/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  Standalone disassembler mainline. 
*
****************************************************************************/


#include <stdlib.h>
#include <string.h>
#include "global.h"
#include "dis.h"
#include "main.h"
#include "init.h"
#include "fini.h"
#include "externs.h"
#include "pass1.h"
#include "pass2.h"
#include "publics.h"
#include "buffer.h"
#include "formasm.h"
#include "hashtabl.h"
#include "pdata.h"
#include "groups.h"
#include "demangle.h"
#if !defined( __WATCOMC__ )
    #include "clibext.h"
#endif

#define SMALL_STRING_LEN        8
#define TMP_TABLE_SIZE          29

wd_options      Options;
char            LabelChar = 0;
char            QuoteChar = '\\';

int             OutputDest;

char *          ObjFileName = NULL;
char *          ListFileName = NULL;

hash_table      HandleToSectionTable;
hash_table      HandleToLabelListTable;
hash_table      HandleToRefListTable;
hash_table      SymbolToLabelTable;
hash_table      NameRecognitionTable;
hash_table      SkipRefTable = NULL;

orl_handle              ORLHnd;
orl_file_handle         ObjFileHnd;
orl_sec_handle          debugHnd;
dis_handle              DHnd;
dis_format_flags        DFormat;

section_list_struct     Sections;
publics_struct          Publics;

static int              flatModel = 0;

extern char *           SourceFileInObject;

static void printUnixHeader( section_ptr sec )
{
    orl_sec_alignment   alignment;
    orl_sec_flags       flags;
    orl_sec_type        type;
    char                attributes[10];
    char *              ca;

    alignment = ORLSecGetAlignment( sec->shnd );
    type = ORLSecGetType( sec->shnd );
    flags = ORLSecGetFlags( sec->shnd );

    ca = attributes;
    if( !(Options & METAWARE_COMPATIBLE) ) {
        if( (flags & ORL_SEC_FLAG_EXEC) || sec->type == SECTION_TYPE_TEXT ) {
            *ca++ = 'c';
        }
        if( (flags & ORL_SEC_FLAG_INITIALIZED_DATA) || sec->type == SECTION_TYPE_DATA || sec->type == SECTION_TYPE_PDATA ) {
            *ca++ = 'd';
        }
        if( (flags & ORL_SEC_FLAG_UNINITIALIZED_DATA) || sec->type == SECTION_TYPE_BSS ) {
            *ca++ = 'u';
        }
        if( (type == ORL_SEC_TYPE_NOTE) || sec->type == SECTION_TYPE_DRECTVE ) {
            *ca++ = 'i';
        }
        if( flags & ORL_SEC_FLAG_DISCARDABLE ) {
            *ca++ = 'n';
        }
        if( flags & ORL_SEC_FLAG_REMOVE ) {
            *ca++ = 'R';
        }
        if( flags & ORL_SEC_FLAG_READ_PERMISSION ) {
            *ca++ = 'r';
        }
        if( flags & ORL_SEC_FLAG_WRITE_PERMISSION ) {
            *ca++ = 'w';
        }
        if( flags & ORL_SEC_FLAG_EXECUTE_PERMISSION ) {
            *ca++ = 'x';
        }
        if( flags & ORL_SEC_FLAG_SHARED ) {
            *ca++ = 's';
        }
        *ca++ = '0' + alignment;
        *ca = '\0';

        if( !( DFormat & DFF_ASM ) ){
            BufferConcat("\t\t\t\t");
        }
        BufferStore(".new_section %s, \"%s\"", sec->name, attributes );
    } else {
        if( !(flags & ORL_SEC_FLAG_REMOVE ) ) {
            *ca++ = 'a';
        }
        if( flags & ORL_SEC_FLAG_EXEC ) {
            *ca++ = 'x';
        }
        if( flags & ORL_SEC_FLAG_WRITE_PERMISSION ) {
            *ca++ = 'w';
        }
        *ca++ = '\0';
        if( !( DFormat & DFF_ASM ) ) {
            BufferConcat("\t\t\t\t");
        }
        BufferStore(".section %s, \"%s\"", sec->name, attributes );
        BufferConcatNL();
        if( !( DFormat & DFF_ASM ) ) {
            BufferConcat("\t\t\t\t");
        }
        BufferStore(".align %d", alignment );
    }

