mirror of
https://github.com/golang/go
synced 2024-11-19 13:14:42 -07:00
15ced2d008
The main change is that #include "zasm_GOOS_GOARCH.h" is now #include "go_asm.h" and/or #include "go_tls.h". Also, because C StackGuard is now Go _StackGuard, the assembly name changes from const_StackGuard to const__StackGuard. In asm_$GOARCH.s, add new function getg, formerly implemented in C. The renamed atomics now have Go wrappers, to get escape analysis annotations right. Those wrappers are in CL 174860043. LGTM=r, aram R=r, aram CC=austin, dvyukov, golang-codereviews, iant, khr https://golang.org/cl/168510043
386 lines
7.5 KiB
ArmAsm
386 lines
7.5 KiB
ArmAsm
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//
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// System calls and other sys.stuff for 386, NetBSD
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// /usr/src/sys/kern/syscalls.master for syscall numbers.
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//
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#include "go_asm.h"
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#include "go_tls.h"
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#include "textflag.h"
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// Exit the entire program (like C exit)
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TEXT runtime·exit(SB),NOSPLIT,$-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 $310, AX // sys__lwp_exit
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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 // sys_write
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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·usleep(SB),NOSPLIT,$24
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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 - l32
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MOVL $0, 16(SP) // tv_sec - h32
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MOVL $1000, AX
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MULL DX
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MOVL AX, 20(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 $430, AX // sys_nanosleep
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INT $0x80
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RET
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TEXT runtime·raise(SB),NOSPLIT,$12
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MOVL $311, AX // sys__lwp_self
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INT $0x80
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MOVL $0, 0(SP)
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MOVL AX, 4(SP) // arg 1 - target
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MOVL sig+0(FP), AX
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MOVL AX, 8(SP) // arg 2 - signo
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MOVL $318, AX // sys__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 addr+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 $0x80
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MOVL AX, ret+24(FP)
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RET
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TEXT runtime·munmap(SB),NOSPLIT,$-4
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MOVL $73, AX // sys_munmap
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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 // sys_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 $425, AX // sys_setitimer
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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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LEAL 12(SP), BX
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MOVL $0, 4(SP) // arg 1 - clock_id
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MOVL BX, 8(SP) // arg 2 - tp
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MOVL $427, AX // sys_clock_gettime
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INT $0x80
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MOVL 12(SP), AX // sec - l32
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MOVL AX, sec+0(FP)
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MOVL 16(SP), AX // sec - h32
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MOVL AX, sec+4(FP)
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MOVL 20(SP), BX // nsec
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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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LEAL 12(SP), BX
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MOVL $0, 4(SP) // arg 1 - clock_id
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MOVL BX, 8(SP) // arg 2 - tp
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MOVL $427, AX // sys_clock_gettime
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INT $0x80
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MOVL 16(SP), CX // sec - h32
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IMULL $1000000000, CX
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MOVL 12(SP), AX // sec - l32
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MOVL $1000000000, BX
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MULL BX // result in dx:ax
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MOVL 20(SP), BX // nsec
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ADDL BX, AX
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ADCL CX, DX // add high bits with carry
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MOVL AX, ret_lo+0(FP)
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MOVL DX, ret_hi+4(FP)
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RET
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TEXT runtime·getcontext(SB),NOSPLIT,$-4
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MOVL $307, AX // sys_getcontext
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INT $0x80
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JAE 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·sigprocmask(SB),NOSPLIT,$-4
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MOVL $293, 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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TEXT runtime·sigreturn_tramp(SB),NOSPLIT,$0
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LEAL 140(SP), AX // Load address of ucontext
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MOVL AX, 4(SP)
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MOVL $308, AX // sys_setcontext
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INT $0x80
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MOVL $-1, 4(SP) // Something failed...
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MOVL $1, AX // sys_exit
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INT $0x80
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TEXT runtime·sigaction(SB),NOSPLIT,$24
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LEAL sig+0(FP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL // arg 1 - sig
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MOVSL // arg 2 - act
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MOVSL // arg 3 - oact
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LEAL runtime·sigreturn_tramp(SB), AX
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STOSL // arg 4 - tramp
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MOVL $2, AX
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STOSL // arg 5 - vers
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MOVL $340, AX // sys___sigaction_sigtramp
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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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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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// int32 lwp_create(void *context, uintptr flags, void *lwpid);
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TEXT runtime·lwp_create(SB),NOSPLIT,$16
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MOVL $0, 0(SP)
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MOVL ctxt+0(FP), AX
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MOVL AX, 4(SP) // arg 1 - context
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MOVL flags+4(FP), AX
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MOVL AX, 8(SP) // arg 2 - flags
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MOVL lwpid+8(FP), AX
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MOVL AX, 12(SP) // arg 3 - lwpid
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MOVL $309, AX // sys__lwp_create
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INT $0x80
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JCC 2(PC)
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NEGL AX
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MOVL AX, ret+12(FP)
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RET
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TEXT runtime·lwp_tramp(SB),NOSPLIT,$0
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// Set FS to point at m->tls
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LEAL m_tls(BX), BP
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PUSHAL // save registers
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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(AX)
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MOVL DX, g(AX)
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MOVL BX, g_m(DX)
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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 fn
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CALL SI
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CALL runtime·exit1(SB)
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MOVL $0x1234, 0x1005
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RET
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TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
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MOVL $281, AX // sys___sigaltstack14
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MOVL new+4(SP), BX
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MOVL old+8(SP), CX
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INT $0x80
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CMPL AX, $0xfffff001
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JLS 2(PC)
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INT $3
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RET
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TEXT runtime·setldt(SB),NOSPLIT,$8
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// Under NetBSD we set the GS base instead of messing with the LDT.
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MOVL 16(SP), AX // tls0
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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,$16
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// adjust for ELF: wants to use -8(GS) and -4(GS) for g and m
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MOVL base+0(FP), CX
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ADDL $8, CX
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MOVL $0, 0(SP) // syscall gap
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MOVL CX, 4(SP) // arg 1 - ptr
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MOVL $317, AX // sys__lwp_setprivate
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INT $0x80
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JCC 2(PC)
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MOVL $0xf1, 0xf1 // crash
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RET
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TEXT runtime·osyield(SB),NOSPLIT,$-4
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MOVL $350, AX // sys_sched_yield
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INT $0x80
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RET
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TEXT runtime·lwp_park(SB),NOSPLIT,$-4
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MOVL $434, AX // sys__lwp_park
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INT $0x80
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MOVL AX, ret+16(FP)
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RET
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TEXT runtime·lwp_unpark(SB),NOSPLIT,$-4
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MOVL $321, AX // sys__lwp_unpark
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INT $0x80
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MOVL AX, ret+8(FP)
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RET
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TEXT runtime·lwp_self(SB),NOSPLIT,$-4
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MOVL $311, AX // sys__lwp_self
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INT $0x80
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MOVL AX, ret+0(FP)
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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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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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GLOBL runtime·tlsoffset(SB),NOPTR,$4
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// int32 runtime·kqueue(void)
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TEXT runtime·kqueue(SB),NOSPLIT,$0
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MOVL $344, 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 $435, 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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