Commit | Line | Data |
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1da177e4 | 1 | /* |
f30c2269 | 2 | * arch/ia64/kernel/entry.S |
1da177e4 LT |
3 | * |
4 | * Kernel entry points. | |
5 | * | |
6 | * Copyright (C) 1998-2003, 2005 Hewlett-Packard Co | |
7 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
8 | * Copyright (C) 1999, 2002-2003 | |
9 | * Asit Mallick <Asit.K.Mallick@intel.com> | |
10 | * Don Dugger <Don.Dugger@intel.com> | |
11 | * Suresh Siddha <suresh.b.siddha@intel.com> | |
12 | * Fenghua Yu <fenghua.yu@intel.com> | |
13 | * Copyright (C) 1999 VA Linux Systems | |
14 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> | |
15 | */ | |
16 | /* | |
17 | * ia64_switch_to now places correct virtual mapping in in TR2 for | |
18 | * kernel stack. This allows us to handle interrupts without changing | |
19 | * to physical mode. | |
20 | * | |
21 | * Jonathan Nicklin <nicklin@missioncriticallinux.com> | |
22 | * Patrick O'Rourke <orourke@missioncriticallinux.com> | |
23 | * 11/07/2000 | |
24 | */ | |
4df8d22b IY |
25 | /* |
26 | * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp> | |
27 | * VA Linux Systems Japan K.K. | |
28 | * pv_ops. | |
29 | */ | |
1da177e4 LT |
30 | /* |
31 | * Global (preserved) predicate usage on syscall entry/exit path: | |
32 | * | |
33 | * pKStk: See entry.h. | |
34 | * pUStk: See entry.h. | |
35 | * pSys: See entry.h. | |
36 | * pNonSys: !pSys | |
37 | */ | |
38 | ||
1da177e4 LT |
39 | |
40 | #include <asm/asmmacro.h> | |
41 | #include <asm/cache.h> | |
42 | #include <asm/errno.h> | |
43 | #include <asm/kregs.h> | |
39e01cb8 | 44 | #include <asm/asm-offsets.h> |
1da177e4 LT |
45 | #include <asm/pgtable.h> |
46 | #include <asm/percpu.h> | |
47 | #include <asm/processor.h> | |
48 | #include <asm/thread_info.h> | |
49 | #include <asm/unistd.h> | |
50 | ||
51 | #include "minstate.h" | |
52 | ||
4df8d22b | 53 | #ifdef __IA64_ASM_PARAVIRTUALIZED_NATIVE |
1da177e4 LT |
54 | /* |
55 | * execve() is special because in case of success, we need to | |
56 | * setup a null register window frame. | |
57 | */ | |
58 | ENTRY(ia64_execve) | |
59 | /* | |
60 | * Allocate 8 input registers since ptrace() may clobber them | |
61 | */ | |
62 | .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8) | |
63 | alloc loc1=ar.pfs,8,2,4,0 | |
64 | mov loc0=rp | |
65 | .body | |
66 | mov out0=in0 // filename | |
67 | ;; // stop bit between alloc and call | |
68 | mov out1=in1 // argv | |
69 | mov out2=in2 // envp | |
70 | add out3=16,sp // regs | |
71 | br.call.sptk.many rp=sys_execve | |
72 | .ret0: | |
73 | #ifdef CONFIG_IA32_SUPPORT | |
74 | /* | |
75 | * Check if we're returning to ia32 mode. If so, we need to restore ia32 registers | |
76 | * from pt_regs. | |
77 | */ | |
78 | adds r16=PT(CR_IPSR)+16,sp | |
79 | ;; | |
80 | ld8 r16=[r16] | |
81 | #endif | |
82 | cmp4.ge p6,p7=r8,r0 | |
83 | mov ar.pfs=loc1 // restore ar.pfs | |
84 | sxt4 r8=r8 // return 64-bit result | |
85 | ;; | |
86 | stf.spill [sp]=f0 | |
87 | (p6) cmp.ne pKStk,pUStk=r0,r0 // a successful execve() lands us in user-mode... | |
88 | mov rp=loc0 | |
89 | (p6) mov ar.pfs=r0 // clear ar.pfs on success | |
90 | (p7) br.ret.sptk.many rp | |
91 | ||
92 | /* | |
93 | * In theory, we'd have to zap this state only to prevent leaking of | |
94 | * security sensitive state (e.g., if current->mm->dumpable is zero). However, | |
95 | * this executes in less than 20 cycles even on Itanium, so it's not worth | |
96 | * optimizing for...). | |
97 | */ | |
98 | mov ar.unat=0; mov ar.lc=0 | |
99 | mov r4=0; mov f2=f0; mov b1=r0 | |
100 | mov r5=0; mov f3=f0; mov b2=r0 | |
101 | mov r6=0; mov f4=f0; mov b3=r0 | |
102 | mov r7=0; mov f5=f0; mov b4=r0 | |
103 | ldf.fill f12=[sp]; mov f13=f0; mov b5=r0 | |
104 | ldf.fill f14=[sp]; ldf.fill f15=[sp]; mov f16=f0 | |
105 | ldf.fill f17=[sp]; ldf.fill f18=[sp]; mov f19=f0 | |
106 | ldf.fill f20=[sp]; ldf.fill f21=[sp]; mov f22=f0 | |
107 | ldf.fill f23=[sp]; ldf.fill f24=[sp]; mov f25=f0 | |
108 | ldf.fill f26=[sp]; ldf.fill f27=[sp]; mov f28=f0 | |
109 | ldf.fill f29=[sp]; ldf.fill f30=[sp]; mov f31=f0 | |
110 | #ifdef CONFIG_IA32_SUPPORT | |
111 | tbit.nz p6,p0=r16, IA64_PSR_IS_BIT | |
112 | movl loc0=ia64_ret_from_ia32_execve | |
113 | ;; | |
114 | (p6) mov rp=loc0 | |
115 | #endif | |
116 | br.ret.sptk.many rp | |
117 | END(ia64_execve) | |
118 | ||
119 | /* | |
120 | * sys_clone2(u64 flags, u64 ustack_base, u64 ustack_size, u64 parent_tidptr, u64 child_tidptr, | |
121 | * u64 tls) | |
122 | */ | |
123 | GLOBAL_ENTRY(sys_clone2) | |
124 | /* | |
125 | * Allocate 8 input registers since ptrace() may clobber them | |
126 | */ | |
127 | .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8) | |
128 | alloc r16=ar.pfs,8,2,6,0 | |
129 | DO_SAVE_SWITCH_STACK | |
130 | adds r2=PT(R16)+IA64_SWITCH_STACK_SIZE+16,sp | |
131 | mov loc0=rp | |
132 | mov loc1=r16 // save ar.pfs across do_fork | |
133 | .body | |
134 | mov out1=in1 | |
135 | mov out3=in2 | |
136 | tbit.nz p6,p0=in0,CLONE_SETTLS_BIT | |
137 | mov out4=in3 // parent_tidptr: valid only w/CLONE_PARENT_SETTID | |
138 | ;; | |
139 | (p6) st8 [r2]=in5 // store TLS in r16 for copy_thread() | |
140 | mov out5=in4 // child_tidptr: valid only w/CLONE_CHILD_SETTID or CLONE_CHILD_CLEARTID | |
141 | adds out2=IA64_SWITCH_STACK_SIZE+16,sp // out2 = ®s | |
142 | mov out0=in0 // out0 = clone_flags | |
143 | br.call.sptk.many rp=do_fork | |
144 | .ret1: .restore sp | |
145 | adds sp=IA64_SWITCH_STACK_SIZE,sp // pop the switch stack | |
146 | mov ar.pfs=loc1 | |
147 | mov rp=loc0 | |
148 | br.ret.sptk.many rp | |
149 | END(sys_clone2) | |
150 | ||
151 | /* | |
152 | * sys_clone(u64 flags, u64 ustack_base, u64 parent_tidptr, u64 child_tidptr, u64 tls) | |
153 | * Deprecated. Use sys_clone2() instead. | |
154 | */ | |
155 | GLOBAL_ENTRY(sys_clone) | |
156 | /* | |
157 | * Allocate 8 input registers since ptrace() may clobber them | |
158 | */ | |
159 | .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8) | |
160 | alloc r16=ar.pfs,8,2,6,0 | |
161 | DO_SAVE_SWITCH_STACK | |
162 | adds r2=PT(R16)+IA64_SWITCH_STACK_SIZE+16,sp | |
163 | mov loc0=rp | |
164 | mov loc1=r16 // save ar.pfs across do_fork | |
165 | .body | |
166 | mov out1=in1 | |
167 | mov out3=16 // stacksize (compensates for 16-byte scratch area) | |
168 | tbit.nz p6,p0=in0,CLONE_SETTLS_BIT | |
169 | mov out4=in2 // parent_tidptr: valid only w/CLONE_PARENT_SETTID | |
170 | ;; | |
171 | (p6) st8 [r2]=in4 // store TLS in r13 (tp) | |
172 | mov out5=in3 // child_tidptr: valid only w/CLONE_CHILD_SETTID or CLONE_CHILD_CLEARTID | |
173 | adds out2=IA64_SWITCH_STACK_SIZE+16,sp // out2 = ®s | |
174 | mov out0=in0 // out0 = clone_flags | |
175 | br.call.sptk.many rp=do_fork | |
176 | .ret2: .restore sp | |
177 | adds sp=IA64_SWITCH_STACK_SIZE,sp // pop the switch stack | |
178 | mov ar.pfs=loc1 | |
179 | mov rp=loc0 | |
180 | br.ret.sptk.many rp | |
181 | END(sys_clone) | |
4df8d22b | 182 | #endif /* __IA64_ASM_PARAVIRTUALIZED_NATIVE */ |
1da177e4 LT |
183 | |
184 | /* | |
185 | * prev_task <- ia64_switch_to(struct task_struct *next) | |
186 | * With Ingo's new scheduler, interrupts are disabled when this routine gets | |
187 | * called. The code starting at .map relies on this. The rest of the code | |
188 | * doesn't care about the interrupt masking status. | |
189 | */ | |
4df8d22b | 190 | GLOBAL_ENTRY(__paravirt_switch_to) |
1da177e4 LT |
191 | .prologue |
192 | alloc r16=ar.pfs,1,0,0,0 | |
193 | DO_SAVE_SWITCH_STACK | |
194 | .body | |
195 | ||
196 | adds r22=IA64_TASK_THREAD_KSP_OFFSET,r13 | |
197 | movl r25=init_task | |
198 | mov r27=IA64_KR(CURRENT_STACK) | |
199 | adds r21=IA64_TASK_THREAD_KSP_OFFSET,in0 | |
200 | dep r20=0,in0,61,3 // physical address of "next" | |
201 | ;; | |
202 | st8 [r22]=sp // save kernel stack pointer of old task | |
203 | shr.u r26=r20,IA64_GRANULE_SHIFT | |
204 | cmp.eq p7,p6=r25,in0 | |
205 | ;; | |
206 | /* | |
207 | * If we've already mapped this task's page, we can skip doing it again. | |
208 | */ | |
209 | (p6) cmp.eq p7,p6=r26,r27 | |
210 | (p6) br.cond.dpnt .map | |
211 | ;; | |
212 | .done: | |
