/* Low level Unix child interface to ptrace, for GDB when running under Unix.
- Copyright 1988, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
+ Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
+ 1998, 1999, 2000, 2001, 2002, 2004
+ Free Software Foundation, Inc.
-This file is part of GDB.
+ 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 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.
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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 "command.h"
#include "frame.h"
+#include "gdbcore.h"
#include "inferior.h"
+#include "regcache.h"
#include "target.h"
-#ifdef USG
-#include <sys/types.h>
-#endif
+#include "gdb_assert.h"
+#include "gdb_wait.h"
+#include "gdb_string.h"
#include <sys/param.h>
-#include <sys/dir.h>
+#include "gdb_dirent.h"
#include <signal.h>
#include <sys/ioctl.h>
-#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_KILL)
-#define PT_KILL 8
-#endif
+#include "gdb_ptrace.h"
-#if !defined (PT_STEP)
-#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_STEP. */
-
-#ifndef PT_ATTACH
-#define PT_ATTACH PTRACE_ATTACH
-#endif
-#ifndef PT_DETACH
-#define PT_DETACH PTRACE_DETACH
-#endif
-
-#include "gdbcore.h"
-#ifndef NO_SYS_FILE
+#ifdef HAVE_SYS_FILE_H
#include <sys/file.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 <sys/stat.h>
-#endif
#if !defined (FETCH_INFERIOR_REGISTERS)
#include <sys/user.h> /* Probably need to poke the user structure */
-#if defined (KERNEL_U_ADDR_BSD)
-#include <a.out.h> /* For struct nlist */
-#endif /* KERNEL_U_ADDR_BSD. */
#endif /* !FETCH_INFERIOR_REGISTERS */
+#if !defined (CHILD_XFER_MEMORY)
+static void udot_info (char *, int);
+#endif
+
+void _initialize_infptrace (void);
\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;
- PTRACE_ARG3_TYPE addr;
- int data;
+call_ptrace (int request, int pid, PTRACE_ARG3_TYPE addr, int 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
- );
+ return ptrace (request, pid, addr, data);
}
-#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
+/* Wait for a process to finish, possibly running a target-specific
+ hook before returning. */
+
+/* NOTE: cagney: 2004-09-29: Dependant on the native configuration,
+ "hppah-nat.c" may either call this or infttrace.c's implementation
+ of ptrace_wait. See "hppahpux.mh". */
+
+int
+ptrace_wait (ptid_t ptid, int *status)
+{
+ int wstate;
+
+ wstate = wait (status);
+ return wstate;
+}
+
+#ifndef DEPRECATED_KILL_INFERIOR
+/* NOTE: cagney/2004-09-12: Instead of definining this macro, code
+ should call inf_ptrace_target to get a basic ptrace target and then
+ locally update any necessary methods. See ppcnbsd-nat.c. */
void
-kill_inferior ()
+kill_inferior (void)
{
- if (inferior_pid == 0)
+ int status;
+ int pid = PIDGET (inferior_ptid);
+
+ if (pid == 0)
return;
- /* ptrace PT_KILL only works if process is stopped!!! So stop it with
- a real signal first, if we can. */
- kill (inferior_pid, SIGKILL);
- ptrace (PT_KILL, inferior_pid, (PTRACE_ARG3_TYPE) 0, 0);
- wait ((int *)0);
+
+ /* This once used to call "kill" to kill the inferior just in case
+ the inferior was still running. As others have noted in the past
+ (kingdon) there shouldn't be any way to get here if the inferior
+ is still running -- else there's a major problem elsewere in gdb
+ and it needs to be fixed.
+
+ The kill call causes problems under hpux10, so it's been removed;
+ if this causes problems we'll deal with them as they arise. */
+ ptrace (PT_KILL, pid, (PTRACE_TYPE_ARG3) 0, 0);
+ wait (&status);
target_mourn_inferior ();
}
+#endif /* DEPRECATED_KILL_INFERIOR */
+
+#ifndef DEPRECATED_CHILD_RESUME
+/* NOTE: cagney/2004-09-12: Instead of definining this macro, code
+ should call inf_ptrace_target to get a basic ptrace target and then
+ locally update any necessary methods. See ppcnbsd-nat.c. */
/* Resume execution of the inferior process.
