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     uint32_t            insns[2] QEMU_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     uint32_t            insns[2];
 102     stack_t             stack;
 103     unsigned int        extra_size; /* Should be 0 */
 104     qemu_siginfo_fpu_t  fpu_state;
 105 };
 106
 107 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
 108                                      CPUSPARCState *env,
 109                                      unsigned long framesize)
 110 {
 111     abi_ulong sp = get_sp_from_cpustate(env);
 112
 113     /*
 114      * If we are on the alternate signal stack and would overflow it, don't.
 115      * Return an always-bogus address instead so we will die with SIGSEGV.
 116          */
 117     if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize))) {
 118             return -1;
 119     }
 120
 121     /* This is the X/Open sanctioned signal stack switching.  */
 122     sp = target_sigsp(sp, sa) - framesize;
 123
 124     /* Always align the stack frame.  This handles two cases.  First,
 125      * sigaltstack need not be mindful of platform specific stack
 126      * alignment.  Second, if we took this signal because the stack
 127      * is not aligned properly, we'd like to take the signal cleanly
 128      * and report that.
 129      */
 130     sp &= ~15UL;
 131
 132     return sp;
 133 }
 134
 135 static int
 136 setup___siginfo(__siginfo_t *si, CPUSPARCState *env, abi_ulong mask)
 137 {
 138     int err = 0, i;
 139
 140     __put_user(env->psr, &si->si_regs.psr);
 141     __put_user(env->pc, &si->si_regs.pc);
 142     __put_user(env->npc, &si->si_regs.npc);
 143     __put_user(env->y, &si->si_regs.y);
 144     for (i=0; i < 8; i++) {
 145         __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
 146     }
 147     for (i=0; i < 8; i++) {
 148         __put_user(env->regwptr[WREG_O0 + i], &si->si_regs.u_regs[i + 8]);
 149     }
 150     __put_user(mask, &si->si_mask);
 151     return err;
 152 }
 153
 154 #define NF_ALIGNEDSZ  (((sizeof(struct target_signal_frame) + 7) & (~7)))
 155
 156 void setup_frame(int sig, struct target_sigaction *ka,
 157                  target_sigset_t *set, CPUSPARCState *env)
 158 {
 159     abi_ulong sf_addr;
 160     struct target_signal_frame *sf;
 161     int sigframe_size, err, i;
 162
 163     /* 1. Make sure everything is clean */
 164     //synchronize_user_stack();
 165
 166     sigframe_size = NF_ALIGNEDSZ;
 167     sf_addr = get_sigframe(ka, env, sigframe_size);
 168     trace_user_setup_frame(env, sf_addr);
 169
 170     sf = lock_user(VERIFY_WRITE, sf_addr,
 171                    sizeof(struct target_signal_frame), 0);
 172     if (!sf) {
 173         goto sigsegv;
 174     }
 175 #if 0
 176     if (invalid_frame_pointer(sf, sigframe_size))
 177         goto sigill_and_return;
 178 #endif
 179     /* 2. Save the current process state */
 180     err = setup___siginfo(&sf->info, env, set->sig[0]);
 181     __put_user(0, &sf->extra_size);
 182
 183     //save_fpu_state(regs, &sf->fpu_state);
 184     //__put_user(&sf->fpu_state, &sf->fpu_save);
 185
 186     __put_user(set->sig[0], &sf->info.si_mask);
 187     for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
 188         __put_user(set->sig[i + 1], &sf->extramask[i]);
 189     }
 190
 191     for (i = 0; i < 8; i++) {
 192         __put_user(env->regwptr[i + WREG_L0], &sf->ss.locals[i]);
 193     }
 194     for (i = 0; i < 8; i++) {