1da177e4 | 213 | ld8 sp=[r21] // load kernel stack pointer of new task |
4df8d22b | 214 | MOV_TO_KR(CURRENT, in0, r8, r9) // update "current" application register |
1da177e4 LT |
215 | mov r8=r13 // return pointer to previously running task |
216 | mov r13=in0 // set "current" pointer | |
217 | ;; | |
218 | DO_LOAD_SWITCH_STACK | |
219 | ||
220 | #ifdef CONFIG_SMP | |
221 | sync.i // ensure "fc"s done by this CPU are visible on other CPUs | |
222 | #endif | |
223 | br.ret.sptk.many rp // boogie on out in new context | |
224 | ||
225 | .map: | |
4df8d22b | 226 | RSM_PSR_IC(r25) // interrupts (psr.i) are already disabled here |
1da177e4 LT |
227 | movl r25=PAGE_KERNEL |
228 | ;; | |
229 | srlz.d | |
230 | or r23=r25,r20 // construct PA | page properties | |
231 | mov r25=IA64_GRANULE_SHIFT<<2 | |
232 | ;; | |
4df8d22b IY |
233 | MOV_TO_ITIR(p0, r25, r8) |
234 | MOV_TO_IFA(in0, r8) // VA of next task... | |
1da177e4 LT |
235 | ;; |
236 | mov r25=IA64_TR_CURRENT_STACK | |
4df8d22b | 237 | MOV_TO_KR(CURRENT_STACK, r26, r8, r9) // remember last page we mapped... |
1da177e4 LT |
238 | ;; |
239 | itr.d dtr[r25]=r23 // wire in new mapping... | |
4df8d22b | 240 | SSM_PSR_IC_AND_SRLZ_D(r8, r9) // reenable the psr.ic bit |
1da177e4 | 241 | br.cond.sptk .done |
4df8d22b | 242 | END(__paravirt_switch_to) |
1da177e4 | 243 | |
4df8d22b | 244 | #ifdef __IA64_ASM_PARAVIRTUALIZED_NATIVE |
1da177e4 LT |
245 | /* |
246 | * Note that interrupts are enabled during save_switch_stack and load_switch_stack. This | |
247 | * means that we may get an interrupt with "sp" pointing to the new kernel stack while | |
248 | * ar.bspstore is still pointing to the old kernel backing store area. Since ar.rsc, | |
249 | * ar.rnat, ar.bsp, and ar.bspstore are all preserved by interrupts, this is not a | |
250 | * problem. Also, we don't need to specify unwind information for preserved registers | |
251 | * that are not modified in save_switch_stack as the right unwind information is already | |
252 | * specified at the call-site of save_switch_stack. | |
253 | */ | |
254 | ||
255 | /* | |
256 | * save_switch_stack: | |
257 | * - r16 holds ar.pfs | |
258 | * - b7 holds address to return to | |
259 | * - rp (b0) holds return address to save | |
260 | */ | |
261 | GLOBAL_ENTRY(save_switch_stack) | |
262 | .prologue | |
263 | .altrp b7 | |
264 | flushrs // flush dirty regs to backing store (must be first in insn group) | |
265 | .save @priunat,r17 | |
266 | mov r17=ar.unat // preserve caller's | |
267 | .body | |
268 | #ifdef CONFIG_ITANIUM | |
269 | adds r2=16+128,sp | |
270 | adds r3=16+64,sp | |
271 | adds r14=SW(R4)+16,sp | |
272 | ;; | |
273 | st8.spill [r14]=r4,16 // spill r4 | |
274 | lfetch.fault.excl.nt1 [r3],128 | |
275 | ;; | |
276 | lfetch.fault.excl.nt1 [r2],128 | |
277 | lfetch.fault.excl.nt1 [r3],128 | |
278 | ;; | |
279 | lfetch.fault.excl [r2] | |
280 | lfetch.fault.excl [r3] | |
281 | adds r15=SW(R5)+16,sp | |
282 | #else | |
283 | add r2=16+3*128,sp | |
284 | add r3=16,sp | |
285 | add r14=SW(R4)+16,sp | |
286 | ;; | |
287 | st8.spill [r14]=r4,SW(R6)-SW(R4) // spill r4 and prefetch offset 0x1c0 | |
288 | lfetch.fault.excl.nt1 [r3],128 // prefetch offset 0x010 | |
289 | ;; | |
290 | lfetch.fault.excl.nt1 [r3],128 // prefetch offset 0x090 | |
291 | lfetch.fault.excl.nt1 [r2],128 // prefetch offset 0x190 | |
292 | ;; | |
293 | lfetch.fault.excl.nt1 [r3] // prefetch offset 0x110 | |
294 | lfetch.fault.excl.nt1 [r2] // prefetch offset 0x210 | |
295 | adds r15=SW(R5)+16,sp | |
296 | #endif | |
297 | ;; | |
298 | st8.spill [r15]=r5,SW(R7)-SW(R5) // spill r5 | |
299 | mov.m ar.rsc=0 // put RSE in mode: enforced lazy, little endian, pl 0 | |
300 | add r2=SW(F2)+16,sp // r2 = &sw->f2 | |
301 | ;; | |
302 | st8.spill [r14]=r6,SW(B0)-SW(R6) // spill r6 | |
303 | mov.m r18=ar.fpsr // preserve fpsr | |
304 | add r3=SW(F3)+16,sp // r3 = &sw->f3 | |
305 | ;; | |
306 | stf.spill [r2]=f2,32 | |
307 | mov.m r19=ar.rnat | |
308 | mov r21=b0 | |
309 | ||
310 | stf.spill [r3]=f3,32 | |
311 | st8.spill [r15]=r7,SW(B2)-SW(R7) // spill r7 | |
312 | mov r22=b1 | |
313 | ;; | |
314 | // since we're done with the spills, read and save ar.unat: | |
315 | mov.m r29=ar.unat | |
316 | mov.m r20=ar.bspstore | |
317 | mov r23=b2 | |
318 | stf.spill [r2]=f4,32 | |
319 | stf.spill [r3]=f5,32 | |
320 | mov r24=b3 | |
321 | ;; | |
322 | st8 [r14]=r21,SW(B1)-SW(B0) // save b0 | |
323 | st8 [r15]=r23,SW(B3)-SW(B2) // save b2 | |
324 | mov r25=b4 | |
325 | mov r26=b5 | |
326 | ;; | |
327 | st8 [r14]=r22,SW(B4)-SW(B1) // save b1 | |
328 | st8 [r15]=r24,SW(AR_PFS)-SW(B3) // save b3 | |
329 | mov r21=ar.lc // I-unit | |
330 | stf.spill [r2]=f12,32 | |
331 | stf.spill [r3]=f13,32 | |
332 | ;; | |
333 | st8 [r14]=r25,SW(B5)-SW(B4) // save b4 | |
334 | st8 [r15]=r16,SW(AR_LC)-SW(AR_PFS) // save ar.pfs | |
335 | stf.spill [r2]=f14,32 | |
336 | stf.spill [r3]=f15,32 | |
337 | ;; | |
338 | st8 [r14]=r26 // save b5 | |
339 | st8 [r15]=r21 // save ar.lc | |
340 | stf.spill [r2]=f16,32 | |
341 | stf.spill [r3]=f17,32 | |
342 | ;; | |
343 | stf.spill [r2]=f18,32 | |
344 | stf.spill [r3]=f19,32 | |
345 | ;; | |
346 | stf.spill [r2]=f20,32 | |
347 | stf.spill [r3]=f21,32 | |
348 | ;; | |
349 | stf.spill [r2]=f22,32 | |
350 | stf.spill [r3]=f23,32 | |
351 | ;; | |
352 | stf.spill [r2]=f24,32 | |
353 | stf.spill [r3]=f25,32 | |
354 | ;; | |
355 | stf.spill [r2]=f26,32 | |
356 | stf.spill [r3]=f27,32 | |
357 | ;; | |
358 | stf.spill [r2]=f28,32 | |
359 | stf.spill [r3]=f29,32 | |
360 | ;; | |
361 | stf.spill [r2]=f30,SW(AR_UNAT)-SW(F30) | |
362 | stf.spill [r3]=f31,SW(PR)-SW(F31) | |
363 | add r14=SW(CALLER_UNAT)+16,sp | |
364 | ;; | |
365 | st8 [r2]=r29,SW(AR_RNAT)-SW(AR_UNAT) // save ar.unat | |
366 | st8 [r14]=r17,SW(AR_FPSR)-SW(CALLER_UNAT) // save caller_unat | |
367 | mov r21=pr | |
368 | ;; | |
369 | st8 [r2]=r19,SW(AR_BSPSTORE)-SW(AR_RNAT) // save ar.rnat | |
370 | st8 [r3]=r21 // save predicate registers | |
371 | ;; | |
372 | st8 [r2]=r20 // save ar.bspstore | |
373 | st8 [r14]=r18 // save fpsr | |
374 | mov ar.rsc=3 // put RSE back into eager mode, pl 0 | |
375 | br.cond.sptk.many b7 | |
376 | END(save_switch_stack) | |
377 | ||
378 | /* | |
379 | * load_switch_stack: | |
380 | * - "invala" MUST be done at call site (normally in DO_LOAD_SWITCH_STACK) | |
381 | * - b7 holds address to return to | |
382 | * - must not touch r8-r11 | |
383 | */ | |
4df8d22b | 384 | GLOBAL_ENTRY(load_switch_stack) |
1da177e4 LT |
385 | .prologue |
386 | .altrp b7 | |
387 | ||
388 | .body | |
389 | lfetch.fault.nt1 [sp] | |
390 | adds r2=SW(AR_BSPSTORE)+16,sp | |
391 | adds r3=SW(AR_UNAT)+16,sp | |
392 | mov ar.rsc=0 // put RSE into enforced lazy mode | |
393 | adds r14=SW(CALLER_UNAT)+16,sp | |
394 | adds r15=SW(AR_FPSR)+16,sp | |
395 | ;; | |
396 | ld8 r27=[r2],(SW(B0)-SW(AR_BSPSTORE)) // bspstore | |
397 | ld8 r29=[r3],(SW(B1)-SW(AR_UNAT)) // unat | |
398 | ;; | |
399 | ld8 r21=[r2],16 // restore b0 | |
400 | ld8 r22=[r3],16 // restore b1 | |
401 | ;; | |
402 | ld8 r23=[r2],16 // restore b2 | |
403 | ld8 r24=[r3],16 // restore b3 | |
404 | ;; | |
405 | ld8 r25=[r2],16 // restore b4 | |
406 | ld8 r26=[r3],16 // restore b5 | |
407 | ;; | |
408 | ld8 r16=[r2],(SW(PR)-SW(AR_PFS)) // ar.pfs | |
409 | ld8 r17=[r3],(SW(AR_RNAT)-SW(AR_LC)) // ar.lc | |
410 | ;; | |
411 | ld8 r28=[r2] // restore pr | |
412 | ld8 r30=[r3] // restore rnat | |
413 | ;; | |
414 | ld8 r18=[r14],16 // restore caller's unat | |
415 | ld8 r19=[r15],24 // restore fpsr | |
416 | ;; | |
417 | ldf.fill f2=[r14],32 | |
418 | ldf.fill f3=[r15],32 | |
419 | ;; | |
420 | ldf.fill f4=[r14],32 | |
421 | ldf.fill f5=[r15],32 | |
422 | ;; | |
423 | ldf.fill f12=[r14],32 | |
424 | ldf.fill f13=[r15],32 | |
425 | ;; | |
426 | ldf.fill f14=[r14],32 | |
427 | ldf.fill f15=[r15],32 | |
428 | ;; | |
429 | ldf.fill f16=[r14],32 | |
430 | ldf.fill f17=[r15],32 | |
431 | ;; | |
432 | ldf.fill f18=[r14],32 | |
433 | ldf.fill f19=[r15],32 | |
434 | mov b0=r21 | |
435 | ;; | |
436 | ldf.fill f20=[r14],32 | |
437 | ldf.fill f21=[r15],32 | |
438 | mov b1=r22 | |
439 | ;; | |
440 | ldf.fill f22=[r14],32 | |
441 | ldf.fill f23=[r15],32 | |
442 | mov b2=r23 | |
