linux-user/sparc/signal.c

   1 /*
   2  *  Emulation of Linux signals
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #include "qemu/osdep.h"
  20 #include "qemu.h"
  21 #include "signal-common.h"
  22 #include "linux-user/trace.h"
  23
  24 #define __SUNOS_MAXWIN   31
  25
  26 /* This is what SunOS does, so shall I. */
  27 struct target_sigcontext {
  28     abi_ulong sigc_onstack;      /* state to restore */
  29
  30     abi_ulong sigc_mask;         /* sigmask to restore */
  31     abi_ulong sigc_sp;           /* stack pointer */
  32     abi_ulong sigc_pc;           /* program counter */
  33     abi_ulong sigc_npc;          /* next program counter */
  34     abi_ulong sigc_psr;          /* for condition codes etc */
  35     abi_ulong sigc_g1;           /* User uses these two registers */
  36     abi_ulong sigc_o0;           /* within the trampoline code. */
  37
  38     /* Now comes information regarding the users window set
  39          * at the time of the signal.
  40          */
  41     abi_ulong sigc_oswins;       /* outstanding windows */
  42
  43     /* stack ptrs for each regwin buf */
  44     char *sigc_spbuf[__SUNOS_MAXWIN];
  45
  46     /* Windows to restore after signal */
  47     struct {
  48         abi_ulong locals[8];
  49         abi_ulong ins[8];
  50     } sigc_wbuf[__SUNOS_MAXWIN];
  51 };
  52 /* A Sparc stack frame */
  53 struct sparc_stackf {
  54     abi_ulong locals[8];
  55     abi_ulong ins[8];
  56     /* It's simpler to treat fp and callers_pc as elements of ins[]
  57          * since we never need to access them ourselves.
  58          */
  59     char *structptr;
  60     abi_ulong xargs[6];
  61     abi_ulong xxargs[1];
  62 };
  63
  64 typedef struct {
  65     struct {
  66         abi_ulong psr;
  67         abi_ulong pc;
  68         abi_ulong npc;
  69         abi_ulong y;
  70         abi_ulong u_regs[16]; /* globals and ins */
  71     }               si_regs;
  72     int             si_mask;
  73 } __siginfo_t;
  74
  75 typedef struct {
  76     abi_ulong  si_float_regs[32];
  77     unsigned   long si_fsr;
  78     unsigned   long si_fpqdepth;
  79     struct {
  80         unsigned long *insn_addr;
  81         unsigned long insn;
  82     } si_fpqueue [16];
  83 } qemu_siginfo_fpu_t;
  84
  85
  86 struct target_signal_frame {
  87     struct sparc_stackf ss;
  88     __siginfo_t         info;
  89     abi_ulong           fpu_save;
  90     abi_ulong           insns[2] __attribute__ ((aligned (8)));
  91     abi_ulong           extramask[TARGET_NSIG_WORDS - 1];
  92     abi_ulong           extra_size; /* Should be 0 */
  93     qemu_siginfo_fpu_t fpu_state;
  94 };
  95 struct target_rt_signal_frame {
  96     struct sparc_stackf ss;
  97     siginfo_t           info;
  98     abi_ulong           regs[20];
  99     sigset_t            mask;
 100     abi_ulong           fpu_save;
 101     unsigned int        insns[2];
 102     stack_t             stack;
 103     unsigned int        extra_size; /* Should be 0 */
 104     qemu_siginfo_fpu_t  fpu_state;
 105 };
 106
 107 #define UREG_O0        16
 108 #define UREG_O6        22
 109 #define UREG_I0        0
 110 #define UREG_I1        1
 111 #define UREG_I2        2
 112 #define UREG_I3        3
 113 #define UREG_I4        4
 114 #define UREG_I5        5
 115 #define UREG_I6        6
 116 #define UREG_I7        7
 117 #define UREG_L0        8
 118 #define UREG_FP        UREG_I6
 119 #define UREG_SP        UREG_O6
 120
 121 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
 122                                      CPUSPARCState *env,
 123                                      unsigned long framesize)
 124 {
 125     abi_ulong sp = get_sp_from_cpustate(env);
 126
 127     /*
 128      * If we are on the alternate signal stack and would overflow it, don't.
