2016-01-27 09:31:24 -07:00
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// Copyright 2015 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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#include "go_asm.h"
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#include "go_tls.h"
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#include "textflag.h"
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// from ../syscall/zsysnum_plan9.go
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#define SYS_SYSR1 0
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#define SYS_BIND 2
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#define SYS_CHDIR 3
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#define SYS_CLOSE 4
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#define SYS_DUP 5
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#define SYS_ALARM 6
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#define SYS_EXEC 7
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#define SYS_EXITS 8
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#define SYS_FAUTH 10
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#define SYS_SEGBRK 12
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#define SYS_OPEN 14
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#define SYS_OSEEK 16
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#define SYS_SLEEP 17
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#define SYS_RFORK 19
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#define SYS_PIPE 21
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#define SYS_CREATE 22
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#define SYS_FD2PATH 23
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#define SYS_BRK_ 24
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#define SYS_REMOVE 25
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#define SYS_NOTIFY 28
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#define SYS_NOTED 29
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#define SYS_SEGATTACH 30
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#define SYS_SEGDETACH 31
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#define SYS_SEGFREE 32
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#define SYS_SEGFLUSH 33
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#define SYS_RENDEZVOUS 34
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#define SYS_UNMOUNT 35
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#define SYS_SEMACQUIRE 37
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#define SYS_SEMRELEASE 38
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#define SYS_SEEK 39
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#define SYS_FVERSION 40
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#define SYS_ERRSTR 41
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#define SYS_STAT 42
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#define SYS_FSTAT 43
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#define SYS_WSTAT 44
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#define SYS_FWSTAT 45
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#define SYS_MOUNT 46
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#define SYS_AWAIT 47
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#define SYS_PREAD 50
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#define SYS_PWRITE 51
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#define SYS_TSEMACQUIRE 52
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#define SYS_NSEC 53
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//func open(name *byte, mode, perm int32) int32
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TEXT runtime·open(SB),NOSPLIT,$0-16
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MOVW $SYS_OPEN, R0
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SWI $0
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MOVW R0, ret+12(FP)
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RET
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//func pread(fd int32, buf unsafe.Pointer, nbytes int32, offset int64) int32
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TEXT runtime·pread(SB),NOSPLIT,$0-24
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MOVW $SYS_PREAD, R0
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SWI $0
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MOVW R0, ret+20(FP)
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RET
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//func pwrite(fd int32, buf unsafe.Pointer, nbytes int32, offset int64) int32
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TEXT runtime·pwrite(SB),NOSPLIT,$0-24
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MOVW $SYS_PWRITE, R0
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SWI $0
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MOVW R0, ret+20(FP)
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RET
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//func seek(fd int32, offset int64, whence int32) int64
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TEXT runtime·seek(SB),NOSPLIT,$0-24
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MOVW $ret_lo+16(FP), R0
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MOVW 0(R13), R1
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MOVW R0, 0(R13)
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MOVW.W R1, -4(R13)
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MOVW $SYS_SEEK, R0
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SWI $0
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MOVW.W R1, 4(R13)
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CMP $-1, R0
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MOVW.EQ R0, ret_lo+16(FP)
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MOVW.EQ R0, ret_hi+20(FP)
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RET
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//func closefd(fd int32) int32
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TEXT runtime·closefd(SB),NOSPLIT,$0-8
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MOVW $SYS_CLOSE, R0
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SWI $0
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MOVW R0, ret+4(FP)
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RET
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//func exits(msg *byte)
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TEXT runtime·exits(SB),NOSPLIT,$0-4
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MOVW $SYS_EXITS, R0
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SWI $0
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RET
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//func brk_(addr unsafe.Pointer) int32
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TEXT runtime·brk_(SB),NOSPLIT,$0-8
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MOVW $SYS_BRK_, R0
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SWI $0
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MOVW R0, ret+4(FP)
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RET
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//func sleep(ms int32) int32
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TEXT runtime·sleep(SB),NOSPLIT,$0-8
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MOVW $SYS_SLEEP, R0
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SWI $0
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MOVW R0, ret+4(FP)
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RET
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//func plan9_semacquire(addr *uint32, block int32) int32
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TEXT runtime·plan9_semacquire(SB),NOSPLIT,$0-12
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MOVW $SYS_SEMACQUIRE, R0
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SWI $0
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MOVW R0, ret+8(FP)
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RET
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//func plan9_tsemacquire(addr *uint32, ms int32) int32
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TEXT runtime·plan9_tsemacquire(SB),NOSPLIT,$0-12
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MOVW $SYS_TSEMACQUIRE, R0
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SWI $0
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MOVW R0, ret+8(FP)
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RET
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//func nsec(*int64) int64
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TEXT runtime·nsec(SB),NOSPLIT,$-4-12
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MOVW $SYS_NSEC, R0
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SWI $0
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cmd/vet: improve asmdecl parameter handling
The asmdecl check had hand-rolled code that
calculated the size and offset of parameters
based only on the AST.
