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[MC][RISCV] Support .reloc *, BFD_RELOC_{NONE,32,64}, * 

BFD_RELOC_NONE is useful for ld --gc-sections: it provides a generic way indicating a dependency between two sections.
This commit is contained in:
Fangrui Song 2021-03-05 21:45:11 -08:00
parent 59ff9315fd
commit 2d922de3af
2 changed files with 13 additions and 0 deletions
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3
llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp
View File

@ -30,6 +30,9 @@ Optional<MCFixupKind> RISCVAsmBackend::getFixupKind(StringRef Name) const {
#define ELF_RELOC(X, Y) .Case(#X, Y)
#include "llvm/BinaryFormat/ELFRelocs/RISCV.def"
#undef ELF_RELOC
.Case("BFD_RELOC_NONE", ELF::R_RISCV_NONE)
.Case("BFD_RELOC_32", ELF::R_RISCV_32)
.Case("BFD_RELOC_64", ELF::R_RISCV_64)
.Default(-1u);
if (Type != -1u)
return static_cast<MCFixupKind>(FirstLiteralRelocationKind + Type);

10
llvm/test/MC/RISCV/reloc-directive.s
View File

@ -9,6 +9,9 @@
# PRINT: .reloc 0, R_RISCV_32, .data+2
# PRINT: .reloc 0, R_RISCV_SET32, foo+3
# PRINT: .reloc 0, R_RISCV_32_PCREL, 5
# PRINT: .reloc 0, BFD_RELOC_NONE, 9
# PRINT-NEXT: .reloc 0, BFD_RELOC_32, 9
# PRINT-NEXT: .reloc 0, BFD_RELOC_64, 9
# CHECK: 0x8 R_RISCV_NONE .data 0x0
# CHECK-NEXT: 0x4 R_RISCV_NONE foo 0x4
@ -16,6 +19,9 @@
# CHECK-NEXT: 0x0 R_RISCV_32 .data 0x2
# CHECK-NEXT: 0x0 R_RISCV_SET32 foo 0x3
# CHECK-NEXT: 0x0 R_RISCV_32_PCREL - 0x5
# CHECK-NEXT: 0x0 R_RISCV_NONE - 0x9
# CHECK-NEXT: 0x0 R_RISCV_32 - 0x9
# CHECK-NEXT: 0x0 R_RISCV_64 - 0x9
.text
ret
nop
@ -28,6 +34,10 @@
.reloc 0, R_RISCV_SET32, foo+3
.reloc 0, R_RISCV_32_PCREL, 5
.reloc 0, BFD_RELOC_NONE, 9
.reloc 0, BFD_RELOC_32, 9
.reloc 0, BFD_RELOC_64, 9
.data
.globl foo
foo: