mirror of https://go.googlesource.com/go
828 lines
18 KiB
ArmAsm
828 lines
18 KiB
ArmAsm
// Copyright 2009 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 ARM, OpenBSD
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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 $3
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// With OpenBSD 6.7 onwards, an armv7 syscall returns two instructions
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// after the SWI instruction, to allow for a speculative execution
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// barrier to be placed after the SWI without impacting performance.
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// For now use hardware no-ops as this works with both older and newer
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// kernels. After OpenBSD 6.8 is released this should be changed to
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// speculation barriers.
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#define NOOP MOVW R0, R0
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#define INVOKE_SYSCALL \
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SWI $0; \
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NOOP; \
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NOOP
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// mstart_stub is the first function executed on a new thread started by pthread_create.
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// It just does some low-level setup and then calls mstart.
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// Note: called with the C calling convention.
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TEXT runtime·mstart_stub(SB),NOSPLIT,$0
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// R0 points to the m.
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// We are already on m's g0 stack.
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// Save callee-save registers.
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MOVM.DB.W [R4-R11], (R13)
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MOVW m_g0(R0), g
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BL runtime·save_g(SB)
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BL runtime·mstart(SB)
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// Restore callee-save registers.
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MOVM.IA.W (R13), [R4-R11]
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// Go is all done with this OS thread.
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// Tell pthread everything is ok (we never join with this thread, so
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// the value here doesn't really matter).
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MOVW $0, R0
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RET
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TEXT runtime·sigfwd(SB),NOSPLIT,$0-16
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MOVW sig+4(FP), R0
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MOVW info+8(FP), R1
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MOVW ctx+12(FP), R2
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MOVW fn+0(FP), R3
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MOVW R13, R9
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SUB $24, R13
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BIC $0x7, R13 // alignment for ELF ABI
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BL (R3)
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MOVW R9, R13
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RET
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TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$0
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// Reserve space for callee-save registers and arguments.
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MOVM.DB.W [R4-R11], (R13)
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SUB $16, R13
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// If called from an external code context, g will not be set.
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// Save R0, since runtime·load_g will clobber it.
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MOVW R0, 4(R13) // signum
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BL runtime·load_g(SB)
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MOVW R1, 8(R13)
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MOVW R2, 12(R13)
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BL runtime·sigtrampgo(SB)
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// Restore callee-save registers.
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ADD $16, R13
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MOVM.IA.W (R13), [R4-R11]
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RET
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TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
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B runtime·armPublicationBarrier(SB)
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// TODO(jsing): OpenBSD only supports GOARM=7 machines... this
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// should not be needed, however the linker still allows GOARM=5
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// on this platform.
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TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0
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MOVM.WP [R1, R2, R3, R12], (R13)
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MOVW $330, R12 // sys___get_tcb
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INVOKE_SYSCALL
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MOVM.IAW (R13), [R1, R2, R3, R12]
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RET
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// These trampolines help convert from Go calling convention to C calling convention.
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// They should be called with asmcgocall - note that while asmcgocall does
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// stack alignment, creation of a frame undoes it again.
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// A pointer to the arguments is passed in R0.
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// A single int32 result is returned in R0.
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// (For more results, make an args/results structure.)
