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 /* A Sparc register window */
  25 struct target_reg_window {
  26     abi_ulong locals[8];
  27     abi_ulong ins[8];
  28 };
  29
  30 /* A Sparc stack frame. */
  31 struct target_stackf {
  32     /*
  33      * Since qemu does not reference fp or callers_pc directly,
  34      * it's simpler to treat fp and callers_pc as elements of ins[],
  35      * and then bundle locals[] and ins[] into reg_window.
  36      */
  37     struct target_reg_window win;
  38     /*
  39      * Similarly, bundle structptr and xxargs into xargs[].
  40      * This portion of the struct is part of the function call abi,
  41      * and belongs to the callee for spilling argument registers.
  42      */
  43     abi_ulong xargs[8];
  44 };
  45
  46 struct target_siginfo_fpu {
  47     /* It is more convenient for qemu to move doubles, not singles. */
  48     uint64_t si_double_regs[16];
  49     uint32_t si_fsr;
  50     uint32_t si_fpqdepth;
  51     struct {
  52         uint32_t insn_addr;
  53         uint32_t insn;
  54     } si_fpqueue [16];
  55 };
  56
  57 struct target_signal_frame {
  58     struct target_stackf ss;
  59     struct target_pt_regs regs;
  60     uint32_t si_mask;
  61     abi_ulong fpu_save;
  62     uint32_t insns[2] QEMU_ALIGNED(8);
  63     abi_ulong extramask[TARGET_NSIG_WORDS - 1];
  64     abi_ulong extra_size; /* Should be 0 */
  65     abi_ulong rwin_save;
  66 };
  67
  68 static abi_ulong get_sigframe(struct target_sigaction *sa,
  69                               CPUSPARCState *env,
  70                               size_t framesize)
  71 {
  72     abi_ulong sp = get_sp_from_cpustate(env);
  73
  74     /*
  75      * If we are on the alternate signal stack and would overflow it, don't.
  76      * Return an always-bogus address instead so we will die with SIGSEGV.
  77      */
  78     if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize))) {
  79         return -1;
  80     }
  81
  82     /* This is the X/Open sanctioned signal stack switching.  */
  83     sp = target_sigsp(sp, sa) - framesize;
  84
  85     /*
  86      * Always align the stack frame.  This handles two cases.  First,
  87      * sigaltstack need not be mindful of platform specific stack
  88      * alignment.  Second, if we took this signal because the stack
  89      * is not aligned properly, we'd like to take the signal cleanly
  90      * and report that.
  91      */
  92     sp &= ~15UL;
  93
  94     return sp;
  95 }
  96
  97 static void save_pt_regs(struct target_pt_regs *regs, CPUSPARCState *env)
  98 {
  99     int i;
 100
 101 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 102     __put_user(sparc64_tstate(env), &regs->tstate);
 103     /* TODO: magic should contain PT_REG_MAGIC + %tt. */
 104     __put_user(0, &regs->magic);
 105 #else
 106     __put_user(cpu_get_psr(env), &regs->psr);
 107 #endif
 108
 109     __put_user(env->pc, &regs->pc);
 110     __put_user(env->npc, &regs->npc);
 111     __put_user(env->y, &regs->y);
 112
 113     for (i = 0; i < 8; i++) {
 114         __put_user(env->gregs[i], &regs->u_regs[i]);
 115     }
 116     for (i = 0; i < 8; i++) {
 117         __put_user(env->regwptr[WREG_O0 + i], &regs->u_regs[i + 8]);
 118     }
 119 }
 120
 121 static void restore_pt_regs(struct target_pt_regs *regs, CPUSPARCState *env)
 122 {
 123     int i;
 124
 125 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 126     /* User can only change condition codes and %asi in %tstate. */
 127     uint64_t tstate;
 128     __get_user(tstate, &regs->tstate);
 129     cpu_put_ccr(env, tstate >> 32);
 130     env->asi = extract64(tstate, 24, 8);
 131 #else
 132     /*
 133      * User can only change condition codes and FPU enabling in %psr.
 134      * But don't bother with FPU enabling, since a real kernel would
 135      * just re-enable the FPU upon the next fpu trap.
