mirror of
https://github.com/golang/go
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862ddb37b4
Change-Id: Iec9de5ca56eb68d524bbaa0668515dbd09ad38a1 Reviewed-on: https://go-review.googlesource.com/c/go/+/314770 Trust: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com>
401 lines
9.2 KiB
ArmAsm
401 lines
9.2 KiB
ArmAsm
// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//
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// System calls and other sys.stuff for mips64, OpenBSD
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// /usr/src/sys/kern/syscalls.master for syscall numbers.
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//
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#include "go_asm.h"
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#include "go_tls.h"
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#include "textflag.h"
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#define CLOCK_REALTIME $0
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#define CLOCK_MONOTONIC $3
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// Exit the entire program (like C exit)
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TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
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MOVW code+0(FP), R4 // arg 1 - status
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MOVV $1, R2 // sys_exit
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SYSCALL
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BEQ R7, 3(PC)
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MOVV $0, R2 // crash on syscall failure
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MOVV R2, (R2)
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RET
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// func exitThread(wait *uint32)
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TEXT runtime·exitThread(SB),NOSPLIT,$0
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MOVV wait+0(FP), R4 // arg 1 - notdead
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MOVV $302, R2 // sys___threxit
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SYSCALL
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MOVV $0, R2 // crash on syscall failure
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MOVV R2, (R2)
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JMP 0(PC)
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TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0
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MOVV name+0(FP), R4 // arg 1 - path
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MOVW mode+8(FP), R5 // arg 2 - mode
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MOVW perm+12(FP), R6 // arg 3 - perm
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MOVV $5, R2 // sys_open
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SYSCALL
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BEQ R7, 2(PC)
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MOVW $-1, R2
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MOVW R2, ret+16(FP)
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RET
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TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0
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MOVW fd+0(FP), R4 // arg 1 - fd
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MOVV $6, R2 // sys_close
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SYSCALL
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BEQ R7, 2(PC)
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MOVW $-1, R2
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MOVW R2, ret+8(FP)
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RET
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TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0
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MOVW fd+0(FP), R4 // arg 1 - fd
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MOVV p+8(FP), R5 // arg 2 - buf
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MOVW n+16(FP), R6 // arg 3 - nbyte
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MOVV $3, R2 // sys_read
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SYSCALL
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BEQ R7, 2(PC)
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SUBVU R2, R0, R2 // caller expects negative errno
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MOVW R2, ret+24(FP)
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RET
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// func pipe() (r, w int32, errno int32)
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TEXT runtime·pipe(SB),NOSPLIT|NOFRAME,$0-12
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MOVV $r+0(FP), R4
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MOVW $0, R5
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MOVV $101, R2 // sys_pipe2
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SYSCALL
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BEQ R7, 2(PC)
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SUBVU R2, R0, R2 // caller expects negative errno
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MOVW R2, errno+8(FP)
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RET
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// func pipe2(flags int32) (r, w int32, errno int32)
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TEXT runtime·pipe2(SB),NOSPLIT|NOFRAME,$0-20
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MOVV $r+8(FP), R4
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MOVW flags+0(FP), R5
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MOVV $101, R2 // sys_pipe2
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SYSCALL
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BEQ R7, 2(PC)
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SUBVU R2, R0, R2 // caller expects negative errno
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MOVW R2, errno+16(FP)
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RET
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TEXT runtime·write1(SB),NOSPLIT|NOFRAME,$0
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MOVV fd+0(FP), R4 // arg 1 - fd
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MOVV p+8(FP), R5 // arg 2 - buf
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MOVW n+16(FP), R6 // arg 3 - nbyte
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MOVV $4, R2 // sys_write
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SYSCALL
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BEQ R7, 2(PC)
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SUBVU R2, R0, R2 // caller expects negative errno
