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| 1 | /* Assembler macros for PA-RISC. |
|---|---|
| 2 | Copyright (C) 1999-2022 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_HPPA_SYSDEP_H |
| 20 | #define _LINUX_HPPA_SYSDEP_H 1 |
| 21 | |
| 22 | #include <sysdeps/unix/sysdep.h> |
| 23 | #include <sysdeps/unix/sysv/linux/sysdep.h> |
| 24 | #include <sysdeps/hppa/sysdep.h> |
| 25 | |
| 26 | /* Defines RTLD_PRIVATE_ERRNO. */ |
| 27 | #include <dl-sysdep.h> |
| 28 | |
| 29 | #include <tls.h> |
| 30 | |
| 31 | /* In order to get __set_errno() definition in INLINE_SYSCALL. */ |
| 32 | #ifndef __ASSEMBLER__ |
| 33 | #include <errno.h> |
| 34 | #endif |
| 35 | |
| 36 | #undef ASM_LINE_SEP |
| 37 | #define ASM_LINE_SEP ! |
| 38 | |
| 39 | #undef SYS_ify |
| 40 | #define SYS_ify(syscall_name) (__NR_##syscall_name) |
| 41 | |
| 42 | /* The vfork, fork, and clone syscalls clobber r19 |
| 43 | * and r21. We list r21 as either clobbered or as an |
| 44 | * input to a 6-argument syscall. We must save and |
| 45 | * restore r19 in both PIC and non-PIC cases. |
| 46 | */ |
| 47 | /* WARNING: TREG must be a callee saves register so |
| 48 | that it doesn't have to be restored after a call |
| 49 | to another function */ |
| 50 | #define TREG 4 |
| 51 | #define SAVE_PIC(SREG) \ |
| 52 | copy %r19, SREG |
| 53 | #define LOAD_PIC(LREG) \ |
| 54 | copy LREG , %r19 |
| 55 | /* Inline assembly defines */ |
| 56 | #define TREG_ASM "%r4" /* Cant clobber r3, it holds framemarker */ |
| 57 | #define SAVE_ASM_PIC " copy %%r19, %" TREG_ASM "\n" |
| 58 | #define LOAD_ASM_PIC " copy %" TREG_ASM ", %%r19\n" |
| 59 | #define CLOB_TREG TREG_ASM , |
| 60 | #define PIC_REG_DEF register unsigned long __r19 asm("r19"); |
| 61 | #define PIC_REG_USE , "r" (__r19) |
| 62 | |
| 63 | #ifdef __ASSEMBLER__ |
| 64 | |
| 65 | /* Syntactic details of assembler. */ |
| 66 | |
| 67 | #define ALIGNARG(log2) log2 |
| 68 | |
| 69 | /* For Linux we can use the system call table in the header file |
| 70 | /usr/include/asm/unistd.h |
| 71 | of the kernel. But these symbols do not follow the SYS_* syntax |
| 72 | so we have to redefine the `SYS_ify' macro here. */ |
| 73 | #undef SYS_ify |
| 74 | #define SYS_ify(syscall_name) __NR_##syscall_name |
| 75 | |
| 76 | /* ELF-like local names start with `.L'. */ |
| 77 | #undef L |
| 78 | #define L(name) .L##name |
| 79 | |
| 80 | /* Linux uses a negative return value to indicate syscall errors, |
| 81 | unlike most Unices, which use the condition codes' carry flag. |
| 82 | |
| 83 | Since version 2.1 the return value of a system call might be |
