OpenE2K
/
binutils-gdb
12
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
binutils-gdb/gdb/tui/tuiDisassem.c

416 lines
11 KiB
C
Raw Blame History

/* Disassembly display.
Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation,
Inc.
Contributed by Hewlett-Packard Company.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "symtab.h"
#include "breakpoint.h"
#include "frame.h"
#include "value.h"
#include "source.h"
#include "disasm.h"
#include "tui.h"
#include "tuiData.h"
#include "tuiWin.h"
#include "tuiLayout.h"
#include "tuiSourceWin.h"
#include "tuiStack.h"
#include "tui-file.h"
#ifdef HAVE_NCURSES_H
#include <ncurses.h>
#else
#ifdef HAVE_CURSES_H
#include <curses.h>
#endif
#endif
struct tui_asm_line
{
CORE_ADDR addr;
char* addr_string;
char* insn;
};
/* Function to set the disassembly window's content.
Disassemble count lines starting at pc.
Return address of the count'th instruction after pc. */
static CORE_ADDR
tui_disassemble (struct tui_asm_line* lines, CORE_ADDR pc, int count)
{
struct ui_file *gdb_dis_out;
/* now init the ui_file structure */
gdb_dis_out = tui_sfileopen (256);
/* Now construct each line */
for (; count > 0; count--, lines++)
{
if (lines->addr_string)
xfree (lines->addr_string);
if (lines->insn)
xfree (lines->insn);
print_address (pc, gdb_dis_out);
lines->addr = pc;
lines->addr_string = xstrdup (tui_file_get_strbuf (gdb_dis_out));
ui_file_rewind (gdb_dis_out);
pc = pc + gdb_print_insn (pc, gdb_dis_out);
lines->insn = xstrdup (tui_file_get_strbuf (gdb_dis_out));
/* reset the buffer to empty */
ui_file_rewind (gdb_dis_out);
}
ui_file_delete (gdb_dis_out);
return pc;
}
/* Find the disassembly address that corresponds to FROM lines
above or below the PC. Variable sized instructions are taken
into account by the algorithm. */
static CORE_ADDR
tui_find_disassembly_address (CORE_ADDR pc, int from)
{
register CORE_ADDR newLow;
int maxLines;
int i;
struct tui_asm_line* lines;
maxLines = (from > 0) ? from : - from;
if (maxLines <= 1)
return pc;
lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line)
* maxLines);
memset (lines, 0, sizeof (struct tui_asm_line) * maxLines);
newLow = pc;
if (from > 0)
{
tui_disassemble (lines, pc, maxLines);
newLow = lines[maxLines - 1].addr;
}
else
{
CORE_ADDR last_addr;
int pos;
struct minimal_symbol* msymbol;
/* Find backward an address which is a symbol
and for which disassembling from that address will fill
completely the window. */
pos = maxLines - 1;
do {
newLow -= 1 * maxLines;
msymbol = lookup_minimal_symbol_by_pc_section (newLow, 0);
if (msymbol)
newLow = SYMBOL_VALUE_ADDRESS (msymbol);
else
newLow += 1 * maxLines;
tui_disassemble (lines, newLow, maxLines);
last_addr = lines[pos].addr;
} while (last_addr > pc && msymbol);
/* Scan forward disassembling one instruction at a time
until the last visible instruction of the window
matches the pc. We keep the disassembled instructions
in the 'lines' window and shift it downward (increasing
its addresses). */
if (last_addr < pc)
do
{
CORE_ADDR next_addr;
pos++;
if (pos >= maxLines)
pos = 0;
next_addr = tui_disassemble (&lines[pos], last_addr, 1);
/* If there are some problems while disassembling exit. */
if (next_addr <= last_addr)
break;
last_addr = next_addr;
} while (last_addr <= pc);
pos++;
if (pos >= maxLines)
pos = 0;
newLow = lines[pos].addr;
}
for (i = 0; i < maxLines; i++)
{
xfree (lines[i].addr_string);
xfree (lines[i].insn);
}
return newLow;
}
/* Function to set the disassembly window's content. */
TuiStatus
tuiSetDisassemContent (CORE_ADDR pc)
{
TuiStatus ret = TUI_FAILURE;
register int i;
register int offset = disassemWin->detail.sourceInfo.horizontalOffset;
register int lineWidth, maxLines;
CORE_ADDR cur_pc;
TuiGenWinInfoPtr locator = locatorWinInfoPtr ();
int tab_len = tuiDefaultTabLen ();
struct tui_asm_line* lines;
int insn_pos;
int addr_size, max_size;
char* line;
if (pc == 0)
return TUI_FAILURE;
ret = tuiAllocSourceBuffer (disassemWin);
if (ret != TUI_SUCCESS)
return ret;
disassemWin->detail.sourceInfo.startLineOrAddr.addr = pc;
cur_pc = (CORE_ADDR)
(((TuiWinElementPtr) locator->content[0])->whichElement.locator.addr);
maxLines = disassemWin->generic.height - 2; /* account for hilite */
/* Get temporary table that will hold all strings (addr & insn). */
lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line)
* maxLines);
memset (lines, 0, sizeof (struct tui_asm_line) * maxLines);
lineWidth = disassemWin->generic.width - 1;
tui_disassemble (lines, pc, maxLines);
/* See what is the maximum length of an address and of a line. */
addr_size = 0;
max_size = 0;
for (i = 0; i < maxLines; i++)
{
size_t len = strlen (lines[i].addr_string);
if (len > addr_size)
addr_size = len;
len = strlen (lines[i].insn) + tab_len;
if (len > max_size)
max_size = len;
}
max_size += addr_size + tab_len;
/* Allocate memory to create each line. */
line = (char*) alloca (max_size);
insn_pos = (1 + (addr_size / tab_len)) * tab_len;
/* Now construct each line */
for (i = 0; i < maxLines; i++)
{
TuiWinElementPtr element;
TuiSourceElement* src;
int curLen;
element = (TuiWinElementPtr) disassemWin->generic.content[i];
src = &element->whichElement.source;
strcpy (line, lines[i].addr_string);
curLen = strlen (line);
/* Add spaces to make the instructions start on the same column */
while (curLen < insn_pos)
{
strcat (line, " ");
curLen++;
}
strcat (line, lines[i].insn);
/* Now copy the line taking the offset into account */
if (strlen (line) > offset)
strcpy (src->line, &line[offset]);
else
src->line[0] = '\0';
src->lineOrAddr.addr = lines[i].addr;
src->isExecPoint = lines[i].addr == cur_pc;
/* See whether there is a breakpoint installed. */
src->hasBreak = (!src->isExecPoint
&& breakpoint_here_p (pc) != no_breakpoint_here);
xfree (lines[i].addr_string);
xfree (lines[i].insn);
}
disassemWin->generic.contentSize = i;
return TUI_SUCCESS;
