/* adapted from the osu8asm project, 1995 */
/* http://www.pjrc.com/tech/osu8/index.html */
+/*
+ made "relocatable" by johan.knol@iduna.nl for sdcc
+
+ This isn't a standalone assembler anymore. It's only purpose is to
+ create relocatable modules (that has to be processed with xa_link)
+ out of sdcc-generated .xa files
+*/
+
+#define D(x) x
#include <stdio.h>
#include <stdlib.h>
#define printf(x...) fprintf(stderr,x)
#include "xa_main.h"
-
+#include "xa_version.h"
extern void yyrestart(FILE *new_file);
-extern void hexout(int byte, int memory_location, int end);
extern int yyparse();
+char modulename[PATH_MAX];
+char infilename[PATH_MAX];
+char outfilename[PATH_MAX];
+char listfilename[PATH_MAX];
+char symfilename[PATH_MAX];
+
/* global variables */
-FILE *fhex, *fmem, *list_fp, *sym_fp;
+FILE *frel, *fmem, *list_fp, *sym_fp;
extern FILE *yyin;
extern char *yytext;
extern char last_line_text[];
int lineno=1;
int p1=0, p2=0, p3=0;
int expr_result, expr_ok, jump_dest, inst;
-int opcode, operand;
+int opcode;
char symbol_name[1000];
struct area_struct area[NUM_AREAS];
-int current_area=AREA_CSEG;
+int current_area=0;
+char rel_line[2][132];
char *areaToString (int area) {
switch (area)
case AREA_XISEG: return "XISEG";
case AREA_XINIT: return "XINIT";
case AREA_GSINIT: return "GSINIT";
- case AREA_GSFINAL: return "GSFINAL";
- case AREA_HOME: return "HOME";
- case AREA_SSEG: return "SSEG";
+ //case AREA_GSFINAL: return "GSFINAL";
+ //case AREA_HOME: return "HOME";
+ //case AREA_SSEG: return "SSEG";
}
return ("UNKNOW");
}
{
struct symbol *new, *p;
-/* printf(" Symbol: %s Line: %d\n", thename, lineno); */
+ if ((p=findSymbol(thename))) {
+ if (p->isdef) {
+ fprintf (stderr, "error: symbol %s already defined\n", thename);
+ exit (1);
+ } else {
+ return p;
+ }
+ }
+
+ //printf(" Symbol: %s Line: %d\n", thename, lineno);
new = (struct symbol *) malloc(sizeof(struct symbol));
new->name = (char *) malloc(strlen(thename)+1);
strcpy(new->name, thename);
new->isreg = 0;
new->line_def = lineno - 1;
new->area = current_area;
+ new->mode = 'X'; // start with an external
new->next = NULL;
if (sym_list == NULL) return (sym_list = new);
p = sym_list;
return (new);
}
-int assign_value(char *thename, int thevalue)
-{
- struct symbol *p;
+struct symbol *findSymbol (char *thename) {
+ struct symbol *p;
+ for (p=sym_list; p; p=p->next) {
+ if (strcasecmp(thename, p->name)==0) {
+ return p;
+ }
+ }
+ return NULL;
+}
- p = sym_list;
- while (p != NULL) {
- if (!(strcasecmp(thename, p->name))) {
- p->value = thevalue;
- p->isdef = 1;
- return (0);
- }
- p = p->next;
- }
- fprintf(stderr, "Internal Error! Couldn't find symbol\n");
- exit(1);
+int assign_value(char *thename, int thevalue, char mode) {
+ struct symbol *p;
+
+ p = sym_list;
+ while (p != NULL) {
+ if (!(strcasecmp(thename, p->name))) {
+ p->area=current_area;
+ p->value = thevalue;
+ p->isdef = 1;
+ p->mode = mode;
+ return (0);
+ }
+ p = p->next;
+ }
+ fprintf(stderr, "Internal Error! Couldn't find symbol\n");
+ exit(1);
}
-int mk_bit(char *thename)
+int mk_bit(char *thename, int area)
{
struct symbol *p;
while (p != NULL) {
if (!(strcasecmp(thename, p->name))) {
p->isbit = 1;
+ p->area = area;
return (0);
}
p = p->next;
while (p != NULL) {
if (!(strcasecmp(thename, p->name))) {
p->issfr = 1;
+ p->area = 0;
return (0);
}
p = p->next;
