mirror of
https://github.com/golang/go
synced 2024-11-19 12:54:45 -07:00
88129f0cb2
Fixes #14327 Much of the code is based on the linux/amd64 code that implements these build modes, and code is shared where possible. Change-Id: Ia510f2023768c0edbc863aebc585929ec593b332 Reviewed-on: https://go-review.googlesource.com/93875 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
463 lines
9.9 KiB
ArmAsm
463 lines
9.9 KiB
ArmAsm
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//
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// System calls and other sys.stuff for AMD64, FreeBSD
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// /usr/src/sys/kern/syscalls.master for syscall numbers.
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//
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#include "go_asm.h"
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#include "go_tls.h"
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#include "textflag.h"
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TEXT runtime·sys_umtx_op(SB),NOSPLIT,$0
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MOVQ addr+0(FP), DI
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MOVL mode+8(FP), SI
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MOVL val+12(FP), DX
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MOVQ uaddr1+16(FP), R10
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MOVQ ut+24(FP), R8
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MOVL $454, AX
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SYSCALL
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MOVL AX, ret+32(FP)
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RET
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TEXT runtime·thr_new(SB),NOSPLIT,$0
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MOVQ param+0(FP), DI
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MOVL size+8(FP), SI
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MOVL $455, AX
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SYSCALL
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MOVL AX, ret+16(FP)
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RET
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TEXT runtime·thr_start(SB),NOSPLIT,$0
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MOVQ DI, R13 // m
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// set up FS to point at m->tls
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LEAQ m_tls(R13), DI
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CALL runtime·settls(SB) // smashes DI
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// set up m, g
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get_tls(CX)
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MOVQ m_g0(R13), DI
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MOVQ R13, g_m(DI)
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MOVQ DI, g(CX)
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CALL runtime·stackcheck(SB)
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CALL runtime·mstart(SB)
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MOVQ 0, AX // crash (not reached)
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// Exit the entire program (like C exit)
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TEXT runtime·exit(SB),NOSPLIT,$-8
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MOVL code+0(FP), DI // arg 1 exit status
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MOVL $1, AX
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SYSCALL
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MOVL $0xf1, 0xf1 // crash
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RET
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// func exitThread(wait *uint32)
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TEXT runtime·exitThread(SB),NOSPLIT,$0-8
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MOVQ wait+0(FP), AX
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// We're done using the stack.
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MOVL $0, (AX)
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MOVL $0, DI // arg 1 long *state
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MOVL $431, AX // thr_exit
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SYSCALL
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MOVL $0xf1, 0xf1 // crash
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JMP 0(PC)
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TEXT runtime·open(SB),NOSPLIT,$-8
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MOVQ name+0(FP), DI // arg 1 pathname
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MOVL mode+8(FP), SI // arg 2 flags
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MOVL perm+12(FP), DX // arg 3 mode
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MOVL $5, AX
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SYSCALL
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JCC 2(PC)
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MOVL $-1, AX
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MOVL AX, ret+16(FP)
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RET
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TEXT runtime·closefd(SB),NOSPLIT,$-8
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MOVL fd+0(FP), DI // arg 1 fd
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MOVL $6, AX
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SYSCALL
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JCC 2(PC)
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MOVL $-1, AX
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MOVL AX, ret+8(FP)
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RET
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TEXT runtime·read(SB),NOSPLIT,$-8
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MOVL fd+0(FP), DI // arg 1 fd
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MOVQ p+8(FP), SI // arg 2 buf
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MOVL n+16(FP), DX // arg 3 count
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MOVL $3, AX
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SYSCALL
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JCC 2(PC)
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MOVL $-1, AX
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MOVL AX, ret+24(FP)
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RET
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TEXT runtime·write(SB),NOSPLIT,$-8
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MOVQ fd+0(FP), DI // arg 1 fd
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MOVQ p+8(FP), SI // arg 2 buf
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MOVL n+16(FP), DX // arg 3 count
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MOVL $4, AX
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SYSCALL
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JCC 2(PC)
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MOVL $-1, AX
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MOVL AX, ret+24(FP)
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RET
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TEXT runtime·raise(SB),NOSPLIT,$16
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// thr_self(&8(SP))
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LEAQ 8(SP), DI // arg 1 &8(SP)
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MOVL $432, AX
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SYSCALL
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// thr_kill(self, SIGPIPE)
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MOVQ 8(SP), DI // arg 1 id
