mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-30 21:29:28 +00:00
This adds location info for all llvm_unreachable calls (which is a macro now) in !NDEBUG builds. In NDEBUG builds location info and the message is off (it only prints "UREACHABLE executed"). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75640 91177308-0d34-0410-b5e6-96231b3b80d8
153 lines
5.4 KiB
C++
153 lines
5.4 KiB
C++
//===-- PPCMachOWriterInfo.cpp - Mach-O Writer Info for the PowerPC -------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements Mach-O writer information for the PowerPC backend.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "PPCMachOWriterInfo.h"
|
|
#include "PPCRelocations.h"
|
|
#include "PPCTargetMachine.h"
|
|
#include "llvm/CodeGen/MachORelocation.h"
|
|
#include "llvm/Support/OutputBuffer.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include <cstdio>
|
|
using namespace llvm;
|
|
|
|
PPCMachOWriterInfo::PPCMachOWriterInfo(const PPCTargetMachine &TM)
|
|
: TargetMachOWriterInfo(TM.getTargetData()->getPointerSizeInBits() == 64 ?
|
|
HDR_CPU_TYPE_POWERPC64 :
|
|
HDR_CPU_TYPE_POWERPC,
|
|
HDR_CPU_SUBTYPE_POWERPC_ALL) {}
|
|
PPCMachOWriterInfo::~PPCMachOWriterInfo() {}
|
|
|
|
/// 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.
|
|
unsigned PPCMachOWriterInfo::GetTargetRelocation(MachineRelocation &MR,
|
|
unsigned FromIdx,
|
|
unsigned ToAddr,
|
|
unsigned ToIdx,
|
|
OutputBuffer &RelocOut,
|
|
OutputBuffer &SecOut,
|
|
bool Scattered,
|
|
bool isExtern) const {
|
|
unsigned NumRelocs = 0;
|
|
uint64_t Addr = 0;
|
|
|
|
// Get the address of whatever it is we're relocating, if possible.
|
|
if (!isExtern)
|
|
Addr = (uintptr_t)MR.getResultPointer() + ToAddr;
|
|
|
|
switch ((PPC::RelocationType)MR.getRelocationType()) {
|
|
default: llvm_unreachable("Unknown PPC relocation type!");
|
|
case PPC::reloc_absolute_low_ix:
|
|
llvm_unreachable("Unhandled PPC relocation type!");
|
|
break;
|
|
case PPC::reloc_vanilla:
|
|
{
|
|
// FIXME: need to handle 64 bit vanilla relocs
|
|
MachORelocation VANILLA(MR.getMachineCodeOffset(), ToIdx,
|
|
false, 2, isExtern,
|
|
PPC_RELOC_VANILLA,
|
|
Scattered, (intptr_t)MR.getResultPointer());
|
|
++NumRelocs;
|
|
|
|
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", FromIdx,
|
|
unsigned(MR.getMachineCodeOffset()),
|
|
unsigned(SymbolOffset));
|
|
SecOut.fixword(SymbolOffset, MR.getMachineCodeOffset());
|
|
}
|
|
break;
|
|
case PPC::reloc_pcrel_bx:
|
|
{
|
|
// FIXME: Presumably someday we will need to branch to other, non-extern
|
|
// functions too. Need to figure out some way to distinguish between
|
|
// target is BB and target is function.
|
|
if (isExtern) {
|
|
MachORelocation BR24(MR.getMachineCodeOffset(), ToIdx, true, 2,
|
|
isExtern, PPC_RELOC_BR24, Scattered,
|
|
(intptr_t)MR.getMachineCodeOffset());
|
|
RelocOut.outword(BR24.getAddress());
|
|
RelocOut.outword(BR24.getPackedFields());
|
|
++NumRelocs;
|
|
}
|
|
|
|
Addr -= MR.getMachineCodeOffset();
|
|
Addr >>= 2;
|
|
Addr &= 0xFFFFFF;
|
|
Addr <<= 2;
|
|
Addr |= (SecOut[MR.getMachineCodeOffset()] << 24);
|
|
Addr |= (SecOut[MR.getMachineCodeOffset()+3] & 0x3);
|
|
SecOut.fixword(Addr, MR.getMachineCodeOffset());
|
|
break;
|
|
}
|
|
case PPC::reloc_pcrel_bcx:
|
|
{
|
|
Addr -= MR.getMachineCodeOffset();
|
|
Addr &= 0xFFFC;
|
|
|
|
SecOut.fixhalf(Addr, MR.getMachineCodeOffset() + 2);
|
|
break;
|
|
}
|
|
case PPC::reloc_absolute_high:
|
|
{
|
|
MachORelocation HA16(MR.getMachineCodeOffset(), ToIdx, false, 2,
|
|
isExtern, PPC_RELOC_HA16);
|
|
MachORelocation PAIR(Addr & 0xFFFF, 0xFFFFFF, false, 2, isExtern,
|
|
PPC_RELOC_PAIR);
|
|
NumRelocs = 2;
|
|
|
|
RelocOut.outword(HA16.getRawAddress());
|
|
RelocOut.outword(HA16.getPackedFields());
|
|
RelocOut.outword(PAIR.getRawAddress());
|
|
RelocOut.outword(PAIR.getPackedFields());
|
|
|
|
Addr += 0x8000;
|
|
|
|
SecOut.fixhalf(Addr >> 16, MR.getMachineCodeOffset() + 2);
|
|
break;
|
|
}
|
|
case PPC::reloc_absolute_low:
|
|
{
|
|
MachORelocation LO16(MR.getMachineCodeOffset(), ToIdx, false, 2,
|
|
isExtern, PPC_RELOC_LO16);
|
|
MachORelocation PAIR(Addr >> 16, 0xFFFFFF, false, 2, isExtern,
|
|
PPC_RELOC_PAIR);
|
|
NumRelocs = 2;
|
|
|
|
RelocOut.outword(LO16.getRawAddress());
|
|
RelocOut.outword(LO16.getPackedFields());
|
|
RelocOut.outword(PAIR.getRawAddress());
|
|
RelocOut.outword(PAIR.getPackedFields());
|
|
|
|
SecOut.fixhalf(Addr, MR.getMachineCodeOffset() + 2);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return NumRelocs;
|
|
}
|