443 | ;; | |
444 | mov ar.bspstore=r27 | |
445 | mov ar.unat=r29 // establish unat holding the NaT bits for r4-r7 | |
446 | mov b3=r24 | |
447 | ;; | |
448 | ldf.fill f24=[r14],32 | |
449 | ldf.fill f25=[r15],32 | |
450 | mov b4=r25 | |
451 | ;; | |
452 | ldf.fill f26=[r14],32 | |
453 | ldf.fill f27=[r15],32 | |
454 | mov b5=r26 | |
455 | ;; | |
456 | ldf.fill f28=[r14],32 | |
457 | ldf.fill f29=[r15],32 | |
458 | mov ar.pfs=r16 | |
459 | ;; | |
460 | ldf.fill f30=[r14],32 | |
461 | ldf.fill f31=[r15],24 | |
462 | mov ar.lc=r17 | |
463 | ;; | |
464 | ld8.fill r4=[r14],16 | |
465 | ld8.fill r5=[r15],16 | |
466 | mov pr=r28,-1 | |
467 | ;; | |
468 | ld8.fill r6=[r14],16 | |
469 | ld8.fill r7=[r15],16 | |
470 | ||
471 | mov ar.unat=r18 // restore caller's unat | |
472 | mov ar.rnat=r30 // must restore after bspstore but before rsc! | |
473 | mov ar.fpsr=r19 // restore fpsr | |
474 | mov ar.rsc=3 // put RSE back into eager mode, pl 0 | |
475 | br.cond.sptk.many b7 | |
476 | END(load_switch_stack) | |
477 | ||
383f2835 KC |
478 | GLOBAL_ENTRY(prefetch_stack) |
479 | add r14 = -IA64_SWITCH_STACK_SIZE, sp | |
480 | add r15 = IA64_TASK_THREAD_KSP_OFFSET, in0 | |
481 | ;; | |
482 | ld8 r16 = [r15] // load next's stack pointer | |
483 | lfetch.fault.excl [r14], 128 | |
484 | ;; | |
485 | lfetch.fault.excl [r14], 128 | |
486 | lfetch.fault [r16], 128 | |
487 | ;; | |
488 | lfetch.fault.excl [r14], 128 | |
489 | lfetch.fault [r16], 128 | |
490 | ;; | |
491 | lfetch.fault.excl [r14], 128 | |
492 | lfetch.fault [r16], 128 | |
493 | ;; | |
494 | lfetch.fault.excl [r14], 128 | |
495 | lfetch.fault [r16], 128 | |
496 | ;; | |
497 | lfetch.fault [r16], 128 | |
498 | br.ret.sptk.many rp | |
24b8e0cc | 499 | END(prefetch_stack) |
383f2835 | 500 | |
3db03b4a | 501 | GLOBAL_ENTRY(kernel_execve) |
b704882e | 502 | rum psr.ac |
1da177e4 LT |
503 | mov r15=__NR_execve // put syscall number in place |
504 | break __BREAK_SYSCALL | |
505 | br.ret.sptk.many rp | |
3db03b4a | 506 | END(kernel_execve) |
1da177e4 LT |
507 | |
508 | GLOBAL_ENTRY(clone) | |
509 | mov r15=__NR_clone // put syscall number in place | |
510 | break __BREAK_SYSCALL | |
511 | br.ret.sptk.many rp | |
512 | END(clone) | |
513 | ||
514 | /* | |
515 | * Invoke a system call, but do some tracing before and after the call. | |
516 | * We MUST preserve the current register frame throughout this routine | |
517 | * because some system calls (such as ia64_execve) directly | |
518 | * manipulate ar.pfs. | |
519 | */ | |
520 | GLOBAL_ENTRY(ia64_trace_syscall) | |
521 | PT_REGS_UNWIND_INFO(0) | |
522 | /* | |
523 | * We need to preserve the scratch registers f6-f11 in case the system | |
524 | * call is sigreturn. | |
525 | */ | |
526 | adds r16=PT(F6)+16,sp | |
527 | adds r17=PT(F7)+16,sp | |
528 | ;; | |
529 | stf.spill [r16]=f6,32 | |
530 | stf.spill [r17]=f7,32 | |
531 | ;; | |
532 | stf.spill [r16]=f8,32 | |
533 | stf.spill [r17]=f9,32 | |
534 | ;; | |
535 | stf.spill [r16]=f10 | |
536 | stf.spill [r17]=f11 | |
537 | br.call.sptk.many rp=syscall_trace_enter // give parent a chance to catch syscall args | |
f14488cc SL |
538 | cmp.lt p6,p0=r8,r0 // check tracehook |
539 | adds r2=PT(R8)+16,sp // r2 = &pt_regs.r8 | |
540 | adds r3=PT(R10)+16,sp // r3 = &pt_regs.r10 | |
541 | mov r10=0 | |
542 | (p6) br.cond.sptk strace_error // syscall failed -> | |
1da177e4 LT |
543 | adds r16=PT(F6)+16,sp |
544 | adds r17=PT(F7)+16,sp | |
545 | ;; | |
546 | ldf.fill f6=[r16],32 | |
547 | ldf.fill f7=[r17],32 | |
548 | ;; | |
549 | ldf.fill f8=[r16],32 | |
550 | ldf.fill f9=[r17],32 | |
551 | ;; | |
552 | ldf.fill f10=[r16] | |
553 | ldf.fill f11=[r17] | |
554 | // the syscall number may have changed, so re-load it and re-calculate the | |
555 | // syscall entry-point: | |
556 | adds r15=PT(R15)+16,sp // r15 = &pt_regs.r15 (syscall #) | |
557 | ;; | |
558 | ld8 r15=[r15] | |
559 | mov r3=NR_syscalls - 1 | |
560 | ;; | |
561 | adds r15=-1024,r15 | |
562 | movl r16=sys_call_table | |
563 | ;; | |
564 | shladd r20=r15,3,r16 // r20 = sys_call_table + 8*(syscall-1024) | |
565 | cmp.leu p6,p7=r15,r3 | |
566 | ;; | |
567 | (p6) ld8 r20=[r20] // load address of syscall entry point | |
568 | (p7) movl r20=sys_ni_syscall | |
569 | ;; | |
570 | mov b6=r20 | |
571 | br.call.sptk.many rp=b6 // do the syscall | |
572 | .strace_check_retval: | |
573 | cmp.lt p6,p0=r8,r0 // syscall failed? | |
574 | adds r2=PT(R8)+16,sp // r2 = &pt_regs.r8 | |
575 | adds r3=PT(R10)+16,sp // r3 = &pt_regs.r10 | |
576 | mov r10=0 | |
577 | (p6) br.cond.sptk strace_error // syscall failed -> | |
578 | ;; // avoid RAW on r10 | |
579 | .strace_save_retval: | |
580 | .mem.offset 0,0; st8.spill [r2]=r8 // store return value in slot for r8 | |
581 | .mem.offset 8,0; st8.spill [r3]=r10 // clear error indication in slot for r10 | |
582 | br.call.sptk.many rp=syscall_trace_leave // give parent a chance to catch return value | |
6f6d7582 JS |
583 | .ret3: |
584 | (pUStk) cmp.eq.unc p6,p0=r0,r0 // p6 <- pUStk | |
38477ad7 | 585 | (pUStk) rsm psr.i // disable interrupts |
4df8d22b | 586 | br.cond.sptk ia64_work_pending_syscall_end |
1da177e4 LT |
587 | |
588 | strace_error: | |
589 | ld8 r3=[r2] // load pt_regs.r8 | |
590 | sub r9=0,r8 // negate return value to get errno value | |
591 | ;; | |
592 | cmp.ne p6,p0=r3,r0 // is pt_regs.r8!=0? | |
593 | adds r3=16,r2 // r3=&pt_regs.r10 | |
594 | ;; | |
595 | (p6) mov r10=-1 | |
596 | (p6) mov r8=r9 | |
597 | br.cond.sptk .strace_save_retval | |
598 | END(ia64_trace_syscall) | |
599 | ||
600 | /* | |
601 | * When traced and returning from sigreturn, we invoke syscall_trace but then | |
602 | * go straight to ia64_leave_kernel rather than ia64_leave_syscall. | |
603 | */ | |
604 | GLOBAL_ENTRY(ia64_strace_leave_kernel) | |
605 | PT_REGS_UNWIND_INFO(0) | |
606 | { /* | |
607 | * Some versions of gas generate bad unwind info if the first instruction of a | |
608 | * procedure doesn't go into the first slot of a bundle. This is a workaround. | |
609 | */ | |
610 | nop.m 0 | |
611 | nop.i 0 | |
612 | br.call.sptk.many rp=syscall_trace_leave // give parent a chance to catch return value | |
613 | } | |
614 | .ret4: br.cond.sptk ia64_leave_kernel | |
615 | END(ia64_strace_leave_kernel) | |
616 | ||
617 | GLOBAL_ENTRY(ia64_ret_from_clone) | |
618 | PT_REGS_UNWIND_INFO(0) | |
619 | { /* | |
620 | * Some versions of gas generate bad unwind info if the first instruction of a | |
621 | * procedure doesn't go into the first slot of a bundle. This is a workaround. | |
622 | */ | |
623 | nop.m 0 | |
624 | nop.i 0 | |
625 | /* | |
626 | * We need to call schedule_tail() to complete the scheduling process. | |
627 | * Called by ia64_switch_to() after do_fork()->copy_thread(). r8 contains the | |
628 | * address of the previously executing task. | |
629 | */ | |
630 | br.call.sptk.many rp=ia64_invoke_schedule_tail | |
631 | } | |
632 | .ret8: | |
633 | adds r2=TI_FLAGS+IA64_TASK_SIZE,r13 | |
634 | ;; | |
635 | ld4 r2=[r2] | |
636 | ;; | |
637 | mov r8=0 | |
638 | and r2=_TIF_SYSCALL_TRACEAUDIT,r2 | |
639 | ;; | |
640 | cmp.ne p6,p0=r2,r0 | |
641 | (p6) br.cond.spnt .strace_check_retval | |
642 | ;; // added stop bits to prevent r8 dependency | |
643 | END(ia64_ret_from_clone) | |
644 | // fall through | |
645 | GLOBAL_ENTRY(ia64_ret_from_syscall) | |
646 | PT_REGS_UNWIND_INFO(0) | |
647 | cmp.ge p6,p7=r8,r0 // syscall executed successfully? | |
648 | adds r2=PT(R8)+16,sp // r2 = &pt_regs.r8 | |
649 | mov r10=r0 // clear error indication in r10 | |
650 | (p7) br.cond.spnt handle_syscall_error // handle potential syscall failure | |
4df8d22b IY |
651 | #ifdef CONFIG_PARAVIRT |
652 | ;; | |
653 | br.cond.sptk.few ia64_leave_syscall | |
654 | ;; | |
655 | #endif /* CONFIG_PARAVIRT */ | |
1da177e4 | 656 | END(ia64_ret_from_syscall) |
4df8d22b | 657 | #ifndef CONFIG_PARAVIRT |
1da177e4 | 658 | // fall through |
4df8d22b IY |
659 | #endif |
660 | #endif /* __IA64_ASM_PARAVIRTUALIZED_NATIVE */ | |
661 | ||
1da177e4 LT |
662 | /* |
663 | * ia64_leave_syscall(): Same as ia64_leave_kernel, except that it doesn't | |
664 | * need to switch to bank 0 and doesn't restore the scratch registers. | |
