gdb-2.4+.aux.coff

1 files changed, 661 insertions, 0 deletions

diff --git a/gdb/inflow.c b/gdb/inflow.c
new file mode 100644
index 0000000..7bed594
--- /dev/null
+++ b/gdb/inflow.c
@@ -0,0 +1,661 @@
+/* Low level interface to ptrace, for GDB when running under Unix.
+   Copyright (C) 1986, 1987 Free Software Foundation, Inc.
+
+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"
+#include "initialize.h"
+#include "param.h"
+#include "frame.h"
+#include "inferior.h"
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <sgtty.h>
+#include <fcntl.h>
+
+#ifdef mac_aux
+#include <sys/seg.h>
+#include <sys/mmu.h>
+#include <sys/signal.h>
+#include <sys/time.h>
+#include <sys/user.h>
+#else
+#include <sys/user.h>
+#endif /* mac_aux */
+
+
+#ifdef UMAX_PTRACE
+#include <a.out.h>
+#endif
+
+#ifdef NEW_SUN_PTRACE
+#include <sys/ptrace.h>
+#include <machine/reg.h>
+#endif
+
+#ifdef SYSV_TTYS
+#include <termio.h>
+#endif
+
+extern int errno;
+
+/* Nonzero if we are debugging an attached outside process
+   rather than an inferior.  */
+
+static int attach_flag;
+
+#define	UPAGE_MASK	0x00003FFF
+
+START_FILE
+
+/* Record terminal status separately for debugger and inferior.  */
+
+#ifdef SYSV_TTYS
+static struct termio ti_inferior;
+#else
+static struct sgttyb sg_inferior;
+static struct tchars tc_inferior;
+static struct ltchars ltc_inferior;
+static int lmode_inferior;
+#endif
+static int tflags_inferior;
+static int pgrp_inferior;
+
+#ifdef SYSV_TTYS
+static struct termio ti_ours;
+#else
+static struct sgttyb sg_ours;
+static struct tchars tc_ours;
+static struct ltchars ltc_ours;
+static int lmode_ours;
+#endif
+static int tflags_ours;
+static int pgrp_ours;
+
+/* Copy of inferior_io_terminal when inferior was last started.  */
+static char *inferior_thisrun_terminal;
+
+static void terminal_ours_1 ();
+
+/* Nonzero if our terminal settings are in effect.
+   Zero if the inferior's settings are in effect.  */
+static int terminal_is_ours;
+
+/* Initialize the terminal settings we record for the inferior,
+   before we actually run the inferior.  */
+
+void
+terminal_init_inferior ()
+{
+
+#ifdef SYSV_TTYS
+  ti_inferior = ti_ours;
+#else
+  sg_inferior = sg_ours;
+  tc_inferior = tc_ours;
+  ltc_inferior = ltc_ours;
+  lmode_inferior = lmode_ours;
+#endif
+  tflags_inferior = tflags_ours;
+  pgrp_inferior = inferior_pid;
+
+  terminal_is_ours = 1;
+}
+
+/* Put the inferior's terminal settings into effect.
+   This is preparation for starting or resuming the inferior.  */
+
+void
+terminal_inferior ()
+{
+  if (terminal_is_ours)   /*  && inferior_thisrun_terminal == 0) */
+    {
+      fcntl (0, F_SETFL, tflags_inferior);
+      fcntl (0, F_SETFL, tflags_inferior);
+#ifdef SYSV_TTYS
+      ioctl (0, TCSETA, &ti_inferior);
+#else
+      ioctl (0, TIOCSETN, &sg_inferior);
+      ioctl (0, TIOCSETC, &tc_inferior);
+      ioctl (0, TIOCSLTC, &ltc_inferior);
+      ioctl (0, TIOCLSET, &lmode_inferior);
+#endif
+      ioctl (0, TIOCSPGRP, &pgrp_inferior);
+    }
+  terminal_is_ours = 0;
+}
+
+/* Put some of our terminal settings into effect,
+   enough to get proper results from our output,
+   but do not change into or out of RAW mode
+   so that no input is discarded.
+
+   After doing this, either terminal_ours or terminal_inferior
+   should be called to get back to a normal state of affairs.  */
+
+void
+terminal_ours_for_output ()
+{
+  terminal_ours_1 (1);
+}
+
+/* Put our terminal settings into effect.
