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cmd/5l: use guaranteed undefined instruction for UNDEF to match [68]l.

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R=golang-dev, dave, rsc
CC=golang-dev
https://golang.org/cl/10085050
This commit is contained in:
Shenghou Ma 2013-06-11 02:02:42 +08:00
parent bb6e265fed
commit ed6dce6f9d
1 changed files with 3 additions and 5 deletions
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8
src/cmd/5l/asm.c
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@ -1515,11 +1515,9 @@ if(debug['G']) print("%ux: %s: arm %d\n", (uint32)(p->pc), p->from.sym->name, p-
// This is supposed to be something that stops execution.
// It's not supposed to be reached, ever, but if it is, we'd
// like to be able to tell how we got there. Assemble as
// BL $0
// TODO: Use addrel.
v = (0 - pc) - 8;
o1 = opbra(ABL, C_SCOND_NONE);
o1 |= (v >> 2) & 0xffffff;
// 0xf7fabcfd which is guranteed to raise undefined instruction
// exception.
o1 = 0xf7fabcfd;
break;
case 97: /* CLZ Rm, Rd */
o1 = oprrr(p->as, p->scond);