i386/nasm/outdbg.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /* outdbg.c     output routines for the Netwide Assembler to produce
  25  *              a debugging trace
  26  *
  27  * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
  28  * Julian Hall. All rights reserved. The software is
  29  * redistributable under the licence given in the file "Licence"
  30  * distributed in the NASM archive.
  31  */
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <ctype.h>
  37
  38 #include "nasm.h"
  39 #include "nasmlib.h"
  40 #include "outform.h"
  41
  42 #ifdef OF_DBG
  43
  44 struct Section {
  45     struct Section *next;
  46     long number;
  47     char *name;
  48 } *dbgsect;
  49
  50 FILE *dbgf;
  51 efunc dbgef;
  52
  53 static void dbg_init(FILE *fp, efunc errfunc, ldfunc ldef, evalfunc eval)
  54 {
  55     dbgf = fp;
  56     dbgef = errfunc;
  57     dbgsect = NULL;
  58     (void) ldef;
  59     fprintf(fp,"NASM Output format debug dump\n");
  60 }
  61
  62 static void dbg_cleanup(void)
  63 {
  64     while (dbgsect) {
  65         struct Section *tmp = dbgsect;
  66         dbgsect = dbgsect->next;
  67         nasm_free (tmp->name);
  68         nasm_free (tmp);
  69     }
  70     fclose(dbgf);
  71 }
  72
  73 static long dbg_section_names (char *name, int pass, int *bits)
  74 {
  75     int seg;
  76
  77     /*
  78      * We must have an initial default: let's make it 16.
  79      */
  80     if (!name)
  81         *bits = 16;
  82
  83     if (!name)
  84         fprintf(dbgf, "section_name on init: returning %d\n",
  85                 seg = seg_alloc());
  86     else {
  87         int n = strcspn(name, " \t");
  88         char *sname = nasm_strndup(name, n);
  89         struct Section *s;
  90
  91         seg = NO_SEG;
  92         for (s = dbgsect; s; s = s->next)
  93             if (!strcmp(s->name, sname))
  94                 seg = s->number;
  95
  96         if (seg == NO_SEG) {
  97             s = nasm_malloc(sizeof(*s));
  98             s->name = sname;
  99             s->number = seg = seg_alloc();
 100             s->next = dbgsect;
 101             dbgsect = s;
 102             fprintf(dbgf, "section_name %s (pass %d): returning %d\n",
 103                     name, pass, seg);
 104         }
 105     }
 106     return seg;
 107 }
 108
 109 static void dbg_deflabel (char *name, long segment, long offset,
 110                           int is_global, char *special) {
 111     fprintf(dbgf,"deflabel %s := %08lx:%08lx %s (%d)%s%s\n",
 112             name, segment, offset,
 113             is_global == 2 ? "common" : is_global ? "global" : "local",
 114             is_global,
 115             special ? ": " : "", special);
 116 }
 117
 118 static void dbg_out (long segto, void *data, unsigned long type,
 119                      long segment, long wrt) {
 120     long realbytes = type & OUT_SIZMASK;
 121     long ldata;
 122     int id;
 123
 124     type &= OUT_TYPMASK;
 125
 126     fprintf(dbgf,"out to %lx, len = %ld: ",segto,realbytes);
 127
 128     switch(type) {
 129       case OUT_RESERVE:
 130         fprintf(dbgf,"reserved.\n"); break;
 131       case OUT_RAWDATA:
 132         fprintf(dbgf,"raw data = ");
 133         while (realbytes--) {
 134             id = *(unsigned char *)data;
 135             data = (char *)data + 1;
 136             fprintf(dbgf,"%02x ",id);
 137         }
 138         fprintf(dbgf,"\n"); break;
 139       case OUT_ADDRESS:
 140         ldata = 0; /* placate gcc */
 141         if (realbytes == 1)
 142             ldata = *((char *)data);
 143         else if (realbytes == 2)
 144             ldata = *((short *)data);
 145         else if (realbytes == 4)
 146             ldata = *((long *)data);
 147         fprintf(dbgf,"addr %08lx (seg %08lx, wrt %08lx)\n",ldata,
 148                 segment,wrt);break;
 149       case OUT_REL2ADR:
 150         fprintf(dbgf,"rel2adr %04x (seg %08lx)\n",(int)*(short *)data,segment);
 151         break;
 152       case OUT_REL4ADR:
 153         fprintf(dbgf,"rel4adr %08lx (seg %08lx)\n",*(long *)data,segment);
 154         break;
 155       default:
 156         fprintf(dbgf,"unknown\n");
 157         break;
 158     }
 159 }
 160
 161 static long dbg_segbase(long segment) {
 162     return segment;
 163 }
 164
 165 static int dbg_directive (char *directive, char *value, int pass) {
 166     fprintf(dbgf, "directive [%s] value [%s] (pass %d)\n",
 167             directive, value, pass);
 168     return 1;
 169 }
 170
 171 static void dbg_filename (char *inname, char *outname, efunc error) {
 172     standard_extension (inname, outname, ".dbg", error);
 173 }
 174
 175 struct ofmt of_dbg = {
 176     "Trace of all info passed to output stage",
 177     "dbg",
 178     NULL,
 179     dbg_init,
 180     dbg_out,
 181     dbg_deflabel,
 182     dbg_section_names,
 183     dbg_segbase,
 184     dbg_directive,
 185     dbg_filename,
 186     dbg_cleanup
 187 };
 188
 189 #endif /* OF_DBG */