projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| aebcf54c | 1 | /* Jump to a new context. |
| a334319f | 2 | Copyright (C) 2002, 2004 Free Software Foundation, Inc. |
| aebcf54c UD |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 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. | |
| 9 | ||
| 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. | |
| 14 | ||
| 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 | |
| a334319f UD |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 18 | 02111-1307 USA. */ | |
| aebcf54c UD |
19 | |
| 20 | #include <sysdep.h> | |
| 5ef6ae4b | 21 | #include <rtld-global-offsets.h> |
| 54ee14b3 | 22 | #include <shlib-compat.h> |
| aebcf54c UD |
23 | |
| 24 | #define __ASSEMBLY__ | |
| 25 | #include <asm/ptrace.h> | |
| 26 | #include "ucontext_i.h" | |
| 27 | ||
| a334319f UD |
28 | .machine "altivec" |
| 29 | ENTRY(__setcontext) | |
| 30 | mflr r0 | |
| 31 | stwu r1,-16(r1) | |
| 32 | stw r0,20(r1) | |
| 33 | stw r31,12(r1) | |
| 34 | lwz r31,_UC_REGS_PTR(r3) | |
| 35 | ||
| 36 | /* | |
| 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. | |
| 40 | * | |
| 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 | |
| 45 | * the TLS pointer. | |
| 46 | */ | |
| 47 | lwz r0,_UC_GREGS+(PT_MSR*4)(r31) | |
| 48 | cmpwi r0,0 | |
| 49 | bne L(do_sigret) | |
| 50 | ||
| 51 | /* Restore the signal mask */ | |
| 52 | li r5,0 | |
| 53 | addi r4,r3,_UC_SIGMASK | |
| 54 | li r3,SIG_SETMASK | |
| 55 | bl JUMPTARGET(__sigprocmask) | |
| 56 | cmpwi r3,0 | |
| 57 | bne L(error_exit) | |
| 58 | ||
| 59 | #ifdef PIC | |
| 60 | mflr r8 | |
| 61 | bl _GLOBAL_OFFSET_TABLE_@local-4 | |
| 62 | mflr r7 | |
| 63 | # ifdef SHARED | |
| 64 | lwz r7,_rtld_global_ro@got(r7) | |
| 65 | mtlr r8 | |
| 66 | lwz r7,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r7) | |
| 67 | # else | |
| 68 | lwz r7,_dl_hwcap@got(r7) | |
| 69 | mtlr r8 | |
| 70 | lwz r7,0(r7) | |
| 71 | # endif | |
| 5ef6ae4b | 72 | #else |
| a334319f UD |
73 | lis r7,_dl_hwcap@ha |
| 74 | lwz r7,_dl_hwcap@l(r7) | |
| 5ef6ae4b | 75 | #endif |
| a334319f UD |
76 | andis. r7,r7,(PPC_FEATURE_HAS_ALTIVEC >> 16) |
| 77 | la r10,(_UC_VREGS)(r31) | |
| 78 | beq L(has_no_vec) | |
| 79 | ||
| 80 | lwz r0,(32*16)(r10) | |
| 81 | li r9,(32*16) | |
| 82 | cmpwi r0,0 | |
| 83 | mtspr VRSAVE,r0 | |
| 84 | beq L(has_no_vec) | |
| 85 | ||
| 86 | lvx v19,r9,r10 | |
| 87 | la r9,(16)(r10) | |
| 88 | ||
| 89 | lvx v0,0,r10 | |
| 90 | lvx v1,0,r9 | |
| 91 | addi r10,r10,32 | |
| 92 | addi r9,r9,32 | |
| 93 | ||
| 94 | mtvscr v19 | |
| 95 | lvx v2,0,r10 | |
| 96 | lvx v3,0,r9 | |
