Annotation of sys/arch/mvme68k/mvme68k/hpux_machdep.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: hpux_machdep.c,v 1.14 2005/11/06 17:23:41 miod Exp $ */
! 2: /* $NetBSD: hpux_machdep.c,v 1.9 1997/03/16 10:00:45 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1995, 1996, 1997 Jason R. Thorpe. All rights reserved.
! 6: * Copyright (c) 1988 University of Utah.
! 7: * Copyright (c) 1990, 1993
! 8: * The Regents of the University of California. All rights reserved.
! 9: *
! 10: * This code is derived from software contributed to Berkeley by
! 11: * the Systems Programming Group of the University of Utah Computer
! 12: * Science Department.
! 13: *
! 14: * Redistribution and use in source and binary forms, with or without
! 15: * modification, are permitted provided that the following conditions
! 16: * are met:
! 17: * 1. Redistributions of source code must retain the above copyright
! 18: * notice, this list of conditions and the following disclaimer.
! 19: * 2. Redistributions in binary form must reproduce the above copyright
! 20: * notice, this list of conditions and the following disclaimer in the
! 21: * documentation and/or other materials provided with the distribution.
! 22: * 3. The name of the author may not be used to endorse or promote products
! 23: * derived from this software without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: */
! 37:
! 38: /*
! 39: * Machine-dependent bits for HP-UX binary compatibility.
! 40: */
! 41:
! 42: #include <sys/param.h>
! 43: #include <sys/systm.h>
! 44: #include <sys/signalvar.h>
! 45: #include <sys/kernel.h>
! 46: #include <sys/filedesc.h>
! 47: #include <sys/proc.h>
! 48: #include <sys/buf.h>
! 49: #include <sys/wait.h>
! 50: #include <sys/file.h>
! 51: #include <sys/exec.h>
! 52: #include <sys/namei.h>
! 53: #include <sys/vnode.h>
! 54: #include <sys/ioctl.h>
! 55: #include <sys/ptrace.h>
! 56: #include <sys/stat.h>
! 57: #include <sys/syslog.h>
! 58: #include <sys/malloc.h>
! 59: #include <sys/mount.h>
! 60: #include <sys/ipc.h>
! 61: #include <sys/namei.h>
! 62: #include <sys/user.h>
! 63: #include <sys/mman.h>
! 64: #include <sys/conf.h>
! 65:
! 66: #include <machine/cpu.h>
! 67: #include <machine/reg.h>
! 68: #include <machine/psl.h>
! 69: #include <machine/vmparam.h>
! 70:
! 71: #include <uvm/uvm_extern.h>
! 72:
! 73: #include <machine/reg.h>
! 74:
! 75: #include <sys/syscallargs.h>
! 76:
! 77: #include <compat/hpux/hpux.h>
! 78: #include <compat/hpux/hpux_sig.h>
! 79: #include <compat/hpux/hpux_util.h>
! 80: #include <compat/hpux/hpux_syscall.h>
! 81: #include <compat/hpux/hpux_syscallargs.h>
! 82:
! 83: #include <machine/hpux_machdep.h>
! 84:
! 85: extern short exframesize[];
! 86:
! 87: struct valtostr {
! 88: int val;
! 89: const char *str;
! 90: };
! 91:
! 92: static struct valtostr machine_table[] = {
! 93: /* We approximate based on cputype. */
! 94: { CPU_68020, "350" }, /* 68020 == 350. */
! 95: { CPU_68030, "370" }, /* 68030 == 370. */
! 96: { CPU_68040, "380" }, /* 68040 == 380. */
! 97: { -1, "3?0" }, /* unknown system (???) */
! 98: };
! 99:
! 100: /*
! 101: * 6.0 and later context.
! 102: * XXX what are the HP-UX "localroot" semantics? Should we handle
! 103: * XXX diskless systems here?
