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1 | /* |
2 | * This file contains the light-weight system call handlers (fsyscall-handlers). |
3 | * |
4 | * Copyright (C) 2003 Hewlett-Packard Co |
5 | * David Mosberger-Tang <davidm@hpl.hp.com> |
6 | * |
7 | * 25-Sep-03 davidm Implement fsys_rt_sigprocmask(). |
8 | * 18-Feb-03 louisk Implement fsys_gettimeofday(). |
9 | * 28-Feb-03 davidm Fixed several bugs in fsys_gettimeofday(). Tuned it some more, |
10 | * probably broke it along the way... ;-) |
11 | * 13-Jul-04 clameter Implement fsys_clock_gettime and revise fsys_gettimeofday to make |
12 | * it capable of using memory based clocks without falling back to C code. |
13 | * 08-Feb-07 Fenghua Yu Implement fsys_getcpu. |
14 | * |
15 | */ |
16 | |
17 | #include <asm/asmmacro.h> |
18 | #include <asm/errno.h> |
19 | #include <asm/asm-offsets.h> |
20 | #include <asm/percpu.h> |
21 | #include <asm/thread_info.h> |
22 | #include <asm/sal.h> |
23 | #include <asm/signal.h> |
24 | #include <asm/system.h> |
25 | #include <asm/unistd.h> |
26 | |
27 | #include "entry.h" |
28 | #include "paravirt_inst.h" |
29 | |
30 | /* |
31 | * See Documentation/ia64/fsys.txt for details on fsyscalls. |
32 | * |
33 | * On entry to an fsyscall handler: |
34 | * r10 = 0 (i.e., defaults to "successful syscall return") |
35 | * r11 = saved ar.pfs (a user-level value) |
36 | * r15 = system call number |
37 | * r16 = "current" task pointer (in normal kernel-mode, this is in r13) |
38 | * r32-r39 = system call arguments |
39 | * b6 = return address (a user-level value) |
40 | * ar.pfs = previous frame-state (a user-level value) |
41 | * PSR.be = cleared to zero (i.e., little-endian byte order is in effect) |
42 | * all other registers may contain values passed in from user-mode |
43 | * |
44 | * On return from an fsyscall handler: |
45 | * r11 = saved ar.pfs (as passed into the fsyscall handler) |
46 | * r15 = system call number (as passed into the fsyscall handler) |
47 | * r32-r39 = system call arguments (as passed into the fsyscall handler) |
48 | * b6 = return address (as passed into the fsyscall handler) |
49 | * ar.pfs = previous frame-state (as passed into the fsyscall handler) |
50 | */ |
51 | |
52 | ENTRY(fsys_ni_syscall) |
53 | .prologue |
54 | .altrp b6 |
55 | .body |
56 | mov r8=ENOSYS |
57 | mov r10=-1 |
58 | FSYS_RETURN |
59 | END(fsys_ni_syscall) |
60 | |
61 | ENTRY(fsys_getpid) |
62 | .prologue |
63 | .altrp b6 |
64 | .body |
65 | add r17=IA64_TASK_GROUP_LEADER_OFFSET,r16 |
66 | ;; |
67 | ld8 r17=[r17] // r17 = current->group_leader |
68 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 |
69 | ;; |
70 | ld4 r9=[r9] |
71 | add r17=IA64_TASK_TGIDLINK_OFFSET,r17 |
72 | ;; |
73 | and r9=TIF_ALLWORK_MASK,r9 |
74 | ld8 r17=[r17] // r17 = current->group_leader->pids[PIDTYPE_PID].pid |
75 | ;; |
76 | add r8=IA64_PID_LEVEL_OFFSET,r17 |
77 | ;; |
78 | ld4 r8=[r8] // r8 = pid->level |
79 | add r17=IA64_PID_UPID_OFFSET,r17 // r17 = &pid->numbers[0] |
80 | ;; |
81 | shl r8=r8,IA64_UPID_SHIFT |
82 | ;; |
83 | add r17=r17,r8 // r17 = &pid->numbers[pid->level] |
84 | ;; |
85 | ld4 r8=[r17] // r8 = pid->numbers[pid->level].nr |
86 | ;; |
87 | mov r17=0 |
88 | ;; |
89 | cmp.ne p8,p0=0,r9 |
90 | (p8) br.spnt.many fsys_fallback_syscall |
91 | FSYS_RETURN |
92 | END(fsys_getpid) |
93 | |
94 | ENTRY(fsys_getppid) |
95 | .prologue |
96 | .altrp b6 |
97 | .body |
98 | add r17=IA64_TASK_GROUP_LEADER_OFFSET,r16 |
99 | ;; |
100 | ld8 r17=[r17] // r17 = current->group_leader |
101 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 |
102 | ;; |
103 | |
104 | ld4 r9=[r9] |
105 | add r17=IA64_TASK_REAL_PARENT_OFFSET,r17 // r17 = ¤t->group_leader->real_parent |
106 | ;; |
107 | and r9=TIF_ALLWORK_MASK,r9 |
108 | |
109 | 1: ld8 r18=[r17] // r18 = current->group_leader->real_parent |
110 | ;; |
111 | cmp.ne p8,p0=0,r9 |
112 | add r8=IA64_TASK_TGID_OFFSET,r18 // r8 = ¤t->group_leader->real_parent->tgid |
113 | ;; |
114 | |
115 | /* |
116 | * The .acq is needed to ensure that the read of tgid has returned its data before |
117 | * we re-check "real_parent". |
118 | */ |
119 | ld4.acq r8=[r8] // r8 = current->group_leader->real_parent->tgid |
120 | #ifdef CONFIG_SMP |
121 | /* |
122 | * Re-read current->group_leader->real_parent. |
123 | */ |
124 | ld8 r19=[r17] // r19 = current->group_leader->real_parent |
125 | (p8) br.spnt.many fsys_fallback_syscall |
126 | ;; |
127 | cmp.ne p6,p0=r18,r19 // did real_parent change? |
128 | mov r19=0 // i must not leak kernel bits... |
129 | (p6) br.cond.spnt.few 1b // yes -> redo the read of tgid and the check |
130 | ;; |
131 | mov r17=0 // i must not leak kernel bits... |
