Go to file
Adhemerval Zanella 4af6982e4c elf: Fix elf_get_dynamic_info definition
Before to 490e6c62aa ('elf: Avoid nested functions in the loader
[BZ #27220]'), elf_get_dynamic_info() was defined twice on rtld.c: on
the first dynamic-link.h include and later within _dl_start().  The
former definition did not define DONT_USE_BOOTSTRAP_MAP and it is used
on setup_vdso() (since it is a global definition), while the former does
define DONT_USE_BOOTSTRAP_MAP and it is used on loader self-relocation.

With the commit change, the function is now included and defined once
instead of defined as a nested function.  So rtld.c defines without
defining RTLD_BOOTSTRAP and it brokes at least powerpc32.

This patch fixes by moving the get-dynamic-info.h include out of
dynamic-link.h, which then the caller can corirectly set the expected
semantic by defining STATIC_PIE_BOOTSTRAP, RTLD_BOOTSTRAP, and/or
RESOLVE_MAP.

It also required to enable some asserts only for the loader bootstrap
to avoid issues when called from setup_vdso().

As a side note, this is another issues with nested functions: it is
not clear from pre-processed output (-E -dD) how the function will
be build and its semantic (since nested function will be local and
extra C defines may change it).

I checked on x86_64-linux-gnu (w/o --enable-static-pie),
i686-linux-gnu, powerpc64-linux-gnu, powerpc-linux-gnu-power4,
aarch64-linux-gnu, arm-linux-gnu, sparc64-linux-gnu, and
s390x-linux-gnu.

Reviewed-by: Fangrui Song <maskray@google.com>
2021-10-12 13:25:43 -03:00
argp Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
assert
benchtests benchtests: Add medium cases and increase iters in bench-memset.c 2021-10-08 15:13:06 -05:00
bits Add missing braces to bsearch inline implementation [BZ #28400] 2021-09-30 20:40:12 +02:00
catgets Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
ChangeLog.old Update ChangeLog.old/ChangeLog.23. 2021-08-01 21:33:43 -04:00
conform Use $(pie-default) with conformtest 2021-09-17 19:24:14 +00:00
crypt Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
csu Extend struct r_debug to support multiple namespaces [BZ #15971] 2021-09-19 13:51:35 -07:00
ctype
debug Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
dirent Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
dlfcn Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
elf elf: Fix elf_get_dynamic_info definition 2021-10-12 13:25:43 -03:00
gmon Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
gnulib Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
grp Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
gshadow Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
hesiod Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
htl htl: Fix sigset of main thread 2021-09-26 02:40:26 +02:00
hurd Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
iconv iconvconfig: Fix behaviour with --prefix [BZ #28199] 2021-09-13 20:48:35 +05:30
iconvdata Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
include misc: Add __get_nprocs_sched 2021-09-27 09:13:06 -03:00
inet Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
intl Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
io io: Fix ftw internal realloc buffer (BZ #28126) 2021-10-07 11:09:16 -03:00
libio Add C2X _PRINTF_NAN_LEN_MAX 2021-09-30 20:53:34 +00:00
locale locale: Add missing second argument to _Static_assert in C-collate-seq.c 2021-09-06 19:43:37 +02:00
localedata Update to Unicode 14.0.0 [BZ #28390] 2021-10-04 08:54:27 +02:00
login Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
mach
malloc misc: Add __get_nprocs_sched 2021-09-27 09:13:06 -03:00
manual Add C2X _PRINTF_NAN_LEN_MAX 2021-09-30 20:53:34 +00:00
math math: Also xfail the new j0f tests for ibm128-libgcc 2021-10-06 10:50:31 -03:00
mathvec
misc misc: Add __get_nprocs_sched 2021-09-27 09:13:06 -03:00
nis Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
nptl nptl: pthread_kill must send signals to a specific thread [BZ #28407] 2021-10-01 18:16:41 +02:00
nptl_db Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
nscd Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
nss Fix failing nss/tst-nss-files-hosts-long with local resolver 2021-09-07 21:41:38 +02:00
po po/nl.po: Update Dutch translation. 2021-08-01 20:52:28 -04:00
posix elf: Avoid deadlock between pthread_create and ctors [BZ #28357] 2021-10-04 15:07:05 +01:00
pwd Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
resolv resolv: Avoid GCC 12 false positive warning [BZ #28439]. 2021-10-11 09:36:57 -06:00
resource y2038: Add support for 64-bit time on legacy ABIs 2021-06-15 10:42:11 -03:00
rt Remove unreliable parts of rt/tst-cpuclock2 2021-10-07 22:38:49 -04:00
scripts build-many-glibcs.py: add powerpc64le glibc variant without multiarch 2021-09-24 14:32:35 -05:00
setjmp nptl: Move __pthread_unwind_next into libc 2021-04-21 19:49:50 +02:00
shadow Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
signal Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
socket Linux: Simplify __opensock and fix race condition [BZ #28353] 2021-09-28 18:55:49 +02:00
soft-fp Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
stdio-common Fix stdio-common tests for GCC 12 -Waddress 2021-10-04 19:10:43 +00:00
stdlib Fix stdlib/tst-setcontext.c for GCC 12 -Warray-compare 2021-10-05 14:25:40 +00:00
string Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
sunrpc Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
support Add TEST_COMPARE_STRING_WIDE to support/check.h 2021-10-12 13:48:39 +00:00
sysdeps elf: Fix elf_get_dynamic_info definition 2021-10-12 13:25:43 -03:00
sysvipc Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
termios
time Fix subscript error with odd TZif file [BZ #28338] 2021-10-07 11:09:16 -03:00
timezone Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
wcsmbs Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
wctype Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
.gitattributes
.gitignore
abi-tags
aclocal.m4 configure: Replaced obsolete AC_TRY_COMPILE 2021-06-04 10:16:00 -03:00
config.h.in elf: Remove Intel MPX support (lazy PLT, ld.so profile, and LD_AUDIT) 2021-10-11 11:14:02 -07:00
config.make.in Add pthread-in-libc, libpthread-routines-var, librt-routines-var 2021-05-03 08:13:32 +02:00
configure configure: Fix check for INSERT in linker script 2021-09-13 12:39:20 -07:00
configure.ac configure: Fix check for INSERT in linker script 2021-09-13 12:39:20 -07:00
CONTRIBUTED-BY Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
COPYING
COPYING.LIB
extra-lib.mk
gen-locales.mk
INSTALL Update install.texi, and regenerate INSTALL. 2021-08-01 16:48:43 -04:00
libc-abis
libof-iterator.mk
LICENSES
MAINTAINERS
Makeconfig Run conform/ tests using newly built libc 2021-09-17 13:12:10 +00:00
Makefile testrun.sh: Add support for --tool=rpctrace 2021-09-10 01:24:10 +02:00
Makefile.help
Makefile.in
Makerules Install shared objects under their ABI names 2021-06-28 08:33:57 +02:00
NEWS elf: Remove Intel MPX support (lazy PLT, ld.so profile, and LD_AUDIT) 2021-10-11 11:14:02 -07:00
o-iterator.mk
README
Rules Move malloc hooks into a compat DSO 2021-07-22 18:37:59 +05:30
SHARED-FILES Mention today's regex merge in SHARED-FILES 2021-09-21 18:00:10 -07:00
shlib-versions Move malloc hooks into a compat DSO 2021-07-22 18:37:59 +05:30
test-skeleton.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
version.h Open master branch for glibc 2.35 development 2021-08-01 21:54:40 -04:00