! 104: */
! 105: static struct valtostr context_table[] = {
! 106: { FPU_68040,
! 107: "standalone HP-MC68040 HP-MC68881 HP-MC68020 HP-MC68010 localroot default"
! 108: },
! 109: { FPU_68881,
! 110: "standalone HP-MC68881 HP-MC68020 HP-MC68010 localroot default"
! 111: },
! 112: { FPU_NONE,
! 113: "standalone HP-MC68020 HP-MC68010 localroot default"
! 114: },
! 115: { 0, NULL },
! 116: };
! 117:
! 118: #define UOFF(f) ((int)&((struct user *)0)->f)
! 119: #define HPUOFF(f) ((int)&((struct hpux_user *)0)->f)
! 120:
! 121: /* simplified FP structure */
! 122: struct bsdfp {
! 123: int save[54];
! 124: int reg[24];
! 125: int ctrl[3];
! 126: };
! 127:
! 128: /*
! 129: * m68k-specific setup for HP-UX executables.
! 130: * XXX m68k/m68k/hpux_machdep.c?
! 131: */
! 132: int
! 133: hpux_cpu_makecmds(p, epp)
! 134: struct proc *p;
! 135: struct exec_package *epp;
! 136: {
! 137: /* struct hpux_exec *hpux_ep = epp->ep_hdr; */
! 138:
! 139: /* set up command for exec header */
! 140: NEW_VMCMD(&epp->ep_vmcmds, hpux_cpu_vmcmd,
! 141: sizeof(struct hpux_exec), (long)epp->ep_hdr, NULLVP, 0, 0);
! 142: return (0);
! 143: }
! 144:
! 145: /*
! 146: * We need to stash the exec header in the pcb, so we define
! 147: * this vmcmd to do it for us, since vmcmds are executed once
! 148: * we're committed to the exec (i.e. the old program has been unmapped).
! 149: *
! 150: * The address of the header is in ev->ev_addr and the length is
! 151: * in ev->ev_len.
! 152: */
! 153: int
! 154: hpux_cpu_vmcmd(p, ev)
! 155: struct proc *p;
! 156: struct exec_vmcmd *ev;
! 157: {
! 158: struct hpux_exec *execp = (struct hpux_exec *)ev->ev_addr;
! 159:
! 160: /* Make sure we have room. */
! 161: if (ev->ev_len <= sizeof(p->p_addr->u_md.md_exec))
! 162: bcopy((caddr_t)ev->ev_addr, p->p_addr->u_md.md_exec,
! 163: ev->ev_len);
! 164:
! 165: /* Deal with misc. HP-UX process attributes. */
! 166: if (execp->ha_trsize & HPUXM_VALID) {
! 167: if (execp->ha_trsize & HPUXM_DATAWT)
! 168: p->p_md.md_flags &= ~MDP_CCBDATA;
! 169:
! 170: if (execp->ha_trsize & HPUXM_STKWT)
! 171: p->p_md.md_flags &= ~MDP_CCBSTACK;
! 172: }
! 173:
! 174: return (0);
! 175: }
! 176:
! 177: /*
! 178: * Machine-dependent stat structure conversion.
! 179: */
! 180: void
! 181: hpux_cpu_bsd_to_hpux_stat(sb, hsb)
! 182: struct stat *sb;
! 183: struct hpux_stat *hsb;
! 184: {
! 185: }
! 186:
! 187: /*
! 188: * Machine-dependent uname information.
! 189: */
! 190: void
! 191: hpux_cpu_uname(ut)
! 192: struct hpux_utsname *ut;
! 193: {
! 194: int i;
! 195:
! 196: bzero(ut->machine, sizeof(ut->machine));
! 197:
! 198: /*
! 199: * Find the current machine-ID in the table and
! 200: * copy the string into the uname.
