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glibc/sysdeps/unix/sysv/linux
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Florian Weimer 035c012e32 Reduce the statically linked startup code [BZ #23323] 
It turns out the startup code in csu/elf-init.c has a perfect pair of
ROP gadgets (see Marco-Gisbert and Ripoll-Ripoll, "return-to-csu: A
New Method to Bypass 64-bit Linux ASLR").  These functions are not
needed in dynamically-linked binaries because DT_INIT/DT_INIT_ARRAY
are already processed by the dynamic linker.  However, the dynamic
linker skipped the main program for some reason.  For maximum
backwards compatibility, this is not changed, and instead, the main
map is consulted from __libc_start_main if the init function argument
is a NULL pointer.

For statically linked binaries, the old approach based on linker
symbols is still used because there is nothing else available.

A new symbol version __libc_start_main@@GLIBC_2.34 is introduced because
new binaries running on an old libc would not run their ELF
constructors, leading to difficult-to-debug issues.
 		2021-02-25 12:13:02 +01:00
..
aarch64 Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
alpha Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
arc Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
arm Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
bits sysconf: Add _SC_MINSIGSTKSZ/_SC_SIGSTKSZ [BZ #20305] 2021-02-01 11:00:52 -08:00
csky Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
generic linux: Remove stat-check.c 2021-02-11 08:02:16 -03:00
hppa Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
i386 Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
ia64 Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
include
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m68k Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
microblaze Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
mips Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
net
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netash
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netatalk
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netax25
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neteconet
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netinet
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netipx
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netiucv
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netpacket
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netrom
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netrose
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nfs
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nios2 Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
powerpc Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
riscv Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
s390 Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
scsi
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sh Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
sparc Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
sys Add MS_NOSYMFOLLOW from Linux 5.10 to <sys/mount.h>. 2021-02-02 01:17:00 +00:00
wordsize-64 linux: Consolidate statvfs implementations 2021-02-11 08:00:41 -03:00
x86 nptl: Move elision implementations into libc 2021-02-23 14:59:34 +01:00
x86_64 Reduce the statically linked startup code [BZ #23323] 2021-02-25 12:13:02 +01:00
Implies
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Makefile linux: Consolidate internal_statvfs 2021-02-11 08:00:48 -03:00
Versions
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_G_config.h
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_exit.c
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a.out.h
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accept.c
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accept4.c
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access.c
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adjtime.c
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adjtimex.c
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aio_misc.h
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aio_sigqueue.c
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alphasort64.c
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arch-fd_to_filename.h
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arch-fork.h
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bind.c
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brk.c
…
check_native.c
…
check_pf.c
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clock.c
…
clock_adjtime.c
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clock_getcpuclockid.c
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clock_getres.c
…
clock_gettime.c
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clock_nanosleep.c
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clock_settime.c
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close.c
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close_nocancel.c
…
closedir.c
…
cmsg_nxthdr.c
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cnd_timedwait.c
…
configure
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configure.ac
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connect.c
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copy_file_range.c
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creat.c
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creat64.c
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createthread.c
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default-sched.h
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device-nrs.h
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dirfd.c
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dirstream.h
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dl-execstack.c
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dl-fxstatat64.c
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dl-getcwd.c
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dl-librecon.h
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dl-openat64.c
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dl-opendir.c
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dl-origin.c
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dl-osinfo.h
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dl-sbrk.c
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dl-sysdep.c
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dl-sysdep.h
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dl-vdso-setup.c
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dl-vdso-setup.h
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dl-vdso.h
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dl-write.c
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dl-writev.h
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epoll_pwait.c
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epoll_wait.c
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errlist-compat.c
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errlist-compat.h
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errqueue.h
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eventfd_read.c
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eventfd_write.c
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exit-thread.h
…
faccessat.c
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fallocate.c
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fallocate64.c
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fatal-prepare.h
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fchmodat.c
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fcntl.c
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fcntl64.c
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fcntl_nocancel.c
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fdatasync.c
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fdopendir.c
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fexecve.c
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filter-nr-syscalls.awk
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fips-private.h
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fixup-asm-unistd.h
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fpathconf.c
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fstat.c
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fstat64.c
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fstatat.c
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fstatat64.c linux: Remove stat-check.c 2021-02-11 08:02:16 -03:00
fstatfs.c linux: Consolidate fstatfs implementations 2021-02-11 07:58:31 -03:00
fstatfs64.c linux: Consolidate fstatfs implementations 2021-02-11 07:58:31 -03:00
fstatvfs.c linux: Consolidate internal_statvfs 2021-02-11 08:00:48 -03:00
fstatvfs64.c linux: Consolidate internal_statvfs 2021-02-11 08:00:48 -03:00
fsync.c
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ftime.c
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ftruncate.c
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ftruncate64.c
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futimens.c
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futimes.c
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futimesat.c
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fxstat.c
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fxstat64.c
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fxstatat.c
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fxstatat64.c
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gai_sigqueue.c
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gen-syscall-h.awk
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gentempfd.c
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getclktck.c
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getcpu.c
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getcwd.c
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getdents.c
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getdents64.c
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getdirentries.c
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getdirentries64.c
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getdtsz.c
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getentropy.c
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gethostid.c
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getipv4sourcefilter.c
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getitimer.c
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getloadavg.c
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getlogin.c
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getlogin_r.c
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getpagesize.c
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getpeername.c
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getpriority.c
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getpt.c
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getrandom.c
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getrlimit.c
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getrlimit64.c
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getrusage.c
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getsockname.c
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getsockopt.c
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getsourcefilter.c
