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omf.c
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omf.c
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/****************************************************************************
*
* 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: handle OMF output format.
*
****************************************************************************/
#include <ctype.h>
#include <time.h>
#include "globals.h"
#include "memalloc.h"
#include "parser.h"
#include "segment.h"
#include "mangle.h"
#include "extern.h"
#include "fixup.h"
#include "omf.h"
#include "omfint.h"
#include "omfspec.h"
#include "fastpass.h"
#include "myassert.h"
#include "tokenize.h" /* needed because of StringBufferEnd usage */
#include "input.h"
#include "linnum.h"
#define SEPARATE_FIXUPP_16_32
#define TRUNCATE 1
#define MANGLE_BYTES 8 /* extra size required for name decoration */
#define MAX_ID_LEN_OMF 247
#if TRUNCATE
#if defined(__UNIX__) || defined(__CYGWIN__) || defined(__DJGPP__)
#include "unistd.h"
#else
#include "io.h"
#endif
#endif
#define TruncRec(objr) (void)( (objr)->length = (objr)->curoff )
enum {
TIME_SEC_B = 0,
TIME_SEC_F = 0x001f,
TIME_MIN_B = 5,
TIME_MIN_F = 0x07e0,
TIME_HOUR_B = 11,
TIME_HOUR_F = 0xf800
};
enum {
DATE_DAY_B = 0,
DATE_DAY_F = 0x001f,
DATE_MON_B = 5,
DATE_MON_F = 0x01e0,
DATE_YEAR_B = 9,
DATE_YEAR_F = 0xfe00
};
union DOS_DATETIME {
struct {
unsigned short time;
unsigned short date;
} dos;
time_t timet;
};
extern void cv_write_debug_tables( struct dsym *, struct dsym *);
extern struct qdesc LinnumQueue; /* queue of line_num_info items */
//extern struct fname_list *FNames;
//extern uint cnt_fnames;
extern const char szNull[];
struct omf_wfile *file_out;
uint_32 LastCodeBufSize;
static unsigned long seg_pos; /* file pos of SEGDEF record(s) */
static unsigned long public_pos; /* file pos of PUBDEF record(s) */
static unsigned long end_of_header; /* file pos of "end of header" */
static const char szCVSymbols[] = { "$$SYMBOLS"};
static const char szCVTypes[] = { "$$TYPES"};
static const char szCVSymClass[] = { "DEBSYM" };
static const char szCVTypClass[] = { "DEBTYP" };
static void InitRec( struct omf_rec *obj, uint_8 command )
/********************************************************/
{
obj->command = command;
obj->data = NULL;
obj->length = 0;
obj->curoff = 0;
obj->is_32 = FALSE;
DebugMsg(("InitRec(%p, %X)\n", obj, command ));
return;
}
static time_t timet2dostime( time_t x )
/*************************************/
{
struct tm * ltime;
union DOS_DATETIME dt;
ltime = localtime( &x );
dt.dos.date = (( ltime->tm_year - 80 ) << DATE_YEAR_B )
| (( ltime->tm_mon + 1 ) << DATE_MON_B )
| (( ltime->tm_mday ) << DATE_DAY_B );
dt.dos.time = (( ltime->tm_hour ) << TIME_HOUR_B )
| (( ltime->tm_min ) << TIME_MIN_B )
| (( ltime->tm_sec / 2 ) << TIME_SEC_B );
return( dt.timet );
}
static void Put8( struct omf_rec *objr, uint_8 byte )
/***************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
objr->data[ objr->curoff++ ] = byte;
}
static void Put16( struct omf_rec *objr, uint_16 word )
/*****************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
WriteU16( objr->data + objr->curoff, word );
objr->curoff += sizeof( uint_16 );
}
static void Put32( struct omf_rec *objr, uint_32 dword )
/******************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
WriteU32( objr->data + objr->curoff, dword );
objr->curoff += sizeof( uint_32 );
}
#if 0
static void PutEither( struct omf_rec *objr, uint_32 data )
/*********************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
if( objr->is_32 ) {
WriteU32( objr->data + objr->curoff, data );
objr->curoff += sizeof( uint_32 );
} else {
WriteU16( objr->data + objr->curoff, data );