! 201: */
! 202: for (i = 0; machine_table[i].val != -1; ++i)
! 203: if (machine_table[i].val == cputype)
! 204: break;
! 205:
! 206: snprintf(ut->machine, sizeof ut->machine, "9000/%s",
! 207: machine_table[i].str);
! 208: }
! 209:
! 210: /*
! 211: * Return arch-type for hpux_sys_sysconf()
! 212: */
! 213: int
! 214: hpux_cpu_sysconf_arch()
! 215: {
! 216:
! 217: switch (cputype) {
! 218: case CPU_68020:
! 219: return (HPUX_SYSCONF_CPUM020);
! 220:
! 221: case CPU_68030:
! 222: return (HPUX_SYSCONF_CPUM030);
! 223:
! 224: case CPU_68040:
! 225: return (HPUX_SYSCONF_CPUM040);
! 226:
! 227: default:
! 228: return (HPUX_SYSCONF_CPUM020); /* ??? */
! 229: }
! 230: /* NOTREACHED */
! 231: }
! 232:
! 233: /*
! 234: * HP-UX advise(2) system call.
! 235: */
! 236: int
! 237: hpux_sys_advise(p, v, retval)
! 238: struct proc *p;
! 239: void *v;
! 240: register_t *retval;
! 241: {
! 242: struct hpux_sys_advise_args *uap = v;
! 243: int error = 0;
! 244:
! 245: switch (SCARG(uap, arg)) {
! 246: case 0:
! 247: p->p_md.md_flags |= MDP_HPUXMMAP;
! 248: break;
! 249:
! 250: case 1:
! 251: ICIA();
! 252: break;
! 253:
! 254: case 2:
! 255: DCIA();
! 256: break;
! 257:
! 258: default:
! 259: error = EINVAL;
! 260: break;
! 261: }
! 262:
! 263: return (error);
! 264: }
! 265:
! 266: /*
! 267: * HP-UX getcontext(2) system call.
! 268: * Man page lies, behaviour here is based on observed behaviour.
! 269: */
! 270: int
! 271: hpux_sys_getcontext(p, v, retval)
! 272: struct proc *p;
! 273: void *v;
! 274: register_t *retval;
! 275: {
! 276: struct hpux_sys_getcontext_args *uap = v;
! 277: int l, i, error = 0;
! 278: register int len;
! 279:
! 280: for (i = 0; context_table[i].str != NULL; i++)
! 281: if (context_table[i].val == fputype)
! 282: break;
! 283: if (context_table[i].str == NULL) {
! 284: /*
! 285: * XXX What else? It's not like this can happen...
! 286: */
! 287: return (EINVAL);
! 288: }
! 289:
! 290: /* + 1 ... count the terminating \0. */
! 291: l = strlen(context_table[i].str) + 1;
! 292: len = min(SCARG(uap, len), l);
! 293:
! 294: if (len)
! 295: error = copyout(context_table[i].str, SCARG(uap, buf), len);
! 296: if (error == 0)
! 297: *retval = l;
! 298: return (0);
! 299: }
! 300:
! 301: /*
! 302: * Brutal hack! Map HP-UX u-area offsets into BSD k-stack offsets.
! 303: * XXX This probably doesn't work anymore, BTW. --thorpej
! 304: */
! 305: int
! 306: hpux_to_bsd_uoff(off, isps, p)
! 307: int *off, *isps;
! 308: struct proc *p;
! 309: {
! 310: register int *ar0 = p->p_md.md_regs;
! 311: struct hpux_fp *hp;
! 312: struct bsdfp *bp;
! 313: register u_int raddr;
! 314:
! 315: *isps = 0;
! 316:
! 317: /* u_ar0 field; procxmt puts in U_ar0 */
! 318: if ((int)off == HPUOFF(hpuxu_ar0))
! 319: return(UOFF(U_ar0));
! 320:
! 321: if (fputype) {
! 322: /* FP registers from PCB */
! 323: hp = (struct hpux_fp *)HPUOFF(hpuxu_fp);
! 324: bp = (struct bsdfp *)UOFF(u_pcb.pcb_fpregs);
! 325:
! 326: if (off >= hp->hpfp_ctrl && off < &hp->hpfp_ctrl[3])
! 327: return((int)&bp->ctrl[off - hp->hpfp_ctrl]);
! 328:
! 329: if (off >= hp->hpfp_reg && off < &hp->hpfp_reg[24])
! 330: return((int)&bp->reg[off - hp->hpfp_reg]);
! 331: }
! 332:
! 333: /*
! 334: * Everything else we recognize comes from the kernel stack,
! 335: * so we convert off to an absolute address (if not already)
! 336: * for simplicity.