    BufferConcatNL();
    BufferPrint();
}

static char *getAlignment( orl_sec_alignment alignment )
{
    switch( alignment ) {
    case( 0 ):
        return( "BYTE" );
    case( 1 ):
        return( "WORD" );
    case( 2 ):
        return( "DWORD" );
    case( 4 ):
        return( "PARA" );
    case( 8 ):
    case( 12 ):
        return( "PAGE" );
    default:
        return( "" );
    }
}


static char *getUse( orl_sec_flags flags )
{
    if( flags & ORL_SEC_FLAG_USE_32 ) {
        return( "USE32" );
    } else {
        return( "USE16" );
    }
}


static char *getAlloc( orl_sec_combine combine )
{
    switch( combine & ORL_SEC_COMBINE_COMDAT_ALLOC_MASK ) {
    case( ORL_SEC_COMBINE_COMDAT_ALLOC_EXPLIC ):
        return( "EXPLICIT" );
    case( ORL_SEC_COMBINE_COMDAT_ALLOC_CODE16 ):
        return( "CODE16" );
    case( ORL_SEC_COMBINE_COMDAT_ALLOC_CODE32 ):
        return( "CODE32" );
    case( ORL_SEC_COMBINE_COMDAT_ALLOC_DATA16 ):
        return( "DATA16" );
    case( ORL_SEC_COMBINE_COMDAT_ALLOC_DATA32 ):
        return( "DATA32" );
    default:
        return( "" );
    }
}


static char *getPick( orl_sec_combine combine )
{
    switch( combine & ORL_SEC_COMBINE_COMDAT_PICK_MASK ) {
    case( ORL_SEC_COMBINE_COMDAT_PICK_NONE ):
        return( "NONE" );
    case( ORL_SEC_COMBINE_COMDAT_PICK_ANY ):
        return( "ANY" );
    case( ORL_SEC_COMBINE_COMDAT_PICK_SAME ):
        return( "SAME" );
    case( ORL_SEC_COMBINE_COMDAT_PICK_EXACT ):
        return( "EXACT" );
    default:
        return( "" );
    }
}


static char *getCombine( orl_sec_combine combine )
{
    switch( combine & ORL_SEC_COMBINE_MASK ) {
    case( ORL_SEC_COMBINE_PRIVATE ):
        return( "PRIVATE" );
    case( ORL_SEC_COMBINE_PUBLIC ):
        return( "PUBLIC" );
    case( ORL_SEC_COMBINE_STACK ):
        return( "STACK" );
    case( ORL_SEC_COMBINE_COMMON ):
        return( "COMMON" );
    default:
        return( "" );
    }
}


static void printMasmHeader( section_ptr sec )
{
    orl_sec_alignment   alignment;
    orl_sec_flags       flags;
    orl_sec_type        type;
    orl_sec_frame       frame;
    orl_sec_combine     combine;
    orl_sec_size        size;
    char                *name;
    char                *class;
    char                *gname;
    char                *astr;
    orl_sec_handle      sh;
    orl_group_handle    grp = NULL;
    char                comname[ MAX_LINE_LEN ];

    size = ORLSecGetSize( sec->shnd );

