mirror of https://go.googlesource.com/go
991 lines
20 KiB
ArmAsm
991 lines
20 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 386, OpenBSD
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// System calls are implemented in libc/libpthread, this file
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// contains trampolines that convert from Go to C calling convention.
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// Some direct system call implementations currently remain.
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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_MONOTONIC $3
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TEXT runtime·setldt(SB),NOSPLIT,$0
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// Nothing to do, pthread already set thread-local storage up.
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RET
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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,$28
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NOP SP // tell vet SP changed - stop checking offsets
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// We are already on m's g0 stack.
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// Save callee-save registers.
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MOVL BX, bx-4(SP)
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MOVL BP, bp-8(SP)
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MOVL SI, si-12(SP)
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MOVL DI, di-16(SP)
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MOVL 32(SP), AX // m
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MOVL m_g0(AX), DX
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get_tls(CX)
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MOVL DX, g(CX)
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CALL runtime·mstart(SB)
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// Restore callee-save registers.
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MOVL di-16(SP), DI
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MOVL si-12(SP), SI
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MOVL bp-8(SP), BP
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MOVL bx-4(SP), BX
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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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MOVL $0, AX
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RET
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TEXT runtime·sigfwd(SB),NOSPLIT,$0-16
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MOVL fn+0(FP), AX
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MOVL sig+4(FP), BX
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MOVL info+8(FP), CX
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MOVL ctx+12(FP), DX
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MOVL SP, SI
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SUBL $32, SP
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ANDL $~15, SP // align stack: handler might be a C function
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MOVL BX, 0(SP)
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MOVL CX, 4(SP)
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MOVL DX, 8(SP)
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MOVL SI, 12(SP) // save SI: handler might be a Go function
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CALL AX
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MOVL 12(SP), AX
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MOVL AX, SP
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RET
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// Called by OS using C ABI.
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TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$28
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NOP SP // tell vet SP changed - stop checking offsets
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// Save callee-saved C registers, since the caller may be a C signal handler.
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MOVL BX, bx-4(SP)
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MOVL BP, bp-8(SP)
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MOVL SI, si-12(SP)
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MOVL DI, di-16(SP)
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// We don't save mxcsr or the x87 control word because sigtrampgo doesn't
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// modify them.
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MOVL 32(SP), BX // signo
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MOVL BX, 0(SP)
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MOVL 36(SP), BX // info
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MOVL BX, 4(SP)
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MOVL 40(SP), BX // context
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MOVL BX, 8(SP)
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CALL runtime·sigtrampgo(SB)
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MOVL di-16(SP), DI
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MOVL si-12(SP), SI
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MOVL bp-8(SP), BP
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MOVL bx-4(SP), BX
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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 on the stack.
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// A single int32 result is returned in AX.
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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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PUSHL BP
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MOVL SP, BP
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SUBL $4, SP
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MOVL 12(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL AX, 0(SP) // arg 1 - attr
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CALL libc_pthread_attr_init(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·pthread_attr_destroy_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $4, SP
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MOVL 12(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL AX, 0(SP) // arg 1 - attr
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CALL libc_pthread_attr_destroy(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·pthread_attr_getstacksize_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $8, SP
