rsc.io/go@v0.0.0-20150416155037-e040fd465409/src/runtime/sys_openbsd_amd64.s (about) 1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 // 5 // System calls and other sys.stuff for AMD64, OpenBSD 6 // /usr/src/sys/kern/syscalls.master for syscall numbers. 7 // 8 9 #include "go_asm.h" 10 #include "go_tls.h" 11 #include "textflag.h" 12 13 #define CLOCK_MONOTONIC $3 14 15 // int32 tfork(void *param, uintptr psize, M *mp, G *gp, void (*fn)(void)); 16 TEXT runtime·tfork(SB),NOSPLIT,$32 17 18 // Copy mp, gp and fn off parent stack for use by child. 19 MOVQ mm+16(FP), R8 20 MOVQ gg+24(FP), R9 21 MOVQ fn+32(FP), R12 22 23 MOVQ param+0(FP), DI 24 MOVQ psize+8(FP), SI 25 MOVL $8, AX // sys___tfork 26 SYSCALL 27 28 // Return if tfork syscall failed. 29 JCC 4(PC) 30 NEGQ AX 31 MOVL AX, ret+40(FP) 32 RET 33 34 // In parent, return. 35 CMPL AX, $0 36 JEQ 3(PC) 37 MOVL AX, ret+40(FP) 38 RET 39 40 // Set FS to point at m->tls. 41 LEAQ m_tls(R8), DI 42 CALL runtime·settls(SB) 43 44 // In child, set up new stack. 45 get_tls(CX) 46 MOVQ R8, g_m(R9) 47 MOVQ R9, g(CX) 48 CALL runtime·stackcheck(SB) 49 50 // Call fn 51 CALL R12 52 53 // It shouldn't return. If it does, exit 54 MOVQ $0, DI // arg 1 - notdead 55 MOVL $302, AX // sys___threxit 56 SYSCALL 57 JMP -3(PC) // keep exiting 58 59 TEXT runtime·osyield(SB),NOSPLIT,$0 60 MOVL $298, AX // sys_sched_yield 61 SYSCALL 62 RET 63 64 TEXT runtime·thrsleep(SB),NOSPLIT,$0 65 MOVQ ident+0(FP), DI // arg 1 - ident 66 MOVL clock_id+8(FP), SI // arg 2 - clock_id 67 MOVQ tsp+16(FP), DX // arg 3 - tp 68 MOVQ lock+24(FP), R10 // arg 4 - lock 69 MOVQ abort+32(FP), R8 // arg 5 - abort 70 MOVL $94, AX // sys___thrsleep 71 SYSCALL 72 MOVL AX, ret+40(FP) 73 RET 74 75 TEXT runtime·thrwakeup(SB),NOSPLIT,$0 76 MOVQ ident+0(FP), DI // arg 1 - ident 77 MOVL n+8(FP), SI // arg 2 - n 78 MOVL $301, AX // sys___thrwakeup 79 SYSCALL 80 MOVL AX, ret+16(FP) 81 RET 82 83 // Exit the entire program (like C exit) 84 TEXT runtime·exit(SB),NOSPLIT,$-8 85 MOVL code+0(FP), DI // arg 1 - exit status 86 MOVL $1, AX // sys_exit 87 SYSCALL 88 MOVL $0xf1, 0xf1 // crash 89 RET 90 91 TEXT runtime·exit1(SB),NOSPLIT,$-8 92 MOVQ $0, DI // arg 1 - notdead 93 MOVL $302, AX // sys___threxit 94 SYSCALL 95 MOVL $0xf1, 0xf1 // crash 96 RET 97 98 TEXT runtime·open(SB),NOSPLIT,$-8 99 MOVQ name+0(FP), DI // arg 1 pathname 100 MOVL mode+8(FP), SI // arg 2 flags 101 MOVL perm+12(FP), DX // arg 3 mode 102 MOVL $5, AX 103 SYSCALL 104 JCC 2(PC) 105 MOVL $-1, AX 106 MOVL AX, ret+16(FP) 107 RET 108 109 TEXT runtime·closefd(SB),NOSPLIT,$-8 110 MOVL fd+0(FP), DI // arg 1 fd 111 MOVL $6, AX 112 SYSCALL 113 JCC 2(PC) 114 MOVL $-1, AX 115 MOVL AX, ret+8(FP) 116 RET 117 118 TEXT runtime·read(SB),NOSPLIT,$-8 119 MOVL fd+0(FP), DI // arg 1 fd 120 MOVQ p+8(FP), SI // arg 2 buf 121 MOVL n+16(FP), DX // arg 3 count 122 MOVL $3, AX 123 SYSCALL 124 JCC 2(PC) 125 MOVL $-1, AX 126 MOVL AX, ret+24(FP) 127 RET 128 129 TEXT runtime·write(SB),NOSPLIT,$-8 130 MOVQ fd+0(FP), DI // arg 1 - fd 131 MOVQ p+8(FP), SI // arg 2 - buf 132 MOVL n+16(FP), DX // arg 3 - nbyte 133 MOVL $4, AX // sys_write 134 SYSCALL 135 JCC 2(PC) 136 MOVL $-1, AX 137 MOVL AX, ret+24(FP) 138 RET 139 140 TEXT runtime·usleep(SB),NOSPLIT,$16 141 MOVL $0, DX 142 MOVL usec+0(FP), AX 143 MOVL $1000000, CX 144 DIVL CX 145 MOVQ AX, 0(SP) // tv_sec 146 MOVL $1000, AX 147 MULL DX 148 MOVQ AX, 8(SP) // tv_nsec 149 150 MOVQ SP, DI // arg 1 - rqtp 151 MOVQ $0, SI // arg 2 - rmtp 152 MOVL $91, AX // sys_nanosleep 153 SYSCALL 154 RET 155 156 TEXT runtime·raise(SB),NOSPLIT,$16 157 MOVL $299, AX // sys_getthrid 158 SYSCALL 159 MOVQ AX, DI // arg 1 - pid 160 MOVL sig+0(FP), SI // arg 2 - signum 161 MOVL $37, AX // sys_kill 162 SYSCALL 163 RET 164 165 TEXT runtime·setitimer(SB),NOSPLIT,$-8 166 MOVL mode+0(FP), DI // arg 1 - which 167 MOVQ new+8(FP), SI // arg 2 - itv 168 MOVQ old+16(FP), DX // arg 3 - oitv 169 MOVL $69, AX // sys_setitimer 170 SYSCALL 171 RET 172 173 // func now() (sec int64, nsec int32) 174 TEXT time·now(SB), NOSPLIT, $32 175 MOVQ $0, DI // arg 1 - clock_id 176 LEAQ 8(SP), SI // arg 2 - tp 177 MOVL $87, AX // sys_clock_gettime 178 SYSCALL 179 MOVQ 8(SP), AX // sec 180 MOVQ 16(SP), DX // nsec 181 182 // sec is in AX, nsec in DX 183 MOVQ AX, sec+0(FP) 184 MOVL DX, nsec+8(FP) 185 RET 186 187 TEXT runtime·nanotime(SB),NOSPLIT,$24 188 MOVQ CLOCK_MONOTONIC, DI // arg 1 - clock_id 189 LEAQ 8(SP), SI // arg 2 - tp 190 MOVL $87, AX // sys_clock_gettime 191 SYSCALL 192 MOVQ 8(SP), AX // sec 193 MOVQ 16(SP), DX // nsec 194 195 // sec is in AX, nsec in DX 196 // return nsec in AX 197 IMULQ $1000000000, AX 198 ADDQ DX, AX 199 MOVQ AX, ret+0(FP) 200 RET 201 202 TEXT runtime·sigaction(SB),NOSPLIT,$-8 203 MOVL sig+0(FP), DI // arg 1 - signum 204 MOVQ new+8(FP), SI // arg 2 - nsa 205 MOVQ old+16(FP), DX // arg 3 - osa 206 MOVL $46, AX 207 SYSCALL 208 JCC 2(PC) 209 MOVL $0xf1, 0xf1 // crash 210 RET 211 212 TEXT runtime·sigprocmask(SB),NOSPLIT,$0 213 MOVL mode+0(FP), DI // arg 1 - how 214 MOVL new+4(FP), SI // arg 2 - set 215 MOVL $48, AX // sys_sigprocmask 216 SYSCALL 217 JCC 2(PC) 218 MOVL $0xf1, 0xf1 // crash 219 MOVL AX, ret+8(FP) 220 RET 221 222 TEXT runtime·sigtramp(SB),NOSPLIT,$64 223 get_tls(BX) 224 225 // check that g exists 226 MOVQ g(BX), R10 227 CMPQ R10, $0 228 JNE 5(PC) 229 MOVQ DI, 0(SP) 230 MOVQ $runtime·badsignal(SB), AX 231 CALL AX 232 RET 233 234 // save g 235 MOVQ R10, 40(SP) 236 237 // g = m->signal 238 MOVQ g_m(R10), AX 239 MOVQ m_gsignal(AX), AX 240 MOVQ AX, g(BX) 241 242 MOVQ DI, 0(SP) 243 MOVQ SI, 8(SP) 244 MOVQ DX, 16(SP) 245 MOVQ R10, 24(SP) 246 247 CALL runtime·sighandler(SB) 248 249 // restore g 250 get_tls(BX) 251 MOVQ 40(SP), R10 252 MOVQ R10, g(BX) 253 RET 254 255 TEXT runtime·mmap(SB),NOSPLIT,$0 256 MOVQ addr+0(FP), DI // arg 1 - addr 257 MOVQ n+8(FP), SI // arg 2 - len 258 MOVL prot+16(FP), DX // arg 3 - prot 259 MOVL flags+20(FP), R10 // arg 4 - flags 260 MOVL fd+24(FP), R8 // arg 5 - fd 261 MOVL off+28(FP), R9 262 SUBQ $16, SP 263 MOVQ R9, 8(SP) // arg 7 - offset (passed on stack) 264 MOVQ $0, R9 // arg 6 - pad 265 MOVL $197, AX 266 SYSCALL 267 ADDQ $16, SP 268 MOVQ AX, ret+32(FP) 269 RET 270 271 TEXT runtime·munmap(SB),NOSPLIT,$0 272 MOVQ addr+0(FP), DI // arg 1 - addr 273 MOVQ n+8(FP), SI // arg 2 - len 274 MOVL $73, AX // sys_munmap 275 SYSCALL 276 JCC 2(PC) 277 MOVL $0xf1, 0xf1 // crash 278 RET 279 280 TEXT runtime·madvise(SB),NOSPLIT,$0 281 MOVQ addr+0(FP), DI // arg 1 - addr 282 MOVQ n+8(FP), SI // arg 2 - len 283 MOVL flags+16(FP), DX // arg 3 - behav 284 MOVQ $75, AX // sys_madvise 285 SYSCALL 286 // ignore failure - maybe pages are locked 287 RET 288 289 TEXT runtime·sigaltstack(SB),NOSPLIT,$-8 290 MOVQ new+8(SP), DI // arg 1 - nss 291 MOVQ old+16(SP), SI // arg 2 - oss 292 MOVQ $288, AX // sys_sigaltstack 293 SYSCALL 294 JCC 2(PC) 295 MOVL $0xf1, 0xf1 // crash 296 RET 297 298 // set tls base to DI 299 TEXT runtime·settls(SB),NOSPLIT,$0 300 // adjust for ELF: wants to use -16(FS) and -8(FS) for g and m 301 ADDQ $8, DI 302 MOVQ $329, AX // sys___settcb 303 SYSCALL 304 JCC 2(PC) 305 MOVL $0xf1, 0xf1 // crash 306 RET 307 308 TEXT runtime·sysctl(SB),NOSPLIT,$0 309 MOVQ mib+0(FP), DI // arg 1 - name 310 MOVL miblen+8(FP), SI // arg 2 - namelen 311 MOVQ out+16(FP), DX // arg 3 - oldp 312 MOVQ size+24(FP), R10 // arg 4 - oldlenp 313 MOVQ dst+32(FP), R8 // arg 5 - newp 314 MOVQ ndst+40(FP), R9 // arg 6 - newlen 315 MOVQ $202, AX // sys___sysctl 316 SYSCALL 317 JCC 4(PC) 318 NEGQ AX 319 MOVL AX, ret+48(FP) 320 RET 321 MOVL $0, AX 322 MOVL AX, ret+48(FP) 323 RET 324 325 // int32 runtime·kqueue(void); 326 TEXT runtime·kqueue(SB),NOSPLIT,$0 327 MOVQ $0, DI 328 MOVQ $0, SI 329 MOVQ $0, DX 330 MOVL $269, AX 331 SYSCALL 332 JCC 2(PC) 333 NEGQ AX 334 MOVL AX, ret+0(FP) 335 RET 336 337 // int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout); 338 TEXT runtime·kevent(SB),NOSPLIT,$0 339 MOVL fd+0(FP), DI 340 MOVQ ev1+8(FP), SI 341 MOVL nev1+16(FP), DX 342 MOVQ ev2+24(FP), R10 343 MOVL nev2+32(FP), R8 344 MOVQ ts+40(FP), R9 345 MOVL $72, AX 346 SYSCALL 347 JCC 2(PC) 348 NEGQ AX 349 MOVL AX, ret+48(FP) 350 RET 351 352 // void runtime·closeonexec(int32 fd); 353 TEXT runtime·closeonexec(SB),NOSPLIT,$0 354 MOVL fd+0(FP), DI // fd 355 MOVQ $2, SI // F_SETFD 356 MOVQ $1, DX // FD_CLOEXEC 357 MOVL $92, AX // fcntl 358 SYSCALL 359 RET