    // Load all necessary information
    name = sec->name;
    if( !name ) {
        name = "";
    }
    type = ORLSecGetType( sec->shnd );
    flags = ORLSecGetFlags( sec->shnd );
    frame = ORLSecGetAbsFrame( sec->shnd );

    if( DFormat & DFF_ASM ) {
        class = ORLSecGetClassName( sec->shnd );
        if( !class ) {
            class = "";
        }
        if( flags & ORL_SEC_FLAG_COMDAT ) {
            BufferConcat( "; ERROR: Comdat symbols cannot be assembled." );
        } else if( frame == ORL_SEC_NO_ABS_FRAME ) {
            alignment = ORLSecGetAlignment( sec->shnd );
            combine = ORLSecGetCombine( sec->shnd );
            BufferQuoteName( name );
            BufferStore( "\t\tSEGMENT\t%s %s %s '%s'",
                         getAlignment( alignment ), getCombine( combine ),
                         getUse( flags ), class );
        } else {
            BufferQuoteName( name );
            BufferStore( "\t\tSEGMENT\t at %08X %s '%s'", frame << 4,
                         getUse( flags ), class );
        }
    } else {
        if( flags & ORL_SEC_FLAG_COMDAT ) {
            if( Options & NODEMANGLE_NAMES ) {
                strncpy( comname, name, MAX_LINE_LEN );
            } else {
                __demangle_l( name, 0, comname, MAX_LINE_LEN );
            }
            combine = ORLSecGetCombine( sec->shnd );
            if( ( combine & ORL_SEC_COMBINE_COMDAT_ALLOC_MASK ) ==
                                         ORL_SEC_COMBINE_COMDAT_ALLOC_EXPLIC ) {
                sh = ORLSecGetAssociated( sec->shnd );
                grp = ORLSecGetGroup( sec->shnd );
                astr = "SEGMENT";
            } else {
                sh = NULL;
                alignment = ORLSecGetAlignment( sec->shnd );
                astr = getAlignment( alignment );
            }
            if( sh || grp ) {
                name = NULL;
                gname = NULL;
                if( grp ) {
                    gname = ORLGroupName( grp );
                }
                if( sh ) {
                    name = ORLSecGetName( sh );
                    if( !name ) {
                        if( gname ) {
                            name = gname;
                            gname = NULL;
                        } else {
                            name = "";
                        }
                    }
                } else {
                    name = gname;
                    gname = NULL;
                }
                if( gname ) {
                    BufferStore( "Comdat: %s %s %s '%s:%s' %08X bytes", comname,
                                 astr, getPick( combine ), gname, name, size );
                } else {
                    BufferStore( "Comdat: %s %s %s '%s' %08X bytes", comname,
                                 astr, getPick( combine ), name, size );
                }
            } else {
                BufferStore( "Comdat: %s %s %s %s %08X bytes", name, astr,
                         getPick( combine ), getAlloc( combine ), size );
            }
        } else if( frame == ORL_SEC_NO_ABS_FRAME ) {
            alignment = ORLSecGetAlignment( sec->shnd );
            BufferStore( "Segment: %s %s %s %08X bytes", name,
                         getAlignment( alignment ), getUse( flags ), size );
        } else {
            BufferStore( "Segment: %s at %08X %s %08X bytes", name, frame << 4,
                         getUse( flags ), size );
        }
    }
    BufferConcatNL();
    BufferPrint();
}


void PrintAssumeHeader( section_ptr sec )
{
    orl_group_handle    grp;
    char                *name;

    if( IsMasmOutput() && ( DFormat & DFF_ASM ) ) {
        grp = ORLSecGetGroup( sec->shnd );
        if( grp ) {
            name = ORLGroupName( grp );
        } else {
            name = sec->name;
        }
        BufferStore( "\t\tASSUME CS:%s, DS:DGROUP, SS:DGROUP", name );
        BufferConcatNL();
        BufferPrint();
    }
}


void PrintHeader( section_ptr sec )
{
    if( IsMasmOutput() ) {
        printMasmHeader( sec );
    } else {
        printUnixHeader( sec );
    }
}


void PrintTail( section_ptr sec )
{
    char        *name;

    if( IsMasmOutput() && ( DFormat & DFF_ASM ) ) {
        name = sec->name;
        if( !name ) {
            name = "";
        }
        BufferQuoteName( name );
        BufferStore( "\t\tENDS", name );
        BufferConcatNL();
        BufferPrint();
    }
}