 195         __put_user(env->regwptr[i + WREG_I0], &sf->ss.ins[i]);
 196     }
 197     if (err)
 198         goto sigsegv;
 199
 200     /* 3. signal handler back-trampoline and parameters */
 201     env->regwptr[WREG_SP] = sf_addr;
 202     env->regwptr[WREG_O0] = sig;
 203     env->regwptr[WREG_O1] = sf_addr +
 204             offsetof(struct target_signal_frame, info);
 205     env->regwptr[WREG_O2] = sf_addr +
 206             offsetof(struct target_signal_frame, info);
 207
 208     /* 4. signal handler */
 209     env->pc = ka->_sa_handler;
 210     env->npc = (env->pc + 4);
 211     /* 5. return to kernel instructions */
 212     if (ka->ka_restorer) {
 213         env->regwptr[WREG_O7] = ka->ka_restorer;
 214     } else {
 215         uint32_t val32;
 216
 217         env->regwptr[WREG_O7] = sf_addr +
 218                 offsetof(struct target_signal_frame, insns) - 2 * 4;
 219
 220         /* mov __NR_sigreturn, %g1 */
 221         val32 = 0x821020d8;
 222         __put_user(val32, &sf->insns[0]);
 223
 224         /* t 0x10 */
 225         val32 = 0x91d02010;
 226         __put_user(val32, &sf->insns[1]);
 227     }
 228     unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
 229     return;
 230 #if 0
 231 sigill_and_return:
 232     force_sig(TARGET_SIGILL);
 233 #endif
 234 sigsegv:
 235     unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
 236     force_sigsegv(sig);
 237 }
 238
 239 void setup_rt_frame(int sig, struct target_sigaction *ka,
 240                     target_siginfo_t *info,
 241                     target_sigset_t *set, CPUSPARCState *env)
 242 {
 243     qemu_log_mask(LOG_UNIMP, "setup_rt_frame: not implemented\n");
 244 }
 245
 246 long do_sigreturn(CPUSPARCState *env)
 247 {
 248     abi_ulong sf_addr;
 249     struct target_signal_frame *sf;
 250     abi_ulong up_psr, pc, npc;
 251     target_sigset_t set;
 252     sigset_t host_set;
 253     int i;
 254
 255     sf_addr = env->regwptr[WREG_SP];
 256     trace_user_do_sigreturn(env, sf_addr);
 257     if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) {
 258         goto segv_and_exit;
 259     }
 260
 261     /* 1. Make sure we are not getting garbage from the user */
 262
 263     if (sf_addr & 3)
 264         goto segv_and_exit;
 265
 266     __get_user(pc,  &sf->info.si_regs.pc);
 267     __get_user(npc, &sf->info.si_regs.npc);
 268
 269     if ((pc | npc) & 3) {
 270         goto segv_and_exit;
 271     }
 272
 273     /* 2. Restore the state */
 274     __get_user(up_psr, &sf->info.si_regs.psr);
 275
 276     /* User can only change condition codes and FPU enabling in %psr. */
 277     env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
 278             | (env->psr & ~(PSR_ICC /* | PSR_EF */));
 279
 280     env->pc = pc;
 281     env->npc = npc;
 282     __get_user(env->y, &sf->info.si_regs.y);
 283     for (i=0; i < 8; i++) {
 284         __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
 285     }
 286     for (i=0; i < 8; i++) {
 287         __get_user(env->regwptr[i + WREG_O0], &sf->info.si_regs.u_regs[i + 8]);
 288     }
 289
 290     /* FIXME: implement FPU save/restore:
 291      * __get_user(fpu_save, &sf->fpu_save);
 292      * if (fpu_save) {
 293      *     if (restore_fpu_state(env, fpu_save)) {
 294      *         goto segv_and_exit;
 295      *     }
 296      * }
 297      */
 298
 299     /* This is pretty much atomic, no amount locking would prevent
 300          * the races which exist anyways.
