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| author | Richard Earnshaw <Richard.Earnshaw@arm.com> | 2020-12-21 15:03:03 +0000 |
|---|---|---|
| committer | Richard Earnshaw <rearnsha@arm.com> | 2020-12-21 15:25:25 +0000 |
| commit | 3378408987189772eec7bc62fc9923a6f01dc63c (patch) | |
| tree | 91852b072e2b766bfc63ab738424c70d3ee92d3d /INSTALL | |
| parent | d552058570ea2c00fb88b4621be3285cda03033f (diff) | |
| download | glibc-3378408987189772eec7bc62fc9923a6f01dc63c.tar.gz glibc-3378408987189772eec7bc62fc9923a6f01dc63c.tar.xz glibc-3378408987189772eec7bc62fc9923a6f01dc63c.zip | |
config: Allow memory tagging to be enabled when configuring glibc
This patch adds the configuration machinery to allow memory tagging to be enabled from the command line via the configure option --enable-memory-tagging. The current default is off, though in time we may change that once the API is more stable.
Diffstat (limited to 'INSTALL')
| -rw-r--r-- | INSTALL | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/INSTALL b/INSTALL index accdc39821..de75e72760 100644 --- a/INSTALL +++ b/INSTALL @@ -142,6 +142,20 @@ if 'CFLAGS' is specified it must enable optimization. For example: non-CET processors. '--enable-cet' has been tested for i686, x86_64 and x32 on CET processors. +'--enable-memory-tagging' + Enable memory tagging support if the architecture supports it. + When the GNU C Library is built with this option then the resulting + library will be able to control the use of tagged memory when + hardware support is present by use of the tunable + 'glibc.mem.tagging'. This includes the generation of tagged memory + when using the 'malloc' APIs. + + At present only AArch64 platforms with MTE provide this + functionality, although the library will still operate (without + memory tagging) on older versions of the architecture. + + The default is to disable support for memory tagging. + '--disable-profile' Don't build libraries with profiling information. You may want to use this option if you don't plan to do profiling. |