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coff.c
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/****************************************************************************
*
* This code is Public Domain.
*
* ========================================================================
*
* Description: COFF output routines
*
****************************************************************************/
#include <ctype.h>
#include <time.h>
#include "globals.h"
#include "memalloc.h"
#include "mangle.h"
#include "parser.h"
#include "fixup.h"
#include "segment.h"
#include "extern.h"
#include "coff.h"
#include "coffspec.h"
#include "input.h"
#include "myassert.h"
#include "omfspec.h"
#include "linnum.h"
#if COFF_SUPPORT
#define HELPSYMS 0 /* use helper symbols for assembly time symbol refs */
#define MANGLE_BYTES 8 /* extra size required for name decoration */
/* v2.04: to make JWasm always add static (=private) procs to the symbol table
* set STATIC_PROCS to 1. Normally those procs are only added if line
* number/symbolic debugging information is generated.
*/
#define STATIC_PROCS 1 /* v2.10: changed to 1, because Masm 6-10 DOES add static procs */
#define COMPID 0 /* 1=add comp.id absolute symbol */
/* size of codeview temp segment buffer; prior to v2.12 it was 1024 - but this may be
* insufficient if MAX_ID_LEN has been enlarged.
*/
#define SIZE_CV_SEGBUF ( MAX_LINE_LEN * 2 )
struct stringitem {
struct stringitem *next;
char string[1];
};
extern void cv_write_debug_tables( struct dsym *, struct dsym *, void * );
enum dbgseg_index {
DBGS_SYMBOLS,
DBGS_TYPES,
DBGS_MAX
};
struct dbg_section {
//const char *name;
struct dsym *seg;
struct qdesc q;
};
/* -Zi option section info */
static const char * const SymDebName[DBGS_MAX] = { ".debug$S", ".debug$T" };
/* v2.12: all coff global variables replaced by struct coffmod */
struct coffmod {
struct dsym *directives; /* .drectve section, contains linker directives */
struct dsym *sxdata; /* section for safe exception handler data */
struct asym *lastproc; /* used if -Zd is set */
char *dot_file_value;/* value of .file symbol (isn't written by Masm v8+) */
uint_32 start_data; /* file position of start section data */
uint_32 size_data; /* total of section contents (incl relocs + linnums) */
uint_32 start_files; /* symbol table index of first .file entry used by line number info */
uint_32 sectionstart; /* symbol table index of first section */
struct dbg_section SymDeb[DBGS_MAX]; /* codeview debug sections */
struct {
struct stringitem *head;
struct stringitem *tail;
uint_32 size;
} LongNames;
#ifdef DEBUG_OUT
uint_32 start_symtab; /* calculated start of symbol table when section table is written */
#endif
};
static const char szdrectve[] = { ".drectve" };
static const IMAGE_SYMBOL isFeat00 = {
{"@feat.00"},
1,
IMAGE_SYM_ABSOLUTE,
IMAGE_SYM_TYPE_NULL,
IMAGE_SYM_CLASS_STATIC,
0
};
#if COMPID
static const IMAGE_SYMBOL isCompId = {
{"@comp.id"},
//8803 + ( 0x2a << 16 ), /* value of Masm v6.15.8803 */
//9466 + ( 0x40 << 16 ), /* value of Masm v7.00.9466 */
50727 + ( 0x7d << 16 ), /* value of Masm v8.00.50727.104 */
//30729 + ( 0x95 << 16 ), /* value of Masm v9.00.30729.01 */
//30319 + ( 0x9e << 16 ), /* value of Masm v10.00.30319.01 */
IMAGE_SYM_ABSOLUTE,
IMAGE_SYM_TYPE_NULL,
IMAGE_SYM_CLASS_STATIC,
0 /* # of aux symbols */
};
#endif
/* alloc a string which will be stored in the COFF string table */
static uint_32 Coff_AllocString( struct coffmod *cm, const char *string, int len )
/********************************************************************************/
{
struct stringitem *name;
uint_32 oldsize = cm->LongNames.size;
cm->LongNames.size += len + 1;
name = LclAlloc( len + sizeof( struct stringitem ) );
name->next = NULL;
strcpy( name->string, string );
if ( cm->LongNames.head ) {
cm->LongNames.tail->next = name;
cm->LongNames.tail = name;
} else {
cm->LongNames.head = cm->LongNames.tail = name;
}
return( oldsize );
}
/* return number of line number items */
static unsigned GetLinnumItems( struct qdesc *q )
/***********************************************/
{
unsigned i;
struct line_num_info *curr;
for ( i = 0, curr = q->head; curr; i++, curr = curr->next );
return( i );
}
/* write COFF section table */
static ret_code coff_write_section_table( struct module_info *modinfo, struct coffmod *cm )