132 | mov r18=0 // i must not leak kernel bits... |
133 | #else |
134 | mov r17=0 // i must not leak kernel bits... |
135 | mov r18=0 // i must not leak kernel bits... |
136 | mov r19=0 // i must not leak kernel bits... |
137 | #endif |
138 | FSYS_RETURN |
139 | END(fsys_getppid) |
140 | |
141 | ENTRY(fsys_set_tid_address) |
142 | .prologue |
143 | .altrp b6 |
144 | .body |
145 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 |
146 | add r17=IA64_TASK_TGIDLINK_OFFSET,r16 |
147 | ;; |
148 | ld4 r9=[r9] |
149 | tnat.z p6,p7=r32 // check argument register for being NaT |
150 | ld8 r17=[r17] // r17 = current->pids[PIDTYPE_PID].pid |
151 | ;; |
152 | and r9=TIF_ALLWORK_MASK,r9 |
153 | add r8=IA64_PID_LEVEL_OFFSET,r17 |
154 | add r18=IA64_TASK_CLEAR_CHILD_TID_OFFSET,r16 |
155 | ;; |
156 | ld4 r8=[r8] // r8 = pid->level |
157 | add r17=IA64_PID_UPID_OFFSET,r17 // r17 = &pid->numbers[0] |
158 | ;; |
159 | shl r8=r8,IA64_UPID_SHIFT |
160 | ;; |
161 | add r17=r17,r8 // r17 = &pid->numbers[pid->level] |
162 | ;; |
163 | ld4 r8=[r17] // r8 = pid->numbers[pid->level].nr |
164 | ;; |
165 | cmp.ne p8,p0=0,r9 |
166 | mov r17=-1 |
167 | ;; |
168 | (p6) st8 [r18]=r32 |
169 | (p7) st8 [r18]=r17 |
170 | (p8) br.spnt.many fsys_fallback_syscall |
171 | ;; |
172 | mov r17=0 // i must not leak kernel bits... |
173 | mov r18=0 // i must not leak kernel bits... |
174 | FSYS_RETURN |
175 | END(fsys_set_tid_address) |
176 | |
177 | #if IA64_GTOD_LOCK_OFFSET !=0 |
178 | #error fsys_gettimeofday incompatible with changes to struct fsyscall_gtod_data_t |
179 | #endif |
180 | #if IA64_ITC_JITTER_OFFSET !=0 |
181 | #error fsys_gettimeofday incompatible with changes to struct itc_jitter_data_t |
182 | #endif |
183 | #define CLOCK_REALTIME 0 |
184 | #define CLOCK_MONOTONIC 1 |
185 | #define CLOCK_DIVIDE_BY_1000 0x4000 |
186 | #define CLOCK_ADD_MONOTONIC 0x8000 |
187 | |
188 | ENTRY(fsys_gettimeofday) |
189 | .prologue |
190 | .altrp b6 |
191 | .body |
192 | mov r31 = r32 |
193 | tnat.nz p6,p0 = r33 // guard against NaT argument |
194 | (p6) br.cond.spnt.few .fail_einval |
195 | mov r30 = CLOCK_DIVIDE_BY_1000 |
196 | ;; |
197 | .gettime: |
198 | // Register map |
199 | // Incoming r31 = pointer to address where to place result |
200 | // r30 = flags determining how time is processed |
201 | // r2,r3 = temp r4-r7 preserved |
202 | // r8 = result nanoseconds |
203 | // r9 = result seconds |
204 | // r10 = temporary storage for clock difference |
205 | // r11 = preserved: saved ar.pfs |
206 | // r12 = preserved: memory stack |
207 | // r13 = preserved: thread pointer |
208 | // r14 = address of mask / mask value |
209 | // r15 = preserved: system call number |
210 | // r16 = preserved: current task pointer |
211 | // r17 = (not used) |
212 | // r18 = (not used) |
213 | // r19 = address of itc_lastcycle |
214 | // r20 = struct fsyscall_gtod_data (= address of gtod_lock.sequence) |
215 | // r21 = address of mmio_ptr |
216 | // r22 = address of wall_time or monotonic_time |
217 | // r23 = address of shift / value |
218 | // r24 = address mult factor / cycle_last value |
219 | // r25 = itc_lastcycle value |
220 | // r26 = address clocksource cycle_last |
221 | // r27 = (not used) |
222 | // r28 = sequence number at the beginning of critcal section |
223 | // r29 = address of itc_jitter |
224 | // r30 = time processing flags / memory address |
225 | // r31 = pointer to result |
226 | // Predicates |
227 | // p6,p7 short term use |
228 | // p8 = timesource ar.itc |
229 | // p9 = timesource mmio64 |
230 | // p10 = timesource mmio32 - not used |
231 | // p11 = timesource not to be handled by asm code |
232 | // p12 = memory time source ( = p9 | p10) - not used |
233 | // p13 = do cmpxchg with itc_lastcycle |
234 | // p14 = Divide by 1000 |
235 | // p15 = Add monotonic |
236 | // |
237 | // Note that instructions are optimized for McKinley. McKinley can |
238 | // process two bundles simultaneously and therefore we continuously |
239 | // try to feed the CPU two bundles and then a stop. |
240 | |
241 | add r2 = TI_FLAGS+IA64_TASK_SIZE,r16 |
242 | tnat.nz p6,p0 = r31 // guard against Nat argument |
243 | (p6) br.cond.spnt.few .fail_einval |
244 | movl r20 = fsyscall_gtod_data // load fsyscall gettimeofday data address |
245 | ;; |
246 | ld4 r2 = [r2] // process work pending flags |
247 | movl r29 = itc_jitter_data // itc_jitter |
248 | add r22 = IA64_GTOD_WALL_TIME_OFFSET,r20 // wall_time |
249 | add r21 = IA64_CLKSRC_MMIO_OFFSET,r20 |
250 | mov pr = r30,0xc000 // Set predicates according to function |
251 | ;; |
252 | and r2 = TIF_ALLWORK_MASK,r2 |
253 | add r19 = IA64_ITC_LASTCYCLE_OFFSET,r29 |