665 | * To avoid leaking kernel bits, the scratch registers are set to | |
666 | * the following known-to-be-safe values: | |
667 | * | |
668 | * r1: restored (global pointer) | |
669 | * r2: cleared | |
670 | * r3: 1 (when returning to user-level) | |
671 | * r8-r11: restored (syscall return value(s)) | |
672 | * r12: restored (user-level stack pointer) | |
673 | * r13: restored (user-level thread pointer) | |
c03f058f | 674 | * r14: set to __kernel_syscall_via_epc |
1da177e4 LT |
675 | * r15: restored (syscall #) |
676 | * r16-r17: cleared | |
677 | * r18: user-level b6 | |
678 | * r19: cleared | |
679 | * r20: user-level ar.fpsr | |
680 | * r21: user-level b0 | |
681 | * r22: cleared | |
682 | * r23: user-level ar.bspstore | |
683 | * r24: user-level ar.rnat | |
684 | * r25: user-level ar.unat | |
685 | * r26: user-level ar.pfs | |
686 | * r27: user-level ar.rsc | |
687 | * r28: user-level ip | |
688 | * r29: user-level psr | |
689 | * r30: user-level cfm | |
690 | * r31: user-level pr | |
691 | * f6-f11: cleared | |
692 | * pr: restored (user-level pr) | |
693 | * b0: restored (user-level rp) | |
694 | * b6: restored | |
c03f058f | 695 | * b7: set to __kernel_syscall_via_epc |
1da177e4 LT |
696 | * ar.unat: restored (user-level ar.unat) |
697 | * ar.pfs: restored (user-level ar.pfs) | |
698 | * ar.rsc: restored (user-level ar.rsc) | |
699 | * ar.rnat: restored (user-level ar.rnat) | |
700 | * ar.bspstore: restored (user-level ar.bspstore) | |
701 | * ar.fpsr: restored (user-level ar.fpsr) | |
702 | * ar.ccv: cleared | |
703 | * ar.csd: cleared | |
704 | * ar.ssd: cleared | |
705 | */ | |
4df8d22b | 706 | GLOBAL_ENTRY(__paravirt_leave_syscall) |
1da177e4 LT |
707 | PT_REGS_UNWIND_INFO(0) |
708 | /* | |
709 | * work.need_resched etc. mustn't get changed by this CPU before it returns to | |
710 | * user- or fsys-mode, hence we disable interrupts early on. | |
711 | * | |
712 | * p6 controls whether current_thread_info()->flags needs to be check for | |
713 | * extra work. We always check for extra work when returning to user-level. | |
714 | * With CONFIG_PREEMPT, we also check for extra work when the preempt_count | |
715 | * is 0. After extra work processing has been completed, execution | |
4df8d22b | 716 | * resumes at ia64_work_processed_syscall with p6 set to 1 if the extra-work-check |
1da177e4 LT |
717 | * needs to be redone. |
718 | */ | |
719 | #ifdef CONFIG_PREEMPT | |
4df8d22b | 720 | RSM_PSR_I(p0, r2, r18) // disable interrupts |
1da177e4 LT |
721 | cmp.eq pLvSys,p0=r0,r0 // pLvSys=1: leave from syscall |
722 | (pKStk) adds r20=TI_PRE_COUNT+IA64_TASK_SIZE,r13 | |
723 | ;; | |
724 | .pred.rel.mutex pUStk,pKStk | |
725 | (pKStk) ld4 r21=[r20] // r21 <- preempt_count | |
726 | (pUStk) mov r21=0 // r21 <- 0 | |
727 | ;; | |
728 | cmp.eq p6,p0=r21,r0 // p6 <- pUStk || (preempt_count == 0) | |
729 | #else /* !CONFIG_PREEMPT */ | |
4df8d22b | 730 | RSM_PSR_I(pUStk, r2, r18) |
1da177e4 LT |
731 | cmp.eq pLvSys,p0=r0,r0 // pLvSys=1: leave from syscall |
732 | (pUStk) cmp.eq.unc p6,p0=r0,r0 // p6 <- pUStk | |
733 | #endif | |
4df8d22b IY |
734 | .global __paravirt_work_processed_syscall; |
735 | __paravirt_work_processed_syscall: | |
b64f34cd HS |
736 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
737 | adds r2=PT(LOADRS)+16,r12 | |
738 | (pUStk) mov.m r22=ar.itc // fetch time at leave | |
739 | adds r18=TI_FLAGS+IA64_TASK_SIZE,r13 | |
740 | ;; | |
741 | (p6) ld4 r31=[r18] // load current_thread_info()->flags | |
742 | ld8 r19=[r2],PT(B6)-PT(LOADRS) // load ar.rsc value for "loadrs" | |
743 | adds r3=PT(AR_BSPSTORE)+16,r12 // deferred | |
744 | ;; | |
745 | #else | |
1da177e4 LT |
746 | adds r2=PT(LOADRS)+16,r12 |
747 | adds r3=PT(AR_BSPSTORE)+16,r12 | |
748 | adds r18=TI_FLAGS+IA64_TASK_SIZE,r13 | |
749 | ;; | |
750 | (p6) ld4 r31=[r18] // load current_thread_info()->flags | |
751 | ld8 r19=[r2],PT(B6)-PT(LOADRS) // load ar.rsc value for "loadrs" | |
96e01749 | 752 | nop.i 0 |
1da177e4 | 753 | ;; |
b64f34cd | 754 | #endif |
87e522a0 | 755 | mov r16=ar.bsp // M2 get existing backing store pointer |
1da177e4 LT |
756 | ld8 r18=[r2],PT(R9)-PT(B6) // load b6 |
757 | (p6) and r15=TIF_WORK_MASK,r31 // any work other than TIF_SYSCALL_TRACE? | |
758 | ;; | |
87e522a0 | 759 | ld8 r23=[r3],PT(R11)-PT(AR_BSPSTORE) // load ar.bspstore (may be garbage) |
1da177e4 LT |
760 | (p6) cmp4.ne.unc p6,p0=r15, r0 // any special work pending? |
761 | (p6) br.cond.spnt .work_pending_syscall | |
762 | ;; | |
763 | // start restoring the state saved on the kernel stack (struct pt_regs): | |
764 | ld8 r9=[r2],PT(CR_IPSR)-PT(R9) | |
765 | ld8 r11=[r3],PT(CR_IIP)-PT(R11) | |
87e522a0 | 766 | (pNonSys) break 0 // bug check: we shouldn't be here if pNonSys is TRUE! |
1da177e4 LT |
767 | ;; |
768 | invala // M0|1 invalidate ALAT | |
4df8d22b | 769 | RSM_PSR_I_IC(r28, r29, r30) // M2 turn off interrupts and interruption collection |
c03f058f | 770 | cmp.eq p9,p0=r0,r0 // A set p9 to indicate that we should restore cr.ifs |
1da177e4 | 771 | |
c03f058f DMT |
772 | ld8 r29=[r2],16 // M0|1 load cr.ipsr |
773 | ld8 r28=[r3],16 // M0|1 load cr.iip | |
b64f34cd HS |
774 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
775 | (pUStk) add r14=TI_AC_LEAVE+IA64_TASK_SIZE,r13 | |
776 | ;; | |
777 | ld8 r30=[r2],16 // M0|1 load cr.ifs | |
778 | ld8 r25=[r3],16 // M0|1 load ar.unat | |
779 | (pUStk) add r15=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13 | |
780 | ;; | |
781 | #else | |
c03f058f | 782 | mov r22=r0 // A clear r22 |
1da177e4 LT |
783 | ;; |
784 | ld8 r30=[r2],16 // M0|1 load cr.ifs | |
1da177e4 | 785 | ld8 r25=[r3],16 // M0|1 load ar.unat |
87e522a0 | 786 | (pUStk) add r14=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13 |
1da177e4 | 787 | ;; |
b64f34cd | 788 | #endif |
1da177e4 | 789 | ld8 r26=[r2],PT(B0)-PT(AR_PFS) // M0|1 load ar.pfs |
4df8d22b | 790 | MOV_FROM_PSR(pKStk, r22, r21) // M2 read PSR now that interrupts are disabled |
87e522a0 | 791 | nop 0 |
1da177e4 | 792 | ;; |
c03f058f DMT |
793 | ld8 r21=[r2],PT(AR_RNAT)-PT(B0) // M0|1 load b0 |
794 | ld8 r27=[r3],PT(PR)-PT(AR_RSC) // M0|1 load ar.rsc | |
795 | mov f6=f0 // F clear f6 | |
1da177e4 | 796 | ;; |
c03f058f DMT |
797 | ld8 r24=[r2],PT(AR_FPSR)-PT(AR_RNAT) // M0|1 load ar.rnat (may be garbage) |
798 | ld8 r31=[r3],PT(R1)-PT(PR) // M0|1 load predicates | |
799 | mov f7=f0 // F clear f7 | |
1da177e4 | 800 | ;; |
c03f058f DMT |
801 | ld8 r20=[r2],PT(R12)-PT(AR_FPSR) // M0|1 load ar.fpsr |
802 | ld8.fill r1=[r3],16 // M0|1 load r1 | |
803 | (pUStk) mov r17=1 // A | |
1da177e4 | 804 | ;; |
b64f34cd HS |
805 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
806 | (pUStk) st1 [r15]=r17 // M2|3 | |
807 | #else | |
c03f058f | 808 | (pUStk) st1 [r14]=r17 // M2|3 |
b64f34cd | 809 | #endif |
c03f058f DMT |
810 | ld8.fill r13=[r3],16 // M0|1 |
811 | mov f8=f0 // F clear f8 | |
1da177e4 | 812 | ;; |
c03f058f DMT |
813 | ld8.fill r12=[r2] // M0|1 restore r12 (sp) |
814 | ld8.fill r15=[r3] // M0|1 restore r15 | |
815 | mov b6=r18 // I0 restore b6 | |
30325d17 | 816 | |
a0776ec8 | 817 | LOAD_PHYS_STACK_REG_SIZE(r17) |
c03f058f DMT |
818 | mov f9=f0 // F clear f9 |
819 | (pKStk) br.cond.dpnt.many skip_rbs_switch // B | |
87e522a0 | 820 | |
c03f058f DMT |
821 | srlz.d // M0 ensure interruption collection is off (for cover) |
822 | shr.u r18=r19,16 // I0|1 get byte size of existing "dirty" partition | |
4df8d22b | 823 | COVER // B add current frame into dirty partition & set cr.ifs |
1da177e4 | 824 | ;; |
b64f34cd HS |
825 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
826 | mov r19=ar.bsp // M2 get new backing store pointer | |
827 | st8 [r14]=r22 // M save time at leave | |
828 | mov f10=f0 // F clear f10 | |
829 | ||
830 | mov r22=r0 // A clear r22 | |
831 | movl r14=__kernel_syscall_via_epc // X | |
832 | ;; | |
833 | #else | |
c03f058f DMT |
834 | mov r19=ar.bsp // M2 get new backing store pointer |
835 | mov f10=f0 // F clear f10 | |
96e01749 DMT |
836 | |
837 | nop.m 0 | |
c03f058f | 838 | movl r14=__kernel_syscall_via_epc // X |
1da177e4 | 839 | ;; |
b64f34cd | 840 | #endif |
c03f058f DMT |