It included a list of known named types.
This CL changes asmdecl to use go/types instead.
This allows us to easily handle named types.
It also adds support for structs, arrays,
and complex parameters.
It improves the default names given to unnamed
parameters. Previously, all anonymous arguments were
called "unnamed", and the first anonymous return
argument was called "ret".
Anonymous arguments are now called arg, arg1, arg2,
etc., depending on the index in the argument list.
Return arguments are ret, ret1, ret2.
This CL also fixes a bug in the printing of
composite data type sizes.
Updates #11041
Change-Id: I1085116a26fe6199480b680eff659eb9ab31769b
Reviewed-on: https://go-review.googlesource.com/27150
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2016-07-09 18:10:57 -06:00
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MOVW arg+0(FP), R1
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MOVW 0(R1), R0
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MOVW R0, ret_lo+4(FP)
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MOVW 4(R1), R0
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MOVW R0, ret_hi+8(FP)
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RET
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// time.now() (sec int64, nsec int32)
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TEXT runtime·walltime(SB),NOSPLIT,$12-12
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// use nsec system call to get current time in nanoseconds
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MOVW $sysnsec_lo-8(SP), R0 // destination addr
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MOVW R0,res-12(SP)
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MOVW $SYS_NSEC, R0
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SWI $0
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MOVW sysnsec_lo-8(SP), R1 // R1:R2 = nsec
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MOVW sysnsec_hi-4(SP), R2
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// multiply nanoseconds by reciprocal of 10**9 (scaled by 2**61)
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// to get seconds (96 bit scaled result)
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MOVW $0x89705f41, R3 // 2**61 * 10**-9
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MULLU R1,R3,(R6,R5) // R5:R6:R7 = R1:R2 * R3
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MOVW $0,R7
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MULALU R2,R3,(R7,R6)
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// unscale by discarding low 32 bits, shifting the rest by 29
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MOVW R6>>29,R6 // R6:R7 = (R5:R6:R7 >> 61)
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ORR R7<<3,R6
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MOVW R7>>29,R7
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// subtract (10**9 * sec) from nsec to get nanosecond remainder
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MOVW $1000000000, R5 // 10**9
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MULLU R6,R5,(R9,R8) // R8:R9 = R6:R7 * R5
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MULA R7,R5,R9,R9
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SUB.S R8,R1 // R1:R2 -= R8:R9
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SBC R9,R2
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// because reciprocal was a truncated repeating fraction, quotient
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// may be slightly too small -- adjust to make remainder < 10**9
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CMP R5,R1 // if remainder > 10**9
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SUB.HS R5,R1 // remainder -= 10**9
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ADD.HS $1,R6 // sec += 1
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MOVW R6,sec_lo+0(FP)
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MOVW R7,sec_hi+4(FP)
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MOVW R1,nsec+8(FP)
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RET
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//func notify(fn unsafe.Pointer) int32
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TEXT runtime·notify(SB),NOSPLIT,$0-8
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MOVW $SYS_NOTIFY, R0
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SWI $0
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MOVW R0, ret+4(FP)
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RET
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//func noted(mode int32) int32
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TEXT runtime·noted(SB),NOSPLIT,$0-8
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MOVW $SYS_NOTED, R0
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SWI $0
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MOVW R0, ret+4(FP)
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RET
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//func plan9_semrelease(addr *uint32, count int32) int32
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TEXT runtime·plan9_semrelease(SB),NOSPLIT,$0-12
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MOVW $SYS_SEMRELEASE, R0
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SWI $0
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MOVW R0, ret+8(FP)
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RET
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//func rfork(flags int32) int32
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TEXT runtime·rfork(SB),NOSPLIT,$0-8
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MOVW $SYS_RFORK, R0
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SWI $0
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MOVW R0, ret+4(FP)
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RET
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//func tstart_plan9(newm *m)
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TEXT runtime·tstart_plan9(SB),NOSPLIT,$0-4
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MOVW newm+0(FP), R1
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MOVW m_g0(R1), g
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// Layout new m scheduler stack on os stack.
