arch/mips/kernel/scall64-n32.S

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01 by Ralf Baechle
   7  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
   8  * Copyright (C) 2001 MIPS Technologies, Inc.
   9  */
  10 #include <linux/config.h>
  11 #include <linux/errno.h>
  12 #include <asm/asm.h>
  13 #include <asm/asmmacro.h>
  14 #include <asm/mipsregs.h>
  15 #include <asm/regdef.h>
  16 #include <asm/stackframe.h>
  17 #include <asm/thread_info.h>
  18 #include <asm/unistd.h>
  19
  20 /* This duplicates the definition from <linux/sched.h> */
  21 #define PT_TRACESYS     0x00000002      /* tracing system calls */
  22
  23 /* This duplicates the definition from <asm/signal.h> */
  24 #define SIGILL          4               /* Illegal instruction (ANSI).  */
  25
  26 #ifndef CONFIG_MIPS32_O32
  27 /* No O32, so define handle_sys here */
  28 #define handle_sysn32 handle_sys
  29 #endif
  30
  31         .align  5
  32 NESTED(handle_sysn32, PT_SIZE, sp)
  33 #ifndef CONFIG_MIPS32_O32
  34         .set    noat
  35         SAVE_SOME
  36         STI
  37         .set    at
  38 #endif
  39
  40         dsubu   t0, v0, __NR_N32_Linux  # check syscall number
  41         sltiu   t0, t0, __NR_N32_Linux_syscalls + 1
  42
  43 #ifndef CONFIG_MIPS32_O32
  44         ld      t1, PT_EPC(sp)          # skip syscall on return
  45         daddiu  t1, 4                   # skip to next instruction
  46         sd      t1, PT_EPC(sp)
  47 #endif
  48         beqz    t0, not_n32_scall
  49
  50         dsll    t0, v0, 3               # offset into table
  51         ld      t2, (sysn32_call_table - (__NR_N32_Linux * 8))(t0)
  52
  53         sd      a3, PT_R26(sp)          # save a3 for syscall restarting
  54
  55         li      t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
  56         LONG_L  t0, TI_FLAGS($28)       # syscall tracing enabled?
  57         and     t0, t1, t0
  58         bnez    t0, n32_syscall_trace_entry
  59
  60         jalr    t2                      # Do The Real Thing (TM)
  61
  62         li      t0, -EMAXERRNO - 1      # error?
  63         sltu    t0, t0, v0
  64         sd      t0, PT_R7(sp)           # set error flag
  65         beqz    t0, 1f
  66
  67         dnegu   v0                      # error
  68         sd      v0, PT_R0(sp)           # set flag for syscall restarting
  69 1:      sd      v0, PT_R2(sp)           # result
  70
  71         local_irq_disable               # make sure need_resched and
  72                                         # signals dont change between
  73                                         # sampling and return
  74         LONG_L  a2, TI_FLAGS($28)       # current->work
  75         li      t0, _TIF_ALLWORK_MASK
  76         and     t0, a2, t0
  77         bnez    t0, n32_syscall_exit_work
  78
  79         j       restore_partial
  80
  81 n32_syscall_exit_work:
  82         j       syscall_exit_work_partial
  83
  84 /* ------------------------------------------------------------------------ */
  85
  86 n32_syscall_trace_entry:
  87         SAVE_STATIC
  88         move    s0, t2
  89         move    a0, sp
  90         li      a1, 0
  91         jal     do_syscall_trace
  92
  93         move    t0, s0
  94         RESTORE_STATIC
  95         ld      a0, PT_R4(sp)           # Restore argument registers
  96         ld      a1, PT_R5(sp)
  97         ld      a2, PT_R6(sp)
  98         ld      a3, PT_R7(sp)
  99         ld      a4, PT_R8(sp)
 100         ld      a5, PT_R9(sp)
 101         jalr    t0
 102
 103         li      t0, -EMAXERRNO - 1      # error?