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TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 0(R0), R0 // arg 1 attr
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CALL libc_pthread_attr_init(SB)
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MOVW R9, R13
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RET
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TEXT runtime·pthread_attr_destroy_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 0(R0), R0 // arg 1 attr
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CALL libc_pthread_attr_destroy(SB)
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MOVW R9, R13
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RET
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TEXT runtime·pthread_attr_getstacksize_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 size
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MOVW 0(R0), R0 // arg 1 attr
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CALL libc_pthread_attr_getstacksize(SB)
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MOVW R9, R13
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RET
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TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 state
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MOVW 0(R0), R0 // arg 1 attr
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CALL libc_pthread_attr_setdetachstate(SB)
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MOVW R9, R13
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RET
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TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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SUB $16, R13
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BIC $0x7, R13 // align for ELF ABI
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MOVW 0(R0), R1 // arg 2 attr
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MOVW 4(R0), R2 // arg 3 start
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MOVW 8(R0), R3 // arg 4 arg
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MOVW R13, R0 // arg 1 &threadid (discarded)
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CALL libc_pthread_create(SB)
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MOVW R9, R13
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RET
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TEXT runtime·thrkill_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 - signal
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MOVW $0, R2 // arg 3 - tcb
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MOVW 0(R0), R0 // arg 1 - tid
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CALL libc_thrkill(SB)
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MOVW R9, R13
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RET
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TEXT runtime·thrsleep_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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SUB $16, R13
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 - clock_id
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MOVW 8(R0), R2 // arg 3 - abstime
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MOVW 12(R0), R3 // arg 4 - lock
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MOVW 16(R0), R4 // arg 5 - abort (on stack)
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MOVW R4, 0(R13)
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MOVW 0(R0), R0 // arg 1 - id
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CALL libc_thrsleep(SB)
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MOVW R9, R13
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RET
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TEXT runtime·thrwakeup_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 - count
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MOVW 0(R0), R0 // arg 1 - id
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CALL libc_thrwakeup(SB)
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MOVW R9, R13
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RET
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TEXT runtime·exit_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 0(R0), R0 // arg 1 exit status
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BL libc_exit(SB)
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MOVW $0, R8 // crash on failure
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MOVW R8, (R8)
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MOVW R9, R13
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RET
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TEXT runtime·getthrid_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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MOVW R0, R8
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BIC $0x7, R13 // align for ELF ABI
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BL libc_getthrid(SB)
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MOVW R0, 0(R8)
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MOVW R9, R13
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RET
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TEXT runtime·raiseproc_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW R0, R4
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BL libc_getpid(SB) // arg 1 pid
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MOVW R4, R1 // arg 2 signal
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BL libc_kill(SB)
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MOVW R9, R13
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RET
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TEXT runtime·sched_yield_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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BL libc_sched_yield(SB)
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MOVW R9, R13
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RET
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TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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SUB $16, R13
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BIC $0x7, R13 // align for ELF ABI
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MOVW R0, R8
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MOVW 4(R0), R1 // arg 2 len
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MOVW 8(R0), R2 // arg 3 prot
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MOVW 12(R0), R3 // arg 4 flags
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MOVW 16(R0), R4 // arg 5 fid (on stack)
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MOVW R4, 0(R13)
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MOVW $0, R5 // pad (on stack)
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MOVW R5, 4(R13)
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MOVW 20(R0), R6 // arg 6 offset (on stack)
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MOVW R6, 8(R13) // low 32 bits
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MOVW $0, R7
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MOVW R7, 12(R13) // high 32 bits
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MOVW 0(R0), R0 // arg 1 addr
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BL libc_mmap(SB)
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MOVW $0, R1
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CMP $-1, R0
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BNE ok
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BL libc_errno(SB)
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MOVW (R0), R1 // errno
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MOVW $0, R0
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ok:
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MOVW R0, 24(R8)
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MOVW R1, 28(R8)
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MOVW R9, R13
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RET
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TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 len
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MOVW 0(R0), R0 // arg 1 addr
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BL libc_munmap(SB)
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CMP $-1, R0
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BNE 3(PC)
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MOVW $0, R8 // crash on failure
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MOVW R8, (R8)
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MOVW R9, R13
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RET
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TEXT runtime·madvise_trampoline(SB), NOSPLIT, $0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 len
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MOVW 8(R0), R2 // arg 3 advice
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MOVW 0(R0), R0 // arg 1 addr
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BL libc_madvise(SB)
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// ignore failure - maybe pages are locked
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MOVW R9, R13
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RET
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TEXT runtime·open_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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SUB $8, R13
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 - flags
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MOVW 8(R0), R2 // arg 3 - mode (vararg, on stack)
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MOVW R2, 0(R13)
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MOVW 0(R0), R0 // arg 1 - path
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MOVW R13, R4
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BIC $0x7, R13 // align for ELF ABI
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BL libc_open(SB)
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MOVW R9, R13
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RET
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TEXT runtime·close_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 0(R0), R0 // arg 1 - fd
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BL libc_close(SB)
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MOVW R9, R13
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RET
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TEXT runtime·read_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 - buf
