projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 51533b61 MS |
1 | /* |
| 2 | * Copyright (C) 2000-2003 Axis Communications AB | |
| 3 | * | |
| 4 | * Authors: Bjorn Wesen (bjornw@axis.com) | |
| 5 | * Tobias Anderberg (tobiasa@axis.com), CRISv32 port. | |
| 6 | * | |
| 7 | * Code for the system-call and fault low-level handling routines. | |
| 8 | * | |
| 9 | * NOTE: This code handles signal-recognition, which happens every time | |
| 10 | * after a timer-interrupt and after each system call. | |
| 11 | * | |
| 12 | * Stack layout in 'ret_from_system_call': | |
| ffc8b00d | 13 | * ptrace needs to have all regs on the stack. |
| 51533b61 MS |
14 | * if the order here is changed, it needs to be |
| 15 | * updated in fork.c:copy_process, signal.c:do_signal, | |
| 16 | * ptrace.c and ptrace.h | |
| 17 | * | |
| 18 | */ | |
| 19 | ||
| 51533b61 MS |
20 | #include <linux/linkage.h> |
| 21 | #include <linux/sys.h> | |
| 22 | #include <asm/unistd.h> | |
| 23 | #include <asm/errno.h> | |
| 24 | #include <asm/thread_info.h> | |
| 5a077369 | 25 | #include <asm/asm-offsets.h> |
| 51533b61 | 26 | |
| 556dcee7 JN |
27 | #include <hwregs/asm/reg_map_asm.h> |
| 28 | #include <hwregs/asm/intr_vect_defs_asm.h> | |
| 51533b61 MS |
29 | |
| 30 | ;; Exported functions. | |
| 31 | .globl system_call | |
| 32 | .globl ret_from_intr | |
| 33 | .globl ret_from_fork | |
| 34 | .globl resume | |
| 35 | .globl multiple_interrupt | |
| 36 | .globl nmi_interrupt | |
| 37 | .globl spurious_interrupt | |
| 38 | .globl do_sigtrap | |
| 39 | .globl gdb_handle_exception | |
| 40 | .globl sys_call_table | |
| 41 | ||
| 42 | ; Check if preemptive kernel scheduling should be done. | |
| 43 | #ifdef CONFIG_PREEMPT | |
| 44 | _resume_kernel: | |
| 45 | di | |
| 46 | ; Load current task struct. | |
| 47 | movs.w -8192, $r0 ; THREAD_SIZE = 8192 | |
| 48 | and.d $sp, $r0 | |
| 49 | ||
| 50 | addoq +TI_preempt_count, $r0, $acr | |
| 51 | move.d [$acr], $r10 ; Preemption disabled? | |
| 52 | bne _Rexit | |
| 53 | nop | |
| 54 | ||
| 55 | _need_resched: | |
| 56 | addoq +TI_flags, $r0, $acr | |
| 57 | move.d [$acr], $r10 | |
| 58 | btstq TIF_NEED_RESCHED, $r10 ; Check if need_resched is set. | |
| 59 | bpl _Rexit | |
| 60 | nop | |
| 61 | ||
| 62 | ; Do preemptive kernel scheduling. | |
| 63 | jsr preempt_schedule_irq | |
| 64 | nop | |
| 65 | ||
| 66 | ; Load new task struct. | |
| 67 | movs.w -8192, $r0 ; THREAD_SIZE = 8192. | |
| 68 | and.d $sp, $r0 | |
| 69 | ||
| 70 | ; One more time with new task. | |
| 71 | ba _need_resched | |
| 72 | nop | |
| 73 | #else | |
| 74 | #define _resume_kernel _Rexit | |
| 75 | #endif | |
| 76 | ||
| 77 | ; Called at exit from fork. schedule_tail must be called to drop | |
| 78 | ; spinlock if CONFIG_PREEMPT. | |
| a80a635f | 79 | .type ret_from_fork,@function |
| 51533b61 MS |
80 | ret_from_fork: |
| 81 | jsr schedule_tail | |
| 82 | nop | |
| 83 | ba ret_from_sys_call | |
| 84 | nop | |
| a80a635f | 85 | .size ret_from_fork, . - ret_from_fork |
| 51533b61 | 86 | |
| a80a635f | 87 | .type ret_from_intr,@function |
| 51533b61 MS |
88 | ret_from_intr: |
| 89 | ;; Check for resched if preemptive kernel, or if we're going back to | |
| 90 | ;; user-mode. This test matches the user_regs(regs) macro. Don't simply | |
| 91 | ;; test CCS since that doesn't necessarily reflect what mode we'll | |
| 92 | ;; return into. | |
| 93 | addoq +PT_ccs, $sp, $acr | |
| 94 | move.d [$acr], $r0 | |
| 95 | btstq 16, $r0 ; User-mode flag. | |
| 96 | bpl _resume_kernel | |
| a80a635f | 97 | .size ret_from_intr, . - ret_from_intr + 2 ; +2 includes the dslot. |
| 51533b61 MS |
98 | |
| 99 | ; Note that di below is in delay slot. | |
| a80a635f | 100 | .type _resume_userspace,@function |
| 51533b61 MS |
101 | _resume_userspace: |
| 102 | di ; So need_resched and sigpending don't change. | |
| 103 | ||
| 104 | movs.w -8192, $r0 ; THREAD_SIZE == 8192 | |
| 105 | and.d $sp, $r0 | |
| 106 | ||
| 107 | addoq +TI_flags, $r0, $acr ; current->work | |
| 108 | move.d [$acr], $r10 | |
| 109 | and.d _TIF_WORK_MASK, $r10 ; Work to be done on return? | |
| 110 | bne _work_pending | |
| 111 | nop | |
