arch/frv/kernel/entry.S

   1 /* entry.S: FR-V entry
   2  *
   3  * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  *
  12  * Entry to the kernel is "interesting":
  13  *  (1) There are no stack pointers, not even for the kernel
  14  *  (2) General Registers should not be clobbered
  15  *  (3) There are no kernel-only data registers
  16  *  (4) Since all addressing modes are wrt to a General Register, no global
  17  *      variables can be reached
  18  *
  19  * We deal with this by declaring that we shall kill GR28 on entering the
  20  * kernel from userspace
  21  *
  22  * However, since break interrupts can interrupt the CPU even when PSR.ET==0,
  23  * they can't rely on GR28 to be anything useful, and so need to clobber a
  24  * separate register (GR31). Break interrupts are managed in break.S
  25  *
  26  * GR29 _is_ saved, and holds the current task pointer globally
  27  *
  28  */
  29
  30 #include <linux/sys.h>
  31 #include <linux/config.h>
  32 #include <linux/linkage.h>
  33 #include <asm/thread_info.h>
  34 #include <asm/setup.h>
  35 #include <asm/segment.h>
  36 #include <asm/ptrace.h>
  37 #include <asm/errno.h>
  38 #include <asm/cache.h>
  39 #include <asm/spr-regs.h>
  40
  41 #define nr_syscalls ((syscall_table_size)/4)
  42
  43         .text
  44         .balign         4
  45
  46 .macro LEDS val
  47 #       sethi.p         %hi(0xe1200004),gr30
  48 #       setlo           %lo(0xe1200004),gr30
  49 #       setlos          #~\val,gr31
  50 #       st              gr31,@(gr30,gr0)
  51 #       sethi.p         %hi(0xffc00100),gr30
  52 #       setlo           %lo(0xffc00100),gr30
  53 #       sth             gr0,@(gr30,gr0)
  54 #       membar
  55 .endm
  56
  57 .macro LEDS32
  58 #       not             gr31,gr31
  59 #       sethi.p         %hi(0xe1200004),gr30
  60 #       setlo           %lo(0xe1200004),gr30
  61 #       st.p            gr31,@(gr30,gr0)
  62 #       srli            gr31,#16,gr31
  63 #       sethi.p         %hi(0xffc00100),gr30
  64 #       setlo           %lo(0xffc00100),gr30
  65 #       sth             gr31,@(gr30,gr0)
  66 #       membar
  67 .endm
  68
  69 ###############################################################################
  70 #
  71 # entry point for External interrupts received whilst executing userspace code
  72 #
  73 ###############################################################################
  74         .globl          __entry_uspace_external_interrupt
  75         .type           __entry_uspace_external_interrupt,@function
  76 __entry_uspace_external_interrupt:
  77         LEDS            0x6200
  78         sethi.p         %hi(__kernel_frame0_ptr),gr28
  79         setlo           %lo(__kernel_frame0_ptr),gr28
  80         ldi             @(gr28,#0),gr28
  81
  82         # handle h/w single-step through exceptions
  83         sti             gr0,@(gr28,#REG__STATUS)
  84
  85         .globl          __entry_uspace_external_interrupt_reentry
  86 __entry_uspace_external_interrupt_reentry:
  87         LEDS            0x6201
  88
  89         setlos          #REG__END,gr30
  90         dcpl            gr28,gr30,#0
  91
  92         # finish building the exception frame
  93         sti             sp,  @(gr28,#REG_SP)
  94         stdi            gr2, @(gr28,#REG_GR(2))
  95         stdi            gr4, @(gr28,#REG_GR(4))
  96         stdi            gr6, @(gr28,#REG_GR(6))
  97         stdi            gr8, @(gr28,#REG_GR(8))
  98         stdi            gr10,@(gr28,#REG_GR(10))
  99         stdi            gr12,@(gr28,#REG_GR(12))
 100         stdi            gr14,@(gr28,#REG_GR(14))
 101         stdi            gr16,@(gr28,#REG_GR(16))
 102         stdi            gr18,@(gr28,#REG_GR(18))
 103         stdi            gr20,@(gr28,#REG_GR(20))
 104         stdi            gr22,@(gr28,#REG_GR(22))
 105         stdi            gr24,@(gr28,#REG_GR(24))
 106         stdi            gr26,@(gr28,#REG_GR(26))
 107         sti             gr0, @(gr28,#REG_GR(28))
 108         sti             gr29,@(gr28,#REG_GR(29))
 109         stdi.p          gr30,@(gr28,#REG_GR(30))
 110
 111         # set up the kernel stack pointer
 112         ori             gr28,0,sp
 113
 114         movsg           tbr ,gr20
 115         movsg           psr ,gr22
 116         movsg           pcsr,gr21
 117         movsg           isr ,gr23
 118         movsg           ccr ,gr24
 119         movsg           cccr,gr25
 120         movsg           lr  ,gr26
 121         movsg           lcr ,gr27
 122
 123         setlos.p        #-1,gr4
 124         andi            gr22,#PSR_PS,gr5                /* try to rebuild original PSR value */
 125         andi.p          gr22,#~(PSR_PS|PSR_S),gr6
 126         slli            gr5,#1,gr5
 127         or              gr6,gr5,gr5
 128         andi            gr5,#~PSR_ET,gr5
 129
 130         sti             gr20,@(gr28,#REG_TBR)
 131         sti             gr21,@(gr28,#REG_PC)
 132         sti             gr5 ,@(gr28,#REG_PSR)
 133         sti             gr23,@(gr28,#REG_ISR)
 134         stdi            gr24,@(gr28,#REG_CCR)
 135         stdi            gr26,@(gr28,#REG_LR)
 136         sti             gr4 ,@(gr28,#REG_SYSCALLNO)
 137
 138         movsg           iacc0h,gr4
 139         movsg           iacc0l,gr5
 140         stdi            gr4,@(gr28,#REG_IACC0)
 141
 142         movsg           gner0,gr4
 143         movsg           gner1,gr5
 144         stdi.p          gr4,@(gr28,#REG_GNER0)
 145
 146         # interrupts start off fully disabled in the interrupt handler
 147         subcc           gr0,gr0,gr0,icc2                /* set Z and clear C */
 148
 149         # set up kernel global registers
 150         sethi.p         %hi(__kernel_current_task),gr5
 151         setlo           %lo(__kernel_current_task),gr5
 152         sethi.p         %hi(_gp),gr16
 153         setlo           %lo(_gp),gr16
 154         ldi             @(gr5,#0),gr29
 155         ldi.p           @(gr29,#4),gr15         ; __current_thread_info = current->thread_info
 156
 157         # make sure we (the kernel) get div-zero and misalignment exceptions
 158         setlos          #ISR_EDE|ISR_DTT_DIVBYZERO|ISR_EMAM_EXCEPTION,gr5
 159         movgs           gr5,isr
 160
 161         # switch to the kernel trap table
 162         sethi.p         %hi(__entry_kerneltrap_table),gr6
 163         setlo           %lo(__entry_kerneltrap_table),gr6
 164         movgs           gr6,tbr
 165
 166         # set the return address
 167         sethi.p         %hi(__entry_return_from_user_interrupt),gr4
 168         setlo           %lo(__entry_return_from_user_interrupt),gr4
 169         movgs           gr4,lr
 170
 171         # raise the minimum interrupt priority to 15 (NMI only) and enable exceptions
 172         movsg           psr,gr4
 173
 174         ori             gr4,#PSR_PIL_14,gr4
 175         movgs           gr4,psr
 176         ori             gr4,#PSR_PIL_14|PSR_ET,gr4
 177         movgs           gr4,psr
 178
 179         LEDS            0x6202
 180         bra             do_IRQ
 181
 182         .size           __entry_uspace_external_interrupt,.-__entry_uspace_external_interrupt
 183
 184 ###############################################################################
 185 #
 186 # entry point for External interrupts received whilst executing kernel code
 187 # - on arriving here, the following registers should already be set up:
 188 #       GR15    - current thread_info struct pointer
 189 #       GR16    - kernel GP-REL pointer
 190 #       GR29    - current task struct pointer
 191 #       TBR     - kernel trap vector table
 192 #       ISR     - kernel's preferred integer controls
