1 /* $NetBSD: sunos32_machdep.c,v 1.33 2016/07/07 06:55:38 msaitoh Exp $ */ 2 /* from: NetBSD: sunos_machdep.c,v 1.14 2001/01/29 01:37:56 mrg Exp */ 3 4 /* 5 * Copyright (c) 1995, 2001 Matthew R. Green 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: sunos32_machdep.c,v 1.33 2016/07/07 06:55:38 msaitoh Exp $"); 32 33 #ifdef _KERNEL_OPT 34 #include "opt_ddb.h" 35 #include "firm_events.h" 36 #endif 37 38 #include <sys/param.h> 39 #include <sys/exec.h> 40 #include <sys/systm.h> 41 #include <sys/proc.h> 42 #include <sys/namei.h> 43 #include <sys/filedesc.h> 44 #include <sys/ioctl.h> 45 #include <sys/mount.h> 46 #include <sys/kernel.h> 47 #include <sys/signal.h> 48 #include <sys/signalvar.h> 49 #include <sys/select.h> 50 51 #include <sys/syscallargs.h> 52 #include <compat/sunos/sunos.h> 53 #include <compat/sunos/sunos_syscallargs.h> 54 #include <compat/netbsd32/netbsd32.h> 55 #include <compat/sunos32/sunos32.h> 56 #include <compat/sunos32/sunos32_syscallargs.h> 57 #include <compat/sunos32/sunos32_exec.h> 58 59 #include <compat/sys/signal.h> 60 #include <compat/sys/signalvar.h> 61 62 #include <machine/frame.h> 63 #include <machine/cpu.h> 64 #include <machine/vuid_event.h> 65 #include <machine/reg.h> 66 67 #include <dev/sun/event_var.h> 68 69 #ifdef DEBUG 70 #include <sparc64/sparc64/sigdebug.h> 71 #endif 72 73 struct sunos32_sigcontext { 74 uint32_t sc_onstack; /* sigstack state to restore */ 75 uint32_t sc_mask; /* signal mask to restore (old style) */ 76 /* begin machine dependent portion */ 77 uint32_t sc_sp; /* %sp to restore */ 78 uint32_t sc_pc; /* pc to restore */ 79 uint32_t sc_npc; /* npc to restore */ 80 uint32_t sc_psr; /* pstate to restore */ 81 uint32_t sc_g1; /* %g1 to restore */ 82 uint32_t sc_o0; /* %o0 to restore */ 83 }; 84 85 struct sunos32_sigframe { 86 uint32_t sf_signo; /* signal number */ 87 uint32_t sf_code; /* code */ 88 uint32_t sf_scp; /* SunOS user addr of sigcontext */ 89 uint32_t sf_addr; /* SunOS compat, always 0 for now */ 90 struct sunos32_sigcontext sf_sc; /* actual sigcontext */ 91 }; 92 93 #if NFIRM_EVENTS > 0 94 static int ev_out32(struct firm_event *, int, struct uio *); 95 #endif 96 97 /* 98 * Set up registers on exec. 99 * 100 * XXX this entire mess must be fixed 101 */ 102 /* ARGSUSED */ 103 void 104 sunos32_setregs(struct lwp *l, struct exec_package *pack, vaddr_t stack) 105 /* stack: XXX */ 106 { 107 struct trapframe64 *tf = l->l_md.md_tf; 108 struct fpstate64 *fs; 109 int64_t tstate; 110 struct proc *p = l->l_proc; 111 112 /* Don't allow misaligned code by default */ 113 p->p_md.md_flags &= ~MDP_FIXALIGN; 114 115 /* Mark this as a 32-bit emulation */ 116 mutex_enter(p->p_lock); 117 p->p_flag |= PK_32; 118 mutex_exit(p->p_lock); 119 120 /* Setup the ev_out32 hook */ 121 #if NFIRM_EVENTS > 0 122 if (ev_out32_hook == NULL) 123 ev_out32_hook = ev_out32; 124 #endif 125 126 /* 127 * Set