| 112 | ba _Rexit | |
| 113 | nop | |
| a80a635f | 114 | .size _resume_userspace, . - _resume_userspace |
| 51533b61 MS |
115 | |
| 116 | ;; The system_call is called by a BREAK instruction, which looks pretty | |
| 117 | ;; much like any other exception. | |
| 118 | ;; | |
| 119 | ;; System calls can't be made from interrupts but we still stack ERP | |
| 120 | ;; to have a complete stack frame. | |
| 121 | ;; | |
| 122 | ;; In r9 we have the wanted syscall number. Arguments come in r10,r11,r12, | |
| 123 | ;; r13,mof,srp | |
| 124 | ;; | |
| 125 | ;; This function looks on the _surface_ like spaghetti programming, but it's | |
| 126 | ;; really designed so that the fast-path does not force cache-loading of | |
| 127 | ;; non-used instructions. Only the non-common cases cause the outlined code | |
| 128 | ;; to run.. | |
| 129 | ||
| a80a635f | 130 | .type system_call,@function |
| 51533b61 MS |
131 | system_call: |
| 132 | ;; Stack-frame similar to the irq heads, which is reversed in | |
| 133 | ;; ret_from_sys_call. | |
| cd4f2011 JN |
134 | |
| 135 | sub.d 92, $sp ; Skip EXS and EDA. | |
| 136 | movem $r13, [$sp] | |
| 137 | move.d $sp, $r8 | |
| 138 | addq 14*4, $r8 | |
| 139 | move.d $acr, $r0 | |
| 140 | move $srs, $r1 | |
| 141 | move $mof, $r2 | |
| 142 | move $spc, $r3 | |
| 143 | move $ccs, $r4 | |
| 144 | move $srp, $r5 | |
| 145 | move $erp, $r6 | |
| 51533b61 | 146 | subq 4, $sp |
| cd4f2011 JN |
147 | movem $r6, [$r8] |
| 148 | ei ; Enable interrupts while processing syscalls. | |
| 149 | move.d $r10, [$sp] | |
| 51533b61 | 150 | |
| cd4f2011 | 151 | ; Set S-bit when kernel debugging to keep hardware breakpoints active. |
| 51533b61 MS |
152 | #ifdef CONFIG_ETRAX_KGDB |
| 153 | move $ccs, $r0 | |
| 154 | or.d (1<<9), $r0 | |
| 155 | move $r0, $ccs | |
| 156 | #endif | |
| 157 | ||
| 158 | movs.w -ENOSYS, $r0 | |
| 159 | addoq +PT_r10, $sp, $acr | |
| 160 | move.d $r0, [$acr] | |
| 161 | ||
| 162 | ;; Check if this process is syscall-traced. | |
| 163 | movs.w -8192, $r0 ; THREAD_SIZE == 8192 | |
| 164 | and.d $sp, $r0 | |
| 165 | ||
| 166 | addoq +TI_flags, $r0, $acr | |
| 167 | move.d [$acr], $r0 | |
| 168 | btstq TIF_SYSCALL_TRACE, $r0 | |
| 169 | bmi _syscall_trace_entry | |
| 170 | nop | |
| 171 | ||
| 172 | _syscall_traced: | |
| 173 | ;; Check for sanity in the requested syscall number. | |
| 174 | cmpu.w NR_syscalls, $r9 | |
| 175 | bhs ret_from_sys_call | |
| 176 | lslq 2, $r9 ; Multiply by 4, in the delay slot. | |
| 177 | ||
| 178 | ;; The location on the stack for the register structure is passed as a | |
| 179 | ;; seventh argument. Some system calls need this. | |
| 180 | move.d $sp, $r0 | |
| 181 | subq 4, $sp | |
| 182 | move.d $r0, [$sp] | |
| 183 | ||
| 184 | ;; The registers carrying parameters (R10-R13) are intact. The optional | |
| 25985edc | 185 | ;; fifth and sixth parameters is in MOF and SRP respectively. Put them |
| 51533b61 MS |
186 | ;; back on the stack. |
| 187 | subq 4, $sp | |
| 188 | move $srp, [$sp] | |
| 189 | subq 4, $sp | |
| 190 | move $mof, [$sp] | |
| 191 | ||
| 192 | ;; Actually to the system call. | |
| 193 | addo.d +sys_call_table, $r9, $acr | |
| 194 | move.d [$acr], $acr | |
| 195 | jsr $acr | |
| 196 | nop | |
| 197 | ||
| 198 | addq 3*4, $sp ; Pop the mof, srp and regs parameters. | |
| 199 | addoq +PT_r10, $sp, $acr | |
| 200 | move.d $r10, [$acr] ; Save the return value. | |
| 201 | ||
| 202 | moveq 1, $r9 ; "Parameter" to ret_from_sys_call to | |
| 203 | ; show it was a sys call. | |
| 204 | ||
| 205 | ;; Fall through into ret_from_sys_call to return. | |
| 206 | ||
| 207 | ret_from_sys_call: | |
| 208 | ;; R9 is a parameter: | |
| 209 | ;; >= 1 from syscall | |
| 210 | ;; 0 from irq | |
| 211 | ||
| 212 | ;; Get the current task-struct pointer. | |
| 213 | movs.w -8192, $r0 ; THREAD_SIZE == 8192 | |
| 214 | and.d $sp, $r0 | |
| 215 | ||
| 216 | di ; Make sure need_resched and sigpending don't change. | |
| 217 | ||
| 218 | addoq +TI_flags, $r0, $acr | |
| 219 | move.d [$acr], $r1 | |
| 220 | and.d _TIF_ALLWORK_MASK, $r1 | |
| 221 | bne _syscall_exit_work | |
| 222 | nop | |
