mirror of
https://github.com/golang/go
synced 2024-11-19 13:14:42 -07:00
3e804631d9
This is to reduce the delta between dev.cc and dev.garbage to just garbage collector changes.
These are the files that had merge conflicts and have been edited by hand:
malloc.go
mem_linux.go
mgc.go
os1_linux.go
proc1.go
panic1.go
runtime1.go
LGTM=austin
R=austin
CC=golang-codereviews
https://golang.org/cl/174180043
393 lines
7.1 KiB
ArmAsm
393 lines
7.1 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 386, 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,$-4
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MOVL $454, AX
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INT $0x80
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MOVL AX, ret+20(FP)
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RET
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TEXT runtime·thr_new(SB),NOSPLIT,$-4
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MOVL $455, AX
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INT $0x80
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RET
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TEXT runtime·thr_start(SB),NOSPLIT,$0
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MOVL mm+0(FP), AX
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MOVL m_g0(AX), BX
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LEAL m_tls(AX), BP
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MOVL 0(BP), DI
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ADDL $7, DI
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PUSHAL
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PUSHL $32
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PUSHL BP
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PUSHL DI
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CALL runtime·setldt(SB)
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POPL AX
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POPL AX
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POPL AX
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POPAL
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get_tls(CX)
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MOVL BX, g(CX)
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MOVL AX, g_m(BX)
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CALL runtime·stackcheck(SB) // smashes AX
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CALL runtime·mstart(SB)
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MOVL 0, AX // crash (not reached)
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// Exit the entire program (like C exit)
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TEXT runtime·exit(SB),NOSPLIT,$-4
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MOVL $1, AX
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INT $0x80
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·exit1(SB),NOSPLIT,$-4
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MOVL $431, AX
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INT $0x80
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JAE 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·open(SB),NOSPLIT,$-4
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MOVL $5, AX
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INT $0x80
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MOVL AX, ret+12(FP)
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RET
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TEXT runtime·close(SB),NOSPLIT,$-4
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MOVL $6, AX
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INT $0x80
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MOVL AX, ret+4(FP)
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RET
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TEXT runtime·read(SB),NOSPLIT,$-4
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MOVL $3, AX
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INT $0x80
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MOVL AX, ret+12(FP)
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RET
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TEXT runtime·write(SB),NOSPLIT,$-4
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MOVL $4, AX
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INT $0x80
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MOVL AX, ret+12(FP)
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RET
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TEXT runtime·getrlimit(SB),NOSPLIT,$-4
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MOVL $194, AX
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INT $0x80
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MOVL AX, ret+8(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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LEAL 8(SP), AX
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MOVL AX, 4(SP)
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MOVL $432, AX
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INT $0x80
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// thr_kill(self, SIGPIPE)
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MOVL 8(SP), AX
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MOVL AX, 4(SP)
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MOVL sig+0(FP), AX
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MOVL AX, 8(SP)
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MOVL $433, AX
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INT $0x80
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RET
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TEXT runtime·mmap(SB),NOSPLIT,$32
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LEAL addr+0(FP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVL $0, AX // top 32 bits of file offset
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STOSL
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MOVL $477, AX
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INT $0x80
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MOVL AX, ret+24(FP)
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RET
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TEXT runtime·munmap(SB),NOSPLIT,$-4
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MOVL $73, AX
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INT $0x80
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JAE 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·madvise(SB),NOSPLIT,$-4
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MOVL $75, AX // madvise
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INT $0x80
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// ignore failure - maybe pages are locked
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RET
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TEXT runtime·setitimer(SB), NOSPLIT, $-4
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MOVL $83, AX
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INT $0x80
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RET
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// func now() (sec int64, nsec int32)
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TEXT time·now(SB), NOSPLIT, $32
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MOVL $232, AX
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LEAL 12(SP), BX
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MOVL $0, 4(SP) // CLOCK_REALTIME
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MOVL BX, 8(SP)
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INT $0x80
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MOVL 12(SP), AX // sec
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MOVL 16(SP), BX // nsec
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// sec is in AX, nsec in BX
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MOVL AX, sec+0(FP)
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MOVL $0, sec+4(FP)
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MOVL BX, nsec+8(FP)
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RET
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// int64 nanotime(void) so really
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// void nanotime(int64 *nsec)
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TEXT runtime·nanotime(SB), NOSPLIT, $32
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MOVL $232, AX
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LEAL 12(SP), BX
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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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MOVL $4, 4(SP) // CLOCK_MONOTONIC
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MOVL BX, 8(SP)
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INT $0x80
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MOVL 12(SP), AX // sec
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MOVL 16(SP), BX // nsec
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// sec is in AX, nsec in BX
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// convert to DX:AX nsec
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MOVL $1000000000, CX
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MULL CX
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ADDL BX, AX
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ADCL $0, DX
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MOVL AX, ret_lo+0(FP)
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MOVL DX, ret_hi+4(FP)
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RET
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TEXT runtime·sigaction(SB),NOSPLIT,$-4
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MOVL $416, AX
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INT $0x80
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JAE 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·sigtramp(SB),NOSPLIT,$44
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get_tls(CX)
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// check that g exists
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MOVL g(CX), DI
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CMPL DI, $0
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JNE 6(PC)
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MOVL signo+0(FP), BX
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MOVL BX, 0(SP)
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MOVL $runtime·badsignal(SB), AX
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CALL AX
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JMP ret
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// save g
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MOVL DI, 20(SP)