254 | (p15) add r22 = IA64_GTOD_MONO_TIME_OFFSET,r20 // monotonic_time |
255 | ;; |
256 | add r26 = IA64_CLKSRC_CYCLE_LAST_OFFSET,r20 // clksrc_cycle_last |
257 | cmp.ne p6, p0 = 0, r2 // Fallback if work is scheduled |
258 | (p6) br.cond.spnt.many fsys_fallback_syscall |
259 | ;; |
260 | // Begin critical section |
261 | .time_redo: |
262 | ld4.acq r28 = [r20] // gtod_lock.sequence, Must take first |
263 | ;; |
264 | and r28 = ~1,r28 // And make sequence even to force retry if odd |
265 | ;; |
266 | ld8 r30 = [r21] // clocksource->mmio_ptr |
267 | add r24 = IA64_CLKSRC_MULT_OFFSET,r20 |
268 | ld4 r2 = [r29] // itc_jitter value |
269 | add r23 = IA64_CLKSRC_SHIFT_OFFSET,r20 |
270 | add r14 = IA64_CLKSRC_MASK_OFFSET,r20 |
271 | ;; |
272 | ld4 r3 = [r24] // clocksource mult value |
273 | ld8 r14 = [r14] // clocksource mask value |
274 | cmp.eq p8,p9 = 0,r30 // use cpu timer if no mmio_ptr |
275 | ;; |
276 | setf.sig f7 = r3 // Setup for mult scaling of counter |
277 | (p8) cmp.ne p13,p0 = r2,r0 // need itc_jitter compensation, set p13 |
278 | ld4 r23 = [r23] // clocksource shift value |
279 | ld8 r24 = [r26] // get clksrc_cycle_last value |
280 | (p9) cmp.eq p13,p0 = 0,r30 // if mmio_ptr, clear p13 jitter control |
281 | ;; |
282 | .pred.rel.mutex p8,p9 |
283 | MOV_FROM_ITC(p8, p6, r2, r10) // CPU_TIMER. 36 clocks latency!!! |
284 | (p9) ld8 r2 = [r30] // MMIO_TIMER. Could also have latency issues.. |
285 | (p13) ld8 r25 = [r19] // get itc_lastcycle value |
286 | ld8 r9 = [r22],IA64_TIMESPEC_TV_NSEC_OFFSET // tv_sec |
287 | ;; |
288 | ld8 r8 = [r22],-IA64_TIMESPEC_TV_NSEC_OFFSET // tv_nsec |
289 | (p13) sub r3 = r25,r2 // Diff needed before comparison (thanks davidm) |
290 | ;; |
291 | (p13) cmp.gt.unc p6,p7 = r3,r0 // check if it is less than last. p6,p7 cleared |
292 | sub r10 = r2,r24 // current_cycle - last_cycle |
293 | ;; |
294 | (p6) sub r10 = r25,r24 // time we got was less than last_cycle |
295 | (p7) mov ar.ccv = r25 // more than last_cycle. Prep for cmpxchg |
296 | ;; |
297 | (p7) cmpxchg8.rel r3 = [r19],r2,ar.ccv |
298 | ;; |
299 | (p7) cmp.ne p7,p0 = r25,r3 // if cmpxchg not successful |
300 | ;; |
301 | (p7) sub r10 = r3,r24 // then use new last_cycle instead |
302 | ;; |
303 | and r10 = r10,r14 // Apply mask |
304 | ;; |
305 | setf.sig f8 = r10 |
306 | nop.i 123 |
307 | ;; |
308 | // fault check takes 5 cycles and we have spare time |
309 | EX(.fail_efault, probe.w.fault r31, 3) |
310 | xmpy.l f8 = f8,f7 // nsec_per_cyc*(counter-last_counter) |
311 | ;; |
312 | getf.sig r2 = f8 |
313 | mf |
314 | ;; |
315 | ld4 r10 = [r20] // gtod_lock.sequence |
316 | shr.u r2 = r2,r23 // shift by factor |
317 | ;; |
318 | add r8 = r8,r2 // Add xtime.nsecs |
319 | cmp4.ne p7,p0 = r28,r10 |
320 | (p7) br.cond.dpnt.few .time_redo // sequence number changed, redo |
321 | // End critical section. |
322 | // Now r8=tv->tv_nsec and r9=tv->tv_sec |
323 | mov r10 = r0 |
324 | movl r2 = 1000000000 |
325 | add r23 = IA64_TIMESPEC_TV_NSEC_OFFSET, r31 |
326 | (p14) movl r3 = 2361183241434822607 // Prep for / 1000 hack |
327 | ;; |
328 | .time_normalize: |
329 | mov r21 = r8 |
330 | cmp.ge p6,p0 = r8,r2 |
331 | (p14) shr.u r20 = r8, 3 // We can repeat this if necessary just wasting time |
332 | ;; |
333 | (p14) setf.sig f8 = r20 |
334 | (p6) sub r8 = r8,r2 |
335 | (p6) add r9 = 1,r9 // two nops before the branch. |
336 | (p14) setf.sig f7 = r3 // Chances for repeats are 1 in 10000 for gettod |
337 | (p6) br.cond.dpnt.few .time_normalize |
338 | ;; |
339 | // Divided by 8 though shift. Now divide by 125 |
340 | // The compiler was able to do that with a multiply |
341 | // and a shift and we do the same |
342 | EX(.fail_efault, probe.w.fault r23, 3) // This also costs 5 cycles |
343 | (p14) xmpy.hu f8 = f8, f7 // xmpy has 5 cycles latency so use it |
344 | ;; |
345 | (p14) getf.sig r2 = f8 |
346 | ;; |
347 | mov r8 = r0 |
348 | (p14) shr.u r21 = r2, 4 |
349 | ;; |
350 | EX(.fail_efault, st8 [r31] = r9) |
351 | EX(.fail_efault, st8 [r23] = r21) |
352 | FSYS_RETURN |
353 | .fail_einval: |
354 | mov r8 = EINVAL |
355 | mov r10 = -1 |
356 | FSYS_RETURN |
357 | .fail_efault: |
358 | mov r8 = EFAULT |
359 | mov r10 = -1 |
360 | FSYS_RETURN |
361 | END(fsys_gettimeofday) |
362 | |
363 | ENTRY(fsys_clock_gettime) |
364 | .prologue |
365 | .altrp b6 |
366 | .body |
367 | cmp4.ltu p6, p0 = CLOCK_MONOTONIC, r32 |
368 | // Fallback if this is not CLOCK_REALTIME or CLOCK_MONOTONIC |
369 | (p6) br.spnt.few fsys_fallback_syscall |
370 | mov r31 = r33 |
371 | shl r30 = r32,15 |
372 | br.many .gettime |
373 | END(fsys_clock_gettime) |
374 | |
375 | /* |
376 | * long fsys_rt_sigprocmask (int how, sigset_t *set, sigset_t *oset, size_t sigsetsize). |
