Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 | /* * Copyright (c) 1999-2011 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* Copyright (c) 1992 NeXT Computer, Inc. All rights reserved. * * File: SYS.h * * Definition of the user side of the UNIX system call interface * for M98K. * * Errors are flagged by the location of the trap return (ie., which * instruction is executed upon rfi): * * SC PC + 4: Error (typically branch to cerror()) * SC PC + 8: Success * * HISTORY * 18-Nov-92 Ben Fathi (benf@next.com) * Ported to m98k. * * 9-Jan-92 Peter King (king@next.com) * Created. */ #include <sys/syscall.h> #if defined(__i386__) #include <architecture/i386/asm_help.h> #include <mach/i386/syscall_sw.h> /* * We have two entry points. int's is used for syscalls which need to preserve * %ecx across the call, or return a 64-bit value in %eax:%edx. sysenter is used * for the majority of syscalls which just return a value in %eax. */ #define UNIX_SYSCALL_SYSENTER call __sysenter_trap #define UNIX_SYSCALL(name, nargs) \ .globl tramp_cerror ;\ LEAF(_##name, 0) ;\ movl $ SYS_##name, %eax ;\ UNIX_SYSCALL_SYSENTER ;\ jnb 2f ;\ BRANCH_EXTERN(tramp_cerror) ;\ 2: #define UNIX_SYSCALL_INT(name, nargs) \ .globl tramp_cerror ;\ LEAF(_##name, 0) ;\ movl $ SYS_##name, %eax ;\ UNIX_SYSCALL_TRAP ;\ jnb 2f ;\ BRANCH_EXTERN(tramp_cerror) ;\ 2: #if defined(__SYSCALL_32BIT_ARG_BYTES) && ((__SYSCALL_32BIT_ARG_BYTES >= 4) && (__SYSCALL_32BIT_ARG_BYTES <= 20)) #define UNIX_SYSCALL_NONAME(name, nargs, cerror) \ movl $(SYS_##name | (__SYSCALL_32BIT_ARG_BYTES << I386_SYSCALL_ARG_BYTES_SHIFT)), %eax ;\ UNIX_SYSCALL_SYSENTER ;\ jnb 2f ;\ BRANCH_EXTERN(tramp_##cerror) ;\ 2: #else /* __SYSCALL_32BIT_ARG_BYTES < 4 || > 20 */ #define UNIX_SYSCALL_NONAME(name, nargs, cerror) \ movl $ SYS_##name, %eax ;\ UNIX_SYSCALL_SYSENTER ;\ jnb 2f ;\ BRANCH_EXTERN(tramp_##cerror) ;\ 2: #endif #define UNIX_SYSCALL_INT_NONAME(name, nargs) \ .globl tramp_cerror_nocancel ;\ movl $ SYS_##name, %eax ;\ UNIX_SYSCALL_TRAP ;\ jnb 2f ;\ BRANCH_EXTERN(tramp_cerror_nocancel) ;\ 2: #define PSEUDO(pseudo, name, nargs, cerror) \ LEAF(pseudo, 0) ;\ UNIX_SYSCALL_NONAME(name, nargs, cerror) #define PSEUDO_INT(pseudo, name, nargs) \ LEAF(pseudo, 0) ;\ UNIX_SYSCALL_INT_NONAME(name, nargs) #define __SYSCALL2(pseudo, name, nargs, cerror) \ PSEUDO(pseudo, name, nargs, cerror) ;\ ret #define __SYSCALL(pseudo, name, nargs) \ PSEUDO(pseudo, name, nargs, cerror) ;\ ret #define __SYSCALL_INT(pseudo, name, nargs) \ PSEUDO_INT(pseudo, name, nargs) ;\ ret #elif defined(__x86_64__) #include <architecture/i386/asm_help.h> #include <mach/i386/syscall_sw.h> #define UNIX_SYSCALL_SYSCALL \ movq %rcx, %r10 ;\ syscall #define UNIX_SYSCALL(name, nargs) \ .globl cerror ;\ LEAF(_##name, 0) ;\ movl $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax ;\ UNIX_SYSCALL_SYSCALL ;\ jnb 2f ;\ movq %rax, %rdi ;\ BRANCH_EXTERN(_cerror) ;\ 2: #define UNIX_SYSCALL_NONAME(name, nargs, cerror) \ .globl cerror ;\ movl $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax ;\ UNIX_SYSCALL_SYSCALL ;\ jnb 2f ;\ movq %rax, %rdi ;\ BRANCH_EXTERN(_##cerror) ;\ 2: #define PSEUDO(pseudo, name, nargs, cerror) \ LEAF(pseudo, 0) ;\ UNIX_SYSCALL_NONAME(name, nargs, cerror) #define __SYSCALL2(pseudo, name, nargs, cerror) \ PSEUDO(pseudo, name, nargs, cerror) ;\ ret ;\ UNWIND_EPILOGUE #define __SYSCALL(pseudo, name, nargs) \ PSEUDO(pseudo, name, nargs, cerror) ;\ ret ;\ UNWIND_EPILOGUE #elif defined(__arm__) #include <architecture/arm/asm_help.h> #include <mach/arm/syscall_sw.h> /* * ARM system call interface: * * swi 0x80 * args: r0-r6 * return code: r0 * on error, carry bit is set in the psr, otherwise carry bit is cleared. */ /* * Macros. */ /* * until we update the architecture project, these live here */ #if defined(__DYNAMIC__) #define MI_GET_ADDRESS(reg,var) \ ldr reg, 4f ;\ 3: ldr reg, [pc, reg] ;\ b 5f ;\ 4: .long 6f - (3b + 8) ;\ 5: ;\ .non_lazy_symbol_pointer ;\ 6: ;\ .indirect_symbol var ;\ .long 0 ;\ .text ;\ .align 2 #else #define MI_GET_ADDRESS(reg,var) \ ldr reg, 3f ;\ b 4f ;\ 3: .long var ;\ 4: #endif #if defined(__DYNAMIC__) #define MI_BRANCH_EXTERNAL(var) \ .globl var ;\ MI_GET_ADDRESS(ip, var) ;\ bx ip #else #define MI_BRANCH_EXTERNAL(var) ;\ .globl var ;\ b var #endif #if defined(__DYNAMIC__) #define MI_CALL_EXTERNAL(var) \ .globl var ;\ MI_GET_ADDRESS(ip,var) ;\ blx ip #else #define MI_CALL_EXTERNAL(var) \ .globl var ;\ bl var #endif #define MI_ENTRY_POINT(name) \ .text ;\ .align 2 ;\ .globl name ;\ name: /* load the syscall number into r12 and trap */ #define DO_SYSCALL(num) \ .if (((num) & 0xff) == (num)) ;\ mov r12, #(num) ;\ .elseif (((num) & 0x3fc) == (num)) ;\ mov r12, #(num) ;\ .else ;\ mov r12, #((num) & 0xffffff00) /* top half of the syscall number */ ;\ orr r12, r12, #((num) & 0xff) /* bottom half */ ;\ .endif ;\ swi #SWI_SYSCALL /* simple syscalls (0 to 4 args) */ #define SYSCALL_0to4(name, cerror) \ MI_ENTRY_POINT(_##name) ;\ DO_SYSCALL(SYS_##name) ;\ bxcc lr /* return if carry is clear (no error) */ ; \ 1: MI_BRANCH_EXTERNAL(_##cerror) /* syscalls with 5 args is different, because of the single arg register load */ #define SYSCALL_5(name, cerror) \ MI_ENTRY_POINT(_##name) ;\ mov ip, sp /* save a pointer to the args */ ; \ stmfd sp!, { r4-r5 } /* save r4-r5 */ ;\ ldr r4, [ip] /* load 5th arg */ ; \ DO_SYSCALL(SYS_##name) ;\ ldmfd sp!, { r4-r5 } /* restore r4-r5 */ ; \ bxcc lr /* return if carry is clear (no error) */ ; \ 1: MI_BRANCH_EXTERNAL(_##cerror) /* syscalls with 6 to 12 args. kernel may have to read from stack */ #define SYSCALL_6to12(name, save_regs, arg_regs, cerror) \ MI_ENTRY_POINT(_##name) ;\ mov ip, sp /* save a pointer to the args */ ; \ stmfd sp!, { save_regs } /* callee saved regs */ ;\ ldmia ip, { arg_regs } /* load arg regs */ ; \ DO_SYSCALL(SYS_##name) ;\ ldmfd sp!, { save_regs } /* restore callee saved regs */ ; \ bxcc lr /* return if carry is clear (no error) */ ; \ 1: MI_BRANCH_EXTERNAL(_##cerror) #define COMMA , #if __BIGGEST_ALIGNMENT__ > 4 /* For the armv7k ABI, the alignment requirements may add padding. So we * let the kernel figure it out and push extra on the stack to avoid un-needed * copy-ins */ /* We'll also use r8 for moving arguments */ #define SYSCALL_0(name) SYSCALL_0to4(name) #define SYSCALL_1(name) SYSCALL_0to4(name) #define SYSCALL_2(name) SYSCALL_0to4(name) #define SYSCALL_3(name) SYSCALL_0to4(name) #define SYSCALL_4(name) SYSCALL_6to12(name, r4-r5, r4-r5) #undef SYSCALL_5 #define SYSCALL_5(name) SYSCALL_6to12(name, r4-r5, r4-r5) #define SYSCALL_6(name) SYSCALL_6to12(name, r4-r6 COMMA r8, r4-r6 COMMA r8) #define SYSCALL_7(name) SYSCALL_6to12(name, r4-r6 COMMA r8, r4-r6 COMMA r8) #define SYSCALL_8(name) SYSCALL_6to12(name, r4-r6 COMMA r8, r4-r6 COMMA r8) #define SYSCALL_12(name) SYSCALL_6to12(name, r4-r6 COMMA r8, r4-r6 COMMA r8) #else // !(__BIGGEST_ALIGNMENT__ > 4) (the normal arm32 ABI case) #define SYSCALL_0(name) SYSCALL_0to4(name) #define SYSCALL_1(name) SYSCALL_0to4(name) #define SYSCALL_2(name) SYSCALL_0to4(name) #define SYSCALL_3(name) SYSCALL_0to4(name) #define SYSCALL_4(name) SYSCALL_0to4(name) /* SYSCALL_5 declared above */ #define SYSCALL_6(name) SYSCALL_6to12(name, r4-r5, r4-r5) #define SYSCALL_7(name) SYSCALL_6to12(name, r4-r6 COMMA r8, r4-r6) #define SYSCALL_8(name) SYSCALL_6to12(name, r4-r6 COMMA r8, r4-r6) /* 8th on stack */ #define SYSCALL_12(name) SYSCALL_6to12(name, r4-r6 COMMA r8, r4-r6) /* 8th-12th on stack */ #endif // __BIGGEST_ALIGNMENT__ > 4 /* select the appropriate syscall code, based on the number of arguments */ #ifndef __SYSCALL_32BIT_ARG_BYTES #define SYSCALL(name, nargs, cerror) SYSCALL_##nargs(name, cerror) #define SYSCALL_NONAME(name, nargs, cerror) SYSCALL_NONAME_##nargs(name, cerror) #else #if __SYSCALL_32BIT_ARG_BYTES < 20 #define SYSCALL(name, nargs, cerror) SYSCALL_0to4(name, cerror) #define SYSCALL_NONAME(name, nargs, cerror) SYSCALL_NONAME_0to4(name, cerror) #elif __SYSCALL_32BIT_ARG_BYTES == 20 #define SYSCALL(name, nargs, cerror) SYSCALL_5(name, cerror) #define SYSCALL_NONAME(name, nargs, cerror) SYSCALL_NONAME_5(name, cerror) #elif __SYSCALL_32BIT_ARG_BYTES == 24 #define SYSCALL(name, nargs, cerror) SYSCALL_6(name, cerror) #define SYSCALL_NONAME(name, nargs, cerror) SYSCALL_NONAME_6(name, cerror) #elif __SYSCALL_32BIT_ARG_BYTES == 28 #define SYSCALL(name, nargs, cerror) SYSCALL_7(name, cerror) #define SYSCALL_NONAME(name, nargs, cerror) SYSCALL_NONAME_7(name, cerror) #elif __SYSCALL_32BIT_ARG_BYTES == 32 #define SYSCALL(name, nargs, cerror) SYSCALL_8(name, cerror) #define SYSCALL_NONAME(name, nargs, cerror) SYSCALL_NONAME_8(name, cerror) #elif __SYSCALL_32BIT_ARG_BYTES == 36 #define SYSCALL(name, nargs, cerror) SYSCALL_8(name, cerror) #define SYSCALL_NONAME(name, nargs, cerror) SYSCALL_NONAME_8(name, cerror) #elif __SYSCALL_32BIT_ARG_BYTES == 40 #define SYSCALL(name, nargs, cerror) SYSCALL_8(name, cerror) #define SYSCALL_NONAME(name, nargs, cerror) SYSCALL_NONAME_8(name, cerror) #elif __SYSCALL_32BIT_ARG_BYTES == 44 #define SYSCALL(name, nargs, cerror) SYSCALL_8(name, cerror) #define SYSCALL_NONAME(name, nargs, cerror) SYSCALL_NONAME_8(name, cerror) #elif __SYSCALL_32BIT_ARG_BYTES == 48 #define SYSCALL(name, nargs, cerror) SYSCALL_12(name, cerror) #define SYSCALL_NONAME(name, nargs, cerror) SYSCALL_NONAME_12(name, cerror) #endif #endif #define SYSCALL_NONAME_0to4(name, cerror) \ DO_SYSCALL(SYS_##name) ;\ bcc 1f /* branch if carry bit is clear (no error) */ ; \ MI_BRANCH_EXTERNAL(_##cerror) /* call cerror */ ; \ 1: #define SYSCALL_NONAME_5(name, cerror) \ mov ip, sp /* save a pointer to the args */ ; \ stmfd sp!, { r4-r5 } /* save r4-r5 */ ;\ ldr r4, [ip] /* load 5th arg */ ; \ DO_SYSCALL(SYS_##name) ;\ ldmfd sp!, { r4-r5 } /* restore r4-r7 */ ; \ bcc 1f /* branch if carry bit is clear (no error) */ ; \ MI_BRANCH_EXTERNAL(_##cerror) /* call cerror */ ; \ 1: #define SYSCALL_NONAME_6to12(name, save_regs, arg_regs, cerror) \ mov ip, sp /* save a pointer to the args */ ; \ stmfd sp!, { save_regs } /* callee save regs */ ;\ ldmia ip, { arg_regs } /* load arguments */ ; \ DO_SYSCALL(SYS_##name) ;\ ldmfd sp!, { save_regs } /* restore callee saved regs */ ; \ bcc 1f /* branch if carry bit is clear (no error) */ ; \ MI_BRANCH_EXTERNAL(_##cerror) /* call cerror */ ; \ 1: #if __BIGGEST_ALIGNMENT__ > 4 /* For the armv7k ABI, the alignment requirements may add padding. So we * let the kernel figure it out and push extra on the stack to avoid un-needed * copy-ins. We are relying on arguments that aren't in registers starting * 32 bytes from sp. We also use r8 like in the mach case. */ #define SYSCALL_NONAME_0(name, cerror) SYSCALL_NONAME_0to4(name, cerror) #define SYSCALL_NONAME_1(name, cerror) SYSCALL_NONAME_0to4(name, cerror) #define SYSCALL_NONAME_2(name, cerror) SYSCALL_NONAME_0to4(name, cerror) #define SYSCALL_NONAME_3(name, cerror) SYSCALL_NONAME_0to4(name, cerror) #define SYSCALL_NONAME_4(name, cerror) SYSCALL_NONAME_6to12(name, r4-r5, r4-r5, cerror) #undef SYSCALL_NONAME_5 #define SYSCALL_NONAME_5(name, cerror) SYSCALL_NONAME_6to12(name, r4-r5, r4-r5, cerror) #define SYSCALL_NONAME_6(name, cerror) SYSCALL_NONAME_6to12(name, r4-r6 COMMA r8, r4-r6 COMMA r8, cerror) #define SYSCALL_NONAME_7(name, cerror) SYSCALL_NONAME_6to12(name, r4-r6 COMMA r8, r4-r6 COMMA r8, cerror) #define SYSCALL_NONAME_8(name, cerror) SYSCALL_NONAME_6to12(name, r4-r6 COMMA r8, r4-r6 COMMA r8, cerror) #define SYSCALL_NONAME_12(name, cerror) SYSCALL_NONAME_6to12(name, r4-r6 COMMA r8, r4-r6 COMMA r8, cerror) #else // !