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MOVW 8(R0), R2 // arg 3 - count
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MOVW 0(R0), R0 // arg 1 - fd
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BL libc_read(SB)
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CMP $-1, R0
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BNE noerr
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BL libc_errno(SB)
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MOVW (R0), R0 // errno
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RSB.CS $0, R0 // caller expects negative errno
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noerr:
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MOVW R9, R13
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RET
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TEXT runtime·write_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 buf
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MOVW 8(R0), R2 // arg 3 count
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MOVW 0(R0), R0 // arg 1 fd
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BL libc_write(SB)
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CMP $-1, R0
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BNE noerr
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BL libc_errno(SB)
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MOVW (R0), R0 // errno
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RSB.CS $0, R0 // caller expects negative errno
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noerr:
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MOVW R9, R13
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RET
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TEXT runtime·pipe2_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 flags
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MOVW 0(R0), R0 // arg 1 filedes
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BL libc_pipe2(SB)
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CMP $-1, R0
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BNE 3(PC)
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BL libc_errno(SB)
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MOVW (R0), R0 // errno
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RSB.CS $0, R0 // caller expects negative errno
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MOVW R9, R13
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RET
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TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 new
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MOVW 8(R0), R2 // arg 3 old
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MOVW 0(R0), R0 // arg 1 which
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BL libc_setitimer(SB)
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MOVW R9, R13
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RET
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TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 0(R0), R0 // arg 1 usec
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BL libc_usleep(SB)
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MOVW R9, R13
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RET
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TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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SUB $8, R13
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 miblen
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MOVW 8(R0), R2 // arg 3 out
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MOVW 12(R0), R3 // arg 4 size
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MOVW 16(R0), R4 // arg 5 dst (on stack)
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MOVW R4, 0(R13)
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MOVW 20(R0), R5 // arg 6 ndst (on stack)
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MOVW R5, 4(R13)
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MOVW 0(R0), R0 // arg 1 mib
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BL libc_sysctl(SB)
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MOVW R9, R13
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RET
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TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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BL libc_kqueue(SB)
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MOVW R9, R13
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RET
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TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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SUB $8, R13
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 keventt
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MOVW 8(R0), R2 // arg 3 nch
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MOVW 12(R0), R3 // arg 4 ev
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MOVW 16(R0), R4 // arg 5 nev (on stack)
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MOVW R4, 0(R13)
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MOVW 20(R0), R5 // arg 6 ts (on stack)
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MOVW R5, 4(R13)
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MOVW 0(R0), R0 // arg 1 kq
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BL libc_kevent(SB)
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CMP $-1, R0
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BNE ok
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BL libc_errno(SB)
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MOVW (R0), R0 // errno
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RSB.CS $0, R0 // caller expects negative errno
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ok:
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MOVW R9, R13
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RET
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TEXT runtime·clock_gettime_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 tp
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MOVW 0(R0), R0 // arg 1 clock_id
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BL libc_clock_gettime(SB)
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CMP $-1, R0
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BNE noerr
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BL libc_errno(SB)
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MOVW (R0), R0 // errno
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RSB.CS $0, R0 // caller expects negative errno
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noerr:
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MOVW R9, R13
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RET
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TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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SUB $8, R13
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BIC $0x7, R13 // align for ELF ABI
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MOVW R0, R8
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MOVW 0(R8), R0 // arg 1 fd
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MOVW 4(R8), R1 // arg 2 cmd
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MOVW 8(R8), R2 // arg 3 arg (vararg, on stack)
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MOVW R2, 0(R13)
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BL libc_fcntl(SB)
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MOVW $0, R1
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CMP $-1, R0
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BNE noerr
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BL libc_errno(SB)
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MOVW (R0), R1
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MOVW $-1, R0
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noerr:
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MOVW R0, 12(R8)
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MOVW R1, 16(R8)
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MOVW R9, R13
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RET
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TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 new
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MOVW 8(R0), R2 // arg 3 old
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MOVW 0(R0), R0 // arg 1 sig
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BL libc_sigaction(SB)
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CMP $-1, R0
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BNE 3(PC)
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MOVW $0, R8 // crash on failure
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MOVW R8, (R8)
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MOVW R9, R13
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RET
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TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 new
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MOVW 8(R0), R2 // arg 3 old
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MOVW 0(R0), R0 // arg 1 how
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BL libc_pthread_sigmask(SB)
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CMP $-1, R0
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BNE 3(PC)
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MOVW $0, R8 // crash on failure
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MOVW R8, (R8)
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MOVW R9, R13
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RET
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TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0
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MOVW R13, R9
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BIC $0x7, R13 // align for ELF ABI
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MOVW 4(R0), R1 // arg 2 old
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MOVW 0(R0), R0 // arg 1 new
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BL libc_sigaltstack(SB)
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CMP $-1, R0
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BNE 3(PC)
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MOVW $0, R8 // crash on failure
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MOVW R8, (R8)
|
|
MOVW R9, R13
|
|
RET
|
|
|
|
// syscall calls a function in libc on behalf of the syscall package.