! 337: */
! 338: if (off < (int *)ctob(UPAGES))
! 339: off = (int *)((u_int)off + (u_int)p->p_addr); /* XXX */
! 340:
! 341: /*
! 342: * General registers.
! 343: * We know that the HP-UX registers are in the same order as ours.
! 344: * The only difference is that their PS is 2 bytes instead of a
! 345: * padded 4 like ours throwing the alignment off.
! 346: */
! 347: if (off >= ar0 && off < &ar0[18]) {
! 348: /*
! 349: * PS: return low word and high word of PC as HP-UX would
! 350: * (e.g. &u.u_ar0[16.5]).
! 351: *
! 352: * XXX we don't do this since HP-UX adb doesn't rely on
! 353: * it and passing such an offset to procxmt will cause
! 354: * it to fail anyway. Instead, we just set the offset
! 355: * to PS and let hpux_ptrace() shift up the value returned.
! 356: */
! 357: if (off == &ar0[PS]) {
! 358: #if 0
! 359: raddr = (u_int) &((short *)ar0)[PS*2+1];
! 360: #else
! 361: raddr = (u_int) &ar0[(int)(off - ar0)];
! 362: #endif
! 363: *isps = 1;
! 364: }
! 365: /*
! 366: * PC: off will be &u.u_ar0[16.5] since HP-UX saved PS
! 367: * is only 16 bits.
! 368: */
! 369: else if (off == (int *)&(((short *)ar0)[PS*2+1]))
! 370: raddr = (u_int) &ar0[PC];
! 371: /*
! 372: * D0-D7, A0-A7: easy
! 373: */
! 374: else
! 375: raddr = (u_int) &ar0[(int)(off - ar0)];
! 376: return((int)(raddr - (u_int)p->p_addr)); /* XXX */
! 377: }
! 378:
! 379: /* everything else */
! 380: return (-1);
! 381: }
! 382:
! 383: #define HSS_RTEFRAME 0x01
! 384: #define HSS_FPSTATE 0x02
! 385: #define HSS_USERREGS 0x04
! 386:
! 387: struct hpuxsigstate {
! 388: int hss_flags; /* which of the following are valid */
! 389: struct frame hss_frame; /* original exception frame */
! 390: struct fpframe hss_fpstate; /* 68881/68882 state info */
! 391: };
! 392:
! 393: /*
! 394: * WARNING: code in locore.s assumes the layout shown here for hsf_signum
! 395: * thru hsf_handler so... don't screw with them!
! 396: */
! 397: struct hpuxsigframe {
! 398: int hsf_signum; /* signo for handler */
! 399: int hsf_code; /* additional info for handler */
! 400: struct hpuxsigcontext *hsf_scp; /* context ptr for handler */
! 401: sig_t hsf_handler; /* handler addr for u_sigc */
! 402: struct hpuxsigstate hsf_sigstate; /* state of the hardware */
! 403: struct hpuxsigcontext hsf_sc; /* actual context */
! 404: };
! 405:
! 406: #ifdef DEBUG
! 407: int hpuxsigdebug = 0;
! 408: int hpuxsigpid = 0;
! 409: #define SDB_FOLLOW 0x01
! 410: #define SDB_KSTACK 0x02
! 411: #define SDB_FPSTATE 0x04
! 412: #endif
! 413:
! 414: /*
! 415: * Send an interrupt to process.
