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(uxn.c) Unallow LDR/STR to reach outside of ram
Devine Lu Linvega authored on 13/01/2023 02:47:19
Showing 1 changed files
| ... | ... |
@@ -75,8 +75,8 @@ uxn_eval(Uxn *u, Uint16 pc) |
| 75 | 75 |
case 0x0f: /* STH */ POP(a) PUSH(dst, a) break; |
| 76 | 76 |
case 0x10: /* LDZ */ POP8(a) PEEK(b, a) PUSH(src, b) break; |
| 77 | 77 |
case 0x11: /* STZ */ POP8(a) POP(b) POKE(a, b) break; |
| 78 |
- case 0x12: /* LDR */ POP8(a) PEEK(b, pc + (Sint8)a) PUSH(src, b) break; |
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| 79 |
- case 0x13: /* STR */ POP8(a) POP(b) c = pc + (Sint8)a; POKE(c, b) break; |
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| 78 |
+ case 0x12: /* LDR */ POP8(a) PEEK(b, pc + (Sint8)a & 0xffff) PUSH(src, b) break; |
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| 79 |
+ case 0x13: /* STR */ POP8(a) POP(b) c = pc + (Sint8)a & 0xffff; POKE(c, b) break; |
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| 80 | 80 |
case 0x14: /* LDA */ POP16(a) PEEK(b, a) PUSH(src, b) break; |
| 81 | 81 |
case 0x15: /* STA */ POP16(a) POP(b) POKE(a, b) break; |
| 82 | 82 |
case 0x16: /* DEI */ POP8(a) DEVR(b, a) PUSH(src, b) break; |