the registers to 0 except for: 128 * %o6: stack pointer, built in exec()) 129 * %tstate: (retain icc and xcc and cwp bits) 130 * %g1: p->p_psstrp (used by crt0) 131 * %tpc,%tnpc: entry point of program 132 */ 133 tstate = ((PSTATE_USER32)<<TSTATE_PSTATE_SHIFT) 134 | (tf->tf_tstate & TSTATE_CWP); 135 if ((fs = l->l_md.md_fpstate) != NULL) { 136 /* 137 * We hold an FPU state. If we own *the* FPU chip state 138 * we must get rid of it, and the only way to do that is 139 * to save it. In any case, get rid of our FPU state. 140 */ 141 if (l == fplwp) { 142 savefpstate(fs); 143 fplwp = NULL; 144 } 145 pool_cache_put(fpstate_cache, fs); 146 l->l_md.md_fpstate = NULL; 147 } 148 memset(tf, 0, sizeof *tf); 149 tf->tf_tstate = tstate; 150 tf->tf_global[1] = (u_int)p->p_psstrp; 151 tf->tf_pc = pack->ep_entry & ~3; 152 tf->tf_npc = tf->tf_pc + 4; 153 154 stack -= sizeof(struct rwindow32); 155 tf->tf_out[6] = stack; 156 tf->tf_out[7] = 0; 157 } 158 159 void 160 sunos32_sendsig(const ksiginfo_t *ksi, const sigset_t *mask) 161 { 162 int sig = ksi->ksi_signo; 163 struct lwp *l = curlwp; /* XXX */ 164 struct proc *p = l->l_proc; 165 struct sunos32_sigframe *fp; 166 struct trapframe64 *tf; 167 struct rwindow32 *oldsp, *newsp; 168 struct sunos32_sigframe sf; 169 struct sunos32_sigcontext *scp; 170 uint32_t addr, oldsp32; 171 int onstack, error; 172 sig_t catcher = SIGACTION(p, sig).sa_handler; 173 174 tf = l->l_md.md_tf; 175 /* Need to attempt to zero extend this 32-bit pointer */ 176 oldsp = (struct rwindow32 *)(u_long)(u_int)tf->tf_out[6]; 177 oldsp32 = (uint32_t)(u_long)oldsp; 178 179 /* 180 * Compute new user stack addresses, subtract off 181 * one signal frame, and align. 182 */ 183 onstack = 184 (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 185 (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; 186 187 if (onstack) 188 fp = (struct sunos32_sigframe *) 189 ((char *)l->l_sigstk.ss_sp + l->l_sigstk.ss_size); 190 else 191 fp = (struct sunos32_sigframe *)oldsp; 192 193 fp = (struct sunos32_sigframe *)((u_long)(fp - 1) & ~7); 194 195 #ifdef DEBUG 196 sigpid = p->p_pid; 197 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) { 198 mutex_exit(p->p_lock); 199 printf("sunos32_sendsig: %s[%d] sig %d newusp %p scp %p oldsp %p\n", 200 p->p_comm, p->p_pid, sig, fp, &fp->sf_sc, oldsp); 201 #ifdef DDB 202 if (sigdebug & SDB_DDB) Debugger(); 203 #endif 204 mutex_enter(p->p_lock); 205 } 206 #endif 207 /* 208 * Now set up the signal frame. We build it in kernel space 209 * and then copy it out. We probably ought to just build it 210 * directly in user space.... 211 */ 212 sf.sf_signo = sig; 213 sf.sf_code = (uint32_t)ksi->ksi_trap; 214 scp = &fp->sf_sc; 215 if ((u_long)scp >= 0x100000000) 216 printf("sunos32_sendsig: sf_scp overflow %p > 0x100000000\n", scp); 217 sf.sf_scp = (uint32_t)(u_long)scp; 218 sf.sf_addr = 0; /* XXX */ 219 220 /* 221 * Build the signal context to be used by sigreturn. 