gdb/tui/tuiDisassem.c

   1 /* Disassembly display.
   2    Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
   3    Contributed by Hewlett-Packard Company.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "symtab.h"
  24 #include "breakpoint.h"
  25 #include "frame.h"
  26
  27 #include "tui.h"
  28 #include "tuiData.h"
  29 #include "tuiWin.h"
  30 #include "tuiLayout.h"
  31 #include "tuiSourceWin.h"
  32 #include "tuiStack.h"
  33 #include "tui-file.h"
  34
  35
  36 /*****************************************
  37 ** STATIC LOCAL FUNCTIONS FORWARD DECLS    **
  38 ******************************************/
  39
  40 static struct breakpoint *_hasBreak (CORE_ADDR);
  41
  42
  43 /*****************************************
  44 ** PUBLIC FUNCTIONS                        **
  45 ******************************************/
  46
  47 /*
  48    ** tuiSetDisassemContent().
  49    **        Function to set the disassembly window's content.
  50  */
  51 TuiStatus
  52 tuiSetDisassemContent (struct symtab *s, CORE_ADDR startAddr)
  53 {
  54   TuiStatus ret = TUI_FAILURE;
  55   struct ui_file *gdb_dis_out;
  56
  57   if (startAddr != 0)
  58     {
  59       register int i, desc;
  60
  61       if ((ret = tuiAllocSourceBuffer (disassemWin)) == TUI_SUCCESS)
  62         {
  63           register int offset = disassemWin->detail.sourceInfo.horizontalOffset;
  64           register int threshold, curLine = 0, lineWidth, maxLines;
  65           CORE_ADDR newpc, pc;
  66           disassemble_info asmInfo;
  67           TuiGenWinInfoPtr locator = locatorWinInfoPtr ();
  68 extern void strcat_address (CORE_ADDR, char *, int);
  69 extern void strcat_address_numeric (CORE_ADDR, int, char *, int);
  70           int curLen = 0;
  71           int tab_len = tuiDefaultTabLen ();
  72
  73           maxLines = disassemWin->generic.height - 2;   /* account for hilite */
  74           lineWidth = disassemWin->generic.width - 1;
  75           threshold = (lineWidth - 1) + offset;
  76
  77           /* now init the ui_file structure */
  78           gdb_dis_out = tui_sfileopen (threshold);
  79
  80           asmInfo = tm_print_insn_info;
  81           asmInfo.stream = gdb_dis_out;
  82
  83           disassemWin->detail.sourceInfo.startLineOrAddr.addr = startAddr;
  84
  85           /* Now construct each line */
  86           for (curLine = 0, pc = startAddr; (curLine < maxLines);)
  87             {
  88               TuiWinElementPtr element = (TuiWinElementPtr) disassemWin->generic.content[curLine];
  89               struct breakpoint *bp;
  90
  91               print_address (pc, gdb_dis_out);
  92
  93               curLen = strlen (tui_file_get_strbuf (gdb_dis_out));
  94               i = curLen - ((curLen / tab_len) * tab_len);
  95
  96               /* adjust buffer length if necessary */
  97               tui_file_adjust_strbuf ((tab_len - i > 0) ? (tab_len - i) : 0, gdb_dis_out);
  98
  99               /* Add spaces to make the instructions start onthe same column */
 100               while (i < tab_len)
 101                 {
 102                   tui_file_get_strbuf (gdb_dis_out)[curLen] = ' ';
 103                   i++;
 104                   curLen++;
 105                 }
 106               tui_file_get_strbuf (gdb_dis_out)[curLen] = '\0';
 107
 108               newpc = pc + ((*tm_print_insn) (pc, &asmInfo));
 109
 110               /* Now copy the line taking the offset into account */
 111               if (strlen (tui_file_get_strbuf (gdb_dis_out)) > offset)
 112                 strcpy (element->whichElement.source.line,
 113                         &(tui_file_get_strbuf (gdb_dis_out)[offset]));
 114               else
 115                 element->whichElement.source.line[0] = '\0';
 116               element->whichElement.source.lineOrAddr.addr = pc;
 117               element->whichElement.source.isExecPoint =
 118                 (pc == (CORE_ADDR) ((TuiWinElementPtr) locator->content[0])->whichElement.locator.addr);
 119               bp = _hasBreak (pc);
 120               element->whichElement.source.hasBreak =
 121                 (bp != (struct breakpoint *) NULL &&
 122                  (!element->whichElement.source.isExecPoint ||
 123                   (bp->disposition != disp_del || bp->hit_count <= 0)));
 124               curLine++;
 125               pc = newpc;
 126               /* reset the buffer to empty */
 127               tui_file_get_strbuf (gdb_dis_out)[0] = '\0';
 128             }
 129           ui_file_delete (gdb_dis_out);
 130           gdb_dis_out = NULL;
 131           disassemWin->generic.contentSize = curLine;
 132           ret = TUI_SUCCESS;
 133         }
 134     }
 135
 136   return ret;
 137 }                               /* tuiSetDisassemContent */
 138
 139
 140 /*
 141    ** tuiShowDisassem().
 142    **        Function to display the disassembly window with disassembled code.
