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// 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 status+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 path+0(FP), R0 // arg 1 - path
MOVW flags+4(FP), R1 // arg 2 - flags
MOVW mode+8(FP), R2 // arg 3 - mode
MOVW $5, R12 // sys_open
SWI $0
MOVW.CS $-1, R0
MOVW R0, ret+12(FP)
RET
TEXT runtime·closefd(SB),NOSPLIT,$-4
MOVW path+0(FP), R0 // arg 1 - path
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 buf+4(FP), R1 // arg 2 - buf
MOVW nbyte+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 buf+4(FP), R1 // arg 2 - buf
MOVW nbyte+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 - pid, already in R0
MOVW sig+0(FP), R1 // arg 2 - signum
MOVW $37, R12 // sys_kill
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 $37, R12 // sys_kill
SWI $0
RET
TEXT runtime·mmap(SB),NOSPLIT,$16
MOVW addr+0(FP), R0 // arg 1 - addr
MOVW len+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 offset+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 len+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 len+4(FP), R1 // arg 2 - len
MOVW behav+8(FP), R2 // arg 2 - behav
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 which+0(FP), R0 // arg 1 - which
MOVW value+4(FP), R1 // arg 2 - value
MOVW ovalue+8(FP), R2 // arg 3 - ovalue
MOVW $69, R12 // sys_setitimer
SWI $0
RET
// func now() (sec int64, nsec int32)
TEXT time·now(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 signum+0(FP), R0 // arg 1 - signum
MOVW nsa+4(FP), R1 // arg 2 - nsa
MOVW osa+8(FP), R2 // arg 3 - osa
MOVW $46, R12 // sys_sigaction
SWI $0
MOVW.CS $3, R8 // crash on syscall failure
MOVW.CS R8, (R8)
RET
TEXT runtime·sigprocmask(SB),NOSPLIT,$0
MOVW how+0(FP), R0 // arg 1 - how
MOVW mask+4(FP), R1 // arg 2 - mask
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·sigtramp(SB),NOSPLIT,$24
// 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)
CMP $0, g
BNE 4(PC)
// Signal number saved in 4(R13).
MOVW runtime·badsignal(SB), R11
BL (R11)
RET
// Save g.
MOVW g, R3
MOVW g, 20(R13)
// g = m->signal
MOVW g_m(g), R8
MOVW m_gsignal(R8), g
// R0 already saved.
MOVW R1, 8(R13) // info
MOVW R2, 12(R13) // context
MOVW R3, 16(R13) // gp (original g)
BL runtime·sighandler(SB)
// Restore g.
MOVW 20(R13), g
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 nss+0(FP), R0 // arg 1 - nss
MOVW oss+4(FP), R1 // arg 2 - oss
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 tp+8(FP), R2 // arg 3 - tp
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 name+0(FP), R0 // arg 1 - name
MOVW namelen+4(FP), R1 // arg 2 - namelen
MOVW oldp+8(FP), R2 // arg 3 - oldp
MOVW oldlenp+12(FP), R3 // arg 4 - oldlenp
MOVW newp+16(FP), R4 // arg 5 - newp (on stack)
MOVW R4, 4(R13)
MOVW newlen+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 fd+0(FP), R0 // arg 1 - fd
MOVW changelist+4(FP), R1 // arg 2 - changelist
MOVW nchanges+8(FP), R2 // arg 3 - nchanges
MOVW eventlist+12(FP), R3 // arg 4 - eventlist
MOVW nevents+16(FP), R4 // arg 5 - nevents (on stack)
MOVW R4, 4(R13)
MOVW timeout+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
// int32 runtime·closeonexec(int32 fd);
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
RSB.CS $0, R0
MOVW R0, ret+4(FP)
RET
TEXT runtime·casp1(SB),NOSPLIT,$0
//B runtime·armcas(SB)
B runtime·cas(SB)
TEXT runtime·cas(SB),NOSPLIT,$0
B runtime·armcas(SB)
TEXT ·publicationBarrier(SB),NOSPLIT,$-4-0
B runtime·armPublicationBarrier(SB)
// TODO(jsing): Implement.
TEXT runtime·read_tls_fallback(SB),NOSPLIT,$-4
MOVW $5, R0
MOVW R0, (R0)
RET
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