/*****************************************************************************************/
{
struct dsym *curr;
struct fixup *fix;
uint_32 fileoffset; /* calculated file offset for section data, relocs and linenumber info */
unsigned len;
char *secname;
//struct omf_rec *objr;
//char *p;
//uint size_relocs = 0;
enum seg_type segtype;
struct IMAGE_SECTION_HEADER ish;
char buffer[MAX_ID_LEN+1];
DebugMsg(("coff_write_section_table: enter, sections=%u\n", modinfo->g.num_segs ));
fileoffset = sizeof( struct IMAGE_FILE_HEADER ) + modinfo->g.num_segs * sizeof( struct IMAGE_SECTION_HEADER );
cm->start_data = fileoffset;
for( curr = SymTables[TAB_SEG].head; curr; curr = curr->next ) {
/* v2.04: can't happen */
//if( curr->sym.state != SYM_SEG ) {
// EmitErr( SEGMENT_NOT_DEFINED, curr->sym.name );
// continue;
//}
segtype = SEGTYPE_UNDEF;
/* v2.07: prefer ALIAS name if defined. */
secname = ( curr->e.seginfo->aliasname ? curr->e.seginfo->aliasname : ConvertSectionName( &curr->sym, &segtype, buffer ) );
len = strlen( secname );
/* if section name is longer than 8 chars, a '/' is stored,
followed by a number in ascii which is the offset for the string table
*/
if ( len <= IMAGE_SIZEOF_SHORT_NAME )
strncpy( ish.Name, secname, IMAGE_SIZEOF_SHORT_NAME );
else
sprintf( ish.Name, "/%u", Coff_AllocString( cm, secname, len ) );
/* v2.04: what is the old line supposed to do? */
//ish.Misc.PhysicalAddress = fileoffset - (size_relocs + sizeof(struct IMAGE_FILE_HEADER) + ModuleInfo->g.num_segs * sizeof(struct IMAGE_SECTION_HEADER));
ish.Misc.PhysicalAddress = 0;
ish.VirtualAddress = 0;
ish.SizeOfRawData = curr->sym.max_offset;
ish.PointerToRawData = ( ish.SizeOfRawData ? fileoffset : 0 );
ish.PointerToRelocations = 0;
ish.PointerToLinenumbers = 0;
ish.NumberOfRelocations = 0;
ish.NumberOfLinenumbers = 0;
ish.Characteristics = 0;
/* set field Characteristics; optionally reset PointerToRawData/SizeOfRawData */
if ( curr->e.seginfo->info ) {
/* v2.09: set "remove" flag for .drectve section, as it was done in v2.06 and earlier */
if ( curr == cm->directives )
ish.Characteristics = ( IMAGE_SCN_LNK_INFO | IMAGE_SCN_LNK_REMOVE );
else
ish.Characteristics = ( IMAGE_SCN_LNK_INFO | IMAGE_SCN_CNT_INITIALIZED_DATA );
} else {
if ( curr->e.seginfo->alignment != MAX_SEGALIGNMENT ) /* ABS not possible */
ish.Characteristics |= (uint_32)(curr->e.seginfo->alignment + 1) << 20;
#if COMDATSUPP
if ( curr->e.seginfo->comdat_selection )
ish.Characteristics |= IMAGE_SCN_LNK_COMDAT;
#endif
if ( curr->e.seginfo->segtype == SEGTYPE_CODE ) {
ish.Characteristics |= IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ;
} else if ( curr->e.seginfo->readonly ) {
ish.Characteristics |= IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ;
} else if ( curr->e.seginfo->clsym && strcmp( curr->e.seginfo->clsym->name, "CONST" ) == 0 ) {
ish.Characteristics |= IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ;
} else if ( curr->e.seginfo->segtype == SEGTYPE_BSS || segtype == SEGTYPE_BSS ) {
/* v2.12: if segtype is bss, ensure that seginfo->segtype is also bss; else
* the segment might be written in coff_write_data().
*/
curr->e.seginfo->segtype = SEGTYPE_BSS;
ish.Characteristics |= IMAGE_SCN_CNT_UNINITIALIZED_DATA | IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE;
/* ish.SizeOfRawData = 0; */
ish.PointerToRawData = 0;
} else if ( curr->e.seginfo->combine == COMB_STACK && curr->e.seginfo->bytes_written == 0 ) {
ish.Characteristics |= IMAGE_SCN_CNT_UNINITIALIZED_DATA | IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE;
ish.SizeOfRawData = 0;
ish.PointerToRawData = 0;
} else
ish.Characteristics |= IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE;
}
/* manual characteristics set? */
if ( curr->e.seginfo->characteristics ) {
ish.Characteristics &= 0x1FFFFFF; /* clear the IMAGE_SCN_MEM flags */
ish.Characteristics |= (uint_32)(curr->e.seginfo->characteristics & 0xFE) << 24;
/* the INFO bit (bit 0) needs special handling! */
//if ( curr->e.seginfo->characteristics & 1 )
// ish.Characteristics |= IMAGE_SCN_LNK_INFO;
}
if ( ish.PointerToRawData )
fileoffset += ish.SizeOfRawData;
/* set fields PointerToRelocations/NumberOfRelocations; update 'fileoffset'.
* v2.10: don't use the 16-bit NumberOfRelocations member to count relocs!
* if the true number of relocs doesn't fit in 16-bits, set the appropriate
* flag in the section header!
