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394df3815e
CET arch_prctl bits should be defined in <asm/prctl.h> from Linux kernel
header files. Add x86 <include/asm/prctl.h> for pre-CET kernel header
files.
Note: sysdeps/unix/sysv/linux/x86/include/asm/prctl.h should be removed
if <asm/prctl.h> from the required kernel header files contains CET
arch_prctl bits.
/* CET features:
IBT: GNU_PROPERTY_X86_FEATURE_1_IBT
SHSTK: GNU_PROPERTY_X86_FEATURE_1_SHSTK
*/
/* Return CET features in unsigned long long *addr:
features: addr[0].
shadow stack base address: addr[1].
shadow stack size: addr[2].
*/
# define ARCH_CET_STATUS 0x3001
/* Disable CET features in unsigned int features. */
# define ARCH_CET_DISABLE 0x3002
/* Lock all CET features. */
# define ARCH_CET_LOCK 0x3003
/* Allocate a new shadow stack with unsigned long long *addr:
IN: requested shadow stack size: *addr.
OUT: allocated shadow stack address: *addr.
*/
# define ARCH_CET_ALLOC_SHSTK 0x3004
/* Return legacy region bitmap info in unsigned long long *addr:
address: addr[0].
size: addr[1].
*/
# define ARCH_CET_LEGACY_BITMAP 0x3005
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* sysdeps/unix/sysv/linux/x86/include/asm/prctl.h: New file.
* sysdeps/unix/sysv/linux/x86/cpu-features.c: Include
<sys/prctl.h> and <asm/prctl.h>.
(get_cet_status): Call arch_prctl with ARCH_CET_STATUS.
* sysdeps/unix/sysv/linux/x86/dl-cet.h: Include <sys/prctl.h>
and <asm/prctl.h>.
(dl_cet_allocate_legacy_bitmap): Call arch_prctl with
ARCH_CET_LEGACY_BITMAP.
(dl_cet_disable_cet): Call arch_prctl with ARCH_CET_DISABLE.
(dl_cet_lock_cet): Call arch_prctl with ARCH_CET_LOCK.
* sysdeps/x86/libc-start.c: Include <startup.h>.
33 lines
1.0 KiB
C
33 lines
1.0 KiB
C
/* FIXME: CET arch_prctl bits should come from the kernel header files.
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This file should be removed if <asm/prctl.h> from the required kernel
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header files contains CET arch_prctl bits. */
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#include_next <asm/prctl.h>
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#ifndef ARCH_CET_STATUS
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/* CET features:
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IBT: GNU_PROPERTY_X86_FEATURE_1_IBT
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SHSTK: GNU_PROPERTY_X86_FEATURE_1_SHSTK
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*/
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/* Return CET features in unsigned long long *addr:
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features: addr[0].
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shadow stack base address: addr[1].
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shadow stack size: addr[2].
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*/
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# define ARCH_CET_STATUS 0x3001
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/* Disable CET features in unsigned int features. */
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# define ARCH_CET_DISABLE 0x3002
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/* Lock all CET features. */
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# define ARCH_CET_LOCK 0x3003
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/* Allocate a new shadow stack with unsigned long long *addr:
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IN: requested shadow stack size: *addr.
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OUT: allocated shadow stack address: *addr.
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*/
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# define ARCH_CET_ALLOC_SHSTK 0x3004
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/* Return legacy region bitmap info in unsigned long long *addr:
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address: addr[0].
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size: addr[1].
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*/
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# define ARCH_CET_LEGACY_BITMAP 0x3005
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#endif /* ARCH_CET_STATUS */
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