 193 #
 194 ###############################################################################
 195         .globl          __entry_kernel_external_interrupt
 196         .type           __entry_kernel_external_interrupt,@function
 197 __entry_kernel_external_interrupt:
 198         LEDS            0x6210
 199 //      sub             sp,gr15,gr31
 200 //      LEDS32
 201
 202         # set up the stack pointer
 203         or.p            sp,gr0,gr30
 204         subi            sp,#REG__END,sp
 205         sti             gr30,@(sp,#REG_SP)
 206
 207         # handle h/w single-step through exceptions
 208         sti             gr0,@(sp,#REG__STATUS)
 209
 210         .globl          __entry_kernel_external_interrupt_reentry
 211 __entry_kernel_external_interrupt_reentry:
 212         LEDS            0x6211
 213
 214         # set up the exception frame
 215         setlos          #REG__END,gr30
 216         dcpl            sp,gr30,#0
 217
 218         sti.p           gr28,@(sp,#REG_GR(28))
 219         ori             sp,0,gr28
 220
 221         # finish building the exception frame
 222         stdi            gr2,@(gr28,#REG_GR(2))
 223         stdi            gr4,@(gr28,#REG_GR(4))
 224         stdi            gr6,@(gr28,#REG_GR(6))
 225         stdi            gr8,@(gr28,#REG_GR(8))
 226         stdi            gr10,@(gr28,#REG_GR(10))
 227         stdi            gr12,@(gr28,#REG_GR(12))
 228         stdi            gr14,@(gr28,#REG_GR(14))
 229         stdi            gr16,@(gr28,#REG_GR(16))
 230         stdi            gr18,@(gr28,#REG_GR(18))
 231         stdi            gr20,@(gr28,#REG_GR(20))
 232         stdi            gr22,@(gr28,#REG_GR(22))
 233         stdi            gr24,@(gr28,#REG_GR(24))
 234         stdi            gr26,@(gr28,#REG_GR(26))
 235         sti             gr29,@(gr28,#REG_GR(29))
 236         stdi.p          gr30,@(gr28,#REG_GR(30))
 237
 238         # note virtual interrupts will be fully enabled upon return
 239         subicc          gr0,#1,gr0,icc2                 /* clear Z, set C */
 240
 241         movsg           tbr ,gr20
 242         movsg           psr ,gr22
 243         movsg           pcsr,gr21
 244         movsg           isr ,gr23
 245         movsg           ccr ,gr24
 246         movsg           cccr,gr25
 247         movsg           lr  ,gr26
 248         movsg           lcr ,gr27
 249
 250         setlos.p        #-1,gr4
 251         andi            gr22,#PSR_PS,gr5                /* try to rebuild original PSR value */
 252         andi.p          gr22,#~(PSR_PS|PSR_S),gr6
 253         slli            gr5,#1,gr5
 254         or              gr6,gr5,gr5
 255         andi.p          gr5,#~PSR_ET,gr5
 256
 257         # set CCCR.CC3 to Undefined to abort atomic-modify completion inside the kernel
 258         # - for an explanation of how it works, see: Documentation/fujitsu/frv/atomic-ops.txt
 259         andi            gr25,#~0xc0,gr25
 260
 261         sti             gr20,@(gr28,#REG_TBR)
 262         sti             gr21,@(gr28,#REG_PC)
 263         sti             gr5 ,@(gr28,#REG_PSR)
 264         sti             gr23,@(gr28,#REG_ISR)
 265         stdi            gr24,@(gr28,#REG_CCR)
 266         stdi            gr26,@(gr28,#REG_LR)
 267         sti             gr4 ,@(gr28,#REG_SYSCALLNO)
 268
 269         movsg           iacc0h,gr4
 270         movsg           iacc0l,gr5
 271         stdi            gr4,@(gr28,#REG_IACC0)
 272
 273         movsg           gner0,gr4
 274         movsg           gner1,gr5
 275         stdi.p          gr4,@(gr28,#REG_GNER0)
 276
 277         # interrupts start off fully disabled in the interrupt handler
 278         subcc           gr0,gr0,gr0,icc2                        /* set Z and clear C */
 279
 280         # set the return address
 281         sethi.p         %hi(__entry_return_from_kernel_interrupt),gr4
 282         setlo           %lo(__entry_return_from_kernel_interrupt),gr4
 283         movgs           gr4,lr
 284
 285         # clear power-saving mode flags
 286         movsg           hsr0,gr4
 287         andi            gr4,#~HSR0_PDM,gr4
 288         movgs           gr4,hsr0
 289
 290         # raise the minimum interrupt priority to 15 (NMI only) and enable exceptions
 291         movsg           psr,gr4
 292         ori             gr4,#PSR_PIL_14,gr4
 293         movgs           gr4,psr
 294         ori             gr4,#PSR_ET,gr4
 295         movgs           gr4,psr
 296
 297         LEDS            0x6212
 298         bra             do_IRQ
 299
 300         .size           __entry_kernel_external_interrupt,.-__entry_kernel_external_interrupt
 301
 302 ###############################################################################
 303 #
 304 # deal with interrupts that were actually virtually disabled
 305 # - we need to really disable them, flag the fact and return immediately
 306 # - if you change this, you must alter break.S also
 307 #
 308 ###############################################################################
 309         .balign         L1_CACHE_BYTES
 310         .globl          __entry_kernel_external_interrupt_virtually_disabled
 311         .type           __entry_kernel_external_interrupt_virtually_disabled,@function
 312 __entry_kernel_external_interrupt_virtually_disabled:
 313         movsg           psr,gr30
 314         andi            gr30,#~PSR_PIL,gr30
 315         ori             gr30,#PSR_PIL_14,gr30           ; debugging interrupts only
 316         movgs           gr30,psr
 317         subcc           gr0,gr0,gr0,icc2                ; leave Z set, clear C
 318         rett            #0
 319
 320         .size           __entry_kernel_external_interrupt_virtually_disabled,.-__entry_kernel_external_interrupt_virtually_disabled
 321
 322 ###############################################################################
 323 #
 324 # deal with re-enablement of interrupts that were pending when virtually re-enabled
 325 # - set ICC2.C, re-enable the real interrupts and return
 326 # - we can clear ICC2.Z because we shouldn't be here if it's not 0 [due to TIHI]
 327 # - if you change this, you must alter break.S also
 328 #
 329 ###############################################################################
 330         .balign         L1_CACHE_BYTES
 331         .globl          __entry_kernel_external_interrupt_virtual_reenable
 332         .type           __entry_kernel_external_interrupt_virtual_reenable,@function
 333 __entry_kernel_external_interrupt_virtual_reenable:
 334         movsg           psr,gr30
 335         andi            gr30,#~PSR_PIL,gr30             ; re-enable interrupts
 336         movgs           gr30,psr
 337         subicc          gr0,#1,gr0,icc2                 ; clear Z, set C
 338         rett            #0
 339
 340         .size           __entry_kernel_external_interrupt_virtual_reenable,.-__entry_kernel_external_interrupt_virtual_reenable
 341
 342 ###############################################################################
 343 #
 344 # entry point for Software and Progam interrupts generated whilst executing userspace code
 345 #
 346 ###############################################################################
 347         .globl          __entry_uspace_softprog_interrupt
 348         .type           __entry_uspace_softprog_interrupt,@function
 349         .globl          __entry_uspace_handle_mmu_fault
 350 __entry_uspace_softprog_interrupt:
 351         LEDS            0x6000
 352 #ifdef CONFIG_MMU
 353         movsg           ear0,gr28
 354 __entry_uspace_handle_mmu_fault:
 355         movgs           gr28,scr2
 356 #endif
