arch/frv/kernel/ptrace.c

   1 /* ptrace.c: FRV specific parts of process tracing
   2  *
   3  * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  * - Derived from arch/m68k/kernel/ptrace.c
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version
  10  * 2 of the License, or (at your option) any later version.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/sched.h>
  15 #include <linux/mm.h>
  16 #include <linux/smp.h>
  17 #include <linux/errno.h>
  18 #include <linux/ptrace.h>
  19 #include <linux/user.h>
  20 #include <linux/security.h>
  21 #include <linux/signal.h>
  22
  23 #include <asm/uaccess.h>
  24 #include <asm/page.h>
  25 #include <asm/pgtable.h>
  26 #include <asm/system.h>
  27 #include <asm/processor.h>
  28 #include <asm/unistd.h>
  29
  30 /*
  31  * does not yet catch signals sent when the child dies.
  32  * in exit.c or in signal.c.
  33  */
  34
  35 /*
  36  * Get contents of register REGNO in task TASK.
  37  */
  38 static inline long get_reg(struct task_struct *task, int regno)
  39 {
  40         struct user_context *user = task->thread.user;
  41
  42         if (regno < 0 || regno >= PT__END)
  43                 return 0;
  44
  45         return ((unsigned long *) user)[regno];
  46 }
  47
  48 /*
  49  * Write contents of register REGNO in task TASK.
  50  */
  51 static inline int put_reg(struct task_struct *task, int regno,
  52                           unsigned long data)
  53 {
  54         struct user_context *user = task->thread.user;
  55
  56         if (regno < 0 || regno >= PT__END)
  57                 return -EIO;
  58
  59         switch (regno) {
  60         case PT_GR(0):
  61                 return 0;
  62         case PT_PSR:
  63         case PT__STATUS:
  64                 return -EIO;
  65         default:
  66                 ((unsigned long *) user)[regno] = data;
  67                 return 0;
  68         }
  69 }
  70
  71 /*
  72  * check that an address falls within the bounds of the target process's memory mappings
  73  */
  74 static inline int is_user_addr_valid(struct task_struct *child,
  75                                      unsigned long start, unsigned long len)
  76 {
  77 #ifdef CONFIG_MMU
  78         if (start >= PAGE_OFFSET || len > PAGE_OFFSET - start)
  79                 return -EIO;
  80         return 0;
  81 #else
  82         struct vm_list_struct *vml;
  83
  84         for (vml = child->mm->context.vmlist; vml; vml = vml->next)
  85                 if (start >= vml->vma->vm_start && start + len <= vml->vma->vm_end)
  86                         return 0;
  87
  88         return -EIO;
  89 #endif
  90 }
  91
  92 /*
  93  * Called by kernel/ptrace.c when detaching..
