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| author | H.J. Lu <hjl.tools@gmail.com> | 2020-03-18 04:35:54 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2020-03-18 04:35:54 -0700 |
| commit | 1fabdb99084df004f7f4cdc7068d1be209a258be (patch) | |
| tree | 3d0bdb677e7bc8d6d1080d37604a1cf4b3253d21 /sysdeps/unix | |
| parent | 49348beafe9ba150c9bd48595b3f372299bddbb0 (diff) | |
| download | glibc-1fabdb99084df004f7f4cdc7068d1be209a258be.tar glibc-1fabdb99084df004f7f4cdc7068d1be209a258be.tar.gz glibc-1fabdb99084df004f7f4cdc7068d1be209a258be.tar.bz2 glibc-1fabdb99084df004f7f4cdc7068d1be209a258be.zip | |
x86: Remove ARCH_CET_LEGACY_BITMAP [BZ #25397]
Since legacy bitmap doesn't cover jitted code generated by legacy JIT
engine, it isn't very useful. This patch removes ARCH_CET_LEGACY_BITMAP
and treats indirect branch tracking similar to shadow stack by removing
legacy bitmap support.
Tested on CET Linux/x86-64 and non-CET Linux/x86-64.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86/dl-cet.h | 20 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86/include/asm/prctl.h | 5 |
2 files changed, 0 insertions, 25 deletions
diff --git a/sysdeps/unix/sysv/linux/x86/dl-cet.h b/sysdeps/unix/sysv/linux/x86/dl-cet.h index 9b2aaa238c..ae97a433a2 100644 --- a/sysdeps/unix/sysv/linux/x86/dl-cet.h +++ b/sysdeps/unix/sysv/linux/x86/dl-cet.h @@ -19,26 +19,6 @@ #include <asm/prctl.h> static inline int __attribute__ ((always_inline)) -dl_cet_allocate_legacy_bitmap (unsigned long *legacy_bitmap) -{ - /* Allocate legacy bitmap. */ -#ifdef __LP64__ - return (int) INTERNAL_SYSCALL_CALL (arch_prctl, - ARCH_CET_LEGACY_BITMAP, legacy_bitmap); -#else - unsigned long long legacy_bitmap_u64[2]; - int res = INTERNAL_SYSCALL_CALL (arch_prctl, - ARCH_CET_LEGACY_BITMAP, legacy_bitmap_u64); - if (res == 0) - { - legacy_bitmap[0] = legacy_bitmap_u64[0]; - legacy_bitmap[1] = legacy_bitmap_u64[1]; - } - return res; -#endif -} - -static inline int __attribute__ ((always_inline)) dl_cet_disable_cet (unsigned int cet_feature) { return (int) INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_CET_DISABLE, diff --git a/sysdeps/unix/sysv/linux/x86/include/asm/prctl.h b/sysdeps/unix/sysv/linux/x86/include/asm/prctl.h index f67f3299b9..45ad0b052f 100644 --- a/sysdeps/unix/sysv/linux/x86/include/asm/prctl.h +++ b/sysdeps/unix/sysv/linux/x86/include/asm/prctl.h @@ -24,9 +24,4 @@ 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 #endif /* ARCH_CET_STATUS */ |