exit(1);
}
-
+int mk_global(char *thename)
+{
+ struct symbol *p;
+
+ p = sym_list;
+ while (p != NULL) {
+ if (!(strcasecmp(thename, p->name))) {
+ p->global = 1;
+ return (0);
+ }
+ p = p->next;
+ }
+ fprintf(stderr, "Internal Error! Couldn't find symbol\n");
+ exit(1);
+}
int get_value(char *thename)
{
- struct symbol *p;
- p = sym_list;
- while (p != NULL) {
- if (!(strcasecmp(thename, p->name)))
- return (p->value);
- p = p->next;
- }
- fprintf(stderr, "Internal Error! Couldn't find symbol value\n");
- exit(1);
+ struct symbol *p;
+ p = sym_list;
+ while (p != NULL) {
+ if (!(strcasecmp(thename, p->name))) {
+ if (p->mode=='=')
+ ;//return 0;
+ return (p->value);
+ }
+ p = p->next;
+ }
+ fprintf(stderr, "Internal Error! Couldn't find symbol value\n");
+ exit(1);
}
fprintf(sym_fp, " Line %d\n", p->line_def);
#else
if (p->issfr) {
- fprintf (sym_fp, "%-5s", "SFR");
+ fprintf (sym_fp, "%-7s", "SFR");
} else if (p->isbit && !p->area) {
- fprintf (sym_fp, "%-5s", "SBIT");
+ fprintf (sym_fp, "%-7s", "SBIT");
+ } else if (p->mode=='=') {
+ fprintf (sym_fp,"ABS ");
+ } else if (!p->isdef) {
+ fprintf (sym_fp,"EXTRN ");
} else {
- fprintf (sym_fp, "%-5s", areaToString(p->area));
+ fprintf (sym_fp, "%-7s", areaToString(p->area));
}
fprintf (sym_fp, " 0x%04x (%5d)", p->value, p->value);
fprintf (sym_fp, " %s", p->isdef ? "D" : "-");
void check_redefine()
{
- struct symbol *p1, *p2;
- p1 = sym_list;
- while (p1 != NULL) {
- p2 = p1->next;
- while (p2 != NULL) {
- if (!strcasecmp(p1->name, p2->name)) {
- fprintf(stderr, "Error: symbol '%s' redefined on line %d", p1->name, p2->line_def);
- fprintf(stderr, ", first defined on line %d\n", p1->line_def);
- exit(1);
- }
- p2 = p2->next;
- }
- p1 = p1->next;
- }
+ struct symbol *p1, *p2;
+ p1 = sym_list;
+ while (p1 != NULL) {
+ p2 = p1->next;
+ while (p2 != NULL) {
+ if (!strcasecmp(p1->name, p2->name)) {
+ fprintf(stderr, "Error: symbol '%s' redefined on line %d",
+ p1->name, p2->line_def);
+ fprintf(stderr, ", first defined on line %d\n", p1->line_def);
+ exit(1);
+ }
+ p2 = p2->next;
+ }
+ p1 = p1->next;
+ }
}
int is_target(char *thename)
}
-int is_def(char *thename)
+struct symbol *is_def(char *thename)
{
- struct symbol *p;
- p = sym_list;
- while (p != NULL) {
- if (!strcasecmp(thename, p->name) && p->isdef) return(1);
- p = p->next;
- }
- return (0);
+ struct symbol *p;
+ p = sym_list;
+ while (p != NULL) {
+ if (!strcasecmp(thename, p->name) && p->isdef)
+ return p;
+ p = p->next;
+ }
+ return NULL;
+}
+
+struct symbol *is_ref(char *thename) {
+ struct symbol *p;
+ p = sym_list;
+ while (p != NULL) {
+ if (strcasecmp(thename, p->name)==0)
+ return p;
+ p = p->next;
+ }
+ return NULL;
+}
+
+int is_abs(char *thename) {
+ struct symbol *p;
+ p = sym_list;
+ while (p != NULL) {
+ if (strcasecmp(thename, p->name)==0)
+ return p->mode == '=';
+ p = p->next;
+ }
+ return 0;
}
/* this routine is used to dump a group of bytes to the output */
/* though is it expected that the lexer has placed all the actual */
/* original text from the line in "last_line_text" */
-void out(int *byte_list, int num)
-{
- int i, first=1;
-
- if (num > 0) fprintf(list_fp, "%06X: ", MEM_POS);
- else fprintf(list_fp, "\t");
-
- if (current_area==AREA_CSEG || current_area==AREA_XINIT) {
- for (i=0; i<num; i++) {
- hexout(byte_list[i], MEM_POS + i, 0);
