glibc.git/dlfcn, branch master

elf: Add SFrame support to _dl_find_object function

2025-07-14T09:56:35+00:00

The SFrame provides information to be able to do stack trace is now
well defined and implemented in Binutils 2.41.  The format simply
contains enough information to be able to do stack trace given a
program counter (PC) value, the stack pointer, and the frame pointer.
The SFrame information is stored in a .sframe ELF section, which is
loaded into its own PT_GNU_SFRAME segment. We consider for this support
SFrame version 2.

This patch adds the bits to _dl_find_object to recognize and store in
struct dl_find_object the necessary info about SFrame section.

Signed-off-by: Claudiu Zissulescu 
Reviewed-by: Florian Weimer

Update copyright dates with scripts/update-copyrights

2025-01-01T19:22:09+00:00

dlfcn: Reformat Makefile.

2024-02-25T18:38:16+00:00

Reflow and sort Makefile.

No code generation changes in non-test binary artifacts.

No regressions on x86_64 and i686.

Update copyright dates with scripts/update-copyrights

2024-01-01T18:53:40+00:00

Fix all the remaining misspellings -- BZ 25337

2023-06-02T01:39:48+00:00

Move libc_freeres_ptrs and libc_subfreeres to hidden/weak functions

2023-03-27T16:57:55+00:00

They are both used by __libc_freeres to free all library malloc
allocated resources to help tooling like mtrace or valgrind with
memory leak tracking.

The current scheme uses assembly markers and linker script entries
to consolidate the free routine function pointers in the RELRO segment
and to be freed buffers in BSS.

This patch changes it to use specific free functions for
libc_freeres_ptrs buffers and call the function pointer array directly
with call_function_static_weak.

It allows the removal of both the internal macros and the linker
script sections.

Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu.
Reviewed-by: Carlos O'Donell

Update copyright dates with scripts/update-copyrights

2023-01-06T21:14:39+00:00

dlfcn: Pass caller pointer to static dlopen implementation (bug 29446)

2022-08-04T15:54:48+00:00

Fixes commit 0c1c3a771eceec46e66ce1183cf988e2303bd373 ("dlfcn: Move
dlopen into libc").

dlfcn: Move RTLD_DEFAULT/RTLD_NEXT outside __USE_GNU

2022-05-23T17:23:23+00:00

POSIX reserves the RTLD_ namespace, and this is already reflected in our
conform tests.
Note: RTLD_DEFAULT and RTLD_NEXT appear in IEEE Std 1003.1-2004.  Many
systems (e.g. FreeBSD, musl) just define the macros unconditionally.

Reviewed-by: Florian Weimer 
Tested-by: Florian Weimer

dlfcn: Implement the RTLD_DI_PHDR request type for dlinfo

2022-04-29T15:00:53+00:00

The information is theoretically available via dl_iterate_phdr as
well, but that approach is very slow if there are many shared
objects.

Reviewed-by: Carlos O'Donell 
Tested-by: Carlos O'Donell