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getsourcefilter.h
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getsysstats.c
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gettimeofday.c
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glibcsyscalls.py
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glob-lstat-compat.c
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glob.c
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glob64-lstat-compat.c
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glob64.c
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globfree.c
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globfree64.c
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grantpt.c
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if_index.c
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ifaddrs.c
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ifreq.c
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internal-signals.h
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internal_statvfs.c linux: Consolidate internal_statvfs 2021-02-11 08:00:48 -03:00
internal_statvfs.h linux: Consolidate internal_statvfs 2021-02-11 08:00:48 -03:00
ipc_ops.h
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ipc_priv.h
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kernel-features.h
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kernel-posix-cpu-timers.h
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kernel-posix-timers.h
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kernel_sigaction.h
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kernel_stat.h linux: Set default kernel_stat.h to LFS 2021-02-11 07:58:05 -03:00
kernel_termios.h
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kstat_cp.h
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ldd-rewrite.sed
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lddlibc4.c
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ldsodefs.h
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libc-vdso.h
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libc_fatal.c
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linux_fsinfo.h
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listen.c
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local-setxid.h
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lseek.c
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lseek64.c
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lstat.c
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lstat64.c
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lutimes.c
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lxstat.c
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lxstat64.c
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malloc-sysdep.h
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mknodat.c
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mlock2.c
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mmap.c
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mmap64.c
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mmap_internal.h
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mq_close.c
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mq_getattr.c
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mq_notify.c
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mq_open.c
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mq_receive.c
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mq_send.c
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mq_timedreceive.c
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mq_timedsend.c
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mq_unlink.c
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msgctl.c
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msgget.c
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msgrcv.c
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msgsnd.c
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msync.c
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mtx_timedlock.c
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nanosleep.c
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netlink_assert_response.c
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netlinkaccess.h
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nice.c
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not-cancel.h
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not-errno.h
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nscd_setup_thread.c
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ntp_gettime.c
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ntp_gettimex.c
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olddirent.h
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oldglob.c
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open.c
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open64.c
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open64_nocancel.c
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open_by_handle_at.c
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open_nocancel.c
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openat.c
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openat64.c
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openat64_nocancel.c
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openat_nocancel.c
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opendir.c
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opensock.c
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pathconf.c
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pathconf.h
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paths.h
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pause.c
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personality.c
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pkey_get.c
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pkey_mprotect.c
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pkey_set.c
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poll.c
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posix_fadvise.c
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posix_fadvise64.c
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posix_fallocate.c
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posix_fallocate64.c
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posix_madvise.c
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ppoll.c
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prctl.c
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pread.c
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pread64.c
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pread64_nocancel.c
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preadv.c
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preadv2.c
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preadv64.c
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preadv64v2.c
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prlimit.c
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process_vm_readv.c
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process_vm_writev.c
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prof-freq.c
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profil-counter.h
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profil.c
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pselect.c
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pselect32.c
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pt-raise.c
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pthread-pids.h
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pthread_getcpuclockid.c
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pthread_kill.c
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pthread_sigqueue.c
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ptrace.c
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ptsname.c
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pwrite.c
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pwrite64.c
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pwritev.c
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pwritev2.c
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pwritev64.c
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pwritev64v2.c
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raise.c
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read.c
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read_nocancel.c
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readahead.c
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readdir.c
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readdir64.c
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readdir64_r.c
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readdir_r.c
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readonly-area.c
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readv.c
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reboot.c
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recv.c
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recvfrom.c
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recvmmsg.c
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recvmsg.c
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remove.c
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rename.c
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renameat.c
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renameat2.c
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rewinddir.c
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sa_len.c
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safe-fatal.h
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scandir64.c
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sched_getaffinity.c
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sched_getcpu.c
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sched_rr_gi.c
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sched_setaffinity.c
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seekdir.c
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segfault.c
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select.c
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semctl.c
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semget.c
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semop.c
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semtimedop.c
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send.c
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sendmmsg.c
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sendmsg.c
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sendto.c
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setegid.c
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seteuid.c
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setgid.c
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setgroups.c
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sethostid.c
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setipv4sourcefilter.c
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setitimer.c
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setregid.c
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setresgid.c
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setresuid.c
