/* Default child (native) target interface, for GDB when running under
Unix.
- Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
- 1999, 2000, 2001, 2002, 2004, 2005, 2007 Free Software Foundation, Inc.
+ Copyright (C) 1988-2014 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "regcache.h"
#include "symtab.h"
#include "target.h"
#include "inferior.h"
-#include "gdb_string.h"
+#include <string.h>
+#include <sys/stat.h>
+#include "inf-child.h"
+#include "gdb/fileio.h"
+#include "agent.h"
+#include "gdb_wait.h"
+#include "filestuff.h"
+
+#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 (struct regcache *regcache, 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++)
+ for (regnum = 0;
+ regnum < gdbarch_num_regs (get_regcache_arch (regcache));
+ regnum++)
regcache_raw_supply (regcache, regnum, NULL);
}
else
this for all registers (including the floating point registers). */
static void
-inf_child_store_inferior_registers (struct regcache *regcache, int regnum)
+inf_child_store_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
{
}
static void
-inf_child_post_attach (int pid)
+inf_child_post_attach (struct target_ops *self, int pid)
{
/* This version of Unix doesn't require a meaningful "post attach"
operation by a debugger. */
program being debugged. */
static void
-inf_child_prepare_to_store (void)
+inf_child_prepare_to_store (struct target_ops *self,
+ struct regcache *regcache)
{
}
}
static void
-inf_child_post_startup_inferior (ptid_t ptid)
+inf_child_post_startup_inferior (struct target_ops *self, ptid_t ptid)
{
/* This version of Unix doesn't require a meaningful "post startup
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 void
-inf_child_insert_fork_catchpoint (int pid)
+static int
+inf_child_follow_fork (struct target_ops *ops, int follow_child,
+ int detach_fork)
{
- /* 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 (struct target_ops *self)
{
- /* This version of Unix doesn't support notification of fork
- events. */
- return 0;
+ return 1;
}
-static void
-inf_child_insert_vfork_catchpoint (int pid)
+static char *
+inf_child_pid_to_exec_file (struct target_ops *self, int pid)
{
- /* This version of Unix doesn't support notification of vfork
- events. */
+ /* 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_remove_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_follow_fork (struct target_ops *ops, int follow_child)
+inf_child_errno_to_fileio_error (int errnum)
{
- /* This version of Unix doesn't support following fork or 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;
}
-static void
-inf_child_insert_exec_catchpoint (int pid)
+/* 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_fileio_open (struct target_ops *self,
+ const char *filename, int flags, int mode,
+ int *target_errno)
{
- /* This version of Unix doesn't support notification of exec
- events. */
+ 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 = gdb_open_cloexec (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_remove_exec_catchpoint (int pid)
+inf_child_fileio_pwrite (struct target_ops *self,
+ 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_reported_exec_events_per_exec_call (void)
+inf_child_fileio_pread (struct target_ops *self,
+ 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 1;
+ 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_can_run (void)
+inf_child_fileio_close (struct target_ops *self, int fd, int *target_errno)
{
- return 1;
-}
+ int ret;
-static struct symtab_and_line *
-inf_child_enable_exception_callback (enum exception_event_kind kind,
- int enable)
-{
- return (struct symtab_and_line *) NULL;
+ ret = close (fd);
+ if (ret == -1)
+ *target_errno = inf_child_errno_to_fileio_error (errno);
+
+ return ret;
}
-static struct exception_event_record *
-inf_child_get_current_exception_event (void)
+/* Unlink FILENAME on the target. Return 0, or -1 if an error
+ occurs (and set *TARGET_ERRNO). */
+static int
+inf_child_fileio_unlink (struct target_ops *self,
+ const char *filename, int *target_errno)
{
- return (struct exception_event_record *) NULL;
+ int ret;
+
+ ret = unlink (filename);
+ if (ret == -1)
+ *target_errno = inf_child_errno_to_fileio_error (errno);
+
+ return ret;
}
+/* 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_pid_to_exec_file (int pid)
+inf_child_fileio_readlink (const char *filename, int *target_errno)
{
- /* This version of Unix doesn't support translation of a process ID
- to the filename of the executable file. */
+ /* We support readlink only on systems that also provide a compile-time
+ maximum path length (PATH_MAX), at least for now. */
+#if defined (HAVE_READLINK) && defined (PATH_MAX)
+ char buf[PATH_MAX];
+ 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 int
+inf_child_use_agent (int use)
+{
+ if (agent_loaded_p ())
+ {
+ use_agent = use;
+ return 1;
+ }
+ else
+ return 0;
+}
+
+static int
+inf_child_can_use_agent (void)
+{
+ return agent_loaded_p ();
}
struct target_ops *
inf_child_target (void)
{
- struct target_ops *t = XZALLOC (struct target_ops);
+ struct target_ops *t = XCNEW (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_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;
}
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