  94  *
  95  * Control h/w single stepping
  96  */
  97 void ptrace_disable(struct task_struct *child)
  98 {
  99         child->thread.frame0->__status &= ~REG__STATUS_STEP;
 100 }
 101
 102 void ptrace_enable(struct task_struct *child)
 103 {
 104         child->thread.frame0->__status |= REG__STATUS_STEP;
 105 }
 106
 107 long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 108 {
 109         unsigned long tmp;
 110         int ret;
 111
 112         switch (request) {
 113                 /* when I and D space are separate, these will need to be fixed. */
 114         case PTRACE_PEEKTEXT: /* read word at location addr. */
 115         case PTRACE_PEEKDATA: {
 116                 int copied;
 117
 118                 ret = -EIO;
 119                 if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0)
 120                         break;
 121
 122                 copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
 123                 if (copied != sizeof(tmp))
 124                         break;
 125
 126                 ret = put_user(tmp,(unsigned long *) data);
 127                 break;
 128         }
 129
 130                 /* read the word at location addr in the USER area. */
 131         case PTRACE_PEEKUSR: {
 132                 tmp = 0;
 133                 ret = -EIO;
 134                 if ((addr & 3) || addr < 0)
 135                         break;
 136
 137                 ret = 0;
 138                 switch (addr >> 2) {
 139                 case 0 ... PT__END - 1:
 140                         tmp = get_reg(child, addr >> 2);
 141                         break;
 142
 143                 case PT__END + 0:
 144                         tmp = child->mm->end_code - child->mm->start_code;
 145                         break;
 146
 147                 case PT__END + 1:
 148                         tmp = child->mm->end_data - child->mm->start_data;
 149                         break;
 150
 151                 case PT__END + 2:
 152                         tmp = child->mm->start_stack - child->mm->start_brk;
 153                         break;
 154
 155                 case PT__END + 3:
 156                         tmp = child->mm->start_code;
 157                         break;
 158
 159                 case PT__END + 4:
 160                         tmp = child->mm->start_stack;
 161                         break;
 162
 163                 default:
 164                         ret = -EIO;
 165                         break;
 166                 }
 167
 168                 if (ret == 0)
 169                         ret = put_user(tmp, (unsigned long *) data);
 170                 break;
 171         }
 172
 173                 /* when I and D space are separate, this will have to be fixed. */
 174         case PTRACE_POKETEXT: /* write the word at location addr. */
 175         case PTRACE_POKEDATA:
 176                 ret = -EIO;
 177                 if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0)
 178                         break;
 179                 if (access_process_vm(child, addr, &data, sizeof(data), 1) != sizeof(data))
 180                         break;
 181                 ret = 0;
 182                 break;
 183
 184         case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
 185                 ret = -EIO;
 186                 if ((addr & 3) || addr < 0)
 187                         break;
 188
 189                 ret = 0;
 190                 switch (addr >> 2) {
 191                 case 0 ... PT__END-1:
 192                         ret = put_reg(child, addr >> 2, data);
 193                         break;
 194
 195                 default:
 196                         ret = -EIO;
 197                         break;
 198                 }
 199                 break;
 200
 201         case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
 202         case PTRACE_CONT: /* restart after signal. */
 203                 ret = -EIO;
 204                 if (!valid_signal(data))
 205                         break;
 206                 if (request == PTRACE_SYSCALL)
 207                         set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 208                 else
 209                         clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 210                 child->exit_code = data;
 211                 ptrace_disable(child);
 212                 wake_up_process(child);
 213                 ret = 0;