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MOVL 16(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL AX, 0(SP) // arg 1 - attr
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MOVL BX, 4(SP) // arg 2 - size
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CALL libc_pthread_attr_getstacksize(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $8, SP
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MOVL 16(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL AX, 0(SP) // arg 1 - attr
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MOVL BX, 4(SP) // arg 2 - state
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CALL libc_pthread_attr_setdetachstate(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $20, SP
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MOVL 28(SP), DX // pointer to args
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LEAL 16(SP), AX
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MOVL AX, 0(SP) // arg 1 - &threadid (discarded)
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL 8(DX), CX
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MOVL AX, 4(SP) // arg 2 - attr
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MOVL BX, 8(SP) // arg 3 - start
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MOVL CX, 12(SP) // arg 4 - arg
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CALL libc_pthread_create(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·thrkill_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $12, SP
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MOVL 20(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL AX, 0(SP) // arg 1 - tid
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MOVL BX, 4(SP) // arg 2 - signal
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MOVL $0, 8(SP) // arg 3 - tcb
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CALL libc_thrkill(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·thrsleep_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $20, SP
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MOVL 28(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL 8(DX), CX
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MOVL AX, 0(SP) // arg 1 - id
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MOVL BX, 4(SP) // arg 2 - clock_id
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MOVL CX, 8(SP) // arg 3 - abstime
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MOVL 12(DX), AX
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MOVL 16(DX), BX
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MOVL AX, 12(SP) // arg 4 - lock
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MOVL BX, 16(SP) // arg 5 - abort
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CALL libc_thrsleep(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·thrwakeup_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $8, SP
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MOVL 16(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL AX, 0(SP) // arg 1 - id
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MOVL BX, 4(SP) // arg 2 - count
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CALL libc_thrwakeup(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·exit_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $4, SP
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MOVL 12(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL AX, 0(SP) // arg 1 - status
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CALL libc_exit(SB)
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MOVL $0xf1, 0xf1 // crash on failure
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·getthrid_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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CALL libc_getthrid(SB)
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NOP SP // tell vet SP changed - stop checking offsets
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MOVL 8(SP), DX // pointer to return value
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MOVL AX, 0(DX)
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POPL BP
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RET
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TEXT runtime·raiseproc_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $8, SP
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MOVL 16(SP), DX
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MOVL 0(DX), BX
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CALL libc_getpid(SB)
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MOVL AX, 0(SP) // arg 1 - pid
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MOVL BX, 4(SP) // arg 2 - signal
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CALL libc_kill(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·sched_yield_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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CALL libc_sched_yield(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $32, SP
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MOVL 40(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL 8(DX), CX
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MOVL AX, 0(SP) // arg 1 - addr
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MOVL BX, 4(SP) // arg 2 - len
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MOVL CX, 8(SP) // arg 3 - prot
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MOVL 12(DX), AX
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MOVL 16(DX), BX
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MOVL 20(DX), CX
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MOVL AX, 12(SP) // arg 4 - flags
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MOVL BX, 16(SP) // arg 5 - fid
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MOVL $0, 20(SP) // pad
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MOVL CX, 24(SP) // arg 6 - offset (low 32 bits)
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MOVL $0, 28(SP) // offset (high 32 bits)
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CALL libc_mmap(SB)
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MOVL $0, BX
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CMPL AX, $-1
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JNE ok
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CALL libc_errno(SB)
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MOVL (AX), BX