| a80a635f | 223 | .size system_call, . - system_call |
| 51533b61 | 224 | |
| a80a635f | 225 | .type _Rexit,@function |
| 51533b61 MS |
226 | _Rexit: |
| 227 | ;; This epilogue MUST match the prologues in multiple_interrupt, irq.h | |
| 228 | ;; and ptregs.h. | |
| 229 | addq 4, $sp ; Skip orig_r10. | |
| 230 | movem [$sp+], $r13 ; Registers R0-R13. | |
| 231 | move.d [$sp+], $acr | |
| 232 | move [$sp], $srs | |
| 233 | addq 4, $sp | |
| 234 | move [$sp+], $mof | |
| 235 | move [$sp+], $spc | |
| 236 | move [$sp+], $ccs | |
| 237 | move [$sp+], $srp | |
| 238 | move [$sp+], $erp | |
| 239 | addq 8, $sp ; Skip EXS, EDA. | |
| 240 | jump $erp | |
| 241 | rfe ; Restore condition code stack in delay-slot. | |
| a80a635f | 242 | .size _Rexit, . - _Rexit |
| 51533b61 MS |
243 | |
| 244 | ;; We get here after doing a syscall if extra work might need to be done | |
| 245 | ;; perform syscall exit tracing if needed. | |
| 246 | ||
| a80a635f | 247 | .type _syscall_exit_work,@function |
| 51533b61 MS |
248 | _syscall_exit_work: |
| 249 | ;; R0 contains current at this point and irq's are disabled. | |
| 250 | ||
| 251 | addoq +TI_flags, $r0, $acr | |
| 252 | move.d [$acr], $r1 | |
| 253 | btstq TIF_SYSCALL_TRACE, $r1 | |
| 254 | bpl _work_pending | |
| 255 | nop | |
| 256 | ei | |
| 257 | move.d $r9, $r1 ; Preserve R9. | |
| 258 | jsr do_syscall_trace | |
| 259 | nop | |
| 260 | move.d $r1, $r9 | |
| 261 | ba _resume_userspace | |
| 262 | nop | |
| a80a635f | 263 | .size _syscall_exit_work, . - _syscall_exit_work |
| 51533b61 | 264 | |
| a80a635f | 265 | .type _work_pending,@function |
| 51533b61 MS |
266 | _work_pending: |
| 267 | addoq +TI_flags, $r0, $acr | |
| 268 | move.d [$acr], $r10 | |
| 269 | btstq TIF_NEED_RESCHED, $r10 ; Need resched? | |
| 270 | bpl _work_notifysig ; No, must be signal/notify. | |
| 271 | nop | |
| a80a635f | 272 | .size _work_pending, . - _work_pending |
| 51533b61 | 273 | |
| a80a635f | 274 | .type _work_resched,@function |
| 51533b61 MS |
275 | _work_resched: |
| 276 | move.d $r9, $r1 ; Preserve R9. | |
| 277 | jsr schedule | |
| 278 | nop | |
| 279 | move.d $r1, $r9 | |
| 280 | di | |
| 281 | ||
| 282 | addoq +TI_flags, $r0, $acr | |
| 283 | move.d [$acr], $r1 | |
| 284 | and.d _TIF_WORK_MASK, $r1 ; Ignore sycall trace counter. | |
| 285 | beq _Rexit | |
| 286 | nop | |
| 287 | btstq TIF_NEED_RESCHED, $r1 | |
| 288 | bmi _work_resched ; current->work.need_resched. | |
| 289 | nop | |
| a80a635f | 290 | .size _work_resched, . - _work_resched |
| 51533b61 | 291 | |
| a80a635f | 292 | .type _work_notifysig,@function |
| 51533b61 MS |
293 | _work_notifysig: |
| 294 | ;; Deal with pending signals and notify-resume requests. | |
| 295 | ||
| 296 | addoq +TI_flags, $r0, $acr | |
| ffc8b00d JN |
297 | move.d [$acr], $r12 ; The thread_info_flags parameter. |
| 298 | move.d $sp, $r11 ; The regs param. | |
| 51533b61 | 299 | jsr do_notify_resume |
| ffc8b00d | 300 | move.d $r9, $r10 ; do_notify_resume syscall/irq param. |
| 51533b61 MS |
301 | |
| 302 | ba _Rexit | |
| 303 | nop | |
| a80a635f | 304 | .size _work_notifysig, . - _work_notifysig |
| 51533b61 MS |
305 | |
| 306 | ;; We get here as a sidetrack when we've entered a syscall with the | |
| 307 | ;; trace-bit set. We need to call do_syscall_trace and then continue | |
| 308 | ;; with the call. | |
| 309 | ||
| 310 | _syscall_trace_entry: | |
| 311 | ;; PT_r10 in the frame contains -ENOSYS as required, at this point. | |
| 312 | ||
| 313 | jsr do_syscall_trace | |
| 314 | nop | |
| 315 | ||
| 316 | ;; Now re-enter the syscall code to do the syscall itself. We need to | |
| 317 | ;; restore R9 here to contain the wanted syscall, and the other | |
| 318 | ;; parameter-bearing registers. | |
| 319 | addoq +PT_r9, $sp, $acr | |
| 320 | move.d [$acr], $r9 | |
| 321 | addoq +PT_orig_r10, $sp, $acr | |
| 322 | move.d [$acr], $r10 ; PT_r10 is already -ENOSYS. | |
| 323 | addoq +PT_r11, $sp, $acr | |
| 324 | move.d [$acr], $r11 | |
| 325 | addoq +PT_r12, $sp, $acr | |
| 326 | move.d [$acr], $r12 | |
| 327 | addoq +PT_r13, $sp, $acr | |
| 328 | move.d [$acr], $r13 | |
| 329 | addoq +PT_mof, $sp, $acr | |
| 330 | move [$acr], $mof | |