*/
if ( curr->e.seginfo->FixupList.head ) {
for ( fix = curr->e.seginfo->FixupList.head; fix ; fix = fix->nextrlc ) {
//printf("segment %s, reloc.sym=%s\n", curr->sym.name, fix->sym ? fix->sym : "NULL" );
if ( fix->sym == NULL ) {
#if AMD64_SUPPORT
if ( fix->type == FIX_RELOFF32 ) {
uint_32 *cp = (uint_32 *)( curr->e.seginfo->CodeBuffer + (fix->locofs - curr->e.seginfo->start_loc ));
uint_32 src = fix->locofs + fix->addbytes;
(*cp) -= src;
}
#endif
fix->type = FIX_VOID;
continue;
}
curr->e.seginfo->num_relocs++;
}
fileoffset = (fileoffset + 1) & ~1;
ish.PointerToRelocations = fileoffset;
/* v2.10: handle the "relocs overflow"-case */
fileoffset += curr->e.seginfo->num_relocs * sizeof( IMAGE_RELOCATION );
if ( curr->e.seginfo->num_relocs <= 0xffff ) {
ish.NumberOfRelocations = (uint_16)curr->e.seginfo->num_relocs;
} else {
DebugMsg(( "coff_write_section_table(%s): %" I32_SPEC "u fixups (more than 0xffff!)!\n", curr->sym.name, curr->e.seginfo->num_relocs ));
ish.NumberOfRelocations = 0xffff;
ish.Characteristics |= IMAGE_SCN_LNK_NRELOC_OVFL;
/* add 1 relocation - the true number of relocations is stored in the first relocation item */
fileoffset += sizeof( IMAGE_RELOCATION );
}
//printf( "segment %s has %u relocs\n", curr->sym.name, curr->e.seginfo->num_relocs );
}
/* set fields PointerToLinenumbers/NumberOfLinenumbers; update 'fileoffset' */
if ( curr->e.seginfo->LinnumQueue ) {
ish.PointerToLinenumbers = fileoffset;
ish.NumberOfLinenumbers = GetLinnumItems( curr->e.seginfo->LinnumQueue );
fileoffset += ish.NumberOfLinenumbers * sizeof( IMAGE_LINENUMBER );
}
DebugMsg(( "coff_write_section_table(%s): name=%.8s Fixups=%u, Linnums=%u\n", curr->sym.name, ish.Name, ish.NumberOfRelocations, ish.NumberOfLinenumbers ));
if ( fwrite( &ish, 1, sizeof( ish ), CurrFile[OBJ] ) != sizeof( ish ) )
WriteError();
}
#ifdef DEBUG_OUT
cm->start_symtab = fileoffset;
#endif
DebugMsg(("coff_write_section_table: exit\n"));
return( NOT_ERROR );
}
/*
* get value for field 'type' ( IMAGE_SYM_TYPE_x ) in symbol table.
* MS tools use only 0x0 or 0x20.
*/
static short CoffGetType( const struct asym *sym )
/************************************************/
{
if ( sym->isproc )
return( 0x20 );
#if 0
switch (sym->mem_type) {
case MT_BYTE:
case MT_SBYTE:
return( IMAGE_SYM_TYPE_BYTE );
case MT_WORD:
case MT_SWORD:
return( IMAGE_SYM_TYPE_WORD );
case MT_DWORD:
case MT_SDWORD:
return( IMAGE_SYM_TYPE_DWORD );
}
#endif
return( IMAGE_SYM_TYPE_NULL );
}
/*
* get value for field 'class' ( IMAGE_SYM_CLASS_x ) in symbol table.
*/
static short CoffGetClass( const struct asym *sym )
/*************************************************/
{
if ( sym->state == SYM_EXTERNAL )
if ( sym->iscomm == FALSE && sym->altname )
return( IMAGE_SYM_CLASS_WEAK_EXTERNAL );
else
return( IMAGE_SYM_CLASS_EXTERNAL );
else if ( sym->ispublic == TRUE )
return( IMAGE_SYM_CLASS_EXTERNAL );
#if HELPSYMS
else if ( sym->variable == TRUE ) /* assembly time variable in fixup */
return( IMAGE_SYM_CLASS_LABEL );
#endif
/* v2.09: don't declare private procs as label */
//else if ( sym->mem_type == MT_NEAR )/* added v2.0 */
else if ( sym->mem_type == MT_NEAR && sym->isproc == FALSE )
return( IMAGE_SYM_CLASS_LABEL );
return( IMAGE_SYM_CLASS_STATIC );
}
/* calc number of entries in symbol table for a file entry */
static unsigned GetFileAuxEntries( uint_16 file, char * *fname )
/**************************************************************/
{
const struct fname_item *curr;
unsigned len;
curr = GetFName( file );
if ( fname )
*fname = curr->fname;
len = strlen( curr->fname );
/**/myassert( len ); /* name length must be > 0 */
return ( len / sizeof( IMAGE_AUX_SYMBOL ) + ( len % sizeof( IMAGE_AUX_SYMBOL ) ? 1 : 0 ) );