objr->curoff += sizeof( uint_16 );
}
}
#endif
static void PutIndex( struct omf_rec *objr, size_t idx )
/******************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
if( idx > 0x7f ) {
objr->data[objr->curoff++] = ( idx >> 8 ) | 0x80;
}
objr->data[objr->curoff++] = idx & 0xff;
}
static void PutData( struct omf_rec *objr, const uint_8 *data, size_t len )
/*************************************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
memcpy( objr->data + objr->curoff, data, len );
objr->curoff += len;
}
static void PutName( struct omf_rec *objr, const char *name, size_t len )
/***********************************************************************/
{
/**/myassert( objr != NULL && objr->data != NULL );
#if MAX_ID_LEN > MAX_ID_LEN_OMF
if ( len > MAX_ID_LEN_OMF ) {
EmitWarn( 1, IDENTIFIER_TOO_LONG );
len = MAX_ID_LEN_OMF;
}
#endif
objr->data[objr->curoff++] = len;
PutData( objr, (uint_8 *)name, len );
}
static void AttachData( struct omf_rec *objr, uint_8 *data, size_t len )
/**********************************************************************/
{
/**/myassert( objr->data == NULL );
objr->data = data;
objr->length = len;
}
#if 0
static void AllocData( struct omf_rec *objr, size_t len )
/*******************************************************/
{
/**/myassert( objr->data == NULL );
objr->data = LclAlloc( len );
objr->length = len;
}
#endif
/* return a group's index */
uint omf_GetGrpIdx( struct asym *sym )
/************************************/
{
if( sym == NULL )
return( 0 );
return( ((struct dsym *)sym)->e.grpinfo->grp_idx );
}
/*
* write OMF comment records about data in code.
*/
void omf_OutSelect( bool is_data )
/********************************/
{
struct omf_rec obj;
char buffer[12];
uint_32 currofs;
int sel_idx;
static uint_32 sel_start; /* start offset of data items */
if( is_data ) {
/* do nothing if it isn't the first data item or
* if current segment isn't code
*/
if( CurrSeg->e.seginfo->data_in_code ||
( CurrSeg->e.seginfo->segtype != SEGTYPE_CODE ) )
return;
sel_start = GetCurrOffset();
CurrSeg->e.seginfo->data_in_code = TRUE;
DebugMsg(("omf_OutSelect: data in code segment (%s), starting at %" FX32 "\n", CurrSeg->sym.name, sel_start ));
} else if ( CurrSeg->e.seginfo->data_in_code ) { /* data items written? */
CurrSeg->e.seginfo->data_in_code = FALSE;
if( write_to_file == TRUE ) {
InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = CMT_TNP;
obj.d.coment.class = CMT_DISASM_DIRECTIVE;
sel_idx = GetSegIdx( &CurrSeg->sym );
//AllocData( objr, 11 ); /* 11 = 1 + 2 + 4 + 4 */
AttachData( &obj, buffer, 11 ); /* 11 = 1 + 2 + 4 + 4 */
currofs = GetCurrOffset();
DebugMsg(("omf_OutSelect: writing coment record about data in code: start=%" FX32 " curofs=%" FX32 "\n", sel_start, currofs ));
if( ( sel_start > 0xffffUL ) || ( currofs > 0xffffUL ) ) {
Put8( &obj, DDIR_SCAN_TABLE_32 );
PutIndex( &obj, sel_idx );
Put32( &obj, sel_start );
Put32( &obj, currofs );
} else {
Put8( &obj, DDIR_SCAN_TABLE );
PutIndex( &obj, sel_idx );
Put16( &obj, sel_start );
Put16( &obj, currofs );
}
TruncRec( &obj );
omf_write_record( &obj );
}
}
}
/* get line numbers for OMF.*/
static int GetLinnumData( struct linnum_data *ldata, bool *need32 )
/*****************************************************************/
{
struct line_num_info *node;
struct line_num_info *next;
int count = 0;
*need32 = FALSE;
for( node = LinnumQueue.head; node; count++, ldata++, node = next ) {
next = node->next;
ldata->number = node->number;
ldata->offset = node->offset;
if( node->offset > 0xffffUL ) {
*need32 = TRUE;
}
LclFree( node );
}
LinnumQueue.head = NULL;
return( count );
}
/* write line number debug info */
void omf_write_linnum( void )
/***************************/
{
int count;
struct omf_rec obj;
bool need_32;
