1 /* Jump to a new context.
2 Copyright (C) 2002, 2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include <rtld-global-offsets.h>
22 #include <shlib-compat.h>
25 #include <asm/ptrace.h>
26 #include "ucontext_i.h"
34 lwz r31,_UC_REGS_PTR(r3)
37 * If this ucontext refers to the point where we were interrupted
38 * by a signal, we have to use the rt_sigreturn system call to
39 * return to the context so we get both LR and CTR restored.
41 * Otherwise, the context we are restoring is either just after
42 * a procedure call (getcontext/swapcontext) or at the beginning
43 * of a procedure call (makecontext), so we don't need to restore
44 * r0, xer, ctr. We don't restore r2 since it will be used as
47 lwz r0,_UC_GREGS+(PT_MSR*4)(r31)
51 /* Restore the signal mask */
53 addi r4,r3,_UC_SIGMASK
55 bl JUMPTARGET(__sigprocmask)
61 bl _GLOBAL_OFFSET_TABLE_@local-4
64 lwz r7,_rtld_global_ro@got(r7)
66 lwz r7,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r7)
68 lwz r7,_dl_hwcap@got(r7)
74 lwz r7,_dl_hwcap@l(r7)
76 andis. r7,r7,(PPC_FEATURE_HAS_ALTIVEC >> 16)
77 la r10,(_UC_VREGS)(r31)
174 /* Restore the floating-point registers */
175 lfd fp31,_UC_FREGS+(32*8)(r31)
176 lfd fp0,_UC_FREGS+(0*8)(r31)
178 lfd fp1,_UC_FREGS+(1*8)(r31)
179 lfd fp2,_UC_FREGS+(2*8)(r31)
180 lfd fp3,_UC_FREGS+(3*8)(r31)
181 lfd fp4,_UC_FREGS+(4*8)(r31)
182 lfd fp5,_UC_FREGS+(5*8)(r31)
183 lfd fp6,_UC_FREGS+(6*8)(r31)
184 lfd fp7,_UC_FREGS+(7*8)(r31)
185 lfd fp8,_UC_FREGS+(8*8)(r31)
186 lfd fp9,_UC_FREGS+(9*8)(r31)
187 lfd fp10,_UC_FREGS+(10*8)(r31)
188 lfd fp11,_UC_FREGS+(11*8)(r31)
189 lfd fp12,_UC_FREGS+(12*8)(r31)
190 lfd fp13,_UC_FREGS+(13*8)(r31)
191 lfd fp14,_UC_FREGS+(14*8)(r31)
192 lfd fp15,_UC_FREGS+(15*8)(r31)
193 lfd fp16,_UC_FREGS+(16*8)(r31)
194 lfd fp17,_UC_FREGS+(17*8)(r31)
195 lfd fp18,_UC_FREGS+(18*8)(r31)
196 lfd fp19,_UC_FREGS+(19*8)(r31)
197 lfd fp20,_UC_FREGS+(20*8)(r31)
198 lfd fp21,_UC_FREGS+(21*8)(r31)
199 lfd fp22,_UC_FREGS+(22*8)(r31)
200 lfd fp23,_UC_FREGS+(23*8)(r31)
201 lfd fp24,_UC_FREGS+(24*8)(r31)
202 lfd fp25,_UC_FREGS+(25*8)(r31)
203 lfd fp26,_UC_FREGS+(26*8)(r31)
204 lfd fp27,_UC_FREGS+(27*8)(r31)
205 lfd fp28,_UC_FREGS+(28*8)(r31)
206 lfd fp29,_UC_FREGS+(29*8)(r31)
207 lfd fp30,_UC_FREGS+(30*8)(r31)
208 lfd fp31,_UC_FREGS+(31*8)(r31)
210 /* Restore LR and CCR, and set CTR to the NIP value */
211 lwz r3,_UC_GREGS+(PT_LNK*4)(r31)
212 lwz r4,_UC_GREGS+(PT_NIP*4)(r31)
213 lwz r5,_UC_GREGS+(PT_CCR*4)(r31)