This directory contains the sources of the GNU C Library.
See the file "version.h" for what release version you have.

The GNU C Library is the standard system C library for all GNU systems,
and is an important part of what makes up a GNU system.  It provides the
system API for all programs written in C and C-compatible languages such
as C++ and Objective C; the runtime facilities of other programming
languages use the C library to access the underlying operating system.

In GNU/Linux systems, the C library works with the Linux kernel to
implement the operating system behavior seen by user applications.
In GNU/Hurd systems, it works with a microkernel and Hurd servers.

The GNU C Library implements much of the POSIX.1 functionality in the
GNU/Hurd system, using configurations i[4567]86-*-gnu.

When working with Linux kernels, this version of the GNU C Library
requires Linux kernel version 3.2 or later.

Also note that the shared version of the libgcc_s library must be
installed for the pthread library to work correctly.

The GNU C Library supports these configurations for using Linux kernels:

	aarch64*-*-linux-gnu
	alpha*-*-linux-gnu
	arc*-*-linux-gnu
	arm-*-linux-gnueabi
	csky-*-linux-gnuabiv2
	hppa-*-linux-gnu
	i[4567]86-*-linux-gnu
	x86_64-*-linux-gnu	Can build either x86_64 or x32
	ia64-*-linux-gnu
	m68k-*-linux-gnu
	microblaze*-*-linux-gnu
	mips-*-linux-gnu
	mips64-*-linux-gnu
	powerpc-*-linux-gnu	Hardware or software floating point, BE only.
	powerpc64*-*-linux-gnu	Big-endian and little-endian.
	s390-*-linux-gnu
	s390x-*-linux-gnu
	riscv32-*-linux-gnu
	riscv64-*-linux-gnu
	sh[34]-*-linux-gnu
	sparc*-*-linux-gnu
	sparc64*-*-linux-gnu

If you are interested in doing a port, please contact the glibc
maintainers; see https://www.gnu.org/software/libc/ for more
information.

See the file INSTALL to find out how to configure, build, and install
the GNU C Library.  You might also consider reading the WWW pages for
the C library at https://www.gnu.org/software/libc/.

The GNU C Library is (almost) completely documented by the Texinfo manual
found in the `manual/' subdirectory.  The manual is still being updated
and contains some known errors and omissions; we regret that we do not
have the resources to work on the manual as much as we would like.  For
corrections to the manual, please file a bug in the `manual' component,
following the bug-reporting instructions below.  Please be sure to check
the manual in the current development sources to see if your problem has
already been corrected.

Please see https://www.gnu.org/software/libc/bugs.html for bug reporting
information.  We are now using the Bugzilla system to track all bug reports.
This web page gives detailed information on how to report bugs properly.

The GNU C Library is free software.  See the file COPYING.LIB for copying
conditions, and LICENSES for notices about a few contributions that require
these additional notices to be distributed.  License copyright years may be
listed using range notation, e.g., 1996-2015, indicating that every year in
the range, inclusive, is a copyrightable year that would otherwise be listed
individually.