 129      * Return an always-bogus address instead so we will die with SIGSEGV.
 130          */
 131     if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize))) {
 132             return -1;
 133     }
 134
 135     /* This is the X/Open sanctioned signal stack switching.  */
 136     sp = target_sigsp(sp, sa) - framesize;
 137
 138     /* Always align the stack frame.  This handles two cases.  First,
 139      * sigaltstack need not be mindful of platform specific stack
 140      * alignment.  Second, if we took this signal because the stack
 141      * is not aligned properly, we'd like to take the signal cleanly
 142      * and report that.
 143      */
 144     sp &= ~15UL;
 145
 146     return sp;
 147 }
 148
 149 static int
 150 setup___siginfo(__siginfo_t *si, CPUSPARCState *env, abi_ulong mask)
 151 {
 152     int err = 0, i;
 153
 154     __put_user(env->psr, &si->si_regs.psr);
 155     __put_user(env->pc, &si->si_regs.pc);
 156     __put_user(env->npc, &si->si_regs.npc);
 157     __put_user(env->y, &si->si_regs.y);
 158     for (i=0; i < 8; i++) {
 159         __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
 160     }
 161     for (i=0; i < 8; i++) {
 162         __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
 163     }
 164     __put_user(mask, &si->si_mask);
 165     return err;
 166 }
 167
 168 #if 0
 169 static int
 170 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
 171                  CPUSPARCState *env, unsigned long mask)
 172 {
 173     int err = 0;
 174
 175     __put_user(mask, &sc->sigc_mask);
 176     __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
 177     __put_user(env->pc, &sc->sigc_pc);
 178     __put_user(env->npc, &sc->sigc_npc);
 179     __put_user(env->psr, &sc->sigc_psr);
 180     __put_user(env->gregs[1], &sc->sigc_g1);
 181     __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
 182
 183     return err;
 184 }
 185 #endif
 186 #define NF_ALIGNEDSZ  (((sizeof(struct target_signal_frame) + 7) & (~7)))
 187
 188 void setup_frame(int sig, struct target_sigaction *ka,
 189                  target_sigset_t *set, CPUSPARCState *env)
 190 {
 191     abi_ulong sf_addr;
 192     struct target_signal_frame *sf;
 193     int sigframe_size, err, i;
 194
 195     /* 1. Make sure everything is clean */
 196     //synchronize_user_stack();
 197
 198     sigframe_size = NF_ALIGNEDSZ;
 199     sf_addr = get_sigframe(ka, env, sigframe_size);
 200     trace_user_setup_frame(env, sf_addr);
 201
 202     sf = lock_user(VERIFY_WRITE, sf_addr,
 203                    sizeof(struct target_signal_frame), 0);
 204     if (!sf) {
 205         goto sigsegv;
 206     }
 207 #if 0
 208     if (invalid_frame_pointer(sf, sigframe_size))
 209         goto sigill_and_return;
 210 #endif
 211     /* 2. Save the current process state */
 212     err = setup___siginfo(&sf->info, env, set->sig[0]);
 213     __put_user(0, &sf->extra_size);
 214
 215     //save_fpu_state(regs, &sf->fpu_state);
 216     //__put_user(&sf->fpu_state, &sf->fpu_save);
 217
 218     __put_user(set->sig[0], &sf->info.si_mask);
 219     for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
 220         __put_user(set->sig[i + 1], &sf->extramask[i]);
 221     }
 222
 223     for (i = 0; i < 8; i++) {
 224         __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
 225     }
 226     for (i = 0; i < 8; i++) {
 227         __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