static unsigned DoPrintLinePrefix( void *data, orl_sec_offset off, orl_sec_offset total,
                        unsigned item_size, unsigned len )
{
    unsigned    amount;
    unsigned    done;
    union {
        unsigned_8      u8;
        unsigned_16     u16;
        unsigned_32     u32;
    }           *p;


    if( total >= 0x10000 ) {
        amount = BufferStore( "%08X   ", off );
    } else {
        amount = BufferStore( "%04X   ", off );
    }
    for( done = 0; done < len; done += item_size ) {
        if( off >= total ) {
            item_size = 1;
            BufferConcat( "   " );
        } else {
            p = (void *)((unsigned_8 *)data + off);
            switch( item_size ) {
            case 1:
                amount += BufferStore( " %02X", p->u8 );
                break;
            case 2:
                amount += BufferStore( " %04X", p->u16 );
                break;
            case 4:
                amount += BufferStore( " %08X", p->u32 );
                break;
            }
        }
        off += item_size;
    }
    return( amount );
}

#define PREFIX_SIZE     30

void PrintLinePrefix( void *data, orl_sec_offset off, orl_sec_offset total,
                        unsigned item_size, unsigned len )
{
    unsigned amount;

    amount = DoPrintLinePrefix( data, off, total, item_size, len );
    if( amount >= PREFIX_SIZE ) {
        BufferStore( "\n" );
        amount = 0;
    }
    BufferStore( "%*s ", (PREFIX_SIZE - 1) - amount, "" );
}


static return_val disassembleSection( section_ptr sec, unsigned_8 *contents,
                orl_sec_size size, unsigned pass )
{
    hash_data                   *data_ptr;
    label_list                  sec_label_list;
    ref_list                    sec_ref_list;
    return_val                  error;
    externs                     sec_externs;
    num_errors                  disassembly_errors;

    data_ptr = HashTableQuery( HandleToLabelListTable, (hash_value) sec->shnd );
    if( data_ptr ) {
        sec_label_list = (label_list) *data_ptr;
    } else {
        sec_label_list = NULL;
    }
    data_ptr = HashTableQuery( HandleToRefListTable, (hash_value) sec->shnd );
    if( data_ptr ) {
        sec_ref_list = (ref_list) *data_ptr;
    } else {
        sec_ref_list = NULL;
    }
    if( pass == 1 ) {
        error = DoPass1( sec->shnd, contents, size, sec_ref_list, sec->scan );
        if( error != OKAY ) {
            PrintErrorMsg( error, WHERE_PASS_ONE );
        }
    } else {
        error = OKAY;
        disassembly_errors = DoPass2( sec, contents, size, sec_label_list, sec_ref_list );
        if( !(DFormat & DFF_ASM) ) {
            if( disassembly_errors > 0 ) {
                BufferStore( "%d ", disassembly_errors );
                BufferMsg( DIS_ERRORS );
            } else {
                BufferMsg( NO_DIS_ERRORS );
            }
                 BufferConcatNL();
                 BufferConcatNL();
            BufferPrint();
            if( Options & PRINT_EXTERNS ) {
                sec_externs = CreateExterns( sec_ref_list );
                if( sec_externs ) {
                    PrintExterns( sec_externs );
                    FreeExterns( sec_externs );
                } else {
                    error = OUT_OF_MEMORY;
                    PrintErrorMsg( error, WHERE_GEN_EXTERNS );
                }
            }
        }
    }
    return( error );
}

