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// Copyright 2012 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, FreeBSD
// /usr/src/sys/kern/syscalls.master for syscall numbers.
//
#include "zasm_GOOS_GOARCH.h"
TEXT runtime·sys_umtx_op(SB),7,$0
MOVW 0(FP), R0
MOVW 4(FP), R1
MOVW 8(FP), R2
MOVW 12(FP), R3
ADD $20, R13 // arg 5 is passed on stack
SWI $454
SUB $20, R13
// BCS error
RET
TEXT runtime·thr_new(SB),7,$0
MOVW 0(FP), R0
MOVW 4(FP), R1
SWI $455
RET
TEXT runtime·thr_start(SB),7,$0
MOVW R0, R9 // m
// TODO(minux): set up TLS?
// set up g
MOVW m_g0(R9), R10
BL runtime·emptyfunc(SB) // fault if stack check is wrong
BL runtime·mstart(SB)
MOVW $2, R9 // crash (not reached)
MOVW R9, (R9)
RET
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),7,$-8
MOVW 0(FP), R0 // arg 1 exit status
SWI $1
MOVW.CS $0, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·exit1(SB),7,$-8
MOVW 0(FP), R0 // arg 1 exit status
SWI $431
MOVW.CS $0, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·open(SB),7,$-8
MOVW 0(FP), R0 // arg 1 name
MOVW 4(FP), R1 // arg 2 mode
MOVW 8(FP), R2 // arg 3 perm
SWI $5
RET
TEXT runtime·read(SB),7,$-8
MOVW 0(FP), R0 // arg 1 fd
MOVW 4(FP), R1 // arg 2 buf
MOVW 8(FP), R2 // arg 3 count
SWI $3
RET
TEXT runtime·write(SB),7,$-8
MOVW 0(FP), R0 // arg 1 fd
MOVW 4(FP), R1 // arg 2 buf
MOVW 8(FP), R2 // arg 3 count
SWI $4
RET
TEXT runtime·close(SB),7,$-8
MOVW 0(FP), R0 // arg 1 fd
SWI $6
RET
TEXT runtime·getrlimit(SB),7,$-8
MOVW 0(FP), R0
MOVW 4(FP), R1
MOVW 8(FP), R2
SWI $194
RET
TEXT runtime·raise(SB),7,$8
// thr_self(&4(R13))
MOVW $4(R13), R0 // arg 1 &4(R13)
SWI $432
// thr_kill(self, SIGPIPE)
MOVW 4(R13), R0 // arg 1 id
MOVW sig+0(FP), R1 // arg 2 - signal
SWI $433
RET
TEXT runtime·setitimer(SB), 7, $-8
MOVW 0(FP), R0
MOVW 4(FP), R1
MOVW 8(FP), R2
SWI $83
RET
// func now() (sec int64, nsec int32)
TEXT time·now(SB), 7, $32
MOVW $0, R0 // CLOCK_REALTIME
MOVW $8(R13), R1
SWI $232 // clock_gettime
MOVW 8(R13), R0 // sec.low
MOVW 12(R13), R1 // sec.high
MOVW 16(R13), R2 // nsec
MOVW R0, 0(FP)
MOVW R1, 4(FP)
MOVW R2, 8(FP)
RET
// int64 nanotime(void) so really
// void nanotime(int64 *nsec)
TEXT runtime·nanotime(SB), 7, $32
MOVW $0, R0 // CLOCK_REALTIME
MOVW $8(R13), R1
SWI $232 // clock_gettime
MOVW 8(R13), R0 // sec.low
MOVW 12(R13), R4 // sec.high
MOVW 16(R13), R2 // nsec
MOVW $1000000000, R3
MULLU R0, R3, (R1, R0)
MUL R3, R4
ADD.S R2, R0
ADC R4, R1
MOVW 0(FP), R3
MOVW R0, 0(R3)
MOVW R1, 4(R3)
RET
TEXT runtime·sigaction(SB),7,$-8
MOVW 0(FP), R0 // arg 1 sig
MOVW 4(FP), R1 // arg 2 act
MOVW 8(FP), R2 // arg 3 oact
SWI $416
MOVW.CS $0, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·sigtramp(SB),7,$24
// this might be called in external code context,
// where g and m are not set.
