mirror of
https://github.com/golang/go
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2f1ead7095
Fixes #3250. R=rsc CC=golang-dev https://golang.org/cl/10757044
384 lines
7.0 KiB
ArmAsm
384 lines
7.0 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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// /usr/src/sys/kern/syscalls.master for syscall numbers.
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//
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#include "zasm_GOOS_GOARCH.h"
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// Exit the entire program (like C exit)
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TEXT runtime·exit(SB),7,$-4
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MOVL $1, AX
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INT $0x80
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·exit1(SB),7,$8
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MOVL $0, 0(SP)
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MOVL $0, 4(SP) // arg 1 - notdead
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MOVL $302, AX // sys___threxit
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INT $0x80
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JAE 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·open(SB),7,$-4
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MOVL $5, AX
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INT $0x80
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RET
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TEXT runtime·close(SB),7,$-4
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MOVL $6, AX
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INT $0x80
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RET
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TEXT runtime·read(SB),7,$-4
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MOVL $3, AX
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INT $0x80
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RET
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TEXT runtime·write(SB),7,$-4
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MOVL $4, AX // sys_write
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INT $0x80
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RET
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TEXT runtime·usleep(SB),7,$20
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MOVL $0, DX
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MOVL usec+0(FP), AX
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MOVL $1000000, CX
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DIVL CX
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MOVL AX, 12(SP) // tv_sec
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MOVL $1000, AX
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MULL DX
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MOVL AX, 16(SP) // tv_nsec
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MOVL $0, 0(SP)
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LEAL 12(SP), AX
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MOVL AX, 4(SP) // arg 1 - rqtp
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MOVL $0, 8(SP) // arg 2 - rmtp
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MOVL $240, AX // sys_nanosleep
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INT $0x80
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RET
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TEXT runtime·raise(SB),7,$12
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MOVL $299, AX // sys_getthrid
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INT $0x80
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MOVL $0, 0(SP)
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MOVL AX, 4(SP) // arg 1 - pid
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MOVL sig+0(FP), AX
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MOVL AX, 8(SP) // arg 2 - signum
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MOVL $37, AX // sys_kill
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INT $0x80
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RET
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TEXT runtime·mmap(SB),7,$36
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LEAL arg0+0(FP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL // arg 1 - addr
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MOVSL // arg 2 - len
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MOVSL // arg 3 - prot
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MOVSL // arg 4 - flags
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MOVSL // arg 5 - fd
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MOVL $0, AX
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STOSL // arg 6 - pad
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MOVSL // arg 7 - offset
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MOVL $0, AX // top 32 bits of file offset
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STOSL
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MOVL $197, AX // sys_mmap
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INT $0x80
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RET
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TEXT runtime·munmap(SB),7,$-4
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MOVL $73, AX // sys_munmap
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INT $0x80
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JAE 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·madvise(SB),7,$-4
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MOVL $75, AX // sys_madvise
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INT $0x80
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JAE 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·setitimer(SB),7,$-4
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MOVL $83, AX
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INT $0x80
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RET
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// func now() (sec int64, nsec int32)
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TEXT time·now(SB), 7, $32
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MOVL $232, AX
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LEAL 12(SP), BX
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MOVL $0, 4(SP)
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MOVL BX, 8(SP)
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INT $0x80
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MOVL 12(SP), AX // sec
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MOVL 16(SP), BX // nsec
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// sec is in AX, nsec in BX
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MOVL AX, sec+0(FP)
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MOVL $0, sec+4(FP)
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MOVL BX, nsec+8(FP)
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RET
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// int64 nanotime(void) so really
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// void nanotime(int64 *nsec)
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TEXT runtime·nanotime(SB),7,$32
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MOVL $232, AX
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LEAL 12(SP), BX
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MOVL $0, 4(SP)
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MOVL BX, 8(SP)
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INT $0x80
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MOVL 12(SP), AX // sec
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MOVL 16(SP), BX // nsec
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// sec is in AX, nsec in BX
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// convert to DX:AX nsec
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MOVL $1000000000, CX
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MULL CX
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ADDL BX, AX
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ADCL $0, DX
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MOVL ret+0(FP), DI
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MOVL AX, 0(DI)
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MOVL DX, 4(DI)
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RET
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TEXT runtime·sigaction(SB),7,$-4
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MOVL $46, AX // sys_sigaction
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INT $0x80
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JAE 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·sigprocmask(SB),7,$-4
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MOVL $48, AX // sys_sigprocmask
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INT $0x80
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JAE 2(PC)
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MOVL $0xf1, 0xf1 // crash
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MOVL AX, oset+0(FP)
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RET
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TEXT runtime·sigtramp(SB),7,$44
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get_tls(CX)
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// check that m exists
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MOVL m(CX), BX
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CMPL BX, $0
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JNE 6(PC)
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MOVL signo+0(FP), BX
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MOVL BX, 0(SP)
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MOVL $runtime·badsignal(SB), AX
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CALL AX
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JMP sigtramp_ret
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// save g
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MOVL g(CX), DI
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MOVL DI, 20(SP)
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// g = m->gsignal
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MOVL m_gsignal(BX), BX
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MOVL BX, g(CX)
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// copy arguments for call to sighandler
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MOVL signo+0(FP), BX
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MOVL BX, 0(SP)
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MOVL info+4(FP), BX
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MOVL BX, 4(SP)
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MOVL context+8(FP), BX
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MOVL BX, 8(SP)
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MOVL DI, 12(SP)
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CALL runtime·sighandler(SB)
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// restore g
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get_tls(CX)
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MOVL 20(SP), BX
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MOVL BX, g(CX)
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sigtramp_ret:
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// call sigreturn
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MOVL context+8(FP), AX
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MOVL $0, 0(SP) // syscall gap
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MOVL AX, 4(SP) // arg 1 - sigcontext
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MOVL $103, AX // sys_sigreturn
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INT $0x80
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MOVL $0xf1, 0xf1 // crash
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RET
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// int32 tfork(void *param, uintptr psize, M *mp, G *gp, void (*fn)(void));
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TEXT runtime·tfork(SB),7,$12
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// Copy mp, gp and fn from the parent stack onto the child stack.
