mirror of
https://github.com/golang/go
synced 2024-11-19 15:14:45 -07:00
193088b246
Currently mmap returns an unsafe.Pointer that encodes OS errors as values less than 4096. In practice this is okay, but it borders on being really unsafe: for example, the value has to be checked immediately after return and if stack copying were ever to observe such a value, it would panic. It's also not remotely idiomatic. Fix this by making mmap return a separate pointer value and error, like a normal Go function. Updates #22218. Change-Id: Iefd965095ffc82cc91118872753a5d39d785c3a6 Reviewed-on: https://go-review.googlesource.com/71270 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
380 lines
7.8 KiB
ArmAsm
380 lines
7.8 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, FreeBSD
|
|
// /usr/src/sys/kern/syscalls.master for syscall numbers.
|
|
//
|
|
|
|
#include "go_asm.h"
|
|
#include "go_tls.h"
|
|
#include "textflag.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 *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)
|
|
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 count
|
|
MOVL $4, AX
|
|
SYSCALL
|
|
JCC 2(PC)
|
|
MOVL $-1, AX
|
|
MOVL AX, ret+24(FP)
|
|
RET
|
|
|
|
TEXT runtime·getrlimit(SB),NOSPLIT,$-8
|
|
MOVL kind+0(FP), DI
|
|
MOVQ limit+8(FP), SI
|
|
MOVL $194, AX
|
|
SYSCALL
|
|
MOVL AX, ret+16(FP)
|
|
RET
|
|
|
|
TEXT runtime·raise(SB),NOSPLIT,$16
|
|
MOVL $496, AX // lwp_gettid
|
|
SYSCALL
|
|
MOVQ $-1, DI // arg 1 - pid
|
|
MOVQ AX, SI // arg 2 - tid
|
|
MOVL sig+0(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·nanotime(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
|
|
|
|
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
|
|
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 $75, AX // madvise
|
|
SYSCALL
|
|
// ignore failure - maybe pages are locked
|
|
RET
|
|
|
|
TEXT runtime·sigaltstack(SB),NOSPLIT,$-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
|
|
|
|
// 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
|