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* NEWS: Add "set sysroot" and "show sysroot".
* solib.c (solib_absolute_prefix): Delete. Replace all uses with gdb_sysroot. (_initialize_solib): Add "set sysroot" and "show sysroot". Make "solib-absolute-prefix" an alias to it. * gdb.texinfo (Commands to specify files): Describe "set sysroot" and "show sysroot". (Using the `gdbserver' program): Lowercase argument to @var. Expand description of setting up GDB on the host.
This commit is contained in:
Daniel Jacobowitz
parent
3bdcfdf41f
commit
f822c95b59
@ -1,3 +1,11 @@
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2007-01-08 Daniel Jacobowitz <dan@codesourcery.com>
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* NEWS: Add "set sysroot" and "show sysroot".
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* solib.c (solib_absolute_prefix): Delete. Replace
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all uses with gdb_sysroot.
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(_initialize_solib): Add "set sysroot" and "show sysroot".
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Make "solib-absolute-prefix" an alias to it.
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2007-01-08 Ulrich Weigand <uweigand@de.ibm.com>
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* frame.c (get_frame_register_bytes): New function.
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6
gdb/NEWS
6
gdb/NEWS
@ -37,6 +37,12 @@ catch exception unhandled
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catch assert
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Stop the program execution when an Ada assertion failed.
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set sysroot
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show sysroot
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Set an alternate system root for target files. This is a more
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general version of "set solib-absolute-prefix", which is now
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an alias to "set sysroot".
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* New native configurations
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OpenBSD/sh sh*-*openbsd*
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@ -1,3 +1,11 @@
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2007-01-08 Daniel Jacobowitz <dan@codesourcery.com>
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* gdb.texinfo (Commands to specify files): Describe
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"set sysroot" and "show sysroot".
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(Using the `gdbserver' program): Lowercase argument
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to @var. Expand description of setting up GDB on the
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host.
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2007-01-05 Joel Brobecker <brobecker@adacore.com>
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* gdb.texinfo (Set Catchpoints): Add documentation for the new
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@ -11842,33 +11842,45 @@ to specify the search directories for target libraries.
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@table @code
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@cindex prefix for shared library file names
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@cindex system root, alternate
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@kindex set solib-absolute-prefix
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@item set solib-absolute-prefix @var{path}
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If this variable is set, @var{path} will be used as a prefix for any
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absolute shared library paths; many runtime loaders store the absolute
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paths to the shared library in the target program's memory. If you use
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@samp{solib-absolute-prefix} to find shared libraries, they need to be laid
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out in the same way that they are on the target, with e.g.@: a
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@file{/usr/lib} hierarchy under @var{path}.
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@kindex set sysroot
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@item set sysroot @var{path}
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Use @var{path} as the system root for the program being debugged. Any
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absolute shared library paths will be prefixed with @var{path}; many
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runtime loaders store the absolute paths to the shared library in the
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target program's memory. If you use @code{set sysroot} to find shared
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libraries, they need to be laid out in the same way that they are on
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the target, with e.g.@: a @file{/lib} and @file{/usr/lib} hierarchy
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under @var{path}.
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@cindex default value of @samp{solib-absolute-prefix}
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The @code{set solib-absolute-prefix} command is an alias for @code{set
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sysroot}.
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@cindex default system root
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@cindex @samp{--with-sysroot}
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You can set the default value of @samp{solib-absolute-prefix} by using the
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configure-time @samp{--with-sysroot} option.
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You can set the default system root by using the configure-time
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@samp{--with-sysroot} option. If the system root is inside
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@value{GDBN}'s configured binary prefix (set with @samp{--prefix} or
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@samp{--exec-prefix}), then the default system root will be updated
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automatically if the installed @value{GDBN} is moved to a new
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location.
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@kindex show solib-absolute-prefix
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@item show solib-absolute-prefix
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@kindex show sysroot
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@item show sysroot
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Display the current shared library prefix.
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@kindex set solib-search-path
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@item set solib-search-path @var{path}
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If this variable is set, @var{path} is a colon-separated list of directories
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to search for shared libraries. @samp{solib-search-path} is used after
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@samp{solib-absolute-prefix} fails to locate the library, or if the path to
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the library is relative instead of absolute. If you want to use
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@samp{solib-search-path} instead of @samp{solib-absolute-prefix}, be sure to
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set @samp{solib-absolute-prefix} to a nonexistant directory to prevent
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@value{GDBN} from finding your host's libraries.
