outdbg.c

   1 /* outdbg.c     output routines for the Netwide Assembler to produce
   2  *              a debugging trace
   3  *
   4  * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
   5  * Julian Hall. All rights reserved. The software is
   6  * redistributable under the licence given in the file "Licence"
   7  * distributed in the NASM archive.
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <ctype.h>
  14
  15 #include "nasm.h"
  16 #include "nasmlib.h"
  17 #include "outform.h"
  18
  19 #ifdef OF_DBG
  20
  21 struct Section {
  22     struct Section *next;
  23     long number;
  24     char *name;
  25 } *dbgsect;
  26
  27 FILE *dbgf;
  28 efunc dbgef;
  29
  30 struct ofmt of_dbg;
  31 static void dbg_init(FILE *fp, efunc errfunc, ldfunc ldef, evalfunc eval)
  32 {
  33     (void) eval;
  34
  35     dbgf = fp;
  36     dbgef = errfunc;
  37     dbgsect = NULL;
  38     (void) ldef;
  39     fprintf(fp,"NASM Output format debug dump\n");
  40     of_dbg.current_dfmt->init(&of_dbg,0,fp,errfunc);
  41
  42 }
  43
  44 static void dbg_cleanup(int debuginfo)
  45 {
  46     (void) debuginfo;
  47     of_dbg.current_dfmt->cleanup();
  48     while (dbgsect) {
  49         struct Section *tmp = dbgsect;
  50         dbgsect = dbgsect->next;
  51         nasm_free (tmp->name);
  52         nasm_free (tmp);
  53     }
  54     fclose(dbgf);
  55 }
  56
  57 static long dbg_section_names (char *name, int pass, int *bits)
  58 {
  59     int seg;
  60
  61     /*
  62      * We must have an initial default: let's make it 16.
  63      */
  64     if (!name)
  65         *bits = 16;
  66
  67     if (!name)
  68         fprintf(dbgf, "section_name on init: returning %d\n",
  69                 seg = seg_alloc());
  70     else {
  71         int n = strcspn(name, " \t");
  72         char *sname = nasm_strndup(name, n);
  73         struct Section *s;
  74
  75         seg = NO_SEG;
  76         for (s = dbgsect; s; s = s->next)
  77             if (!strcmp(s->name, sname))
  78                 seg = s->number;
  79
  80         if (seg == NO_SEG) {
  81             s = nasm_malloc(sizeof(*s));
  82             s->name = sname;
  83             s->number = seg = seg_alloc();
  84             s->next = dbgsect;
  85             dbgsect = s;
  86             fprintf(dbgf, "section_name %s (pass %d): returning %d\n",
  87                     name, pass, seg);
  88         }
  89     }
  90     return seg;
  91 }
  92
  93 static void dbg_deflabel (char *name, long segment, long offset,
  94                           int is_global, char *special)
  95 {
  96     fprintf(dbgf,"deflabel %s := %08lx:%08lx %s (%d)%s%s\n",
  97             name, segment, offset,
  98             is_global == 2 ? "common" : is_global ? "global" : "local",
  99             is_global,
 100             special ? ": " : "", special);
 101 }
 102
 103 static void dbg_out (long segto, void *data, unsigned long type,
 104                      long segment, long wrt)
 105 {
 106     long realbytes = type & OUT_SIZMASK;
 107     long ldata;
 108     int id;
 109
 110     type &= OUT_TYPMASK;
 111
 112     fprintf(dbgf,"out to %lx, len = %ld: ",segto,realbytes);
 113
 114     switch(type) {
 115       case OUT_RESERVE:
 116         fprintf(dbgf,"reserved.\n"); break;
 117       case OUT_RAWDATA:
 118         fprintf(dbgf,"raw data = ");
 119         while (realbytes--) {
 120             id = *(unsigned char *)data;
 121             data = (char *)data + 1;
 122             fprintf(dbgf,"%02x ",id);
 123         }
 124         fprintf(dbgf,"\n"); break;
 125       case OUT_ADDRESS:
