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Viewing File: sys_plan9_386.s
// 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 "go_asm.h"
#include "go_tls.h"
#include "textflag.h"
// setldt(int entry, int address, int limit)
TEXT runtime·setldt(SB),NOSPLIT,$0
RET
TEXT runtime·open(SB),NOSPLIT,$0
MOVL $14, AX
INT $64
MOVL AX, ret+12(FP)
RET
TEXT runtime·pread(SB),NOSPLIT,$0
MOVL $50, AX
INT $64
MOVL AX, ret+20(FP)
RET
TEXT runtime·pwrite(SB),NOSPLIT,$0
MOVL $51, AX
INT $64
MOVL AX, ret+20(FP)
RET
// int32 _seek(int64*, int32, int64, int32)
TEXT _seek<>(SB),NOSPLIT,$0
MOVL $39, AX
INT $64
RET
TEXT runtime·seek(SB),NOSPLIT,$24
LEAL ret+16(FP), AX
MOVL fd+0(FP), BX
MOVL offset_lo+4(FP), CX
MOVL offset_hi+8(FP), DX
MOVL whence+12(FP), SI
MOVL AX, 0(SP)
MOVL BX, 4(SP)
MOVL CX, 8(SP)
MOVL DX, 12(SP)
MOVL SI, 16(SP)
CALL _seek<>(SB)
CMPL AX, $0
JGE 3(PC)
MOVL $-1, ret_lo+16(FP)
MOVL $-1, ret_hi+20(FP)
RET
TEXT runtime·closefd(SB),NOSPLIT,$0
MOVL $4, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·exits(SB),NOSPLIT,$0
MOVL $8, AX
INT $64
RET
TEXT runtime·brk_(SB),NOSPLIT,$0
MOVL $24, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·sleep(SB),NOSPLIT,$0
MOVL $17, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·plan9_semacquire(SB),NOSPLIT,$0
MOVL $37, AX
INT $64
MOVL AX, ret+8(FP)
RET
TEXT runtime·plan9_tsemacquire(SB),NOSPLIT,$0
MOVL $52, AX
INT $64
MOVL AX, ret+8(FP)
RET
TEXT nsec<>(SB),NOSPLIT,$0
MOVL $53, AX
INT $64
RET
TEXT runtime·nsec(SB),NOSPLIT,$8
LEAL ret+4(FP), AX
MOVL AX, 0(SP)
CALL nsec<>(SB)
CMPL AX, $0
JGE 3(PC)
MOVL $-1, ret_lo+4(FP)
MOVL $-1, ret_hi+8(FP)
RET
// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB),NOSPLIT,$8-12
CALL runtime·nanotime1(SB)
MOVL 0(SP), AX
MOVL 4(SP), DX
MOVL $1000000000, CX
DIVL CX
MOVL AX, sec_lo+0(FP)
MOVL $0, sec_hi+4(FP)
MOVL DX, nsec+8(FP)
RET
TEXT runtime·notify(SB),NOSPLIT,$0
MOVL $28, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·noted(SB),NOSPLIT,$0
MOVL $29, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·plan9_semrelease(SB),NOSPLIT,$0
MOVL $38, AX
INT $64
MOVL AX, ret+8(FP)
RET
TEXT runtime·rfork(SB),NOSPLIT,$0
MOVL $19, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·tstart_plan9(SB),NOSPLIT,$4
MOVL newm+0(FP), CX
MOVL m_g0(CX), DX
// Layout new m scheduler stack on os stack.
MOVL SP, AX
MOVL AX, (g_stack+stack_hi)(DX)
SUBL $(64*1024), AX // stack size
MOVL AX, (g_stack+stack_lo)(DX)
MOVL AX, g_stackguard0(DX)
MOVL AX, g_stackguard1(DX)
// Initialize procid from TOS struct.
MOVL _tos(SB), AX
MOVL 48(AX), AX
MOVL AX, m_procid(CX) // save pid as m->procid
// Finally, initialize g.
get_tls(BX)
MOVL DX, g(BX)
CALL runtime·stackcheck(SB) // smashes AX, CX
CALL runtime·mstart(SB)
// Exit the thread.
MOVL $0, 0(SP)
CALL runtime·exits(SB)
JMP 0(PC)
// void sigtramp(void *ureg, int8 *note)
TEXT runtime·sigtramp(SB),NOSPLIT,$0
get_tls(AX)
// check that g exists
MOVL g(AX), BX
CMPL BX, $0
JNE 3(PC)
CALL runtime·badsignal2(SB) // will exit
RET
// save args
MOVL ureg+0(FP), CX
MOVL note+4(FP), DX
// change stack
MOVL g_m(BX), BX
MOVL m_gsignal(BX), BP
MOVL (g_stack+stack_hi)(BP), BP
MOVL BP, SP
// make room for args and g
SUBL $24, SP
// save g
MOVL g(AX), BP
MOVL BP, 20(SP)
// g = m->gsignal
MOVL m_gsignal(BX), DI
MOVL DI, g(AX)
// load args and call sighandler
MOVL CX, 0(SP)
MOVL DX, 4(SP)
MOVL BP, 8(SP)
CALL runtime·sighandler(SB)
MOVL 12(SP), AX
// restore g
get_tls(BX)
MOVL 20(SP), BP
MOVL BP, g(BX)
// call noted(AX)
MOVL AX, 0(SP)
CALL runtime·noted(SB)
RET
// Only used by the 64-bit runtime.
TEXT runtime·setfpmasks(SB),NOSPLIT,$0
RET
#define ERRMAX 128 /* from os_plan9.h */
// void errstr(int8 *buf, int32 len)
TEXT errstr<>(SB),NOSPLIT,$0
MOVL $41, AX
INT $64
RET
// func errstr() string
// Only used by package syscall.
// Grab error string due to a syscall made
// in entersyscall mode, without going
// through the allocator (issue 4994).
// See ../syscall/asm_plan9_386.s:/·Syscall/
TEXT runtime·errstr(SB),NOSPLIT,$8-8
get_tls(AX)
MOVL g(AX), BX
MOVL g_m(BX), BX
MOVL (m_mOS+mOS_errstr)(BX), CX
MOVL CX, 0(SP)
MOVL $ERRMAX, 4(SP)
CALL errstr<>(SB)
CALL runtime·findnull(SB)
MOVL 4(SP), AX
MOVL AX, ret_len+4(FP)
MOVL 0(SP), AX
MOVL AX, ret_base+0(FP)
RET
// never called on this platform
TEXT ·sigpanictramp(SB),NOSPLIT,$0-0
UNDEF
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