arch/ia64/ia32/ia32_entry.S

   1 #include <asm/asmmacro.h>
   2 #include <asm/ia32.h>
   3 #include <asm/asm-offsets.h>
   4 #include <asm/signal.h>
   5 #include <asm/thread_info.h>
   6
   7 #include "../kernel/minstate.h"
   8
   9         /*
  10          * execve() is special because in case of success, we need to
  11          * setup a null register window frame (in case an IA-32 process
  12          * is exec'ing an IA-64 program).
  13          */
  14 ENTRY(ia32_execve)
  15         .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(3)
  16         alloc loc1=ar.pfs,3,2,4,0
  17         mov loc0=rp
  18         .body
  19         zxt4 out0=in0                   // filename
  20         ;;                              // stop bit between alloc and call
  21         zxt4 out1=in1                   // argv
  22         zxt4 out2=in2                   // envp
  23         add out3=16,sp                  // regs
  24         br.call.sptk.few rp=sys32_execve
  25 1:      cmp.ge p6,p0=r8,r0
  26         mov ar.pfs=loc1                 // restore ar.pfs
  27         ;;
  28 (p6)    mov ar.pfs=r0                   // clear ar.pfs in case of success
  29         sxt4 r8=r8                      // return 64-bit result
  30         mov rp=loc0
  31         br.ret.sptk.few rp
  32 END(ia32_execve)
  33
  34 ENTRY(ia32_clone)
  35         .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(5)
  36         alloc r16=ar.pfs,5,2,6,0
  37         DO_SAVE_SWITCH_STACK
  38         mov loc0=rp
  39         mov loc1=r16                            // save ar.pfs across do_fork
  40         .body
  41         zxt4 out1=in1                           // newsp
  42         mov out3=16                             // stacksize (compensates for 16-byte scratch area)
  43         adds out2=IA64_SWITCH_STACK_SIZE+16,sp  // out2 = &regs
  44         mov out0=in0                            // out0 = clone_flags
  45         zxt4 out4=in2                           // out4 = parent_tidptr
  46         zxt4 out5=in4                           // out5 = child_tidptr
  47         br.call.sptk.many rp=do_fork
  48 .ret0:  .restore sp
  49         adds sp=IA64_SWITCH_STACK_SIZE,sp       // pop the switch stack
  50         mov ar.pfs=loc1
  51         mov rp=loc0
  52         br.ret.sptk.many rp
  53 END(ia32_clone)
  54
  55 ENTRY(sys32_rt_sigsuspend)
  56         .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
  57         alloc loc1=ar.pfs,8,2,3,0               // preserve all eight input regs
  58         mov loc0=rp
  59         mov out0=in0                            // mask
  60         mov out1=in1                            // sigsetsize
  61         mov out2=sp                             // out2 = &sigscratch
  62         .fframe 16
  63         adds sp=-16,sp                          // allocate dummy "sigscratch"
  64         ;;
  65         .body
  66         br.call.sptk.many rp=ia32_rt_sigsuspend
  67 1:      .restore sp
  68         adds sp=16,sp
  69         mov rp=loc0
  70         mov ar.pfs=loc1
  71         br.ret.sptk.many rp
  72 END(sys32_rt_sigsuspend)
  73
  74 ENTRY(sys32_sigsuspend)
  75         .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
  76         alloc loc1=ar.pfs,8,2,3,0               // preserve all eight input regs
  77         mov loc0=rp
  78         mov out0=in2                            // mask (first two args are ignored)
  79         ;;
  80         mov out1=sp                             // out1 = &sigscratch
  81         .fframe 16
  82         adds sp=-16,sp                          // allocate dummy "sigscratch"
  83         .body
  84         br.call.sptk.many rp=ia32_sigsuspend
  85 1:      .restore sp
  86         adds sp=16,sp
  87         mov rp=loc0
  88         mov ar.pfs=loc1
  89         br.ret.sptk.many rp
  90 END(sys32_sigsuspend)
  91
  92 GLOBAL_ENTRY(ia32_ret_from_clone)
  93         PT_REGS_UNWIND_INFO(0)
  94 {       /*
  95          * Some versions of gas generate bad unwind info if the first instruction of a
  96          * procedure doesn't go into the first slot of a bundle.  This is a workaround.
  97          */
  98         nop.m 0
  99         nop.i 0
 100         /*
 101          * We need to call schedule_tail() to complete the scheduling process.
 102          * Called by ia64_switch_to after do_fork()->copy_thread().  r8 contains the
 103          * address of the previously executing task.
