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sys_netbsd_arm64.s
// 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, NetBSD // #include "go_asm.h" #include "go_tls.h" #include "textflag.h" #include "cgo/abi_arm64.h" #define CLOCK_REALTIME 0 #define CLOCK_MONOTONIC 3 #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_munmap 73 #define SYS_madvise 75 #define SYS_fcntl 92 #define SYS_mmap 197 #define SYS___sysctl 202 #define SYS___sigaltstack14 281 #define SYS___sigprocmask14 293 #define SYS_issetugid 305 #define SYS_getcontext 307 #define SYS_setcontext 308 #define SYS__lwp_create 309 #define SYS__lwp_exit 310 #define SYS__lwp_self 311 #define SYS__lwp_kill 318 #define SYS__lwp_unpark 321 #define SYS___sigaction_sigtramp 340 #define SYS_kqueue 344 #define SYS_sched_yield 350 #define SYS___setitimer50 425 #define SYS___clock_gettime50 427 #define SYS___nanosleep50 430 #define SYS___kevent50 435 #define SYS_pipe2 453 #define SYS_openat 468 #define SYS____lwp_park60 478 // int32 lwp_create(void *context, uintptr flags, void *lwpid) TEXT runtime·lwp_create(SB),NOSPLIT,$0 MOVD ctxt+0(FP), R0 MOVD flags+8(FP), R1 MOVD lwpid+16(FP), R2 SVC $SYS__lwp_create BCC ok NEG R0, R0 ok: MOVW R0, ret+24(FP) RET TEXT runtime·lwp_tramp(SB),NOSPLIT,$0 CMP $0, R1 BEQ nog CMP $0, R2 BEQ nog MOVD R0, g_m(R1) MOVD R1, g nog: CALL (R2) MOVD $0, R0 // crash (not reached) MOVD R0, (R8) TEXT ·netbsdMstart(SB),NOSPLIT|TOPFRAME,$0 CALL ·netbsdMstart0(SB) RET // not reached TEXT runtime·osyield(SB),NOSPLIT,$0 SVC $SYS_sched_yield RET TEXT runtime·lwp_park(SB),NOSPLIT,$0 MOVW clockid+0(FP), R0 // arg 1 - clockid MOVW flags+4(FP), R1 // arg 2 - flags MOVD ts+8(FP), R2 // arg 3 - ts MOVW unpark+16(FP), R3 // arg 4 - unpark MOVD hint+24(FP), R4 // arg 5 - hint MOVD unparkhint+32(FP), R5 // arg 6 - unparkhint SVC $SYS____lwp_park60 MOVW R0, ret+40(FP) RET TEXT runtime·lwp_unpark(SB),NOSPLIT,$0 MOVW lwp+0(FP), R0 // arg 1 - lwp MOVD hint+8(FP), R1 // arg 2 - hint SVC $SYS__lwp_unpark MOVW R0, ret+16(FP) RET TEXT runtime·lwp_self(SB),NOSPLIT,$0 SVC $SYS__lwp_self MOVW R0, ret+0(FP) RET // Exit the entire program (like C exit) TEXT runtime·exit(SB),NOSPLIT,$-8 MOVW code+0(FP), R0 // arg 1 - exit status SVC $SYS_exit MOVD $0, R0 // If we're still running, MOVD R0, (R0) // crash // func exitThread(wait *atomic.Uint32) TEXT runtime·exitThread(SB),NOSPLIT,$0-8 MOVD wait+0(FP), R0 // We're done using the stack. MOVW $0, R1 STLRW R1, (R0) SVC $SYS__lwp_exit JMP 0(PC) TEXT runtime·open(SB),NOSPLIT|NOFRAME,$-8 MOVD name+0(FP), R0 // arg 1 - pathname MOVW mode+8(FP), R1 // arg 2 - flags MOVW perm+12(FP), R2 // arg 3 - mode SVC $SYS_open BCC ok MOVW $-1, R0 ok: MOVW R0, ret+16(FP) RET TEXT runtime·closefd(SB),NOSPLIT,$-8 MOVW fd+0(FP), R0 // arg 1 - fd SVC $SYS_close BCC ok MOVW $-1, R0 ok: MOVW R0, ret+8(FP) RET TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0 MOVW fd+0(FP), R0 // arg 1 - fd MOVD p+8(FP), R1 // arg 2 - buf MOVW n+16(FP), R2 // arg 3 - count SVC $SYS_read BCC ok NEG R0, R0 ok: MOVW R0, ret+24(FP) RET // func pipe2(flags int32) (r, w int32, errno int32) TEXT runtime·pipe2(SB),NOSPLIT|NOFRAME,$0-20 ADD $16, RSP, R0 MOVW flags+0(FP), R1 SVC $SYS_pipe2 BCC pipe2ok NEG R0, R0 pipe2ok: MOVW R0, errno+16(FP) RET TEXT runtime·write1(SB),NOSPLIT,$-8 MOVD fd+0(FP), R0 // arg 1 - fd MOVD p+8(FP), R1 // arg 2 - buf MOVW n+16(FP), R2 // arg 3 - nbyte SVC $SYS_write BCC ok NEG R0, R0 ok: MOVW R0, ret+24(FP) RET 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) // sec MUL R3, R4 SUB R4, R5 MOVW $1000, R4 MUL R4, R5 MOVD R5, 16(RSP) // nsec MOVD $8(RSP), R0 // arg 1 - rqtp MOVD $0, R1 // arg 2 - rmtp SVC $SYS___nanosleep50 RET TEXT runtime·lwp_kill(SB),NOSPLIT,$0-16 MOVW tid+0(FP), R0 // arg 1 - target MOVD sig+8(FP), R1 // arg 2 - signo SVC $SYS__lwp_kill RET TEXT runtime·raiseproc(SB),NOSPLIT,$16 SVC $SYS_getpid // arg 1 - pid (from getpid) MOVD sig+0(FP), R1 // arg 2 - signo SVC $SYS_kill RET TEXT runtime·setitimer(SB),NOSPLIT,$-8 MOVW mode+0(FP), R0 // arg 1 - which MOVD new+8(FP), R1 // arg 2 - itv MOVD old+16(FP), R2 // arg 3 - oitv SVC $SYS___setitimer50 RET // func walltime() (sec int64, nsec int32) TEXT runtime·walltime(SB), NOSPLIT, $32 MOVW $CLOCK_REALTIME, R0 // arg 1 - clock_id MOVD $8(RSP), R1 // arg 2 - tp SVC $SYS___clock_gettime50 MOVD 8(RSP), R0 // sec MOVD 16(RSP), R1 // nsec // sec is in R0, nsec in R1 MOVD R0, sec+0(FP) MOVW R1, nsec+8(FP) RET // int64 nanotime1(void) so really // void nanotime1(int64 *nsec) TEXT runtime·nanotime1(SB), NOSPLIT, $32 MOVD $CLOCK_MONOTONIC, R0 // arg 1 - clock_id MOVD $8(RSP), R1 // arg 2 - tp SVC $SYS___clock_gettime50 MOVD 8(RSP), R0 // sec MOVD 16(RSP), R2 // nsec // sec is in R0, nsec in R2 // return nsec in R2 MOVD $1000000000, R3 MUL R3, R0 ADD R2, R0 MOVD R0, ret+0(FP) RET TEXT runtime·getcontext(SB),NOSPLIT,$-8 MOVD ctxt+0(FP), R0 // arg 1 - context SVC $SYS_getcontext BCS fail RET fail: MOVD $0, R0 MOVD R0, (R0) // crash TEXT runtime·sigprocmask(SB),NOSPLIT,$0 MOVW how+0(FP), R0 // arg 1 - how MOVD new+8(FP), R1 // arg 2 - set MOVD old+16(FP), R2 // arg 3 - oset SVC $SYS___sigprocmask14 BCS fail RET fail: MOVD $0, R0 MOVD R0, (R0) // crash TEXT sigreturn_tramp<>(SB),NOSPLIT,$-8 MOVD g, R0 SVC $SYS_setcontext MOVD $0, R0 MOVD R0, (R0) // crash TEXT runtime·sigaction(SB),NOSPLIT,$-8 MOVW sig+0(FP), R0 // arg 1 - signum MOVD new+8(FP), R1 // arg 2 - nsa MOVD old+16(FP), R2 // arg 3 - osa // arg 4 - tramp MOVD $sigreturn_tramp<>(SB), R3 MOVW $2, R4 // arg 5 - vers SVC $SYS___sigaction_sigtramp BCS fail RET fail: MOVD $0, R0 MOVD R0, (R0) // crash // XXX ??? 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 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) // Unclobber g for now (kernel uses it as ucontext ptr) // See https://github.com/golang/go/issues/30824#issuecomment-492772426 // This is only correct in the non-cgo case. // XXX should use lwp_getprivate as suggested. // 8*36 is ucontext.uc_mcontext.