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x86: Rename __glibc_reserved1 to feature_1 in tcbhead_t [BZ #22563]

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feature_1 has X86_FEATURE_1_IBT and X86_FEATURE_1_SHSTK bits for CET
run-time control.

CET_ENABLED, IBT_ENABLED and SHSTK_ENABLED are defined to 1 or 0 to
indicate that if CET, IBT and SHSTK are enabled.

<tls-setup.h> is added to set up thread-local data.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

	[BZ #22563]
	* nptl/pthread_create.c: Include <tls-setup.h>.
	(__pthread_create_2_1): Call tls_setup_tcbhead.
	* sysdeps/generic/tls-setup.h: New file.
	* sysdeps/x86/nptl/tls-setup.h: Likewise.
	* sysdeps/i386/nptl/tcb-offsets.sym (FEATURE_1_OFFSET): New.
	* sysdeps/x86_64/nptl/tcb-offsets.sym (FEATURE_1_OFFSET):
	Likewise.
	* sysdeps/i386/nptl/tls.h (tcbhead_t): Rename __glibc_reserved1
	to feature_1.
	* sysdeps/x86_64/nptl/tls.h (tcbhead_t): Likewise.
	* sysdeps/x86/sysdep.h (X86_FEATURE_1_IBT): New.
	(X86_FEATURE_1_SHSTK): Likewise.
	(CET_ENABLED): Likewise.
	(IBT_ENABLED): Likewise.
	(SHSTK_ENABLED): Likewise.
This commit is contained in:
H.J. Lu
2018-07-14 05:53:05 -07:00
parent 0a83bad2aa
commit ebff9c5cfa
9 changed files with 105 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
nptl/pthread_create.c
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@@ -32,6 +32,7 @@
#include <exit-thread.h>
#include <default-sched.h>
#include <futex-internal.h>
#include <tls-setup.h>
#include "libioP.h"
#include <shlib-compat.h>
@@ -712,6 +713,9 @@ __pthread_create_2_1 (pthread_t *newthread, const pthread_attr_t *attr,
THREAD_COPY_POINTER_GUARD (pd);
#endif
/* Setup tcbhead. */
tls_setup_tcbhead (pd);
/* Verify the sysinfo bits were copied in allocate_stack if needed. */
#ifdef NEED_DL_SYSINFO
CHECK_THREAD_SYSINFO (pd);