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MOVW R2, ret+24(FP)
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RET
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TEXT runtime·usleep(SB),NOSPLIT,$24-4
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MOVWU usec+0(FP), R3
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MOVV R3, R5
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MOVW $1000000, R4
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DIVVU R4, R3
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MOVV LO, R3
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MOVV R3, 8(R29) // tv_sec
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MOVW $1000, R4
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MULVU R3, R4
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MOVV LO, R4
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SUBVU R4, R5
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MOVV R5, 16(R29) // tv_nsec
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ADDV $8, R29, R4 // arg 1 - rqtp
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MOVV $0, R5 // arg 2 - rmtp
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MOVV $91, R2 // sys_nanosleep
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SYSCALL
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RET
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TEXT runtime·getthrid(SB),NOSPLIT,$0-4
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MOVV $299, R2 // sys_getthrid
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SYSCALL
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MOVW R2, ret+0(FP)
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RET
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TEXT runtime·thrkill(SB),NOSPLIT,$0-16
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MOVW tid+0(FP), R4 // arg 1 - tid
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MOVV sig+8(FP), R5 // arg 2 - signum
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MOVW $0, R6 // arg 3 - tcb
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MOVV $119, R2 // sys_thrkill
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SYSCALL
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RET
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TEXT runtime·raiseproc(SB),NOSPLIT,$0
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MOVV $20, R4 // sys_getpid
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SYSCALL
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MOVV R2, R4 // arg 1 - pid
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MOVW sig+0(FP), R5 // arg 2 - signum
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MOVV $122, R2 // sys_kill
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SYSCALL
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RET
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TEXT runtime·mmap(SB),NOSPLIT,$0
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MOVV addr+0(FP), R4 // arg 1 - addr
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MOVV n+8(FP), R5 // arg 2 - len
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MOVW prot+16(FP), R6 // arg 3 - prot
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MOVW flags+20(FP), R7 // arg 4 - flags
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MOVW fd+24(FP), R8 // arg 5 - fd
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MOVW $0, R9 // arg 6 - pad
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MOVW off+28(FP), R10 // arg 7 - offset
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MOVV $197, R2 // sys_mmap
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SYSCALL
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MOVV $0, R4
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BEQ R7, 3(PC)
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MOVV R2, R4 // if error, move to R4
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MOVV $0, R2
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MOVV R2, p+32(FP)
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MOVV R4, err+40(FP)
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RET
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TEXT runtime·munmap(SB),NOSPLIT,$0
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MOVV addr+0(FP), R4 // arg 1 - addr
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MOVV n+8(FP), R5 // arg 2 - len
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MOVV $73, R2 // sys_munmap
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SYSCALL
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BEQ R7, 3(PC)
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MOVV $0, R2 // crash on syscall failure
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MOVV R2, (R2)
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RET
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TEXT runtime·madvise(SB),NOSPLIT,$0
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MOVV addr+0(FP), R4 // arg 1 - addr
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MOVV n+8(FP), R5 // arg 2 - len
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MOVW flags+16(FP), R6 // arg 2 - flags
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MOVV $75, R2 // sys_madvise
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SYSCALL
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BEQ R7, 2(PC)
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MOVW $-1, R2
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MOVW R2, ret+24(FP)
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RET
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TEXT runtime·setitimer(SB),NOSPLIT,$0
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MOVW mode+0(FP), R4 // arg 1 - mode
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MOVV new+8(FP), R5 // arg 2 - new value
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MOVV old+16(FP), R6 // arg 3 - old value
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MOVV $69, R2 // sys_setitimer
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SYSCALL
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RET
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// func walltime() (sec int64, nsec int32)
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TEXT runtime·walltime(SB), NOSPLIT, $32
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MOVW CLOCK_REALTIME, R4 // arg 1 - clock_id
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MOVV $8(R29), R5 // arg 2 - tp
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MOVV $87, R2 // sys_clock_gettime
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SYSCALL
