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[ELF][RISCV] Add R_RISCV_IRELATIVE

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https://github.com/riscv/riscv-elf-psabi-doc/pull/131 assigned 58 to R_RISCV_IRELATIVE.

Differential Revision: https://reviews.llvm.org/D74022
This commit is contained in:
Fangrui Song 2020-02-04 20:33:41 -08:00
parent 5afd9fd916
commit 9f854c0489
3 changed files with 60 additions and 0 deletions
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1
lld/ELF/Arch/RISCV.cpp
View File

@ -77,6 +77,7 @@ RISCV::RISCV() {
noneRel = R_RISCV_NONE;
pltRel = R_RISCV_JUMP_SLOT;
relativeRel = R_RISCV_RELATIVE;
iRelativeRel = R_RISCV_IRELATIVE;
if (config->is64) {
symbolicRel = R_RISCV_64;
tlsModuleIndexRel = R_RISCV_TLS_DTPMOD64;

58
lld/test/ELF/riscv-ifunc-nonpreemptible.s Normal file
View File

@ -0,0 +1,58 @@
# REQUIRES: riscv
# RUN: llvm-mc -filetype=obj -triple=riscv32 %s -o %t.32.o
# RUN: ld.lld -pie %t.32.o -o %t.32
# RUN: llvm-readobj -r %t.32 | FileCheck --check-prefix=RELOC32 %s
# RUN: llvm-readelf -s %t.32 | FileCheck --check-prefix=SYM32 %s
# RUN: llvm-objdump -d --no-show-raw-insn %t.32 | FileCheck --check-prefix=DIS32 %s
# RUN: llvm-mc -filetype=obj -triple=riscv64 %s -o %t.64.o
# RUN: ld.lld -pie %t.64.o -o %t.64
# RUN: llvm-readobj -r %t.64 | FileCheck --check-prefix=RELOC64 %s
# RUN: llvm-readelf -s %t.64 | FileCheck --check-prefix=SYM64 %s
# RUN: llvm-objdump -d --no-show-raw-insn %t.64 | FileCheck --check-prefix=DIS64 %s
# RELOC32: .rela.dyn {
# RELOC32-NEXT: 0x3218 R_RISCV_IRELATIVE - 0x117C
# RELOC32-NEXT: }
# SYM32: 0001190 0 FUNC GLOBAL DEFAULT {{.*}} func
# DIS32: _start:
# DIS32-NEXT: 1180: auipc a0, 0
# DIS32-NEXT: addi a0, a0, 16
# DIS32: Disassembly of section .iplt:
# DIS32: func:
## 32-bit: &.got.plt[func]-. = 0x3218-0x1190 = 4096*2+136
# DIS32-NEXT: 1190: auipc t3, 2
# DIS32-NEXT: lw t3, 136(t3)
# DIS32-NEXT: jalr t1, t3
# DIS32-NEXT: nop
# RELOC64: .rela.dyn {
# RELOC64-NEXT: 0x3370 R_RISCV_IRELATIVE - 0x1260
# RELOC64-NEXT: }
# SYM64: 000000000001270 0 FUNC GLOBAL DEFAULT {{.*}} func
# DIS64: _start:
# DIS64-NEXT: 1264: auipc a0, 0
# DIS64-NEXT: addi a0, a0, 12
# DIS64: Disassembly of section .iplt:
# DIS64: func:
## 64-bit: &.got.plt[func]-. = 0x3370-0x1270 = 4096*2+256
# DIS64-NEXT: 1270: auipc t3, 2
# DIS64-NEXT: ld t3, 256(t3)
# DIS64-NEXT: jalr t1, t3
# DIS64-NEXT: nop
.text
.globl func
.type func, @gnu_indirect_function
func:
ret
.globl _start
_start:
.L:
auipc a0, %pcrel_hi(func)
addi a0, a0, %pcrel_lo(.L)

1
llvm/include/llvm/BinaryFormat/ELFRelocs/RISCV.def
View File

@ -57,3 +57,4 @@ ELF_RELOC(R_RISCV_SET8, 54)
ELF_RELOC(R_RISCV_SET16, 55)
ELF_RELOC(R_RISCV_SET32, 56)
ELF_RELOC(R_RISCV_32_PCREL, 57)
ELF_RELOC(R_RISCV_IRELATIVE, 58)