linux_machdep.c revision 1.15
1 /* $NetBSD: linux_machdep.c,v 1.15 2005/05/20 12:48:27 fvdl Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden. 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/param.h> 40 41 __KERNEL_RCSID(0, "$NetBSD: linux_machdep.c,v 1.15 2005/05/20 12:48:27 fvdl Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/signalvar.h> 46 #include <sys/kernel.h> 47 #include <sys/proc.h> 48 #include <sys/user.h> 49 #include <sys/buf.h> 50 #include <sys/reboot.h> 51 #include <sys/conf.h> 52 #include <sys/exec.h> 53 #include <sys/file.h> 54 #include <sys/callout.h> 55 #include <sys/malloc.h> 56 #include <sys/mbuf.h> 57 #include <sys/msgbuf.h> 58 #include <sys/mount.h> 59 #include <sys/vnode.h> 60 #include <sys/device.h> 61 #include <sys/sa.h> 62 #include <sys/syscallargs.h> 63 #include <sys/filedesc.h> 64 #include <sys/exec_elf.h> 65 #include <sys/disklabel.h> 66 #include <sys/ioctl.h> 67 #include <miscfs/specfs/specdev.h> 68 69 #include <compat/linux/common/linux_types.h> 70 #include <compat/linux/common/linux_signal.h> 71 #include <compat/linux/common/linux_util.h> 72 #include <compat/linux/common/linux_ioctl.h> 73 #include <compat/linux/common/linux_hdio.h> 74 #include <compat/linux/common/linux_exec.h> 75 #include <compat/linux/common/linux_machdep.h> 76 77 #include <compat/linux/linux_syscallargs.h> 78 79 void 80 linux_setregs(l, epp, stack) 81 struct lwp *l; 82 struct exec_package *epp; 83 u_long stack; 84 { 85 86 setregs(l, epp, stack); 87 } 88 89 static __inline struct trapframe * 90 process_frame(struct lwp *l) 91 { 92 93 return l->l_addr->u_pcb.pcb_tf; 94 } 95 96 void 97 linux_sendsig(const ksiginfo_t *ksi, const sigset_t *mask) 98 { 99 struct lwp *l = curlwp; 100 struct proc *p = l->l_proc; 101 struct trapframe *tf; 102 struct linux_sigframe *fp, frame; 103 int onstack; 104 const int sig = ksi->ksi_signo; 105 sig_t catcher = SIGACTION(p, sig).sa_handler; 106 107 tf = process_frame(l); 108 109 /* 110 * The Linux version of this code is in 111 * linux/arch/arm/kernel/signal.c. 112 */ 113 114 /* Do we need to jump onto the signal stack? */ 115 onstack = 116 (p->p_sigctx.ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 117 (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; 118 119 /* Allocate space for the signal handler context. */ 120 if (onstack) 121 fp = (struct linux_sigframe *)((caddr_t)p->p_sigctx.ps_sigstk.ss_sp + 122 p->p_sigctx.ps_sigstk.ss_size); 123 else 124 fp = (struct linux_sigframe *)tf->tf_usr_sp; 125 fp--; 126 127 /* Build stack frame for signal trampoline. */ 128 129 /* Save register context. */ 130 frame.sf_sc.sc_r0 = tf->tf_r0; 131 frame.sf_sc.sc_r1 = tf->tf_r1; 132 frame.sf_sc.sc_r2 = tf->tf_r2; 133 frame.sf_sc.sc_r3 = tf->tf_r3; 134 frame.sf_sc.sc_r4 = tf->tf_r4; 135 frame.sf_sc.sc_r5 = tf->tf_r5; 136 frame.sf_sc.sc_r6 = tf->tf_r6; 137 frame.sf_sc.sc_r7 = tf->tf_r7; 138 frame.sf_sc.sc_r8 = tf->tf_r8; 139 frame.sf_sc.sc_r9 = tf->tf_r9; 140 frame.sf_sc.sc_r10 = tf->tf_r10; 141 frame.sf_sc.sc_r11 = tf->tf_r11; 142 frame.sf_sc.sc_r12 = tf->tf_r12; 143 frame.sf_sc.sc_sp = tf->tf_usr_sp; 144 frame.sf_sc.sc_lr = tf->tf_usr_lr; 145 frame.sf_sc.sc_pc = tf->tf_pc; 146 frame.sf_sc.sc_cpsr = tf->tf_spsr; 147 148 /* Save signal stack. */ 149 /* Linux doesn't save the onstack flag in sigframe */ 150 151 /* Save signal mask. */ 152 native_to_linux_old_extra_sigset(&frame.sf_sc.sc_mask, 153 frame.sf_extramask, mask); 154 155 /* Other state (mostly faked) */ 156 /* 157 * trapno should indicate the trap that caused the signal: 158 * 6 -> undefined instruction 159 * 11 -> address exception 160 * 14 -> data/prefetch abort 161 */ 162 frame.sf_sc.sc_trapno = 0; 163 frame.sf_sc.sc_error_code = 0; 164 frame.sf_sc.sc_fault_address = (u_int32_t) ksi->ksi_addr; 165 166 if (copyout(&frame, fp, sizeof(frame)) != 0) { 167 /* 168 * Process has trashed its stack; give it an illegal 169 * instruction to halt it in its tracks. 