 214                 break;
 215
 216                 /* make the child exit.  Best I can do is send it a sigkill.
 217                  * perhaps it should be put in the status that it wants to
 218                  * exit.
 219                  */
 220         case PTRACE_KILL:
 221                 ret = 0;
 222                 if (child->exit_state == EXIT_ZOMBIE)   /* already dead */
 223                         break;
 224                 child->exit_code = SIGKILL;
 225                 clear_tsk_thread_flag(child, TIF_SINGLESTEP);
 226                 ptrace_disable(child);
 227                 wake_up_process(child);
 228                 break;
 229
 230         case PTRACE_SINGLESTEP:  /* set the trap flag. */
 231                 ret = -EIO;
 232                 if (!valid_signal(data))
 233                         break;
 234                 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 235                 ptrace_enable(child);
 236                 child->exit_code = data;
 237                 wake_up_process(child);
 238                 ret = 0;
 239                 break;
 240
 241         case PTRACE_DETACH:     /* detach a process that was attached. */
 242                 ret = ptrace_detach(child, data);
 243                 break;
 244
 245         case PTRACE_GETREGS: { /* Get all integer regs from the child. */
 246                 int i;
 247                 for (i = 0; i < PT__GPEND; i++) {
 248                         tmp = get_reg(child, i);
 249                         if (put_user(tmp, (unsigned long *) data)) {
 250                                 ret = -EFAULT;
 251                                 break;
 252                         }
 253                         data += sizeof(long);
 254                 }
 255                 ret = 0;
 256                 break;
 257         }
 258
 259         case PTRACE_SETREGS: { /* Set all integer regs in the child. */
 260                 int i;
 261                 for (i = 0; i < PT__GPEND; i++) {
 262                         if (get_user(tmp, (unsigned long *) data)) {
 263                                 ret = -EFAULT;
 264                                 break;
 265                         }
 266                         put_reg(child, i, tmp);
 267                         data += sizeof(long);
 268                 }
 269                 ret = 0;
 270                 break;
 271         }
 272
 273         case PTRACE_GETFPREGS: { /* Get the child FP/Media state. */
 274                 ret = 0;
 275                 if (copy_to_user((void *) data,
 276                                  &child->thread.user->f,
 277                                  sizeof(child->thread.user->f)))
 278                         ret = -EFAULT;
 279                 break;
 280         }
 281
 282         case PTRACE_SETFPREGS: { /* Set the child FP/Media state. */
 283                 ret = 0;
 284                 if (copy_from_user(&child->thread.user->f,
 285                                    (void *) data,
 286                                    sizeof(child->thread.user->f)))
 287                         ret = -EFAULT;
 288                 break;
 289         }
 290
 291         case PTRACE_GETFDPIC:
 292                 tmp = 0;
 293                 switch (addr) {
 294                 case PTRACE_GETFDPIC_EXEC:
 295                         tmp = child->mm->context.exec_fdpic_loadmap;
 296                         break;
 297                 case PTRACE_GETFDPIC_INTERP:
 298                         tmp = child->mm->context.interp_fdpic_loadmap;
 299                         break;
 300                 default:
 301                         break;
 302                 }
 303
 304                 ret = 0;
 305                 if (put_user(tmp, (unsigned long *) data)) {
 306                         ret = -EFAULT;
 307                         break;
 308                 }
 309                 break;
 310
 311         default:
 312                 ret = -EIO;
 313                 break;
 314         }
 315         return ret;
 316 }
 317
 318 int __nongprelbss kstrace;
 319
 320 static const struct {
 321         const char      *name;
 322         unsigned        argmask;
 323 } __syscall_name_table[NR_syscalls] = {
 324         [0]     = { "restart_syscall"                   },
 325         [1]     = { "exit",             0x000001        },
 326         [2]     = { "fork",             0xffffff        },