| 331 | addoq +PT_srp, $sp, $acr | |
| 332 | move [$acr], $srp | |
| 333 | ||
| 334 | ba _syscall_traced | |
| 335 | nop | |
| 336 | ||
| 337 | ;; Resume performs the actual task-switching, by switching stack | |
| 338 | ;; pointers. Input arguments are: | |
| 339 | ;; | |
| 340 | ;; R10 = prev | |
| 341 | ;; R11 = next | |
| 342 | ;; R12 = thread offset in task struct. | |
| 343 | ;; | |
| 344 | ;; Returns old current in R10. | |
| 345 | ||
| a80a635f | 346 | .type resume,@function |
| 51533b61 | 347 | resume: |
| 43f6cdd7 JN |
348 | subq 4, $sp ; Make space for srp. |
| 349 | ||
| 51533b61 MS |
350 | add.d $r12, $r10 ; R10 = current tasks tss. |
| 351 | addoq +THREAD_ccs, $r10, $acr | |
| 43f6cdd7 | 352 | move $srp, [$sp] ; Keep old/new PC on the stack. |
| 51533b61 MS |
353 | move $ccs, [$acr] ; Save IRQ enable state. |
| 354 | di | |
| 355 | ||
| 356 | addoq +THREAD_usp, $r10, $acr | |
| 43f6cdd7 | 357 | subq 10*4, $sp ; Make room for R9. |
| 51533b61 MS |
358 | move $usp, [$acr] ; Save user-mode stackpointer. |
| 359 | ||
| 360 | ;; See copy_thread for the reason why register R9 is saved. | |
| 51533b61 MS |
361 | movem $r9, [$sp] ; Save non-scratch registers and R9. |
| 362 | ||
| 363 | addoq +THREAD_ksp, $r10, $acr | |
| 43f6cdd7 | 364 | move.d $sp, $r10 ; Return last running task in R10. |
| 51533b61 MS |
365 | move.d $sp, [$acr] ; Save kernel SP for old task. |
| 366 | ||
| 51533b61 MS |
367 | and.d -8192, $r10 ; Get thread_info from stackpointer. |
| 368 | addoq +TI_task, $r10, $acr | |
| 51533b61 | 369 | add.d $r12, $r11 ; Find the new tasks tss. |
| 43f6cdd7 | 370 | move.d [$acr], $r10 ; Get task. |
| 51533b61 MS |
371 | addoq +THREAD_ksp, $r11, $acr |
| 372 | move.d [$acr], $sp ; Switch to new stackframe. | |
| 43f6cdd7 | 373 | addoq +THREAD_usp, $r11, $acr |
| 51533b61 MS |
374 | movem [$sp+], $r9 ; Restore non-scratch registers and R9. |
| 375 | ||
| 51533b61 MS |
376 | move [$acr], $usp ; Restore user-mode stackpointer. |
| 377 | ||
| 378 | addoq +THREAD_ccs, $r11, $acr | |
| 43f6cdd7 JN |
379 | move.d [$sp+], $r11 |
| 380 | jump $r11 ; Restore PC. | |
| 51533b61 | 381 | move [$acr], $ccs ; Restore IRQ enable status. |
| a80a635f | 382 | .size resume, . - resume |
| 51533b61 MS |
383 | |
| 384 | nmi_interrupt: | |
| 385 | ||
| 386 | ;; If we receive a watchdog interrupt while it is not expected, then set | |
| 387 | ;; up a canonical frame and dump register contents before dying. | |
| 388 | ||
| 389 | ;; This prologue MUST match the one in irq.h and the struct in ptregs.h! | |
| 390 | subq 12, $sp ; Skip EXS, EDA. | |
| 391 | move $nrp, [$sp] | |
| 392 | subq 4, $sp | |
| 393 | move $srp, [$sp] | |
| 394 | subq 4, $sp | |
| 395 | move $ccs, [$sp] | |
| 396 | subq 4, $sp | |
| 397 | move $spc, [$sp] | |
| 398 | subq 4, $sp | |
| 399 | move $mof, [$sp] | |
| 400 | subq 4, $sp | |
| 401 | move $srs, [$sp] | |
| 402 | subq 4, $sp | |
| 403 | move.d $acr, [$sp] | |
| 404 | subq 14*4, $sp ; Make room for R0-R13. | |
| 405 | movem $r13, [$sp] ; Push R0-R13. | |
| 406 | subq 4, $sp | |
| 407 | move.d $r10, [$sp] ; Push orig_r10. | |
| 408 | move.d REG_ADDR(intr_vect, regi_irq, r_nmi), $r0 | |
| 409 | move.d [$r0], $r0 | |
| 410 | btstq REG_BIT(intr_vect, r_nmi, watchdog), $r0 | |
| 411 | bpl 1f | |
| 412 | nop | |
| ffc8b00d | 413 | jsr handle_watchdog_bite ; In time.c. |
| 51533b61 MS |
414 | move.d $sp, $r10 ; Pointer to registers |
| 415 | 1: btstq REG_BIT(intr_vect, r_nmi, ext), $r0 | |
| 416 | bpl 1f | |
| 417 | nop | |
| 418 | jsr handle_nmi | |
| 419 | move.d $sp, $r10 ; Pointer to registers | |
| 420 | 1: addq 4, $sp ; Skip orig_r10 | |
| 421 | movem [$sp+], $r13 | |
| 422 | move.d [$sp+], $acr | |
| 423 | move [$sp], $srs | |
| 424 | addq 4, $sp | |
| 425 | move [$sp+], $mof | |
| 426 | move [$sp+], $spc | |
| 427 | move [$sp+], $ccs | |
| 428 | move [$sp+], $srp | |
| 429 | move [$sp+], $nrp | |
| 430 | addq 8, $sp ; Skip EXS, EDA. | |
| 431 | jump $nrp | |
| 432 | rfn | |
| 433 | ||
| 434 | .comm cause_of_death, 4 ;; Don't declare this anywhere. | |
| 435 | ||
| 436 | spurious_interrupt: | |
| 437 | di | |
| 438 | jump hard_reset_now | |
