+ return 0;
+ }
+
+ /* #pragma stack [stack-position] [stack-len] */
+ if(startsWith(ptr, "stack")) {
+ char *stackPosS = strtok((char *)NULL, WHITE);
+ char *stackLenS = strtok((char *)NULL, WHITE);
+ value *stackPosVal;
+ value *stackLenVal;
+ regs *reg;
+ symbol *sym;
+
+ if (!stackPosS) {
+ fprintf (stderr, "%s:%d: #pragma stack [stack-pos] [stack-length] -- stack-position missing\n", filename, lineno-1);
+
+ return 0; /* considered an error */
+ }
+
+ stackPosVal = constVal( stackPosS );
+ stackPos = (unsigned int)floatFromVal( stackPosVal );
+
+ if(stackLenS) {
+ stackLenVal = constVal( stackLenS );
+ stackLen = (unsigned int)floatFromVal( stackLenVal );
+ }
+
+ if(stackLen < 1) {
+ stackLen = 64;
+ fprintf(stderr, "%s:%d: warning: setting stack to default size %d (0x%04x)\n",
+ filename, lineno-1, stackLen, stackLen);
+ }
+
+ /* check sanity of stack */
+ if ((stackPos >> 8) != ((stackPos+stackLen-1) >> 8)) {
+ fprintf (stderr, "%s:%u: warning: stack [0x%03X,0x%03X] crosses memory bank boundaries (not fully tested)\n",
+ filename,lineno-1, stackPos, stackPos+stackLen-1);
+ }
+
+ if (pic16) {
+ if (stackPos < pic16->acsSplitOfs) {
+ fprintf (stderr, "%s:%u: warning: stack [0x%03X, 0x%03X] intersects with the access bank [0x000,0x%03x] -- this is highly discouraged!\n",
+ filename, lineno-1, stackPos, stackPos+stackLen-1, pic16->acsSplitOfs);
+ }
+
+ if (stackPos+stackLen > 0xF00 + pic16->acsSplitOfs) {
+ fprintf (stderr, "%s:%u: warning: stack [0x%03X,0x%03X] intersects with special function registers [0x%03X,0xFFF]-- this is highly discouraged!\n",
+ filename, lineno-1, stackPos, stackPos+stackLen-1, 0xF00 + pic16->acsSplitOfs);
+ }
+
+ if (stackPos+stackLen > pic16->RAMsize) {
+ fprintf (stderr, "%s:%u: error: stack [0x%03X,0x%03X] is placed outside available memory [0x000,0x%03X]!\n",
+ filename, lineno-1, stackPos, stackPos+stackLen-1, pic16->RAMsize-1);
+ exit(-1);
+ return 1; /* considered an error, but this reports "invalid pragma stack"... */
+ }
+ }
+
+ reg=newReg(REG_SFR, PO_SFR_REGISTER, stackPos, "_stack", stackLen-1, 0, NULL);
+ addSet(&pic16_fix_udata, reg);
+
+ reg = newReg(REG_SFR, PO_SFR_REGISTER, stackPos + stackLen-1, "_stack_end", 1, 0, NULL);
+ addSet(&pic16_fix_udata, reg);
+
+ sym = newSymbol("stack", 0);
+ sprintf(sym->rname, "_%s", sym->name);
+ addSet(&publics, sym);