 136      */
 137     uint32_t psr;
 138     __get_user(psr, &regs->psr);
 139     env->psr = (psr & PSR_ICC) | (env->psr & ~PSR_ICC);
 140 #endif
 141
 142     /* Note that pc and npc are handled in the caller. */
 143
 144     __get_user(env->y, &regs->y);
 145
 146     for (i = 0; i < 8; i++) {
 147         __get_user(env->gregs[i], &regs->u_regs[i]);
 148     }
 149     for (i = 0; i < 8; i++) {
 150         __get_user(env->regwptr[WREG_O0 + i], &regs->u_regs[i + 8]);
 151     }
 152 }
 153
 154 static void save_reg_win(struct target_reg_window *win, CPUSPARCState *env)
 155 {
 156     int i;
 157
 158     for (i = 0; i < 8; i++) {
 159         __put_user(env->regwptr[i + WREG_L0], &win->locals[i]);
 160     }
 161     for (i = 0; i < 8; i++) {
 162         __put_user(env->regwptr[i + WREG_I0], &win->ins[i]);
 163     }
 164 }
 165
 166 static void save_fpu(struct target_siginfo_fpu *fpu, CPUSPARCState *env)
 167 {
 168     int i;
 169
 170     for (i = 0; i < 16; ++i) {
 171         __put_user(env->fpr[i].ll, &fpu->si_double_regs[i]);
 172     }
 173     __put_user(env->fsr, &fpu->si_fsr);
 174     __put_user(0, &fpu->si_fpqdepth);
 175 }
 176
 177 static void restore_fpu(struct target_siginfo_fpu *fpu, CPUSPARCState *env)
 178 {
 179     int i;
 180
 181     for (i = 0; i < 16; ++i) {
 182         __get_user(env->fpr[i].ll, &fpu->si_double_regs[i]);
 183     }
 184     __get_user(env->fsr, &fpu->si_fsr);
 185 }
 186
 187 void setup_frame(int sig, struct target_sigaction *ka,
 188                  target_sigset_t *set, CPUSPARCState *env)
 189 {
 190     abi_ulong sf_addr;
 191     struct target_signal_frame *sf;
 192     size_t sf_size = sizeof(*sf) + sizeof(struct target_siginfo_fpu);
 193     int i;
 194
 195     /* 1. Make sure everything is clean */
 196
 197     sf_addr = get_sigframe(ka, env, sf_size);
 198     trace_user_setup_frame(env, sf_addr);
 199
 200     sf = lock_user(VERIFY_WRITE, sf_addr, sf_size, 0);
 201     if (!sf) {
 202         goto sigsegv;
 203     }
 204
 205     /* 2. Save the current process state */
 206     save_pt_regs(&sf->regs, env);
 207     __put_user(0, &sf->extra_size);
 208
 209     save_fpu((struct target_siginfo_fpu *)(sf + 1), env);
 210     __put_user(sf_addr + sizeof(*sf), &sf->fpu_save);
 211
 212     __put_user(0, &sf->rwin_save);  /* TODO: save_rwin_state */
 213
 214     __put_user(set->sig[0], &sf->si_mask);
 215     for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
 216         __put_user(set->sig[i + 1], &sf->extramask[i]);
 217     }
 218
 219     save_reg_win(&sf->ss.win, env);
 220
 221     /* 3. signal handler back-trampoline and parameters */
 222     env->regwptr[WREG_SP] = sf_addr;
 223     env->regwptr[WREG_O0] = sig;
 224     env->regwptr[WREG_O1] = sf_addr +
 225             offsetof(struct target_signal_frame, regs);
 226     env->regwptr[WREG_O2] = sf_addr +
 227             offsetof(struct target_signal_frame, regs);
 228
 229     /* 4. signal handler */
 230     env->pc = ka->_sa_handler;
 231     env->npc = (env->pc + 4);
 232     /* 5. return to kernel instructions */
 233     if (ka->ka_restorer) {
 234         env->regwptr[WREG_O7] = ka->ka_restorer;
 235     } else {
 236         uint32_t val32;
 237
 238         env->regwptr[WREG_O7] = sf_addr +
 239                 offsetof(struct target_signal_frame, insns) - 2 * 4;
 240
 241         /* mov __NR_sigreturn, %g1 */
 242         val32 = 0x821020d8;
 243         __put_user(val32, &sf->insns[0]);
 244
 245         /* t 0x10 */
 246         val32 = 0x91d02010;
 247         __put_user(val32, &sf->insns[1]);
 248     }