- if (!first && (i % 4) == 0) fprintf(list_fp, "\t");
- fprintf(list_fp, "%02X", byte_list[i]);
- if ((i+1) % 4 == 0) {
- if (first) fprintf(list_fp, "\t%s\n", last_line_text);
- else fprintf(list_fp, "\n");
- first = 0;
- } else {
- if (i<num-1) fprintf(list_fp, " ");
+static short last_area=-1;
+
+int debug=0;
+
+void out(int *byte_list, int num) {
+ struct symbol *p;
+ int i, first=1;
+
+ if (num > 0) fprintf(list_fp, "%06X: ", MEM_POS);
+ else fprintf(list_fp, "\t");
+
+ if (last_area!=current_area) {
+ // emit area information
+ if (area[current_area].size) {
+ fprintf (frel, "A %s size %d flags 0\n",
+ areaToString(current_area),
+ area[current_area].size);
+ if (!area[current_area].defsEmitted) {
+ for (p=sym_list; p; p=p->next) {
+ if (p->global && p->isdef && p->area==current_area) {
+ // skip temp labels
+ if (p->name[strlen(p->name)-1]!='$') {
+ if (p->mode=='=') {
+ fprintf (frel, "S %s Abs%04x\n", p->name, p->value);
+ } else {
+ fprintf (frel, "S %s Def%04x\n", p->name, p->value);
+ }
}
}
}
- if (first) {
- if (num < 3) fprintf(list_fp, "\t");
- fprintf(list_fp, "\t%s\n", last_line_text);
- } else {
- if (num % 4) fprintf(list_fp, "\n");
+ area[current_area].defsEmitted=1;
+ }
+ }
+ last_area=current_area;
+ }
+ if (current_area==AREA_CSEG ||
+ current_area==AREA_GSINIT ||
+ current_area==AREA_XINIT) {
+ if (num) {
+ for (i=0; i<num; i++) {
+ if ((i%16)==0) {
+ fprintf (frel, "%sT %04x", i ? "\n" : "", MEM_POS+i);
+ }
+ fprintf (frel, " %02x", byte_list[i]);
+ }
+ fprintf (frel, "\n");
+ if (rel_line[0][0]) {
+ fprintf (frel, "%s\n", rel_line[0]);
+ if (rel_line[1][0]) {
+ fprintf (frel, "%s\n", rel_line[1]);
}
+ }
+ }
+ for (i=0; i<num; i++) {
+ if (!first && (i % 4) == 0) fprintf(list_fp, "\t");
+ fprintf(list_fp, "%02X", byte_list[i]);
+ if ((i+1) % 4 == 0) {
+ if (first) fprintf(list_fp, "\t%s\n", last_line_text);
+ else fprintf(list_fp, "\n");
+ first = 0;
+ } else {
+ if (i<num-1) fprintf(list_fp, " ");
+ }
+ }
+ }
+ if (first) {
+ if (num < 3) fprintf(list_fp, "\t");
+ fprintf(list_fp, "\t%s\n", last_line_text);
+ } else {
+ if (num % 4) fprintf(list_fp, "\n");
+ }
+ operand[0][0]='\0';
+ operand[1][0]='\0';
+ rel_line[0][0]='\0';
+ rel_line[1][0]='\0';
}
void pad_with_nop()
{
- static int nops[] = {NOP_OPCODE, NOP_OPCODE, NOP_OPCODE, NOP_OPCODE};
- int num;
-
- last_line_text[0] = '\0';
-
- for(num=0; (MEM_POS + num) % BRANCH_SPACING; num++) ;
- if (p3) out(nops, num);
- MEM_POS += num;
+ static int nops[] = {NOP_OPCODE, NOP_OPCODE, NOP_OPCODE, NOP_OPCODE};
+ int num;
+
+ last_line_text[0] = '\0';
+
+ for(num=0; (MEM_POS + num) % BRANCH_SPACING; num++) {
+ sprintf (last_line_text, "\tnop\t; word allignment");
+ }
+ if (p3) out(nops, num);
+ MEM_POS += num;
}
/* print branch out of bounds error */
exit(1);
}
-/* output the jump either direction on carry */
-/* jump_dest and MEM_POS must have the proper values */
-
-/*
-void do_jump_on_carry()
-{
- if (p3) {
- operand = REL4(jump_dest, MEM_POS);
- if (operand < 0) {
- operand *= -1;
- operand -= 1;
- if (operand > 15) boob_error();
- out(0x20 + (operand & 15));
- } else {
- if (operand > 15) boob_error();
- out(0x30 + (operand & 15));
- }
- }
-}
-*/
-
/* turn a string like "10010110b" into an int */
int binary2int(char *str)
void print_usage(int);
-
-/* todo: someday this will allow the user to control where the */
