]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/kernel/entry-common.S | |
3 | * | |
4 | * Copyright (C) 2000 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
1da177e4 | 10 | |
1da177e4 | 11 | #include <asm/unistd.h> |
395a59d0 | 12 | #include <asm/ftrace.h> |
a09e64fb | 13 | #include <mach/entry-macro.S> |
c4c5716e | 14 | #include <asm/unwind.h> |
1da177e4 LT |
15 | |
16 | #include "entry-header.S" | |
17 | ||
1da177e4 LT |
18 | |
19 | .align 5 | |
20 | /* | |
21 | * This is the fast syscall return path. We do as little as | |
22 | * possible here, and this includes saving r0 back into the SVC | |
23 | * stack. | |
24 | */ | |
25 | ret_fast_syscall: | |
c4c5716e CM |
26 | UNWIND(.fnstart ) |
27 | UNWIND(.cantunwind ) | |
1ec42c0c | 28 | disable_irq @ disable interrupts |
1da177e4 LT |
29 | ldr r1, [tsk, #TI_FLAGS] |
30 | tst r1, #_TIF_WORK_MASK | |
31 | bne fast_work_pending | |
d13e5edd TAP |
32 | #if defined(CONFIG_IRQSOFF_TRACER) |
33 | asm_trace_hardirqs_on | |
34 | #endif | |
f4dc9a4c | 35 | |
f80dff9d DW |
36 | /* perform architecture specific actions before user return */ |
37 | arch_ret_to_user r1, lr | |
38 | ||
b86040a5 | 39 | restore_user_regs fast = 1, offset = S_OFF |
c4c5716e | 40 | UNWIND(.fnend ) |
1da177e4 LT |
41 | |
42 | /* | |
43 | * Ok, we need to do extra processing, enter the slow path. | |
44 | */ | |
45 | fast_work_pending: | |
46 | str r0, [sp, #S_R0+S_OFF]! @ returned r0 | |
47 | work_pending: | |
48 | tst r1, #_TIF_NEED_RESCHED | |
49 | bne work_resched | |
d0420c83 | 50 | tst r1, #_TIF_SIGPENDING|_TIF_NOTIFY_RESUME |
1da177e4 LT |
51 | beq no_work_pending |
52 | mov r0, sp @ 'regs' | |
53 | mov r2, why @ 'syscall' | |
b2b163bb RK |
54 | tst r1, #_TIF_SIGPENDING @ delivering a signal? |
55 | movne why, #0 @ prevent further restarts | |
1da177e4 | 56 | bl do_notify_resume |
a6c61e9d | 57 | b ret_slow_syscall @ Check work again |
1da177e4 LT |
58 | |
59 | work_resched: | |
60 | bl schedule | |
61 | /* | |
62 | * "slow" syscall return path. "why" tells us if this was a real syscall. | |
63 | */ | |
64 | ENTRY(ret_to_user) | |
65 | ret_slow_syscall: | |
1ec42c0c | 66 | disable_irq @ disable interrupts |
1da177e4 LT |
67 | ldr r1, [tsk, #TI_FLAGS] |
68 | tst r1, #_TIF_WORK_MASK | |
69 | bne work_pending | |
70 | no_work_pending: | |
d13e5edd TAP |
71 | #if defined(CONFIG_IRQSOFF_TRACER) |
72 | asm_trace_hardirqs_on | |
73 | #endif | |
f80dff9d DW |
74 | /* perform architecture specific actions before user return */ |
75 | arch_ret_to_user r1, lr | |
76 | ||
b86040a5 | 77 | restore_user_regs fast = 0, offset = 0 |
93ed3970 | 78 | ENDPROC(ret_to_user) |
1da177e4 LT |
79 | |
80 | /* | |
81 | * This is how we return from a fork. | |
82 | */ | |
83 | ENTRY(ret_from_fork) | |
84 | bl schedule_tail | |
85 | get_thread_info tsk | |
86 | ldr r1, [tsk, #TI_FLAGS] @ check for syscall tracing | |
87 | mov why, #1 | |
88 | tst r1, #_TIF_SYSCALL_TRACE @ are we tracing syscalls? | |