841 | mov.m ar.csd=r0 // M2 clear ar.csd |
842 | mov.m ar.ccv=r0 // M2 clear ar.ccv | |
843 | mov b7=r14 // I0 clear b7 (hint with __kernel_syscall_via_epc) | |
1da177e4 | 844 | |
c03f058f DMT |
845 | mov.m ar.ssd=r0 // M2 clear ar.ssd |
846 | mov f11=f0 // F clear f11 | |
847 | br.cond.sptk.many rbs_switch // B | |
4df8d22b | 848 | END(__paravirt_leave_syscall) |
1da177e4 | 849 | |
4df8d22b | 850 | #ifdef __IA64_ASM_PARAVIRTUALIZED_NATIVE |
1da177e4 LT |
851 | #ifdef CONFIG_IA32_SUPPORT |
852 | GLOBAL_ENTRY(ia64_ret_from_ia32_execve) | |
853 | PT_REGS_UNWIND_INFO(0) | |
854 | adds r2=PT(R8)+16,sp // r2 = &pt_regs.r8 | |
855 | adds r3=PT(R10)+16,sp // r3 = &pt_regs.r10 | |
856 | ;; | |
857 | .mem.offset 0,0 | |
858 | st8.spill [r2]=r8 // store return value in slot for r8 and set unat bit | |
859 | .mem.offset 8,0 | |
860 | st8.spill [r3]=r0 // clear error indication in slot for r10 and set unat bit | |
4df8d22b IY |
861 | #ifdef CONFIG_PARAVIRT |
862 | ;; | |
863 | // don't fall through, ia64_leave_kernel may be #define'd | |
864 | br.cond.sptk.few ia64_leave_kernel | |
865 | ;; | |
866 | #endif /* CONFIG_PARAVIRT */ | |
9df6f705 | 867 | END(ia64_ret_from_ia32_execve) |
4df8d22b | 868 | #ifndef CONFIG_PARAVIRT |
1da177e4 | 869 | // fall through |
4df8d22b | 870 | #endif |
1da177e4 | 871 | #endif /* CONFIG_IA32_SUPPORT */ |
4df8d22b IY |
872 | #endif /* __IA64_ASM_PARAVIRTUALIZED_NATIVE */ |
873 | ||
874 | GLOBAL_ENTRY(__paravirt_leave_kernel) | |
1da177e4 LT |
875 | PT_REGS_UNWIND_INFO(0) |
876 | /* | |
877 | * work.need_resched etc. mustn't get changed by this CPU before it returns to | |
878 | * user- or fsys-mode, hence we disable interrupts early on. | |
879 | * | |
880 | * p6 controls whether current_thread_info()->flags needs to be check for | |
881 | * extra work. We always check for extra work when returning to user-level. | |
882 | * With CONFIG_PREEMPT, we also check for extra work when the preempt_count | |
883 | * is 0. After extra work processing has been completed, execution | |
884 | * resumes at .work_processed_syscall with p6 set to 1 if the extra-work-check | |
885 | * needs to be redone. | |
886 | */ | |
887 | #ifdef CONFIG_PREEMPT | |
4df8d22b | 888 | RSM_PSR_I(p0, r17, r31) // disable interrupts |
1da177e4 LT |
889 | cmp.eq p0,pLvSys=r0,r0 // pLvSys=0: leave from kernel |
890 | (pKStk) adds r20=TI_PRE_COUNT+IA64_TASK_SIZE,r13 | |
891 | ;; | |
892 | .pred.rel.mutex pUStk,pKStk | |
893 | (pKStk) ld4 r21=[r20] // r21 <- preempt_count | |
894 | (pUStk) mov r21=0 // r21 <- 0 | |
895 | ;; | |
896 | cmp.eq p6,p0=r21,r0 // p6 <- pUStk || (preempt_count == 0) | |
897 | #else | |
4df8d22b | 898 | RSM_PSR_I(pUStk, r17, r31) |
1da177e4 LT |
899 | cmp.eq p0,pLvSys=r0,r0 // pLvSys=0: leave from kernel |
900 | (pUStk) cmp.eq.unc p6,p0=r0,r0 // p6 <- pUStk | |
901 | #endif | |
902 | .work_processed_kernel: | |
903 | adds r17=TI_FLAGS+IA64_TASK_SIZE,r13 | |
904 | ;; | |
905 | (p6) ld4 r31=[r17] // load current_thread_info()->flags | |
906 | adds r21=PT(PR)+16,r12 | |
907 | ;; | |
908 | ||
909 | lfetch [r21],PT(CR_IPSR)-PT(PR) | |
910 | adds r2=PT(B6)+16,r12 | |
911 | adds r3=PT(R16)+16,r12 | |
912 | ;; | |
913 | lfetch [r21] | |
914 | ld8 r28=[r2],8 // load b6 | |
915 | adds r29=PT(R24)+16,r12 | |
916 | ||
917 | ld8.fill r16=[r3],PT(AR_CSD)-PT(R16) | |
918 | adds r30=PT(AR_CCV)+16,r12 | |
919 | (p6) and r19=TIF_WORK_MASK,r31 // any work other than TIF_SYSCALL_TRACE? | |
920 | ;; | |
921 | ld8.fill r24=[r29] | |
922 | ld8 r15=[r30] // load ar.ccv | |
923 | (p6) cmp4.ne.unc p6,p0=r19, r0 // any special work pending? | |
924 | ;; | |
925 | ld8 r29=[r2],16 // load b7 | |
926 | ld8 r30=[r3],16 // load ar.csd | |
927 | (p6) br.cond.spnt .work_pending | |
928 | ;; | |
929 | ld8 r31=[r2],16 // load ar.ssd | |
930 | ld8.fill r8=[r3],16 | |
931 | ;; | |
932 | ld8.fill r9=[r2],16 | |
933 | ld8.fill r10=[r3],PT(R17)-PT(R10) | |
934 | ;; | |
935 | ld8.fill r11=[r2],PT(R18)-PT(R11) | |
936 | ld8.fill r17=[r3],16 | |
937 | ;; | |
938 | ld8.fill r18=[r2],16 | |
939 | ld8.fill r19=[r3],16 | |
940 | ;; | |
941 | ld8.fill r20=[r2],16 | |
942 | ld8.fill r21=[r3],16 | |
943 | mov ar.csd=r30 | |
944 | mov ar.ssd=r31 | |
945 | ;; | |
4df8d22b | 946 | RSM_PSR_I_IC(r23, r22, r25) // initiate turning off of interrupt and interruption collection |
1da177e4 LT |
947 | invala // invalidate ALAT |
948 | ;; | |
949 | ld8.fill r22=[r2],24 | |
950 | ld8.fill r23=[r3],24 | |
951 | mov b6=r28 | |
952 | ;; | |
953 | ld8.fill r25=[r2],16 | |
954 | ld8.fill r26=[r3],16 | |
955 | mov b7=r29 | |
956 | ;; | |
957 | ld8.fill r27=[r2],16 | |
958 | ld8.fill r28=[r3],16 | |
959 | ;; | |
960 | ld8.fill r29=[r2],16 | |
961 | ld8.fill r30=[r3],24 | |
962 | ;; | |
963 | ld8.fill r31=[r2],PT(F9)-PT(R31) | |
964 | adds r3=PT(F10)-PT(F6),r3 | |
965 | ;; | |
966 | ldf.fill f9=[r2],PT(F6)-PT(F9) | |
967 | ldf.fill f10=[r3],PT(F8)-PT(F10) | |
968 | ;; | |
969 | ldf.fill f6=[r2],PT(F7)-PT(F6) | |
970 | ;; | |
971 | ldf.fill f7=[r2],PT(F11)-PT(F7) | |
972 | ldf.fill f8=[r3],32 | |
973 | ;; | |
e7e965fa | 974 | srlz.d // ensure that inter. collection is off (VHPT is don't care, since text is pinned) |
1da177e4 LT |
975 | mov ar.ccv=r15 |
976 | ;; | |
977 | ldf.fill f11=[r2] | |
4df8d22b | 978 | BSW_0(r2, r3, r15) // switch back to bank 0 (no stop bit required beforehand...) |
1da177e4 LT |
979 | ;; |
980 | (pUStk) mov r18=IA64_KR(CURRENT)// M2 (12 cycle read latency) | |
981 | adds r16=PT(CR_IPSR)+16,r12 | |
982 | adds r17=PT(CR_IIP)+16,r12 | |
983 | ||
b64f34cd HS |
984 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
985 | .pred.rel.mutex pUStk,pKStk | |
4df8d22b | 986 | MOV_FROM_PSR(pKStk, r22, r29) // M2 read PSR now that interrupts are disabled |
b64f34cd HS |
987 | (pUStk) mov.m r22=ar.itc // M fetch time at leave |
988 | nop.i 0 | |
989 | ;; | |
990 | #else | |
4df8d22b | 991 | MOV_FROM_PSR(pKStk, r22, r29) // M2 read PSR now that interrupts are disabled |
1da177e4 LT |
992 | nop.i 0 |
993 | nop.i 0 | |
994 | ;; | |
b64f34cd | 995 | #endif |
1da177e4 LT |
996 | ld8 r29=[r16],16 // load cr.ipsr |
997 | ld8 r28=[r17],16 // load cr.iip | |
998 | ;; | |
999 | ld8 r30=[r16],16 // load cr.ifs | |
1000 | ld8 r25=[r17],16 // load ar.unat | |
1001 | ;; | |
1002 | ld8 r26=[r16],16 // load ar.pfs | |
1003 | ld8 r27=[r17],16 // load ar.rsc | |
1004 | cmp.eq p9,p0=r0,r0 // set p9 to indicate that we should restore cr.ifs | |
1005 | ;; | |
1006 | ld8 r24=[r16],16 // load ar.rnat (may be garbage) | |
1007 | ld8 r23=[r17],16 // load ar.bspstore (may be garbage) | |
1008 | ;; | |
1009 | ld8 r31=[r16],16 // load predicates | |
1010 | ld8 r21=[r17],16 // load b0 | |
1011 | ;; | |
1012 | ld8 r19=[r16],16 // load ar.rsc value for "loadrs" | |
1013 | ld8.fill r1=[r17],16 // load r1 | |
1014 | ;; | |
1015 | ld8.fill r12=[r16],16 | |
1016 | ld8.fill r13=[r17],16 | |
b64f34cd HS |
1017 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
1018 | (pUStk) adds r3=TI_AC_LEAVE+IA64_TASK_SIZE,r18 | |
1019 | #else | |
1da177e4 | 1020 | (pUStk) adds r18=IA64_TASK_THREAD_ON_USTACK_OFFSET,r18 |
b64f34cd | 1021 | #endif |
1da177e4 LT |
1022 | ;; |
1023 | ld8 r20=[r16],16 // ar.fpsr | |
1024 | ld8.fill r15=[r17],16 | |
b64f34cd HS |
1025 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
1026 | (pUStk) adds r18=IA64_TASK_THREAD_ON_USTACK_OFFSET,r18 // deferred | |
1027 | #endif | |
1da177e4 LT |
1028 | ;; |
1029 | ld8.fill r14=[r16],16 | |
1030 | ld8.fill r2=[r17] | |
1031 | (pUStk) mov r17=1 | |
1032 | ;; | |
b64f34cd HS |
1033 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
1034 | // mmi_ : ld8 st1 shr;; mmi_ : st8 st1 shr;; | |
1035 | // mib : mov add br -> mib : ld8 add br | |
1036 | // bbb_ : br nop cover;; mbb_ : mov br cover;; | |
1037 | // | |
1038 | // no one require bsp in r16 if (pKStk) branch is selected. | |
1039 | (pUStk) st8 [r3]=r22 // save time at leave | |
1040 | (pUStk) st1 [r18]=r17 // restore current->thread.on_ustack | |
1041 | shr.u r18=r19,16 // get byte size of existing "dirty" partition | |
1042 | ;; | |
1043 | ld8.fill r3=[r16] // deferred | |
1044 | LOAD_PHYS_STACK_REG_SIZE(r17) | |
1045 | (pKStk) br.cond.dpnt skip_rbs_switch | |