377 | */ |
378 | #if _NSIG_WORDS != 1 |
379 | # error Sorry, fsys_rt_sigprocmask() needs to be updated for _NSIG_WORDS != 1. |
380 | #endif |
381 | ENTRY(fsys_rt_sigprocmask) |
382 | .prologue |
383 | .altrp b6 |
384 | .body |
385 | |
386 | add r2=IA64_TASK_BLOCKED_OFFSET,r16 |
387 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 |
388 | cmp4.ltu p6,p0=SIG_SETMASK,r32 |
389 | |
390 | cmp.ne p15,p0=r0,r34 // oset != NULL? |
391 | tnat.nz p8,p0=r34 |
392 | add r31=IA64_TASK_SIGHAND_OFFSET,r16 |
393 | ;; |
394 | ld8 r3=[r2] // read/prefetch current->blocked |
395 | ld4 r9=[r9] |
396 | tnat.nz.or p6,p0=r35 |
397 | |
398 | cmp.ne.or p6,p0=_NSIG_WORDS*8,r35 |
399 | tnat.nz.or p6,p0=r32 |
400 | (p6) br.spnt.few .fail_einval // fail with EINVAL |
401 | ;; |
402 | #ifdef CONFIG_SMP |
403 | ld8 r31=[r31] // r31 <- current->sighand |
404 | #endif |
405 | and r9=TIF_ALLWORK_MASK,r9 |
406 | tnat.nz.or p8,p0=r33 |
407 | ;; |
408 | cmp.ne p7,p0=0,r9 |
409 | cmp.eq p6,p0=r0,r33 // set == NULL? |
410 | add r31=IA64_SIGHAND_SIGLOCK_OFFSET,r31 // r31 <- current->sighand->siglock |
411 | (p8) br.spnt.few .fail_efault // fail with EFAULT |
412 | (p7) br.spnt.many fsys_fallback_syscall // got pending kernel work... |
413 | (p6) br.dpnt.many .store_mask // -> short-circuit to just reading the signal mask |
414 | |
415 | /* Argh, we actually have to do some work and _update_ the signal mask: */ |
416 | |
417 | EX(.fail_efault, probe.r.fault r33, 3) // verify user has read-access to *set |
418 | EX(.fail_efault, ld8 r14=[r33]) // r14 <- *set |
419 | mov r17=(1 << (SIGKILL - 1)) | (1 << (SIGSTOP - 1)) |
420 | ;; |
421 | |
422 | RSM_PSR_I(p0, r18, r19) // mask interrupt delivery |
423 | andcm r14=r14,r17 // filter out SIGKILL & SIGSTOP |
424 | mov r8=EINVAL // default to EINVAL |
425 | |
426 | #ifdef CONFIG_SMP |
427 | // __ticket_spin_trylock(r31) |
428 | ld4 r17=[r31] |
429 | ;; |
430 | mov.m ar.ccv=r17 |
431 | extr.u r9=r17,17,15 |
432 | adds r19=1,r17 |
433 | extr.u r18=r17,0,15 |
434 | ;; |
435 | cmp.eq p6,p7=r9,r18 |
436 | ;; |
437 | (p6) cmpxchg4.acq r9=[r31],r19,ar.ccv |
438 | (p6) dep.z r20=r19,1,15 // next serving ticket for unlock |
439 | (p7) br.cond.spnt.many .lock_contention |
440 | ;; |
441 | cmp4.eq p0,p7=r9,r17 |
442 | adds r31=2,r31 |
443 | (p7) br.cond.spnt.many .lock_contention |
444 | ld8 r3=[r2] // re-read current->blocked now that we hold the lock |
445 | ;; |
446 | #else |
447 | ld8 r3=[r2] // re-read current->blocked now that we hold the lock |
448 | #endif |
449 | add r18=IA64_TASK_PENDING_OFFSET+IA64_SIGPENDING_SIGNAL_OFFSET,r16 |
450 | add r19=IA64_TASK_SIGNAL_OFFSET,r16 |
451 | cmp4.eq p6,p0=SIG_BLOCK,r32 |
452 | ;; |
453 | ld8 r19=[r19] // r19 <- current->signal |
454 | cmp4.eq p7,p0=SIG_UNBLOCK,r32 |
455 | cmp4.eq p8,p0=SIG_SETMASK,r32 |
456 | ;; |
457 | ld8 r18=[r18] // r18 <- current->pending.signal |
458 | .pred.rel.mutex p6,p7,p8 |
459 | (p6) or r14=r3,r14 // SIG_BLOCK |
460 | (p7) andcm r14=r3,r14 // SIG_UNBLOCK |
461 | |
462 | (p8) mov r14=r14 // SIG_SETMASK |
463 | (p6) mov r8=0 // clear error code |
464 | // recalc_sigpending() |
465 | add r17=IA64_SIGNAL_GROUP_STOP_COUNT_OFFSET,r19 |
466 | |
467 | add r19=IA64_SIGNAL_SHARED_PENDING_OFFSET+IA64_SIGPENDING_SIGNAL_OFFSET,r19 |
468 | ;; |
469 | ld4 r17=[r17] // r17 <- current->signal->group_stop_count |
470 | (p7) mov r8=0 // clear error code |
471 | |
472 | ld8 r19=[r19] // r19 <- current->signal->shared_pending |
473 | ;; |
474 | cmp4.gt p6,p7=r17,r0 // p6/p7 <- (current->signal->group_stop_count > 0)? |
475 | (p8) mov r8=0 // clear error code |
476 | |
477 | or r18=r18,r19 // r18 <- current->pending | current->signal->shared_pending |
478 | ;; |
479 | // r18 <- (current->pending | current->signal->shared_pending) & ~current->blocked: |
480 | andcm r18=r18,r14 |
481 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 |
482 | ;; |
483 | |
484 | (p7) cmp.ne.or.andcm p6,p7=r18,r0 // p6/p7 <- signal pending |
485 | mov r19=0 // i must not leak kernel bits... |
486 | (p6) br.cond.dpnt.many .sig_pending |
487 | ;; |
488 | |
489 | 1: ld4 r17=[r9] // r17 <- current->thread_info->flags |
490 | ;; |
491 | mov ar.ccv=r17 |
492 | and r18=~_TIF_SIGPENDING,r17 // r18 <- r17 & ~(1 << TIF_SIGPENDING) |
493 | ;; |
494 | |
495 | st8 [r2]=r14 // update current->blocked with new mask |
496 | cmpxchg4.acq r8=[r9],r18,ar.ccv // current->thread_info->flags <- r18 |
497 | ;; |
498 | cmp.ne p6,p0=r17,r8 // update failed? |
499 | (p6) br.cond.spnt.few 1b // yes -> retry |
500 | |
501 | #ifdef CONFIG_SMP |
502 | // __ticket_spin_unlock(r31) |
503 | st2.rel [r31]=r20 |
504 | mov r20=0 // i must not leak kernel bits... |