 104          */
 105         br.call.sptk.many rp=ia64_invoke_schedule_tail
 106 }
 107 .ret1:
 108         adds r2=TI_FLAGS+IA64_TASK_SIZE,r13
 109         ;;
 110         ld4 r2=[r2]
 111         ;;
 112         mov r8=0
 113         and r2=_TIF_SYSCALL_TRACEAUDIT,r2
 114         ;;
 115         cmp.ne p6,p0=r2,r0
 116 (p6)    br.cond.spnt .ia32_strace_check_retval
 117         ;;                                      // prevent RAW on r8
 118 END(ia32_ret_from_clone)
 119         // fall thrugh
 120 GLOBAL_ENTRY(ia32_ret_from_syscall)
 121         PT_REGS_UNWIND_INFO(0)
 122
 123         cmp.ge p6,p7=r8,r0                      // syscall executed successfully?
 124         adds r2=IA64_PT_REGS_R8_OFFSET+16,sp    // r2 = &pt_regs.r8
 125         ;;
 126         alloc r3=ar.pfs,0,0,0,0                 // drop the syscall argument frame
 127         st8 [r2]=r8                             // store return value in slot for r8
 128         br.cond.sptk.many ia64_leave_kernel
 129 END(ia32_ret_from_syscall)
 130
 131         //
 132         // Invoke a system call, but do some tracing before and after the call.
 133         // We MUST preserve the current register frame throughout this routine
 134         // because some system calls (such as ia64_execve) directly
 135         // manipulate ar.pfs.
 136         //
 137         // Input:
 138         //      r8 = syscall number
 139         //      b6 = syscall entry point
 140         //
 141 GLOBAL_ENTRY(ia32_trace_syscall)
 142         PT_REGS_UNWIND_INFO(0)
 143         mov r3=-38
 144         adds r2=IA64_PT_REGS_R8_OFFSET+16,sp
 145         ;;
 146         st8 [r2]=r3                             // initialize return code to -ENOSYS
 147         br.call.sptk.few rp=syscall_trace_enter // give parent a chance to catch syscall args
 148 .ret2:  // Need to reload arguments (they may be changed by the tracing process)
 149         adds r2=IA64_PT_REGS_R1_OFFSET+16,sp    // r2 = &pt_regs.r1
 150         adds r3=IA64_PT_REGS_R13_OFFSET+16,sp   // r3 = &pt_regs.r13
 151         mov r15=IA32_NR_syscalls
 152         ;;
 153         ld4 r8=[r2],IA64_PT_REGS_R9_OFFSET-IA64_PT_REGS_R1_OFFSET
 154         movl r16=ia32_syscall_table
 155         ;;
 156         ld4 r33=[r2],8                          // r9 == ecx
 157         ld4 r37=[r3],16                         // r13 == ebp
 158         cmp.ltu.unc p6,p7=r8,r15
 159         ;;
 160         ld4 r34=[r2],8                          // r10 == edx
 161         ld4 r36=[r3],8                          // r15 == edi
 162 (p6)    shladd r16=r8,3,r16     // force ni_syscall if not valid syscall number
 163         ;;
 164         ld8 r16=[r16]
 165         ;;
 166         ld4 r32=[r2],8                          // r11 == ebx
 167         mov b6=r16
 168         ld4 r35=[r3],8                          // r14 == esi
 169         br.call.sptk.few rp=b6                  // do the syscall
 170 .ia32_strace_check_retval:
 171         cmp.lt p6,p0=r8,r0                      // syscall failed?