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MOVL $0, AX
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ok:
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MOVL 40(SP), DX
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MOVL AX, 24(DX)
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MOVL BX, 28(DX)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $8, SP
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MOVL 16(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL AX, 0(SP) // arg 1 - addr
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MOVL BX, 4(SP) // arg 2 - len
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CALL libc_munmap(SB)
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CMPL AX, $-1
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JNE 2(PC)
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MOVL $0xf1, 0xf1 // crash on failure
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·madvise_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $12, SP
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MOVL 20(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL 8(DX), CX
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MOVL AX, 0(SP) // arg 1 - addr
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MOVL BX, 4(SP) // arg 2 - len
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MOVL CX, 8(SP) // arg 3 - advice
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CALL libc_madvise(SB)
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// ignore failure - maybe pages are locked
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·open_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $16, SP
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MOVL 24(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL 8(DX), CX
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MOVL AX, 0(SP) // arg 1 - path
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MOVL BX, 4(SP) // arg 2 - flags
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MOVL CX, 8(SP) // arg 3 - mode
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MOVL $0, 12(SP) // vararg
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CALL libc_open(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·close_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $4, SP
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MOVL 12(SP), DX
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MOVL 0(DX), AX
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MOVL AX, 0(SP) // arg 1 - fd
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CALL libc_close(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·read_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $12, SP
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MOVL 20(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL 8(DX), CX
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MOVL AX, 0(SP) // arg 1 - fd
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MOVL BX, 4(SP) // arg 2 - buf
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MOVL CX, 8(SP) // arg 3 - count
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CALL libc_read(SB)
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CMPL AX, $-1
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JNE noerr
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CALL libc_errno(SB)
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MOVL (AX), AX
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NEGL AX // caller expects negative errno
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noerr:
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·write_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $12, SP
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MOVL 20(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL 8(DX), CX
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MOVL AX, 0(SP) // arg 1 - fd
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MOVL BX, 4(SP) // arg 2 - buf
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MOVL CX, 8(SP) // arg 3 - count
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CALL libc_write(SB)
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CMPL AX, $-1
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JNE noerr
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CALL libc_errno(SB)
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MOVL (AX), AX
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NEGL AX // caller expects negative errno
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noerr:
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·pipe2_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $8, SP
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MOVL 16(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL AX, 0(SP) // arg 1 - fds
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MOVL BX, 4(SP) // arg 2 - flags
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CALL libc_pipe2(SB)
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CMPL AX, $-1
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JNE noerr
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CALL libc_errno(SB)
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MOVL (AX), AX
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NEGL AX // caller expects negative errno
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noerr:
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $12, SP
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MOVL 20(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL 8(DX), CX
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MOVL AX, 0(SP) // arg 1 - which
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MOVL BX, 4(SP) // arg 2 - new
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MOVL CX, 8(SP) // arg 3 - old
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CALL libc_setitimer(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $4, SP
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MOVL 12(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL AX, 0(SP)
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CALL libc_usleep(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $24, SP
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MOVL 32(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL 8(DX), CX
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MOVL AX, 0(SP) // arg 1 - name
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MOVL BX, 4(SP) // arg 2 - namelen
