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/* outdbg.c output routines for the Netwide Assembler to produce
* a debugging trace
*
* The Netwide Assembler is copyright (C) 1996 Simon Tatham and
* Julian Hall. All rights reserved. The software is
* redistributable under the licence given in the file "Licence"
* distributed in the NASM archive.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "nasm.h"
#include "nasmlib.h"
#include "outform.h"
#ifdef OF_DBG
struct Section {
struct Section *next;
long number;
char *name;
} *dbgsect;
FILE *dbgf;
efunc dbgef;
static void dbg_init(FILE *fp, efunc errfunc, ldfunc ldef, evalfunc eval)
{
dbgf = fp;
dbgef = errfunc;
dbgsect = NULL;
(void) ldef;
fprintf(fp,"NASM Output format debug dump\n");
}
static void dbg_cleanup(void)
{
while (dbgsect) {
struct Section *tmp = dbgsect;
dbgsect = dbgsect->next;
nasm_free (tmp->name);
nasm_free (tmp);
}
fclose(dbgf);
}
static long dbg_section_names (char *name, int pass, int *bits)
{
int seg;
/*
* We must have an initial default: let's make it 16.
*/
if (!name)
*bits = 16;
if (!name)
fprintf(dbgf, "section_name on init: returning %d\n",
seg = seg_alloc());
else {
int n = strcspn(name, " \t");
char *sname = nasm_strndup(name, n);
struct Section *s;
seg = NO_SEG;
for (s = dbgsect; s; s = s->next)
if (!strcmp(s->name, sname))
seg = s->number;
if (seg == NO_SEG) {
s = nasm_malloc(sizeof(*s));
s->name = sname;
s->number = seg = seg_alloc();
s->next = dbgsect;
dbgsect = s;
fprintf(dbgf, "section_name %s (pass %d): returning %d\n",
name, pass, seg);
}
}
return seg;
}
static void dbg_deflabel (char *name, long segment, long offset,
int is_global, char *special) {
fprintf(dbgf,"deflabel %s := %08lx:%08lx %s (%d)%s%s\n",
name, segment, offset,
is_global == 2 ? "common" : is_global ? "global" : "local",
is_global,
special ? ": " : "", special);
}
static void dbg_out (long segto, void *data, unsigned long type,
long segment, long wrt) {
long realbytes = type & OUT_SIZMASK;
long ldata;
int id;
type &= OUT_TYPMASK;
fprintf(dbgf,"out to %lx, len = %ld: ",segto,realbytes);
switch(type) {
case OUT_RESERVE:
fprintf(dbgf,"reserved.\n"); break;
case OUT_RAWDATA:
fprintf(dbgf,"raw data = ");
while (realbytes--) {
id = *(unsigned char *)data;
data = (char *)data + 1;
fprintf(dbgf,"%02x ",id);
}
fprintf(dbgf,"\n"); break;
case OUT_ADDRESS:
ldata = 0; /* placate gcc */
if (realbytes == 1)
ldata = *((char *)data);
else if (realbytes == 2)
ldata = *((short *)data);
else if (realbytes == 4)
ldata = *((long *)data);
fprintf(dbgf,"addr %08lx (seg %08lx, wrt %08lx)\n",ldata,
segment,wrt);break;
case OUT_REL2ADR:
fprintf(dbgf,"rel2adr %04x (seg %08lx)\n",(int)*(short *)data,segment);
break;
case OUT_REL4ADR:
fprintf(dbgf,"rel4adr %08lx (seg %08lx)\n",*(long *)data,segment);
break;
default:
fprintf(dbgf,"unknown\n");
break;
}
}
static long dbg_segbase(long segment) {
return segment;
}
static int dbg_directive (char *directive, char *value, int pass) {
fprintf(dbgf, "directive [%s] value [%s] (pass %d)\n",
directive, value, pass);
return 1;
}
static void dbg_filename (char *inname, char *outname, efunc error) {
standard_extension (inname, outname, ".dbg", error);
}
struct ofmt of_dbg = {
"Trace of all info passed to output stage",
"dbg",
NULL,
dbg_init,
dbg_out,
dbg_deflabel,
dbg_section_names,
dbg_segbase,
dbg_directive,
dbg_filename,
dbg_cleanup
};
#endif /* OF_DBG */
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