/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2006 Olivier Houchard
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/signal.h>
#include <machine/gdb_machdep.h>
#include <machine/db_machdep.h>
#include <machine/vmparam.h>
#include <machine/pcb.h>
#include <machine/trap.h>
#include <machine/frame.h>
#include <machine/endian.h>
#include <gdb/gdb.h>
static register_t stacktest;
void *
gdb_cpu_getreg(int regnum, size_t *regsz)
{
*regsz = gdb_cpu_regsz(regnum);
if (kdb_thread == curthread) {
if (regnum < 13)
return (&kdb_frame->tf_r0 + regnum);
if (regnum == 13)
return (&kdb_frame->tf_svc_sp);
if (regnum == 14)
return (&kdb_frame->tf_svc_lr);
if (regnum == 15)
return (&kdb_frame->tf_pc);
if (regnum == 25)
return (&kdb_frame->tf_spsr);
}
switch (regnum) {
case 4: return (&kdb_thrctx->pcb_regs.sf_r4);
case 5: return (&kdb_thrctx->pcb_regs.sf_r5);
case 6: return (&kdb_thrctx->pcb_regs.sf_r6);
case 7: return (&kdb_thrctx->pcb_regs.sf_r7);
case 8: return (&kdb_thrctx->pcb_regs.sf_r8);
case 9: return (&kdb_thrctx->pcb_regs.sf_r9);
case 10: return (&kdb_thrctx->pcb_regs.sf_r10);
case 11: return (&kdb_thrctx->pcb_regs.sf_r11);
case 12: return (&kdb_thrctx->pcb_regs.sf_r12);
case 13: stacktest = kdb_thrctx->pcb_regs.sf_sp + 5 * 4;
return (&stacktest);
case 15:
/*
* On context switch, the PC is not put in the PCB, but
* we can retrieve it from the stack.
*/
if (kdb_thrctx->pcb_regs.sf_sp > KERNBASE) {
kdb_thrctx->pcb_regs.sf_pc = *(register_t *)
(kdb_thrctx->pcb_regs.sf_sp + 4 * 4);
return (&kdb_thrctx->pcb_regs.sf_pc);
}
}
return (NULL);
}
void
gdb_cpu_setreg(int regnum, void *val)
{
if (kdb_thread != curthread)
return;
switch (regnum) {
case GDB_REG_PC:
kdb_frame->tf_pc = *(register_t *)val;
break;
case GDB_REG_SP:
kdb_frame->tf_svc_sp = *(register_t *)val;
break;
case GDB_REG_LR:
kdb_frame->tf_svc_lr = *(register_t *)val;
break;
default:
/* Write to the general purpose registers r0-r12. */
if (regnum >= 0 && regnum <= 12) {
*(&kdb_frame->tf_r0 + regnum) = *(register_t *)val;
}
break;
}
}
int
gdb_cpu_signal(int type, int code)
{
switch (type) {
case T_BREAKPOINT: return (SIGTRAP);
}
return (SIGEMT);
}