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MOVL CX, 8(SP) // arg 3 - old
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MOVL 12(DX), AX
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MOVL 16(DX), BX
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MOVL 20(DX), CX
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MOVL AX, 12(SP) // arg 4 - oldlenp
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MOVL BX, 16(SP) // arg 5 - newp
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MOVL CX, 20(SP) // arg 6 - newlen
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CALL libc_sysctl(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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CALL libc_kqueue(SB)
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $24, SP
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MOVL 32(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL 8(DX), CX
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MOVL AX, 0(SP) // arg 1 - kq
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MOVL BX, 4(SP) // arg 2 - keventt
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MOVL CX, 8(SP) // arg 3 - nch
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MOVL 12(DX), AX
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MOVL 16(DX), BX
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MOVL 20(DX), CX
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MOVL AX, 12(SP) // arg 4 - ev
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MOVL BX, 16(SP) // arg 5 - nev
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MOVL CX, 20(SP) // arg 6 - ts
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CALL libc_kevent(SB)
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CMPL AX, $-1
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JNE noerr
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CALL libc_errno(SB)
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MOVL (AX), AX
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NEGL AX // caller expects negative errno
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noerr:
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MOVL BP, SP
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POPL BP
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RET
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TEXT runtime·clock_gettime_trampoline(SB),NOSPLIT,$0
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PUSHL BP
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MOVL SP, BP
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SUBL $8, SP
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MOVL 16(SP), DX // pointer to args
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MOVL 0(DX), AX
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MOVL 4(DX), BX
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MOVL AX, 0(SP) // arg 1 - tp
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MOVL BX, 4(SP) // arg 2 - clock_id
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CALL libc_clock_gettime(SB)
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CMPL AX, $-1
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JNE noerr
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CALL libc_errno(SB)
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MOVL (AX), AX
|
|
NEGL AX // caller expects negative errno
|
|
noerr:
|
|
MOVL BP, SP
|
|
POPL BP
|
|
RET
|
|
|
|
TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0
|
|
PUSHL BP
|
|
MOVL SP, BP
|
|
SUBL $16, SP
|
|
MOVL 24(SP), DX // pointer to args
|
|
MOVL 0(DX), AX
|
|
MOVL 4(DX), BX
|
|
MOVL 8(DX), CX
|
|
MOVL AX, 0(SP) // arg 1 - fd
|
|
MOVL BX, 4(SP) // arg 2 - cmd
|
|
MOVL CX, 8(SP) // arg 3 - arg
|
|
MOVL $0, 12(SP) // vararg
|
|
CALL libc_fcntl(SB)
|
|
MOVL $0, BX
|
|
CMPL AX, $-1
|
|
JNE noerr
|
|
CALL libc_errno(SB)
|
|
MOVL (AX), BX
|
|
MOVL $-1, AX
|
|
noerr:
|
|
MOVL 24(SP), DX // pointer to args
|
|
MOVL AX, 12(DX)
|
|
MOVL BX, 16(DX)
|
|
MOVL BP, SP
|
|
POPL BP
|
|
RET
|
|
|
|
TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0
|
|
PUSHL BP
|
|
MOVL SP, BP
|
|
SUBL $12, SP
|
|
MOVL 20(SP), DX // pointer to args
|
|
MOVL 0(DX), AX
|
|
MOVL 4(DX), BX
|
|
MOVL 8(DX), CX
|
|
MOVL AX, 0(SP) // arg 1 - sig
|
|
MOVL BX, 4(SP) // arg 2 - new
|
|
MOVL CX, 8(SP) // arg 3 - old
|
|
CALL libc_sigaction(SB)
|
|
CMPL AX, $-1
|
|
JNE 2(PC)
|
|
MOVL $0xf1, 0xf1 // crash on failure
|
|
MOVL BP, SP
|
|
POPL BP
|
|
RET
|
|
|
|
TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0
|
|
PUSHL BP
|
|
MOVL SP, BP
|
|
SUBL $12, SP
|
|
MOVL 20(SP), DX // pointer to args
|
|
MOVL 0(DX), AX
|
|
MOVL 4(DX), BX
|
|
MOVL 8(DX), CX
|
|
MOVL AX, 0(SP) // arg 1 - how
|
|
MOVL BX, 4(SP) // arg 2 - new
|
|
MOVL CX, 8(SP) // arg 3 - old
|
|
CALL libc_pthread_sigmask(SB)
|
|
CMPL AX, $-1
|
|
JNE 2(PC)
|
|
MOVL $0xf1, 0xf1 // crash on failure
|
|
MOVL BP, SP
|
|
POPL BP
|
|
RET
|
|
|
|
TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0
|
|
PUSHL BP
|
|
MOVL SP, BP
|
|
SUBL $8, SP
|
|
MOVL 16(SP), DX // pointer to args
|
|
MOVL 0(DX), AX
|
|
MOVL 4(DX), BX
|
|
MOVL AX, 0(SP) // arg 1 - new
|
|
MOVL BX, 4(SP) // arg 2 - old
|
|
CALL libc_sigaltstack(SB)
|
|
CMPL AX, $-1
|
|
JNE 2(PC)
|
|
MOVL $0xf1, 0xf1 // crash on failure
|
|
MOVL BP, SP
|
|
POPL BP
|
|
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
|
|
PUSHL BP
|
|
MOVL SP, BP
|
|
|
|
SUBL $12, SP
|
|
MOVL 20(SP), BX // pointer to args
|
|
|
|
MOVL (1*4)(BX), AX
|
|
MOVL (2*4)(BX), CX
|
|
MOVL (3*4)(BX), DX
|
|
MOVL AX, (0*4)(SP) // a1
|
|
MOVL CX, (1*4)(SP) // a2
|
|
MOVL DX, (2*4)(SP) // a3
|
|
|
|
MOVL (0*4)(BX), AX // fn
|
|
CALL AX
|
|
|
|
MOVL AX, (4*4)(BX) // r1
|
|
MOVL DX, (5*4)(BX) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMPL AX, $-1
|
|
JNE ok
|
|
|
|
// Get error code from libc.
|
|
CALL libc_errno(SB)
|
|
MOVL (AX), AX
|
|
MOVW AX, (6*4)(BX) // err
|
|
|
|
ok:
|
|
MOVL $0, AX // no error (it's ignored anyway)
|
|
MOVL BP, SP
|
|
POPL BP
|
|
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
|
|
PUSHL BP
|
|
MOVL SP, BP
|
|
|
|
SUBL $12, SP
|
|
MOVL 20(SP), BX // pointer to args
|
|
|
|
MOVL (1*4)(BX), AX
|
|
MOVL (2*4)(BX), CX
|
|
MOVL (3*4)(BX), DX
|
|
MOVL AX, (0*4)(SP) // a1
|
|
MOVL CX, (1*4)(SP) // a2
|
|
MOVL DX, (2*4)(SP) // a3
|
|
|
|
MOVL (0*4)(BX), AX // fn
|
|
CALL AX
|
|
|
|
MOVL AX, (4*4)(BX) // r1
|
|
MOVL DX, (5*4)(BX) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMPL AX, $-1
|
|
JNE ok
|
|
CMPL DX, $-1
|
|
JNE ok
|
|
|
|
// Get error code from libc.