1046 | mov r16=ar.bsp // get existing backing store pointer | |
1047 | #else | |
1da177e4 LT |
1048 | ld8.fill r3=[r16] |
1049 | (pUStk) st1 [r18]=r17 // restore current->thread.on_ustack | |
1050 | shr.u r18=r19,16 // get byte size of existing "dirty" partition | |
1051 | ;; | |
1052 | mov r16=ar.bsp // get existing backing store pointer | |
a0776ec8 | 1053 | LOAD_PHYS_STACK_REG_SIZE(r17) |
1da177e4 | 1054 | (pKStk) br.cond.dpnt skip_rbs_switch |
b64f34cd | 1055 | #endif |
1da177e4 LT |
1056 | |
1057 | /* | |
1058 | * Restore user backing store. | |
1059 | * | |
1060 | * NOTE: alloc, loadrs, and cover can't be predicated. | |
1061 | */ | |
1062 | (pNonSys) br.cond.dpnt dont_preserve_current_frame | |
4df8d22b | 1063 | COVER // add current frame into dirty partition and set cr.ifs |
1da177e4 LT |
1064 | ;; |
1065 | mov r19=ar.bsp // get new backing store pointer | |
87e522a0 | 1066 | rbs_switch: |
1da177e4 LT |
1067 | sub r16=r16,r18 // krbs = old bsp - size of dirty partition |
1068 | cmp.ne p9,p0=r0,r0 // clear p9 to skip restore of cr.ifs | |
1069 | ;; | |
1070 | sub r19=r19,r16 // calculate total byte size of dirty partition | |
1071 | add r18=64,r18 // don't force in0-in7 into memory... | |
1072 | ;; | |
1073 | shl r19=r19,16 // shift size of dirty partition into loadrs position | |
1074 | ;; | |
1075 | dont_preserve_current_frame: | |
1076 | /* | |
1077 | * To prevent leaking bits between the kernel and user-space, | |
1078 | * we must clear the stacked registers in the "invalid" partition here. | |
1079 | * Not pretty, but at least it's fast (3.34 registers/cycle on Itanium, | |
1080 | * 5 registers/cycle on McKinley). | |
1081 | */ | |
1082 | # define pRecurse p6 | |
1083 | # define pReturn p7 | |
1084 | #ifdef CONFIG_ITANIUM | |
1085 | # define Nregs 10 | |
1086 | #else | |
1087 | # define Nregs 14 | |
1088 | #endif | |
1089 | alloc loc0=ar.pfs,2,Nregs-2,2,0 | |
1090 | shr.u loc1=r18,9 // RNaTslots <= floor(dirtySize / (64*8)) | |
1091 | sub r17=r17,r18 // r17 = (physStackedSize + 8) - dirtySize | |
1092 | ;; | |
1093 | mov ar.rsc=r19 // load ar.rsc to be used for "loadrs" | |
1094 | shladd in0=loc1,3,r17 | |
1095 | mov in1=0 | |
1096 | ;; | |
1097 | TEXT_ALIGN(32) | |
1098 | rse_clear_invalid: | |
1099 | #ifdef CONFIG_ITANIUM | |
1100 | // cycle 0 | |
1101 | { .mii | |
1102 | alloc loc0=ar.pfs,2,Nregs-2,2,0 | |
1103 | cmp.lt pRecurse,p0=Nregs*8,in0 // if more than Nregs regs left to clear, (re)curse | |
1104 | add out0=-Nregs*8,in0 | |
1105 | }{ .mfb | |
1106 | add out1=1,in1 // increment recursion count | |
1107 | nop.f 0 | |
1108 | nop.b 0 // can't do br.call here because of alloc (WAW on CFM) | |
1109 | ;; | |
1110 | }{ .mfi // cycle 1 | |
1111 | mov loc1=0 | |
1112 | nop.f 0 | |
1113 | mov loc2=0 | |
1114 | }{ .mib | |
1115 | mov loc3=0 | |
1116 | mov loc4=0 | |
1117 | (pRecurse) br.call.sptk.many b0=rse_clear_invalid | |
1118 | ||
1119 | }{ .mfi // cycle 2 | |
1120 | mov loc5=0 | |
1121 | nop.f 0 | |
1122 | cmp.ne pReturn,p0=r0,in1 // if recursion count != 0, we need to do a br.ret | |
1123 | }{ .mib | |
1124 | mov loc6=0 | |
1125 | mov loc7=0 | |
1126 | (pReturn) br.ret.sptk.many b0 | |
1127 | } | |
1128 | #else /* !CONFIG_ITANIUM */ | |
1129 | alloc loc0=ar.pfs,2,Nregs-2,2,0 | |
1130 | cmp.lt pRecurse,p0=Nregs*8,in0 // if more than Nregs regs left to clear, (re)curse | |
1131 | add out0=-Nregs*8,in0 | |
1132 | add out1=1,in1 // increment recursion count | |
1133 | mov loc1=0 | |
1134 | mov loc2=0 | |
1135 | ;; | |
1136 | mov loc3=0 | |
1137 | mov loc4=0 | |
1138 | mov loc5=0 | |
1139 | mov loc6=0 | |
1140 | mov loc7=0 | |
9ec1a7ad | 1141 | (pRecurse) br.call.dptk.few b0=rse_clear_invalid |
1da177e4 LT |
1142 | ;; |
1143 | mov loc8=0 | |
1144 | mov loc9=0 | |
1145 | cmp.ne pReturn,p0=r0,in1 // if recursion count != 0, we need to do a br.ret | |
1146 | mov loc10=0 | |
1147 | mov loc11=0 | |
9ec1a7ad | 1148 | (pReturn) br.ret.dptk.many b0 |
1da177e4 LT |
1149 | #endif /* !CONFIG_ITANIUM */ |
1150 | # undef pRecurse | |
1151 | # undef pReturn | |
1152 | ;; | |
1153 | alloc r17=ar.pfs,0,0,0,0 // drop current register frame | |
1154 | ;; | |
1155 | loadrs | |
1156 | ;; | |
1157 | skip_rbs_switch: | |
1158 | mov ar.unat=r25 // M2 | |
1159 | (pKStk) extr.u r22=r22,21,1 // I0 extract current value of psr.pp from r22 | |
1160 | (pLvSys)mov r19=r0 // A clear r19 for leave_syscall, no-op otherwise | |
1161 | ;; | |
1162 | (pUStk) mov ar.bspstore=r23 // M2 | |
1163 | (pKStk) dep r29=r22,r29,21,1 // I0 update ipsr.pp with psr.pp | |
1164 | (pLvSys)mov r16=r0 // A clear r16 for leave_syscall, no-op otherwise | |
1165 | ;; | |
4df8d22b | 1166 | MOV_TO_IPSR(p0, r29, r25) // M2 |
1da177e4 LT |
1167 | mov ar.pfs=r26 // I0 |
1168 | (pLvSys)mov r17=r0 // A clear r17 for leave_syscall, no-op otherwise | |
1169 | ||
4df8d22b | 1170 | MOV_TO_IFS(p9, r30, r25)// M2 |
1da177e4 LT |
1171 | mov b0=r21 // I0 |
1172 | (pLvSys)mov r18=r0 // A clear r18 for leave_syscall, no-op otherwise | |
1173 | ||
1174 | mov ar.fpsr=r20 // M2 | |
4df8d22b | 1175 | MOV_TO_IIP(r28, r25) // M2 |
1da177e4 LT |
1176 | nop 0 |
1177 | ;; | |
1178 | (pUStk) mov ar.rnat=r24 // M2 must happen with RSE in lazy mode | |
1179 | nop 0 | |
1180 | (pLvSys)mov r2=r0 | |
1181 | ||
1182 | mov ar.rsc=r27 // M2 | |
1183 | mov pr=r31,-1 // I0 | |
4df8d22b | 1184 | RFI // B |
1da177e4 LT |
1185 | |
1186 | /* | |
1187 | * On entry: | |
1188 | * r20 = ¤t->thread_info->pre_count (if CONFIG_PREEMPT) | |
1189 | * r31 = current->thread_info->flags | |
1190 | * On exit: | |
1191 | * p6 = TRUE if work-pending-check needs to be redone | |
3633c730 HS |
1192 | * |
1193 | * Interrupts are disabled on entry, reenabled depend on work, and | |
1194 | * disabled on exit. | |
1da177e4 LT |
1195 | */ |
1196 | .work_pending_syscall: | |
1197 | add r2=-8,r2 | |
1198 | add r3=-8,r3 | |
1199 | ;; | |
1200 | st8 [r2]=r8 | |
1201 | st8 [r3]=r10 | |
1202 | .work_pending: | |
2e513fe4 | 1203 | tbit.z p6,p0=r31,TIF_NEED_RESCHED // is resched not needed? |
1da177e4 LT |
1204 | (p6) br.cond.sptk.few .notify |
1205 | #ifdef CONFIG_PREEMPT | |
1206 | (pKStk) dep r21=-1,r0,PREEMPT_ACTIVE_BIT,1 | |
1207 | ;; | |
1208 | (pKStk) st4 [r20]=r21 | |
1da177e4 | 1209 | #endif |
4df8d22b | 1210 | SSM_PSR_I(p0, p6, r2) // enable interrupts |
1da177e4 | 1211 | br.call.spnt.many rp=schedule |
2e513fe4 | 1212 | .ret9: cmp.eq p6,p0=r0,r0 // p6 <- 1 (re-check) |
4df8d22b | 1213 | RSM_PSR_I(p0, r2, r20) // disable interrupts |
1da177e4 LT |
1214 | ;; |
1215 | #ifdef CONFIG_PREEMPT | |
1216 | (pKStk) adds r20=TI_PRE_COUNT+IA64_TASK_SIZE,r13 | |
1217 | ;; | |
1218 | (pKStk) st4 [r20]=r0 // preempt_count() <- 0 | |
1219 | #endif | |
4df8d22b | 1220 | (pLvSys)br.cond.sptk.few __paravirt_pending_syscall_end |
2e513fe4 | 1221 | br.cond.sptk.many .work_processed_kernel |
1da177e4 LT |
1222 | |
1223 | .notify: | |
1224 | (pUStk) br.call.spnt.many rp=notify_resume_user | |
2e513fe4 | 1225 | .ret10: cmp.ne p6,p0=r0,r0 // p6 <- 0 (don't re-check) |
4df8d22b | 1226 | (pLvSys)br.cond.sptk.few __paravirt_pending_syscall_end |
2e513fe4 | 1227 | br.cond.sptk.many .work_processed_kernel |
1da177e4 | 1228 | |
4df8d22b IY |
1229 | .global __paravirt_pending_syscall_end; |
1230 | __paravirt_pending_syscall_end: | |
1da177e4 LT |
1231 | adds r2=PT(R8)+16,r12 |
1232 | adds r3=PT(R10)+16,r12 | |
1233 | ;; | |
1234 | ld8 r8=[r2] | |
1235 | ld8 r10=[r3] | |
4df8d22b IY |
1236 | br.cond.sptk.many __paravirt_work_processed_syscall_target |
1237 | END(__paravirt_leave_kernel) | |
1da177e4 | 1238 | |
4df8d22b | 1239 | #ifdef __IA64_ASM_PARAVIRTUALIZED_NATIVE |
1da177e4 LT |
1240 | ENTRY(handle_syscall_error) |
1241 | /* | |
1242 | * Some system calls (e.g., ptrace, mmap) can return arbitrary values which could | |
1243 | * lead us to mistake a negative return value as a failed syscall. Those syscall | |
1244 | * must deposit a non-zero value in pt_regs.r8 to indicate an error. If | |
1245 | * pt_regs.r8 is zero, we assume that the call completed successfully. | |
1246 | */ | |
1247 | PT_REGS_UNWIND_INFO(0) | |
1248 | ld8 r3=[r2] // load pt_regs.r8 | |
1249 | ;; | |
1250 | cmp.eq p6,p7=r3,r0 // is pt_regs.r8==0? | |
