diff options
| -rw-r--r-- | INSTALL | 14 | ||||
| -rw-r--r-- | config.h.in | 3 | ||||
| -rw-r--r-- | config.make.in | 2 | ||||
| -rwxr-xr-x | configure | 22 | ||||
| -rw-r--r-- | configure.ac | 15 | ||||
| -rw-r--r-- | manual/install.texi | 13 |
6 files changed, 69 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. diff --git a/config.h.in b/config.h.in index b823c8e080..eca2d66a2c 100644 --- a/config.h.in +++ b/config.h.in @@ -160,6 +160,9 @@ /* Define if __stack_chk_guard canary should be randomized at program startup. */ #undef ENABLE_STACKGUARD_RANDOMIZE +/* Define if memory tagging support should be enabled. */ +#undef USE_MTAG + /* Package description. */ #undef PKGVERSION diff --git a/config.make.in b/config.make.in index 1ac9417245..7ae27564fd 100644 --- a/config.make.in +++ b/config.make.in @@ -84,6 +84,8 @@ mach-interface-list = @mach_interface_list@ experimental-malloc = @experimental_malloc@ +memory-tagging = @memory_tagging@ + nss-crypt = @libc_cv_nss_crypt@ static-nss-crypt = @libc_cv_static_nss_crypt@ diff --git a/configure b/configure index 4795e721e5..6a35553805 100755 --- a/configure +++ b/configure @@ -676,6 +676,7 @@ build_nscd libc_cv_static_nss_crypt libc_cv_nss_crypt build_crypt +memory_tagging experimental_malloc enable_werror all_warnings @@ -781,6 +782,7 @@ enable_all_warnings enable_werror enable_multi_arch enable_experimental_malloc +enable_memory_tagging enable_crypt enable_nss_crypt enable_systemtap @@ -1450,6 +1452,8 @@ Optional Features: architectures --disable-experimental-malloc disable experimental malloc features + --enable-memory-tagging enable memory tagging if supported by the + architecture [default=no] --disable-crypt do not build nor install the passphrase hashing library, libcrypt --enable-nss-crypt enable libcrypt to use nss @@ -3519,6 +3523,24 @@ fi +# Check whether --enable-memory-tagging was given. +if test "${enable_memory_tagging+set}" = set; then : + enableval=$enable_memory_tagging; memory_tagging=$enableval +else + memory_tagging=no +fi + +if test "$memory_tagging" = yes; then + # Only enable this on architectures that support it. + case $host_cpu in + aarch64) + $as_echo "#define USE_MTAG 1" >>confdefs.h + + ;; + esac +fi + + # Check whether --enable-crypt was given. if test "${enable_crypt+set}" = set; then : enableval=$enable_crypt; build_crypt=$enableval diff --git a/configure.ac b/configure.ac index 93e68fb696..43cfac9d48 100644 --- a/configure.ac +++ b/configure.ac @@ -311,6 +311,21 @@ AC_ARG_ENABLE([experimental-malloc], [experimental_malloc=yes]) AC_SUBST(experimental_malloc) +AC_ARG_ENABLE([memory-tagging], + AC_HELP_STRING([--enable-memory-tagging], + [enable memory tagging if supported by the architecture @<:@default=no@:>@]), + [memory_tagging=$enableval], + [memory_tagging=no]) +if test "$memory_tagging" = yes; then + # Only enable this on architectures that support it. + case $host_cpu in + aarch64) + AC_DEFINE(USE_MTAG) + ;; + esac +fi +AC_SUBST(memory_tagging) + AC_ARG_ENABLE([crypt], AC_HELP_STRING([--disable-crypt], [do not build nor install the passphrase hashing library, libcrypt]), 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. |