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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, Linux
//
#include "amd64/asm.h"
TEXT runtime·exit(SB),7,$0-8
MOVL 8(SP), DI
MOVL $231, AX // exitgroup - force all os threads to exit
SYSCALL
RET
TEXT runtime·exit1(SB),7,$0-8
MOVL 8(SP), DI
MOVL $60, AX // exit - exit the current os thread
SYSCALL
RET
TEXT runtime·open(SB),7,$0-16
MOVQ 8(SP), DI
MOVL 16(SP), SI
MOVL 20(SP), DX
MOVL $2, AX // syscall entry
SYSCALL
RET
TEXT runtime·write(SB),7,$0-24
MOVL 8(SP), DI
MOVQ 16(SP), SI
MOVL 24(SP), DX
MOVL $1, AX // syscall entry
SYSCALL
RET
TEXT runtime·raisesigpipe(SB),7,$12
MOVL $186, AX // syscall - gettid
SYSCALL
MOVL AX, DI // arg 1 tid
MOVL $13, SI // arg 2 SIGPIPE
MOVL $200, AX // syscall - tkill
SYSCALL
RET
TEXT runtime·setitimer(SB),7,$0-24
MOVL 8(SP), DI
MOVQ 16(SP), SI
MOVQ 24(SP), DX
MOVL $38, AX // syscall entry
SYSCALL
RET
TEXT runtime·gettime(SB), 7, $32
LEAQ 8(SP), DI
MOVQ $0, SI
MOVQ $0xffffffffff600000, AX
CALL AX
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·rt_sigaction(SB),7,$0-32
MOVL 8(SP), DI
MOVQ 16(SP), SI
MOVQ 24(SP), DX
MOVQ 32(SP), R10
MOVL $13, AX // syscall entry
SYSCALL
RET
TEXT runtime·sigtramp(SB),7,$64
get_tls(BX)
// save g
MOVQ g(BX), R10
MOVQ R10, 40(SP)
// g = m->gsignal
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·sigignore(SB),7,$0
RET
TEXT runtime·sigreturn(SB),7,$0
MOVL $15, AX // rt_sigreturn
SYSCALL
INT $3 // not reached
TEXT runtime·mmap(SB),7,$0
MOVQ 8(SP), DI
MOVQ $0, SI
MOVQ 16(SP), SI
MOVL 24(SP), DX
MOVL 28(SP), R10
MOVL 32(SP), R8
MOVL 36(SP), R9
MOVL $9, AX // mmap
SYSCALL
CMPQ AX, $0xfffffffffffff001
JLS 3(PC)
NOTQ AX
INCQ AX
RET
TEXT runtime·munmap(SB),7,$0
MOVQ 8(SP), DI
MOVQ 16(SP), SI
MOVQ $11, AX // munmap
SYSCALL
CMPQ AX, $0xfffffffffffff001
JLS 2(PC)
CALL runtime·notok(SB)
RET
TEXT runtime·notok(SB),7,$0
MOVQ $0xf1, BP
MOVQ BP, (BP)
RET
// int64 futex(int32 *uaddr, int32 op, int32 val,
// struct timespec *timeout, int32 *uaddr2, int32 val2);
TEXT runtime·futex(SB),7,$0
MOVQ 8(SP), DI
MOVL 16(SP), SI
MOVL 20(SP), DX
MOVQ 24(SP), R10
MOVQ 32(SP), R8
MOVL 40(SP), R9
MOVL $202, AX
SYSCALL
RET
// int64 clone(int32 flags, void *stack, M *m, G *g, void (*fn)(void));
TEXT runtime·clone(SB),7,$0
MOVL flags+8(SP), DI
MOVQ stack+16(SP), SI
// Copy m, g, fn off parent stack for use by child.
// Careful: Linux system call clobbers CX and R11.
MOVQ mm+24(SP), R8
MOVQ gg+32(SP), R9
MOVQ fn+40(SP), R12
MOVL $56, AX
SYSCALL
// In parent, return.
CMPQ AX, $0
JEQ 2(PC)
RET
// In child, on new stack.
MOVQ SI, SP
// Initialize m->procid to Linux tid
MOVL $186, AX // gettid
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 $111, DI
MOVL $60, AX
SYSCALL
JMP -3(PC) // keep exiting
TEXT runtime·sigaltstack(SB),7,$-8
MOVQ new+8(SP), DI
MOVQ old+16(SP), SI
MOVQ $131, AX
SYSCALL
CMPQ AX, $0xfffffffffffff001
JLS 2(PC)
CALL runtime·notok(SB)
RET
// set tls base to DI
TEXT runtime·settls(SB),7,$32
ADDQ $16, DI // ELF wants to use -16(FS), -8(FS)
MOVQ DI, SI
MOVQ $0x1002, DI // ARCH_SET_FS
MOVQ $158, AX // arch_prctl
SYSCALL
CMPQ AX, $0xfffffffffffff001
JLS 2(PC)
CALL runtime·notok(SB)
RET
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