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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, FreeBSD
// /usr/src/sys/kern/syscalls.master for syscall numbers.
//
#include "go_asm.h"
#include "go_tls.h"
#include "textflag.h"
#include "cgo/abi_amd64.h"
TEXT runtime·sys_umtx_sleep(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 - ptr
MOVL val+8(FP), SI // arg 2 - value
MOVL timeout+12(FP), DX // arg 3 - timeout
MOVL $469, AX // umtx_sleep
SYSCALL
JCC 2(PC)
NEGQ AX
MOVL AX, ret+16(FP)
RET
TEXT runtime·sys_umtx_wakeup(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 - ptr
MOVL val+8(FP), SI // arg 2 - count
MOVL $470, AX // umtx_wakeup
SYSCALL
JCC 2(PC)
NEGQ AX
MOVL AX, ret+16(FP)
RET
TEXT runtime·lwp_create(SB),NOSPLIT,$0
MOVQ param+0(FP), DI // arg 1 - params
MOVL $495, AX // lwp_create
SYSCALL
MOVL AX, ret+8(FP)
RET
TEXT runtime·lwp_start(SB),NOSPLIT,$0
MOVQ DI, R13 // m
// set up FS to point at m->tls
LEAQ m_tls(R13), DI
CALL runtime·settls(SB) // smashes DI
// set up m, g
get_tls(CX)
MOVQ m_g0(R13), DI
MOVQ R13, g_m(DI)
MOVQ DI, g(CX)
CALL runtime·stackcheck(SB)
CALL runtime·mstart(SB)
MOVQ 0, AX // crash (not reached)
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),NOSPLIT,$-8
MOVL code+0(FP), DI // arg 1 exit status
MOVL $1, AX
SYSCALL
MOVL $0xf1, 0xf1 // crash
RET
// func exitThread(wait *atomic.Uint32)
TEXT runtime·exitThread(SB),NOSPLIT,$0-8
MOVQ wait+0(FP), AX
// We're done using the stack.
MOVL $0, (AX)
MOVL $0x10000, DI // arg 1 how - EXTEXIT_LWP
MOVL $0, SI // arg 2 status
MOVL $0, DX // arg 3 addr
MOVL $494, AX // extexit
SYSCALL
MOVL $0xf1, 0xf1 // crash
JMP 0(PC)
TEXT runtime·open(SB),NOSPLIT,$-8
MOVQ name+0(FP), DI // arg 1 pathname
MOVL mode+8(FP), SI // arg 2 flags
MOVL perm+12(FP), DX // arg 3 mode
MOVL $5, AX
SYSCALL
JCC 2(PC)
MOVL $-1, AX
MOVL AX, ret+16(FP)
RET
TEXT runtime·closefd(SB),NOSPLIT,$-8
MOVL fd+0(FP), DI // arg 1 fd
MOVL $6, AX
SYSCALL
JCC 2(PC)
MOVL $-1, AX
MOVL AX, ret+8(FP)
RET
TEXT runtime·read(SB),NOSPLIT,$-8
MOVL fd+0(FP), DI // arg 1 fd
MOVQ p+8(FP), SI // arg 2 buf
MOVL n+16(FP), DX // arg 3 count
MOVL $3, AX
SYSCALL
JCC 2(PC)
NEGL AX // caller expects negative errno
MOVL AX, ret+24(FP)
RET
// func pipe2(flags int32) (r, w int32, errno int32)