| 439 | nop | |
| 440 | ||
| 441 | ;; This handles the case when multiple interrupts arrive at the same | |
| 442 | ;; time. Jump to the first set interrupt bit in a priotiry fashion. The | |
| 443 | ;; hardware will call the unserved interrupts after the handler | |
| 444 | ;; finishes. | |
| a80a635f | 445 | .type multiple_interrupt, @function |
| 51533b61 MS |
446 | multiple_interrupt: |
| 447 | ;; This prologue MUST match the one in irq.h and the struct in ptregs.h! | |
| 448 | subq 12, $sp ; Skip EXS, EDA. | |
| 449 | move $erp, [$sp] | |
| 450 | subq 4, $sp | |
| 451 | move $srp, [$sp] | |
| 452 | subq 4, $sp | |
| 453 | move $ccs, [$sp] | |
| 454 | subq 4, $sp | |
| 455 | move $spc, [$sp] | |
| 456 | subq 4, $sp | |
| 457 | move $mof, [$sp] | |
| 458 | subq 4, $sp | |
| 459 | move $srs, [$sp] | |
| 460 | subq 4, $sp | |
| 461 | move.d $acr, [$sp] | |
| 462 | subq 14*4, $sp ; Make room for R0-R13. | |
| 463 | movem $r13, [$sp] ; Push R0-R13. | |
| 464 | subq 4, $sp | |
| 465 | move.d $r10, [$sp] ; Push orig_r10. | |
| 466 | ||
| 467 | ; Set S-bit when kernel debugging to keep hardware breakpoints active. | |
| 468 | #ifdef CONFIG_ETRAX_KGDB | |
| 469 | move $ccs, $r0 | |
| 470 | or.d (1<<9), $r0 | |
| 471 | move $r0, $ccs | |
| 472 | #endif | |
| 473 | ||
| 474 | jsr crisv32_do_multiple | |
| 475 | move.d $sp, $r10 | |
| 476 | jump ret_from_intr | |
| 477 | nop | |
| a80a635f | 478 | .size multiple_interrupt, . - multiple_interrupt |
| 51533b61 MS |
479 | |
| 480 | do_sigtrap: | |
| 481 | ;; Sigtraps the process that executed the BREAK instruction. Creates a | |
| 482 | ;; frame that Rexit expects. | |
| 483 | subq 4, $sp | |
| 484 | move $eda, [$sp] | |
| 485 | subq 4, $sp | |
| 486 | move $exs, [$sp] | |
| 487 | subq 4, $sp | |
| 488 | move $erp, [$sp] | |
| 489 | subq 4, $sp | |
| 490 | move $srp, [$sp] | |
| 491 | subq 4, $sp | |
| 492 | move $ccs, [$sp] | |
| 493 | subq 4, $sp | |
| 494 | move $spc, [$sp] | |
| 495 | subq 4, $sp | |
| 496 | move $mof, [$sp] | |
| 497 | subq 4, $sp | |
| 498 | move $srs, [$sp] | |
| 499 | subq 4, $sp | |
| 500 | move.d $acr, [$sp] | |
| 501 | di ; Need to disable irq's at this point. | |
| 502 | subq 14*4, $sp ; Make room for r0-r13. | |
| 503 | movem $r13, [$sp] ; Push the r0-r13 registers. | |
| 504 | subq 4, $sp | |
| 505 | move.d $r10, [$sp] ; Push orig_r10. | |
| 506 | ||
| 507 | movs.w -8192, $r9 ; THREAD_SIZE == 8192 | |
| 508 | and.d $sp, $r9 | |
| 509 | ||
| 510 | ;; thread_info as first parameter | |
| 511 | move.d $r9, $r10 | |
| 512 | moveq 5, $r11 ; SIGTRAP as second argument. | |
| 513 | jsr ugdb_trap_user | |
| 514 | nop | |
| 515 | jump ret_from_intr ; Use the return routine for interrupts. | |
| 516 | nop | |
| 517 | ||
| 518 | gdb_handle_exception: | |
| 519 | subq 4, $sp | |
| 520 | move.d $r0, [$sp] | |
| 521 | #ifdef CONFIG_ETRAX_KGDB | |
| 522 | move $ccs, $r0 ; U-flag not affected by previous insns. | |
| 523 | btstq 16, $r0 ; Test the U-flag. | |
| 524 | bmi _ugdb_handle_exception ; Go to user mode debugging. | |
| 525 | nop ; Empty delay-slot (cannot pop R0 here). | |
| 526 | ba kgdb_handle_exception ; Go to kernel debugging. | |
| 527 | move.d [$sp+], $r0 ; Restore R0 in delay slot. | |
| 528 | #endif | |
| 529 | ||
| 530 | _ugdb_handle_exception: | |
| 531 | ba do_sigtrap ; SIGTRAP the offending process. | |
| 532 | move.d [$sp+], $r0 ; Restore R0 in delay slot. | |
| 533 | ||
| ffc8b00d | 534 | .global kernel_execve |
| a80a635f | 535 | .type kernel_execve,@function |
| ffc8b00d JN |
536 | kernel_execve: |
| 537 | move.d __NR_execve, $r9 | |
| 538 | break 13 | |
| 539 | ret | |
| 540 | nop | |
| a80a635f | 541 | .size kernel_execve, . - kernel_execve |
| ffc8b00d | 542 | |
| 51533b61 MS |
543 | .data |
| 544 | ||
| 545 | .section .rodata,"a" | |
| 546 | sys_call_table: | |
| 547 | .long sys_restart_syscall ; 0 - old "setup()" system call, used | |
| 548 | ; for restarting. | |
| 549 | .long sys_exit | |
| 550 | .long sys_fork | |
| 551 | .long sys_read | |
| 552 | .long sys_write | |
| 553 | .long sys_open /* 5 */ | |
| 554 | .long sys_close | |
| 555 | .long sys_waitpid | |
| 556 | .long sys_creat | |