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MOVL sig+0(FP), SI // arg 2
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MOVL $433, AX
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SYSCALL
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RET
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TEXT runtime·raiseproc(SB),NOSPLIT,$0
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// getpid
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MOVL $20, AX
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SYSCALL
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// kill(self, sig)
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MOVQ AX, DI // arg 1 pid
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MOVL sig+0(FP), SI // arg 2 sig
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MOVL $37, AX
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SYSCALL
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RET
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TEXT runtime·setitimer(SB), NOSPLIT, $-8
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MOVL mode+0(FP), DI
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MOVQ new+8(FP), SI
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MOVQ old+16(FP), DX
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MOVL $83, AX
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SYSCALL
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RET
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// func walltime() (sec int64, nsec int32)
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TEXT runtime·walltime(SB), NOSPLIT, $32
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MOVL $232, AX // clock_gettime
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MOVQ $0, DI // CLOCK_REALTIME
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LEAQ 8(SP), SI
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SYSCALL
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MOVQ 8(SP), AX // sec
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MOVQ 16(SP), DX // nsec
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// sec is in AX, nsec in DX
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MOVQ AX, sec+0(FP)
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MOVL DX, nsec+8(FP)
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RET
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TEXT runtime·nanotime(SB), NOSPLIT, $32
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MOVL $232, AX
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// We can use CLOCK_MONOTONIC_FAST here when we drop
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// support for FreeBSD 8-STABLE.
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MOVQ $4, DI // CLOCK_MONOTONIC
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LEAQ 8(SP), SI
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SYSCALL
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MOVQ 8(SP), AX // sec
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MOVQ 16(SP), DX // nsec
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// sec is in AX, nsec in DX
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// return nsec in AX
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IMULQ $1000000000, AX
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ADDQ DX, AX
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MOVQ AX, ret+0(FP)
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RET
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TEXT runtime·asmSigaction(SB),NOSPLIT,$0
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MOVQ sig+0(FP), DI // arg 1 sig
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MOVQ new+8(FP), SI // arg 2 act
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MOVQ old+16(FP), DX // arg 3 oact
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MOVL $416, AX
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SYSCALL
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JCC 2(PC)
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MOVL $-1, AX
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MOVL AX, ret+24(FP)
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RET
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TEXT runtime·callCgoSigaction(SB),NOSPLIT,$16
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MOVQ sig+0(FP), DI // arg 1 sig
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MOVQ new+8(FP), SI // arg 2 act
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MOVQ old+16(FP), DX // arg 3 oact
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MOVQ _cgo_sigaction(SB), AX
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MOVQ SP, BX // callee-saved
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ANDQ $~15, SP // alignment as per amd64 psABI
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CALL AX
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MOVQ BX, SP
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MOVL AX, ret+24(FP)
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RET
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TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
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MOVQ fn+0(FP), AX
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MOVL sig+8(FP), DI
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MOVQ info+16(FP), SI
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MOVQ ctx+24(FP), DX
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PUSHQ BP
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MOVQ SP, BP
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ANDQ $~15, SP // alignment for x86_64 ABI
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CALL AX
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MOVQ BP, SP
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POPQ BP
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RET
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TEXT runtime·sigtramp(SB),NOSPLIT,$72
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// Save callee-saved C registers, since the caller may be a C signal handler.
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MOVQ BX, bx-8(SP)
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MOVQ BP, bp-16(SP) // save in case GOEXPERIMENT=noframepointer is set
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MOVQ R12, r12-24(SP)
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MOVQ R13, r13-32(SP)
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MOVQ R14, r14-40(SP)
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MOVQ R15, r15-48(SP)
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// We don't save mxcsr or the x87 control word because sigtrampgo doesn't
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// modify them.
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MOVQ DX, ctx-56(SP)
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MOVQ SI, info-64(SP)
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MOVQ DI, signum-72(SP)
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CALL runtime·sigtrampgo(SB)
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MOVQ r15-48(SP), R15
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MOVQ r14-40(SP), R14
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MOVQ r13-32(SP), R13
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MOVQ r12-24(SP), R12
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MOVQ bp-16(SP), BP
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MOVQ bx-8(SP), BX
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RET
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// Used instead of sigtramp in programs that use cgo.
