/* Low level Unix child interface to ptrace, for GDB when running under Unix.
- Copyright (C) 1988, 1989, 1990, 1991 Free Software Foundation, Inc.
+ Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
This file is part of GDB.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-#include <stdio.h>
#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "target.h"
+#include "gdb_string.h"
#ifdef USG
#include <sys/types.h>
#include <sys/dir.h>
#include <signal.h>
#include <sys/ioctl.h>
-#ifndef USG
+
+#ifndef NO_PTRACE_H
+#ifdef PTRACE_IN_WRONG_PLACE
+#include <ptrace.h>
+#else
#include <sys/ptrace.h>
#endif
+#endif /* NO_PTRACE_H */
+#if !defined (PT_READ_I)
+#define PT_READ_I 1 /* Read word from text space */
+#endif
+#if !defined (PT_READ_D)
+#define PT_READ_D 2 /* Read word from data space */
+#endif
+#if !defined (PT_READ_U)
+#define PT_READ_U 3 /* Read word from kernel user struct */
+#endif
+#if !defined (PT_WRITE_I)
+#define PT_WRITE_I 4 /* Write word to text space */
+#endif
+#if !defined (PT_WRITE_D)
+#define PT_WRITE_D 5 /* Write word to data space */
+#endif
+#if !defined (PT_WRITE_U)
+#define PT_WRITE_U 6 /* Write word to kernel user struct */
+#endif
+#if !defined (PT_CONTINUE)
+#define PT_CONTINUE 7 /* Continue after signal */
+#endif
+#if !defined (PT_STEP)
+#define PT_STEP 9 /* Set flag for single stepping */
+#endif
#if !defined (PT_KILL)
-#define PT_KILL 8
-#define PT_STEP 9
-#define PT_CONTINUE 7
-#define PT_READ_U 3
-#define PT_WRITE_U 6
-#define PT_READ_I 1
-#define PT_READ_D 2
-#define PT_WRITE_I 4
-#define PT_WRITE_D 5
-#endif /* No PT_KILL. */
+#define PT_KILL 8 /* Send child a SIGKILL signal */
+#endif
#ifndef PT_ATTACH
#define PT_ATTACH PTRACE_ATTACH
#endif
#include "gdbcore.h"
+#ifndef NO_SYS_FILE
#include <sys/file.h>
-#include <sys/stat.h>
+#endif
+#if 0
+/* Don't think this is used anymore. On the sequent (not sure whether it's
+ dynix or ptx or both), it is included unconditionally by sys/user.h and
+ not protected against multiple inclusion. */
+#include "gdb_stat.h"
+#endif
#if !defined (FETCH_INFERIOR_REGISTERS)
#include <sys/user.h> /* Probably need to poke the user structure */
#include <a.out.h> /* For struct nlist */
#endif /* KERNEL_U_ADDR_BSD. */
#endif /* !FETCH_INFERIOR_REGISTERS */
+
\f
/* This function simply calls ptrace with the given arguments.
It exists so that all calls to ptrace are isolated in this
machine-dependent file. */
int
call_ptrace (request, pid, addr, data)
- int request, pid, *addr, data;
+ int request, pid;
+ PTRACE_ARG3_TYPE addr;
+ int data;
{
- return ptrace (request, pid, addr, data);
+ return ptrace (request, pid, addr, data
+#if defined (FIVE_ARG_PTRACE)
+ /* Deal with HPUX 8.0 braindamage. We never use the
+ calls which require the fifth argument. */
+ , 0
+#endif
+ );
}
-#ifdef DEBUG_PTRACE
+#if defined (DEBUG_PTRACE) || defined (FIVE_ARG_PTRACE)
/* For the rest of the file, use an extra level of indirection */
/* This lets us breakpoint usefully on call_ptrace. */
#define ptrace call_ptrace
#endif
-/* This is used when GDB is exiting. It gives less chance of error.*/
-
void
-kill_inferior_fast ()
+kill_inferior ()
{
if (inferior_pid == 0)
return;
- ptrace (PT_KILL, inferior_pid, 0, 0);
+ /* ptrace PT_KILL only works if process is stopped!!! So stop it with
+ a real signal first, if we can. FIXME: This is bogus. When the inferior
+ is not stopped, GDB should just be waiting for it. Either the following
+ line is unecessary, or there is some problem elsewhere in GDB which
+ causes us to get here when the inferior is not stopped. */
+ kill (inferior_pid, SIGKILL);
+ ptrace (PT_KILL, inferior_pid, (PTRACE_ARG3_TYPE) 0, 0);
wait ((int *)0);
-}
-
-void
-kill_inferior (args, from_tty)
- char *args;
- int from_tty;
-{
- kill_inferior_fast ();
target_mourn_inferior ();
}
+#ifndef CHILD_RESUME
+
/* Resume execution of the inferior process.