! 416: */
! 417: /* ARGSUSED */
! 418: void
! 419: hpux_sendsig(catcher, sig, mask, code, type, val)
! 420: sig_t catcher;
! 421: int sig, mask;
! 422: u_long code;
! 423: int type;
! 424: union sigval val;
! 425: {
! 426: register struct proc *p = curproc;
! 427: register struct hpuxsigframe *kfp, *fp;
! 428: register struct frame *frame;
! 429: register struct sigacts *psp = p->p_sigacts;
! 430: register short ft;
! 431: int oonstack, fsize;
! 432:
! 433: frame = (struct frame *)p->p_md.md_regs;
! 434: ft = frame->f_format;
! 435: oonstack = psp->ps_sigstk.ss_flags & SS_ONSTACK;
! 436:
! 437: /*
! 438: * Allocate and validate space for the signal handler
! 439: * context. Note that if the stack is in P0 space, the
! 440: * call to grow() is a nop, and the useracc() check
! 441: * will fail if the process has not already allocated
! 442: * the space with a `brk'.
! 443: */
! 444: fsize = sizeof(struct hpuxsigframe);
! 445: if ((psp->ps_flags & SAS_ALTSTACK) && !oonstack &&
! 446: (psp->ps_sigonstack & sigmask(sig))) {
! 447: fp = (struct hpuxsigframe *)(psp->ps_sigstk.ss_sp +
! 448: psp->ps_sigstk.ss_size - fsize);
! 449: psp->ps_sigstk.ss_flags |= SS_ONSTACK;
! 450: } else
! 451: fp = (struct hpuxsigframe *)(frame->f_regs[SP] - fsize);
! 452: if ((unsigned)fp <= USRSTACK - ctob(p->p_vmspace->vm_ssize))
! 453: (void)uvm_grow(p, (unsigned)fp);
! 454:
! 455: #ifdef DEBUG
! 456: if ((hpuxsigdebug & SDB_KSTACK) && p->p_pid == hpuxsigpid)
! 457: printf("hpux_sendsig(%d): sig %d ssp %x usp %x scp %x ft %d\n",
! 458: p->p_pid, sig, &oonstack, fp, &fp->sf_sc, ft);
! 459: #endif
! 460:
! 461: kfp = (struct hpuxsigframe *)malloc((u_long)fsize, M_TEMP, M_WAITOK);
! 462:
! 463: /*
! 464: * Build the argument list for the signal handler.
! 465: */
! 466: kfp->hsf_signum = bsdtohpuxsig(sig);
! 467: kfp->hsf_code = code;
! 468: kfp->hsf_scp = &fp->hsf_sc;
! 469: kfp->hsf_handler = catcher;
! 470:
! 471: /*
! 472: * Save necessary hardware state. Currently this includes:
! 473: * - general registers
! 474: * - original exception frame (if not a "normal" frame)
! 475: * - FP coprocessor state
! 476: */
! 477: kfp->hsf_sigstate.hss_flags = HSS_USERREGS;
! 478: bcopy((caddr_t)frame->f_regs,
! 479: (caddr_t)kfp->hsf_sigstate.hss_frame.f_regs, sizeof frame->f_regs);
! 480: if (ft >= FMT7) {
! 481: #ifdef DEBUG
! 482: if (ft > 15 || exframesize[ft] < 0)
! 483: panic("hpux_sendsig: bogus frame type");
! 484: #endif
! 485: kfp->hsf_sigstate.hss_flags |= HSS_RTEFRAME;
! 486: kfp->hsf_sigstate.hss_frame.f_format = frame->f_format;
! 487: kfp->hsf_sigstate.hss_frame.f_vector = frame->f_vector;
! 488: bcopy((caddr_t)&frame->F_u,
! 489: (caddr_t)&kfp->hsf_sigstate.hss_frame.F_u, exframesize[ft]);
! 490:
! 491: /*
! 492: * Leave an indicator that we need to clean up the kernel
! 493: * stack. We do this by setting the "pad word" above the
! 494: * hardware stack frame to the amount the stack must be
! 495: * adjusted by.