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If this variable is set, @var{path} is a colon-separated list of
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directories to search for shared libraries. @samp{solib-search-path}
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is used after @samp{sysroot} fails to locate the library, or if the
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path to the library is relative instead of absolute. If you want to
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use @samp{solib-search-path} instead of @samp{sysroot}, be sure to set
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@samp{sysroot} to a nonexistant directory to prevent @value{GDBN} from
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finding your host's libraries. @samp{sysroot} is preferred; setting
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it to a nonexistant directory may interfere with automatic loading
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of shared library symbols.
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@kindex show solib-search-path
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@item show solib-search-path
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@ -12709,25 +12721,34 @@ You can debug processes by name instead of process ID if your target has the
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@code{pidof} utility:
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@smallexample
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target> gdbserver @var{comm} --attach `pidof @var{PROGRAM}`
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target> gdbserver @var{comm} --attach `pidof @var{program}`
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@end smallexample
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In case more than one copy of @var{PROGRAM} is running, or @var{PROGRAM}
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In case more than one copy of @var{program} is running, or @var{program}
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has multiple threads, most versions of @code{pidof} support the
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@code{-s} option to only return the first process ID.
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@item On the host machine,
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connect to your target (@pxref{Connecting,,Connecting to a remote target}).
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first make sure you have the necessary symbol files. Load symbols for
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your application using the @code{file} command before you connect. Use
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@code{set sysroot} to locate target libraries (unless your @value{GDBN}
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was compiled with the correct sysroot using @code{--with-system-root}).
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The symbol file and target libraries must exactly match the executable
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and libraries on the target, with one exception: the files on the host
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system should not be stripped, even if the files on the target system
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are. Mismatched or missing files will lead to confusing results
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during debugging. On @sc{gnu}/Linux targets, mismatched or missing
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files may also prevent @code{gdbserver} from debugging multi-threaded
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programs.
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Connect to your target (@pxref{Connecting,,Connecting to a remote target}).
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For TCP connections, you must start up @code{gdbserver} prior to using
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the @code{target remote} command. Otherwise you may get an error whose
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text depends on the host system, but which usually looks something like
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@samp{Connection refused}. You don't need to use the @code{load}
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command in @value{GDBN} when using @code{gdbserver}, since the program is
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already on the target. However, if you want to load the symbols (as
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you normally would), do that with the @code{file} command, and issue
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it @emph{before} connecting to the server; otherwise, you will get an
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error message saying @code{"Program is already running"}, since the
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program is considered running after the connection.
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already on the target.
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@end table
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54
gdb/solib.c
54
gdb/solib.c
@ -85,10 +85,6 @@ static int solib_cleanup_queued = 0; /* make_run_cleanup called */
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static void do_clear_solib (void *);
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/* If non-zero, this is a prefix that will be added to the front of the name
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shared libraries with an absolute filename for loading. */
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static char *solib_absolute_prefix = NULL;
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/* If non-empty, this is a search path for loading non-absolute shared library
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symbol files. This takes precedence over the environment variables PATH
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and LD_LIBRARY_PATH. */
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@ -114,26 +110,26 @@ The search path for loading non-absolute shared library symbol files is %s.\n"),
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DESCRIPTION
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Global variable SOLIB_ABSOLUTE_PREFIX is used as a prefix directory
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Global variable GDB_SYSROOT is used as a prefix directory
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to search for shared libraries if they have an absolute path.
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Global variable SOLIB_SEARCH_PATH is used as a prefix directory
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(or set of directories, as in LD_LIBRARY_PATH) to search for all
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shared libraries if not found in SOLIB_ABSOLUTE_PREFIX.
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shared libraries if not found in GDB_SYSROOT.
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Search algorithm:
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* If there is a solib_absolute_prefix and path is absolute:
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* Search for solib_absolute_prefix/path.
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* If there is a gdb_sysroot and path is absolute:
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* Search for gdb_sysroot/path.
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* else
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* Look for it literally (unmodified).
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* Look in SOLIB_SEARCH_PATH.
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* If available, use target defined search function.
