#include "error.h"
#include "expr.h"
#include "fileio.h"
+#include "fragment.h"
#include "global.h"
#include "segments.h"
-/* Fragment structure */
-typedef struct Fragment_ Fragment;
-struct Fragment_ {
- Fragment* Next; /* Next fragment in list */
- ObjData* Obj; /* Source of fragment */
- unsigned long Size; /* Size of data/expression */
- ExprNode* Expr; /* Expression if FRAG_EXPR */
- FilePos Pos; /* File position in source */
- unsigned char Type; /* Type of fragment */
- unsigned char LitBuf [1]; /* Dynamically alloc'ed literal buffer */
-};
-
-
-
/* Hash table */
#define HASHTAB_SIZE 253
static Segment* HashTab [HASHTAB_SIZE];
-static Fragment* NewFragment (unsigned char Type, unsigned long Size, Section* S)
-/* Create a new fragment and insert it into the segment S */
+static Segment* SegFindInternal (const char* Name, unsigned HashVal)
+/* Try to find the segment with the given name, return a pointer to the
+ * segment structure, or 0 if not found.
+ */
{
- /* Allocate memory */
- Fragment* F = xmalloc (sizeof (Fragment) - 1 + Size); /* Portable? */
-
- /* Initialize the data */
- F->Next = 0;
- F->Obj = 0;
- F->Size = Size;
- F->Expr = 0;
- F->Type = Type;
-
- /* Insert the code fragment into the segment */
- if (S->FragRoot == 0) {
- /* First fragment */
- S->FragRoot = F;
- } else {
- S->FragLast->Next = F;
+ Segment* S = HashTab [HashVal];
+ while (S) {
+ if (strcmp (Name, S->Name) == 0) {
+ /* Found */
+ break;
+ }
+ S = S->Next;
}
- S->FragLast = F;
- S->Size += Size;
-
- /* Return the new fragment */
- return F;
+ /* Not found */
+ return S;
}
-static Segment* NewSegment (const char* Name, unsigned char Type)
+static Segment* NewSegment (const char* Name, unsigned HashVal, unsigned char Type)
/* Create a new segment and initialize it */
{
/* Get the length of the symbol name */
SegRoot = S;
++SegCount;
+ /* Insert the segment into the segment hash list */
+ S->Next = HashTab [HashVal];
+ HashTab [HashVal] = S;
+
/* Return the new entry */
return S;
}
-static Section* NewSection (Segment* Seg, unsigned char Align, unsigned char Type)
+Segment* GetSegment (const char* Name, unsigned char Type, 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.
+ */
+{
+ /* Create a hash over the name and try to locate the segment in the table */
+ unsigned HashVal = HashStr (Name) % HASHTAB_SIZE;
+ Segment* S = SegFindInternal (Name, HashVal);
+
+ /* 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, HashVal, Type);
+ } else {
+ /* Check if the existing segment has the requested type */
+ if (S->Type != Type) {
+ /* Allow an empty object name */
+ if (ObjName == 0) {
+ ObjName = "[linker generated]";
+ }
+ Error ("Module `%s': Type mismatch for segment `%s'", ObjName, Name);
+ }
+ }
+
+ /* Return the segment */
+ return S;
+}
+
+
+
+Section* NewSection (Segment* Seg, unsigned char Align, unsigned char Type)
/* Create a new section for the given segment */
{
unsigned long V;
S->Seg = Seg;
S->FragRoot = 0;
S->FragLast = 0;
- S->Size = 0;
+ S->Size = 0;
S->Align = Align;
S->Type = Type;
-static Segment* SegFindInternal (const char* Name, unsigned HashVal)
-/* Try to find the segment with the given name, return a pointer to the
- * segment structure, or 0 if not found.