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MOVL params+4(FP), AX
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MOVL 8(AX), CX // tf_stack
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SUBL $16, CX
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MOVL CX, 8(AX)
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MOVL mm+12(FP), SI
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MOVL SI, 0(CX)
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MOVL gg+16(FP), SI
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MOVL SI, 4(CX)
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MOVL fn+20(FP), SI
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MOVL SI, 8(CX)
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MOVL $1234, 12(CX)
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MOVL $0, 0(SP) // syscall gap
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MOVL params+4(FP), AX
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MOVL AX, 4(SP) // arg 1 - param
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MOVL psize+8(FP), AX
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MOVL AX, 8(SP) // arg 2 - psize
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MOVL $8, AX // sys___tfork
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INT $0x80
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// Return if tfork syscall failed.
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JCC 5(PC)
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NEGL AX
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MOVL ret+0(FP), DX
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MOVL AX, 0(DX)
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RET
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// In parent, return.
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CMPL AX, $0
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JEQ 4(PC)
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MOVL ret+0(FP), DX
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MOVL AX, 0(DX)
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RET
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// Paranoia: check that SP is as we expect.
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MOVL 12(SP), BP
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CMPL BP, $1234
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JEQ 2(PC)
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INT $3
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// Reload registers.
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MOVL 0(SP), BX // m
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MOVL 4(SP), DX // g
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MOVL 8(SP), SI // fn
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// Set FS to point at m->tls.
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LEAL m_tls(BX), BP
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PUSHAL // save registers
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PUSHL BP
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CALL runtime·settls(SB)
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POPL AX
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POPAL
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// Now segment is established. Initialize m, g.
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get_tls(AX)
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MOVL DX, g(AX)
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MOVL BX, m(AX)
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CALL runtime·stackcheck(SB) // smashes AX, CX
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MOVL 0(DX), DX // paranoia; check they are not nil
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MOVL 0(BX), BX
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// More paranoia; check that stack splitting code works.
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PUSHAL
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CALL runtime·emptyfunc(SB)
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POPAL
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// Call fn.
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CALL SI
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CALL runtime·exit1(SB)
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MOVL $0x1234, 0x1005
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RET
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TEXT runtime·sigaltstack(SB),7,$-8
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MOVL $288, AX // sys_sigaltstack
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MOVL new+4(SP), BX
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MOVL old+8(SP), CX
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INT $0x80
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CMPL AX, $0xfffff001
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JLS 2(PC)
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INT $3
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RET
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TEXT runtime·setldt(SB),7,$4
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// Under OpenBSD we set the GS base instead of messing with the LDT.
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MOVL tls0+4(FP), AX
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MOVL AX, 0(SP)
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CALL runtime·settls(SB)
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RET
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TEXT runtime·settls(SB),7,$8
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// adjust for ELF: wants to use -8(GS) and -4(GS) for g and m
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MOVL tlsbase+0(FP), CX
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ADDL $8, CX
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MOVL $0, 0(SP) // syscall gap
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MOVL CX, 4(SP) // arg 1 - tcb
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MOVL $329, AX // sys___set_tcb
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INT $0x80
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JCC 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·osyield(SB),7,$-4
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MOVL $298, AX // sys_sched_yield
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INT $0x80
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RET
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TEXT runtime·thrsleep(SB),7,$-4
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MOVL $300, AX // sys___thrsleep
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INT $0x80
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RET
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TEXT runtime·thrwakeup(SB),7,$-4
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MOVL $301, AX // sys___thrwakeup
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INT $0x80
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RET
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TEXT runtime·sysctl(SB),7,$28
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LEAL arg0+0(FP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL // arg 1 - name
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MOVSL // arg 2 - namelen
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MOVSL // arg 3 - oldp
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MOVSL // arg 4 - oldlenp
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MOVSL // arg 5 - newp
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MOVSL // arg 6 - newlen
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MOVL $202, AX // sys___sysctl
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INT $0x80
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JCC 3(PC)
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NEGL AX
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RET
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MOVL $0, AX
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RET
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// int32 runtime·kqueue(void);
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TEXT runtime·kqueue(SB),7,$0
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MOVL $362, AX
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INT $0x80
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JAE 2(PC)
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NEGL AX
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RET
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// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout);
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TEXT runtime·kevent(SB),7,$0
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MOVL $363, AX
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INT $0x80
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JAE 2(PC)
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NEGL AX
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RET
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// int32 runtime·closeonexec(int32 fd);
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TEXT runtime·closeonexec(SB),7,$32
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MOVL $92, AX // fcntl
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// 0(SP) is where the caller PC would be; kernel skips it
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MOVL fd+0(FP), BX
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MOVL BX, 4(SP) // fd
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MOVL $2, 8(SP) // F_SETFD
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MOVL $1, 12(SP) // FD_CLOEXEC
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INT $0x80
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JAE 2(PC)
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NEGL AX
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RET
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GLOBL runtime·tlsoffset(SB),$4
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