-/* various memory areas go, and it will take care of assigning */
-/* positions to area which follow others (such as OSEG getting */
-/* set just after DSEG on the 2nd and 3rd passes when we have */
-/* leared the size needed for each segment */
-
void init_areas(void)
{
area[AREA_CSEG].start=area[AREA_CSEG].alloc_position = 0;
- area[AREA_DSEG].start=area[AREA_DSEG].alloc_position = 0x30;
+ area[AREA_DSEG].start=area[AREA_DSEG].alloc_position = 0;
area[AREA_BSEG].start=area[AREA_BSEG].alloc_position = 0;
area[AREA_XSEG].start=area[AREA_XSEG].alloc_position = 0;
area[AREA_XISEG].start=area[AREA_XISEG].alloc_position = 0;
area[AREA_HOME].start=area[AREA_HOME].alloc_position = 0;
}
-void addAreaSymbols() {
- char buffer[132];
- int i;
- for (i=0; i<NUM_AREAS; i++) {
- current_area=i;
- sprintf (buffer, "s_%s", areaToString(i));
- build_sym_list (buffer);
- assign_value (buffer, area[i].start);
- buffer[0]='l';
- build_sym_list (buffer);
- assign_value (buffer, area[i].alloc_position-area[i].start);
+void relPrelude() {
+ //char buffer[132];
+ int i, areas=0, globals=0;
+ struct symbol *p;
+
+ fprintf (frel, "SDCCXA rel, version %1.1f\n", version);
+ for (i=1; i<NUM_AREAS; i++) {
+ if ((area[i].size=area[i].alloc_position-area[i].start)) {
+ areas++;
+ }
+ }
+ for (p=sym_list; p; p=p->next) {
+ if (p->isdef) {
+ // skip temp labels
+ if (p->name[strlen(p->name)-1]!='$') {
+ globals++;
+ }
+ }
+ }
+ fprintf (frel, "H %d areas %d global symbols\n", areas, globals);
+ fprintf (frel, "M %s\n", modulename);
+ for (p=sym_list; p; p=p->next) {
+ if (!p->isdef) {
+ fprintf (frel, "S %s Ref0000\n", p->name);
+ }
}
}
printf("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n");
}
-char infilename[PATH_MAX];
-char outfilename[PATH_MAX];
-char listfilename[PATH_MAX];
-char symfilename[PATH_MAX];
-//char mapfilename[PATH_MAX];
-
int verbose=0, createSymbolFile=0;
void process_args(int argc, char **argv)
strcpy(infilename, argv[i]);
- if (strncasecmp(infilename+strlen(infilename)-3, ".xa", 3)) {
+ if (strncasecmp(infilename+strlen(infilename)-4, ".asm", 3)) {
fprintf (stderr, "unrecognized input file: \"%s\"\n", argv[i]);
print_usage(1);
}
- strcpy(outfilename, infilename);
- outfilename[strlen(outfilename)-3] = '\0';
- strcpy(listfilename, outfilename);
+ strcpy(modulename, infilename);
+ modulename[strlen(modulename)-4] = '\0';
+ sprintf (outfilename, "%s.rel", modulename);
+ sprintf (listfilename, "%s.lst", modulename);
if (createSymbolFile) {
- strcpy(symfilename, outfilename);
- strcat(symfilename, ".sym");
+ sprintf (symfilename, "%s.sym", modulename);
}
- //strcpy(mapfilename, outfilename);
- strcat(outfilename, ".hex");
- strcat(listfilename, ".lst");
- //strcat(mapfilename, ".map");
}
/* pass #1 (p1=1) find all symbol defs and branch target names */
fprintf(stderr, "Can't open file '%s'.\n", infilename);
exit(1);
}
- fhex = fopen(outfilename, "w");
- if (fhex == NULL) {
+ frel = fopen(outfilename, "w");
+ if (frel == NULL) {
fprintf(stderr, "Can't write file '%s'.\n", outfilename);
exit(1);
}
init_areas();
yyparse();
- addAreaSymbols();
+ relPrelude();
if (createSymbolFile) print_symbol_table();
if (verbose) printf("Pass 3: Generating Object Code:\n");
yyparse();
fclose(yyin);
- hexout(0, 0, 1); /* flush and close intel hex file output */
return 0;
}
projects / fw / sdcc / blobdiff