 143  */
 144 void
 145 tuiShowDisassem (CORE_ADDR startAddr)
 146 {
 147   struct symtab *s = find_pc_symtab (startAddr);
 148   TuiWinInfoPtr winWithFocus = tuiWinWithFocus ();
 149   TuiLineOrAddress val;
 150
 151   val.addr = startAddr;
 152   tuiAddWinToLayout (DISASSEM_WIN);
 153   tuiUpdateSourceWindow (disassemWin, s, val, FALSE);
 154   /*
 155      ** if the focus was in the src win, put it in the asm win, if the
 156      ** source view isn't split
 157    */
 158   if (currentLayout () != SRC_DISASSEM_COMMAND && winWithFocus == srcWin)
 159     tuiSetWinFocusTo (disassemWin);
 160
 161   return;
 162 }                               /* tuiShowDisassem */
 163
 164
 165 /*
 166    ** tuiShowDisassemAndUpdateSource().
 167    **        Function to display the disassembly window.
 168  */
 169 void
 170 tuiShowDisassemAndUpdateSource (CORE_ADDR startAddr)
 171 {
 172   struct symtab_and_line sal;
 173
 174   tuiShowDisassem (startAddr);
 175   if (currentLayout () == SRC_DISASSEM_COMMAND)
 176     {
 177       TuiLineOrAddress val;
 178       TuiGenWinInfoPtr locator = locatorWinInfoPtr ();
 179       /*
 180          ** Update what is in the source window if it is displayed too,
 181          ** note that it follows what is in the disassembly window and visa-versa
 182        */
 183       sal = find_pc_line (startAddr, 0);
 184       val.lineNo = sal.line;
 185       tuiUpdateSourceWindow (srcWin, sal.symtab, val, TRUE);
 186       if (sal.symtab)
 187         {
 188           current_source_symtab = sal.symtab;
 189           tuiUpdateLocatorFilename (sal.symtab->filename);
 190         }
 191       else
 192         tuiUpdateLocatorFilename ("?");
 193     }
 194
 195   return;
 196 }                               /* tuiShowDisassemAndUpdateSource */
 197
 198 /*
 199    ** tuiGetBeginAsmAddress().
 200  */
 201 CORE_ADDR
 202 tuiGetBeginAsmAddress (void)
 203 {
 204   TuiGenWinInfoPtr locator;
 205   TuiLocatorElementPtr element;
 206   CORE_ADDR addr;
 207
 208   locator = locatorWinInfoPtr ();
 209   element = &((TuiWinElementPtr) locator->content[0])->whichElement.locator;
 210
 211   if (element->addr == 0)
 212     {
 213       /*the target is not executing, because the pc is 0 */
 214
 215       addr = parse_and_eval_address ("main");
 216
 217       if (addr == 0)
 218         addr = parse_and_eval_address ("MAIN");
 219
 220     }
 221   else                          /* the target is executing */
 222     addr = element->addr;
 223
 224   return addr;
 225 }                               /* tuiGetBeginAsmAddress */
 226
 227
 228 /*
 229    ** tuiVerticalDisassemScroll().
 230    **      Scroll the disassembly forward or backward vertically
 231  */
 232 void
 233 tuiVerticalDisassemScroll (TuiScrollDirection scrollDirection,
 234                            int numToScroll)
 235 {
 236   if (disassemWin->generic.content != (OpaquePtr) NULL)
 237     {
 238       CORE_ADDR pc, lowAddr;
 239       TuiWinContent content;
 240       struct symtab *s;
 241
 242       content = (TuiWinContent) disassemWin->generic.content;
 243       if (current_source_symtab == (struct symtab *) NULL)
 244         s = find_pc_symtab (selected_frame->pc);
 245       else
 246         s = current_source_symtab;
 247
 248       pc = content[0]->whichElement.source.lineOrAddr.addr;
 249       if (find_pc_partial_function (pc, (char **) NULL, &lowAddr,
 250                                     (CORE_ADDR) 0) == 0)
 251         error ("No function contains program counter for selected frame.\n");
 252       else
 253         {
 254           register int line = 0;
 255           register CORE_ADDR newLow;
 256           bfd_byte buffer[4];
 257           TuiLineOrAddress val;
 258
 259           newLow = pc;
 260           if (scrollDirection == FORWARD_SCROLL)
 261             {
 262               for (; line < numToScroll; line++)
 263                 newLow += sizeof (bfd_getb32 (buffer));
 264             }
 265           else
 266             {
 267               for (; newLow != 0 && line < numToScroll; line++)
 268                 newLow -= sizeof (bfd_getb32 (buffer));
 269             }
 270           val.addr = newLow;
 271           tuiUpdateSourceWindowAsIs (disassemWin, s, val, FALSE);
 272         }
 273     }
 274
 275   return;
 276 }                               /* tuiVerticalDisassemScroll */
 277
 278
 279
 280 /*****************************************
 281 ** STATIC LOCAL FUNCTIONS                 **
 282 ******************************************/
 283 /*
 284    ** _hasBreak().
 285    **      Answer whether there is a break point at the input line in the
 286    **      source file indicated
 287  */
 288 static struct breakpoint *
 289 _hasBreak (CORE_ADDR addr)
 290 {
 291   struct breakpoint *bpWithBreak = (struct breakpoint *) NULL;
 292   struct breakpoint *bp;
 293   extern struct breakpoint *breakpoint_chain;
 294
 295
 296   for (bp = breakpoint_chain;
 297        (bp != (struct breakpoint *) NULL &&
 298         bpWithBreak == (struct breakpoint *) NULL);
 299        bp = bp->next)
 300     if (addr == bp->address)
 301       bpWithBreak = bp;
 302
 303   return bpWithBreak;
 304 }                               /* _hasBreak */