1251 | ;; | |
1252 | (p7) mov r10=-1 | |
1253 | (p7) sub r8=0,r8 // negate return value to get errno | |
1254 | br.cond.sptk ia64_leave_syscall | |
1255 | END(handle_syscall_error) | |
1256 | ||
1257 | /* | |
1258 | * Invoke schedule_tail(task) while preserving in0-in7, which may be needed | |
1259 | * in case a system call gets restarted. | |
1260 | */ | |
1261 | GLOBAL_ENTRY(ia64_invoke_schedule_tail) | |
1262 | .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8) | |
1263 | alloc loc1=ar.pfs,8,2,1,0 | |
1264 | mov loc0=rp | |
1265 | mov out0=r8 // Address of previous task | |
1266 | ;; | |
1267 | br.call.sptk.many rp=schedule_tail | |
1268 | .ret11: mov ar.pfs=loc1 | |
1269 | mov rp=loc0 | |
1270 | br.ret.sptk.many rp | |
1271 | END(ia64_invoke_schedule_tail) | |
1272 | ||
1273 | /* | |
3633c730 HS |
1274 | * Setup stack and call do_notify_resume_user(), keeping interrupts |
1275 | * disabled. | |
1276 | * | |
1277 | * Note that pSys and pNonSys need to be set up by the caller. | |
1278 | * We declare 8 input registers so the system call args get preserved, | |
1279 | * in case we need to restart a system call. | |
1da177e4 | 1280 | */ |
4df8d22b | 1281 | GLOBAL_ENTRY(notify_resume_user) |
1da177e4 LT |
1282 | .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8) |
1283 | alloc loc1=ar.pfs,8,2,3,0 // preserve all eight input regs in case of syscall restart! | |
1284 | mov r9=ar.unat | |
1285 | mov loc0=rp // save return address | |
1286 | mov out0=0 // there is no "oldset" | |
1287 | adds out1=8,sp // out1=&sigscratch->ar_pfs | |
1288 | (pSys) mov out2=1 // out2==1 => we're in a syscall | |
1289 | ;; | |
1290 | (pNonSys) mov out2=0 // out2==0 => not a syscall | |
1291 | .fframe 16 | |
bfd68594 | 1292 | .spillsp ar.unat, 16 |
1da177e4 LT |
1293 | st8 [sp]=r9,-16 // allocate space for ar.unat and save it |
1294 | st8 [out1]=loc1,-8 // save ar.pfs, out1=&sigscratch | |
1295 | .body | |
1296 | br.call.sptk.many rp=do_notify_resume_user | |
1297 | .ret15: .restore sp | |
1298 | adds sp=16,sp // pop scratch stack space | |
1299 | ;; | |
1300 | ld8 r9=[sp] // load new unat from sigscratch->scratch_unat | |
1301 | mov rp=loc0 | |
1302 | ;; | |
1303 | mov ar.unat=r9 | |
1304 | mov ar.pfs=loc1 | |
1305 | br.ret.sptk.many rp | |
1306 | END(notify_resume_user) | |
1307 | ||
1da177e4 LT |
1308 | ENTRY(sys_rt_sigreturn) |
1309 | PT_REGS_UNWIND_INFO(0) | |
1310 | /* | |
1311 | * Allocate 8 input registers since ptrace() may clobber them | |
1312 | */ | |
1313 | alloc r2=ar.pfs,8,0,1,0 | |
1314 | .prologue | |
1315 | PT_REGS_SAVES(16) | |
1316 | adds sp=-16,sp | |
1317 | .body | |
1318 | cmp.eq pNonSys,pSys=r0,r0 // sigreturn isn't a normal syscall... | |
1319 | ;; | |
1320 | /* | |
1321 | * leave_kernel() restores f6-f11 from pt_regs, but since the streamlined | |
1322 | * syscall-entry path does not save them we save them here instead. Note: we | |
1323 | * don't need to save any other registers that are not saved by the stream-lined | |
1324 | * syscall path, because restore_sigcontext() restores them. | |
1325 | */ | |
1326 | adds r16=PT(F6)+32,sp | |
1327 | adds r17=PT(F7)+32,sp | |
1328 | ;; | |
1329 | stf.spill [r16]=f6,32 | |
1330 | stf.spill [r17]=f7,32 | |
1331 | ;; | |
1332 | stf.spill [r16]=f8,32 | |
1333 | stf.spill [r17]=f9,32 | |
1334 | ;; | |
1335 | stf.spill [r16]=f10 | |
1336 | stf.spill [r17]=f11 | |
1337 | adds out0=16,sp // out0 = &sigscratch | |
1338 | br.call.sptk.many rp=ia64_rt_sigreturn | |
763b3917 | 1339 | .ret19: .restore sp,0 |
1da177e4 LT |
1340 | adds sp=16,sp |
1341 | ;; | |
1342 | ld8 r9=[sp] // load new ar.unat | |
4df8d22b | 1343 | mov.sptk b7=r8,ia64_native_leave_kernel |
1da177e4 LT |
1344 | ;; |
1345 | mov ar.unat=r9 | |
1346 | br.many b7 | |
1347 | END(sys_rt_sigreturn) | |
1348 | ||
1349 | GLOBAL_ENTRY(ia64_prepare_handle_unaligned) | |
1350 | .prologue | |
1351 | /* | |
1352 | * r16 = fake ar.pfs, we simply need to make sure privilege is still 0 | |
1353 | */ | |
1354 | mov r16=r0 | |
1355 | DO_SAVE_SWITCH_STACK | |
1356 | br.call.sptk.many rp=ia64_handle_unaligned // stack frame setup in ivt | |
1357 | .ret21: .body | |
1358 | DO_LOAD_SWITCH_STACK | |
1359 | br.cond.sptk.many rp // goes to ia64_leave_kernel | |
1360 | END(ia64_prepare_handle_unaligned) | |
1361 | ||
1362 | // | |
1363 | // unw_init_running(void (*callback)(info, arg), void *arg) | |
1364 | // | |
1365 | # define EXTRA_FRAME_SIZE ((UNW_FRAME_INFO_SIZE+15)&~15) | |
1366 | ||
1367 | GLOBAL_ENTRY(unw_init_running) | |
1368 | .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2) | |
1369 | alloc loc1=ar.pfs,2,3,3,0 | |
1370 | ;; | |
1371 | ld8 loc2=[in0],8 | |
1372 | mov loc0=rp | |
1373 | mov r16=loc1 | |
1374 | DO_SAVE_SWITCH_STACK | |
1375 | .body | |
1376 | ||
1377 | .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2) | |
1378 | .fframe IA64_SWITCH_STACK_SIZE+EXTRA_FRAME_SIZE | |
1379 | SWITCH_STACK_SAVES(EXTRA_FRAME_SIZE) | |
1380 | adds sp=-EXTRA_FRAME_SIZE,sp | |
1381 | .body | |
1382 | ;; | |
1383 | adds out0=16,sp // &info | |
1384 | mov out1=r13 // current | |
1385 | adds out2=16+EXTRA_FRAME_SIZE,sp // &switch_stack | |
1386 | br.call.sptk.many rp=unw_init_frame_info | |
1387 | 1: adds out0=16,sp // &info | |
1388 | mov b6=loc2 | |
1389 | mov loc2=gp // save gp across indirect function call | |
1390 | ;; | |
1391 | ld8 gp=[in0] | |
1392 | mov out1=in1 // arg | |
1393 | br.call.sptk.many rp=b6 // invoke the callback function | |
1394 | 1: mov gp=loc2 // restore gp | |
1395 | ||
1396 | // For now, we don't allow changing registers from within | |
1397 | // unw_init_running; if we ever want to allow that, we'd | |
1398 | // have to do a load_switch_stack here: | |
1399 | .restore sp | |
1400 | adds sp=IA64_SWITCH_STACK_SIZE+EXTRA_FRAME_SIZE,sp | |
1401 | ||
1402 | mov ar.pfs=loc1 | |
1403 | mov rp=loc0 | |
1404 | br.ret.sptk.many rp | |
1405 | END(unw_init_running) | |
1406 | ||
1407 | .rodata | |
1408 | .align 8 | |
1409 | .globl sys_call_table | |
1410 | sys_call_table: | |
1411 | data8 sys_ni_syscall // This must be sys_ni_syscall! See ivt.S. | |
1412 | data8 sys_exit // 1025 | |
1413 | data8 sys_read | |
1414 | data8 sys_write | |
1415 | data8 sys_open | |
1416 | data8 sys_close | |
1417 | data8 sys_creat // 1030 | |
1418 | data8 sys_link | |
1419 | data8 sys_unlink | |
1420 | data8 ia64_execve | |
1421 | data8 sys_chdir | |
1422 | data8 sys_fchdir // 1035 | |
1423 | data8 sys_utimes | |
1424 | data8 sys_mknod | |
1425 | data8 sys_chmod | |
1426 | data8 sys_chown | |
1427 | data8 sys_lseek // 1040 | |
1428 | data8 sys_getpid | |
1429 | data8 sys_getppid | |
1430 | data8 sys_mount | |
1431 | data8 sys_umount | |
1432 | data8 sys_setuid // 1045 | |
1433 | data8 sys_getuid | |
1434 | data8 sys_geteuid | |
1435 | data8 sys_ptrace | |
1436 | data8 sys_access | |
1437 | data8 sys_sync // 1050 | |
1438 | data8 sys_fsync | |
1439 | data8 sys_fdatasync | |
1440 | data8 sys_kill | |
1441 | data8 sys_rename | |
1442 | data8 sys_mkdir // 1055 | |
1443 | data8 sys_rmdir | |
1444 | data8 sys_dup | |
1134723e | 1445 | data8 sys_ia64_pipe |
1da177e4 LT |
1446 | data8 sys_times |
1447 | data8 ia64_brk // 1060 | |
1448 | data8 sys_setgid | |
1449 | data8 sys_getgid | |
1450 | data8 sys_getegid | |
1451 | data8 sys_acct | |
1452 | data8 sys_ioctl // 1065 | |
1453 | data8 sys_fcntl | |
1454 | data8 sys_umask | |
1455 | data8 sys_chroot | |
1456 | data8 sys_ustat | |
1457 | data8 sys_dup2 // 1070 | |
1458 | data8 sys_setreuid | |
1459 | data8 sys_setregid | |
1460 | data8 sys_getresuid | |
1461 | data8 sys_setresuid | |
1462 | data8 sys_getresgid // 1075 | |
1463 | data8 sys_setresgid | |
1464 | data8 sys_getgroups | |
1465 | data8 sys_setgroups | |
1466 | data8 sys_getpgid | |
1467 | data8 sys_setpgid // 1080 | |
1468 | data8 sys_setsid | |
1469 | data8 sys_getsid | |
1470 | data8 sys_sethostname | |
1471 | data8 sys_setrlimit | |
1472 | data8 sys_getrlimit // 1085 | |
1473 | data8 sys_getrusage | |
1474 | data8 sys_gettimeofday | |
1475 | data8 sys_settimeofday | |
1476 | data8 sys_select | |
1477 | data8 sys_poll // 1090 | |
1478 | data8 sys_symlink | |
1479 | data8 sys_readlink | |
