diff options
Diffstat (limited to 'contrib/llvm-project/lld/ELF/Arch/LoongArch.cpp')
| -rw-r--r-- | contrib/llvm-project/lld/ELF/Arch/LoongArch.cpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/contrib/llvm-project/lld/ELF/Arch/LoongArch.cpp b/contrib/llvm-project/lld/ELF/Arch/LoongArch.cpp index 1c3e015efc16..996f9957a63c 100644 --- a/contrib/llvm-project/lld/ELF/Arch/LoongArch.cpp +++ b/contrib/llvm-project/lld/ELF/Arch/LoongArch.cpp @@ -463,6 +463,7 @@ RelExpr LoongArch::getRelExpr(const RelType type, const Symbol &s, case R_LARCH_B16: case R_LARCH_B21: case R_LARCH_B26: + case R_LARCH_CALL36: return R_PLT_PC; case R_LARCH_GOT_PC_HI20: case R_LARCH_GOT64_PC_LO20: @@ -590,6 +591,25 @@ void LoongArch::relocate(uint8_t *loc, const Relocation &rel, write32le(loc, setD10k16(read32le(loc), val >> 2)); return; + case R_LARCH_CALL36: { + // This relocation is designed for adjancent pcaddu18i+jirl pairs that + // are patched in one time. Because of sign extension of these insns' + // immediate fields, the relocation range is [-128G - 0x20000, +128G - + // 0x20000) (of course must be 4-byte aligned). + if (((int64_t)val + 0x20000) != llvm::SignExtend64(val + 0x20000, 38)) + reportRangeError(loc, rel, Twine(val), llvm::minIntN(38) - 0x20000, + llvm::maxIntN(38) - 0x20000); + checkAlignment(loc, val, 4, rel); + // Since jirl performs sign extension on the offset immediate, adds (1<<17) + // to original val to get the correct hi20. + uint32_t hi20 = extractBits(val + (1 << 17), 37, 18); + // Despite the name, the lower part is actually 18 bits with 4-byte aligned. + uint32_t lo16 = extractBits(val, 17, 2); + write32le(loc, setJ20(read32le(loc), hi20)); + write32le(loc + 4, setK16(read32le(loc + 4), lo16)); + return; + } + // Relocs intended for `addi`, `ld` or `st`. case R_LARCH_PCALA_LO12: // We have to again inspect the insn word to handle the R_LARCH_PCALA_LO12 |