 301          */
 302     __get_user(set.sig[0], &sf->info.si_mask);
 303     for(i = 1; i < TARGET_NSIG_WORDS; i++) {
 304         __get_user(set.sig[i], &sf->extramask[i - 1]);
 305     }
 306
 307     target_to_host_sigset_internal(&host_set, &set);
 308     set_sigmask(&host_set);
 309
 310     unlock_user_struct(sf, sf_addr, 0);
 311     return -TARGET_QEMU_ESIGRETURN;
 312
 313 segv_and_exit:
 314     unlock_user_struct(sf, sf_addr, 0);
 315     force_sig(TARGET_SIGSEGV);
 316     return -TARGET_QEMU_ESIGRETURN;
 317 }
 318
 319 long do_rt_sigreturn(CPUSPARCState *env)
 320 {
 321     trace_user_do_rt_sigreturn(env, 0);
 322     qemu_log_mask(LOG_UNIMP, "do_rt_sigreturn: not implemented\n");
 323     return -TARGET_ENOSYS;
 324 }
 325
 326 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 327 #define SPARC_MC_TSTATE 0
 328 #define SPARC_MC_PC 1
 329 #define SPARC_MC_NPC 2
 330 #define SPARC_MC_Y 3
 331 #define SPARC_MC_G1 4
 332 #define SPARC_MC_G2 5
 333 #define SPARC_MC_G3 6
 334 #define SPARC_MC_G4 7
 335 #define SPARC_MC_G5 8
 336 #define SPARC_MC_G6 9
 337 #define SPARC_MC_G7 10
 338 #define SPARC_MC_O0 11
 339 #define SPARC_MC_O1 12
 340 #define SPARC_MC_O2 13
 341 #define SPARC_MC_O3 14
 342 #define SPARC_MC_O4 15
 343 #define SPARC_MC_O5 16
 344 #define SPARC_MC_O6 17
 345 #define SPARC_MC_O7 18
 346 #define SPARC_MC_NGREG 19
 347
 348 typedef abi_ulong target_mc_greg_t;
 349 typedef target_mc_greg_t target_mc_gregset_t[SPARC_MC_NGREG];
 350
 351 struct target_mc_fq {
 352     abi_ulong mcfq_addr;
 353     uint32_t mcfq_insn;
 354 };
 355
 356 /*
 357  * Note the manual 16-alignment; the kernel gets this because it
 358  * includes a "long double qregs[16]" in the mcpu_fregs union,
 359  * which we can't do.
 360  */
 361 struct target_mc_fpu {
 362     union {
 363         uint32_t sregs[32];
 364         uint64_t dregs[32];
 365         //uint128_t qregs[16];
 366     } mcfpu_fregs;
 367     abi_ulong mcfpu_fsr;
 368     abi_ulong mcfpu_fprs;
 369     abi_ulong mcfpu_gsr;
 370     abi_ulong mcfpu_fq;
 371     unsigned char mcfpu_qcnt;
 372     unsigned char mcfpu_qentsz;
 373     unsigned char mcfpu_enab;
 374 } __attribute__((aligned(16)));
 375 typedef struct target_mc_fpu target_mc_fpu_t;
 376
 377 typedef struct {
 378     target_mc_gregset_t mc_gregs;
 379     target_mc_greg_t mc_fp;
 380     target_mc_greg_t mc_i7;
 381     target_mc_fpu_t mc_fpregs;
 382 } target_mcontext_t;
 383
 384 struct target_ucontext {
 385     abi_ulong tuc_link;
 386     abi_ulong tuc_flags;
 387     target_sigset_t tuc_sigmask;
 388     target_mcontext_t tuc_mcontext;
 389 };
 390
 391 /* A V9 register window */
 392 struct target_reg_window {
 393     abi_ulong locals[8];
 394     abi_ulong ins[8];
 395 };
 396
 397 #define TARGET_STACK_BIAS 2047
 398
 399 /* {set, get}context() needed for 64-bit SparcLinux userland. */
 400 void sparc64_set_context(CPUSPARCState *env)
 401 {
 402     abi_ulong ucp_addr;
 403     struct target_ucontext *ucp;
 404     target_mc_gregset_t *grp;
 405     abi_ulong pc, npc, tstate;
 406     unsigned int i;
 407
 408     ucp_addr = env->regwptr[WREG_O0];
 409     if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) {
 410         goto do_sigsegv;
 411     }
 412     grp  = &ucp->tuc_mcontext.mc_gregs;
 413     __get_user(pc, &((*grp)[SPARC_MC_PC]));
 414     __get_user(npc, &((*grp)[SPARC_MC_NPC]));
 415     if ((pc | npc) & 3) {
 416         goto do_sigsegv;
 417     }
 418     if (env->regwptr[WREG_O1]) {
 419         target_sigset_t target_set;
 420         sigset_t set;
 421
 422         if (TARGET_NSIG_WORDS == 1) {
 423             __get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0]);
 424         } else {
 425             abi_ulong *src, *dst;
 426             src = ucp->tuc_sigmask.sig;
 427             dst = target_set.sig;
 428             for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
 429                 __get_user(*dst, src);
 430             }
