diff options
Diffstat (limited to 'lld/ELF/Arch/LoongArch.cpp')
| -rw-r--r-- | lld/ELF/Arch/LoongArch.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lld/ELF/Arch/LoongArch.cpp b/lld/ELF/Arch/LoongArch.cpp index 05fd38fb753f..464f5dfb320c 100644 --- a/lld/ELF/Arch/LoongArch.cpp +++ b/lld/ELF/Arch/LoongArch.cpp @@ -11,6 +11,7 @@ #include "Symbols.h" #include "SyntheticSections.h" #include "Target.h" +#include "llvm/Support/LEB128.h" using namespace llvm; using namespace llvm::object; @@ -41,6 +42,7 @@ public: }; } // end anonymous namespace +namespace { enum Op { SUB_W = 0x00110000, SUB_D = 0x00118000, @@ -65,6 +67,7 @@ enum Reg { R_T2 = 14, R_T3 = 15, }; +} // namespace // Mask out the input's lowest 12 bits for use with `pcalau12i`, in sequences // like `pcalau12i + addi.[wd]` or `pcalau12i + {ld,st}.*` where the `pcalau12i` @@ -153,6 +156,17 @@ static bool isJirl(uint32_t insn) { return (insn & 0xfc000000) == JIRL; } +static void handleUleb128(uint8_t *loc, uint64_t val) { + const uint32_t maxcount = 1 + 64 / 7; + uint32_t count; + const char *error = nullptr; + uint64_t orig = decodeULEB128(loc, &count, nullptr, &error); + if (count > maxcount || (count == maxcount && error)) + errorOrWarn(getErrorLocation(loc) + "extra space for uleb128"); + uint64_t mask = count < maxcount ? (1ULL << 7 * count) - 1 : -1ULL; + encodeULEB128((orig + val) & mask, loc, count); +} + LoongArch::LoongArch() { // The LoongArch ISA itself does not have a limit on page sizes. According to // the ISA manual, the PS (page size) field in MTLB entries and CSR.STLBPS is @@ -394,11 +408,13 @@ RelExpr LoongArch::getRelExpr(const RelType type, const Symbol &s, case R_LARCH_ADD16: case R_LARCH_ADD32: case R_LARCH_ADD64: + case R_LARCH_ADD_ULEB128: case R_LARCH_SUB6: case R_LARCH_SUB8: case R_LARCH_SUB16: case R_LARCH_SUB32: case R_LARCH_SUB64: + case R_LARCH_SUB_ULEB128: // The LoongArch add/sub relocs behave like the RISCV counterparts; reuse // the RelExpr to avoid code duplication. return R_RISCV_ADD; @@ -633,6 +649,9 @@ void LoongArch::relocate(uint8_t *loc, const Relocation &rel, case R_LARCH_ADD64: write64le(loc, read64le(loc) + val); return; + case R_LARCH_ADD_ULEB128: + handleUleb128(loc, val); + return; case R_LARCH_SUB6: *loc = (*loc & 0xc0) | ((*loc - val) & 0x3f); return; @@ -648,6 +667,9 @@ void LoongArch::relocate(uint8_t *loc, const Relocation &rel, case R_LARCH_SUB64: write64le(loc, read64le(loc) - val); return; + case R_LARCH_SUB_ULEB128: + handleUleb128(loc, -val); + return; case R_LARCH_MARK_LA: case R_LARCH_MARK_PCREL: |