| //===- SPARCV9.cpp --------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "InputFiles.h" |
| #include "Symbols.h" |
| #include "SyntheticSections.h" |
| #include "Target.h" |
| #include "lld/Common/ErrorHandler.h" |
| #include "llvm/Support/Endian.h" |
| |
| using namespace llvm; |
| using namespace llvm::support::endian; |
| using namespace llvm::ELF; |
| |
| namespace lld { |
| namespace elf { |
| |
| namespace { |
| class SPARCV9 final : public TargetInfo { |
| public: |
| SPARCV9(); |
| RelExpr getRelExpr(RelType type, const Symbol &s, |
| const uint8_t *loc) const override; |
| void writePlt(uint8_t *buf, uint64_t gotEntryAddr, uint64_t pltEntryAddr, |
| int32_t index, unsigned relOff) const override; |
| void relocateOne(uint8_t *loc, RelType type, uint64_t val) const override; |
| }; |
| } // namespace |
| |
| SPARCV9::SPARCV9() { |
| copyRel = R_SPARC_COPY; |
| gotRel = R_SPARC_GLOB_DAT; |
| noneRel = R_SPARC_NONE; |
| pltRel = R_SPARC_JMP_SLOT; |
| relativeRel = R_SPARC_RELATIVE; |
| symbolicRel = R_SPARC_64; |
| pltEntrySize = 32; |
| pltHeaderSize = 4 * pltEntrySize; |
| |
| defaultCommonPageSize = 8192; |
| defaultMaxPageSize = 0x100000; |
| defaultImageBase = 0x100000; |
| } |
| |
| RelExpr SPARCV9::getRelExpr(RelType type, const Symbol &s, |
| const uint8_t *loc) const { |
| switch (type) { |
| case R_SPARC_32: |
| case R_SPARC_UA32: |
| case R_SPARC_64: |
| case R_SPARC_UA64: |
| return R_ABS; |
| case R_SPARC_PC10: |
| case R_SPARC_PC22: |
| case R_SPARC_DISP32: |
| case R_SPARC_WDISP30: |
| return R_PC; |
| case R_SPARC_GOT10: |
| return R_GOT_OFF; |
| case R_SPARC_GOT22: |
| return R_GOT_OFF; |
| case R_SPARC_WPLT30: |
| return R_PLT_PC; |
| case R_SPARC_NONE: |
| return R_NONE; |
| default: |
| error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) + |
| ") against symbol " + toString(s)); |
| return R_NONE; |
| } |
| } |
| |
| void SPARCV9::relocateOne(uint8_t *loc, RelType type, uint64_t val) const { |
| switch (type) { |
| case R_SPARC_32: |
| case R_SPARC_UA32: |
| // V-word32 |
| checkUInt(loc, val, 32, type); |
| write32be(loc, val); |
| break; |
| case R_SPARC_DISP32: |
| // V-disp32 |
| checkInt(loc, val, 32, type); |
| write32be(loc, val); |
| break; |
| case R_SPARC_WDISP30: |
| case R_SPARC_WPLT30: |
| // V-disp30 |
| checkInt(loc, val, 32, type); |
| write32be(loc, (read32be(loc) & ~0x3fffffff) | ((val >> 2) & 0x3fffffff)); |
| break; |
| case R_SPARC_22: |
| // V-imm22 |
| checkUInt(loc, val, 22, type); |
| write32be(loc, (read32be(loc) & ~0x003fffff) | (val & 0x003fffff)); |
| break; |
| case R_SPARC_GOT22: |
| case R_SPARC_PC22: |
| // T-imm22 |
| write32be(loc, (read32be(loc) & ~0x003fffff) | ((val >> 10) & 0x003fffff)); |
| break; |
| case R_SPARC_WDISP19: |
| // V-disp19 |
| checkInt(loc, val, 21, type); |
| write32be(loc, (read32be(loc) & ~0x0007ffff) | ((val >> 2) & 0x0007ffff)); |
| break; |
| case R_SPARC_GOT10: |
| case R_SPARC_PC10: |
| // T-simm10 |
| write32be(loc, (read32be(loc) & ~0x000003ff) | (val & 0x000003ff)); |
| break; |
| case R_SPARC_64: |
| case R_SPARC_UA64: |
| // V-xword64 |
| write64be(loc, val); |
| break; |
| default: |
| llvm_unreachable("unknown relocation"); |
| } |
| } |
| |
| void SPARCV9::writePlt(uint8_t *buf, uint64_t gotEntryAddr, |
| uint64_t pltEntryAddr, int32_t index, |
| unsigned relOff) const { |
| const uint8_t pltData[] = { |
| 0x03, 0x00, 0x00, 0x00, // sethi (. - .PLT0), %g1 |
| 0x30, 0x68, 0x00, 0x00, // ba,a %xcc, .PLT1 |
| 0x01, 0x00, 0x00, 0x00, // nop |
| 0x01, 0x00, 0x00, 0x00, // nop |
| 0x01, 0x00, 0x00, 0x00, // nop |
| 0x01, 0x00, 0x00, 0x00, // nop |
| 0x01, 0x00, 0x00, 0x00, // nop |
| 0x01, 0x00, 0x00, 0x00 // nop |
| }; |
| memcpy(buf, pltData, sizeof(pltData)); |
| |
| uint64_t off = pltHeaderSize + pltEntrySize * index; |
| relocateOne(buf, R_SPARC_22, off); |
| relocateOne(buf + 4, R_SPARC_WDISP19, -(off + 4 - pltEntrySize)); |
| } |
| |
| TargetInfo *getSPARCV9TargetInfo() { |
| static SPARCV9 target; |
| return ⌖ |
| } |
| |
| } // namespace elf |
| } // namespace lld |