 357         sethi.p         %hi(__kernel_frame0_ptr),gr28
 358         setlo           %lo(__kernel_frame0_ptr),gr28
 359         ldi             @(gr28,#0),gr28
 360
 361         # handle h/w single-step through exceptions
 362         sti             gr0,@(gr28,#REG__STATUS)
 363
 364         .globl          __entry_uspace_softprog_interrupt_reentry
 365 __entry_uspace_softprog_interrupt_reentry:
 366         LEDS            0x6001
 367
 368         setlos          #REG__END,gr30
 369         dcpl            gr28,gr30,#0
 370
 371         # set up the kernel stack pointer
 372         sti.p           sp,@(gr28,#REG_SP)
 373         ori             gr28,0,sp
 374         sti             gr0,@(gr28,#REG_GR(28))
 375
 376         stdi            gr20,@(gr28,#REG_GR(20))
 377         stdi            gr22,@(gr28,#REG_GR(22))
 378
 379         movsg           tbr,gr20
 380         movsg           pcsr,gr21
 381         movsg           psr,gr22
 382
 383         sethi.p         %hi(__entry_return_from_user_exception),gr23
 384         setlo           %lo(__entry_return_from_user_exception),gr23
 385
 386         bra             __entry_common
 387
 388         .size           __entry_uspace_softprog_interrupt,.-__entry_uspace_softprog_interrupt
 389
 390         # single-stepping was disabled on entry to a TLB handler that then faulted
 391 #ifdef CONFIG_MMU
 392         .globl          __entry_uspace_handle_mmu_fault_sstep
 393 __entry_uspace_handle_mmu_fault_sstep:
 394         movgs           gr28,scr2
 395         sethi.p         %hi(__kernel_frame0_ptr),gr28
 396         setlo           %lo(__kernel_frame0_ptr),gr28
 397         ldi             @(gr28,#0),gr28
 398
 399         # flag single-step re-enablement
 400         sti             gr0,@(gr28,#REG__STATUS)
 401         bra             __entry_uspace_softprog_interrupt_reentry
 402 #endif
 403
 404
 405 ###############################################################################
 406 #
 407 # entry point for Software and Progam interrupts generated whilst executing kernel code
 408 #
 409 ###############################################################################
 410         .globl          __entry_kernel_softprog_interrupt
 411         .type           __entry_kernel_softprog_interrupt,@function
 412 __entry_kernel_softprog_interrupt:
 413         LEDS            0x6004
 414
 415 #ifdef CONFIG_MMU
 416         movsg           ear0,gr30
 417         movgs           gr30,scr2
 418 #endif
 419
 420         .globl          __entry_kernel_handle_mmu_fault
 421 __entry_kernel_handle_mmu_fault:
 422         # set up the stack pointer
 423         subi            sp,#REG__END,sp
 424         sti             sp,@(sp,#REG_SP)
 425         sti             sp,@(sp,#REG_SP-4)
 426         andi            sp,#~7,sp
 427
 428         # handle h/w single-step through exceptions
 429         sti             gr0,@(sp,#REG__STATUS)
 430
 431         .globl          __entry_kernel_softprog_interrupt_reentry
 432 __entry_kernel_softprog_interrupt_reentry:
 433         LEDS            0x6005
 434
 435         setlos          #REG__END,gr30
 436         dcpl            sp,gr30,#0
 437
 438         # set up the exception frame
 439         sti.p           gr28,@(sp,#REG_GR(28))
 440         ori             sp,0,gr28
 441
 442         stdi            gr20,@(gr28,#REG_GR(20))
 443         stdi            gr22,@(gr28,#REG_GR(22))
 444
 445         ldi             @(sp,#REG_SP),gr22              /* reconstruct the old SP */
 446         addi            gr22,#REG__END,gr22
 447         sti             gr22,@(sp,#REG_SP)
 448
 449         # set CCCR.CC3 to Undefined to abort atomic-modify completion inside the kernel
 450         # - for an explanation of how it works, see: Documentation/fujitsu/frv/atomic-ops.txt
 451         movsg           cccr,gr20
 452         andi            gr20,#~0xc0,gr20
 453         movgs           gr20,cccr
 454
 455         movsg           tbr,gr20
 456         movsg           pcsr,gr21
 457         movsg           psr,gr22
 458
 459         sethi.p         %hi(__entry_return_from_kernel_exception),gr23
 460         setlo           %lo(__entry_return_from_kernel_exception),gr23
 461         bra             __entry_common
 462
 463         .size           __entry_kernel_softprog_interrupt,.-__entry_kernel_softprog_interrupt
 464
 465         # single-stepping was disabled on entry to a TLB handler that then faulted
 466 #ifdef CONFIG_MMU
 467         .globl          __entry_kernel_handle_mmu_fault_sstep
 468 __entry_kernel_handle_mmu_fault_sstep:
 469         # set up the stack pointer
 470         subi            sp,#REG__END,sp
 471         sti             sp,@(sp,#REG_SP)
 472         sti             sp,@(sp,#REG_SP-4)
 473         andi            sp,#~7,sp
 474
 475         # flag single-step re-enablement
 476         sethi           #REG__STATUS_STEP,gr30
 477         sti             gr30,@(sp,#REG__STATUS)
 478         bra             __entry_kernel_softprog_interrupt_reentry
 479 #endif
 480
 481
 482 ###############################################################################
 483 #
 484 # the rest of the kernel entry point code
 485 # - on arriving here, the following registers should be set up:
 486 #       GR1     - kernel stack pointer
 487 #       GR7     - syscall number (trap 0 only)
 488 #       GR8-13  - syscall args (trap 0 only)
 489 #       GR20    - saved TBR
 490 #       GR21    - saved PC
 491 #       GR22    - saved PSR
 492 #       GR23    - return handler address
 493 #       GR28    - exception frame on stack
 494 #       SCR2    - saved EAR0 where applicable (clobbered by ICI & ICEF insns on FR451)
 495 #       PSR     - PSR.S 1, PSR.ET 0
 496 #
 497 ###############################################################################
 498         .globl          __entry_common
 499         .type           __entry_common,@function
 500 __entry_common:
 501         LEDS            0x6008
 502
 503         # finish building the exception frame
 504         stdi            gr2,@(gr28,#REG_GR(2))
 505         stdi            gr4,@(gr28,#REG_GR(4))
 506         stdi            gr6,@(gr28,#REG_GR(6))
 507         stdi            gr8,@(gr28,#REG_GR(8))
 508         stdi            gr10,@(gr28,#REG_GR(10))
 509         stdi            gr12,@(gr28,#REG_GR(12))
 510         stdi            gr14,@(gr28,#REG_GR(14))
 511         stdi            gr16,@(gr28,#REG_GR(16))
 512         stdi            gr18,@(gr28,#REG_GR(18))
 513         stdi            gr24,@(gr28,#REG_GR(24))
 514         stdi            gr26,@(gr28,#REG_GR(26))
 515         sti             gr29,@(gr28,#REG_GR(29))
 516         stdi            gr30,@(gr28,#REG_GR(30))
 517
 518         movsg           lcr ,gr27
 519         movsg           lr  ,gr26
 520         movgs           gr23,lr
 521         movsg           cccr,gr25
 522         movsg           ccr ,gr24
 523         movsg           isr ,gr23
 524
 525         setlos.p        #-1,gr4
 526         andi            gr22,#PSR_PS,gr5                /* try to rebuild original PSR value */
 527         andi.p          gr22,#~(PSR_PS|PSR_S),gr6
 528         slli            gr5,#1,gr5
 529         or              gr6,gr5,gr5
 530         andi            gr5,#~PSR_ET,gr5
 531
 532         sti             gr20,@(gr28,#REG_TBR)
 533         sti             gr21,@(gr28,#REG_PC)
 534         sti             gr5 ,@(gr28,#REG_PSR)
 535         sti             gr23,@(gr28,#REG_ISR)
 536         stdi            gr24,@(gr28,#REG_CCR)
 537         stdi            gr26,@(gr28,#REG_LR)
 538         sti             gr4 ,@(gr28,#REG_SYSCALLNO)
 539
 540         movsg           iacc0h,gr4