 431         }
 432         target_to_host_sigset_internal(&set, &target_set);
 433         set_sigmask(&set);
 434     }
 435     env->pc = pc;
 436     env->npc = npc;
 437     __get_user(env->y, &((*grp)[SPARC_MC_Y]));
 438     __get_user(tstate, &((*grp)[SPARC_MC_TSTATE]));
 439     env->asi = (tstate >> 24) & 0xff;
 440     cpu_put_ccr(env, tstate >> 32);
 441     cpu_put_cwp64(env, tstate & 0x1f);
 442     __get_user(env->gregs[1], (&(*grp)[SPARC_MC_G1]));
 443     __get_user(env->gregs[2], (&(*grp)[SPARC_MC_G2]));
 444     __get_user(env->gregs[3], (&(*grp)[SPARC_MC_G3]));
 445     __get_user(env->gregs[4], (&(*grp)[SPARC_MC_G4]));
 446     __get_user(env->gregs[5], (&(*grp)[SPARC_MC_G5]));
 447     __get_user(env->gregs[6], (&(*grp)[SPARC_MC_G6]));
 448     __get_user(env->gregs[7], (&(*grp)[SPARC_MC_G7]));
 449
 450     /*
 451      * Note that unlike the kernel, we didn't need to mess with the
 452      * guest register window state to save it into a pt_regs to run
 453      * the kernel. So for us the guest's O regs are still in WREG_O*
 454      * (unlike the kernel which has put them in UREG_I* in a pt_regs)
 455      * and the fp and i7 are still in WREG_I6 and WREG_I7 and don't
 456      * need to be written back to userspace memory.
 457      */
 458     __get_user(env->regwptr[WREG_O0], (&(*grp)[SPARC_MC_O0]));
 459     __get_user(env->regwptr[WREG_O1], (&(*grp)[SPARC_MC_O1]));
 460     __get_user(env->regwptr[WREG_O2], (&(*grp)[SPARC_MC_O2]));
 461     __get_user(env->regwptr[WREG_O3], (&(*grp)[SPARC_MC_O3]));
 462     __get_user(env->regwptr[WREG_O4], (&(*grp)[SPARC_MC_O4]));
 463     __get_user(env->regwptr[WREG_O5], (&(*grp)[SPARC_MC_O5]));
 464     __get_user(env->regwptr[WREG_O6], (&(*grp)[SPARC_MC_O6]));
 465     __get_user(env->regwptr[WREG_O7], (&(*grp)[SPARC_MC_O7]));
 466
 467     __get_user(env->regwptr[WREG_FP], &(ucp->tuc_mcontext.mc_fp));
 468     __get_user(env->regwptr[WREG_I7], &(ucp->tuc_mcontext.mc_i7));
 469
 470     /* FIXME this does not match how the kernel handles the FPU in
 471      * its sparc64_set_context implementation. In particular the FPU
 472      * is only restored if fenab is non-zero in:
 473      *   __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab));
 474      */
 475     __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs));
 476     {
 477         uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
 478         for (i = 0; i < 64; i++, src++) {
 479             if (i & 1) {
 480                 __get_user(env->fpr[i/2].l.lower, src);
 481             } else {
 482                 __get_user(env->fpr[i/2].l.upper, src);
 483             }
 484         }
 485     }
 486     __get_user(env->fsr,
 487                &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr));
 488     __get_user(env->gsr,
 489                &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr));
 490     unlock_user_struct(ucp, ucp_addr, 0);
 491     return;
 492 do_sigsegv:
 493     unlock_user_struct(ucp, ucp_addr, 0);
 494     force_sig(TARGET_SIGSEGV);
 495 }
 496
 497 void sparc64_get_context(CPUSPARCState *env)
 498 {
 499     abi_ulong ucp_addr;
 500     struct target_ucontext *ucp;
 501     target_mc_gregset_t *grp;
 502     target_mcontext_t *mcp;
 503     int err;
 504     unsigned int i;
 505     target_sigset_t target_set;
 506     sigset_t set;
 507
 508     ucp_addr = env->regwptr[WREG_O0];
 509     if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) {
 510         goto do_sigsegv;
 511     }
 512
 513     mcp = &ucp->tuc_mcontext;
 514     grp = &mcp->mc_gregs;
 515
 516     /* Skip over the trap instruction, first. */
 517     env->pc = env->npc;
 518     env->npc += 4;
 519
 520     /* If we're only reading the signal mask then do_sigprocmask()
 521      * is guaranteed not to fail, which is important because we don't
 522      * have any way to signal a failure or restart this operation since
 523      * this is not a normal syscall.