}
#if COMDATSUPP
/* v2.10: COMDAT CRC calculation ( suggestion by drizz, slightly modified ) */
static uint_32 CRC32Table[256]; /* table is initialized if needed */
static void InitCRC32( void )
/***************************/
{
int i,j;
uint_32 crc;
for ( i = 0; i < 256; i++ ) {
for ( j = 0, crc = i; j < 8; j++ ) {
crc = ( crc >> 1 ) ^ (0xEDB88320 * ( crc & 1 ) );
}
CRC32Table[i] = crc;
}
}
static uint_32 CRC32Comdat( uint_8 *lpBuffer, uint_32 dwBufLen, uint_32 dwCRC )
/*****************************************************************************/
{
static bool init = FALSE;
uint_8 byt;
if ( !init ) {
init = TRUE;
InitCRC32();
}
if ( lpBuffer ) /* v2.11: lpBuffer may be NULL ( uninitialized data segs ) */
for ( ; dwBufLen; dwBufLen-- ) {
byt = *lpBuffer++;
byt = byt ^ (uint_8)dwCRC;
dwCRC = dwCRC >> 8;
dwCRC = dwCRC ^ CRC32Table[byt];
}
return( dwCRC );
}
#endif
/* write COFF symbol table
* contents of the table
* - @@feat.00 if .SAFESEH was set
* - file (+ 1-n aux)
* - 2 entries per section
* - externals, communals and publics
* - entries for relocations (internal)
* - aliases (weak externals)
*/
static uint_32 coff_write_symbols( struct module_info *modinfo, struct coffmod *cm )
/**********************************************************************************/
{
uint_32 cntSymbols = 0;
struct dsym *curr;
struct asym *sym;
struct qnode *q;
char *p;
unsigned len;
unsigned i;
IMAGE_SYMBOL is;
IMAGE_AUX_SYMBOL ias;
unsigned lastfile = 0;
char buffer[MAX_ID_LEN + MANGLE_BYTES + 1];
DebugMsg(("coff_write_symbols: enter\n"));
#if COMPID
/* write "@comp.id" entry */
if ( fwrite( &isCompId, 1, sizeof(IMAGE_SYMBOL), CurrFile[OBJ] ) != sizeof(IMAGE_SYMBOL) )
WriteError();
cntSymbols++;
#endif
/* "@feat.00" entry (for SafeSEH) */
if ( Options.safeseh ) {
if ( fwrite( &isFeat00, 1, sizeof(IMAGE_SYMBOL), CurrFile[OBJ] ) != sizeof(IMAGE_SYMBOL) )
WriteError();
cntSymbols++;
}
/* .file item (optionally disabled by -zlf) */
if ( Options.no_file_entry == FALSE ) {
strncpy( is.N.ShortName, ".file", IMAGE_SIZEOF_SHORT_NAME );
is.Value = ( Options.line_numbers ? cm->start_files : 0 ); /* index of next .file entry */
is.SectionNumber = (uint_16)IMAGE_SYM_DEBUG;
is.Type = IMAGE_SYM_TYPE_NULL;
is.StorageClass = IMAGE_SYM_CLASS_FILE;
p = cm->dot_file_value;
i = strlen( p );
is.NumberOfAuxSymbols = i / sizeof(IMAGE_AUX_SYMBOL) + (i % sizeof(IMAGE_AUX_SYMBOL) ? 1 : 0);
if ( fwrite( &is, 1, sizeof(is), CurrFile[OBJ] ) != sizeof(is) )
WriteError();
for ( i = is.NumberOfAuxSymbols;i;i--, p += sizeof(IMAGE_AUX_SYMBOL) ) {
strncpy( ias.File.Name, p, sizeof(IMAGE_AUX_SYMBOL) );
if ( fwrite( &ias, 1, sizeof(ias), CurrFile[OBJ] ) != sizeof(ias) )
WriteError();
}
cntSymbols += is.NumberOfAuxSymbols + 1;
}
/* next are section entries */
for( i = 1, curr = SymTables[TAB_SEG].head; curr; curr = curr->next, i++ ) {
/* v2.07: prefer ALIAS name if defined */
p = ( curr->e.seginfo->aliasname ? curr->e.seginfo->aliasname : ConvertSectionName( &curr->sym, NULL, buffer ) );
len = strlen( p );
if ( len <= IMAGE_SIZEOF_SHORT_NAME )
strncpy( is.N.ShortName, p, IMAGE_SIZEOF_SHORT_NAME );
else {
is.N.Name.Short = 0;
is.N.Name.Long = Coff_AllocString( cm, p, len );
}
is.Value = 0;
is.SectionNumber = i;
is.Type = IMAGE_SYM_TYPE_NULL;
is.StorageClass = IMAGE_SYM_CLASS_STATIC;
is.NumberOfAuxSymbols = 0;
if ( Options.no_section_aux_entry == FALSE )
is.NumberOfAuxSymbols = 1;
DebugMsg(("coff_write_symbols(%u, SECT): %s, type=%x, stgcls=%x\n", cntSymbols, curr->sym.name, is.Type, is.StorageClass ));
if ( fwrite( &is, 1, sizeof(is), CurrFile[OBJ] ) != sizeof(is) )
WriteError();
cntSymbols++;
/* write the auxiliary symbol record for sections.
* may be suppressed with option -zls.
