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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 /elf/dl-load.c | |
| parent | 885762aa31d75de8b9fea4c0e2e372b582d4c548 (diff) | |
| download | glibc-a93d9e03a31ec14405cb3a09aa95413b67067380.tar glibc-a93d9e03a31ec14405cb3a09aa95413b67067380.tar.gz glibc-a93d9e03a31ec14405cb3a09aa95413b67067380.tar.bz2 glibc-a93d9e03a31ec14405cb3a09aa95413b67067380.zip | |
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 'elf/dl-load.c')
| -rw-r--r-- | elf/dl-load.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c index 650e4edc35..39e0d074b4 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -949,7 +949,7 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd, /* Initialize to keep the compiler happy. */ const char *errstring = NULL; int errval = 0; - struct r_debug *r = _dl_debug_initialize (0, nsid); + struct r_debug *r = _dl_debug_update (nsid); bool make_consistent = false; /* Get file information. To match the kernel behavior, do not fill |