TEXT runtime·pipe2(SB),NOSPLIT,$0-20
MOVL $0, DI
// dragonfly expects flags as the 2nd argument
MOVL flags+0(FP), SI
MOVL $538, AX
SYSCALL
JCC pipe2ok
MOVL $-1,r+8(FP)
MOVL $-1,w+12(FP)
MOVL AX, errno+16(FP)
RET
pipe2ok:
MOVL AX, r+8(FP)
MOVL DX, w+12(FP)
MOVL $0, errno+16(FP)
RET
TEXT runtime·write1(SB),NOSPLIT,$-8
MOVQ fd+0(FP), DI // arg 1 fd
MOVQ p+8(FP), SI // arg 2 buf
MOVL n+16(FP), DX // arg 3 count
MOVL $4, AX
SYSCALL
JCC 2(PC)
NEGL AX // caller expects negative errno
MOVL AX, ret+24(FP)
RET
TEXT runtime·lwp_gettid(SB),NOSPLIT,$0-4
MOVL $496, AX // lwp_gettid
SYSCALL
MOVL AX, ret+0(FP)
RET
TEXT runtime·lwp_kill(SB),NOSPLIT,$0-16
MOVL pid+0(FP), DI // arg 1 - pid
MOVL tid+4(FP), SI // arg 2 - tid
MOVQ sig+8(FP), DX // arg 3 - signum
MOVL $497, AX // lwp_kill
SYSCALL
RET
TEXT runtime·raiseproc(SB),NOSPLIT,$0
MOVL $20, AX // getpid
SYSCALL
MOVQ AX, DI // arg 1 - pid
MOVL sig+0(FP), SI // arg 2 - signum
MOVL $37, AX // kill
SYSCALL
RET
TEXT runtime·setitimer(SB), NOSPLIT, $-8
MOVL mode+0(FP), DI
MOVQ new+8(FP), SI
MOVQ old+16(FP), DX
MOVL $83, AX
SYSCALL
RET
// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB), NOSPLIT, $32
MOVL $232, AX // clock_gettime
MOVQ $0, DI // CLOCK_REALTIME
LEAQ 8(SP), SI
SYSCALL
MOVQ 8(SP), AX // sec
MOVQ 16(SP), DX // nsec
// sec is in AX, nsec in DX
MOVQ AX, sec+0(FP)
MOVL DX, nsec+8(FP)
RET
TEXT runtime·nanotime1(SB), NOSPLIT, $32
MOVL $232, AX
MOVQ $4, DI // CLOCK_MONOTONIC
LEAQ 8(SP), SI
SYSCALL
MOVQ 8(SP), AX // sec
MOVQ 16(SP), DX // nsec
// sec is in AX, nsec in DX
// return nsec in AX
IMULQ $1000000000, AX
ADDQ DX, AX
MOVQ AX, ret+0(FP)
RET
TEXT runtime·sigaction(SB),NOSPLIT,$-8
MOVL sig+0(FP), DI // arg 1 sig
MOVQ new+8(FP), SI // arg 2 act
MOVQ old+16(FP), DX // arg 3 oact
MOVL $342, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
MOVQ fn+0(FP), AX
MOVL sig+8(FP), DI
MOVQ info+16(FP), SI
MOVQ ctx+24(FP), DX
PUSHQ BP
MOVQ SP, BP
ANDQ $~15, SP // alignment for x86_64 ABI
CALL AX
MOVQ BP, SP
POPQ BP
RET
// Called using C ABI.
TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$0
// Transition from C ABI to Go ABI.
PUSH_REGS_HOST_TO_ABI0()
// Set up ABIInternal environment: g in R14, cleared X15.
get_tls(R12)
MOVQ g(R12), R14
PXOR X15, X15
// Reserve space for spill slots.
