Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 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 | // |
| 6 | // System calls and other sys.stuff for arm, Linux |
| 7 | // |
| 8 | |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 9 | #include "go_asm.h" |
| 10 | #include "go_tls.h" |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 11 | #include "textflag.h" |
| 12 | |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 13 | #define CLOCK_REALTIME 0 |
| 14 | #define CLOCK_MONOTONIC 1 |
| 15 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 16 | // for EABI, as we don't support OABI |
| 17 | #define SYS_BASE 0x0 |
| 18 | |
| 19 | #define SYS_exit (SYS_BASE + 1) |
| 20 | #define SYS_read (SYS_BASE + 3) |
| 21 | #define SYS_write (SYS_BASE + 4) |
| 22 | #define SYS_open (SYS_BASE + 5) |
| 23 | #define SYS_close (SYS_BASE + 6) |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 24 | #define SYS_getpid (SYS_BASE + 20) |
| 25 | #define SYS_kill (SYS_BASE + 37) |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 26 | #define SYS_pipe (SYS_BASE + 42) |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 27 | #define SYS_clone (SYS_BASE + 120) |
| 28 | #define SYS_rt_sigreturn (SYS_BASE + 173) |
| 29 | #define SYS_rt_sigaction (SYS_BASE + 174) |
| 30 | #define SYS_rt_sigprocmask (SYS_BASE + 175) |
| 31 | #define SYS_sigaltstack (SYS_BASE + 186) |
| 32 | #define SYS_mmap2 (SYS_BASE + 192) |
| 33 | #define SYS_futex (SYS_BASE + 240) |
| 34 | #define SYS_exit_group (SYS_BASE + 248) |
| 35 | #define SYS_munmap (SYS_BASE + 91) |
| 36 | #define SYS_madvise (SYS_BASE + 220) |
| 37 | #define SYS_setitimer (SYS_BASE + 104) |
| 38 | #define SYS_mincore (SYS_BASE + 219) |
| 39 | #define SYS_gettid (SYS_BASE + 224) |
Colin Cross | d9c6b80 | 2019-03-19 21:10:31 -0700 | [diff] [blame] | 40 | #define SYS_tgkill (SYS_BASE + 268) |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 41 | #define SYS_sched_yield (SYS_BASE + 158) |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 42 | #define SYS_nanosleep (SYS_BASE + 162) |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 43 | #define SYS_sched_getaffinity (SYS_BASE + 242) |
| 44 | #define SYS_clock_gettime (SYS_BASE + 263) |
| 45 | #define SYS_epoll_create (SYS_BASE + 250) |
| 46 | #define SYS_epoll_ctl (SYS_BASE + 251) |
| 47 | #define SYS_epoll_wait (SYS_BASE + 252) |
Dan Willemsen | bc60c3c | 2021-12-15 01:09:00 -0800 | [diff] [blame] | 48 | #define SYS_timer_create (SYS_BASE + 257) |
| 49 | #define SYS_timer_settime (SYS_BASE + 258) |
| 50 | #define SYS_timer_delete (SYS_BASE + 261) |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 51 | #define SYS_epoll_create1 (SYS_BASE + 357) |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 52 | #define SYS_pipe2 (SYS_BASE + 359) |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 53 | #define SYS_fcntl (SYS_BASE + 55) |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 54 | #define SYS_access (SYS_BASE + 33) |
| 55 | #define SYS_connect (SYS_BASE + 283) |
| 56 | #define SYS_socket (SYS_BASE + 281) |
Dan Willemsen | d279748 | 2017-07-26 13:13:13 -0700 | [diff] [blame] | 57 | #define SYS_brk (SYS_BASE + 45) |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 58 | |
| 59 | #define ARM_BASE (SYS_BASE + 0x0f0000) |
| 60 | |
| 61 | TEXT runtime·open(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 62 | MOVW name+0(FP), R0 |
| 63 | MOVW mode+4(FP), R1 |
| 64 | MOVW perm+8(FP), R2 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 65 | MOVW $SYS_open, R7 |
| 66 | SWI $0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 67 | MOVW $0xfffff001, R1 |
| 68 | CMP R1, R0 |
| 69 | MOVW.HI $-1, R0 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 70 | MOVW R0, ret+12(FP) |
| 71 | RET |
| 72 | |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 73 | TEXT runtime·closefd(SB),NOSPLIT,$0 |
| 74 | MOVW fd+0(FP), R0 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 75 | MOVW $SYS_close, R7 |
| 76 | SWI $0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 77 | MOVW $0xfffff001, R1 |
| 78 | CMP R1, R0 |
| 79 | MOVW.HI $-1, R0 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 80 | MOVW R0, ret+4(FP) |
| 81 | RET |