 327         [3]     = { "read",             0x000141        },
 328         [4]     = { "write",            0x000141        },
 329         [5]     = { "open",             0x000235        },
 330         [6]     = { "close",            0x000001        },
 331         [7]     = { "waitpid",          0x000141        },
 332         [8]     = { "creat",            0x000025        },
 333         [9]     = { "link",             0x000055        },
 334         [10]    = { "unlink",           0x000005        },
 335         [11]    = { "execve",           0x000445        },
 336         [12]    = { "chdir",            0x000005        },
 337         [13]    = { "time",             0x000004        },
 338         [14]    = { "mknod",            0x000325        },
 339         [15]    = { "chmod",            0x000025        },
 340         [16]    = { "lchown",           0x000025        },
 341         [17]    = { "break" },
 342         [18]    = { "oldstat",          0x000045        },
 343         [19]    = { "lseek",            0x000131        },
 344         [20]    = { "getpid",           0xffffff        },
 345         [21]    = { "mount",            0x043555        },
 346         [22]    = { "umount",           0x000005        },
 347         [23]    = { "setuid",           0x000001        },
 348         [24]    = { "getuid",           0xffffff        },
 349         [25]    = { "stime",            0x000004        },
 350         [26]    = { "ptrace",           0x004413        },
 351         [27]    = { "alarm",            0x000001        },
 352         [28]    = { "oldfstat",         0x000041        },
 353         [29]    = { "pause",            0xffffff        },
 354         [30]    = { "utime",            0x000045        },
 355         [31]    = { "stty" },
 356         [32]    = { "gtty" },
 357         [33]    = { "access",           0x000025        },
 358         [34]    = { "nice",             0x000001        },
 359         [35]    = { "ftime" },
 360         [36]    = { "sync",             0xffffff        },
 361         [37]    = { "kill",             0x000011        },
 362         [38]    = { "rename",           0x000055        },
 363         [39]    = { "mkdir",            0x000025        },
 364         [40]    = { "rmdir",            0x000005        },
 365         [41]    = { "dup",              0x000001        },
 366         [42]    = { "pipe",             0x000004        },
 367         [43]    = { "times",            0x000004        },
 368         [44]    = { "prof" },
 369         [45]    = { "brk",              0x000004        },
 370         [46]    = { "setgid",           0x000001        },
 371         [47]    = { "getgid",           0xffffff        },
 372         [48]    = { "signal",           0x000041        },
 373         [49]    = { "geteuid",          0xffffff        },
 374         [50]    = { "getegid",          0xffffff        },
 375         [51]    = { "acct",             0x000005        },
 376         [52]    = { "umount2",          0x000035        },
 377         [53]    = { "lock" },
 378         [54]    = { "ioctl",            0x000331        },
 379         [55]    = { "fcntl",            0x000331        },
 380         [56]    = { "mpx" },
 381         [57]    = { "setpgid",          0x000011        },
 382         [58]    = { "ulimit" },
 383         [60]    = { "umask",            0x000002        },
 384         [61]    = { "chroot",           0x000005        },
 385         [62]    = { "ustat",            0x000043        },
 386         [63]    = { "dup2",             0x000011        },
 387         [64]    = { "getppid",          0xffffff        },
 388         [65]    = { "getpgrp",          0xffffff        },
 389         [66]    = { "setsid",           0xffffff        },
 390         [67]    = { "sigaction" },
 391         [68]    = { "sgetmask" },
 392         [69]    = { "ssetmask" },
 393         [70]    = { "setreuid" },
 394         [71]    = { "setregid" },
 395         [72]    = { "sigsuspend" },
 396         [73]    = { "sigpending" },
 397         [74]    = { "sethostname" },
 398         [75]    = { "setrlimit" },
 399         [76]    = { "getrlimit" },
 400         [77]    = { "getrusage" },
 401         [78]    = { "gettimeofday" },
 402         [79]    = { "settimeofday" },
 403         [80]    = { "getgroups" },
 404         [81]    = { "setgroups" },
 405         [82]    = { "select" },
