mirror of
https://github.com/golang/go
synced 2024-11-19 15:54:46 -07:00
0e3355903d
See https://golang.org/design/12914-monotonic for details. Fixes #12914. Change-Id: I80edc2e6c012b4ace7161c84cf067d444381a009 Reviewed-on: https://go-review.googlesource.com/36255 Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Caleb Spare <cespare@gmail.com> Reviewed-by: Ian Lance Taylor <iant@golang.org>
374 lines
8.0 KiB
ArmAsm
374 lines
8.0 KiB
ArmAsm
// 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 $0xf1, 0xf1 // crash
|
|
RET
|
|
|
|
TEXT runtime·exit1(SB),NOSPLIT,$-8
|
|
MOVQ $0, DI // arg 1 - notdead
|
|
MOVL $302, AX // sys___threxit
|
|
SYSCALL
|
|
MOVL $0xf1, 0xf1 // crash
|
|
RET
|
|
|
|
TEXT runtime·open(SB),NOSPLIT,$-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
|
|
ADDQ $16, SP
|
|
MOVQ AX, ret+32(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
|