static label_entry dumpLabel( label_entry l_entry, section_ptr sec,
                              orl_sec_offset loop, orl_sec_offset end )
{
    while( l_entry != NULL
        && ( l_entry->type == LTYP_ABSOLUTE || l_entry->offset <= loop ) ) {
        switch( l_entry->type ){
        case LTYP_ABSOLUTE:
            break;
        case LTYP_UNNAMED:
            PrintLinePrefix( NULL, loop, end, 1, 0 );
            if( loop != l_entry->offset ) {
                BufferStore("%c$%d equ $-%d", LabelChar, l_entry->label.number, loop - l_entry->offset );
            } else {
                BufferStore("%c$%d:", LabelChar, l_entry->label.number );
            }
            BufferConcatNL();
            break;
        case LTYP_SECTION:
        case LTYP_NAMED:
            if( strcmp( l_entry->label.name, sec->name ) == 0 )
                break;
        default:
            PrintLinePrefix( NULL, loop, end, 1, 0 );
            if( loop != l_entry->offset ) {
                BufferStore("%s equ $-%d", l_entry->label.name, loop - l_entry->offset  );
            } else {
                BufferStore("%s:", l_entry->label.name );
            }
            BufferConcatNL();
            break;
        }
        l_entry = l_entry->next;
    }
    return( l_entry );
}

static orl_sec_offset checkForDupLines( unsigned_8 *contents, orl_sec_offset loop,
                                        orl_sec_size size, label_entry l_entry,
                                        ref_entry r_entry )
{
    unsigned_8                  *cmp;
    orl_sec_offset              d;
    unsigned int                lines;

    cmp = &contents[loop - 16];
    if( l_entry && ( l_entry->offset < size ) ) size = l_entry->offset;
    if( r_entry && ( r_entry->offset < size ) ) size = r_entry->offset;
    if( ( size - loop ) < ( 16 * MIN_DUP_LINES ) ) return( 0 );

    for( d = loop; d < ( size - 16 ); d += 16 ) {
        if( memcmp( cmp, &contents[d], 16 ) ) break;
    }
    d -= loop;
    lines = d / 16;
    if( lines < MIN_DUP_LINES ) return( 0 );
    BufferConcatNL();
    BufferStore( "\t--- Above line repeats %d times ---", lines );
    return( d );
}

void DumpDataFromSection( unsigned_8 *contents, orl_sec_offset start,
                          orl_sec_offset end, label_entry *labent,
                          ref_entry *refent, section_ptr sec )
{
    orl_sec_offset              loop;
    unsigned                    loop2;
    unsigned                    amount;
    label_entry                 l_entry;
    ref_entry                   r_entry;

    l_entry = *labent;
    r_entry = *refent;

    for( loop = start; loop < end; ){
        /* Print a label if required */
        l_entry = dumpLabel( l_entry, sec, loop, end );

        if( l_entry != NULL ) {
            amount = l_entry->offset - loop;
            if( amount > 16 ) amount = 16;
        } else {
            amount = 16;
        }
        if( (loop + amount) > end ) amount = end - loop;
        /* Skip over pair relocs */
        while( r_entry && (r_entry->type == ORL_RELOC_TYPE_PAIR ||
                        r_entry->offset < loop) ) {
            r_entry = r_entry->next;
        }
        if( r_entry && r_entry->offset < loop + amount ) {
            if( r_entry->offset == loop ) {
                amount = RelocSize( r_entry );
            } else {
                amount = r_entry->offset - loop;
            }
        }

        /* This is a bit fake.  We want to print a full 16 columns,
           but we only want the amount of data specified, up to 16. */
        DoPrintLinePrefix( contents, loop, loop + amount, 1, 16 );
        BufferConcat( " " );
        if( r_entry && r_entry->offset == loop ) {
            HandleRefInData( r_entry, &(contents[loop]), TRUE );
            loop += amount;
        } else {
            for( loop2 = 0; loop2 < amount; loop2++, loop++ ) {
                if( contents[loop] >= ' ' && contents[loop] <= '~' ) {
                    BufferStore( "%c", contents[loop] );
                } else {
                    BufferConcat( "." );
                }
            }

            // We don't want to display a lot of duplicate lines
            // So we check this here.  We only do this is we have a
            // full 16 bytes displayed per line.
            if( amount == 16 ) {
                loop += checkForDupLines( contents, loop, end, l_entry,
                                          r_entry );
            }
        }
        BufferConcatNL();
        BufferPrint();
    }

