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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-08-17 19:35:48 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-09-19 13:51:35 -0700 |
| commit | a93d9e03a31ec14405cb3a09aa95413b67067380 (patch) | |
| tree | 532f865c7241b3cf363433272e5923c468ea2969 /NEWS | |
| parent | 885762aa31d75de8b9fea4c0e2e372b582d4c548 (diff) | |
| download | glibc-a93d9e03a31ec14405cb3a09aa95413b67067380.zip glibc-a93d9e03a31ec14405cb3a09aa95413b67067380.tar.gz glibc-a93d9e03a31ec14405cb3a09aa95413b67067380.tar.bz2 | |
Extend struct r_debug to support multiple namespaces [BZ #15971]
Glibc does not provide an interface for debugger to access libraries
loaded in multiple namespaces via dlmopen.
The current rtld-debugger interface is described in the file:
elf/rtld-debugger-interface.txt
under the "Standard debugger interface" heading. This interface only
provides access to the first link-map (LM_ID_BASE).
1. Bump r_version to 2 when multiple namespaces are used. This triggers
the GDB bug:
https://sourceware.org/bugzilla/show_bug.cgi?id=28236
2. Add struct r_debug_extended to extend struct r_debug into a linked-list,
where each element correlates to an unique namespace.
3. Initialize the r_debug_extended structure. Bump r_version to 2 for
the new namespace and add the new namespace to the namespace linked list.
4. Add _dl_debug_update to return the address of struct r_debug' of a
namespace.
5. Add a hidden symbol, _r_debug_extended, for struct r_debug_extended.
6. Provide the symbol, _r_debug, with size of struct r_debug, as an alias
of _r_debug_extended, for programs which reference _r_debug.
This fixes BZ #15971.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 11 |
1 files changed, 10 insertions, 1 deletions
@@ -9,6 +9,9 @@ Version 2.35 Major new features: +* Bump r_version in the debugger interface to 2 and add a new field, + r_next, support multiple namespaces. + * Support for the C.UTF-8 locale has been added to glibc. The locale supports full code-point sorting for all valid Unicode code points. A limitation in the framework for fnmatch, regexec, and regcomp requires @@ -28,7 +31,13 @@ Major new features: Deprecated and removed features, and other changes affecting compatibility: - [Add deprecations, removals and changes affecting compatibility here] +* The r_version update in the debugger interface makes the glibc binary + incompatible with GDB binaries built without the following commits: + + c0154a4a21a gdb: Don't assume r_ldsomap when r_version > 1 on Linux + 4eb629d50d4 gdbserver: Check r_version < 1 for Linux debugger interface + + when audit modules or dlmopen are used. Changes to build and runtime requirements: |