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in copystr(), be sure to return an error if maxlen == 0.

This commit is contained in:
chs 1999-11-07 17:01:20 +00:00
parent 1ad621b38f
commit f1c14a8b5d
1 changed files with 6 additions and 4 deletions
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10
sys/arch/alpha/alpha/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.67 1999/11/01 22:41:55 thorpej Exp $ */ /* $NetBSD: locore.s,v 1.68 1999/11/07 17:01:20 chs Exp $ */
/*- /*-
* Copyright (c) 1999 The NetBSD Foundation, Inc. * Copyright (c) 1999 The NetBSD Foundation, Inc.
@ -76,7 +76,7 @@
#include <machine/asm.h> #include <machine/asm.h>
__KERNEL_RCSID(0, "$NetBSD: locore.s,v 1.67 1999/11/01 22:41:55 thorpej Exp $"); __KERNEL_RCSID(0, "$NetBSD: locore.s,v 1.68 1999/11/07 17:01:20 chs Exp $");
#ifndef EVCNT_COUNTERS #ifndef EVCNT_COUNTERS
#include <machine/intrcnt.h> #include <machine/intrcnt.h>
@ -1077,7 +1077,9 @@ LEAF(copystr, 4)
LDGP(pv) LDGP(pv)
mov a2, t0 /* t0 = i = len */ mov a2, t0 /* t0 = i = len */
beq a2, 2f /* if (len == 0), bail out */ bne a2, 1f /* if (len != 0), proceed */
ldiq t1, 1 /* else bail */
br zero, 2f
1: ldq_u t1, 0(a0) /* t1 = *from */ 1: ldq_u t1, 0(a0) /* t1 = *from */
extbl t1, a0, t1 extbl t1, a0, t1
@ -1098,7 +1100,7 @@ LEAF(copystr, 4)
stq t0, 0(a3) stq t0, 0(a3)
3: beq t1, 4f /* *from == '\0'; leave quietly */ 3: beq t1, 4f /* *from == '\0'; leave quietly */
ldiq v0, ENAMETOOLONG /* *from != '\0'; error. */ ldiq v0, ENAMETOOLONG /* *from != '\0'; error. */
RET RET
4: mov zero, v0 /* return 0. */ 4: mov zero, v0 /* return 0. */