root/arch/alpha/kernel/entry.S

/* */

   1 /*
   2  * alpha/entry.S
   3  *
   4  * kernel entry-points
   5  */
   6 
   7 #include <asm/system.h>
   8 
   9 #define halt    .long PAL_halt
  10 #define rti     .long PAL_rti
  11 #define SIGCHLD 20
  12 
  13 #define NR_SYSCALLS 320
  14 #define osf_vfork sys_fork
  15 
  16 /*
  17  * These offsets must match with "struct hae" in io.h:  
  18  */
  19 #define HAE_CACHE       0
  20 #define HAE_REG         8
  21 
  22 /*
  23  * stack offsets
  24  */
  25 #define SP_OFF          160
  26 
  27 #define SWITCH_STACK_SIZE 320
  28 
  29 /*
  30  * task structure offsets
  31  */
  32 #define TASK_STATE      0
  33 #define TASK_COUNTER    8
  34 #define TASK_PRIORITY   16
  35 #define TASK_SIGNAL     24
  36 #define TASK_BLOCKED    32
  37 #define TASK_FLAGS      40
  38 
  39 /*
  40  * task flags (must match include/linux/sched.h):
  41  */
  42 #define PF_PTRACED      0x00000010
  43 
  44 /*
  45  * This defines the normal kernel pt-regs layout.
  46  *
  47  * regs 9-15 preserved by C code
  48  * regs 16-18 saved by PAL-code
  49  * regs 29-30 saved and set up by PAL-code
  50  */
  51 #define SAVE_ALL                        \
  52         subq    $30,160,$30;            \
  53         stq     $0,0($30);              \
  54         stq     $1,8($30);              \
  55         stq     $2,16($30);             \
  56         stq     $3,24($30);             \
  57         stq     $4,32($30);             \
  58         stq     $5,40($30);             \
  59         stq     $6,48($30);             \
  60         stq     $7,56($30);             \
  61         stq     $8,64($30);             \
  62         stq     $19,72($30);            \
  63         stq     $20,80($30);            \
  64         stq     $21,88($30);            \
  65         stq     $22,96($30);            \
  66         stq     $23,104($30);           \
  67         stq     $24,112($30);           \
  68         stq     $25,120($30);           \
  69         stq     $26,128($30);           \
  70         stq     $27,136($30);           \
  71         stq     $28,144($30);           \
  72         lda     $2,hae;                 \
  73         ldq     $2,HAE_CACHE($2);       \
  74         stq     $2,152($30)
  75 
  76 #define RESTORE_ALL                     \
  77         lda     $8,hae;                 \
  78         ldq     $7,HAE_CACHE($8);       \
  79         ldq     $6,152($30);            \
  80         subq    $7,$6,$5;               \
  81         beq     $5,99f;                 \
  82         ldq     $7,HAE_REG($8);         \
  83         addq    $31,7,$16;              \
  84         call_pal PAL_swpipl;            \
  85         stq     $6,HAE_CACHE($8);       \
  86         stq     $6,0($7);               \
  87         mb;                             \
  88         bis     $0,$0,$16;              \
  89         call_pal PAL_swpipl;            \
  90 99:;                                    \
  91         ldq     $0,0($30);              \
  92         ldq     $1,8($30);              \
  93         ldq     $2,16($30);             \
  94         ldq     $3,24($30);             \
  95         ldq     $4,32($30);             \
  96         ldq     $5,40($30);             \
  97         ldq     $6,48($30);             \
  98         ldq     $7,56($30);             \
  99         ldq     $8,64($30);             \
 100         ldq     $19,72($30);            \