If STEP is nonzero, single-step it.
If SIGNAL is nonzero, give it that signal. */
void
-child_resume (step, signal)
+child_resume (pid, step, signal)
+ int pid;
int step;
- int signal;
+ enum target_signal signal;
{
errno = 0;
- /* An address of (int *)1 tells ptrace to continue from where it was.
- (If GDB wanted it to start some other way, we have already written
- a new PC value to the child.) */
+ if (pid == -1)
+ /* Resume all threads. */
+ /* I think this only gets used in the non-threaded case, where "resume
+ all threads" and "resume inferior_pid" are the same. */
+ pid = inferior_pid;
+
+ /* An address of (PTRACE_ARG3_TYPE)1 tells ptrace to continue from where
+ it was. (If GDB wanted it to start some other way, we have already
+ written a new PC value to the child.)
+
+ If this system does not support PT_STEP, a higher level function will
+ have called single_step() to transmute the step request into a
+ continue request (by setting breakpoints on all possible successor
+ instructions), so we don't have to worry about that here. */
if (step)
- ptrace (PT_STEP, inferior_pid, (int *)1, signal);
+ ptrace (PT_STEP, pid, (PTRACE_ARG3_TYPE) 1,
+ target_signal_to_host (signal));
else
- ptrace (PT_CONTINUE, inferior_pid, (int *)1, signal);
+ ptrace (PT_CONTINUE, pid, (PTRACE_ARG3_TYPE) 1,
+ target_signal_to_host (signal));
if (errno)
perror_with_name ("ptrace");
}
+#endif /* CHILD_RESUME */
+
\f
#ifdef ATTACH_DETACH
-/* Nonzero if we are debugging an attached process rather than
- an inferior. */
-extern int attach_flag;
-
/* Start debugging the process whose number is PID. */
int
attach (pid)
int pid;
{
errno = 0;
- ptrace (PT_ATTACH, pid, 0, 0);
+ ptrace (PT_ATTACH, pid, (PTRACE_ARG3_TYPE) 0, 0);
if (errno)
perror_with_name ("ptrace");
attach_flag = 1;
int signal;
{
errno = 0;
- ptrace (PT_DETACH, inferior_pid, 1, signal);
+ ptrace (PT_DETACH, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal);
if (errno)
perror_with_name ("ptrace");
attach_flag = 0;
}
#endif /* ATTACH_DETACH */
\f
-#if !defined (FETCH_INFERIOR_REGISTERS)
+/* Default the type of the ptrace transfer to int. */
+#ifndef PTRACE_XFER_TYPE
+#define PTRACE_XFER_TYPE int
+#endif
/* KERNEL_U_ADDR is the amount to subtract from u.u_ar0
to get the offset in the core file of the register values. */
-#if defined (KERNEL_U_ADDR_BSD)
+#if defined (KERNEL_U_ADDR_BSD) && !defined (FETCH_INFERIOR_REGISTERS)
/* Get kernel_u_addr using BSD-style nlist(). */
CORE_ADDR kernel_u_addr;
-#include <a.out.h> /* For struct nlist */
+#endif /* KERNEL_U_ADDR_BSD. */
void
_initialize_kernel_u_addr ()
{
+#if defined (KERNEL_U_ADDR_BSD) && !defined (FETCH_INFERIOR_REGISTERS)
struct nlist names[2];
names[0].n_un.n_name = "_u";
kernel_u_addr = names[0].n_value;
else
fatal ("Unable to get kernel u area address.");
-}
#endif /* KERNEL_U_ADDR_BSD. */
-
-#if defined (KERNEL_U_ADDR_HPUX)
-/* Get kernel_u_addr using HPUX-style nlist(). */
-CORE_ADDR kernel_u_addr;
-
-struct hpnlist {
- char * n_name;
- long n_value;
- unsigned char n_type;
- unsigned char n_length;
- short n_almod;
- short n_unused;
-};
-static struct hpnlist nl[] = {{ "_u", -1, }, { (char *) 0, }};
-
-/* read the value of the u area from the hp-ux kernel */
-void _initialize_kernel_u_addr ()
-{
- nlist ("/hp-ux", &nl);
- kernel_u_addr = nl[0].n_value;
}
-#endif /* KERNEL_U_ADDR_HPUX. */
+
+#if !defined (FETCH_INFERIOR_REGISTERS)
#if !defined (offsetof)
#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
#if !defined (U_REGS_OFFSET)
#define U_REGS_OFFSET \
ptrace (PT_READ_U, inferior_pid, \
- (int *)(offsetof (struct user, u_ar0)), 0) - KERNEL_U_ADDR
