mirror of
https://github.com/golang/go
synced 2024-11-13 20:30:27 -07:00
370 lines
7.1 KiB
ArmAsm
370 lines
7.1 KiB
ArmAsm
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// 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 "zasm_GOOS_GOARCH.h"
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#include "../../cmd/ld/textflag.h"
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TEXT runtime·sys_umtx_sleep(SB),NOSPLIT,$-4
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MOVL $469, AX // umtx_sleep
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INT $0x80
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JAE 2(PC)
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NEGL AX
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RET
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TEXT runtime·sys_umtx_wakeup(SB),NOSPLIT,$-4
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MOVL $470, AX // umtx_wakeup
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INT $0x80
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JAE 2(PC)
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NEGL AX
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RET
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TEXT runtime·lwp_create(SB),NOSPLIT,$-4
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MOVL $495, AX // lwp_create
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INT $0x80
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RET
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TEXT runtime·lwp_start(SB),NOSPLIT,$0
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// Set GS to point at m->tls.
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MOVL mm+0(FP), BX
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MOVL m_g0(BX), DX
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LEAL m_tls(BX), BP
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PUSHAL
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PUSHL BP
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CALL runtime·settls(SB)
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POPL AX
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POPAL
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// Now segment is established. Initialize m, g.
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get_tls(CX)
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MOVL BX, m(CX)
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MOVL DX, g(CX)
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CALL runtime·stackcheck(SB) // smashes AX, CX
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MOVL 0(DX), DX // paranoia; check they are not nil
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MOVL 0(BX), BX
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// More paranoia; check that stack splitting code works.
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PUSHAL
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CALL runtime·emptyfunc(SB)
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POPAL
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CALL runtime·mstart(SB)
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CALL runtime·exit1(SB)
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MOVL $0x1234, 0x1005
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RET
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// Exit the entire program (like C exit)
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TEXT runtime·exit(SB),NOSPLIT,$-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,$16
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MOVL $0, 0(SP) // syscall gap
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MOVL $0x10000, 4(SP) // arg 1 - how (EXTEXIT_LWP)
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MOVL $0, 8(SP) // arg 2 - status
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MOVL $0, 12(SP) // arg 3 - addr
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MOVL $494, 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 $0x80
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RET
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TEXT runtime·close(SB),NOSPLIT,$-4
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MOVL $6, AX
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INT $0x80
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RET
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TEXT runtime·read(SB),NOSPLIT,$-4
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MOVL $3, AX
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INT $0x80
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RET
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TEXT runtime·write(SB),NOSPLIT,$-4
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MOVL $4, AX
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INT $0x80
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RET
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TEXT runtime·getrlimit(SB),NOSPLIT,$-4
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MOVL $194, AX
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INT $0x80
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RET
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TEXT runtime·raise(SB),NOSPLIT,$16
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MOVL $496, AX // lwp_gettid
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INT $0x80
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MOVL $0, 0(SP)
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MOVL $-1, 4(SP) // arg 1 - pid
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MOVL AX, 8(SP) // arg 2 - tid
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MOVL sig+0(FP), AX
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MOVL AX, 8(SP) // arg 3 - signum
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MOVL $497, AX // lwp_kill
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INT $0x80
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RET
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TEXT runtime·mmap(SB),NOSPLIT,$36
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LEAL arg0+0(FP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL // arg 1 - addr
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MOVSL // arg 2 - len
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MOVSL // arg 3 - prot
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MOVSL // arg 4 - flags
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MOVSL // arg 5 - fd
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MOVL $0, AX
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STOSL // arg 6 - pad
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MOVSL // arg 7 - offset
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MOVL $0, AX // top 32 bits of file offset
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STOSL
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MOVL $197, AX // sys_mmap
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INT $0x80
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RET
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TEXT runtime·munmap(SB),NOSPLIT,$-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)
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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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MOVL $0, 4(SP)
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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 $0, DX
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MOVL ret+0(FP), DI
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MOVL AX, 0(DI)
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MOVL DX, 4(DI)
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RET
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TEXT runtime·sigaction(SB),NOSPLIT,$-4
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MOVL $342, 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 m exists
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MOVL m(CX), BX
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CMPL BX, $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 sigtramp_ret
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// save g
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MOVL g(CX), DI
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MOVL DI, 20(SP)
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// g = m->gsignal
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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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sigtramp_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 $344, 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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TEXT runtime·setldt(SB),NOSPLIT,$4
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// Under DragonFly we set the GS base instead of messing with the LDT.
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MOVL tls0+4(FP), AX
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MOVL AX, 0(SP)
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CALL runtime·settls(SB)
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RET
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TEXT runtime·settls(SB),NOSPLIT,$24
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// adjust for ELF: wants to use -8(GS) and -4(GS) for g and m
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MOVL tlsbase+0(FP), CX
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ADDL $8, CX
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// Set up a struct tls_info - a size of -1 maps the whole address
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// space and is required for direct-tls access of variable data
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// via negative offsets.
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LEAL 16(SP), BX
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MOVL CX, 16(SP) // base
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MOVL $-1, 20(SP) // size
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// set_tls_area returns the descriptor that needs to be loaded into GS.
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MOVL $0, 0(SP) // syscall gap
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MOVL $0, 4(SP) // arg 1 - which
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MOVL BX, 8(SP) // arg 2 - tls_info
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MOVL $8, 12(SP) // arg 3 - infosize
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MOVL $472, AX // set_tls_area
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INT $0x80
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JCC 2(PC)
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MOVL $0xf1, 0xf1 // crash
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MOVW AX, GS
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RET
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TEXT runtime·sysctl(SB),NOSPLIT,$28
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LEAL arg0+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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JCC 3(PC)
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NEGL AX
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RET
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MOVL $0, AX
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RET
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TEXT runtime·osyield(SB),NOSPLIT,$-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 args+0(FP), AX
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MOVL AX, 8(SP) // arg 2 - set
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MOVL args+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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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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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),$4
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