89 | beq ret_slow_syscall | |
90 | mov r1, sp | |
91 | mov r0, #1 @ trace exit [IP = 1] | |
92 | bl syscall_trace | |
93 | b ret_slow_syscall | |
93ed3970 | 94 | ENDPROC(ret_from_fork) |
1da177e4 | 95 | |
fa1b4f91 AV |
96 | .equ NR_syscalls,0 |
97 | #define CALL(x) .equ NR_syscalls,NR_syscalls+1 | |
1da177e4 | 98 | #include "calls.S" |
fa1b4f91 AV |
99 | #undef CALL |
100 | #define CALL(x) .long x | |
1da177e4 | 101 | |
606576ce | 102 | #ifdef CONFIG_FUNCTION_TRACER |
686ff228 RV |
103 | /* |
104 | * When compiling with -pg, gcc inserts a call to the mcount routine at the | |
105 | * start of every function. In mcount, apart from the function's address (in | |
106 | * lr), we need to get hold of the function's caller's address. | |
107 | * | |
108 | * Older GCCs (pre-4.4) inserted a call to a routine called mcount like this: | |
109 | * | |
110 | * bl mcount | |
111 | * | |
112 | * These versions have the limitation that in order for the mcount routine to | |
113 | * be able to determine the function's caller's address, an APCS-style frame | |
114 | * pointer (which is set up with something like the code below) is required. | |
115 | * | |
116 | * mov ip, sp | |
117 | * push {fp, ip, lr, pc} | |
118 | * sub fp, ip, #4 | |
119 | * | |
120 | * With EABI, these frame pointers are not available unless -mapcs-frame is | |
121 | * specified, and if building as Thumb-2, not even then. | |
122 | * | |
123 | * Newer GCCs (4.4+) solve this problem by introducing a new version of mcount, | |
124 | * with call sites like: | |
125 | * | |
126 | * push {lr} | |
127 | * bl __gnu_mcount_nc | |
128 | * | |
129 | * With these compilers, frame pointers are not necessary. | |
130 | * | |
131 | * mcount can be thought of as a function called in the middle of a subroutine | |
132 | * call. As such, it needs to be transparent for both the caller and the | |
133 | * callee: the original lr needs to be restored when leaving mcount, and no | |
134 | * registers should be clobbered. (In the __gnu_mcount_nc implementation, we | |
135 | * clobber the ip register. This is OK because the ARM calling convention | |
136 | * allows it to be clobbered in subroutines and doesn't use it to hold | |
137 | * parameters.) | |
3b6c223b RV |
138 | * |
139 | * When using dynamic ftrace, we patch out the mcount call by a "mov r0, r0" | |
140 | * for the mcount case, and a "pop {lr}" for the __gnu_mcount_nc case (see | |
141 | * arch/arm/kernel/ftrace.c). | |
686ff228 | 142 | */ |
09bfafac RV |
143 | |
144 | #ifndef CONFIG_OLD_MCOUNT | |
145 | #if (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 4)) | |
146 | #error Ftrace requires CONFIG_FRAME_POINTER=y with GCC older than 4.4.0. | |
147 | #endif | |
148 | #endif | |
149 | ||
014c257c | 150 | #ifdef CONFIG_DYNAMIC_FTRACE |
3b6c223b RV |
151 | ENTRY(__gnu_mcount_nc) |
152 | mov ip, lr | |
153 | ldmia sp!, {lr} | |
154 | mov pc, ip | |