 541         movsg           iacc0l,gr5
 542         stdi            gr4,@(gr28,#REG_IACC0)
 543
 544         movsg           gner0,gr4
 545         movsg           gner1,gr5
 546         stdi.p          gr4,@(gr28,#REG_GNER0)
 547
 548         # set up virtual interrupt disablement
 549         subicc          gr0,#1,gr0,icc2                 /* clear Z flag, set C flag */
 550
 551         # set up kernel global registers
 552         sethi.p         %hi(__kernel_current_task),gr5
 553         setlo           %lo(__kernel_current_task),gr5
 554         sethi.p         %hi(_gp),gr16
 555         setlo           %lo(_gp),gr16
 556         ldi             @(gr5,#0),gr29
 557         ldi             @(gr29,#4),gr15         ; __current_thread_info = current->thread_info
 558
 559         # switch to the kernel trap table
 560         sethi.p         %hi(__entry_kerneltrap_table),gr6
 561         setlo           %lo(__entry_kerneltrap_table),gr6
 562         movgs           gr6,tbr
 563
 564         # make sure we (the kernel) get div-zero and misalignment exceptions
 565         setlos          #ISR_EDE|ISR_DTT_DIVBYZERO|ISR_EMAM_EXCEPTION,gr5
 566         movgs           gr5,isr
 567
 568         # clear power-saving mode flags
 569         movsg           hsr0,gr4
 570         andi            gr4,#~HSR0_PDM,gr4
 571         movgs           gr4,hsr0
 572
 573         # multiplex again using old TBR as a guide
 574         setlos.p        #TBR_TT,gr3
 575         sethi           %hi(__entry_vector_table),gr6
 576         and.p           gr20,gr3,gr5
 577         setlo           %lo(__entry_vector_table),gr6
 578         srli            gr5,#2,gr5
 579         ld              @(gr5,gr6),gr5
 580
 581         LEDS            0x6009
 582         jmpl            @(gr5,gr0)
 583
 584
 585         .size           __entry_common,.-__entry_common
 586
 587 ###############################################################################
 588 #
 589 # handle instruction MMU fault
 590 #
 591 ###############################################################################
 592 #ifdef CONFIG_MMU
 593         .globl          __entry_insn_mmu_fault
 594 __entry_insn_mmu_fault:
 595         LEDS            0x6010
 596         setlos          #0,gr8
 597         movsg           esr0,gr9
 598         movsg           scr2,gr10
 599
 600         # now that we've accessed the exception regs, we can enable exceptions
 601         movsg           psr,gr4
 602         ori             gr4,#PSR_ET,gr4
 603         movgs           gr4,psr
 604
 605         sethi.p         %hi(do_page_fault),gr5
 606         setlo           %lo(do_page_fault),gr5
 607         jmpl            @(gr5,gr0)      ; call do_page_fault(0,esr0,ear0)
 608 #endif
 609
 610
 611 ###############################################################################
 612 #
 613 # handle instruction access error
 614 #
 615 ###############################################################################
 616         .globl          __entry_insn_access_error
 617 __entry_insn_access_error:
 618         LEDS            0x6011
 619         sethi.p         %hi(insn_access_error),gr5
 620         setlo           %lo(insn_access_error),gr5
 621         movsg           esfr1,gr8
 622         movsg           epcr0,gr9
 623         movsg           esr0,gr10
 624
 625         # now that we've accessed the exception regs, we can enable exceptions
 626         movsg           psr,gr4
 627         ori             gr4,#PSR_ET,gr4
 628         movgs           gr4,psr
 629         jmpl            @(gr5,gr0)      ; call insn_access_error(esfr1,epcr0,esr0)
 630
 631 ###############################################################################
 632 #
 633 # handle various instructions of dubious legality
 634 #
 635 ###############################################################################
 636         .globl          __entry_unsupported_trap
 637         .globl          __entry_illegal_instruction
 638         .globl          __entry_privileged_instruction
 639         .globl          __entry_debug_exception
 640 __entry_unsupported_trap:
 641         subi            gr21,#4,gr21
 642         sti             gr21,@(gr28,#REG_PC)
 643 __entry_illegal_instruction:
 644 __entry_privileged_instruction:
 645 __entry_debug_exception:
 646         LEDS            0x6012
 647         sethi.p         %hi(illegal_instruction),gr5
 648         setlo           %lo(illegal_instruction),gr5
 649         movsg           esfr1,gr8
 650         movsg           epcr0,gr9
 651         movsg           esr0,gr10
 652
 653         # now that we've accessed the exception regs, we can enable exceptions
 654         movsg           psr,gr4
 655         ori             gr4,#PSR_ET,gr4
 656         movgs           gr4,psr
 657         jmpl            @(gr5,gr0)      ; call ill_insn(esfr1,epcr0,esr0)
 658
 659 ###############################################################################
 660 #
 661 # handle media exception
 662 #
 663 ###############################################################################
 664         .globl          __entry_media_exception
 665 __entry_media_exception:
 666         LEDS            0x6013
 667         sethi.p         %hi(media_exception),gr5
 668         setlo           %lo(media_exception),gr5
 669         movsg           msr0,gr8
 670         movsg           msr1,gr9
 671
 672         # now that we've accessed the exception regs, we can enable exceptions
 673         movsg           psr,gr4
 674         ori             gr4,#PSR_ET,gr4
 675         movgs           gr4,psr
 676         jmpl            @(gr5,gr0)      ; call media_excep(msr0,msr1)
 677
 678 ###############################################################################
 679 #
 680 # handle data MMU fault
 681 # handle data DAT fault (write-protect exception)
 682 #
 683 ###############################################################################
 684 #ifdef CONFIG_MMU
 685         .globl          __entry_data_mmu_fault
 686 __entry_data_mmu_fault:
 687         .globl          __entry_data_dat_fault
 688 __entry_data_dat_fault:
 689         LEDS            0x6014
 690         setlos          #1,gr8
 691         movsg           esr0,gr9
 692         movsg           scr2,gr10       ; saved EAR0
 693
 694         # now that we've accessed the exception regs, we can enable exceptions
 695         movsg           psr,gr4
 696         ori             gr4,#PSR_ET,gr4
 697         movgs           gr4,psr
 698
 699         sethi.p         %hi(do_page_fault),gr5
 700         setlo           %lo(do_page_fault),gr5
 701         jmpl            @(gr5,gr0)      ; call do_page_fault(1,esr0,ear0)
 702 #endif
 703
 704 ###############################################################################
 705 #
 706 # handle data and instruction access exceptions
 707 #
 708 ###############################################################################
 709         .globl          __entry_insn_access_exception
 710         .globl          __entry_data_access_exception
 711 __entry_insn_access_exception:
 712 __entry_data_access_exception:
 713         LEDS            0x6016
 714         sethi.p         %hi(memory_access_exception),gr5
 715         setlo           %lo(memory_access_exception),gr5
 716         movsg           esr0,gr8
 717         movsg           scr2,gr9        ; saved EAR0
 718         movsg           epcr0,gr10
 719
 720         # now that we've accessed the exception regs, we can enable exceptions
 721         movsg           psr,gr4
 722         ori             gr4,#PSR_ET,gr4
 723         movgs           gr4,psr
 724         jmpl            @(gr5,gr0)      ; call memory_access_error(esr0,ear0,epcr0)