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// Arguments from kernel are in DI, SI, DX.
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TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0
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// If no traceback function, do usual sigtramp.
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MOVQ runtime·cgoTraceback(SB), AX
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TESTQ AX, AX
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JZ sigtramp
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// If no traceback support function, which means that
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// runtime/cgo was not linked in, do usual sigtramp.
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MOVQ _cgo_callers(SB), AX
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TESTQ AX, AX
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JZ sigtramp
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// Figure out if we are currently in a cgo call.
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// If not, just do usual sigtramp.
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get_tls(CX)
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MOVQ g(CX),AX
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TESTQ AX, AX
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JZ sigtrampnog // g == nil
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MOVQ g_m(AX), AX
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TESTQ AX, AX
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JZ sigtramp // g.m == nil
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MOVL m_ncgo(AX), CX
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TESTL CX, CX
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JZ sigtramp // g.m.ncgo == 0
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MOVQ m_curg(AX), CX
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TESTQ CX, CX
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JZ sigtramp // g.m.curg == nil
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MOVQ g_syscallsp(CX), CX
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TESTQ CX, CX
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JZ sigtramp // g.m.curg.syscallsp == 0
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MOVQ m_cgoCallers(AX), R8
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TESTQ R8, R8
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JZ sigtramp // g.m.cgoCallers == nil
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MOVL m_cgoCallersUse(AX), CX
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TESTL CX, CX
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JNZ sigtramp // g.m.cgoCallersUse != 0
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// Jump to a function in runtime/cgo.
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// That function, written in C, will call the user's traceback
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// function with proper unwind info, and will then call back here.
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// The first three arguments, and the fifth, are already in registers.
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// Set the two remaining arguments now.
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MOVQ runtime·cgoTraceback(SB), CX
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MOVQ $runtime·sigtramp(SB), R9
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MOVQ _cgo_callers(SB), AX
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JMP AX
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sigtramp:
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JMP runtime·sigtramp(SB)
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sigtrampnog:
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// Signal arrived on a non-Go thread. If this is SIGPROF, get a
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// stack trace.
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CMPL DI, $27 // 27 == SIGPROF
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JNZ sigtramp
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// Lock sigprofCallersUse.
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MOVL $0, AX
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MOVL $1, CX
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MOVQ $runtime·sigprofCallersUse(SB), R11
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LOCK
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CMPXCHGL CX, 0(R11)
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JNZ sigtramp // Skip stack trace if already locked.
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// Jump to the traceback function in runtime/cgo.
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// It will call back to sigprofNonGo, which will ignore the
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// arguments passed in registers.
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// First three arguments to traceback function are in registers already.
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MOVQ runtime·cgoTraceback(SB), CX
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MOVQ $runtime·sigprofCallers(SB), R8
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MOVQ $runtime·sigprofNonGo(SB), R9
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MOVQ _cgo_callers(SB), AX
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JMP AX
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TEXT runtime·mmap(SB),NOSPLIT,$0
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MOVQ addr+0(FP), DI // arg 1 addr
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MOVQ n+8(FP), SI // arg 2 len
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MOVL prot+16(FP), DX // arg 3 prot
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MOVL flags+20(FP), R10 // arg 4 flags
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MOVL fd+24(FP), R8 // arg 5 fid
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MOVL off+28(FP), R9 // arg 6 offset
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MOVL $477, AX
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SYSCALL
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JCC ok
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MOVQ $0, p+32(FP)
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MOVQ AX, err+40(FP)
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RET
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ok:
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MOVQ AX, p+32(FP)
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MOVQ $0, err+40(FP)
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RET
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TEXT runtime·munmap(SB),NOSPLIT,$0
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MOVQ addr+0(FP), DI // arg 1 addr
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MOVQ n+8(FP), SI // arg 2 len
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MOVL $73, AX
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SYSCALL
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JCC 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·madvise(SB),NOSPLIT,$0
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MOVQ addr+0(FP), DI
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MOVQ n+8(FP), SI
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MOVL flags+16(FP), DX
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MOVQ $75, AX // madvise
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SYSCALL
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// ignore failure - maybe pages are locked
