arch/mips/kernel/scall64-64.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, 02 by Ralf Baechle
   7  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
   8  * Copyright (C) 2001 MIPS Technologies, Inc.
   9  */
  10 #include <linux/errno.h>
  11 #include <asm/asm.h>
  12 #include <asm/asmmacro.h>
  13 #include <asm/irqflags.h>
  14 #include <asm/mipsregs.h>
  15 #include <asm/regdef.h>
  16 #include <asm/stackframe.h>
  17 #include <asm/asm-offsets.h>
  18 #include <asm/sysmips.h>
  19 #include <asm/thread_info.h>
  20 #include <asm/unistd.h>
  21 #include <asm/war.h>
  22
  23 #ifndef CONFIG_BINFMT_ELF32
  24 /* Neither O32 nor N32, so define handle_sys here */
  25 #define handle_sys64 handle_sys
  26 #endif
  27
  28         .align  5
  29 NESTED(handle_sys64, PT_SIZE, sp)
  30 #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
  31         /*
  32          * When 32-bit compatibility is configured scall_o32.S
  33          * already did this.
  34          */
  35         .set    noat
  36         SAVE_SOME
  37         TRACE_IRQS_ON_RELOAD
  38         STI
  39         .set    at
  40 #endif
  41
  42         dsubu   t0, v0, __NR_64_Linux   # check syscall number
  43         sltiu   t0, t0, __NR_64_Linux_syscalls + 1
  44 #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
  45         ld      t1, PT_EPC(sp)          # skip syscall on return
  46         daddiu  t1, 4                   # skip to next instruction
  47         sd      t1, PT_EPC(sp)
  48 #endif
  49         beqz    t0, illegal_syscall
  50
  51         dsll    t0, v0, 3               # offset into table
  52         ld      t2, (sys_call_table - (__NR_64_Linux * 8))(t0)
  53                                         # syscall routine
  54
  55         sd      a3, PT_R26(sp)          # save a3 for syscall restarting
  56
  57         li      t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
  58         LONG_L  t0, TI_FLAGS($28)       # syscall tracing enabled?
  59         and     t0, t1, t0
  60         bnez    t0, syscall_trace_entry
  61
  62         jalr    t2                      # Do The Real Thing (TM)
  63
  64         li      t0, -EMAXERRNO - 1      # error?
  65         sltu    t0, t0, v0
  66         sd      t0, PT_R7(sp)           # set error flag
  67         beqz    t0, 1f
  68
  69         dnegu   v0                      # error
  70         sd      v0, PT_R0(sp)           # set flag for syscall
  71                                         # restarting
  72 1:      sd      v0, PT_R2(sp)           # result
  73
  74 n64_syscall_exit:
  75         local_irq_disable               # make sure need_resched and
  76                                         # signals dont change between
  77                                         # sampling and return
  78         LONG_L  a2, TI_FLAGS($28)       # current->work
  79         li      t0, _TIF_ALLWORK_MASK
  80         and     t0, a2, t0
  81         bnez    t0, n64_syscall_exit_work
  82
  83         j       restore_partial
  84
  85 n64_syscall_exit_work:
  86         j       syscall_exit_work_partial
  87
  88 /* ------------------------------------------------------------------------ */
  89
  90 syscall_trace_entry:
  91         SAVE_STATIC
  92         move    s0, t2
  93         move    a0, sp
  94         li      a1, 0
  95         jal     do_syscall_trace
  96
  97         move    t0, s0
  98         RESTORE_STATIC
  99         ld      a0, PT_R4(sp)           # Restore argument registers
 100         ld      a1, PT_R5(sp)
 101         ld      a2, PT_R6(sp)
 102         ld      a3, PT_R7(sp)
 103         ld      a4, PT_R8(sp)
 104         ld      a5, PT_R9(sp)
 105         jalr    t0
 106
 107         li      t0, -EMAXERRNO - 1      # error?