| 84 | negative even if the call succeeded. E.g., the `lseek' system call |
| 85 | might return a large offset. Therefore we must not anymore test |
| 86 | for < 0, but test for a real error by making sure the value in %eax |
| 87 | is a real error number. Linus said he will make sure the no syscall |
| 88 | returns a value in -1 .. -4095 as a valid result so we can safely |
| 89 | test with -4095. */ |
| 90 | |
| 91 | /* We don't want the label for the error handle to be global when we define |
| 92 | it here. */ |
| 93 | /*#ifdef PIC |
| 94 | # define SYSCALL_ERROR_LABEL 0f |
| 95 | #else |
| 96 | # define SYSCALL_ERROR_LABEL syscall_error |
| 97 | #endif*/ |
| 98 | |
| 99 | /* Argument manipulation from the stack for preparing to |
| 100 | make a syscall */ |
| 101 | |
| 102 | #define DOARGS_0 /* nothing */ |
| 103 | #define DOARGS_1 /* nothing */ |
| 104 | #define DOARGS_2 /* nothing */ |
| 105 | #define DOARGS_3 /* nothing */ |
| 106 | #define DOARGS_4 /* nothing */ |
| 107 | #define DOARGS_5 ldw -52(%sp), %r22 ASM_LINE_SEP |
| 108 | #define DOARGS_6 DOARGS_5 ldw -56(%sp), %r21 ASM_LINE_SEP |
| 109 | |
| 110 | #define UNDOARGS_0 /* nothing */ |
| 111 | #define UNDOARGS_1 /* nothing */ |
| 112 | #define UNDOARGS_2 /* nothing */ |
| 113 | #define UNDOARGS_3 /* nothing */ |
| 114 | #define UNDOARGS_4 /* nothing */ |
| 115 | #define UNDOARGS_5 /* nothing */ |
| 116 | #define UNDOARGS_6 /* nothing */ |
| 117 | |
| 118 | /* Define an entry point visible from C. |
| 119 | |
| 120 | There is currently a bug in gdb which prevents us from specifying |
| 121 | incomplete stabs information. Fake some entries here which specify |
| 122 | the current source file. */ |
| 123 | #undef ENTRY |
| 124 | #define ENTRY(name) \ |
| 125 | .text ASM_LINE_SEP \ |
| 126 | .align ALIGNARG(4) ASM_LINE_SEP \ |
| 127 | .export C_SYMBOL_NAME(name) ASM_LINE_SEP \ |
| 128 | .type C_SYMBOL_NAME(name),@function ASM_LINE_SEP \ |
| 129 | cfi_startproc ASM_LINE_SEP \ |
| 130 | C_LABEL(name) ASM_LINE_SEP \ |
| 131 | .PROC ASM_LINE_SEP \ |
| 132 | .CALLINFO FRAME=64,CALLS,SAVE_RP,ENTRY_GR=3 ASM_LINE_SEP \ |
| 133 | .ENTRY ASM_LINE_SEP \ |
| 134 | /* SAVE_RP says we do */ ASM_LINE_SEP \ |
| 135 | stw %rp, -20(%sr0,%sp) ASM_LINE_SEP \ |
| 136 | .cfi_offset 2, -20 ASM_LINE_SEP \ |
| 137 | /*FIXME: Call mcount? (carefull with stack!) */ |
| 138 | |
| 139 | /* Some syscall wrappers do not call other functions, and |
| 140 | hence are classified as leaf, so add NO_CALLS for gdb */ |
| 141 | #define ENTRY_LEAF(name) \ |
| 142 | .text ASM_LINE_SEP \ |
| 143 | .align ALIGNARG(4) ASM_LINE_SEP \ |
| 144 | .export C_SYMBOL_NAME(name) ASM_LINE_SEP \ |
| 145 | .type C_SYMBOL_NAME(name),@function ASM_LINE_SEP \ |
| 146 | cfi_startproc ASM_LINE_SEP \ |
| 147 | C_LABEL(name) ASM_LINE_SEP \ |
| 148 | .PROC ASM_LINE_SEP \ |
| 149 | .CALLINFO FRAME=64,NO_CALLS,SAVE_RP,ENTRY_GR=3 ASM_LINE_SEP \ |
| 150 | .ENTRY ASM_LINE_SEP \ |
| 151 | /* SAVE_RP says we do */ ASM_LINE_SEP \ |
| 152 | stw %rp, -20(%sr0,%sp) ASM_LINE_SEP \ |
| 153 | .cfi_offset 2, -20 ASM_LINE_SEP \ |
| 154 | /*FIXME: Call mcount? (carefull with stack!) */ |
| 155 | |
| 156 | #undef END |
| 157 | #define END(name) \ |
| 158 | .EXIT ASM_LINE_SEP \ |
| 159 | .PROCEND ASM_LINE_SEP \ |
| 160 | cfi_endproc ASM_LINE_SEP \ |
| 161 | .size C_SYMBOL_NAME(name), .-C_SYMBOL_NAME(name) ASM_LINE_SEP |
| 162 | |
| 163 | /* If compiled for profiling, call `mcount' at the start |
| 164 | of each function. No, don't bother. gcc will put the |
| 165 | call in for us. */ |
| 166 | #define CALL_MCOUNT /* Do nothing. */ |
| 167 | |
| 168 | /* syscall wrappers consist of |
| 169 | #include <sysdep.h> |
| 170 | PSEUDO(...) |
| 171 | ret |
| 172 | PSEUDO_END(...) |
| 173 | |
| 174 | which means |
| 175 | ENTRY(name) |
| 176 | DO_CALL(...) |
| 177 | bv,n 0(2) |
| 178 | */ |
| 179 | |
| 180 | #undef PSEUDO |
| 181 | #define PSEUDO(name, syscall_name, args) \ |
| 182 | ENTRY (name) ASM_LINE_SEP \ |
| 183 | /* If necc. load args from stack */ ASM_LINE_SEP \ |
| 184 | DOARGS_##args ASM_LINE_SEP \ |
| 185 | DO_CALL (syscall_name, args) ASM_LINE_SEP \ |
| 186 | UNDOARGS_##args ASM_LINE_SEP |
| 187 | |
| 188 | #define ret \ |
| 189 | /* Return value set by ERRNO code */ ASM_LINE_SEP \ |
| 190 | bv,n 0(2) ASM_LINE_SEP |
| 191 | |
| 192 | #undef PSEUDO_END |
| 193 | #define PSEUDO_END(name) \ |
| 194 | END (name) |
| 195 | |
| 196 | /* We don't set the errno on the return from the syscall */ |
| 197 | #define PSEUDO_NOERRNO(name, syscall_name, args) \ |
| 198 | ENTRY_LEAF (name) ASM_LINE_SEP \ |
| 199 | DOARGS_##args ASM_LINE_SEP \ |
| 200 | DO_CALL_NOERRNO (syscall_name, args) ASM_LINE_SEP \ |
| 201 | UNDOARGS_##args ASM_LINE_SEP |
| 202 | |
| 203 | #define ret_NOERRNO ret |
| 204 | |
| 205 | #undef PSEUDO_END_NOERRNO |
| 206 | #define PSEUDO_END_NOERRNO(name) \ |
| 207 | END (name) |
| 208 | |
| 209 | /* This has to return the error value */ |
| 210 | #undef PSEUDO_ERRVAL |
| 211 | #define PSEUDO_ERRVAL(name, syscall_name, args) \ |
| 212 | ENTRY_LEAF (name) ASM_LINE_SEP \ |
| 213 | DOARGS_##args ASM_LINE_SEP \ |
| 214 | DO_CALL_ERRVAL (syscall_name, args) ASM_LINE_SEP \ |
| 215 | UNDOARGS_##args ASM_LINE_SEP |
| 216 | |
| 217 | #define ret_ERRVAL ret |
| 218 | |
| 219 | #undef PSEUDO_END_ERRVAL |
| 220 | #define PSEUDO_END_ERRVAL(name) \ |
| 221 | END(name) |
| 222 | |
| 223 | #undef JUMPTARGET |
| 224 | #define JUMPTARGET(name) name |
| 225 | #define SYSCALL_PIC_SETUP /* Nothing. */ |
| 226 | |
| 227 | |
| 228 | /* FIXME: This comment is not true. |
| 229 | * All the syscall assembly macros rely on finding the appropriate |
| 230 | SYSCALL_ERROR_LABEL or rather HANDLER. */ |
| 231 | |
| 232 | /* int * __errno_location(void) so you have to store your value |
| 233 | into the return address! */ |
| 234 | #define DEFAULT_SYSCALL_ERROR_HANDLER \ |
| 235 | .import __errno_location,code ASM_LINE_SEP \ |
| 236 | /* branch to errno handler */ ASM_LINE_SEP \ |
| 237 | bl __errno_location,%rp ASM_LINE_SEP |
| 238 | |
| 239 | /* Here are the myriad of configuration options that the above can |
| 240 | work for... what we've done is provide the framework for future |
| 241 | changes if required to each section */ |
| 242 | |
| 243 | #ifdef PIC |
| 244 | # if RTLD_PRIVATE_ERRNO |
| 245 | # define SYSCALL_ERROR_HANDLER DEFAULT_SYSCALL_ERROR_HANDLER |
| 246 | # else /* !RTLD_PRIVATE_ERRNO */ |
| 247 | # if defined _LIBC_REENTRANT |
| 248 | # define SYSCALL_ERROR_HANDLER DEFAULT_SYSCALL_ERROR_HANDLER |
| 249 | # else /* !_LIBC_REENTRANT */ |
| 250 | # define SYSCALL_ERROR_HANDLER DEFAULT_SYSCALL_ERROR_HANDLER |
| 251 | # endif /* _LIBC_REENTRANT */ |
| 252 | # endif /* RTLD_PRIVATE_ERRNO */ |
| 253 | #else |
| 254 | # ifndef _LIBC_REENTRANT |
| 255 | # define SYSCALL_ERROR_HANDLER DEFAULT_SYSCALL_ERROR_HANDLER |
| 256 | # else |
| 257 | # define SYSCALL_ERROR_HANDLER DEFAULT_SYSCALL_ERROR_HANDLER |
| 258 | # endif |
| 259 | #endif |
| 260 | |
| 261 | |
| 262 | /* Linux takes system call arguments in registers: |
| 263 | syscall number gr20 |
| 264 | arg 1 gr26 |
| 265 | arg 2 gr25 |
| 266 | arg 3 gr24 |
| 267 | arg 4 gr23 |
| 268 | arg 5 gr22 |
| 269 | arg 6 gr21 |
| 270 | |
| 271 | The compiler calls us by the C convention: |
| 272 | syscall number in the DO_CALL macro |
| 273 | arg 1 gr26 |
| 274 | arg 2 gr25 |
| 275 | arg 3 gr24 |
| 276 | arg 4 gr23 |
| 277 | arg 5 -52(sp) |
| 278 | arg 6 -56(sp) |
| 279 | |
| 280 | gr22 and gr21 are caller-saves, so we can just load the arguments |
| 281 | there and generally be happy. */ |
| 282 | |
| 283 | /* the cmpb...no_error code below inside DO_CALL |
| 284 | * is intended to mimic the if (__sys_res...) |
| 285 | * code inside INLINE_SYSCALL |
| 286 | */ |
| 287 | #define NO_ERROR -0x1000 |
| 288 | |
| 289 | #undef DO_CALL |
| 290 | #define DO_CALL(syscall_name, args) \ |
| 291 | /* Create a frame */ ASM_LINE_SEP \ |
| 292 | stwm TREG, 64(%sp) ASM_LINE_SEP \ |
| 293 | .cfi_def_cfa_offset -64 ASM_LINE_SEP \ |
| 294 | .cfi_offset TREG, 0 ASM_LINE_SEP \ |
| 295 | stw %sp, -4(%sp) ASM_LINE_SEP \ |
| 296 | stw %r19, -32(%sp) ASM_LINE_SEP \ |
| 297 | .cfi_offset 19, 32 ASM_LINE_SEP \ |
| 298 | /* Save r19 */ ASM_LINE_SEP \ |
| 299 | SAVE_PIC(TREG) ASM_LINE_SEP \ |
| 300 | /* Do syscall, delay loads # */ ASM_LINE_SEP \ |
| 301 | ble 0x100(%sr2,%r0) ASM_LINE_SEP \ |
| 302 | ldi SYS_ify (syscall_name), %r20 ASM_LINE_SEP \ |
| 303 | ldi NO_ERROR,%r1 ASM_LINE_SEP \ |
| 304 | cmpb,>>=,n %r1,%ret0,L(pre_end) ASM_LINE_SEP \ |
| 305 | /* Restore r19 from TREG */ ASM_LINE_SEP \ |
| 306 | LOAD_PIC(TREG) /* delay */ ASM_LINE_SEP \ |
| 307 | SYSCALL_ERROR_HANDLER ASM_LINE_SEP \ |
| 308 | /* Use TREG for temp storage */ ASM_LINE_SEP \ |
| 309 | copy %ret0, TREG /* delay */ ASM_LINE_SEP \ |
| 310 | /* OPTIMIZE: Don't reload r19 */ ASM_LINE_SEP \ |
| 311 | /* do a -1*syscall_ret0 */ ASM_LINE_SEP \ |
| 312 | sub %r0, TREG, TREG ASM_LINE_SEP \ |
| 313 | /* Store into errno location */ ASM_LINE_SEP \ |
| 314 | stw TREG, 0(%sr0,%ret0) ASM_LINE_SEP \ |
| 315 | /* return -1 as error */ ASM_LINE_SEP \ |
| 316 | ldo -1(%r0), %ret0 ASM_LINE_SEP \ |
| 317 | L(pre_end): ASM_LINE_SEP \ |
| 318 | /* Restore our frame, restoring TREG */ ASM_LINE_SEP \ |
| 319 | ldwm -64(%sp), TREG ASM_LINE_SEP \ |
| 320 | /* Restore return pointer */ ASM_LINE_SEP \ |
| 321 | ldw -20(%sp),%rp ASM_LINE_SEP |
| 322 | |
| 323 | /* We do nothing with the return, except hand it back to someone else */ |
| 324 | #undef DO_CALL_NOERRNO |
| 325 | #define DO_CALL_NOERRNO(syscall_name, args) \ |
| 326 | /* No need to store r19 */ ASM_LINE_SEP \ |
| 327 | ble 0x100(%sr2,%r0) ASM_LINE_SEP \ |
| 328 | ldi SYS_ify (syscall_name), %r20 ASM_LINE_SEP \ |
| 329 | /* Caller will restore r19 */ ASM_LINE_SEP |
| 330 | |
| 331 | /* Here, we return the ERRVAL in assembly, note we don't call the |
| 332 | error handler function, but we do 'negate' the return _IF_ |
| 333 | it's an error. Not sure if this is the right semantic. */ |
| 334 | |
| 335 | #undef DO_CALL_ERRVAL |
| 336 | #define DO_CALL_ERRVAL(syscall_name, args) \ |
| 337 | /* No need to store r19 */ ASM_LINE_SEP \ |
| 338 | ble 0x100(%sr2,%r0) ASM_LINE_SEP \ |
| 339 | ldi SYS_ify (syscall_name), %r20 ASM_LINE_SEP \ |
| 340 | /* Caller will restore r19 */ ASM_LINE_SEP \ |
| 341 | ldi NO_ERROR,%r1 ASM_LINE_SEP \ |
| 342 | cmpb,>>=,n %r1,%ret0,0f ASM_LINE_SEP \ |
| 343 | sub %r0, %ret0, %ret0 ASM_LINE_SEP \ |
| 344 | 0: ASM_LINE_SEP |
| 345 | |
| 346 | |
| 347 | #else |
| 348 | |