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MOVV 8(R29), R4 // sec
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MOVV 16(R29), R5 // nsec
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MOVV R4, sec+0(FP)
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MOVW R5, nsec+8(FP)
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RET
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// int64 nanotime1(void) so really
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// void nanotime1(int64 *nsec)
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TEXT runtime·nanotime1(SB),NOSPLIT,$32
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MOVW CLOCK_MONOTONIC, R4 // arg 1 - clock_id
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MOVV $8(R29), R5 // arg 2 - tp
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MOVV $87, R2 // sys_clock_gettime
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SYSCALL
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MOVV 8(R29), R3 // sec
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MOVV 16(R29), R5 // nsec
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MOVV $1000000000, R4
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MULVU R4, R3
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MOVV LO, R3
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ADDVU R5, R3
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MOVV R3, ret+0(FP)
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RET
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TEXT runtime·sigaction(SB),NOSPLIT,$0
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MOVW sig+0(FP), R4 // arg 1 - signum
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MOVV new+8(FP), R5 // arg 2 - new sigaction
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MOVV old+16(FP), R6 // arg 3 - old sigaction
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MOVV $46, R2 // sys_sigaction
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SYSCALL
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BEQ R7, 3(PC)
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MOVV $3, R2 // crash on syscall failure
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MOVV R2, (R2)
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RET
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TEXT runtime·obsdsigprocmask(SB),NOSPLIT,$0
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MOVW how+0(FP), R4 // arg 1 - mode
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MOVW new+4(FP), R5 // arg 2 - new
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MOVV $48, R2 // sys_sigprocmask
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SYSCALL
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BEQ R7, 3(PC)
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MOVV $3, R2 // crash on syscall failure
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MOVV R2, (R2)
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MOVW R2, ret+8(FP)
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RET
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TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
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MOVW sig+8(FP), R4
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MOVV info+16(FP), R5
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MOVV ctx+24(FP), R6
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MOVV fn+0(FP), R25 // Must use R25, needed for PIC code.
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CALL (R25)
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RET
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TEXT runtime·sigtramp(SB),NOSPLIT,$192
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// initialize REGSB = PC&0xffffffff00000000
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BGEZAL R0, 1(PC)
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SRLV $32, R31, RSB
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SLLV $32, RSB
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// this might be called in external code context,
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// where g is not set.
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MOVB runtime·iscgo(SB), R1
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BEQ R1, 2(PC)
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JAL runtime·load_g(SB)
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MOVW R4, 8(R29)
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MOVV R5, 16(R29)
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MOVV R6, 24(R29)
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MOVV $runtime·sigtrampgo(SB), R1
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JAL (R1)
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RET
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// int32 tfork(void *param, uintptr psize, M *mp, G *gp, void (*fn)(void));
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TEXT runtime·tfork(SB),NOSPLIT,$0
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// Copy mp, gp and fn off parent stack for use by child.
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MOVV mm+16(FP), R16
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MOVV gg+24(FP), R17
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MOVV fn+32(FP), R18
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MOVV param+0(FP), R4 // arg 1 - param
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MOVV psize+8(FP), R5 // arg 2 - psize
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MOVV $8, R2 // sys___tfork
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SYSCALL
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// Return if syscall failed.
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BEQ R7, 4(PC)
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SUBVU R2, R0, R2 // caller expects negative errno
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MOVW R2, ret+40(FP)
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RET
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// In parent, return.
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BEQ R2, 3(PC)
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MOVW R2, ret+40(FP)
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RET
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// Initialise m, g.
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MOVV R17, g
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MOVV R16, g_m(g)
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// Call fn.
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CALL (R18)
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// fn should never return.
