mirror of
https://github.com/golang/go
synced 2024-11-19 13:04:45 -07:00
0e3355903d
See https://golang.org/design/12914-monotonic for details. Fixes #12914. Change-Id: I80edc2e6c012b4ace7161c84cf067d444381a009 Reviewed-on: https://go-review.googlesource.com/36255 Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Caleb Spare <cespare@gmail.com> Reviewed-by: Ian Lance Taylor <iant@golang.org>
374 lines
8.5 KiB
ArmAsm
374 lines
8.5 KiB
ArmAsm
// Copyright 2009 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 ARM, OpenBSD
|
|
// /usr/src/sys/kern/syscalls.master for syscall numbers.
|
|
//
|
|
|
|
#include "go_asm.h"
|
|
#include "go_tls.h"
|
|
#include "textflag.h"
|
|
|
|
#define CLOCK_REALTIME $0
|
|
#define CLOCK_MONOTONIC $3
|
|
|
|
// Exit the entire program (like C exit)
|
|
TEXT runtime·exit(SB),NOSPLIT,$-4
|
|
MOVW code+0(FP), R0 // arg 1 - status
|
|
MOVW $1, R12 // sys_exit
|
|
SWI $0
|
|
MOVW.CS $0, R8 // crash on syscall failure
|
|
MOVW.CS R8, (R8)
|
|
RET
|
|
|
|
TEXT runtime·exit1(SB),NOSPLIT,$-4
|
|
MOVW $0, R0 // arg 1 - notdead
|
|
MOVW $302, R12 // sys___threxit
|
|
SWI $0
|
|
MOVW.CS $1, R8 // crash on syscall failure
|
|
MOVW.CS R8, (R8)
|
|
RET
|
|
|
|
TEXT runtime·open(SB),NOSPLIT,$-4
|
|
MOVW name+0(FP), R0 // arg 1 - path
|
|
MOVW mode+4(FP), R1 // arg 2 - mode
|
|
MOVW perm+8(FP), R2 // arg 3 - perm
|
|
MOVW $5, R12 // sys_open
|
|
SWI $0
|
|
MOVW.CS $-1, R0
|
|
MOVW R0, ret+12(FP)
|
|
RET
|
|
|
|
TEXT runtime·closefd(SB),NOSPLIT,$-4
|
|
MOVW fd+0(FP), R0 // arg 1 - fd
|
|
MOVW $6, R12 // sys_close
|
|
SWI $0
|
|
MOVW.CS $-1, R0
|
|
MOVW R0, ret+4(FP)
|
|
RET
|
|
|
|
TEXT runtime·read(SB),NOSPLIT,$-4
|
|
MOVW fd+0(FP), R0 // arg 1 - fd
|
|
MOVW p+4(FP), R1 // arg 2 - buf
|
|
MOVW n+8(FP), R2 // arg 3 - nbyte
|
|
MOVW $3, R12 // sys_read
|
|
SWI $0
|
|
MOVW.CS $-1, R0
|
|
MOVW R0, ret+12(FP)
|
|
RET
|
|
|
|
TEXT runtime·write(SB),NOSPLIT,$-4
|
|
MOVW fd+0(FP), R0 // arg 1 - fd
|
|
MOVW p+4(FP), R1 // arg 2 - buf
|
|
MOVW n+8(FP), R2 // arg 3 - nbyte
|
|
MOVW $4, R12 // sys_write
|
|
SWI $0
|
|
MOVW.CS $-1, R0
|
|
MOVW R0, ret+12(FP)
|
|
RET
|
|
|
|
TEXT runtime·usleep(SB),NOSPLIT,$16
|
|
MOVW usec+0(FP), R0
|
|
CALL runtime·usplitR0(SB)
|
|
MOVW R0, 4(R13) // tv_sec - l32
|
|
MOVW $0, R0
|
|
MOVW R0, 8(R13) // tv_sec - h32
|
|
MOVW $1000, R2
|
|
MUL R1, R2
|
|
MOVW R2, 12(R13) // tv_nsec
|
|
|
|
MOVW $4(R13), R0 // arg 1 - rqtp