155 | ENDPROC(__gnu_mcount_nc) | |
156 | ||
157 | ENTRY(ftrace_caller) | |
28e192d6 RV |
158 | stmdb sp!, {r0-r3, lr} |
159 | mov r0, lr | |
160 | sub r0, r0, #MCOUNT_INSN_SIZE | |
3b6c223b | 161 | ldr r1, [sp, #20] |
014c257c | 162 | |
3b6c223b RV |
163 | .global ftrace_call |
164 | ftrace_call: | |
28e192d6 | 165 | bl ftrace_stub |
3b6c223b RV |
166 | ldmia sp!, {r0-r3, ip, lr} |
167 | mov pc, ip | |
168 | ENDPROC(ftrace_caller) | |
014c257c | 169 | |
3b6c223b RV |
170 | #ifdef CONFIG_OLD_MCOUNT |
171 | ENTRY(mcount) | |
172 | stmdb sp!, {lr} | |
173 | ldr lr, [fp, #-4] | |
174 | ldmia sp!, {pc} | |
72fa62fa | 175 | ENDPROC(mcount) |
014c257c | 176 | |
3b6c223b | 177 | ENTRY(ftrace_caller_old) |
28e192d6 RV |
178 | stmdb sp!, {r0-r3, lr} |
179 | ldr r1, [fp, #-4] | |
180 | mov r0, lr | |
181 | sub r0, r0, #MCOUNT_INSN_SIZE | |
014c257c | 182 | |
3b6c223b RV |
183 | .globl ftrace_call_old |
184 | ftrace_call_old: | |
28e192d6 RV |
185 | bl ftrace_stub |
186 | ldr lr, [fp, #-4] @ restore lr | |
187 | ldmia sp!, {r0-r3, pc} | |
3b6c223b RV |
188 | ENDPROC(ftrace_caller_old) |
189 | #endif | |
014c257c AS |
190 | |
191 | #else | |
192 | ||
181f817e | 193 | ENTRY(__gnu_mcount_nc) |
28e192d6 RV |
194 | stmdb sp!, {r0-r3, lr} |
195 | ldr r0, =ftrace_trace_function | |
196 | ldr r2, [r0] | |
a3ba87a6 | 197 | adr r0, .Lftrace_stub |
28e192d6 RV |
198 | cmp r0, r2 |
199 | bne gnu_trace | |
200 | ldmia sp!, {r0-r3, ip, lr} | |
201 | mov pc, ip | |
181f817e UKK |
202 | |
203 | gnu_trace: | |
28e192d6 RV |
204 | ldr r1, [sp, #20] @ lr of instrumented routine |
205 | mov r0, lr | |
206 | sub r0, r0, #MCOUNT_INSN_SIZE | |
a3ba87a6 | 207 | adr lr, BSYM(1f) |
28e192d6 | 208 | mov pc, r2 |
a3ba87a6 | 209 | 1: |
28e192d6 RV |
210 | ldmia sp!, {r0-r3, ip, lr} |
211 | mov pc, ip | |
72fa62fa | 212 | ENDPROC(__gnu_mcount_nc) |
181f817e | 213 | |
09bfafac RV |
214 | #ifdef CONFIG_OLD_MCOUNT |
215 | /* | |
216 | * This is under an ifdef in order to force link-time errors for people trying | |
217 | * to build with !FRAME_POINTER with a GCC which doesn't use the new-style | |
218 | * mcount. | |
219 | */ | |
014c257c | 220 | ENTRY(mcount) |
28e192d6 RV |
221 | stmdb sp!, {r0-r3, lr} |
222 | ldr r0, =ftrace_trace_function | |
223 | ldr r2, [r0] | |
224 | adr r0, ftrace_stub | |
225 | cmp r0, r2 | |
226 | bne trace | |
227 | ldr lr, [fp, #-4] @ restore lr | |
228 | ldmia sp!, {r0-r3, pc} | |
014c257c AS |
229 | |
230 | trace: | |
28e192d6 RV |
231 | ldr r1, [fp, #-4] @ lr of instrumented routine |
232 | mov r0, lr | |
233 | sub r0, r0, #MCOUNT_INSN_SIZE | |
234 | mov lr, pc | |
235 | mov pc, r2 | |
236 | ldr lr, [fp, #-4] @ restore lr | |
237 | ldmia sp!, {r0-r3, pc} | |
72fa62fa | 238 | ENDPROC(mcount) |
09bfafac | 239 | #endif |
014c257c AS |
240 | |
241 | #endif /* CONFIG_DYNAMIC_FTRACE */ | |
242 | ||
72fa62fa | 243 | ENTRY(ftrace_stub) |
a3ba87a6 | 244 | .Lftrace_stub: |
28e192d6 | 245 | mov pc, lr |
