H.J. Lu 8d81ce0c6d Properly compute offsets of note descriptor and next note [BZ #22370] ... A note header has 3 4-bytes fields, followed by note name and note descriptor. According to gABI, in a note entry, the note name field, not note name size, is padded for the note descriptor. And the note descriptor field, not note descriptor size, is padded for the next note entry. Notes are aligned to 4 bytes in 32-bit objects and 8 bytes in 64-bit objects. For all GNU notes, the name is "GNU" which is 4 bytes. They have the same format in the first 16 bytes in both 32-bit and 64-bit objects. They differ by note descriptor size and note type. So far, .note.ABI-tag and .note.gnu.build-id notes are always aligned to 4 bytes. The exsting codes compute the note size by aligning the note name size and note descriptor size to 4 bytes. It happens to produce the same value as the actual note size by luck since the name size is 4 and offset of the note descriptor is 16. But it will produce the wrong size when note alignment is 8 bytes in 64-bit objects. This patch defines ELF_NOTE_DESC_OFFSET and ELF_NOTE_NEXT_OFFSET to properly compute offsets of note descriptor and next note. It uses alignment of PT_NOTE segment to support both 4-byte and 8-byte note alignments in 64-bit objects. To handle PT_NOTE segments with incorrect alignment, which may lead to an infinite loop, if segment alignment is less than 4, we treate alignment as 4 bytes since some note segments have 0 or 1 byte alignment. [BZ #22370] * elf/dl-hwcaps.c (ROUND): Removed. (_dl_important_hwcaps): Replace ROUND with ELF_NOTE_DESC_OFFSET and ELF_NOTE_NEXT_OFFSET. * elf/dl-load.c (ROUND): Removed. (open_verify): Replace ROUND with ELF_NOTE_NEXT_OFFSET. * elf/readelflib.c (ROUND): Removed. (process_elf_file): Replace ROUND with ELF_NOTE_NEXT_OFFSET. * include/elf.h [!_ISOMAC]: Include <libc-pointer-arith.h>. [!_ISOMAC] (ELF_NOTE_DESC_OFFSET): New. [!_ISOMAC] (ELF_NOTE_NEXT_OFFSET): Likewise.		2017-11-28 09:57:00 -08:00
..
arpa	nss_dns: Replace local declarations with declarations from a header file	2017-04-04 20:56:23 +02:00
bits	Fix sigval namespace (bug 21944).	2017-08-16 20:33:59 +00:00
gnu	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
net
netinet	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
programs	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
protocols
rpc	Mark internal rpc functions with attribute_hidden [BZ #18822]	2017-10-01 15:55:15 -07:00
rpcsvc	Deprecate libnsl by default (only shared library will be	2017-03-21 15:14:27 +01:00
sys	Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN	2017-10-03 01:33:38 +02:00
aio.h
aliases.h	Mark internal getXXXbyYYY functions with attribute_hidden [BZ #18822]	2017-10-01 15:21:00 -07:00
alloc_buffer.h	Replace "if if " with "if " in comments	2017-10-25 08:05:51 -07:00
alloca.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
argp-fmtstream.h	Mark internal argp functions with attribute_hidden [BZ #18822]	2017-10-01 15:10:27 -07:00
argp.h	Mark internal argp functions with attribute_hidden [BZ #18822]	2017-10-01 15:10:27 -07:00
argz.h	Mark internal argz functions with attribute_hidden [BZ #18822]	2017-08-18 09:31:33 -07:00
array_length.h	<array_length.h>: New array_length and array_end macros	2017-11-02 12:45:20 +01:00
assert.h	Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN	2017-10-03 01:33:38 +02:00
atomic.h	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
byteswap.h
caller.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
complex.h	float128: Add private _Float128 declarations for libm.	2017-05-15 10:23:28 -03:00
cpio.h
crypt.h	Add include/crypt.h.	2016-10-28 22:40:16 -04:00
ctype.h
des.h
dirent.h	Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN	2017-10-03 01:33:38 +02:00
dlfcn.h	Mark internal functions with attribute_hidden [BZ #18822]	2017-10-01 15:07:23 -07:00
dso_handle.h	Mark __dso_handle as hidden [BZ #18822]	2017-09-26 16:53:44 -07:00
elf.h	Properly compute offsets of note descriptor and next note [BZ #22370]	2017-11-28 09:57:00 -08:00
endian.h
envz.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
err.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
errno.h	Remove __need macros from errno.h (__need_Emath, __need_error_t).	2017-06-14 08:14:34 -04:00
error.h
execinfo.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
fcntl.h	Consolidate remaning non cancellable definitions	2017-08-23 10:47:03 -03:00
features.h	Ensure C99 and C11 interfaces are available for C++ [BZ #21326]	2017-10-09 16:18:11 +02:00
fenv.h
float.h	Handle more _FloatN, _FloatNx types in include/float.h.	2017-11-07 23:49:04 +00:00
fmtmsg.h
fnmatch.h
fpu_control.h	Hide internal __setfpucw function [BZ #18822]	2017-10-01 17:52:15 -07:00
ftw.h
gconv.h
getopt_int.h
getopt.h	getopt: remove USE_NONOPTION_FLAGS	2017-04-07 07:45:53 -04:00
glob.h	Hide internal __glob64 function [BZ #18822]	2017-10-01 18:02:10 -07:00
gmp.h	Mark internal gmp functions with attribute_hidden [BZ #18822]	2017-10-01 15:15:30 -07:00