|
|
// syscall takes a pointer to a struct like:
|
|
// struct {
|
|
// fn uintptr
|
|
// a1 uintptr
|
|
// a2 uintptr
|
|
// a3 uintptr
|
|
// r1 uintptr
|
|
// r2 uintptr
|
|
// err uintptr
|
|
// }
|
|
// syscall must be called on the g0 stack with the
|
|
// C calling convention (use libcCall).
|
|
//
|
|
// syscall expects a 32-bit result and tests for 32-bit -1
|
|
// to decide there was an error.
|
|
TEXT runtime·syscall(SB),NOSPLIT,$0
|
|
MOVW R13, R9
|
|
BIC $0x7, R13 // align for ELF ABI
|
|
|
|
MOVW R0, R8
|
|
|
|
MOVW (0*4)(R8), R7 // fn
|
|
MOVW (1*4)(R8), R0 // a1
|
|
MOVW (2*4)(R8), R1 // a2
|
|
MOVW (3*4)(R8), R2 // a3
|
|
|
|
BL (R7)
|
|
|
|
MOVW R0, (4*4)(R8) // r1
|
|
MOVW R1, (5*4)(R8) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMP $-1, R0
|
|
BNE ok
|
|
|
|
// Get error code from libc.
|
|
BL libc_errno(SB)
|
|
MOVW (R0), R1
|
|
MOVW R1, (6*4)(R8) // err
|
|
|
|
ok:
|
|
MOVW $0, R0 // no error (it's ignored anyway)
|
|
MOVW R9, R13
|
|
RET
|
|
|
|
// syscallX calls a function in libc on behalf of the syscall package.
|
|
// syscallX takes a pointer to a struct like:
|
|
// struct {
|
|
// fn uintptr
|
|
// a1 uintptr
|
|
// a2 uintptr
|
|
// a3 uintptr
|
|
// r1 uintptr
|
|
// r2 uintptr
|
|
// err uintptr
|
|
// }
|
|
// syscallX must be called on the g0 stack with the
|
|
// C calling convention (use libcCall).
|
|
//
|
|
// syscallX is like syscall but expects a 64-bit result
|
|
// and tests for 64-bit -1 to decide there was an error.
|
|
TEXT runtime·syscallX(SB),NOSPLIT,$0
|
|
MOVW R13, R9
|
|
BIC $0x7, R13 // align for ELF ABI
|
|
|
|
MOVW R0, R8
|
|
|
|
MOVW (0*4)(R8), R7 // fn
|
|
MOVW (1*4)(R8), R0 // a1
|
|
MOVW (2*4)(R8), R1 // a2
|
|
MOVW (3*4)(R8), R2 // a3
|
|
|
|
BL (R7)
|
|
|
|
MOVW R0, (4*4)(R8) // r1
|
|
MOVW R1, (5*4)(R8) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMP $-1, R0
|
|
BNE ok
|
|
CMP $-1, R1
|
|
BNE ok
|
|
|
|
// Get error code from libc.
|
|
BL libc_errno(SB)
|
|
MOVW (R0), R1
|
|
MOVW R1, (6*4)(R8) // err
|
|
|
|
ok:
|
|
MOVW $0, R0 // no error (it's ignored anyway)
|
|
MOVW R9, R13
|
|
RET
|
|
|
|
// syscall6 calls a function in libc on behalf of the syscall package.
|
|
// syscall6 takes a pointer to a struct like:
|
|
// struct {
|
|
// fn uintptr
|
|
// a1 uintptr
|
|
// a2 uintptr
|
|
// a3 uintptr
|
|
// a4 uintptr
|
|
// a5 uintptr
|
|
// a6 uintptr
|
|
// r1 uintptr
|
|
// r2 uintptr
|
|
// err uintptr
|
|
// }
|
|
// syscall6 must be called on the g0 stack with the
|
|
// C calling convention (use libcCall).
|
|
//
|
|
// syscall6 expects a 32-bit result and tests for 32-bit -1
|
|
// to decide there was an error.
