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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 2007-01-08 18:56:30 +00:00
parent 3bdcfdf41f
commit f822c95b59
5 changed files with 96 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2007-01-08 Daniel Jacobowitz <dan@codesourcery.com>
* 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.
2007-01-08 Ulrich Weigand <uweigand@de.ibm.com>
* frame.c (get_frame_register_bytes): New function.

6
gdb/NEWS
View File

@ -37,6 +37,12 @@ catch exception unhandled
catch assert
Stop the program execution when an Ada assertion failed.
set sysroot
show sysroot
Set an alternate system root for target files. This is a more
general version of "set solib-absolute-prefix", which is now
an alias to "set sysroot".
* New native configurations
OpenBSD/sh sh*-*openbsd*

8
gdb/doc/ChangeLog
View File

@ -1,3 +1,11 @@
2007-01-08 Daniel Jacobowitz <dan@codesourcery.com>
* 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.
2007-01-05 Joel Brobecker <brobecker@adacore.com>
* gdb.texinfo (Set Catchpoints): Add documentation for the new

75
gdb/doc/gdb.texinfo
View File

@ -11842,33 +11842,45 @@ to specify the search directories for target libraries.
@table @code
@cindex prefix for shared library file names
@cindex system root, alternate
@kindex set solib-absolute-prefix
@item set solib-absolute-prefix @var{path}
If this variable is set, @var{path} will be used as a prefix for any
absolute shared library paths; many runtime loaders store the absolute
paths to the shared library in the target program's memory. If you use
@samp{solib-absolute-prefix} to find shared libraries, they need to be laid
out in the same way that they are on the target, with e.g.@: a
@file{/usr/lib} hierarchy under @var{path}.
@kindex set sysroot
@item set sysroot @var{path}
Use @var{path} as the system root for the program being debugged. Any
absolute shared library paths will be prefixed with @var{path}; many
runtime loaders store the absolute paths to the shared library in the
target program's memory. If you use @code{set sysroot} to find shared
libraries, they need to be laid out in the same way that they are on
the target, with e.g.@: a @file{/lib} and @file{/usr/lib} hierarchy
under @var{path}.
@cindex default value of @samp{solib-absolute-prefix}
The @code{set solib-absolute-prefix} command is an alias for @code{set
sysroot}.
@cindex default system root
@cindex @samp{--with-sysroot}
You can set the default value of @samp{solib-absolute-prefix} by using the
configure-time @samp{--with-sysroot} option.
You can set the default system root by using the configure-time
@samp{--with-sysroot} option. If the system root is inside
@value{GDBN}'s configured binary prefix (set with @samp{--prefix} or
@samp{--exec-prefix}), then the default system root will be updated
automatically if the installed @value{GDBN} is moved to a new
location.
@kindex show solib-absolute-prefix
@item show solib-absolute-prefix
@kindex show sysroot
@item show sysroot
Display the current shared library prefix.
@kindex set solib-search-path
@item set solib-search-path @var{path}
If this variable is set, @var{path} is a colon-separated list of directories
to search for shared libraries. @samp{solib-search-path} is used after
@samp{solib-absolute-prefix} fails to locate the library, or if the path to
the library is relative instead of absolute. If you want to use
@samp{solib-search-path} instead of @samp{solib-absolute-prefix}, be sure to
set @samp{solib-absolute-prefix} to a nonexistant directory to prevent
@value{GDBN} from finding your host's libraries.
If this variable is set, @var{path} is a colon-separated list of
directories to search for shared libraries. @samp{solib-search-path}
is used after @samp{sysroot} fails to locate the library, or if the
path to the library is relative instead of absolute. If you want to
use @samp{solib-search-path} instead of @samp{sysroot}, be sure to set
@samp{sysroot} to a nonexistant directory to prevent @value{GDBN} from
finding your host's libraries. @samp{sysroot} is preferred; setting
it to a nonexistant directory may interfere with automatic loading
of shared library symbols.
@kindex show solib-search-path
@item show solib-search-path
@ -12709,25 +12721,34 @@ You can debug processes by name instead of process ID if your target has the
@code{pidof} utility:
@smallexample
target> gdbserver @var{comm} --attach `pidof @var{PROGRAM}`
target> gdbserver @var{comm} --attach `pidof @var{program}`
@end smallexample
In case more than one copy of @var{PROGRAM} is running, or @var{PROGRAM}
In case more than one copy of @var{program} is running, or @var{program}
has multiple threads, most versions of @code{pidof} support the
@code{-s} option to only return the first process ID.
@item On the host machine,
connect to your target (@pxref{Connecting,,Connecting to a remote target}).
first make sure you have the necessary symbol files. Load symbols for
your application using the @code{file} command before you connect. Use
@code{set sysroot} to locate target libraries (unless your @value{GDBN}
was compiled with the correct sysroot using @code{--with-system-root}).
The symbol file and target libraries must exactly match the executable
and libraries on the target, with one exception: the files on the host
system should not be stripped, even if the files on the target system
are. Mismatched or missing files will lead to confusing results
during debugging. On @sc{gnu}/Linux targets, mismatched or missing
files may also prevent @code{gdbserver} from debugging multi-threaded
programs.
Connect to your target (@pxref{Connecting,,Connecting to a remote target}).
For TCP connections, you must start up @code{gdbserver} prior to using
the @code{target remote} command. Otherwise you may get an error whose
text depends on the host system, but which usually looks something like
@samp{Connection refused}. You don't need to use the @code{load}
command in @value{GDBN} when using @code{gdbserver}, since the program is
already on the target. However, if you want to load the symbols (as
you normally would), do that with the @code{file} command, and issue
it @emph{before} connecting to the server; otherwise, you will get an
error message saying @code{"Program is already running"}, since the
program is considered running after the connection.
already on the target.
@end table