count = GetLinnumData( (struct linnum_data *)StringBufferEnd, &need_32 );
if( count ) {
InitRec( &obj, CMD_LINNUM );
obj.is_32 = need_32;
obj.d.linnum.num_lines = count;
obj.d.linnum.lines = (struct linnum_data *)StringBufferEnd;
obj.d.linnum.d.base.grp_idx = omf_GetGrpIdx( GetGroup( &CurrSeg->sym ) ); /* fixme ? */
obj.d.linnum.d.base.seg_idx = CurrSeg->e.seginfo->seg_idx;
obj.d.linnum.d.base.frame = 0; /* fixme ? */
omf_write_record( &obj );
}
return;
}
#ifdef SEPARATE_FIXUPP_16_32
static void split_fixup_list( struct dsym *seg, struct fixup **fl16, struct fixup **fl32 )
/****************************************************************************************/
{
/* divide fixup record list to the 16-bit or 32-bit list of a fixup record */
struct fixup *fix;
struct fixup *fix16;
struct fixup *fix32;
#ifdef DEBUG_OUT
int cnt16 = 0;
int cnt32 = 0;
#endif
fix16 = NULL;
fix32 = NULL;
for( fix = seg->e.seginfo->FixupListHead; fix; fix = fix->nextrlc ) {
switch( fix->type ) {
case FIX_RELOFF32:
case FIX_OFF32:
case FIX_PTR32:
#ifdef DEBUG_OUT
cnt32++;
#endif
if( fix32 == NULL ) {
*fl32 = fix;
} else {
fix32->nextrlc = fix;
}
fix32 = fix;
break;
default:
#ifdef DEBUG_OUT
cnt16++;
#endif
if( fix16 == NULL ) {
*fl16 = fix;
} else {
fix16->nextrlc = fix;
}
fix16 = fix;
break;
}
}
if( fix32 != NULL ) {
fix32->nextrlc = NULL;
DebugMsg(("split_fixup_list: %u 32-bit fixups\n", cnt32 ));
}
if( fix16 != NULL ) {
fix16->nextrlc = NULL;
DebugMsg(("split_fixup_list: %u 16-bit fixups\n", cnt16 ));
}
}
#else
static int check_need_32bit( struct dsym *seg )
/*********************************************/
{
/* figure out if we need the 16-bit or 32-bit form of a fixup record */
struct fixup *fix;
for( fix = seg->e.seginfo->FixupListHead; fix; fix = fix->nextrlc ) {
switch( fix->loc_method ) {
case FIX_RELOFF32:
case FIX_OFF32:
case FIX_PTR32:
return( 1 );
default:
if( (uint_32)fix->lr.target_offset > 0xffffUL )
return( 1 );
}
}
}
#endif
static void free_fixup( struct fixup *cur )
/*****************************************/
{
struct fixup *next;
while( cur ) {
next = cur->nextrlc;
LclFree( cur );
cur = next;
}
}
/* write an LEDATA record, optionally write fixups */
void omf_write_ledata( struct dsym *seg )
/***************************************/
{
struct omf_rec obj;
uint_32 size;
#ifdef SEPARATE_FIXUPP_16_32
struct fixup *fl16 = NULL;
struct fixup *fl32 = NULL;
#endif
size = seg->e.seginfo->current_loc - seg->e.seginfo->start_loc;
DebugMsg1(( "omf_write_ledata enter, buffer=%p start ofs=%" FX32 ", size=%" FX32 "\n",
seg->e.seginfo->CodeBuffer, seg->e.seginfo->start_loc, size ));
if( size > 0 && write_to_file == TRUE ) {
LastCodeBufSize = size;
InitRec( &obj, CMD_LEDATA );
AttachData( &obj, seg->e.seginfo->CodeBuffer, size );
obj.d.ledata.idx = seg->e.seginfo->seg_idx;
obj.d.ledata.offset = seg->e.seginfo->start_loc;
if( obj.d.ledata.offset > 0xffffUL )
obj.is_32 = TRUE;
omf_write_record( &obj );
/* process Fixup, if any */
if( seg->e.seginfo->FixupListHead != NULL ) {
DebugMsg(( "omf_write_ledata: write fixups\n" ));
#ifdef SEPARATE_FIXUPP_16_32
split_fixup_list( seg, &fl16, &fl32 );
/* Process Fixup, if any */
if( fl16 != NULL ) {
InitRec( &obj, CMD_FIXUP );
obj.is_32 = FALSE;
obj.d.fixup.fixup = fl16;
omf_write_record( &obj );
free_fixup( fl16 );
}
if( fl32 != NULL ) {
InitRec( &obj, CMD_FIXUP );
obj.is_32 = TRUE;
obj.d.fixup.fixup = fl32;
omf_write_record( &obj );
free_fixup( fl32 );
}
#else
InitRec( &obj, CMD_FIXUP );
obj.d.fixup.fixup = seg->e.seginfo->FixupListHead;
check_need_32bit( &obj );
omf_write_record( &obj );
free_fixup( obj.d.fixup.fixup );
#endif
seg->e.seginfo->FixupListHead = seg->e.seginfo->FixupListTail = NULL;
}
}
seg->e.seginfo->start_loc = seg->e.seginfo->current_loc;
}
/*
* flush current segment.
