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gdb-2.4+.aux.coff
This commit is contained in:
gdb-2.4+.aux.coff
661
gdb/inflow.c
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661
gdb/inflow.c
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@ -0,0 +1,661 @@
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||||
/* Low level interface to ptrace, for GDB when running under Unix.
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||||
Copyright (C) 1986, 1987 Free Software Foundation, Inc.
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||||
|
||||
GDB is distributed in the hope that it will be useful, but WITHOUT ANY
|
||||
WARRANTY. No author or distributor accepts responsibility to anyone
|
||||
for the consequences of using it or for whether it serves any
|
||||
particular purpose or works at all, unless he says so in writing.
|
||||
Refer to the GDB General Public License for full details.
|
||||
|
||||
Everyone is granted permission to copy, modify and redistribute GDB,
|
||||
but only under the conditions described in the GDB General Public
|
||||
License. A copy of this license is supposed to have been given to you
|
||||
along with GDB so you can know your rights and responsibilities. It
|
||||
should be in a file named COPYING. Among other things, the copyright
|
||||
notice and this notice must be preserved on all copies.
|
||||
|
||||
In other words, go ahead and share GDB, but don't try to stop
|
||||
anyone else from sharing it farther. Help stamp out software hoarding!
|
||||
*/
|
||||
|
||||
#include "defs.h"
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#include "initialize.h"
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#include "param.h"
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#include "frame.h"
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||||
#include "inferior.h"
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||||
#include <stdio.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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#include <sgtty.h>
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#include <fcntl.h>
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||||
#ifdef mac_aux
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#include <sys/seg.h>
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#include <sys/mmu.h>
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||||
#include <sys/signal.h>
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#include <sys/time.h>
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#include <sys/user.h>
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#else
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||||
#include <sys/user.h>
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#endif /* mac_aux */
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||||
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||||
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||||
#ifdef UMAX_PTRACE
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||||
#include <a.out.h>
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||||
#endif
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||||
|
||||
#ifdef NEW_SUN_PTRACE
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||||
#include <sys/ptrace.h>
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||||
#include <machine/reg.h>
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#endif
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||||
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||||
#ifdef SYSV_TTYS
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#include <termio.h>
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#endif
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||||
|
||||
extern int errno;
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||||
|
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/* Nonzero if we are debugging an attached outside process
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rather than an inferior. */
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static int attach_flag;
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#define UPAGE_MASK 0x00003FFF
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START_FILE
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/* Record terminal status separately for debugger and inferior. */
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#ifdef SYSV_TTYS
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static struct termio ti_inferior;
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#else
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static struct sgttyb sg_inferior;
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static struct tchars tc_inferior;
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static struct ltchars ltc_inferior;
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static int lmode_inferior;
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#endif
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static int tflags_inferior;
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static int pgrp_inferior;
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#ifdef SYSV_TTYS
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static struct termio ti_ours;
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#else
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static struct sgttyb sg_ours;
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static struct tchars tc_ours;
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static struct ltchars ltc_ours;
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static int lmode_ours;
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#endif
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static int tflags_ours;
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static int pgrp_ours;
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/* Copy of inferior_io_terminal when inferior was last started. */
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static char *inferior_thisrun_terminal;
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static void terminal_ours_1 ();
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/* Nonzero if our terminal settings are in effect.
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Zero if the inferior's settings are in effect. */
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static int terminal_is_ours;
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/* Initialize the terminal settings we record for the inferior,
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before we actually run the inferior. */
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void
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||||
terminal_init_inferior ()
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||||
{
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#ifdef SYSV_TTYS
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ti_inferior = ti_ours;
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||||
#else
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||||
sg_inferior = sg_ours;
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||||
tc_inferior = tc_ours;
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ltc_inferior = ltc_ours;
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lmode_inferior = lmode_ours;
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#endif
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tflags_inferior = tflags_ours;
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pgrp_inferior = inferior_pid;
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terminal_is_ours = 1;
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}
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||||
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/* Put the inferior's terminal settings into effect.