 725
 726 ###############################################################################
 727 #
 728 # handle data access error
 729 #
 730 ###############################################################################
 731         .globl          __entry_data_access_error
 732 __entry_data_access_error:
 733         LEDS            0x6016
 734         sethi.p         %hi(data_access_error),gr5
 735         setlo           %lo(data_access_error),gr5
 736         movsg           esfr1,gr8
 737         movsg           esr15,gr9
 738         movsg           ear15,gr10
 739
 740         # now that we've accessed the exception regs, we can enable exceptions
 741         movsg           psr,gr4
 742         ori             gr4,#PSR_ET,gr4
 743         movgs           gr4,psr
 744         jmpl            @(gr5,gr0)      ; call data_access_error(esfr1,esr15,ear15)
 745
 746 ###############################################################################
 747 #
 748 # handle data store error
 749 #
 750 ###############################################################################
 751         .globl          __entry_data_store_error
 752 __entry_data_store_error:
 753         LEDS            0x6017
 754         sethi.p         %hi(data_store_error),gr5
 755         setlo           %lo(data_store_error),gr5
 756         movsg           esfr1,gr8
 757         movsg           esr14,gr9
 758
 759         # now that we've accessed the exception regs, we can enable exceptions
 760         movsg           psr,gr4
 761         ori             gr4,#PSR_ET,gr4
 762         movgs           gr4,psr
 763         jmpl            @(gr5,gr0)      ; call data_store_error(esfr1,esr14)
 764
 765 ###############################################################################
 766 #
 767 # handle division exception
 768 #
 769 ###############################################################################
 770         .globl          __entry_division_exception
 771 __entry_division_exception:
 772         LEDS            0x6018
 773         sethi.p         %hi(division_exception),gr5
 774         setlo           %lo(division_exception),gr5
 775         movsg           esfr1,gr8
 776         movsg           esr0,gr9
 777         movsg           isr,gr10
 778
 779         # now that we've accessed the exception regs, we can enable exceptions
 780         movsg           psr,gr4
 781         ori             gr4,#PSR_ET,gr4
 782         movgs           gr4,psr
 783         jmpl            @(gr5,gr0)      ; call div_excep(esfr1,esr0,isr)
 784
 785 ###############################################################################
 786 #
 787 # handle compound exception
 788 #
 789 ###############################################################################
 790         .globl          __entry_compound_exception
 791 __entry_compound_exception:
 792         LEDS            0x6019
 793         sethi.p         %hi(compound_exception),gr5
 794         setlo           %lo(compound_exception),gr5
 795         movsg           esfr1,gr8
 796         movsg           esr0,gr9
 797         movsg           esr14,gr10
 798         movsg           esr15,gr11
 799         movsg           msr0,gr12
 800         movsg           msr1,gr13
 801
 802         # now that we've accessed the exception regs, we can enable exceptions
 803         movsg           psr,gr4
 804         ori             gr4,#PSR_ET,gr4
 805         movgs           gr4,psr
 806         jmpl            @(gr5,gr0)      ; call comp_excep(esfr1,esr0,esr14,esr15,msr0,msr1)
 807
 808 ###############################################################################
 809 #
 810 # handle interrupts and NMIs
 811 #
 812 ###############################################################################
 813         .globl          __entry_do_IRQ
 814 __entry_do_IRQ:
 815         LEDS            0x6020
 816
 817         # we can enable exceptions
 818         movsg           psr,gr4
 819         ori             gr4,#PSR_ET,gr4
 820         movgs           gr4,psr
 821         bra             do_IRQ
 822
 823         .globl          __entry_do_NMI
 824 __entry_do_NMI:
 825         LEDS            0x6021
 826
 827         # we can enable exceptions
 828         movsg           psr,gr4
 829         ori             gr4,#PSR_ET,gr4
 830         movgs           gr4,psr
 831         bra             do_NMI
 832
 833 ###############################################################################
 834 #
 835 # the return path for a newly forked child process
 836 # - __switch_to() saved the old current pointer in GR8 for us
 837 #
 838 ###############################################################################
 839         .globl          ret_from_fork
 840 ret_from_fork:
 841         LEDS            0x6100
 842         call            schedule_tail
 843
 844         # fork & co. return 0 to child
 845         setlos.p        #0,gr8
 846         bra             __syscall_exit
 847
 848 ###################################################################################################
 849 #
 850 # Return to user mode is not as complex as all this looks,
 851 # but we want the default path for a system call return to
 852 # go as quickly as possible which is why some of this is
 853 # less clear than it otherwise should be.
 854 #
 855 ###################################################################################################
 856         .balign         L1_CACHE_BYTES
 857         .globl          system_call
 858 system_call:
 859         LEDS            0x6101
 860         movsg           psr,gr4                 ; enable exceptions
 861         ori             gr4,#PSR_ET,gr4
 862         movgs           gr4,psr
 863
 864         sti             gr7,@(gr28,#REG_SYSCALLNO)
 865         sti.p           gr8,@(gr28,#REG_ORIG_GR8)
 866
 867         subicc          gr7,#nr_syscalls,gr0,icc0
 868         bnc             icc0,#0,__syscall_badsys
 869
 870         ldi             @(gr15,#TI_FLAGS),gr4
 871         ori             gr4,#_TIF_SYSCALL_TRACE,gr4
 872         andicc          gr4,#_TIF_SYSCALL_TRACE,gr0,icc0
 873         bne             icc0,#0,__syscall_trace_entry
 874
 875 __syscall_call:
 876         slli.p          gr7,#2,gr7
 877         sethi           %hi(sys_call_table),gr5
 878         setlo           %lo(sys_call_table),gr5
 879         ld              @(gr5,gr7),gr4
 880         calll           @(gr4,gr0)
 881
 882
 883 ###############################################################################
 884 #
 885 # return to interrupted process
 886 #
 887 ###############################################################################
 888 __syscall_exit:
 889         LEDS            0x6300
 890
 891         sti             gr8,@(gr28,#REG_GR(8))  ; save return value
 892
 893         # rebuild saved psr - execve will change it for init/main.c
 894         ldi             @(gr28,#REG_PSR),gr22
 895         srli            gr22,#1,gr5
 896         andi.p          gr22,#~PSR_PS,gr22
 897         andi            gr5,#PSR_PS,gr5
 898         or              gr5,gr22,gr22
 899         ori             gr22,#PSR_S,gr22
 900
 901         # keep current PSR in GR23
 902         movsg           psr,gr23
 903
 904         # make sure we don't miss an interrupt setting need_resched or sigpending between
 905         # sampling and the RETT
 906         ori             gr23,#PSR_PIL_14,gr23
 907         movgs           gr23,psr
 908
 909         ldi             @(gr15,#TI_FLAGS),gr4
 910         sethi.p         %hi(_TIF_ALLWORK_MASK),gr5
 911         setlo           %lo(_TIF_ALLWORK_MASK),gr5
 912         andcc           gr4,gr5,gr0,icc0
