blob: 36f5c836930ec1774b7b36e73030e485521d43b8 [file] [log] [blame]
//===- SPARCV9.cpp --------------------------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#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, 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;
PltRel = R_SPARC_JMP_SLOT;
RelativeRel = R_SPARC_RELATIVE;
GotEntrySize = 8;
PltEntrySize = 32;
PltHeaderSize = 4 * PltEntrySize;
PageSize = 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:
return R_INVALID;
}
}
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:
case R_SPARC_GLOB_DAT:
// V-xword64
write64be(Loc, Val);
break;
default:
error(getErrorLocation(Loc) + "unrecognized reloc " + Twine(Type));
}
}
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 = getPltEntryOffset(Index);
relocateOne(Buf, R_SPARC_22, Off);
relocateOne(Buf + 4, R_SPARC_WDISP19, -(Off + 4 - PltEntrySize));
}
TargetInfo *elf::getSPARCV9TargetInfo() {
static SPARCV9 Target;
return &Target;
}