170 */ 171 sigexit(l, SIGILL); 172 /* NOTREACHED */ 173 } 174 /* 175 * Build context to run handler in. 176 */ 177 tf->tf_r0 = native_to_linux_signo[sig]; 178 tf->tf_r1 = 0; /* XXX Should be a siginfo_t */ 179 tf->tf_r2 = 0; 180 tf->tf_r3 = (register_t)catcher; 181 tf->tf_usr_sp = (register_t)fp; 182 tf->tf_pc = (register_t)p->p_sigctx.ps_sigcode; 183 184 /* Remember that we're now on the signal stack. */ 185 if (onstack) 186 p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK; 187 188 } 189 190 #if 0 191 /* 192 * System call to cleanup state after a signal 193 * has been taken. Reset signal mask and 194 * stack state from context left by sendsig (above). 195 * Return to previous pc and psl as specified by 196 * context left by sendsig. Check carefully to 197 * make sure that the user has not modified the 198 * psl to gain improper privileges or to cause 199 * a machine fault. 200 */ 201 int 202 linux_sys_rt_sigreturn(p, v, retval) 203 struct proc *p; 204 void *v; 205 register_t *retval; 206 { 207 /* XXX XAX write me */ 208 return(ENOSYS); 209 } 210 #endif 211 212 int 213 linux_sys_sigreturn(l, v, retval) 214 struct lwp *l; 215 void *v; 216 register_t *retval; 217 { 218 struct linux_sigframe *sfp, frame; 219 struct proc *p = l->l_proc; 220 struct trapframe *tf; 221 sigset_t mask; 222 223 tf = process_frame(l); 224 225 /* 226 * The trampoline code hands us the context. 227 * It is unsafe to keep track of it ourselves, in the event that a 228 * program jumps out of a signal handler. 229 */ 230 sfp = (struct linux_sigframe *)tf->tf_usr_sp; 231 if (copyin((caddr_t)sfp, &frame, sizeof(*sfp)) != 0) 232 return (EFAULT); 233 234 /* 235 * Make sure the processor mode has not been tampered with and 236 * interrupts have not been disabled. 237 */ 238 #ifdef __PROG32 239 if ((frame.sf_sc.sc_cpsr & PSR_MODE) != PSR_USR32_MODE || 240 (frame.sf_sc.sc_cpsr & (I32_bit | F32_bit)) != 0) 241 return (EINVAL); 242 #else /* __PROG26 */ 243 if ((frame.sf_sc.sc_pc & R15_MODE) != R15_MODE_USR || 244 (frame.sf_sc.sc_pc & (R15_IRQ_DISABLE | R15_FIQ_DISABLE)) != 0) 245 return EINVAL; 246 #endif 247 248 /* Restore register context. */ 249 tf = process_frame(l); 250 tf->tf_r0 = frame.sf_sc.sc_r0; 251 tf->tf_r1 = frame.sf_sc.sc_r1; 252 tf->tf_r2 = frame.sf_sc.sc_r2; 253 tf->tf_r3 = frame.sf_sc.sc_r3; 254 tf->tf_r4 = frame.sf_sc.sc_r4; 255 tf->tf_r5 = frame.sf_sc.sc_r5; 256 tf->tf_r6 = frame.sf_sc.sc_r6; 257 tf->tf_r7 = frame.sf_sc.sc_r7; 258 tf->tf_r8 = frame.sf_sc.sc_r8; 259 tf->tf_r9 = frame.sf_sc.sc_r9; 260 tf->tf_r10 = frame.sf_sc.sc_r10; 261 tf->tf_r11 = frame.sf_sc.sc_r11; 262 tf->tf_r12 = frame.sf_sc.sc_r12; 263 tf->tf_usr_sp = frame.sf_sc.sc_sp; 264 tf->tf_usr_lr = frame.sf_sc.sc_lr; 265 tf->tf_pc = frame.sf_sc.sc_pc; 266 tf->tf_spsr = frame.sf_sc.sc_cpsr; 267 268 /* Restore signal stack. */ 269 p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK; 270 271 /* Restore signal mask. */ 272 linux_old_extra_to_native_sigset(&mask, &frame.sf_sc.sc_mask, 273 frame.sf_extramask); 274 (void) sigprocmask1(p, SIG_SETMASK, &mask, 0); 275 276 return (EJUSTRETURN); 277 } 278 279 /* 280 * major device numbers remapping 281 */ 282 dev_t 283 linux_fakedev(dev, raw) 284 dev_t dev; 285 int raw; 286 { 287 /* XXX write me */ 288 return dev; 289 } 290 291 /* 292 * We come here in a last attempt to satisfy a Linux ioctl() call 293 */ 294 int 295 linux_machdepioctl(p, v, retval) 296 struct proc *p; 297 void *v; 298 register_t *retval; 299 { 300 struct linux_sys_ioctl_args /* { 301 syscallarg(int) fd; 302 syscallarg(u_long) com; 303 syscallarg(caddr_t) data; 304 } */ *uap = v; 305 struct sys_ioctl_args bia; 306 u_long com; 307 308 SCARG(&bia, fd) = SCARG(uap, fd); 309 SCARG(&bia, data) = SCARG(uap, data); 310 com = SCARG(uap, com); 311 312 switch (com) { 313 default: 314 printf("linux_machdepioctl: invalid ioctl %08lx\n", com); 315 return EINVAL; 316 } 317 SCARG(&bia, com) = com; 318 /* XXX NJWLWP */ 319 return sys_ioctl(curlwp, &bia, retval); 320 } 321 322 int 323 linux_usertrap(struct lwp *l, vaddr_t trapaddr, void *arg) 324 { 325 return 0; 326 } 327
Indexes created Sun Sep 21 20:09:37 GMT 2025