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authorJan Kratochvil <jan.kratochvil@redhat.com>2007-09-02 19:55:32 +0000
committerJan Kratochvil <jan.kratochvil@redhat.com>2007-09-02 19:55:32 +0000
commit83f83d7f7f40aed0990387e52a47afacc4243d41 (patch)
tree0c54294fdad6a21f4c0f7f704b5bba3418dd46b3 /gdb/doc
parentd99148ef7338d24780a2ca8eed4ee228bcb1d4af (diff)
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* gdb.texinfo (Separate Debug Files): Cosmetic quoting removal.
Fixed the ``build ID'' name. New binaries build instructions for the build ID inclusion. Explain how the commands are specific to the build ID vs. debug link.
Diffstat (limited to 'gdb/doc')
-rw-r--r--gdb/doc/ChangeLog8
-rw-r--r--gdb/doc/gdb.texinfo36
2 files changed, 36 insertions, 8 deletions
diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 70c9e82..98d9111 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,11 @@
+2007-09-02 Jan Kratochvil <jan.kratochvil@redhat.com>
+ Eli Zaretskii <eliz@gnu.org>
+
+ * gdb.texinfo (Separate Debug Files): Cosmetic quoting removal.
+ Fixed the ``build ID'' name. New binaries build instructions for the
+ build ID inclusion. Explain how the commands are specific to the build
+ ID vs. debug link.
+
2007-09-01 Eli Zaretskii <eliz@gnu.org>
* gdb.texinfo (Separate Debug Files): Fix last change. Add
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 83899d3..66b10a3 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -11925,7 +11925,7 @@ only on some operating systems, notably on @sc{gnu}/Linux. For more
details about this feature, see
@uref{http://fedoraproject.org/wiki/Releases/FeatureBuildId, the
Fedora Project's description of the buid ID feature}.) The debug info
-file's name is not specified explicitly by the debug ID, but can be
+file's name is not specified explicitly by the build ID, but can be
computed from the build ID, see below.
@end itemize
@@ -11941,10 +11941,10 @@ directory, in a subdirectory whose name is identical to the leading
directories of the executable's absolute file name.
@item
-For the ``debug ID'' method, @value{GDBN} looks in the
+For the ``build ID'' method, @value{GDBN} looks in the
@file{.build-id} subdirectory of the global debug directory for a file
named @file{@var{nn}/@var{nnnnnnnn}.debug}, where @var{nn} are the
-first 2 hex characters of the debug ID signature, and @var{nnnnnnnn}
+first 2 hex characters of the build ID signature, and @var{nnnnnnnn}
are the rest of the signature. (Real signatures are 32 or more
characters, not 10.)
@end itemize
@@ -12033,16 +12033,36 @@ following commands:
@smallexample
@kbd{objcopy --only-keep-debug foo foo.debug}
@kbd{strip -g foo}
-@kbd{objcopy --add-gnu-debuglink="foo.debug" "foo"}
@end smallexample
@noindent
These commands remove the debugging
-information from the executable file @file{foo}, place it in the file
-@file{foo.debug}, and leave behind a debug link in @file{foo}. Ulrich
-Drepper's @file{elfutils} package, starting with version 0.53, contains
+information from the executable file @file{foo} and place it in the file
+@file{foo.debug}. You can use the first, second or both methods to link the
+two files:
+
+@itemize @bullet
+@item
+The debug link method needs the following additional command to also leave
+behind a debug link in @file{foo}:
+
+@smallexample
+@kbd{objcopy --add-gnu-debuglink=foo.debug foo}
+@end smallexample
+
+Ulrich Drepper's @file{elfutils} package, starting with version 0.53, contains
a version of the @code{strip} command such that the command @kbd{strip foo -f
-foo.debug} has the same functionality as the three commands above.
+foo.debug} has the same functionality as the two @code{objcopy} commands and
+the @code{ln -s} command above, together.
+
+@item
+Build ID gets embedded into the main executable using @code{ld --build-id} or
+the @value{NGCC} counterpart @code{gcc -Wl,--build-id}. Build ID support plus
+compatibility fixes for debug files separation are present in @sc{gnu} binary
+utilities (Binutils) since version 2.18.
+@end itemize
+
+@noindent
Since there are many different ways to compute CRC's for the debug
link (different polynomials, reversals, byte ordering, etc.), the