*/
if ( Options.no_section_aux_entry == FALSE
#if COMDATSUPP
|| curr->e.seginfo->comdat_selection
#endif
) {
ias.Section.Length = curr->sym.max_offset;
/* v2.10: check for overflow */
//ias.Section.NumberOfRelocations = curr->e.seginfo->num_relocs;
ias.Section.NumberOfRelocations = ( curr->e.seginfo->num_relocs > 0xffff ? 0xffff : (uint_16)curr->e.seginfo->num_relocs );
if ( Options.line_numbers )
ias.Section.NumberOfLinenumbers = curr->e.seginfo->num_linnums;
else
ias.Section.NumberOfLinenumbers = 0;
/* CheckSum, Number and Selection are for COMDAT sections only */
#if COMDATSUPP
if ( curr->e.seginfo->comdat_selection ) {
ias.Section.CheckSum = CRC32Comdat( curr->e.seginfo->CodeBuffer, curr->sym.max_offset, 0 );
ias.Section.Number = curr->e.seginfo->comdat_number;
ias.Section.Selection = curr->e.seginfo->comdat_selection;
} else {
#endif
ias.Section.CheckSum = 0;
ias.Section.Number = 0;
ias.Section.Selection = 0;
#if COMDATSUPP
};
#endif
if ( fwrite( &ias, 1, sizeof(ias), CurrFile[OBJ] ) != sizeof(ias) )
WriteError();
DebugMsg(("coff_write_symbols(%u, SECT): %s, AUX, relocs=%u, linnums=%u\n", cntSymbols, curr->sym.name, ias.Section.NumberOfRelocations, ias.Section.NumberOfLinenumbers ));
cntSymbols++;
}
}
/* third are externals + communals ( + protos [since v2.01] ) */
for( curr = SymTables[TAB_EXT].head ; curr != NULL ;curr = curr->next ) {
/* skip "weak" (=unused) externdefs */
if ( curr->sym.iscomm == FALSE && curr->sym.weak == TRUE ) {
DebugMsg(("coff_write_symbols(EXT+COMM): %s skipped, used=%u, comm=%u, weak=%u\n", curr->sym.name, curr->sym.used, curr->sym.iscomm, curr->sym.weak ));
continue;
}
len = Mangle( &curr->sym, buffer );
is.Type = CoffGetType(&curr->sym);
is.StorageClass = CoffGetClass(&curr->sym);
DebugMsg(("coff_write_symbols(%u, EXT+COMM): %s, type=%x, stgcls=%x\n", cntSymbols, curr->sym.name, is.Type, is.StorageClass ));
/* for COMMUNALs, store their size in the Value field */
if (curr->sym.iscomm == TRUE)
is.Value = curr->sym.total_size;
else
is.Value = curr->sym.offset; /* is always 0 */
is.SectionNumber = IMAGE_SYM_UNDEFINED;
is.NumberOfAuxSymbols = (( curr->sym.iscomm == FALSE && curr->sym.altname ) ? 1 : 0 );
if ( len <= IMAGE_SIZEOF_SHORT_NAME )
strncpy( is.N.ShortName, buffer, IMAGE_SIZEOF_SHORT_NAME );
else {
is.N.Name.Short = 0;
is.N.Name.Long = Coff_AllocString( cm, buffer, len );
}
if ( fwrite( &is, 1, sizeof(is), CurrFile[OBJ] ) != sizeof(is) )
WriteError();
cntSymbols++;
/* for weak externals, write the auxiliary record */
if ( curr->sym.iscomm == FALSE && curr->sym.altname ) {
memset( &ias, 0, sizeof(ias) );
ias.Sym.TagIndex = curr->sym.altname->ext_idx;
/* v2.10: weak externals defined via "extern sym (altsym) ..."
* are to have characteristics IMAGE_WEAK_EXTERN_SEARCH_LIBRARY.
*/
//ias.Sym.Misc.TotalSize = IMAGE_WEAK_EXTERN_SEARCH_ALIAS;
ias.Sym.Misc.TotalSize = IMAGE_WEAK_EXTERN_SEARCH_LIBRARY;
if ( fwrite( &ias, 1, sizeof(ias), CurrFile[OBJ] ) != sizeof(ias) )
WriteError();
cntSymbols++;
}
}
/* publics and internal symbols. The internal symbols have
* been written to the "public" queue inside coff_write_data().
*/
for ( q = ModuleInfo.g.PubQueue.head; q; q = q->next ) {
sym = q->sym;
len = Mangle( sym, buffer );
#ifdef DEBUG_OUT
if ( sym->state == SYM_INTERNAL && sym->isproc == TRUE && Options.line_numbers )
DebugMsg(("coff_write_symbols(%u): %s, file=%u\n", cntSymbols, sym->name, sym->debuginfo->file ));
#endif
if ( Options.line_numbers &&
sym->isproc &&
sym->debuginfo->file != lastfile ) {
lastfile = sym->debuginfo->file;
strncpy( is.N.ShortName, ".file", IMAGE_SIZEOF_SHORT_NAME );
