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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 /manual/install.texi | |
| 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 'manual/install.texi')
| -rw-r--r-- | manual/install.texi | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/manual/install.texi b/manual/install.texi index 648f366371..8f26bb2a81 100644 --- a/manual/install.texi +++ b/manual/install.texi @@ -171,6 +171,19 @@ NOTE: @option{--enable-cet} has been tested for i686, x86_64 and x32 on non-CET processors. @option{--enable-cet} has been tested for i686, x86_64 and x32 on CET processors. +@item --enable-memory-tagging +Enable memory tagging support if the architecture supports it. When +@theglibc{} 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 @samp{glibc.mem.tagging}. This includes +the generation of tagged memory when using the @code{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. + @item --disable-profile Don't build libraries with profiling information. You may want to use this option if you don't plan to do profiling. |