 108         sltu    t0, t0, v0
 109         sd      t0, PT_R7(sp)           # set error flag
 110         beqz    t0, 1f
 111
 112         dnegu   v0                      # error
 113         sd      v0, PT_R0(sp)           # set flag for syscall restarting
 114 1:      sd      v0, PT_R2(sp)           # result
 115
 116         j       syscall_exit
 117
 118 illegal_syscall:
 119         /* This also isn't a 64-bit syscall, throw an error.  */
 120         li      v0, ENOSYS                      # error
 121         sd      v0, PT_R2(sp)
 122         li      t0, 1                           # set error flag
 123         sd      t0, PT_R7(sp)
 124         j       n64_syscall_exit
 125         END(handle_sys64)
 126
 127         LEAF(mips_atomic_set)
 128         andi    v0, a1, 3                       # must be word aligned
 129         bnez    v0, bad_alignment
 130
 131         LONG_L  v1, TI_ADDR_LIMIT($28)          # in legal address range?
 132         LONG_ADDIU      a0, a1, 4
 133         or      a0, a0, a1
 134         and     a0, a0, v1
 135         bltz    a0, bad_address
 136
 137 #ifdef CONFIG_CPU_HAS_LLSC
 138         /* Ok, this is the ll/sc case.  World is sane :-)  */
 139 1:      ll      v0, (a1)
 140         move    a0, a2
 141 2:      sc      a0, (a1)
 142 #if R10000_LLSC_WAR
 143         beqzl   a0, 1b
 144 #else
 145         beqz    a0, 1b
 146 #endif
 147
 148         .section __ex_table,"a"
 149         PTR     1b, bad_stack
 150         PTR     2b, bad_stack
 151         .previous
 152 #else
 153         sw      a1, 16(sp)
 154         sw      a2, 20(sp)
 155
 156         move    a0, sp
 157         move    a2, a1
 158         li      a1, 1
 159         jal     do_page_fault
 160
 161         lw      a1, 16(sp)
 162         lw      a2, 20(sp)
 163
 164         /*
 165          * At this point the page should be readable and writable unless
 166          * there was no more memory available.
 167          */
 168 1:      lw      v0, (a1)
 169 2:      sw      a2, (a1)
 170
 171         .section __ex_table,"a"
 172         PTR     1b, no_mem
 173         PTR     2b, no_mem
 174         .previous
 175 #endif
 176
 177         sd      zero, PT_R7(sp)         # success
 178         sd      v0, PT_R2(sp)           # result
 179
 180         j       n64_syscall_exit        # continue like a normal syscall
 181
 182 no_mem: li      v0, -ENOMEM
 183         jr      ra
 184
 185 bad_address:
 186         li      v0, -EFAULT
 187         jr      ra
 188
 189 bad_alignment:
 190         li      v0, -EINVAL
 191         jr      ra
 192         END(mips_atomic_set)
 193
 194         LEAF(sys_sysmips)
 195         beq     a0, MIPS_ATOMIC_SET, mips_atomic_set
 196         j       _sys_sysmips
 197         END(sys_sysmips)
 198
 199         .align  3
 200 sys_call_table:
 201         PTR     sys_read                        /* 5000 */
 202         PTR     sys_write
 203         PTR     sys_open
 204         PTR     sys_close
 205         PTR     sys_newstat
 206         PTR     sys_newfstat                    /* 5005 */
 207         PTR     sys_newlstat
 208         PTR     sys_poll
 209         PTR     sys_lseek
 210         PTR     sys_mips_mmap
 211         PTR     sys_mprotect                    /* 5010 */
 212         PTR     sys_munmap
 213         PTR     sys_brk
 214         PTR     sys_rt_sigaction
 215         PTR     sys_rt_sigprocmask
 216         PTR     sys_ioctl                       /* 5015 */
 217         PTR     sys_pread64
 218         PTR     sys_pwrite64
 219         PTR     sys_readv
 220         PTR     sys_writev
 221         PTR     sys_access                      /* 5020 */
 222         PTR     sysm_pipe
 223         PTR     sys_select
 224         PTR     sys_sched_yield
 225         PTR     sys_mremap