 101         ldq     $20,80($30);            \
 102         ldq     $21,88($30);            \
 103         ldq     $22,96($30);            \
 104         ldq     $23,104($30);           \
 105         ldq     $24,112($30);           \
 106         ldq     $25,120($30);           \
 107         ldq     $26,128($30);           \
 108         ldq     $27,136($30);           \
 109         ldq     $28,144($30);           \
 110         addq    $30,160,$30
 111 
 112 .text
 113 .set noat
 114 #ifdef __linux__
 115   .set singlegp
 116 #endif
 117 
 118 .align 3
 119 .globl  entInt
 120 .ent    entInt
 121 entInt:
 122         SAVE_ALL
 123 /* start atomic operation with respect to software interrupts */
 124         lda     $0,intr_count
 125         ldq     $1,0($0)
 126         addq    $1,1,$1
 127         stq     $1,0($0)
 128 /* set up the arguments to the C interrupt handler */
 129         lda     $27,do_entInt
 130         jsr     $26,($27),do_entInt
 131 /* ok, check if we need to do software interrupts */
 132 1:      lda     $0,intr_count
 133         ldq     $1,0($0)
 134         subq    $1,1,$1
 135         bne     $1,2f           /* interrupt within interrupt: return now */
 136         lda     $2,bh_active
 137         ldq     $3,0($2)
 138         lda     $2,bh_mask
 139         ldq     $2,0($2)
 140         and     $2,$3,$2
 141         bne     $2,3f
 142         stq     $1,0($0)
 143         br      $31,ret_from_sys_call
 144 .align 3
 145 2:      stq     $1,0($0)
 146         br      $31,restore_all
 147 .align 3
 148 3:      lda     $27,do_bottom_half
 149         jsr     $26,($27),do_bottom_half
 150         br      $31,1b
 151 .end entInt
 152 
 153 .align 3
 154 .globl  entMM
 155 .ent    entMM
 156 entMM:
 157         SAVE_ALL
 158         lda     $27,do_page_fault
 159         lda     $26,ret_from_sys_call
 160         jsr     $31,($27),do_page_fault
 161 .end entMM
 162 
 163 .align 3
 164 .globl  entArith
 165 .ent    entArith
 166 entArith:
 167         SAVE_ALL
 168         lda     $27,do_entArith
 169         lda     $26,ret_from_sys_call
 170         jsr     $31,($27),do_entArith
 171 .end entArith
 172 
 173 .align 3
 174 .globl  entIF
 175 .ent    entIF
 176 entIF:
 177         SAVE_ALL
 178         lda     $27,do_entIF
 179         lda     $26,ret_from_sys_call
 180         jsr     $31,($27),do_entIF
 181 .end entIF
 182 
 183 /*
 184  * Fork() is one of the special system calls: it needs to
 185  * save the callee-saved regs so that the regs can be found
 186  * for the new process.. We save them in the "context switch"
 187  * stack format (see arch/alpha/kernel/process.c).
 188  *
 189  * Also, for the kernel fork, we need to fake the system call
 190  * stack buildup, as we can't do system calls from kernel space.
 191  */
 192 .align 3
 193 .globl  kernel_clone
 194 .ent    kernel_clone
 195 kernel_clone:
 196         subq $30,6*8,$30
 197         stq $31,0($30)
 198         stq $26,8($30)
 199         stq $29,16($30)
 200         stq $16,24($30)
 201         stq $17,32($30)
 202         stq $18,40($30)
 203         bis $31,2,$0    /* Register v0: syscall nr for fork() */
 204         SAVE_ALL
 205         lda $27,sys_clone
 206         jsr $26,($27),sys_clone
 207         stq $0,0($30)   
 208         br ret_from_sys_call
 209 .end    kernel_clone
 210 
 211 .align 3
 212 .ent    do_switch_stack
 213 do_switch_stack:
 214         lda $30,-SWITCH_STACK_SIZE($30)
 215         stq  $9,0($30)