72fa62fa | 246 | ENDPROC(ftrace_stub) |
014c257c | 247 | |
606576ce | 248 | #endif /* CONFIG_FUNCTION_TRACER */ |
014c257c | 249 | |
1da177e4 LT |
250 | /*============================================================================= |
251 | * SWI handler | |
252 | *----------------------------------------------------------------------------- | |
253 | */ | |
254 | ||
255 | /* If we're optimising for StrongARM the resulting code won't | |
256 | run on an ARM7 and we can save a couple of instructions. | |
257 | --pb */ | |
258 | #ifdef CONFIG_CPU_ARM710 | |
3f2829a3 NP |
259 | #define A710(code...) code |
260 | .Larm710bug: | |
1da177e4 LT |
261 | ldmia sp, {r0 - lr}^ @ Get calling r0 - lr |
262 | mov r0, r0 | |
1da177e4 | 263 | add sp, sp, #S_FRAME_SIZE |
60ac133a | 264 | subs pc, lr, #4 |
1da177e4 | 265 | #else |
3f2829a3 | 266 | #define A710(code...) |
1da177e4 LT |
267 | #endif |
268 | ||
269 | .align 5 | |
270 | ENTRY(vector_swi) | |
f4dc9a4c RK |
271 | sub sp, sp, #S_FRAME_SIZE |
272 | stmia sp, {r0 - r12} @ Calling r0 - r12 | |
b86040a5 CM |
273 | ARM( add r8, sp, #S_PC ) |
274 | ARM( stmdb r8, {sp, lr}^ ) @ Calling sp, lr | |
275 | THUMB( mov r8, sp ) | |
276 | THUMB( store_user_sp_lr r8, r10, S_SP ) @ calling sp, lr | |
f4dc9a4c RK |
277 | mrs r8, spsr @ called from non-FIQ mode, so ok. |
278 | str lr, [sp, #S_PC] @ Save calling PC | |
279 | str r8, [sp, #S_PSR] @ Save CPSR | |
280 | str r0, [sp, #S_OLD_R0] @ Save OLD_R0 | |
1da177e4 | 281 | zero_fp |
e0f9f4a6 RK |
282 | |
283 | /* | |
284 | * Get the system call number. | |
285 | */ | |
3f2829a3 | 286 | |
dd35afc2 | 287 | #if defined(CONFIG_OABI_COMPAT) |
3f2829a3 | 288 | |
dd35afc2 NP |
289 | /* |
290 | * If we have CONFIG_OABI_COMPAT then we need to look at the swi | |
291 | * value to determine if it is an EABI or an old ABI call. | |
292 | */ | |
293 | #ifdef CONFIG_ARM_THUMB | |
294 | tst r8, #PSR_T_BIT | |
295 | movne r10, #0 @ no thumb OABI emulation | |
296 | ldreq r10, [lr, #-4] @ get SWI instruction | |
297 | #else | |
298 | ldr r10, [lr, #-4] @ get SWI instruction | |
299 | A710( and ip, r10, #0x0f000000 @ check for SWI ) | |
300 | A710( teq ip, #0x0f000000 ) | |
301 | A710( bne .Larm710bug ) | |
302 | #endif | |
26584853 CM |
303 | #ifdef CONFIG_CPU_ENDIAN_BE8 |
304 | rev r10, r10 @ little endian instruction | |
305 | #endif | |
dd35afc2 NP |
306 | |
307 | #elif defined(CONFIG_AEABI) | |
308 | ||
309 | /* | |
310 | * Pure EABI user space always put syscall number into scno (r7). | |
311 | */ | |
3f2829a3 NP |
312 | A710( ldr ip, [lr, #-4] @ get SWI instruction ) |
313 | A710( and ip, ip, #0x0f000000 @ check for SWI ) | |
314 | A710( teq ip, #0x0f000000 ) | |
315 | A710( bne .Larm710bug ) | |
dd35afc2 | 316 | |
3f2829a3 | 317 | #elif defined(CONFIG_ARM_THUMB) |
dd35afc2 NP |
318 | |
319 | /* Legacy ABI only, possibly thumb mode. */ | |
e0f9f4a6 RK |
320 | tst r8, #PSR_T_BIT @ this is SPSR from save_user_regs |