is.SectionNumber = (uint_16)IMAGE_SYM_DEBUG;
is.Type = IMAGE_SYM_TYPE_NULL;
is.StorageClass = IMAGE_SYM_CLASS_FILE;
is.NumberOfAuxSymbols = GetFileAuxEntries( sym->debuginfo->file, &p );
is.Value = sym->debuginfo->next_file;
if ( fwrite( &is, 1, sizeof(is), CurrFile[OBJ] ) != sizeof(is) )
WriteError();
for ( i = is.NumberOfAuxSymbols; i; i--, p += sizeof(IMAGE_AUX_SYMBOL) ) {
strncpy( ias.File.Name, p, sizeof(IMAGE_AUX_SYMBOL) );
if ( fwrite( &ias, 1, sizeof(ias), CurrFile[OBJ] ) != sizeof(ias) )
WriteError();
}
cntSymbols += is.NumberOfAuxSymbols + 1;
}
is.Type = CoffGetType( sym );
is.StorageClass = CoffGetClass( sym );
is.Value = sym->offset;
#if 1 /* v2.07: changed - to make MT_ABS obsolete */
if ( sym->state == SYM_INTERNAL ) {
if ( sym->segment )
is.SectionNumber = GetSegIdx( sym->segment );
else
is.SectionNumber = (uint_16)IMAGE_SYM_ABSOLUTE;
} else
is.SectionNumber = IMAGE_SYM_UNDEFINED;
#else
if ( sym->state == SYM_EXTERNAL )
is.SectionNumber = IMAGE_SYM_UNDEFINED;
else if ( sym->mem_type == MT_ABS )
is.SectionNumber = IMAGE_SYM_ABSOLUTE;
else if ( sym->segment )
is.SectionNumber = GetSegIdx( sym->segment );
else
is.SectionNumber = IMAGE_SYM_UNDEFINED;
#endif
is.NumberOfAuxSymbols = 0;
if ( Options.line_numbers && sym->isproc )
is.NumberOfAuxSymbols++;
if ( len <= IMAGE_SIZEOF_SHORT_NAME )
strncpy( is.N.ShortName, buffer, IMAGE_SIZEOF_SHORT_NAME );
else {
is.N.Name.Short = 0;
is.N.Name.Long = Coff_AllocString( cm, buffer, len );
}
DebugMsg(("coff_write_symbols(%u, PUB+INT): %s, ofs=%X, type=%X, stgcls=%X\n", cntSymbols, buffer, is.Value, is.Type, is.StorageClass ));
if ( fwrite( &is, 1, sizeof(is), CurrFile[OBJ] ) != sizeof(is) )
WriteError();
cntSymbols++;
if ( Options.line_numbers && sym->isproc ) {
/* write:
* 1. the aux for the proc
* 2+3. a .bf record with 1 aux
* 4. a .lf record with 0 aux
* 5+6. a .ef record with 1 aux
*/
ias.Sym.TagIndex = cntSymbols+1;
ias.Sym.Misc.TotalSize = sym->total_size;
ias.Sym.FcnAry.Function.PointerToLinenumber = sym->debuginfo->ln_fileofs;
ias.Sym.FcnAry.Function.PointerToNextFunction = sym->debuginfo->next_proc;
if ( fwrite( &ias, 1, sizeof(ias), CurrFile[OBJ] ) != sizeof(ias) )
WriteError();
strncpy( is.N.ShortName, ".bf", IMAGE_SIZEOF_SHORT_NAME );
is.Type = IMAGE_SYM_TYPE_NULL;
is.NumberOfAuxSymbols = 1;
is.StorageClass = IMAGE_SYM_CLASS_FUNCTION;
if ( fwrite( &is, 1, sizeof(is), CurrFile[OBJ] ) != sizeof(is) )
WriteError();
ias.Sym.TagIndex = 0;
ias.Sym.Misc.LnSz.Linenumber = sym->debuginfo->start_line;
if ( sym->debuginfo->next_proc )
ias.Sym.FcnAry.Function.PointerToNextFunction = sym->debuginfo->next_proc + 2;
else
ias.Sym.FcnAry.Function.PointerToNextFunction = 0;
if ( fwrite( &ias, 1, sizeof(ias), CurrFile[OBJ] ) != sizeof(ias) )
WriteError();
strncpy( is.N.ShortName, ".lf", IMAGE_SIZEOF_SHORT_NAME );
is.Type = IMAGE_SYM_TYPE_NULL;
is.NumberOfAuxSymbols = 0;
is.StorageClass = IMAGE_SYM_CLASS_FUNCTION;
is.Value = sym->debuginfo->line_numbers;
if ( fwrite( &is, 1, sizeof(is), CurrFile[OBJ] ) != sizeof(is) )
WriteError();
strncpy( is.N.ShortName, ".ef", IMAGE_SIZEOF_SHORT_NAME );
is.Type = IMAGE_SYM_TYPE_NULL;
is.NumberOfAuxSymbols = 1;
is.StorageClass = IMAGE_SYM_CLASS_FUNCTION;
is.Value = sym->offset + sym->total_size;
if ( fwrite( &is, 1, sizeof(is), CurrFile[OBJ] ) != sizeof(is) )
WriteError();
ias.Sym.TagIndex = 0;
ias.Sym.Misc.LnSz.Linenumber = sym->debuginfo->end_line;
if ( fwrite( &ias, 1, sizeof(ias), CurrFile[OBJ] ) != sizeof(ias) )
WriteError();
cntSymbols += 6;
}
}
/* aliases. A weak external entry with 1 aux entry is created.
