1 /* $NetBSD: sunos32_machdep.c,v 1.8 2002/07/04 23:32:07 thorpej 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 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifdef _KERNEL_OPT 33 #include "opt_ddb.h" 34 #endif 35 36 #include <sys/param.h> 37 #include <sys/exec.h> 38 #include <sys/systm.h> 39 #include <sys/proc.h> 40 #include <sys/namei.h> 41 #include <sys/user.h> 42 #include <sys/filedesc.h> 43 #include <sys/ioctl.h> 44 #include <sys/mount.h> 45 #include <sys/kernel.h> 46 #include <sys/signal.h> 47 #include <sys/signalvar.h> 48 #include <sys/malloc.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 <machine/frame.h> 60 #include <machine/cpu.h> 61 #include <machine/vuid_event.h> 62 #include <machine/reg.h> 63 64 #include <dev/sun/event_var.h> 65 66 #ifdef DEBUG 67 #include <sparc64/sparc64/sigdebug.h> 68 #endif 69 70 struct sunos32_sigcontext { 71 u_int32_t sc_onstack; /* sigstack state to restore */ 72 u_int32_t sc_mask; /* signal mask to restore (old style) */ 73 /* begin machine dependent portion */ 74 u_int32_t sc_sp; /* %sp to restore */ 75 u_int32_t sc_pc; /* pc to restore */ 76 u_int32_t sc_npc; /* npc to restore */ 77 u_int32_t sc_psr; /* pstate to restore */ 78 u_int32_t sc_g1; /* %g1 to restore */ 79 u_int32_t sc_o0; /* %o0 to restore */ 80 }; 81 82 struct sunos32_sigframe { 83 u_int32_t sf_signo; /* signal number */ 84 u_int32_t sf_code; /* code */ 85 u_int32_t sf_scp; /* SunOS user addr of sigcontext */ 86 u_int32_t sf_addr; /* SunOS compat, always 0 for now */ 87 struct sunos32_sigcontext sf_sc; /* actual sigcontext */ 88 }; 89 90 static int ev_out32 __P((struct firm_event *, int, struct uio *)); 91 92 /* 93 * Set up registers on exec. 94 * 95 * XXX this entire mess must be fixed 96 */ 97 /* ARGSUSED */ 98 void 99 sunos32_setregs(p, pack, stack) 100 struct proc *p; 101 struct exec_package *pack; 102 u_long stack; /* XXX */ 103 { 104 register struct trapframe64 *tf = p->p_md.md_tf; 105 register struct fpstate64 *fs; 106 register int64_t tstate; 107 108 /* Don't allow misaligned code by default */ 109 p->p_md.md_flags &= ~MDP_FIXALIGN; 110 111 /* Mark this as a 32-bit emulation */ 112 p->p_flag |= P_32; 113 114 /* Setup the ev_out32 hook */ 115 if (ev_out32_hook == NULL) 116 ev_out32_hook = ev_out32; 117 118 /* 119 * Set the registers to 0 except for: 120 * %o6: stack pointer, built in exec()) 121 * %tstate: (retain icc and xcc and cwp bits) 122 * %g1: address of p->p_psstr (used by crt0) 123 * %tpc,%tnpc: entry point of program 124 */ 125 tstate = ((PSTATE_USER32)<<TSTATE_PSTATE_SHIFT) 126 | (tf->tf_tstate & TSTATE_CWP); 127 if ((fs = p->p_md.md_fpstate) != NULL) { 128 /* 129 * We hold an FPU state. If we own *the* FPU chip state 130 * we must get rid of it, and the only way to do that is 131 * to save it. In any case, get rid of our FPU state. 132 */ 133 if (p == fpproc) { 134 savefpstate(fs); 135 fpproc = NULL; 136 } 137 free((void *)fs, M_SUBPROC); 138 p->p_md.md_fpstate = NULL; 139 } 140 bzero((caddr_t)tf, sizeof *tf); 141 tf->tf_tstate = tstate; 142 tf->tf_global[1] = (u_int)(u_long)p->p_psstr; 143 tf->tf_pc = pack->ep_entry & ~3; 144 tf->tf_npc = tf->tf_pc + 4; 145 146 stack -= sizeof(struct rwindow32); 147 tf->tf_out[6] = stack; 148 tf->tf_out[7] = NULL; 149 } 150 151 void 152 sunos32_sendsig(sig, mask, code) 153 int sig; 154 sigset_t *mask; 155 u_long code; 156 { 157 struct proc *p = curproc; /* XXX */ 158 struct sunos32_sigframe *fp; 159 struct trapframe64 *tf; 160 struct rwindow32 *oldsp, *newsp; 161 struct sunos32_sigframe sf; 162 struct sunos32_sigcontext *scp; 163 u_int32_t addr, oldsp32; 164 int onstack; 165 sig_t catcher = SIGACTION(p, sig).sa_handler; 166 167 tf = p->p_md.md_tf; 168 /* Need to attempt to zero extend this 32-bit pointer */ 169 oldsp = (struct rwindow32 *)(u_long)(u_int)tf->tf_out[6]; 170 oldsp32 = (u_int32_t)(u_long)oldsp; 171 172 /* 173 * Compute new user stack addresses, subtract off 174 * one signal frame, and align. 