b
commit 23cdeeea0f
4 changed files with 76 additions and 0 deletions
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23
llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
View File

@ -887,6 +887,26 @@ static inline uint16_t applyPPChighesta (uint64_t value) {
return ((value + 0x8000) >> 48) & 0xffff;
}
void RuntimeDyldELF::resolvePPC32Relocation(const SectionEntry &Section,
uint64_t Offset, uint64_t Value,
uint32_t Type, int64_t Addend) {
uint8_t *LocalAddress = Section.Address + Offset;
switch (Type) {
default:
llvm_unreachable("Relocation type not implemented yet!");
break;
case ELF::R_PPC_ADDR16_LO:
writeInt16BE(LocalAddress, applyPPClo(Value + Addend));
break;
case ELF::R_PPC_ADDR16_HI:
writeInt16BE(LocalAddress, applyPPChi(Value + Addend));
break;
case ELF::R_PPC_ADDR16_HA:
writeInt16BE(LocalAddress, applyPPCha(Value + Addend));
break;
}
}
void RuntimeDyldELF::resolvePPC64Relocation(const SectionEntry &Section,
uint64_t Offset, uint64_t Value,
uint32_t Type, int64_t Addend) {
@ -1075,6 +1095,9 @@ void RuntimeDyldELF::resolveRelocation(const SectionEntry &Section,
else
llvm_unreachable("Mips ABI not handled");
break;
case Triple::ppc:
resolvePPC32Relocation(Section, Offset, Value, Type, Addend);
break;
case Triple::ppc64: // Fall through.
case Triple::ppc64le:
resolvePPC64Relocation(Section, Offset, Value, Type, Addend);

3
llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.h
View File

@ -43,6 +43,9 @@ class RuntimeDyldELF : public RuntimeDyldImpl {
void resolveMIPSRelocation(const SectionEntry &Section, uint64_t Offset,
uint32_t Value, uint32_t Type, int32_t Addend);
void resolvePPC32Relocation(const SectionEntry &Section, uint64_t Offset,
uint64_t Value, uint32_t Type, int64_t Addend);
void resolvePPC64Relocation(const SectionEntry &Section, uint64_t Offset,
uint64_t Value, uint32_t Type, int64_t Addend);

3
llvm/test/ExecutionEngine/RuntimeDyld/PowerPC/lit.local.cfg Normal file
View File

@ -0,0 +1,3 @@
if not 'PowerPC' in config.root.targets:
config.unsupported = True

47
llvm/test/ExecutionEngine/RuntimeDyld/PowerPC/ppc32_elf_rel_addr16.s Normal file
View File

@ -0,0 +1,47 @@
# RUN: llvm-mc -triple=powerpc-unknown-linux-gnu -filetype=obj -o %T/ppc32_elf_rel_addr16.o %s
# RUN: llvm-rtdyld -triple=powerpc-unknown-linux-gnu -verify -check=%s %T/ppc32_elf_rel_addr16.o
.text
.file "ppc32_elf_rel_addr16.ll"
.globl lookup
.align 2
.type lookup,@function
lookup: # @lookup
.Lfunc_begin0:
# BB#0:
stw 31, -4(1)
stwu 1, -16(1)
insn_hi:
# Check the higher 16-bits of the symbol's absolute address
# rtdyld-check: decode_operand(insn_hi, 1) = elements[31:16]
lis 4, elements@ha
slwi 3, 3, 2
mr 31, 1
insn_lo:
# Check the lower 16-bits of the symbol's absolute address
# rtdyld-check: decode_operand(insn_lo, 2) = elements[15:0]
la 4, elements@l(4)
lwzx 3, 4, 3
addi 1, 1, 16
lwz 31, -4(1)
blr
.Lfunc_end0:
.size lookup, .Lfunc_end0-.Lfunc_begin0
.type elements,@object # @elements
.data
.globl elements
.align 2
elements:
.long 14 # 0xe
.long 4 # 0x4
.long 1 # 0x1
.long 3 # 0x3
.long 13 # 0xd
.long 0 # 0x0
.long 32 # 0x20
.long 334 # 0x14e
.size elements, 32
.ident "clang version 3.7.0 "
.section ".note.GNU-stack","",@progbits