mirror of https://go.googlesource.com/go
449 lines
8.9 KiB
ArmAsm
449 lines
8.9 KiB
ArmAsm
// Copyright 2022 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 riscv64, FreeBSD
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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 4
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#define SYS_exit 1
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#define SYS_read 3
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#define SYS_write 4
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#define SYS_open 5
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#define SYS_close 6
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#define SYS_getpid 20
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#define SYS_kill 37
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#define SYS_sigaltstack 53
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#define SYS_munmap 73
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#define SYS_madvise 75
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#define SYS_setitimer 83
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#define SYS_fcntl 92
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#define SYS___sysctl 202
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#define SYS_nanosleep 240
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#define SYS_issetugid 253
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#define SYS_clock_gettime 232
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#define SYS_sched_yield 331
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#define SYS_sigprocmask 340
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#define SYS_kqueue 362
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#define SYS_sigaction 416
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#define SYS_thr_exit 431
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#define SYS_thr_self 432
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#define SYS_thr_kill 433
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#define SYS__umtx_op 454
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#define SYS_thr_new 455
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#define SYS_mmap 477
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#define SYS_cpuset_getaffinity 487
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#define SYS_pipe2 542
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#define SYS_kevent 560
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TEXT emptyfunc<>(SB),0,$0-0
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RET
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// func sys_umtx_op(addr *uint32, mode int32, val uint32, uaddr1 uintptr, ut *umtx_time) int32
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TEXT runtime·sys_umtx_op(SB),NOSPLIT,$0
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MOV addr+0(FP), A0
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MOVW mode+8(FP), A1
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MOVW val+12(FP), A2
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MOV uaddr1+16(FP), A3
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MOV ut+24(FP), A4
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MOV $SYS__umtx_op, T0
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ECALL
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BEQ T0, ZERO, ok
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NEG A0, A0
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ok:
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MOVW A0, ret+32(FP)
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RET
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// func thr_new(param *thrparam, size int32) int32
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TEXT runtime·thr_new(SB),NOSPLIT,$0
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MOV param+0(FP), A0
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MOVW size+8(FP), A1
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MOV $SYS_thr_new, T0
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ECALL
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BEQ T0, ZERO, ok
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NEG A0, A0
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ok:
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MOVW A0, ret+16(FP)
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RET
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// func thr_start()
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TEXT runtime·thr_start(SB),NOSPLIT,$0
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// set up g
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MOV m_g0(A0), g
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MOV A0, g_m(g)
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CALL emptyfunc<>(SB) // fault if stack check is wrong
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CALL runtime·mstart(SB)
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WORD $0 // crash
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RET
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// func exit(code int32)
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TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0-4
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MOVW code+0(FP), A0
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MOV $SYS_exit, T0
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ECALL
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WORD $0 // crash
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// func exitThread(wait *atomic.Uint32)
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TEXT runtime·exitThread(SB),NOSPLIT|NOFRAME,$0-8
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MOV wait+0(FP), A0
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// We're done using the stack.
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FENCE
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MOVW ZERO, (A0)
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FENCE
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MOV $0, A0 // exit code
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MOV $SYS_thr_exit, T0
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ECALL
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JMP 0(PC)
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// func open(name *byte, mode, perm int32) int32
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TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0-20
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MOV name+0(FP), A0
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MOVW mode+8(FP), A1
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MOVW perm+12(FP), A2
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MOV $SYS_open, T0
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ECALL
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BEQ T0, ZERO, ok
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MOV $-1, A0
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ok:
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MOVW A0, ret+16(FP)
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RET
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// func closefd(fd int32) int32
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TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0-12
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MOVW fd+0(FP), A0
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MOV $SYS_close, T0
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ECALL
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BEQ T0, ZERO, ok
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MOV $-1, A0
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ok:
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MOVW A0, ret+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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MOV $r+8(FP), A0
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MOVW flags+0(FP), A1
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MOV $SYS_pipe2, T0
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ECALL
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BEQ T0, ZERO, ok
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NEG A0, A0
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ok:
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MOVW A0, errno+16(FP)
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RET
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// func write1(fd uintptr, p unsafe.Pointer, n int32) int32
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TEXT runtime·write1(SB),NOSPLIT|NOFRAME,$0-28
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MOV fd+0(FP), A0
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MOV p+8(FP), A1
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MOVW n+16(FP), A2
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MOV $SYS_write, T0
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ECALL
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BEQ T0, ZERO, ok
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NEG A0, A0
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ok:
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MOVW A0, ret+24(FP)
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RET
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// func read(fd int32, p unsafe.Pointer, n int32) int32
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TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0-28