| 349 | /* GCC has to be warned that a syscall may clobber all the ABI |
| 350 | registers listed as "caller-saves", see page 8, Table 2 |
| 351 | in section 2.2.6 of the PA-RISC RUN-TIME architecture |
| 352 | document. However! r28 is the result and will conflict with |
| 353 | the clobber list so it is left out. Also the input arguments |
| 354 | registers r20 -> r26 will conflict with the list so they |
| 355 | are treated specially. Although r19 is clobbered by the syscall |
| 356 | we cannot say this because it would violate ABI, thus we say |
| 357 | TREG is clobbered and use that register to save/restore r19 |
| 358 | across the syscall. */ |
| 359 | |
| 360 | #define CALL_CLOB_REGS "%r1", "%r2", CLOB_TREG \ |
| 361 | "%r20", "%r29", "%r31" |
| 362 | |
| 363 | /* Similar to INLINE_SYSCALL but we don't set errno */ |
| 364 | #undef INTERNAL_SYSCALL |
| 365 | #define INTERNAL_SYSCALL(name, nr, args...) \ |
| 366 | ({ \ |
| 367 | long __sys_res; \ |
| 368 | { \ |
| 369 | LOAD_ARGS_##nr(args) \ |
| 370 | register unsigned long __res asm("r28"); \ |
| 371 | PIC_REG_DEF \ |
| 372 | LOAD_REGS_##nr \ |
| 373 | /* FIXME: HACK save/load r19 around syscall */ \ |
| 374 | asm volatile( \ |
| 375 | SAVE_ASM_PIC \ |
| 376 | " ble 0x100(%%sr2, %%r0)\n" \ |
| 377 | " ldi %1, %%r20\n" \ |
| 378 | LOAD_ASM_PIC \ |
| 379 | : "=r" (__res) \ |
| 380 | : "i" (SYS_ify(name)) PIC_REG_USE ASM_ARGS_##nr \ |
| 381 | : "memory", CALL_CLOB_REGS CLOB_ARGS_##nr \ |
| 382 | ); \ |
| 383 | __sys_res = (long)__res; \ |
| 384 | } \ |
| 385 | __sys_res; \ |
| 386 | }) |
| 387 | |
| 388 | |
| 389 | /* The _NCS variant allows non-constant syscall numbers. */ |
| 390 | #undef INTERNAL_SYSCALL_NCS |
| 391 | #define INTERNAL_SYSCALL_NCS(name, nr, args...) \ |
| 392 | ({ \ |
| 393 | long __sys_res; \ |
| 394 | { \ |
| 395 | LOAD_ARGS_##nr(args) \ |
| 396 | register unsigned long __res asm("r28"); \ |
| 397 | PIC_REG_DEF \ |
| 398 | LOAD_REGS_##nr \ |
| 399 | /* FIXME: HACK save/load r19 around syscall */ \ |
| 400 | asm volatile( \ |
| 401 | SAVE_ASM_PIC \ |
| 402 | " ble 0x100(%%sr2, %%r0)\n" \ |
| 403 | " copy %1, %%r20\n" \ |
| 404 | LOAD_ASM_PIC \ |
| 405 | : "=r" (__res) \ |
| 406 | : "r" (name) PIC_REG_USE ASM_ARGS_##nr \ |
| 407 | : "memory", CALL_CLOB_REGS CLOB_ARGS_##nr \ |
| 408 | ); \ |
| 409 | __sys_res = (long)__res; \ |
| 410 | } \ |
| 411 | __sys_res; \ |
| 412 | }) |
| 413 | |
| 414 | #define LOAD_ARGS_0() |
| 415 | #define LOAD_REGS_0 |
| 416 | #define LOAD_ARGS_1(a1) \ |
| 417 | register unsigned long __x26 = (unsigned long)(a1); \ |
| 418 | LOAD_ARGS_0() |
| 419 | #define LOAD_REGS_1 \ |