| 557 | .long sys_link | |
| 558 | .long sys_unlink /* 10 */ | |
| 559 | .long sys_execve | |
| 560 | .long sys_chdir | |
| 561 | .long sys_time | |
| 562 | .long sys_mknod | |
| 563 | .long sys_chmod /* 15 */ | |
| 564 | .long sys_lchown16 | |
| 565 | .long sys_ni_syscall /* old break syscall holder */ | |
| 566 | .long sys_stat | |
| 567 | .long sys_lseek | |
| 568 | .long sys_getpid /* 20 */ | |
| 569 | .long sys_mount | |
| 570 | .long sys_oldumount | |
| 571 | .long sys_setuid16 | |
| 572 | .long sys_getuid16 | |
| 573 | .long sys_stime /* 25 */ | |
| 574 | .long sys_ptrace | |
| 575 | .long sys_alarm | |
| 576 | .long sys_fstat | |
| 577 | .long sys_pause | |
| 578 | .long sys_utime /* 30 */ | |
| 579 | .long sys_ni_syscall /* old stty syscall holder */ | |
| 580 | .long sys_ni_syscall /* old gtty syscall holder */ | |
| 581 | .long sys_access | |
| 582 | .long sys_nice | |
| 583 | .long sys_ni_syscall /* 35 old ftime syscall holder */ | |
| 584 | .long sys_sync | |
| 585 | .long sys_kill | |
| 586 | .long sys_rename | |
| 587 | .long sys_mkdir | |
| 588 | .long sys_rmdir /* 40 */ | |
| 589 | .long sys_dup | |
| 590 | .long sys_pipe | |
| 591 | .long sys_times | |
| 592 | .long sys_ni_syscall /* old prof syscall holder */ | |
| 593 | .long sys_brk /* 45 */ | |
| 594 | .long sys_setgid16 | |
| 595 | .long sys_getgid16 | |
| 596 | .long sys_signal | |
| 597 | .long sys_geteuid16 | |
| 598 | .long sys_getegid16 /* 50 */ | |
| 599 | .long sys_acct | |
| 600 | .long sys_umount /* recycled never used phys( */ | |
| 601 | .long sys_ni_syscall /* old lock syscall holder */ | |
| 602 | .long sys_ioctl | |
| 603 | .long sys_fcntl /* 55 */ | |
| 604 | .long sys_ni_syscall /* old mpx syscall holder */ | |
| 605 | .long sys_setpgid | |
| 606 | .long sys_ni_syscall /* old ulimit syscall holder */ | |
| 607 | .long sys_ni_syscall /* old sys_olduname holder */ | |
| 608 | .long sys_umask /* 60 */ | |
| 609 | .long sys_chroot | |
| 610 | .long sys_ustat | |
| 611 | .long sys_dup2 | |
| 612 | .long sys_getppid | |
| 613 | .long sys_getpgrp /* 65 */ | |
| 614 | .long sys_setsid | |
| 615 | .long sys_sigaction | |
| 616 | .long sys_sgetmask | |
| 617 | .long sys_ssetmask | |
| 618 | .long sys_setreuid16 /* 70 */ | |
| 619 | .long sys_setregid16 | |
| 620 | .long sys_sigsuspend | |
| 621 | .long sys_sigpending | |
| 622 | .long sys_sethostname | |
| 623 | .long sys_setrlimit /* 75 */ | |
| 624 | .long sys_old_getrlimit | |
| 625 | .long sys_getrusage | |
| 626 | .long sys_gettimeofday | |
| 627 | .long sys_settimeofday | |
| 628 | .long sys_getgroups16 /* 80 */ | |
| 629 | .long sys_setgroups16 | |
| 630 | .long sys_select /* was old_select in Linux/E100 */ | |
| 631 | .long sys_symlink | |
| 632 | .long sys_lstat | |
| 633 | .long sys_readlink /* 85 */ | |
| 634 | .long sys_uselib | |
| 635 | .long sys_swapon | |
| 636 | .long sys_reboot | |
| e55380ed | 637 | .long sys_old_readdir |
| a4679373 | 638 | .long sys_old_mmap /* 90 */ |
| 51533b61 MS |
639 | .long sys_munmap |
| 640 | .long sys_truncate | |
| 641 | .long sys_ftruncate | |
| 642 | .long sys_fchmod | |
| 643 | .long sys_fchown16 /* 95 */ | |
| 644 | .long sys_getpriority | |
| 645 | .long sys_setpriority | |
| 646 | .long sys_ni_syscall /* old profil syscall holder */ | |
| 647 | .long sys_statfs | |
| 648 | .long sys_fstatfs /* 100 */ | |
| 649 | .long sys_ni_syscall /* sys_ioperm in i386 */ | |
| 650 | .long sys_socketcall | |
| 651 | .long sys_syslog | |
| 652 | .long sys_setitimer | |
| 653 | .long sys_getitimer /* 105 */ | |
| 654 | .long sys_newstat | |
| 655 | .long sys_newlstat | |
| 656 | .long sys_newfstat | |
| 657 | .long sys_ni_syscall /* old sys_uname holder */ | |
| 658 | .long sys_ni_syscall /* sys_iopl in i386 */ | |
| 659 | .long sys_vhangup | |
| 660 | .long sys_ni_syscall /* old "idle" system call */ | |
| 661 | .long sys_ni_syscall /* vm86old in i386 */ | |
| 662 | .long sys_wait4 | |
| 663 | .long sys_swapoff /* 115 */ | |
| 664 | .long sys_sysinfo | |
| 665 | .long sys_ipc | |
| 666 | .long sys_fsync | |
| 667 | .long sys_sigreturn | |
| 668 | .long sys_clone /* 120 */ | |
