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| 1 | /* Assembly macros for C-SKY. |
|---|---|
| 2 | Copyright (C) 2018-2022 Free Software Foundation, Inc. |
| 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, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _LINUX_CSKY_SYSDEP_H |
| 20 | #define _LINUX_CSKY_SYSDEP_H 1 |
| 21 | |
| 22 | /* There is some commonality. */ |
| 23 | #include <sysdeps/unix/sysv/linux/generic/sysdep.h> |
| 24 | #include <sysdeps/unix/sysv/linux/sysdep.h> |
| 25 | #include <sysdeps/csky/sysdep.h> |
| 26 | |
| 27 | /* Defines RTLD_PRIVATE_ERRNO and USE_DL_SYSINFO. */ |
| 28 | #include <dl-sysdep.h> |
| 29 | |
| 30 | #include <tls.h> |
| 31 | |
| 32 | /* In order to get __set_errno() definition in INLINE_SYSCALL. */ |
| 33 | #ifndef __ASSEMBLER__ |
| 34 | # include <errno.h> |
| 35 | #endif |
| 36 | |
| 37 | #undef SYS_ify |
| 38 | #define SYS_ify(syscall_name) (__NR_##syscall_name) |
| 39 | |
| 40 | #ifdef __ASSEMBLER__ |
| 41 | /* Linux uses a negative return value to indicate syscall errors, |
| 42 | unlike most Unices, which use the condition codes' carry flag. |
| 43 | |
| 44 | Since version 2.1 the return value of a system call might be |
| 45 | negative even if the call succeeded. E.g., the `lseek' system call |
| 46 | might return a large offset. Therefore we must not anymore test |
| 47 | for < 0, but test for a real error by making sure the value in R0 |
| 48 | is a real error number. Linus said he will make sure the no syscall |
| 49 | returns a value in -1 .. -4095 as a valid result so we can safely |
| 50 | test with -4095. */ |
| 51 | |
| 52 | # undef PSEUDO |
| 53 | # define PSEUDO(name, syscall_name, args) \ |
| 54 | .text; \ |
| 55 | ENTRY (name); \ |
| 56 | DO_CALL (syscall_name, args); |
| 57 | |
| 58 | # define GETGB \ |
| 59 | grs t0, .Lgetpc; \ |
| 60 | .Lgetpc: \ |
| 61 | lrw gb, .Lgetpc@GOTPC; \ |
| 62 | addu gb, t0; |
| 63 | |
| 64 | # if IS_IN (libc) |
| 65 | # ifdef __PIC__ |
| 66 | # define PSEUDO_RET \ |
| 67 | btsti a0, 31; \ |
| 68 | bf 1f; \ |
| 69 | subi sp, 8; \ |
| 70 | st.w lr, (sp); \ |
| 71 | st.w gb, (sp, 4); \ |
| 72 | GETGB; \ |
| 73 | lrw a2, SYSCALL_ERROR@PLT; \ |
| 74 | add a2, gb; \ |
| 75 | ld.w a2, (a2); \ |
| 76 | jsr a2; \ |
| 77 | ld.w lr, (sp); \ |
| 78 | ld.w gb, (sp, 4); \ |
| 79 | addi sp, 8; \ |
| 80 | 1: \ |
| 81 | rts |
| 82 | # else |
| 83 | # define PSEUDO_RET \ |
| 84 | btsti a0, 31; \ |
| 85 | bf 1f; \ |
| 86 | jmpi SYSCALL_ERROR; \ |
| 87 | 1: \ |
| 88 | rts |
| 89 | # endif |
| 90 | # else |
| 91 | # ifdef __PIC__ |
| 92 | # define PSEUDO_RET \ |
| 93 | btsti a0, 31; \ |
| 94 | bf 1f; \ |
| 95 | subi sp, 8; \ |
| 96 | st.w lr, (sp); \ |
| 97 | st.w gb, (sp, 4); \ |
| 98 | GETGB; \ |
| 99 | bsr SYSCALL_ERROR; \ |
| 100 | ld.w lr, (sp); \ |
| 101 | ld.w gb, (sp, 4); \ |
| 102 | addi sp, 8; \ |
| 103 | 1: \ |
| 104 | rts |
| 105 | # else |
