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Do not use lwp_trampoline for cpu_setfunc, but a simplified setfunc_trampoline 

that does not call lwp_startup() instead.
This commit is contained in:
martin 2009-06-01 20:58:16 +00:00
parent da6eeb0e4d
commit 476755a88c
3 changed files with 31 additions and 10 deletions
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14
sys/arch/alpha/alpha/locore.s
View File

@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.113 2008/04/28 20:23:10 martin Exp $ */
/* $NetBSD: locore.s,v 1.114 2009/06/01 20:58:16 martin Exp $ */
/*-
* Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
@ -67,7 +67,7 @@
#include <machine/asm.h>
__KERNEL_RCSID(0, "$NetBSD: locore.s,v 1.113 2008/04/28 20:23:10 martin Exp $");
__KERNEL_RCSID(0, "$NetBSD: locore.s,v 1.114 2009/06/01 20:58:16 martin Exp $");
#include "assym.h"
@ -748,6 +748,16 @@ LEAF_NOPROFILE(lwp_trampoline, 0)
jmp zero, (pv)
END(lwp_trampoline)
/*
* Simplified version of above: don't call lwp_startup()
*/
LEAF_NOPROFILE(setfunc_trampoline, 0)
mov s0, pv
mov s1, ra
mov s2, a0
jmp zero, (pv)
END(setfunc_trampoline)
/**************************************************************************/
/*

24
sys/arch/alpha/alpha/vm_machdep.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: vm_machdep.c,v 1.99 2009/03/16 23:11:09 dsl Exp $ */
/* $NetBSD: vm_machdep.c,v 1.100 2009/06/01 20:58:16 martin Exp $ */
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@ -29,7 +29,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.99 2009/03/16 23:11:09 dsl Exp $");
__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.100 2009/06/01 20:58:16 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -85,6 +85,7 @@ cpu_lwp_fork(struct lwp *l1, struct lwp *l2, void *stack, size_t stacksize,
void (*func)(void *), void *arg)
{
struct user *up = l2->l_addr;
extern void lwp_trampoline(void);
l2->l_md.md_tf = l1->l_md.md_tf;
l2->l_md.md_flags = l1->l_md.md_flags & (MDP_FPUSED | MDP_FP_C);
@ -150,7 +151,19 @@ cpu_lwp_fork(struct lwp *l1, struct lwp *l2, void *stack, size_t stacksize,
l2tf->tf_regs[FRAME_A3] = 0; /* no error */
l2tf->tf_regs[FRAME_A4] = 1; /* is child */
cpu_setfunc(l2, func, arg);
up = l2->l_addr;
up->u_pcb.pcb_hw.apcb_ksp =
(u_int64_t)l2->l_md.md_tf;
up->u_pcb.pcb_context[0] =
(u_int64_t)func; /* s0: pc */
up->u_pcb.pcb_context[1] =
(u_int64_t)exception_return; /* s1: ra */
up->u_pcb.pcb_context[2] =
(u_int64_t)arg; /* s2: arg */
up->u_pcb.pcb_context[3] =
(u_int64_t)l2; /* s3: lwp */
up->u_pcb.pcb_context[7] =
(u_int64_t)lwp_trampoline; /* ra: assembly magic */
}
}
@ -158,6 +171,7 @@ void
cpu_setfunc(struct lwp *l, void (*func)(void *), void *arg)
{
struct user *up = l->l_addr;
extern void setfunc_trampoline(void);
up->u_pcb.pcb_hw.apcb_ksp =
(u_int64_t)l->l_md.md_tf;
@ -167,10 +181,8 @@ cpu_setfunc(struct lwp *l, void (*func)(void *), void *arg)
(u_int64_t)exception_return; /* s1: ra */
up->u_pcb.pcb_context[2] =
(u_int64_t)arg; /* s2: arg */
up->u_pcb.pcb_context[3] =
(u_int64_t)l; /* s3: lwp */
up->u_pcb.pcb_context[7] =
(u_int64_t)lwp_trampoline; /* ra: assembly magic */
(u_int64_t)setfunc_trampoline; /* ra: assembly magic */
}
/*

3
sys/arch/alpha/include/alpha.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: alpha.h,v 1.23 2007/11/28 17:40:03 ad Exp $ */
/* $NetBSD: alpha.h,v 1.24 2009/06/01 20:58:16 martin Exp $ */
/*
* Copyright (c) 1982, 1990, 1993
@ -139,7 +139,6 @@ void hwrpb_restart_setup(void);
void regdump(struct trapframe *);
void regtoframe(const struct reg *, struct trapframe *);
void savectx(struct pcb *);
void lwp_trampoline(void); /* MAGIC */
void trap(unsigned long, unsigned long, unsigned long, unsigned long,
struct trapframe *);
void trap_init(void);