 249     unlock_user(sf, sf_addr, sf_size);
 250     return;
 251 #if 0
 252 sigill_and_return:
 253     force_sig(TARGET_SIGILL);
 254 #endif
 255 sigsegv:
 256     unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
 257     force_sigsegv(sig);
 258 }
 259
 260 void setup_rt_frame(int sig, struct target_sigaction *ka,
 261                     target_siginfo_t *info,
 262                     target_sigset_t *set, CPUSPARCState *env)
 263 {
 264     qemu_log_mask(LOG_UNIMP, "setup_rt_frame: not implemented\n");
 265 }
 266
 267 long do_sigreturn(CPUSPARCState *env)
 268 {
 269     abi_ulong sf_addr;
 270     struct target_signal_frame *sf;
 271     abi_ulong pc, npc, ptr;
 272     target_sigset_t set;
 273     sigset_t host_set;
 274     int i;
 275
 276     sf_addr = env->regwptr[WREG_SP];
 277     trace_user_do_sigreturn(env, sf_addr);
 278     if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) {
 279         goto segv_and_exit;
 280     }
 281
 282     /* 1. Make sure we are not getting garbage from the user */
 283
 284     if (sf_addr & 3)
 285         goto segv_and_exit;
 286
 287     __get_user(pc,  &sf->regs.pc);
 288     __get_user(npc, &sf->regs.npc);
 289
 290     if ((pc | npc) & 3) {
 291         goto segv_and_exit;
 292     }
 293
 294     /* 2. Restore the state */
 295     restore_pt_regs(&sf->regs, env);
 296     env->pc = pc;
 297     env->npc = npc;
 298
 299     __get_user(ptr, &sf->fpu_save);
 300     if (ptr) {
 301         struct target_siginfo_fpu *fpu;
 302         if ((ptr & 3) || !lock_user_struct(VERIFY_READ, fpu, ptr, 1)) {
 303             goto segv_and_exit;
 304         }
 305         restore_fpu(fpu, env);
 306         unlock_user_struct(fpu, ptr, 0);
 307     }
 308
 309     __get_user(ptr, &sf->rwin_save);
 310     if (ptr) {
 311         goto segv_and_exit;  /* TODO: restore_rwin */
 312     }
 313
 314     __get_user(set.sig[0], &sf->si_mask);
 315     for (i = 1; i < TARGET_NSIG_WORDS; i++) {
 316         __get_user(set.sig[i], &sf->extramask[i - 1]);
 317     }
 318
 319     target_to_host_sigset_internal(&host_set, &set);
 320     set_sigmask(&host_set);
 321
 322     unlock_user_struct(sf, sf_addr, 0);
 323     return -TARGET_QEMU_ESIGRETURN;
 324
 325 segv_and_exit:
 326     unlock_user_struct(sf, sf_addr, 0);
 327     force_sig(TARGET_SIGSEGV);
 328     return -TARGET_QEMU_ESIGRETURN;
 329 }
 330
 331 long do_rt_sigreturn(CPUSPARCState *env)
 332 {
 333     trace_user_do_rt_sigreturn(env, 0);
 334     qemu_log_mask(LOG_UNIMP, "do_rt_sigreturn: not implemented\n");
 335     return -TARGET_ENOSYS;
 336 }
 337
 338 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 339 #define SPARC_MC_TSTATE 0
 340 #define SPARC_MC_PC 1
 341 #define SPARC_MC_NPC 2
 342 #define SPARC_MC_Y 3
 343 #define SPARC_MC_G1 4
 344 #define SPARC_MC_G2 5
 345 #define SPARC_MC_G3 6
 346 #define SPARC_MC_G4 7
 347 #define SPARC_MC_G5 8
 348 #define SPARC_MC_G6 9
 349 #define SPARC_MC_G7 10
 350 #define SPARC_MC_O0 11
 351 #define SPARC_MC_O1 12
 352 #define SPARC_MC_O2 13
 353 #define SPARC_MC_O3 14
 354 #define SPARC_MC_O4 15
 355 #define SPARC_MC_O5 16
 356 #define SPARC_MC_O6 17
 357 #define SPARC_MC_O7 18
 358 #define SPARC_MC_NGREG 19
 359
 360 typedef abi_ulong target_mc_greg_t;
 361 typedef target_mc_greg_t target_mc_gregset_t[SPARC_MC_NGREG];
 362
 363 struct target_mc_fq {
 364     abi_ulong mcfq_addr;
 365     uint32_t mcfq_insn;
 366 };
 367
 368 /*
 369  * Note the manual 16-alignment; the kernel gets this because it
 370  * includes a "long double qregs[16]" in the mcpu_fregs union,
 371  * which we can't do.
