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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 | |
| parent | 9167304255940e29423517f63d11bdd968d7685e (diff) | |
| download | gdb-f68c9d09a395ad4bb48661401475ba7f8e8b8a2b.zip gdb-f68c9d09a395ad4bb48661401475ba7f8e8b8a2b.tar.gz 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')
| -rwxr-xr-x | ld/configure | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/ld/configure b/ld/configure index 07eb669..b7f29ca 100755 --- a/ld/configure +++ b/ld/configure @@ -852,6 +852,7 @@ enable_new_dtags enable_relro enable_textrel_check enable_separate_code +enable_mark_plt enable_warn_execstack enable_error_execstack enable_warn_rwx_segments @@ -1546,6 +1547,7 @@ Optional Features: --enable-textrel-check=[yes|no|warning|error] enable DT_TEXTREL check in ELF linker --enable-separate-code enable -z separate-code in ELF linker by default + --enable-mark-plt enable -z mark-plt in ELF x86-64 linker by default --enable-warn-execstack enable warnings when creating an executable stack --enable-error-execstack turn executable stack warnings into errors @@ -11681,7 +11683,7 @@ else lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 lt_status=$lt_dlunknown cat > conftest.$ac_ext <<_LT_EOF -#line 11684 "configure" +#line 11686 "configure" #include "confdefs.h" #if HAVE_DLFCN_H @@ -11787,7 +11789,7 @@ else lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 lt_status=$lt_dlunknown cat > conftest.$ac_ext <<_LT_EOF -#line 11790 "configure" +#line 11792 "configure" #include "confdefs.h" #if HAVE_DLFCN_H @@ -15682,6 +15684,17 @@ esac fi +# Decide if -z mark-plt should be enabled in ELF x86-64 linker by default. +ac_default_ld_z_mark_plt=unset +# Check whether --enable-mark-plt was given. +if test "${enable_mark_plt+set}" = set; then : + enableval=$enable_mark_plt; case "${enableval}" in + yes) ac_default_ld_z_mark_plt=1 ;; + no) ac_default_ld_z_mark_plt=0 ;; +esac +fi + + # By default warn when an executable stack is created due to object files # requesting such, not when the user specifies -z execstack. @@ -19365,6 +19378,15 @@ cat >>confdefs.h <<_ACEOF _ACEOF +if test "${ac_default_ld_z_mark_plt}" = unset; then + ac_default_ld_z_mark_plt=0 +fi + +cat >>confdefs.h <<_ACEOF +#define DEFAULT_LD_Z_MARK_PLT $ac_default_ld_z_mark_plt +_ACEOF + + cat >>confdefs.h <<_ACEOF |