218 /* Restore the general registers */
219 lwz r1,_UC_GREGS+(PT_R1*4)(r31)
220 lwz r3,_UC_GREGS+(PT_R3*4)(r31)
221 lwz r4,_UC_GREGS+(PT_R4*4)(r31)
222 lwz r5,_UC_GREGS+(PT_R5*4)(r31)
223 lwz r6,_UC_GREGS+(PT_R6*4)(r31)
224 lwz r7,_UC_GREGS+(PT_R7*4)(r31)
225 lwz r8,_UC_GREGS+(PT_R8*4)(r31)
226 lwz r9,_UC_GREGS+(PT_R9*4)(r31)
227 lwz r10,_UC_GREGS+(PT_R10*4)(r31)
228 lwz r11,_UC_GREGS+(PT_R11*4)(r31)
229 lwz r12,_UC_GREGS+(PT_R12*4)(r31)
230 lwz r13,_UC_GREGS+(PT_R13*4)(r31)
231 lwz r14,_UC_GREGS+(PT_R14*4)(r31)
232 lwz r15,_UC_GREGS+(PT_R15*4)(r31)
233 lwz r16,_UC_GREGS+(PT_R16*4)(r31)
234 lwz r17,_UC_GREGS+(PT_R17*4)(r31)
235 lwz r18,_UC_GREGS+(PT_R18*4)(r31)
236 lwz r19,_UC_GREGS+(PT_R19*4)(r31)
237 lwz r20,_UC_GREGS+(PT_R20*4)(r31)
238 lwz r21,_UC_GREGS+(PT_R21*4)(r31)
239 lwz r22,_UC_GREGS+(PT_R22*4)(r31)
240 lwz r23,_UC_GREGS+(PT_R23*4)(r31)
241 lwz r24,_UC_GREGS+(PT_R24*4)(r31)
242 lwz r25,_UC_GREGS+(PT_R25*4)(r31)
243 lwz r26,_UC_GREGS+(PT_R26*4)(r31)
244 lwz r27,_UC_GREGS+(PT_R27*4)(r31)
245 lwz r28,_UC_GREGS+(PT_R28*4)(r31)
246 lwz r29,_UC_GREGS+(PT_R29*4)(r31)
247 lwz r30,_UC_GREGS+(PT_R30*4)(r31)
248 lwz r31,_UC_GREGS+(PT_R31*4)(r31)
261 li r0,SYS_ify(rt_sigreturn)
267 versioned_symbol (libc, __setcontext, setcontext, GLIBC_2_3_4)
269 #if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
272 ENTRY(__novec_setcontext)
277 lwz r31,_UC_REGS_PTR(r3)
280 * If this ucontext refers to the point where we were interrupted
281 * by a signal, we have to use the rt_sigreturn system call to
282 * return to the context so we get both LR and CTR restored.
284 * Otherwise, the context we are restoring is either just after
285 * a procedure call (getcontext/swapcontext) or at the beginning
286 * of a procedure call (makecontext), so we don't need to restore
287 * r0, xer, ctr. We don't restore r2 since it will be used as
290 lwz r0,_UC_GREGS+(PT_MSR*4)(r31)
292 bne L(novec_do_sigret)
294 /* Restore the signal mask */
296 addi r4,r3,_UC_SIGMASK
298 bl JUMPTARGET(__sigprocmask)
300 bne L(novec_error_exit)
302 /* Restore the floating-point registers */
303 lfd fp31,_UC_FREGS+(32*8)(r31)
304 lfd fp0,_UC_FREGS+(0*8)(r31)
306 lfd fp1,_UC_FREGS+(1*8)(r31)
307 lfd fp2,_UC_FREGS+(2*8)(r31)
308 lfd fp3,_UC_FREGS+(3*8)(r31)
309 lfd fp4,_UC_FREGS+(4*8)(r31)
310 lfd fp5,_UC_FREGS+(5*8)(r31)
311 lfd fp6,_UC_FREGS+(6*8)(r31)
312 lfd fp7,_UC_FREGS+(7*8)(r31)
313 lfd fp8,_UC_FREGS+(8*8)(r31)
314 lfd fp9,_UC_FREGS+(9*8)(r31)
315 lfd fp10,_UC_FREGS+(10*8)(r31)
