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Fixed bug: after BRA instruction was optimized away the variable lastbra
pointed to the instruction following. This could lead to anything,
including bus errors. Lastbra is now reset to 0.
Bug discovered at Philips PMDS by Hans de Vries. The fix is also his.
Actually the function cleaninstr should be rewritten.

sater 40 年之前
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共有 1 个文件被更改,包括 1 次插入0 次删除
  1. 1 0
      util/opt/flow.c

+ 1 - 0
util/opt/flow.c

@@ -97,6 +97,7 @@ cleaninstrs() {
 					OPTIM(O_BRALAB);
 					lpp = lastbra;
 					*lpp = lp;
+					lastbra = (line_p *) 0;
 					lp->l_a.la_np->n_jumps--;
 				}
 			}