 172         adds r2=IA64_PT_REGS_R8_OFFSET+16,sp    // r2 = &pt_regs.r8
 173         ;;
 174         st8.spill [r2]=r8                       // store return value in slot for r8
 175         br.call.sptk.few rp=syscall_trace_leave // give parent a chance to catch return value
 176 .ret4:  alloc r2=ar.pfs,0,0,0,0                 // drop the syscall argument frame
 177         br.cond.sptk.many ia64_leave_kernel
 178 END(ia32_trace_syscall)
 179
 180 GLOBAL_ENTRY(sys32_vfork)
 181         alloc r16=ar.pfs,2,2,4,0;;
 182         mov out0=IA64_CLONE_VFORK|IA64_CLONE_VM|SIGCHLD // out0 = clone_flags
 183         br.cond.sptk.few .fork1                 // do the work
 184 END(sys32_vfork)
 185
 186 GLOBAL_ENTRY(sys32_fork)
 187         .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)
 188         alloc r16=ar.pfs,2,2,4,0
 189         mov out0=SIGCHLD                        // out0 = clone_flags
 190         ;;
 191 .fork1:
 192         mov loc0=rp
 193         mov loc1=r16                            // save ar.pfs across do_fork
 194         DO_SAVE_SWITCH_STACK
 195
 196         .body
 197
 198         mov out1=0
 199         mov out3=0
 200         adds out2=IA64_SWITCH_STACK_SIZE+16,sp  // out2 = &regs
 201         br.call.sptk.few rp=do_fork
 202 .ret5:  .restore sp
 203         adds sp=IA64_SWITCH_STACK_SIZE,sp       // pop the switch stack
 204         mov ar.pfs=loc1
 205         mov rp=loc0
 206         br.ret.sptk.many rp
 207 END(sys32_fork)
 208
 209         .rodata
 210         .align 8
 211         .globl ia32_syscall_table
 212 ia32_syscall_table:
 213         data8 sys_ni_syscall      /* 0  -  old "setup(" system call*/
 214         data8 sys_exit
 215         data8 sys32_fork
 216         data8 sys_read
 217         data8 sys_write
 218         data8 compat_sys_open     /* 5 */
 219         data8 sys_close
 220         data8 sys32_waitpid
 221         data8 sys_creat
 222         data8 sys_link
 223         data8 sys_unlink          /* 10 */
 224         data8 ia32_execve
 225         data8 sys_chdir
 226         data8 compat_sys_time
 227         data8 sys_mknod
 228         data8 sys_chmod           /* 15 */
 229         data8 sys_lchown        /* 16-bit version */
 230         data8 sys_ni_syscall      /* old break syscall holder */
 231         data8 sys_ni_syscall
 232         data8 sys32_lseek
 233         data8 sys_getpid          /* 20 */
 234         data8 compat_sys_mount
 235         data8 sys_oldumount
 236         data8 sys_setuid        /* 16-bit version */
 237         data8 sys_getuid        /* 16-bit version */
 238         data8 compat_sys_stime    /* 25 */
 239         data8 sys32_ptrace
 240         data8 sys32_alarm
 241         data8 sys_ni_syscall
 242         data8 sys32_pause
 243         data8 compat_sys_utime    /* 30 */
 244         data8 sys_ni_syscall      /* old stty syscall holder */
 245         data8 sys_ni_syscall      /* old gtty syscall holder */
 246         data8 sys_access
 247         data8 sys_nice
 248         data8 sys_ni_syscall      /* 35 */        /* old ftime syscall holder */
 249         data8 sys_sync
 250         data8 sys_kill
 251         data8 sys_rename
 252         data8 sys_mkdir
 253         data8 sys_rmdir           /* 40 */
 254         data8 sys_dup
 255         data8 sys32_pipe
 256         data8 compat_sys_times
 257         data8 sys_ni_syscall      /* old prof syscall holder */
 258         data8 sys32_brk           /* 45 */
 259         data8 sys_setgid        /* 16-bit version */
 260         data8 sys_getgid        /* 16-bit version */
 261         data8 sys32_signal
 262         data8 sys_geteuid       /* 16-bit version */
 263         data8 sys_getegid       /* 16-bit version */      /* 50 */
 264         data8 sys_acct
 265         data8 sys_umount          /* recycled never used phys( */
 266         data8 sys_ni_syscall      /* old lock syscall holder */
 267         data8 compat_sys_ioctl
 268         data8 compat_sys_fcntl    /* 55 */
 269         data8 sys_ni_syscall      /* old mpx syscall holder */
 270         data8 sys_setpgid
 271         data8 sys_ni_syscall      /* old ulimit syscall holder */
 272         data8 sys_ni_syscall
 273         data8 sys_umask           /* 60 */
 274         data8 sys_chroot
 275         data8 sys_ustat
 276         data8 sys_dup2
 277         data8 sys_getppid
 278         data8 sys_getpgrp         /* 65 */
 279         data8 sys_setsid
 280         data8 sys32_sigaction
 281         data8 sys_ni_syscall