| 669 | .long sys_setdomainname | |
| 670 | .long sys_newuname | |
| 671 | .long sys_ni_syscall /* sys_modify_ldt */ | |
| 672 | .long sys_adjtimex | |
| 673 | .long sys_mprotect /* 125 */ | |
| 674 | .long sys_sigprocmask | |
| 675 | .long sys_ni_syscall /* old "create_module" */ | |
| 676 | .long sys_init_module | |
| 677 | .long sys_delete_module | |
| 678 | .long sys_ni_syscall /* 130: old "get_kernel_syms" */ | |
| 679 | .long sys_quotactl | |
| 680 | .long sys_getpgid | |
| 681 | .long sys_fchdir | |
| 682 | .long sys_bdflush | |
| 683 | .long sys_sysfs /* 135 */ | |
| 684 | .long sys_personality | |
| 685 | .long sys_ni_syscall /* for afs_syscall */ | |
| 686 | .long sys_setfsuid16 | |
| 687 | .long sys_setfsgid16 | |
| 688 | .long sys_llseek /* 140 */ | |
| 689 | .long sys_getdents | |
| 690 | .long sys_select | |
| 691 | .long sys_flock | |
| 692 | .long sys_msync | |
| 693 | .long sys_readv /* 145 */ | |
| 694 | .long sys_writev | |
| 695 | .long sys_getsid | |
| 696 | .long sys_fdatasync | |
| 697 | .long sys_sysctl | |
| 698 | .long sys_mlock /* 150 */ | |
| 699 | .long sys_munlock | |
| 700 | .long sys_mlockall | |
| 701 | .long sys_munlockall | |
| 702 | .long sys_sched_setparam | |
| 703 | .long sys_sched_getparam /* 155 */ | |
| 704 | .long sys_sched_setscheduler | |
| 705 | .long sys_sched_getscheduler | |
| 706 | .long sys_sched_yield | |
| 707 | .long sys_sched_get_priority_max | |
| 708 | .long sys_sched_get_priority_min /* 160 */ | |
| 709 | .long sys_sched_rr_get_interval | |
| 710 | .long sys_nanosleep | |
| 711 | .long sys_mremap | |
| 712 | .long sys_setresuid16 | |
| 713 | .long sys_getresuid16 /* 165 */ | |
| 714 | .long sys_ni_syscall /* sys_vm86 */ | |
| 715 | .long sys_ni_syscall /* Old sys_query_module */ | |
| 716 | .long sys_poll | |
| 717 | .long sys_nfsservctl | |
| 718 | .long sys_setresgid16 /* 170 */ | |
| 719 | .long sys_getresgid16 | |
| 720 | .long sys_prctl | |
| 721 | .long sys_rt_sigreturn | |
| 722 | .long sys_rt_sigaction | |
| 723 | .long sys_rt_sigprocmask /* 175 */ | |
| 724 | .long sys_rt_sigpending | |
| 725 | .long sys_rt_sigtimedwait | |
| 726 | .long sys_rt_sigqueueinfo | |
| 727 | .long sys_rt_sigsuspend | |
| 728 | .long sys_pread64 /* 180 */ | |
| 729 | .long sys_pwrite64 | |
| 730 | .long sys_chown16 | |
| 731 | .long sys_getcwd | |
| 732 | .long sys_capget | |
| 733 | .long sys_capset /* 185 */ | |
| 734 | .long sys_sigaltstack | |
| 735 | .long sys_sendfile | |
| 736 | .long sys_ni_syscall /* streams1 */ | |
| 737 | .long sys_ni_syscall /* streams2 */ | |
| 738 | .long sys_vfork /* 190 */ | |
| 739 | .long sys_getrlimit | |
| 740 | .long sys_mmap2 | |
| 741 | .long sys_truncate64 | |
| 742 | .long sys_ftruncate64 | |
| 743 | .long sys_stat64 /* 195 */ | |
| 744 | .long sys_lstat64 | |
| 745 | .long sys_fstat64 | |
| 746 | .long sys_lchown | |
| 747 | .long sys_getuid | |
| 748 | .long sys_getgid /* 200 */ | |
| 749 | .long sys_geteuid | |
| 750 | .long sys_getegid | |
| 751 | .long sys_setreuid | |
| 752 | .long sys_setregid | |
| 753 | .long sys_getgroups /* 205 */ | |
| 754 | .long sys_setgroups | |
| 755 | .long sys_fchown | |
| 756 | .long sys_setresuid | |
| 757 | .long sys_getresuid | |
| 758 | .long sys_setresgid /* 210 */ | |
| 759 | .long sys_getresgid | |
| 760 | .long sys_chown | |
| 761 | .long sys_setuid | |
| 762 | .long sys_setgid | |
| 763 | .long sys_setfsuid /* 215 */ | |
| 764 | .long sys_setfsgid | |
| 765 | .long sys_pivot_root | |
| 766 | .long sys_mincore | |
| 767 | .long sys_madvise | |
| 768 | .long sys_getdents64 /* 220 */ | |
| 769 | .long sys_fcntl64 | |
| 770 | .long sys_ni_syscall /* reserved for TUX */ | |
| 771 | .long sys_ni_syscall | |
| 772 | .long sys_gettid | |
| 773 | .long sys_readahead /* 225 */ | |
| 774 | .long sys_setxattr | |
| 775 | .long sys_lsetxattr | |
| 776 | .long sys_fsetxattr | |
| 777 | .long sys_getxattr | |
| 778 | .long sys_lgetxattr /* 230 */ | |
| 779 | .long sys_fgetxattr | |
| 780 | .long sys_listxattr | |
| 781 | .long sys_llistxattr | |
| 782 | .long sys_flistxattr | |
| 783 | .long sys_removexattr /* 235 */ | |
| 784 | .long sys_lremovexattr | |
