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| author | H.J. Lu <hjl.tools@gmail.com> | 2020-04-27 15:44:07 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2020-05-18 08:38:53 -0700 |
| commit | 9e38f455a6c602be86b7b5a8d6523cbdcd7ec051 (patch) | |
| tree | 3fa62a570dd9ae651db62b21231a63358bd66edf /sysdeps/x86/configure | |
| parent | ce12fc711387375d0248ab3ff9084fb958c43bc6 (diff) | |
| download | glibc-9e38f455a6c602be86b7b5a8d6523cbdcd7ec051.tar.gz glibc-9e38f455a6c602be86b7b5a8d6523cbdcd7ec051.tar.xz glibc-9e38f455a6c602be86b7b5a8d6523cbdcd7ec051.zip | |
x86: Add --enable-cet=permissive
When CET is enabled, it is an error to dlopen a non CET enabled shared library in CET enabled application. It may be desirable to make CET permissive, that is disable CET when dlopening a non CET enabled shared library. With the new --enable-cet=permissive configure option, CET is disabled when dlopening a non CET enabled shared library. Add DEFAULT_DL_X86_CET_CONTROL to config.h.in: /* The default value of x86 CET control. */ #define DEFAULT_DL_X86_CET_CONTROL cet_elf_property which enables CET features based on ELF property note. --enable-cet=permissive it to /* The default value of x86 CET control. */ #define DEFAULT_DL_X86_CET_CONTROL cet_permissive which enables CET features permissively. Update tst-cet-legacy-5a, tst-cet-legacy-5b, tst-cet-legacy-6a and tst-cet-legacy-6b to check --enable-cet and --enable-cet=permissive.
Diffstat (limited to 'sysdeps/x86/configure')
| -rw-r--r-- | sysdeps/x86/configure | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/sysdeps/x86/configure b/sysdeps/x86/configure index b1ff281249..81cc4e80d6 100644 --- a/sysdeps/x86/configure +++ b/sysdeps/x86/configure @@ -1,7 +1,7 @@ # This file is generated from configure.ac by Autoconf. DO NOT EDIT! # Local configure fragment for sysdeps/x86. -if test x"$enable_cet" = xyes; then +if test $enable_cet != no; then # Check if CET can be enabled. { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether CET can be enabled" >&5 $as_echo_n "checking whether CET can be enabled... " >&6; } @@ -27,17 +27,11 @@ EOF fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_x86_cet_available" >&5 $as_echo "$libc_cv_x86_cet_available" >&6; } - if test $libc_cv_x86_cet_available = yes; then - enable_cet=yes - else - if test x"$enable_cet" = xdefault; then - enable_cet=no - else - as_fn_error $? "$CC doesn't support CET" "$LINENO" 5 - fi + if test $libc_cv_x86_cet_available != yes; then + as_fn_error $? "$CC doesn't support CET" "$LINENO" 5 fi fi -if test $enable_cet = yes; then +if test $enable_cet != no; then # Check if assembler supports CET. { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $AS supports CET" >&5 $as_echo_n "checking whether $AS supports CET... " >&6; } @@ -65,5 +59,12 @@ $as_echo "$libc_cv_x86_cet_as" >&6; } as_fn_error $? "$AS doesn't support CET" "$LINENO" 5 fi fi +if test $enable_cet = yes; then + $as_echo "#define DEFAULT_DL_X86_CET_CONTROL cet_elf_property" >>confdefs.h + +elif test $enable_cet = permissive; then + $as_echo "#define DEFAULT_DL_X86_CET_CONTROL cet_permissive" >>confdefs.h + +fi config_vars="$config_vars enable-cet = $enable_cet" |