/* Default child (native) target interface, for GDB when running under
Unix.
- Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
- 1998, 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1988-1996, 1998-2002, 2004-2005, 2007-2012 Free
+ Software Foundation, Inc.
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "regcache.h"
#include "target.h"
#include "inferior.h"
#include "gdb_string.h"
+#include "gdb_stat.h"
+#include "inf-child.h"
+#include "gdb/fileio.h"
+#include "agent.h"
+#include "gdb_wait.h"
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h> /* for MAXPATHLEN */
+#endif
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+/* Helper function for child_wait and the derivatives of child_wait.
+ HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
+ translation of that in OURSTATUS. */
+void
+store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus)
+{
+ if (WIFEXITED (hoststatus))
+ {
+ ourstatus->kind = TARGET_WAITKIND_EXITED;
+ ourstatus->value.integer = WEXITSTATUS (hoststatus);
+ }
+ else if (!WIFSTOPPED (hoststatus))
+ {
+ ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
+ ourstatus->value.sig = gdb_signal_from_host (WTERMSIG (hoststatus));
+ }
+ else
+ {
+ ourstatus->kind = TARGET_WAITKIND_STOPPED;
+ ourstatus->value.sig = gdb_signal_from_host (WSTOPSIG (hoststatus));
+ }
+}
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers. */
static void
-inf_child_fetch_inferior_registers (int regnum)
+inf_child_fetch_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
{
if (regnum == -1)
{
- for (regnum = 0; regnum < NUM_REGS; regnum++)
- regcache_raw_supply (current_regcache, regnum, NULL);
+ for (regnum = 0;
+ regnum < gdbarch_num_regs (get_regcache_arch (regcache));
+ regnum++)
+ regcache_raw_supply (regcache, regnum, NULL);
}
else
- regcache_raw_supply (current_regcache, regnum, NULL);
+ regcache_raw_supply (regcache, regnum, NULL);
}
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
this for all registers (including the floating point registers). */
static void
-inf_child_store_inferior_registers (int regnum)
+inf_child_store_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
{
}
-void
-inf_child_post_wait (ptid_t ptid, int wait_status)
-{
- /* This version of Unix doesn't require a meaningful "post wait"
- operation. */
-}
-
static void
inf_child_post_attach (int pid)
{
program being debugged. */
static void
-inf_child_prepare_to_store (void)
+inf_child_prepare_to_store (struct regcache *regcache)
{
}
static void
inf_child_open (char *arg, int from_tty)
{
- error ("Use the \"run\" command to start a Unix child process.");
+ error (_("Use the \"run\" command to start a Unix child process."));
}
static void
inferior" operation by a debugger. */
}
-static void
-inf_child_acknowledge_created_inferior (int pid)
-{
- /* This version of Unix doesn't require a meaningful "acknowledge
- created inferior" operation by a debugger. */
-}
-
static int
-inf_child_insert_fork_catchpoint (int pid)
+inf_child_follow_fork (struct target_ops *ops, int follow_child)
{
- /* This version of Unix doesn't support notification of fork
+ /* This version of Unix doesn't support following fork or vfork
events. */
return 0;
}
static int
-inf_child_remove_fork_catchpoint (int pid)
+inf_child_can_run (void)
{
- /* This version of Unix doesn't support notification of fork
- events. */
- return 0;
+ return 1;
}
+static char *
+inf_child_pid_to_exec_file (int pid)
+{
+ /* This version of Unix doesn't support translation of a process ID
+ to the filename of the executable file. */
+ return NULL;
+}
+
+
+/* Target file operations. */
+
static int
