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/*
* Copyright (c) 2010 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Rui Paulo under sponsorship from the
* FreeBSD Foundation.
*
* 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 AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/ptrace.h>
#include <err.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "_libproc.h"
int
proc_regget(struct proc_handle *phdl, proc_reg_t reg, unsigned long *regvalue)
{
struct reg regs;
if (phdl->status == PS_DEAD || phdl->status == PS_UNDEAD ||
phdl->status == PS_IDLE) {
errno = ENOENT;
return (-1);
}
memset(®s, 0, sizeof(regs));
if (ptrace(PT_GETREGS, proc_getpid(phdl), (caddr_t)®s, 0) < 0)
return (-1);
switch (reg) {
case REG_PC:
#if defined(__amd64__)
*regvalue = regs.r_rip;
#elif defined(__i386__)
*regvalue = regs.r_eip;
#elif defined(__mips__)
*regvalue = regs.r_regs[PC];
#elif defined(__powerpc__)
*regvalue = regs.pc;
#endif
break;
case REG_SP:
#if defined(__amd64__)
*regvalue = regs.r_rsp;
#elif defined(__i386__)
*regvalue = regs.r_esp;
#elif defined(__mips__)
*regvalue = regs.r_regs[SP];
#elif defined(__powerpc__)
*regvalue = regs.fixreg[1];
#endif
break;
default:
DPRINTFX("ERROR: no support for reg number %d", reg);
return (-1);
}
return (0);
}
int
proc_regset(struct proc_handle *phdl, proc_reg_t reg, unsigned long regvalue)
{
struct reg regs;
if (phdl->status == PS_DEAD || phdl->status == PS_UNDEAD ||
phdl->status == PS_IDLE) {
errno = ENOENT;
return (-1);
}
if (ptrace(PT_GETREGS, proc_getpid(phdl), (caddr_t)®s, 0) < 0)
return (-1);
switch (reg) {
case REG_PC:
#if defined(__amd64__)
regs.r_rip = regvalue;
#elif defined(__i386__)
regs.r_eip = regvalue;
#elif defined(__mips__)
regs.r_regs[PC] = regvalue;
#elif defined(__powerpc__)
regs.pc = regvalue;
#endif
break;
case REG_SP:
#if defined(__amd64__)
regs.r_rsp = regvalue;
#elif defined(__i386__)
regs.r_esp = regvalue;
#elif defined(__mips__)
regs.r_regs[PC] = regvalue;
#elif defined(__powerpc__)
regs.fixreg[1] = regvalue;
#endif
break;
default:
DPRINTFX("ERROR: no support for reg number %d", reg);
return (-1);
}
if (ptrace(PT_SETREGS, proc_getpid(phdl), (caddr_t)®s, 0) < 0)
return (-1);
return (0);
}
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