__gregs[_REG_X28] MOVD 8*36(g), g // this might be called in external code context, // where g is not set. // first save R0, because runtime·load_g will clobber it MOVD R0, 8(RSP) // signum MOVB runtime·iscgo(SB), R0 CMP $0, R0 // XXX branch destination BEQ 2(PC) BL runtime·load_g(SB) // Restore signum to R0. MOVW 8(RSP), R0 // R1 and R2 already contain info and ctx, respectively. BL runtime·sigtrampgo<ABIInternal>(SB) // Restore callee-save registers. RESTORE_R19_TO_R28(8*4) RESTORE_F8_TO_F15(8*14) RET TEXT runtime·mmap(SB),NOSPLIT,$0 MOVD addr+0(FP), R0 // arg 1 - addr MOVD n+8(FP), R1 // arg 2 - len MOVW prot+16(FP), R2 // arg 3 - prot MOVW flags+20(FP), R3 // arg 4 - flags MOVW fd+24(FP), R4 // arg 5 - fd MOVW $0, R5 // arg 6 - pad MOVD off+28(FP), R6 // arg 7 - offset SVC $SYS_mmap 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 TEXT runtime·munmap(SB),NOSPLIT,$0 MOVD addr+0(FP), R0 // arg 1 - addr MOVD n+8(FP), R1 // arg 2 - len SVC $SYS_munmap BCS fail RET fail: MOVD $0, R0 MOVD R0, (R0) // crash TEXT runtime·madvise(SB),NOSPLIT,$0 MOVD addr+0(FP), R0 // arg 1 - addr MOVD n+8(FP), R1 // arg 2 - len MOVW flags+16(FP), R2 // arg 3 - behav SVC $SYS_madvise BCC ok MOVD $-1, R0 ok: MOVD R0, ret+24(FP) RET TEXT runtime·sigaltstack(SB),NOSPLIT,$0 MOVD new+0(FP), R0 // arg 1 - nss MOVD old+8(FP), R1 // arg 2 - oss SVC $SYS___sigaltstack14 BCS fail RET fail: MOVD $0, R0 MOVD R0, (R0) // crash TEXT runtime·sysctl(SB),NOSPLIT,$0 MOVD mib+0(FP), R0 // arg 1 - name MOVW miblen+8(FP), R1 // arg 2 - namelen MOVD out+16(FP), R2 // arg 3 - oldp MOVD size+24(FP), R3 // arg 4 - oldlenp MOVD dst+32(FP), R4 // arg 5 - newp MOVD ndst+40(FP), R5 // arg 6 - newlen SVC $SYS___sysctl BCC ok NEG R0, R0 ok: MOVW R0, ret+48(FP) RET // int32 runtime·kqueue(void) TEXT runtime·kqueue(SB),NOSPLIT,$0 MOVD $0, R0 SVC $SYS_kqueue BCC ok NEG R0, R0 ok: MOVW R0, ret+0(FP) RET // int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout) TEXT runtime·kevent(SB),NOSPLIT,$0 MOVW kq+0(FP), R0 // arg 1 - kq MOVD ch+8(FP), R1 // arg 2 - changelist MOVW nch+16(FP), R2 // arg 3 - nchanges MOVD ev+24(FP), R3 // arg 4 - eventlist MOVW nev+32(FP), R4 // arg 5 - nevents MOVD ts+40(FP), R5 // arg 6 - timeout SVC $SYS___kevent50 BCC ok NEG R0, R0 ok: MOVW R0, ret+48(FP) RET // func fcntl(fd, cmd, arg int32) (int32, int32) TEXT runtime·fcntl(SB),NOSPLIT,$0 MOVW fd+0(FP), R0 // fd MOVW cmd+4(FP), R1 // cmd MOVW arg+8(FP), R2 // arg SVC $SYS_fcntl BCC noerr MOVW $-1, R1 MOVW R1, ret+16(FP) MOVW R0, errno+20(FP) RET noerr: MOVW R0, ret+16(FP) MOVW $0, errno+20(FP) RET // func issetugid() int32 TEXT runtime·issetugid(SB),NOSPLIT|NOFRAME,$0 SVC $SYS_issetugid MOVW R0, ret+0(FP) RET
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