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128 lines
3.5 KiB
128 lines
3.5 KiB
title "Fiber Switch"
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;++
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;
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; Copyright (c) 2000 Microsoft Corporation
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;
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; Module Name:
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;
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; fiber.asm
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;
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; Abstract:
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;
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; This module implements the platform specific fiber swtich code.
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;
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; Author:
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;
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; David N. Cutler (davec) 7-Jul-2000
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;
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;--
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include ksamd64.inc
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;++
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;
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; VOID
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; SwitchToFiber(
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; PFIBER NewFiber
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; )
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;
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; Routine Description:
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;
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; This function saves the state of the current fiber and switches to the
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; specified fiber.
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;
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; Arguments:
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;
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; NewFiber (rcx) - Supplies the address of the new fiber.
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;
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; Return Value:
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;
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; None
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;
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;--
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LEAF_ENTRY SwitchToFiber, _TEXT$00
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mov rdx, gs:[TeSelf] ; get TEB address
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mov rax, TeFiberData[rdx] ; get current fiber address
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;
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; Set new deallocation stack and fiber data in TEB.
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;
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mov r8, FbDeallocationStack[rcx] ; set deallocation stack address
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mov TeDeallocationStack[rdx], r8 ;
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mov TeFiberData[rdx], rcx ; set new fiber address
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;
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; Save stack limit.
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;
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mov r8, TeStackLimit[rdx] ; save current stack limit
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mov FbStackLimit[rax], r8 ;
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;
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; Save the nonvolitile state of the current fiber.
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;
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lea r8, FbFiberContext[rax] ; get fiber context record address
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mov CxRbx[r8], rbx ; save nonvolatile integer registers
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mov CxRbp[r8], rbp ;
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mov CxRsi[r8], rsi ;
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mov CxRdi[r8], rdi ;
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mov CxR12[r8], r12 ;
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mov CxR13[r8], r13 ;
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mov CxR14[r8], r14 ;
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mov CxR15[r8], r15 ;
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movq CxXmm6[r8], xmm6 ; save nonvolatile floating registers
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movq CxXmm7[r8], xmm7 ;
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movq CxXmm8[r8], xmm8 ;
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movq CxXmm9[r8], xmm9 ;
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movq CxXmm10[r8], xmm10 ;
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movq CxXmm11[r8], xmm11 ;
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movq CxXmm12[r8], xmm12 ;
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movq CxXmm13[r8], xmm13 ;
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movq CxXmm14[r8], xmm14 ;
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movq CxXmm15[r8], xmm15 ;
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mov r9, [rsp] ; save return address
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mov CxRip[r8], r9 ;
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mov CxRsp[r8], rsp ; save stack pointer
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;
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; Restore the new fiber stack base and stack limit.
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;
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mov r8, FbStackBase[rcx] ; restore stack base
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mov TeStackBase[rdx], r8 ;
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mov r8, FbStackLimit[rcx] ; restore stack limit
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mov TeStackLimit[rdx], r8 ;
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;
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; Restore nonvolitile state of the new fiber.
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;
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lea r8, FbFiberContext[rcx] ; get fiber context address
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mov rbx, CxRbx[r8] ; restore nonvolatile integer registers
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mov rbp, CxRbp[r8] ;
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mov rsi, CxRsi[r8] ;
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mov rdi, CxRdi[r8] ;
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mov r12, CxR12[r8] ;
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mov r13, CxR13[r8] ;
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mov r14, CxR14[r8] ;
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mov r15, CxR15[r8] ;
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movq xmm6, CxXmm6[r8] ; restore nonvolatile floating registers
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movq xmm7, CxXmm7[r8] ;
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movq xmm8, CxXmm8[r8] ;
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movq xmm9, CxXmm9[r8] ;
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movq xmm10, CxXmm10[r8] ;
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movq xmm11, CxXmm11[r8] ;
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movq xmm12, CxXmm12[r8] ;
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movq xmm13, CxXmm13[r8] ;
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movq xmm14, CxXmm14[r8] ;
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movq xmm15, CxXmm15[r8] ;
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mov rsp, CxRsp[r8] ; restore stack pointer
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ret ;
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LEAF_END SwitchToFiber, _TEXT$00
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end
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