| 785 | .long sys_fremovexattr | |
| 786 | .long sys_tkill | |
| 787 | .long sys_sendfile64 | |
| 788 | .long sys_futex /* 240 */ | |
| 789 | .long sys_sched_setaffinity | |
| 790 | .long sys_sched_getaffinity | |
| 791 | .long sys_ni_syscall /* sys_set_thread_area */ | |
| 792 | .long sys_ni_syscall /* sys_get_thread_area */ | |
| 793 | .long sys_io_setup /* 245 */ | |
| 794 | .long sys_io_destroy | |
| 795 | .long sys_io_getevents | |
| 796 | .long sys_io_submit | |
| 797 | .long sys_io_cancel | |
| 798 | .long sys_fadvise64 /* 250 */ | |
| 799 | .long sys_ni_syscall | |
| 800 | .long sys_exit_group | |
| 801 | .long sys_lookup_dcookie | |
| 802 | .long sys_epoll_create | |
| 803 | .long sys_epoll_ctl /* 255 */ | |
| 804 | .long sys_epoll_wait | |
| 805 | .long sys_remap_file_pages | |
| ffc8b00d JN |
806 | .long sys_set_tid_address |
| 807 | .long sys_timer_create | |
| 808 | .long sys_timer_settime /* 260 */ | |
| 809 | .long sys_timer_gettime | |
| 810 | .long sys_timer_getoverrun | |
| 811 | .long sys_timer_delete | |
| 812 | .long sys_clock_settime | |
| 813 | .long sys_clock_gettime /* 265 */ | |
| 814 | .long sys_clock_getres | |
| 815 | .long sys_clock_nanosleep | |
| 51533b61 MS |
816 | .long sys_statfs64 |
| 817 | .long sys_fstatfs64 | |
| 818 | .long sys_tgkill /* 270 */ | |
| 819 | .long sys_utimes | |
| ffc8b00d | 820 | .long sys_fadvise64_64 |
| 51533b61 MS |
821 | .long sys_ni_syscall /* sys_vserver */ |
| 822 | .long sys_ni_syscall /* sys_mbind */ | |
| 823 | .long sys_ni_syscall /* 275 sys_get_mempolicy */ | |
| 824 | .long sys_ni_syscall /* sys_set_mempolicy */ | |
| 825 | .long sys_mq_open | |
| 826 | .long sys_mq_unlink | |
| 827 | .long sys_mq_timedsend | |
| 828 | .long sys_mq_timedreceive /* 280 */ | |
| 829 | .long sys_mq_notify | |
| 830 | .long sys_mq_getsetattr | |
| 831 | .long sys_ni_syscall /* reserved for kexec */ | |
| 832 | .long sys_waitid | |
| ffc8b00d JN |
833 | .long sys_ni_syscall /* 285 */ /* available */ |
| 834 | .long sys_add_key | |
| 835 | .long sys_request_key | |
| 836 | .long sys_keyctl | |
| 837 | .long sys_ioprio_set | |
| 838 | .long sys_ioprio_get /* 290 */ | |
| 839 | .long sys_inotify_init | |
| 840 | .long sys_inotify_add_watch | |
| 841 | .long sys_inotify_rm_watch | |
| 842 | .long sys_migrate_pages | |
| 843 | .long sys_openat /* 295 */ | |
| 844 | .long sys_mkdirat | |
| 845 | .long sys_mknodat | |
| 846 | .long sys_fchownat | |
| 847 | .long sys_futimesat | |
| 848 | .long sys_fstatat64 /* 300 */ | |
| 849 | .long sys_unlinkat | |
| 850 | .long sys_renameat | |
| 851 | .long sys_linkat | |
| 852 | .long sys_symlinkat | |
| 853 | .long sys_readlinkat /* 305 */ | |
| 854 | .long sys_fchmodat | |
| 855 | .long sys_faccessat | |
| 856 | .long sys_pselect6 | |
| 857 | .long sys_ppoll | |
| 858 | .long sys_unshare /* 310 */ | |
| 859 | .long sys_set_robust_list | |
| 860 | .long sys_get_robust_list | |
| 861 | .long sys_splice | |
| 862 | .long sys_sync_file_range | |
| 863 | .long sys_tee /* 315 */ | |
| 864 | .long sys_vmsplice | |
| 865 | .long sys_move_pages | |
| 866 | .long sys_getcpu | |
| 867 | .long sys_epoll_pwait | |
| 868 | .long sys_utimensat /* 320 */ | |
| 869 | .long sys_signalfd | |
| 7800029d | 870 | .long sys_timerfd_create |
| ffc8b00d JN |
871 | .long sys_eventfd |
| 872 | .long sys_fallocate | |
| 7800029d JN |
873 | .long sys_timerfd_settime /* 325 */ |
| 874 | .long sys_timerfd_gettime | |
| 6d3d4be4 JN |
875 | .long sys_signalfd4 |
| 876 | .long sys_eventfd2 | |
| 877 | .long sys_epoll_create1 | |
| 878 | .long sys_dup3 /* 330 */ | |
| 879 | .long sys_pipe2 | |
| 880 | .long sys_inotify_init1 | |
| 881 | .long sys_preadv | |
| 882 | .long sys_pwritev | |
| 51533b61 MS |
883 | |
| 884 | /* | |
| 885 | * NOTE!! This doesn't have to be exact - we just have | |
| 886 | * to make sure we have _enough_ of the "sys_ni_syscall" | |
| 887 | * entries. Don't panic if you notice that this hasn't | |
| 888 | * been shrunk every time we add a new system call. | |
| 889 | */ | |
| 890 | ||
| 891 | .rept NR_syscalls - (.-sys_call_table) / 4 | |
| 892 | .long sys_ni_syscall | |
| 893 | .endr | |
| 894 |