* write_to_file is always TRUE here
*/
void omf_FlushCurrSeg( void )
/***************************/
{
//unsigned i;
//unsigned size;
DebugMsg1(( "omf_FlushCurrSeg enter, CurrSeg=%s\n", CurrSeg ? CurrSeg->sym.name : "NULL" ));
omf_write_ledata( CurrSeg );
/* add line numbers if debugging info is desired */
//if( write_to_file && Options.line_numbers ) {
if( Options.line_numbers ) {
omf_write_linnum();
}
//if ( Options.no_comment_data_in_code_records == FALSE )
// omf_OutSelect( FALSE );
return;
}
/*------------------------------------------------------*/
void omf_end_of_pass1( void )
/***************************/
{
struct omf_rec obj;
InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = 0x00;
obj.d.coment.class = CMT_MS_END_PASS_1;
AttachData( &obj, (uint_8 *)"\x001", 1 );
omf_write_record( &obj );
end_of_header = ftell( file_out->file );
}
void omf_set_filepos( void )
/**************************/
{
DebugMsg(( "omf_set_filepos: reset file pos to %X\n", end_of_header ));
fseek( file_out->file, end_of_header, SEEK_SET );
}
void omf_write_dosseg( void )
/***************************/
{
struct omf_rec obj;
InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = CMT_TNP;
obj.d.coment.class = CMT_DOSSEG;
AttachData( &obj, (uint_8 *)"", 0 );
omf_write_record( &obj );
}
void omf_write_lib( void )
/************************/
{
struct omf_rec obj;
struct qnode *curr;
struct qnode *next;
char *name;
DebugMsg(("omf_write_lib() enter\n"));
for( curr = ModuleInfo.g.LibQueue.head; curr; curr = next ) {
next = curr->next;
name = (char *)curr->elmt;
InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = CMT_TNP;
obj.d.coment.class = CMT_DEFAULT_LIBRARY;
AttachData( &obj, (uint_8 *)name, strlen( name ) );
omf_write_record( &obj );
}
DebugMsg(("omf_write_lib() exit\n"));
}
/* subtypes for CMD_COMENT, comment class 0xA0 (CMT_DLL_ENTRY) */
enum omf_ext_subtype {
CMT_EXT_IMPDEF = 0x01, /* imported names, MS ext for OS/2 and Windows */
CMT_EXT_EXPDEF = 0x02, /* exported names, MS ext */
CMT_EXT_INCDEF = 0x03,
CMT_EXT_PMLIB = 0x04,
CMT_EXT_LNKDIR = 0x05,
CMT_EXT_BIGEND = 0x06,
CMT_EXT_PRECOMP = 0x07,
};
void omf_write_export( void )
/***************************/
{
uint_8 parmcnt;
struct dsym *dir;
struct dsym *parm;
struct omf_rec obj;
int len;
//char *name;
char buffer[MAX_ID_LEN + MANGLE_BYTES + 1 + 4];
for( dir = SymTables[TAB_PROC].head; dir != NULL; dir = dir->nextproc ) {
if( dir->e.procinfo->export ) {
InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = 0x00;
obj.d.coment.class = CMT_DLL_ENTRY;
if ( Options.no_export_decoration == FALSE )
len = Mangle( &dir->sym, buffer+3 );
else {
strcpy( buffer+3, dir->sym.name );
len = dir->sym.name_size;
}
#if MAX_ID_LEN > 255
if ( len > 255 )
len = 255; /* restrict name to 255 chars */
#endif
AttachData( &obj, buffer, len + 4 );
Put8( &obj, CMT_EXT_EXPDEF );
/* write the "Exported Flag" byte:
* bits 0-4: parameter count
* bit 5: no data (entry doesn't use initialized data )
* bit 6: resident (name should be kept resident)
* bit 7: ordinal ( if 1, 2 byte index must follow name)
*/
for ( parm = dir->e.procinfo->paralist, parmcnt = 0; parm; parm = parm->nextparam, parmcnt++ );
parmcnt &= 0x1F; /* ensure bits 5-7 are still 0 */
Put8( &obj, parmcnt ); /* v2.01: changed from fix 0x00 */
//PutName( &obj, buffer, strlen( buffer ) );
Put8( &obj, len );
obj.curoff += len;
Put8( &obj, 0 );