 104         sltu    t0, t0, v0
 105         sd      t0, PT_R7(sp)           # set error flag
 106         beqz    t0, 1f
 107
 108         dnegu   v0                      # error
 109         sd      v0, PT_R0(sp)           # set flag for syscall restarting
 110 1:      sd      v0, PT_R2(sp)           # result
 111
 112         j       syscall_exit
 113
 114 not_n32_scall:
 115         /* This is not an n32 compatibility syscall, pass it on to
 116            the n64 syscall handlers.  */
 117         j       handle_sys64
 118
 119         END(handle_sysn32)
 120
 121 EXPORT(sysn32_call_table)
 122         PTR     sys_read                        /* 6000 */
 123         PTR     sys_write
 124         PTR     sys_open
 125         PTR     sys_close
 126         PTR     sys_newstat
 127         PTR     sys_newfstat                    /* 6005 */
 128         PTR     sys_newlstat
 129         PTR     sys_poll
 130         PTR     sys_lseek
 131         PTR     old_mmap
 132         PTR     sys_mprotect                    /* 6010 */
 133         PTR     sys_munmap
 134         PTR     sys_brk
 135         PTR     sys32_rt_sigaction
 136         PTR     sys32_rt_sigprocmask
 137         PTR     compat_sys_ioctl                /* 6015 */
 138         PTR     sys_pread64
 139         PTR     sys_pwrite64
 140         PTR     compat_sys_readv
 141         PTR     compat_sys_writev
 142         PTR     sys_access                      /* 6020 */
 143         PTR     sys_pipe
 144         PTR     compat_sys_select
 145         PTR     sys_sched_yield
 146         PTR     sys_mremap
 147         PTR     sys_msync                       /* 6025 */
 148         PTR     sys_mincore
 149         PTR     sys_madvise
 150         PTR     sys_shmget
 151         PTR     sys32_shmat
 152         PTR     sys_shmctl                      /* 6030 */
 153         PTR     sys_dup
 154         PTR     sys_dup2
 155         PTR     sys_pause
 156         PTR     compat_sys_nanosleep
 157         PTR     compat_sys_getitimer            /* 6035 */
 158         PTR     compat_sys_setitimer
 159         PTR     sys_alarm
 160         PTR     sys_getpid
 161         PTR     sys32_sendfile
 162         PTR     sys_socket                      /* 6040 */
 163         PTR     sys_connect
 164         PTR     sys_accept
 165         PTR     sys_sendto
 166         PTR     sys_recvfrom
 167         PTR     compat_sys_sendmsg              /* 6045 */
 168         PTR     compat_sys_recvmsg
 169         PTR     sys_shutdown
 170         PTR     sys_bind
 171         PTR     sys_listen
 172         PTR     sys_getsockname                 /* 6050 */
 173         PTR     sys_getpeername
 174         PTR     sys_socketpair
 175         PTR     compat_sys_setsockopt
 176         PTR     sys_getsockopt
 177         PTR     sys_clone                       /* 6055 */
 178         PTR     sys_fork
 179         PTR     sys32_execve
 180         PTR     sys_exit
 181         PTR     compat_sys_wait4
 182         PTR     sys_kill                        /* 6060 */
 183         PTR     sys32_newuname
 184         PTR     sys_semget
 185         PTR     sys_semop
 186         PTR     sys_semctl
 187         PTR     sys_shmdt                       /* 6065 */
 188         PTR     sys_msgget
 189         PTR     sys_msgsnd
 190         PTR     sys_msgrcv
 191         PTR     sys_msgctl
 192         PTR     compat_sys_fcntl                /* 6070 */
 193         PTR     sys_flock
 194         PTR     sys_fsync
 195         PTR     sys_fdatasync
 196         PTR     sys_truncate
 197         PTR     sys_ftruncate                   /* 6075 */
 198         PTR     compat_sys_getdents
 199         PTR     sys_getcwd
 200         PTR     sys_chdir
 201         PTR     sys_fchdir
 202         PTR     sys_rename                      /* 6080 */
 203         PTR     sys_mkdir
 204         PTR     sys_rmdir
 205         PTR     sys_creat
 206         PTR     sys_link
 207         PTR     sys_unlink                      /* 6085 */