 216         stq $10,8($30)
 217         stq $11,16($30)
 218         stq $12,24($30)
 219         stq $13,32($30)
 220         stq $14,40($30)
 221         stq $15,48($30)
 222         stq $26,56($30)
 223         stt $f0,64($30)
 224         stt $f1,72($30)
 225         stt $f2,80($30)
 226         stt $f3,88($30)
 227         stt $f4,96($30)
 228         stt $f5,104($30)
 229         stt $f6,112($30)
 230         stt $f7,120($30)
 231         stt $f8,128($30)
 232         stt $f9,136($30)
 233         stt $f10,144($30)
 234         stt $f11,152($30)
 235         stt $f12,160($30)
 236         stt $f13,168($30)
 237         stt $f14,176($30)
 238         stt $f15,184($30)
 239         stt $f16,192($30)
 240         stt $f17,200($30)
 241         stt $f18,208($30)
 242         stt $f19,216($30)
 243         stt $f20,224($30)
 244         stt $f21,232($30)
 245         stt $f22,240($30)
 246         stt $f23,248($30)
 247         stt $f24,256($30)
 248         stt $f25,264($30)
 249         stt $f26,272($30)
 250         stt $f27,280($30)
 251         stt $f28,288($30)
 252         stt $f29,296($30)
 253         stt $f30,304($30)
 254         ret $31,($1),1
 255 .end do_switch_stack
 256 
 257 .align 3
 258 .ent    undo_switch_stack
 259 undo_switch_stack:
 260         ldq  $9,0($30)
 261         ldq $10,8($30)
 262         ldq $11,16($30)
 263         ldq $12,24($30)
 264         ldq $13,32($30)
 265         ldq $14,40($30)
 266         ldq $15,48($30)
 267         ldq $26,56($30)
 268         ldt $f0,64($30)
 269         ldt $f1,72($30)
 270         ldt $f2,80($30)
 271         ldt $f3,88($30)
 272         ldt $f4,96($30)
 273         ldt $f5,104($30)
 274         ldt $f6,112($30)
 275         ldt $f7,120($30)
 276         ldt $f8,128($30)
 277         ldt $f9,136($30)
 278         ldt $f10,144($30)
 279         ldt $f11,152($30)
 280         ldt $f12,160($30)
 281         ldt $f13,168($30)
 282         ldt $f14,176($30)
 283         ldt $f15,184($30)
 284         ldt $f16,192($30)
 285         ldt $f17,200($30)
 286         ldt $f18,208($30)
 287         ldt $f19,216($30)
 288         ldt $f20,224($30)
 289         ldt $f21,232($30)
 290         ldt $f22,240($30)
 291         ldt $f23,248($30)
 292         ldt $f24,256($30)
 293         ldt $f25,264($30)
 294         ldt $f26,272($30)
 295         ldt $f27,280($30)
 296         ldt $f28,288($30)
 297         ldt $f29,296($30)
 298         ldt $f30,304($30)
 299         lda $30,SWITCH_STACK_SIZE($30)
 300         ret $31,($1),1
 301 .end undo_switch_stack
 302 
 303 .align 3
 304 .globl  entUna
 305 .ent    entUna
 306 entUna:
 307         lda $30,-256($30)
 308         stq $0,0($30)
 309         ldq $0,256($30)         /* get PS */
 310         stq $1,8($30)
 311         stq $2,16($30)
 312         stq $3,24($30)
 313         and $0,8,$0             /* user mode? */
 314         stq $4,32($30)
 315         bne $0,entUnaUser       /* yup -> do user-level unaligned fault */
 316         stq $5,40($30)
 317         stq $6,48($30)
 318         stq $7,56($30)
 319         stq $8,64($30)
 320         stq $9,72($30)
 321         stq $10,80($30)
 322         stq $11,88($30)
 323         stq $12,96($30)
 324         stq $13,104($30)
 325         stq $14,112($30)
 326         stq $15,120($30)
 327         /* 16-18 PAL-saved */
 328         stq $19,152($30)
 329         stq $20,160($30)
 330         stq $21,168($30)
 331         stq $22,176($30)