 406         [83]    = { "symlink" },
 407         [84]    = { "oldlstat" },
 408         [85]    = { "readlink" },
 409         [86]    = { "uselib" },
 410         [87]    = { "swapon" },
 411         [88]    = { "reboot" },
 412         [89]    = { "readdir" },
 413         [91]    = { "munmap",           0x000034        },
 414         [92]    = { "truncate" },
 415         [93]    = { "ftruncate" },
 416         [94]    = { "fchmod" },
 417         [95]    = { "fchown" },
 418         [96]    = { "getpriority" },
 419         [97]    = { "setpriority" },
 420         [99]    = { "statfs" },
 421         [100]   = { "fstatfs" },
 422         [102]   = { "socketcall" },
 423         [103]   = { "syslog" },
 424         [104]   = { "setitimer" },
 425         [105]   = { "getitimer" },
 426         [106]   = { "stat" },
 427         [107]   = { "lstat" },
 428         [108]   = { "fstat" },
 429         [111]   = { "vhangup" },
 430         [114]   = { "wait4" },
 431         [115]   = { "swapoff" },
 432         [116]   = { "sysinfo" },
 433         [117]   = { "ipc" },
 434         [118]   = { "fsync" },
 435         [119]   = { "sigreturn" },
 436         [120]   = { "clone" },
 437         [121]   = { "setdomainname" },
 438         [122]   = { "uname" },
 439         [123]   = { "modify_ldt" },
 440         [123]   = { "cacheflush" },
 441         [124]   = { "adjtimex" },
 442         [125]   = { "mprotect" },
 443         [126]   = { "sigprocmask" },
 444         [127]   = { "create_module" },
 445         [128]   = { "init_module" },
 446         [129]   = { "delete_module" },
 447         [130]   = { "get_kernel_syms" },
 448         [131]   = { "quotactl" },
 449         [132]   = { "getpgid" },
 450         [133]   = { "fchdir" },
 451         [134]   = { "bdflush" },
 452         [135]   = { "sysfs" },
 453         [136]   = { "personality" },
 454         [137]   = { "afs_syscall" },
 455         [138]   = { "setfsuid" },
 456         [139]   = { "setfsgid" },
 457         [140]   = { "_llseek",                  0x014331        },
 458         [141]   = { "getdents" },
 459         [142]   = { "_newselect",               0x000141        },
 460         [143]   = { "flock" },
 461         [144]   = { "msync" },
 462         [145]   = { "readv" },
 463         [146]   = { "writev" },
 464         [147]   = { "getsid",                   0x000001        },
 465         [148]   = { "fdatasync",                0x000001        },
 466         [149]   = { "_sysctl",                  0x000004        },
 467         [150]   = { "mlock" },
 468         [151]   = { "munlock" },
 469         [152]   = { "mlockall" },
 470         [153]   = { "munlockall" },
 471         [154]   = { "sched_setparam" },
 472         [155]   = { "sched_getparam" },
 473         [156]   = { "sched_setscheduler" },
 474         [157]   = { "sched_getscheduler" },
 475         [158]   = { "sched_yield" },
 476         [159]   = { "sched_get_priority_max" },
 477         [160]   = { "sched_get_priority_min" },
 478         [161]   = { "sched_rr_get_interval" },
 479         [162]   = { "nanosleep",                0x000044        },
 480         [163]   = { "mremap" },
 481         [164]   = { "setresuid" },
 482         [165]   = { "getresuid" },
 483         [166]   = { "vm86" },
 484         [167]   = { "query_module" },
 485         [168]   = { "poll" },
 486         [169]   = { "nfsservctl" },
 487         [170]   = { "setresgid" },
 488         [171]   = { "getresgid" },
 489         [172]   = { "prctl",                    0x333331        },
 490         [173]   = { "rt_sigreturn",             0xffffff        },
 491         [174]   = { "rt_sigaction",             0x001441        },
 492         [175]   = { "rt_sigprocmask",           0x001441        },
 493         [176]   = { "rt_sigpending",            0x000014        },
 494         [177]   = { "rt_sigtimedwait",          0x001444        },
 495         [178]   = { "rt_sigqueueinfo",          0x000411        },
 496         [179]   = { "rt_sigsuspend",            0x000014        },
 497         [180]   = { "pread",                    0x003341        },
 498         [181]   = { "pwrite",                   0x003341        },
 499         [182]   = { "chown",                    0x000115        },
 500         [183]   = { "getcwd" },
 501         [184]   = { "capget" },
 502         [185]   = { "capset" },
 503         [186]   = { "sigaltstack" },