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||||
This is preparation for starting or resuming the inferior. */
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||||
void
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||||
terminal_inferior ()
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||||
{
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||||
if (terminal_is_ours) /* && inferior_thisrun_terminal == 0) */
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{
|
||||
fcntl (0, F_SETFL, tflags_inferior);
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fcntl (0, F_SETFL, tflags_inferior);
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#ifdef SYSV_TTYS
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ioctl (0, TCSETA, &ti_inferior);
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#else
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ioctl (0, TIOCSETN, &sg_inferior);
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ioctl (0, TIOCSETC, &tc_inferior);
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ioctl (0, TIOCSLTC, <c_inferior);
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ioctl (0, TIOCLSET, &lmode_inferior);
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||||
#endif
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ioctl (0, TIOCSPGRP, &pgrp_inferior);
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||||
}
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terminal_is_ours = 0;
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}
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/* Put some of our terminal settings into effect,
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enough to get proper results from our output,
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||||
but do not change into or out of RAW mode
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so that no input is discarded.
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|
||||
After doing this, either terminal_ours or terminal_inferior
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||||
should be called to get back to a normal state of affairs. */
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||||
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||||
void
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||||
terminal_ours_for_output ()
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||||
{
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||||
terminal_ours_1 (1);
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}
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||||
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||||
/* Put our terminal settings into effect.
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||||
First record the inferior's terminal settings
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so they can be restored properly later. */
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void
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terminal_ours ()
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{
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terminal_ours_1 (0);
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}
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static void
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terminal_ours_1 (output_only)
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int output_only;
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||||
{
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||||
/* Ignore this signal since it will happen when we try to set the pgrp. */
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||||
int (*osigttou) ();
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||||
if (!terminal_is_ours) /* && inferior_thisrun_terminal == 0) */
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||||
{
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||||
terminal_is_ours = 1;
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||||
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||||
osigttou = signal (SIGTTOU, SIG_IGN);
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||||
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||||
ioctl (0, TIOCGPGRP, &pgrp_inferior);
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ioctl (0, TIOCSPGRP, &pgrp_ours);
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||||
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signal (SIGTTOU, osigttou);
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||||
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||||
tflags_inferior = fcntl (0, F_GETFL, 0);
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||||
#ifdef SYSV_TTYS
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||||
ioctl (0, TCGETA, &ti_inferior);
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||||
#else
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ioctl (0, TIOCGETP, &sg_inferior);
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ioctl (0, TIOCGETC, &tc_inferior);
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ioctl (0, TIOCGLTC, <c_inferior);
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ioctl (0, TIOCLGET, &lmode_inferior);
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#endif
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||||
}
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fcntl (0, F_SETFL, tflags_ours);
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fcntl (0, F_SETFL, tflags_ours);
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||||
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||||
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||||
#ifdef SYSV_TTYS
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||||
ti_ours.c_lflag |= ICANON | ISIG;
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||||
if (output_only)
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ti_ours.c_lflag &= ~((ICANON|ISIG)&ti_inferior.c_lflag);
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||||
ioctl (0, TCSETA, &ti_ours);
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||||
ti_ours.c_lflag |= ICANON | ISIG;
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||||
#else
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||||
sg_ours.sg_flags &= ~RAW & ~CBREAK;
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||||
if (output_only)
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||||
sg_ours.sg_flags |= (RAW | CBREAK) & sg_inferior.sg_flags;
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ioctl (0, TIOCSETN, &sg_ours);
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ioctl (0, TIOCSETC, &tc_ours);
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||||
ioctl (0, TIOCSLTC, <c_ours);
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||||
ioctl (0, TIOCLSET, &lmode_ours);
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||||
sg_ours.sg_flags &= ~RAW & ~CBREAK;
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||||
#endif
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||||
}
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||||
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||||
static void
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||||
term_status_command ()
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||||
{
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||||
