forked from OSchip/llvm-project
Moved the GetTargetRelocation method to the PPCMachOWriterInfo object. The
PPCMachOWriter is now trivial. llvm-svn: 33818
This commit is contained in:
Bill Wendling
parent
c85e32c730
commit
2c350921e2
|
|
@ -12,35 +12,17 @@
|
|||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#include "PPCRelocations.h"
|
||||
#include "PPCTargetMachine.h"
|
||||
#include "llvm/PassManager.h"
|
||||
#include "llvm/CodeGen/MachOWriter.h"
|
||||
#include "llvm/Support/Compiler.h"
|
||||
#include "llvm/Support/OutputBuffer.h"
|
||||
using namespace llvm;
|
||||
|
||||
namespace {
|
||||
class VISIBILITY_HIDDEN PPCMachOWriter : public MachOWriter {
|
||||
public:
|
||||
struct VISIBILITY_HIDDEN PPCMachOWriter : public MachOWriter {
|
||||
PPCMachOWriter(std::ostream &O, PPCTargetMachine &TM)
|
||||
: MachOWriter(O, TM) {}
|
||||
|
||||
virtual void GetTargetRelocation(MachineRelocation &MR, MachOSection &From,
|
||||
MachOSection &To, bool Scattered);
|
||||
|
||||
// Constants for the relocation r_type field.
|
||||
// see <mach-o/ppc/reloc.h>
|
||||
enum { PPC_RELOC_VANILLA, // generic relocation
|
||||
PPC_RELOC_PAIR, // the second relocation entry of a pair
|
||||
PPC_RELOC_BR14, // 14 bit branch displacement to word address
|
||||
PPC_RELOC_BR24, // 24 bit branch displacement to word address
|
||||
PPC_RELOC_HI16, // a PAIR follows with the low 16 bits
|
||||
PPC_RELOC_LO16, // a PAIR follows with the high 16 bits
|
||||
PPC_RELOC_HA16, // a PAIR follows, which is sign extended to 32b
|
||||
PPC_RELOC_LO14 // LO16 with low 2 bits implicitly zero
|
||||
};
|
||||
};
|
||||
}
|
||||
|
||||
/// addPPCMachOObjectWriterPass - Returns a pass that outputs the generated code
|
||||
|
|
@ -52,115 +34,3 @@ void llvm::addPPCMachOObjectWriterPass(FunctionPassManager &FPM,
|
|||
FPM.add(MOW);
|
||||
FPM.add(createPPCCodeEmitterPass(TM, MOW->getMachineCodeEmitter()));
|
||||
}
|
||||
|
||||
/// GetTargetRelocation - For the MachineRelocation MR, convert it to one or
|
||||
/// more PowerPC MachORelocation(s), add the new relocations to the
|
||||
/// MachOSection, and rewrite the instruction at the section offset if required
|
||||
/// by that relocation type.
|
||||
void PPCMachOWriter::GetTargetRelocation(MachineRelocation &MR,
|
||||
MachOSection &From,
|
||||
MachOSection &To,
|
||||
bool Scattered) {
|
||||
uint64_t Addr = 0;
|
||||
|
||||
// Keep track of whether or not this is an externally defined relocation.
|
||||
bool isExtern = false;
|
||||
|
||||
// Get the address of whatever it is we're relocating, if possible.
