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f81ddabffd
glibc/sysdeps
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H.J. Lu f81ddabffd Linux/x86: Update cancel_jmp_buf to match __jmp_buf_tag [BZ #22563] 
On x86, padding in struct __jmp_buf_tag is used for shadow stack pointer
to support shadow stack in Intel Control-flow Enforcemen Technology.
Since the cancel_jmp_buf array is passed to setjmp and longjmp by
casting it to pointer to struct __jmp_buf_tag, it should be as large
as struct __jmp_buf_tag.  Otherwise when shadow stack is enabled,
setjmp and longjmp will write and read beyond cancel_jmp_buf when saving
and restoring shadow stack pointer.

This patch adds bits/types/__cancel_jmp_buf_tag.h to define struct
__cancel_jmp_buf_tag so that Linux/x86 can add saved_mask to
cancel_jmp_buf.

Tested natively on i386, x86_64 and x32.  Tested hppa-linux-gnu with
build-many-glibcs.py.

	[BZ #22563]
	* bits/types/__cancel_jmp_buf_tag.h: New file.
	* sysdeps/unix/sysv/linux/x86/bits/types/__cancel_jmp_buf_tag.h
	* sysdeps/unix/sysv/linux/x86/pthreaddef.h: Likewise.
	* sysdeps/unix/sysv/linux/x86/nptl/pthreadP.h: Likewise.
	* nptl/Makefile (headers): Add
	bits/types/__cancel_jmp_buf_tag.h.
	* nptl/descr.h [NEED_SAVED_MASK_IN_CANCEL_JMP_BUF]
	(pthread_unwind_buf): Add saved_mask to cancel_jmp_buf.
	* sysdeps/nptl/pthread.h: Include
	<bits/types/__cancel_jmp_buf_tag.h>.
	(__pthread_unwind_buf_t): Use struct __cancel_jmp_buf_tag with
	__cancel_jmp_buf.
	* sysdeps/unix/sysv/linux/hppa/pthread.h: Likewise.
2017-12-19 02:44:04 -08:00
..
aarch64 aarch64: fix start code for static pie 2017-12-18 10:07:07 +00:00
alpha Update Alpha libm-test-ulps 2017-12-06 18:55:09 -02:00
arm Add sysdeps/ieee754/soft-fp. 2017-12-12 23:35:21 +00:00
generic ld.so: Examine GLRO to detect inactive loader [BZ #20204] 2017-12-18 20:04:13 +01:00
gnu The -Wstringop-truncation option new in GCC 8 detects common misuses 2017-11-15 17:39:59 -07:00
hppa Handle __gmon_start__ as undefined weak on hppa. 2017-12-02 14:43:28 -05:00
i386 Add --enable-static-pie configure option to build static PIE [BZ #19574] 2017-12-15 17:12:14 -08:00
ia64 Update IA64 libm-test-ulps 2017-12-12 16:57:41 -02:00
ieee754 New generic sincosf 2017-12-16 14:01:37 +05:30
init_array
m68k Fix m68k bits/mathinline.h attributes (bug 22631). 2017-12-19 02:02:26 +00:00
mach Don't set errno in Hurd rtld's __access_noerrno 2017-12-15 18:02:56 +01:00
microblaze Add sysdeps/ieee754/soft-fp. 2017-12-12 23:35:21 +00:00
mips mips32: fix clobbering s0 in setjmp() [BZ #22624] 2017-12-18 18:26:49 +00:00
nios2 Add sysdeps/ieee754/soft-fp. 2017-12-12 23:35:21 +00:00
nptl Linux/x86: Update cancel_jmp_buf to match __jmp_buf_tag [BZ #22563] 2017-12-19 02:44:04 -08:00
posix posix: Fix generic p{read,write}v buffer allocation (BZ#22457) 2017-11-24 12:16:15 -02:00
powerpc powerpc: Update ulps 2017-12-16 14:04:14 +05:30
pthread aio: Remove internal_function function attribute 2017-08-31 15:59:06 +02:00
s390 s390: Update ulps 2017-12-16 14:11:56 +05:30
sh Add sysdeps/ieee754/soft-fp. 2017-12-12 23:35:21 +00:00
sparc Update SPARC divrem generation to match output. 2017-12-15 14:06:07 +00:00
tile Add sysdeps/ieee754/soft-fp. 2017-12-12 23:35:21 +00:00
unix Linux/x86: Update cancel_jmp_buf to match __jmp_buf_tag [BZ #22563] 2017-12-19 02:44:04 -08:00
wordsize-32
wordsize-64 posix: Consolidate Linux glob implementation 2017-09-08 16:34:02 +02:00
x86 Add _Float64x function aliases. 2017-11-27 14:16:47 +00:00
x86_64 Add --enable-static-pie configure option to build static PIE [BZ #19574] 2017-12-15 17:12:14 -08:00