 372  */
 373 struct target_mc_fpu {
 374     union {
 375         uint32_t sregs[32];
 376         uint64_t dregs[32];
 377         //uint128_t qregs[16];
 378     } mcfpu_fregs;
 379     abi_ulong mcfpu_fsr;
 380     abi_ulong mcfpu_fprs;
 381     abi_ulong mcfpu_gsr;
 382     abi_ulong mcfpu_fq;
 383     unsigned char mcfpu_qcnt;
 384     unsigned char mcfpu_qentsz;
 385     unsigned char mcfpu_enab;
 386 } __attribute__((aligned(16)));
 387 typedef struct target_mc_fpu target_mc_fpu_t;
 388
 389 typedef struct {
 390     target_mc_gregset_t mc_gregs;
 391     target_mc_greg_t mc_fp;
 392     target_mc_greg_t mc_i7;
 393     target_mc_fpu_t mc_fpregs;
 394 } target_mcontext_t;
 395
 396 struct target_ucontext {
 397     abi_ulong tuc_link;
 398     abi_ulong tuc_flags;
 399     target_sigset_t tuc_sigmask;
 400     target_mcontext_t tuc_mcontext;
 401 };
 402
 403 /* {set, get}context() needed for 64-bit SparcLinux userland. */
 404 void sparc64_set_context(CPUSPARCState *env)
 405 {
 406     abi_ulong ucp_addr;
 407     struct target_ucontext *ucp;
 408     target_mc_gregset_t *grp;
 409     target_mc_fpu_t *fpup;
 410     abi_ulong pc, npc, tstate;
 411     unsigned int i;
 412     unsigned char fenab;
 413
 414     ucp_addr = env->regwptr[WREG_O0];
 415     if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) {
 416         goto do_sigsegv;
 417     }
 418     grp  = &ucp->tuc_mcontext.mc_gregs;
 419     __get_user(pc, &((*grp)[SPARC_MC_PC]));
 420     __get_user(npc, &((*grp)[SPARC_MC_NPC]));
 421     if ((pc | npc) & 3) {
 422         goto do_sigsegv;
 423     }
 424     if (env->regwptr[WREG_O1]) {
 425         target_sigset_t target_set;
 426         sigset_t set;
 427
 428         if (TARGET_NSIG_WORDS == 1) {
 429             __get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0]);
 430         } else {
 431             abi_ulong *src, *dst;
 432             src = ucp->tuc_sigmask.sig;
 433             dst = target_set.sig;
 434             for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
 435                 __get_user(*dst, src);
 436             }
 437         }
 438         target_to_host_sigset_internal(&set, &target_set);
 439         set_sigmask(&set);
 440     }
 441     env->pc = pc;
 442     env->npc = npc;
 443     __get_user(env->y, &((*grp)[SPARC_MC_Y]));
 444     __get_user(tstate, &((*grp)[SPARC_MC_TSTATE]));
 445     /* Honour TSTATE_ASI, TSTATE_ICC and TSTATE_XCC only */
 446     env->asi = (tstate >> 24) & 0xff;
 447     cpu_put_ccr(env, (tstate >> 32) & 0xff);
 448     __get_user(env->gregs[1], (&(*grp)[SPARC_MC_G1]));
 449     __get_user(env->gregs[2], (&(*grp)[SPARC_MC_G2]));
 450     __get_user(env->gregs[3], (&(*grp)[SPARC_MC_G3]));
 451     __get_user(env->gregs[4], (&(*grp)[SPARC_MC_G4]));
 452     __get_user(env->gregs[5], (&(*grp)[SPARC_MC_G5]));
 453     __get_user(env->gregs[6], (&(*grp)[SPARC_MC_G6]));
 454     /* Skip g7 as that's the thread register in userspace */
 455
 456     /*
 457      * Note that unlike the kernel, we didn't need to mess with the
 458      * guest register window state to save it into a pt_regs to run
 459      * the kernel. So for us the guest's O regs are still in WREG_O*
 460      * (unlike the kernel which has put them in UREG_I* in a pt_regs)
 461      * and the fp and i7 are still in WREG_I6 and WREG_I7 and don't
 462      * need to be written back to userspace memory.
