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/* $OpenBSD: i386.c,v 1.4 2002/07/22 01:20:50 art Exp $ */
/*
* Copyright (c) 2002 Federico Schwindt <fgsch@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 <sys/param.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include <machine/frame.h>
#include "pmdb.h"
/*
* No frame for x86?
*/
struct frame {
int fp;
int pc;
};
static const char *md_reg_names[] = {
"%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi", "%eip",
"%eflags", "%cs", "%ss", "%ds", "%es", "%fs", "%gs"
};
struct md_def md_def = { md_reg_names, 16, 8 };
void
md_def_init(void)
{
/* no need to do anything */
}
int
md_getframe(struct pstate *ps, int frame, struct md_frame *fram)
{
struct frame fr;
struct reg r;
int count;
if (process_getregs(ps, &r) != 0)
return (-1);
fr.fp = r.r_ebp;
fr.pc = r.r_eip;
for (count = 0; count < frame; count++) {
if (process_read(ps, fr.fp, &fr, sizeof(fr)) < 0)
return (-1);
if (fr.pc < 0x1000)
return (-1);
}
fram->pc = fr.pc;
fram->fp = fr.fp;
return (0);
}
int
md_getregs(struct pstate *ps, reg *regs)
{
struct reg r;
if (process_getregs(ps, &r) != 0)
return (-1);
memcpy(regs, &r, sizeof(r));
return (0);
}
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