1480 | data8 sys_uselib | |
1481 | data8 sys_swapon | |
1482 | data8 sys_swapoff // 1095 | |
1483 | data8 sys_reboot | |
1484 | data8 sys_truncate | |
1485 | data8 sys_ftruncate | |
1486 | data8 sys_fchmod | |
1487 | data8 sys_fchown // 1100 | |
1488 | data8 ia64_getpriority | |
1489 | data8 sys_setpriority | |
1490 | data8 sys_statfs | |
1491 | data8 sys_fstatfs | |
1492 | data8 sys_gettid // 1105 | |
1493 | data8 sys_semget | |
1494 | data8 sys_semop | |
1495 | data8 sys_semctl | |
1496 | data8 sys_msgget | |
1497 | data8 sys_msgsnd // 1110 | |
1498 | data8 sys_msgrcv | |
1499 | data8 sys_msgctl | |
1500 | data8 sys_shmget | |
7d87e14c | 1501 | data8 sys_shmat |
1da177e4 LT |
1502 | data8 sys_shmdt // 1115 |
1503 | data8 sys_shmctl | |
1504 | data8 sys_syslog | |
1505 | data8 sys_setitimer | |
1506 | data8 sys_getitimer | |
1507 | data8 sys_ni_syscall // 1120 /* was: ia64_oldstat */ | |
1508 | data8 sys_ni_syscall /* was: ia64_oldlstat */ | |
1509 | data8 sys_ni_syscall /* was: ia64_oldfstat */ | |
1510 | data8 sys_vhangup | |
1511 | data8 sys_lchown | |
1512 | data8 sys_remap_file_pages // 1125 | |
1513 | data8 sys_wait4 | |
1514 | data8 sys_sysinfo | |
1515 | data8 sys_clone | |
1516 | data8 sys_setdomainname | |
1517 | data8 sys_newuname // 1130 | |
1518 | data8 sys_adjtimex | |
1519 | data8 sys_ni_syscall /* was: ia64_create_module */ | |
1520 | data8 sys_init_module | |
1521 | data8 sys_delete_module | |
1522 | data8 sys_ni_syscall // 1135 /* was: sys_get_kernel_syms */ | |
1523 | data8 sys_ni_syscall /* was: sys_query_module */ | |
1524 | data8 sys_quotactl | |
1525 | data8 sys_bdflush | |
1526 | data8 sys_sysfs | |
1527 | data8 sys_personality // 1140 | |
1528 | data8 sys_ni_syscall // sys_afs_syscall | |
1529 | data8 sys_setfsuid | |
1530 | data8 sys_setfsgid | |
1531 | data8 sys_getdents | |
1532 | data8 sys_flock // 1145 | |
1533 | data8 sys_readv | |
1534 | data8 sys_writev | |
1535 | data8 sys_pread64 | |
1536 | data8 sys_pwrite64 | |
1537 | data8 sys_sysctl // 1150 | |
1538 | data8 sys_mmap | |
1539 | data8 sys_munmap | |
1540 | data8 sys_mlock | |
1541 | data8 sys_mlockall | |
1542 | data8 sys_mprotect // 1155 | |
1543 | data8 ia64_mremap | |
1544 | data8 sys_msync | |
1545 | data8 sys_munlock | |
1546 | data8 sys_munlockall | |
1547 | data8 sys_sched_getparam // 1160 | |
1548 | data8 sys_sched_setparam | |
1549 | data8 sys_sched_getscheduler | |
1550 | data8 sys_sched_setscheduler | |
1551 | data8 sys_sched_yield | |
1552 | data8 sys_sched_get_priority_max // 1165 | |
1553 | data8 sys_sched_get_priority_min | |
1554 | data8 sys_sched_rr_get_interval | |
1555 | data8 sys_nanosleep | |
1556 | data8 sys_nfsservctl | |
1557 | data8 sys_prctl // 1170 | |
1558 | data8 sys_getpagesize | |
1559 | data8 sys_mmap2 | |
1560 | data8 sys_pciconfig_read | |
1561 | data8 sys_pciconfig_write | |
1562 | data8 sys_perfmonctl // 1175 | |
1563 | data8 sys_sigaltstack | |
1564 | data8 sys_rt_sigaction | |
1565 | data8 sys_rt_sigpending | |
1566 | data8 sys_rt_sigprocmask | |
1567 | data8 sys_rt_sigqueueinfo // 1180 | |
1568 | data8 sys_rt_sigreturn | |
1569 | data8 sys_rt_sigsuspend | |
1570 | data8 sys_rt_sigtimedwait | |
1571 | data8 sys_getcwd | |
1572 | data8 sys_capget // 1185 | |
1573 | data8 sys_capset | |
1574 | data8 sys_sendfile64 | |
1575 | data8 sys_ni_syscall // sys_getpmsg (STREAMS) | |
1576 | data8 sys_ni_syscall // sys_putpmsg (STREAMS) | |
1577 | data8 sys_socket // 1190 | |
1578 | data8 sys_bind | |
1579 | data8 sys_connect | |
1580 | data8 sys_listen | |
1581 | data8 sys_accept | |
1582 | data8 sys_getsockname // 1195 | |
1583 | data8 sys_getpeername | |
1584 | data8 sys_socketpair | |
1585 | data8 sys_send | |
1586 | data8 sys_sendto | |
1587 | data8 sys_recv // 1200 | |
1588 | data8 sys_recvfrom | |
1589 | data8 sys_shutdown | |
1590 | data8 sys_setsockopt | |
1591 | data8 sys_getsockopt | |
1592 | data8 sys_sendmsg // 1205 | |
1593 | data8 sys_recvmsg | |
1594 | data8 sys_pivot_root | |
1595 | data8 sys_mincore | |
1596 | data8 sys_madvise | |
1597 | data8 sys_newstat // 1210 | |
1598 | data8 sys_newlstat | |
1599 | data8 sys_newfstat | |
1600 | data8 sys_clone2 | |
1601 | data8 sys_getdents64 | |
1602 | data8 sys_getunwind // 1215 | |
1603 | data8 sys_readahead | |
1604 | data8 sys_setxattr | |
1605 | data8 sys_lsetxattr | |
1606 | data8 sys_fsetxattr | |
1607 | data8 sys_getxattr // 1220 | |
1608 | data8 sys_lgetxattr | |
1609 | data8 sys_fgetxattr | |
1610 | data8 sys_listxattr | |
1611 | data8 sys_llistxattr | |
1612 | data8 sys_flistxattr // 1225 | |
1613 | data8 sys_removexattr | |
1614 | data8 sys_lremovexattr | |
1615 | data8 sys_fremovexattr | |
1616 | data8 sys_tkill | |
1617 | data8 sys_futex // 1230 | |
1618 | data8 sys_sched_setaffinity | |
1619 | data8 sys_sched_getaffinity | |
1620 | data8 sys_set_tid_address | |
1621 | data8 sys_fadvise64_64 | |
1622 | data8 sys_tgkill // 1235 | |
1623 | data8 sys_exit_group | |
1624 | data8 sys_lookup_dcookie | |
1625 | data8 sys_io_setup | |
1626 | data8 sys_io_destroy | |
1627 | data8 sys_io_getevents // 1240 | |
1628 | data8 sys_io_submit | |
1629 | data8 sys_io_cancel | |
1630 | data8 sys_epoll_create | |
1631 | data8 sys_epoll_ctl | |
1632 | data8 sys_epoll_wait // 1245 | |
1633 | data8 sys_restart_syscall | |
1634 | data8 sys_semtimedop | |
1635 | data8 sys_timer_create | |
1636 | data8 sys_timer_settime | |
1637 | data8 sys_timer_gettime // 1250 | |
1638 | data8 sys_timer_getoverrun | |
1639 | data8 sys_timer_delete | |
1640 | data8 sys_clock_settime | |
1641 | data8 sys_clock_gettime | |
1642 | data8 sys_clock_getres // 1255 | |
1643 | data8 sys_clock_nanosleep | |
1644 | data8 sys_fstatfs64 | |
1645 | data8 sys_statfs64 | |
1646 | data8 sys_mbind | |
1647 | data8 sys_get_mempolicy // 1260 | |
1648 | data8 sys_set_mempolicy | |
1649 | data8 sys_mq_open | |
1650 | data8 sys_mq_unlink | |
1651 | data8 sys_mq_timedsend | |
1652 | data8 sys_mq_timedreceive // 1265 | |
1653 | data8 sys_mq_notify | |
1654 | data8 sys_mq_getsetattr | |
a7956113 | 1655 | data8 sys_kexec_load |
1da177e4 LT |
1656 | data8 sys_ni_syscall // reserved for vserver |
1657 | data8 sys_waitid // 1270 | |
1658 | data8 sys_add_key | |
1659 | data8 sys_request_key | |
1660 | data8 sys_keyctl | |
22e2c507 JA |
1661 | data8 sys_ioprio_set |
1662 | data8 sys_ioprio_get // 1275 | |
742755a1 | 1663 | data8 sys_move_pages |
d108919b RL |
1664 | data8 sys_inotify_init |
1665 | data8 sys_inotify_add_watch | |
1666 | data8 sys_inotify_rm_watch | |
39743889 | 1667 | data8 sys_migrate_pages // 1280 |
9ed2ad86 KC |
1668 | data8 sys_openat |
1669 | data8 sys_mkdirat | |
1670 | data8 sys_mknodat | |
1671 | data8 sys_fchownat | |
1672 | data8 sys_futimesat // 1285 | |
1673 | data8 sys_newfstatat | |
1674 | data8 sys_unlinkat | |
1675 | data8 sys_renameat | |
1676 | data8 sys_linkat | |
1677 | data8 sys_symlinkat // 1290 | |
1678 | data8 sys_readlinkat | |
1679 | data8 sys_fchmodat | |
1680 | data8 sys_faccessat | |
e180583b | 1681 | data8 sys_pselect6 |
ad9e39c7 | 1682 | data8 sys_ppoll // 1295 |
9621a4ef | 1683 | data8 sys_unshare |
5274f052 | 1684 | data8 sys_splice |
5c55cd63 TL |
1685 | data8 sys_set_robust_list |
1686 | data8 sys_get_robust_list | |
d905b00b | 1687 | data8 sys_sync_file_range // 1300 |
70524490 | 1688 | data8 sys_tee |
912d35f8 | 1689 | data8 sys_vmsplice |
3d7559e6 | 1690 | data8 sys_fallocate |
86afa9eb | 1691 | data8 sys_getcpu |
472118e6 TL |
1692 | data8 sys_epoll_pwait // 1305 |
1693 | data8 sys_utimensat | |
ae67e498 | 1694 | data8 sys_signalfd |
4d672e7a | 1695 | data8 sys_ni_syscall |
ae67e498 | 1696 | data8 sys_eventfd |
ad9e39c7 TL |
1697 | data8 sys_timerfd_create // 1310 |
1698 | data8 sys_timerfd_settime | |
1699 | data8 sys_timerfd_gettime | |
3e4d0cab TL |
1700 | data8 sys_signalfd4 |
1701 | data8 sys_eventfd2 | |
1702 | data8 sys_epoll_create1 // 1315 | |
1703 | data8 sys_dup3 | |
1704 | data8 sys_pipe2 | |
1705 | data8 sys_inotify_init1 | |
1da177e4 LT |
1706 | |
1707 | .org sys_call_table + 8*NR_syscalls // guard against failures to increase NR_syscalls | |
4df8d22b | 1708 | #endif /* __IA64_ASM_PARAVIRTUALIZED_NATIVE */ |