 228     }
 229     if (err)
 230         goto sigsegv;
 231
 232     /* 3. signal handler back-trampoline and parameters */
 233     env->regwptr[UREG_FP] = sf_addr;
 234     env->regwptr[UREG_I0] = sig;
 235     env->regwptr[UREG_I1] = sf_addr +
 236             offsetof(struct target_signal_frame, info);
 237     env->regwptr[UREG_I2] = sf_addr +
 238             offsetof(struct target_signal_frame, info);
 239
 240     /* 4. signal handler */
 241     env->pc = ka->_sa_handler;
 242     env->npc = (env->pc + 4);
 243     /* 5. return to kernel instructions */
 244     if (ka->ka_restorer) {
 245         env->regwptr[UREG_I7] = ka->ka_restorer;
 246     } else {
 247         uint32_t val32;
 248
 249         env->regwptr[UREG_I7] = sf_addr +
 250                 offsetof(struct target_signal_frame, insns) - 2 * 4;
 251
 252         /* mov __NR_sigreturn, %g1 */
 253         val32 = 0x821020d8;
 254         __put_user(val32, &sf->insns[0]);
 255
 256         /* t 0x10 */
 257         val32 = 0x91d02010;
 258         __put_user(val32, &sf->insns[1]);
 259     }
 260     unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
 261     return;
 262 #if 0
 263 sigill_and_return:
 264     force_sig(TARGET_SIGILL);
 265 #endif
 266 sigsegv:
 267     unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
 268     force_sigsegv(sig);
 269 }
 270
 271 void setup_rt_frame(int sig, struct target_sigaction *ka,
 272                     target_siginfo_t *info,
 273                     target_sigset_t *set, CPUSPARCState *env)
 274 {
 275     qemu_log_mask(LOG_UNIMP, "setup_rt_frame: not implemented\n");
 276 }
 277
 278 long do_sigreturn(CPUSPARCState *env)
 279 {
 280     abi_ulong sf_addr;
 281     struct target_signal_frame *sf;
 282     uint32_t up_psr, pc, npc;
 283     target_sigset_t set;
 284     sigset_t host_set;
 285     int i;
 286
 287     sf_addr = env->regwptr[UREG_FP];
 288     trace_user_do_sigreturn(env, sf_addr);
 289     if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) {
 290         goto segv_and_exit;
 291     }
 292
 293     /* 1. Make sure we are not getting garbage from the user */
 294
 295     if (sf_addr & 3)
 296         goto segv_and_exit;
 297
 298     __get_user(pc,  &sf->info.si_regs.pc);
 299     __get_user(npc, &sf->info.si_regs.npc);
 300
 301     if ((pc | npc) & 3) {
 302         goto segv_and_exit;
 303     }
 304
 305     /* 2. Restore the state */
 306     __get_user(up_psr, &sf->info.si_regs.psr);
 307
 308     /* User can only change condition codes and FPU enabling in %psr. */
 309     env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
 310             | (env->psr & ~(PSR_ICC /* | PSR_EF */));
 311
 312     env->pc = pc;
 313     env->npc = npc;
 314     __get_user(env->y, &sf->info.si_regs.y);
 315     for (i=0; i < 8; i++) {
 316         __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
 317     }
 318     for (i=0; i < 8; i++) {
 319         __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
 320     }
 321
 322     /* FIXME: implement FPU save/restore:
 323      * __get_user(fpu_save, &sf->fpu_save);
 324      * if (fpu_save) {
 325      *     if (restore_fpu_state(env, fpu_save)) {
 326      *         goto segv_and_exit;
 327      *     }
 328      * }
 329      */
 330
 331     /* This is pretty much atomic, no amount locking would prevent
 332          * the races which exist anyways.