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// g = m->gsignal
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MOVL g_m(DI), BX
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MOVL m_gsignal(BX), BX
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MOVL BX, g(CX)
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// copy arguments for call to sighandler
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MOVL signo+0(FP), BX
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MOVL BX, 0(SP)
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MOVL info+4(FP), BX
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MOVL BX, 4(SP)
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MOVL context+8(FP), BX
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MOVL BX, 8(SP)
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MOVL DI, 12(SP)
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CALL runtime·sighandler(SB)
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// restore g
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get_tls(CX)
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MOVL 20(SP), BX
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MOVL BX, g(CX)
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ret:
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// call sigreturn
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MOVL context+8(FP), AX
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MOVL $0, 0(SP) // syscall gap
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MOVL AX, 4(SP)
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MOVL $417, AX // sigreturn(ucontext)
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INT $0x80
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·sigaltstack(SB),NOSPLIT,$0
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MOVL $53, AX
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INT $0x80
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JAE 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·usleep(SB),NOSPLIT,$20
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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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MOVL AX, 12(SP) // tv_sec
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MOVL $1000, AX
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MULL DX
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MOVL AX, 16(SP) // tv_nsec
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MOVL $0, 0(SP)
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LEAL 12(SP), AX
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MOVL AX, 4(SP) // arg 1 - rqtp
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MOVL $0, 8(SP) // arg 2 - rmtp
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MOVL $240, AX // sys_nanosleep
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INT $0x80
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RET
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/*
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descriptor entry format for system call
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is the native machine format, ugly as it is:
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2-byte limit
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3-byte base
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1-byte: 0x80=present, 0x60=dpl<<5, 0x1F=type
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1-byte: 0x80=limit is *4k, 0x40=32-bit operand size,
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0x0F=4 more bits of limit
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1 byte: 8 more bits of base
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int i386_get_ldt(int, union ldt_entry *, int);
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int i386_set_ldt(int, const union ldt_entry *, int);
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*/
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// setldt(int entry, int address, int limit)
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TEXT runtime·setldt(SB),NOSPLIT,$32
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MOVL address+4(FP), BX // aka base
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// see comment in sys_linux_386.s; freebsd is similar
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ADDL $0x8, BX
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// set up data_desc
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LEAL 16(SP), AX // struct data_desc
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MOVL $0, 0(AX)
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MOVL $0, 4(AX)
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MOVW BX, 2(AX)
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SHRL $16, BX
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MOVB BX, 4(AX)
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SHRL $8, BX
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MOVB BX, 7(AX)
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MOVW $0xffff, 0(AX)
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MOVB $0xCF, 6(AX) // 32-bit operand, 4k limit unit, 4 more bits of limit
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MOVB $0xF2, 5(AX) // r/w data descriptor, dpl=3, present
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// call i386_set_ldt(entry, desc, 1)
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MOVL $0xffffffff, 0(SP) // auto-allocate entry and return in AX
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MOVL AX, 4(SP)
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MOVL $1, 8(SP)
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CALL runtime·i386_set_ldt(SB)
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// compute segment selector - (entry*8+7)
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SHLL $3, AX
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ADDL $7, AX
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MOVW AX, GS
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RET
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TEXT runtime·i386_set_ldt(SB),NOSPLIT,$16
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LEAL args+0(FP), AX // 0(FP) == 4(SP) before SP got moved
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MOVL $0, 0(SP) // syscall gap
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MOVL $1, 4(SP)
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MOVL AX, 8(SP)
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MOVL $165, AX
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INT $0x80
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JAE 2(PC)
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INT $3
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RET
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TEXT runtime·sysctl(SB),NOSPLIT,$28
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LEAL mib+0(FP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL // arg 1 - name
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MOVSL // arg 2 - namelen
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MOVSL // arg 3 - oldp
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MOVSL // arg 4 - oldlenp
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MOVSL // arg 5 - newp
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MOVSL // arg 6 - newlen
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MOVL $202, AX // sys___sysctl
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INT $0x80
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JAE 4(PC)
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NEGL AX
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MOVL AX, ret+24(FP)
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RET
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MOVL $0, AX
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MOVL AX, ret+24(FP)
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RET
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TEXT runtime·osyield(SB),NOSPLIT,$-4
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MOVL $331, AX // sys_sched_yield
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INT $0x80
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RET
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TEXT runtime·sigprocmask(SB),NOSPLIT,$16
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MOVL $0, 0(SP) // syscall gap
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MOVL $3, 4(SP) // arg 1 - how (SIG_SETMASK)
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MOVL new+0(FP), AX
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MOVL AX, 8(SP) // arg 2 - set
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MOVL old+4(FP), AX
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MOVL AX, 12(SP) // arg 3 - oset
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MOVL $340, AX // sys_sigprocmask
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INT $0x80
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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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MOVL $362, AX
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INT $0x80
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JAE 2(PC)
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NEGL 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 $363, AX
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INT $0x80
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JAE 2(PC)
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NEGL AX
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MOVL AX, ret+24(FP)
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RET
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// int32 runtime·closeonexec(int32 fd);
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TEXT runtime·closeonexec(SB),NOSPLIT,$32
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MOVL $92, AX // fcntl
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// 0(SP) is where the caller PC would be; kernel skips it
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MOVL fd+0(FP), BX
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MOVL BX, 4(SP) // fd
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MOVL $2, 8(SP) // F_SETFD
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MOVL $1, 12(SP) // FD_CLOEXEC
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INT $0x80
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JAE 2(PC)
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NEGL AX
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RET
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GLOBL runtime·tlsoffset(SB),NOPTR,$4
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