mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 13:10:29 +00:00
2abf9ff113
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.
37 lines
686 B
C
37 lines
686 B
C
/* Test program for making nonexecutable stacks executable
|
|
on DT_NEEDED load of a DSO that requires executable stacks. */
|
|
|
|
#include <dlfcn.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <error.h>
|
|
|
|
extern void tryme (void); /* from tst-execstack-mod.so */
|
|
|
|
static void deeper (void (*f) (void));
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
tryme ();
|
|
|
|
/* Test that growing the stack region gets new executable pages too. */
|
|
deeper (&tryme);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
deeper (void (*f) (void))
|
|
{
|
|
char stack[1100 * 1024];
|
|
memfrob (stack, sizeof stack);
|
|
(*f) ();
|
|
memfrob (stack, sizeof stack);
|
|
}
|
|
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|