omf_write_record( &obj );
}
}
}
/* write OMF GRPDEF records */
void omf_write_grp( void )
/************************/
{
struct dsym *curr;
struct dsym *segminfo;
struct seg_item *seg;
struct omf_rec grp;
//char writeseg;
DebugMsg(("omf_write_grp enter\n"));
//line_num = LineNumber;
/* size of group records may exceed 1024! */
for( curr = SymTables[TAB_GRP].head; curr; curr = curr->next ) {
InitRec( &grp, CMD_GRPDEF );
grp.d.grpdef.idx = curr->e.grpinfo->grp_idx;
/* we might need:
* - 1 or 2 bytes for the group name index
* - 2 or 3 bytes for each segment in the group
*/
AttachData( &grp, StringBufferEnd, 2 + 3 * curr->e.grpinfo->numseg );
/* v2.01: the LName index of the group may be > 0xff */
/* v2.03: use the group index directly */
PutIndex( &grp, curr->e.grpinfo->lname_idx );
for( seg = curr->e.grpinfo->seglist; seg; seg = seg->next ) {
//writeseg = TRUE;
segminfo = (struct dsym *)(seg->seg);
Put8( &grp, GRP_SEGIDX );
PutIndex( &grp, segminfo->e.seginfo->seg_idx );
/* truncate the group record if it comes near 4096! */
if ( grp.curoff > OBJ_BUFFER_SIZE - 10 ) {
EmitWarn( 2, GROUP_DEFINITION_TOO_LARGE, curr->sym.name );
break;
}
}
TruncRec( &grp );
omf_write_record( &grp );
}
DebugMsg(("omf_write_grp exit\n"));
}
/* write segment table.
* This is done after pass 1.
* There might exist entries of undefined segments in
* the segment list!
*/
void omf_write_seg( bool initial )
/********************************/
{
struct dsym *curr;
struct omf_rec obj;
uint seg_index;
uint_8 buffer[4];
DebugMsg(("omf_write_seg enter\n"));
/* in pass one, save current file pos */
if ( initial ) {
seg_pos = ftell( file_out->file );
} else {
fseek( file_out->file , seg_pos, SEEK_SET );
}
for( curr = SymTables[TAB_SEG].head; curr; curr = curr->next ) {
seg_index = GetSegIdx( &curr->sym );
InitRec( &obj, CMD_SEGDEF );
if ( curr->e.seginfo->Ofssize > USE16 ) {
obj.is_32 = ( curr->e.seginfo->force32 || ( curr->sym.max_offset >= 0x10000 ) );
} else {
obj.is_32 = FALSE;
}
obj.d.segdef.seg_length = curr->sym.max_offset;
switch ( curr->e.seginfo->alignment ) {
case 1:
obj.d.segdef.align = SEGDEF_ALIGN_WORD;
break;
case 2:
obj.d.segdef.align = SEGDEF_ALIGN_DWORD;
break;
case 4:
obj.d.segdef.align = SEGDEF_ALIGN_PARA;
break;
case 8:
obj.d.segdef.align = SEGDEF_ALIGN_PAGE;
break;
#if PAGE4K
case 12: /* this is probably invalid for MS OMF */
obj.d.segdef.align = SEGDEF_ALIGN_4KPAGE;
break;
#endif
case MAX_SEGALIGNMENT:
obj.d.segdef.align = SEGDEF_ALIGN_ABS;
break;
default:
obj.d.segdef.align = SEGDEF_ALIGN_BYTE;
break;
}
obj.d.segdef.use_32 = ( curr->e.seginfo->Ofssize > USE16 );
obj.d.segdef.ovl_name_idx = 1;
/* v2.03: store index directly */
obj.d.segdef.seg_name_idx = curr->e.seginfo->lname_idx;
obj.d.segdef.combine = curr->e.seginfo->combine;
obj.d.segdef.idx = curr->e.seginfo->seg_idx;
obj.d.segdef.class_name_idx = curr->e.seginfo->class_name_idx;
obj.d.segdef.abs.frame = curr->e.seginfo->abs_frame;
obj.d.segdef.abs.offset = curr->e.seginfo->abs_offset;
omf_write_record( &obj );
DebugMsg(("omf_write_seg(%u): %s, len=%" FX32 " seg_idx=%u class_idx=%u ovl_idx=%u align=%u comb=%u use32=%u\n",
seg_index,
curr->sym.name,
obj.d.segdef.seg_length,
obj.d.segdef.seg_name_idx,
obj.d.segdef.class_name_idx,
obj.d.segdef.ovl_name_idx,
obj.d.segdef.align,
obj.d.segdef.combine,
obj.d.segdef.use_32
));
/* write a comment for the linker.