register int i;
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||||
printf ("Inferior's terminal status (currently saved by GDB):\n");
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||||
#ifdef SYSV_TTYS
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||||
printf ("fcntl flags = 0x%x, owner pid = %d.\n",
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||||
tflags_inferior, pgrp_inferior);
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||||
printf ("iflag = 0x%04x, oflag = 0x%04x, cflag = 0x%04x, lflag = 0x%04x\n",
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||||
ti_inferior.c_iflag, ti_inferior.c_oflag,
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ti_inferior.c_cflag, ti_inferior.c_lflag);
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||||
printf ("line discipline = %d\n", ti_inferior.c_line);
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||||
printf ("control chars: ");
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for (i = 0; i < NCC; i++)
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printf ("0x%x ", ti_inferior.c_cc[i]);
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||||
printf ("\n");
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#else
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||||
printf ("fcntl flags = 0x%x, lmode = 0x%x,\nsgttyb.sg_flags = 0x%x, owner pid = %d.\n",
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||||
tflags_inferior, lmode_inferior,
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sg_inferior.sg_flags, pgrp_inferior);
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||||
printf ("tchars: ");
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||||
for (i = 0; i < sizeof (struct tchars); i++)
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||||
printf ("0x%x ", ((char *)&tc_inferior)[i]);
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||||
printf ("\n");
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||||
printf ("ltchars: ");
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for (i = 0; i < sizeof (struct ltchars); i++)
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printf ("0x%x ", ((char *)<c_inferior)[i]);
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printf ("\n");
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#endif
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||||
}
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||||
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||||
static void
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||||
new_tty (ttyname)
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||||
char *ttyname;
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||||
{
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||||
register int tty;
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||||
register int fd;
|
||||
|
||||
#if 0
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||||
/* I think it is better not to do this. Then C-z on the GDB terminal
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||||
will still stop the program, while C-z on the data terminal
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||||
will be input. */
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||||
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||||
/* Disconnect the child process from our controlling terminal. */
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||||
tty = open("/dev/tty", O_RDWR);
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||||
if (tty > 0)
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||||
{
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||||
ioctl(tty, TIOCNOTTY, 0);
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close(tty);
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||||
}
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||||
#endif
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||||
/* Now open the specified new terminal. */
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||||
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tty = open(ttyname, O_RDWR);
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||||
if (tty == -1)
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||||
_exit(1);
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||||
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||||
dup2(tty, 0);
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||||
dup2(tty, 1);
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||||
dup2(tty, 2);
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||||
close(tty);
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||||
}
|
||||
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||||
/* Start an inferior process and returns its pid.
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||||
ALLARGS is a vector of program-name and args.
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||||
ENV is the environment vector to pass. */
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||||
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||||
int
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||||
create_inferior (allargs, env)
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||||
char **allargs;
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||||
char **env;
|
||||
{
|
||||
int pid;
|
||||
extern int sys_nerr;
|
||||
extern char *sys_errlist[];
|
||||
extern int errno;
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||||
|
||||
/* exec is said to fail if the executable is open. */
|
||||
close_exec_file ();
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||||
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||||
pid = vfork ();
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||||
if (pid < 0)
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||||
perror_with_name ("vfork");
|
||||
|
||||
if (pid == 0)
|
||||
{
|
||||
/* Run inferior in a separate process group. */
|
||||
setpgrp (getpid (), getpid ());
|
||||
|
||||
inferior_thisrun_terminal = inferior_io_terminal;
|
||||
if (inferior_io_terminal != 0)
|
||||
new_tty (inferior_io_terminal);
|
||||
|
||||
/* Not needed on Sun, at least, and loses there
|
||||
because it clobbers the superior. */
|
||||
/*??? signal (SIGQUIT, SIG_DFL);
|
||||
signal (SIGINT, SIG_DFL); */
|
||||
|
||||
ptrace (0);
|
||||
execle ("/bin/sh", "sh", "-c", allargs, 0, env);
|
||||
|
||||
fprintf (stderr, "Cannot exec /bin/sh: %s.\n",
|
||||
errno < sys_nerr ? sys_errlist[errno] : "unknown error");
|
||||
fflush (stderr);
|
||||
_exit (0177);
|
||||
}
|
||||
return pid;
|
||||
}
|
||||
|
||||
/* Kill the inferior process. Make us have no inferior. */
|
||||
|
||||
static void
|
||||
kill_command ()
|
||||
{
|
||||
if (inferior_pid == 0)
|
||||
error ("The program is not being run.");
|
||||
if (!query ("Kill the inferior process? "))
|
||||
error ("Not confirmed.");
|
||||
kill_inferior ();
|
||||
}
|
||||
|
||||
kill_inferior ()
|
||||
{
|
||||
if (inferior_pid == 0)
|
||||
return;
|
||||
ptrace (8, inferior_pid, 0, 0);
|
||||
wait (0);
|
||||
inferior_died ();
|
||||
}
|
||||
|
||||
inferior_died ()
|
||||
{
|
||||
inferior_pid = 0;
|
||||
attach_flag = 0;
|
||||
mark_breakpoints_out ();
|
||||
reopen_exec_file ();
|
||||
if (have_core_file_p ())
|
||||
set_current_frame (read_register (FP_REGNUM));
|
||||
}
|
||||
|
||||
/* Resume execution of the inferior process.