| 106 | # define PSEUDO_RET \ |
| 107 | btsti a0, 31; \ |
| 108 | bt SYSCALL_ERROR; \ |
| 109 | rts |
| 110 | # endif |
| 111 | # endif |
| 112 | |
| 113 | # undef ret |
| 114 | # define ret PSEUDO_RET |
| 115 | |
| 116 | # undef PSEUDO_END |
| 117 | # define PSEUDO_END(name) \ |
| 118 | .align 4; \ |
| 119 | SYSCALL_ERROR_HANDLER; \ |
| 120 | END (name) |
| 121 | |
| 122 | # undef PSEUDO_NOERRNO |
| 123 | # define PSEUDO_NOERRNO(name, syscall_name, args) \ |
| 124 | .text; \ |
| 125 | ENTRY (name); \ |
| 126 | DO_CALL (syscall_name, args) |
| 127 | |
| 128 | # define PSEUDO_RET_NOERRNO rts |
| 129 | |
| 130 | # undef ret_NOERRNO |
| 131 | # define ret_NOERRNO PSEUDO_RET_NOERRNO |
| 132 | |
| 133 | # undef PSEUDO_END_NOERRNO |
| 134 | # define PSEUDO_END_NOERRNO(name) END (name) |
| 135 | |
| 136 | /* The function has to return the error code. */ |
| 137 | # undef PSEUDO_ERRVAL |
| 138 | # define PSEUDO_ERRVAL(name, syscall_name, args) \ |
| 139 | .text; \ |
| 140 | ENTRY (name) \ |
| 141 | DO_CALL (syscall_name, args); \ |
| 142 | not a0; \ |
| 143 | addi a0, 1 |
| 144 | |
| 145 | # undef PSEUDO_END_ERRVAL |
| 146 | # define PSEUDO_END_ERRVAL(name) END (name) |
| 147 | |
| 148 | # define ret_ERRVAL rts |
| 149 | |
| 150 | # if !IS_IN (libc) |
| 151 | # define SYSCALL_ERROR __local_syscall_error |
| 152 | # if RTLD_PRIVATE_ERRNO |
| 153 | # ifdef __PIC__ |
| 154 | # define SYSCALL_ERROR_HANDLER \ |
| 155 | __local_syscall_error: \ |
| 156 | lrw a1, rtld_errno@PLT; \ |
| 157 | addu a1, gb; \ |
| 158 | ldw a1, (a1); \ |
| 159 | rsubi a0, 0; \ |
| 160 | stw a0, (a1); \ |
| 161 | bmaski a0, 0; \ |
| 162 | rts |
| 163 | # else /* __PIC__ */ |
| 164 | # define SYSCALL_ERROR_HANDLER \ |
| 165 | __local_syscall_error: \ |
| 166 | lrw a1, rtld_errno; \ |
| 167 | rsubi a0, 0; \ |
| 168 | stw a0, (a1); \ |
| 169 | bmaski a0, 0; \ |
| 170 | rts |
| 171 | # endif /* __PIC__ */ |
| 172 | # else /* !RTLD_PRIVATE_ERRNO */ |
| 173 | # ifdef __PIC__ |
| 174 | # define SYSCALL_ERROR_HANDLER \ |
| 175 | __local_syscall_error: \ |
| 176 | subi sp, 8; \ |
| 177 | stw a0, (sp, 0); \ |
| 178 | stw r15, (sp, 4); \ |
| 179 | lrw a1, __errno_location@PLT; \ |
| 180 | add a1, gb; \ |
| 181 | ldw a1, (a1); \ |
| 182 | jsr a1; \ |
| 183 | ldw a1, (sp, 0); /* load errno*/ \ |
| 184 | ldw r15, (sp, 4); \ |
| 185 | addi sp, 8; \ |
| 186 | movi a2, 0; \ |
| 187 | rsub a1, a1, a2; \ |
| 188 | stw a1, (a0); \ |
| 189 | bmaski a0, 0; \ |
| 190 | rts |
| 191 | # else |
| 192 | # define SYSCALL_ERROR_HANDLER \ |
| 193 | __local_syscall_error: \ |
| 194 | subi sp, 8; \ |
| 195 | stw a0, (sp, 0); \ |
| 196 | stw r15, (sp, 4); \ |
| 197 | lrw a1, __errno_location; \ |
| 198 | jsr a1; \ |
| 199 | ldw a1, (sp, 0); /* load errno */ \ |
| 200 | ldw r15, (sp, 4); \ |
| 201 | addi sp, 8; \ |
| 202 | movi a2, 0; \ |
| 203 | rsub a1, a1, a2; \ |
| 204 | stw a1, (a0); \ |
| 205 | bmaski a0, 0; \ |
