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DiscIO: Improve IVolume::Read32 error handling

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Callers can now check whether reads fail, either by checking the return
value or by setting the buffer to a known bad value and seeing if it stays
untouched. I've added error checks to FileSystemGCWii and Boot_BS2Emu,
but not to Boot since it doesn't check any of its other reads either.
This commit is contained in:
JosJuice
2015-10-03 13:24:13 +02:00
parent 2b60eb0e22
commit c7e747d775
6 changed files with 90 additions and 62 deletions
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17
Source/Core/Core/Boot/Boot.cpp
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@ -60,17 +60,18 @@ void CBoot::Load_FST(bool _bIsWii)
if (_bIsWii)
shift = 2;
u32 fstOffset = volume.Read32(0x0424, _bIsWii) << shift;
u32 fstSize = volume.Read32(0x0428, _bIsWii) << shift;
u32 maxFstSize = volume.Read32(0x042c, _bIsWii) << shift;
u32 fst_offset, fst_size, max_fst_size;
volume.ReadSwapped(0x0424, &fst_offset, _bIsWii);
volume.ReadSwapped(0x0428, &fst_size, _bIsWii);
volume.ReadSwapped(0x042c, &max_fst_size, _bIsWii);
u32 arenaHigh = ROUND_DOWN(0x817FFFFF - maxFstSize, 0x20);
Memory::Write_U32(arenaHigh, 0x00000034);
u32 arena_high = ROUND_DOWN(0x817FFFFF - (max_fst_size << shift), 0x20);
Memory::Write_U32(arena_high, 0x00000034);
// load FST
DVDRead(fstOffset, arenaHigh, fstSize, _bIsWii);
Memory::Write_U32(arenaHigh, 0x00000038);
Memory::Write_U32(maxFstSize, 0x0000003c);
DVDRead(fst_offset << shift, arena_high, fst_size << shift, _bIsWii);
Memory::Write_U32(arena_high, 0x00000038);
Memory::Write_U32(max_fst_size << shift, 0x0000003c);
}
void CBoot::UpdateDebugger_MapLoaded()