 524      */
 525     err = do_sigprocmask(0, NULL, &set);
 526     assert(err == 0);
 527     host_to_target_sigset_internal(&target_set, &set);
 528     if (TARGET_NSIG_WORDS == 1) {
 529         __put_user(target_set.sig[0],
 530                    (abi_ulong *)&ucp->tuc_sigmask);
 531     } else {
 532         abi_ulong *src, *dst;
 533         src = target_set.sig;
 534         dst = ucp->tuc_sigmask.sig;
 535         for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
 536             __put_user(*src, dst);
 537         }
 538         if (err)
 539             goto do_sigsegv;
 540     }
 541
 542     /* XXX: tstate must be saved properly */
 543     //    __put_user(env->tstate, &((*grp)[SPARC_MC_TSTATE]));
 544     __put_user(env->pc, &((*grp)[SPARC_MC_PC]));
 545     __put_user(env->npc, &((*grp)[SPARC_MC_NPC]));
 546     __put_user(env->y, &((*grp)[SPARC_MC_Y]));
 547     __put_user(env->gregs[1], &((*grp)[SPARC_MC_G1]));
 548     __put_user(env->gregs[2], &((*grp)[SPARC_MC_G2]));
 549     __put_user(env->gregs[3], &((*grp)[SPARC_MC_G3]));
 550     __put_user(env->gregs[4], &((*grp)[SPARC_MC_G4]));
 551     __put_user(env->gregs[5], &((*grp)[SPARC_MC_G5]));
 552     __put_user(env->gregs[6], &((*grp)[SPARC_MC_G6]));
 553     __put_user(env->gregs[7], &((*grp)[SPARC_MC_G7]));
 554
 555     /*
 556      * Note that unlike the kernel, we didn't need to mess with the
 557      * guest register window state to save it into a pt_regs to run
 558      * the kernel. So for us the guest's O regs are still in WREG_O*
 559      * (unlike the kernel which has put them in UREG_I* in a pt_regs)
 560      * and the fp and i7 are still in WREG_I6 and WREG_I7 and don't
 561      * need to be fished out of userspace memory.
 562      */
 563     __put_user(env->regwptr[WREG_O0], &((*grp)[SPARC_MC_O0]));
 564     __put_user(env->regwptr[WREG_O1], &((*grp)[SPARC_MC_O1]));
 565     __put_user(env->regwptr[WREG_O2], &((*grp)[SPARC_MC_O2]));
 566     __put_user(env->regwptr[WREG_O3], &((*grp)[SPARC_MC_O3]));
 567     __put_user(env->regwptr[WREG_O4], &((*grp)[SPARC_MC_O4]));
 568     __put_user(env->regwptr[WREG_O5], &((*grp)[SPARC_MC_O5]));
 569     __put_user(env->regwptr[WREG_O6], &((*grp)[SPARC_MC_O6]));
 570     __put_user(env->regwptr[WREG_O7], &((*grp)[SPARC_MC_O7]));
 571
 572     __put_user(env->regwptr[WREG_FP], &(mcp->mc_fp));
 573     __put_user(env->regwptr[WREG_I7], &(mcp->mc_i7));
 574
 575     {
 576         uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
 577         for (i = 0; i < 64; i++, dst++) {
 578             if (i & 1) {
 579                 __put_user(env->fpr[i/2].l.lower, dst);
 580             } else {
 581                 __put_user(env->fpr[i/2].l.upper, dst);
 582             }
 583         }
 584     }
 585     __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
 586     __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
 587     __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
 588
 589     if (err)
 590         goto do_sigsegv;
 591     unlock_user_struct(ucp, ucp_addr, 1);
 592     return;
 593 do_sigsegv:
 594     unlock_user_struct(ucp, ucp_addr, 1);
 595     force_sig(TARGET_SIGSEGV);
 596 }
 597 #endif