 208         PTR     sys_symlink
 209         PTR     sys_readlink
 210         PTR     sys_chmod
 211         PTR     sys_fchmod
 212         PTR     sys_chown                       /* 6090 */
 213         PTR     sys_fchown
 214         PTR     sys_lchown
 215         PTR     sys_umask
 216         PTR     sys32_gettimeofday
 217         PTR     compat_sys_getrlimit            /* 6095 */
 218         PTR     compat_sys_getrusage
 219         PTR     sys32_sysinfo
 220         PTR     compat_sys_times
 221         PTR     sys32_ptrace
 222         PTR     sys_getuid                      /* 6100 */
 223         PTR     sys_syslog
 224         PTR     sys_getgid
 225         PTR     sys_setuid
 226         PTR     sys_setgid
 227         PTR     sys_geteuid                     /* 6105 */
 228         PTR     sys_getegid
 229         PTR     sys_setpgid
 230         PTR     sys_getppid
 231         PTR     sys_getpgrp
 232         PTR     sys_setsid                      /* 6110 */
 233         PTR     sys_setreuid
 234         PTR     sys_setregid
 235         PTR     sys_getgroups
 236         PTR     sys_setgroups
 237         PTR     sys_setresuid                   /* 6115 */
 238         PTR     sys_getresuid
 239         PTR     sys_setresgid
 240         PTR     sys_getresgid
 241         PTR     sys_getpgid
 242         PTR     sys_setfsuid                    /* 6120 */
 243         PTR     sys_setfsgid
 244         PTR     sys_getsid
 245         PTR     sys_capget
 246         PTR     sys_capset
 247         PTR     sys32_rt_sigpending             /* 6125 */
 248         PTR     compat_sys_rt_sigtimedwait
 249         PTR     sys_rt_sigqueueinfo
 250         PTR     sysn32_rt_sigsuspend
 251         PTR     sys32_sigaltstack
 252         PTR     compat_sys_utime                /* 6130 */
 253         PTR     sys_mknod
 254         PTR     sys32_personality
 255         PTR     sys32_ustat
 256         PTR     compat_sys_statfs
 257         PTR     compat_sys_fstatfs              /* 6135 */
 258         PTR     sys_sysfs
 259         PTR     sys_getpriority
 260         PTR     sys_setpriority
 261         PTR     sys_sched_setparam
 262         PTR     sys_sched_getparam              /* 6140 */
 263         PTR     sys_sched_setscheduler
 264         PTR     sys_sched_getscheduler
 265         PTR     sys_sched_get_priority_max
 266         PTR     sys_sched_get_priority_min
 267         PTR     sys32_sched_rr_get_interval     /* 6145 */
 268         PTR     sys_mlock
 269         PTR     sys_munlock
 270         PTR     sys_mlockall
 271         PTR     sys_munlockall
 272         PTR     sys_vhangup                     /* 6150 */
 273         PTR     sys_pivot_root
 274         PTR     sys32_sysctl
 275         PTR     sys_prctl
 276         PTR     compat_sys_adjtimex
 277         PTR     compat_sys_setrlimit            /* 6155 */
 278         PTR     sys_chroot
 279         PTR     sys_sync
 280         PTR     sys_acct
 281         PTR     sys32_settimeofday
 282         PTR     sys_mount                       /* 6160 */
 283         PTR     sys_umount
 284         PTR     sys_swapon
 285         PTR     sys_swapoff
 286         PTR     sys_reboot
 287         PTR     sys_sethostname                 /* 6165 */
 288         PTR     sys_setdomainname
 289         PTR     sys_ni_syscall                  /* was create_module */
 290         PTR     sys_init_module
 291         PTR     sys_delete_module
 292         PTR     sys_ni_syscall                  /* 6170, was get_kernel_syms */
 293         PTR     sys_ni_syscall                  /* was query_module */
 294         PTR     sys_quotactl
 295         PTR     sys_nfsservctl
 296         PTR     sys_ni_syscall                  /* res. for getpmsg */
 297         PTR     sys_ni_syscall                  /* 6175  for putpmsg */
 298         PTR     sys_ni_syscall                  /* res. for afs_syscall */
 299         PTR     sys_ni_syscall                  /* res. for security */
