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We can't assume syscall retains t0, unless it's documented as ABI.

This commit is contained in:
tsutsui 2010-12-12 09:03:06 +00:00
parent f3f411dad2
commit be1c859466
1 changed files with 3 additions and 2 deletions
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5
lib/libc/arch/mips/sys/sbrk.S
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@ -1,4 +1,4 @@
/* $NetBSD: sbrk.S,v 1.17 2009/12/14 01:07:42 matt Exp $ */
/* $NetBSD: sbrk.S,v 1.18 2010/12/12 09:03:06 tsutsui Exp $ */
/*-
* Copyright (c) 1991, 1993
@ -38,7 +38,7 @@
#if 0
RCSID("from: @(#)sbrk.s 8.1 (Berkeley) 6/4/93")
#else
RCSID("$NetBSD: sbrk.S,v 1.17 2009/12/14 01:07:42 matt Exp $")
RCSID("$NetBSD: sbrk.S,v 1.18 2010/12/12 09:03:06 tsutsui Exp $")
#endif
#endif /* LIBC_SCCS and not lint */
@ -62,6 +62,7 @@ LEAF(_sbrk)
SYSTRAP(break)
bne a3, zero, 1f
move v0, v1 # return old val of curbrk from above
PTR_LA t0, _C_LABEL(__curbrk)
PTR_S a0, 0(t0) # save current val of curbrk from above
PIC_RETURN()
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