 126         ldata = 0; /* placate gcc */
 127         if (realbytes == 1)
 128             ldata = *((char *)data);
 129         else if (realbytes == 2)
 130             ldata = *((short *)data);
 131         else if (realbytes == 4)
 132             ldata = *((long *)data);
 133         fprintf(dbgf,"addr %08lx (seg %08lx, wrt %08lx)\n",ldata,
 134                 segment,wrt);break;
 135       case OUT_REL2ADR:
 136         fprintf(dbgf,"rel2adr %04x (seg %08lx)\n",(int)*(short *)data,segment);
 137         break;
 138       case OUT_REL4ADR:
 139         fprintf(dbgf,"rel4adr %08lx (seg %08lx)\n",*(long *)data,segment);
 140         break;
 141       default:
 142         fprintf(dbgf,"unknown\n");
 143         break;
 144     }
 145 }
 146
 147 static long dbg_segbase(long segment)
 148 {
 149     return segment;
 150 }
 151
 152 static int dbg_directive (char *directive, char *value, int pass)
 153 {
 154     fprintf(dbgf, "directive [%s] value [%s] (pass %d)\n",
 155             directive, value, pass);
 156     return 1;
 157 }
 158
 159 static void dbg_filename (char *inname, char *outname, efunc error)
 160 {
 161     standard_extension (inname, outname, ".dbg", error);
 162 }
 163
 164 static int dbg_set_info(enum geninfo type, char **val)
 165 {
 166     (void) type;
 167     (void) val;
 168     return 0;
 169 }
 170 char *types[] = {
 171         "unknown", "label", "byte","word","dword","float","qword","tbyte"
 172 };
 173 void dbgdbg_init(struct ofmt * of, void * id, FILE * fp, efunc error)
 174 {
 175     (void) of;
 176     (void) id;
 177     (void) fp;
 178     (void) error;
 179     fprintf(fp,"   With debug info\n");
 180 }
 181 static void dbgdbg_cleanup(void)
 182 {
 183 }
 184
 185 static void dbgdbg_linnum (const char *lnfname, long lineno, long segto)
 186 {
 187     fprintf(dbgf,"dbglinenum %s(%ld) := %08lx\n",
 188         lnfname,lineno,segto);
 189 }
 190 static void dbgdbg_deflabel (char *name, long segment,
 191                           long offset, int is_global, char *special)
 192 {
 193     fprintf(dbgf,"dbglabel %s := %08lx:%08lx %s (%d)%s%s\n",
 194             name,
 195             segment, offset,
 196             is_global == 2 ? "common" : is_global ? "global" : "local",
 197             is_global,
 198             special ? ": " : "", special);
 199 }
 200 static void dbgdbg_define(const char *type, const char *params)
 201 {
 202     fprintf(dbgf,"dbgdirective [%s] value [%s]\n",type, params);
 203 }
 204 static void dbgdbg_output (int output_type, void *param)
 205 {
 206     (void) output_type;
 207     (void) param;
 208 }
 209 static void dbgdbg_typevalue(long type)
 210 {
 211         fprintf(dbgf,"new type: %s(%lX)\n",
 212             types[TYM_TYPE(type) >> 3], TYM_ELEMENTS(type) );
 213 }
 214 static struct dfmt debug_debug_form = {
 215     "Trace of all info passed to debug stage",
 216     "debug",
 217     dbgdbg_init,
 218     dbgdbg_linnum,
 219     dbgdbg_deflabel,
 220     dbgdbg_define,
 221     dbgdbg_typevalue,
 222     dbgdbg_output,
 223     dbgdbg_cleanup,
 224 };
 225
 226 static struct dfmt *debug_debug_arr[3] = {
 227         &debug_debug_form,
 228         &null_debug_form,
 229         NULL
 230 };
 231 struct ofmt of_dbg = {
 232     "Trace of all info passed to output stage",
 233     "dbg",
 234     NULL,
 235     debug_debug_arr,
 236     &null_debug_form,
 237     NULL,
 238     dbg_init,
 239     dbg_set_info,
 240     dbg_out,
 241     dbg_deflabel,
 242     dbg_section_names,
 243     dbg_segbase,
 244     dbg_directive,
 245     dbg_filename,
 246     dbg_cleanup
 247 };
 248
 249 #endif /* OF_DBG */