mirror of
https://github.com/golang/go
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84 lines
1.7 KiB
ArmAsm
84 lines
1.7 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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TEXT _rt0_arm(SB),7,$0
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// copy arguments forward on an even stack
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// MOVW $0(SP), R0
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// MOVL 0(SP), R1 // argc
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// LEAL 4(SP), R1 // argv
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// SUBL $128, SP // plenty of scratch
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// ANDL $~7, SP
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// MOVL AX, 120(SP) // save argc, argv away
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// MOVL BX, 124(SP)
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// // write "go386\n"
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// PUSHL $6
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// PUSHL $hello(SB)
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// PUSHL $1
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// CALL sys·write(SB)
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// POPL AX
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// POPL AX
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// POPL AX
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// CALL ldt0setup(SB)
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// set up %fs to refer to that ldt entry
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// MOVL $(7*8+7), AX
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// MOVW AX, FS
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// // store through it, to make sure it works
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// MOVL $0x123, 0(FS)
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// MOVL tls0(SB), AX
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// CMPL AX, $0x123
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// JEQ ok
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// MOVL AX, 0
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// ok:
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// // set up m and g "registers"
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// // g is 0(FS), m is 4(FS)
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// LEAL g0(SB), CX
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// MOVL CX, 0(FS)
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// LEAL m0(SB), AX
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// MOVL AX, 4(FS)
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// // save m->g0 = g0
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// MOVL CX, 0(AX)
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// // create istack out of the OS stack
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// LEAL (-8192+104)(SP), AX // TODO: 104?
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// MOVL AX, 0(CX) // 8(g) is stack limit (w 104b guard)
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// MOVL SP, 4(CX) // 12(g) is base
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// CALL emptyfunc(SB) // fault if stack check is wrong
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// // convention is D is always cleared
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// CLD
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// CALL check(SB)
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// // saved argc, argv
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// MOVL 120(SP), AX
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// MOVL AX, 0(SP)
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// MOVL 124(SP), AX
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// MOVL AX, 4(SP)
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// CALL args(SB)
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// CALL osinit(SB)
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// CALL schedinit(SB)
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// // create a new goroutine to start program
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// PUSHL $mainstart(SB) // entry
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// PUSHL $8 // arg size
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// CALL sys·newproc(SB)
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// POPL AX
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// POPL AX
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// // start this M
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// CALL mstart(SB)
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BL main<EFBFBD>main(SB)
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MOVW $99, R0
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SWI $0x00900001
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