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| author | H.J. Lu <hjl.tools@gmail.com> | 2024-01-03 12:09:23 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2024-01-04 06:08:55 -0800 |
| commit | bbfb54930cdd85269504a34b362e77a3ac2a207a (patch) | |
| tree | 1e6790858eae27d2762760ca2a3315db2afa8f17 /INSTALL | |
| parent | 0d4a2f3576ebd92ca0001645a533bf70289f264e (diff) | |
| download | glibc-bbfb54930cdd85269504a34b362e77a3ac2a207a.tar.gz glibc-bbfb54930cdd85269504a34b362e77a3ac2a207a.tar.xz glibc-bbfb54930cdd85269504a34b362e77a3ac2a207a.zip | |
i386: Ignore --enable-cet
Since shadow stack is only supported for x86-64, ignore --enable-cet for i386. Always setting $(enable-cet) for i386 to "no" to support ifneq ($(enable-cet),no) in x86 Makefiles. We can't use ifeq ($(enable-cet),yes) since $(enable-cet) can be "yes", "no" or "permissive". Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'INSTALL')
| -rw-r--r-- | INSTALL | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/INSTALL b/INSTALL index afd88dc5b1..be3697c62f 100644 --- a/INSTALL +++ b/INSTALL @@ -141,17 +141,14 @@ if ‘CFLAGS’ is specified it must enable optimization. For example: indirect branch tracking (IBT) and shadow stack (SHSTK). When CET is enabled, the GNU C Library is compatible with all existing executables and shared libraries. This feature is currently - supported on i386, x86_64 and x32 with GCC 8 and binutils 2.29 or - later. Note that when CET is enabled, the GNU C Library requires - CPUs capable of multi-byte NOPs, like x86-64 processors as well as - Intel Pentium Pro or newer. With ‘--enable-cet’, it is an error to - dlopen a non CET enabled shared library in CET enabled application. - With ‘--enable-cet=permissive’, CET is disabled when dlopening a - non CET enabled shared library in CET enabled application. - - NOTE: ‘--enable-cet’ has been tested for i686, x86_64 and x32 on - non-CET processors. ‘--enable-cet’ has been tested for i686, - x86_64 and x32 on CET processors. + supported on x86_64 and x32 with GCC 8 and binutils 2.29 or later. + With ‘--enable-cet’, it is an error to dlopen a non CET enabled + shared library in CET enabled application. With + ‘--enable-cet=permissive’, CET is disabled when dlopening a non CET + enabled shared library in CET enabled application. + + NOTE: ‘--enable-cet’ has been tested for x86_64 and x32 on non-CET + and CET processors. ‘--enable-memory-tagging’ Enable memory tagging support if the architecture supports it. |