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sa_stackused, sa_setstackfree: share some common code.

This commit is contained in:
yamt 2006-06-26 10:21:34 +00:00
parent 0a52064ba3
commit a3b2d62857
1 changed files with 18 additions and 12 deletions
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30
sys/kern/kern_sa.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_sa.c,v 1.81 2006/06/25 08:13:28 yamt Exp $ */
/* $NetBSD: kern_sa.c,v 1.82 2006/06/26 10:21:34 yamt Exp $ */
/*-
* Copyright (c) 2001, 2004, 2005 The NetBSD Foundation, Inc.
@ -40,7 +40,7 @@
#include "opt_ktrace.h"
#include "opt_multiprocessor.h"
__KERNEL_RCSID(0, "$NetBSD: kern_sa.c,v 1.81 2006/06/25 08:13:28 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_sa.c,v 1.82 2006/06/26 10:21:34 yamt Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -280,17 +280,25 @@ sa_release(struct proc *p)
}
}
static int
sa_fetchstackgen(struct sastack *sast, struct sadata *sa, unsigned int *gen)
{
int error;
/* COMPAT_NETBSD32: believe it or not, but the following is ok */
error = copyin(&((struct sa_stackinfo_t *)
((char *)sast->sast_stack.ss_sp +
sa->sa_stackinfo_offset))->sasi_stackgen, gen, sizeof(*gen));
return error;
}
static inline int
sa_stackused(struct sastack *sast, struct sadata *sa)
{
unsigned int gen;
/* COMPAT_NETBSD32: believe it or not, but the following is ok */
if (copyin(&((struct sa_stackinfo_t *)
((char *)sast->sast_stack.ss_sp +
sa->sa_stackinfo_offset))->sasi_stackgen,
&gen, sizeof(unsigned int)) != 0) {
if (sa_fetchstackgen(sast, sa, &gen)) {
#ifdef DIAGNOSTIC
printf("sa_stackused: couldn't copyin sasi_stackgen");
#endif
@ -303,18 +311,16 @@ sa_stackused(struct sastack *sast, struct sadata *sa)
static inline void
sa_setstackfree(struct sastack *sast, struct sadata *sa)
{
unsigned int gen;
/* COMPAT_NETBSD32: believe it or not, but the following is ok */
if (copyin(&((struct sa_stackinfo_t *)
((char *)sast->sast_stack.ss_sp +
sa->sa_stackinfo_offset))->sasi_stackgen,
&sast->sast_gen, sizeof(unsigned int)) != 0) {
if (sa_fetchstackgen(sast, sa, &gen)) {
#ifdef DIAGNOSTIC
printf("sa_setstackfree: couldn't copyin sasi_stackgen");
#endif
sigexit(curlwp, SIGILL);
/* NOTREACHED */
}
sast->sast_gen = gen;
}
/*