}
/*
** tuiShowDisassem().
** Function to display the disassembly window with disassembled code.
*/
void
tuiShowDisassem (CORE_ADDR startAddr)
{
struct symtab *s = find_pc_symtab (startAddr);
TuiWinInfoPtr winWithFocus = tuiWinWithFocus ();
TuiLineOrAddress val;
val.addr = startAddr;
tuiAddWinToLayout (DISASSEM_WIN);
tuiUpdateSourceWindow (disassemWin, s, val, FALSE);
/*
** if the focus was in the src win, put it in the asm win, if the
** source view isn't split
*/
if (currentLayout () != SRC_DISASSEM_COMMAND && winWithFocus == srcWin)
tuiSetWinFocusTo (disassemWin);
return;
} /* tuiShowDisassem */
/*
** tuiShowDisassemAndUpdateSource().
** Function to display the disassembly window.
*/
void
tuiShowDisassemAndUpdateSource (CORE_ADDR startAddr)
{
struct symtab_and_line sal;
tuiShowDisassem (startAddr);
if (currentLayout () == SRC_DISASSEM_COMMAND)
{
TuiLineOrAddress val;
/*
** Update what is in the source window if it is displayed too,
** note that it follows what is in the disassembly window and visa-versa
*/
sal = find_pc_line (startAddr, 0);
val.lineNo = sal.line;
tuiUpdateSourceWindow (srcWin, sal.symtab, val, TRUE);
if (sal.symtab)
{
set_current_source_symtab_and_line (&sal);
tuiUpdateLocatorFilename (sal.symtab->filename);
}
else
tuiUpdateLocatorFilename ("?");
}
return;
} /* tuiShowDisassemAndUpdateSource */
/*
** tuiGetBeginAsmAddress().
*/
CORE_ADDR
tuiGetBeginAsmAddress (void)
{
TuiGenWinInfoPtr locator;
TuiLocatorElementPtr element;
CORE_ADDR addr;
locator = locatorWinInfoPtr ();
element = &((TuiWinElementPtr) locator->content[0])->whichElement.locator;
if (element->addr == 0)
{
struct minimal_symbol *main_symbol;
/* Find address of the start of program.
Note: this should be language specific. */
main_symbol = lookup_minimal_symbol ("main", NULL, NULL);
if (main_symbol == 0)
main_symbol = lookup_minimal_symbol ("MAIN", NULL, NULL);
if (main_symbol == 0)
main_symbol = lookup_minimal_symbol ("_start", NULL, NULL);
if (main_symbol)
addr = SYMBOL_VALUE_ADDRESS (main_symbol);
else
addr = 0;
}
else /* the target is executing */
addr = element->addr;
return addr;
} /* tuiGetBeginAsmAddress */
/* Determine what the low address will be to display in the TUI's
disassembly window. This may or may not be the same as the
low address input. */
CORE_ADDR
tuiGetLowDisassemblyAddress (CORE_ADDR low, CORE_ADDR pc)
{
int pos;
/* Determine where to start the disassembly so that the pc is about in the
middle of the viewport. */
pos = tuiDefaultWinViewportHeight (DISASSEM_WIN, DISASSEM_COMMAND) / 2;
pc = tui_find_disassembly_address (pc, -pos);
if (pc < low)
pc = low;
return pc;
}
/*
** tuiVerticalDisassemScroll().
** Scroll the disassembly forward or backward vertically
*/
void
tuiVerticalDisassemScroll (TuiScrollDirection scrollDirection,
int numToScroll)
{
if (disassemWin->generic.content != (OpaquePtr) NULL)
{
CORE_ADDR pc;
TuiWinContent content;
struct symtab *s;
TuiLineOrAddress val;
int maxLines, dir;
struct symtab_and_line cursal = get_current_source_symtab_and_line ();
content = (TuiWinContent) disassemWin->generic.content;
if (cursal.symtab == (struct symtab *) NULL)
s = find_pc_symtab (get_frame_pc (deprecated_selected_frame));
else
s = cursal.symtab;
/* account for hilite */
maxLines = disassemWin->generic.height - 2;
pc = content[0]->whichElement.source.lineOrAddr.addr;
dir = (scrollDirection == FORWARD_SCROLL) ? maxLines : - maxLines;
val.addr = tui_find_disassembly_address (pc, dir);
tuiUpdateSourceWindowAsIs (disassemWin, s, val, FALSE);
}
}
Reference in New Issue View Git Blame Copy Permalink