|
|
TEXT runtime·syscall6(SB),NOSPLIT,$0
|
|
MOVW R13, R9
|
|
SUB $8, R13
|
|
BIC $0x7, R13 // align for ELF ABI
|
|
|
|
MOVW R0, R8
|
|
|
|
MOVW (0*4)(R8), R7 // fn
|
|
MOVW (1*4)(R8), R0 // a1
|
|
MOVW (2*4)(R8), R1 // a2
|
|
MOVW (3*4)(R8), R2 // a3
|
|
MOVW (4*4)(R8), R3 // a4
|
|
MOVW (5*4)(R8), R4 // a5
|
|
MOVW R4, 0(R13)
|
|
MOVW (6*4)(R8), R5 // a6
|
|
MOVW R5, 4(R13)
|
|
|
|
BL (R7)
|
|
|
|
MOVW R0, (7*4)(R8) // r1
|
|
MOVW R1, (8*4)(R8) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMP $-1, R0
|
|
BNE ok
|
|
|
|
// Get error code from libc.
|
|
BL libc_errno(SB)
|
|
MOVW (R0), R1
|
|
MOVW R1, (9*4)(R8) // err
|
|
|
|
ok:
|
|
MOVW $0, R0 // no error (it's ignored anyway)
|
|
MOVW R9, R13
|
|
RET
|
|
|
|
// syscall6X calls a function in libc on behalf of the syscall package.
|
|
// syscall6X takes a pointer to a struct like:
|
|
// struct {
|
|
// fn uintptr
|
|
// a1 uintptr
|
|
// a2 uintptr
|
|
// a3 uintptr
|
|
// a4 uintptr
|
|
// a5 uintptr
|
|
// a6 uintptr
|
|
// r1 uintptr
|
|
// r2 uintptr
|
|
// err uintptr
|
|
// }
|
|
// syscall6X must be called on the g0 stack with the
|
|
// C calling convention (use libcCall).
|
|
//
|
|
// syscall6X is like syscall6 but expects a 64-bit result
|
|
// and tests for 64-bit -1 to decide there was an error.
|
|
TEXT runtime·syscall6X(SB),NOSPLIT,$0
|
|
MOVW R13, R9
|
|
SUB $8, R13
|
|
BIC $0x7, R13 // align for ELF ABI
|
|
|
|
MOVW R0, R8
|
|
|
|
MOVW (0*4)(R8), R7 // fn
|
|
MOVW (1*4)(R8), R0 // a1
|
|
MOVW (2*4)(R8), R1 // a2
|
|
MOVW (3*4)(R8), R2 // a3
|
|
MOVW (4*4)(R8), R3 // a4
|
|
MOVW (5*4)(R8), R4 // a5
|
|
MOVW R4, 0(R13)
|
|
MOVW (6*4)(R8), R5 // a6
|
|
MOVW R5, 4(R13)
|
|
|
|
BL (R7)
|
|
|
|
MOVW R0, (7*4)(R8) // r1
|
|
MOVW R1, (8*4)(R8) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMP $-1, R0
|
|
BNE ok
|
|
CMP $-1, R1
|
|
BNE ok
|
|
|
|
// Get error code from libc.
|
|
BL libc_errno(SB)
|
|
MOVW (R0), R1
|
|
MOVW R1, (9*4)(R8) // err
|
|
|
|
ok:
|
|
MOVW $0, R0 // no error (it's ignored anyway)
|
|
MOVW R9, R13
|
|
RET
|
|
|
|
// syscall10 calls a function in libc on behalf of the syscall package.
|
|
// syscall10 takes a pointer to a struct like:
|
|
// struct {
|
|
// fn uintptr
|
|
// a1 uintptr
|
|
// a2 uintptr
|
|
// a3 uintptr
|
|
// a4 uintptr
|
|
// a5 uintptr
|
|
// a6 uintptr
|
|
// a7 uintptr
|
|
// a8 uintptr
|
|
// a9 uintptr
|
|
// a10 uintptr
|
|
// r1 uintptr
|
|
// r2 uintptr
|
|
// err uintptr
|
|
// }
|
|
// syscall10 must be called on the g0 stack with the
|
|
// C calling convention (use libcCall).
