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Add range checks to ET4000/W32p VRAM read/write functions.

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This commit is contained in:
TomW 2015-10-31 18:23:39 +00:00
commit 36793f18db
1 changed files with 7 additions and 2 deletions
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9
src/vid_et4000w32.c
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@ -379,8 +379,11 @@ void et4000w32p_mmu_write(uint32_t addr, uint8_t val, void *p)
} }
else else
{ {
svga->vram[(addr & 0x1fff) + et4000->mmu.base[bank]] = val; if ((addr&0x1fff) + et4000->mmu.base[bank] < svga->vram_limit)
svga->changedvram[((addr & 0x1fff) + et4000->mmu.base[bank]) >> 12] = changeframecount; {
svga->vram[(addr & 0x1fff) + et4000->mmu.base[bank]] = val;
svga->changedvram[((addr & 0x1fff) + et4000->mmu.base[bank]) >> 12] = changeframecount;
}
} }
break; break;
case 0x6000: case 0x6000:
@ -483,6 +486,8 @@ uint8_t et4000w32p_mmu_read(uint32_t addr, void *p)
/*???*/ /*???*/
return temp; return temp;
} }
if ((addr&0x1fff) + et4000->mmu.base[bank] >= svga->vram_limit)
return 0xff;
return svga->vram[(addr&0x1fff) + et4000->mmu.base[bank]]; return svga->vram[(addr&0x1fff) + et4000->mmu.base[bank]];
case 0x6000: case 0x6000: