| // Copyright 2019 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // |
| // System calls and other sys.stuff for arm64, FreeBSD |
| // /usr/src/sys/kern/syscalls.master for syscall numbers. |
| // |
| |
| #include "go_asm.h" |
| #include "go_tls.h" |
| #include "textflag.h" |
| #include "cgo/abi_arm64.h" |
| |
| #define CLOCK_REALTIME 0 |
| #define CLOCK_MONOTONIC 4 |
| #define FD_CLOEXEC 1 |
| #define F_SETFD 2 |
| #define F_GETFL 3 |
| #define F_SETFL 4 |
| #define O_NONBLOCK 4 |
| |
| #define SYS_exit 1 |
| #define SYS_read 3 |
| #define SYS_write 4 |
| #define SYS_open 5 |
| #define SYS_close 6 |
| #define SYS_getpid 20 |
| #define SYS_kill 37 |
| #define SYS_sigaltstack 53 |
| #define SYS_munmap 73 |
| #define SYS_madvise 75 |
| #define SYS_setitimer 83 |
| #define SYS_fcntl 92 |
| #define SYS___sysctl 202 |
| #define SYS_nanosleep 240 |
| #define SYS_clock_gettime 232 |
| #define SYS_sched_yield 331 |
| #define SYS_sigprocmask 340 |
| #define SYS_kqueue 362 |
| #define SYS_kevent 363 |
| #define SYS_sigaction 416 |
| #define SYS_thr_exit 431 |
| #define SYS_thr_self 432 |
| #define SYS_thr_kill 433 |
| #define SYS__umtx_op 454 |
| #define SYS_thr_new 455 |
| #define SYS_mmap 477 |
| #define SYS_cpuset_getaffinity 487 |
| #define SYS_pipe2 542 |
| |
| TEXT emptyfunc<>(SB),0,$0-0 |
| RET |
| |
| // func sys_umtx_op(addr *uint32, mode int32, val uint32, uaddr1 uintptr, ut *umtx_time) int32 |
| TEXT runtime·sys_umtx_op(SB),NOSPLIT,$0 |
| MOVD addr+0(FP), R0 |
| MOVW mode+8(FP), R1 |
| MOVW val+12(FP), R2 |
| MOVD uaddr1+16(FP), R3 |
| MOVD ut+24(FP), R4 |
| MOVD $SYS__umtx_op, R8 |
| SVC |
| BCC ok |
| NEG R0, R0 |
| ok: |
| MOVW R0, ret+32(FP) |
| RET |
| |
| // func thr_new(param *thrparam, size int32) int32 |
| TEXT runtime·thr_new(SB),NOSPLIT,$0 |
| MOVD param+0(FP), R0 |
| MOVW size+8(FP), R1 |
| MOVD $SYS_thr_new, R8 |
| SVC |
| BCC ok |
| NEG R0, R0 |
| ok: |
| MOVW R0, ret+16(FP) |
| RET |
| |
| // func thr_start() |
| TEXT runtime·thr_start(SB),NOSPLIT,$0 |
| // set up g |
| MOVD m_g0(R0), g |
| MOVD R0, g_m(g) |
| BL emptyfunc<>(SB) // fault if stack check is wrong |
| BL runtime·mstart(SB) |
| |
| MOVD $2, R8 // crash (not reached) |
| MOVD R8, (R8) |
| RET |
| |
| // func exit(code int32) |
| TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0-4 |
| MOVW code+0(FP), R0 |
| MOVD $SYS_exit, R8 |
| SVC |
| MOVD $0, R0 |
| MOVD R0, (R0) |
| |
| // func exitThread(wait *uint32) |
| TEXT runtime·exitThread(SB),NOSPLIT|NOFRAME,$0-8 |
| MOVD wait+0(FP), R0 |
| // We're done using the stack. |
| MOVW $0, R1 |
| STLRW R1, (R0) |
| MOVW $0, R0 |
| MOVD $SYS_thr_exit, R8 |
| SVC |
| JMP 0(PC) |
| |
| // func open(name *byte, mode, perm int32) int32 |
| TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0-20 |
| MOVD name+0(FP), R0 |
| MOVW mode+8(FP), R1 |
| MOVW perm+12(FP), R2 |
| MOVD $SYS_open, R8 |
| SVC |
| BCC ok |
| MOVW $-1, R0 |
| ok: |
| MOVW R0, ret+16(FP) |
| RET |
| |
| // func closefd(fd int32) int32 |
| TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0-12 |
| MOVW fd+0(FP), R0 |
| MOVD $SYS_close, R8 |
| SVC |
| BCC ok |
| MOVW $-1, R0 |
| ok: |
| MOVW R0, ret+8(FP) |
| RET |
| |
| // func pipe2(flags int32) (r, w int32, errno int32) |
| TEXT runtime·pipe2(SB),NOSPLIT|NOFRAME,$0-20 |
| MOVD $r+8(FP), R0 |
| MOVW flags+0(FP), R1 |
| MOVD $SYS_pipe2, R8 |
| SVC |
| BCC ok |
| NEG R0, R0 |
| ok: |
| MOVW R0, errno+16(FP) |
| RET |
| |
| // func write1(fd uintptr, p unsafe.Pointer, n int32) int32 |
| TEXT runtime·write1(SB),NOSPLIT|NOFRAME,$0-28 |
| MOVD fd+0(FP), R0 |
| MOVD p+8(FP), R1 |
| MOVW n+16(FP), R2 |
| MOVD $SYS_write, R8 |
| SVC |
| BCC ok |
| NEG R0, R0 // caller expects negative errno |
| ok: |
| MOVW R0, ret+24(FP) |
| RET |
| |
| // func read(fd int32, p unsafe.Pointer, n int32) int32 |
| TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0-28 |
| MOVW fd+0(FP), R0 |
| MOVD p+8(FP), R1 |
| MOVW n+16(FP), R2 |
| MOVD $SYS_read, R8 |
| SVC |
| BCC ok |
| NEG R0, R0 // caller expects negative errno |
| ok: |
| MOVW R0, ret+24(FP) |
| RET |
| |
| // func usleep(usec uint32) |
| TEXT runtime·usleep(SB),NOSPLIT,$24-4 |
| MOVWU usec+0(FP), R3 |
| MOVD R3, R5 |
| MOVW $1000000, R4 |
| UDIV R4, R3 |
| MOVD R3, 8(RSP) |
| MUL R3, R4 |
| SUB R4, R5 |
| MOVW $1000, R4 |
| MUL R4, R5 |
| MOVD R5, 16(RSP) |
| |
| // nanosleep(&ts, 0) |
| ADD $8, RSP, R0 |
| MOVD $0, R1 |
| MOVD $SYS_nanosleep, R8 |
| SVC |
| RET |
| |
| // func thr_self() thread |
| TEXT runtime·thr_self(SB),NOSPLIT,$8-8 |
| MOVD $ptr-8(SP), R0 // arg 1 &8(SP) |
| MOVD $SYS_thr_self, R8 |
| SVC |
| MOVD ptr-8(SP), R0 |
| MOVD R0, ret+0(FP) |
| RET |
| |
| // func thr_kill(t thread, sig int) |
| TEXT runtime·thr_kill(SB),NOSPLIT,$0-16 |
| MOVD tid+0(FP), R0 // arg 1 pid |
| MOVD sig+8(FP), R1 // arg 2 sig |
| MOVD $SYS_thr_kill, R8 |
| SVC |
| RET |
| |
| // func raiseproc(sig uint32) |
| TEXT runtime·raiseproc(SB),NOSPLIT|NOFRAME,$0 |
| MOVD $SYS_getpid, R8 |
| SVC |
| MOVW sig+0(FP), R1 |
| MOVD $SYS_kill, R8 |
| SVC |
| RET |
| |
| // func setitimer(mode int32, new, old *itimerval) |
| TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0-24 |
| MOVW mode+0(FP), R0 |
| MOVD new+8(FP), R1 |
| MOVD old+16(FP), R2 |
| MOVD $SYS_setitimer, R8 |
| SVC |
| RET |
| |
| // func fallback_walltime() (sec int64, nsec int32) |
| TEXT runtime·fallback_walltime(SB),NOSPLIT,$24-12 |
| MOVW $CLOCK_REALTIME, R0 |
| MOVD $8(RSP), R1 |
| MOVD $SYS_clock_gettime, R8 |
| SVC |
| MOVD 8(RSP), R0 // sec |
| MOVW 16(RSP), R1 // nsec |
| MOVD R0, sec+0(FP) |
| MOVW R1, nsec+8(FP) |
| RET |
| |
| // func fallback_nanotime() int64 |
| TEXT runtime·fallback_nanotime(SB),NOSPLIT,$24-8 |
| MOVD $CLOCK_MONOTONIC, R0 |
| MOVD $8(RSP), R1 |
| MOVD $SYS_clock_gettime, R8 |
| SVC |
| MOVD 8(RSP), R0 // sec |
| MOVW 16(RSP), R2 // nsec |
| |
| // sec is in R0, nsec in R2 |
| // return nsec in R2 |
| MOVD $1000000000, R3 |
| MUL R3, R0 |
| ADD R2, R0 |
| |
| MOVD R0, ret+0(FP) |
| RET |
| |
| // func asmSigaction(sig uintptr, new, old *sigactiont) int32 |
| TEXT runtime·asmSigaction(SB),NOSPLIT|NOFRAME,$0 |
| MOVD sig+0(FP), R0 // arg 1 sig |
| MOVD new+8(FP), R1 // arg 2 act |
| MOVD old+16(FP), R2 // arg 3 oact |
| MOVD $SYS_sigaction, R8 |
| SVC |
| BCC ok |
| MOVW $-1, R0 |
| ok: |
| MOVW R0, ret+24(FP) |
| RET |
| |
| // func sigfwd(fn uintptr, sig uint32, info *siginfo, ctx unsafe.Pointer) |
| TEXT runtime·sigfwd(SB),NOSPLIT,$0-32 |
| MOVW sig+8(FP), R0 |
| MOVD info+16(FP), R1 |
| MOVD ctx+24(FP), R2 |
| MOVD fn+0(FP), R11 |
| BL (R11) |
| RET |
| |
| // func sigtramp() |
| TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$176 |
| // Save callee-save registers in the case of signal forwarding. |
| // Please refer to https://golang.org/issue/31827 . |
| SAVE_R19_TO_R28(8*4) |
| SAVE_F8_TO_F15(8*14) |
| |
| // this might be called in external code context, |
| // where g is not set. |
| // first save R0, because runtime·load_g will clobber it |
| MOVW R0, 8(RSP) |
| MOVBU runtime·iscgo(SB), R0 |
| CMP $0, R0 |
| BEQ 2(PC) |
| BL runtime·load_g(SB) |
| |
| #ifdef GOEXPERIMENT_regabiargs |
| // Restore signum to R0. |
| MOVW 8(RSP), R0 |
| // R1 and R2 already contain info and ctx, respectively. |
| #else |
| MOVD R1, 16(RSP) |
| MOVD R2, 24(RSP) |
| #endif |
| MOVD $runtime·sigtrampgo<ABIInternal>(SB), R3 |
| BL (R3) |
| |
| // Restore callee-save registers. |
| RESTORE_R19_TO_R28(8*4) |
| RESTORE_F8_TO_F15(8*14) |
| |
| RET |
| |
| // func mmap(addr uintptr, n uintptr, prot int, flags int, fd int, off int64) (ret uintptr, err error) |
| TEXT runtime·mmap(SB),NOSPLIT|NOFRAME,$0 |
| MOVD addr+0(FP), R0 |
| MOVD n+8(FP), R1 |
| MOVW prot+16(FP), R2 |
| MOVW flags+20(FP), R3 |
| MOVW fd+24(FP), R4 |
| MOVW off+28(FP), R5 |
| MOVD $SYS_mmap, R8 |
| SVC |
| BCS fail |
| MOVD R0, p+32(FP) |
| MOVD $0, err+40(FP) |
| RET |
| fail: |
| MOVD $0, p+32(FP) |
| MOVD R0, err+40(FP) |
| RET |
| |
| // func munmap(addr uintptr, n uintptr) (err error) |
| TEXT runtime·munmap(SB),NOSPLIT|NOFRAME,$0 |
| MOVD addr+0(FP), R0 |
| MOVD n+8(FP), R1 |
| MOVD $SYS_munmap, R8 |
| SVC |
| BCS fail |
| RET |
| fail: |
| MOVD $0, R0 |
| MOVD R0, (R0) // crash |
| |
| // func madvise(addr unsafe.Pointer, n uintptr, flags int32) int32 |
| TEXT runtime·madvise(SB),NOSPLIT|NOFRAME,$0 |
| MOVD addr+0(FP), R0 |
| MOVD n+8(FP), R1 |
| MOVW flags+16(FP), R2 |
| MOVD $SYS_madvise, R8 |
| SVC |
| BCC ok |
| MOVW $-1, R0 |
| ok: |
| MOVW R0, ret+24(FP) |
| RET |
| |
| // func sysctl(mib *uint32, miblen uint32, out *byte, size *uintptr, dst *byte, ndst uintptr) int32 |
| TEXT runtime·sysctl(SB),NOSPLIT,$0 |
| MOVD mib+0(FP), R0 |
| MOVD miblen+8(FP), R1 |
| MOVD out+16(FP), R2 |
| MOVD size+24(FP), R3 |
| MOVD dst+32(FP), R4 |
| MOVD ndst+40(FP), R5 |
| MOVD $SYS___sysctl, R8 |
| SVC |
| BCC ok |
| NEG R0, R0 |
| ok: |
| MOVW R0, ret+48(FP) |
| RET |
| |
| // func sigaltstack(new, old *stackt) |
| TEXT runtime·sigaltstack(SB),NOSPLIT|NOFRAME,$0 |
| MOVD new+0(FP), R0 |
| MOVD old+8(FP), R1 |
| MOVD $SYS_sigaltstack, R8 |
| SVC |
| BCS fail |
| RET |
| fail: |
| MOVD $0, R0 |
| MOVD R0, (R0) // crash |
| |
| // func osyield() |
| TEXT runtime·osyield(SB),NOSPLIT|NOFRAME,$0 |
| MOVD $SYS_sched_yield, R8 |
| SVC |
| RET |
| |
| // func sigprocmask(how int32, new, old *sigset) |
| TEXT runtime·sigprocmask(SB),NOSPLIT|NOFRAME,$0-24 |
| MOVW how+0(FP), R0 |
| MOVD new+8(FP), R1 |
| MOVD old+16(FP), R2 |
| MOVD $SYS_sigprocmask, R8 |
| SVC |
| BCS fail |
| RET |
| fail: |
| MOVD $0, R0 |
| MOVD R0, (R0) // crash |
| |
| // func cpuset_getaffinity(level int, which int, id int64, size int, mask *byte) int32 |
| TEXT runtime·cpuset_getaffinity(SB),NOSPLIT|NOFRAME,$0-44 |
| MOVD level+0(FP), R0 |
| MOVD which+8(FP), R1 |
| MOVD id+16(FP), R2 |
| MOVD size+24(FP), R3 |
| MOVD mask+32(FP), R4 |
| MOVD $SYS_cpuset_getaffinity, R8 |
| SVC |
| BCC ok |
| MOVW $-1, R0 |
| ok: |
| MOVW R0, ret+40(FP) |
| RET |
| |
| // func kqueue() int32 |
| TEXT runtime·kqueue(SB),NOSPLIT|NOFRAME,$0 |
| MOVD $SYS_kqueue, R8 |
| SVC |
| BCC ok |
| MOVW $-1, R0 |
| ok: |
| MOVW R0, ret+0(FP) |
| RET |
| |
| // func kevent(kq int, ch unsafe.Pointer, nch int, ev unsafe.Pointer, nev int, ts *Timespec) (n int, err error) |
| TEXT runtime·kevent(SB),NOSPLIT,$0 |
| MOVW kq+0(FP), R0 |
| MOVD ch+8(FP), R1 |
| MOVW nch+16(FP), R2 |
| MOVD ev+24(FP), R3 |
| MOVW nev+32(FP), R4 |
| MOVD ts+40(FP), R5 |
| MOVD $SYS_kevent, R8 |
| SVC |
| BCC ok |
| NEG R0, R0 |
| ok: |
| MOVW R0, ret+48(FP) |
| RET |
| |
| // func closeonexec(fd int32) |
| TEXT runtime·closeonexec(SB),NOSPLIT|NOFRAME,$0 |
| MOVW fd+0(FP), R0 |
| MOVD $F_SETFD, R1 |
| MOVD $FD_CLOEXEC, R2 |
| MOVD $SYS_fcntl, R8 |
| SVC |
| RET |
| |
| // func getCntxct(physical bool) uint32 |
| TEXT runtime·getCntxct(SB),NOSPLIT,$0 |
| MOVB physical+0(FP), R0 |
| CMP $0, R0 |
| BEQ 3(PC) |
| |
| // get CNTPCT (Physical Count Register) into R0 |
| MRS CNTPCT_EL0, R0 // SIGILL |
| B 2(PC) |
| |
| // get CNTVCT (Virtual Count Register) into R0 |
| MRS CNTVCT_EL0, R0 |
| |
| MOVW R0, ret+8(FP) |
| RET |
