Segment* GetSegment (unsigned Name, unsigned char AddrSize, const char* ObjName)
/* Search for a segment and return an existing one. If the segment does not
** exist, create a new one and return that. ObjName is only used for the error
** message and may be NULL if the segment is linker generated.
*/
{
/* Try to locate the segment in the table */
Segment* S = SegFind (Name);
/* If we don't have that segment already, allocate it using the type of
** the first section.
*/
if (S == 0) {
/* Create a new segment */
S = NewSegment (Name, AddrSize);
} else {
/* Check if the existing segment has the requested address size */
if (S->AddrSize != AddrSize) {
/* Allow an empty object name */
if (ObjName == 0) {
ObjName = "[linker generated]";
}
Error ("Module '%s': Type mismatch for segment '%s'", ObjName,
GetString (Name));
}
}
/* Return the segment */
return S;
}
static SegDesc* NewSegDesc (unsigned Name)
/* Create a segment descriptor */
{
Segment* Seg;
/* Check for duplicate names */
SegDesc* S = CfgFindSegDesc (Name);
if (S) {
CfgError ("Segment `%s' defined twice", GetString (Name));
}
/* Search for the actual segment in the input files. The function may
* return NULL (no such segment), this is checked later.
*/
Seg = SegFind (Name);
/* Allocate memory */
S = xmalloc (sizeof (SegDesc));
/* Initialize the fields */
S->Name = Name;
S->Next = 0;
S->Seg = Seg;
S->Attr = 0;
S->Flags = 0;
S->Align = 0;
/* ...and return it */
return S;
}
