static size_t GetNameBuffAttr( drmem_hdl entry, char *buff, size_t length, dw_atnum attrib )
/******************************************************************************************/
{
drmem_hdl abbrev;
dw_formnum form;
abbrev = DWRSkipTag( &entry ) + 1;
if( DWRScanForAttrib( &abbrev, &entry, attrib ) ) {
form = DWRVMReadULEB128( &abbrev );
switch( form ) {
case DW_FORM_string:
length = DWRVMGetStrBuff( entry, buff, length );
break;
case DW_FORM_strp:
{
unsigned_32 offset;
drmem_hdl dbgsec_str;
offset = ReadConst( DW_FORM_data4, entry );
dbgsec_str = DWRCurrNode->sections[DR_DEBUG_STR].base + offset;
length = DWRVMGetStrBuff( dbgsec_str, buff, length );
}
break;
default:
DWREXCEPT( DREXCEP_BAD_DBG_INFO );
length = 0;
}
} else {
length = 0;
}
return( length );
}
static dr_handle ScopePop( dr_scope_stack *stack )
/************************************************/
{
if( stack->free <= 0 ) {
DWREXCEPT( DREXCEP_DWARF_LIB_FAIL );
}
stack->free -= 1;
return( stack->stack[stack->free] );
}
uint_32 DWRStackPop( // POP ITEM OFF THE STACK
dr_stack *stk ) // -- stack to pop off of
/*************************/
{
if( stk->free == 0 ) {
DWREXCEPT( DREXCEP_DWARF_LIB_FAIL );
}
stk->free -= 1;
return stk->stack[stk->free];
}
static void GetMoreBranches( void )
/*********************************/
// make a larger array to hold branch pointers in.
{
page_entry **branches;
unsigned alloc_size;
alloc_size = NumBranches * sizeof( page_entry * );
NumBranches = NumBranches * 2; // double the # of pointers.
if( NumBranches > SEG_LIMIT ) {
DWREXCEPT( DREXCEP_OUT_OF_VM );
}
branches = DWRALLOC( alloc_size * 2 );
memcpy( branches, PageTab, alloc_size );
memset( (char *)branches + alloc_size, 0, alloc_size ); // null pointers
DWRFREE( PageTab );
PageTab = branches;
}
extern dr_handle DWRVMAlloc( unsigned long len, int sect )
/********************************************************/
{
alloc_struct *nChunk;
if( len == 0 ) {
return( 0 );
}
nChunk = (alloc_struct *)DWRALLOC( len - 1 + sizeof( alloc_struct ) );
if( nChunk == NULL ) {
DWREXCEPT( DREXCEP_OUT_OF_MMEM );
return( 0 );
}
nChunk->next = AllocHead;
AllocHead = nChunk;
DWRSEEK( DWRCurrNode->file, sect, 0 );
DWRREAD( DWRCurrNode->file, sect, nChunk->data, len );
return( (dr_handle)nChunk->data );
}
void DRWalkARange( DRARNGWLK callback, void *data )
/*************************************************/
{
dr_arange_data arange;
arange_header header;
drmem_hdl base;
drmem_hdl pos;
drmem_hdl finish;
uint_32 tuple_size;
pointer_int aligned_addr;
pointer_int addr;
bool wat_producer;
bool zero_padding = true;
base = DWRCurrNode->sections[DR_DEBUG_INFO].base;
pos = DWRCurrNode->sections[DR_DEBUG_ARANGES].base;
finish = pos + DWRCurrNode->sections[DR_DEBUG_ARANGES].size;
while( pos < finish ) {
DWRVMRead( pos, &header, sizeof( header ) );
pos += sizeof( header );
if( DWRCurrNode->byte_swap ) {
SWAP_32( header.len );
SWAP_16( header.version );
SWAP_32( header.dbg_pos );
}
if( header.version != DEBUG_ARANGES_VERSION )
DWREXCEPT( DREXCEP_BAD_DBG_VERSION );
arange.dbg = base + header.dbg_pos;
arange.addr_size = header.addr_size;
arange.seg_size = header.seg_size;
arange.is_start = true; /* start of bunch */
tuple_size = ( header.addr_size + header.seg_size + header.addr_size );
/* Open Watcom prior to 1.4 didn't align tuples properly; unfortunately
* it may be hard to tell if debug info was generated by Watcom!
*/
/* NB: The writers of the DWARF 2/3 standard clearly didn't think very hard
* about segmented architectures. If tuple size is 10 (32-bit offset, 16-bit
* segment, 32-bit size) we assume the data was generated by our tools and
* no alignment padding was used.
*/
wat_producer = ( DWRCurrNode->wat_producer_ver > VER_NONE ) || ( tuple_size == 10 );
addr = (pointer_int)pos;
aligned_addr = (addr + tuple_size - 1) & ~(tuple_size - 1);
if( aligned_addr != addr ) {
/* try reading the padding; if it's nonzero, assume it's not there */
if( DWRReadInt( pos, header.addr_size ) != 0 )
zero_padding = false;
if( header.seg_size && DWRReadInt( pos + header.addr_size, header.seg_size ) != 0 )
zero_padding = false;
if( !wat_producer && zero_padding ) {
pos = (drmem_hdl)aligned_addr;
}
}
for( ;; ) {
arange.addr = DWRReadInt( pos, header.addr_size );
pos += header.addr_size;
if( header.seg_size != 0 ) {
arange.seg = (uint_16)DWRReadInt( pos, header.seg_size );
pos += header.seg_size;
} else { /* flat */
arange.seg = 0;
}
arange.len = DWRReadInt( pos, header.addr_size );
pos += header.addr_size;
if( arange.addr == 0 && arange.seg == 0 && arange.len == 0 )
break;
if( !callback( data, &arange ) )
break;
arange.is_start = false;
}
}
}
