mirror of
https://github.com/golang/go
synced 2024-10-02 04:18:33 -06:00
dfbf568c9f
This replaces frame size -4/-8 with the NOFRAME flag in mips and mips64 assembly. This was automated with: sed -i -e 's/\(^TEXT.*[A-Z]\),\( *\)\$-[84]/\1|NOFRAME,\2$0/' $(find -name '*_mips*.s') Plus a manual fix to mkduff.go. The go binary is identical on both architectures before and after this change. Change-Id: I0310384d1a584118c41d1cd3a042bb8ea7227efb Reviewed-on: https://go-review.googlesource.com/92044 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
491 lines
9.4 KiB
ArmAsm
491 lines
9.4 KiB
ArmAsm
// Copyright 2016 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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// +build linux
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// +build mips mipsle
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//
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// System calls and other sys.stuff for mips, Linux
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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 SYS_exit 4001
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#define SYS_read 4003
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#define SYS_write 4004
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#define SYS_open 4005
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#define SYS_close 4006
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#define SYS_getpid 4020
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#define SYS_kill 4037
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#define SYS_fcntl 4055
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#define SYS_gettimeofday 4078
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#define SYS_mmap 4090
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#define SYS_munmap 4091
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#define SYS_setitimer 4104
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#define SYS_clone 4120
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#define SYS_newselect 4142
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#define SYS_sched_yield 4162
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#define SYS_rt_sigreturn 4193
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#define SYS_rt_sigaction 4194
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#define SYS_rt_sigprocmask 4195
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#define SYS_sigaltstack 4206
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#define SYS_getrlimit 4076
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#define SYS_madvise 4218
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#define SYS_mincore 4217
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#define SYS_gettid 4222
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#define SYS_tkill 4236
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#define SYS_futex 4238
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#define SYS_sched_getaffinity 4240
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#define SYS_exit_group 4246
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#define SYS_epoll_create 4248
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#define SYS_epoll_ctl 4249
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#define SYS_epoll_wait 4250
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#define SYS_clock_gettime 4263
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#define SYS_epoll_create1 4326
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#define SYS_brk 4045
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TEXT runtime·exit(SB),NOSPLIT,$0-4
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MOVW code+0(FP), R4
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MOVW $SYS_exit_group, R2
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SYSCALL
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UNDEF
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RET
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// func exitThread(wait *uint32)
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TEXT runtime·exitThread(SB),NOSPLIT,$0-4
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MOVW wait+0(FP), R1
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// We're done using the stack.
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MOVW $0, R2
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SYNC
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MOVW R2, (R1)
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SYNC
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MOVW $0, R4 // exit code
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MOVW $SYS_exit, R2
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SYSCALL
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UNDEF
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JMP 0(PC)
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TEXT runtime·open(SB),NOSPLIT,$0-16
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MOVW name+0(FP), R4
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MOVW mode+4(FP), R5
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MOVW perm+8(FP), R6
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MOVW $SYS_open, R2
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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+12(FP)
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RET
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TEXT runtime·closefd(SB),NOSPLIT,$0-8
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MOVW fd+0(FP), R4
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MOVW $SYS_close, R2
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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+4(FP)
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RET
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TEXT runtime·write(SB),NOSPLIT,$0-16
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MOVW fd+0(FP), R4
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MOVW p+4(FP), R5
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MOVW n+8(FP), R6
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MOVW $SYS_write, R2
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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+12(FP)
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RET
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TEXT runtime·read(SB),NOSPLIT,$0-16
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MOVW fd+0(FP), R4
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MOVW p+4(FP), R5
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MOVW n+8(FP), R6
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MOVW $SYS_read, R2
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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+12(FP)
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RET
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TEXT runtime·getrlimit(SB),NOSPLIT,$0-12
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MOVW kind+0(FP), R4
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MOVW limit+4(FP), R5
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MOVW $SYS_getrlimit, R2
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SYSCALL
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MOVW R2, ret+8(FP)
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RET
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TEXT runtime·usleep(SB),NOSPLIT,$28-4
