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go/go/efa061d9f5d52846dfc3dda40eaf8eccfeeae8d2/./src/runtime/sys_openbsd_amd64.s
blob: 38ac38d9bf1824fb35ec0e489baf1d3c735e76a8 [file]
// 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 "go_asm.h"
#include "go_tls.h"
#include "textflag.h"
#define CLOCK_MONOTONIC $3
// int32 tfork(void *param, uintptr psize, M *mp, G *gp, void (*fn)(void));
TEXT runtime·tfork(SB),NOSPLIT,$32
// Copy mp, gp and fn off parent stack for use by child.
MOVQ mm+16(FP), R8
MOVQ gg+24(FP), R9
MOVQ fn+32(FP), R12
MOVQ param+0(FP), DI
MOVQ psize+8(FP), SI
MOVL $8, AX // sys___tfork
SYSCALL
// Return if tfork syscall failed.
JCC 4(PC)
NEGQ AX
MOVL AX, ret+40(FP)
RET
// In parent, return.
CMPL AX, $0
JEQ 3(PC)
MOVL AX, ret+40(FP)
RET
// 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, g_m(R9)
MOVQ R9, g(CX)
CALL runtime·stackcheck(SB)
// Call fn
CALL R12
// It shouldn't return. If it does, exit
MOVQ $0, DI // arg 1 - notdead
MOVL $302, AX // sys___threxit
SYSCALL
JMP -3(PC) // keep exiting
TEXT runtime·osyield(SB),NOSPLIT,$0
MOVL $298, AX // sys_sched_yield
SYSCALL
RET
TEXT runtime·thrsleep(SB),NOSPLIT,$0
MOVQ ident+0(FP), DI // arg 1 - ident
MOVL clock_id+8(FP), SI // arg 2 - clock_id
MOVQ tsp+16(FP), DX // arg 3 - tp
MOVQ lock+24(FP), R10 // arg 4 - lock
MOVQ abort+32(FP), R8 // arg 5 - abort
MOVL $94, AX // sys___thrsleep
SYSCALL
MOVL AX, ret+40(FP)
RET
TEXT runtime·thrwakeup(SB),NOSPLIT,$0
MOVQ ident+0(FP), DI // arg 1 - ident
MOVL n+8(FP), SI // arg 2 - n
MOVL $301, AX // sys___thrwakeup
SYSCALL
MOVL AX, ret+16(FP)
RET
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),NOSPLIT,$-8
MOVL code+0(FP), DI // arg 1 - exit status
MOVL $1, AX // sys_exit
SYSCALL
MOVL $0xf1, 0xf1 // crash
RET
// func exitThread(wait *uint32)
TEXT runtime·exitThread(SB),NOSPLIT,$0-8
MOVQ wait+0(FP), DI // arg 1 - notdead
MOVL $302, AX // sys___threxit
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)
MOVL $-1, AX
MOVL AX, ret+24(FP)
RET
TEXT runtime·write(SB),NOSPLIT,$-8
MOVQ fd+0(FP), DI // arg 1 - fd
MOVQ p+8(FP), SI // arg 2 - buf
MOVL n+16(FP), DX // arg 3 - nbyte
MOVL $4, AX // sys_write
SYSCALL
JCC 2(PC)
MOVL $-1, AX
MOVL AX, ret+24(FP)
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 $91, AX // sys_nanosleep
SYSCALL
RET
TEXT runtime·raise(SB),NOSPLIT,$16
MOVL $299, AX // sys_getthrid
SYSCALL
MOVQ AX, DI // arg 1 - tid
MOVL sig+0(FP), SI // arg 2 - signum
MOVQ $0, DX // arg 3 - tcb
MOVL $119, AX // sys_thrkill
SYSCALL
RET
TEXT runtime·raiseproc(SB),NOSPLIT,$16
MOVL $20, AX // sys_getpid
SYSCALL
MOVQ AX, DI // arg 1 - pid
MOVL sig+0(FP), SI // arg 2 - signum
MOVL $122, AX // sys_kill
SYSCALL
RET
TEXT runtime·setitimer(SB),NOSPLIT,$-8
MOVL mode+0(FP), DI // arg 1 - which
MOVQ new+8(FP), SI // arg 2 - itv
MOVQ old+16(FP), DX // arg 3 - oitv
MOVL $69, AX // sys_setitimer
SYSCALL
RET
// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB), NOSPLIT, $32
MOVQ $0, DI // arg 1 - clock_id
LEAQ 8(SP), SI // arg 2 - tp
MOVL $87, AX // sys_clock_gettime
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·nanotime(SB),NOSPLIT,$24
MOVQ CLOCK_MONOTONIC, DI // arg 1 - clock_id
LEAQ 8(SP), SI // arg 2 - tp
MOVL $87, AX // sys_clock_gettime
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 - signum
MOVQ new+8(FP), SI // arg 2 - nsa
MOVQ old+16(FP), DX // arg 3 - osa
MOVL $46, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·obsdsigprocmask(SB),NOSPLIT,$0
MOVL how+0(FP), DI // arg 1 - how
MOVL new+4(FP), SI // arg 2 - set
MOVL $48, AX // sys_sigprocmask
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
MOVL AX, ret+8(FP)
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
TEXT runtime·sigtramp(SB),NOSPLIT,$72
// Save callee-saved C registers, since the caller may be a C signal handler.
MOVQ BX, bx-8(SP)
MOVQ BP, bp-16(SP) // save in case GOEXPERIMENT=noframepointer is set
MOVQ R12, r12-24(SP)
MOVQ R13, r13-32(SP)
MOVQ R14, r14-40(SP)
MOVQ R15, r15-48(SP)
// We don't save mxcsr or the x87 control word because sigtrampgo doesn't
// modify them.
MOVQ DX, ctx-56(SP)
MOVQ SI, info-64(SP)
MOVQ DI, signum-72(SP)
CALL runtime·sigtrampgo(SB)
MOVQ r15-48(SP), R15
MOVQ r14-40(SP), R14
MOVQ r13-32(SP), R13
MOVQ r12-24(SP), R12
MOVQ bp-16(SP), BP
MOVQ bx-8(SP), BX
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 // sys_munmap
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·madvise(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 - addr
MOVQ n+8(FP), SI // arg 2 - len
MOVL flags+16(FP), DX // arg 3 - behav
MOVQ $75, AX // sys_madvise
SYSCALL
// ignore failure - maybe pages are locked
RET
TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
MOVQ new+0(FP), DI // arg 1 - nss
MOVQ old+8(FP), SI // arg 2 - oss
MOVQ $288, AX // sys_sigaltstack
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
// set tls base to DI
TEXT runtime·settls(SB),NOSPLIT,$0
// adjust for ELF: wants to use -8(FS) for g
ADDQ $8, DI
MOVQ $329, AX // sys___settcb
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
// int32 runtime·kqueue(void);
TEXT runtime·kqueue(SB),NOSPLIT,$0
MOVQ $0, DI
MOVQ $0, SI
MOVQ $0, DX
MOVL $269, 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 $72, AX
SYSCALL
JCC 2(PC)
NEGQ AX
MOVL AX, ret+48(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