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/* $OpenBSD: powerpc.c,v 1.3 2002/07/22 02:54:23 art Exp $ */
/*
* Copyright (c) 2002 Dale Rahn <drahn@openbsd.org>
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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 <stddef.h>
#include <sys/param.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include <machine/frame.h>
#include "pmdb.h"
static const char *md_reg_names[] = {
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"r8", "r9", "r10","r11","r12","r13","r14","r15",
"r16","r17","r18","r19","r20","r21","r22","r23",
"r24","r25","r26","r27","r28","r29","r30","r31",
"pc", "ps", "cnd", "lr", "cnt", "xer", "mq"
};
struct md_def md_def = { md_reg_names, 39, 32};
void
md_def_init(void)
{
/* no need to do anything */
}
int
md_getframe(struct pstate *ps, int frame, struct md_frame *fram)
{
struct reg r;
reg fp, pc;
int i;
if (process_getregs(ps, &r))
return (-1);
fp = r.gpr[1];
if (frame == 0) {
pc = r.pc;
goto out;
}
pc = r.lr;
for (i = 1; i < frame; i++) {
if (fp != (fp & ~7)) { /* should be 0xf */
return -1;
}
if (process_read(ps, fp, &fp, sizeof(fp)) < 0)
return -1;
if (process_read(ps, fp+4, &pc, sizeof(pc)) < 0)
return -1;
if (fp == 0) {
return -1;
}
}
out:
fram->pc = pc;
fram->fp = fp;
fram->nargs = 0;
return 0;
}
int
md_getregs(struct pstate *ps, reg *regs)
{
struct reg md_reg;
if (process_getregs(ps, &md_reg))
return -1;
memcpy(regs, &md_reg, 32 * sizeof(long));
memcpy(®s[32], &md_reg.pc, 7 * sizeof(long));
return 0;
}
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