|
|
MOVW $0, R1 // arg 2 - rmtp
|
|
MOVW $91, R12 // sys_nanosleep
|
|
SWI $0
|
|
RET
|
|
|
|
TEXT runtime·raise(SB),NOSPLIT,$12
|
|
MOVW $0x12B, R12
|
|
SWI $0 // sys_getthrid
|
|
// arg 1 - tid, already in R0
|
|
MOVW sig+0(FP), R1 // arg 2 - signum
|
|
MOVW $0, R2 // arg 3 - tcb
|
|
MOVW $119, R12 // sys_thrkill
|
|
SWI $0
|
|
RET
|
|
|
|
TEXT runtime·raiseproc(SB),NOSPLIT,$12
|
|
MOVW $20, R12
|
|
SWI $0 // sys_getpid
|
|
// arg 1 - pid, already in R0
|
|
MOVW sig+0(FP), R1 // arg 2 - signum
|
|
MOVW $122, R12 // sys_kill
|
|
SWI $0
|
|
RET
|
|
|
|
TEXT runtime·mmap(SB),NOSPLIT,$16
|
|
MOVW addr+0(FP), R0 // arg 1 - addr
|
|
MOVW n+4(FP), R1 // arg 2 - len
|
|
MOVW prot+8(FP), R2 // arg 3 - prot
|
|
MOVW flags+12(FP), R3 // arg 4 - flags
|
|
MOVW fd+16(FP), R4 // arg 5 - fd (on stack)
|
|
MOVW R4, 4(R13)
|
|
MOVW $0, R5 // arg 6 - pad (on stack)
|
|
MOVW R5, 8(R13)
|
|
MOVW off+20(FP), R6 // arg 7 - offset (on stack)
|
|
MOVW R6, 12(R13) // lower 32 bits (from Go runtime)
|
|
MOVW $0, R7
|
|
MOVW R7, 16(R13) // high 32 bits
|
|
ADD $4, R13
|
|
MOVW $197, R12 // sys_mmap
|
|
SWI $0
|
|
SUB $4, R13
|
|
MOVW R0, ret+24(FP)
|
|
RET
|
|
|
|
TEXT runtime·munmap(SB),NOSPLIT,$0
|
|
MOVW addr+0(FP), R0 // arg 1 - addr
|
|
MOVW n+4(FP), R1 // arg 2 - len
|
|
MOVW $73, R12 // sys_munmap
|
|
SWI $0
|
|
MOVW.CS $0, R8 // crash on syscall failure
|
|
MOVW.CS R8, (R8)
|
|
RET
|
|
|
|
TEXT runtime·madvise(SB),NOSPLIT,$0
|
|
MOVW addr+0(FP), R0 // arg 1 - addr
|
|
MOVW n+4(FP), R1 // arg 2 - len
|
|
MOVW flags+8(FP), R2 // arg 2 - flags
|
|
MOVW $75, R12 // sys_madvise
|
|
SWI $0
|
|
MOVW.CS $0, R8 // crash on syscall failure
|
|
MOVW.CS R8, (R8)
|
|
RET
|
|
|
|
TEXT runtime·setitimer(SB),NOSPLIT,$0
|
|
MOVW mode+0(FP), R0 // arg 1 - mode
|
|
MOVW new+4(FP), R1 // arg 2 - new value
|
|
MOVW old+8(FP), R2 // arg 3 - old value
|
|
MOVW $69, R12 // sys_setitimer
|
|
SWI $0
|
|
RET
|
|
|
|
// func walltime() (sec int64, nsec int32)
|
|
TEXT runtime·walltime(SB), NOSPLIT, $32
|
|
MOVW CLOCK_REALTIME, R0 // arg 1 - clock_id
|
|
MOVW $8(R13), R1 // arg 2 - tp
|
|
MOVW $87, R12 // sys_clock_gettime
|
|
SWI $0
|
|
|
|
MOVW 8(R13), R0 // sec - l32
|
|
MOVW 12(R13), R1 // sec - h32
|
|
MOVW 16(R13), R2 // nsec
|
|
|
|
MOVW R0, sec_lo+0(FP)
|
|
MOVW R1, sec_hi+4(FP)
|
|
MOVW R2, nsec+8(FP)
|
|
|
|
RET
|
|
|
|
// int64 nanotime(void) so really
|
|
// void nanotime(int64 *nsec)
