NetBSD-5.0.2/sys/arch/mips/mips/process_machdep.c
/* $NetBSD: process_machdep.c,v 1.29 2007/03/04 06:00:12 christos Exp $ */
/*
* Copyright (c) 1993 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* From:
* Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel
*/
/*
* Copyright (c) 1994 Adam Glass
* Copyright (c) 1993 Jan-Simon Pendry
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* From:
* Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.29 2007/03/04 06:00:12 christos Exp $");
/*
* This file may seem a bit stylized, but that so that it's easier to port.
* Functions to be implemented here are:
*
* process_read_regs(proc, regs)
* Get the current user-visible register set from the process
* and copy it into the regs structure (<machine/reg.h>).
* The process is stopped at the time read_regs is called.
*
* process_write_regs(proc, regs)
* Update the current register set from the passed in regs
* structure. Take care to avoid clobbering special CPU
* registers or privileged bits in the PSL.
* The process is stopped at the time write_regs is called.
*
* process_sstep(proc)
* Arrange for the process to trap after executing a single instruction.
*
* process_set_pc(proc)
* Set the process's program counter.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/ptrace.h>
#include <mips/reg.h>
#include <mips/regnum.h> /* symbolic register indices */
int
process_read_regs(struct lwp *l, struct reg *regs)
{
memcpy(regs, l->l_md.md_regs, sizeof(struct reg));
return 0;
}
int
process_write_regs(struct lwp *l, const struct reg *regs)
{
struct frame *f;
mips_reg_t sr;
f = (struct frame *) l->l_md.md_regs;
sr = f->f_regs[_R_SR];
memcpy(l->l_md.md_regs, regs, sizeof(struct reg));
f->f_regs[_R_SR] = sr;
return 0;
}
int
process_read_fpregs(struct lwp *l, struct fpreg *regs)
{
if ((l->l_md.md_flags & MDP_FPUSED) && l == fpcurlwp)
savefpregs(l);
memcpy(regs, &l->l_addr->u_pcb.pcb_fpregs, sizeof(struct fpreg));
return 0;
}
int
process_write_fpregs(struct lwp *l, const struct fpreg *regs)
{
/* to load FPA contents next time when FP insn is executed */
if ((l->l_md.md_flags & MDP_FPUSED) && l == fpcurlwp)
fpcurlwp = NULL;
memcpy(&l->l_addr->u_pcb.pcb_fpregs, regs, sizeof(struct fpreg));
return 0;
}
int
process_sstep(struct lwp *l, int sstep)
{
/* XXX what are the correct semantics: sstep once, or forevermore? */
if (sstep)
mips_singlestep(l);
return 0;
}
int
process_set_pc(struct lwp *l, void *addr)
{
((struct frame *)l->l_md.md_regs)->f_regs[_R_PC] = (intptr_t)addr;
return 0;
}