-inf_child_insert_vfork_catchpoint (int pid)
+inf_child_fileio_open_flags_to_host (int fileio_open_flags, int *open_flags_p)
{
- /* This version of Unix doesn't support notification of vfork
- events. */
+ int open_flags = 0;
+
+ if (fileio_open_flags & ~FILEIO_O_SUPPORTED)
+ return -1;
+
+ if (fileio_open_flags & FILEIO_O_CREAT)
+ open_flags |= O_CREAT;
+ if (fileio_open_flags & FILEIO_O_EXCL)
+ open_flags |= O_EXCL;
+ if (fileio_open_flags & FILEIO_O_TRUNC)
+ open_flags |= O_TRUNC;
+ if (fileio_open_flags & FILEIO_O_APPEND)
+ open_flags |= O_APPEND;
+ if (fileio_open_flags & FILEIO_O_RDONLY)
+ open_flags |= O_RDONLY;
+ if (fileio_open_flags & FILEIO_O_WRONLY)
+ open_flags |= O_WRONLY;
+ if (fileio_open_flags & FILEIO_O_RDWR)
+ open_flags |= O_RDWR;
+/* On systems supporting binary and text mode, always open files in
+ binary mode. */
+#ifdef O_BINARY
+ open_flags |= O_BINARY;
+#endif
+
+ *open_flags_p = open_flags;
return 0;
}
static int
-inf_child_remove_vfork_catchpoint (int pid)
+inf_child_errno_to_fileio_error (int errnum)
{
- /* This version of Unix doesn't support notification of vfork
- events. */
- return 0;
+ switch (errnum)
+ {
+ case EPERM:
+ return FILEIO_EPERM;
+ case ENOENT:
+ return FILEIO_ENOENT;
+ case EINTR:
+ return FILEIO_EINTR;
+ case EIO:
+ return FILEIO_EIO;
+ case EBADF:
+ return FILEIO_EBADF;
+ case EACCES:
+ return FILEIO_EACCES;
+ case EFAULT:
+ return FILEIO_EFAULT;
+ case EBUSY:
+ return FILEIO_EBUSY;
+ case EEXIST:
+ return FILEIO_EEXIST;
+ case ENODEV:
+ return FILEIO_ENODEV;
+ case ENOTDIR:
+ return FILEIO_ENOTDIR;
+ case EISDIR:
+ return FILEIO_EISDIR;
+ case EINVAL:
+ return FILEIO_EINVAL;
+ case ENFILE:
+ return FILEIO_ENFILE;
+ case EMFILE:
+ return FILEIO_EMFILE;
+ case EFBIG:
+ return FILEIO_EFBIG;
+ case ENOSPC:
+ return FILEIO_ENOSPC;
+ case ESPIPE:
+ return FILEIO_ESPIPE;
+ case EROFS:
+ return FILEIO_EROFS;
+ case ENOSYS:
+ return FILEIO_ENOSYS;
+ case ENAMETOOLONG:
+ return FILEIO_ENAMETOOLONG;
+ }
+ return FILEIO_EUNKNOWN;
}
+/* Open FILENAME on the target, using FLAGS and MODE. Return a
+ target file descriptor, or -1 if an error occurs (and set
+ *TARGET_ERRNO). */
static int
-inf_child_follow_fork (int follow_child)
+inf_child_fileio_open (const char *filename, int flags, int mode,
+ int *target_errno)
{
- /* This version of Unix doesn't support following fork or vfork
- events. */
- return 0;
+ int nat_flags;
+ int fd;
+
+ if (inf_child_fileio_open_flags_to_host (flags, &nat_flags) == -1)
+ {
+ *target_errno = FILEIO_EINVAL;
+ return -1;
+ }
+
+ /* We do not need to convert MODE, since the fileio protocol uses
+ the standard values. */
+ fd = open (filename, nat_flags, mode);
+ if (fd == -1)
+ *target_errno = inf_child_errno_to_fileio_error (errno);
+
+ return fd;
}
+/* Write up to LEN bytes from WRITE_BUF to FD on the target.
+ Return the number of bytes written, or -1 if an error occurs
+ (and set *TARGET_ERRNO). */
static int
-inf_child_insert_exec_catchpoint (int pid)
+inf_child_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
+ ULONGEST offset, int *target_errno)
{
- /* This version of Unix doesn't support notification of exec
- events. */
- return 0;
+ int ret;
+
+#ifdef HAVE_PWRITE
+ ret = pwrite (fd, write_buf, len, (long) offset);
+#else
+ ret = -1;
+#endif
+ /* If we have no pwrite or it failed for this file, use lseek/write. */
+ if (ret == -1)
+ {
+ ret = lseek (fd, (long) offset, SEEK_SET);
+ if (ret != -1)
+ ret = write (fd, write_buf, len);
+ }
+
+ if (ret == -1)
+ *target_errno = inf_child_errno_to_fileio_error (errno);
+
+ return ret;
}
+/* Read up to LEN bytes FD on the target into READ_BUF.