505 | #endif |
506 | SSM_PSR_I(p0, p9, r31) |
507 | ;; |
508 | |
509 | srlz.d // ensure psr.i is set again |
510 | mov r18=0 // i must not leak kernel bits... |
511 | |
512 | .store_mask: |
513 | EX(.fail_efault, (p15) probe.w.fault r34, 3) // verify user has write-access to *oset |
514 | EX(.fail_efault, (p15) st8 [r34]=r3) |
515 | mov r2=0 // i must not leak kernel bits... |
516 | mov r3=0 // i must not leak kernel bits... |
517 | mov r8=0 // return 0 |
518 | mov r9=0 // i must not leak kernel bits... |
519 | mov r14=0 // i must not leak kernel bits... |
520 | mov r17=0 // i must not leak kernel bits... |
521 | mov r31=0 // i must not leak kernel bits... |
522 | FSYS_RETURN |
523 | |
524 | .sig_pending: |
525 | #ifdef CONFIG_SMP |
526 | // __ticket_spin_unlock(r31) |
527 | st2.rel [r31]=r20 // release the lock |
528 | #endif |
529 | SSM_PSR_I(p0, p9, r17) |
530 | ;; |
531 | srlz.d |
532 | br.sptk.many fsys_fallback_syscall // with signal pending, do the heavy-weight syscall |
533 | |
534 | #ifdef CONFIG_SMP |
535 | .lock_contention: |
536 | /* Rather than spinning here, fall back on doing a heavy-weight syscall. */ |
537 | SSM_PSR_I(p0, p9, r17) |
538 | ;; |
539 | srlz.d |
540 | br.sptk.many fsys_fallback_syscall |
541 | #endif |
542 | END(fsys_rt_sigprocmask) |
543 | |
544 | /* |
545 | * fsys_getcpu doesn't use the third parameter in this implementation. It reads |
546 | * current_thread_info()->cpu and corresponding node in cpu_to_node_map. |
547 | */ |
548 | ENTRY(fsys_getcpu) |
549 | .prologue |
550 | .altrp b6 |
551 | .body |
552 | ;; |
553 | add r2=TI_FLAGS+IA64_TASK_SIZE,r16 |
554 | tnat.nz p6,p0 = r32 // guard against NaT argument |
555 | add r3=TI_CPU+IA64_TASK_SIZE,r16 |
556 | ;; |
557 | ld4 r3=[r3] // M r3 = thread_info->cpu |
558 | ld4 r2=[r2] // M r2 = thread_info->flags |
559 | (p6) br.cond.spnt.few .fail_einval // B |
560 | ;; |
561 | tnat.nz p7,p0 = r33 // I guard against NaT argument |
562 | (p7) br.cond.spnt.few .fail_einval // B |
563 | #ifdef CONFIG_NUMA |
564 | movl r17=cpu_to_node_map |
565 | ;; |
566 | EX(.fail_efault, probe.w.fault r32, 3) // M This takes 5 cycles |
567 | EX(.fail_efault, probe.w.fault r33, 3) // M This takes 5 cycles |
568 | shladd r18=r3,1,r17 |
569 | ;; |
570 | ld2 r20=[r18] // r20 = cpu_to_node_map[cpu] |
571 | and r2 = TIF_ALLWORK_MASK,r2 |
572 | ;; |
573 | cmp.ne p8,p0=0,r2 |
574 | (p8) br.spnt.many fsys_fallback_syscall |
575 | ;; |
576 | ;; |
577 | EX(.fail_efault, st4 [r32] = r3) |
578 | EX(.fail_efault, st2 [r33] = r20) |
579 | mov r8=0 |
580 | ;; |
581 | #else |
582 | EX(.fail_efault, probe.w.fault r32, 3) // M This takes 5 cycles |
583 | EX(.fail_efault, probe.w.fault r33, 3) // M This takes 5 cycles |
584 | and r2 = TIF_ALLWORK_MASK,r2 |
585 | ;; |
586 | cmp.ne p8,p0=0,r2 |
587 | (p8) br.spnt.many fsys_fallback_syscall |
588 | ;; |
589 | EX(.fail_efault, st4 [r32] = r3) |
590 | EX(.fail_efault, st2 [r33] = r0) |
591 | mov r8=0 |
592 | ;; |
593 | #endif |
594 | FSYS_RETURN |
595 | END(fsys_getcpu) |
596 | |
597 | ENTRY(fsys_fallback_syscall) |
598 | .prologue |
599 | .altrp b6 |
600 | .body |
601 | /* |
602 | * We only get here from light-weight syscall handlers. Thus, we already |
603 | * know that r15 contains a valid syscall number. No need to re-check. |
604 | */ |
605 | adds r17=-1024,r15 |
606 | movl r14=sys_call_table |
607 | ;; |
608 | RSM_PSR_I(p0, r26, r27) |
609 | shladd r18=r17,3,r14 |
610 | ;; |
611 | ld8 r18=[r18] // load normal (heavy-weight) syscall entry-point |
612 | MOV_FROM_PSR(p0, r29, r26) // read psr (12 cyc load latency) |
613 | mov r27=ar.rsc |
614 | mov r21=ar.fpsr |
615 | mov r26=ar.pfs |
616 | END(fsys_fallback_syscall) |
617 | /* FALL THROUGH */ |
618 | GLOBAL_ENTRY(paravirt_fsys_bubble_down) |
619 | .prologue |
620 | .altrp b6 |
621 | .body |
622 | /* |
623 | * We get here for syscalls that don't have a lightweight |
624 | * handler. For those, we need to bubble down into the kernel |
625 | * and that requires setting up a minimal pt_regs structure, |
626 | * and initializing the CPU state more or less as if an |
627 | * interruption had occurred. To make syscall-restarts work, |
628 | * we setup pt_regs such that cr_iip points to the second |
629 | * instruction in syscall_via_break. Decrementing the IP |
630 | * hence will restart the syscall via break and not |
631 | * decrementing IP will return us to the caller, as usual. |
632 | * Note that we preserve the value of psr.pp rather than |
633 | * initializing it from dcr.pp. This makes it possible to |
634 | * distinguish fsyscall execution from other privileged |
635 | * execution. |
636 | * |
637 | * On entry: |
638 | * - normal fsyscall handler register usage, except |
639 | * that we also have: |
640 | * - r18: address of syscall entry point |
641 | * - r21: ar.fpsr |
642 | * - r26: ar.pfs |
643 | * - r27: ar.rsc |
644 | * - r29: psr |
645 | * |
646 | * We used to clear some PSR bits here but that requires slow |
647 | * serialization. Fortuntely, that isn't really necessary. |
648 | * The rationale is as follows: we used to clear bits |
649 | * ~PSR_PRESERVED_BITS in PSR.L. Since |
650 | * PSR_PRESERVED_BITS==PSR.{UP,MFL,MFH,PK,DT,PP,SP,RT,IC}, we |
651 | * ended up clearing PSR.{BE,AC,I,DFL,DFH,DI,DB,SI,TB}. |
652 | * However, |
653 | * |
654 | * PSR.BE : already is turned off in __kernel_syscall_via_epc() |
655 | * PSR.AC : don't care (kernel normally turns PSR.AC on) |
656 | * PSR.I : already turned off by the time paravirt_fsys_bubble_down gets |
657 | * invoked |
658 | * PSR.DFL: always 0 (kernel never turns it on) |
659 | * PSR.DFH: don't care --- kernel never touches f32-f127 on its own |
660 | * initiative |
661 | * PSR.DI : always 0 (kernel never turns it on) |
662 | * PSR.SI : always 0 (kernel never turns it on) |
663 | * PSR.DB : don't care --- kernel never enables kernel-level |
664 | * breakpoints |
665 | * PSR.TB : must be 0 already; if it wasn't zero on entry to |
666 | * __kernel_syscall_via_epc, the branch to paravirt_fsys_bubble_down |
667 | * will trigger a taken branch; the taken-trap-handler then |
668 | * converts the syscall into a break-based system-call. |
669 | */ |
670 | /* |
671 | * Reading psr.l gives us only bits 0-31, psr.it, and psr.mc. |
672 | * The rest we have to synthesize. |
673 | */ |
674 | # define PSR_ONE_BITS ((3 << IA64_PSR_CPL0_BIT) \ |
675 | | (0x1 << IA64_PSR_RI_BIT) \ |
676 | | IA64_PSR_BN | IA64_PSR_I) |
677 | |
678 | invala // M0|1 |
679 | movl r14=ia64_ret_from_syscall // X |
680 | |
681 | nop.m 0 |
682 | movl r28=__kernel_syscall_via_break // X create cr.iip |
683 | ;; |
684 | |
685 | mov r2=r16 // A get task addr to addl-addressable register |
686 | adds r16=IA64_TASK_THREAD_ON_USTACK_OFFSET,r16 // A |
687 | mov r31=pr // I0 save pr (2 cyc) |
688 | ;; |
689 | st1 [r16]=r0 // M2|3 clear current->thread.on_ustack flag |
690 | addl r22=IA64_RBS_OFFSET,r2 // A compute base of RBS |
691 | add r3=TI_FLAGS+IA64_TASK_SIZE,r2 // A |
692 | ;; |
693 | ld4 r3=[r3] // M0|1 r3 = current_thread_info()->flags |
694 | lfetch.fault.excl.nt1 [r22] // M0|1 prefetch register backing-store |
695 | nop.i 0 |
696 | ;; |
697 | mov ar.rsc=0 // M2 set enforced lazy mode, pl 0, LE, loadrs=0 |
698 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
699 | MOV_FROM_ITC(p0, p6, r30, r23) // M get cycle for accounting |
700 | #else |
701 | nop.m 0 |
702 | #endif |
703 | nop.i 0 |
704 | ;; |
705 | mov r23=ar.bspstore // M2 (12 cyc) save ar.bspstore |
706 | mov.m r24=ar.rnat // M2 (5 cyc) read ar.rnat (dual-issues!) |
707 | nop.i 0 |
708 | ;; |
709 | mov ar.bspstore=r22 // M2 (6 cyc) switch to kernel RBS |
710 | movl r8=PSR_ONE_BITS // X |
711 | ;; |
712 | mov r25=ar.unat // M2 (5 cyc) save ar.unat |
713 | mov r19=b6 // I0 save b6 (2 cyc) |
714 | mov r20=r1 // A save caller's gp in r20 |
715 | ;; |
716 | or r29=r8,r29 // A construct cr.ipsr value to save |
717 | mov b6=r18 // I0 copy syscall entry-point to b6 (7 cyc) |
718 | addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r2 // A compute base of memory stack |
719 | |
720 | mov r18=ar.bsp // M2 save (kernel) ar.bsp (12 cyc) |
721 | cmp.ne pKStk,pUStk=r0,r0 // A set pKStk <- 0, pUStk <- 1 |
722 | br.call.sptk.many b7=ia64_syscall_setup // B |
723 | ;; |
724 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
725 | // mov.m r30=ar.itc is called in advance |
726 | add r16=TI_AC_STAMP+IA64_TASK_SIZE,r2 |
727 | add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r2 |
728 | ;; |
729 | ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // time at last check in kernel |
730 | ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // time at leave kernel |
731 | ;; |
732 | ld8 r20=[r16],TI_AC_STAMP-TI_AC_STIME // cumulated stime |
733 | ld8 r21=[r17] // cumulated utime |
734 | sub r22=r19,r18 // stime before leave kernel |
735 | ;; |
736 | st8 [r16]=r30,TI_AC_STIME-TI_AC_STAMP // update stamp |
737 | sub r18=r30,r19 // elapsed time in user mode |
738 | ;; |
739 | add r20=r20,r22 // sum stime |
740 | add r21=r21,r18 // sum utime |
741 | ;; |
742 | st8 [r16]=r20 // update stime |
743 | st8 [r17]=r21 // update utime |
744 | ;; |
745 | #endif |
746 | mov ar.rsc=0x3 // M2 set eager mode, pl 0, LE, loadrs=0 |
747 | mov rp=r14 // I0 set the real return addr |
748 | and r3=_TIF_SYSCALL_TRACEAUDIT,r3 // A |
749 | ;; |
750 | SSM_PSR_I(p0, p6, r22) // M2 we're on kernel stacks now, reenable irqs |
751 | cmp.eq p8,p0=r3,r0 // A |
752 | (p10) br.cond.spnt.many ia64_ret_from_syscall // B return if bad call-frame or r15 is a NaT |
753 | |
754 | nop.m 0 |
755 | (p8) br.call.sptk.many b6=b6 // B (ignore return address) |
756 | br.cond.spnt ia64_trace_syscall // B |
757 | END(paravirt_fsys_bubble_down) |
758 | |
759 | .rodata |
760 | .align 8 |
761 | .globl paravirt_fsyscall_table |
762 | |
763 | data8 paravirt_fsys_bubble_down |
764 | paravirt_fsyscall_table: |
765 | data8 fsys_ni_syscall |
766 | data8 0 // exit // 1025 |
767 | data8 0 // read |
768 | data8 0 // write |
769 | data8 0 // open |
770 | data8 0 // close |
771 | data8 0 // creat // 1030 |
772 | data8 0 // link |
773 | data8 0 // unlink |
774 | data8 0 // execve |
775 | data8 0 // chdir |
776 | data8 0 // fchdir // 1035 |
777 | data8 0 // utimes |
778 | data8 0 // mknod |
779 | data8 0 // chmod |
780 | data8 0 // chown |
781 | data8 0 // lseek // 1040 |
782 | data8 fsys_getpid // getpid |
783 | data8 fsys_getppid // getppid |
784 | data8 0 // mount |
785 | data8 0 // umount |
786 | data8 0 // setuid // 1045 |
787 | data8 0 // getuid |
788 | data8 0 // geteuid |
789 | data8 0 // ptrace |
790 | data8 0 // access |
791 | data8 0 // sync // 1050 |
792 | data8 0 // fsync |
793 | data8 0 // fdatasync |
794 | data8 0 // kill |
795 | data8 0 // rename |
796 | data8 0 // mkdir // 1055 |
797 | data8 0 // rmdir |
798 | data8 0 // dup |
799 | data8 0 // pipe |
800 | data8 0 // times |
801 | data8 0 // brk // 1060 |
802 | data8 0 // setgid |
803 | data8 0 // getgid |
804 | data8 0 // getegid |
805 | data8 0 // acct |
806 | data8 0 // ioctl // 1065 |
807 | data8 0 // fcntl |
808 | data8 0 // umask |
809 | data8 0 // chroot |
810 | data8 0 // ustat |
811 | data8 0 // dup2 // 1070 |
812 | data8 0 // setreuid |
813 | data8 0 // setregid |
814 | data8 0 // getresuid |
815 | data8 0 // setresuid |
816 | data8 0 // getresgid // 1075 |
817 | data8 0 // setresgid |
818 | data8 0 // getgroups |
819 | data8 0 // setgroups |
820 | data8 0 // getpgid |
821 | data8 0 // setpgid // 1080 |
822 | data8 0 // setsid |
823 | data8 0 // getsid |
824 | data8 0 // sethostname |
825 | data8 0 // setrlimit |
826 | data8 0 // getrlimit // 1085 |
827 | data8 0 // getrusage |
828 | data8 fsys_gettimeofday // gettimeofday |
829 | data8 0 // settimeofday |
830 | data8 0 // select |
831 | data8 0 // poll // 1090 |
832 | data8 0 // symlink |
833 | data8 0 // readlink |
834 | data8 0 // uselib |
835 | data8 0 // swapon |
836 | data8 0 // swapoff // 1095 |
837 | data8 0 // reboot |
838 | data8 0 // truncate |
839 | data8 0 // ftruncate |
840 | data8 0 // fchmod |
841 | data8 0 // fchown // 1100 |
842 | data8 0 // getpriority |
843 | data8 0 // setpriority |
844 | data8 0 // statfs |
845 | data8 0 // fstatfs |
846 | data8 0 // gettid // 1105 |
847 | data8 0 // semget |
848 | data8 0 // semop |
849 | data8 0 // semctl |
850 | data8 0 // msgget |
851 | data8 0 // msgsnd // 1110 |
852 | data8 0 // msgrcv |
853 | data8 0 // msgctl |
854 | data8 0 // shmget |
855 | data8 0 // shmat |
856 | data8 0 // shmdt // 1115 |
857 | data8 0 // shmctl |
858 | data8 0 // syslog |
859 | data8 0 // setitimer |
860 | data8 0 // getitimer |
861 | data8 0 // 1120 |
862 | data8 0 |
863 | data8 0 |
864 | data8 0 // vhangup |
865 | data8 0 // lchown |
866 | data8 0 // remap_file_pages // 1125 |
867 | data8 0 // wait4 |
868 | data8 0 // sysinfo |
869 | data8 0 // clone |
870 | data8 0 // setdomainname |
871 | data8 0 // newuname // 1130 |
872 | data8 0 // adjtimex |
873 | data8 0 |
874 | data8 0 // init_module |
875 | data8 0 // delete_module |
876 | data8 0 // 1135 |
877 | data8 0 |
878 | data8 0 // quotactl |
879 | data8 0 // bdflush |
880 | data8 0 // sysfs |
881 | data8 0 // personality // 1140 |
882 | data8 0 // afs_syscall |
883 | data8 0 // setfsuid |
884 | data8 0 // setfsgid |
885 | data8 0 // getdents |
886 | data8 0 // flock // 1145 |
887 | data8 0 // readv |
888 | data8 0 // writev |
889 | data8 0 // pread64 |
890 | data8 0 // pwrite64 |
891 | data8 0 // sysctl // 1150 |
892 | data8 0 // mmap |
893 | data8 0 // munmap |
894 | data8 0 // mlock |
895 | data8 0 // mlockall |
896 | data8 0 // mprotect // 1155 |
897 | data8 0 // mremap |
898 | data8 0 // msync |
899 | data8 0 // munlock |
900 | data8 0 // munlockall |
901 | data8 0 // sched_getparam // 1160 |
902 | data8 0 // sched_setparam |
903 | data8 0 // sched_getscheduler |
904 | data8 0 // sched_setscheduler |
905 | data8 0 // sched_yield |
906 | data8 0 // sched_get_priority_max // 1165 |
907 | data8 0 // sched_get_priority_min |
908 | data8 0 // sched_rr_get_interval |
909 | data8 0 // nanosleep |
910 | data8 0 // nfsservctl |
911 | data8 0 // prctl // 1170 |
912 | data8 0 // getpagesize |
913 | data8 0 // mmap2 |
914 | data8 0 // pciconfig_read |
915 | data8 0 // pciconfig_write |
916 | data8 0 // perfmonctl // 1175 |
917 | data8 0 // sigaltstack |
918 | data8 0 // rt_sigaction |
919 | data8 0 // rt_sigpending |
920 | data8 fsys_rt_sigprocmask // rt_sigprocmask |
921 | data8 0 // rt_sigqueueinfo // 1180 |
922 | data8 0 // rt_sigreturn |
923 | data8 0 // rt_sigsuspend |
924 | data8 0 // rt_sigtimedwait |
925 | data8 0 // getcwd |
926 | data8 0 // capget // 1185 |
927 | data8 0 // capset |
928 | data8 0 // sendfile |
929 | data8 0 |
930 | data8 0 |
931 | data8 0 // socket // 1190 |
932 | data8 0 // bind |
933 | data8 0 // connect |
934 | data8 0 // listen |
935 | data8 0 // accept |
936 | data8 0 // getsockname // 1195 |
937 | data8 0 // getpeername |
938 | data8 0 // socketpair |
939 | data8 0 // send |
940 | data8 0 // sendto |
941 | data8 0 // recv // 1200 |
942 | data8 0 // recvfrom |
943 | data8 0 // shutdown |
944 | data8 0 // setsockopt |
945 | data8 0 // getsockopt |
946 | data8 0 // sendmsg // 1205 |
947 | data8 0 // recvmsg |
948 | data8 0 // pivot_root |
949 | data8 0 // mincore |
950 | data8 0 // madvise |
951 | data8 0 // newstat // 1210 |
952 | data8 0 // newlstat |
953 | data8 0 // newfstat |
954 | data8 0 // clone2 |
955 | data8 0 // getdents64 |
956 | data8 0 // getunwind // 1215 |
957 | data8 0 // readahead |
958 | data8 0 // setxattr |
959 | data8 0 // lsetxattr |
960 | data8 0 // fsetxattr |
961 | data8 0 // getxattr // 1220 |
962 | data8 0 // lgetxattr |
963 | data8 0 // fgetxattr |
964 | data8 0 // listxattr |
965 | data8 0 // llistxattr |
966 | data8 0 // flistxattr // 1225 |
967 | data8 0 // removexattr |
968 | data8 0 // lremovexattr |
969 | data8 0 // fremovexattr |
970 | data8 0 // tkill |
971 | data8 0 // futex // 1230 |
972 | data8 0 // sched_setaffinity |
973 | data8 0 // sched_getaffinity |
974 | data8 fsys_set_tid_address // set_tid_address |
975 | data8 0 // fadvise64_64 |
976 | data8 0 // tgkill // 1235 |
977 | data8 0 // exit_group |
978 | data8 0 // lookup_dcookie |
979 | data8 0 // io_setup |
980 | data8 0 // io_destroy |
981 | data8 0 // io_getevents // 1240 |
982 | data8 0 // io_submit |
983 | data8 0 // io_cancel |
984 | data8 0 // epoll_create |
985 | data8 0 // epoll_ctl |
986 | data8 0 // epoll_wait // 1245 |
987 | data8 0 // restart_syscall |
988 | data8 0 // semtimedop |
989 | data8 0 // timer_create |
990 | data8 0 // timer_settime |
991 | data8 0 // timer_gettime // 1250 |
992 | data8 0 // timer_getoverrun |
993 | data8 0 // timer_delete |
994 | data8 0 // clock_settime |
995 | data8 fsys_clock_gettime // clock_gettime |
996 | data8 0 // clock_getres // 1255 |
997 | data8 0 // clock_nanosleep |
998 | data8 0 // fstatfs64 |
999 | data8 0 // statfs64 |
1000 | data8 0 // mbind |
1001 | data8 0 // get_mempolicy // 1260 |
1002 | data8 0 // set_mempolicy |
1003 | data8 0 // mq_open |
1004 | data8 0 // mq_unlink |
1005 | data8 0 // mq_timedsend |
1006 | data8 0 // mq_timedreceive // 1265 |
1007 | data8 0 // mq_notify |
1008 | data8 0 // mq_getsetattr |
1009 | data8 0 // kexec_load |
1010 | data8 0 // vserver |
1011 | data8 0 // waitid // 1270 |
1012 | data8 0 // add_key |
1013 | data8 0 // request_key |
1014 | data8 0 // keyctl |
1015 | data8 0 // ioprio_set |
1016 | data8 0 // ioprio_get // 1275 |
1017 | data8 0 // move_pages |
1018 | data8 0 // inotify_init |
1019 | data8 0 // inotify_add_watch |
1020 | data8 0 // inotify_rm_watch |
1021 | data8 0 // migrate_pages // 1280 |
1022 | data8 0 // openat |
1023 | data8 0 // mkdirat |
1024 | data8 0 // mknodat |
1025 | data8 0 // fchownat |
1026 | data8 0 // futimesat // 1285 |
1027 | data8 0 // newfstatat |
1028 | data8 0 // unlinkat |
1029 | data8 0 // renameat |
1030 | data8 0 // linkat |
1031 | data8 0 // symlinkat // 1290 |
1032 | data8 0 // readlinkat |
1033 | data8 0 // fchmodat |
1034 | data8 0 // faccessat |
1035 | data8 0 |
1036 | data8 0 // 1295 |
1037 | data8 0 // unshare |
1038 | data8 0 // splice |
1039 | data8 0 // set_robust_list |
1040 | data8 0 // get_robust_list |
1041 | data8 0 // sync_file_range // 1300 |
1042 | data8 0 // tee |
1043 | data8 0 // vmsplice |
1044 | data8 0 |
1045 | data8 fsys_getcpu // getcpu // 1304 |
1046 | |
1047 | // fill in zeros for the remaining entries |
1048 | .zero: |
1049 | .space paravirt_fsyscall_table + 8*NR_syscalls - .zero, 0 |
1050 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
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jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9