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Fangrui Song 1305edd42c elf: Move post-relocation code of _dl_start into _dl_start_final
On non-PI_STATIC_AND_HIDDEN architectures, getting the address of
_rtld_local_ro (for GLRO (dl_final_object)) goes through a GOT entry.
The GOT load may be reordered before self relocation, leading to an
unrelocated/incorrect _rtld_local_ro address.

84e02af1eb tickled GCC powerpc32 to
reorder the GOT load before relative relocations, leading to ld.so
crash. This is similar to the m68k jump table reordering issue fixed by
a8e9b5b807.

Move code after self relocation into _dl_start_final to avoid the
reordering. This fixes powerpc32 and may help other architectures when
ELF_DYNAMIC_RELOCATE is simplified in the future.
2022-04-25 10:30:27 -07:00
argp
assert
benchtests benchtests: Improve bench-strrchr 2022-04-22 23:07:54 -05:00
bits elf: Issue la_symbind for bind-now (BZ #23734) 2022-02-01 14:49:46 -03:00
catgets
ChangeLog.old Create ChangeLog.old/ChangeLog.24. 2022-02-03 00:27:54 -05:00
conform hurd: drop SA_SIGINFO availability xfail 2022-01-15 17:43:07 +01:00
crypt crypt: Remove unused variable on cert test 2022-03-31 09:00:54 -03:00
csu elf: Remove __libc_init_secure 2022-04-19 15:52:27 -07:00
ctype
debug misc: Fix rare fortify crash on wchar funcs. [BZ 29030] 2022-04-25 17:32:30 +05:30
dirent associate a deallocation for opendir 2022-03-14 20:02:46 +05:30
dlfcn
elf elf: Move post-relocation code of _dl_start into _dl_start_final 2022-04-25 10:30:27 -07:00
gmon
gnulib
grp Add access function attributes to grp and shadow headers 2022-03-14 20:02:30 +05:30
gshadow Add access function attributes to grp and shadow headers 2022-03-14 20:02:30 +05:30
hesiod
htl htl: Destroy thread-specific data before releasing joins 2022-02-14 19:29:02 +01:00
hurd Replace {u}int_fast{16|32} with {u}int32_t 2022-04-13 21:23:04 -05:00
iconv Replace {u}int_fast{16|32} with {u}int32_t 2022-04-13 21:23:04 -05:00
iconvdata Replace {u}int_fast{16|32} with {u}int32_t 2022-04-13 21:23:04 -05:00
include elf: Remove __libc_init_secure 2022-04-19 15:52:27 -07:00
inet inet: Return EAI_MEMORY when nrl_domainname() fails to allocate memory 2022-03-08 12:51:29 -03:00
intl intl: Avoid -Wuse-after-free [BZ #26779] 2022-01-25 17:38:31 -07:00
io io: Add fsync call in tst-stat 2022-02-28 11:50:41 +01:00
libio libio: Flush-only _IO_str_overflow must not return EOF (bug 28949) 2022-03-18 21:40:02 +01:00
locale Replace {u}int_fast{16|32} with {u}int32_t 2022-04-13 21:23:04 -05:00
localedata Add locale for syr_SY 2022-04-21 13:05:40 +02:00
login
mach mach: Fix LLL_SHARED value 2022-02-14 19:29:02 +01:00
malloc malloc: Fix duplicate inline for do_set_mxfast 2022-03-23 12:28:44 -03:00
manual Default to --with-default-link=no (bug 25812) 2022-04-22 10:59:03 +02:00
math math: Add more input to atanh accuracy tests 2022-02-24 09:20:43 -08:00
mathvec
misc misc: Fix rare fortify crash on wchar funcs. [BZ 29030] 2022-04-25 17:32:30 +05:30
nis
nptl nptl: Fix pthread_cancel cancelhandling atomic operations 2022-04-20 12:01:43 -03:00
nptl_db
nscd nscd: Remove unused variable 2022-03-23 15:33:17 -03:00
nss hurd: Fix arbitrary error code 2022-04-12 22:15:48 +02:00
po Update translations. 2022-02-02 23:30:15 -05:00
posix Replace {u}int_fast{16|32} with {u}int32_t 2022-04-13 21:23:04 -05:00
pwd
resolv Replace {u}int_fast{16|32} with {u}int32_t 2022-04-13 21:23:04 -05:00
resource
rt rt/tst-mqueue*: Return UNSUPPORTED when mq_open fails with ENOSYS 2022-01-17 19:17:41 +01:00
scripts scripts/glibcelf.py: Mark as UNSUPPORTED on Python 3.5 and earlier 2022-04-25 09:14:49 +02:00
setjmp
shadow Add access function attributes to grp and shadow headers 2022-03-14 20:02:30 +05:30
signal
socket socket: Add the __sockaddr_un_set function 2022-01-17 10:21:53 +01:00
soft-fp
stdio-common stdio: Split __get_errname definition from errlist.c 2022-04-15 09:37:57 -03:00
stdlib stdlib: Reflow and sort most variable assignments 2022-04-13 16:52:39 -03:00
string Replace {u}int_fast{16|32} with {u}int32_t 2022-04-13 21:23:04 -05:00
sunrpc CVE-2022-23218: Buffer overflow in sunrpc svcunix_create (bug 28768) 2022-01-17 10:47:58 +01:00
support support: Add xmkfifo 2022-04-15 09:59:33 -03:00
sysdeps elf: Remove unused enum allowmask 2022-04-25 01:01:02 -07:00
sysvipc
termios posix: Add terminal control setting support for posix_spawn 2022-01-25 14:07:53 -03:00
time
timezone
wcsmbs
wctype
.clang-format Add .clang-format style file 2022-04-11 10:51:03 -05:00
.gitattributes
.gitignore
abi-tags
aclocal.m4
config.h.in Remove -z combreloc and HAVE_Z_COMBRELOC 2022-04-04 17:19:07 -07:00
config.make.in Remove -z combreloc and HAVE_Z_COMBRELOC 2022-04-04 17:19:07 -07:00
configure Default to --with-default-link=no (bug 25812) 2022-04-22 10:59:03 +02:00
configure.ac Default to --with-default-link=no (bug 25812) 2022-04-22 10:59:03 +02:00
CONTRIBUTED-BY
COPYING
COPYING.LIB
extra-lib.mk
gen-locales.mk
INSTALL Default to --with-default-link=no (bug 25812) 2022-04-22 10:59:03 +02:00
libc-abis
libof-iterator.mk
LICENSES
MAINTAINERS
Makeconfig Remove -z combreloc and HAVE_Z_COMBRELOC 2022-04-04 17:19:07 -07:00
Makefile
Makefile.help
Makefile.in
Makerules build: Properly generate .d dependency files [BZ #28922] 2022-02-25 10:35:45 -08:00
NEWS NEWS: Move PLT tracking slowdown to glibc 2.35. 2022-04-12 13:26:10 -04:00
o-iterator.mk
README
Rules
SHARED-FILES
shlib-versions nss: Do not mention NSS test modules in <gnu/lib-names.h> 2022-03-11 08:24:04 +01:00
test-skeleton.c
version.h Open master branch for glibc 2.36 development 2022-02-03 01:21:33 -05:00

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
	or1k-*-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.