54
gdb/solib.c
View File

@ -85,10 +85,6 @@ static int solib_cleanup_queued = 0; /* make_run_cleanup called */
static void do_clear_solib (void *);
/* If non-zero, this is a prefix that will be added to the front of the name
shared libraries with an absolute filename for loading. */
static char *solib_absolute_prefix = NULL;
/* If non-empty, this is a search path for loading non-absolute shared library
symbol files. This takes precedence over the environment variables PATH
and LD_LIBRARY_PATH. */
@ -114,26 +110,26 @@ The search path for loading non-absolute shared library symbol files is %s.\n"),
DESCRIPTION
Global variable SOLIB_ABSOLUTE_PREFIX is used as a prefix directory
Global variable GDB_SYSROOT is used as a prefix directory
to search for shared libraries if they have an absolute path.
Global variable SOLIB_SEARCH_PATH is used as a prefix directory
(or set of directories, as in LD_LIBRARY_PATH) to search for all
shared libraries if not found in SOLIB_ABSOLUTE_PREFIX.
shared libraries if not found in GDB_SYSROOT.
Search algorithm:
* If there is a solib_absolute_prefix and path is absolute:
* Search for solib_absolute_prefix/path.
* If there is a gdb_sysroot and path is absolute:
* Search for gdb_sysroot/path.
* else
* Look for it literally (unmodified).
* Look in SOLIB_SEARCH_PATH.
* If available, use target defined search function.
* If solib_absolute_prefix is NOT set, perform the following two searches:
* If gdb_sysroot is NOT set, perform the following two searches:
* Look in inferior's $PATH.
* Look in inferior's $LD_LIBRARY_PATH.
*
* The last check avoids doing this search when targetting remote
* machines since solib_absolute_prefix will almost always be set.
* machines since gdb_sysroot will almost always be set.
RETURNS
@ -146,25 +142,24 @@ solib_open (char *in_pathname, char **found_pathname)
int found_file = -1;
char *temp_pathname = NULL;
char *p = in_pathname;
int solib_absolute_prefix_is_empty;
int gdb_sysroot_is_empty;
solib_absolute_prefix_is_empty = (solib_absolute_prefix == NULL
|| *solib_absolute_prefix == 0);
gdb_sysroot_is_empty = (gdb_sysroot == NULL || *gdb_sysroot == 0);
if (! IS_ABSOLUTE_PATH (in_pathname) || solib_absolute_prefix_is_empty)
if (! IS_ABSOLUTE_PATH (in_pathname) || gdb_sysroot_is_empty)
temp_pathname = in_pathname;
else
{
int prefix_len = strlen (solib_absolute_prefix);
int prefix_len = strlen (gdb_sysroot);
/* Remove trailing slashes from absolute prefix. */
while (prefix_len > 0
&& IS_DIR_SEPARATOR (solib_absolute_prefix[prefix_len - 1]))
&& IS_DIR_SEPARATOR (gdb_sysroot[prefix_len - 1]))
prefix_len--;
/* Cat the prefixed pathname together. */
temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1);
strncpy (temp_pathname, solib_absolute_prefix, prefix_len);
strncpy (temp_pathname, gdb_sysroot, prefix_len);
temp_pathname[prefix_len] = '\0';
strcat (temp_pathname, in_pathname);
}
@ -172,7 +167,7 @@ solib_open (char *in_pathname, char **found_pathname)
/* Now see if we can open it. */
found_file = open (temp_pathname, O_RDONLY | O_BINARY, 0);
/* If the search in solib_absolute_prefix failed, and the path name is
/* If the search in gdb_sysroot failed, and the path name is
absolute at this point, make it relative. (openp will try and open the
file according to its absolute path otherwise, which is not what we want.)
Affects subsequent searches for this solib. */
@ -206,14 +201,14 @@ solib_open (char *in_pathname, char **found_pathname)
&temp_pathname);
/* If not found, next search the inferior's $PATH environment variable. */
if (found_file < 0 && solib_absolute_prefix_is_empty)
if (found_file < 0 && gdb_sysroot_is_empty)
found_file = openp (get_in_environ (inferior_environ, "PATH"),
OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0,
&temp_pathname);
/* If not found, next search the inferior's $LD_LIBRARY_PATH
environment variable. */
if (found_file < 0 && solib_absolute_prefix_is_empty)
if (found_file < 0 && gdb_sysroot_is_empty)
found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"),
OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0,
&temp_pathname);
@ -979,18 +974,21 @@ inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
show_auto_solib_add,
&setlist, &showlist);
add_setshow_filename_cmd ("solib-absolute-prefix", class_support,
&solib_absolute_prefix, _("\
Set prefix for loading absolute shared library symbol files."), _("\
Show prefix for loading absolute shared library symbol files."), _("\
For other (relative) files, you can add values using `set solib-search-path'."),
add_setshow_filename_cmd ("sysroot", class_support,
&gdb_sysroot, _("\
Set an alternate system root."), _("\
Show the current system root."), _("\
The system root is used to load absolute shared library symbol files.\n\
For other (relative) files, you can add directories using\n\
`set solib-search-path'."),
reload_shared_libraries,
NULL,
&setlist, &showlist);
/* Set the default value of "solib-absolute-prefix" from the sysroot, if
one is set. */
solib_absolute_prefix = xstrdup (gdb_sysroot);
add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
&setlist);
add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
&showlist);
add_setshow_optional_filename_cmd ("solib-search-path", class_support,
&solib_search_path, _("\