 913         bne             icc0,#0,__syscall_exit_work
 914
 915         # restore all registers and return
 916 __entry_return_direct:
 917         LEDS            0x6301
 918
 919         andi            gr22,#~PSR_ET,gr22
 920         movgs           gr22,psr
 921
 922         ldi             @(gr28,#REG_ISR),gr23
 923         lddi            @(gr28,#REG_CCR),gr24
 924         lddi            @(gr28,#REG_LR) ,gr26
 925         ldi             @(gr28,#REG_PC) ,gr21
 926         ldi             @(gr28,#REG_TBR),gr20
 927
 928         movgs           gr20,tbr
 929         movgs           gr21,pcsr
 930         movgs           gr23,isr
 931         movgs           gr24,ccr
 932         movgs           gr25,cccr
 933         movgs           gr26,lr
 934         movgs           gr27,lcr
 935
 936         lddi            @(gr28,#REG_GNER0),gr4
 937         movgs           gr4,gner0
 938         movgs           gr5,gner1
 939
 940         lddi            @(gr28,#REG_IACC0),gr4
 941         movgs           gr4,iacc0h
 942         movgs           gr5,iacc0l
 943
 944         lddi            @(gr28,#REG_GR(4)) ,gr4
 945         lddi            @(gr28,#REG_GR(6)) ,gr6
 946         lddi            @(gr28,#REG_GR(8)) ,gr8
 947         lddi            @(gr28,#REG_GR(10)),gr10
 948         lddi            @(gr28,#REG_GR(12)),gr12
 949         lddi            @(gr28,#REG_GR(14)),gr14
 950         lddi            @(gr28,#REG_GR(16)),gr16
 951         lddi            @(gr28,#REG_GR(18)),gr18
 952         lddi            @(gr28,#REG_GR(20)),gr20
 953         lddi            @(gr28,#REG_GR(22)),gr22
 954         lddi            @(gr28,#REG_GR(24)),gr24
 955         lddi            @(gr28,#REG_GR(26)),gr26
 956         ldi             @(gr28,#REG_GR(29)),gr29
 957         lddi            @(gr28,#REG_GR(30)),gr30
 958
 959         # check to see if a debugging return is required
 960         LEDS            0x67f0
 961         movsg           ccr,gr2
 962         ldi             @(gr28,#REG__STATUS),gr3
 963         andicc          gr3,#REG__STATUS_STEP,gr0,icc0
 964         bne             icc0,#0,__entry_return_singlestep
 965         movgs           gr2,ccr
 966
 967         ldi             @(gr28,#REG_SP)    ,sp
 968         lddi            @(gr28,#REG_GR(2)) ,gr2
 969         ldi             @(gr28,#REG_GR(28)),gr28
 970
 971         LEDS            0x67fe
 972 //      movsg           pcsr,gr31
 973 //      LEDS32
 974
 975 #if 0
 976         # store the current frame in the workram on the FR451
 977         movgs           gr28,scr2
 978         sethi.p         %hi(0xfe800000),gr28
 979         setlo           %lo(0xfe800000),gr28
 980
 981         stdi            gr2,@(gr28,#REG_GR(2))
 982         stdi            gr4,@(gr28,#REG_GR(4))
 983         stdi            gr6,@(gr28,#REG_GR(6))
 984         stdi            gr8,@(gr28,#REG_GR(8))
 985         stdi            gr10,@(gr28,#REG_GR(10))
 986         stdi            gr12,@(gr28,#REG_GR(12))
 987         stdi            gr14,@(gr28,#REG_GR(14))
 988         stdi            gr16,@(gr28,#REG_GR(16))
 989         stdi            gr18,@(gr28,#REG_GR(18))
 990         stdi            gr24,@(gr28,#REG_GR(24))
 991         stdi            gr26,@(gr28,#REG_GR(26))
 992         sti             gr29,@(gr28,#REG_GR(29))
 993         stdi            gr30,@(gr28,#REG_GR(30))
 994
 995         movsg           tbr ,gr30
 996         sti             gr30,@(gr28,#REG_TBR)
 997         movsg           pcsr,gr30
 998         sti             gr30,@(gr28,#REG_PC)
 999         movsg           psr ,gr30
1000         sti             gr30,@(gr28,#REG_PSR)
1001         movsg           isr ,gr30
1002         sti             gr30,@(gr28,#REG_ISR)
1003         movsg           ccr ,gr30
1004         movsg           cccr,gr31
1005         stdi            gr30,@(gr28,#REG_CCR)
1006         movsg           lr  ,gr30
1007         movsg           lcr ,gr31
1008         stdi            gr30,@(gr28,#REG_LR)
1009         sti             gr0 ,@(gr28,#REG_SYSCALLNO)
1010         movsg           scr2,gr28
1011 #endif
1012
1013         rett            #0
1014
1015         # return via break.S
1016 __entry_return_singlestep:
1017         movgs           gr2,ccr
1018         lddi            @(gr28,#REG_GR(2)) ,gr2
1019         ldi             @(gr28,#REG_SP)    ,sp
1020         ldi             @(gr28,#REG_GR(28)),gr28
1021         LEDS            0x67ff
1022         break
1023         .globl          __entry_return_singlestep_breaks_here
1024 __entry_return_singlestep_breaks_here:
1025         nop
1026
1027
1028 ###############################################################################
1029 #
1030 # return to a process interrupted in kernel space
1031 # - we need to consider preemption if that is enabled
1032 #
1033 ###############################################################################
1034         .balign         L1_CACHE_BYTES
1035 __entry_return_from_kernel_exception:
1036         LEDS            0x6302
1037         movsg           psr,gr23
1038         ori             gr23,#PSR_PIL_14,gr23
1039         movgs           gr23,psr
1040         bra             __entry_return_direct
1041
1042         .balign         L1_CACHE_BYTES
1043 __entry_return_from_kernel_interrupt:
1044         LEDS            0x6303
1045         movsg           psr,gr23
1046         ori             gr23,#PSR_PIL_14,gr23
1047         movgs           gr23,psr
1048
1049 #ifdef CONFIG_PREEMPT
1050         ldi             @(gr15,#TI_PRE_COUNT),gr5
1051         subicc          gr5,#0,gr0,icc0
1052         beq             icc0,#0,__entry_return_direct
1053
1054 __entry_preempt_need_resched:
1055         ldi             @(gr15,#TI_FLAGS),gr4
1056         andicc          gr4,#_TIF_NEED_RESCHED,gr0,icc0
1057         beq             icc0,#1,__entry_return_direct
1058
1059         setlos          #PREEMPT_ACTIVE,gr5
1060         sti             gr5,@(gr15,#TI_FLAGS)
1061
1062         andi            gr23,#~PSR_PIL,gr23
1063         movgs           gr23,psr
1064
1065         call            schedule
1066         sti             gr0,@(gr15,#TI_PRE_COUNT)
1067
1068         movsg           psr,gr23
1069         ori             gr23,#PSR_PIL_14,gr23
1070         movgs           gr23,psr
1071         bra             __entry_preempt_need_resched
1072 #else
1073         bra             __entry_return_direct
1074 #endif
1075
1076
1077 ###############################################################################
1078 #
1079 # perform work that needs to be done immediately before resumption
1080 #
1081 ###############################################################################
1082         .globl          __entry_return_from_user_exception
1083         .balign         L1_CACHE_BYTES
1084 __entry_return_from_user_exception:
1085         LEDS            0x6501
1086
1087 __entry_resume_userspace:
1088         # make sure we don't miss an interrupt setting need_resched or sigpending between
1089         # sampling and the RETT
1090         movsg           psr,gr23
1091         ori             gr23,#PSR_PIL_14,gr23
1092         movgs           gr23,psr
1093
1094 __entry_return_from_user_interrupt:
1095         LEDS            0x6402
1096         ldi             @(gr15,#TI_FLAGS),gr4
1097         sethi.p         %hi(_TIF_WORK_MASK),gr5
1098         setlo           %lo(_TIF_WORK_MASK),gr5
1099         andcc           gr4,gr5,gr0,icc0
1100         beq             icc0,#1,__entry_return_direct
1101
1102 __entry_work_pending:
1103         LEDS            0x6404
1104         andicc          gr4,#_TIF_NEED_RESCHED,gr0,icc0
1105         beq             icc0,#1,__entry_work_notifysig
1106