 463      */
 464     __get_user(env->regwptr[WREG_O0], (&(*grp)[SPARC_MC_O0]));
 465     __get_user(env->regwptr[WREG_O1], (&(*grp)[SPARC_MC_O1]));
 466     __get_user(env->regwptr[WREG_O2], (&(*grp)[SPARC_MC_O2]));
 467     __get_user(env->regwptr[WREG_O3], (&(*grp)[SPARC_MC_O3]));
 468     __get_user(env->regwptr[WREG_O4], (&(*grp)[SPARC_MC_O4]));
 469     __get_user(env->regwptr[WREG_O5], (&(*grp)[SPARC_MC_O5]));
 470     __get_user(env->regwptr[WREG_O6], (&(*grp)[SPARC_MC_O6]));
 471     __get_user(env->regwptr[WREG_O7], (&(*grp)[SPARC_MC_O7]));
 472
 473     __get_user(env->regwptr[WREG_FP], &(ucp->tuc_mcontext.mc_fp));
 474     __get_user(env->regwptr[WREG_I7], &(ucp->tuc_mcontext.mc_i7));
 475
 476     fpup = &ucp->tuc_mcontext.mc_fpregs;
 477
 478     __get_user(fenab, &(fpup->mcfpu_enab));
 479     if (fenab) {
 480         abi_ulong fprs;
 481
 482         /*
 483          * We use the FPRS from the guest only in deciding whether
 484          * to restore the upper, lower, or both banks of the FPU regs.
 485          * The kernel here writes the FPU register data into the
 486          * process's current_thread_info state and unconditionally
 487          * clears FPRS and TSTATE_PEF: this disables the FPU so that the
 488          * next FPU-disabled trap will copy the data out of
 489          * current_thread_info and into the real FPU registers.
 490          * QEMU doesn't need to handle lazy-FPU-state-restoring like that,
 491          * so we always load the data directly into the FPU registers
 492          * and leave FPRS and TSTATE_PEF alone (so the FPU stays enabled).
 493          * Note that because we (and the kernel) always write zeroes for
 494          * the fenab and fprs in sparc64_get_context() none of this code
 495          * will execute unless the guest manually constructed or changed
 496          * the context structure.
 497          */
 498         __get_user(fprs, &(fpup->mcfpu_fprs));
 499         if (fprs & FPRS_DL) {
 500             for (i = 0; i < 16; i++) {
 501                 __get_user(env->fpr[i].ll, &(fpup->mcfpu_fregs.dregs[i]));
 502             }
 503         }
 504         if (fprs & FPRS_DU) {
 505             for (i = 16; i < 32; i++) {
 506                 __get_user(env->fpr[i].ll, &(fpup->mcfpu_fregs.dregs[i]));
 507             }
 508         }
 509         __get_user(env->fsr, &(fpup->mcfpu_fsr));
 510         __get_user(env->gsr, &(fpup->mcfpu_gsr));
 511     }
 512     unlock_user_struct(ucp, ucp_addr, 0);
 513     return;
 514 do_sigsegv:
 515     unlock_user_struct(ucp, ucp_addr, 0);
 516     force_sig(TARGET_SIGSEGV);
 517 }
 518
 519 void sparc64_get_context(CPUSPARCState *env)
 520 {
 521     abi_ulong ucp_addr;
 522     struct target_ucontext *ucp;
 523     target_mc_gregset_t *grp;
 524     target_mcontext_t *mcp;
 525     int err;
 526     unsigned int i;
 527     target_sigset_t target_set;
 528     sigset_t set;
 529
 530     ucp_addr = env->regwptr[WREG_O0];
 531     if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) {
 532         goto do_sigsegv;
 533     }
 534
 535     memset(ucp, 0, sizeof(*ucp));
 536
 537     mcp = &ucp->tuc_mcontext;
 538     grp = &mcp->mc_gregs;
 539
 540     /* Skip over the trap instruction, first. */
 541     env->pc = env->npc;
 542     env->npc += 4;
 543
 544     /* If we're only reading the signal mask then do_sigprocmask()
 545      * is guaranteed not to fail, which is important because we don't
 546      * have any way to signal a failure or restart this operation since
 547      * this is not a normal syscall.