    *labent = l_entry;
    *refent = r_entry;
}

static void dumpSection( section_ptr sec, unsigned_8 *contents, orl_sec_size size,
                        unsigned pass )
{
    hash_data                   *data_ptr;
    label_list                  sec_label_list;
    label_entry                 l_entry;
    ref_list                    sec_ref_list;
    ref_entry                   r_entry;

    /* Obtain the Symbol Table */
    data_ptr = HashTableQuery( HandleToLabelListTable, (hash_value) sec->shnd );
    if( data_ptr ) {
        sec_label_list = (label_list) *data_ptr;
        l_entry = sec_label_list->first;
    } else {
        sec_label_list = NULL;
        l_entry = NULL;
    }

    /* Obtain the reloc table */
    data_ptr = HashTableQuery( HandleToRefListTable, (hash_value) sec->shnd );
    if( data_ptr ) {
        sec_ref_list = (ref_list) *data_ptr;
        if( sec_ref_list ) {
            r_entry = sec_ref_list->first;
        }
    } else {
        r_entry = NULL;
    }

    if( pass == 1 ) {
        DoPass1Relocs( contents, r_entry, 0, size );
        return;
    }

    PrintHeader( sec );

    DumpDataFromSection( contents, 0, size, &l_entry, &r_entry, sec );

    if( size > 0 ) {
        l_entry = dumpLabel( l_entry, sec, size, size );
    }

    BufferConcatNL();
    BufferPrint();
}

static void bssSection( section_ptr sec, orl_sec_size size, unsigned pass )
{
    hash_data *                 data_ptr;
    label_list                  sec_label_list;
    label_entry                 l_entry;

    if( pass == 1 )
        return;

    /* Obtain the Symbol Table */
    data_ptr = HashTableQuery( HandleToLabelListTable, (hash_value) sec->shnd );
    if( data_ptr ) {
        sec_label_list = (label_list) *data_ptr;
    } else {
        sec_label_list = NULL;
    }
    l_entry = sec_label_list->first;

    PrintHeader( sec );

    while( l_entry != NULL ){
        switch( l_entry->type ){
        case LTYP_UNNAMED:
            PrintLinePrefix( NULL, l_entry->offset, size, 1, 0 );
            BufferStore("%c$%d:\n", LabelChar, l_entry->label.number );
            break;
        case LTYP_SECTION:
            if( strcmp( l_entry->label.name, sec->name ) == 0 )
                break;
            /* Fall through */
        case LTYP_NAMED:
            PrintLinePrefix( NULL, l_entry->offset, size, 1, 0 );
            BufferStore("%s:\n", l_entry->label.name );
            break;
        }
        BufferPrint();
        l_entry = l_entry->next;
    }
    BufferConcatNL();
    BufferMsg( BSS_SIZE );
    BufferStore(" %d ", size );
    BufferMsg( BYTES );
    BufferConcatNL();
    BufferConcatNL();
    BufferPrint();
}

static return_val DealWithSection( section_ptr sec, unsigned pass )
{
    orl_sec_size        size;
    unsigned_8          *contents;
    return_val          error = OKAY;

    switch( sec->type ) {
    case SECTION_TYPE_TEXT:
        ORLSecGetContents( sec->shnd, &contents );
        size = ORLSecGetSize( sec->shnd );
        error = disassembleSection( sec, contents, size, pass );
        break;
    case SECTION_TYPE_DRECTVE:
    case SECTION_TYPE_DATA:
        ORLSecGetContents( sec->shnd, &contents );
        size = ORLSecGetSize( sec->shnd );
        if( DFormat & DFF_ASM ) {
            error = DumpASMSection( sec, contents, size, pass );
        } else {
            dumpSection( sec, contents, size, pass );
        }
        break;
    case SECTION_TYPE_BSS:
        size = ORLSecGetSize( sec->shnd );
        if( DFormat & DFF_ASM ) {
            error = BssASMSection( sec, size, pass );
        } else {
            bssSection( sec, size, pass );
        }
        break;
    case SECTION_TYPE_PDATA:
        ORLSecGetContents( sec->shnd, &contents );
        size = ORLSecGetSize( sec->shnd );
        error = DumpPDataSection( sec, contents, size, pass );
        break;
    }
    return( error );
}