1107 __entry_work_resched:
1108         LEDS            0x6408
1109         movsg           psr,gr23
1110         andi            gr23,#~PSR_PIL,gr23
1111         movgs           gr23,psr
1112         call            schedule
1113         movsg           psr,gr23
1114         ori             gr23,#PSR_PIL_14,gr23
1115         movgs           gr23,psr
1116
1117         LEDS            0x6401
1118         ldi             @(gr15,#TI_FLAGS),gr4
1119         sethi.p         %hi(_TIF_WORK_MASK),gr5
1120         setlo           %lo(_TIF_WORK_MASK),gr5
1121         andcc           gr4,gr5,gr0,icc0
1122         beq             icc0,#1,__entry_return_direct
1123         andicc          gr4,#_TIF_NEED_RESCHED,gr0,icc0
1124         bne             icc0,#1,__entry_work_resched
1125
1126 __entry_work_notifysig:
1127         LEDS            0x6410
1128         ori.p           gr4,#0,gr8
1129         call            do_notify_resume
1130         bra             __entry_resume_userspace
1131
1132         # perform syscall entry tracing
1133 __syscall_trace_entry:
1134         LEDS            0x6320
1135         setlos.p        #0,gr8
1136         call            do_syscall_trace
1137
1138         ldi             @(gr28,#REG_SYSCALLNO),gr7
1139         lddi            @(gr28,#REG_GR(8)) ,gr8
1140         lddi            @(gr28,#REG_GR(10)),gr10
1141         lddi.p          @(gr28,#REG_GR(12)),gr12
1142
1143         subicc          gr7,#nr_syscalls,gr0,icc0
1144         bnc             icc0,#0,__syscall_badsys
1145         bra             __syscall_call
1146
1147         # perform syscall exit tracing
1148 __syscall_exit_work:
1149         LEDS            0x6340
1150         andicc          gr4,#_TIF_SYSCALL_TRACE,gr0,icc0
1151         beq             icc0,#1,__entry_work_pending
1152
1153         movsg           psr,gr23
1154         andi            gr23,#~PSR_PIL,gr23     ; could let do_syscall_trace() call schedule()
1155         movgs           gr23,psr
1156
1157         setlos.p        #1,gr8
1158         call            do_syscall_trace
1159         bra             __entry_resume_userspace
1160
1161 __syscall_badsys:
1162         LEDS            0x6380
1163         setlos          #-ENOSYS,gr8
1164         sti             gr8,@(gr28,#REG_GR(8))  ; save return value
1165         bra             __entry_resume_userspace
1166
1167
1168 ###############################################################################
1169 #
1170 # syscall vector table
1171 #
1172 ###############################################################################
1173 #ifdef CONFIG_MMU
1174 #define __MMU(X) X
1175 #else
1176 #define __MMU(X) sys_ni_syscall
1177 #endif
1178
1179         .section .rodata
1180 ALIGN
1181         .globl          sys_call_table
1182 sys_call_table:
1183         .long sys_restart_syscall       /* 0 - old "setup()" system call, used for restarting */
1184         .long sys_exit
1185         .long sys_fork
1186         .long sys_read
1187         .long sys_write
1188         .long sys_open          /* 5 */
1189         .long sys_close
1190         .long sys_waitpid
1191         .long sys_creat
1192         .long sys_link
1193         .long sys_unlink                /* 10 */
1194         .long sys_execve
1195         .long sys_chdir
1196         .long sys_time
1197         .long sys_mknod
1198         .long sys_chmod         /* 15 */
1199         .long sys_lchown16
1200         .long sys_ni_syscall                    /* old break syscall holder */
1201         .long sys_stat
1202         .long sys_lseek
1203         .long sys_getpid                /* 20 */
1204         .long sys_mount
1205         .long sys_oldumount
1206         .long sys_setuid16
1207         .long sys_getuid16
1208         .long sys_ni_syscall // sys_stime               /* 25 */
1209         .long sys_ptrace
1210         .long sys_alarm
1211         .long sys_fstat
1212         .long sys_pause
1213         .long sys_utime         /* 30 */
1214         .long sys_ni_syscall                    /* old stty syscall holder */
1215         .long sys_ni_syscall                    /* old gtty syscall holder */
1216         .long sys_access
1217         .long sys_nice
1218         .long sys_ni_syscall    /* 35 */        /* old ftime syscall holder */
1219         .long sys_sync
1220         .long sys_kill
1221         .long sys_rename
1222         .long sys_mkdir
1223         .long sys_rmdir         /* 40 */
1224         .long sys_dup
1225         .long sys_pipe
1226         .long sys_times
1227         .long sys_ni_syscall                    /* old prof syscall holder */
1228         .long sys_brk           /* 45 */
1229         .long sys_setgid16
1230         .long sys_getgid16
1231         .long sys_ni_syscall // sys_signal
1232         .long sys_geteuid16
1233         .long sys_getegid16     /* 50 */
1234         .long sys_acct
1235         .long sys_umount                                /* recycled never used phys( */
1236         .long sys_ni_syscall                    /* old lock syscall holder */
1237         .long sys_ioctl
1238         .long sys_fcntl         /* 55 */
1239         .long sys_ni_syscall                    /* old mpx syscall holder */
1240         .long sys_setpgid
1241         .long sys_ni_syscall                    /* old ulimit syscall holder */
1242         .long sys_ni_syscall                    /* old old uname syscall */
1243         .long sys_umask         /* 60 */
1244         .long sys_chroot
1245         .long sys_ustat
1246         .long sys_dup2
1247         .long sys_getppid
1248         .long sys_getpgrp       /* 65 */
1249         .long sys_setsid
1250         .long sys_sigaction
1251         .long sys_ni_syscall // sys_sgetmask
1252         .long sys_ni_syscall // sys_ssetmask
1253         .long sys_setreuid16    /* 70 */
1254         .long sys_setregid16
1255         .long sys_sigsuspend
1256         .long sys_ni_syscall // sys_sigpending
1257         .long sys_sethostname
1258         .long sys_setrlimit     /* 75 */
1259         .long sys_ni_syscall // sys_old_getrlimit
1260         .long sys_getrusage
1261         .long sys_gettimeofday
1262         .long sys_settimeofday
1263         .long sys_getgroups16   /* 80 */
1264         .long sys_setgroups16
1265         .long sys_ni_syscall                    /* old_select slot */
1266         .long sys_symlink
1267         .long sys_lstat
1268         .long sys_readlink              /* 85 */
1269         .long sys_uselib
1270         .long sys_swapon
1271         .long sys_reboot
1272         .long sys_ni_syscall // old_readdir
1273         .long sys_ni_syscall    /* 90 */        /* old_mmap slot */
1274         .long sys_munmap
1275         .long sys_truncate
1276         .long sys_ftruncate
1277         .long sys_fchmod
1278         .long sys_fchown16              /* 95 */
1279         .long sys_getpriority
1280         .long sys_setpriority
1281         .long sys_ni_syscall                    /* old profil syscall holder */
1282         .long sys_statfs
1283         .long sys_fstatfs               /* 100 */
1284         .long sys_ni_syscall                    /* ioperm for i386 */
1285         .long sys_socketcall
1286         .long sys_syslog
1287         .long sys_setitimer
1288         .long sys_getitimer     /* 105 */
1289         .long sys_newstat
1290         .long sys_newlstat
1291         .long sys_newfstat
1292         .long sys_ni_syscall    /* obsolete olduname( syscall */
1293         .long sys_ni_syscall    /* iopl for i386 */ /* 110 */
1294         .long sys_vhangup
1295         .long sys_ni_syscall    /* obsolete idle( syscall */
1296         .long sys_ni_syscall    /* vm86old for i386 */
1297         .long sys_wait4
