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| 1 // Copyright 2010 The Go Authors. All rights reserved. |
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| 2 // Use of this source code is governed by a BSD-style |
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| 3 // license that can be found in the LICENSE file. |
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| 4 |
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| 5 #include "defs.h" |
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| 6 #include "386/asm.h" |
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| 7 |
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| 8 // setldt(int entry, int address, int limit) |
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| 9 TEXT setldt(SB),7,0ドル |
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| 10 RET |
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| 11 |
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| 12 TEXT write(SB),7,0ドル |
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| 13 MOVL 20,ドル AX |
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| 14 INT 64ドル |
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| 15 RET |
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| 16 |
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| 17 TEXT exits(SB),7,0ドル |
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| 18 MOVL 8,ドル AX |
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| 19 INT 64ドル |
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| 20 RET |
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| 21 |
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| 22 TEXT brk_(SB),7,0ドル |
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| 23 MOVL 24,ドル AX |
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| 24 INT 64ドル |
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| 25 RET |
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| 26 |
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| 27 TEXT plan9_semacquire(SB),7,0ドル |
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| 28 MOVL 37,ドル AX |
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| 29 INT 64ドル |
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| 30 RET |
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| 31 ········ |
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| 32 TEXT plan9_semrelease(SB),7,0ドル |
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| 33 MOVL 38,ドル AX |
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| 34 INT 64ドル |
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| 35 RET |
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| 36 ········ |
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| 37 TEXT rfork(SB),7,0ドル |
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| 38 MOVL 19,ドル AX // rfork |
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| 39 INT 64ドル |
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| 40 |
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| 41 // In parent, return. |
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| 42 CMPL AX, 0ドル |
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| 43 JEQ 2(PC) |
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| 44 RET |
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| 45 |
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| 46 // In child on old stack. |
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| 47 MOVL mm+12(SP), BX // m |
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| 48 MOVL gg+16(SP), DX // g |
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| 49 MOVL fn+20(SP), SI // fn |
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| 50 |
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| 51 // set SP to be on the new child stack |
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| 52 MOVL stack+8(SP), CX |
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| 53 MOVL CX, SP |
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| 54 |
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| 55 // Initialize m, g. |
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| 56 get_tls(AX) |
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| 57 MOVL DX, g(AX) |
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| 58 MOVL BX, m(AX) |
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| 59 |
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| 60 // Initialize AX from _tos->pid |
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| 61 MOVL 0xdfffeff8, AX |
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| 62 MOVL AX, m_procid(BX) // save pid as m->procid |
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| 63 |
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| 64 CALL stackcheck(SB) // smashes AX, CX |
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| 65 ········ |
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| 66 MOVL 0(DX), DX // paranoia; check they are not nil |
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| 67 MOVL 0(BX), BX |
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| 68 ········ |
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| 69 // more paranoia; check that stack splitting code works |
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| 70 PUSHAL |
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| 71 CALL emptyfunc(SB) |
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| 72 POPAL |
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| 73 ········ |
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| 74 CALL SI // fn() |
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| 75 CALL exit(SB) |
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| 76 RET |
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