|
|
TEXT runtime·nanotime(SB),NOSPLIT,$32
|
|
MOVW CLOCK_MONOTONIC, R0 // arg 1 - clock_id
|
|
MOVW $8(R13), R1 // arg 2 - tp
|
|
MOVW $87, R12 // sys_clock_gettime
|
|
SWI $0
|
|
|
|
MOVW 8(R13), R0 // sec - l32
|
|
MOVW 12(R13), R4 // sec - h32
|
|
MOVW 16(R13), R2 // nsec
|
|
|
|
MOVW $1000000000, R3
|
|
MULLU R0, R3, (R1, R0)
|
|
MUL R3, R4
|
|
ADD.S R2, R0
|
|
ADC R4, R1
|
|
|
|
MOVW R0, ret_lo+0(FP)
|
|
MOVW R1, ret_hi+4(FP)
|
|
RET
|
|
|
|
TEXT runtime·sigaction(SB),NOSPLIT,$0
|
|
MOVW sig+0(FP), R0 // arg 1 - signum
|
|
MOVW new+4(FP), R1 // arg 2 - new sigaction
|
|
MOVW old+8(FP), R2 // arg 3 - old sigaction
|
|
MOVW $46, R12 // sys_sigaction
|
|
SWI $0
|
|
MOVW.CS $3, R8 // crash on syscall failure
|
|
MOVW.CS R8, (R8)
|
|
RET
|
|
|
|
TEXT runtime·obsdsigprocmask(SB),NOSPLIT,$0
|
|
MOVW how+0(FP), R0 // arg 1 - mode
|
|
MOVW new+4(FP), R1 // arg 2 - new
|
|
MOVW $48, R12 // sys_sigprocmask
|
|
SWI $0
|
|
MOVW.CS $3, R8 // crash on syscall failure
|
|
MOVW.CS R8, (R8)
|
|
MOVW R0, ret+8(FP)
|
|
RET
|
|
|
|
TEXT runtime·sigfwd(SB),NOSPLIT,$0-16
|
|
MOVW sig+4(FP), R0
|
|
MOVW info+8(FP), R1
|
|
MOVW ctx+12(FP), R2
|
|
MOVW fn+0(FP), R11
|
|
MOVW R13, R4
|
|
SUB $24, R13
|
|
BIC $0x7, R13 // alignment for ELF ABI
|
|
BL (R11)
|
|
MOVW R4, R13
|
|
RET
|
|
|
|
TEXT runtime·sigtramp(SB),NOSPLIT,$12
|
|
// If called from an external code context, g will not be set.
|
|
// Save R0, since runtime·load_g will clobber it.
|
|
MOVW R0, 4(R13) // signum
|
|
MOVB runtime·iscgo(SB), R0
|
|
CMP $0, R0
|
|
BL.NE runtime·load_g(SB)
|
|
|
|
MOVW R1, 8(R13)
|
|
MOVW R2, 12(R13)
|
|
BL runtime·sigtrampgo(SB)
|
|
RET
|
|
|
|
// int32 tfork(void *param, uintptr psize, M *mp, G *gp, void (*fn)(void));
|
|
TEXT runtime·tfork(SB),NOSPLIT,$0
|
|
|
|
// Copy mp, gp and fn off parent stack for use by child.
|
|
MOVW mm+8(FP), R4
|
|
MOVW gg+12(FP), R5
|
|
MOVW fn+16(FP), R6
|
|
|
|
MOVW param+0(FP), R0 // arg 1 - param
|
|
MOVW psize+4(FP), R1 // arg 2 - psize
|
|
MOVW $8, R12 // sys___tfork
|
|
SWI $0
|
|
|
|
// Return if syscall failed.
|
|
B.CC 4(PC)
|
|
RSB $0, R0
|
|
MOVW R0, ret+20(FP)
|
|
RET
|
|
|
|
// In parent, return.
|
|
CMP $0, R0
|
|
BEQ 3(PC)
|
|
MOVW R0, ret+20(FP)
|
|
RET
|
|
|
|
// Initialise m, g.
|
|
MOVW R5, g
|
|
MOVW R4, g_m(g)
|
|
|
|
// Paranoia; check that stack splitting code works.
|
|
BL runtime·emptyfunc(SB)
|
|
|
|
// Call fn.