gnu-versions.h	posix: Add compat glob symbol to not follow dangling symbols	2017-09-25 18:04:16 -07:00
grp-merge.h	NSS: Implement group merging support.	2016-04-29 22:18:21 -04:00
grp.h	Mark internal grp/pwd/shadow functions with attribute_hidden [BZ #18822]	2017-10-01 15:13:13 -07:00
gshadow.h	Mark internal gshadow functions with attribute_hidden [BZ #18822]	2017-10-01 15:19:17 -07:00
iconv.h
idna.h	Hide internal idna functions [BZ #18822]	2017-10-01 17:33:22 -07:00
ifaddrs.h	hurd: Fix getifaddrs' and freeifaddrs' symbol exposition	2017-09-28 01:05:18 +02:00
ifreq.h	Hide internal __ifreq function [BZ #18822]	2017-10-01 17:35:46 -07:00
ifunc-impl-list.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
inline-hashtab.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
langinfo.h
libc-diag.h	Split DIAG_* macros to new header libc-diag.h.	2017-02-25 09:59:46 -05:00
libc-internal.h	Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN	2017-10-03 01:33:38 +02:00
libc-pointer-arith.h	Narrowing the visibility of libc-internal.h even further.	2017-03-01 20:33:46 -05:00
libc-symbols.h	Don't use hidden visibility in libc.a with PIE on i386	2017-10-04 17:18:42 -07:00
libgen.h
libintl.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
libio.h	Remove _IO_MTSAFE_IO from public headers.	2017-05-11 19:14:11 -04:00
limits.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
link.h	ld.so: Add architecture specific fields	2017-11-13 08:02:52 -08:00
list_t.h	Remove __need_list_t and __need_res_state.	2017-05-20 19:01:46 -04:00
list.h	Remove __need_list_t and __need_res_state.	2017-05-20 19:01:46 -04:00
locale.h
malloc.h	Hide internal __malloc_check_init function [BZ #18822]	2017-10-01 16:00:36 -07:00
math.h	Remove _Mlong_double_ etc. macros.	2017-10-30 20:58:51 +00:00
mcheck.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
memory.h
mntent.h	Hide internal __hasmntopt function [BZ #18822]	2017-10-01 17:37:42 -07:00
monetary.h	Hide internal __vstrfmon_l function [BZ #18822]	2017-10-01 17:45:07 -07:00
mqueue.h
netdb.h	Mark internal getXXXbyYYY functions with attribute_hidden [BZ #18822]	2017-10-01 15:21:00 -07:00
netgroup.h
nl_types.h
nss.h	nss: Export nscd hash function as __nss_hash [BZ #22459]	2017-11-23 14:08:11 +01:00
nsswitch.h
obstack.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
plural-exp.h	Hide internal __gettextparse function [BZ #18822]	2017-10-01 17:31:05 -07:00
poll.h
printf.h	Hide internal printf functions [BZ #18822/21986]	2017-08-22 07:50:57 -07:00
pthread.h
pty.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
pwd.h	Mark internal grp/pwd/shadow functions with attribute_hidden [BZ #18822]	2017-10-01 15:13:13 -07:00
regex.h	Hide internal regex functions [BZ #18822]	2017-10-01 15:53:15 -07:00
resolv.h	Obsolete p_secstodate.	2017-11-22 22:21:10 +00:00
rounding-mode.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
sched.h	Hide internal __sched_setparam function [BZ #18822]	2017-10-01 17:43:25 -07:00
scratch_buffer.h	scratch_buffer: use union for internal buffer	2017-09-25 18:04:22 -07:00
search.h	Hide internal __tdestroy function [BZ #18822]	2017-10-01 16:06:58 -07:00
set-hooks.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
setjmp.h	Add jmp_buf-macros.h	2017-11-09 05:10:03 -08:00
sgtty.h
shadow.h	Mark internal grp/pwd/shadow functions with attribute_hidden [BZ #18822]	2017-10-01 15:13:13 -07:00
shlib-compat.h	shlib-compat: Update documentation of the compat_symbol_reference macro	2017-10-16 20:43:28 +02:00
signal.h	Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN	2017-10-03 01:33:38 +02:00
spawn.h
stab.h
stackinfo.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
stap-probe.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
stdc-predef.h	Bug 21533: Update to Unicode 10.0.0	2017-06-22 17:02:55 +02:00
stdio_ext.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
stdio.h	Mark internal stdio functions with attribute_hidden [BZ #18822]	2017-10-01 15:20:13 -07:00
stdlib.h	Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN	2017-10-03 01:33:38 +02:00
string.h	Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN	2017-10-03 01:33:38 +02:00
strings.h
stropts.h
stubs-prologue.h
syscall.h
sysexits.h
syslog.h
tar.h
termios.h	Hide internal __tcgetattr function [BZ #18822]	2017-10-01 17:48:24 -07:00
tgmath.h
time.h	Mark internal time functions with attribute_hidden [BZ #18822]	2017-10-01 15:17:32 -07:00
ttyent.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
uchar.h
ucontext.h
ulimit.h
unistd.h	Mark internal unistd functions with attribute_hidden [BZ #18822]	2017-10-01 15:12:04 -07:00
utime.h
utmp.h	Mark internal utmp functions with attribute_hidden [BZ #18822]	2017-10-01 15:51:56 -07:00
values.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
wchar.h	Remove attribute_hidden for wchar ifunc symbols.	2017-11-21 08:43:23 +01:00
wctype.h	Remove __need macros from stdio.h and wchar.h.	2017-06-08 13:58:17 -04:00
wordexp.h