static void numberUnnamedLabels( label_entry l_entry )
{
    static label_number labNum = 1;

    while( l_entry ) {
        if( l_entry->type == LTYP_UNNAMED ) {
            l_entry->label.number = labNum;
            labNum++;
        }
        l_entry = l_entry->next;
    }
}

static hash_table emitGlobls( void )
{
    section_ptr         sec;
    hash_data *         data_ptr;
    label_list          sec_label_list;
    label_entry         l_entry;
    char                *globl;
    hash_table          hash;
    char                *name;

    hash = HashTableCreate( TMP_TABLE_SIZE, HASH_STRING,
                            (hash_table_comparison_func) strcmp );
    if( !hash ) return( NULL );

    if( IsMasmOutput() ) {
        globl = "\t\tPUBLIC\t";
    } else {
        globl = ".globl\t\t";
    }

    for( sec = Sections.first; sec != NULL; sec = sec->next ) {
        data_ptr = HashTableQuery( HandleToLabelListTable, (hash_value) sec->shnd );
        if( data_ptr != NULL ) {
            sec_label_list = (label_list) *data_ptr;
            if( sec_label_list != NULL ) {
                for( l_entry = sec_label_list->first; l_entry != NULL;
                                                l_entry = l_entry->next ) {
                    name = l_entry->label.name;
                    if( ( l_entry->binding != ORL_SYM_BINDING_LOCAL ) &&
                        (l_entry->type == LTYP_NAMED) &&
                        strcmp( name, sec->name ) ) {
                        BufferConcat( globl );
                        BufferConcat( name );
                        BufferConcatNL();
                        BufferPrint();
                        HashTableInsert(hash,(hash_value)name,(hash_data)name);
                    }
                }
            }
        }
    }
    return( hash );
}

static void emitExtrns( hash_table hash )
{
    section_ptr         sec;
    hash_data           *dp;
    ref_list            r_list;
    ref_entry           r_entry;
    label_entry         l_entry;
    label_list          l_list;
    char                *extrn;
    char                *name;

    if( !hash ) {
        hash = HashTableCreate( TMP_TABLE_SIZE, HASH_STRING,
                                (hash_table_comparison_func) strcmp );
    }

    if( IsMasmOutput() ) {
        extrn = "\t\tEXTRN\t%s:BYTE";
    } else {
        extrn = ".extern\t\t%s";
    }

    for( sec = Sections.first; sec != NULL; sec = sec->next ) {
        dp = HashTableQuery( HandleToRefListTable, (hash_value) sec->shnd );
        if( dp && *dp ) {
            r_list = (ref_list) *dp;
            for( r_entry = r_list->first; r_entry; r_entry = r_entry->next ) {
                if( !r_entry->label->shnd ) {
                    name = r_entry->label->label.name;
                    if( !name ) continue;
                    dp = HashTableQuery( hash, (hash_value)name );
                    if( !dp ) {
                        HashTableInsert( hash, (hash_value)name,
                                         (hash_data)name );
                        if( ( r_entry->label->type != LTYP_GROUP ) &&
                          (r_entry->label->binding != ORL_SYM_BINDING_LOCAL) ) {
                            BufferStore( extrn, name );
                            BufferConcatNL();
                            BufferPrint();
                        }
                    }
                }
            }
        }
    }