+ (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \
+ - KERNEL_U_ADDR
#endif
/* Registers we shouldn't try to fetch. */
fetch_register (regno)
int regno;
{
- register unsigned int regaddr;
+ /* This isn't really an address. But ptrace thinks of it as one. */
+ CORE_ADDR regaddr;
char buf[MAX_REGISTER_RAW_SIZE];
char mess[128]; /* For messages */
register int i;
if (CANNOT_FETCH_REGISTER (regno))
{
- bzero (buf, REGISTER_RAW_SIZE (regno)); /* Supply zeroes */
+ memset (buf, '\0', REGISTER_RAW_SIZE (regno)); /* Supply zeroes */
supply_register (regno, buf);
return;
}
offset = U_REGS_OFFSET;
regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
{
errno = 0;
- *(int *) &buf[i] = ptrace (PT_READ_U, inferior_pid, (int *)regaddr, 0);
- regaddr += sizeof (int);
+ *(PTRACE_XFER_TYPE *) &buf[i] = ptrace (PT_READ_U, inferior_pid,
+ (PTRACE_ARG3_TYPE) regaddr, 0);
+ regaddr += sizeof (PTRACE_XFER_TYPE);
if (errno != 0)
{
sprintf (mess, "reading register %s (#%d)", reg_names[regno], regno);
fetch_inferior_registers (regno)
int regno;
{
+ int numregs;
+
if (regno == -1)
- for (regno = 0; regno < NUM_REGS; regno++)
- fetch_register (regno);
+ {
+ numregs = ARCH_NUM_REGS;
+ for (regno = 0; regno < numregs; regno++)
+ fetch_register (regno);
+ }
else
fetch_register (regno);
}
If REGNO is -1, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
-int
+void
store_inferior_registers (regno)
int regno;
{
- register unsigned int regaddr;
+ /* This isn't really an address. But ptrace thinks of it as one. */
+ CORE_ADDR regaddr;
char buf[80];
- extern char registers[];
- register int i;
- int result = 0;
+ register int i, numregs;
unsigned int offset = U_REGS_OFFSET;
if (regno >= 0)
{
regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(PTRACE_XFER_TYPE))
{
errno = 0;
- ptrace (PT_WRITE_U, inferior_pid, (int *)regaddr,
- *(int *) ®isters[REGISTER_BYTE (regno) + i]);
+ ptrace (PT_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+ *(PTRACE_XFER_TYPE *) ®isters[REGISTER_BYTE (regno) + i]);
if (errno != 0)
{
sprintf (buf, "writing register number %d(%d)", regno, i);
perror_with_name (buf);
- result = -1;
}
- regaddr += sizeof(int);
+ regaddr += sizeof(PTRACE_XFER_TYPE);
}
}
else
{
- for (regno = 0; regno < NUM_REGS; regno++)
+ numregs = ARCH_NUM_REGS;
+ for (regno = 0; regno < numregs; regno++)
{
if (CANNOT_STORE_REGISTER (regno))
continue;
regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(PTRACE_XFER_TYPE))
{
errno = 0;
- ptrace (PT_WRITE_U, inferior_pid, (int *)regaddr,
- *(int *) ®isters[REGISTER_BYTE (regno) + i]);
+ ptrace (PT_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+ *(PTRACE_XFER_TYPE *) ®isters[REGISTER_BYTE (regno) + i]);
if (errno != 0)
{
sprintf (buf, "writing register number %d(%d)", regno, i);
perror_with_name (buf);
- result = -1;
}
- regaddr += sizeof(int);
+ regaddr += sizeof(PTRACE_XFER_TYPE);
}
}
}
- return result;
}
#endif /* !defined (FETCH_INFERIOR_REGISTERS). */
\f
+
+#if !defined (CHILD_XFER_MEMORY)
/* 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
char *myaddr;
int len;
int write;
- struct target_ops target; /* ignored */
+ struct target_ops *target; /* ignored */
{
register int i;
/* Round starting address down to longword boundary. */
- register CORE_ADDR addr = memaddr & - sizeof (int);
+ register CORE_ADDR addr = memaddr & - sizeof (PTRACE_XFER_TYPE);
/* Round ending address up; get number of longwords that makes. */
register int count
- = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
+ = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1)