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MOVW usec+0(FP), R3
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MOVW R3, R5
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MOVW $1000000, R4
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DIVU R4, R3
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MOVW LO, R3
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MOVW R3, 24(R29)
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MULU R3, R4
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MOVW LO, R4
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SUBU R4, R5
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MOVW R5, 28(R29)
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// select(0, 0, 0, 0, &tv)
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MOVW $0, R4
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MOVW $0, R5
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MOVW $0, R6
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MOVW $0, R7
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ADDU $24, R29, R8
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MOVW R8, 16(R29)
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MOVW $SYS_newselect, R2
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SYSCALL
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RET
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TEXT runtime·gettid(SB),NOSPLIT,$0-4
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MOVW $SYS_gettid, R2
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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·raise(SB),NOSPLIT,$0-4
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MOVW $SYS_gettid, R2
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SYSCALL
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MOVW R2, R4 // arg 1 tid
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MOVW sig+0(FP), R5 // arg 2
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MOVW $SYS_tkill, R2
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SYSCALL
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RET
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TEXT runtime·raiseproc(SB),NOSPLIT,$0
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MOVW $SYS_getpid, R2
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SYSCALL
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MOVW R2, R4 // arg 1 pid
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MOVW sig+0(FP), R5 // arg 2
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MOVW $SYS_kill, R2
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SYSCALL
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RET
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TEXT runtime·setitimer(SB),NOSPLIT,$0-12
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MOVW mode+0(FP), R4
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MOVW new+4(FP), R5
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MOVW old+8(FP), R6
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MOVW $SYS_setitimer, R2
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SYSCALL
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RET
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TEXT runtime·mincore(SB),NOSPLIT,$0-16
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MOVW addr+0(FP), R4
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MOVW n+4(FP), R5
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MOVW dst+8(FP), R6
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MOVW $SYS_mincore, R2
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SYSCALL
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SUBU R2, R0, R2 // caller expects negative errno
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MOVW R2, ret+12(FP)
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RET
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// func walltime() (sec int64, nsec int32)
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TEXT runtime·walltime(SB),NOSPLIT,$8-12
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MOVW $0, R4 // CLOCK_REALTIME
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MOVW $4(R29), R5
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MOVW $SYS_clock_gettime, R2
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SYSCALL
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MOVW 4(R29), R3 // sec
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MOVW 8(R29), R5 // nsec
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#ifdef GOARCH_mips
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MOVW R3, sec_lo+4(FP)
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MOVW R0, sec_hi+0(FP)
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#else
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MOVW R3, sec_lo+0(FP)
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MOVW R0, sec_hi+4(FP)
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#endif
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MOVW R5, nsec+8(FP)
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RET
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TEXT runtime·nanotime(SB),NOSPLIT,$8-8
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MOVW $1, R4 // CLOCK_MONOTONIC
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MOVW $4(R29), R5
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MOVW $SYS_clock_gettime, R2
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SYSCALL
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MOVW 4(R29), R3 // sec
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MOVW 8(R29), R5 // nsec
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// sec is in R3, nsec in R5
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// return nsec in R3
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MOVW $1000000000, R4
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MULU R4, R3
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MOVW LO, R3
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ADDU R5, R3
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SGTU R5, R3, R4
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#ifdef GOARCH_mips
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MOVW R3, ret_lo+4(FP)
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#else
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MOVW R3, ret_lo+0(FP)
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#endif
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MOVW HI, R3
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ADDU R4, R3
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#ifdef GOARCH_mips
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MOVW R3, ret_hi+0(FP)
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#else
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MOVW R3, ret_hi+4(FP)
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#endif
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RET
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TEXT runtime·rtsigprocmask(SB),NOSPLIT,$0-16
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MOVW how+0(FP), R4
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MOVW new+4(FP), R5
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MOVW old+8(FP), R6
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MOVW size+12(FP), R7
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MOVW $SYS_rt_sigprocmask, R2
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SYSCALL
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BEQ R7, 2(PC)