|
|
BL (R6)
|
|
|
|
BL runtime·exit1(SB)
|
|
MOVW $2, R8 // crash if reached
|
|
MOVW R8, (R8)
|
|
RET
|
|
|
|
TEXT runtime·sigaltstack(SB),NOSPLIT,$0
|
|
MOVW new+0(FP), R0 // arg 1 - new sigaltstack
|
|
MOVW old+4(FP), R1 // arg 2 - old sigaltstack
|
|
MOVW $288, R12 // sys_sigaltstack
|
|
SWI $0
|
|
MOVW.CS $0, R8 // crash on syscall failure
|
|
MOVW.CS R8, (R8)
|
|
RET
|
|
|
|
TEXT runtime·osyield(SB),NOSPLIT,$0
|
|
MOVW $298, R12 // sys_sched_yield
|
|
SWI $0
|
|
RET
|
|
|
|
TEXT runtime·thrsleep(SB),NOSPLIT,$4
|
|
MOVW ident+0(FP), R0 // arg 1 - ident
|
|
MOVW clock_id+4(FP), R1 // arg 2 - clock_id
|
|
MOVW tsp+8(FP), R2 // arg 3 - tsp
|
|
MOVW lock+12(FP), R3 // arg 4 - lock
|
|
MOVW abort+16(FP), R4 // arg 5 - abort (on stack)
|
|
MOVW R4, 4(R13)
|
|
ADD $4, R13
|
|
MOVW $94, R12 // sys___thrsleep
|
|
SWI $0
|
|
SUB $4, R13
|
|
MOVW R0, ret+20(FP)
|
|
RET
|
|
|
|
TEXT runtime·thrwakeup(SB),NOSPLIT,$0
|
|
MOVW ident+0(FP), R0 // arg 1 - ident
|
|
MOVW n+4(FP), R1 // arg 2 - n
|
|
MOVW $301, R12 // sys___thrwakeup
|
|
SWI $0
|
|
MOVW R0, ret+8(FP)
|
|
RET
|
|
|
|
TEXT runtime·sysctl(SB),NOSPLIT,$8
|
|
MOVW mib+0(FP), R0 // arg 1 - mib
|
|
MOVW miblen+4(FP), R1 // arg 2 - miblen
|
|
MOVW out+8(FP), R2 // arg 3 - out
|
|
MOVW size+12(FP), R3 // arg 4 - size
|
|
MOVW dst+16(FP), R4 // arg 5 - dest (on stack)
|
|
MOVW R4, 4(R13)
|
|
MOVW ndst+20(FP), R5 // arg 6 - newlen (on stack)
|
|
MOVW R5, 8(R13)
|
|
ADD $4, R13
|
|
MOVW $202, R12 // sys___sysctl
|
|
SWI $0
|
|
SUB $4, R13
|
|
MOVW.CC $0, R0
|
|
RSB.CS $0, R0
|
|
MOVW R0, ret+24(FP)
|
|
RET
|
|
|
|
// int32 runtime·kqueue(void);
|
|
TEXT runtime·kqueue(SB),NOSPLIT,$0
|
|
MOVW $269, R12 // sys_kqueue
|
|
SWI $0
|
|
RSB.CS $0, R0
|
|
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,$8
|
|
MOVW kq+0(FP), R0 // arg 1 - kq
|
|
MOVW ch+4(FP), R1 // arg 2 - changelist
|
|
MOVW nch+8(FP), R2 // arg 3 - nchanges
|
|
MOVW ev+12(FP), R3 // arg 4 - eventlist
|
|
MOVW nev+16(FP), R4 // arg 5 - nevents (on stack)
|
|
MOVW R4, 4(R13)
|
|
MOVW ts+20(FP), R5 // arg 6 - timeout (on stack)
|
|
MOVW R5, 8(R13)
|
|
ADD $4, R13
|
|
MOVW $72, R12 // sys_kevent
|
|
SWI $0
|
|
RSB.CS $0, R0
|
|
SUB $4, R13
|
|
MOVW R0, ret+24(FP)
|
|
RET
|
|
|
|
// func closeonexec(fd int32)
|
|
TEXT runtime·closeonexec(SB),NOSPLIT,$0
|
|
MOVW fd+0(FP), R0 // arg 1 - fd
|
|
MOVW $2, R1 // arg 2 - cmd (F_SETFD)
|
|
MOVW $1, R2 // arg 3 - arg (FD_CLOEXEC)
|
|
MOVW $92, R12 // sys_fcntl
|
|
SWI $0
|
|
RET
|
|
|
|
TEXT ·publicationBarrier(SB),NOSPLIT,$-4-0
|
|
B runtime·armPublicationBarrier(SB)
|
|
|
|
// TODO(jsing): Implement.
|
|
TEXT runtime·read_tls_fallback(SB),NOSPLIT,$-4
|
|
MOVW $5, R0
|
|
MOVW R0, (R0)
|
|
RET
|