| 82 | |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 83 | TEXT runtime·write1(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 84 | MOVW fd+0(FP), R0 |
| 85 | MOVW p+4(FP), R1 |
| 86 | MOVW n+8(FP), R2 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 87 | MOVW $SYS_write, R7 |
| 88 | SWI $0 |
| 89 | MOVW R0, ret+12(FP) |
| 90 | RET |
| 91 | |
| 92 | TEXT runtime·read(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 93 | MOVW fd+0(FP), R0 |
| 94 | MOVW p+4(FP), R1 |
| 95 | MOVW n+8(FP), R2 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 96 | MOVW $SYS_read, R7 |
| 97 | SWI $0 |
| 98 | MOVW R0, ret+12(FP) |
| 99 | RET |
| 100 | |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 101 | // func pipe() (r, w int32, errno int32) |
| 102 | TEXT runtime·pipe(SB),NOSPLIT,$0-12 |
| 103 | MOVW $r+0(FP), R0 |
| 104 | MOVW $SYS_pipe, R7 |
| 105 | SWI $0 |
| 106 | MOVW R0, errno+8(FP) |
| 107 | RET |
| 108 | |
| 109 | // func pipe2(flags int32) (r, w int32, errno int32) |
| 110 | TEXT runtime·pipe2(SB),NOSPLIT,$0-16 |
| 111 | MOVW $r+4(FP), R0 |
| 112 | MOVW flags+0(FP), R1 |
| 113 | MOVW $SYS_pipe2, R7 |
| 114 | SWI $0 |
| 115 | MOVW R0, errno+12(FP) |
| 116 | RET |
| 117 | |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 118 | TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 119 | MOVW code+0(FP), R0 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 120 | MOVW $SYS_exit_group, R7 |
| 121 | SWI $0 |
| 122 | MOVW $1234, R0 |
| 123 | MOVW $1002, R1 |
| 124 | MOVW R0, (R1) // fail hard |
| 125 | |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 126 | TEXT exit1<>(SB),NOSPLIT|NOFRAME,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 127 | MOVW code+0(FP), R0 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 128 | MOVW $SYS_exit, R7 |
| 129 | SWI $0 |
| 130 | MOVW $1234, R0 |
| 131 | MOVW $1003, R1 |
| 132 | MOVW R0, (R1) // fail hard |
| 133 | |
Dan Willemsen | a322328 | 2018-02-27 19:41:43 -0800 | [diff] [blame] | 134 | // func exitThread(wait *uint32) |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 135 | TEXT runtime·exitThread(SB),NOSPLIT|NOFRAME,$0-4 |
Dan Willemsen | a322328 | 2018-02-27 19:41:43 -0800 | [diff] [blame] | 136 | MOVW wait+0(FP), R0 |
| 137 | // We're done using the stack. |
| 138 | // Alas, there's no reliable way to make this write atomic |
| 139 | // without potentially using the stack. So it goes. |
| 140 | MOVW $0, R1 |
| 141 | MOVW R1, (R0) |
| 142 | MOVW $0, R0 // exit code |
| 143 | MOVW $SYS_exit, R7 |
| 144 | SWI $0 |
| 145 | MOVW $1234, R0 |
| 146 | MOVW $1004, R1 |
| 147 | MOVW R0, (R1) // fail hard |
| 148 | JMP 0(PC) |
| 149 | |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 150 | TEXT runtime·gettid(SB),NOSPLIT,$0-4 |
| 151 | MOVW $SYS_gettid, R7 |
| 152 | SWI $0 |
| 153 | MOVW R0, ret+0(FP) |
| 154 | RET |
| 155 | |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 156 | TEXT runtime·raise(SB),NOSPLIT|NOFRAME,$0 |
Colin Cross | d9c6b80 | 2019-03-19 21:10:31 -0700 | [diff] [blame] | 157 | MOVW $SYS_getpid, R7 |
| 158 | SWI $0 |
| 159 | MOVW R0, R4 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 160 | MOVW $SYS_gettid, R7 |
| 161 | SWI $0 |
Colin Cross | d9c6b80 | 2019-03-19 21:10:31 -0700 | [diff] [blame] | 162 | MOVW R0, R1 // arg 2 tid |
| 163 | MOVW R4, R0 // arg 1 pid |
| 164 | MOVW sig+0(FP), R2 // arg 3 |
| 165 | MOVW $SYS_tgkill, R7 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 166 | SWI $0 |
| 167 | RET |
| 168 | |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 169 | TEXT runtime·raiseproc(SB),NOSPLIT|NOFRAME,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 170 | MOVW $SYS_getpid, R7 |
| 171 | SWI $0 |
| 172 | // arg 1 tid already in R0 from getpid |
| 173 | MOVW sig+0(FP), R1 // arg 2 - signal |
| 174 | MOVW $SYS_kill, R7 |
| 175 | SWI $0 |
| 176 | RET |
| 177 | |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 178 | TEXT ·getpid(SB),NOSPLIT,$0-4 |
| 179 | MOVW $SYS_getpid, R7 |
| 180 | SWI $0 |
| 181 | MOVW R0, ret+0(FP) |
| 182 | RET |
| 183 | |
| 184 | TEXT ·tgkill(SB),NOSPLIT,$0-12 |
| 185 | MOVW tgid+0(FP), R0 |
| 186 | MOVW tid+4(FP), R1 |
| 187 | MOVW sig+8(FP), R2 |
| 188 | MOVW $SYS_tgkill, R7 |
| 189 | SWI $0 |
| 190 | RET |
| 191 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 192 | TEXT runtime·mmap(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 193 | MOVW addr+0(FP), R0 |
| 194 | MOVW n+4(FP), R1 |
| 195 | MOVW prot+8(FP), R2 |
| 196 | MOVW flags+12(FP), R3 |
| 197 | MOVW fd+16(FP), R4 |
| 198 | MOVW off+20(FP), R5 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 199 | MOVW $SYS_mmap2, R7 |
| 200 | SWI $0 |
| 201 | MOVW $0xfffff001, R6 |
| 202 | CMP R6, R0 |
Dan Willemsen | a322328 | 2018-02-27 19:41:43 -0800 | [diff] [blame] | 203 | MOVW $0, R1 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 204 | RSB.HI $0, R0 |
Dan Willemsen | a322328 | 2018-02-27 19:41:43 -0800 | [diff] [blame] | 205 | MOVW.HI R0, R1 // if error, put in R1 |
| 206 | MOVW.HI $0, R0 |
| 207 | MOVW R0, p+24(FP) |
| 208 | MOVW R1, err+28(FP) |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 209 | RET |
| 210 | |
| 211 | TEXT runtime·munmap(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 212 | MOVW addr+0(FP), R0 |
| 213 | MOVW n+4(FP), R1 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 214 | MOVW $SYS_munmap, R7 |
| 215 | SWI $0 |
| 216 | MOVW $0xfffff001, R6 |
| 217 | CMP R6, R0 |
| 218 | MOVW.HI $0, R8 // crash on syscall failure |
| 219 | MOVW.HI R8, (R8) |
| 220 | RET |
| 221 | |
| 222 | TEXT runtime·madvise(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 223 | MOVW addr+0(FP), R0 |
| 224 | MOVW n+4(FP), R1 |
| 225 | MOVW flags+8(FP), R2 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 226 | MOVW $SYS_madvise, R7 |
| 227 | SWI $0 |
Colin Cross | d9c6b80 | 2019-03-19 21:10:31 -0700 | [diff] [blame] | 228 | MOVW R0, ret+12(FP) |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 229 | RET |
| 230 | |
| 231 | TEXT runtime·setitimer(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 232 | MOVW mode+0(FP), R0 |
| 233 | MOVW new+4(FP), R1 |
| 234 | MOVW old+8(FP), R2 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 235 | MOVW $SYS_setitimer, R7 |
| 236 | SWI $0 |
| 237 | RET |
| 238 | |
Dan Willemsen | bc60c3c | 2021-12-15 01:09:00 -0800 | [diff] [blame] | 239 | TEXT runtime·timer_create(SB),NOSPLIT,$0-16 |
| 240 | MOVW clockid+0(FP), R0 |
| 241 | MOVW sevp+4(FP), R1 |
| 242 | MOVW timerid+8(FP), R2 |
| 243 | MOVW $SYS_timer_create, R7 |
| 244 | SWI $0 |
| 245 | MOVW R0, ret+12(FP) |
| 246 | RET |
| 247 | |
| 248 | TEXT runtime·timer_settime(SB),NOSPLIT,$0-20 |
| 249 | MOVW timerid+0(FP), R0 |
| 250 | MOVW flags+4(FP), R1 |
| 251 | MOVW new+8(FP), R2 |
| 252 | MOVW old+12(FP), R3 |
| 253 | MOVW $SYS_timer_settime, R7 |
| 254 | SWI $0 |
| 255 | MOVW R0, ret+16(FP) |
| 256 | RET |
| 257 | |
| 258 | TEXT runtime·timer_delete(SB),NOSPLIT,$0-8 |
| 259 | MOVW timerid+0(FP), R0 |
| 260 | MOVW $SYS_timer_delete, R7 |
| 261 | SWI $0 |
| 262 | MOVW R0, ret+4(FP) |
| 263 | RET |
| 264 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 265 | TEXT runtime·mincore(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 266 | MOVW addr+0(FP), R0 |
| 267 | MOVW n+4(FP), R1 |
| 268 | MOVW dst+8(FP), R2 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 269 | MOVW $SYS_mincore, R7 |
| 270 | SWI $0 |
| 271 | MOVW R0, ret+12(FP) |
| 272 | RET |
| 273 | |
Dan Willemsen | cc753b7 | 2021-08-31 13:25:42 -0700 | [diff] [blame] | 274 | TEXT runtime·walltime(SB),NOSPLIT,$8-12 |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 275 | // We don't know how much stack space the VDSO code will need, |
| 276 | // so switch to g0. |
| 277 | |
| 278 | // Save old SP. Use R13 instead of SP to avoid linker rewriting the offsets. |
| 279 | MOVW R13, R4 // R4 is unchanged by C code. |
| 280 | |
| 281 | MOVW g_m(g), R5 // R5 is unchanged by C code. |
| 282 | |
| 283 | // Set vdsoPC and vdsoSP for SIGPROF traceback. |
Patrice Arruda | 7e58022 | 2020-08-12 13:34:23 -0700 | [diff] [blame] | 284 | // Save the old values on stack and restore them on exit, |
| 285 | // so this function is reentrant. |
| 286 | MOVW m_vdsoPC(R5), R1 |
| 287 | MOVW m_vdsoSP(R5), R2 |
| 288 | MOVW R1, 4(R13) |
| 289 | MOVW R2, 8(R13) |
| 290 | |
Dan Willemsen | bc60c3c | 2021-12-15 01:09:00 -0800 | [diff] [blame] | 291 | MOVW $ret-4(FP), R2 // caller's SP |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 292 | MOVW LR, m_vdsoPC(R5) |
Dan Willemsen | bc60c3c | 2021-12-15 01:09:00 -0800 | [diff] [blame] | 293 | MOVW R2, m_vdsoSP(R5) |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 294 | |
| 295 | MOVW m_curg(R5), R0 |
| 296 | |
| 297 | CMP g, R0 // Only switch if on curg. |
| 298 | B.NE noswitch |
| 299 | |
| 300 | MOVW m_g0(R5), R0 |
| 301 | MOVW (g_sched+gobuf_sp)(R0), R13 // Set SP to g0 stack |
| 302 | |
| 303 | noswitch: |
| 304 | SUB $24, R13 // Space for results |
| 305 | BIC $0x7, R13 // Align for C code |
| 306 | |
| 307 | MOVW $CLOCK_REALTIME, R0 |
| 308 | MOVW $8(R13), R1 // timespec |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 309 | MOVW runtime·vdsoClockgettimeSym(SB), R2 |
| 310 | CMP $0, R2 |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 311 | B.EQ fallback |
| 312 | |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 313 | // Store g on gsignal's stack, so if we receive a signal |
| 314 | // during VDSO code we can find the g. |
| 315 | // If we don't have a signal stack, we won't receive signal, |
| 316 | // so don't bother saving g. |
| 317 | // When using cgo, we already saved g on TLS, also don't save |
| 318 | // g here. |
| 319 | // Also don't save g if we are already on the signal stack. |
| 320 | // We won't get a nested signal. |
| 321 | MOVB runtime·iscgo(SB), R6 |
| 322 | CMP $0, R6 |
| 323 | BNE nosaveg |
| 324 | MOVW m_gsignal(R5), R6 // g.m.gsignal |
| 325 | CMP $0, R6 |
| 326 | BEQ nosaveg |
| 327 | CMP g, R6 |
| 328 | BEQ nosaveg |
| 329 | MOVW (g_stack+stack_lo)(R6), R6 // g.m.gsignal.stack.lo |
| 330 | MOVW g, (R6) |
| 331 | |
| 332 | BL (R2) |
| 333 | |
| 334 | MOVW $0, R1 |
| 335 | MOVW R1, (R6) // clear g slot, R6 is unchanged by C code |
| 336 | |
| 337 | JMP finish |
| 338 | |
| 339 | nosaveg: |
| 340 | BL (R2) |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 341 | JMP finish |
| 342 | |
| 343 | fallback: |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 344 | MOVW $SYS_clock_gettime, R7 |
| 345 | SWI $0 |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 346 | |
| 347 | finish: |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 348 | MOVW 8(R13), R0 // sec |
| 349 | MOVW 12(R13), R2 // nsec |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 350 | |
| 351 | MOVW R4, R13 // Restore real SP |
Patrice Arruda | 7e58022 | 2020-08-12 13:34:23 -0700 | [diff] [blame] | 352 | // Restore vdsoPC, vdsoSP |
| 353 | // We don't worry about being signaled between the two stores. |
| 354 | // If we are not in a signal handler, we'll restore vdsoSP to 0, |
| 355 | // and no one will care about vdsoPC. If we are in a signal handler, |
| 356 | // we cannot receive another signal. |
| 357 | MOVW 8(R13), R1 |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 358 | MOVW R1, m_vdsoSP(R5) |
Patrice Arruda | 7e58022 | 2020-08-12 13:34:23 -0700 | [diff] [blame] | 359 | MOVW 4(R13), R1 |
| 360 | MOVW R1, m_vdsoPC(R5) |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 361 | |
| 362 | MOVW R0, sec_lo+0(FP) |
Dan Willemsen | bc60c3c | 2021-12-15 01:09:00 -0800 | [diff] [blame] | 363 | MOVW $0, R1 |
Dan Willemsen | d279748 | 2017-07-26 13:13:13 -0700 | [diff] [blame] | 364 | MOVW R1, sec_hi+4(FP) |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 365 | MOVW R2, nsec+8(FP) |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 366 | RET |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 367 | |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 368 | // int64 nanotime1(void) |
Patrice Arruda | 7e58022 | 2020-08-12 13:34:23 -0700 | [diff] [blame] | 369 | TEXT runtime·nanotime1(SB),NOSPLIT,$8-8 |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 370 | // Switch to g0 stack. See comment above in runtime·walltime. |
| 371 | |
| 372 | // Save old SP. Use R13 instead of SP to avoid linker rewriting the offsets. |
| 373 | MOVW R13, R4 // R4 is unchanged by C code. |
| 374 | |
| 375 | MOVW g_m(g), R5 // R5 is unchanged by C code. |
| 376 | |
| 377 | // Set vdsoPC and vdsoSP for SIGPROF traceback. |
Patrice Arruda | 7e58022 | 2020-08-12 13:34:23 -0700 | [diff] [blame] | 378 | // Save the old values on stack and restore them on exit, |
| 379 | // so this function is reentrant. |
| 380 | MOVW m_vdsoPC(R5), R1 |