| 420 | register unsigned long __r26 __asm__("r26") = __x26; \ |
| 421 | LOAD_REGS_0 |
| 422 | #define LOAD_ARGS_2(a1,a2) \ |
| 423 | register unsigned long __x25 = (unsigned long)(a2); \ |
| 424 | LOAD_ARGS_1(a1) |
| 425 | #define LOAD_REGS_2 \ |
| 426 | register unsigned long __r25 __asm__("r25") = __x25; \ |
| 427 | LOAD_REGS_1 |
| 428 | #define LOAD_ARGS_3(a1,a2,a3) \ |
| 429 | register unsigned long __x24 = (unsigned long)(a3); \ |
| 430 | LOAD_ARGS_2(a1,a2) |
| 431 | #define LOAD_REGS_3 \ |
| 432 | register unsigned long __r24 __asm__("r24") = __x24; \ |
| 433 | LOAD_REGS_2 |
| 434 | #define LOAD_ARGS_4(a1,a2,a3,a4) \ |
| 435 | register unsigned long __x23 = (unsigned long)(a4); \ |
| 436 | LOAD_ARGS_3(a1,a2,a3) |
| 437 | #define LOAD_REGS_4 \ |
| 438 | register unsigned long __r23 __asm__("r23") = __x23; \ |
| 439 | LOAD_REGS_3 |
| 440 | #define LOAD_ARGS_5(a1,a2,a3,a4,a5) \ |
| 441 | register unsigned long __x22 = (unsigned long)(a5); \ |
| 442 | LOAD_ARGS_4(a1,a2,a3,a4) |
| 443 | #define LOAD_REGS_5 \ |
| 444 | register unsigned long __r22 __asm__("r22") = __x22; \ |
| 445 | LOAD_REGS_4 |
| 446 | #define LOAD_ARGS_6(a1,a2,a3,a4,a5,a6) \ |
| 447 | register unsigned long __x21 = (unsigned long)(a6); \ |
| 448 | LOAD_ARGS_5(a1,a2,a3,a4,a5) |
| 449 | #define LOAD_REGS_6 \ |
| 450 | register unsigned long __r21 __asm__("r21") = __x21; \ |
| 451 | LOAD_REGS_5 |
| 452 | |
| 453 | /* Even with zero args we use r20 for the syscall number */ |
| 454 | #define ASM_ARGS_0 |
| 455 | #define ASM_ARGS_1 ASM_ARGS_0, "r" (__r26) |
| 456 | #define ASM_ARGS_2 ASM_ARGS_1, "r" (__r25) |
| 457 | #define ASM_ARGS_3 ASM_ARGS_2, "r" (__r24) |
| 458 | #define ASM_ARGS_4 ASM_ARGS_3, "r" (__r23) |
| 459 | #define ASM_ARGS_5 ASM_ARGS_4, "r" (__r22) |
| 460 | #define ASM_ARGS_6 ASM_ARGS_5, "r" (__r21) |
| 461 | |
| 462 | /* The registers not listed as inputs but clobbered */ |
| 463 | #define CLOB_ARGS_6 |
| 464 | #define CLOB_ARGS_5 CLOB_ARGS_6, "%r21" |
| 465 | #define CLOB_ARGS_4 CLOB_ARGS_5, "%r22" |
| 466 | #define CLOB_ARGS_3 CLOB_ARGS_4, "%r23" |
| 467 | #define CLOB_ARGS_2 CLOB_ARGS_3, "%r24" |
| 468 | #define CLOB_ARGS_1 CLOB_ARGS_2, "%r25" |
| 469 | #define CLOB_ARGS_0 CLOB_ARGS_1, "%r26" |
| 470 | |
| 471 | #endif /* __ASSEMBLER__ */ |
| 472 | |
| 473 | /* Pointer mangling is not yet supported for HPPA. */ |
| 474 | #define PTR_MANGLE(var) (void) (var) |
| 475 | #define PTR_DEMANGLE(var) (void) (var) |
| 476 | |
| 477 | #define SINGLE_THREAD_BY_GLOBAL 1 |
| 478 | |
| 479 | #endif /* _LINUX_HPPA_SYSDEP_H */ |
| 480 |
Warning: That file was not part of the compilation database. It may have many parsing errors.