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Add some logging for duplicate HI16/LO16 relocs.

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Unknown W. Brackets 2013-06-01 09:12:31 -07:00
parent 23fabb3455
commit a42f80ed55
1 changed files with 12 additions and 4 deletions
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16
Core/HLE/sceKernelModule.cpp
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@ -303,7 +303,8 @@ void WriteVarSymbol(u32 exportAddress, u32 relocAddress, u8 type)
{
static u32 lastHI16RelocAddress = 0;
static u32 lastHI16ExportAddress = 0;
static u32 lastHI16Processed = 0;
static bool lastHI16Processed = false;
static u32 lastHILO16Address = 0;
u32 relocData = Memory::Read_Instruction(relocAddress);
@ -328,11 +329,14 @@ void WriteVarSymbol(u32 exportAddress, u32 relocAddress, u8 type)
*/
case R_MIPS_HI16:
if (lastHI16Processed)
WARN_LOG_REPORT(LOADER, "Unsafe unpaired HI16 variable relocation @ %08x / %08x", lastHI16RelocAddress, relocAddress);
// After this will be an R_MIPS_LO16. If that addition overflows, we need to account for it in HI16.
// The R_MIPS_LO16 and R_MIPS_HI16 will often be *different* relocAddress values.
lastHI16RelocAddress = relocAddress;
lastHI16ExportAddress = exportAddress;
lastHI16Processed = 0;
lastHI16Processed = false;
break;
case R_MIPS_LO16:
@ -347,16 +351,20 @@ void WriteVarSymbol(u32 exportAddress, u32 relocAddress, u8 type)
// Sign extend the existing low value (e.g. from addiu.)
u32 full = (relocDataHi << 16) + (s16)(u16)(relocData & 0xFFFF) + exportAddress;
if(!lastHI16Processed){
if (!lastHI16Processed)
{
// The low instruction will be a signed add, which means (full & 0x8000) will subtract.
// We add 1 in that case so that it ends up the right value.
u16 high = (full >> 16) + ((full & 0x8000) ? 1 : 0);
Memory::Write_U32((relocDataHi & ~0xFFFF) | high, lastHI16RelocAddress);
lastHI16Processed = 1;
lastHI16Processed = true;
}
else if (lastHILO16Address != full)
WARN_LOG_REPORT(LOADER, "Potentially unsafe unpaired LO16 variable relocation @ %08x / %08x", lastHI16RelocAddress, relocAddress);
// And then this is the low relocation, hurray.
relocData = (relocData & ~0xFFFF) | (full & 0xFFFF);
lastHILO16Address = full;
}
break;