 282         data8 sys_ni_syscall
 283         data8 sys_setreuid      /* 16-bit version */      /* 70 */
 284         data8 sys_setregid      /* 16-bit version */
 285         data8 sys32_sigsuspend
 286         data8 compat_sys_sigpending
 287         data8 sys_sethostname
 288         data8 compat_sys_setrlimit        /* 75 */
 289         data8 compat_sys_old_getrlimit
 290         data8 compat_sys_getrusage
 291         data8 sys32_gettimeofday
 292         data8 sys32_settimeofday
 293         data8 sys32_getgroups16   /* 80 */
 294         data8 sys32_setgroups16
 295         data8 sys32_old_select
 296         data8 sys_symlink
 297         data8 sys_ni_syscall
 298         data8 sys_readlink        /* 85 */
 299         data8 sys_uselib
 300         data8 sys_swapon
 301         data8 sys_reboot
 302         data8 sys32_readdir
 303         data8 sys32_mmap          /* 90 */
 304         data8 sys32_munmap
 305         data8 sys_truncate
 306         data8 sys_ftruncate
 307         data8 sys_fchmod
 308         data8 sys_fchown        /* 16-bit version */      /* 95 */
 309         data8 sys_getpriority
 310         data8 sys_setpriority
 311         data8 sys_ni_syscall      /* old profil syscall holder */
 312         data8 compat_sys_statfs
 313         data8 compat_sys_fstatfs          /* 100 */
 314         data8 sys_ni_syscall    /* ioperm */
 315         data8 compat_sys_socketcall
 316         data8 sys_syslog
 317         data8 compat_sys_setitimer
 318         data8 compat_sys_getitimer        /* 105 */
 319         data8 compat_sys_newstat
 320         data8 compat_sys_newlstat
 321         data8 compat_sys_newfstat
 322         data8 sys_ni_syscall
 323         data8 sys_ni_syscall    /* iopl */      /* 110 */
 324         data8 sys_vhangup
 325         data8 sys_ni_syscall            /* used to be sys_idle */
 326         data8 sys_ni_syscall
 327         data8 compat_sys_wait4
 328         data8 sys_swapoff         /* 115 */
 329         data8 compat_sys_sysinfo
 330         data8 sys32_ipc
 331         data8 sys_fsync
 332         data8 sys32_sigreturn
 333         data8 ia32_clone          /* 120 */
 334         data8 sys_setdomainname
 335         data8 sys32_newuname
 336         data8 sys32_modify_ldt
 337         data8 compat_sys_adjtimex
 338         data8 sys32_mprotect      /* 125 */
 339         data8 compat_sys_sigprocmask
 340         data8 sys_ni_syscall    /* create_module */
 341         data8 sys_ni_syscall    /* init_module */
 342         data8 sys_ni_syscall    /* delete_module */
 343         data8 sys_ni_syscall    /* get_kernel_syms */  /* 130 */
 344         data8 sys_quotactl
 345         data8 sys_getpgid
 346         data8 sys_fchdir
 347         data8 sys_ni_syscall    /* sys_bdflush */
 348         data8 sys_sysfs         /* 135 */
 349         data8 sys32_personality
 350         data8 sys_ni_syscall      /* for afs_syscall */
 351         data8 sys_setfsuid      /* 16-bit version */
 352         data8 sys_setfsgid      /* 16-bit version */
 353         data8 sys_llseek          /* 140 */
 354         data8 compat_sys_getdents
 355         data8 compat_sys_select
 356         data8 sys_flock
 357         data8 sys32_msync
 358         data8 compat_sys_readv    /* 145 */
 359         data8 compat_sys_writev
 360         data8 sys_getsid
 361         data8 sys_fdatasync
 362         data8 sys32_sysctl
 363         data8 sys_mlock           /* 150 */
 364         data8 sys_munlock
 365         data8 sys_mlockall
 366         data8 sys_munlockall
 367         data8 sys_sched_setparam
 368         data8 sys_sched_getparam  /* 155 */
 369         data8 sys_sched_setscheduler
 370         data8 sys_sched_getscheduler
 371         data8 sys_sched_yield
 372         data8 sys_sched_get_priority_max
 373         data8 sys_sched_get_priority_min         /* 160 */
 374         data8 sys32_sched_rr_get_interval
 375         data8 compat_sys_nanosleep
 376         data8 sys32_mremap
 377         data8 sys_setresuid     /* 16-bit version */
 378         data8 sys32_getresuid16 /* 16-bit version */      /* 165 */
 379         data8 sys_ni_syscall    /* vm86 */
 380         data8 sys_ni_syscall    /* sys_query_module */
 381         data8 sys_poll
 382         data8 sys_ni_syscall    /* nfsservctl */
 383         data8 sys_setresgid       /* 170 */
 384         data8 sys32_getresgid16
 385         data8 sys_prctl
 386         data8 sys32_rt_sigreturn
 387         data8 sys32_rt_sigaction
 388         data8 sys32_rt_sigprocmask /* 175 */