 333          */
 334     __get_user(set.sig[0], &sf->info.si_mask);
 335     for(i = 1; i < TARGET_NSIG_WORDS; i++) {
 336         __get_user(set.sig[i], &sf->extramask[i - 1]);
 337     }
 338
 339     target_to_host_sigset_internal(&host_set, &set);
 340     set_sigmask(&host_set);
 341
 342     unlock_user_struct(sf, sf_addr, 0);
 343     return -TARGET_QEMU_ESIGRETURN;
 344
 345 segv_and_exit:
 346     unlock_user_struct(sf, sf_addr, 0);
 347     force_sig(TARGET_SIGSEGV);
 348     return -TARGET_QEMU_ESIGRETURN;
 349 }
 350
 351 long do_rt_sigreturn(CPUSPARCState *env)
 352 {
 353     trace_user_do_rt_sigreturn(env, 0);
 354     qemu_log_mask(LOG_UNIMP, "do_rt_sigreturn: not implemented\n");
 355     return -TARGET_ENOSYS;
 356 }
 357
 358 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 359 #define SPARC_MC_TSTATE 0
 360 #define SPARC_MC_PC 1
 361 #define SPARC_MC_NPC 2
 362 #define SPARC_MC_Y 3
 363 #define SPARC_MC_G1 4
 364 #define SPARC_MC_G2 5
 365 #define SPARC_MC_G3 6
 366 #define SPARC_MC_G4 7
 367 #define SPARC_MC_G5 8
 368 #define SPARC_MC_G6 9
 369 #define SPARC_MC_G7 10
 370 #define SPARC_MC_O0 11
 371 #define SPARC_MC_O1 12
 372 #define SPARC_MC_O2 13
 373 #define SPARC_MC_O3 14
 374 #define SPARC_MC_O4 15
 375 #define SPARC_MC_O5 16
 376 #define SPARC_MC_O6 17
 377 #define SPARC_MC_O7 18
 378 #define SPARC_MC_NGREG 19
 379
 380 typedef abi_ulong target_mc_greg_t;
 381 typedef target_mc_greg_t target_mc_gregset_t[SPARC_MC_NGREG];
 382
 383 struct target_mc_fq {
 384     abi_ulong *mcfq_addr;
 385     uint32_t mcfq_insn;
 386 };
 387
 388 struct target_mc_fpu {
 389     union {
 390         uint32_t sregs[32];
 391         uint64_t dregs[32];
 392         //uint128_t qregs[16];
 393     } mcfpu_fregs;
 394     abi_ulong mcfpu_fsr;
 395     abi_ulong mcfpu_fprs;
 396     abi_ulong mcfpu_gsr;
 397     struct target_mc_fq *mcfpu_fq;
 398     unsigned char mcfpu_qcnt;
 399     unsigned char mcfpu_qentsz;
 400     unsigned char mcfpu_enab;
 401 };
 402 typedef struct target_mc_fpu target_mc_fpu_t;
 403
 404 typedef struct {
 405     target_mc_gregset_t mc_gregs;
 406     target_mc_greg_t mc_fp;
 407     target_mc_greg_t mc_i7;
 408     target_mc_fpu_t mc_fpregs;
 409 } target_mcontext_t;
 410
 411 struct target_ucontext {
 412     struct target_ucontext *tuc_link;
 413     abi_ulong tuc_flags;
 414     target_sigset_t tuc_sigmask;
 415     target_mcontext_t tuc_mcontext;
 416 };
 417
 418 /* A V9 register window */
 419 struct target_reg_window {
 420     abi_ulong locals[8];
 421     abi_ulong ins[8];
 422 };
 423
 424 #define TARGET_STACK_BIAS 2047
 425
 426 /* {set, get}context() needed for 64-bit SparcLinux userland. */
 427 void sparc64_set_context(CPUSPARCState *env)
 428 {
 429     abi_ulong ucp_addr;
 430     struct target_ucontext *ucp;
 431     target_mc_gregset_t *grp;
 432     abi_ulong pc, npc, tstate;
 433     abi_ulong fp, i7, w_addr;
 434     unsigned int i;
 435
 436     ucp_addr = env->regwptr[UREG_I0];
 437     if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) {
 438         goto do_sigsegv;
 439     }
 440     grp  = &ucp->tuc_mcontext.mc_gregs;
 441     __get_user(pc, &((*grp)[SPARC_MC_PC]));
 442     __get_user(npc, &((*grp)[SPARC_MC_NPC]));
 443     if ((pc | npc) & 3) {
 444         goto do_sigsegv;
 445     }
 446     if (env->regwptr[UREG_I1]) {
 447         target_sigset_t target_set;
 448         sigset_t set;
 449
 450         if (TARGET_NSIG_WORDS == 1) {
 451             __get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0]);
 452         } else {
 453             abi_ulong *src, *dst;
 454             src = ucp->tuc_sigmask.sig;
 455             dst = target_set.sig;
 456             for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
 457                 __get_user(*dst, src);
 458             }
 459         }
