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Assorted fixes -> ARM executes.

This commit is contained in:
Christian Speckner 2024-07-27 22:48:27 +02:00
parent a7731198e2
commit e0ce387c9f
3 changed files with 28 additions and 16 deletions
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2
src/emucore/CartELF.cxx
View File

@ -456,7 +456,7 @@ void CartridgeELF::jumpToMain()
.setRegister(0, sp )
.setRegister(13, sp)
.setRegister(14, RETURN_ADDR_MAIN)
.setRegister(15, myArmEntrypoint);
.setPc(myArmEntrypoint);
}
void CartridgeELF::runArm()

39
src/emucore/CortexM0.cxx
View File

@ -553,10 +553,6 @@ CortexM0& CortexM0::mapRegionCode(uInt32 pageBase,
region.access.accessCode.backingStore = backingStore;
region.access.accessCode.ops = static_cast<uInt8*>(std::malloc((pageCount * PAGE_SIZE) >> 1));
for (size_t i = 0; i < pageCount * PAGE_SIZE; i += 2)
region.access.accessCode.ops[i >> 1] =
decodeInstructionWord(READ16(backingStore, i));
return *this;
}
@ -583,9 +579,16 @@ CortexM0& CortexM0::reset()
reg_norm.fill(0);
znFlags = cFlag = vFlag = 0;
recompileCodeRegions();
return *this;
}
CortexM0& CortexM0::setPc(uInt32 pc)
{
return setRegister(15, (pc & ~1) + 2);
}
CortexM0& CortexM0::setRegister(uInt8 regno, uInt32 value)
{
write_register(regno, value);
@ -610,7 +613,7 @@ CortexM0::err_t CortexM0::run(uInt32 maxCycles, uInt32& cycles)
uInt16 inst;
uInt8 op;
err_t err = fetch16(pc -2, inst, op);
err_t err = fetch16(pc - 2, inst, op);
if (err) return err;
@ -650,6 +653,17 @@ CortexM0::MemoryRegion& CortexM0::setupMapping(uInt32 pageBase, uInt32 pageCount
return region;
}
void CortexM0::recompileCodeRegions()
{
for (const auto& region: myRegions) {
if (region.type != MemoryRegionType::directCode) continue;
for (size_t i = 0; i < region.size; i += 2)
region.access.accessCode.ops[i >> 1] =
decodeInstructionWord(READ16(region.access.accessCode.backingStore, i));
}
}
CortexM0::err_t CortexM0::read32(uInt32 address, uInt32& value)
{
if (address & 0x03) return errIntrinsic(ERR_ACCESS_ALIGNMENT_FAULT, address);
@ -1176,7 +1190,7 @@ CortexM0::err_t CortexM0::execute(uInt16 inst, uInt8 op)
}
case Op::bkpt:
return errIntrinsic(ERR_BKPT, read_register(15) - 2);
return errIntrinsic(ERR_BKPT, read_register(15) - 4);
//BL/BLX(1) variants
// (bl, blx_thumb)
@ -1216,7 +1230,7 @@ CortexM0::err_t CortexM0::execute(uInt16 inst, uInt8 op)
write_register(15, rc);
return ERR_NONE;
}
else return errIntrinsic(ERR_INVALID_OPERATING_MODE, read_register(15) - 2);
else return errIntrinsic(ERR_INVALID_OPERATING_MODE, read_register(15) - 4);
}
//BX
@ -1233,7 +1247,7 @@ CortexM0::err_t CortexM0::execute(uInt16 inst, uInt8 op)
write_register(15, rc);
return ERR_NONE;
}
else return errIntrinsic(ERR_INVALID_OPERATING_MODE, read_register(15) - 2);
else return errIntrinsic(ERR_INVALID_OPERATING_MODE, read_register(15) - 4);
}
//CMN
@ -1864,11 +1878,6 @@ CortexM0::err_t CortexM0::execute(uInt16 inst, uInt8 op)
rc = read_register(14);
const err_t err = write32(rd, rc);
if (err) return err;
if((rc & 1) == 0)
{
return errIntrinsic(ERR_INVALID_OPERATING_MODE, read_register(15) - 2);
}
}
write_register(13, sp);
return ERR_NONE;
@ -1966,7 +1975,7 @@ CortexM0::err_t CortexM0::execute(uInt16 inst, uInt8 op)
#ifndef UNSAFE_OPTIMIZATIONS
//SETEND
case Op::setend: {
return errIntrinsic(ERR_UNIMPLEMENTED_INST, read_register(15) - 2);
return errIntrinsic(ERR_UNIMPLEMENTED_INST, read_register(15) - 4);
}
#endif
@ -2235,6 +2244,6 @@ CortexM0::err_t CortexM0::execute(uInt16 inst, uInt8 op)
}
default:
return errIntrinsic(ERR_UNDEFINED_INST, read_register(15) - 2);
return errIntrinsic(ERR_UNDEFINED_INST, read_register(15) - 4);
}
}

3
src/emucore/CortexM0.hxx
View File

@ -104,6 +104,7 @@ class CortexM0
CortexM0& mapDefault(BusTransactionDelegate* delegate);
CortexM0& reset();
CortexM0& setPc(uInt32 pc);
CortexM0& setRegister(uInt8 regno, uInt32 value);
uInt32 getRegister(uInt32 regno);
@ -168,6 +169,8 @@ class CortexM0
MemoryRegion& setupMapping(uInt32 pageBase, uInt32 pageCount,
bool readOnly, MemoryRegionType type);
void recompileCodeRegions();
err_t fetch16(uInt32 address, uInt16& value, uInt8& op);
void do_cvflag(uInt32 a, uInt32 b, uInt32 c);