 226         PTR     sys_msync                       /* 5025 */
 227         PTR     sys_mincore
 228         PTR     sys_madvise
 229         PTR     sys_shmget
 230         PTR     sys_shmat
 231         PTR     sys_shmctl                      /* 5030 */
 232         PTR     sys_dup
 233         PTR     sys_dup2
 234         PTR     sys_pause
 235         PTR     sys_nanosleep
 236         PTR     sys_getitimer                   /* 5035 */
 237         PTR     sys_setitimer
 238         PTR     sys_alarm
 239         PTR     sys_getpid
 240         PTR     sys_sendfile64
 241         PTR     sys_socket                      /* 5040 */
 242         PTR     sys_connect
 243         PTR     sys_accept
 244         PTR     sys_sendto
 245         PTR     sys_recvfrom
 246         PTR     sys_sendmsg                     /* 5045 */
 247         PTR     sys_recvmsg
 248         PTR     sys_shutdown
 249         PTR     sys_bind
 250         PTR     sys_listen
 251         PTR     sys_getsockname                 /* 5050 */
 252         PTR     sys_getpeername
 253         PTR     sys_socketpair
 254         PTR     sys_setsockopt
 255         PTR     sys_getsockopt
 256         PTR     sys_clone                       /* 5055 */
 257         PTR     sys_fork
 258         PTR     sys_execve
 259         PTR     sys_exit
 260         PTR     sys_wait4
 261         PTR     sys_kill                        /* 5060 */
 262         PTR     sys_newuname
 263         PTR     sys_semget
 264         PTR     sys_semop
 265         PTR     sys_semctl
 266         PTR     sys_shmdt                       /* 5065 */
 267         PTR     sys_msgget
 268         PTR     sys_msgsnd
 269         PTR     sys_msgrcv
 270         PTR     sys_msgctl
 271         PTR     sys_fcntl                       /* 5070 */
 272         PTR     sys_flock
 273         PTR     sys_fsync
 274         PTR     sys_fdatasync
 275         PTR     sys_truncate
 276         PTR     sys_ftruncate                   /* 5075 */
 277         PTR     sys_getdents
 278         PTR     sys_getcwd
 279         PTR     sys_chdir
 280         PTR     sys_fchdir
 281         PTR     sys_rename                      /* 5080 */
 282         PTR     sys_mkdir
 283         PTR     sys_rmdir
 284         PTR     sys_creat
 285         PTR     sys_link
 286         PTR     sys_unlink                      /* 5085 */
 287         PTR     sys_symlink
 288         PTR     sys_readlink
 289         PTR     sys_chmod
 290         PTR     sys_fchmod
 291         PTR     sys_chown                       /* 5090 */
 292         PTR     sys_fchown
 293         PTR     sys_lchown
 294         PTR     sys_umask
 295         PTR     sys_gettimeofday
 296         PTR     sys_getrlimit                   /* 5095 */
 297         PTR     sys_getrusage
 298         PTR     sys_sysinfo
 299         PTR     sys_times
 300         PTR     sys_ptrace
 301         PTR     sys_getuid                      /* 5100 */
 302         PTR     sys_syslog
 303         PTR     sys_getgid
 304         PTR     sys_setuid
 305         PTR     sys_setgid
 306         PTR     sys_geteuid                     /* 5105 */
 307         PTR     sys_getegid
 308         PTR     sys_setpgid
 309         PTR     sys_getppid
 310         PTR     sys_getpgrp
 311         PTR     sys_setsid                      /* 5110 */
 312         PTR     sys_setreuid
 313         PTR     sys_setregid
 314         PTR     sys_getgroups
 315         PTR     sys_setgroups
 316         PTR     sys_setresuid                   /* 5115 */
 317         PTR     sys_getresuid
 318         PTR     sys_setresgid
 319         PTR     sys_getresgid
 320         PTR     sys_getpgid
 321         PTR     sys_setfsuid                    /* 5120 */