If STEP is nonzero, single-step it.
If SIGNAL is nonzero, give it that signal. */
void
-child_resume (pid, step, signal)
- int pid;
- int step;
- int signal;
+child_resume (ptid_t ptid, int step, enum target_signal signal)
{
- errno = 0;
+ int request = PT_CONTINUE;
+ int pid = PIDGET (ptid);
if (pid == -1)
-#ifdef PIDGET /* XXX Lynx */
- pid = PIDGET (inferior_pid);
-#else
- pid = inferior_pid;
-#endif
-
- /* 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. */
+ /* Resume all threads. */
+ /* I think this only gets used in the non-threaded case, where "resume
+ all threads" and "resume inferior_ptid" are the same. */
+ pid = PIDGET (inferior_ptid);
if (step)
- ptrace (PT_STEP, pid, (PTRACE_ARG3_TYPE) 1, signal);
- else
- ptrace (PT_CONTINUE, pid, (PTRACE_ARG3_TYPE) 1, signal);
+ {
+ /* 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. */
+
+ gdb_assert (!SOFTWARE_SINGLE_STEP_P ());
+ request = PT_STEP;
+ }
- if (errno)
- perror_with_name ("ptrace");
+ /* An address of (PTRACE_TYPE_ARG3)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. */
+
+ errno = 0;
+ ptrace (request, pid, (PTRACE_TYPE_ARG3)1, target_signal_to_host (signal));
+ if (errno != 0)
+ perror_with_name (("ptrace"));
}
+#endif /* DEPRECATED_CHILD_RESUME */
\f
-#ifdef ATTACH_DETACH
+
/* Start debugging the process whose number is PID. */
+
int
-attach (pid)
- int pid;
+attach (int pid)
{
+#ifdef PT_ATTACH
errno = 0;
- ptrace (PT_ATTACH, pid, (PTRACE_ARG3_TYPE) 0, 0);
- if (errno)
- perror_with_name ("ptrace");
+ ptrace (PT_ATTACH, pid, (PTRACE_TYPE_ARG3) 0, 0);
+ if (errno != 0)
+ perror_with_name (("ptrace"));
attach_flag = 1;
return pid;
+#else
+ error (_("This system does not support attaching to a process"));
+#endif
}
-/* Stop debugging the process whose number is PID
- and continue it with signal number SIGNAL.
- SIGNAL = 0 means just continue it. */
+/* 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;
+detach (int signal)
{
+#ifdef PT_DETACH
+ int pid = PIDGET (inferior_ptid);
+
errno = 0;
- ptrace (PT_DETACH, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal);
- if (errno)
- perror_with_name ("ptrace");
+ ptrace (PT_DETACH, pid, (PTRACE_TYPE_ARG3) 1, signal);
+ if (errno != 0)
+ perror_with_name (("ptrace"));
attach_flag = 0;
+#else
+ error (_("This system does not support detaching from a process"));
+#endif
}
-#endif /* ATTACH_DETACH */
\f
-/* 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) && !defined (FETCH_INFERIOR_REGISTERS)
-/* Get kernel_u_addr using BSD-style nlist(). */
-CORE_ADDR kernel_u_addr;
-#endif /* KERNEL_U_ADDR_BSD. */
+#ifndef FETCH_INFERIOR_REGISTERS
-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";
- names[1].n_un.n_name = NULL;
- if (nlist ("/vmunix", names) == 0)
- kernel_u_addr = names[0].n_value;
- else
- fatal ("Unable to get kernel u area address.");
-#endif /* KERNEL_U_ADDR_BSD. */
-}
-
-#if !defined (FETCH_INFERIOR_REGISTERS)
+/* U_REGS_OFFSET is the offset of the registers within the u area. */
+#ifndef U_REGS_OFFSET
-#if !defined (offsetof)
+#ifndef offsetof
#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
#endif
-/* U_REGS_OFFSET is the offset of the registers within the u area. */
-#if !defined (U_REGS_OFFSET)
#define U_REGS_OFFSET \
- ptrace (PT_READ_U, inferior_pid, \
- (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \
+ ptrace (PT_READ_U, PIDGET (inferior_ptid), \
+ (PTRACE_TYPE_ARG3) (offsetof (struct user, u_ar0)), 0) \
- KERNEL_U_ADDR
#endif
-/* Registers we shouldn't try to fetch. */
-#if !defined (CANNOT_FETCH_REGISTER)
-#define CANNOT_FETCH_REGISTER(regno) 0
-#endif
-
-/* Fetch one register. */
+/* Fetch register REGNUM from the inferior. */
static void
-fetch_register (regno)
- int regno;
