1 /* $NetBSD: process_machdep.c,v 1.12 2004/03/24 16:39:52 ws Exp $ */ 2 3 /* 4 * Copyright (c) 1993 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Jan-Simon Pendry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * From: 35 * Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel 36 */ 37 38 /* 39 * Copyright (c) 1995 Frank Lancaster. All rights reserved. 40 * Copyright (c) 1995 Tools GmbH. All rights reserved. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by TooLs GmbH. 54 * 4. The name of TooLs GmbH may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 61 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 62 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 63 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 64 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 65 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 66 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 /* 70 * Copyright (c) 1995 Charles M. Hannum. All rights reserved. 71 * Copyright (c) 1993 Jan-Simon Pendry 72 * All rights reserved. 73 * 74 * This code is derived from software contributed to Berkeley by 75 * Jan-Simon Pendry. 76 * 77 * Redistribution and use in source and binary forms, with or without 78 * modification, are permitted provided that the following conditions 79 * are met: 80 * 1. Redistributions of source code must retain the above copyright 81 * notice, this list of conditions and the following disclaimer. 82 * 2. Redistributions in binary form must reproduce the above copyright 83 * notice, this list of conditions and the following disclaimer in the 84 * documentation and/or other materials provided with the distribution. 85 * 3. All advertising materials mentioning features or use of this software 86 * must display the following acknowledgement: 87 * This product includes software developed by the University of 88 * California, Berkeley and its contributors. 89 * 4. Neither the name of the University nor the names of its contributors 90 * may be used to endorse or promote products derived from this software 91 * without specific prior written permission. 92 * 93 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 94 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 95 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 96 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 97 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 98 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 99 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 101 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 102 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 103 * SUCH DAMAGE. 104 * 105 * From: 106 * Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel 107 */ 108 109 /* 110 * This file may seem a bit stylized, but that so that it's easier to port. 111 * Functions to be implemented here are: 112 * 113 * process_read_regs(proc, regs) 114 * Get the current user-visible register set from the process 115 * and copy it into the regs structure (<machine/reg.h>). 116 * The process is stopped at the time read_regs is called. 117 * 118 * process_write_regs(proc, regs) 119 * Update the current register set from the passed in regs 120 * structure. Take care to avoid clobbering special CPU 121 * registers or privileged bits in the PSL. 122 * The process is stopped at the time write_regs is called. 123 * 124 * process_sstep(proc, sstep) 125 * Arrange for the process to trap or not trap depending on sstep 126 * after executing a single instruction. 127 * 128 * process_set_pc(proc) 129 * Set the process's program counter. 130 */ 131 132 #include "opt_armfpe.h" 133 134 #include <sys/param.h> 135 136 __KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.12 2004/03/24 16:39:52 ws Exp $"); 137 138 #include <sys/proc.h> 139 #include <sys/ptrace.h> 140 #include <sys/systm.h> 141 #include <sys/user.h> 142 143 #include <machine/frame.h> 144 #include <machine/pcb.h> 145 #include <machine/reg.h> 146 147 #include <arm/armreg.h> 148 149 #ifdef ARMFPE 150 #include <arm/fpe-arm/armfpe.h> 151 #endif 152 153 static __inline struct trapframe * 154 process_frame(struct lwp *l) 155 { 156 157 return l->l_addr->u_pcb.pcb_tf; 158 } 159 160 int 161 process_read_regs(struct lwp *l, struct reg *regs) 162 { 163 struct trapframe *tf = process_frame(l); 164 165 KASSERT(tf != NULL); 166 bcopy((caddr_t)&tf->tf_r0, (caddr_t)regs->r, sizeof(regs->r)); 167 regs->r_sp = tf->tf_usr_sp; 168 regs->r_lr = tf->tf_usr_lr; 169 regs->r_pc = tf->tf_pc; 170 regs->r_cpsr = tf->tf_spsr; 171 172 #ifdef DIAGNOSTIC 173 if ((tf->tf_spsr & PSR_MODE) == PSR_USR32_MODE 174 && tf->tf_spsr & I32_bit) 175 panic("process_read_regs: Interrupts blocked in user process"); 176 #endif 177 178 return(0); 179 } 180 181 int 182 process_read_fpregs(struct lwp *l, struct fpreg *regs) 183 { 184 #ifdef ARMFPE 185 arm_fpe_getcontext(p, regs); 186 return(0); 187 #else /* ARMFPE */ 188 /* No hardware FP support */ 189 memset(regs, 0, sizeof(struct fpreg)); 190 return(0); 191 #endif /* ARMFPE */ 192 } 193 194 int 195 process_write_regs(struct lwp *l, struct reg *regs) 196 { 197 struct trapframe *tf = process_frame(l); 198 199 KASSERT(tf != NULL); 200 bcopy((caddr_t)regs->r, (caddr_t)&tf->tf_r0, sizeof(regs->r)); 201 tf->tf_usr_sp = regs->r_sp; 202 tf->tf_usr_lr = regs->r_lr; 203 #ifdef __PROG32 204 tf->tf_pc = regs->r_pc; 205 tf->tf_spsr &= ~PSR_FLAGS; 206 tf->tf_spsr |= regs->r_cpsr & PSR_FLAGS; 207 #ifdef DIAGNOSTIC 208 if ((tf->tf_spsr & PSR_MODE) == PSR_USR32_MODE 209 && tf->tf_spsr & I32_bit) 210 panic("process_write_regs: Interrupts blocked in user process"); 211 #endif 212 #else /* __PROG26 */ 213 if ((regs->r_pc & (R15_MODE | R15_IRQ_DISABLE | R15_FIQ_DISABLE)) != 0) 214 return EPERM; 215 216 tf->tf_r15 = regs->r_pc; 217 #endif 218 219 return(0); 220 } 221 222 int 223 process_write_fpregs(struct lwp *l, struct fpreg *regs) 224 { 225 #ifdef ARMFPE 226 arm_fpe_setcontext(p, regs); 227 return(0); 228 #else /* ARMFPE */ 229 /* No hardware FP support */ 230 return(0); 231 #endif /* ARMFPE */ 232 } 233 234 int 235 process_set_pc(struct lwp *l, caddr_t addr) 236 { 237 struct trapframe *tf = process_frame(l); 238 239 KASSERT(tf != NULL); 240 #ifdef __PROG32 241 tf->tf_pc = (int)addr; 242 #else /* __PROG26 */ 243 /* Only set the PC, not the PSR */ 244 if (((register_t)addr & R15_PC) != (register_t)addr) 245 return EINVAL; 246 tf->tf_r15 = (tf->tf_r15 & ~R15_PC) | (register_t)addr; 247 #endif 248 249 return (0); 250 } 251