 300         PTR     sys_gettid
 301         PTR     sys32_readahead
 302         PTR     sys_setxattr                    /* 6180 */
 303         PTR     sys_lsetxattr
 304         PTR     sys_fsetxattr
 305         PTR     sys_getxattr
 306         PTR     sys_lgetxattr
 307         PTR     sys_fgetxattr                   /* 6185 */
 308         PTR     sys_listxattr
 309         PTR     sys_llistxattr
 310         PTR     sys_flistxattr
 311         PTR     sys_removexattr
 312         PTR     sys_lremovexattr                /* 6190 */
 313         PTR     sys_fremovexattr
 314         PTR     sys_tkill
 315         PTR     sys_ni_syscall
 316         PTR     compat_sys_futex
 317         PTR     compat_sys_sched_setaffinity    /* 6195 */
 318         PTR     compat_sys_sched_getaffinity
 319         PTR     sys_cacheflush
 320         PTR     sys_cachectl
 321         PTR     sys_sysmips
 322         PTR     sys_io_setup                    /* 6200 */
 323         PTR     sys_io_destroy
 324         PTR     sys_io_getevents
 325         PTR     sys_io_submit
 326         PTR     sys_io_cancel
 327         PTR     sys_exit_group                  /* 6205 */
 328         PTR     sys_lookup_dcookie
 329         PTR     sys_epoll_create
 330         PTR     sys_epoll_ctl
 331         PTR     sys_epoll_wait
 332         PTR     sys_remap_file_pages            /* 6210 */
 333         PTR     sysn32_rt_sigreturn
 334         PTR     compat_sys_fcntl64
 335         PTR     sys_set_tid_address
 336         PTR     sys_restart_syscall
 337         PTR     sys_semtimedop                  /* 6215 */
 338         PTR     sys_fadvise64_64
 339         PTR     compat_sys_statfs64
 340         PTR     compat_sys_fstatfs64
 341         PTR     sys_sendfile64
 342         PTR     sys32_timer_create              /* 6220 */
 343         PTR     compat_sys_timer_settime
 344         PTR     compat_sys_timer_gettime
 345         PTR     sys_timer_getoverrun
 346         PTR     sys_timer_delete
 347         PTR     compat_sys_clock_settime                /* 6225 */
 348         PTR     compat_sys_clock_gettime
 349         PTR     compat_sys_clock_getres
 350         PTR     compat_sys_clock_nanosleep
 351         PTR     sys_tgkill
 352         PTR     compat_sys_utimes               /* 6230 */
 353         PTR     sys_ni_syscall                  /* sys_mbind */
 354         PTR     sys_ni_syscall                  /* sys_get_mempolicy */
 355         PTR     sys_ni_syscall                  /* sys_set_mempolicy */
 356         PTR     compat_sys_mq_open
 357         PTR     sys_mq_unlink                   /* 6235 */
 358         PTR     compat_sys_mq_timedsend
 359         PTR     compat_sys_mq_timedreceive
 360         PTR     compat_sys_mq_notify
 361         PTR     compat_sys_mq_getsetattr
 362         PTR     sys_ni_syscall                  /* 6240, sys_vserver */
 363         PTR     sysn32_waitid
 364         PTR     sys_ni_syscall                  /* available, was setaltroot */
 365         PTR     sys_add_key
 366         PTR     sys_request_key
 367         PTR     sys_keyctl                      /* 6245 */
 368         PTR     sys_set_thread_area
 369         PTR     sys_inotify_init
 370         PTR     sys_inotify_add_watch
 371         PTR     sys_inotify_rm_watch
 372         PTR     sys_migrate_pages               /* 6250 */
 373         PTR     sys_openat
 374         PTR     sys_mkdirat
 375         PTR     sys_mknodat
 376         PTR     sys_fchownat
 377         PTR     sys_futimesat                   /* 6255 */
 378         PTR     sys_newfstatat
 379         PTR     sys_unlinkat
 380         PTR     sys_renameat
 381         PTR     sys_linkat
 382         PTR     sys_symlinkat                   /* 6260 */
 383         PTR     sys_readlinkat
 384         PTR     sys_fchmodat
 385         PTR     sys_faccessat
 386         PTR     sys_pselect6
 387         PTR     sys_ppoll                       /* 6265 */
 388         PTR     sys_unshare