(__BIGGEST_ALIGNMENT__ > 4) (the normal arm32 ABI case) #define SYSCALL_NONAME_0(name, cerror) SYSCALL_NONAME_0to4(name, cerror) #define SYSCALL_NONAME_1(name, cerror) SYSCALL_NONAME_0to4(name, cerror) #define SYSCALL_NONAME_2(name, cerror) SYSCALL_NONAME_0to4(name, cerror) #define SYSCALL_NONAME_3(name, cerror) SYSCALL_NONAME_0to4(name, cerror) #define SYSCALL_NONAME_4(name, cerror) SYSCALL_NONAME_0to4(name, cerror) /* SYSCALL_NONAME_5 declared above */ #define SYSCALL_NONAME_6(name, cerror) SYSCALL_NONAME_6to12(name, r4-r5, r4-r5, cerror) #define SYSCALL_NONAME_7(name, cerror) SYSCALL_NONAME_6to12(name, r4-r6 COMMA r8, r4-r6, cerror) #define SYSCALL_NONAME_8(name, cerror) SYSCALL_NONAME_6to12(name, r4-r6 COMMA r8, r4-r6, cerror) #define SYSCALL_NONAME_12(name, cerror) SYSCALL_NONAME_6to12(name, r4-r6 COMMA r8, r4-r6, cerror) #endif // __BIGGEST_ALIGNMENT__ > 4 #define PSEUDO(pseudo, name, nargs, cerror) \ .globl pseudo ;\ .text ;\ .align 2 ;\ pseudo: ;\ SYSCALL_NONAME(name, nargs, cerror) #define __SYSCALL2(pseudo, name, nargs, cerror) \ PSEUDO(pseudo, name, nargs, cerror) ;\ bx lr #define __SYSCALL(pseudo, name, nargs) \ PSEUDO(pseudo, name, nargs, cerror) ;\ bx lr #elif defined(__arm64__) #include <mach/arm/syscall_sw.h> #include <mach/arm/vm_param.h> #include <mach/arm64/asm.h> #if defined(__arm64__) && !defined(__LP64__) #define ZERO_EXTEND(argnum) uxtw x ## argnum, w ## argnum #else #define ZERO_EXTEND(argnum) #endif #if defined(__arm64__) && !defined(__LP64__) #define SIGN_EXTEND(argnum) sxtw x ## argnum, w ## argnum #else #define SIGN_EXTEND(argnum) #endif /* * ARM64 system call interface: * * TBD */ #define DO_SYSCALL(num, cerror) \ mov x16, #(num) %%\ svc #SWI_SYSCALL %%\ b.cc 2f %%\ ARM64_STACK_PROLOG %%\ PUSH_FRAME %%\ bl _##cerror %%\ POP_FRAME %%\ ARM64_STACK_EPILOG %%\ 2: #define MI_GET_ADDRESS(reg,var) \ adrp reg, var@page %%\ add reg, reg, var@pageoff %% #define MI_CALL_EXTERNAL(sym) \ .globl sym %% \ bl sym #define SYSCALL_NONAME(name, nargs, cerror) \ DO_SYSCALL(SYS_##name, cerror) %% \ 1: #define MI_ENTRY_POINT(name) \ .text %% \ .align 2 %% \ .globl name %% \ name: #define PSEUDO(pseudo, name, nargs, cerror) \ .text %% \ .align 2 %% \ .globl pseudo %% \ pseudo: %% \ SYSCALL_NONAME(name, nargs, cerror) #define __SYSCALL(pseudo, name, nargs) \ PSEUDO(pseudo, name, nargs, cerror) %% \ ret #define __SYSCALL2(pseudo, name, nargs, cerror) \ PSEUDO(pseudo, name, nargs, cerror) %% \ ret #else #error Unsupported architecture #endif |