forked from OSchip/llvm-project
[ELF][MIPS] Create combined dynamic relocation type R_MIPS_REL32/R_MIPS_64/R_MIPS_NONE
MIPS N64 ABI packs multiple relocations into the single relocation record. Particularly it requires to represent dynamic relative relocation as a combination of R_MIPS_REL32 and R_MIPS_64 relocations. llvm-svn: 268565
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@ -1235,6 +1235,9 @@ template <class ELFT> MipsTargetInfo<ELFT>::MipsTargetInfo() {
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UseLazyBinding = true;
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CopyRel = R_MIPS_COPY;
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PltRel = R_MIPS_JUMP_SLOT;
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if (ELFT::Is64Bits)
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RelativeRel = (R_MIPS_64 << 8) | R_MIPS_REL32;
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else
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RelativeRel = R_MIPS_REL32;
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}
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@ -1286,7 +1289,7 @@ RelExpr MipsTargetInfo<ELFT>::getRelExpr(uint32_t Type,
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template <class ELFT>
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uint32_t MipsTargetInfo<ELFT>::getDynRel(uint32_t Type) const {
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if (Type == R_MIPS_32 || Type == R_MIPS_64)
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return R_MIPS_REL32;
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return RelativeRel;
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StringRef S = getELFRelocationTypeName(EM_MIPS, Type);
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error("relocation " + S + " cannot be used when making a shared object; "
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"recompile with -fPIC.");
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@ -1452,6 +1455,9 @@ void MipsTargetInfo<ELFT>::relocateOne(uint8_t *Loc, uint32_t Type,
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case R_MIPS_32:
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write32<E>(Loc, Val);
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break;
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case R_MIPS_64:
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write64<E>(Loc, Val);
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break;
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case R_MIPS_26: {
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uint32_t Instr = read32<E>(Loc);
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write32<E>(Loc, (Instr & ~0x3ffffff) | (Val >> 2));
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@ -0,0 +1,67 @@
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# Check R_MIPS_64 relocation calculation.
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# RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux %s -o %t.o
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# RUN: ld.lld -shared %t.o -o %t.so
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# RUN: llvm-objdump -t -s %t.so | FileCheck -check-prefix=SYM %s
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# RUN: llvm-readobj -r -dynamic-table -mips-plt-got %t.so | FileCheck %s
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# REQUIRES: mips
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.global __start
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__start:
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nop
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.data
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.type v1,@object
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.size v1,4
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v1:
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.quad 0
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.globl v2
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.type v2,@object
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.size v2,8
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v2:
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.quad v2+8 # R_MIPS_64 target v2 addend 8
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.quad v1 # R_MIPS_64 target v1 addend 0
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# SYM: Contents of section .data:
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# SYM-NEXT: 30000 00000000 00000000 00000000 00000000
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# ^-- v2
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# SYM-NEXT: 30010 00000000 00030000
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# ^-- v1
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# SYM: SYMBOL TABLE:
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# SYM: 00030000 l .data 00000004 v1
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# SYM: 00030008 g .data 00000008 v2
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# CHECK: Relocations [
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# CHECK-NEXT: Section (7) .rela.dyn {
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# CHECK-NEXT: 0x30008 R_MIPS_REL32/R_MIPS_64/R_MIPS_NONE v2 0x8
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# CHECK-NEXT: 0x30010 R_MIPS_REL32/R_MIPS_64/R_MIPS_NONE - 0x30000
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# CHECK-NEXT: }
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# CHECK-NEXT: ]
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# CHECK: DynamicSection [
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# CHECK: Tag Type Name/Value
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# CHECK: 0x0000000000000008 RELASZ 48 (bytes)
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# CHECK: 0x0000000000000009 RELAENT 24 (bytes)
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# CHECK: Primary GOT {
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# CHECK-NEXT: Canonical gp value:
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# CHECK-NEXT: Reserved entries [
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# CHECK: ]
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# CHECK-NEXT: Local entries [
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# CHECK-NEXT: ]
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# CHECK-NEXT: Global entries [
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# CHECK-NEXT: Entry {
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# CHECK-NEXT: Address:
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# CHECK-NEXT: Access:
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# CHECK-NEXT: Initial: 0x30008
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# CHECK-NEXT: Value: 0x30008
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# CHECK-NEXT: Type: Object
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# CHECK-NEXT: Section: .data
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# CHECK-NEXT: Name: v2
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# CHECK-NEXT: }
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# CHECK-NEXT: ]
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# CHECK-NEXT: Number of TLS and multi-GOT entries: 0
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# CHECK-NEXT: }
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