+ Return the number of bytes read, or -1 if an error occurs
+ (and set *TARGET_ERRNO). */
static int
-inf_child_remove_exec_catchpoint (int pid)
+inf_child_fileio_pread (int fd, gdb_byte *read_buf, int len,
+ ULONGEST offset, int *target_errno)
{
- /* This version of Unix doesn't support notification of exec
- events. */
- return 0;
+ int ret;
+
+#ifdef HAVE_PREAD
+ ret = pread (fd, read_buf, len, (long) offset);
+#else
+ ret = -1;
+#endif
+ /* If we have no pread or it failed for this file, use lseek/read. */
+ if (ret == -1)
+ {
+ ret = lseek (fd, (long) offset, SEEK_SET);
+ if (ret != -1)
+ ret = read (fd, read_buf, len);
+ }
+
+ if (ret == -1)
+ *target_errno = inf_child_errno_to_fileio_error (errno);
+
+ return ret;
}
+/* Close FD on the target. Return 0, or -1 if an error occurs
+ (and set *TARGET_ERRNO). */
static int
-inf_child_reported_exec_events_per_exec_call (void)
+inf_child_fileio_close (int fd, int *target_errno)
{
- /* This version of Unix doesn't support notification of exec
- events. */
- return 1;
+ int ret;
+
+ ret = close (fd);
+ if (ret == -1)
+ *target_errno = inf_child_errno_to_fileio_error (errno);
+
+ return ret;
}
+/* Unlink FILENAME on the target. Return 0, or -1 if an error
+ occurs (and set *TARGET_ERRNO). */
static int
-inf_child_can_run (void)
+inf_child_fileio_unlink (const char *filename, int *target_errno)
{
- return 1;
+ int ret;
+
+ ret = unlink (filename);
+ if (ret == -1)
+ *target_errno = inf_child_errno_to_fileio_error (errno);
+
+ return ret;
}
-static struct symtab_and_line *
-inf_child_enable_exception_callback (enum exception_event_kind kind,
- int enable)
+/* Read value of symbolic link FILENAME on the target. Return a
+ null-terminated string allocated via xmalloc, or NULL if an error
+ occurs (and set *TARGET_ERRNO). */
+static char *
+inf_child_fileio_readlink (const char *filename, int *target_errno)
{
- return (struct symtab_and_line *) NULL;
+ /* We support readlink only on systems that also provide a compile-time
+ maximum path length (MAXPATHLEN), at least for now. */
+#if defined (HAVE_READLINK) && defined (MAXPATHLEN)
+ char buf[MAXPATHLEN - 1];
+ int len;
+ char *ret;
+
+ len = readlink (filename, buf, sizeof buf);
+ if (len < 0)
+ {
+ *target_errno = inf_child_errno_to_fileio_error (errno);
+ return NULL;
+ }
+
+ ret = xmalloc (len + 1);
+ memcpy (ret, buf, len);
+ ret[len] = '\0';
+ return ret;
+#else
+ *target_errno = FILEIO_ENOSYS;
+ return NULL;
+#endif
}
-static struct exception_event_record *
-inf_child_get_current_exception_event (void)
+static int
+inf_child_use_agent (int use)
{
- return (struct exception_event_record *) NULL;
+ if (agent_loaded_p ())
+ {
+ use_agent = use;
+ return 1;
+ }
+ else
+ return 0;
}
-static char *
-inf_child_pid_to_exec_file (int pid)
+static int
+inf_child_can_use_agent (void)
{
- /* This version of Unix doesn't support translation of a process ID
- to the filename of the executable file. */
- return NULL;
+ return agent_loaded_p ();
}
struct target_ops *
inf_child_target (void)
{
struct target_ops *t = XZALLOC (struct target_ops);
+
t->to_shortname = "child";
t->to_longname = "Unix child process";
t->to_doc = "Unix child process (started by the \"run\" command).";
t->to_open = inf_child_open;
t->to_post_attach = inf_child_post_attach;
- t->to_post_wait = inf_child_post_wait;
t->to_fetch_registers = inf_child_fetch_inferior_registers;
t->to_store_registers = inf_child_store_inferior_registers;
t->to_prepare_to_store = inf_child_prepare_to_store;
t->to_terminal_ours = terminal_ours;
t->to_terminal_info = child_terminal_info;
t->to_post_startup_inferior = inf_child_post_startup_inferior;
- t->to_acknowledge_created_inferior = inf_child_acknowledge_created_inferior;
- t->to_insert_fork_catchpoint = inf_child_insert_fork_catchpoint;
- t->to_remove_fork_catchpoint = inf_child_remove_fork_catchpoint;
- t->to_insert_vfork_catchpoint = inf_child_insert_vfork_catchpoint;
- t->to_remove_vfork_catchpoint = inf_child_remove_vfork_catchpoint;
t->to_follow_fork = inf_child_follow_fork;
- t->to_insert_exec_catchpoint = inf_child_insert_exec_catchpoint;
- t->to_remove_exec_catchpoint = inf_child_remove_exec_catchpoint;
- t->to_reported_exec_events_per_exec_call =
- inf_child_reported_exec_events_per_exec_call;
t->to_can_run = inf_child_can_run;
- t->to_enable_exception_callback = inf_child_enable_exception_callback;
- t->to_get_current_exception_event = inf_child_get_current_exception_event;
t->to_pid_to_exec_file = inf_child_pid_to_exec_file;
t->to_stratum = process_stratum;
- t->to_has_all_memory = 1;
- t->to_has_memory = 1;
- t->to_has_stack = 1;
- t->to_has_registers = 1;
- t->to_has_execution = 1;
+ t->to_has_all_memory = default_child_has_all_memory;
+ t->to_has_memory = default_child_has_memory;
+ t->to_has_stack = default_child_has_stack;
+ t->to_has_registers = default_child_has_registers;
+ t->to_has_execution = default_child_has_execution;
+ t->to_fileio_open = inf_child_fileio_open;
+ t->to_fileio_pwrite = inf_child_fileio_pwrite;
+ t->to_fileio_pread = inf_child_fileio_pread;
+ t->to_fileio_close = inf_child_fileio_close;
+ t->to_fileio_unlink = inf_child_fileio_unlink;
+ t->to_fileio_readlink = inf_child_fileio_readlink;
t->to_magic = OPS_MAGIC;
+ t->to_use_agent = inf_child_use_agent;
+ t->to_can_use_agent = inf_child_can_use_agent;
return t;
}