1210688Srpaulo/* 2210688Srpaulo * Copyright (c) 2010 The FreeBSD Foundation 3210688Srpaulo * All rights reserved. 4210688Srpaulo * 5210688Srpaulo * This software was developed by Rui Paulo under sponsorship from the 6210688Srpaulo * FreeBSD Foundation. 7210688Srpaulo * 8210688Srpaulo * Redistribution and use in source and binary forms, with or without 9210688Srpaulo * modification, are permitted provided that the following conditions 10210688Srpaulo * are met: 11210688Srpaulo * 1. Redistributions of source code must retain the above copyright 12210688Srpaulo * notice, this list of conditions and the following disclaimer. 13210688Srpaulo * 2. Redistributions in binary form must reproduce the above copyright 14210688Srpaulo * notice, this list of conditions and the following disclaimer in the 15210688Srpaulo * documentation and/or other materials provided with the distribution. 16210688Srpaulo * 17210688Srpaulo * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18210688Srpaulo * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19210688Srpaulo * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20210688Srpaulo * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21210688Srpaulo * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22210688Srpaulo * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23210688Srpaulo * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24210688Srpaulo * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25210688Srpaulo * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26210688Srpaulo * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27210688Srpaulo * SUCH DAMAGE. 28210688Srpaulo */ 29210688Srpaulo 30210688Srpaulo#include <sys/cdefs.h> 31210688Srpaulo__FBSDID("$FreeBSD$"); 32210688Srpaulo 33210688Srpaulo#include <sys/types.h> 34210688Srpaulo#include <sys/ptrace.h> 35210688Srpaulo 36210688Srpaulo#include <err.h> 37210688Srpaulo#include <stdio.h> 38210688Srpaulo#include <string.h> 39210688Srpaulo#include <errno.h> 40210688Srpaulo#include "_libproc.h" 41210688Srpaulo 42210688Srpauloint 43210688Srpauloproc_regget(struct proc_handle *phdl, proc_reg_t reg, unsigned long *regvalue) 44210688Srpaulo{ 45210688Srpaulo struct reg regs; 46210688Srpaulo 47210688Srpaulo if (phdl->status == PS_DEAD || phdl->status == PS_UNDEAD || 48210688Srpaulo phdl->status == PS_IDLE) { 49210688Srpaulo errno = ENOENT; 50210688Srpaulo return (-1); 51210688Srpaulo } 52210688Srpaulo memset(®s, 0, sizeof(regs)); 53210688Srpaulo if (ptrace(PT_GETREGS, proc_getpid(phdl), (caddr_t)®s, 0) < 0) 54210688Srpaulo return (-1); 55210688Srpaulo switch (reg) { 56210688Srpaulo case REG_PC: 57210688Srpaulo#if defined(__amd64__) 58210688Srpaulo *regvalue = regs.r_rip; 59210688Srpaulo#elif defined(__i386__) 60210688Srpaulo *regvalue = regs.r_eip; 61233402Sgonzo#elif defined(__mips__) 62233402Sgonzo *regvalue = regs.r_regs[PC]; 63242723Sjhibbits#elif defined(__powerpc__) 64242723Sjhibbits *regvalue = regs.pc; 65210688Srpaulo#endif 66210688Srpaulo break; 67210688Srpaulo case REG_SP: 68210688Srpaulo#if defined(__amd64__) 69210688Srpaulo *regvalue = regs.r_rsp; 70210688Srpaulo#elif defined(__i386__) 71210688Srpaulo *regvalue = regs.r_esp; 72233402Sgonzo#elif defined(__mips__) 73233402Sgonzo *regvalue = regs.r_regs[SP]; 74242723Sjhibbits#elif defined(__powerpc__) 75242723Sjhibbits *regvalue = regs.fixreg[1]; 76210688Srpaulo#endif 77210688Srpaulo break; 78210688Srpaulo default: 79259895Smarkj DPRINTFX("ERROR: no support for reg number %d", reg); 80210688Srpaulo return (-1); 81210688Srpaulo } 82210688Srpaulo 83210688Srpaulo return (0); 84210688Srpaulo} 85210688Srpaulo 86210688Srpauloint 87210688Srpauloproc_regset(struct proc_handle *phdl, proc_reg_t reg, unsigned long regvalue) 88210688Srpaulo{ 89210688Srpaulo struct reg regs; 90210688Srpaulo 91210688Srpaulo if (phdl->status == PS_DEAD || phdl->status == PS_UNDEAD || 92210688Srpaulo phdl->status == PS_IDLE) { 93210688Srpaulo errno = ENOENT; 94210688Srpaulo return (-1); 95210688Srpaulo } 96210688Srpaulo if (ptrace(PT_GETREGS, proc_getpid(phdl), (caddr_t)®s, 0) < 0) 97210688Srpaulo return (-1); 98210688Srpaulo switch (reg) { 99210688Srpaulo case REG_PC: 100210688Srpaulo#if defined(__amd64__) 101210688Srpaulo regs.r_rip = regvalue; 102210688Srpaulo#elif defined(__i386__) 103210688Srpaulo regs.r_eip = regvalue; 104233402Sgonzo#elif defined(__mips__) 105233402Sgonzo regs.r_regs[PC] = regvalue; 106242723Sjhibbits#elif defined(__powerpc__) 107242723Sjhibbits regs.pc = regvalue; 108210688Srpaulo#endif 109210688Srpaulo break; 110210688Srpaulo case REG_SP: 111210688Srpaulo#if defined(__amd64__) 112210688Srpaulo regs.r_rsp = regvalue; 113210688Srpaulo#elif defined(__i386__) 114210688Srpaulo regs.r_esp = regvalue; 115233402Sgonzo#elif defined(__mips__) 116233402Sgonzo regs.r_regs[PC] = regvalue; 117242723Sjhibbits#elif defined(__powerpc__) 118242723Sjhibbits regs.fixreg[1] = regvalue; 119210688Srpaulo#endif 120210688Srpaulo break; 121210688Srpaulo default: 122259895Smarkj DPRINTFX("ERROR: no support for reg number %d", reg); 123210688Srpaulo return (-1); 124210688Srpaulo } 125210688Srpaulo if (ptrace(PT_SETREGS, proc_getpid(phdl), (caddr_t)®s, 0) < 0) 126210688Srpaulo return (-1); 127210688Srpaulo 128210688Srpaulo return (0); 129210688Srpaulo} 130