glibc/elf/rtld-debugger-interface.txt, branch vdsoFork of glibc for developmenthttps://git.zx2c4.com/glibc/atom/elf/rtld-debugger-interface.txt?h=vdso2021-09-19T20:51:35ZExtend struct r_debug to support multiple namespaces [BZ #15971]2021-09-19T20:51:35ZH.J. Luhjl.tools@gmail.com2021-08-18T02:35:48Zurn:sha1:a93d9e03a31ec14405cb3a09aa95413b67067380
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>
Add SystemTap static probes to the runtime linker. [BZ #14298]2012-07-27T13:03:20ZGary Bensongbenson@redhat.com2012-07-26T10:03:35Zurn:sha1:815e6fa3e010628f77838abec18692cbfeb60809