Florian Weimer ea85e7d550 elf: Restore support for _r_debug interpositions and copy relocations ... The changes in commit a93d9e03a3 ("Extend struct r_debug to support multiple namespaces [BZ #15971]") break the dyninst dynamic instrumentation tool. It brings its own definition of _r_debug (rather than a declaration). Furthermore, it turns out it is rather hard to use the proposed handshake for accessing _r_debug via DT_DEBUG. If applications want to access _r_debug, they can do so directly if the relevant code has been built as PIC. To protect against harm from accidental copy relocations due to linker relaxations, this commit restores copy relocation support by adjusting both copies if interposition or copy relocations are in play. Therefore, it is possible to use a hidden reference in ld.so to access _r_debug. Only perform the copy relocation initialization if libc has been loaded. Otherwise, the ld.so search scope can be empty, and the lookup of the _r_debug symbol mail fail. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>		2025-07-05 20:15:12 +02:00
..
arpa	Add _FORTIFY_SOURCE support for inet_pton	2025-03-24 14:43:03 -04:00
bits	Add _FORTIFY_SOURCE support for inet_ntop	2025-03-21 09:35:42 +01:00
gnu	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
net	…
netinet	…
programs	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
protocols	…
rpc	Optimize __libc_tsd_* thread variable access	2025-05-16 19:53:09 +02:00
rpcsvc	…
sys	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
aio.h	…
aliases.h	Move 'aliases' routines from 'inet' into 'nss'	2023-10-24 12:30:59 +02:00
alloc_buffer.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
alloca.h	…
allocate_once.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
ar.h	…
argp-fmtstream.h	…
argp.h	…
argz.h	…
array_length.h	include/array_length.h: add array_foreach[_const] macros	2025-06-17 09:57:40 -03:00
assert.h	assert: Do not use stderr in libc-internal assert	2022-08-03 11:43:04 +02:00
atomic.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
atomic_wide_counter.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
byteswap.h	…
clone_internal.h	posix: Add pidfd_spawn and pidfd_spawnp (BZ 30349)	2023-09-05 13:08:59 -03:00
complex.h	…
cpio.h	…
ctype.h	Use proper extern declaration for _nl_C_LC_CTYPE_{class,toupper,tolower}	2025-05-16 19:53:09 +02:00
des.h	…
dirent.h	…
dlfcn.h	elf: Do not add a copy of _dl_find_object to libc.so	2025-02-01 12:37:58 +01:00
dso_handle.h	…
elf.h	elf: Add DL_ADDRESS_WITHOUT_RELOC [BZ #33088]	2025-07-01 03:44:52 +08:00
endian.h	…
envz.h	…
err.h	…
errno.h	stdlib: Do not use GLIBC_PRIVATE ABI for errno in libc_nonshared.a	2024-09-06 14:07:00 +02:00
error.h	Mark various cold functions as __COLD	2023-05-01 19:33:21 +02:00
execinfo.h	…
fcntl.h	…
features-time64.h	…
features.h	Bump version to 2.41	2025-01-28 18:25:13 +01:00
fenv.h	…
file_change_detection.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
filename.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
float.h	…
fmtmsg.h	…
fnmatch.h	…
fpu_control.h	…
fstab.h	…
fts.h	…
ftw.h	…
gconv.h	…
getopt.h	…
getopt_int.h	…
glob.h	…
gmp.h	Apply asm redirection in gmp.h before first use	2022-11-07 10:40:21 -03:00
gnu-versions.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
grp-merge.h	Remove 'grp' and merge into 'nss' and 'posix'	2023-10-24 12:30:59 +02:00
grp.h	Remove 'grp' and merge into 'nss' and 'posix'	2023-10-24 12:30:59 +02:00
gshadow.h	Remove 'gshadow' and merge into 'nss'	2023-10-24 12:30:59 +02:00
iconv.h	…
idx.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
ifaddrs.h	nscd: Do not rebuild getaddrinfo (bug 30709)	2023-08-11 10:10:16 +02:00
ifreq.h	…
ifunc-impl-list.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
inline-hashtab.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
intprops.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
inttypes.h	…
langinfo.h	…
lastlog.h	…
libc-diag.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