 322         PTR     sys_setfsgid
 323         PTR     sys_getsid
 324         PTR     sys_capget
 325         PTR     sys_capset
 326         PTR     sys_rt_sigpending               /* 5125 */
 327         PTR     sys_rt_sigtimedwait
 328         PTR     sys_rt_sigqueueinfo
 329         PTR     sys_rt_sigsuspend
 330         PTR     sys_sigaltstack
 331         PTR     sys_utime                       /* 5130 */
 332         PTR     sys_mknod
 333         PTR     sys_personality
 334         PTR     sys_ustat
 335         PTR     sys_statfs
 336         PTR     sys_fstatfs                     /* 5135 */
 337         PTR     sys_sysfs
 338         PTR     sys_getpriority
 339         PTR     sys_setpriority
 340         PTR     sys_sched_setparam
 341         PTR     sys_sched_getparam              /* 5140 */
 342         PTR     sys_sched_setscheduler
 343         PTR     sys_sched_getscheduler
 344         PTR     sys_sched_get_priority_max
 345         PTR     sys_sched_get_priority_min
 346         PTR     sys_sched_rr_get_interval       /* 5145 */
 347         PTR     sys_mlock
 348         PTR     sys_munlock
 349         PTR     sys_mlockall
 350         PTR     sys_munlockall
 351         PTR     sys_vhangup                     /* 5150 */
 352         PTR     sys_pivot_root
 353         PTR     sys_sysctl
 354         PTR     sys_prctl
 355         PTR     sys_adjtimex
 356         PTR     sys_setrlimit                   /* 5155 */
 357         PTR     sys_chroot
 358         PTR     sys_sync
 359         PTR     sys_acct
 360         PTR     sys_settimeofday
 361         PTR     sys_mount                       /* 5160 */
 362         PTR     sys_umount
 363         PTR     sys_swapon
 364         PTR     sys_swapoff
 365         PTR     sys_reboot
 366         PTR     sys_sethostname                 /* 5165 */
 367         PTR     sys_setdomainname
 368         PTR     sys_ni_syscall                  /* was create_module */
 369         PTR     sys_init_module
 370         PTR     sys_delete_module
 371         PTR     sys_ni_syscall                  /* 5170, was get_kernel_syms */
 372         PTR     sys_ni_syscall                  /* was query_module */
 373         PTR     sys_quotactl
 374         PTR     sys_nfsservctl
 375         PTR     sys_ni_syscall                  /* res. for getpmsg */
 376         PTR     sys_ni_syscall                  /* 5175  for putpmsg */
 377         PTR     sys_ni_syscall                  /* res. for afs_syscall */
 378         PTR     sys_ni_syscall                  /* res. for security */
 379         PTR     sys_gettid
 380         PTR     sys_readahead
 381         PTR     sys_setxattr                    /* 5180 */
 382         PTR     sys_lsetxattr
 383         PTR     sys_fsetxattr
 384         PTR     sys_getxattr
 385         PTR     sys_lgetxattr
 386         PTR     sys_fgetxattr                   /* 5185 */
 387         PTR     sys_listxattr
 388         PTR     sys_llistxattr
 389         PTR     sys_flistxattr
 390         PTR     sys_removexattr
 391         PTR     sys_lremovexattr                /* 5190 */
 392         PTR     sys_fremovexattr
 393         PTR     sys_tkill
 394         PTR     sys_ni_syscall
 395         PTR     sys_futex
 396         PTR     sys_sched_setaffinity           /* 5195 */
 397         PTR     sys_sched_getaffinity
 398         PTR     sys_cacheflush
 399         PTR     sys_cachectl
 400         PTR     sys_sysmips
 401         PTR     sys_io_setup                    /* 5200 */
 402         PTR     sys_io_destroy
 403         PTR     sys_io_getevents
 404         PTR     sys_io_submit
 405         PTR     sys_io_cancel
 406         PTR     sys_exit_group                  /* 5205 */
 407         PTR     sys_lookup_dcookie
 408         PTR     sys_epoll_create