| 381 | MOVW m_vdsoSP(R5), R2 |
| 382 | MOVW R1, 4(R13) |
| 383 | MOVW R2, 8(R13) |
| 384 | |
Dan Willemsen | bc60c3c | 2021-12-15 01:09:00 -0800 | [diff] [blame] | 385 | MOVW $ret-4(FP), R2 // caller's SP |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 386 | MOVW LR, m_vdsoPC(R5) |
Dan Willemsen | bc60c3c | 2021-12-15 01:09:00 -0800 | [diff] [blame] | 387 | MOVW R2, m_vdsoSP(R5) |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 388 | |
| 389 | MOVW m_curg(R5), R0 |
| 390 | |
| 391 | CMP g, R0 // Only switch if on curg. |
| 392 | B.NE noswitch |
| 393 | |
| 394 | MOVW m_g0(R5), R0 |
| 395 | MOVW (g_sched+gobuf_sp)(R0), R13 // Set SP to g0 stack |
| 396 | |
| 397 | noswitch: |
| 398 | SUB $24, R13 // Space for results |
| 399 | BIC $0x7, R13 // Align for C code |
| 400 | |
| 401 | MOVW $CLOCK_MONOTONIC, R0 |
| 402 | MOVW $8(R13), R1 // timespec |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 403 | MOVW runtime·vdsoClockgettimeSym(SB), R2 |
| 404 | CMP $0, R2 |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 405 | B.EQ fallback |
| 406 | |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 407 | // Store g on gsignal's stack, so if we receive a signal |
| 408 | // during VDSO code we can find the g. |
| 409 | // If we don't have a signal stack, we won't receive signal, |
| 410 | // so don't bother saving g. |
| 411 | // When using cgo, we already saved g on TLS, also don't save |
| 412 | // g here. |
| 413 | // Also don't save g if we are already on the signal stack. |
| 414 | // We won't get a nested signal. |
| 415 | MOVB runtime·iscgo(SB), R6 |
| 416 | CMP $0, R6 |
| 417 | BNE nosaveg |
| 418 | MOVW m_gsignal(R5), R6 // g.m.gsignal |
| 419 | CMP $0, R6 |
| 420 | BEQ nosaveg |
| 421 | CMP g, R6 |
| 422 | BEQ nosaveg |
| 423 | MOVW (g_stack+stack_lo)(R6), R6 // g.m.gsignal.stack.lo |
| 424 | MOVW g, (R6) |
| 425 | |
| 426 | BL (R2) |
| 427 | |
| 428 | MOVW $0, R1 |
| 429 | MOVW R1, (R6) // clear g slot, R6 is unchanged by C code |
| 430 | |
| 431 | JMP finish |
| 432 | |
| 433 | nosaveg: |
| 434 | BL (R2) |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 435 | JMP finish |
| 436 | |
| 437 | fallback: |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 438 | MOVW $SYS_clock_gettime, R7 |
| 439 | SWI $0 |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 440 | |
| 441 | finish: |
| 442 | MOVW 8(R13), R0 // sec |
| 443 | MOVW 12(R13), R2 // nsec |
| 444 | |
| 445 | MOVW R4, R13 // Restore real SP |
Patrice Arruda | 7e58022 | 2020-08-12 13:34:23 -0700 | [diff] [blame] | 446 | // Restore vdsoPC, vdsoSP |
| 447 | // We don't worry about being signaled between the two stores. |
| 448 | // If we are not in a signal handler, we'll restore vdsoSP to 0, |
| 449 | // and no one will care about vdsoPC. If we are in a signal handler, |
| 450 | // we cannot receive another signal. |
| 451 | MOVW 8(R13), R4 |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 452 | MOVW R4, m_vdsoSP(R5) |
Patrice Arruda | 7e58022 | 2020-08-12 13:34:23 -0700 | [diff] [blame] | 453 | MOVW 4(R13), R4 |
| 454 | MOVW R4, m_vdsoPC(R5) |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 455 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 456 | MOVW $1000000000, R3 |
| 457 | MULLU R0, R3, (R1, R0) |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 458 | ADD.S R2, R0 |
Dan Willemsen | bc60c3c | 2021-12-15 01:09:00 -0800 | [diff] [blame] | 459 | ADC $0, R1 // Add carry bit to upper half. |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 460 | |
| 461 | MOVW R0, ret_lo+0(FP) |
| 462 | MOVW R1, ret_hi+4(FP) |
| 463 | RET |
| 464 | |
| 465 | // int32 futex(int32 *uaddr, int32 op, int32 val, |
| 466 | // struct timespec *timeout, int32 *uaddr2, int32 val2); |
| 467 | TEXT runtime·futex(SB),NOSPLIT,$0 |
Dan Willemsen | ebae302 | 2017-01-13 23:01:08 -0800 | [diff] [blame] | 468 | MOVW addr+0(FP), R0 |
| 469 | MOVW op+4(FP), R1 |
| 470 | MOVW val+8(FP), R2 |
| 471 | MOVW ts+12(FP), R3 |
| 472 | MOVW addr2+16(FP), R4 |
| 473 | MOVW val3+20(FP), R5 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 474 | MOVW $SYS_futex, R7 |
| 475 | SWI $0 |
| 476 | MOVW R0, ret+24(FP) |
| 477 | RET |
| 478 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 479 | // int32 clone(int32 flags, void *stack, M *mp, G *gp, void (*fn)(void)); |
| 480 | TEXT runtime·clone(SB),NOSPLIT,$0 |
| 481 | MOVW flags+0(FP), R0 |
| 482 | MOVW stk+4(FP), R1 |
| 483 | MOVW $0, R2 // parent tid ptr |
| 484 | MOVW $0, R3 // tls_val |
| 485 | MOVW $0, R4 // child tid ptr |
| 486 | MOVW $0, R5 |
| 487 | |
| 488 | // Copy mp, gp, fn off parent stack for use by child. |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 489 | MOVW $-16(R1), R1 |
Dan Willemsen | ebae302 | 2017-01-13 23:01:08 -0800 | [diff] [blame] | 490 | MOVW mp+8(FP), R6 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 491 | MOVW R6, 0(R1) |
Dan Willemsen | ebae302 | 2017-01-13 23:01:08 -0800 | [diff] [blame] | 492 | MOVW gp+12(FP), R6 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 493 | MOVW R6, 4(R1) |
| 494 | MOVW fn+16(FP), R6 |
| 495 | MOVW R6, 8(R1) |
| 496 | MOVW $1234, R6 |
| 497 | MOVW R6, 12(R1) |
| 498 | |
| 499 | MOVW $SYS_clone, R7 |
| 500 | SWI $0 |
| 501 | |
| 502 | // In parent, return. |
| 503 | CMP $0, R0 |
| 504 | BEQ 3(PC) |
| 505 | MOVW R0, ret+20(FP) |
| 506 | RET |
| 507 | |
| 508 | // Paranoia: check that SP is as we expect. Use R13 to avoid linker 'fixup' |
Colin Cross | 430342c | 2019-09-07 08:36:04 -0700 | [diff] [blame] | 509 | NOP R13 // tell vet SP/R13 changed - stop checking offsets |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 510 | MOVW 12(R13), R0 |
| 511 | MOVW $1234, R1 |
| 512 | CMP R0, R1 |
| 513 | BEQ 2(PC) |
| 514 | BL runtime·abort(SB) |
| 515 | |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 516 | MOVW 0(R13), R8 // m |
| 517 | MOVW 4(R13), R0 // g |
| 518 | |
| 519 | CMP $0, R8 |
| 520 | BEQ nog |
| 521 | CMP $0, R0 |
| 522 | BEQ nog |
| 523 | |
| 524 | MOVW R0, g |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 525 | MOVW R8, g_m(g) |
| 526 | |
| 527 | // paranoia; check they are not nil |
| 528 | MOVW 0(R8), R0 |
| 529 | MOVW 0(g), R0 |
| 530 | |
| 531 | BL runtime·emptyfunc(SB) // fault if stack check is wrong |
| 532 | |
| 533 | // Initialize m->procid to Linux tid |
| 534 | MOVW $SYS_gettid, R7 |
| 535 | SWI $0 |
| 536 | MOVW g_m(g), R8 |
| 537 | MOVW R0, m_procid(R8) |
| 538 | |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 539 | nog: |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 540 | // Call fn |
| 541 | MOVW 8(R13), R0 |
| 542 | MOVW $16(R13), R13 |
| 543 | BL (R0) |
| 544 | |
Dan Willemsen | 38f2dba | 2016-07-08 14:54:35 -0700 | [diff] [blame] | 545 | // It shouldn't return. If it does, exit that thread. |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 546 | SUB $16, R13 // restore the stack pointer to avoid memory corruption |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 547 | MOVW $0, R0 |
| 548 | MOVW R0, 4(R13) |
Dan Willemsen | a322328 | 2018-02-27 19:41:43 -0800 | [diff] [blame] | 549 | BL exit1<>(SB) |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 550 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 551 | MOVW $1234, R0 |
| 552 | MOVW $1005, R1 |
| 553 | MOVW R0, (R1) |
| 554 | |
| 555 | TEXT runtime·sigaltstack(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 556 | MOVW new+0(FP), R0 |
| 557 | MOVW old+4(FP), R1 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 558 | MOVW $SYS_sigaltstack, R7 |
| 559 | SWI $0 |
| 560 | MOVW $0xfffff001, R6 |
| 561 | CMP R6, R0 |
| 562 | MOVW.HI $0, R8 // crash on syscall failure |
| 563 | MOVW.HI R8, (R8) |
| 564 | RET |
| 565 | |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 566 | TEXT runtime·sigfwd(SB),NOSPLIT,$0-16 |
| 567 | MOVW sig+4(FP), R0 |
| 568 | MOVW info+8(FP), R1 |
| 569 | MOVW ctx+12(FP), R2 |
| 570 | MOVW fn+0(FP), R11 |
Dan Willemsen | 38f2dba | 2016-07-08 14:54:35 -0700 | [diff] [blame] | 571 | MOVW R13, R4 |
| 572 | SUB $24, R13 |
| 573 | BIC $0x7, R13 // alignment for ELF ABI |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 574 | BL (R11) |
Dan Willemsen | 38f2dba | 2016-07-08 14:54:35 -0700 | [diff] [blame] | 575 | MOVW R4, R13 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 576 | RET |
| 577 | |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 578 | TEXT runtime·sigtramp(SB),NOSPLIT,$0 |
| 579 | // Reserve space for callee-save registers and arguments. |
| 580 | MOVM.DB.W [R4-R11], (R13) |
| 581 | SUB $16, R13 |
| 582 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 583 | // this might be called in external code context, |
| 584 | // where g is not set. |
| 585 | // first save R0, because runtime·load_g will clobber it |
| 586 | MOVW R0, 4(R13) |
| 587 | MOVB runtime·iscgo(SB), R0 |
| 588 | CMP $0, R0 |
| 589 | BL.NE runtime·load_g(SB) |
| 590 | |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 591 | MOVW R1, 8(R13) |
| 592 | MOVW R2, 12(R13) |
| 593 | MOVW $runtime·sigtrampgo(SB), R11 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 594 | BL (R11) |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 595 | |
| 596 | // Restore callee-save registers. |
| 597 | ADD $16, R13 |
| 598 | MOVM.IA.W (R13), [R4-R11] |
| 599 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 600 | RET |
| 601 | |
Dan Willemsen | 38f2dba | 2016-07-08 14:54:35 -0700 | [diff] [blame] | 602 | TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0 |
| 603 | MOVW $runtime·sigtramp(SB), R11 |
| 604 | B (R11) |
| 605 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 606 | TEXT runtime·rtsigprocmask(SB),NOSPLIT,$0 |
Dan Willemsen | ebae302 | 2017-01-13 23:01:08 -0800 | [diff] [blame] | 607 | MOVW how+0(FP), R0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 608 | MOVW new+4(FP), R1 |
| 609 | MOVW old+8(FP), R2 |
| 610 | MOVW size+12(FP), R3 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 611 | MOVW $SYS_rt_sigprocmask, R7 |
| 612 | SWI $0 |
| 613 | RET |
| 614 | |
| 615 | TEXT runtime·rt_sigaction(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 616 | MOVW sig+0(FP), R0 |
| 617 | MOVW new+4(FP), R1 |
| 618 | MOVW old+8(FP), R2 |
| 619 | MOVW size+12(FP), R3 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 620 | MOVW $SYS_rt_sigaction, R7 |
| 621 | SWI $0 |
| 622 | MOVW R0, ret+16(FP) |
| 623 | RET |
| 624 | |
| 625 | TEXT runtime·usleep(SB),NOSPLIT,$12 |
| 626 | MOVW usec+0(FP), R0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 627 | CALL runtime·usplitR0(SB) |
| 628 | MOVW R0, 4(R13) |
Dan Willemsen | d279748 | 2017-07-26 13:13:13 -0700 | [diff] [blame] | 629 | MOVW $1000, R0 // usec to nsec |
| 630 | MUL R0, R1 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 631 | MOVW R1, 8(R13) |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 632 | MOVW $4(R13), R0 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 633 | MOVW $0, R1 |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 634 | MOVW $SYS_nanosleep, R7 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 635 | SWI $0 |
| 636 | RET |
| 637 | |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 638 | // As for cas, memory barriers are complicated on ARM, but the kernel |
| 639 | // provides a user helper. ARMv5 does not support SMP and has no |
| 640 | // memory barrier instruction at all. ARMv6 added SMP support and has |
| 641 | // a memory barrier, but it requires writing to a coprocessor |
| 642 | // register. ARMv7 introduced the DMB instruction, but it's expensive |
| 643 | // even on single-core devices. The kernel helper takes care of all of |
| 644 | // this for us. |
| 645 | |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 646 | TEXT kernelPublicationBarrier<>(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 647 | // void __kuser_memory_barrier(void); |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 648 | MOVW $0xffff0fa0, R11 |
| 649 | CALL (R11) |
| 650 | RET |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 651 | |
| 652 | TEXT ·publicationBarrier(SB),NOSPLIT,$0 |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 653 | MOVB ·goarm(SB), R11 |
| 654 | CMP $7, R11 |
| 655 | BLT 2(PC) |
| 656 | JMP ·armPublicationBarrier(SB) |
| 657 | JMP kernelPublicationBarrier<>(SB) // extra layer so this function is leaf and no SP adjustment on GOARM=7 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 658 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 659 | TEXT runtime·osyield(SB),NOSPLIT,$0 |
| 660 | MOVW $SYS_sched_yield, R7 |
| 661 | SWI $0 |
| 662 | RET |
| 663 | |
| 664 | TEXT runtime·sched_getaffinity(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 665 | MOVW pid+0(FP), R0 |