|
||||
If STEP is nonzero, single-step it.
|
||||
If SIGNAL is nonzero, give it that signal. */
|
||||
|
||||
void
|
||||
resume (step, signal)
|
||||
int step;
|
||||
int signal;
|
||||
{
|
||||
errno = 0;
|
||||
ptrace (step ? 9 : 7, inferior_pid, 1, signal);
|
||||
if (errno)
|
||||
perror_with_name ("ptrace");
|
||||
}
|
||||
|
||||
#ifdef NEW_SUN_PTRACE
|
||||
|
||||
/* Start debugging the process whose number is PID. */
|
||||
|
||||
attach (pid)
|
||||
int pid;
|
||||
{
|
||||
errno = 0;
|
||||
ptrace (PTRACE_ATTACH, pid, 0, 0);
|
||||
if (errno)
|
||||
perror_with_name ("ptrace");
|
||||
attach_flag = 1;
|
||||
return pid;
|
||||
}
|
||||
|
||||
/* Stop debugging the process whose number is PID
|
||||
and continue it with signal number SIGNAL.
|
||||
SIGNAL = 0 means just continue it. */
|
||||
|
||||
void
|
||||
detach (signal)
|
||||
int signal;
|
||||
{
|
||||
errno = 0;
|
||||
ptrace (PTRACE_DETACH, inferior_pid, 1, signal);
|
||||
if (errno)
|
||||
perror_with_name ("ptrace");
|
||||
attach_flag = 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef NEW_SUN_PTRACE
|
||||
|
||||
void
|
||||
fetch_inferior_registers ()
|
||||
{
|
||||
struct regs inferior_registers;
|
||||
struct fp_status inferior_fp_registers;
|
||||
extern char registers[];
|
||||
|
||||
ptrace (PTRACE_GETREGS, inferior_pid, &inferior_registers);
|
||||
ptrace (PTRACE_GETFPREGS, inferior_pid, &inferior_fp_registers);
|
||||
|
||||
bcopy (&inferior_registers, registers, 16 * 4);
|
||||
bcopy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)],
|
||||
sizeof inferior_fp_registers.fps_regs);
|
||||
*(int *)®isters[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
|
||||
*(int *)®isters[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
|
||||
bcopy (&inferior_fp_registers.fps_control,
|
||||
®isters[REGISTER_BYTE (FPC_REGNUM)],
|
||||
sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
|
||||
}
|
||||
|
||||
/* Store our register values back into the inferior.
|
||||
If REGNO is -1, do this for all registers.