1298         .long sys_swapoff               /* 115 */
1299         .long sys_sysinfo
1300         .long sys_ipc
1301         .long sys_fsync
1302         .long sys_sigreturn
1303         .long sys_clone         /* 120 */
1304         .long sys_setdomainname
1305         .long sys_newuname
1306         .long sys_ni_syscall    /* old "cacheflush" */
1307         .long sys_adjtimex
1308         .long __MMU(sys_mprotect) /* 125 */
1309         .long sys_sigprocmask
1310         .long sys_ni_syscall    /* old "create_module" */
1311         .long sys_init_module
1312         .long sys_delete_module
1313         .long sys_ni_syscall    /* old "get_kernel_syms" */
1314         .long sys_quotactl
1315         .long sys_getpgid
1316         .long sys_fchdir
1317         .long sys_bdflush
1318         .long sys_sysfs         /* 135 */
1319         .long sys_personality
1320         .long sys_ni_syscall    /* for afs_syscall */
1321         .long sys_setfsuid16
1322         .long sys_setfsgid16
1323         .long sys_llseek                /* 140 */
1324         .long sys_getdents
1325         .long sys_select
1326         .long sys_flock
1327         .long __MMU(sys_msync)
1328         .long sys_readv         /* 145 */
1329         .long sys_writev
1330         .long sys_getsid
1331         .long sys_fdatasync
1332         .long sys_sysctl
1333         .long __MMU(sys_mlock)          /* 150 */
1334         .long __MMU(sys_munlock)
1335         .long __MMU(sys_mlockall)
1336         .long __MMU(sys_munlockall)
1337         .long sys_sched_setparam
1338         .long sys_sched_getparam   /* 155 */
1339         .long sys_sched_setscheduler
1340         .long sys_sched_getscheduler
1341         .long sys_sched_yield
1342         .long sys_sched_get_priority_max
1343         .long sys_sched_get_priority_min  /* 160 */
1344         .long sys_sched_rr_get_interval
1345         .long sys_nanosleep
1346         .long __MMU(sys_mremap)
1347         .long sys_setresuid16
1348         .long sys_getresuid16   /* 165 */
1349         .long sys_ni_syscall    /* for vm86 */
1350         .long sys_ni_syscall    /* Old sys_query_module */
1351         .long sys_poll
1352         .long sys_nfsservctl
1353         .long sys_setresgid16   /* 170 */
1354         .long sys_getresgid16
1355         .long sys_prctl
1356         .long sys_rt_sigreturn
1357         .long sys_rt_sigaction
1358         .long sys_rt_sigprocmask        /* 175 */
1359         .long sys_rt_sigpending
1360         .long sys_rt_sigtimedwait
1361         .long sys_rt_sigqueueinfo
1362         .long sys_rt_sigsuspend
1363         .long sys_pread64               /* 180 */
1364         .long sys_pwrite64
1365         .long sys_chown16
1366         .long sys_getcwd
1367         .long sys_capget
1368         .long sys_capset           /* 185 */
1369         .long sys_sigaltstack
1370         .long sys_sendfile
1371         .long sys_ni_syscall            /* streams1 */
1372         .long sys_ni_syscall            /* streams2 */
1373         .long sys_vfork            /* 190 */
1374         .long sys_getrlimit
1375         .long sys_mmap2
1376         .long sys_truncate64
1377         .long sys_ftruncate64
1378         .long sys_stat64                /* 195 */
1379         .long sys_lstat64
1380         .long sys_fstat64
1381         .long sys_lchown
1382         .long sys_getuid
1383         .long sys_getgid                /* 200 */
1384         .long sys_geteuid
1385         .long sys_getegid
1386         .long sys_setreuid
1387         .long sys_setregid
1388         .long sys_getgroups     /* 205 */
1389         .long sys_setgroups
1390         .long sys_fchown
1391         .long sys_setresuid
1392         .long sys_getresuid
1393         .long sys_setresgid     /* 210 */
1394         .long sys_getresgid
1395         .long sys_chown
1396         .long sys_setuid
1397         .long sys_setgid
1398         .long sys_setfsuid              /* 215 */
1399         .long sys_setfsgid
1400         .long sys_pivot_root
1401         .long __MMU(sys_mincore)
1402         .long __MMU(sys_madvise)
1403         .long sys_getdents64    /* 220 */
1404         .long sys_fcntl64
1405         .long sys_ni_syscall    /* reserved for TUX */
1406         .long sys_ni_syscall    /* Reserved for Security */
1407         .long sys_gettid
1408         .long sys_readahead     /* 225 */
1409         .long sys_setxattr
1410         .long sys_lsetxattr
1411         .long sys_fsetxattr
1412         .long sys_getxattr
1413         .long sys_lgetxattr     /* 230 */
1414         .long sys_fgetxattr
1415         .long sys_listxattr
1416         .long sys_llistxattr
1417         .long sys_flistxattr
1418         .long sys_removexattr   /* 235 */
1419         .long sys_lremovexattr
1420         .long sys_fremovexattr
1421         .long sys_tkill
1422         .long sys_sendfile64
1423         .long sys_futex         /* 240 */
1424         .long sys_sched_setaffinity
1425         .long sys_sched_getaffinity
1426         .long sys_ni_syscall    //sys_set_thread_area
1427         .long sys_ni_syscall    //sys_get_thread_area
1428         .long sys_io_setup      /* 245 */
1429         .long sys_io_destroy
1430         .long sys_io_getevents
1431         .long sys_io_submit
1432         .long sys_io_cancel
1433         .long sys_fadvise64     /* 250 */
1434         .long sys_ni_syscall
1435         .long sys_exit_group
1436         .long sys_lookup_dcookie
1437         .long sys_epoll_create
1438         .long sys_epoll_ctl     /* 255 */
1439         .long sys_epoll_wait
1440         .long __MMU(sys_remap_file_pages)
1441         .long sys_set_tid_address
1442         .long sys_timer_create
1443         .long sys_timer_settime         /* 260 */
1444         .long sys_timer_gettime
1445         .long sys_timer_getoverrun
1446         .long sys_timer_delete
1447         .long sys_clock_settime
1448         .long sys_clock_gettime         /* 265 */
1449         .long sys_clock_getres
1450         .long sys_clock_nanosleep
1451         .long sys_statfs64
1452         .long sys_fstatfs64
1453         .long sys_tgkill        /* 270 */
1454         .long sys_utimes
1455         .long sys_fadvise64_64
1456         .long sys_ni_syscall    /* sys_vserver */
1457         .long sys_mbind
1458         .long sys_get_mempolicy
1459         .long sys_set_mempolicy
1460         .long sys_mq_open
1461         .long sys_mq_unlink
1462         .long sys_mq_timedsend
1463         .long sys_mq_timedreceive       /* 280 */
1464         .long sys_mq_notify
1465         .long sys_mq_getsetattr
1466         .long sys_ni_syscall            /* reserved for kexec */
1467         .long sys_waitid
1468         .long sys_ni_syscall            /* 285 */ /* available */
1469         .long sys_add_key
1470         .long sys_request_key
1471         .long sys_keyctl
1472         .long sys_ioprio_set
1473         .long sys_ioprio_get            /* 290 */
1474         .long sys_inotify_init
1475         .long sys_inotify_add_watch
1476         .long sys_inotify_rm_watch
1477         .long sys_migrate_pages
1478         .long sys_openat                /* 295 */
1479         .long sys_mkdirat
1480         .long sys_mknodat
1481         .long sys_fchownat
1482         .long sys_futimesat
1483         .long sys_newfstatat            /* 300 */
1484         .long sys_unlinkat
1485         .long sys_renameat
1486         .long sys_linkat
1487         .long sys_symlinkat
1488         .long sys_readlinkat            /* 305 */
1489         .long sys_fchmodat
1490         .long sys_faccessat
1491         .long sys_pselect6
1492         .long sys_ppoll
1493
1494
1495 syscall_table_size = (. - sys_call_table)