 332         stq $23,184($30)
 333         stq $24,192($30)
 334         stq $25,200($30)
 335         stq $26,208($30)
 336         stq $27,216($30)
 337         stq $28,224($30)
 338         stq $29,232($30)
 339         stq $30,240($30)
 340         stq $31,248($30)
 341         lda $27,do_entUna
 342         jsr $26,($27),do_entUna
 343         ldq $0,0($30)
 344         ldq $1,8($30)
 345         ldq $2,16($30)
 346         ldq $3,24($30)
 347         ldq $4,32($30)
 348         ldq $5,40($30)
 349         ldq $6,48($30)
 350         ldq $7,56($30)
 351         ldq $8,64($30)
 352         ldq $9,72($30)
 353         ldq $10,80($30)
 354         ldq $11,88($30)
 355         ldq $12,96($30)
 356         ldq $13,104($30)
 357         ldq $14,112($30)
 358         ldq $15,120($30)
 359         /* 16-18 PAL-saved */
 360         ldq $19,152($30)
 361         ldq $20,160($30)
 362         ldq $21,168($30)
 363         ldq $22,176($30)
 364         ldq $23,184($30)
 365         ldq $24,192($30)
 366         ldq $25,200($30)
 367         ldq $26,208($30)
 368         ldq $27,216($30)
 369         ldq $28,224($30)
 370         ldq $29,232($30)
 371         ldq $30,240($30)
 372         lda $30,256($30)
 373         rti
 374 .end entUna
 375 
 376 .align 3
 377 .ent    entUnaUser
 378 entUnaUser:
 379         ldq $0,0($30)                   /* restore original $0 */
 380         lda $30,256($30)                /* pop entUna's stack frame */
 381         SAVE_ALL                        /* setup normal kernel stack */
 382         lda $30,-56($30)
 383         stq $9,0($30)
 384         stq $10,8($30)
 385         stq $11,16($30)
 386         stq $12,24($30)
 387         stq $13,32($30)
 388         stq $14,40($30)
 389         stq $15,48($30)
 390         lda $27,do_entUnaUser
 391         bis $31,$30,$19
 392         jsr $26,($27),do_entUnaUser
 393         ldq $9,0($30)
 394         ldq $10,8($30)
 395         ldq $11,16($30)
 396         ldq $12,24($30)
 397         ldq $13,32($30)
 398         ldq $14,40($30)
 399         ldq $15,48($30)
 400         lda $30,56($30)
 401         br $31,ret_from_sys_call
 402 
 403 .end    entUnaUser
 404 
 405 /*
 406  * A fork is the same as clone(SIGCHLD, 0);
 407 */
 408 .align 3
 409 .globl  sys_fork
 410 .ent    sys_fork
 411 sys_fork:
 412         br $1,do_switch_stack
 413         bis $31,SIGCHLD,$16
 414         bis $31,$31,$17
 415         bis $30,$30,$18
 416         lda $27,alpha_clone
 417         jsr $26,($27),alpha_clone
 418         br $1,undo_switch_stack
 419         ret $31,($26),1
 420 .end    sys_fork
 421 
 422 .align 3
 423 .globl  sys_clone
 424 .ent    sys_clone
 425 sys_clone:
 426         br $1,do_switch_stack
 427         /* arg1 and arg2 come from the user */
 428         bis $30,$30,$18
 429         lda $27,alpha_clone
 430         jsr $26,($27),alpha_clone
 431         br $1,undo_switch_stack
 432         ret $31,($26),1
 433 .end    sys_clone
 434 
 435 .align 3
 436 .globl  alpha_switch_to
 437 .ent    alpha_switch_to
 438 alpha_switch_to:
 439         br $1,do_switch_stack
 440         call_pal PAL_swpctx
 441         br $1,undo_switch_stack
 442         ret $31,($26),1
 443 .end alpha_switch_to
 444 
 445 /*
 446  * Oh, well.. Disassembling OSF/1 binaries to find out how the
 447  * system calls work isn't much fun.
 448  *
 449  * entSys is special in that the PAL-code doesn't save a0-a2, so
 450  * we start off by doing that by hand.