| 206 | rts |
| 207 | # endif /* __PIC__ */ |
| 208 | # endif/* RTLD_PRIVATE_ERROR */ |
| 209 | # else |
| 210 | # define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */ |
| 211 | # define SYSCALL_ERROR __syscall_error |
| 212 | # endif/* IS_IN (libc) */ |
| 213 | |
| 214 | /* define DO_CALL */ |
| 215 | # undef DO_CALL |
| 216 | # define DO_CALL(syscall_name, args) \ |
| 217 | DOARGS_##args; \ |
| 218 | lrw r7, SYS_ify(syscall_name); \ |
| 219 | trap 0; \ |
| 220 | UNDOARGS_##args |
| 221 | |
| 222 | # undef DOARGS_0 |
| 223 | # define DOARGS_0 \ |
| 224 | subi sp, 8; \ |
| 225 | cfi_adjust_cfa_offset (8); \ |
| 226 | stw r7, (sp, 0); \ |
| 227 | cfi_rel_offset (r7, 0); |
| 228 | |
| 229 | # undef DOARGS_1 |
| 230 | # define DOARGS_1 DOARGS_0 |
| 231 | # undef DOARGS_2 |
| 232 | # define DOARGS_2 DOARGS_0 |
| 233 | # undef DOARGS_3 |
| 234 | # define DOARGS_3 DOARGS_0 |
| 235 | # undef DOARGS_4 |
| 236 | # define DOARGS_4 DOARGS_0 |
| 237 | # undef DOARGS_5 |
| 238 | # define DOARGS_5 \ |
| 239 | subi sp, 8; \ |
| 240 | cfi_adjust_cfa_offset (8); \ |
| 241 | stw r7, (sp, 0); \ |
| 242 | cfi_rel_offset (7, 0); \ |
| 243 | stw r4, (sp, 4); \ |
| 244 | cfi_rel_offset (4, 4); \ |
| 245 | ldw r4, (sp, 8) |
| 246 | # undef DOARGS_6 |
| 247 | # define DOARGS_6 \ |
| 248 | subi sp, 16; \ |
| 249 | cfi_adjust_cfa_offset (16); \ |
| 250 | stw r7, (sp, 0); \ |
| 251 | cfi_rel_offset (7, 0); \ |
| 252 | stw r4, (sp, 4); \ |
| 253 | cfi_rel_offset (4, 4); \ |
| 254 | stw r5, (sp, 8); \ |
| 255 | cfi_rel_offset (5, 8); \ |
| 256 | ldw r4, (sp, 16); \ |
| 257 | ldw r5, (sp, 20) |
| 258 | |
| 259 | # undef UNDOARGS_0 |
| 260 | # define UNDOARGS_0 \ |
| 261 | ldw r7, (sp, 0); \ |
| 262 | cfi_restore (r7); \ |
| 263 | addi sp, 8; \ |
| 264 | cfi_adjust_cfa_offset (-8); |
| 265 | |
| 266 | # undef UNDOARGS_1 |
| 267 | # define UNDOARGS_1 UNDOARGS_0 |
| 268 | # undef UNDOARGS_2 |
| 269 | # define UNDOARGS_2 UNDOARGS_0 |
| 270 | # undef UNDOARGS_3 |
| 271 | # define UNDOARGS_3 UNDOARGS_0 |
| 272 | # undef UNDOARGS_4 |
| 273 | # define UNDOARGS_4 UNDOARGS_0 |
| 274 | # undef UNDOARGS_5 |
| 275 | # define UNDOARGS_5 \ |
| 276 | ldw r7, (sp, 0); \ |
| 277 | cfi_restore (r4); \ |
| 278 | ldw r4, (sp, 4); \ |
| 279 | cfi_restore (r4); \ |
| 280 | addi sp, 8; \ |
| 281 | cfi_adjust_cfa_offset (-8); |
| 282 | |
| 283 | # undef UNDOARGS_6 |
| 284 | # define UNDOARGS_6 \ |
| 285 | ldw r7, (sp, 0); \ |
| 286 | cfi_restore (r7); \ |
| 287 | ldw r4, (sp, 4); \ |
| 288 | cfi_restore (r4); \ |
| 289 | ldw r5, (sp, 8); \ |
| 290 | cfi_restore (r5); \ |
| 291 | addi sp, 16; \ |
| 292 | cfi_adjust_cfa_offset (-16); |
| 293 | |
| 294 | #else /* not __ASSEMBLER__ */ |
| 295 | |
| 296 | # undef INTERNAL_SYSCALL_RAW |
| 297 | # define INTERNAL_SYSCALL_RAW0(name, dummy...) \ |
| 298 | ({unsigned int __sys_result; \ |
| 299 | { \ |
| 300 | register int _a1 __asm__ ("a0"), _nr __asm__ ("r7"); \ |
