125 lines
3.7 KiB
NASM
125 lines
3.7 KiB
NASM
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; Copyright Oliver Kowalke 2009.
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; Distributed under the Boost Software License, Version 1.0.
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; (See accompanying file LICENSE_1_0.txt or copy at
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; http://www.boost.org/LICENSE_1_0.txt)
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; ---------------------------------------------------------------------------------
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; | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
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; ---------------------------------------------------------------------------------
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; | 0h | 04h | 08h | 0ch | 010h | 014h | 018h | 01ch |
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; ---------------------------------------------------------------------------------
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; | fc_mxcsr|fc_x87_cw| fc_strg |fc_deallo| limit | base | fc_seh | EDI |
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; ---------------------------------------------------------------------------------
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; ---------------------------------------------------------------------------------
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; | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
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; ---------------------------------------------------------------------------------
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; | 020h | 024h | 028h | 02ch | 030h | 034h | 038h | 03ch |
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; ---------------------------------------------------------------------------------
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; | ESI | EBX | EBP | EIP | to | data | EH NXT |SEH HNDLR|
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; ---------------------------------------------------------------------------------
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.386
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.XMM
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.model flat, c
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.code
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ostd_ontop_fcontext PROC OSTD_CONTEXT_EXPORT
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; prepare stack
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lea esp, [esp-02ch]
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IFNDEF OSTD_USE_TSX
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; save MMX control- and status-word
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stmxcsr [esp]
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; save x87 control-word
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fnstcw [esp+04h]
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ENDIF
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assume fs:nothing
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; load NT_TIB into ECX
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mov edx, fs:[018h]
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assume fs:error
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; load fiber local storage
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mov eax, [edx+010h]
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mov [esp+08h], eax
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; load current deallocation stack
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mov eax, [edx+0e0ch]
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mov [esp+0ch], eax
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; load current stack limit
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mov eax, [edx+08h]
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mov [esp+010h], eax
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; load current stack base
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mov eax, [edx+04h]
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mov [esp+014h], eax
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; load current SEH exception list
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mov eax, [edx]
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mov [esp+018h], eax
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mov [esp+01ch], edi ; save EDI
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mov [esp+020h], esi ; save ESI
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mov [esp+024h], ebx ; save EBX
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mov [esp+028h], ebp ; save EBP
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; store ESP (pointing to context-data) in ECX
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mov ecx, esp
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; first arg of ostd_ontop_fcontext() == fcontext to jump to
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mov eax, [esp+030h]
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; pass parent fcontext_t
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mov [eax+030h], ecx
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; second arg of ostd_ontop_fcontext() == data to be transferred
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mov ecx, [esp+034h]
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; pass data
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mov [eax+034h], ecx
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; third arg of ostd_ontop_fcontext() == ontop-function
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mov ecx, [esp+038h]
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; restore ESP (pointing to context-data) from EAX
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mov esp, eax
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IFNDEF OSTD_USE_TSX
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; restore MMX control- and status-word
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ldmxcsr [esp]
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; restore x87 control-word
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fldcw [esp+04h]
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ENDIF
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assume fs:nothing
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; load NT_TIB into EDX
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mov edx, fs:[018h]
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assume fs:error
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; restore fiber local storage
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mov eax, [esp+08h]
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mov [edx+010h], eax
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; restore current deallocation stack
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mov eax, [esp+0ch]
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mov [edx+0e0ch], eax
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; restore current stack limit
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mov eax, [esp+010h]
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mov [edx+08h], eax
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; restore current stack base
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mov eax, [esp+014h]
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mov [edx+04h], eax
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; restore current SEH exception list
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mov eax, [esp+018h]
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mov [edx], eax
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mov edi, [esp+01ch] ; restore EDI
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mov esi, [esp+020h] ; restore ESI
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mov ebx, [esp+024h] ; restore EBX
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mov ebp, [esp+028h] ; restore EBP
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; prepare stack
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lea esp, [esp+02ch]
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; keep return-address on stack
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; jump to context
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jmp ecx
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ostd_ontop_fcontext ENDP
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END
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