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
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__cancel_jmp_buf_tag.h	Linux/x86: Update cancel_jmp_buf to match __jmp_buf_tag [BZ #22563]	2017-12-19 02:44:04 -08:00
__sigset_t.h	Remove __need macros from signal.h.	2017-05-20 19:04:43 -04:00
sigevent_t.h	Fix sigval namespace (bug 21944).	2017-08-16 20:33:59 +00:00
siginfo_t.h	Fix sigval namespace (bug 21944).	2017-08-16 20:33:59 +00:00
stack_t.h	Fix struct sigaltstack namespace (bug 21517).	2017-06-05 10:17:46 +00:00