NOP SP // disable vet stack checking
ADJSP $24
// Call into the Go signal handler
MOVQ DI, AX // sig
MOVQ SI, BX // info
MOVQ DX, CX // ctx
CALL ·sigtrampgo<ABIInternal>(SB)
ADJSP $-24
POP_REGS_HOST_TO_ABI0()
RET
TEXT runtime·mmap(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 - addr
MOVQ n+8(FP), SI // arg 2 - len
MOVL prot+16(FP), DX // arg 3 - prot
MOVL flags+20(FP), R10 // arg 4 - flags
MOVL fd+24(FP), R8 // arg 5 - fd
MOVL off+28(FP), 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 ok
ADDQ $16, SP
MOVQ $0, p+32(FP)
MOVQ AX, err+40(FP)
RET
ok:
ADDQ $16, SP
MOVQ AX, p+32(FP)
MOVQ $0, err+40(FP)
RET
TEXT runtime·munmap(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 addr
MOVQ n+8(FP), SI // arg 2 len
MOVL $73, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·madvise(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI
MOVQ n+8(FP), SI
MOVL flags+16(FP), DX
MOVQ $75, AX // madvise
SYSCALL
JCC 2(PC)
MOVL $-1, AX
MOVL AX, ret+24(FP)
RET
TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
MOVQ new+0(FP), DI
MOVQ old+8(FP), SI
MOVQ $53, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·usleep(SB),NOSPLIT,$16
MOVL $0, DX
MOVL usec+0(FP), AX
MOVL $1000000, CX
DIVL CX
MOVQ AX, 0(SP) // tv_sec
MOVL $1000, AX
MULL DX
MOVQ AX, 8(SP) // tv_nsec
MOVQ SP, DI // arg 1 - rqtp
MOVQ $0, SI // arg 2 - rmtp
MOVL $240, AX // sys_nanosleep
SYSCALL
RET
// set tls base to DI
TEXT runtime·settls(SB),NOSPLIT,$16
ADDQ $8, DI // adjust for ELF: wants to use -8(FS) for g
MOVQ DI, 0(SP)
MOVQ $16, 8(SP)
MOVQ $0, DI // arg 1 - which
MOVQ SP, SI // arg 2 - tls_info
MOVQ $16, DX // arg 3 - infosize
MOVQ $472, AX // set_tls_area
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sysctl(SB),NOSPLIT,$0
MOVQ mib+0(FP), DI // arg 1 - name
MOVL miblen+8(FP), SI // arg 2 - namelen
MOVQ out+16(FP), DX // arg 3 - oldp
MOVQ size+24(FP), R10 // arg 4 - oldlenp
MOVQ dst+32(FP), R8 // arg 5 - newp
MOVQ ndst+40(FP), R9 // arg 6 - newlen
MOVQ $202, AX // sys___sysctl
SYSCALL
JCC 4(PC)
NEGQ AX
MOVL AX, ret+48(FP)
RET
MOVL $0, AX
MOVL AX, ret+48(FP)
RET
TEXT runtime·osyield(SB),NOSPLIT,$-4
MOVL $331, AX // sys_sched_yield
SYSCALL
RET
TEXT runtime·sigprocmask(SB),NOSPLIT,$0
MOVL how+0(FP), DI // arg 1 - how
MOVQ new+8(FP), SI // arg 2 - set
MOVQ old+16(FP), DX // arg 3 - oset
MOVL $340, AX // sys_sigprocmask
SYSCALL
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
// int32 runtime·kqueue(void);
TEXT runtime·kqueue(SB),NOSPLIT,$0
MOVQ $0, DI
MOVQ $0, SI
MOVQ $0, DX
MOVL $362, AX
SYSCALL
JCC 2(PC)
NEGQ AX
MOVL AX, ret+0(FP)
RET
// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout);
TEXT runtime·kevent(SB),NOSPLIT,$0
MOVL kq+0(FP), DI
MOVQ ch+8(FP), SI
MOVL nch+16(FP), DX
MOVQ ev+24(FP), R10
MOVL nev+32(FP), R8
MOVQ ts+40(FP), R9
MOVL $363, AX
SYSCALL
JCC 2(PC)
NEGQ AX
MOVL AX, ret+48(FP)
RET
// func fcntl(fd, cmd, arg int32) (ret int32, errno int32)
TEXT runtime·fcntl(SB),NOSPLIT,$0
MOVL fd+0(FP), DI // fd
MOVL cmd+4(FP), SI // cmd
MOVL arg+8(FP), DX // arg
MOVL $92, AX // fcntl
SYSCALL
JCC noerr
MOVL $-1, ret+16(FP)
MOVL AX, errno+20(FP)
RET
noerr:
MOVL AX, ret+16(FP)
MOVL $0, errno+20(FP)
RET
// void runtime·closeonexec(int32 fd);
TEXT runtime·closeonexec(SB),NOSPLIT,$0
MOVL fd+0(FP), DI // fd
MOVQ $2, SI // F_SETFD
MOVQ $1, DX // FD_CLOEXEC
MOVL $92, AX // fcntl
SYSCALL
RET
// func issetugid() int32
TEXT runtime·issetugid(SB),NOSPLIT,$0
MOVQ $0, DI
MOVQ $0, SI
MOVQ $0, DX
MOVL $253, AX
SYSCALL
MOVL AX, ret+0(FP)
RET
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