From fb84603f8c45fdafdaa750490785fc1b15541386 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Fri, 2 Jan 2004 23:34:13 +0000 Subject: Peter S. Mazinger writes: Hello Erik! I have made some cosmetical changes to the files, removed the added SCRT=-fPIC option from building the crt0.S file (but it is a requirement to build them with -fPIC), and changed some comments. I have left the ldso.c patch with PIE_SUPPORT ifdefs, but consider applying it w/o them (see some earlier comment from PaX Team on this issue, as it is considered a bug). To have it work correctly, you'll also need removing COMPLETELY_PIC. One thing is missing: PIE_SUPPORT should be usable only for i386 (for now). Also added the support for propolice protection (that works for me and catches memcpy/strcpy attacks (but needs a special gcc version). Thanks, Peter --- libc/sysdeps/linux/i386/Makefile | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'libc/sysdeps/linux/i386/Makefile') diff --git a/libc/sysdeps/linux/i386/Makefile b/libc/sysdeps/linux/i386/Makefile index 9ba60f59e..c7f88b681 100644 --- a/libc/sysdeps/linux/i386/Makefile +++ b/libc/sysdeps/linux/i386/Makefile @@ -22,6 +22,9 @@ ASFLAGS=$(CFLAGS) CRT0_SRC = crt0.S CRT0_OBJ = crt0.o crt1.o gcrt1.o +ifeq ($(strip $(UCLIBC_PIE_SUPPORT)),y) +CRT0_OBJ += Scrt0.o Scrt1.o +endif CRT0_DEPS=gmon-start.S CTOR_TARGETS=$(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o @@ -44,6 +47,13 @@ $(LIBC): ar-target ar-target: $(OBJS) $(CRT0_OBJ) $(CTOR_TARGETS) $(AR) $(ARFLAGS) $(LIBC) $(OBJS) cp $(CRT0_OBJ) $(TOPDIR)lib/ +ifeq ($(strip $(UCLIBC_PIE_SUPPORT)),y) +ifeq ($(strip $(UCLIBC_CTOR_DTOR)),y) + $(RM) $(TOPDIR)lib/Scrt0.o +else + mv $(TOPDIR)lib/Scrt0.o $(TOPDIR)lib/Scrt1.o +endif +endif $(CRT0_OBJ): $(CRT0_SRC) $(CC) $(CFLAGS) -DL_$* $< -c -o $*.o -- cgit v1.2.3