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In copy*str(), explicitly check for maxlen==0, rather than implicitly making it 

act like 2^32.

Tested by: simonb
This commit is contained in:
mycroft 1999-11-03 16:21:22 +00:00
parent f13d3f5b3b
commit b2ecb4ad21
1 changed files with 7 additions and 1 deletions
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8
sys/arch/mips/mips/locore.S
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@ -1,4 +1,4 @@
/* $NetBSD: locore.S,v 1.77 1999/09/25 00:00:38 shin Exp $ */
/* $NetBSD: locore.S,v 1.78 1999/11/03 16:21:22 mycroft Exp $ */
/*
* Copyright (c) 1992, 1993
@ -560,6 +560,7 @@ END(_splnone)
*/
LEAF(copystr)
move t0, a2
beq a2, zero, 4f
1:
lbu v0, 0(a0)
subu a2, a2, 1
@ -568,6 +569,7 @@ LEAF(copystr)
addu a0, a0, 1
bne a2, zero, 1b # less than maxlen
addu a1, a1, 1
4:
li v0, ENAMETOOLONG # run out of space
2:
beq a3, zero, 3f # return num. of copied bytes
@ -591,6 +593,7 @@ LEAF(copyinstr)
blt a0, zero, _C_LABEL(copystrerr)
sw v0, U_PCB_ONFAULT(v1)
move t0, a2
beq a2, zero, 4f
1:
lbu v0, 0(a0)
subu a2, a2, 1
@ -599,6 +602,7 @@ LEAF(copyinstr)
addu a0, a0, 1
bne a2, zero, 1b
addu a1, a1, 1
4:
li v0, ENAMETOOLONG
2:
beq a3, zero, 3f
@ -622,6 +626,7 @@ LEAF(copyoutstr)
blt a1, zero, _C_LABEL(copystrerr)
sw v0, U_PCB_ONFAULT(v1)
move t0, a2
beq a2, zero, 4f
1:
lbu v0, 0(a0)
subu a2, a2, 1
@ -630,6 +635,7 @@ LEAF(copyoutstr)
addu a0, a0, 1
bne a2, zero, 1b
addu a1, a1, 1
4:
li v0, ENAMETOOLONG
2:
beq a3, zero, 3f