321 | addne scno, r7, #__NR_SYSCALL_BASE @ put OS number in | |
322 | ldreq scno, [lr, #-4] | |
dd35afc2 | 323 | |
e0f9f4a6 | 324 | #else |
dd35afc2 NP |
325 | |
326 | /* Legacy ABI only. */ | |
e0f9f4a6 | 327 | ldr scno, [lr, #-4] @ get SWI instruction |
3f2829a3 NP |
328 | A710( and ip, scno, #0x0f000000 @ check for SWI ) |
329 | A710( teq ip, #0x0f000000 ) | |
330 | A710( bne .Larm710bug ) | |
dd35afc2 | 331 | |
e0f9f4a6 | 332 | #endif |
1da177e4 LT |
333 | |
334 | #ifdef CONFIG_ALIGNMENT_TRAP | |
335 | ldr ip, __cr_alignment | |
336 | ldr ip, [ip] | |
337 | mcr p15, 0, ip, c1, c0 @ update control register | |
338 | #endif | |
1ec42c0c | 339 | enable_irq |
1da177e4 | 340 | |
1da177e4 | 341 | get_thread_info tsk |
dd35afc2 | 342 | adr tbl, sys_call_table @ load syscall table pointer |
dd35afc2 NP |
343 | |
344 | #if defined(CONFIG_OABI_COMPAT) | |
345 | /* | |
346 | * If the swi argument is zero, this is an EABI call and we do nothing. | |
347 | * | |
348 | * If this is an old ABI call, get the syscall number into scno and | |
349 | * get the old ABI syscall table address. | |
350 | */ | |
351 | bics r10, r10, #0xff000000 | |
352 | eorne scno, r10, #__NR_OABI_SYSCALL_BASE | |
353 | ldrne tbl, =sys_oabi_call_table | |
354 | #elif !defined(CONFIG_AEABI) | |
1da177e4 | 355 | bic scno, scno, #0xff000000 @ mask off SWI op-code |
e0f9f4a6 | 356 | eor scno, scno, #__NR_SYSCALL_BASE @ check OS number |
3f2829a3 | 357 | #endif |
dd35afc2 | 358 | |
70c70d97 | 359 | ldr r10, [tsk, #TI_FLAGS] @ check for syscall tracing |
3f2829a3 | 360 | stmdb sp!, {r4, r5} @ push fifth and sixth args |
70c70d97 NP |
361 | |
362 | #ifdef CONFIG_SECCOMP | |
363 | tst r10, #_TIF_SECCOMP | |
364 | beq 1f | |
365 | mov r0, scno | |
366 | bl __secure_computing | |
367 | add r0, sp, #S_R0 + S_OFF @ pointer to regs | |
368 | ldmia r0, {r0 - r3} @ have to reload r0 - r3 | |
369 | 1: | |
370 | #endif | |
371 | ||
372 | tst r10, #_TIF_SYSCALL_TRACE @ are we tracing syscalls? | |
1da177e4 LT |
373 | bne __sys_trace |
374 | ||
1da177e4 | 375 | cmp scno, #NR_syscalls @ check upper syscall limit |
b86040a5 | 376 | adr lr, BSYM(ret_fast_syscall) @ return address |
1da177e4 LT |
377 | ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine |
378 | ||
379 | add r1, sp, #S_OFF | |
380 | 2: mov why, #0 @ no longer a real syscall | |
e0f9f4a6 RK |
381 | cmp scno, #(__ARM_NR_BASE - __NR_SYSCALL_BASE) |
382 | eor r0, scno, #__NR_SYSCALL_BASE @ put OS number back | |
1da177e4 LT |
383 | bcs arm_syscall |
384 | b sys_ni_syscall @ not private func | |
93ed3970 | 385 | ENDPROC(vector_swi) |
1da177e4 LT |
386 | |
387 | /* | |
388 | * This is the really slow path. We're going to be doing | |
389 | * context switches, and waiting for our parent to respond. | |
390 | */ | |
391 | __sys_trace: | |
3f471126 | 392 | mov r2, scno |
1da177e4 LT |
393 | add r1, sp, #S_OFF |
394 | mov r0, #0 @ trace entry [IP = 0] | |
395 | bl syscall_trace | |