|
|
TEXT runtime·syscall10(SB),NOSPLIT,$0
|
|
MOVW R13, R9
|
|
SUB $24, R13
|
|
BIC $0x7, R13 // align for ELF ABI
|
|
|
|
MOVW R0, R8
|
|
|
|
MOVW (0*4)(R8), R7 // fn
|
|
MOVW (1*4)(R8), R0 // a1
|
|
MOVW (2*4)(R8), R1 // a2
|
|
MOVW (3*4)(R8), R2 // a3
|
|
MOVW (4*4)(R8), R3 // a4
|
|
MOVW (5*4)(R8), R4 // a5
|
|
MOVW R4, 0(R13)
|
|
MOVW (6*4)(R8), R5 // a6
|
|
MOVW R5, 4(R13)
|
|
MOVW (7*4)(R8), R6 // a7
|
|
MOVW R6, 8(R13)
|
|
MOVW (8*4)(R8), R4 // a8
|
|
MOVW R4, 12(R13)
|
|
MOVW (9*4)(R8), R5 // a9
|
|
MOVW R5, 16(R13)
|
|
MOVW (10*4)(R8), R6 // a10
|
|
MOVW R6, 20(R13)
|
|
|
|
BL (R7)
|
|
|
|
MOVW R0, (11*4)(R8) // r1
|
|
MOVW R1, (12*4)(R8) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMP $-1, R0
|
|
BNE ok
|
|
|
|
// Get error code from libc.
|
|
BL libc_errno(SB)
|
|
MOVW (R0), R1
|
|
MOVW R1, (13*4)(R8) // err
|
|
|
|
ok:
|
|
MOVW $0, R0 // no error (it's ignored anyway)
|
|
MOVW R9, R13
|
|
RET
|
|
|
|
// syscall10X calls a function in libc on behalf of the syscall package.
|
|
// syscall10X takes a pointer to a struct like:
|
|
// struct {
|
|
// fn uintptr
|
|
// a1 uintptr
|
|
// a2 uintptr
|
|
// a3 uintptr
|
|
// a4 uintptr
|
|
// a5 uintptr
|
|
// a6 uintptr
|
|
// a7 uintptr
|
|
// a8 uintptr
|
|
// a9 uintptr
|
|
// a10 uintptr
|
|
// r1 uintptr
|
|
// r2 uintptr
|
|
// err uintptr
|
|
// }
|
|
// syscall10X must be called on the g0 stack with the
|
|
// C calling convention (use libcCall).
|
|
//
|
|
// syscall10X is like syscall10 but expects a 64-bit result
|
|
// and tests for 64-bit -1 to decide there was an error.
|
|
TEXT runtime·syscall10X(SB),NOSPLIT,$0
|
|
MOVW R13, R9
|
|
SUB $24, R13
|
|
BIC $0x7, R13 // align for ELF ABI
|
|
|
|
MOVW R0, R8
|
|
|
|
MOVW (0*4)(R8), R7 // fn
|
|
MOVW (1*4)(R8), R0 // a1
|
|
MOVW (2*4)(R8), R1 // a2
|
|
MOVW (3*4)(R8), R2 // a3
|
|
MOVW (4*4)(R8), R3 // a4
|
|
MOVW (5*4)(R8), R4 // a5
|
|
MOVW R4, 0(R13)
|
|
MOVW (6*4)(R8), R5 // a6
|
|
MOVW R5, 4(R13)
|
|
MOVW (7*4)(R8), R6 // a7
|
|
MOVW R6, 8(R13)
|
|
MOVW (8*4)(R8), R4 // a8
|
|
MOVW R4, 12(R13)
|
|
MOVW (9*4)(R8), R5 // a9
|
|
MOVW R5, 16(R13)
|
|
MOVW (10*4)(R8), R6 // a10
|
|
MOVW R6, 20(R13)
|
|
|
|
BL (R7)
|
|
|
|
MOVW R0, (11*4)(R8) // r1
|
|
MOVW R1, (12*4)(R8) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMP $-1, R0
|
|
BNE ok
|
|
CMP $-1, R1
|
|
BNE ok
|
|
|
|
// Get error code from libc.
|
|
BL libc_errno(SB)
|
|
MOVW (R0), R1
|
|
MOVW R1, (13*4)(R8) // err
|
|
|
|
ok:
|
|
MOVW $0, R0 // no error (it's ignored anyway)
|
|
MOVW R9, R13
|
|
RET
|
|
|
|
TEXT runtime·issetugid_trampoline(SB),NOSPLIT,$0
|
|
MOVW R13, R9
|
|
MOVW R0, R8
|
|
BIC $0x7, R13 // align for ELF ABI
|
|
BL libc_issetugid(SB)
|
|
MOVW R0, 0(R8)
|
|
MOVW R9, R13
|
|
RET
|