+fetch_register (int regnum)
{
- register unsigned int regaddr;
- char buf[MAX_REGISTER_RAW_SIZE];
- char mess[128]; /* For messages */
- register int i;
+ CORE_ADDR addr;
+ size_t size;
+ PTRACE_TYPE_RET *buf;
+ int tid, i;
- /* Offset of registers within the u area. */
- unsigned int offset;
-
- if (CANNOT_FETCH_REGISTER (regno))
+ if (CANNOT_FETCH_REGISTER (regnum))
{
- memset (buf, '\0', REGISTER_RAW_SIZE (regno)); /* Supply zeroes */
- supply_register (regno, buf);
+ regcache_raw_supply (current_regcache, regnum, NULL);
return;
}
- offset = U_REGS_OFFSET;
+ /* GNU/Linux LWP ID's are process ID's. */
+ tid = TIDGET (inferior_ptid);
+ if (tid == 0)
+ tid = PIDGET (inferior_ptid); /* Not a threaded program. */
+
+ /* This isn't really an address. But ptrace thinks of it as one. */
+ addr = register_addr (regnum, U_REGS_OFFSET);
+ size = register_size (current_gdbarch, regnum);
+
+ gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
+ buf = alloca (size);
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
+ /* Read the register contents from the inferior a chuck at the time. */
+ for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
{
errno = 0;
- *(PTRACE_XFER_TYPE *) &buf[i] = ptrace (PT_READ_U, inferior_pid,
- (PTRACE_ARG3_TYPE) regaddr, 0);
- regaddr += sizeof (PTRACE_XFER_TYPE);
+ buf[i] = ptrace (PT_READ_U, tid, (PTRACE_TYPE_ARG3) addr, 0);
if (errno != 0)
- {
- sprintf (mess, "reading register %s (#%d)", reg_names[regno], regno);
- perror_with_name (mess);
- }
+ error (_("Couldn't read register %s (#%d): %s."), REGISTER_NAME (regnum),
+ regnum, safe_strerror (errno));
+
+ addr += sizeof (PTRACE_TYPE_RET);
}
- supply_register (regno, buf);
+ regcache_raw_supply (current_regcache, regnum, buf);
}
-
-/* Fetch all registers, or just one, from the child process. */
+/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
+ for all registers. */
void
-fetch_inferior_registers (regno)
- int regno;
+fetch_inferior_registers (int regnum)
{
- if (regno == -1)
- for (regno = 0; regno < NUM_REGS; regno++)
- fetch_register (regno);
+ if (regnum == -1)
+ for (regnum = 0; regnum < NUM_REGS; regnum++)
+ fetch_register (regnum);
else
- fetch_register (regno);
+ fetch_register (regnum);
}
-/* Registers we shouldn't try to store. */
-#if !defined (CANNOT_STORE_REGISTER)
-#define CANNOT_STORE_REGISTER(regno) 0
-#endif
-
-/* 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 register REGNUM into the inferior. */
-void
-store_inferior_registers (regno)
- int regno;
+static void
+store_register (int regnum)
{
- register unsigned int regaddr;
- char buf[80];
- register int i;
+ CORE_ADDR addr;
+ size_t size;
+ PTRACE_TYPE_RET *buf;
+ int tid, i;
+
+ if (CANNOT_STORE_REGISTER (regnum))
+ return;
- unsigned int offset = U_REGS_OFFSET;
+ /* GNU/Linux LWP ID's are process ID's. */
+ tid = TIDGET (inferior_ptid);
+ if (tid == 0)
+ tid = PIDGET (inferior_ptid); /* Not a threaded program. */
- if (regno >= 0)
+ /* This isn't really an address. But ptrace thinks of it as one. */
+ addr = register_addr (regnum, U_REGS_OFFSET);
+ size = register_size (current_gdbarch, regnum);
+
+ gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
+ buf = alloca (size);
+
+ /* Write the register contents into the inferior a chunk at the time. */
+ regcache_raw_collect (current_regcache, regnum, buf);
+ for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
{
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(PTRACE_XFER_TYPE))
- {
- errno = 0;
- 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);
- }
- regaddr += sizeof(PTRACE_XFER_TYPE);
- }
+ errno = 0;
+ ptrace (PT_WRITE_U, tid, (PTRACE_TYPE_ARG3) addr, buf[i]);
+ if (errno != 0)
+ error (_("Couldn't write register %s (#%d): %s."),