| 301 | _nr = name; \ |
| 302 | __asm__ __volatile__ ("trap 0 \n\t" \ |
| 303 | : "=r" (_a1) \ |
| 304 | : "r" (_nr) \ |
| 305 | : "memory"); \ |
| 306 | __sys_result = _a1; \ |
| 307 | } \ |
| 308 | (int) __sys_result; }) |
| 309 | |
| 310 | # define INTERNAL_SYSCALL_RAW1(name, arg1) \ |
| 311 | ({unsigned int __sys_result; \ |
| 312 | register int _tmp_arg1 = (int)(arg1); \ |
| 313 | { \ |
| 314 | register int _a1 __asm__ ("a0"), _nr __asm__ ("r7"); \ |
| 315 | _a1 = _tmp_arg1; \ |
| 316 | _nr = name; \ |
| 317 | __asm__ __volatile__ ("trap 0 \n\t" \ |
| 318 | : "=r" (_a1) \ |
| 319 | : "r" (_nr), "r" (_a1) \ |
| 320 | : "memory"); \ |
| 321 | __sys_result = _a1; \ |
| 322 | } \ |
| 323 | (int) __sys_result; }) |
| 324 | |
| 325 | # define INTERNAL_SYSCALL_RAW2(name, arg1, arg2) \ |
| 326 | ({unsigned int __sys_result; \ |
| 327 | register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \ |
| 328 | { \ |
| 329 | register int _nr __asm__ ("r7"); \ |
| 330 | register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \ |
| 331 | _a1 = _tmp_arg1, _a2 = _tmp_arg2; \ |
| 332 | _nr = name; \ |
| 333 | __asm__ __volatile__ ("trap 0 \n\t" \ |
| 334 | : "=r" (_a1) \ |
| 335 | : "r" (_nr), "r" (_a1), "r" (_a2) \ |
| 336 | : "memory"); \ |
| 337 | __sys_result = _a1; \ |
| 338 | } \ |
| 339 | (int) __sys_result; }) |
| 340 | |
| 341 | # define INTERNAL_SYSCALL_RAW3(name, arg1, arg2, arg3) \ |
| 342 | ({unsigned int __sys_result; \ |
| 343 | register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \ |
| 344 | register int _tmp_arg3 = (int)(arg3); \ |
| 345 | { \ |
| 346 | register int _nr __asm__ ("r7"); \ |
| 347 | register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \ |
| 348 | register int _a3 __asm__ ("a2"); \ |
| 349 | _a1 = _tmp_arg1; \ |
| 350 | _a2 = _tmp_arg2; \ |
| 351 | _a3 = _tmp_arg3; \ |
| 352 | _nr = name; \ |
| 353 | __asm__ __volatile__ ("trap 0 \n\t" \ |
| 354 | : "=r" (_a1) \ |
| 355 | : "r" (_nr), "r" (_a1), "r" (_a2), \ |
| 356 | "r" (_a3) \ |
| 357 | : "memory"); \ |
| 358 | __sys_result = _a1; \ |
| 359 | } \ |
| 360 | (int) __sys_result; }) |
| 361 | |
| 362 | # define INTERNAL_SYSCALL_RAW4(name, arg1, arg2, arg3, arg4) \ |
| 363 | ({unsigned int __sys_result; \ |
| 364 | register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \ |
| 365 | register int _tmp_arg3 = (int)(arg3), _tmp_arg4 = (int)(arg4); \ |
| 366 | { \ |
| 367 | register int _nr __asm__ ("r7"); \ |
| 368 | register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \ |
| 369 | register int _a3 __asm__ ("a2"), _a4 __asm__ ("a3"); \ |
| 370 | _a1 = _tmp_arg1, _a2 = _tmp_arg2, _a3 = _tmp_arg3; \ |
| 371 | _a4 = _tmp_arg4; \ |
| 372 | _nr = name; \ |
| 373 | __asm__ __volatile__ ("trap 0 \n\t" \ |
| 374 | : "=r" (_a1) \ |
| 375 | : "r" (_nr), "r" (_a1), "r" (_a2), \ |
| 376 | "r" (_a3), "r" (_a4) \ |
| 377 | : "memory"); \ |
| 378 | __sys_result = _a1; \ |
| 379 | } \ |
| 380 | (int) __sys_result; }) |
| 381 | |
| 382 | # define INTERNAL_SYSCALL_RAW5(name, arg1, arg2, arg3, arg4, \ |
| 383 | arg5) \ |
| 384 | ({unsigned int __sys_result; \ |
| 385 | register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \ |
| 386 | register int _tmp_arg3 = (int)(arg3), _tmp_arg4 = (int)(arg4); \ |
| 387 | register int _tmp_arg5 = (int)(arg5); \ |
| 388 | { \ |
| 389 | register int _nr __asm__ ("r7"); \ |
| 390 | register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \ |
| 391 | register int _a3 __asm__ ("a2"), _a4 __asm__ ("a3"); \ |
| 392 | register int _a5 __asm__ ("r4"); \ |
| 393 | _a1 = _tmp_arg1, _a2 = _tmp_arg2, _a3 = _tmp_arg3; \ |
| 394 | _a4 = _tmp_arg4, _a5 = _tmp_arg5; \ |
| 395 | _nr = name; \ |
| 396 | __asm__ __volatile__ ("trap 0 \n\t" \ |
| 397 | : "=r" (_a1) \ |
| 398 | : "r" (_nr), "r" (_a1), "r" (_a2), \ |
| 399 | "r" (_a3), "r" (_a4), "r" (_a5) \ |
| 400 | : "memory"); \ |
| 401 | __sys_result = _a1; \ |
| 402 | } \ |
| 403 | (int) __sys_result; }) |
| 404 | |
| 405 | # define INTERNAL_SYSCALL_RAW6(name, arg1, arg2, arg3, arg4, \ |
| 406 | arg5, arg6) \ |
| 407 | ({unsigned int __sys_result; \ |
| 408 | register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \ |
| 409 | register int _tmp_arg3 = (int)(arg3), _tmp_arg4 = (int)(arg4); \ |
| 410 | register int _tmp_arg5 = (int)(arg5), _tmp_arg6 = (int)(arg6); \ |
| 411 | { \ |
| 412 | register int _nr __asm__ ("r7"); \ |
| 413 | register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \ |
| 414 | register int _a3 __asm__ ("a2"), _a4 __asm__ ("a3"); \ |
| 415 | register int _a5 __asm__ ("r4"), _a6 __asm__ ("r5"); \ |
| 416 | _a1 = _tmp_arg1, _a2 = _tmp_arg2, _a3 = _tmp_arg3; \ |
| 417 | _a4 = _tmp_arg4, _a5 = _tmp_arg5, _a6 = _tmp_arg6; \ |
| 418 | _nr = name; \ |
| 419 | __asm__ __volatile__ ("trap 0 \n\t" \ |
| 420 | : "=r" (_a1) \ |
| 421 | : "r" (_nr), "r" (_a1), "r" (_a2), \ |
| 422 | "r" (_a3), "r" (_a4), "r" (_a5), \ |
| 423 | "r" (_a6) \ |
| 424 | : "memory"); \ |
| 425 | __sys_result = _a1; \ |
| 426 | } \ |
| 427 | (int) __sys_result; }) |
| 428 | |
| 429 | # define INTERNAL_SYSCALL_RAW7(name, arg1, arg2, arg3, arg4, \ |
| 430 | arg5, arg6, arg7) \ |
| 431 | ({unsigned int __sys_result; \ |
| 432 | register int _tmp_arg1 = (int)(arg1), _tmp_arg2 = (int)(arg2); \ |
| 433 | register int _tmp_arg3 = (int)(arg3), _tmp_arg4 = (int)(arg4); \ |
| 434 | register int _tmp_arg5 = (int)(arg5), _tmp_arg6 = (int)(arg6); \ |
| 435 | register int _tmp_arg7 = (int)(arg7); \ |
| 436 | { \ |
| 437 | register int _nr __asm__ ("r7"); \ |
| 438 | register int _a1 __asm__ ("a0"), _a2 __asm__ ("a1"); \ |
| 439 | register int _a3 __asm__ ("a2"), _a4 __asm__ ("a3"); \ |
| 440 | register int _a5 __asm__ ("r4"), _a6 __asm__ ("r5"); \ |
| 441 | register int _a7 __asm__ ("r6"); \ |
| 442 | _a1 = _tmp_arg1, _a2 = _tmp_arg2, _a3 = _tmp_arg3; \ |