! 496: *
! 497: * N.B. we increment rather than just set f_stackadj in
! 498: * case we are called from syscall when processing a
! 499: * sigreturn. In that case, f_stackadj may be non-zero.
! 500: */
! 501: frame->f_stackadj += exframesize[ft];
! 502: frame->f_format = frame->f_vector = 0;
! 503: #ifdef DEBUG
! 504: if (hpuxsigdebug & SDB_FOLLOW)
! 505: printf("hpux_sendsig(%d): copy out %d of frame %d\n",
! 506: p->p_pid, exframesize[ft], ft);
! 507: #endif
! 508: }
! 509: if (fputype) {
! 510: kfp->hsf_sigstate.hss_flags |= HSS_FPSTATE;
! 511: m68881_save(&kfp->hsf_sigstate.hss_fpstate);
! 512: }
! 513:
! 514: #ifdef DEBUG
! 515: if ((hpuxsigdebug & SDB_FPSTATE) && *(char *)&kfp->sf_state.ss_fpstate)
! 516: printf("hpux_sendsig(%d): copy out FP state (%x) to %x\n",
! 517: p->p_pid, *(u_int *)&kfp->sf_state.ss_fpstate,
! 518: &kfp->sf_state.ss_fpstate);
! 519: #endif
! 520:
! 521: /*
! 522: * Build the signal context to be used by hpux_sigreturn.
! 523: */
! 524: kfp->hsf_sc.hsc_syscall = 0; /* XXX */
! 525: kfp->hsf_sc.hsc_action = 0; /* XXX */
! 526: kfp->hsf_sc.hsc_pad1 = kfp->hsf_sc.hsc_pad2 = 0;
! 527: kfp->hsf_sc.hsc_onstack = oonstack;
! 528: kfp->hsf_sc.hsc_mask = mask;
! 529: kfp->hsf_sc.hsc_sp = frame->f_regs[SP];
! 530: kfp->hsf_sc.hsc_ps = frame->f_sr;
! 531: kfp->hsf_sc.hsc_pc = frame->f_pc;
! 532:
! 533: /* How amazingly convenient! */
! 534: kfp->hsf_sc._hsc_pad = 0;
! 535: kfp->hsf_sc._hsc_ap = (int)&fp->hsf_sigstate;
! 536:
! 537: if (copyout((caddr_t)kfp, (caddr_t)fp, fsize) != 0) {
! 538: #ifdef DEBUG
! 539: if ((hpuxsigdebug & SDB_KSTACK) && p->p_pid == hpuxsigpid)
! 540: printf("hpux_sendsig(%d): copyout failed on sig %d\n",
! 541: p->p_pid, sig);
! 542: #endif
! 543: /*
! 544: * Process has trashed its stack; give it an illegal
! 545: * instruction to halt it in its tracks.
! 546: */
! 547: free((caddr_t)kfp, M_TEMP);
! 548: sigexit(p, SIGILL);
! 549: /* NOTREACHED */
! 550: }
! 551: frame->f_regs[SP] = (int)fp;
! 552:
! 553: #ifdef DEBUG
! 554: if (hpuxsigdebug & SDB_FOLLOW) {
! 555: printf(
! 556: "hpux_sendsig(%d): sig %d scp %x fp %x sc_sp %x sc_ap %x\n",
! 557: p->p_pid, sig, kfp->sf_scp, fp,
! 558: kfp->sf_sc.sc_sp, kfp->sf_sc.sc_ap);
! 559: }
! 560: #endif
! 561:
! 562: /*
! 563: * Signal trampoline code is at base of user stack.
! 564: */
! 565: frame->f_pc = p->p_sigcode;
! 566: #ifdef DEBUG
! 567: if ((hpuxsigdebug & SDB_KSTACK) && p->p_pid == hpuxsigpid)
! 568: printf("hpux_sendsig(%d): sig %d returns\n",
! 569: p->p_pid, sig);
! 570: #endif
! 571: free((caddr_t)kfp, M_TEMP);
! 572: }
! 573:
! 574: /*
! 575: * System call to cleanup state after a signal
! 576: * has been taken. Reset signal mask and
! 577: * stack state from context left by sendsig (above).