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* If solib_absolute_prefix is NOT set, perform the following two searches:
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* If gdb_sysroot is NOT set, perform the following two searches:
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* Look in inferior's $PATH.
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* Look in inferior's $LD_LIBRARY_PATH.
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*
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* The last check avoids doing this search when targetting remote
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* machines since solib_absolute_prefix will almost always be set.
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* machines since gdb_sysroot will almost always be set.
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RETURNS
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@ -146,25 +142,24 @@ solib_open (char *in_pathname, char **found_pathname)
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int found_file = -1;
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char *temp_pathname = NULL;
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char *p = in_pathname;
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int solib_absolute_prefix_is_empty;
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int gdb_sysroot_is_empty;
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solib_absolute_prefix_is_empty = (solib_absolute_prefix == NULL
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|| *solib_absolute_prefix == 0);
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gdb_sysroot_is_empty = (gdb_sysroot == NULL || *gdb_sysroot == 0);
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if (! IS_ABSOLUTE_PATH (in_pathname) || solib_absolute_prefix_is_empty)
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if (! IS_ABSOLUTE_PATH (in_pathname) || gdb_sysroot_is_empty)
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temp_pathname = in_pathname;
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else
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{
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int prefix_len = strlen (solib_absolute_prefix);
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int prefix_len = strlen (gdb_sysroot);
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/* Remove trailing slashes from absolute prefix. */
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while (prefix_len > 0
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&& IS_DIR_SEPARATOR (solib_absolute_prefix[prefix_len - 1]))
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&& IS_DIR_SEPARATOR (gdb_sysroot[prefix_len - 1]))
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prefix_len--;
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/* Cat the prefixed pathname together. */
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temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1);
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strncpy (temp_pathname, solib_absolute_prefix, prefix_len);
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strncpy (temp_pathname, gdb_sysroot, prefix_len);
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temp_pathname[prefix_len] = '\0';
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strcat (temp_pathname, in_pathname);
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}
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@ -172,7 +167,7 @@ solib_open (char *in_pathname, char **found_pathname)
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/* Now see if we can open it. */
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found_file = open (temp_pathname, O_RDONLY | O_BINARY, 0);
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/* If the search in solib_absolute_prefix failed, and the path name is
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/* If the search in gdb_sysroot failed, and the path name is
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absolute at this point, make it relative. (openp will try and open the
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file according to its absolute path otherwise, which is not what we want.)
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Affects subsequent searches for this solib. */
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@ -206,14 +201,14 @@ solib_open (char *in_pathname, char **found_pathname)
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&temp_pathname);
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/* If not found, next search the inferior's $PATH environment variable. */
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if (found_file < 0 && solib_absolute_prefix_is_empty)
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if (found_file < 0 && gdb_sysroot_is_empty)
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found_file = openp (get_in_environ (inferior_environ, "PATH"),
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OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0,
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&temp_pathname);
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/* If not found, next search the inferior's $LD_LIBRARY_PATH
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environment variable. */
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if (found_file < 0 && solib_absolute_prefix_is_empty)
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if (found_file < 0 && gdb_sysroot_is_empty)
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found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"),
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OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0,
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&temp_pathname);
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@ -979,18 +974,21 @@ inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
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show_auto_solib_add,
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&setlist, &showlist);
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add_setshow_filename_cmd ("solib-absolute-prefix", class_support,
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&solib_absolute_prefix, _("\
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Set prefix for loading absolute shared library symbol files."), _("\
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Show prefix for loading absolute shared library symbol files."), _("\
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For other (relative) files, you can add values using `set solib-search-path'."),
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add_setshow_filename_cmd ("sysroot", class_support,
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&gdb_sysroot, _("\
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Set an alternate system root."), _("\
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Show the current system root."), _("\
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The system root is used to load absolute shared library symbol files.\n\
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For other (relative) files, you can add directories using\n\
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`set solib-search-path'."),
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reload_shared_libraries,
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NULL,
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&setlist, &showlist);
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/* Set the default value of "solib-absolute-prefix" from the sysroot, if
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one is set. */
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solib_absolute_prefix = xstrdup (gdb_sysroot);
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add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
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&setlist);
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add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
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&showlist);
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add_setshow_optional_filename_cmd ("solib-search-path", class_support,
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&solib_search_path, _("\
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