htle.h

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/* 
 *      HT Editor
 *      htle.h
 *
 *      Copyright (C) 1999-2002 Stefan Weyergraf (stefan@weyergraf.de)
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License version 2 as
 *      published by the Free Software Foundation.
 *
 *      This program is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU General Public License for more details.
 *
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __HTLE_H__
#define __HTLE_H__

#include "htobj.h"
#include "formats.h"
#include "relfile.h"

#include "lestruct.h"
#include "htendian.h"

#define DESC_LE "le - win,os2 linear exe"
#define DESC_LE_HEADER "le/header"
#define DESC_LE_VXD "le/vxd descriptor"
#define DESC_LE_OBJECTS "le/objects"
#define DESC_LE_PAGEMAP "le/page map"
#define DESC_LE_ENTRYPOINTS "le/entrypoints"
#define DESC_LE_IMAGE "le/image"

#define ATOM_LE_FLAGS                   0x4c450000
#define ATOM_LE_FLAGS_STR                "4c450000"

#define ATOM_LE_MACHINE                 0x4c450001
#define ATOM_LE_MACHINE_STR              "4c450001"

#define ATOM_LE_OS                              0x4c450002
#define ATOM_LE_OS_STR                   "4c450002"

#define ATOM_LE_OBJFLAGS                0x4c450003
#define ATOM_LE_OBJFLAGS_STR             "4c450003"

#define ATOM_LE_ENTRY_FLAGS             0x4c450004
#define ATOM_LE_ENTRY_FLAGS_STR  "4c450004"

#define ATOM_LE_ENTRY_BUNDLE_FLAGS              0x4c450005
#define ATOM_LE_ENTRY_BUNDLE_FLAGS_STR   "4c450005"

#define LEAddress uint32

#define LE_ADDR_INVALID 0
#define LE_BASE_ADDR    0x400000

class ht_le_page_file;

struct ht_le_shared_data {
        endianess byteorder;
        dword hdr_ofs;
        LE_HEADER hdr;
        ht_viewer *v_header;
        ht_viewer *v_objects;
        ht_viewer *v_pagemaps;
        ht_viewer *v_image;
        ht_viewer *v_le_vxd;
        ht_le_objmap objmap;
        ht_le_pagemap pagemap;
        bool is_vxd;
        UINT vxd_desc_linear_ofs;
        LE_VXD_DESCRIPTOR vxd_desc;
        ht_le_page_file *linear_file;
        ht_reloc_file *reloc_file;
        LEAddress best_entrypoint;
};

class ht_le: public ht_format_group {
protected:
        bool loc_enum;

                        void check_vxd();
                        void do_fixups();
                        void read_pagemap();
                        void read_objects();
public:
                        void init(bounds *b, ht_streamfile *file, format_viewer_if **ifs, ht_format_group *format_group, FILEOFS h);
        virtual void done();
/* overwritten */
        virtual   void loc_enum_start();
        virtual   bool loc_enum_next(ht_format_loc *loc);
};

extern format_viewer_if htle_if;

/*
 *      CLASS ht_le_page_file
 */

class ht_le_page_file: public ht_layer_streamfile {
protected:
        ht_le_pagemap *pagemap;
        dword pagemapsize;
        dword page_size;
        FILEOFS ofs;
public:
                   void init(ht_streamfile *file, bool own_file, ht_le_pagemap *pagemap, dword pagemapsize, dword page_size);
/* overwritten */
        virtual bool isdirty(FILEOFS offset, UINT range);
        virtual UINT read(void *buf, UINT size);
        virtual int seek(FILEOFS offset);
        virtual FILEOFS tell();
        virtual int vcntl(UINT cmd, va_list vargs);
        virtual UINT write(const void *buf, UINT size);
/* new */
                   bool map_ofs(UINT lofs, FILEOFS *pofs, UINT *maxsize);
                   bool unmap_ofs(FILEOFS pofs, UINT *lofs);
};

/*
 *      CLASS ht_le_reloc_entry
 */

class ht_le_reloc_entry: public Object {
public:
        UINT ofs;       // FIXME: hack
        UINT seg;
        LEAddress addr;
        uint8 address_type;
        uint8 reloc_type;

        ht_le_reloc_entry(UINT ofs, UINT seg, LEAddress addr, uint8 address_type, uint8 reloc_type);
};

/*
 *      CLASS ht_le_reloc_file
 */

class ht_le_reloc_file: public ht_reloc_file {
protected:
        ht_le_shared_data *data;
/* overwritten */
        virtual void    reloc_apply(Object *reloc, byte *data);
        virtual bool    reloc_unapply(Object *reloc, byte *data);
public:
                   void init(ht_streamfile *streamfile, bool own_streamfile, ht_le_shared_data *data);
};

FILEOFS LE_get_seg_ofs(ht_le_shared_data *LE_shared, UINT i);
LEAddress LE_get_seg_addr(ht_le_shared_data *LE_shared, UINT i);
UINT LE_get_seg_psize(ht_le_shared_data *LE_shared, UINT i);
UINT LE_get_seg_vsize(ht_le_shared_data *LE_shared, UINT i);

bool LE_addr_to_segment(ht_le_shared_data *LE_shared, LEAddress Addr, int *segment);
bool LE_addr_is_physical(ht_le_shared_data *LE_shared, LEAddress Addr);
bool LE_addr_to_ofs(ht_le_shared_data *LE_shared, LEAddress Addr, FILEOFS *ofs);

bool LE_ofs_to_addr(ht_le_shared_data *LE_shared, FILEOFS ofs, LEAddress *Addr);

LEAddress LE_MAKE_ADDR(ht_le_shared_data *LE_shared, uint16 seg, uint32 ofs);
uint16 LE_ADDR_SEG(ht_le_shared_data *LE_shared, LEAddress a);
uint32 LE_ADDR_OFS(ht_le_shared_data *LE_shared, LEAddress a);

#endif /* __HTLE_H__ */

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