|
||||
Otherwise, REGNO specifies which register (so we can save time). */
|
||||
|
||||
store_inferior_registers (regno)
|
||||
int regno;
|
||||
{
|
||||
struct regs inferior_registers;
|
||||
struct fp_status inferior_fp_registers;
|
||||
extern char registers[];
|
||||
|
||||
bcopy (registers, &inferior_registers, 16 * 4);
|
||||
bcopy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
|
||||
sizeof inferior_fp_registers.fps_regs);
|
||||
inferior_registers.r_ps = *(int *)®isters[REGISTER_BYTE (PS_REGNUM)];
|
||||
inferior_registers.r_pc = *(int *)®isters[REGISTER_BYTE (PC_REGNUM)];
|
||||
bcopy (®isters[REGISTER_BYTE (FPC_REGNUM)],
|
||||
&inferior_fp_registers.fps_control,
|
||||
sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
|
||||
|
||||
ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers);
|
||||
ptrace (PTRACE_SETFPREGS, inferior_pid, &inferior_fp_registers);
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
void
|
||||
fetch_inferior_registers ()
|
||||
{
|
||||
register int regno;
|
||||
register unsigned int regaddr;
|
||||
char buf[MAX_REGISTER_RAW_SIZE];
|
||||
register int i;
|
||||
|
||||
#ifdef UMAX_PTRACE
|
||||
unsigned int offset = 0;
|
||||
#else
|
||||
struct user u;
|
||||
unsigned int offset = (char *) &u.u_ar0 - (char *) &u;
|
||||
offset = ptrace (3, inferior_pid, offset, 0) & UPAGE_MASK;
|
||||
#endif
|
||||
|
||||
for (regno = 0; regno < NUM_REGS; regno++)
|
||||
{
|
||||
regaddr = register_addr (regno, offset);
|
||||
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
|
||||
{
|
||||
*(int *) &buf[i] = ptrace (3, inferior_pid, regaddr, 0);
|
||||
regaddr += sizeof (int);
|
||||
}
|
||||
supply_register (regno, buf);
|
||||
}
|
||||
}
|
||||
|
||||
/* Store our register values back into the inferior.
|
||||
If REGNO is -1, do this for all registers.
|
||||
Otherwise, REGNO specifies which register (so we can save time). */
|
||||
|
||||
store_inferior_registers (regno)
|
||||
int regno;
|
||||
{
|
||||
register unsigned int regaddr;
|
||||
char buf[80];
|
||||
|
||||
#ifdef UMAX_PTRACE
|
||||
unsigned int offset = 0;
|
||||
#else
|
||||
struct user u;
|
||||
unsigned int offset = (char *) &u.u_ar0 - (char *) &u;
|
||||
offset = ptrace (3, inferior_pid, offset, 0) & UPAGE_MASK;
|
||||
#endif
|
||||
|
||||
if (regno >= 0)
|
||||
{
|
||||
regaddr = register_addr (regno, offset);
|
||||
errno = 0;
|
||||
ptrace (6, inferior_pid, regaddr, read_register (regno));
|
||||
if (errno != 0)
|
||||
{
|
||||
sprintf (buf, "writing register number %d", regno);
|
||||
perror_with_name (buf);
|
||||
}
|
||||
}
|
||||
else for (regno = 0; regno < NUM_REGS; regno++)
|
||||
{
|
||||
regaddr = register_addr (regno, offset);
|
||||
errno = 0;
|
||||
ptrace (6, inferior_pid, regaddr, read_register (regno));
|
||||
if (errno != 0)
|
||||
{
|
||||
sprintf (buf, "writing register number %d", regno);
|
||||
perror_with_name (buf);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif /* not NEW_SUN_PTRACE */
|
||||
|
||||
/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
|
||||
in the NEW_SUN_PTRACE case.
|
||||
It ought to be straightforward. But it appears that writing did
|
||||
not write the data that I specified. I cannot understand where
|
||||
it got the data that it actually did write. */
|
||||
|
||||
/* Copy LEN bytes from inferior's memory starting at MEMADDR
|
||||
to debugger memory starting at MYADDR. */
|
||||
|
||||
read_inferior_memory (memaddr, myaddr, len)
|
||||
CORE_ADDR memaddr;
|
||||
char *myaddr;
|
||||
int len;
|
||||
{
|
||||
register int i;
|
||||
/* Round starting address down to longword boundary. */
|
||||
register CORE_ADDR addr = memaddr & - sizeof (int);
|
||||
/* Round ending address up; get number of longwords that makes. */
|
||||
register int count
|
||||
= (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
|
||||
/* Allocate buffer of that many longwords. */
|
||||
register int *buffer = (int *) alloca (count * sizeof (int));
|
||||
|
||||
/* Read all the longwords */
|
||||
for (i = 0; i < count; i++, addr += sizeof (int))
|
||||
buffer[i] = ptrace (1, inferior_pid, addr, 0);
|
||||
|
||||
/* Copy appropriate bytes out of the buffer. */
|
||||
bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
|
||||
}
|
||||
|
||||
/* Copy LEN bytes of data from debugger memnory at MYADDR
|
||||
to inferior's memory at MEMADDR.