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MOVW fd+0(FP), A0
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MOV p+8(FP), A1
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MOVW n+16(FP), A2
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MOV $SYS_read, T0
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ECALL
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BEQ T0, ZERO, ok
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NEG A0, A0
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ok:
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MOVW A0, ret+24(FP)
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RET
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// func usleep(usec uint32)
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TEXT runtime·usleep(SB),NOSPLIT,$24-4
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MOVWU usec+0(FP), A0
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MOV $1000, A1
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MUL A1, A0, A0
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MOV $1000000000, A1
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DIV A1, A0, A2
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MOV A2, 8(X2)
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REM A1, A0, A3
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MOV A3, 16(X2)
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ADD $8, X2, A0
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MOV ZERO, A1
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MOV $SYS_nanosleep, T0
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ECALL
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RET
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// func thr_self() thread
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TEXT runtime·thr_self(SB),NOSPLIT,$8-8
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MOV $ptr-8(SP), A0 // arg 1 &8(SP)
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MOV $SYS_thr_self, T0
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ECALL
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MOV ptr-8(SP), A0
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MOV A0, ret+0(FP)
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RET
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// func thr_kill(t thread, sig int)
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TEXT runtime·thr_kill(SB),NOSPLIT,$0-16
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MOV tid+0(FP), A0 // arg 1 pid
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MOV sig+8(FP), A1 // arg 2 sig
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MOV $SYS_thr_kill, T0
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ECALL
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RET
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// func raiseproc(sig uint32)
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TEXT runtime·raiseproc(SB),NOSPLIT|NOFRAME,$0
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MOV $SYS_getpid, T0
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ECALL
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// arg 1 pid - already in A0
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MOVW sig+0(FP), A1 // arg 2
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MOV $SYS_kill, T0
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ECALL
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RET
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// func setitimer(mode int32, new, old *itimerval)
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TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0-24
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MOVW mode+0(FP), A0
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MOV new+8(FP), A1
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MOV old+16(FP), A2
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MOV $SYS_setitimer, T0
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ECALL
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RET
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// func fallback_walltime() (sec int64, nsec int32)
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TEXT runtime·fallback_walltime(SB),NOSPLIT,$24-12
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MOV $CLOCK_REALTIME, A0
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MOV $8(X2), A1
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MOV $SYS_clock_gettime, T0
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ECALL
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MOV 8(X2), T0 // sec
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MOVW 16(X2), T1 // nsec
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MOV T0, sec+0(FP)
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MOVW T1, nsec+8(FP)
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RET
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// func fallback_nanotime() int64
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TEXT runtime·fallback_nanotime(SB),NOSPLIT,$24-8
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MOV $CLOCK_MONOTONIC, A0
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MOV $8(X2), A1
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MOV $SYS_clock_gettime, T0
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ECALL
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MOV 8(X2), T0 // sec
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MOV 16(X2), T1 // nsec
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// sec is in T0, nsec in T1
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// return nsec in T0
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MOV $1000000000, T2
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MUL T2, T0
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ADD T1, T0
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MOV T0, ret+0(FP)
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RET
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// func asmSigaction(sig uintptr, new, old *sigactiont) int32
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TEXT runtime·asmSigaction(SB),NOSPLIT|NOFRAME,$0
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MOV sig+0(FP), A0 // arg 1 sig
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MOV new+8(FP), A1 // arg 2 act
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MOV old+16(FP), A2 // arg 3 oact
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MOV $SYS_sigaction, T0
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ECALL
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BEQ T0, ZERO, ok
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MOV $-1, A0
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ok:
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MOVW A0, ret+24(FP)
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RET
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// func sigfwd(fn uintptr, sig uint32, info *siginfo, ctx unsafe.Pointer)
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TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
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MOVW sig+8(FP), A0
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MOV info+16(FP), A1
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MOV ctx+24(FP), A2
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MOV fn+0(FP), T1
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JALR RA, T1
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RET
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// func sigtramp(signo, ureg, ctxt unsafe.Pointer)
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TEXT runtime·sigtramp(SB),NOSPLIT,$64
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MOVW A0, 8(X2)
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MOV A1, 16(X2)
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MOV A2, 24(X2)
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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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MOVBU runtime·iscgo(SB), A0
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BEQ A0, ZERO, ok
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CALL runtime·load_g(SB)
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ok:
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MOV $runtime·sigtrampgo(SB), A0
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JALR RA, A0
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RET
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// func mmap(addr uintptr, n uintptr, prot int, flags int, fd int, off int64) (ret uintptr, err error)
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TEXT runtime·mmap(SB),NOSPLIT|NOFRAME,$0
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MOV addr+0(FP), A0
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MOV n+8(FP), A1
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MOVW prot+16(FP), A2
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MOVW flags+20(FP), A3
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MOVW fd+24(FP), A4
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MOVW off+28(FP), A5
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MOV $SYS_mmap, T0
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ECALL
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BNE T0, ZERO, fail
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MOV A0, p+32(FP)
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MOV ZERO, err+40(FP)
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RET
