Paste: win64 seh
Author: | slava |
Mode: | c++ |
Date: | Thu, 8 Apr 2010 17:27:28 |
Plain Text |
#include "master.hpp"
namespace factor {
typedef unsigned char UBYTE;
const UBYTE UNW_FLAG_EHANDLER = 0x1;
struct UNWIND_INFO {
UBYTE Version:3;
UBYTE Flags:5;
UBYTE SizeOfProlog;
UBYTE CountOfCodes;
UBYTE FrameRegister:4;
UBYTE FrameOffset:4;
ULONG ExceptionHandler;
ULONG ExceptionData[1];
};
struct seh_data {
UNWIND_INFO unwind_info;
RUNTIME_FUNCTION func;
UBYTE handler[32];
};
void factor_vm::c_to_factor_toplevel(cell quot)
{
seh_data *seh_area = (seh_data *)code->seh_area;
cell base = code->seg->start;
seh_area->handler[0] = 0x48;
seh_area->handler[1] = 0xb8;
seh_area->handler[2] = 0x0;
seh_area->handler[3] = 0x0;
seh_area->handler[4] = 0x0;
seh_area->handler[5] = 0x0;
seh_area->handler[6] = 0x0;
seh_area->handler[7] = 0x0;
seh_area->handler[8] = 0x0;
seh_area->handler[9] = 0x0;
seh_area->handler[10] = 0x48;
seh_area->handler[11] = 0xff;
seh_area->handler[12] = 0xe0;
cell handler = (cell)&factor::exception_handler;
memcpy(&seh_area->handler[2],&handler,sizeof(cell));
UNWIND_INFO *unwind_info = &seh_area->unwind_info;
unwind_info->Version = 1;
unwind_info->Flags = UNW_FLAG_EHANDLER;
unwind_info->SizeOfProlog = 0;
unwind_info->CountOfCodes = 0;
unwind_info->FrameRegister = 0;
unwind_info->FrameOffset = 0;
unwind_info->ExceptionHandler = (DWORD)((cell)&seh_area->handler[0] - base);
unwind_info->ExceptionData[0] = 0;
RUNTIME_FUNCTION *func = &seh_area->func;
func->BeginAddress = 0;
func->EndAddress = (DWORD)(code->seg->end - base);
func->UnwindData = (DWORD)((cell)&seh_area->unwind_info - base);
if(!RtlAddFunctionTable(func,1,base))
fatal_error("RtlAddFunctionTable() failed",0);
c_to_factor(quot);
if(!RtlDeleteFunctionTable(func))
fatal_error("RtlDeleteFunctionTable() failed",0);
}
}
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