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Simplify the stack filling code when using the STACKCHECKS option.

This commit is contained in:
mark 1998-06-02 14:34:55 +00:00
parent 86d96336f3
commit 9a4b24a02a
1 changed files with 10 additions and 15 deletions
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25
sys/arch/arm32/arm32/vm_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: vm_machdep.c,v 1.22 1998/05/01 15:36:30 mark Exp $ */
/* $NetBSD: vm_machdep.c,v 1.23 1998/06/02 14:34:55 mark Exp $ */
/*
* Copyright (c) 1994-1998 Mark Brinicombe.
@ -88,8 +88,11 @@ extern void child_return __P((void));
pt_entry_t *pmap_pte __P((pmap_t, vm_offset_t));
/*
* Special compilation symbols
* STACKCHECKS
* Special compilation symbols:
*
* STACKCHECKS - Fill undefined and supervisor stacks with a known pattern
* on forking and check the pattern on exit, reporting
* the amount of stack used.
*/
/*
@ -110,10 +113,6 @@ cpu_fork(p1, p2)
struct pcb *pcb = (struct pcb *)&p2->p_addr->u_pcb;
struct trapframe *tf;
struct switchframe *sf;
#ifdef STACKCHECKS
int loop;
u_char *ptr;
#endif /* STACKCHECKS */
#ifdef PMAP_DEBUG
if (pmap_debug_level >= 0)
@ -137,14 +136,11 @@ cpu_fork(p1, p2)
#ifdef STACKCHECKS
/* Fill the undefined stack with a known pattern */
ptr = ((u_char *)p2->p_addr) + USPACE_UNDEF_STACK_BOTTOM;
for (loop = 0; loop < (USPACE_UNDEF_STACK_TOP - USPACE_UNDEF_STACK_BOTTOM); ++loop, ++ptr)
*ptr = 0xdd;
memset(((u_char *)p2->p_addr) + USPACE_UNDEF_STACK_BOTTOM, 0xdd,
(USPACE_UNDEF_STACK_TOP - USPACE_UNDEF_STACK_BOTTOM));
/* Fill the kernel stack with a known pattern */
ptr = ((u_char *)p2->p_addr) + USPACE_SVC_STACK_BOTTOM;
for (loop = 0; loop < (USPACE_SVC_STACK_TOP - USPACE_SVC_STACK_BOTTOM); ++loop, ++ptr)
*ptr = 0xdd;
memset(((u_char *)p2->p_addr) + USPACE_SVC_STACK_BOTTOM, 0xdd,
(USPACE_SVC_STACK_TOP - USPACE_SVC_STACK_BOTTOM));
#endif /* STACKCHECKS */
#ifdef PMAP_DEBUG
@ -223,7 +219,6 @@ cpu_exit(p)
for (loop = 0; loop < (USPACE_SVC_STACK_TOP - USPACE_SVC_STACK_BOTTOM)
&& *ptr == 0xdd; ++loop, ++ptr) ;
log(LOG_INFO, "%d bytes of svc stack fill pattern\n", loop);
}
#endif /* STACKCHECKS */