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MOVV $2, R8 // crash if reached
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MOVV R8, (R8)
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RET
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TEXT runtime·sigaltstack(SB),NOSPLIT,$0
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MOVV new+0(FP), R4 // arg 1 - new sigaltstack
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MOVV old+8(FP), R5 // arg 2 - old sigaltstack
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MOVV $288, R2 // sys_sigaltstack
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SYSCALL
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BEQ R7, 3(PC)
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MOVV $0, R8 // crash on syscall failure
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MOVV R8, (R8)
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RET
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TEXT runtime·osyield(SB),NOSPLIT,$0
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MOVV $298, R2 // sys_sched_yield
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SYSCALL
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RET
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TEXT runtime·thrsleep(SB),NOSPLIT,$0
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MOVV ident+0(FP), R4 // arg 1 - ident
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MOVW clock_id+8(FP), R5 // arg 2 - clock_id
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MOVV tsp+16(FP), R6 // arg 3 - tsp
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MOVV lock+24(FP), R7 // arg 4 - lock
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MOVV abort+32(FP), R8 // arg 5 - abort
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MOVV $94, R2 // sys___thrsleep
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SYSCALL
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MOVW R2, ret+40(FP)
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RET
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TEXT runtime·thrwakeup(SB),NOSPLIT,$0
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MOVV ident+0(FP), R4 // arg 1 - ident
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MOVW n+8(FP), R5 // arg 2 - n
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MOVV $301, R2 // sys___thrwakeup
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SYSCALL
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MOVW R2, ret+16(FP)
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RET
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TEXT runtime·sysctl(SB),NOSPLIT,$0
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MOVV mib+0(FP), R4 // arg 1 - mib
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MOVW miblen+8(FP), R5 // arg 2 - miblen
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MOVV out+16(FP), R6 // arg 3 - out
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MOVV size+24(FP), R7 // arg 4 - size
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MOVV dst+32(FP), R8 // arg 5 - dest
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MOVV ndst+40(FP), R9 // arg 6 - newlen
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MOVV $202, R2 // sys___sysctl
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SYSCALL
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BEQ R7, 2(PC)
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SUBVU R2, R0, R2 // caller expects negative errno
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MOVW R2, ret+48(FP)
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RET
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// int32 runtime·kqueue(void);
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TEXT runtime·kqueue(SB),NOSPLIT,$0
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MOVV $269, R2 // sys_kqueue
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SYSCALL
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BEQ R7, 2(PC)
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SUBVU R2, R0, R2 // caller expects negative errno
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MOVW R2, ret+0(FP)
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RET
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// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout);
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TEXT runtime·kevent(SB),NOSPLIT,$0
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MOVW kq+0(FP), R4 // arg 1 - kq
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MOVV ch+8(FP), R5 // arg 2 - changelist
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MOVW nch+16(FP), R6 // arg 3 - nchanges
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MOVV ev+24(FP), R7 // arg 4 - eventlist
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MOVW nev+32(FP), R8 // arg 5 - nevents
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MOVV ts+40(FP), R9 // arg 6 - timeout
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MOVV $72, R2 // sys_kevent
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SYSCALL
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BEQ R7, 2(PC)
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SUBVU R2, R0, R2 // caller expects negative errno
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MOVW R2, ret+48(FP)
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RET
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// func closeonexec(fd int32)
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TEXT runtime·closeonexec(SB),NOSPLIT,$0
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MOVW fd+0(FP), R4 // arg 1 - fd
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MOVV $2, R5 // arg 2 - cmd (F_SETFD)
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MOVV $1, R6 // arg 3 - arg (FD_CLOEXEC)
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MOVV $92, R2 // sys_fcntl
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SYSCALL
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RET
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// func runtime·setNonblock(int32 fd)
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TEXT runtime·setNonblock(SB),NOSPLIT|NOFRAME,$0-4
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MOVW fd+0(FP), R4 // arg 1 - fd
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MOVV $3, R5 // arg 2 - cmd (F_GETFL)
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MOVV $0, R6 // arg 3
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MOVV $92, R2 // sys_fcntl
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SYSCALL
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MOVV $4, R6 // O_NONBLOCK
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OR R2, R6 // arg 3 - flags
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MOVW fd+0(FP), R4 // arg 1 - fd
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MOVV $4, R5 // arg 2 - cmd (F_SETFL)
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MOVV $92, R2 // sys_fcntl
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SYSCALL
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RET
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