 504         [187]   = { "sendfile" },
 505         [188]   = { "getpmsg" },
 506         [189]   = { "putpmsg" },
 507         [190]   = { "vfork",                    0xffffff        },
 508         [191]   = { "ugetrlimit" },
 509         [192]   = { "mmap2",                    0x313314        },
 510         [193]   = { "truncate64" },
 511         [194]   = { "ftruncate64" },
 512         [195]   = { "stat64",                   0x000045        },
 513         [196]   = { "lstat64",                  0x000045        },
 514         [197]   = { "fstat64",                  0x000041        },
 515         [198]   = { "lchown32" },
 516         [199]   = { "getuid32",                 0xffffff        },
 517         [200]   = { "getgid32",                 0xffffff        },
 518         [201]   = { "geteuid32",                0xffffff        },
 519         [202]   = { "getegid32",                0xffffff        },
 520         [203]   = { "setreuid32" },
 521         [204]   = { "setregid32" },
 522         [205]   = { "getgroups32" },
 523         [206]   = { "setgroups32" },
 524         [207]   = { "fchown32" },
 525         [208]   = { "setresuid32" },
 526         [209]   = { "getresuid32" },
 527         [210]   = { "setresgid32" },
 528         [211]   = { "getresgid32" },
 529         [212]   = { "chown32" },
 530         [213]   = { "setuid32" },
 531         [214]   = { "setgid32" },
 532         [215]   = { "setfsuid32" },
 533         [216]   = { "setfsgid32" },
 534         [217]   = { "pivot_root" },
 535         [218]   = { "mincore" },
 536         [219]   = { "madvise" },
 537         [220]   = { "getdents64" },
 538         [221]   = { "fcntl64" },
 539         [223]   = { "security" },
 540         [224]   = { "gettid" },
 541         [225]   = { "readahead" },
 542         [226]   = { "setxattr" },
 543         [227]   = { "lsetxattr" },
 544         [228]   = { "fsetxattr" },
 545         [229]   = { "getxattr" },
 546         [230]   = { "lgetxattr" },
 547         [231]   = { "fgetxattr" },
 548         [232]   = { "listxattr" },
 549         [233]   = { "llistxattr" },
 550         [234]   = { "flistxattr" },
 551         [235]   = { "removexattr" },
 552         [236]   = { "lremovexattr" },
 553         [237]   = { "fremovexattr" },
 554         [238]   = { "tkill" },
 555         [239]   = { "sendfile64" },
 556         [240]   = { "futex" },
 557         [241]   = { "sched_setaffinity" },
 558         [242]   = { "sched_getaffinity" },
 559         [243]   = { "set_thread_area" },
 560         [244]   = { "get_thread_area" },
 561         [245]   = { "io_setup" },
 562         [246]   = { "io_destroy" },
 563         [247]   = { "io_getevents" },
 564         [248]   = { "io_submit" },
 565         [249]   = { "io_cancel" },
 566         [250]   = { "fadvise64" },
 567         [252]   = { "exit_group",               0x000001        },
 568         [253]   = { "lookup_dcookie" },
 569         [254]   = { "epoll_create" },
 570         [255]   = { "epoll_ctl" },
 571         [256]   = { "epoll_wait" },
 572         [257]   = { "remap_file_pages" },
 573         [258]   = { "set_tid_address" },
 574         [259]   = { "timer_create" },
 575         [260]   = { "timer_settime" },
 576         [261]   = { "timer_gettime" },
 577         [262]   = { "timer_getoverrun" },
 578         [263]   = { "timer_delete" },
 579         [264]   = { "clock_settime" },
 580         [265]   = { "clock_gettime" },
 581         [266]   = { "clock_getres" },
 582         [267]   = { "clock_nanosleep" },
 583         [268]   = { "statfs64" },
 584         [269]   = { "fstatfs64" },
 585         [270]   = { "tgkill" },
 586         [271]   = { "utimes" },
 587         [272]   = { "fadvise64_64" },
 588         [273]   = { "vserver" },
 589         [274]   = { "mbind" },
 590         [275]   = { "get_mempolicy" },
 591         [276]   = { "set_mempolicy" },
 592         [277]   = { "mq_open" },
 593         [278]   = { "mq_unlink" },
 594         [279]   = { "mq_timedsend" },
 595         [280]   = { "mq_timedreceive" },
 596         [281]   = { "mq_notify" },
 597         [282]   = { "mq_getsetattr" },
 598         [283]   = { "sys_kexec_load" },
 599 };
 600
 601 asmlinkage void do_syscall_trace(int leaving)
 602 {
 603 #if 0
 604         unsigned long *argp;
 605         const char *name;
 606         unsigned argmask;
 607         char buffer[16];
 608
 609         if (!kstrace)
