| // Copyright 2010 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| #include "defs.h" |
| #include "386/asm.h" |
| |
| // setldt(int entry, int address, int limit) |
| TEXT setldt(SB),7,$0 |
| RET |
| |
| TEXT write(SB),7,$0 |
| MOVL $20, AX |
| INT $64 |
| RET |
| |
| TEXT exits(SB),7,$0 |
| MOVL $8, AX |
| INT $64 |
| RET |
| |
| TEXT brk_(SB),7,$0 |
| MOVL $24, AX |
| INT $64 |
| RET |
| |
| TEXT plan9_semacquire(SB),7,$0 |
| MOVL $37, AX |
| INT $64 |
| RET |
| |
| TEXT plan9_semrelease(SB),7,$0 |
| MOVL $38, AX |
| INT $64 |
| RET |
| |
| TEXT rfork(SB),7,$0 |
| MOVL $19, AX // rfork |
| INT $64 |
| |
| // In parent, return. |
| CMPL AX, $0 |
| JEQ 2(PC) |
| RET |
| |
| // In child on old stack. |
| MOVL mm+12(SP), BX // m |
| MOVL gg+16(SP), DX // g |
| MOVL fn+20(SP), SI // fn |
| |
| // set SP to be on the new child stack |
| MOVL stack+8(SP), CX |
| MOVL CX, SP |
| |
| // Initialize m, g. |
| get_tls(AX) |
| MOVL DX, g(AX) |
| MOVL BX, m(AX) |
| |
| // Initialize AX from _tos->pid |
| MOVL 0xdfffeff8, AX |
| MOVL AX, m_procid(BX) // save pid as m->procid |
| |
| CALL stackcheck(SB) // smashes AX, CX |
| |
| MOVL 0(DX), DX // paranoia; check they are not nil |
| MOVL 0(BX), BX |
| |
| // more paranoia; check that stack splitting code works |
| PUSHAL |
| CALL emptyfunc(SB) |
| POPAL |
| |
| CALL SI // fn() |
| CALL exit(SB) |
| RET |