| 666 | MOVW len+4(FP), R1 |
| 667 | MOVW buf+8(FP), R2 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 668 | MOVW $SYS_sched_getaffinity, R7 |
| 669 | SWI $0 |
| 670 | MOVW R0, ret+12(FP) |
| 671 | RET |
| 672 | |
| 673 | // int32 runtime·epollcreate(int32 size) |
| 674 | TEXT runtime·epollcreate(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 675 | MOVW size+0(FP), R0 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 676 | MOVW $SYS_epoll_create, R7 |
| 677 | SWI $0 |
| 678 | MOVW R0, ret+4(FP) |
| 679 | RET |
| 680 | |
| 681 | // int32 runtime·epollcreate1(int32 flags) |
| 682 | TEXT runtime·epollcreate1(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 683 | MOVW flags+0(FP), R0 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 684 | MOVW $SYS_epoll_create1, R7 |
| 685 | SWI $0 |
| 686 | MOVW R0, ret+4(FP) |
| 687 | RET |
| 688 | |
| 689 | // func epollctl(epfd, op, fd int32, ev *epollEvent) int |
| 690 | TEXT runtime·epollctl(SB),NOSPLIT,$0 |
| 691 | MOVW epfd+0(FP), R0 |
| 692 | MOVW op+4(FP), R1 |
| 693 | MOVW fd+8(FP), R2 |
| 694 | MOVW ev+12(FP), R3 |
| 695 | MOVW $SYS_epoll_ctl, R7 |
| 696 | SWI $0 |
| 697 | MOVW R0, ret+16(FP) |
| 698 | RET |
| 699 | |
| 700 | // int32 runtime·epollwait(int32 epfd, EpollEvent *ev, int32 nev, int32 timeout) |
| 701 | TEXT runtime·epollwait(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 702 | MOVW epfd+0(FP), R0 |
| 703 | MOVW ev+4(FP), R1 |
| 704 | MOVW nev+8(FP), R2 |
| 705 | MOVW timeout+12(FP), R3 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 706 | MOVW $SYS_epoll_wait, R7 |
| 707 | SWI $0 |
| 708 | MOVW R0, ret+16(FP) |
| 709 | RET |
| 710 | |
| 711 | // void runtime·closeonexec(int32 fd) |
| 712 | TEXT runtime·closeonexec(SB),NOSPLIT,$0 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 713 | MOVW fd+0(FP), R0 // fd |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 714 | MOVW $2, R1 // F_SETFD |
| 715 | MOVW $1, R2 // FD_CLOEXEC |
| 716 | MOVW $SYS_fcntl, R7 |
| 717 | SWI $0 |
| 718 | RET |
| 719 | |
Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 720 | // func runtime·setNonblock(fd int32) |
| 721 | TEXT runtime·setNonblock(SB),NOSPLIT,$0-4 |
| 722 | MOVW fd+0(FP), R0 // fd |
| 723 | MOVW $3, R1 // F_GETFL |
| 724 | MOVW $0, R2 |
| 725 | MOVW $SYS_fcntl, R7 |
| 726 | SWI $0 |
| 727 | ORR $0x800, R0, R2 // O_NONBLOCK |
| 728 | MOVW fd+0(FP), R0 // fd |
| 729 | MOVW $4, R1 // F_SETFL |
| 730 | MOVW $SYS_fcntl, R7 |
| 731 | SWI $0 |
| 732 | RET |
| 733 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 734 | // b __kuser_get_tls @ 0xffff0fe0 |
Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame] | 735 | TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0 |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 736 | MOVW $0xffff0fe0, R0 |
| 737 | B (R0) |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 738 | |
| 739 | TEXT runtime·access(SB),NOSPLIT,$0 |
| 740 | MOVW name+0(FP), R0 |
| 741 | MOVW mode+4(FP), R1 |
| 742 | MOVW $SYS_access, R7 |
| 743 | SWI $0 |
| 744 | MOVW R0, ret+8(FP) |
| 745 | RET |
| 746 | |
| 747 | TEXT runtime·connect(SB),NOSPLIT,$0 |
| 748 | MOVW fd+0(FP), R0 |
| 749 | MOVW addr+4(FP), R1 |
Dan Willemsen | ebae302 | 2017-01-13 23:01:08 -0800 | [diff] [blame] | 750 | MOVW len+8(FP), R2 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 751 | MOVW $SYS_connect, R7 |
| 752 | SWI $0 |
| 753 | MOVW R0, ret+12(FP) |
| 754 | RET |
| 755 | |
| 756 | TEXT runtime·socket(SB),NOSPLIT,$0 |
| 757 | MOVW domain+0(FP), R0 |
Dan Willemsen | ebae302 | 2017-01-13 23:01:08 -0800 | [diff] [blame] | 758 | MOVW typ+4(FP), R1 |
| 759 | MOVW prot+8(FP), R2 |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 760 | MOVW $SYS_socket, R7 |
| 761 | SWI $0 |
| 762 | MOVW R0, ret+12(FP) |
| 763 | RET |
Dan Willemsen | d279748 | 2017-07-26 13:13:13 -0700 | [diff] [blame] | 764 | |
| 765 | // func sbrk0() uintptr |
| 766 | TEXT runtime·sbrk0(SB),NOSPLIT,$0-4 |
| 767 | // Implemented as brk(NULL). |
| 768 | MOVW $0, R0 |
| 769 | MOVW $SYS_brk, R7 |
| 770 | SWI $0 |
| 771 | MOVW R0, ret+0(FP) |
| 772 | RET |
Colin Cross | 430342c | 2019-09-07 08:36:04 -0700 | [diff] [blame] | 773 | |
| 774 | TEXT runtime·sigreturn(SB),NOSPLIT,$0-0 |
| 775 | RET |