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In setregs() flush sigreturn trampoline code from the d (MIPS3) and i cache. 

Tested on geocast RM5231 platform.  This fixes a race in
regress/sys/kern/sigtramp.  Some other ports do the same thing.
This commit is contained in:
jeffs 2000-07-10 21:12:13 +00:00
parent 27a5ba9e0a
commit 010c198b37
1 changed files with 12 additions and 2 deletions
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14
sys/arch/mips/mips/mips_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: mips_machdep.c,v 1.92 2000/06/29 08:11:27 mrg Exp $ */
/* $NetBSD: mips_machdep.c,v 1.93 2000/07/10 21:12:13 jeffs Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -52,7 +52,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: mips_machdep.c,v 1.92 2000/06/29 08:11:27 mrg Exp $");
__KERNEL_RCSID(0, "$NetBSD: mips_machdep.c,v 1.93 2000/07/10 21:12:13 jeffs Exp $");
#include "opt_compat_netbsd.h"
#include "opt_compat_ultrix.h"
@ -655,8 +655,18 @@ setregs(p, pack, stack)
struct exec_package *pack;
u_long stack;
{
int szsigcode = pack->ep_emul->e_esigcode - pack->ep_emul->e_sigcode;
struct frame *f = (struct frame *)p->p_md.md_regs;
/*
* Make sure sigreturn trampoline is coherent.
*/
#ifdef MIPS3
if (CPUISMIPS3)
MachFlushDCache((vaddr_t)p->p_sigacts->ps_sigcode, szsigcode);
#endif
MachFlushICache((vaddr_t)p->p_sigacts->ps_sigcode, szsigcode);
memset(f, 0, sizeof(struct frame));
f->f_regs[SP] = (int) stack;
f->f_regs[PC] = (int) pack->ep_entry & ~3;