| 443 | _a4 = _tmp_arg4, _a5 = _tmp_arg5, _a6 = _tmp_arg6; \ |
| 444 | _a7 = _tmp_arg7; \ |
| 445 | _nr = name; \ |
| 446 | __asm__ __volatile__ ("trap 0 \n\t" \ |
| 447 | : "=r" (_a1) \ |
| 448 | : "r" (_nr), "r" (_a1), "r" (_a2), \ |
| 449 | "r" (_a3), "r" (_a4), "r" (_a5), \ |
| 450 | "r" (_a6), "r" (_a7) \ |
| 451 | : "memory"); \ |
| 452 | __sys_result = _a1; \ |
| 453 | } \ |
| 454 | (int) __sys_result; }) |
| 455 | |
| 456 | # undef INTERNAL_SYSCALL |
| 457 | # define INTERNAL_SYSCALL(name, nr, args...) \ |
| 458 | INTERNAL_SYSCALL_RAW##nr(SYS_ify(name), args) |
| 459 | |
| 460 | # undef INTERNAL_SYSCALL_NCS |
| 461 | # define INTERNAL_SYSCALL_NCS(number, nr, args...) \ |
| 462 | INTERNAL_SYSCALL_RAW##nr (number, args) |
| 463 | |
| 464 | #undef HAVE_INTERNAL_BRK_ADDR_SYMBOL |
| 465 | #define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 |
| 466 | |
| 467 | #endif /* __ASSEMBLER__ */ |
| 468 | |
| 469 | /* Pointer mangling support. */ |
| 470 | #if (IS_IN (rtld) \ |
| 471 | || (!defined SHARED && (IS_IN (libc) || IS_IN (libpthread)))) |
| 472 | # ifdef __ASSEMBLER__ |
| 473 | # define PTR_MANGLE(dst, src, guard) \ |
| 474 | grs t0, 1f; \ |
| 475 | 1: \ |
| 476 | lrw guard, 1b@GOTPC; \ |
| 477 | addu t0, guard; \ |
| 478 | lrw guard, __pointer_chk_guard_local@GOT; \ |
| 479 | ldr.w guard, (t0, guard << 0); \ |
| 480 | ldw guard, (guard, 0); \ |
| 481 | xor dst, src, guard; |
| 482 | # define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard) |
| 483 | # define PTR_MANGLE2(dst, src, guard) \ |
| 484 | xor dst, src, guard |
| 485 | # define PTR_DEMANGLE2(dst, src, guard) PTR_MANGLE2 (dst, src, guard) |
| 486 | # else |
| 487 | extern uintptr_t __pointer_chk_guard_local; |
| 488 | # define PTR_MANGLE(var) \ |
| 489 | (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard_local) |
| 490 | # define PTR_DEMANGLE(var) PTR_MANGLE (var) |
| 491 | # endif |
| 492 | #else |
| 493 | # ifdef __ASSEMBLER__ |
| 494 | # define PTR_MANGLE(dst, src, guard) \ |
| 495 | grs t0, 1f; \ |
| 496 | 1: \ |
| 497 | lrw guard, 1b@GOTPC; \ |
| 498 | addu t0, guard; \ |
| 499 | lrw guard, __pointer_chk_guard@GOT; \ |
| 500 | ldr.w guard, (t0, guard << 0); \ |
| 501 | ldw guard, (guard, 0); \ |
| 502 | xor dst, src, guard; |
| 503 | # define PTR_DEMANGLE(dst, src, guard) PTR_MANGLE (dst, src, guard) |
| 504 | # define PTR_MANGLE2(dst, src, guard) \ |
| 505 | xor dst, src, guard |
| 506 | # define PTR_DEMANGLE2(dst, src, guard) PTR_MANGLE2 (dst, src, guard) |
| 507 | # else |
| 508 | extern uintptr_t __pointer_chk_guard; |
| 509 | # define PTR_MANGLE(var) \ |
| 510 | (var) = (__typeof (var)) ((uintptr_t) (var) ^ __pointer_chk_guard) |
| 511 | # define PTR_DEMANGLE(var) PTR_MANGLE (var) |
| 512 | # endif |
| 513 | #endif |
| 514 | |
| 515 | #endif /* linux/csky/sysdep.h */ |
| 516 |
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