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/* $OpenBSD: process_machdep.c,v 1.3 2020/07/10 18:30:28 kettenis Exp $ */
/* $NetBSD: process_machdep.c,v 1.1 1996/09/30 16:34:53 ws Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* 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 TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/ptrace.h>
#include <sys/user.h>
#include <machine/fpu.h>
#include <machine/pcb.h>
#include <machine/psl.h>
#include <machine/reg.h>
int
process_read_regs(struct proc *p, struct reg *regs)
{
struct trapframe *tf = p->p_md.md_regs;
memcpy(regs->r_reg, tf->fixreg, sizeof(regs->r_reg));
regs->r_lr = tf->lr;
regs->r_cr = tf->cr;
regs->r_xer = tf->xer;
regs->r_ctr = tf->ctr;
regs->r_pc = tf->srr0;
regs->r_msr = tf->srr1;
regs->r_vrsave = tf->vrsave;
return 0;
}
int
process_read_fpregs(struct proc *p, struct fpreg *regs)
{
#if 0
struct cpu_info *ci = curcpu();
struct pcb *pcb = &p->p_addr->u_pcb;
if (!(pcb->pcb_flags & PCB_FPU)) {
bzero(regs->fpr, sizeof(regs->fpr));
regs->fpscr = 0;
} else {
/* XXX What if the state is on the other cpu? */
if (p == ci->ci_fpuproc)
save_fpu();
bcopy(pcb->pcb_fpu.fpr, regs->fpr, sizeof(regs->fpr));
regs->fpscr = *(u_int64_t *)&pcb->pcb_fpu.fpcsr;
}
#endif
return 0;
}
#ifdef PTRACE
/*
* Set the process's program counter.
*/
int
process_set_pc(struct proc *p, caddr_t addr)
{
struct trapframe *tf = p->p_md.md_regs;
tf->srr0 = (u_int32_t)addr;
return 0;
}
int
process_sstep(struct proc *p, int sstep)
{
#if 0
struct trapframe *tf = trapframe(p);
if (sstep)
tf->srr1 |= PSL_SE;
else
tf->srr1 &= ~PSL_SE;
#endif
return 0;
}
int
process_write_regs(struct proc *p, struct reg *regs)
{
#if 0
struct cpu_info *ci = curcpu();
struct trapframe *tf = trapframe(p);
struct pcb *pcb = &p->p_addr->u_pcb;
if ((regs->ps ^ tf->srr1) & PSL_USERSTATIC)
return EINVAL;
bcopy(regs->gpr, tf->fixreg, sizeof(regs->gpr));
/* XXX What if the state is on the other cpu? */
if (p == ci->ci_fpuproc) { /* release the fpu */
save_fpu();
ci->ci_fpuproc = NULL;
}
bcopy(regs->fpr, pcb->pcb_fpu.fpr, sizeof(regs->fpr));
if (!(pcb->pcb_flags & PCB_FPU)) {
pcb->pcb_fpu.fpcsr = 0;
pcb->pcb_flags |= PCB_FPU;
}
tf->srr0 = regs->pc;
tf->srr1 = regs->ps; /* is this the correct value for this ? */
tf->cr = regs->cnd;
tf->lr = regs->lr;
tf->ctr = regs->cnt;
tf->xer = regs->xer;
/* regs->mq = 0; what should this really be? */
#endif
return 0;
}
int
process_write_fpregs(struct proc *p, struct fpreg *regs)
{
#if 0
struct cpu_info *ci = curcpu();
struct pcb *pcb = &p->p_addr->u_pcb;
u_int64_t fpscr = regs->fpscr;
/* XXX What if the state is on the other cpu? */
if (p == ci->ci_fpuproc) { /* release the fpu */
save_fpu();
ci->ci_fpuproc = NULL;
}
bcopy(regs->fpr, pcb->pcb_fpu.fpr, sizeof(regs->fpr));
pcb->pcb_fpu.fpcsr = *(double *)&fpscr;
pcb->pcb_flags |= PCB_FPU;
#endif
return 0;
}
#endif /* PTRACE */
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