222 */ 223 sf.sf_sc.sc_onstack = l->l_sigstk.ss_flags & SS_ONSTACK; 224 native_sigset_to_sigset13(mask, &sf.sf_sc.sc_mask); 225 sf.sf_sc.sc_sp = (u_int)(u_long)oldsp; 226 sf.sf_sc.sc_pc = tf->tf_pc; 227 sf.sf_sc.sc_npc = tf->tf_npc; 228 sf.sf_sc.sc_psr = TSTATECCR_TO_PSR(tf->tf_tstate); /* XXX */ 229 sf.sf_sc.sc_g1 = tf->tf_global[1]; 230 sf.sf_sc.sc_o0 = tf->tf_out[0]; 231 232 /* 233 * Put the stack in a consistent state before we whack away 234 * at it. Note that write_user_windows may just dump the 235 * registers into the pcb; we need them in the process's memory. 236 * We also need to make sure that when we start the signal handler, 237 * its %i6 (%fp), which is loaded from the newly allocated stack area, 238 * joins seamlessly with the frame it was in when the signal occurred, 239 * so that the debugger and _longjmp code can back up through it. 240 */ 241 sendsig_reset(l, sig); 242 mutex_exit(p->p_lock); 243 newsp = (struct rwindow32 *)((long)fp - sizeof(struct rwindow32)); 244 write_user_windows(); 245 #ifdef DEBUG 246 if ((sigdebug & SDB_KSTACK)) 247 printf("sunos32_sendsig: saving sf to %p, setting stack pointer %p to %p\n", 248 fp, &(((struct rwindow32 *)newsp)->rw_in[6]), oldsp); 249 #endif 250 error = (rwindow_save(l) || copyout((void *)&sf, (void *)fp, sizeof sf) || 251 copyout((void *)&oldsp32, &(((struct rwindow32 *)newsp)->rw_in[6]), sizeof oldsp32)); 252 mutex_enter(p->p_lock); 253 if (error) { 254 /* 255 * Process has trashed its stack; give it an illegal 256 * instruction to halt it in its tracks. 257 */ 258 #ifdef DEBUG 259 mutex_exit(p->p_lock); 260 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 261 printf("sunos32_sendsig: window save or copyout error\n"); 262 printf("sunos32_sendsig: stack was trashed trying to send sig %d, sending SIGILL\n", sig); 263 #ifdef DDB 264 if (sigdebug & SDB_DDB) Debugger(); 265 #endif 266 mutex_enter(p->p_lock); 267 #endif 268 sigexit(l, SIGILL); 269 /* NOTREACHED */ 270 } 271 272 #ifdef DEBUG 273 if ((sigdebug & SDB_FOLLOW)) { 274 printf("sunos32_sendsig: %s[%d] sig %d scp %p\n", 275 p->p_comm, p->p_pid, sig, &fp->sf_sc); 276 } 277 #endif 278 /* 279 * Arrange to continue execution at the code copied out in exec(). 280 * It needs the function to call in %g1, and a new stack pointer. 281 */ 282 addr = (uint32_t)(u_long)catcher; /* user does his own trampolining */ 283 tf->tf_pc = addr; 284 tf->tf_npc = addr + 4; 285 tf->tf_out[6] = (uint64_t)(u_int)(u_long)newsp; 286 #ifdef DEBUG 287 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) { 288 mutex_exit(p->p_lock); 289 printf("sunos32_sendsig: about to return to catcher %p thru %p\n", 290 catcher, (void *)(u_long)addr); 291 #ifdef DDB 292 if (sigdebug & SDB_DDB) Debugger(); 293 #endif 294 mutex_enter(p->p_lock); 295 } 296 #endif 297 } 298 299 int 300 