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| author | H.J. Lu <hjl.tools@gmail.com> | 2024-01-05 13:16:29 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2024-01-09 06:45:38 -0800 |
| commit | f68c9d09a395ad4bb48661401475ba7f8e8b8a2b (patch) | |
| tree | a929c5b1da632d0a87e59f28b2084f8b6fb94904 /ld/configure.ac | |
| parent | 9167304255940e29423517f63d11bdd968d7685e (diff) | |
| download | fsf-binutils-gdb-f68c9d09a395ad4bb48661401475ba7f8e8b8a2b.zip fsf-binutils-gdb-f68c9d09a395ad4bb48661401475ba7f8e8b8a2b.tar.gz fsf-binutils-gdb-f68c9d09a395ad4bb48661401475ba7f8e8b8a2b.tar.bz2 | |
ld: Add --enable-mark-plt configure option
Add --enable-mark-plt linker configure option to mark PLT entries with
DT_X86_64_PLT, DT_X86_64_PLTSZ and DT_X86_64_PLTENT dynamic tags by
default.
* NEWS: Mention -z mark-plt/-z nomark-plt and --enable-mark-plt.
* config.in: Regenerated.
* configure: Likewise.
* configure.ac: Add --enable-mark-plt.
(DEFAULT_LD_Z_MARK_PLT): New AC_DEFINE_UNQUOTED.
* emulparams/x86-64-plt.sh (PARSE_AND_LIST_OPTIONS_X86_64_PLT):
Support DEFAULT_LD_Z_MARK_PLT.
* emultempl/elf-x86.em (elf_x86_64_before_parse): New function.
(LDEMUL_BEFORE_PARSE): New. Set to elf_x86_64_before_parse for
x86-64 targets.
Diffstat (limited to 'ld/configure.ac')
| -rw-r--r-- | ld/configure.ac | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/ld/configure.ac b/ld/configure.ac index b46f415..4a11787 100644 --- a/ld/configure.ac +++ b/ld/configure.ac @@ -213,6 +213,16 @@ AC_ARG_ENABLE(separate-code, no) ac_default_ld_z_separate_code=0 ;; esac]) +# Decide if -z mark-plt should be enabled in ELF x86-64 linker by default. +ac_default_ld_z_mark_plt=unset +AC_ARG_ENABLE(mark-plt, + AS_HELP_STRING([--enable-mark-plt], + [enable -z mark-plt in ELF x86-64 linker by default]), +[case "${enableval}" in + yes) ac_default_ld_z_mark_plt=1 ;; + no) ac_default_ld_z_mark_plt=0 ;; +esac]) + # By default warn when an executable stack is created due to object files # requesting such, not when the user specifies -z execstack. @@ -562,6 +572,13 @@ 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_z_mark_plt}" = unset; then + ac_default_ld_z_mark_plt=0 +fi +AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_MARK_PLT, + $ac_default_ld_z_mark_plt, + [Define to 1 if you want to enable -z mark-plt in ELF x86-64 linker by default.]) + AC_DEFINE_UNQUOTED(DEFAULT_LD_WARN_EXECSTACK, $ac_default_ld_warn_execstack, |