+   First record the inferior's terminal settings
+   so they can be restored properly later.  */
+
+void
+terminal_ours ()
+{
+  terminal_ours_1 (0);
+}
+
+static void
+terminal_ours_1 (output_only)
+     int output_only;
+{
+  /* Ignore this signal since it will happen when we try to set the pgrp.  */
+  int (*osigttou) ();
+
+  if (!terminal_is_ours)  /*   && inferior_thisrun_terminal == 0)  */
+    {
+      terminal_is_ours = 1;
+
+      osigttou = signal (SIGTTOU, SIG_IGN);
+
+      ioctl (0, TIOCGPGRP, &pgrp_inferior);
+      ioctl (0, TIOCSPGRP, &pgrp_ours);
+
+      signal (SIGTTOU, osigttou);
+
+      tflags_inferior = fcntl (0, F_GETFL, 0);
+#ifdef SYSV_TTYS
+      ioctl (0, TCGETA, &ti_inferior);
+#else
+      ioctl (0, TIOCGETP, &sg_inferior);
+      ioctl (0, TIOCGETC, &tc_inferior);
+      ioctl (0, TIOCGLTC, &ltc_inferior);
+      ioctl (0, TIOCLGET, &lmode_inferior);
+#endif
+    }
+
+  fcntl (0, F_SETFL, tflags_ours);
+  fcntl (0, F_SETFL, tflags_ours);
+
+
+#ifdef SYSV_TTYS
+  ti_ours.c_lflag |= ICANON | ISIG;
+  if (output_only)
+    ti_ours.c_lflag &= ~((ICANON|ISIG)&ti_inferior.c_lflag);
+  ioctl (0, TCSETA, &ti_ours);
+  ti_ours.c_lflag |= ICANON | ISIG;
+#else
+  sg_ours.sg_flags &= ~RAW & ~CBREAK;
+  if (output_only)
+    sg_ours.sg_flags |= (RAW | CBREAK) & sg_inferior.sg_flags;
+  ioctl (0, TIOCSETN, &sg_ours);
+  ioctl (0, TIOCSETC, &tc_ours);
+  ioctl (0, TIOCSLTC, &ltc_ours);
+  ioctl (0, TIOCLSET, &lmode_ours);
+  sg_ours.sg_flags &= ~RAW & ~CBREAK;
+#endif
+}
+
+static void
+term_status_command ()
+{
+  register int i;
+  printf ("Inferior's terminal status (currently saved by GDB):\n");
+#ifdef SYSV_TTYS
+  printf ("fcntl flags = 0x%x, owner pid = %d.\n",
+	  tflags_inferior, pgrp_inferior);
+  printf ("iflag = 0x%04x, oflag = 0x%04x, cflag = 0x%04x, lflag = 0x%04x\n",
+	  ti_inferior.c_iflag, ti_inferior.c_oflag,
+	  ti_inferior.c_cflag, ti_inferior.c_lflag);
+  printf ("line discipline = %d\n", ti_inferior.c_line);
+  printf ("control chars: ");
+  for (i = 0; i < NCC; i++)
+    printf ("0x%x ", ti_inferior.c_cc[i]);
+  printf ("\n");
+#else
+  printf ("fcntl flags = 0x%x, lmode = 0x%x,\nsgttyb.sg_flags = 0x%x, owner pid = %d.\n",
+	  tflags_inferior, lmode_inferior,
+	  sg_inferior.sg_flags, pgrp_inferior);
+  printf ("tchars: ");
+  for (i = 0; i < sizeof (struct tchars); i++)
+    printf ("0x%x ", ((char *)&tc_inferior)[i]);
+  printf ("\n");
+  printf ("ltchars: ");
+  for (i = 0; i < sizeof (struct ltchars); i++)
+    printf ("0x%x ", ((char *)&ltc_inferior)[i]);
+  printf ("\n");
+#endif
+}
+
+static void
+new_tty (ttyname)
+     char *ttyname;
+{
+  register int tty;
+  register int fd;
+
+#if 0
+  /* I think it is better not to do this.  Then C-z on the GDB terminal
+     will still stop the program, while C-z on the data terminal
+     will be input.  */
+
+  /* Disconnect the child process from our controlling terminal.  */
+  tty = open("/dev/tty", O_RDWR);
+  if (tty > 0)
+    {
+      ioctl(tty, TIOCNOTTY, 0);
+      close(tty);
+    }
+#endif
+  /* Now open the specified new terminal.  */
+
+  tty = open(ttyname, O_RDWR);
+  if (tty == -1)
+    _exit(1);
+
+  dup2(tty, 0);
+  dup2(tty, 1);
+  dup2(tty, 2);
+  close(tty);
+}
+
+/* Start an inferior process and returns its pid.
+   ALLARGS is a vector of program-name and args.
+   ENV is the environment vector to pass.  */
+
+int
+create_inferior (allargs, env)
+     char **allargs;
+     char **env;
+{
+  int pid;
+  extern int sys_nerr;
+  extern char *sys_errlist[];
+  extern int errno;
+
+  /* exec is said to fail if the executable is open.  */
+  close_exec_file ();
+
+  pid = vfork ();
+  if (pid < 0)
+    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, &registers[REGISTER_BYTE (FP0_REGNUM)],
+	 sizeof inferior_fp_registers.fps_regs);
+  *(int *)&registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
+  *(int *)&registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
+  bcopy (&inferior_fp_registers.fps_control,
+	 &registers[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 (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
+	 sizeof inferior_fp_registers.fps_regs);
+  inferior_registers.r_ps = *(int *)&registers[REGISTER_BYTE (PS_REGNUM)];
+  inferior_registers.r_pc = *(int *)&registers[REGISTER_BYTE (PC_REGNUM)];
+  bcopy (&registers[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, &ltc_ours);
+  ioctl (0, TIOCLGET, &lmode_ours);
+#endif
+  fcntl (0, F_GETFL, tflags_ours);
+  ioctl (0, TIOCGPGRP, &pgrp_ours);
+
+  terminal_is_ours = 1;
+}
+
+END_FILE