* this is something not done by Masm, it has
* been inherited from Wasm.
*/
if( curr->e.seginfo->segtype == SEGTYPE_CODE && Options.no_opt_farcall == FALSE ) {
InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = CMT_TNP;
obj.d.coment.class = CMT_LINKER_DIRECTIVE;
AttachData( &obj, buffer, 3 );
Put8( &obj, LDIR_OPT_FAR_CALLS );
PutIndex( &obj, seg_index );
/* v2.04: added. cut off the 3. byte if not needed */
TruncRec( &obj );
omf_write_record( &obj );
}
}
DebugMsg(("omf_write_seg exit\n"));
}
static struct asym * GetLnameData( void **pq )
/********************************************/
{
struct qnode *curr = *pq;
if ( curr == NULL ) {
curr = ModuleInfo.g.LnameQueue.head;
} else {
curr = curr->next;
}
*pq = curr;
if ( curr )
return( (struct asym *)(curr->elmt) );
return( NULL );
}
/* the lnames are stored in a queue. read
* the items one by one and take care that
* the record size doesn't exceed 1024 bytes.
*/
#define MAX_LNAME_SIZE 1024
void omf_write_lnames( void )
/***************************/
{
struct omf_rec obj;
int size;
int items;
int startitem;
char *p;
void *pv = NULL;
struct asym *sym;
char buffer[MAX_LNAME_SIZE];
DebugMsg(("omf_write_lnames() enter\n"));
p = buffer;
*p++ = NULLC; /* start with the NULL entry */
items = 1;
startitem = 1;
for (;;) {
sym = GetLnameData( &pv );
size = p - buffer;
/* v2.04: changed extra bytes from 1 to 4 (CMD, RECLEN, CHKSUM) */
//if ( sym == NULL || ( ( size + sym->name_size + 1 ) > MAX_LNAME_SIZE )) {
if ( sym == NULL || ( ( size + sym->name_size + 4 ) > MAX_LNAME_SIZE )) {
if( size ) {
InitRec( &obj, CMD_LNAMES );
/* first_idx and num_names are NOT
* written to the LNAMES record!
* In fact, they aren't used at all.
*/
obj.d.lnames.first_idx = startitem;
obj.d.lnames.num_names = items;
AttachData( &obj, buffer, size );
omf_write_record( &obj );
startitem = items;
}
if ( sym == NULL )
break;
p = buffer;
}
*p++ = (char)sym->name_size;
/* copy 1 byte more - the NULLC - for _strupr() */
memcpy( p, sym->name, sym->name_size + 1 );
/* lnames are converted for casemaps ALL and NOTPUBLIC */
if ( ModuleInfo.case_sensitive == FALSE )
_strupr( p );
DebugMsg(("omf_write_lnames: %u=%s\n", items, p ));
p += sym->name_size; /* overwrite the null char */
items++;
};
DebugMsg(("omf_write_lnames() exit\n"));
}
struct readext {
struct dsym *p;
uint_16 index;
uint_8 method;
};
/* read items for EXTDEF records.