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RET
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TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
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MOVQ new+0(FP), DI
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MOVQ old+8(FP), SI
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MOVQ $53, AX
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SYSCALL
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JCC 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·usleep(SB),NOSPLIT,$16
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MOVL $0, DX
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MOVL usec+0(FP), AX
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MOVL $1000000, CX
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DIVL CX
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MOVQ AX, 0(SP) // tv_sec
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MOVL $1000, AX
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MULL DX
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MOVQ AX, 8(SP) // tv_nsec
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MOVQ SP, DI // arg 1 - rqtp
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MOVQ $0, SI // arg 2 - rmtp
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MOVL $240, AX // sys_nanosleep
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SYSCALL
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RET
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// set tls base to DI
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TEXT runtime·settls(SB),NOSPLIT,$8
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ADDQ $8, DI // adjust for ELF: wants to use -8(FS) for g and m
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MOVQ DI, 0(SP)
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MOVQ SP, SI
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MOVQ $129, DI // AMD64_SET_FSBASE
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MOVQ $165, AX // sysarch
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SYSCALL
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JCC 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·sysctl(SB),NOSPLIT,$0
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MOVQ mib+0(FP), DI // arg 1 - name
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MOVL miblen+8(FP), SI // arg 2 - namelen
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MOVQ out+16(FP), DX // arg 3 - oldp
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MOVQ size+24(FP), R10 // arg 4 - oldlenp
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MOVQ dst+32(FP), R8 // arg 5 - newp
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MOVQ ndst+40(FP), R9 // arg 6 - newlen
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MOVQ $202, AX // sys___sysctl
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SYSCALL
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JCC 4(PC)
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NEGQ AX
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MOVL AX, ret+48(FP)
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RET
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MOVL $0, AX
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MOVL AX, ret+48(FP)
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RET
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TEXT runtime·osyield(SB),NOSPLIT,$-4
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MOVL $331, AX // sys_sched_yield
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SYSCALL
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RET
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TEXT runtime·sigprocmask(SB),NOSPLIT,$0
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MOVL how+0(FP), DI // arg 1 - how
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MOVQ new+8(FP), SI // arg 2 - set
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MOVQ old+16(FP), DX // arg 3 - oset
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MOVL $340, AX // sys_sigprocmask
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SYSCALL
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JAE 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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// int32 runtime·kqueue(void);
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TEXT runtime·kqueue(SB),NOSPLIT,$0
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MOVQ $0, DI
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MOVQ $0, SI
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MOVQ $0, DX
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MOVL $362, AX
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SYSCALL
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JCC 2(PC)
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NEGQ AX
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MOVL AX, ret+0(FP)
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RET
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// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout);
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TEXT runtime·kevent(SB),NOSPLIT,$0
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MOVL kq+0(FP), DI
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MOVQ ch+8(FP), SI
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MOVL nch+16(FP), DX
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MOVQ ev+24(FP), R10
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MOVL nev+32(FP), R8
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MOVQ ts+40(FP), R9
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MOVL $363, AX
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SYSCALL
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JCC 2(PC)
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NEGQ AX
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MOVL AX, ret+48(FP)
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RET
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// void runtime·closeonexec(int32 fd);
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TEXT runtime·closeonexec(SB),NOSPLIT,$0
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MOVL fd+0(FP), DI // fd
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MOVQ $2, SI // F_SETFD
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MOVQ $1, DX // FD_CLOEXEC
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MOVL $92, AX // fcntl
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SYSCALL
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RET
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// func cpuset_getaffinity(level int, which int, id int64, size int, mask *byte) int32
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TEXT runtime·cpuset_getaffinity(SB), NOSPLIT, $0-44
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MOVQ level+0(FP), DI
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MOVQ which+8(FP), SI
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MOVQ id+16(FP), DX
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MOVQ size+24(FP), R10
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MOVQ mask+32(FP), R8
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MOVL $487, AX
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SYSCALL
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JCC 2(PC)
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NEGQ AX
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MOVL AX, ret+40(FP)
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RET
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