! 578: * Return to previous pc and psl as specified by
! 579: * context left by sendsig. Check carefully to
! 580: * make sure that the user has not modified the
! 581: * psl to gain improper privileges or to cause
! 582: * a machine fault.
! 583: */
! 584: /* ARGSUSED */
! 585: int
! 586: hpux_sys_sigreturn(p, v, retval)
! 587: struct proc *p;
! 588: void *v;
! 589: register_t *retval;
! 590: {
! 591: struct hpux_sys_sigreturn_args /* {
! 592: syscallarg(struct hpuxsigcontext *) sigcntxp;
! 593: } */ *uap = v;
! 594: register struct hpuxsigcontext *scp;
! 595: register struct frame *frame;
! 596: register int rf;
! 597: struct hpuxsigcontext tsigc;
! 598: struct hpuxsigstate tstate;
! 599: int flags;
! 600:
! 601: scp = SCARG(uap, sigcntxp);
! 602: #ifdef DEBUG
! 603: if (hpuxsigdebug & SDB_FOLLOW)
! 604: printf("sigreturn: pid %d, scp %x\n", p->p_pid, scp);
! 605: #endif
! 606: if ((int)scp & 1)
! 607: return (EINVAL);
! 608:
! 609: /*
! 610: * Fetch and test the HP-UX context structure.
! 611: * We grab it all at once for speed.
! 612: */
! 613: if (copyin((caddr_t)scp, (caddr_t)&tsigc, sizeof tsigc))
! 614: return (EINVAL);
! 615: scp = &tsigc;
! 616: if ((scp->hsc_ps & PSL_USERCLR) != 0 ||
! 617: (scp->hsc_ps & PSL_USERSET) != PSL_USERSET)
! 618: return (EINVAL);
! 619:
! 620: /*
! 621: * Restore the user supplied information
! 622: */
! 623: if (scp->hsc_onstack & 01)
! 624: p->p_sigacts->ps_sigstk.ss_flags |= SS_ONSTACK;
! 625: else
! 626: p->p_sigacts->ps_sigstk.ss_flags &= ~SS_ONSTACK;
! 627: p->p_sigmask = scp->hsc_mask &~ sigcantmask;
! 628: frame = (struct frame *) p->p_md.md_regs;
! 629: frame->f_regs[SP] = scp->hsc_sp;
! 630: frame->f_pc = scp->hsc_pc;
! 631: frame->f_sr = scp->hsc_ps;
! 632:
! 633: /*
! 634: * Grab a pointer to the hpuxsigstate.
! 635: * If zero, the user is probably doing a longjmp.
! 636: * (This will never happen, really, since HP-UX doesn't
! 637: * know/care about the state pointer.)
! 638: */
! 639: if ((rf = scp->_hsc_ap) == 0)
! 640: return (EJUSTRETURN);
! 641:
! 642: /*
! 643: * See if there is anything to do before we go to the
! 644: * expense of copying in close to 1/2K of data
! 645: */
! 646: if (copyin((caddr_t)rf, &flags, sizeof(int)) != 0)
! 647: return (EINVAL);
! 648: #ifdef DEBUG
! 649: if (hpuxsigdebug & SDB_FOLLOW)
! 650: printf("sigreturn(%d): sc_ap %x flags %x\n",
! 651: p->p_pid, rf, flags);
! 652: #endif
! 653: if (flags == 0 || copyin((caddr_t)rf, (caddr_t)&tstate, sizeof tstate))
! 654: return (EJUSTRETURN);
! 655: #ifdef DEBUG
! 656: if ((hpuxsigdebug & SDB_KSTACK) && p->p_pid == hpuxsigpid)
! 657: printf("sigreturn(%d): ssp %x usp %x scp %x ft %d\n",
! 658: p->p_pid, &flags, scp->sc_sp, SCARG(uap, sigcntxp),
! 659: (flags & HSS_RTEFRAME) ? tstate.ss_frame.f_format : -1);
! 660: #endif
! 661: /*
! 662: * Restore most of the users registers except for A6 and SP
! 663: * which were handled above.
