NetBSD-5.0.2/sys/arch/sparc/sparc/process_machdep.c
/* $NetBSD: process_machdep.c,v 1.14 2007/03/04 06:00:46 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) 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
*/
/*
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.14 2007/03/04 06:00:46 christos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/vnode.h>
#include <machine/psl.h>
#include <machine/reg.h>
#include <machine/frame.h>
#include <sys/ptrace.h>
int
process_read_regs(struct lwp *p, struct reg *regs)
{
/* NOTE: struct reg == struct trapframe */
bcopy(p->l_md.md_tf, (void *)regs, sizeof(struct reg));
return (0);
}
int
process_write_regs(struct lwp *p, const struct reg *regs)
{
int psr = p->l_md.md_tf->tf_psr & ~PSR_ICC;
bcopy(regs, p->l_md.md_tf, sizeof(struct reg));
p->l_md.md_tf->tf_psr = psr | (regs->r_psr & PSR_ICC);
return (0);
}
int
process_sstep(struct lwp *p, int sstep)
{
if (sstep)
return (EINVAL);
return (0);
}
int
process_set_pc(struct lwp *p, void *addr)
{
p->l_md.md_tf->tf_pc = (u_int)addr;
p->l_md.md_tf->tf_npc = (u_int)addr + 4;
return (0);
}
int
process_read_fpregs(struct lwp *p, struct fpreg *regs)
{
extern struct fpstate initfpstate;
struct fpstate *statep = &initfpstate;
/* NOTE: struct fpreg == prefix of struct fpstate */
if (p->l_md.md_fpstate)
statep = p->l_md.md_fpstate;
bcopy(statep, regs, sizeof(struct fpreg));
return (0);
}
int
process_write_fpregs(struct lwp *p, const struct fpreg *regs)
{
if (p->l_md.md_fpstate == NULL)
return (EINVAL);
/* Write new values to the FP registers */
bcopy(regs, p->l_md.md_fpstate, sizeof(struct fpreg));
/* Reset FP queue in this process `fpstate' */
p->l_md.md_fpstate->fs_qsize = 0;
return (0);
}