 451  */
 452 .align 3
 453 .globl  entSys
 454 .globl  ret_from_sys_call
 455 .ent    entSys
 456 entSys:
 457         stq     $16,24($30)
 458         stq     $17,32($30)
 459         stq     $18,40($30)
 460         SAVE_ALL
 461         lda     $1,NR_SYSCALLS($31)
 462         lda     $2,sys_call_table
 463         lda     $27,do_entSys
 464         cmpult  $0,$1,$1
 465         s8addq  $0,$2,$2
 466         beq     $1,1f
 467         ldq     $27,0($2)
 468 1:      jsr     $26,($27),do_entSys
 469         blt     $0,syscall_error        /* the call failed */
 470         stq     $0,0($30)
 471 ret_success:
 472         stq     $31,72($30)             /* a3=0 => no error */
 473 .align 3
 474 ret_from_sys_call:
 475         ldq     $0,SP_OFF($30)
 476         cmovne  $26,0,$19               /* $19 = 0 => non-restartable */
 477         and     $0,8,$0
 478         beq     $0,restore_all
 479 ret_from_reschedule:
 480         lda     $0,need_resched
 481         lda     $1,current
 482         ldl     $2,0($0)
 483         lda     $4,init_task
 484         ldq     $3,0($1)
 485         bne     $2,reschedule
 486         subq    $4,$3,$4
 487         beq     $4,restore_all
 488         ldq     $4,TASK_SIGNAL($3)
 489         ldq     $16,TASK_BLOCKED($3)
 490         bic     $4,$16,$4
 491         bne     $4,signal_return
 492 restore_all:
 493         RESTORE_ALL
 494         rti
 495 
 496         .align 3
 497 syscall_error:
 498         /*
 499          * Some system calls (e.g., ptrace) can return arbitrary
 500          * values which might normally be mistaken as error numbers.
 501          * Those functions must setup $0 (v0) directly in the stack frame
 502          * and return with value -255.
 503          */
 504         addq    $0,255,$1
 505         beq     $1,ret_success
 506 
 507         bis     $31,$31,$26     /* tell "ret_from_sys_call" that we can restart */
 508         ldq     $19,0($30)      /* .. with this syscall nr */
 509         ldq     $20,72($30)     /* .. and this a3 */
 510         subq    $31,$0,$0       /* with error in v0 */
 511         addq    $31,1,$1        /* set a3 for errno return */
 512         stq     $0,0($30)
 513         stq     $1,72($30)      /* a3 for return */
 514         br      $31,ret_from_sys_call
 515 
 516 .align 3
 517 signal_return:
 518         bis     $30,$30,$17
 519         br      $1,do_switch_stack
 520         bis     $30,$30,$18
 521         lda     $27,do_signal
 522         jsr     $26,($27),do_signal
 523         lda     $30,SWITCH_STACK_SIZE($30)
 524         br      $31,restore_all
 525 .end entSys
 526 
 527 .align 3
 528 .ent reschedule
 529 reschedule:
 530         subq    $30,16,$30
 531         stq     $19,0($30)      /* save syscall nr */
 532         stq     $20,8($30)      /* and error indication (a3) */
 533         lda     $27,schedule
 534         jsr     $26,($27),schedule
 535         ldq     $19,0($30)
 536         ldq     $20,8($30)
 537         addq    $30,16,$30
 538         br      $31,ret_from_reschedule
 539 .end reschedule
 540 
 541 .align 3
 542 .ent sys_sigreturn
 543 sys_sigreturn:
 544         bis     $30,$30,$17
 545         lda     $30,-SWITCH_STACK_SIZE($30)
 546         bis     $30,$30,$18
 547         lda     $27,do_sigreturn
 548         jsr     $26,($27),do_sigreturn
 549         br      $1,undo_switch_stack
 550         br      $31,ret_from_sys_call
 551 .end sys_sigreturn
 552 
 553 .align 3
 554 .ent sys_sigsuspend
 555 sys_sigsuspend:
 556         bis     $30,$30,$17
 557         br      $1,do_switch_stack
 558         bis     $30,$30,$18
 559         lda     $27,do_sigsuspend
 560         jsr     $26,($27),do_sigsuspend
 561         lda     $30,SWITCH_STACK_SIZE($30)
 562         br      $31,ret_from_sys_call
 563 .end sys_sigsuspend
 564 
 565         .align 3
 566         .globl sys_call_table
 567 sys_call_table:
 568 /*0*/   .quad do_entSys, sys_exit, sys_fork, sys_read, sys_write
 569         .quad do_entSys, sys_close, sys_wait4, do_entSys, sys_link
 570         .quad sys_unlink, do_entSys, sys_chdir, sys_fchdir, sys_mknod
 571         .quad sys_chmod, sys_chown, sys_brk, do_entSys, sys_lseek
 572         .quad sys_getxpid, osf_mount, osf_umount, sys_setuid, sys_getxuid
 573         .quad do_entSys, sys_ptrace, do_entSys, do_entSys, do_entSys
 574         .quad do_entSys, do_entSys, do_entSys, sys_access, do_entSys
