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| author | Nick Clifton <nickc@redhat.com> | 2022-05-03 11:42:24 +0100 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2022-05-03 11:42:24 +0100 |
| commit | ba951afb99912da01a6e8434126b8fac7aa75107 (patch) | |
| tree | e94ddfba29d29a82ab36d28592d6c8e7edd04350 /ld/configure.ac | |
| parent | 46465574a925062ba7dfa72f49ba5199d7a39fc3 (diff) | |
| download | gdb-ba951afb99912da01a6e8434126b8fac7aa75107.zip gdb-ba951afb99912da01a6e8434126b8fac7aa75107.tar.gz gdb-ba951afb99912da01a6e8434126b8fac7aa75107.tar.bz2 | |
Add a linker warning when creating potentially dangerous executable segments. Add tests, options to disabke and configure switches to choose defaults.
Diffstat (limited to 'ld/configure.ac')
| -rw-r--r-- | ld/configure.ac | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/ld/configure.ac b/ld/configure.ac index 7f4cff0..0b29e81 100644 --- a/ld/configure.ac +++ b/ld/configure.ac @@ -203,6 +203,35 @@ AC_ARG_ENABLE(separate-code, no) ac_default_ld_z_separate_code=0 ;; esac]) + +ac_default_ld_warn_execstack=unset +AC_ARG_ENABLE(warn-execstack, + AS_HELP_STRING([--enable-warn-execstack], + [enable warnings when creating an executable stack]), +[case "${enableval}" in + yes) ac_default_ld_warn_execstack=1 ;; + no) ac_default_ld_warn_execstack=-1 ;; +esac]) + +ac_default_ld_warn_rwx_segments=unset +AC_ARG_ENABLE(warn-rwx-segments, + AS_HELP_STRING([--enable-warn-rwx-segments], + [enable warnings when creating segements with RWX permissions]), +[case "${enableval}" in + yes) ac_default_ld_warn_rwx_segments=1 ;; + no) ac_default_ld_warn_rwx_segments=0 ;; +esac]) + +ac_default_ld_default_execstack=unset +AC_ARG_ENABLE(default-execstack, + AS_HELP_STRING([--enable-default-execstack], + [create an executable stack if an input file is missing a .note.GNU-stack section]), +[case "${enableval}" in + yes) ac_default_ld_default_execstack=1 ;; + no) ac_default_ld_default_execstack=0 ;; +esac]) + + # Decide if --error-handling-script should be supported. ac_support_error_handling_script=unset AC_ARG_ENABLE(error-handling-script, @@ -501,6 +530,29 @@ AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_SEPARATE_CODE, $ac_default_ld_z_separate_code, [Define to 1 if you want to enable -z separate-code in ELF linker by default.]) + +if test "${ac_default_ld_warn_execstack}" = unset; then + ac_default_ld_warn_execstack=0 +fi +AC_DEFINE_UNQUOTED(DEFAULT_LD_WARN_EXECSTACK, + $ac_default_ld_warn_execstack, + [Define to 1 if you want to enable --warn-execstack in ELF linker by default.]) + +if test "${ac_default_ld_warn_rwx_segments}" = unset; then + ac_default_ld_warn_rwx_segments=1 +fi +AC_DEFINE_UNQUOTED(DEFAULT_LD_WARN_RWX_SEGMENTS, + $ac_default_ld_warn_rwx_segments, + [Define to 0 if you want to disable --warn-rwx-segments in ELF linker by default.]) + +if test "${ac_default_ld_default_execstack}" = unset; then + ac_default_ld_default_execstack=1 +fi +AC_DEFINE_UNQUOTED(DEFAULT_LD_EXECSTACK, + $ac_default_ld_default_execstack, + [Define to 0 if you want to disable the generation of an executable stack when a .note-GNU-stack section is missing.]) + + if test "${ac_support_error_handling_script}" = unset; then ac_support_error_handling_script=1 fi |