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UNDEF // crash
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RET
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TEXT runtime·rt_sigaction(SB),NOSPLIT,$0-20
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MOVW sig+0(FP), R4
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MOVW new+4(FP), R5
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MOVW old+8(FP), R6
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MOVW size+12(FP), R7
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MOVW $SYS_rt_sigaction, R2
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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·sigfwd(SB),NOSPLIT,$0-16
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MOVW sig+4(FP), R4
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MOVW info+8(FP), R5
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MOVW ctx+12(FP), R6
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MOVW fn+0(FP), R25
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MOVW R29, R22
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SUBU $16, R29
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AND $~7, R29 // shadow space for 4 args aligned to 8 bytes as per O32 ABI
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JAL (R25)
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MOVW R22, R29
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RET
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TEXT runtime·sigtramp(SB),NOSPLIT,$12
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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, 4(R29)
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MOVW R5, 8(R29)
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MOVW R6, 12(R29)
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MOVW $runtime·sigtrampgo(SB), R1
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JAL (R1)
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RET
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TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0
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JMP runtime·sigtramp(SB)
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TEXT runtime·mmap(SB),NOSPLIT,$20-32
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MOVW addr+0(FP), R4
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MOVW n+4(FP), R5
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MOVW prot+8(FP), R6
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MOVW flags+12(FP), R7
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MOVW fd+16(FP), R8
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MOVW off+20(FP), R9
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MOVW R8, 16(R29)
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MOVW R9, 20(R29)
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MOVW $SYS_mmap, R2
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SYSCALL
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BEQ R7, ok
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MOVW $0, p+24(FP)
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MOVW R2, err+28(FP)
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RET
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ok:
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MOVW R2, p+24(FP)
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MOVW $0, err+28(FP)
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RET
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TEXT runtime·munmap(SB),NOSPLIT,$0-8
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MOVW addr+0(FP), R4
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MOVW n+4(FP), R5
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MOVW $SYS_munmap, R2
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SYSCALL
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BEQ R7, 2(PC)
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UNDEF // crash
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RET
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TEXT runtime·madvise(SB),NOSPLIT,$0-12
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MOVW addr+0(FP), R4
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MOVW n+4(FP), R5
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MOVW flags+8(FP), R6
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MOVW $SYS_madvise, R2
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SYSCALL
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// ignore failure - maybe pages are locked
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RET
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// int32 futex(int32 *uaddr, int32 op, int32 val, struct timespec *timeout, int32 *uaddr2, int32 val2);
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TEXT runtime·futex(SB),NOSPLIT,$20-28
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MOVW addr+0(FP), R4
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MOVW op+4(FP), R5
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MOVW val+8(FP), R6
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MOVW ts+12(FP), R7
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MOVW addr2+16(FP), R8
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MOVW val3+20(FP), R9
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MOVW R8, 16(R29)
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MOVW R9, 20(R29)
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MOVW $SYS_futex, R2
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SYSCALL
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MOVW R2, ret+24(FP)
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RET
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// int32 clone(int32 flags, void *stk, M *mp, G *gp, void (*fn)(void));
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TEXT runtime·clone(SB),NOSPLIT|NOFRAME,$0-24
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MOVW flags+0(FP), R4
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MOVW stk+4(FP), R5
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MOVW R0, R6 // ptid
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MOVW R0, R7 // tls
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// O32 syscall handler unconditionally copies arguments 5-8 from stack,
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// even for syscalls with less than 8 arguments. Reserve 32 bytes of new
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// stack so that any syscall invoked immediately in the new thread won't fail.
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ADD $-32, R5
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// Copy mp, gp, fn off parent stack for use by child.
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MOVW mp+8(FP), R16
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MOVW gp+12(FP), R17
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MOVW fn+16(FP), R18
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MOVW $1234, R1
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MOVW R16, 0(R5)
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MOVW R17, 4(R5)
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MOVW R18, 8(R5)
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MOVW R1, 12(R5)
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MOVW $SYS_clone, R2
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SYSCALL
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// In parent, return.