316 lfd fp11,_UC_FREGS+(11*8)(r31)
317 lfd fp12,_UC_FREGS+(12*8)(r31)
318 lfd fp13,_UC_FREGS+(13*8)(r31)
319 lfd fp14,_UC_FREGS+(14*8)(r31)
320 lfd fp15,_UC_FREGS+(15*8)(r31)
321 lfd fp16,_UC_FREGS+(16*8)(r31)
322 lfd fp17,_UC_FREGS+(17*8)(r31)
323 lfd fp18,_UC_FREGS+(18*8)(r31)
324 lfd fp19,_UC_FREGS+(19*8)(r31)
325 lfd fp20,_UC_FREGS+(20*8)(r31)
326 lfd fp21,_UC_FREGS+(21*8)(r31)
327 lfd fp22,_UC_FREGS+(22*8)(r31)
328 lfd fp23,_UC_FREGS+(23*8)(r31)
329 lfd fp24,_UC_FREGS+(24*8)(r31)
330 lfd fp25,_UC_FREGS+(25*8)(r31)
331 lfd fp26,_UC_FREGS+(26*8)(r31)
332 lfd fp27,_UC_FREGS+(27*8)(r31)
333 lfd fp28,_UC_FREGS+(28*8)(r31)
334 lfd fp29,_UC_FREGS+(29*8)(r31)
335 lfd fp30,_UC_FREGS+(30*8)(r31)
336 lfd fp31,_UC_FREGS+(31*8)(r31)
338 /* Restore LR and CCR, and set CTR to the NIP value */
339 lwz r3,_UC_GREGS+(PT_LNK*4)(r31)
340 lwz r4,_UC_GREGS+(PT_NIP*4)(r31)
341 lwz r5,_UC_GREGS+(PT_CCR*4)(r31)
346 /* Restore the general registers */
347 lwz r1,_UC_GREGS+(PT_R1*4)(r31)
348 lwz r3,_UC_GREGS+(PT_R3*4)(r31)
349 lwz r4,_UC_GREGS+(PT_R4*4)(r31)
350 lwz r5,_UC_GREGS+(PT_R5*4)(r31)
351 lwz r6,_UC_GREGS+(PT_R6*4)(r31)
352 lwz r7,_UC_GREGS+(PT_R7*4)(r31)
353 lwz r8,_UC_GREGS+(PT_R8*4)(r31)
354 lwz r9,_UC_GREGS+(PT_R9*4)(r31)
355 lwz r10,_UC_GREGS+(PT_R10*4)(r31)
356 lwz r11,_UC_GREGS+(PT_R11*4)(r31)
357 lwz r12,_UC_GREGS+(PT_R12*4)(r31)
358 lwz r13,_UC_GREGS+(PT_R13*4)(r31)
359 lwz r14,_UC_GREGS+(PT_R14*4)(r31)
360 lwz r15,_UC_GREGS+(PT_R15*4)(r31)
361 lwz r16,_UC_GREGS+(PT_R16*4)(r31)
362 lwz r17,_UC_GREGS+(PT_R17*4)(r31)
363 lwz r18,_UC_GREGS+(PT_R18*4)(r31)
364 lwz r19,_UC_GREGS+(PT_R19*4)(r31)
365 lwz r20,_UC_GREGS+(PT_R20*4)(r31)
366 lwz r21,_UC_GREGS+(PT_R21*4)(r31)
367 lwz r22,_UC_GREGS+(PT_R22*4)(r31)
368 lwz r23,_UC_GREGS+(PT_R23*4)(r31)
369 lwz r24,_UC_GREGS+(PT_R24*4)(r31)
370 lwz r25,_UC_GREGS+(PT_R25*4)(r31)
371 lwz r26,_UC_GREGS+(PT_R26*4)(r31)
372 lwz r27,_UC_GREGS+(PT_R27*4)(r31)
373 lwz r28,_UC_GREGS+(PT_R28*4)(r31)
374 lwz r29,_UC_GREGS+(PT_R29*4)(r31)
375 lwz r30,_UC_GREGS+(PT_R30*4)(r31)
376 lwz r31,_UC_GREGS+(PT_R31*4)(r31)
389 li r0,SYS_ify(rt_sigreturn)
393 END (__novec_setcontext)
396 compat_symbol (libc, __novec_setcontext, setcontext, GLIBC_2_3_3)
400 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_3)
403 #include <bits/errno.h>
406 ENTRY (__setcontext_stub)
408 b JUMPTARGET(__syscall_error)
409 END (__setcontext_stub)
412 compat_symbol (libc, __setcontext_stub, setcontext, GLIBC_2_0)