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| author | Roland McGrath <roland@gnu.org> | 2003-09-23 12:07:26 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 2003-09-23 12:07:26 +0000 |
| commit | 2abf9ff11384a47dc456c138a8faf6b1469aac2b (patch) | |
| tree | d0ccba6b9bf3096c8d1d2d209984bf4d28597408 /configure.in | |
| parent | ecdeaac05f73c29eca92eecd55ad4fb8513c7771 (diff) | |
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* sysdeps/i386/dl-machine.h (RTLD_START): Set __libc_stack_end before
calling _dl_start, using GOTOFF access.
* configure.in (libc_cv_z_execstack): New check.
* configure: Regenerated.
* config.make.in (have-z-execstack): New variable set by it.
* elf/tst-execstack.c: New file.
* elf/tst-execstack-mod.c: New file.
* elf/tst-execstack-needed.c: New file.
* elf/Makefile (tests-execstack-yes, modules-execstack-yes): New
variables.
(tests, modules-names): Conditionally include them.
(distribute): Add tst-execstack-mod.c here.
($(objpfx)tst-execstack, $(objpfx)tst-execstack.out): New targets.
(LDFLAGS-tst-execstack, LDFLAGS-tst-execstack-mod): New variables.
($(objpfx)tst-execstack-needed): New target.
(LDFLAGS-tst-execstack-needed): New variable.
* sysdeps/generic/ldsodefs.h (struct rtld_global): Add _dl_stack_flags
and _dl_make_stack_executable_hook. Declare _dl_make_stack_executable.
* elf/rtld.c (_rtld_global): Add initializer for _dl_stack_flags.
(dl_main): Reset _dl_stack_flags according to PT_GNU_STACK phdr.
Initialize _dl_make_stack_executable_hook.
* elf/dl-support.c: Define those new variables.
(_dl_non_dynamic_init): Scan phdrs for PT_GNU_STACK.
(_dl_phdr): Fix type.
* elf/dl-load.c (_dl_map_object_from_fd): Grok PT_GNU_STACK phdr and
enable execute permission for the stack if necessary.
* sysdeps/generic/dl-execstack.c: New file.
* elf/Makefile (dl-routines): Add it.
* elf/Versions (ld: GLIBC_PRIVATE): Add _dl_make_stack_executable.
* sysdeps/unix/sysv/linux/dl-execstack.c: New file.
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/configure.in b/configure.in index 91d903f591..c3f4adb89d 100644 --- a/configure.in +++ b/configure.in @@ -1334,6 +1334,7 @@ EOF ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack" fi AC_SUBST(ASFLAGS_config) + AC_CACHE_CHECK(for -z combreloc, libc_cv_z_combreloc, [dnl cat > conftest.c <<EOF @@ -1363,8 +1364,25 @@ dnl look for a section named .rel.dyn. if test "$libc_cv_z_combreloc" = yes; then AC_DEFINE(HAVE_Z_COMBRELOC) fi + AC_SUBST(libc_cv_z_combreloc) + + AC_CACHE_CHECK(for -z execstack, + libc_cv_z_execstack, [dnl + cat > conftest.c <<EOF +int _start (void) { return 42; } +EOF + if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS + -shared -o conftest.so conftest.c + -Wl,-z,execstack -nostdlib + 1>&AS_MESSAGE_LOG_FD]) + then + libc_cv_z_execstack=yes + else + libc_cv_z_execstack=no + fi + rm -f conftest*]) + AC_SUBST(libc_cv_z_execstack) fi -AC_SUBST(libc_cv_z_combreloc) if test $elf != yes; then AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini, |