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MOVW R13, R0
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MOVW R0, g_stack+stack_hi(g)
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SUB $(64*1024), R0
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MOVW R0, (g_stack+stack_lo)(g)
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MOVW R0, g_stackguard0(g)
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MOVW R0, g_stackguard1(g)
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// Initialize procid from TOS struct.
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MOVW _tos(SB), R0
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MOVW 48(R0), R0
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MOVW R0, m_procid(R1) // save pid as m->procid
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BL runtime·mstart(SB)
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MOVW $0x1234, R0
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MOVW R0, 0(R0) // not reached
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RET
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2016-10-25 07:44:58 -06:00
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//func sigtramp(ureg, note unsafe.Pointer)
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TEXT runtime·sigtramp(SB),NOSPLIT,$0-8
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// check that g and m exist
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CMP $0, g
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BEQ 4(PC)
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MOVW g_m(g), R0
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CMP $0, R0
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BNE 2(PC)
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BL runtime·badsignal2(SB) // will exit
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// save args
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MOVW ureg+0(FP), R1
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MOVW note+4(FP), R2
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// change stack
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MOVW m_gsignal(R0), R3
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MOVW (g_stack+stack_hi)(R3), R13
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// make room for args, retval and g
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SUB $24, R13
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// save g
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MOVW g, R3
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MOVW R3, 20(R13)
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// g = m->gsignal
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MOVW m_gsignal(R0), g
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// load args and call sighandler
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ADD $4,R13,R5
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MOVM.IA [R1-R3], (R5)
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BL runtime·sighandler(SB)
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MOVW 16(R13), R0 // retval
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// restore g
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MOVW 20(R13), g
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// call noted(R0)
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MOVW R0, 4(R13)
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BL runtime·noted(SB)
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RET
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//func sigpanictramp()
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TEXT runtime·sigpanictramp(SB),NOSPLIT,$0-0
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MOVW.W R0, -4(R13)
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B runtime·sigpanic(SB)
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//func setfpmasks()
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// Only used by the 64-bit runtime.
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TEXT runtime·setfpmasks(SB),NOSPLIT,$0
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RET
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#define ERRMAX 128 /* from os_plan9.h */
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// func errstr() string
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// Only used by package syscall.
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// Grab error string due to a syscall made
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// in entersyscall mode, without going
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// through the allocator (issue 4994).
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// See ../syscall/asm_plan9_arm.s:/·Syscall/
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TEXT runtime·errstr(SB),NOSPLIT,$0-8
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MOVW g_m(g), R0
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MOVW (m_mOS+mOS_errstr)(R0), R1
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MOVW R1, ret_base+0(FP)
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MOVW $ERRMAX, R2
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MOVW R2, ret_len+4(FP)
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MOVW $SYS_ERRSTR, R0
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2017-05-16 07:30:27 -06:00
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SWI $0
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2016-01-27 09:31:24 -07:00
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MOVW R1, R2
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MOVBU 0(R2), R0
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CMP $0, R0
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BEQ 3(PC)
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ADD $1, R2
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B -4(PC)
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SUB R1, R2
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MOVW R2, ret_len+4(FP)
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RET
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TEXT ·publicationBarrier(SB),NOSPLIT,$-4-0
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B runtime·armPublicationBarrier(SB)
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// never called (cgo not supported)
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TEXT runtime·read_tls_fallback(SB),NOSPLIT,$-4
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MOVW $0, R0
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MOVW R0, (R0)
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RET
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