*/
for( curr = SymTables[TAB_ALIAS].head ; curr != NULL ;curr = curr->next ) {
struct asym * sym;
len = Mangle( &curr->sym, buffer );
if ( len <= IMAGE_SIZEOF_SHORT_NAME )
strncpy( is.N.ShortName, buffer, IMAGE_SIZEOF_SHORT_NAME );
else {
is.N.Name.Short = 0;
is.N.Name.Long = Coff_AllocString( cm, buffer, len );
}
is.Value = 0;
is.SectionNumber = IMAGE_SYM_UNDEFINED;
is.Type = IMAGE_SYM_TYPE_NULL;
is.StorageClass = IMAGE_SYM_CLASS_WEAK_EXTERNAL;
is.NumberOfAuxSymbols = 1;
DebugMsg(("coff_write_symbols(%u, ALIAS): symbol %s, ofs=%X\n", cntSymbols, buffer, is.Value ));
if ( fwrite( &is, 1, sizeof(is), CurrFile[OBJ] ) != sizeof(is) )
WriteError();
cntSymbols++;
memset( &ias, 0, sizeof(ias) );
/* v2.04b: adjusted to new field <substitute> */
//sym = SymSearch( curr->sym.string_ptr );
sym = curr->sym.substitute;
if (sym)
ias.Sym.TagIndex = sym->ext_idx;
ias.Sym.Misc.TotalSize = IMAGE_WEAK_EXTERN_SEARCH_ALIAS;
if ( fwrite( &ias, 1, sizeof(ias), CurrFile[OBJ] ) != sizeof(ias) )
WriteError();
cntSymbols++;
}
DebugMsg(("coff_write_symbols: exit cntSymbols=%u\n", cntSymbols ));
return( cntSymbols );
}
static int GetStartLabel( char *buffer, bool msg )
/************************************************/
{
int size = 0;
char temp[ MAX_ID_LEN + MANGLE_BYTES + 1 ];
if ( ModuleInfo.g.start_label ) {
Mangle( ModuleInfo.g.start_label, temp );
if ( Options.entry_decorated )
strcpy( buffer, temp );
else {
if ( ModuleInfo.g.start_label->langtype != LANG_C &&
ModuleInfo.g.start_label->langtype != LANG_STDCALL &&
ModuleInfo.g.start_label->langtype != LANG_SYSCALL ) {
if ( *ModuleInfo.g.start_label->name != '_' ) {
if ( msg && ( ModuleInfo.fctype != FCT_WIN64 ) )
EmitWarn( 2, LEADING_UNDERSCORE_REQUIRED_FOR_START_LABEL, ModuleInfo.g.start_label->name );
strcpy( buffer, temp );
} else {
strcpy( buffer, temp+1 );
}
} else
strcpy( buffer, temp+1 );
}
size = strlen( buffer ) + 8; // 8 == size of " -entry:"
}
return( size );
}
/* callback to flush contents of codeview symbolic debug info sections */
static uint_8 *coff_flushfunc( struct dsym *seg, uint_8 *curr, unsigned size, void *pv )
/**************************************************************************************/
{
unsigned currsize = curr - seg->e.seginfo->CodeBuffer;
struct coffmod *cm;
int i;
uint_8 *p;
if ( ( currsize + size ) > SIZE_CV_SEGBUF ) {
if ( currsize ) {
p = LclAlloc( currsize + sizeof( struct qditem ) );
((struct qditem *)p)->next = NULL;
((struct qditem *)p)->size = currsize;
memcpy( p + sizeof( struct qditem ), seg->e.seginfo->CodeBuffer, currsize );
cm = pv;
i = ( seg == cm->SymDeb[DBGS_TYPES].seg ? DBGS_TYPES : DBGS_SYMBOLS );
if ( cm->SymDeb[i].q.head == NULL )
cm->SymDeb[i].q.head = cm->SymDeb[i].q.tail = p;
else {
((struct qditem *)(cm->SymDeb[i].q.tail))->next = p;
cm->SymDeb[i].q.tail = p;
}
seg->e.seginfo->current_loc = seg->e.seginfo->start_loc + currsize;
seg->e.seginfo->start_loc = seg->e.seginfo->current_loc;
}
return( seg->e.seginfo->CodeBuffer );
}
return( curr );
}
/* calc the current number of entries in the symbol table
* so we know the index if a new entry has to be added
* called by coff_write_data()
*/
static uint_32 SetSymbolIndices( struct module_info *ModuleInfo, struct coffmod *cm )
/***********************************************************************************/
{
struct qnode *q;
struct dsym *curr;
struct asym *sym;
uint_32 index;
uint_32 i;
struct asym *lastfproc;
unsigned lastfile = 0;
index = 0;
cm->lastproc = NULL;
cm->start_files = 0; /* v2.11: added */
#if COMPID
index++;
#endif
/* add absolute symbol @@feat.00 if -SAFESEH is set */
if ( Options.safeseh )
index++;
/* count AUX entries for .file. Depends on sizeof filename */
if ( Options.no_file_entry == FALSE ) {
i = strlen( cm->dot_file_value );
index += i / sizeof( IMAGE_AUX_SYMBOL ) + 1;
if ( i % sizeof( IMAGE_AUX_SYMBOL ) )
index++;
}
/* add entries for sections */
cm->sectionstart = index;
index += ModuleInfo->g.num_segs;
if ( Options.no_section_aux_entry == FALSE )
index += ModuleInfo->g.num_segs;
/* count externals and protos */
for( curr = SymTables[TAB_EXT].head ; curr != NULL ; curr = curr->next ) {
if ( curr->sym.iscomm == FALSE && curr->sym.weak == TRUE )
continue;
curr->sym.ext_idx = index++;