 460         target_to_host_sigset_internal(&set, &target_set);
 461         set_sigmask(&set);
 462     }
 463     env->pc = pc;
 464     env->npc = npc;
 465     __get_user(env->y, &((*grp)[SPARC_MC_Y]));
 466     __get_user(tstate, &((*grp)[SPARC_MC_TSTATE]));
 467     env->asi = (tstate >> 24) & 0xff;
 468     cpu_put_ccr(env, tstate >> 32);
 469     cpu_put_cwp64(env, tstate & 0x1f);
 470     __get_user(env->gregs[1], (&(*grp)[SPARC_MC_G1]));
 471     __get_user(env->gregs[2], (&(*grp)[SPARC_MC_G2]));
 472     __get_user(env->gregs[3], (&(*grp)[SPARC_MC_G3]));
 473     __get_user(env->gregs[4], (&(*grp)[SPARC_MC_G4]));
 474     __get_user(env->gregs[5], (&(*grp)[SPARC_MC_G5]));
 475     __get_user(env->gregs[6], (&(*grp)[SPARC_MC_G6]));
 476     __get_user(env->gregs[7], (&(*grp)[SPARC_MC_G7]));
 477     __get_user(env->regwptr[UREG_I0], (&(*grp)[SPARC_MC_O0]));
 478     __get_user(env->regwptr[UREG_I1], (&(*grp)[SPARC_MC_O1]));
 479     __get_user(env->regwptr[UREG_I2], (&(*grp)[SPARC_MC_O2]));
 480     __get_user(env->regwptr[UREG_I3], (&(*grp)[SPARC_MC_O3]));
 481     __get_user(env->regwptr[UREG_I4], (&(*grp)[SPARC_MC_O4]));
 482     __get_user(env->regwptr[UREG_I5], (&(*grp)[SPARC_MC_O5]));
 483     __get_user(env->regwptr[UREG_I6], (&(*grp)[SPARC_MC_O6]));
 484     __get_user(env->regwptr[UREG_I7], (&(*grp)[SPARC_MC_O7]));
 485
 486     __get_user(fp, &(ucp->tuc_mcontext.mc_fp));
 487     __get_user(i7, &(ucp->tuc_mcontext.mc_i7));
 488
 489     w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
 490     if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
 491                  abi_ulong) != 0) {
 492         goto do_sigsegv;
 493     }
 494     if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
 495                  abi_ulong) != 0) {
 496         goto do_sigsegv;
 497     }
 498     /* FIXME this does not match how the kernel handles the FPU in
 499      * its sparc64_set_context implementation. In particular the FPU
 500      * is only restored if fenab is non-zero in:
 501      *   __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab));
 502      */
 503     __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs));
 504     {
 505         uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
 506         for (i = 0; i < 64; i++, src++) {
 507             if (i & 1) {
 508                 __get_user(env->fpr[i/2].l.lower, src);
 509             } else {
 510                 __get_user(env->fpr[i/2].l.upper, src);
 511             }
 512         }
 513     }
 514     __get_user(env->fsr,
 515                &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr));
 516     __get_user(env->gsr,
 517                &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr));
 518     unlock_user_struct(ucp, ucp_addr, 0);
 519     return;
 520 do_sigsegv:
 521     unlock_user_struct(ucp, ucp_addr, 0);
 522     force_sig(TARGET_SIGSEGV);
 523 }
 524
 525 void sparc64_get_context(CPUSPARCState *env)
 526 {
 527     abi_ulong ucp_addr;
 528     struct target_ucontext *ucp;
 529     target_mc_gregset_t *grp;
 530     target_mcontext_t *mcp;
 531     abi_ulong fp, i7, w_addr;
 532     int err;
 533     unsigned int i;
 534     target_sigset_t target_set;
 535     sigset_t set;
 536
 537     ucp_addr = env->regwptr[UREG_I0];
 538     if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) {
 539         goto do_sigsegv;
 540     }
 541
 542     mcp = &ucp->tuc_mcontext;
 543     grp = &mcp->mc_gregs;
 544
 545     /* Skip over the trap instruction, first. */
 546     env->pc = env->npc;
 547     env->npc += 4;
 548
 549     /* If we're only reading the signal mask then do_sigprocmask()
 550      * is guaranteed not to fail, which is important because we don't
 551      * have any way to signal a failure or restart this operation since
 552      * this is not a normal syscall.