 409         PTR     sys_epoll_ctl
 410         PTR     sys_epoll_wait
 411         PTR     sys_remap_file_pages            /* 5210 */
 412         PTR     sys_rt_sigreturn
 413         PTR     sys_set_tid_address
 414         PTR     sys_restart_syscall
 415         PTR     sys_semtimedop
 416         PTR     sys_fadvise64_64                /* 5215 */
 417         PTR     sys_timer_create
 418         PTR     sys_timer_settime
 419         PTR     sys_timer_gettime
 420         PTR     sys_timer_getoverrun
 421         PTR     sys_timer_delete                /* 5220 */
 422         PTR     sys_clock_settime
 423         PTR     sys_clock_gettime
 424         PTR     sys_clock_getres
 425         PTR     sys_clock_nanosleep
 426         PTR     sys_tgkill                      /* 5225 */
 427         PTR     sys_utimes
 428         PTR     sys_mbind
 429         PTR     sys_ni_syscall                  /* sys_get_mempolicy */
 430         PTR     sys_ni_syscall                  /* sys_set_mempolicy */
 431         PTR     sys_mq_open                     /* 5230 */
 432         PTR     sys_mq_unlink
 433         PTR     sys_mq_timedsend
 434         PTR     sys_mq_timedreceive
 435         PTR     sys_mq_notify
 436         PTR     sys_mq_getsetattr               /* 5235 */
 437         PTR     sys_ni_syscall                  /* sys_vserver */
 438         PTR     sys_waitid
 439         PTR     sys_ni_syscall                  /* available, was setaltroot */
 440         PTR     sys_add_key
 441         PTR     sys_request_key                 /* 5240 */
 442         PTR     sys_keyctl
 443         PTR     sys_set_thread_area
 444         PTR     sys_inotify_init
 445         PTR     sys_inotify_add_watch
 446         PTR     sys_inotify_rm_watch            /* 5245 */
 447         PTR     sys_migrate_pages
 448         PTR     sys_openat
 449         PTR     sys_mkdirat
 450         PTR     sys_mknodat
 451         PTR     sys_fchownat                    /* 5250 */
 452         PTR     sys_futimesat
 453         PTR     sys_newfstatat
 454         PTR     sys_unlinkat
 455         PTR     sys_renameat
 456         PTR     sys_linkat                      /* 5255 */
 457         PTR     sys_symlinkat
 458         PTR     sys_readlinkat
 459         PTR     sys_fchmodat
 460         PTR     sys_faccessat
 461         PTR     sys_pselect6                    /* 5260 */
 462         PTR     sys_ppoll
 463         PTR     sys_unshare
 464         PTR     sys_splice
 465         PTR     sys_sync_file_range
 466         PTR     sys_tee                         /* 5265 */
 467         PTR     sys_vmsplice
 468         PTR     sys_move_pages
 469         PTR     sys_set_robust_list
 470         PTR     sys_get_robust_list
 471         PTR     sys_kexec_load                  /* 5270 */
 472         PTR     sys_getcpu
 473         PTR     sys_epoll_pwait
 474         PTR     sys_ioprio_set
 475         PTR     sys_ioprio_get
 476         PTR     sys_utimensat                   /* 5275 */
 477         PTR     sys_signalfd
 478         PTR     sys_ni_syscall
 479         PTR     sys_eventfd
 480         PTR     sys_fallocate
 481         PTR     sys_timerfd_create              /* 5280 */
 482         PTR     sys_timerfd_gettime
 483         PTR     sys_timerfd_settime
 484         PTR     sys_signalfd4
 485         PTR     sys_eventfd2
 486         PTR     sys_epoll_create1               /* 5285 */
 487         PTR     sys_dup3
 488         PTR     sys_pipe2
 489         PTR     sys_inotify_init1
 490         PTR     sys_preadv
 491         PTR     sys_pwritev                     /* 5390 */
 492         PTR     sys_rt_tgsigqueueinfo
 493         PTR     sys_perf_counter_open
 494         .size   sys_call_table,.-sys_call_table