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
..
armv6	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
armv6t2	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
armv7	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
be	arm: Fix softp-fp Implies (BZ #25635)	2020-03-06 09:53:24 -03:00
bits	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
include/bits	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
le	arm: Fix softp-fp Implies (BZ #25635)	2020-03-06 09:53:24 -03:00
nofpu	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
nptl	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
sys	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
__longjmp.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
add_n.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
addmul_1.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_assert.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_atexit.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_errno_addr.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_lcsts.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_localeconv.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_math.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_mb_cur_max.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_memclr.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_memcpy.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_memmove.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_memset.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_sighandlers.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
aeabi_unwind_cpp_pr1.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
arm-features.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
arm-ifunc.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
arm-mcount.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
arm-unwind-resume.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
atomic-machine.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
backtrace.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
bsd-_setjmp.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
bsd-setjmp.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
configure	Remove configure test for ARM TLS descriptors support.	2015-10-27 23:56:50 +00:00
configure.ac	Remove configure test for ARM TLS descriptors support.	2015-10-27 23:56:50 +00:00
crti.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
crtn.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
dl-irel.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
dl-lookupcfg.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
dl-machine.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
dl-sysdep.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
dl-tls.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
dl-tlsdesc.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
dl-tlsdesc.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
dl-trampoline.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
elf-initfini.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fclrexcpt.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fedisblxcpt.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
feenablxcpt.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fegetenv.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fegetexcept.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fegetmode.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fegetround.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
feholdexcpt.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fenv_private.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fesetenv.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fesetexcept.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fesetmode.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fesetround.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
feupdateenv.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fgetexcptflg.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
find_exidx.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fix-fp-int-convert-overflow.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fpu_control.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
fraiseexcpt.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
framestate.c
fsetexcptflg.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
ftestexcept.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
gcc-compat.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
gccframe.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
get-rounding-mode.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
Implies	Remove sysdeps/arm/soft-fp directory.	2014-10-16 09:54:45 -07:00
jmpbuf-unwind.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
ldbl-classify-compat.h	Move LDBL_CLASSIFY_COMPAT to its own header.	2018-02-01 21:01:00 +00:00
ldsodefs.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
libc-aeabi_read_tp.S	ARM: Move more aeabi routine magic out of Linux-specific directories	2014-06-26 15:08:29 -07:00
libc-tls.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
libm-test-ulps	Update arm libm-test-ulps.	2021-01-18 20:22:51 +00:00
libm-test-ulps-name	Do not hardcode platform names in manual/libm-err-tab.pl (bug 14139).	2016-11-04 16:49:06 +00:00
linkmap.h	Rename bits/linkmap.h to linkmap.h (bug 14912).	2015-09-04 19:44:27 +00:00
machine-gmon.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
Makefile	arm: remove string/tst-memmove-overflow XFAIL	2020-07-16 06:56:52 +02:00
math-tests-trap.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
math-use-builtins-sqrt.h	arm: Use sqrt{f} builtin	2020-06-22 11:09:50 -03:00
memcpy.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
memmove.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
memset.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
memusage.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
nptl-aeabi_unwind_cpp_pr1.c	ARM: Move more aeabi routine magic out of Linux-specific directories	2014-06-26 15:08:29 -07:00
preconfigure	arm: Split BE/LE abilist	2019-08-29 09:58:21 -03:00
preconfigure.ac	arm: Split BE/LE abilist	2019-08-29 09:58:21 -03:00
pt-arm-unwind-resume.S	ARM: Consolidate with generic unwinder wrapper code	2015-01-05 15:42:16 -08:00
rt-aeabi_unwind_cpp_pr1.c	ARM: Move more aeabi routine magic out of Linux-specific directories	2014-06-26 15:08:29 -07:00
rt-arm-unwind-resume.S	ARM: Consolidate with generic unwinder wrapper code	2015-01-05 15:42:16 -08:00
rtld-global-offsets.sym
setfpucw.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
setjmp.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
sfp-machine.h	Remove sysdeps/arm/soft-fp directory.	2014-10-16 09:54:45 -07:00
sotruss-lib.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
stackinfo.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
stap-probe-machine.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
start.S	Reduce the statically linked startup code [BZ #23323]	2021-02-25 12:13:02 +01:00
static-stubs.c
strlen.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
sub_n.S
submul_1.S	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
sysdep.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
test-fpucw.c
tls-macros.h	ARM: Rewrite sysdeps/arm/tls-macros.h	2015-03-13 10:10:09 -07:00
tlsdesc.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
tlsdesc.sym
tst-armtlsdescextlazy.c	[BZ #17075] ARM: Fix immediate calculation of R_ARM_TLS_DESC	2014-06-20 20:22:42 +01:00
tst-armtlsdescextlazymod.c	[BZ #17075] ARM: Fix immediate calculation of R_ARM_TLS_DESC	2014-06-20 20:22:42 +01:00
tst-armtlsdescextnow.c	[BZ #17075] ARM: Fix immediate calculation of R_ARM_TLS_DESC	2014-06-20 20:22:42 +01:00
tst-armtlsdescextnowmod.c	[BZ #17075] ARM: Fix immediate calculation of R_ARM_TLS_DESC	2014-06-20 20:22:42 +01:00
tst-armtlsdescloc.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
tst-armtlsdesclocmod.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
tst-audit.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
unwind-dw2-fde-glibc.c	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
unwind-pe.c
unwind-resume.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
unwind.h	Update copyright dates with scripts/update-copyrights	2021-01-02 12:17:34 -08:00
Versions	Use -Werror=undef for assembly code.	2015-02-12 13:57:32 -08:00