| 97 | addi r10,r10,32 | |
| 98 | addi r9,r9,32 | |
| 99 | ||
| 100 | lvx v4,0,r10 | |
| 101 | lvx v5,0,r9 | |
| 102 | addi r10,r10,32 | |
| 103 | addi r9,r9,32 | |
| 104 | ||
| 105 | lvx v6,0,r10 | |
| 106 | lvx v7,0,r9 | |
| 107 | addi r10,r10,32 | |
| 108 | addi r9,r9,32 | |
| 109 | ||
| 110 | lvx v8,0,r10 | |
| 111 | lvx v9,0,r9 | |
| 112 | addi r10,r10,32 | |
| 113 | addi r9,r9,32 | |
| 114 | ||
| 115 | lvx v10,0,r10 | |
| 116 | lvx v11,0,r9 | |
| 117 | addi r10,r10,32 | |
| 118 | addi r9,r9,32 | |
| 119 | ||
| 120 | lvx v12,0,r10 | |
| 121 | lvx v13,0,r9 | |
| 122 | addi r10,r10,32 | |
| 123 | addi r9,r9,32 | |
| 124 | ||
| 125 | lvx v14,0,r10 | |
| 126 | lvx v15,0,r9 | |
| 127 | addi r10,r10,32 | |
| 128 | addi r9,r9,32 | |
| 129 | ||
| 130 | lvx v16,0,r10 | |
| 131 | lvx v17,0,r9 | |
| 132 | addi r10,r10,32 | |
| 133 | addi r9,r9,32 | |
| 134 | ||
| 135 | lvx v18,0,r10 | |
| 136 | lvx v19,0,r9 | |
| 137 | addi r10,r10,32 | |
| 138 | addi r9,r9,32 | |
| 139 | ||
| 140 | lvx v20,0,r10 | |
| 141 | lvx v21,0,r9 | |
| 142 | addi r10,r10,32 | |
| 143 | addi r9,r9,32 | |
| 144 | ||
| 145 | lvx v22,0,r10 | |
| 146 | lvx v23,0,r9 | |
| 147 | addi r10,r10,32 | |
| 148 | addi r9,r9,32 | |
| 149 | ||
| 150 | lvx v24,0,r10 | |
| 151 | lvx v25,0,r9 | |
| 152 | addi r10,r10,32 | |
| 153 | addi r9,r9,32 | |
| 154 | ||
| 155 | lvx v26,0,r10 | |
| 156 | lvx v27,0,r9 | |
| 157 | addi r10,r10,32 | |
| 158 | addi r9,r9,32 | |
| 159 | ||
| 160 | lvx v28,0,r10 | |
| 161 | lvx v29,0,r9 | |
| 162 | addi r10,r10,32 | |
| 163 | addi r9,r9,32 | |
| 164 | ||
| 165 | lvx v30,0,r10 | |
| 166 | lvx v31,0,r9 | |
| 167 | addi r10,r10,32 | |
| 168 | addi r9,r9,32 | |
| 169 | ||
| 170 | lvx v10,0,r10 | |
| 171 | lvx v11,0,r9 | |
| 172 | ||
| 173 | L(has_no_vec): | |
| 174 | /* Restore the floating-point registers */ | |
| 175 | lfd fp31,_UC_FREGS+(32*8)(r31) | |
| 176 | lfd fp0,_UC_FREGS+(0*8)(r31) | |
| 177 | mtfsf 0xff,fp31 | |
| 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) | |
| 209 | ||
| 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) | |
| 214 | mtlr r3 | |
| 215 | mtctr r4 | |
| 216 | mtcr r5 | |
| 217 | ||
| 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) | |
| 249 | ||
| 250 | bctr | |
| 251 | ||
| 252 | L(error_exit): | |
| 253 | lwz r31,12(r1) | |
| 254 | lwz r0,20(r1) | |
| 255 | addi r1,r1,16 | |
| 256 | mtlr r0 | |
| 257 | blr | |
| 258 | ||
| 259 | L(do_sigret): | |
| 260 | addi r1,r3,-0xd0 | |
| 261 | li r0,SYS_ify(rt_sigreturn) | |
| 262 | sc | |
| 263 | /* NOTREACHED */ | |
| 264 | ||
| 265 | END (__setcontext) | |
| aebcf54c | 266 | |