 575         .quad do_entSys, sys_sync, sys_kill, do_entSys, sys_setpgid
 576         .quad do_entSys, sys_dup, sys_pipe, do_entSys, do_entSys
 577         .quad sys_open, do_entSys, sys_getxgid, osf_sigprocmask, do_entSys
 578 /*50*/  .quad do_entSys, sys_acct, do_entSys, do_entSys, sys_ioctl
 579         .quad do_entSys, do_entSys, sys_symlink, sys_readlink, sys_execve
 580         .quad sys_umask, do_entSys, do_entSys, sys_getpgrp, sys_getpagesize
 581         .quad do_entSys, osf_vfork, sys_newstat, sys_newlstat, do_entSys
 582         .quad do_entSys, osf_mmap, do_entSys, sys_munmap, sys_mprotect
 583         .quad sys_madvise, sys_vhangup, do_entSys, do_entSys, sys_getgroups
 584         /* map BSD's setpgrp to sys_setpgid for binary compatibility: */
 585         .quad sys_setgroups, do_entSys, sys_setpgid, sys_setitimer, do_entSys
 586         .quad do_entSys, sys_getitimer, sys_gethostname, sys_sethostname, sys_getdtablesize
 587         .quad sys_dup2, sys_newfstat, sys_fcntl, sys_select, do_entSys
 588         .quad sys_fsync, sys_setpriority, sys_socket, sys_connect, sys_accept
 589 /*100*/ .quad sys_getpriority, sys_send, sys_recv, sys_sigreturn, sys_bind
 590         .quad sys_setsockopt, sys_listen, do_entSys, do_entSys, do_entSys
 591         .quad do_entSys, sys_sigsuspend, do_entSys, do_entSys, do_entSys
 592         .quad do_entSys, sys_gettimeofday, sys_getrusage, sys_getsockopt, do_entSys
 593         .quad do_entSys, do_entSys, sys_settimeofday, sys_fchown, sys_fchmod
 594         .quad sys_recvfrom, sys_setreuid, sys_setregid, sys_rename, sys_truncate
 595         .quad sys_ftruncate, do_entSys, sys_setgid, sys_sendto, sys_shutdown
 596         .quad sys_socketpair, sys_mkdir, sys_rmdir, sys_utimes, do_entSys
 597         .quad do_entSys, sys_getpeername, do_entSys, do_entSys, sys_getrlimit
 598         .quad sys_setrlimit, do_entSys, sys_setsid, do_entSys, do_entSys
 599 /*150*/ .quad sys_getsockname, do_entSys, do_entSys, do_entSys, do_entSys
 600         .quad do_entSys, sys_sigaction, do_entSys, do_entSys, osf_getdirentries
 601         .quad osf_statfs, osf_fstatfs, do_entSys, do_entSys, do_entSys
 602         .quad osf_getdomainname, do_entSys, do_entSys, do_entSys, do_entSys
 603         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 604         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 605         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 606         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 607         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 608         .quad do_entSys, do_entSys, do_entSys, do_entSys, osf_swapon
 609 /*200*/ .quad sys_msgctl, sys_msgget, sys_msgrcv, sys_msgsnd, sys_semctl
 610         .quad sys_semget, sys_semop, osf_utsname, do_entSys, osf_shmat
 611         .quad sys_shmctl, sys_shmdt, sys_shmget, do_entSys, do_entSys
 612         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 613         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 614         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 615         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 616         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 617         .quad do_entSys, do_entSys, do_entSys, do_entSys, osf_proplist_syscall
 618         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 619 /*250*/ .quad do_entSys, osf_usleep_thread, do_entSys, do_entSys, do_entSys
 620         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 621         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 622         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 623         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 624         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 625         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 626         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 627         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 628         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 629 /* linux-specific system calls start at 300 */
 630 /*300*/ .quad sys_bdflush, sys_sethae, sys_mount, sys_adjtimex, sys_swapoff
 631         .quad sys_getdents, sys_create_module, sys_init_module, sys_delete_module, sys_get_kernel_syms
 632         .quad sys_syslog, sys_reboot, sys_clone, do_entSys, do_entSys
 633         .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
 634 

/* */