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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//
// System calls and other sys.stuff for AMD64, OpenBSD
// /usr/src/sys/kern/syscalls.master for syscall numbers.
//
#include "amd64/asm.h"
// int64 rfork_thread(int32 flags, void *stack, M *m, G *g, void (*fn)(void));
TEXT runtime·rfork_thread(SB),7,$0
MOVL flags+8(SP), DI
MOVQ stack+16(SP), SI
// Copy m, g, fn off parent stack for use by child.
MOVQ mm+24(SP), R8
MOVQ gg+32(SP), R9
MOVQ fn+40(SP), R12
MOVL $251, AX // sys_rfork
SYSCALL
// Return if rfork syscall failed
JCC 3(PC)
NEGL AX
RET
// In parent, return.
CMPL AX, $0
JEQ 2(PC)
RET
// In child, on new stack.
MOVQ SI, SP
// Initialize m->procid to thread ID
MOVL $299, AX // sys_getthrid
SYSCALL
MOVQ AX, m_procid(R8)
// Set FS to point at m->tls.
LEAQ m_tls(R8), DI
CALL runtime·settls(SB)
// In child, set up new stack
get_tls(CX)
MOVQ R8, m(CX)
MOVQ R9, g(CX)
CALL runtime·stackcheck(SB)
// Call fn
CALL R12
// It shouldn't return. If it does, exit
MOVL $302, AX // sys_threxit
SYSCALL
JMP -3(PC) // keep exiting
TEXT runtime·sys_sched_yield(SB),7,$0
MOVL $298, AX
SYSCALL
RET
TEXT runtime·sys_thrsleep(SB),7,$0
MOVQ 8(SP), DI
MOVL 16(SP), SI
MOVQ 24(SP), DX
MOVQ 32(SP), R10
MOVL $300, AX
SYSCALL
RET
TEXT runtime·sys_thrwakeup(SB),7,$0
MOVQ 8(SP), DI
MOVL 16(SP), SI
MOVL $301, AX
SYSCALL
RET
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),7,$-8
MOVL 8(SP), DI // arg 1 - exit status
MOVL $1, AX // sys_exit
SYSCALL
CALL runtime·notok(SB)
RET
TEXT runtime·exit1(SB),7,$-8
MOVL $302, AX // sys_threxit
SYSCALL
CALL runtime·notok(SB)
RET
TEXT runtime·write(SB),7,$-8
MOVL 8(SP), DI // arg 1 - fd
MOVQ 16(SP), SI // arg 2 - buf
MOVL 24(SP), DX // arg 3 - nbyte
MOVL $4, AX // sys_write
SYSCALL
RET
TEXT runtime·raisesigpipe(SB),7,$16
MOVL $299, AX // sys_getthrid
SYSCALL
MOVQ AX, DI // arg 1 - pid
MOVQ $13, SI // arg 2 - signum == SIGPIPE
MOVL $37, AX // sys_kill
SYSCALL
RET
TEXT runtime·setitimer(SB),7,$-8
MOVL 8(SP), DI // arg 1 - which
MOVQ 16(SP), SI // arg 2 - itv
MOVQ 24(SP), DX // arg 3 - oitv
MOVL $83, AX // sys_setitimer
SYSCALL
RET
TEXT runtime·gettime(SB),7,$32
LEAQ 8(SP), DI // arg 1 - tp
MOVQ $0, SI // arg 2 - tzp
MOVL $116, AX // sys_gettimeofday
SYSCALL
MOVQ 8(SP), BX // sec
MOVQ sec+0(FP), DI
MOVQ BX, (DI)
MOVL 16(SP), BX // usec
MOVQ usec+8(FP), DI
MOVL BX, (DI)
RET
TEXT runtime·sigaction(SB),7,$-8
MOVL 8(SP), DI // arg 1 - signum
MOVQ 16(SP), SI // arg 2 - nsa
MOVQ 24(SP), DX // arg 3 - osa
MOVL $46, AX
SYSCALL
JCC 2(PC)
CALL runtime·notok(SB)
RET
TEXT runtime·sigtramp(SB),7,$64
get_tls(BX)
// save g
MOVQ g(BX), R10
MOVQ R10, 40(SP)
// g = m->signal
MOVQ m(BX), BP
MOVQ m_gsignal(BP), BP
MOVQ BP, g(BX)
MOVQ DI, 0(SP)
MOVQ SI, 8(SP)
MOVQ DX, 16(SP)
MOVQ R10, 24(SP)
CALL runtime·sighandler(SB)
// restore g
get_tls(BX)
MOVQ 40(SP), R10
MOVQ R10, g(BX)
RET
TEXT runtime·mmap(SB),7,$0
MOVQ 8(SP), DI // arg 1 - addr
MOVQ 16(SP), SI // arg 2 - len
MOVL 24(SP), DX // arg 3 - prot
MOVL 28(SP), R10 // arg 4 - flags
MOVL 32(SP), R8 // arg 5 - fd
MOVQ 36(SP), R9
SUBQ $16, SP
MOVQ R9, 8(SP) // arg 7 - offset (passed on stack)
MOVQ $0, R9 // arg 6 - pad
MOVL $197, AX
SYSCALL
JCC 2(PC)
NEGL AX
ADDQ $16, SP
RET
TEXT runtime·munmap(SB),7,$0
MOVQ 8(SP), DI // arg 1 - addr
MOVQ 16(SP), SI // arg 2 - len
MOVL $73, AX // sys_munmap
SYSCALL
JCC 2(PC)
CALL runtime·notok(SB)
RET
TEXT runtime·notok(SB),7,$-8
MOVL $0xf1, BP
MOVQ BP, (BP)
RET
TEXT runtime·sigaltstack(SB),7,$-8
MOVQ new+8(SP), DI // arg 1 - nss
MOVQ old+16(SP), SI // arg 2 - oss
MOVQ $288, AX // sys_sigaltstack
SYSCALL
JCC 2(PC)
CALL runtime·notok(SB)
RET
// set tls base to DI
TEXT runtime·settls(SB),7,$8
// adjust for ELF: wants to use -16(FS) and -8(FS) for g and m
ADDQ $16, DI
MOVQ DI, 0(SP)
MOVQ SP, SI
MOVQ $12, DI // AMD64_SET_FSBASE (machine/sysarch.h)
MOVQ $165, AX // sys_sysarch
SYSCALL
JCC 2(PC)
CALL runtime·notok(SB)
RET
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