| 5ef6ae4b UD |
267 | versioned_symbol (libc, __setcontext, setcontext, GLIBC_2_3_4) |
| 268 | ||
| 269 | #if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4) | |
| 270 | ||
| d3a4a571 | 271 | compat_text_section |
| a334319f UD |
272 | ENTRY(__novec_setcontext) |
| 273 | mflr r0 | |
| 274 | stwu r1,-16(r1) | |
| 275 | stw r0,20(r1) | |
| 276 | stw r31,12(r1) | |
| 277 | lwz r31,_UC_REGS_PTR(r3) | |
| 278 | ||
| 279 | /* | |
| 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. | |
| 283 | * | |
| 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 | |
| 288 | * the TLS pointer. | |
| 289 | */ | |
| 290 | lwz r0,_UC_GREGS+(PT_MSR*4)(r31) | |
| 291 | cmpwi r0,0 | |
| 292 | bne L(novec_do_sigret) | |
| 293 | ||
| 294 | /* Restore the signal mask */ | |
| 295 | li r5,0 | |
| 296 | addi r4,r3,_UC_SIGMASK | |
| 297 | li r3,SIG_SETMASK | |
| 298 | bl JUMPTARGET(__sigprocmask) | |
| 299 | cmpwi r3,0 | |
| 300 | bne L(novec_error_exit) | |
| 301 | ||
| 302 | /* Restore the floating-point registers */ | |
| 303 | lfd fp31,_UC_FREGS+(32*8)(r31) | |
| 304 | lfd fp0,_UC_FREGS+(0*8)(r31) | |
| 305 | mtfsf 0xff,fp31 | |
| 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) | |
| 337 | ||
| 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) | |
| 342 | mtlr r3 | |
| 343 | mtctr r4 | |
| 344 | mtcr r5 | |
| 345 | ||
| 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) | |
| 377 | ||
| 378 | bctr | |
| 379 | ||
| 380 | L(novec_error_exit): | |
| 381 | lwz r31,12(r1) | |
| 382 | lwz r0,20(r1) | |
| 383 | addi r1,r1,16 | |
| 384 | mtlr r0 | |
| 385 | blr | |
| ef690add | 386 | |
| a334319f UD |
387 | L(novec_do_sigret): |
| 388 | addi r1,r3,-0xd0 | |
| 389 | li r0,SYS_ify(rt_sigreturn) | |
| 390 | sc | |
| 391 | /* NOTREACHED */ | |
| 5ef6ae4b | 392 | |
| a334319f | 393 | END (__novec_setcontext) |
| d3a4a571 | 394 | .previous |
| 5ef6ae4b UD |
395 | |
| 396 | compat_symbol (libc, __novec_setcontext, setcontext, GLIBC_2_3_3) | |
| 397 | ||
| 398 | #endif | |
| 54ee14b3 | 399 | |
| f89d6892 | 400 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_3) |
| 54ee14b3 | 401 | |
| a334319f UD |
402 | #define _ERRNO_H 1 |
| 403 | #include <bits/errno.h> | |
| 54ee14b3 | 404 | |
| d3a4a571 | 405 | compat_text_section |
| 54ee14b3 UD |
406 | ENTRY (__setcontext_stub) |
| 407 | li r3,ENOSYS | |
| a334319f | 408 | b JUMPTARGET(__syscall_error) |
| d3a4a571 UD |
409 | END (__setcontext_stub) |
| 410 | .previous | |
| 54ee14b3 | 411 | |
| f89d6892 | 412 | compat_symbol (libc, __setcontext_stub, setcontext, GLIBC_2_0) |
| 54ee14b3 UD |
413 | |
| 414 | #endif |