* there are 2 sources:
* - the TAB_EXT queue of externals
* - the AltQueue of weak externals
*/
static struct asym *GetExt( struct readext *r )
/*********************************************/
{
if ( r->method == 0 ) {
do {
if ( r->p == NULL )
r->p = SymTables[TAB_EXT].head;
else
r->p = r->p->next;
if ( r->p ) {
if ( r->p->sym.state == SYM_EXTERNAL &&
( r->p->sym.iscomm == TRUE ) || ( r->p->sym.weak == TRUE ) )
continue;
r->p->sym.included = TRUE;
r->index++;
return( (struct asym *)r->p );
}
} while ( r->p );
r->method++;
}
do {
if ( r->p == NULL )
r->p = ModuleInfo.g.AltQueue.head;
else
r->p = r->p->nextext;
if ( r->p ) {
if ( r->p->sym.altname->included )
continue;
r->index++;
r->p->sym.altname->ext_idx = r->index;
r->p->sym.altname->included = TRUE;
return( r->p->sym.altname );
}
} while ( r->p );
return( NULL );
}
/* write EXTDEF records */
void omf_write_extdef( void )
/***************************/
{
struct omf_rec obj;
struct asym *sym;
struct dsym *dir;
uint rec_size;
uint len;
struct readext r;
char name[MAX_EXT_LENGTH];
char buffer[MAX_ID_LEN + MANGLE_BYTES + 1];
DebugMsg(("omf_write_extdef enter\n"));
r.p = NULL;
r.method = 0;
r.index = 0;
InitRec( &obj, CMD_EXTDEF );
obj.d.extdef.first_idx = 0;
obj.d.extdef.num_names = 0;
rec_size = 0;
/* scan the EXTERN/EXTERNDEF items */
while ( 1 ) {
sym = GetExt( &r );
if ( sym == NULL )
break;
//DebugMsg(("omf_write_extdef: %s, weak=%u, used=%u\n", curr->sym.name, curr->sym.weak, curr->sym.used ));
DebugMsg(("omf_write_extdef: %s\n", sym->name));
len = Mangle( sym, buffer );
#if MAX_ID_LEN > 255
if ( len > 255 )
len = 255; /* length is 1 byte only */
#endif
if ( ModuleInfo.convert_uppercase )
_strupr( buffer );
if( rec_size + len + 2 >= MAX_EXT_LENGTH ) {
DebugMsg(("omf_write_extdef: write record, names=%u, size=%u, MAX=%u\n", obj.d.extdef.num_names, rec_size, MAX_EXT_LENGTH ));
AttachData( &obj, (uint_8 *)name, rec_size );
omf_write_record( &obj );
InitRec( &obj, CMD_EXTDEF );
obj.d.extdef.first_idx += obj.d.extdef.num_names;
obj.d.extdef.num_names = 0;
rec_size = 0;
}
obj.d.extdef.num_names++;
name[rec_size++] = (char)len;
memcpy( name + rec_size, buffer, len );
rec_size += len;
name[rec_size++] = 0; /* for the type index */
}
if( rec_size != 0 ) {
DebugMsg(("omf_write_extdef: write record, names=%u, size=%u, MAX=%u\n", obj.d.extdef.num_names, rec_size, MAX_EXT_LENGTH ));
AttachData( &obj, (uint_8 *)name, rec_size );
omf_write_record( &obj );
}
/* v2.04: write WKEXT coment records */
for ( dir = ModuleInfo.g.AltQueue.head; dir; dir = dir->nextext ) {
InitRec( &obj, CMD_COMENT );
obj.d.coment.attr = CMT_TNP;
obj.d.coment.class = CMT_WKEXT;
AttachData( &obj, buffer, 4 );
PutIndex( &obj, dir->sym.ext_idx );
PutIndex( &obj, dir->sym.altname->ext_idx );
TruncRec( &obj );
omf_write_record( &obj );
}
/* v2.05: clear the index field again */
for ( dir = ModuleInfo.g.AltQueue.head; dir; dir = dir->nextext )
dir->sym.altname->ext_idx = 0;
DebugMsg(("omf_write_extdef exit\n"));
return;
}
#define THREE_BYTE_MAX ( (1UL << 24) - 1 )
static int get_size_of_comdef_number( unsigned long value )
/*********************************************************/
{
/* The spec allows up to 128 in a one byte size field, but lots
of software has problems with that, so we'll restrict ourselves
to 127.
*/
if( value < 128 ) {
return( 1 ); /* 1 byte value */
} else if( value <= USHRT_MAX ) {
return( 3 ); /* 1 byte flag + 2 byte value */
} else if( value <= THREE_BYTE_MAX ) {
return( 4 ); /* 1 byte flag + 3 byte value */