65 lines
1.2 KiB
PHP
65 lines
1.2 KiB
PHP
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reg_eip equ ebp+4
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reg_cs equ ebp+8
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reg_eflags equ ebp+12
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reg_esp equ ebp+16
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reg_ss equ ebp+20
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fpu_ctrl equ ebp-28
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align 4
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except_16:
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push ebp
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mov ebp, esp
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sub esp, 28
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push eax
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push ebx
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push ecx
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push edx
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mov ebx, [ss:CURRENT_TASK]
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shl ebx, 8
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mov eax, [ss:ebx+PROC_BASE+APPDATA.fpu_handler]
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test eax, eax
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jz .default
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mov ecx, [reg_eip]
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mov edx, [reg_esp]
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sub edx, 4
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mov [ss:edx+new_app_base], ecx
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mov [reg_esp], edx
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mov dword [reg_eip], eax
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pop edx
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pop ecx
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pop ebx
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pop eax
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leave
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iretd
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.default:
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fnstenv [fpu_ctrl]
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fnclex
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or word [fpu_ctrl], 0111111b
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fldenv [fpu_ctrl]
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pop edx
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pop ecx
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pop ebx
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pop eax
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leave
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iretd
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restore reg_eip
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restore reg_cs
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restore reg_eflags
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restore reg_esp
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restore reg_ss
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restore fpu_ctrl
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