 548      */
 549     err = do_sigprocmask(0, NULL, &set);
 550     assert(err == 0);
 551     host_to_target_sigset_internal(&target_set, &set);
 552     if (TARGET_NSIG_WORDS == 1) {
 553         __put_user(target_set.sig[0],
 554                    (abi_ulong *)&ucp->tuc_sigmask);
 555     } else {
 556         abi_ulong *src, *dst;
 557         src = target_set.sig;
 558         dst = ucp->tuc_sigmask.sig;
 559         for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
 560             __put_user(*src, dst);
 561         }
 562     }
 563
 564     __put_user(sparc64_tstate(env), &((*grp)[SPARC_MC_TSTATE]));
 565     __put_user(env->pc, &((*grp)[SPARC_MC_PC]));
 566     __put_user(env->npc, &((*grp)[SPARC_MC_NPC]));
 567     __put_user(env->y, &((*grp)[SPARC_MC_Y]));
 568     __put_user(env->gregs[1], &((*grp)[SPARC_MC_G1]));
 569     __put_user(env->gregs[2], &((*grp)[SPARC_MC_G2]));
 570     __put_user(env->gregs[3], &((*grp)[SPARC_MC_G3]));
 571     __put_user(env->gregs[4], &((*grp)[SPARC_MC_G4]));
 572     __put_user(env->gregs[5], &((*grp)[SPARC_MC_G5]));
 573     __put_user(env->gregs[6], &((*grp)[SPARC_MC_G6]));
 574     __put_user(env->gregs[7], &((*grp)[SPARC_MC_G7]));
 575
 576     /*
 577      * Note that unlike the kernel, we didn't need to mess with the
 578      * guest register window state to save it into a pt_regs to run
 579      * the kernel. So for us the guest's O regs are still in WREG_O*
 580      * (unlike the kernel which has put them in UREG_I* in a pt_regs)
 581      * and the fp and i7 are still in WREG_I6 and WREG_I7 and don't
 582      * need to be fished out of userspace memory.
 583      */
 584     __put_user(env->regwptr[WREG_O0], &((*grp)[SPARC_MC_O0]));
 585     __put_user(env->regwptr[WREG_O1], &((*grp)[SPARC_MC_O1]));
 586     __put_user(env->regwptr[WREG_O2], &((*grp)[SPARC_MC_O2]));
 587     __put_user(env->regwptr[WREG_O3], &((*grp)[SPARC_MC_O3]));
 588     __put_user(env->regwptr[WREG_O4], &((*grp)[SPARC_MC_O4]));
 589     __put_user(env->regwptr[WREG_O5], &((*grp)[SPARC_MC_O5]));
 590     __put_user(env->regwptr[WREG_O6], &((*grp)[SPARC_MC_O6]));
 591     __put_user(env->regwptr[WREG_O7], &((*grp)[SPARC_MC_O7]));
 592
 593     __put_user(env->regwptr[WREG_FP], &(mcp->mc_fp));
 594     __put_user(env->regwptr[WREG_I7], &(mcp->mc_i7));
 595
 596     /*
 597      * We don't write out the FPU state. This matches the kernel's
 598      * implementation (which has the code for doing this but
 599      * hidden behind an "if (fenab)" where fenab is always 0).
 600      */
 601
 602     unlock_user_struct(ucp, ucp_addr, 1);
 603     return;
 604 do_sigsegv:
 605     unlock_user_struct(ucp, ucp_addr, 1);
 606     force_sig(TARGET_SIGSEGV);
 607 }
 608 #endif