|
|
CALL libc_errno(SB)
|
|
MOVL (AX), AX
|
|
MOVW AX, (6*4)(BX) // err
|
|
|
|
ok:
|
|
MOVL $0, AX // no error (it's ignored anyway)
|
|
MOVL BP, SP
|
|
POPL BP
|
|
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
|
|
PUSHL BP
|
|
MOVL SP, BP
|
|
|
|
SUBL $24, SP
|
|
MOVL 32(SP), BX // pointer to args
|
|
|
|
MOVL (1*4)(BX), AX
|
|
MOVL (2*4)(BX), CX
|
|
MOVL (3*4)(BX), DX
|
|
MOVL AX, (0*4)(SP) // a1
|
|
MOVL CX, (1*4)(SP) // a2
|
|
MOVL DX, (2*4)(SP) // a3
|
|
MOVL (4*4)(BX), AX
|
|
MOVL (5*4)(BX), CX
|
|
MOVL (6*4)(BX), DX
|
|
MOVL AX, (3*4)(SP) // a4
|
|
MOVL CX, (4*4)(SP) // a5
|
|
MOVL DX, (5*4)(SP) // a6
|
|
|
|
MOVL (0*4)(BX), AX // fn
|
|
CALL AX
|
|
|
|
MOVL AX, (7*4)(BX) // r1
|
|
MOVL DX, (8*4)(BX) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMPL AX, $-1
|
|
JNE ok
|
|
|
|
// Get error code from libc.
|
|
CALL libc_errno(SB)
|
|
MOVL (AX), AX
|
|
MOVW AX, (9*4)(BX) // err
|
|
|
|
ok:
|
|
MOVL $0, AX // no error (it's ignored anyway)
|
|
MOVL BP, SP
|
|
POPL BP
|
|
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
|
|
PUSHL BP
|
|
MOVL SP, BP
|
|
|
|
SUBL $24, SP
|
|
MOVL 32(SP), BX // pointer to args
|
|
|
|
MOVL (1*4)(BX), AX
|
|
MOVL (2*4)(BX), CX
|
|
MOVL (3*4)(BX), DX
|
|
MOVL AX, (0*4)(SP) // a1
|
|
MOVL CX, (1*4)(SP) // a2
|
|
MOVL DX, (2*4)(SP) // a3
|
|
MOVL (4*4)(BX), AX
|
|
MOVL (5*4)(BX), CX
|
|
MOVL (6*4)(BX), DX
|
|
MOVL AX, (3*4)(SP) // a4
|
|
MOVL CX, (4*4)(SP) // a5
|
|
MOVL DX, (5*4)(SP) // a6
|
|
|
|
MOVL (0*4)(BX), AX // fn
|
|
CALL AX
|
|
|
|
MOVL AX, (7*4)(BX) // r1
|
|
MOVL DX, (8*4)(BX) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMPL AX, $-1
|
|
JNE ok
|
|
CMPL DX, $-1
|
|
JNE ok
|
|
|
|
// Get error code from libc.