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BEQ R2, 5(PC)
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SUBU R2, R0, R3
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CMOVN R7, R3, R2
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MOVW R2, ret+20(FP)
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RET
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// In child, on new stack.
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// Check that SP is as we expect
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MOVW 12(R29), R16
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MOVW $1234, R1
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BEQ R16, R1, 2(PC)
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MOVW (R0), R0
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// Initialize m->procid to Linux tid
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MOVW $SYS_gettid, R2
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SYSCALL
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MOVW 0(R29), R16 // m
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MOVW 4(R29), R17 // g
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MOVW 8(R29), R18 // fn
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BEQ R16, nog
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BEQ R17, nog
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MOVW R2, m_procid(R16)
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// In child, set up new stack
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MOVW R16, g_m(R17)
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MOVW R17, g
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// TODO(mips32): doesn't have runtime·stackcheck(SB)
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nog:
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// Call fn
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ADDU $32, R29
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JAL (R18)
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// It shouldn't return. If it does, exit that thread.
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ADDU $-32, R29
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MOVW $0xf4, R4
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MOVW $SYS_exit, R2
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SYSCALL
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UNDEF
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TEXT runtime·sigaltstack(SB),NOSPLIT,$0
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MOVW new+0(FP), R4
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MOVW old+4(FP), R5
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MOVW $SYS_sigaltstack, R2
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SYSCALL
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BEQ R7, 2(PC)
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UNDEF // crash
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RET
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TEXT runtime·osyield(SB),NOSPLIT,$0
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MOVW $SYS_sched_yield, R2
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SYSCALL
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RET
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TEXT runtime·sched_getaffinity(SB),NOSPLIT,$0-16
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MOVW pid+0(FP), R4
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MOVW len+4(FP), R5
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MOVW buf+8(FP), R6
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MOVW $SYS_sched_getaffinity, R2
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SYSCALL
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MOVW R2, ret+12(FP)
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RET
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// int32 runtime·epollcreate(int32 size);
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TEXT runtime·epollcreate(SB),NOSPLIT,$0-8
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MOVW size+0(FP), R4
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MOVW $SYS_epoll_create, R2
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SYSCALL
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MOVW R2, ret+4(FP)
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RET
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// int32 runtime·epollcreate1(int32 flags);
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TEXT runtime·epollcreate1(SB),NOSPLIT,$0-8
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MOVW flags+0(FP), R4
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MOVW $SYS_epoll_create1, R2
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SYSCALL
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MOVW R2, ret+4(FP)
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RET
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// func epollctl(epfd, op, fd int32, ev *epollEvent) int
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TEXT runtime·epollctl(SB),NOSPLIT,$0-20
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MOVW epfd+0(FP), R4
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MOVW op+4(FP), R5
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MOVW fd+8(FP), R6
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MOVW ev+12(FP), R7
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MOVW $SYS_epoll_ctl, R2
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SYSCALL
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MOVW R2, ret+16(FP)
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RET
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// int32 runtime·epollwait(int32 epfd, EpollEvent *ev, int32 nev, int32 timeout);
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TEXT runtime·epollwait(SB),NOSPLIT,$0-20
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MOVW epfd+0(FP), R4
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MOVW ev+4(FP), R5
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MOVW nev+8(FP), R6
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MOVW timeout+12(FP), R7
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MOVW $SYS_epoll_wait, R2
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SYSCALL
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MOVW R2, ret+16(FP)
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RET
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// void runtime·closeonexec(int32 fd);
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TEXT runtime·closeonexec(SB),NOSPLIT,$0-4
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MOVW fd+0(FP), R4 // fd
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MOVW $2, R5 // F_SETFD
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MOVW $1, R6 // FD_CLOEXEC
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MOVW $SYS_fcntl, R2
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SYSCALL
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RET
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// func sbrk0() uintptr
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TEXT runtime·sbrk0(SB),NOSPLIT,$0-4
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// Implemented as brk(NULL).
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MOVW $0, R4
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MOVW $SYS_brk, R2
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SYSCALL
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MOVW R2, ret+0(FP)
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RET
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