396 | ||
b86040a5 | 397 | adr lr, BSYM(__sys_trace_return) @ return address |
3f471126 | 398 | mov scno, r0 @ syscall number (possibly new) |
1da177e4 LT |
399 | add r1, sp, #S_R0 + S_OFF @ pointer to regs |
400 | cmp scno, #NR_syscalls @ check upper syscall limit | |
401 | ldmccia r1, {r0 - r3} @ have to reload r0 - r3 | |
402 | ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine | |
403 | b 2b | |
404 | ||
405 | __sys_trace_return: | |
406 | str r0, [sp, #S_R0 + S_OFF]! @ save returned r0 | |
3f471126 | 407 | mov r2, scno |
1da177e4 LT |
408 | mov r1, sp |
409 | mov r0, #1 @ trace exit [IP = 1] | |
410 | bl syscall_trace | |
411 | b ret_slow_syscall | |
412 | ||
413 | .align 5 | |
414 | #ifdef CONFIG_ALIGNMENT_TRAP | |
415 | .type __cr_alignment, #object | |
416 | __cr_alignment: | |
417 | .word cr_alignment | |
dd35afc2 NP |
418 | #endif |
419 | .ltorg | |
420 | ||
421 | /* | |
422 | * This is the syscall table declaration for native ABI syscalls. | |
423 | * With EABI a couple syscalls are obsolete and defined as sys_ni_syscall. | |
424 | */ | |
425 | #define ABI(native, compat) native | |
426 | #ifdef CONFIG_AEABI | |
427 | #define OBSOLETE(syscall) sys_ni_syscall | |
428 | #else | |
429 | #define OBSOLETE(syscall) syscall | |
1da177e4 LT |
430 | #endif |
431 | ||
432 | .type sys_call_table, #object | |
433 | ENTRY(sys_call_table) | |
434 | #include "calls.S" | |
dd35afc2 NP |
435 | #undef ABI |
436 | #undef OBSOLETE | |
1da177e4 LT |
437 | |
438 | /*============================================================================ | |
439 | * Special system call wrappers | |
440 | */ | |
441 | @ r0 = syscall number | |
567bd980 | 442 | @ r8 = syscall table |
1da177e4 | 443 | sys_syscall: |
5247593c | 444 | bic scno, r0, #__NR_OABI_SYSCALL_BASE |
1da177e4 LT |
445 | cmp scno, #__NR_syscall - __NR_SYSCALL_BASE |
446 | cmpne scno, #NR_syscalls @ check range | |
447 | stmloia sp, {r5, r6} @ shuffle args | |
448 | movlo r0, r1 | |
449 | movlo r1, r2 | |
450 | movlo r2, r3 | |
451 | movlo r3, r4 | |
452 | ldrlo pc, [tbl, scno, lsl #2] | |
453 | b sys_ni_syscall | |
93ed3970 | 454 | ENDPROC(sys_syscall) |
1da177e4 LT |
455 | |
456 | sys_fork_wrapper: | |
457 | add r0, sp, #S_OFF | |
458 | b sys_fork | |
93ed3970 | 459 | ENDPROC(sys_fork_wrapper) |
1da177e4 LT |
460 | |
461 | sys_vfork_wrapper: | |
462 | add r0, sp, #S_OFF | |
463 | b sys_vfork | |
93ed3970 | 464 | ENDPROC(sys_vfork_wrapper) |
1da177e4 LT |
465 | |
466 | sys_execve_wrapper: | |
467 | add r3, sp, #S_OFF | |
468 | b sys_execve | |
93ed3970 | 469 | ENDPROC(sys_execve_wrapper) |
1da177e4 LT |
470 | |
471 | sys_clone_wrapper: | |
472 | add ip, sp, #S_OFF | |
473 | str ip, [sp, #4] | |
474 | b sys_clone | |
93ed3970 | 475 | ENDPROC(sys_clone_wrapper) |
1da177e4 | 476 | |
1da177e4 LT |
477 | sys_sigreturn_wrapper: |
478 | add r0, sp, #S_OFF | |
653d48b2 | 479 | mov why, #0 @ prevent syscall restart handling |
1da177e4 | 480 | b sys_sigreturn |
93ed3970 | 481 | ENDPROC(sys_sigreturn_wrapper) |
1da177e4 LT |
482 | |
483 | sys_rt_sigreturn_wrapper: | |
484 | add r0, sp, #S_OFF | |
653d48b2 | 485 | mov why, #0 @ prevent syscall restart handling |
1da177e4 | 486 | b sys_rt_sigreturn |
93ed3970 | 487 | ENDPROC(sys_rt_sigreturn_wrapper) |
1da177e4 LT |
488 | |
489 | sys_sigaltstack_wrapper: | |
490 | ldr r2, [sp, #S_OFF + S_SP] | |
491 | b do_sigaltstack | |
93ed3970 | 492 | ENDPROC(sys_sigaltstack_wrapper) |
1da177e4 | 493 | |
713c4815 NP |
494 | sys_statfs64_wrapper: |
495 | teq r1, #88 | |
496 | moveq r1, #84 | |
497 | b sys_statfs64 | |
93ed3970 | 498 | ENDPROC(sys_statfs64_wrapper) |
713c4815 NP |
499 | |
500 | sys_fstatfs64_wrapper: | |
501 | teq r1, #88 | |
502 | moveq r1, #84 | |
503 | b sys_fstatfs64 | |
93ed3970 | 504 | ENDPROC(sys_fstatfs64_wrapper) |
713c4815 | 505 | |
1da177e4 LT |
506 | /* |
507 | * Note: off_4k (r5) is always units of 4K. If we can't do the requested | |
508 | * offset, we return EINVAL. | |
509 | */ | |
510 | sys_mmap2: | |
511 | #if PAGE_SHIFT > 12 | |
512 | tst r5, #PGOFF_MASK | |
513 | moveq r5, r5, lsr #PAGE_SHIFT - 12 | |
514 | streq r5, [sp, #4] | |
f8b72560 | 515 | beq sys_mmap_pgoff |
1da177e4 | 516 | mov r0, #-EINVAL |
7999d8d7 | 517 | mov pc, lr |
1da177e4 LT |
518 | #else |
519 | str r5, [sp, #4] | |
f8b72560 | 520 | b sys_mmap_pgoff |
1da177e4 | 521 | #endif |
93ed3970 | 522 | ENDPROC(sys_mmap2) |
687ad019 NP |
523 | |
524 | #ifdef CONFIG_OABI_COMPAT | |
dd35afc2 | 525 | |
687ad019 NP |
526 | /* |
527 | * These are syscalls with argument register differences | |
528 | */ | |
529 | ||
530 | sys_oabi_pread64: | |
531 | stmia sp, {r3, r4} | |
532 | b sys_pread64 | |
93ed3970 | 533 | ENDPROC(sys_oabi_pread64) |
687ad019 NP |
534 | |
535 | sys_oabi_pwrite64: | |
536 | stmia sp, {r3, r4} | |
537 | b sys_pwrite64 | |
93ed3970 | 538 | ENDPROC(sys_oabi_pwrite64) |
687ad019 NP |
539 | |
540 | sys_oabi_truncate64: | |
541 | mov r3, r2 | |
542 | mov r2, r1 | |
543 | b sys_truncate64 | |
93ed3970 | 544 | ENDPROC(sys_oabi_truncate64) |
687ad019 NP |
545 | |
546 | sys_oabi_ftruncate64: | |
547 | mov r3, r2 | |
548 | mov r2, r1 | |
549 | b sys_ftruncate64 | |
93ed3970 | 550 | ENDPROC(sys_oabi_ftruncate64) |
687ad019 NP |
551 | |
552 | sys_oabi_readahead: | |
553 | str r3, [sp] | |
554 | mov r3, r2 | |
555 | mov r2, r1 | |
556 | b sys_readahead | |
93ed3970 | 557 | ENDPROC(sys_oabi_readahead) |
687ad019 | 558 | |
dd35afc2 NP |
559 | /* |
560 | * Let's declare a second syscall table for old ABI binaries | |
561 | * using the compatibility syscall entries. | |
562 | */ | |
563 | #define ABI(native, compat) compat | |
564 | #define OBSOLETE(syscall) syscall | |
565 | ||
566 | .type sys_oabi_call_table, #object | |
567 | ENTRY(sys_oabi_call_table) | |
568 | #include "calls.S" | |
569 | #undef ABI | |
570 | #undef OBSOLETE | |
571 | ||
687ad019 NP |
572 | #endif |
573 |