+ REGISTER_NAME (regnum), regnum, safe_strerror (errno));
+
+ addr += sizeof (PTRACE_TYPE_RET);
}
+}
+
+/* Store register REGNUM back into the inferior. If REGNUM is -1, do
+ this for all registers (including the floating point registers). */
+
+void
+store_inferior_registers (int regnum)
+{
+ if (regnum == -1)
+ for (regnum = 0; regnum < NUM_REGS; regnum++)
+ store_register (regnum);
else
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- {
- if (CANNOT_STORE_REGISTER (regno))
- continue;
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(PTRACE_XFER_TYPE))
- {
- errno = 0;
- 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);
- }
- regaddr += sizeof(PTRACE_XFER_TYPE);
- }
- }
- }
+ store_register (regnum);
}
-#endif /* !defined (FETCH_INFERIOR_REGISTERS). */
+
+#endif /* not FETCH_INFERIOR_REGISTERS. */
\f
+
+/* Set an upper limit on alloca. */
+#ifndef GDB_MAX_ALLOCA
+#define GDB_MAX_ALLOCA 0x1000
+#endif
+
+#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
- not write the data that I specified. I cannot understand where
- it got the data that it actually did write. */
-
-/* Copy LEN bytes to or from inferior's memory starting at MEMADDR
- to debugger memory starting at MYADDR. Copy to inferior if
- WRITE is nonzero.
-
- Returns the length copied, which is either the LEN argument or zero.
- This xfer function does not do partial moves, since child_ops
- doesn't allow memory operations to cross below us in the target stack
- anyway. */
+ 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 to or from inferior's memory starting at MEMADDR to
+ debugger memory starting at MYADDR. Copy to inferior if WRITE is
+ nonzero. TARGET is ignored.
+
+ Returns the length copied, which is either the LEN argument or
+ zero. This xfer function does not do partial moves, since
+ deprecated_child_ops doesn't allow memory operations to cross below
+ us in the target stack anyway. */
int
-child_xfer_memory (memaddr, myaddr, len, write, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
- struct target_ops *target; /* ignored */
+child_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
+ struct mem_attrib *attrib, struct target_ops *target)
{
- register int i;
+ int i;
/* Round starting address down to longword boundary. */
- register CORE_ADDR addr = memaddr & - sizeof (PTRACE_XFER_TYPE);
+ CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET);
/* Round ending address up; get number of longwords that makes. */
- register int count
- = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1)
- / sizeof (PTRACE_XFER_TYPE);
+ int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
+ / sizeof (PTRACE_TYPE_RET));
+ int alloc = count * sizeof (PTRACE_TYPE_RET);
+ PTRACE_TYPE_RET *buffer;
+ struct cleanup *old_chain = NULL;
+
+#ifdef PT_IO
+ /* OpenBSD 3.1, NetBSD 1.6 and FreeBSD 5.0 have a new PT_IO request
+ that promises to be much more efficient in reading and writing
+ data in the traced process's address space. */
+
+ {
+ struct ptrace_io_desc piod;
+
+ /* NOTE: We assume that there are no distinct address spaces for
+ instruction and data. */
+ piod.piod_op = write ? PIOD_WRITE_D : PIOD_READ_D;
+ piod.piod_offs = (void *) memaddr;
+ piod.piod_addr = myaddr;
+ piod.piod_len = len;
+
+ if (ptrace (PT_IO, PIDGET (inferior_ptid), (caddr_t) &piod, 0) == -1)
+ {
+ /* If the PT_IO request is somehow not supported, fallback on
+ using PT_WRITE_D/PT_READ_D. Otherwise we will return zero
+ to indicate failure. */
+ if (errno != EINVAL)
+ return 0;
+ }
+ else
+ {
+ /* Return the actual number of bytes read or written. */
+ return piod.piod_len;
+ }
+ }
+#endif
+
/* Allocate buffer of that many longwords. */
- register PTRACE_XFER_TYPE *buffer
- = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE));
+ if (len < GDB_MAX_ALLOCA)
+ {
+ buffer = (PTRACE_TYPE_RET *) alloca (alloc);
+ }
+ else
+ {
+ buffer = (PTRACE_TYPE_RET *) xmalloc (alloc);
+ old_chain = make_cleanup (xfree, buffer);
+ }
if (write)
{
- /* Fill start and end extra bytes of buffer with existing memory data. */
-
- if (addr != memaddr || len < (int) sizeof (PTRACE_XFER_TYPE)) {
- /* Need part of initial word -- fetch it. */
- buffer[0] = ptrace (PT_READ_I, inferior_pid, (PTRACE_ARG3_TYPE) addr,
- 0);
- }
-
- if (count > 1) /* FIXME, avoid if even boundary */
+ /* Fill start and end extra bytes of buffer with existing memory
+ data. */
+ if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET))
{
- buffer[count - 1]
- = ptrace (PT_READ_I, inferior_pid,
- ((PTRACE_ARG3_TYPE)
- (addr + (count - 1) * sizeof (PTRACE_XFER_TYPE))),
- 0);
+ /* Need part of initial word -- fetch it. */
+ buffer[0] = ptrace (PT_READ_I, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) addr, 0);
}
- /* Copy data to be written over corresponding part of buffer */
+ if (count > 1) /* FIXME, avoid if even boundary. */
+ {
+ buffer[count - 1] =
+ ptrace (PT_READ_I, PIDGET (inferior_ptid),
+ ((PTRACE_TYPE_ARG3)
+ (addr + (count - 1) * sizeof (PTRACE_TYPE_RET))), 0);
+ }
- memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)),
- myaddr,
- len);
+ /* Copy data to be written over corresponding part of buffer. */
+ memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
+ myaddr, len);
/* Write the entire buffer. */
-
- for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
+ for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
{
errno = 0;
- ptrace (PT_WRITE_D, inferior_pid, (PTRACE_ARG3_TYPE) addr,
- buffer[i]);
+ ptrace (PT_WRITE_D, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) addr, buffer[i]);
if (errno)
{
/* Using the appropriate one (I or D) is necessary for
- Gould NP1, at least. */
+ Gould NP1, at least. */
errno = 0;
- ptrace (PT_WRITE_I, inferior_pid, (PTRACE_ARG3_TYPE) addr,
- buffer[i]);
+ ptrace (PT_WRITE_I, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) addr, buffer[i]);
}
if (errno)
return 0;
}
else
{
- /* Read all the longwords */
- for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
+ /* Read all the longwords. */
+ for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
{
errno = 0;
- buffer[i] = ptrace (PT_READ_I, inferior_pid,
- (PTRACE_ARG3_TYPE) addr, 0);
+ buffer[i] = ptrace (PT_READ_I, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) addr, 0);
if (errno)
return 0;
QUIT;
/* Copy appropriate bytes out of the buffer. */
memcpy (myaddr,
- (char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)),
+ (char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
len);
}
+
+ if (old_chain != NULL)
+ do_cleanups (old_chain);
return len;
}
+\f
+
+static void
+udot_info (char *dummy1, int dummy2)
+{
+#if defined (KERNEL_U_SIZE)
+ long udot_off; /* Offset into user struct */
+ int udot_val; /* Value from user struct at udot_off */
+ char mess[128]; /* For messages */
+#endif
+
+ 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 ("%s:", paddr (udot_off));
+ }
+ udot_val = ptrace (PT_READ_U, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) udot_off, 0);
+ if (errno != 0)
+ {
+ sprintf (mess, "\nreading user struct at offset 0x%s",
+ paddr_nz (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
+}
+#endif /* !defined (CHILD_XFER_MEMORY). */
+\f
+
+void
+_initialize_infptrace (void)
+{
+#if !defined (CHILD_XFER_MEMORY)
+ add_info ("udot", udot_info,
+ _("Print contents of kernel ``struct user'' for current child."));
+#endif
+}
projects / deliverable / binutils-gdb.git / blobdiff