! 664: */
! 665: if (flags & HSS_USERREGS)
! 666: bcopy((caddr_t)tstate.hss_frame.f_regs,
! 667: (caddr_t)frame->f_regs, sizeof(frame->f_regs)-2*NBPW);
! 668:
! 669: /*
! 670: * Restore long stack frames. Note that we do not copy
! 671: * back the saved SR or PC, they were picked up above from
! 672: * the sigcontext structure.
! 673: */
! 674: if (flags & HSS_RTEFRAME) {
! 675: register int sz;
! 676:
! 677: /* grab frame type and validate */
! 678: sz = tstate.hss_frame.f_format;
! 679: if (sz > 15 || (sz = exframesize[sz]) < 0)
! 680: return (EINVAL);
! 681: frame->f_stackadj -= sz;
! 682: frame->f_format = tstate.hss_frame.f_format;
! 683: frame->f_vector = tstate.hss_frame.f_vector;
! 684: bcopy((caddr_t)&tstate.hss_frame.F_u,
! 685: (caddr_t)&frame->F_u, sz);
! 686: #ifdef DEBUG
! 687: if (hpuxsigdebug & SDB_FOLLOW)
! 688: printf("sigreturn(%d): copy in %d of frame type %d\n",
! 689: p->p_pid, sz, tstate.ss_frame.f_format);
! 690: #endif
! 691: }
! 692:
! 693: /*
! 694: * Finally we restore the original FP context
! 695: */
! 696: if (flags & HSS_FPSTATE)
! 697: m68881_restore(&tstate.hss_fpstate);
! 698:
! 699: #ifdef DEBUG
! 700: if ((hpuxsigdebug & SDB_FPSTATE) && *(char *)&tstate.ss_fpstate)
! 701: printf("sigreturn(%d): copied in FP state (%x) at %x\n",
! 702: p->p_pid, *(u_int *)&tstate.ss_fpstate,
! 703: &tstate.ss_fpstate);
! 704:
! 705: if ((hpuxsigdebug & SDB_FOLLOW) ||
! 706: ((hpuxsigdebug & SDB_KSTACK) && p->p_pid == hpuxsigpid))
! 707: printf("sigreturn(%d): returns\n", p->p_pid);
! 708: #endif
! 709: return (EJUSTRETURN);
! 710: }
! 711:
! 712: /*
! 713: * Set registers on exec.
! 714: * XXX Should clear registers except sp, pc.
! 715: */
! 716: void
! 717: hpux_setregs(p, pack, stack, retval)
! 718: register struct proc *p;
! 719: struct exec_package *pack;
! 720: u_long stack;
! 721: register_t *retval;
! 722: {
! 723: struct frame *frame = (struct frame *)p->p_md.md_regs;
! 724:
! 725: frame->f_pc = pack->ep_entry & ~1;
! 726: frame->f_regs[SP] = stack;
! 727: frame->f_regs[A2] = (int)PS_STRINGS;
! 728:
! 729: /* restore a null state frame */
! 730: p->p_addr->u_pcb.pcb_fpregs.fpf_null = 0;
! 731: if (fputype)
! 732: m68881_restore(&p->p_addr->u_pcb.pcb_fpregs);
! 733:
! 734: p->p_md.md_flags &= ~MDP_HPUXMMAP;
! 735: frame->f_regs[A0] = 0; /* not 68010 (bit 31), no FPA (30) */
! 736: retval[0] = 0; /* no float card */
! 737: if (fputype)
! 738: retval[1] = 1; /* yes 68881 */
! 739: else
! 740: retval[1] = 0; /* no 68881 */
! 741: }
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