/* weak externals need an additional aux entry */
if ( curr->sym.iscomm == FALSE && curr->sym.altname )
index++;
}
#if STATIC_PROCS
/* v2.04: count private procedures (will become static symbols) */
if ( Options.no_static_procs == FALSE )
for( curr = SymTables[TAB_PROC].head ; curr != NULL ; curr = curr->nextproc )
if ( curr->sym.state == SYM_INTERNAL && curr->sym.ispublic == FALSE && curr->sym.included == FALSE ) {
curr->sym.included = TRUE;
AddPublicData( &curr->sym );
}
#endif
/* count items in public queue */
for ( q = ModuleInfo->g.PubQueue.head; q; q = q->next ) {
sym = q->sym;
/* if line numbers are on, co, add 6 entries for procs */
if ( Options.line_numbers && sym->isproc ) {
if ( sym->debuginfo->file != lastfile ) {
if ( cm->start_files == 0 )
cm->start_files = index;
else
lastfproc->debuginfo->next_file = index;
lastfproc = sym;
index += 1 + GetFileAuxEntries( sym->debuginfo->file, NULL );
lastfile = sym->debuginfo->file;
}
sym->ext_idx = index++;
index += 6;
} else
sym->ext_idx = index++;
}
return( index );
}
/* write fixups for a section. */
static void coff_write_fixups( struct dsym *section, uint_32 *poffset, uint_32 *pindex )
/**************************************************************************************/
{
uint_32 offset = *poffset;
uint_32 index = *pindex;
struct fixup *fix;
IMAGE_RELOCATION ir;
/* v2.10: handle the reloc-overflow-case */
if ( section->e.seginfo->num_relocs > 0xffff ) {
DebugMsg(("coff_write_fixups(%s): enter, num_relocs=%" I32_SPEC "u\n", section->sym.name, section->e.seginfo->num_relocs ));
ir.VirtualAddress = section->e.seginfo->num_relocs + 1;
ir.SymbolTableIndex = 0;
ir.Type = IMAGE_REL_I386_ABSOLUTE; /* doesn't matter if 32- or 64-bit */
if ( fwrite( &ir, 1, sizeof(ir), CurrFile[OBJ] ) != sizeof(ir) )
WriteError();
offset += sizeof( ir );
}
/* reset counter */
section->e.seginfo->num_relocs = 0;
for ( fix = section->e.seginfo->FixupList.head; fix ; fix = fix->nextrlc ) {
#if AMD64_SUPPORT
if ( section->e.seginfo->Ofssize == USE64 ) {
switch ( fix->type ) {
case FIX_VOID:
continue;
case FIX_RELOFF32: /* 32bit offset */
/* translated to IMAGE_REL_AMD64_REL32_[1|2|3|4|5] */
ir.Type = IMAGE_REL_AMD64_REL32 + (fix->addbytes - 4);
break;
case FIX_OFF32: /* 32bit offset */
ir.Type = IMAGE_REL_AMD64_ADDR32;
break;
#if IMAGERELSUPP
case FIX_OFF32_IMGREL:
ir.Type = IMAGE_REL_AMD64_ADDR32NB;
break;
#endif
#if SECTIONRELSUPP
case FIX_OFF32_SECREL:
ir.Type = IMAGE_REL_AMD64_SECREL;
break;
#endif
case FIX_OFF64: /* 64bit offset */
ir.Type = IMAGE_REL_AMD64_ADDR64;
break;
case FIX_SEG: /* segment fixup */
ir.Type = IMAGE_REL_AMD64_SECTION; /* ??? */
break;
#if 0 /* not supported by COFF64! shouldn't reach this point */
case FIX_RELOFF8:
case FIX_RELOFF16:
case FIX_OFF8:
case FIX_OFF16:
case FIX_HIBYTE:
case FIX_PTR16: /* 16bit far pointer */
case FIX_PTR32: /* 32bit far pointer */
#endif
default:
DebugMsg(("coff_write_fixups(%s, %Xh): reloc loc=%X type=%u idx=%u sym=%s\n",
section->sym.name, offset, fix->locofs, fix->type, fix->sym->ext_idx, fix->sym->name));
EmitErr( UNKNOWN_FIXUP_TYPE, fix->type, section->sym.name, fix->locofs );
continue; /* v2.03: skip this fixup */
//break;
}
} else
#endif
switch ( fix->type ) {
case FIX_VOID:
continue;
case FIX_RELOFF16: /* 16bit offset */
ir.Type = IMAGE_REL_I386_REL16;
break;
case FIX_OFF16: /* 16bit offset */
ir.Type = IMAGE_REL_I386_DIR16;
break;
case FIX_RELOFF32: /* 32bit offset */
ir.Type = IMAGE_REL_I386_REL32;
break;
case FIX_OFF32: /* 32bit offset */
ir.Type = IMAGE_REL_I386_DIR32;
break;
#if IMAGERELSUPP
case FIX_OFF32_IMGREL:
ir.Type = IMAGE_REL_I386_DIR32NB;
break;
#endif
#if SECTIONRELSUPP
case FIX_OFF32_SECREL:
ir.Type = IMAGE_REL_I386_SECREL;
break;
#endif
case FIX_SEG: /* segment fixup */
ir.Type = IMAGE_REL_I386_SECTION; /* ??? */
break;
#if 0
case FIX_OFF8:
case FIX_RELOFF8:
case FIX_HIBYTE:
case FIX_PTR16: /* 16bit far pointer */
case FIX_PTR32: /* 32bit far pointer */
#endif
default:
DebugMsg(("coff_write_fixups(%s, %Xh): reloc loc=%X type=%u idx=%u sym=%s\n",
section->sym.name, offset, fix->locofs, fix->type, fix->sym->ext_idx, fix->sym->name));
EmitErr( UNKNOWN_FIXUP_TYPE, fix->type, section->sym.name, fix->locofs );
continue; /* v2.03: skip this fixup */
//break;
}