175 */ 176 onstack = 177 (p->p_sigctx.ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 178 (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; 179 180 if (onstack) 181 fp = (struct sunos32_sigframe *) 182 ((caddr_t)p->p_sigctx.ps_sigstk.ss_sp + p->p_sigctx.ps_sigstk.ss_size); 183 else 184 fp = (struct sunos32_sigframe *)oldsp; 185 186 fp = (struct sunos32_sigframe *)((u_long)(fp - 1) & ~7); 187 188 #ifdef DEBUG 189 sigpid = p->p_pid; 190 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) { 191 printf("sunos32_sendsig: %s[%d] sig %d newusp %p scp %p oldsp %p\n", 192 p->p_comm, p->p_pid, sig, fp, &fp->sf_sc, oldsp); 193 #ifdef DDB 194 if (sigdebug & SDB_DDB) Debugger(); 195 #endif 196 } 197 #endif 198 /* 199 * Now set up the signal frame. We build it in kernel space 200 * and then copy it out. We probably ought to just build it 201 * directly in user space.... 202 */ 203 sf.sf_signo = sig; 204 sf.sf_code = (u_int32_t)code; 205 scp = &fp->sf_sc; 206 if ((u_long)scp >= 0x100000000) 207 printf("sunos32_sendsig: sf_scp overflow %p > 0x100000000\n", scp); 208 sf.sf_scp = (u_int32_t)(u_long)scp; 209 sf.sf_addr = 0; /* XXX */ 210 211 /* 212 * Build the signal context to be used by sigreturn. 213 */ 214 sf.sf_sc.sc_onstack = p->p_sigctx.ps_sigstk.ss_flags & SS_ONSTACK; 215 native_sigset_to_sigset13(mask, &sf.sf_sc.sc_mask); 216 sf.sf_sc.sc_sp = (u_int)(u_long)oldsp; 217 sf.sf_sc.sc_pc = tf->tf_pc; 218 sf.sf_sc.sc_npc = tf->tf_npc; 219 sf.sf_sc.sc_psr = TSTATECCR_TO_PSR(tf->tf_tstate); /* XXX */ 220 sf.sf_sc.sc_g1 = tf->tf_global[1]; 221 sf.sf_sc.sc_o0 = tf->tf_out[0]; 222 223 /* 224 * Put the stack in a consistent state before we whack away 225 * at it. Note that write_user_windows may just dump the 226 * registers into the pcb; we need them in the process's memory. 227 * We also need to make sure that when we start the signal handler, 228 * its %i6 (%fp), which is loaded from the newly allocated stack area, 229 * joins seamlessly with the frame it was in when the signal occurred, 230 * so that the debugger and _longjmp code can back up through it. 231 */ 232 newsp = (struct rwindow32 *)((long)fp - sizeof(struct rwindow32)); 233 write_user_windows(); 234 #ifdef DEBUG 235 if ((sigdebug & SDB_KSTACK)) 236 printf("sunos32_sendsig: saving sf to %p, setting stack pointer %p to %p\n", 237 fp, &(((struct rwindow32 *)newsp)->rw_in[6]), oldsp); 238 #endif 239 if (rwindow_save(p) || copyout((caddr_t)&sf, (caddr_t)fp, sizeof sf) || 240 copyout((caddr_t)&oldsp32, &(((struct rwindow32 *)newsp)->rw_in[6]), sizeof oldsp32)) { 241 /* 242 * Process has trashed its stack; give it an illegal 243 * instruction to halt it in its tracks. 244 */ 245 #ifdef DEBUG 246 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 247 printf("sunos32_sendsig: window save or copyout error\n"); 248 printf("sunos32_sendsig: stack was trashed trying to send sig %d, sending SIGILL\n", sig); 249 #ifdef DDB 250 if (sigdebug & SDB_DDB) Debugger(); 251 #endif 252 #endif 253 sigexit(p, SIGILL); 254 /* NOTREACHED */ 255 } 256 257 #ifdef DEBUG 258 if ((sigdebug & SDB_FOLLOW)) { 259 printf("sunos32_sendsig: %s[%d] sig %d scp %p\n", 260 p->p_comm, p->p_pid, sig, &fp->sf_sc); 261 } 262 #endif 263 /* 264 * Arrange to continue execution at the code copied out in exec(). 