    /* emit all externs not used but defined
     */
    dp = HashTableQuery( HandleToLabelListTable, (hash_value) NULL );
    if( dp ) {
        l_list = (label_list) *dp;
        if( l_list ) {
            for( l_entry = l_list->first; l_entry; l_entry = l_entry->next ) {
                name = l_entry->label.name;
                dp = HashTableQuery( hash, (hash_value)name );
                if( !dp ) {
                    HashTableInsert( hash, (hash_value)name, (hash_data)name );
                    if( ( l_entry->binding != ORL_SYM_BINDING_LOCAL ) &&
                        ( l_entry->type == LTYP_EXTERNAL_NAMED ) ) {
                        BufferStore( extrn, name );
                        BufferConcatNL();
                        BufferPrint();
                    }
                }
            }
        }
    }
    HashTableFree( hash );
}

static orl_return       groupWalker( orl_group_handle grp )
{
    char                *name;
    orl_table_index     size;
    orl_table_index     idx;

    name = ORLGroupName( grp );
    size = ORLGroupSize( grp );
    if( !name || ( size < 1 ) ) return( ORL_OKAY );
    DumpASMGroupName( name, ( DFormat & DFF_ASM ) != 0 );
    for( idx = 0; idx < size; idx++ ) {
        name = ORLGroupMember( grp, idx );
        if( name ) {
            DumpASMGroupMember( name );
        }
    }
    DumpASMGroupFini();

    return( ORL_OKAY );
}

void UseFlatModel( void )
{
    if( !flatModel && ( GetMachineType() == ORL_MACHINE_TYPE_I386 ) ) {
        flatModel = 1;
    }
}

static void doPrologue( void )
{
    int         masm;

    masm = IsMasmOutput();

    /* output the listing */
    if( masm ) {
        if( DFormat & DFF_ASM ) {
            BufferConcat( ".387" );
            BufferConcatNL();
            BufferPrint();
            if( GetMachineType() == ORL_MACHINE_TYPE_I386 ) {
                BufferConcat( ".386p" );
                BufferConcatNL();
                BufferPrint();
                if( flatModel ) {
                    BufferConcat( ".model flat" );
                    BufferConcatNL();
                    BufferPrint();
                }
            }
        } else if( SourceFileInObject ) {
            BufferStore( "Module: %s", SourceFileInObject );
            BufferConcatNL();
            BufferPrint();
        }
    }

    if( DFormat & DFF_ASM ) {
        emitExtrns( emitGlobls() );
    }

    if( masm ) {
        ORLGroupsScan( ObjFileHnd, groupWalker );
        if( !( DFormat & DFF_ASM ) ) {
            BufferConcatNL();
        }
    }
}

static void    doEpilogue( void )
{
    if( IsMasmOutput() ) {
        if( DFormat & DFF_ASM ) {
            BufferConcat( "\t\tEND" );
            BufferConcatNL();
            BufferPrint();
        }
    }
}

int main( int argc, char *argv[] )
{
    section_ptr         sec;
    return_val          error;
    hash_data *         data_ptr;
    label_list          sec_label_list;

#if !defined( __WATCOMC__ )
    _argv = argv;
    _argc = argc;
#endif

    Init();
    /* build the symbol table */
    for( sec = Sections.first; sec != NULL; sec = sec->next ) {
        error = DealWithSection( sec, 1 );
        if( error != OKAY ) {
            return( EXIT_FAILURE );
        }
    }
    /* number all the anonymous labels */
    for( sec = Sections.first; sec != NULL; sec = sec->next ) {
        data_ptr = HashTableQuery( HandleToLabelListTable, (hash_value) sec->shnd );
        if( data_ptr != NULL ) {
            sec_label_list = (label_list) *data_ptr;
            if( sec_label_list != NULL ) {
                numberUnnamedLabels( sec_label_list->first );
            }
        }
    }
    doPrologue();
    for( sec = Sections.first; sec != NULL; sec = sec->next ) {
        error = DealWithSection( sec, 2 );
        if( error != OKAY ) {
            return( EXIT_FAILURE );
        }
    }
    doEpilogue();
    if( Options & PRINT_PUBLICS ) {
        PrintPublics();
    }
    Fini();
    return( EXIT_SUCCESS );
}