sunos32_sys_sigreturn(struct lwp *l, const struct sunos32_sys_sigreturn_args *uap, register_t *retval) 301 { 302 /* { 303 syscallarg(netbsd32_sigcontextp_t) sigcntxp; 304 } */ 305 struct proc *p = l->l_proc; 306 struct sunos32_sigcontext sc, *scp; 307 sigset_t mask; 308 struct trapframe64 *tf; 309 310 /* First ensure consistent stack state (see sendsig). */ 311 write_user_windows(); 312 if (rwindow_save(l)) { 313 mutex_enter(p->p_lock); 314 sigexit(l, SIGILL); 315 } 316 #ifdef DEBUG 317 if (sigdebug & SDB_FOLLOW) { 318 printf("sunos32_sigreturn: %s[%d], sigcntxp %p\n", 319 p->p_comm, p->p_pid, (void *)(u_long)SCARG(uap, sigcntxp)); 320 #ifdef DDB 321 if (sigdebug & SDB_DDB) Debugger(); 322 #endif 323 } 324 #endif 325 326 scp = (struct sunos32_sigcontext *)(u_long)SCARG(uap, sigcntxp); 327 if ((vaddr_t)scp & 3 || (copyin((void *)scp, &sc, sizeof sc) != 0)) 328 return (EFAULT); 329 scp = ≻ 330 331 tf = l->l_md.md_tf; 332 /* 333 * Only the icc bits in the psr are used, so it need not be 334 * verified. pc and npc must be multiples of 4. This is all 335 * that is required; if it holds, just do it. 336 */ 337 if (((scp->sc_pc | scp->sc_npc) & 3) != 0 || scp->sc_pc == 0 || scp->sc_npc == 0) 338 { 339 #ifdef DEBUG 340 printf("sunos32_sigreturn: pc %x or npc %x invalid\n", scp->sc_pc, scp->sc_npc); 341 #ifdef DDB 342 Debugger(); 343 #endif 344 #endif 345 return (EINVAL); 346 } 347 /* take only psr ICC field */ 348 tf->tf_tstate = (int64_t)(tf->tf_tstate & ~TSTATE_CCR) | PSRCC_TO_TSTATE(scp->sc_psr); 349 tf->tf_pc = scp->sc_pc; 350 tf->tf_npc = scp->sc_npc; 351 tf->tf_global[1] = scp->sc_g1; 352 tf->tf_out[0] = scp->sc_o0; 353 tf->tf_out[6] = scp->sc_sp; 354 #ifdef DEBUG 355 if (sigdebug & SDB_FOLLOW) { 356 printf("sunos32_sigreturn: return trapframe pc=%p sp=%p tstate=%llx\n", 357 (void *)(u_long)tf->tf_pc, (void *)(u_long)tf->tf_out[6], (unsigned long long)tf->tf_tstate); 358 #ifdef DDB 359 if (sigdebug & SDB_DDB) Debugger(); 360 #endif 361 } 362 #endif 363 364 mutex_enter(p->p_lock); 365 if (scp->sc_onstack & SS_ONSTACK) 366 l->l_sigstk.ss_flags |= SS_ONSTACK; 367 else 368 l->l_sigstk.ss_flags &= ~SS_ONSTACK; 369 /* Restore signal mask */ 370 native_sigset13_to_sigset(&scp->sc_mask, &mask); 371 (void) sigprocmask1(l, SIG_SETMASK, &mask, 0); 372 mutex_exit(p->p_lock); 373 374 return (EJUSTRETURN); 375 } 376 377 #if NFIRM_EVENTS > 0 378 /* 379 * Write out a series of 32-bit firm_events. 380 */ 381 static int 382 ev_out32(struct firm_event *e, int n, struct uio *uio) 383 { 384 struct firm_event32 e32; 385 int error = 0; 386 387 while (n-- && error == 0) { 388 e32.id = e->id; 389 e32.value = e->value; 390 e32.time.tv_sec = e->time.tv_sec; 391 e32.time.tv_usec = e->time.tv_usec; 392 error = uiomove((void *)&e32, sizeof(e32), uio); 393 e++; 394 } 395 return (error); 396 } 397 #endif 398
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