|
||||
if (!isExtern)
|
||||
Addr = (uintptr_t)MR.getResultPointer() + To.addr;
|
||||
|
||||
switch ((PPC::RelocationType)MR.getRelocationType()) {
|
||||
default: assert(0 && "Unknown PPC relocation type!");
|
||||
case PPC::reloc_absolute_low_ix:
|
||||
assert(0 && "Unhandled PPC relocation type!");
|
||||
break;
|
||||
case PPC::reloc_vanilla:
|
||||
{
|
||||
// FIXME: need to handle 64 bit vanilla relocs
|
||||
MachORelocation VANILLA(MR.getMachineCodeOffset(), To.Index, false, 2,
|
||||
isExtern, PPC_RELOC_VANILLA, Scattered,
|
||||
(intptr_t)MR.getResultPointer());
|
||||
++From.nreloc;
|
||||
OutputBuffer RelocOut(From.RelocBuffer, is64Bit, isLittleEndian);
|
||||
OutputBuffer SecOut(From.SectionData, is64Bit, isLittleEndian);
|
||||
|
||||
if (Scattered) {
|
||||
RelocOut.outword(VANILLA.getPackedFields());
|
||||
RelocOut.outword(VANILLA.getAddress());
|
||||
} else {
|
||||
RelocOut.outword(VANILLA.getAddress());
|
||||
RelocOut.outword(VANILLA.getPackedFields());
|
||||
}
|
||||
|
||||
intptr_t SymbolOffset;
|
||||
if (Scattered)
|
||||
SymbolOffset = Addr + MR.getConstantVal();
|
||||
else
|
||||
SymbolOffset = Addr;
|
||||
printf("vanilla fixup: sec_%x[%x] = %x\n", From.Index, unsigned(MR.getMachineCodeOffset()), (unsigned)SymbolOffset);
|
||||
SecOut.fixword(SymbolOffset, MR.getMachineCodeOffset());
|
||||
}
|
||||
break;
|
||||
case PPC::reloc_pcrel_bx:
|
||||
{
|
||||
Addr -= MR.getMachineCodeOffset();
|
||||
Addr >>= 2;
|
||||
Addr &= 0xFFFFFF;
|
||||
Addr <<= 2;
|
||||
Addr |= (From.SectionData[MR.getMachineCodeOffset()] << 24);
|
||||
|
||||
OutputBuffer SecOut(From.SectionData, is64Bit, isLittleEndian);
|
||||
SecOut.fixword(Addr, MR.getMachineCodeOffset());
|
||||
break;
|
||||
}
|
||||
case PPC::reloc_pcrel_bcx:
|
||||
{
|
||||
Addr -= MR.getMachineCodeOffset();
|
||||
Addr &= 0xFFFC;
|
||||
|
||||
OutputBuffer SecOut(From.SectionData, is64Bit, isLittleEndian);
|
||||
SecOut.fixhalf(Addr, MR.getMachineCodeOffset() + 2);
|
||||
break;
|
||||
}
|
||||
case PPC::reloc_absolute_high:
|
||||
{
|
||||
MachORelocation HA16(MR.getMachineCodeOffset(), To.Index, false, 2,
|
||||
isExtern, PPC_RELOC_HA16);
|
||||
MachORelocation PAIR(Addr & 0xFFFF, 0xFFFFFF, false, 2, isExtern,
|
||||
PPC_RELOC_PAIR);
|
||||
++From.nreloc;
|
||||
++From.nreloc;
|
||||
|
||||
OutputBuffer RelocOut(From.RelocBuffer, is64Bit, isLittleEndian);
|
||||
RelocOut.outword(HA16.r_address);
|
||||
RelocOut.outword(HA16.getPackedFields());
|
||||
RelocOut.outword(PAIR.r_address);
|
||||
RelocOut.outword(PAIR.getPackedFields());
|
||||
Addr += 0x8000;
|
||||
|
||||
OutputBuffer SecOut(From.SectionData, is64Bit, isLittleEndian);
|
||||
SecOut.fixhalf(Addr >> 16, MR.getMachineCodeOffset() + 2);
|
||||
break;
|
||||
}
|
||||
case PPC::reloc_absolute_low:
|
||||
{
|
||||
MachORelocation LO16(MR.getMachineCodeOffset(), To.Index, false, 2,
|
||||
isExtern, PPC_RELOC_LO16);
|
||||
MachORelocation PAIR(Addr >> 16, 0xFFFFFF, false, 2, isExtern,
|
||||
PPC_RELOC_PAIR);
|
||||
++From.nreloc;
|
||||
++From.nreloc;
|
||||
|
||||
OutputBuffer RelocOut(From.RelocBuffer, is64Bit, isLittleEndian);
|
||||
RelocOut.outword(LO16.r_address);
|
||||
RelocOut.outword(LO16.getPackedFields());
|
||||
RelocOut.outword(PAIR.r_address);
|
||||
RelocOut.outword(PAIR.getPackedFields());
|
||||
|
||||
OutputBuffer SecOut(From.SectionData, is64Bit, isLittleEndian);
|
||||
SecOut.fixhalf(Addr, MR.getMachineCodeOffset() + 2);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue