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1da177e4 LT |
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. | |
3bc207d2 FY |
13 | * 08-Feb-07 Fenghua Yu Implement fsys_getcpu. |
14 | * | |
1da177e4 LT |
15 | */ |
16 | ||
17 | #include <asm/asmmacro.h> | |
18 | #include <asm/errno.h> | |
39e01cb8 | 19 | #include <asm/asm-offsets.h> |
1da177e4 LT |
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 | ||
29 | /* | |
30 | * See Documentation/ia64/fsys.txt for details on fsyscalls. | |
31 | * | |
32 | * On entry to an fsyscall handler: | |
33 | * r10 = 0 (i.e., defaults to "successful syscall return") | |
34 | * r11 = saved ar.pfs (a user-level value) | |
35 | * r15 = system call number | |
36 | * r16 = "current" task pointer (in normal kernel-mode, this is in r13) | |
37 | * r32-r39 = system call arguments | |
38 | * b6 = return address (a user-level value) | |
39 | * ar.pfs = previous frame-state (a user-level value) | |
40 | * PSR.be = cleared to zero (i.e., little-endian byte order is in effect) | |
41 | * all other registers may contain values passed in from user-mode | |
42 | * | |
43 | * On return from an fsyscall handler: | |
44 | * r11 = saved ar.pfs (as passed into the fsyscall handler) | |
45 | * r15 = system call number (as passed into the fsyscall handler) | |
46 | * r32-r39 = system call arguments (as passed into the fsyscall handler) | |
47 | * b6 = return address (as passed into the fsyscall handler) | |
48 | * ar.pfs = previous frame-state (as passed into the fsyscall handler) | |
49 | */ | |
50 | ||
51 | ENTRY(fsys_ni_syscall) | |
52 | .prologue | |
53 | .altrp b6 | |
54 | .body | |
55 | mov r8=ENOSYS | |
56 | mov r10=-1 | |
57 | FSYS_RETURN | |
58 | END(fsys_ni_syscall) | |
59 | ||
60 | ENTRY(fsys_getpid) | |
61 | .prologue | |
62 | .altrp b6 | |
63 | .body | |
64 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 | |
65 | ;; | |
66 | ld4 r9=[r9] | |
67 | add r8=IA64_TASK_TGID_OFFSET,r16 | |
68 | ;; | |
69 | and r9=TIF_ALLWORK_MASK,r9 | |
70 | ld4 r8=[r8] // r8 = current->tgid | |
71 | ;; | |
72 | cmp.ne p8,p0=0,r9 | |
73 | (p8) br.spnt.many fsys_fallback_syscall | |
74 | FSYS_RETURN | |
75 | END(fsys_getpid) | |
76 | ||
77 | ENTRY(fsys_getppid) | |
78 | .prologue | |
79 | .altrp b6 | |
80 | .body | |
81 | add r17=IA64_TASK_GROUP_LEADER_OFFSET,r16 | |
82 | ;; | |
83 | ld8 r17=[r17] // r17 = current->group_leader | |
84 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 | |
85 | ;; | |
86 | ||
87 | ld4 r9=[r9] | |
88 | add r17=IA64_TASK_REAL_PARENT_OFFSET,r17 // r17 = ¤t->group_leader->real_parent | |
89 | ;; | |
90 | and r9=TIF_ALLWORK_MASK,r9 | |
91 | ||
92 | 1: ld8 r18=[r17] // r18 = current->group_leader->real_parent | |
93 | ;; | |
94 | cmp.ne p8,p0=0,r9 | |
95 | add r8=IA64_TASK_TGID_OFFSET,r18 // r8 = ¤t->group_leader->real_parent->tgid | |
96 | ;; | |
97 | ||
98 | /* | |
99 | * The .acq is needed to ensure that the read of tgid has returned its data before | |
100 | * we re-check "real_parent". | |
101 | */ | |
102 | ld4.acq r8=[r8] // r8 = current->group_leader->real_parent->tgid | |
103 | #ifdef CONFIG_SMP | |
104 | /* | |
105 | * Re-read current->group_leader->real_parent. | |
106 | */ | |
107 | ld8 r19=[r17] // r19 = current->group_leader->real_parent | |
108 | (p8) br.spnt.many fsys_fallback_syscall | |
109 | ;; | |
110 | cmp.ne p6,p0=r18,r19 // did real_parent change? | |
111 | mov r19=0 // i must not leak kernel bits... | |
112 | (p6) br.cond.spnt.few 1b // yes -> redo the read of tgid and the check | |
113 | ;; | |
114 | mov r17=0 // i must not leak kernel bits... | |
115 | mov r18=0 // i must not leak kernel bits... | |
116 | #else | |
117 | mov r17=0 // i must not leak kernel bits... | |
118 | mov r18=0 // i must not leak kernel bits... | |
119 | mov r19=0 // i must not leak kernel bits... | |
120 | #endif | |
121 | FSYS_RETURN | |
122 | END(fsys_getppid) | |
123 | ||
124 | ENTRY(fsys_set_tid_address) | |
125 | .prologue | |
126 | .altrp b6 | |
127 | .body | |
128 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 | |
129 | ;; | |
130 | ld4 r9=[r9] | |
131 | tnat.z p6,p7=r32 // check argument register for being NaT | |
132 | ;; | |
133 | and r9=TIF_ALLWORK_MASK,r9 | |
134 | add r8=IA64_TASK_PID_OFFSET,r16 | |
135 | add r18=IA64_TASK_CLEAR_CHILD_TID_OFFSET,r16 | |
136 | ;; | |
137 | ld4 r8=[r8] | |
138 | cmp.ne p8,p0=0,r9 | |
139 | mov r17=-1 | |
140 | ;; | |
141 | (p6) st8 [r18]=r32 | |
142 | (p7) st8 [r18]=r17 | |
143 | (p8) br.spnt.many fsys_fallback_syscall | |
144 | ;; | |
145 | mov r17=0 // i must not leak kernel bits... | |
146 | mov r18=0 // i must not leak kernel bits... | |
147 | FSYS_RETURN | |
148 | END(fsys_set_tid_address) | |
149 | ||
0aa366f3 TL |
150 | #if IA64_GTOD_LOCK_OFFSET !=0 |
151 | #error fsys_gettimeofday incompatible with changes to struct fsyscall_gtod_data_t | |
152 | #endif | |
153 | #if IA64_ITC_JITTER_OFFSET !=0 | |
154 | #error fsys_gettimeofday incompatible with changes to struct itc_jitter_data_t | |
1da177e4 LT |
155 | #endif |
156 | #define CLOCK_REALTIME 0 | |
157 | #define CLOCK_MONOTONIC 1 | |
158 | #define CLOCK_DIVIDE_BY_1000 0x4000 | |
159 | #define CLOCK_ADD_MONOTONIC 0x8000 | |
160 | ||
161 | ENTRY(fsys_gettimeofday) | |
162 | .prologue | |
163 | .altrp b6 | |
164 | .body | |
165 | mov r31 = r32 | |
166 | tnat.nz p6,p0 = r33 // guard against NaT argument | |
167 | (p6) br.cond.spnt.few .fail_einval | |
168 | mov r30 = CLOCK_DIVIDE_BY_1000 | |
169 | ;; | |
170 | .gettime: | |
171 | // Register map | |
172 | // Incoming r31 = pointer to address where to place result | |
173 | // r30 = flags determining how time is processed | |
174 | // r2,r3 = temp r4-r7 preserved | |
175 | // r8 = result nanoseconds | |
176 | // r9 = result seconds | |
177 | // r10 = temporary storage for clock difference | |
178 | // r11 = preserved: saved ar.pfs | |
179 | // r12 = preserved: memory stack | |
180 | // r13 = preserved: thread pointer | |
0aa366f3 | 181 | // r14 = address of mask / mask value |
1da177e4 LT |
182 | // r15 = preserved: system call number |
183 | // r16 = preserved: current task pointer | |
0aa366f3 TL |
184 | // r17 = (not used) |
185 | // r18 = (not used) | |
186 | // r19 = address of itc_lastcycle | |
187 | // r20 = struct fsyscall_gtod_data (= address of gtod_lock.sequence) | |
188 | // r21 = address of mmio_ptr | |
189 | // r22 = address of wall_time or monotonic_time | |
190 | // r23 = address of shift / value | |
191 | // r24 = address mult factor / cycle_last value | |
192 | // r25 = itc_lastcycle value | |
193 | // r26 = address clocksource cycle_last | |
194 | // r27 = (not used) | |
1da177e4 | 195 | // r28 = sequence number at the beginning of critcal section |
0aa366f3 | 196 | // r29 = address of itc_jitter |
1da177e4 LT |
197 | // r30 = time processing flags / memory address |
198 | // r31 = pointer to result | |
199 | // Predicates | |
200 | // p6,p7 short term use | |
201 | // p8 = timesource ar.itc | |
202 | // p9 = timesource mmio64 | |
0aa366f3 | 203 | // p10 = timesource mmio32 - not used |
1da177e4 | 204 | // p11 = timesource not to be handled by asm code |
0aa366f3 TL |
205 | // p12 = memory time source ( = p9 | p10) - not used |
206 | // p13 = do cmpxchg with itc_lastcycle | |
1da177e4 LT |
207 | // p14 = Divide by 1000 |
208 | // p15 = Add monotonic | |
209 | // | |
0aa366f3 TL |
210 | // Note that instructions are optimized for McKinley. McKinley can |
211 | // process two bundles simultaneously and therefore we continuously | |
212 | // try to feed the CPU two bundles and then a stop. | |
213 | // | |
214 | // Additional note that code has changed a lot. Optimization is TBD. | |
215 | // Comments begin with "?" are maybe outdated. | |
216 | tnat.nz p6,p0 = r31 // ? branch deferred to fit later bundle | |
1da177e4 LT |
217 | mov pr = r30,0xc000 // Set predicates according to function |
218 | add r2 = TI_FLAGS+IA64_TASK_SIZE,r16 | |
0aa366f3 | 219 | movl r20 = fsyscall_gtod_data // load fsyscall gettimeofday data address |
1da177e4 | 220 | ;; |
0aa366f3 TL |
221 | movl r29 = itc_jitter_data // itc_jitter |
222 | add r22 = IA64_GTOD_WALL_TIME_OFFSET,r20 // wall_time | |
1da177e4 | 223 | ld4 r2 = [r2] // process work pending flags |
0aa366f3 TL |
224 | ;; |
225 | (p15) add r22 = IA64_GTOD_MONO_TIME_OFFSET,r20 // monotonic_time | |
226 | add r21 = IA64_CLKSRC_MMIO_OFFSET,r20 | |
227 | add r19 = IA64_ITC_LASTCYCLE_OFFSET,r29 | |
1da177e4 | 228 | and r2 = TIF_ALLWORK_MASK,r2 |
0aa366f3 | 229 | (p6) br.cond.spnt.few .fail_einval // ? deferred branch |
1da177e4 | 230 | ;; |
0aa366f3 | 231 | add r26 = IA64_CLKSRC_CYCLE_LAST_OFFSET,r20 // clksrc_cycle_last |
1da177e4 LT |
232 | cmp.ne p6, p0 = 0, r2 // Fallback if work is scheduled |
233 | (p6) br.cond.spnt.many fsys_fallback_syscall | |
234 | ;; | |
0aa366f3 TL |
235 | // Begin critical section |
236 | .time_redo: | |
237 | ld4.acq r28 = [r20] // gtod_lock.sequence, Must take first | |
238 | ;; | |
239 | and r28 = ~1,r28 // And make sequence even to force retry if odd | |
1da177e4 | 240 | ;; |
0aa366f3 TL |
241 | ld8 r30 = [r21] // clocksource->mmio_ptr |
242 | add r24 = IA64_CLKSRC_MULT_OFFSET,r20 | |
243 | ld4 r2 = [r29] // itc_jitter value | |
244 | add r23 = IA64_CLKSRC_SHIFT_OFFSET,r20 | |
245 | add r14 = IA64_CLKSRC_MASK_OFFSET,r20 | |
1da177e4 | 246 | ;; |
0aa366f3 TL |
247 | ld4 r3 = [r24] // clocksource mult value |
248 | ld8 r14 = [r14] // clocksource mask value | |
249 | cmp.eq p8,p9 = 0,r30 // use cpu timer if no mmio_ptr | |
829a9996 | 250 | ;; |
0aa366f3 TL |
251 | setf.sig f7 = r3 // Setup for mult scaling of counter |
252 | (p8) cmp.ne p13,p0 = r2,r0 // need itc_jitter compensation, set p13 | |
253 | ld4 r23 = [r23] // clocksource shift value | |
254 | ld8 r24 = [r26] // get clksrc_cycle_last value | |
255 | (p9) cmp.eq p13,p0 = 0,r30 // if mmio_ptr, clear p13 jitter control | |
829a9996 | 256 | ;; |
0aa366f3 | 257 | .pred.rel.mutex p8,p9 |
1da177e4 | 258 | (p8) mov r2 = ar.itc // CPU_TIMER. 36 clocks latency!!! |
0aa366f3 TL |
259 | (p9) ld8 r2 = [r30] // MMIO_TIMER. Could also have latency issues.. |
260 | (p13) ld8 r25 = [r19] // get itc_lastcycle value | |
261 | ;; // ? could be removed by moving the last add upward | |
262 | ld8 r9 = [r22],IA64_TIMESPEC_TV_NSEC_OFFSET // tv_sec | |
263 | ;; | |
264 | ld8 r8 = [r22],-IA64_TIMESPEC_TV_NSEC_OFFSET // tv_nsec | |
265 | (p13) sub r3 = r25,r2 // Diff needed before comparison (thanks davidm) | |
266 | ;; | |
267 | (p13) cmp.gt.unc p6,p7 = r3,r0 // check if it is less than last. p6,p7 cleared | |
268 | sub r10 = r2,r24 // current_cycle - last_cycle | |
269 | ;; | |
270 | (p6) sub r10 = r25,r24 // time we got was less than last_cycle | |
1da177e4 LT |
271 | (p7) mov ar.ccv = r25 // more than last_cycle. Prep for cmpxchg |
272 | ;; | |
0aa366f3 TL |
273 | (p7) cmpxchg8.rel r3 = [r19],r2,ar.ccv |
274 | ;; | |
275 | (p7) cmp.ne p7,p0 = r25,r3 // if cmpxchg not successful | |
276 | ;; | |
277 | (p7) sub r10 = r3,r24 // then use new last_cycle instead | |
278 | ;; | |
1da177e4 LT |
279 | and r10 = r10,r14 // Apply mask |
280 | ;; | |
281 | setf.sig f8 = r10 | |
282 | nop.i 123 | |
283 | ;; | |
0aa366f3 TL |
284 | // fault check takes 5 cycles and we have spare time |
285 | EX(.fail_efault, probe.w.fault r31, 3) | |
1da177e4 | 286 | xmpy.l f8 = f8,f7 // nsec_per_cyc*(counter-last_counter) |
1da177e4 | 287 | ;; |
0aa366f3 | 288 | // ? simulate tbit.nz.or p7,p0 = r28,0 |
1da177e4 LT |
289 | getf.sig r2 = f8 |
290 | mf | |
1da177e4 | 291 | ;; |
0aa366f3 TL |
292 | ld4 r10 = [r20] // gtod_lock.sequence |
293 | shr.u r2 = r2,r23 // shift by factor | |
294 | ;; // ? overloaded 3 bundles! | |
1da177e4 | 295 | add r8 = r8,r2 // Add xtime.nsecs |
0aa366f3 TL |
296 | cmp4.ne p7,p0 = r28,r10 |
297 | (p7) br.cond.dpnt.few .time_redo // sequence number changed, redo | |
298 | // End critical section. | |
1da177e4 LT |
299 | // Now r8=tv->tv_nsec and r9=tv->tv_sec |
300 | mov r10 = r0 | |
301 | movl r2 = 1000000000 | |
302 | add r23 = IA64_TIMESPEC_TV_NSEC_OFFSET, r31 | |
303 | (p14) movl r3 = 2361183241434822607 // Prep for / 1000 hack | |
304 | ;; | |
305 | .time_normalize: | |
306 | mov r21 = r8 | |
307 | cmp.ge p6,p0 = r8,r2 | |
0aa366f3 | 308 | (p14) shr.u r20 = r8, 3 // We can repeat this if necessary just wasting time |
1da177e4 LT |
309 | ;; |
310 | (p14) setf.sig f8 = r20 | |
311 | (p6) sub r8 = r8,r2 | |
0aa366f3 TL |
312 | (p6) add r9 = 1,r9 // two nops before the branch. |
313 | (p14) setf.sig f7 = r3 // Chances for repeats are 1 in 10000 for gettod | |
1da177e4 LT |
314 | (p6) br.cond.dpnt.few .time_normalize |
315 | ;; | |
316 | // Divided by 8 though shift. Now divide by 125 | |
317 | // The compiler was able to do that with a multiply | |
318 | // and a shift and we do the same | |
0aa366f3 TL |
319 | EX(.fail_efault, probe.w.fault r23, 3) // This also costs 5 cycles |
320 | (p14) xmpy.hu f8 = f8, f7 // xmpy has 5 cycles latency so use it | |
1da177e4 LT |
321 | ;; |
322 | mov r8 = r0 | |
323 | (p14) getf.sig r2 = f8 | |
324 | ;; | |
325 | (p14) shr.u r21 = r2, 4 | |
326 | ;; | |
327 | EX(.fail_efault, st8 [r31] = r9) | |
328 | EX(.fail_efault, st8 [r23] = r21) | |
329 | FSYS_RETURN | |
330 | .fail_einval: | |
331 | mov r8 = EINVAL | |
332 | mov r10 = -1 | |
333 | FSYS_RETURN | |
334 | .fail_efault: | |
335 | mov r8 = EFAULT | |
336 | mov r10 = -1 | |
337 | FSYS_RETURN | |
338 | END(fsys_gettimeofday) | |
339 | ||
340 | ENTRY(fsys_clock_gettime) | |
341 | .prologue | |
342 | .altrp b6 | |
343 | .body | |
344 | cmp4.ltu p6, p0 = CLOCK_MONOTONIC, r32 | |
345 | // Fallback if this is not CLOCK_REALTIME or CLOCK_MONOTONIC | |
346 | (p6) br.spnt.few fsys_fallback_syscall | |
347 | mov r31 = r33 | |
348 | shl r30 = r32,15 | |
349 | br.many .gettime | |
350 | END(fsys_clock_gettime) | |
351 | ||
352 | /* | |
353 | * long fsys_rt_sigprocmask (int how, sigset_t *set, sigset_t *oset, size_t sigsetsize). | |
354 | */ | |
355 | #if _NSIG_WORDS != 1 | |
356 | # error Sorry, fsys_rt_sigprocmask() needs to be updated for _NSIG_WORDS != 1. | |
357 | #endif | |
358 | ENTRY(fsys_rt_sigprocmask) | |
359 | .prologue | |
360 | .altrp b6 | |
361 | .body | |
362 | ||
363 | add r2=IA64_TASK_BLOCKED_OFFSET,r16 | |
364 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 | |
365 | cmp4.ltu p6,p0=SIG_SETMASK,r32 | |
366 | ||
367 | cmp.ne p15,p0=r0,r34 // oset != NULL? | |
368 | tnat.nz p8,p0=r34 | |
369 | add r31=IA64_TASK_SIGHAND_OFFSET,r16 | |
370 | ;; | |
371 | ld8 r3=[r2] // read/prefetch current->blocked | |
372 | ld4 r9=[r9] | |
373 | tnat.nz.or p6,p0=r35 | |
374 | ||
375 | cmp.ne.or p6,p0=_NSIG_WORDS*8,r35 | |
376 | tnat.nz.or p6,p0=r32 | |
377 | (p6) br.spnt.few .fail_einval // fail with EINVAL | |
378 | ;; | |
379 | #ifdef CONFIG_SMP | |
380 | ld8 r31=[r31] // r31 <- current->sighand | |
381 | #endif | |
382 | and r9=TIF_ALLWORK_MASK,r9 | |
383 | tnat.nz.or p8,p0=r33 | |
384 | ;; | |
385 | cmp.ne p7,p0=0,r9 | |
386 | cmp.eq p6,p0=r0,r33 // set == NULL? | |
387 | add r31=IA64_SIGHAND_SIGLOCK_OFFSET,r31 // r31 <- current->sighand->siglock | |
388 | (p8) br.spnt.few .fail_efault // fail with EFAULT | |
389 | (p7) br.spnt.many fsys_fallback_syscall // got pending kernel work... | |
390 | (p6) br.dpnt.many .store_mask // -> short-circuit to just reading the signal mask | |
391 | ||
392 | /* Argh, we actually have to do some work and _update_ the signal mask: */ | |
393 | ||
394 | EX(.fail_efault, probe.r.fault r33, 3) // verify user has read-access to *set | |
395 | EX(.fail_efault, ld8 r14=[r33]) // r14 <- *set | |
396 | mov r17=(1 << (SIGKILL - 1)) | (1 << (SIGSTOP - 1)) | |
397 | ;; | |
398 | ||
399 | rsm psr.i // mask interrupt delivery | |
400 | mov ar.ccv=0 | |
401 | andcm r14=r14,r17 // filter out SIGKILL & SIGSTOP | |
402 | ||
403 | #ifdef CONFIG_SMP | |
404 | mov r17=1 | |
405 | ;; | |
406 | cmpxchg4.acq r18=[r31],r17,ar.ccv // try to acquire the lock | |
407 | mov r8=EINVAL // default to EINVAL | |
408 | ;; | |
409 | ld8 r3=[r2] // re-read current->blocked now that we hold the lock | |
410 | cmp4.ne p6,p0=r18,r0 | |
411 | (p6) br.cond.spnt.many .lock_contention | |
412 | ;; | |
413 | #else | |
414 | ld8 r3=[r2] // re-read current->blocked now that we hold the lock | |
415 | mov r8=EINVAL // default to EINVAL | |
416 | #endif | |
417 | add r18=IA64_TASK_PENDING_OFFSET+IA64_SIGPENDING_SIGNAL_OFFSET,r16 | |
418 | add r19=IA64_TASK_SIGNAL_OFFSET,r16 | |
419 | cmp4.eq p6,p0=SIG_BLOCK,r32 | |
420 | ;; | |
421 | ld8 r19=[r19] // r19 <- current->signal | |
422 | cmp4.eq p7,p0=SIG_UNBLOCK,r32 | |
423 | cmp4.eq p8,p0=SIG_SETMASK,r32 | |
424 | ;; | |
425 | ld8 r18=[r18] // r18 <- current->pending.signal | |
426 | .pred.rel.mutex p6,p7,p8 | |
427 | (p6) or r14=r3,r14 // SIG_BLOCK | |
428 | (p7) andcm r14=r3,r14 // SIG_UNBLOCK | |
429 | ||
430 | (p8) mov r14=r14 // SIG_SETMASK | |
431 | (p6) mov r8=0 // clear error code | |
432 | // recalc_sigpending() | |
433 | add r17=IA64_SIGNAL_GROUP_STOP_COUNT_OFFSET,r19 | |
434 | ||
435 | add r19=IA64_SIGNAL_SHARED_PENDING_OFFSET+IA64_SIGPENDING_SIGNAL_OFFSET,r19 | |
436 | ;; | |
437 | ld4 r17=[r17] // r17 <- current->signal->group_stop_count | |
438 | (p7) mov r8=0 // clear error code | |
439 | ||
440 | ld8 r19=[r19] // r19 <- current->signal->shared_pending | |
441 | ;; | |
442 | cmp4.gt p6,p7=r17,r0 // p6/p7 <- (current->signal->group_stop_count > 0)? | |
443 | (p8) mov r8=0 // clear error code | |
444 | ||
445 | or r18=r18,r19 // r18 <- current->pending | current->signal->shared_pending | |
446 | ;; | |
447 | // r18 <- (current->pending | current->signal->shared_pending) & ~current->blocked: | |
448 | andcm r18=r18,r14 | |
449 | add r9=TI_FLAGS+IA64_TASK_SIZE,r16 | |
450 | ;; | |
451 | ||
452 | (p7) cmp.ne.or.andcm p6,p7=r18,r0 // p6/p7 <- signal pending | |
453 | mov r19=0 // i must not leak kernel bits... | |
454 | (p6) br.cond.dpnt.many .sig_pending | |
455 | ;; | |
456 | ||
457 | 1: ld4 r17=[r9] // r17 <- current->thread_info->flags | |
458 | ;; | |
459 | mov ar.ccv=r17 | |
460 | and r18=~_TIF_SIGPENDING,r17 // r18 <- r17 & ~(1 << TIF_SIGPENDING) | |
461 | ;; | |
462 | ||
463 | st8 [r2]=r14 // update current->blocked with new mask | |
a2a64769 | 464 | cmpxchg4.acq r8=[r9],r18,ar.ccv // current->thread_info->flags <- r18 |
1da177e4 | 465 | ;; |
a2a64769 | 466 | cmp.ne p6,p0=r17,r8 // update failed? |
1da177e4 LT |
467 | (p6) br.cond.spnt.few 1b // yes -> retry |
468 | ||
469 | #ifdef CONFIG_SMP | |
470 | st4.rel [r31]=r0 // release the lock | |
471 | #endif | |
472 | ssm psr.i | |
473 | ;; | |
474 | ||
475 | srlz.d // ensure psr.i is set again | |
476 | mov r18=0 // i must not leak kernel bits... | |
477 | ||
478 | .store_mask: | |
479 | EX(.fail_efault, (p15) probe.w.fault r34, 3) // verify user has write-access to *oset | |
480 | EX(.fail_efault, (p15) st8 [r34]=r3) | |
481 | mov r2=0 // i must not leak kernel bits... | |
482 | mov r3=0 // i must not leak kernel bits... | |
483 | mov r8=0 // return 0 | |
484 | mov r9=0 // i must not leak kernel bits... | |
485 | mov r14=0 // i must not leak kernel bits... | |
486 | mov r17=0 // i must not leak kernel bits... | |
487 | mov r31=0 // i must not leak kernel bits... | |
488 | FSYS_RETURN | |
489 | ||
490 | .sig_pending: | |
491 | #ifdef CONFIG_SMP | |
492 | st4.rel [r31]=r0 // release the lock | |
493 | #endif | |
494 | ssm psr.i | |
495 | ;; | |
496 | srlz.d | |
497 | br.sptk.many fsys_fallback_syscall // with signal pending, do the heavy-weight syscall | |
498 | ||
499 | #ifdef CONFIG_SMP | |
500 | .lock_contention: | |
501 | /* Rather than spinning here, fall back on doing a heavy-weight syscall. */ | |
502 | ssm psr.i | |
503 | ;; | |
504 | srlz.d | |
505 | br.sptk.many fsys_fallback_syscall | |
506 | #endif | |
507 | END(fsys_rt_sigprocmask) | |
508 | ||
3bc207d2 FY |
509 | /* |
510 | * fsys_getcpu doesn't use the third parameter in this implementation. It reads | |
511 | * current_thread_info()->cpu and corresponding node in cpu_to_node_map. | |
512 | */ | |
513 | ENTRY(fsys_getcpu) | |
514 | .prologue | |
515 | .altrp b6 | |
516 | .body | |
517 | ;; | |
518 | add r2=TI_FLAGS+IA64_TASK_SIZE,r16 | |
519 | tnat.nz p6,p0 = r32 // guard against NaT argument | |
520 | add r3=TI_CPU+IA64_TASK_SIZE,r16 | |
521 | ;; | |
522 | ld4 r3=[r3] // M r3 = thread_info->cpu | |
523 | ld4 r2=[r2] // M r2 = thread_info->flags | |
524 | (p6) br.cond.spnt.few .fail_einval // B | |
525 | ;; | |
526 | tnat.nz p7,p0 = r33 // I guard against NaT argument | |
527 | (p7) br.cond.spnt.few .fail_einval // B | |
528 | #ifdef CONFIG_NUMA | |
529 | movl r17=cpu_to_node_map | |
530 | ;; | |
531 | EX(.fail_efault, probe.w.fault r32, 3) // M This takes 5 cycles | |
532 | EX(.fail_efault, probe.w.fault r33, 3) // M This takes 5 cycles | |
533 | shladd r18=r3,1,r17 | |
534 | ;; | |
535 | ld2 r20=[r18] // r20 = cpu_to_node_map[cpu] | |
536 | and r2 = TIF_ALLWORK_MASK,r2 | |
537 | ;; | |
538 | cmp.ne p8,p0=0,r2 | |
539 | (p8) br.spnt.many fsys_fallback_syscall | |
540 | ;; | |
541 | ;; | |
542 | EX(.fail_efault, st4 [r32] = r3) | |
543 | EX(.fail_efault, st2 [r33] = r20) | |
544 | mov r8=0 | |
545 | ;; | |
546 | #else | |
547 | EX(.fail_efault, probe.w.fault r32, 3) // M This takes 5 cycles | |
548 | EX(.fail_efault, probe.w.fault r33, 3) // M This takes 5 cycles | |
549 | and r2 = TIF_ALLWORK_MASK,r2 | |
550 | ;; | |
551 | cmp.ne p8,p0=0,r2 | |
552 | (p8) br.spnt.many fsys_fallback_syscall | |
553 | ;; | |
554 | EX(.fail_efault, st4 [r32] = r3) | |
555 | EX(.fail_efault, st2 [r33] = r0) | |
556 | mov r8=0 | |
557 | ;; | |
558 | #endif | |
559 | FSYS_RETURN | |
560 | END(fsys_getcpu) | |
561 | ||
1da177e4 LT |
562 | ENTRY(fsys_fallback_syscall) |
563 | .prologue | |
564 | .altrp b6 | |
565 | .body | |
566 | /* | |
567 | * We only get here from light-weight syscall handlers. Thus, we already | |
568 | * know that r15 contains a valid syscall number. No need to re-check. | |
569 | */ | |
570 | adds r17=-1024,r15 | |
571 | movl r14=sys_call_table | |
572 | ;; | |
573 | rsm psr.i | |
574 | shladd r18=r17,3,r14 | |
575 | ;; | |
576 | ld8 r18=[r18] // load normal (heavy-weight) syscall entry-point | |
577 | mov r29=psr // read psr (12 cyc load latency) | |
578 | mov r27=ar.rsc | |
579 | mov r21=ar.fpsr | |
580 | mov r26=ar.pfs | |
581 | END(fsys_fallback_syscall) | |
582 | /* FALL THROUGH */ | |
583 | GLOBAL_ENTRY(fsys_bubble_down) | |
584 | .prologue | |
585 | .altrp b6 | |
586 | .body | |
587 | /* | |
fbf7192b DMT |
588 | * We get here for syscalls that don't have a lightweight |
589 | * handler. For those, we need to bubble down into the kernel | |
590 | * and that requires setting up a minimal pt_regs structure, | |
591 | * and initializing the CPU state more or less as if an | |
592 | * interruption had occurred. To make syscall-restarts work, | |
593 | * we setup pt_regs such that cr_iip points to the second | |
594 | * instruction in syscall_via_break. Decrementing the IP | |
595 | * hence will restart the syscall via break and not | |
596 | * decrementing IP will return us to the caller, as usual. | |
597 | * Note that we preserve the value of psr.pp rather than | |
598 | * initializing it from dcr.pp. This makes it possible to | |
599 | * distinguish fsyscall execution from other privileged | |
600 | * execution. | |
1da177e4 LT |
601 | * |
602 | * On entry: | |
fbf7192b DMT |
603 | * - normal fsyscall handler register usage, except |
604 | * that we also have: | |
1da177e4 LT |
605 | * - r18: address of syscall entry point |
606 | * - r21: ar.fpsr | |
607 | * - r26: ar.pfs | |
608 | * - r27: ar.rsc | |
609 | * - r29: psr | |
fbf7192b DMT |
610 | * |
611 | * We used to clear some PSR bits here but that requires slow | |
612 | * serialization. Fortuntely, that isn't really necessary. | |
613 | * The rationale is as follows: we used to clear bits | |
614 | * ~PSR_PRESERVED_BITS in PSR.L. Since | |
615 | * PSR_PRESERVED_BITS==PSR.{UP,MFL,MFH,PK,DT,PP,SP,RT,IC}, we | |
616 | * ended up clearing PSR.{BE,AC,I,DFL,DFH,DI,DB,SI,TB}. | |
617 | * However, | |
618 | * | |
619 | * PSR.BE : already is turned off in __kernel_syscall_via_epc() | |
620 | * PSR.AC : don't care (kernel normally turns PSR.AC on) | |
621 | * PSR.I : already turned off by the time fsys_bubble_down gets | |
622 | * invoked | |
623 | * PSR.DFL: always 0 (kernel never turns it on) | |
624 | * PSR.DFH: don't care --- kernel never touches f32-f127 on its own | |
625 | * initiative | |
626 | * PSR.DI : always 0 (kernel never turns it on) | |
627 | * PSR.SI : always 0 (kernel never turns it on) | |
628 | * PSR.DB : don't care --- kernel never enables kernel-level | |
629 | * breakpoints | |
630 | * PSR.TB : must be 0 already; if it wasn't zero on entry to | |
631 | * __kernel_syscall_via_epc, the branch to fsys_bubble_down | |
632 | * will trigger a taken branch; the taken-trap-handler then | |
633 | * converts the syscall into a break-based system-call. | |
1da177e4 | 634 | */ |
1da177e4 | 635 | /* |
fbf7192b DMT |
636 | * Reading psr.l gives us only bits 0-31, psr.it, and psr.mc. |
637 | * The rest we have to synthesize. | |
1da177e4 | 638 | */ |
fbf7192b DMT |
639 | # define PSR_ONE_BITS ((3 << IA64_PSR_CPL0_BIT) \ |
640 | | (0x1 << IA64_PSR_RI_BIT) \ | |
1da177e4 LT |
641 | | IA64_PSR_BN | IA64_PSR_I) |
642 | ||
fbf7192b DMT |
643 | invala // M0|1 |
644 | movl r14=ia64_ret_from_syscall // X | |
1da177e4 | 645 | |
1ba7be7d | 646 | nop.m 0 |
fbf7192b | 647 | movl r28=__kernel_syscall_via_break // X create cr.iip |
1da177e4 | 648 | ;; |
1ba7be7d | 649 | |
fbf7192b DMT |
650 | mov r2=r16 // A get task addr to addl-addressable register |
651 | adds r16=IA64_TASK_THREAD_ON_USTACK_OFFSET,r16 // A | |
652 | mov r31=pr // I0 save pr (2 cyc) | |
1da177e4 | 653 | ;; |
fbf7192b DMT |
654 | st1 [r16]=r0 // M2|3 clear current->thread.on_ustack flag |
655 | addl r22=IA64_RBS_OFFSET,r2 // A compute base of RBS | |
656 | add r3=TI_FLAGS+IA64_TASK_SIZE,r2 // A | |
1da177e4 | 657 | ;; |
fbf7192b DMT |
658 | ld4 r3=[r3] // M0|1 r3 = current_thread_info()->flags |
659 | lfetch.fault.excl.nt1 [r22] // M0|1 prefetch register backing-store | |
1ba7be7d | 660 | nop.i 0 |
1da177e4 | 661 | ;; |
fbf7192b | 662 | mov ar.rsc=0 // M2 set enforced lazy mode, pl 0, LE, loadrs=0 |
1ba7be7d DMT |
663 | nop.m 0 |
664 | nop.i 0 | |
665 | ;; | |
fbf7192b DMT |
666 | mov r23=ar.bspstore // M2 (12 cyc) save ar.bspstore |
667 | mov.m r24=ar.rnat // M2 (5 cyc) read ar.rnat (dual-issues!) | |
1ba7be7d | 668 | nop.i 0 |
1da177e4 | 669 | ;; |
fbf7192b | 670 | mov ar.bspstore=r22 // M2 (6 cyc) switch to kernel RBS |
1ba7be7d | 671 | movl r8=PSR_ONE_BITS // X |
1da177e4 | 672 | ;; |
fbf7192b DMT |
673 | mov r25=ar.unat // M2 (5 cyc) save ar.unat |
674 | mov r19=b6 // I0 save b6 (2 cyc) | |
675 | mov r20=r1 // A save caller's gp in r20 | |
1ba7be7d | 676 | ;; |
fbf7192b DMT |
677 | or r29=r8,r29 // A construct cr.ipsr value to save |
678 | mov b6=r18 // I0 copy syscall entry-point to b6 (7 cyc) | |
679 | addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r2 // A compute base of memory stack | |
1ba7be7d | 680 | |
fbf7192b DMT |
681 | mov r18=ar.bsp // M2 save (kernel) ar.bsp (12 cyc) |
682 | cmp.ne pKStk,pUStk=r0,r0 // A set pKStk <- 0, pUStk <- 1 | |
683 | br.call.sptk.many b7=ia64_syscall_setup // B | |
1da177e4 | 684 | ;; |
fbf7192b DMT |
685 | mov ar.rsc=0x3 // M2 set eager mode, pl 0, LE, loadrs=0 |
686 | mov rp=r14 // I0 set the real return addr | |
ebcc80c1 | 687 | and r3=_TIF_SYSCALL_TRACEAUDIT,r3 // A |
1da177e4 | 688 | ;; |
fbf7192b | 689 | ssm psr.i // M2 we're on kernel stacks now, reenable irqs |
ebcc80c1 | 690 | cmp.eq p8,p0=r3,r0 // A |
fbf7192b | 691 | (p10) br.cond.spnt.many ia64_ret_from_syscall // B return if bad call-frame or r15 is a NaT |
1ba7be7d DMT |
692 | |
693 | nop.m 0 | |
fbf7192b DMT |
694 | (p8) br.call.sptk.many b6=b6 // B (ignore return address) |
695 | br.cond.spnt ia64_trace_syscall // B | |
1da177e4 LT |
696 | END(fsys_bubble_down) |
697 | ||
698 | .rodata | |
699 | .align 8 | |
700 | .globl fsyscall_table | |
701 | ||
702 | data8 fsys_bubble_down | |
703 | fsyscall_table: | |
704 | data8 fsys_ni_syscall | |
705 | data8 0 // exit // 1025 | |
706 | data8 0 // read | |
707 | data8 0 // write | |
708 | data8 0 // open | |
709 | data8 0 // close | |
710 | data8 0 // creat // 1030 | |
711 | data8 0 // link | |
712 | data8 0 // unlink | |
713 | data8 0 // execve | |
714 | data8 0 // chdir | |
715 | data8 0 // fchdir // 1035 | |
716 | data8 0 // utimes | |
717 | data8 0 // mknod | |
718 | data8 0 // chmod | |
719 | data8 0 // chown | |
720 | data8 0 // lseek // 1040 | |
721 | data8 fsys_getpid // getpid | |
722 | data8 fsys_getppid // getppid | |
723 | data8 0 // mount | |
724 | data8 0 // umount | |
725 | data8 0 // setuid // 1045 | |
726 | data8 0 // getuid | |
727 | data8 0 // geteuid | |
728 | data8 0 // ptrace | |
729 | data8 0 // access | |
730 | data8 0 // sync // 1050 | |
731 | data8 0 // fsync | |
732 | data8 0 // fdatasync | |
733 | data8 0 // kill | |
734 | data8 0 // rename | |
735 | data8 0 // mkdir // 1055 | |
736 | data8 0 // rmdir | |
737 | data8 0 // dup | |
738 | data8 0 // pipe | |
739 | data8 0 // times | |
740 | data8 0 // brk // 1060 | |
741 | data8 0 // setgid | |
742 | data8 0 // getgid | |
743 | data8 0 // getegid | |
744 | data8 0 // acct | |
745 | data8 0 // ioctl // 1065 | |
746 | data8 0 // fcntl | |
747 | data8 0 // umask | |
748 | data8 0 // chroot | |
749 | data8 0 // ustat | |
750 | data8 0 // dup2 // 1070 | |
751 | data8 0 // setreuid | |
752 | data8 0 // setregid | |
753 | data8 0 // getresuid | |
754 | data8 0 // setresuid | |
755 | data8 0 // getresgid // 1075 | |
756 | data8 0 // setresgid | |
757 | data8 0 // getgroups | |
758 | data8 0 // setgroups | |
759 | data8 0 // getpgid | |
760 | data8 0 // setpgid // 1080 | |
761 | data8 0 // setsid | |
762 | data8 0 // getsid | |
763 | data8 0 // sethostname | |
764 | data8 0 // setrlimit | |
765 | data8 0 // getrlimit // 1085 | |
766 | data8 0 // getrusage | |
767 | data8 fsys_gettimeofday // gettimeofday | |
768 | data8 0 // settimeofday | |
769 | data8 0 // select | |
770 | data8 0 // poll // 1090 | |
771 | data8 0 // symlink | |
772 | data8 0 // readlink | |
773 | data8 0 // uselib | |
774 | data8 0 // swapon | |
775 | data8 0 // swapoff // 1095 | |
776 | data8 0 // reboot | |
777 | data8 0 // truncate | |
778 | data8 0 // ftruncate | |
779 | data8 0 // fchmod | |
780 | data8 0 // fchown // 1100 | |
781 | data8 0 // getpriority | |
782 | data8 0 // setpriority | |
783 | data8 0 // statfs | |
784 | data8 0 // fstatfs | |
785 | data8 0 // gettid // 1105 | |
786 | data8 0 // semget | |
787 | data8 0 // semop | |
788 | data8 0 // semctl | |
789 | data8 0 // msgget | |
790 | data8 0 // msgsnd // 1110 | |
791 | data8 0 // msgrcv | |
792 | data8 0 // msgctl | |
793 | data8 0 // shmget | |
794 | data8 0 // shmat | |
795 | data8 0 // shmdt // 1115 | |
796 | data8 0 // shmctl | |
797 | data8 0 // syslog | |
798 | data8 0 // setitimer | |
799 | data8 0 // getitimer | |
800 | data8 0 // 1120 | |
801 | data8 0 | |
802 | data8 0 | |
803 | data8 0 // vhangup | |
804 | data8 0 // lchown | |
805 | data8 0 // remap_file_pages // 1125 | |
806 | data8 0 // wait4 | |
807 | data8 0 // sysinfo | |
808 | data8 0 // clone | |
809 | data8 0 // setdomainname | |
810 | data8 0 // newuname // 1130 | |
811 | data8 0 // adjtimex | |
812 | data8 0 | |
813 | data8 0 // init_module | |
814 | data8 0 // delete_module | |
815 | data8 0 // 1135 | |
816 | data8 0 | |
817 | data8 0 // quotactl | |
818 | data8 0 // bdflush | |
819 | data8 0 // sysfs | |
820 | data8 0 // personality // 1140 | |
821 | data8 0 // afs_syscall | |
822 | data8 0 // setfsuid | |
823 | data8 0 // setfsgid | |
824 | data8 0 // getdents | |
825 | data8 0 // flock // 1145 | |
826 | data8 0 // readv | |
827 | data8 0 // writev | |
828 | data8 0 // pread64 | |
829 | data8 0 // pwrite64 | |
830 | data8 0 // sysctl // 1150 | |
831 | data8 0 // mmap | |
832 | data8 0 // munmap | |
833 | data8 0 // mlock | |
834 | data8 0 // mlockall | |
835 | data8 0 // mprotect // 1155 | |
836 | data8 0 // mremap | |
837 | data8 0 // msync | |
838 | data8 0 // munlock | |
839 | data8 0 // munlockall | |
840 | data8 0 // sched_getparam // 1160 | |
841 | data8 0 // sched_setparam | |
842 | data8 0 // sched_getscheduler | |
843 | data8 0 // sched_setscheduler | |
844 | data8 0 // sched_yield | |
845 | data8 0 // sched_get_priority_max // 1165 | |
846 | data8 0 // sched_get_priority_min | |
847 | data8 0 // sched_rr_get_interval | |
848 | data8 0 // nanosleep | |
849 | data8 0 // nfsservctl | |
850 | data8 0 // prctl // 1170 | |
851 | data8 0 // getpagesize | |
852 | data8 0 // mmap2 | |
853 | data8 0 // pciconfig_read | |
854 | data8 0 // pciconfig_write | |
855 | data8 0 // perfmonctl // 1175 | |
856 | data8 0 // sigaltstack | |
857 | data8 0 // rt_sigaction | |
858 | data8 0 // rt_sigpending | |
859 | data8 fsys_rt_sigprocmask // rt_sigprocmask | |
860 | data8 0 // rt_sigqueueinfo // 1180 | |
861 | data8 0 // rt_sigreturn | |
862 | data8 0 // rt_sigsuspend | |
863 | data8 0 // rt_sigtimedwait | |
864 | data8 0 // getcwd | |
865 | data8 0 // capget // 1185 | |
866 | data8 0 // capset | |
867 | data8 0 // sendfile | |
868 | data8 0 | |
869 | data8 0 | |
870 | data8 0 // socket // 1190 | |
871 | data8 0 // bind | |
872 | data8 0 // connect | |
873 | data8 0 // listen | |
874 | data8 0 // accept | |
875 | data8 0 // getsockname // 1195 | |
876 | data8 0 // getpeername | |
877 | data8 0 // socketpair | |
878 | data8 0 // send | |
879 | data8 0 // sendto | |
880 | data8 0 // recv // 1200 | |
881 | data8 0 // recvfrom | |
882 | data8 0 // shutdown | |
883 | data8 0 // setsockopt | |
884 | data8 0 // getsockopt | |
885 | data8 0 // sendmsg // 1205 | |
886 | data8 0 // recvmsg | |
887 | data8 0 // pivot_root | |
888 | data8 0 // mincore | |
889 | data8 0 // madvise | |
890 | data8 0 // newstat // 1210 | |
891 | data8 0 // newlstat | |
892 | data8 0 // newfstat | |
893 | data8 0 // clone2 | |
894 | data8 0 // getdents64 | |
895 | data8 0 // getunwind // 1215 | |
896 | data8 0 // readahead | |
897 | data8 0 // setxattr | |
898 | data8 0 // lsetxattr | |
899 | data8 0 // fsetxattr | |
900 | data8 0 // getxattr // 1220 | |
901 | data8 0 // lgetxattr | |
902 | data8 0 // fgetxattr | |
903 | data8 0 // listxattr | |
904 | data8 0 // llistxattr | |
905 | data8 0 // flistxattr // 1225 | |
906 | data8 0 // removexattr | |
907 | data8 0 // lremovexattr | |
908 | data8 0 // fremovexattr | |
909 | data8 0 // tkill | |
910 | data8 0 // futex // 1230 | |
911 | data8 0 // sched_setaffinity | |
912 | data8 0 // sched_getaffinity | |
913 | data8 fsys_set_tid_address // set_tid_address | |
914 | data8 0 // fadvise64_64 | |
915 | data8 0 // tgkill // 1235 | |
916 | data8 0 // exit_group | |
917 | data8 0 // lookup_dcookie | |
918 | data8 0 // io_setup | |
919 | data8 0 // io_destroy | |
920 | data8 0 // io_getevents // 1240 | |
921 | data8 0 // io_submit | |
922 | data8 0 // io_cancel | |
923 | data8 0 // epoll_create | |
924 | data8 0 // epoll_ctl | |
925 | data8 0 // epoll_wait // 1245 | |
926 | data8 0 // restart_syscall | |
927 | data8 0 // semtimedop | |
928 | data8 0 // timer_create | |
929 | data8 0 // timer_settime | |
930 | data8 0 // timer_gettime // 1250 | |
931 | data8 0 // timer_getoverrun | |
932 | data8 0 // timer_delete | |
933 | data8 0 // clock_settime | |
934 | data8 fsys_clock_gettime // clock_gettime | |
3bc207d2 FY |
935 | data8 0 // clock_getres // 1255 |
936 | data8 0 // clock_nanosleep | |
937 | data8 0 // fstatfs64 | |
938 | data8 0 // statfs64 | |
939 | data8 0 // mbind | |
940 | data8 0 // get_mempolicy // 1260 | |
941 | data8 0 // set_mempolicy | |
942 | data8 0 // mq_open | |
943 | data8 0 // mq_unlink | |
944 | data8 0 // mq_timedsend | |
945 | data8 0 // mq_timedreceive // 1265 | |
946 | data8 0 // mq_notify | |
947 | data8 0 // mq_getsetattr | |
948 | data8 0 // kexec_load | |
949 | data8 0 // vserver | |
950 | data8 0 // waitid // 1270 | |
951 | data8 0 // add_key | |
952 | data8 0 // request_key | |
953 | data8 0 // keyctl | |
954 | data8 0 // ioprio_set | |
955 | data8 0 // ioprio_get // 1275 | |
956 | data8 0 // move_pages | |
957 | data8 0 // inotify_init | |
958 | data8 0 // inotify_add_watch | |
959 | data8 0 // inotify_rm_watch | |
960 | data8 0 // migrate_pages // 1280 | |
961 | data8 0 // openat | |
962 | data8 0 // mkdirat | |
963 | data8 0 // mknodat | |
964 | data8 0 // fchownat | |
965 | data8 0 // futimesat // 1285 | |
966 | data8 0 // newfstatat | |
967 | data8 0 // unlinkat | |
968 | data8 0 // renameat | |
969 | data8 0 // linkat | |
970 | data8 0 // symlinkat // 1290 | |
971 | data8 0 // readlinkat | |
972 | data8 0 // fchmodat | |
973 | data8 0 // faccessat | |
974 | data8 0 | |
975 | data8 0 // 1295 | |
976 | data8 0 // unshare | |
977 | data8 0 // splice | |
978 | data8 0 // set_robust_list | |
979 | data8 0 // get_robust_list | |
980 | data8 0 // sync_file_range // 1300 | |
981 | data8 0 // tee | |
982 | data8 0 // vmsplice | |
983 | data8 0 | |
984 | data8 fsys_getcpu // getcpu // 1304 | |
9ed2ad86 | 985 | |
c8c1635f KC |
986 | // fill in zeros for the remaining entries |
987 | .zero: | |
988 | .space fsyscall_table + 8*NR_syscalls - .zero, 0 |