- */
-{
- Segment* S = HashTab [HashVal];
- while (S) {
- if (strcmp (Name, S->Name) == 0) {
- /* Found */
- break;
- }
- S = S->Next;
- }
- /* Not found */
- return S;
-}
-
-
-
Section* ReadSection (FILE* F, ObjData* O)
/* Read a section from a file */
{
- unsigned HashVal;
- char Name [256];
+ char* Name;
unsigned long Size;
unsigned char Align;
unsigned char Type;
Section* Sec;
/* Read the name */
- ReadStr (F, Name);
+ Name = ReadStr (F);
/* Read the size */
Size = Read32 (F);
/* Print some data */
if (Verbose > 1) {
printf ("Module `%s': Found segment `%s', size = %lu, align = %u, type = %u\n",
- O->Name, Name, Size, Align, Type);
+ GetObjFileName (O), Name, Size, Align, Type);
}
- /* Create a hash over the name and try to locate the segment in the table */
- HashVal = HashStr (Name) % HASHTAB_SIZE;
- S = SegFindInternal (Name, HashVal);
+ /* Get the segment for this section */
+ S = GetSegment (Name, Type, GetObjFileName (O));
- /* If we don't have that segment already, allocate it using the type of
- * the first section.
- */
- if (S == 0) {
- /* Create a new segment and insert it */
- S = NewSegment (Name, Type);
- S->Next = HashTab [HashVal];
- HashTab [HashVal] = S;
- }
+ /* We have the segment and don't need the name any longer */
+ xfree (Name);
/* Allocate the section we will return later */
Sec = NewSection (S, Align, Type);
- /* Check if the section has the same type as the segment */
- if (Sec->Type != S->Type) {
- /* OOPS */
- Error ("Module `%s': Type mismatch for segment `%s'", O->Name, S->Name);
- }
-
/* Set up the minimum segment alignment */
if (Sec->Align > S->Align) {
/* Section needs larger alignment, use this one */
/* Handle the different fragment types */
switch (Type) {
- case FRAG_LITERAL8:
- Frag = NewFragment (FRAG_LITERAL, Read8 (F), Sec);
- break;
-
- case FRAG_LITERAL16:
- Frag = NewFragment (FRAG_LITERAL, Read16 (F), Sec);
- break;
-
- case FRAG_LITERAL24:
- Frag = NewFragment (FRAG_LITERAL, Read24 (F), Sec);
- break;
-
- case FRAG_LITERAL32:
- Frag = NewFragment (FRAG_LITERAL, Read32 (F), Sec);
+ case FRAG_LITERAL:
+ Frag = NewFragment (Type, ReadVar (F), Sec);
break;
case FRAG_EXPR8:
case FRAG_FILL:
/* Will allocate memory, but we don't care... */
- Frag = NewFragment (FRAG_FILL, Read16 (F), Sec);
+ Frag = NewFragment (Type, ReadVar (F), Sec);
break;
default:
Error ("Unknown fragment type in module `%s', segment `%s': %02X",
- O->Name, S->Name, Type);
+ GetObjFileName (O), S->Name, Type);
/* NOTREACHED */
return 0;
}
Size -= Frag->Size;
}
- /* Increment the segment size by the section size */
- S->Size += Sec->Size;
-
/* Return the section */
return Sec;
}
while (Count--) {
if (I > 75) {
printf ("\n ");
- I = 3;
+ I = 3;
}
printf (" %02X", *Data++);
I += 3;
case FRAG_FILL:
printf (" Empty space (%lu bytes)\n", F->Size);
- break;
+ break;
default:
Internal ("Invalid fragment type: %02X", F->Type);
case SEG_EXPR_RANGE_ERROR:
Error ("Range error in module `%s', line %lu",
- Frag->Obj->Files [Frag->Pos.Name], Frag->Pos.Line);
+ GetSourceFileName (Frag->Obj, Frag->Pos.Name),
+ Frag->Pos.Line);
break;
case SEG_EXPR_TOO_COMPLEX:
Error ("Expression too complex in module `%s', line %lu",
- Frag->Obj->Files [Frag->Pos.Name], Frag->Pos.Line);
+ GetSourceFileName (Frag->Obj, Frag->Pos.Name),
+ Frag->Pos.Line);
break;
default:
projects / cc65 / blobdiff