 389         data8 sys_rt_sigpending
 390         data8 compat_sys_rt_sigtimedwait
 391         data8 sys32_rt_sigqueueinfo
 392         data8 sys32_rt_sigsuspend
 393         data8 sys32_pread         /* 180 */
 394         data8 sys32_pwrite
 395         data8 sys_chown /* 16-bit version */
 396         data8 sys_getcwd
 397         data8 sys_capget
 398         data8 sys_capset          /* 185 */
 399         data8 sys32_sigaltstack
 400         data8 sys32_sendfile
 401         data8 sys_ni_syscall              /* streams1 */
 402         data8 sys_ni_syscall              /* streams2 */
 403         data8 sys32_vfork         /* 190 */
 404         data8 compat_sys_getrlimit
 405         data8 sys32_mmap2
 406         data8 sys32_truncate64
 407         data8 sys32_ftruncate64
 408         data8 sys32_stat64        /* 195 */
 409         data8 sys32_lstat64
 410         data8 sys32_fstat64
 411         data8 sys_lchown
 412         data8 sys_getuid
 413         data8 sys_getgid          /* 200 */
 414         data8 sys_geteuid
 415         data8 sys_getegid
 416         data8 sys_setreuid
 417         data8 sys_setregid
 418         data8 sys_getgroups       /* 205 */
 419         data8 sys_setgroups
 420         data8 sys_fchown
 421         data8 sys_setresuid
 422         data8 sys_getresuid
 423         data8 sys_setresgid       /* 210 */
 424         data8 sys_getresgid
 425         data8 sys_chown
 426         data8 sys_setuid
 427         data8 sys_setgid
 428         data8 sys_setfsuid        /* 215 */
 429         data8 sys_setfsgid
 430         data8 sys_pivot_root
 431         data8 sys_mincore
 432         data8 sys_madvise
 433         data8 compat_sys_getdents64       /* 220 */
 434         data8 compat_sys_fcntl64
 435         data8 sys_ni_syscall            /* reserved for TUX */
 436         data8 sys_ni_syscall            /* reserved for Security */
 437         data8 sys_gettid
 438         data8 sys_readahead       /* 225 */
 439         data8 sys_setxattr
 440         data8 sys_lsetxattr
 441         data8 sys_fsetxattr
 442         data8 sys_getxattr
 443         data8 sys_lgetxattr     /* 230 */
 444         data8 sys_fgetxattr
 445         data8 sys_listxattr
 446         data8 sys_llistxattr
 447         data8 sys_flistxattr
 448         data8 sys_removexattr   /* 235 */
 449         data8 sys_lremovexattr
 450         data8 sys_fremovexattr
 451         data8 sys_tkill
 452         data8 sys_sendfile64
 453         data8 compat_sys_futex  /* 240 */
 454         data8 compat_sys_sched_setaffinity
 455         data8 compat_sys_sched_getaffinity
 456         data8 sys32_set_thread_area
 457         data8 sys32_get_thread_area
 458         data8 compat_sys_io_setup       /* 245 */
 459         data8 sys_io_destroy
 460         data8 compat_sys_io_getevents
 461         data8 compat_sys_io_submit
 462         data8 sys_io_cancel
 463         data8 sys_fadvise64     /* 250 */
 464         data8 sys_ni_syscall
 465         data8 sys_exit_group
 466         data8 sys_lookup_dcookie
 467         data8 sys_epoll_create
 468         data8 sys32_epoll_ctl   /* 255 */
 469         data8 sys32_epoll_wait
 470         data8 sys_remap_file_pages
 471         data8 sys_set_tid_address
 472         data8 compat_sys_timer_create
 473         data8 compat_sys_timer_settime  /* 260 */
 474         data8 compat_sys_timer_gettime
 475         data8 sys_timer_getoverrun
 476         data8 sys_timer_delete
 477         data8 compat_sys_clock_settime
 478         data8 compat_sys_clock_gettime /* 265 */
 479         data8 compat_sys_clock_getres
 480         data8 compat_sys_clock_nanosleep
 481         data8 compat_sys_statfs64
 482         data8 compat_sys_fstatfs64
 483         data8 sys_tgkill        /* 270 */
 484         data8 compat_sys_utimes
 485         data8 sys32_fadvise64_64
 486         data8 sys_ni_syscall
 487         data8 sys_ni_syscall
 488         data8 sys_ni_syscall    /* 275 */
 489         data8 sys_ni_syscall
 490         data8 compat_sys_mq_open
 491         data8 sys_mq_unlink
 492         data8 compat_sys_mq_timedsend
 493         data8 compat_sys_mq_timedreceive        /* 280 */
 494         data8 compat_sys_mq_notify
 495         data8 compat_sys_mq_getsetattr
 496         data8 sys_ni_syscall            /* reserved for kexec */
 497         data8 compat_sys_waitid
 498
 499         // guard against failures to increase IA32_NR_syscalls
 500         .org ia32_syscall_table + 8*IA32_NR_syscalls