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//===- 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;
using namespace lld;
using namespace lld::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, const Symbol &sym,
uint64_t pltEntryAddr) const override;
void relocate(uint8_t *loc, const Relocation &rel,
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:
case R_SPARC_H44:
case R_SPARC_M44:
case R_SPARC_L44:
case R_SPARC_HH22:
case R_SPARC_HM10:
case R_SPARC_LM22:
case R_SPARC_HI22:
case R_SPARC_LO10:
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;
case R_SPARC_TLS_LE_HIX22:
case R_SPARC_TLS_LE_LOX10:
return R_TLS;
default:
error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) +
") against symbol " + toString(s));
return R_NONE;
}
}
void SPARCV9::relocate(uint8_t *loc, const Relocation &rel,
uint64_t val) const {
switch (rel.type) {
case R_SPARC_32:
case R_SPARC_UA32:
// V-word32
checkUInt(loc, val, 32, rel);
write32be(loc, val);
break;
case R_SPARC_DISP32:
// V-disp32
checkInt(loc, val, 32, rel);
write32be(loc, val);
break;
case R_SPARC_WDISP30:
case R_SPARC_WPLT30:
// V-disp30
checkInt(loc, val, 32, rel);
write32be(loc, (read32be(loc) & ~0x3fffffff) | ((val >> 2) & 0x3fffffff));
break;
case R_SPARC_22:
// V-imm22
checkUInt(loc, val, 22, rel);
write32be(loc, (read32be(loc) & ~0x003fffff) | (val & 0x003fffff));
break;
case R_SPARC_GOT22:
case R_SPARC_PC22:
case R_SPARC_LM22:
// T-imm22
write32be(loc, (read32be(loc) & ~0x003fffff) | ((val >> 10) & 0x003fffff));
break;
case R_SPARC_HI22:
// V-imm22
checkUInt(loc, val >> 10, 22, rel);
write32be(loc, (read32be(loc) & ~0x003fffff) | ((val >> 10) & 0x003fffff));
break;
case R_SPARC_WDISP19:
// V-disp19
checkInt(loc, val, 21, rel);
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_LO10:
// T-simm13
write32be(loc, (read32be(loc) & ~0x00001fff) | (val & 0x000003ff));
break;
case R_SPARC_64:
case R_SPARC_UA64:
// V-xword64
write64be(loc, val);
break;
case R_SPARC_HH22:
// V-imm22
checkUInt(loc, val >> 42, 22, rel);
write32be(loc, (read32be(loc) & ~0x003fffff) | ((val >> 42) & 0x003fffff));
break;
case R_SPARC_HM10:
// T-simm13
write32be(loc, (read32be(loc) & ~0x00001fff) | ((val >> 32) & 0x000003ff));
break;
case R_SPARC_H44:
// V-imm22
checkUInt(loc, val >> 22, 22, rel);
write32be(loc, (read32be(loc) & ~0x003fffff) | ((val >> 22) & 0x003fffff));
break;
case R_SPARC_M44:
// T-imm10
write32be(loc, (read32be(loc) & ~0x000003ff) | ((val >> 12) & 0x000003ff));
break;
case R_SPARC_L44:
// T-imm13
write32be(loc, (read32be(loc) & ~0x00001fff) | (val & 0x00000fff));
break;
case R_SPARC_TLS_LE_HIX22:
// T-imm22
write32be(loc, (read32be(loc) & ~0x003fffff) | ((~val >> 10) & 0x003fffff));
break;
case R_SPARC_TLS_LE_LOX10:
// T-simm13
write32be(loc, (read32be(loc) & ~0x00001fff) | (val & 0x000003ff) | 0x1C00);
break;
default:
llvm_unreachable("unknown relocation");
}
}
void SPARCV9::writePlt(uint8_t *buf, const Symbol & /*sym*/,
uint64_t pltEntryAddr) 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 = pltEntryAddr - in.plt->getVA();
relocateNoSym(buf, R_SPARC_22, off);
relocateNoSym(buf + 4, R_SPARC_WDISP19, -(off + 4 - pltEntrySize));
}
TargetInfo *elf::getSPARCV9TargetInfo() {
static SPARCV9 target;
return ⌖
}
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