265 * It needs the function to call in %g1, and a new stack pointer. 266 */ 267 addr = (u_int32_t)(u_long)catcher; /* user does his own trampolining */ 268 tf->tf_pc = addr; 269 tf->tf_npc = addr + 4; 270 tf->tf_out[6] = (u_int64_t)(u_int)(u_long)newsp; 271 #ifdef DEBUG 272 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) { 273 printf("sunos32_sendsig: about to return to catcher %p thru %p\n", 274 catcher, (void *)(u_long)addr); 275 #ifdef DDB 276 if (sigdebug & SDB_DDB) Debugger(); 277 #endif 278 } 279 #endif 280 } 281 282 int 283 sunos32_sys_sigreturn(p, v, retval) 284 register struct proc *p; 285 void *v; 286 register_t *retval; 287 { 288 struct sunos32_sys_sigreturn_args /* 289 syscallarg(netbsd32_sigcontextp_t) sigcntxp; 290 } */ *uap = v; 291 struct sunos32_sigcontext sc, *scp; 292 sigset_t mask; 293 struct trapframe64 *tf; 294 295 /* First ensure consistent stack state (see sendsig). */ 296 write_user_windows(); 297 if (rwindow_save(p)) 298 sigexit(p, SIGILL); 299 #ifdef DEBUG 300 if (sigdebug & SDB_FOLLOW) { 301 printf("sunos32_sigreturn: %s[%d], sigcntxp %p\n", 302 p->p_comm, p->p_pid, (void *)(u_long)SCARG(uap, sigcntxp)); 303 #ifdef DDB 304 if (sigdebug & SDB_DDB) Debugger(); 305 #endif 306 } 307 #endif 308 309 scp = (struct sunos32_sigcontext *)(u_long)SCARG(uap, sigcntxp); 310 if ((vaddr_t)scp & 3 || (copyin((caddr_t)scp, &sc, sizeof sc) != 0)) 311 return (EFAULT); 312 scp = ≻ 313 314 tf = p->p_md.md_tf; 315 /* 316 * Only the icc bits in the psr are used, so it need not be 317 * verified. pc and npc must be multiples of 4. This is all 318 * that is required; if it holds, just do it. 319 */ 320 if (((scp->sc_pc | scp->sc_npc) & 3) != 0 || scp->sc_pc == 0 || scp->sc_npc == 0) 321 { 322 #ifdef DEBUG 323 printf("sunos32_sigreturn: pc %x or npc %x invalid\n", scp->sc_pc, scp->sc_npc); 324 #ifdef DDB 325 Debugger(); 326 #endif 327 #endif 328 return (EINVAL); 329 } 330 /* take only psr ICC field */ 331 tf->tf_tstate = (int64_t)(tf->tf_tstate & ~TSTATE_CCR) | PSRCC_TO_TSTATE(scp->sc_psr); 332 tf->tf_pc = scp->sc_pc; 333 tf->tf_npc = scp->sc_npc; 334 tf->tf_global[1] = scp->sc_g1; 335 tf->tf_out[0] = scp->sc_o0; 336 tf->tf_out[6] = scp->sc_sp; 337 #ifdef DEBUG 338 if (sigdebug & SDB_FOLLOW) { 339 printf("sunos32_sigreturn: return trapframe pc=%p sp=%p tstate=%llx\n", 340 (void *)(u_long)tf->tf_pc, (void *)(u_long)tf->tf_out[6], (unsigned long long)tf->tf_tstate); 341 #ifdef DDB 342 if (sigdebug & SDB_DDB) Debugger(); 343 #endif 344 } 345 #endif 346 347 if (scp->sc_onstack & SS_ONSTACK) 348 p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK; 349 else 350 p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK; 351 352 /* Restore signal mask */ 353 native_sigset13_to_sigset(&scp->sc_mask, &mask); 354 (void) sigprocmask1(p, SIG_SETMASK, &mask, 0); 355 356 return (EJUSTRETURN); 357 } 358 359 /* 360 * Write out a series of 32-bit firm_events. 361 */ 362 static int 363 ev_out32(e, n, uio) 364 struct firm_event *e; 365 int n; 366 struct uio *uio; 367 { 368 struct firm_event32 e32; 369 int error = 0; 370 371 while (n-- && error == 0) { 372 e32.id = e->id; 373 e32.value = e->value; 374 e32.time.tv_sec = e->time.tv_sec; 375 e32.time.tv_usec = e->time.tv_usec; 376 error = uiomove((caddr_t)&e32, sizeof(e32), uio); 377 e++; 378 } 379 return (error); 380 } 381