 553      */
 554     err = do_sigprocmask(0, NULL, &set);
 555     assert(err == 0);
 556     host_to_target_sigset_internal(&target_set, &set);
 557     if (TARGET_NSIG_WORDS == 1) {
 558         __put_user(target_set.sig[0],
 559                    (abi_ulong *)&ucp->tuc_sigmask);
 560     } else {
 561         abi_ulong *src, *dst;
 562         src = target_set.sig;
 563         dst = ucp->tuc_sigmask.sig;
 564         for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
 565             __put_user(*src, dst);
 566         }
 567         if (err)
 568             goto do_sigsegv;
 569     }
 570
 571     /* XXX: tstate must be saved properly */
 572     //    __put_user(env->tstate, &((*grp)[SPARC_MC_TSTATE]));
 573     __put_user(env->pc, &((*grp)[SPARC_MC_PC]));
 574     __put_user(env->npc, &((*grp)[SPARC_MC_NPC]));
 575     __put_user(env->y, &((*grp)[SPARC_MC_Y]));
 576     __put_user(env->gregs[1], &((*grp)[SPARC_MC_G1]));
 577     __put_user(env->gregs[2], &((*grp)[SPARC_MC_G2]));
 578     __put_user(env->gregs[3], &((*grp)[SPARC_MC_G3]));
 579     __put_user(env->gregs[4], &((*grp)[SPARC_MC_G4]));
 580     __put_user(env->gregs[5], &((*grp)[SPARC_MC_G5]));
 581     __put_user(env->gregs[6], &((*grp)[SPARC_MC_G6]));
 582     __put_user(env->gregs[7], &((*grp)[SPARC_MC_G7]));
 583     __put_user(env->regwptr[UREG_I0], &((*grp)[SPARC_MC_O0]));
 584     __put_user(env->regwptr[UREG_I1], &((*grp)[SPARC_MC_O1]));
 585     __put_user(env->regwptr[UREG_I2], &((*grp)[SPARC_MC_O2]));
 586     __put_user(env->regwptr[UREG_I3], &((*grp)[SPARC_MC_O3]));
 587     __put_user(env->regwptr[UREG_I4], &((*grp)[SPARC_MC_O4]));
 588     __put_user(env->regwptr[UREG_I5], &((*grp)[SPARC_MC_O5]));
 589     __put_user(env->regwptr[UREG_I6], &((*grp)[SPARC_MC_O6]));
 590     __put_user(env->regwptr[UREG_I7], &((*grp)[SPARC_MC_O7]));
 591
 592     w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
 593     fp = i7 = 0;
 594     if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
 595                  abi_ulong) != 0) {
 596         goto do_sigsegv;
 597     }
 598     if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
 599                  abi_ulong) != 0) {
 600         goto do_sigsegv;
 601     }
 602     __put_user(fp, &(mcp->mc_fp));
 603     __put_user(i7, &(mcp->mc_i7));
 604
 605     {
 606         uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
 607         for (i = 0; i < 64; i++, dst++) {
 608             if (i & 1) {
 609                 __put_user(env->fpr[i/2].l.lower, dst);
 610             } else {
 611                 __put_user(env->fpr[i/2].l.upper, dst);
 612             }
 613         }
 614     }
 615     __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
 616     __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
 617     __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
 618
 619     if (err)
 620         goto do_sigsegv;
 621     unlock_user_struct(ucp, ucp_addr, 1);
 622     return;
 623 do_sigsegv:
 624     unlock_user_struct(ucp, ucp_addr, 1);
 625     force_sig(TARGET_SIGSEGV);
 626 }
 627 #endif