libc-internal.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
libc-misc.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
libc-pointer-arith.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
libc-symbols.h	Fix comment typo in libc-symbols.h	2025-05-27 11:34:14 +01:00
libgen.h	…
libintl.h	…
limits.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
link.h	elf: Restore support for _r_debug interpositions and copy relocations	2025-07-05 20:15:12 +02:00
list.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
list_t.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
locale.h	…
loop_unroll.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
malloc.h	…
math-narrow-eval.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
math.h	math: Remove __XXX math functions from installed math.h [BZ #32418]	2024-12-12 16:17:54 +08:00
mcheck.h	…
memory.h	…
mntent.h	…
monetary.h	…
mqueue.h	…
netdb.h	Move 'netgroup' routines from 'inet' into 'nss'	2023-10-24 12:30:59 +02:00
netgroup.h	Move 'netgroup' routines from 'inet' into 'nss'	2023-10-24 12:30:59 +02:00
nl_types.h	…
nss.h	…
nss_dns.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
nss_files.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
nsswitch.h	…
obstack.h	…
plural-exp.h	…
poll.h	…
printf.h	stdio-common: Convert vfprintf and related functions to buffers	2022-12-19 18:56:54 +01:00
printf_buffer.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
pthread.h	…
pty.h	…
pwd.h	Remove 'pwd' and merge into 'nss'	2023-10-24 12:30:59 +02:00
random-bits.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
re_comp.h	…
regex.h	Fix regex type usage	2023-05-01 09:08:59 -04:00
regexp.h	…
register-atfork.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
resolv.h	resolv: Add internal __res_binary_hnok function	2022-08-30 10:02:49 +02:00
rounding-mode.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
rtld-malloc.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
sched.h	…
scratch_buffer.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
search.h	…
set-freeres.h	elf: Merge __dl_libc_freemem into __rtld_libc_freeres	2025-02-02 20:10:09 +01:00
setjmp.h	chk: Add and fix hidden builtin definitions for *_chk	2023-08-03 22:46:48 +02:00
sgtty.h	…
shadow.h	Remove 'shadow' and merge into 'nss'	2023-10-24 12:30:59 +02:00
shlib-compat.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
shm-directory.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
signal.h	stdio: Remove the usage of $(fno-unit-at-a-time) for siglist.c	2022-05-13 10:54:41 -03:00
spawn.h	…
stab.h	…
stackinfo.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
stap-probe.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
stdbit.h	Implement C23 <stdbit.h>	2024-01-03 12:07:14 +00:00
stdc-predef.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
stdint.h	…
stdio.h	stdlib: Fix __libc_message_impl iovec size (BZ 32947)	2025-06-30 13:51:41 -03:00
stdio_ext.h	…
stdlib.h	debug: Improve '%n' fortify detection (BZ 30932)	2025-03-21 15:46:48 -03:00
string.h	include/string.h: Also redirect calls if not inlined in libpthread	2025-01-07 20:53:18 +01:00
strings.h	…
struct___timeb64.h	…
struct___timespec64.h	…
struct___timeval64.h	…
stubs-prologue.h	…
syscall.h	…
sysexits.h	…
syslog.h	…
tar.h	…
termios.h	termios: add new baud_t interface, defined to be explicitly numeric	2025-06-17 09:11:38 -03:00
tgmath.h	Don't use glibc <tgmath.h> when testing with Clang	2024-12-21 05:24:07 +08:00
time.h	Define in_int32_t_range to check if the 64 bit time_t syscall should be used	2022-11-17 14:35:13 -03:00
ttyent.h	…
uchar.h	…
ucontext.h	…
ulimit.h	…
unistd.h	io: replace local_isatty() with a proper function __isatty_nostatus()	2025-06-17 09:11:38 -03:00
unistd_ext.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
utime.h	…
utmp.h	…
values.h	Update copyright dates with scripts/update-copyrights	2025-01-01 11:22:09 -08:00
verify.h	…
wait.h	…
wchar.h	Refer to C23 in place of C2X in glibc	2024-02-01 11:02:01 +00:00
wctype.h	…
wordexp.h	…