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setreuid.c
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setrlimit.c
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setrlimit64.c
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setsockopt.c
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setsourcefilter.c
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settimeofday.c
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settimezone.c
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setuid.c
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shlib-versions
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shmat.c
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shmctl.c
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shmdt.c
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shmget.c
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shutdown.c
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sigaction.c
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siglist-compat.c
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signal.c
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signalfd.c
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sigpending.c
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sigprocmask.c
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sigqueue.c
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sigreturn.c
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sigset-cvt-mask.h
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sigsetops.h
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sigstack.c
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sigsuspend.c
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sigtimedwait.c
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sigwait.c
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sigwaitinfo.c
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single-thread.h
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sizes.h
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socket.c
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socketcall.h
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socketpair.c
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spawni.c
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speed.c
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splice.c
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stat.c
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stat64.c
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stat_t64_cp.c
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stat_t64_cp.h
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statfs.c linux: Consolidate statfs implementations 2021-02-11 08:00:11 -03:00
statfs64.c linux: Consolidate statfs implementations 2021-02-11 08:00:11 -03:00
statvfs.c linux: Consolidate internal_statvfs 2021-02-11 08:00:48 -03:00
statvfs64.c linux: Consolidate internal_statvfs 2021-02-11 08:00:48 -03:00
statx.c
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statx_cp.c
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statx_cp.h
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struct_kernel_msqid64_ds.h
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struct_kernel_semid64_ds.h
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struct_kernel_shmid64_ds.h
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struct_stat_time64.h
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sync_file_range.c
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syscall-names.list Update syscall lists for Linux 5.11. 2021-02-19 21:16:27 +00:00
syscalls.list
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sysconf-sigstksz.h sysconf: Add _SC_MINSIGSTKSZ/_SC_SIGSTKSZ [BZ #20305] 2021-02-01 11:00:52 -08:00
sysconf.c sysconf: Add _SC_MINSIGSTKSZ/_SC_SIGSTKSZ [BZ #20305] 2021-02-01 11:00:52 -08:00
sysctl.c
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sysdep-cancel.h
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sysdep-vdso.h
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sysdep.h
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syslog.c
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tcdrain.c
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tcflow.c
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tcflush.c
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tcgetattr.c
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tcgetpgrp.c
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tcsendbrk.c
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tcsetattr.c
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tcsetpgrp.c
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tee.c
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telldir.c
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termio.h
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test-errno-linux.c
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thrd_priv.h
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thrd_sleep.c
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time-clockid.h
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time.c
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time64-support.c
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time64-support.h
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timer_create.c
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timer_delete.c
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timer_getoverr.c
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timer_gettime.c
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timer_routines.c
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timer_settime.c
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timerfd_gettime.c
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timerfd_settime.c
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times.c
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timespec_get.c
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tls-internal.c
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tls-internal.h
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truncate.c
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truncate64.c
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tst-affinity-pid.c
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tst-affinity-static.c
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tst-affinity.c
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tst-align-clone.c
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tst-clone.c
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tst-clone2.c
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tst-clone3.c
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tst-fallocate-common.c
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tst-fallocate.c
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tst-fallocate64.c
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tst-fanotify.c
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tst-getdents64.c linux: mips: Fix getdents64 fallback on mips64-n32 2021-01-22 15:44:41 -03:00
tst-getpid1.c
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tst-gettid-kill.c
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tst-gettid.c
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tst-glibcsyscalls.py
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tst-memfd_create.c
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tst-mlock2.c
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tst-mman-consts.py
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tst-o_path-locks.c
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tst-ofdlocks-compat.c
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tst-ofdlocks.c
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tst-personality.c
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tst-pkey.c
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tst-ppoll.c tst: Provide test for ppoll 2021-02-08 09:20:03 +01:00
tst-quota.c
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tst-readdir64-compat.c
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tst-rlimit-infinity.c
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tst-sigcontext-get_pc.c
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tst-signal-numbers.py
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tst-skeleton-affinity.c
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tst-skeleton-thread-affinity.c
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tst-socket-consts.py
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tst-sync_file_range.c
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tst-syscall-list.sh
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tst-sysconf-iov_max-uapi.c
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tst-sysconf-iov_max.c
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tst-sysvmsg-linux.c
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tst-sysvsem-linux.c
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tst-sysvshm-linux.c linux: Remove shmmax check from tst-sysvshm-linux 2021-02-02 11:20:42 -03:00
tst-tgkill.c
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tst-timerfd.c tst: Provide test for timerfd related functions 2021-02-08 09:19:44 +01:00
tst-ttyname.c
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ttyname.c
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ttyname.h
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ttyname_r.c
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tv32-compat.h
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ualarm.c
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umount.c
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umount2.c
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unlockpt.c
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update-syscall-lists.py
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updwtmp.c
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ustat.c
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utime.c
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utimensat.c
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utimes.c
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utmp_file.c
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versionsort64.c
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vfork.c
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vmsplice.c
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wait3.c
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wait4.c
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waitid.c
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write.c
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write_nocancel.c
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writev.c
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xmknod.c
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xmknodat.c
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xstat.c
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xstat64.c
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xstatconv.c linux: Set default kernel_stat.h to LFS 2021-02-11 07:58:05 -03:00
xstatconv.h
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xstatover.h
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xstatver.h
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