 610                 return;
 611
 612         if (!current->mm)
 613                 return;
 614
 615         if (__frame->gr7 == __NR_close)
 616                 return;
 617
 618 #if 0
 619         if (__frame->gr7 != __NR_mmap2 &&
 620             __frame->gr7 != __NR_vfork &&
 621             __frame->gr7 != __NR_execve &&
 622             __frame->gr7 != __NR_exit)
 623                 return;
 624 #endif
 625
 626         argmask = 0;
 627         name = NULL;
 628         if (__frame->gr7 < NR_syscalls) {
 629                 name = __syscall_name_table[__frame->gr7].name;
 630                 argmask = __syscall_name_table[__frame->gr7].argmask;
 631         }
 632         if (!name) {
 633                 sprintf(buffer, "sys_%lx", __frame->gr7);
 634                 name = buffer;
 635         }
 636
 637         if (!leaving) {
 638                 if (!argmask) {
 639                         printk(KERN_CRIT "[%d] %s(%lx,%lx,%lx,%lx,%lx,%lx)\n",
 640                                current->pid,
 641                                name,
 642                                __frame->gr8,
 643                                __frame->gr9,
 644                                __frame->gr10,
 645                                __frame->gr11,
 646                                __frame->gr12,
 647                                __frame->gr13);
 648                 }
 649                 else if (argmask == 0xffffff) {
 650                         printk(KERN_CRIT "[%d] %s()\n",
 651                                current->pid,
 652                                name);
 653                 }
 654                 else {
 655                         printk(KERN_CRIT "[%d] %s(",
 656                                current->pid,
 657                                name);
 658
 659                         argp = &__frame->gr8;
 660
 661                         do {
 662                                 switch (argmask & 0xf) {
 663                                 case 1:
 664                                         printk("%ld", (long) *argp);
 665                                         break;
 666                                 case 2:
 667                                         printk("%lo", *argp);
 668                                         break;
 669                                 case 3:
 670                                         printk("%lx", *argp);
 671                                         break;
 672                                 case 4:
 673                                         printk("%p", (void *) *argp);
 674                                         break;
 675                                 case 5:
 676                                         printk("\"%s\"", (char *) *argp);
 677                                         break;
 678                                 }
 679
 680                                 argp++;
 681                                 argmask >>= 4;
 682                                 if (argmask)
 683                                         printk(",");
 684
 685                         } while (argmask);
 686
 687                         printk(")\n");
 688                 }
 689         }
 690         else {
 691                 if ((int)__frame->gr8 > -4096 && (int)__frame->gr8 < 4096)
 692                         printk(KERN_CRIT "[%d] %s() = %ld\n", current->pid, name, __frame->gr8);
 693                 else
 694                         printk(KERN_CRIT "[%d] %s() = %lx\n", current->pid, name, __frame->gr8);
 695         }
 696         return;
 697 #endif
 698
 699         if (!test_thread_flag(TIF_SYSCALL_TRACE))
 700                 return;
 701
 702         if (!(current->ptrace & PT_PTRACED))
 703                 return;
 704
 705         /* we need to indicate entry or exit to strace */
 706         if (leaving)
 707                 __frame->__status |= REG__STATUS_SYSC_EXIT;
 708         else
 709                 __frame->__status |= REG__STATUS_SYSC_ENTRY;
 710
 711         ptrace_notify(SIGTRAP);
 712
 713         /*
 714          * this isn't the same as continuing with a signal, but it will do
 715          * for normal use.  strace only continues with a signal if the
 716          * stopping signal is not SIGTRAP.  -brl
 717          */
 718         if (current->exit_code) {
 719                 send_sig(current->exit_code, current, 1);
 720                 current->exit_code = 0;
 721         }
 722 }