// first save R0, because _cgo_load_gm will clobber it
// TODO(adonovan): call runtime·badsignal if m=0, like other platforms?
MOVW R0, 4(R13) // signum
MOVW _cgo_load_gm(SB), R0
CMP $0, R0
BL.NE (R0)
// save g
MOVW R10, R4
MOVW R10, 20(R13)
// g = m->signal
MOVW m_gsignal(R9), R10
// R0 is already saved
MOVW R1, 8(R13) // info
MOVW R2, 12(R13) // context
MOVW R4, 16(R13) // oldg
BL runtime·sighandler(SB)
// restore g
MOVW 20(R13), R10
RET
TEXT runtime·mmap(SB),7,$12
MOVW 0(FP), R0 // arg 1 addr
MOVW 4(FP), R1 // arg 2 len
MOVW 8(FP), R2 // arg 3 prot
MOVW 12(FP), R3 // arg 4 flags
// arg 5 (fid) and arg6 (offset_lo, offset_hi) are passed on stack
// note the C runtime only passes the 32-bit offset_lo to us
MOVW 16(FP), R4 // arg 5
MOVW R4, 4(R13)
MOVW 20(FP), R5 // arg 6 lower 32-bit
MOVW R5, 8(R13)
MOVW $0, R6 // higher 32-bit for arg 6
MOVW R6, 12(R13)
ADD $4, R13 // pass arg 5 and arg 6 on stack
SWI $477
SUB $4, R13
RET
TEXT runtime·munmap(SB),7,$0
MOVW 0(FP), R0 // arg 1 addr
MOVW 4(FP), R1 // arg 2 len
SWI $73
MOVW.CS $0, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·madvise(SB),7,$0
MOVW 0(FP), R0 // arg 1 addr
MOVW 4(FP), R1 // arg 2 len
MOVW 8(FP), R2 // arg 3 flags
SWI $75
// ignore failure - maybe pages are locked
RET
TEXT runtime·sigaltstack(SB),7,$-8
MOVW new+0(FP), R0
MOVW old+4(FP), R1
SWI $53
MOVW.CS $0, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·usleep(SB),7,$16
MOVW usec+0(FP), R0
MOVW R0, R2
MOVW $1000000, R1
DIV R1, R0
// 0(R13) is the saved LR, don't use it
MOVW R0, 4(R13) // tv_sec.low
MOVW $0, R0
MOVW R0, 8(R13) // tv_sec.high
MOD R1, R2
MOVW $1000, R1
MUL R1, R2
MOVW R2, 12(R13) // tv_nsec
MOVW $4(R13), R0 // arg 1 - rqtp
MOVW $0, R1 // arg 2 - rmtp
SWI $240 // sys_nanosleep
RET
TEXT runtime·sysctl(SB),7,$0
MOVW 0(FP), R0 // arg 1 - name
MOVW 4(FP), R1 // arg 2 - namelen
MOVW 8(FP), R2 // arg 3 - oldp
MOVW 12(FP), R3 // arg 4 - oldlenp
// arg 5 (newp) and arg 6 (newlen) are passed on stack
ADD $20, R13
SWI $202 // sys___sysctl
SUB.CS $0, R0, R0
SUB $20, R13
RET
TEXT runtime·osyield(SB),7,$-4
SWI $331 // sys_sched_yield
RET
TEXT runtime·sigprocmask(SB),7,$0
MOVW $3, R0 // arg 1 - how (SIG_SETMASK)
MOVW 0(FP), R1 // arg 2 - set
MOVW 4(FP), R2 // arg 3 - oset
SWI $340 // sys_sigprocmask
MOVW.CS $0, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·casp(SB),7,$0
B runtime·cas(SB)
// TODO(minux): this is only valid for ARMv6+
// bool armcas(int32 *val, int32 old, int32 new)
// Atomically:
// if(*val == old){
// *val = new;
// return 1;
// }else
// return 0;
TEXT runtime·cas(SB),7,$0
B runtime·armcas(SB)
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