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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/Makefile | |
| 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 'elf/Makefile')
| -rw-r--r-- | elf/Makefile | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/elf/Makefile b/elf/Makefile index 9f3fadc..835b85b 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -35,7 +35,8 @@ dl-routines = $(addprefix dl-,load lookup object reloc deps \ execstack open close trampoline \ exception sort-maps lookup-direct \ call-libc-early-init write \ - thread_gscope_wait tls_init_tp) + thread_gscope_wait tls_init_tp \ + debug-symbols) ifeq (yes,$(use-ldconfig)) dl-routines += dl-cache endif @@ -203,7 +204,7 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \ tst-tls16 tst-tls17 tst-tls18 tst-tls19 tst-tls-dlinfo \ tst-align tst-align2 \ tst-dlmodcount tst-dlopenrpath tst-deep1 \ - tst-dlmopen1 tst-dlmopen3 \ + tst-dlmopen1 tst-dlmopen3 tst-dlmopen4 \ unload3 unload4 unload5 unload6 unload7 unload8 tst-global1 order2 \ tst-audit1 tst-audit2 tst-audit8 tst-audit9 \ tst-addr1 tst-thrlock \ @@ -1244,6 +1245,8 @@ $(objpfx)tst-dlmopen2.out: $(objpfx)tst-dlmopen1mod.so $(objpfx)tst-dlmopen3.out: $(objpfx)tst-dlmopen1mod.so +$(objpfx)tst-dlmopen4.out: $(objpfx)tst-dlmopen1mod.so + $(objpfx)tst-audit1.out: $(objpfx)tst-auditmod1.so tst-audit1-ENV = LD_AUDIT=$(objpfx)tst-auditmod1.so |