Save location information of symbol definitions

Now, object files save the file name and line number where each global
symbol is defined.

Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>

include/asm/fstack.h

@@ -41,6 +41,8 @@ extern void fstk_RunRept(ULONG count);
 FILE *
 fstk_FindFile(char *);
 
+int fstk_GetLine(void);
+
 extern int yywrap(void);
 
 #endif

include/asm/symbol.h

@@ -16,6 +16,8 @@ struct sSymbol {
 	ULONG ulMacroSize;
 	char *pMacro;
 	SLONG(*Callback) (struct sSymbol *);
+	char tzFileName[_MAX_PATH + 1]; /* File where the symbol was defined. */
+	ULONG nFileLine; /* Line where the symbol was defined. */
 };
 #define SYMF_RELOC		0x001	/* symbol will be reloc'ed during
 					 * linking, it's absolute value is

include/link/mylink.h

@@ -89,6 +89,8 @@ struct sSymbol {
 	SLONG nSectionID;	/* internal to object.c */
 	struct sSection *pSection;
 	SLONG nOffset;
+	char *pzFileName; /* Source file where the symbol was defined. */
+	ULONG nFileLine; /* Line where the symbol was defined. */
 };
 
 enum ePatchType {

src/asm/fstack.c

@@ -42,7 +42,7 @@ extern FILE *dependfile;
 /*
  * defines for nCurrentStatus
  */
-#define STAT_isInclude 		0
+#define STAT_isInclude		0 /* 'Normal' state as well */
 #define STAT_isMacro		1
 #define STAT_isMacroArg		2
 #define STAT_isREPTBlock	3
@@ -151,6 +151,37 @@ popcontext(void)
 		return (1);
 }
 
+int
+fstk_GetLine(void)
+{
+	struct sContext *pLastFile, **ppLastFile;
+
+	switch (nCurrentStatus) {
+	case STAT_isInclude:
+		/* This is the normal mode, also used when including a file. */
+		return nLineNo;
+	case STAT_isMacro:
+		break; /* Peek top file of the stack */
+	case STAT_isMacroArg:
+		return nLineNo; /* ??? */
+	case STAT_isREPTBlock:
+		break; /* Peek top file of the stack */
+	}
+
+	if ((pLastFile = pFileStack) != NULL) {
+		ppLastFile = &pFileStack;
+		while (pLastFile->pNext) {
+			ppLastFile = &(pLastFile->pNext);
+			pLastFile = *ppLastFile;
+		}
+		return pLastFile->nLine;
+	}
+
+	/* This is only reached if the lexer is in REPT or MACRO mode but there
+	 * are no saved contexts with the origin of said REPT or MACRO. */
+	fatalerror("fstk_GetLine: Internal error.");
+}
+
 int
 yywrap(void)
 {

src/asm/output.c

@@ -282,6 +282,9 @@ writesymbol(struct sSymbol * pSym, FILE * f)
 	fputc(type, f);
 
 	if (type != SYM_IMPORT) {
+		fputstring(pSym->tzFileName, f);
+		fputlong(pSym->nFileLine, f);
+
 		fputlong(sectid, f);
 		fputlong(offset, f);
 	}

src/asm/symbol.c

@@ -8,6 +8,7 @@
 #include <time.h>
 
 #include "asm/asm.h"
+#include "asm/fstack.h"
 #include "asm/symbol.h"
 #include "asm/main.h"
 #include "asm/mymath.h"
@@ -109,6 +110,8 @@ createsymbol(char *s)
 		(*ppsym)->pMacro = NULL;
 		(*ppsym)->pSection = NULL;
 		(*ppsym)->Callback = NULL;
+		strcpy((*ppsym)->tzFileName, tzCurrentFileName);
+		(*ppsym)->nFileLine = fstk_GetLine();
 		return (*ppsym);
 	} else {
 		fatalerror("No memory for symbol");

src/link/object.c

@@ -126,7 +126,12 @@ obj_ReadSymbol(FILE * f)
 	}
 
 	readasciiz(&pSym->pzName, f);
-	if ((pSym->Type = (enum eSymbolType) fgetc(f)) != SYM_IMPORT) {
+	pSym->Type = (enum eSymbolType)fgetc(f);
+
+	if (pSym->Type != SYM_IMPORT) {
+		readasciiz(&pSym->pzFileName, f);
+		pSym->nFileLine = readlong(f);
+
 		pSym->nSectionID = readlong(f);
 		pSym->nOffset = readlong(f);
 	}