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fail:
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MOV ZERO, p+32(FP)
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MOV A0, err+40(FP)
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RET
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// func munmap(addr uintptr, n uintptr) (err error)
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TEXT runtime·munmap(SB),NOSPLIT|NOFRAME,$0
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MOV addr+0(FP), A0
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MOV n+8(FP), A1
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MOV $SYS_munmap, T0
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ECALL
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BNE T0, ZERO, fail
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RET
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fail:
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WORD $0 // crash
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// func madvise(addr unsafe.Pointer, n uintptr, flags int32) int32
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TEXT runtime·madvise(SB),NOSPLIT|NOFRAME,$0
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MOV addr+0(FP), A0
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MOV n+8(FP), A1
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MOVW flags+16(FP), A2
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MOV $SYS_madvise, T0
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ECALL
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BEQ T0, ZERO, ok
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MOV $-1, A0
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ok:
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MOVW A0, ret+24(FP)
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RET
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// func sysctl(mib *uint32, miblen uint32, out *byte, size *uintptr, dst *byte, ndst uintptr) int32
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TEXT runtime·sysctl(SB),NOSPLIT,$0
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MOV mib+0(FP), A0
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MOV miblen+8(FP), A1
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MOV out+16(FP), A2
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MOV size+24(FP), A3
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MOV dst+32(FP), A4
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MOV ndst+40(FP), A5
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MOV $SYS___sysctl, T0
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ECALL
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BEQ T0, ZERO, ok
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NEG A0, A0
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ok:
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MOVW A0, ret+48(FP)
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RET
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// func sigaltstack(new, old *stackt)
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TEXT runtime·sigaltstack(SB),NOSPLIT|NOFRAME,$0
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MOV new+0(FP), A0
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MOV old+8(FP), A1
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MOV $SYS_sigaltstack, T0
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ECALL
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BNE T0, ZERO, fail
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RET
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fail:
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WORD $0 // crash
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// func osyield()
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TEXT runtime·osyield(SB),NOSPLIT|NOFRAME,$0
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MOV $SYS_sched_yield, T0
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ECALL
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RET
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// func sigprocmask(how int32, new, old *sigset)
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TEXT runtime·sigprocmask(SB),NOSPLIT|NOFRAME,$0-24
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MOVW how+0(FP), A0
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MOV new+8(FP), A1
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MOV old+16(FP), A2
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MOV $SYS_sigprocmask, T0
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ECALL
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BNE T0, ZERO, fail
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RET
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fail:
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WORD $0 // crash
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// func cpuset_getaffinity(level int, which int, id int64, size int, mask *byte) int32
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TEXT runtime·cpuset_getaffinity(SB),NOSPLIT|NOFRAME,$0-44
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MOV level+0(FP), A0
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MOV which+8(FP), A1
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MOV id+16(FP), A2
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MOV size+24(FP), A3
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MOV mask+32(FP), A4
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MOV $SYS_cpuset_getaffinity, T0
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ECALL
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BEQ T0, ZERO, ok
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MOV $-1, A0
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ok:
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MOVW A0, ret+40(FP)
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RET
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// func kqueue() int32
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TEXT runtime·kqueue(SB),NOSPLIT|NOFRAME,$0
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MOV $SYS_kqueue, T0
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ECALL
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BEQ T0, ZERO, ok
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MOV $-1, A0
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ok:
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MOVW A0, ret+0(FP)
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RET
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// func kevent(kq int, ch unsafe.Pointer, nch int, ev unsafe.Pointer, nev int, ts *Timespec) (n int, err error)
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TEXT runtime·kevent(SB),NOSPLIT,$0
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MOVW kq+0(FP), A0
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MOV ch+8(FP), A1
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MOVW nch+16(FP), A2
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MOV ev+24(FP), A3
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MOVW nev+32(FP), A4
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MOV ts+40(FP), A5
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MOV $SYS_kevent, T0
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ECALL
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BEQ T0, ZERO, ok
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NEG A0, A0
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ok:
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MOVW A0, ret+48(FP)
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RET
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// func fcntl(fd, cmd, arg int32) (int32, int32)
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TEXT runtime·fcntl(SB),NOSPLIT,$0
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MOVW fd+0(FP), A0
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MOVW cmd+4(FP), A1
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MOVW arg+8(FP), A2
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MOV $SYS_fcntl, T0
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ECALL
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BEQ T0, ZERO, noerr
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MOV $-1, A1
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MOVW A1, ret+16(FP)
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MOVW A0, errno+20(FP)
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RET
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noerr:
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MOVW A0, ret+16(FP)
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MOVW ZERO, errno+20(FP)
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RET
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// func getCntxct() uint32
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TEXT runtime·getCntxct(SB),NOSPLIT|NOFRAME,$0
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RDTIME A0
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MOVW A0, ret+0(FP)
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RET
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// func issetugid() int32
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TEXT runtime·issetugid(SB),NOSPLIT|NOFRAME,$0
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MOV $SYS_issetugid, T0
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ECALL
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MOVW A0, ret+0(FP)
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RET
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