1 2; Copyright Oliver Kowalke 2009. 3; Distributed under the Boost Software License, Version 1.0. 4; (See accompanying file LICENSE_1_0.txt or copy at 5; http://www.boost.org/LICENSE_1_0.txt) 6 7; --------------------------------------------------------------------------------- 8; | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 9; --------------------------------------------------------------------------------- 10; | 0h | 04h | 08h | 0ch | 010h | 014h | 018h | 01ch | 11; --------------------------------------------------------------------------------- 12; | fc_mxcsr|fc_x87_cw| fc_strg |fc_deallo| limit | base | fc_seh | EDI | 13; --------------------------------------------------------------------------------- 14; --------------------------------------------------------------------------------- 15; | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16; --------------------------------------------------------------------------------- 17; | 020h | 024h | 028h | 02ch | 030h | 034h | 038h | 03ch | 18; --------------------------------------------------------------------------------- 19; | ESI | EBX | EBP | EIP | to | data | EH NXT |SEH HNDLR| 20; --------------------------------------------------------------------------------- 21 22.386 23.XMM 24.model flat, c 25.code 26 27jump_fcontext PROC BOOST_CONTEXT_EXPORT 28 ; prepare stack 29 lea esp, [esp-02ch] 30 31IFNDEF BOOST_USE_TSX 32 ; save MMX control- and status-word 33 stmxcsr [esp] 34 ; save x87 control-word 35 fnstcw [esp+04h] 36ENDIF 37 38 assume fs:nothing 39 ; load NT_TIB into ECX 40 mov edx, fs:[018h] 41 assume fs:error 42 ; load fiber local storage 43 mov eax, [edx+010h] 44 mov [esp+08h], eax 45 ; load current deallocation stack 46 mov eax, [edx+0e0ch] 47 mov [esp+0ch], eax 48 ; load current stack limit 49 mov eax, [edx+08h] 50 mov [esp+010h], eax 51 ; load current stack base 52 mov eax, [edx+04h] 53 mov [esp+014h], eax 54 ; load current SEH exception list 55 mov eax, [edx] 56 mov [esp+018h], eax 57 58 mov [esp+01ch], edi ; save EDI 59 mov [esp+020h], esi ; save ESI 60 mov [esp+024h], ebx ; save EBX 61 mov [esp+028h], ebp ; save EBP 62 63 ; store ESP (pointing to context-data) in EAX 64 mov eax, esp 65 66 ; firstarg of jump_fcontext() == fcontext to jump to 67 mov ecx, [esp+030h] 68 69 ; restore ESP (pointing to context-data) from ECX 70 mov esp, ecx 71 72IFNDEF BOOST_USE_TSX 73 ; restore MMX control- and status-word 74 ldmxcsr [esp] 75 ; restore x87 control-word 76 fldcw [esp+04h] 77ENDIF 78 79 assume fs:nothing 80 ; load NT_TIB into EDX 81 mov edx, fs:[018h] 82 assume fs:error 83 ; restore fiber local storage 84 mov ecx, [esp+08h] 85 mov [edx+010h], ecx 86 ; restore current deallocation stack 87 mov ecx, [esp+0ch] 88 mov [edx+0e0ch], ecx 89 ; restore current stack limit 90 mov ecx, [esp+010h] 91 mov [edx+08h], ecx 92 ; restore current stack base 93 mov ecx, [esp+014h] 94 mov [edx+04h], ecx 95 ; restore current SEH exception list 96 mov ecx, [esp+018h] 97 mov [edx], ecx 98 99 mov ecx, [esp+02ch] ; restore EIP 100 101 mov edi, [esp+01ch] ; restore EDI 102 mov esi, [esp+020h] ; restore ESI 103 mov ebx, [esp+024h] ; restore EBX 104 mov ebp, [esp+028h] ; restore EBP 105 106 ; prepare stack 107 lea esp, [esp+030h] 108 109 ; return transfer_t 110 ; FCTX == EAX, DATA == EDX 111 mov edx, [eax+034h] 112 113 ; jump to context 114 jmp ecx 115jump_fcontext ENDP 116END 117