+ / sizeof (PTRACE_XFER_TYPE);
/* Allocate buffer of that many longwords. */
- register int *buffer = (int *) alloca (count * sizeof (int));
+ register PTRACE_XFER_TYPE *buffer
+ = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE));
if (write)
{
/* Fill start and end extra bytes of buffer with existing memory data. */
- if (addr != memaddr || len < (int)sizeof (int)) {
+ if (addr != memaddr || len < (int) sizeof (PTRACE_XFER_TYPE)) {
/* Need part of initial word -- fetch it. */
- buffer[0] = ptrace (PT_READ_I, inferior_pid, (int *)addr, 0);
+ buffer[0] = ptrace (PT_READ_I, inferior_pid, (PTRACE_ARG3_TYPE) addr,
+ 0);
}
if (count > 1) /* FIXME, avoid if even boundary */
{
buffer[count - 1]
= ptrace (PT_READ_I, inferior_pid,
- (int *)(addr + (count - 1) * sizeof (int)), 0);
+ ((PTRACE_ARG3_TYPE)
+ (addr + (count - 1) * sizeof (PTRACE_XFER_TYPE))),
+ 0);
}
/* Copy data to be written over corresponding part of buffer */
- bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
+ memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)),
+ myaddr,
+ len);
/* Write the entire buffer. */
- for (i = 0; i < count; i++, addr += sizeof (int))
+ for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
{
errno = 0;
- ptrace (PT_WRITE_D, inferior_pid, (int *)addr, buffer[i]);
+ ptrace (PT_WRITE_D, inferior_pid, (PTRACE_ARG3_TYPE) addr,
+ buffer[i]);
if (errno)
{
/* Using the appropriate one (I or D) is necessary for
Gould NP1, at least. */
errno = 0;
- ptrace (PT_WRITE_I, inferior_pid, (int *)addr, buffer[i]);
+ ptrace (PT_WRITE_I, inferior_pid, (PTRACE_ARG3_TYPE) addr,
+ buffer[i]);
}
if (errno)
return 0;
else
{
/* Read all the longwords */
- for (i = 0; i < count; i++, addr += sizeof (int))
+ for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
{
errno = 0;
- buffer[i] = ptrace (PT_READ_I, inferior_pid, (int *)addr, 0);
+ buffer[i] = ptrace (PT_READ_I, inferior_pid,
+ (PTRACE_ARG3_TYPE) addr, 0);
if (errno)
return 0;
QUIT;
}
/* Copy appropriate bytes out of the buffer. */
- bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
+ memcpy (myaddr,
+ (char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)),
+ len);
}
return len;
}
+
+\f
+static void
+udot_info ()
+{
+ int udot_off; /* Offset into user struct */
+ int udot_val; /* Value from user struct at udot_off */
+ char mess[128]; /* For messages */
+
+ if (!target_has_execution)
+ {
+ error ("The program is not being run.");
+ }
+
+#if !defined (KERNEL_U_SIZE)
+
+ /* Adding support for this command is easy. Typically you just add a
+ routine, called "kernel_u_size" that returns the size of the user
+ struct, to the appropriate *-nat.c file and then add to the native
+ config file "#define KERNEL_U_SIZE kernel_u_size()" */
+ error ("Don't know how large ``struct user'' is in this version of gdb.");
+
+#else
+
+ for (udot_off = 0; udot_off < KERNEL_U_SIZE; udot_off += sizeof (udot_val))
+ {
+ if ((udot_off % 24) == 0)
+ {
+ if (udot_off > 0)
+ {
+ printf_filtered ("\n");
+ }
+ printf_filtered ("%04x:", udot_off);
+ }
+ udot_val = ptrace (PT_READ_U, inferior_pid, (PTRACE_ARG3_TYPE) udot_off, 0);
+ if (errno != 0)
+ {
+ sprintf (mess, "\nreading user struct at offset 0x%x", udot_off);
+ perror_with_name (mess);
+ }
+ /* Avoid using nonportable (?) "*" in print specs */
+ printf_filtered (sizeof (int) == 4 ? " 0x%08x" : " 0x%16x", udot_val);
+ }
+ printf_filtered ("\n");
+
+#endif
+}
+\f
+void
+_initialize_infptrace ()
+{
+ add_info ("udot", udot_info,
+ "Print contents of kernel ``struct user'' for current child.");
+
+}
+#endif /* !defined (CHILD_XFER_MEMORY). */
projects / binutils.git / blobdiff