|
|
CALL libc_errno(SB)
|
|
MOVL (AX), AX
|
|
MOVW AX, (9*4)(BX) // err
|
|
|
|
ok:
|
|
MOVL $0, AX // no error (it's ignored anyway)
|
|
MOVL BP, SP
|
|
POPL BP
|
|
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
|
|
PUSHL BP
|
|
MOVL SP, BP
|
|
|
|
SUBL $40, SP
|
|
MOVL 48(SP), BX // pointer to args
|
|
|
|
MOVL (1*4)(BX), AX
|
|
MOVL (2*4)(BX), CX
|
|
MOVL (3*4)(BX), DX
|
|
MOVL AX, (0*4)(SP) // a1
|
|
MOVL CX, (1*4)(SP) // a2
|
|
MOVL DX, (2*4)(SP) // a3
|
|
MOVL (4*4)(BX), AX
|
|
MOVL (5*4)(BX), CX
|
|
MOVL (6*4)(BX), DX
|
|
MOVL AX, (3*4)(SP) // a4
|
|
MOVL CX, (4*4)(SP) // a5
|
|
MOVL DX, (5*4)(SP) // a6
|
|
MOVL (7*4)(BX), AX
|
|
MOVL (8*4)(BX), CX
|
|
MOVL (9*4)(BX), DX
|
|
MOVL AX, (6*4)(SP) // a7
|
|
MOVL CX, (7*4)(SP) // a8
|
|
MOVL DX, (8*4)(SP) // a9
|
|
MOVL (10*4)(BX), AX
|
|
MOVL AX, (9*4)(SP) // a10
|
|
|
|
MOVL (0*4)(BX), AX // fn
|
|
CALL AX
|
|
|
|
MOVL AX, (11*4)(BX) // r1
|
|
MOVL DX, (12*4)(BX) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMPL AX, $-1
|
|
JNE ok
|
|
|
|
// Get error code from libc.
|
|
CALL libc_errno(SB)
|
|
MOVL (AX), AX
|
|
MOVW AX, (13*4)(BX) // err
|
|
|
|
ok:
|
|
MOVL $0, AX // no error (it's ignored anyway)
|
|
MOVL BP, SP
|
|
POPL BP
|
|
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 syscall9 but expects a 64-bit result
|
|
// and tests for 64-bit -1 to decide there was an error.
|
|
TEXT runtime·syscall10X(SB),NOSPLIT,$0
|
|
PUSHL BP
|
|
MOVL SP, BP
|
|
|
|
SUBL $40, SP
|
|
MOVL 48(SP), BX // pointer to args
|
|
|
|
MOVL (1*4)(BX), AX
|
|
MOVL (2*4)(BX), CX
|
|
MOVL (3*4)(BX), DX
|
|
MOVL AX, (0*4)(SP) // a1
|
|
MOVL CX, (1*4)(SP) // a2
|
|
MOVL DX, (2*4)(SP) // a3
|
|
MOVL (4*4)(BX), AX
|
|
MOVL (5*4)(BX), CX
|
|
MOVL (6*4)(BX), DX
|
|
MOVL AX, (3*4)(SP) // a4
|
|
MOVL CX, (4*4)(SP) // a5
|
|
MOVL DX, (5*4)(SP) // a6
|
|
MOVL (7*4)(BX), AX
|
|
MOVL (8*4)(BX), CX
|
|
MOVL (9*4)(BX), DX
|
|
MOVL AX, (6*4)(SP) // a7
|
|
MOVL CX, (7*4)(SP) // a8
|
|
MOVL DX, (8*4)(SP) // a9
|
|
MOVL (10*4)(BX), AX
|
|
MOVL AX, (9*4)(SP) // a10
|
|
|
|
MOVL (0*4)(BX), AX // fn
|
|
CALL AX
|
|
|
|
MOVL AX, (11*4)(BX) // r1
|
|
MOVL DX, (12*4)(BX) // r2
|
|
|
|
// Standard libc functions return -1 on error and set errno.
|
|
CMPL AX, $-1
|
|
JNE ok
|
|
CMPL DX, $-1
|
|
JNE ok
|
|
|
|
// Get error code from libc.
|
|
CALL libc_errno(SB)
|
|
MOVL (AX), AX
|
|
MOVW AX, (13*4)(BX) // err
|
|
|
|
ok:
|
|
MOVL $0, AX // no error (it's ignored anyway)
|
|
MOVL BP, SP
|
|
POPL BP
|
|
RET
|
|
|
|
TEXT runtime·issetugid_trampoline(SB),NOSPLIT,$0
|
|
PUSHL BP
|
|
CALL libc_issetugid(SB)
|
|
NOP SP // tell vet SP changed - stop checking offsets
|
|
MOVL 8(SP), DX // pointer to return value
|
|
MOVL AX, 0(DX)
|
|
POPL BP
|
|
RET
|