|
||||
On failure (cannot write the inferior)
|
||||
returns the value of errno. */
|
||||
|
||||
int
|
||||
write_inferior_memory (memaddr, myaddr, len)
|
||||
CORE_ADDR memaddr;
|
||||
char *myaddr;
|
||||
int len;
|
||||
{
|
||||
register int i;
|
||||
/* Round starting address down to longword boundary. */
|
||||
register CORE_ADDR addr = memaddr & - sizeof (int);
|
||||
/* Round ending address up; get number of longwords that makes. */
|
||||
register int count
|
||||
= (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
|
||||
/* Allocate buffer of that many longwords. */
|
||||
register int *buffer = (int *) alloca (count * sizeof (int));
|
||||
extern int errno;
|
||||
|
||||
/* Fill start and end extra bytes of buffer with existing memory data. */
|
||||
|
||||
buffer[0] = ptrace (1, inferior_pid, addr, 0);
|
||||
if (count > 1)
|
||||
buffer[count - 1]
|
||||
= ptrace (1, inferior_pid,
|
||||
addr + (count - 1) * sizeof (int), 0);
|
||||
|
||||
/* Copy data to be written over corresponding part of buffer */
|
||||
|
||||
bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
|
||||
|
||||
/* Write the entire buffer. */
|
||||
|
||||
for (i = 0; i < count; i++, addr += sizeof (int))
|
||||
{
|
||||
errno = 0;
|
||||
ptrace (4, inferior_pid, addr, buffer[i]);
|
||||
if (errno)
|
||||
return errno;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
try_writing_regs_command ()
|
||||
{
|
||||
register int i;
|
||||
register int value;
|
||||
extern int errno;
|
||||
|
||||
if (inferior_pid == 0)
|
||||
error ("The program is not being run.");
|
||||
|
||||
for (i = 0; ; i += 2)
|
||||
{
|
||||
QUIT;
|
||||
errno = 0;
|
||||
value = ptrace (3, inferior_pid, i, 0);
|
||||
ptrace (6, inferior_pid, i, value);
|
||||
if (errno == 0)
|
||||
{
|
||||
printf (" Succeeded with address 0x%x; value 0x%x (%d).\n",
|
||||
i, value, value);
|
||||
}
|
||||
else if ((i & 0377) == 0)
|
||||
printf (" Failed at 0x%x.\n", i);
|
||||
}
|
||||
}
|
||||
|
||||
static
|
||||
initialize ()
|
||||
{
|
||||
add_com ("term-status", class_obscure, term_status_command,
|
||||
"Print info on inferior's saved terminal status.");
|
||||
|
||||
add_com ("try-writing-regs", class_obscure, try_writing_regs_command,
|
||||
"Try writing all locations in inferior's system block.\n\
|
||||
Report which ones can be written.");
|
||||
|
||||
add_com ("kill", class_run, kill_command,
|
||||
"Kill execution of program being debugged.");
|
||||
|
||||
inferior_pid = 0;
|
||||
|
||||
#ifdef SYSV_TTYS
|
||||
ioctl (0, TCGETA, &ti_ours);
|
||||
#else
|
||||
ioctl (0, TIOCGETP, &sg_ours);
|
||||
ioctl (0, TIOCGETC, &tc_ours);
|
||||
ioctl (0, TIOCGLTC, <c_ours);
|
||||
ioctl (0, TIOCLGET, &lmode_ours);
|
||||
#endif
|
||||
fcntl (0, F_GETFL, tflags_ours);
|
||||
ioctl (0, TIOCGPGRP, &pgrp_ours);
|
||||
|
||||
terminal_is_ours = 1;
|
||||
}
|
||||
|
||||
END_FILE
|
||||
Reference in New Issue
Block a user