On x86, ifuncmain6pie failed with:
[hjl@gnu-cfl-2 build-i686-linux]$ ./elf/ifuncmain6pie --direct
./elf/ifuncmain6pie: IFUNC symbol 'foo' referenced in '/export/build/gnu/tools-build/glibc-32bit/build-i686-linux/elf/ifuncmod6.so' is defined in the executable and creates an unsatisfiable circular dependency.
[hjl@gnu-cfl-2 build-i686-linux]$ readelf -rW elf/ifuncmod6.so | grep foo
00003ff4 00000706 R_386_GLOB_DAT
0000400c foo_ptr
00003ff8 00000406 R_386_GLOB_DAT
00000000 foo
0000400c 00000401 R_386_32
00000000 foo
[hjl@gnu-cfl-2 build-i686-linux]$
Remove non-JUMP_SLOT relocations against foo in ifuncmod6.so, which
trigger the circular IFUNC dependency, and build ifuncmain6pie with
-Wl,-z,lazy.
CFLAGS-ifuncmain9pie.c += $(pie-ccflag)
CFLAGS-tst-ifunc-textrel.c += $(pic-ccflag)
+LDFLAGS-ifuncmain6pie = -Wl,-z,lazy
+
$(objpfx)ifuncmain1pie: $(objpfx)ifuncmod1.so
$(objpfx)ifuncmain1staticpie: $(objpfx)ifuncdep1pic.o
$(objpfx)ifuncmain1vispie: $(objpfx)ifuncmod1.so
#include "ifunc-sel.h"
typedef int (*foo_p) (void);
-extern foo_p foo_ptr;
static int
one (void)
}
extern int foo (void);
-extern foo_p get_foo (void);
+extern int call_foo (void);
extern foo_p get_foo_p (void);
-foo_p my_foo_ptr = foo;
+foo_p foo_ptr = foo;
int
main (void)
{
foo_p p;
- p = get_foo ();
- if (p != foo)
- abort ();
- if ((*p) () != -30)
+ if (call_foo () != -30)
abort ();
p = get_foo_p ();
if (foo_ptr != foo)
abort ();
- if (my_foo_ptr != foo)
- abort ();
if ((*foo_ptr) () != -30)
abort ();
- if ((*my_foo_ptr) () != -30)
- abort ();
if (foo () != -30)
abort ();
typedef int (*foo_p) (void);
-foo_p foo_ptr = foo;
+extern foo_p foo_ptr;
foo_p
get_foo_p (void)
return foo_ptr;
}
-foo_p
-get_foo (void)
+int
+call_foo (void)
{
- return foo;
+ return foo ();
}