[patch] This patch has the attachment 260620 in it.

glibc-2.12-hardened-pie.patch (text/plain), 2.70 KB, created by Magnus Granberg on 2011-01-31 21:44:20 UTC

2010-08-11	Magnus Granberg  <[e-mail]>

	#332331
	* Makeconfig (+link): Set to +link-pie.
	(+link-static): Change $(static-start-installed-name) to
	S$(static-start-installed-name).
	(+prector): Set to +prectorS.
	(+postctor): Set to +postctorS.

2011-01-21	Magnus Granberg  <[e-mail]>, squeezy <[e-mail]>

	#283470
	* sysdeps/unix/sysv/linux/x86_64/sigaction.c fix the __restore_rt symbol

--- libc/Makeconfig
+++ libc/Makeconfig
@@ -447,11 +447,12 @@
 	     $(common-objpfx)libc% $(+postinit),$^) \
 	     $(link-extra-libs) $(link-libc) $(+postctorS) $(+postinit)
 endif
++link = $(+link-pie)
 # Command for statically linking programs with the C library.
 ifndef +link-static
 +link-static = $(CC) -nostdlib -nostartfiles -static -o $@ \
 	      $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F))  \
-	      $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
+	      $(addprefix $(csu-objpfx),S$(static-start-installed-name)) \
 	      $(+preinit) $(+prector) \
 	      $(filter-out $(addprefix $(csu-objpfx),start.o \
 						     $(start-installed-name))\
@@ -549,11 +550,10 @@
 ifeq ($(elf),yes)
 +preinit = $(addprefix $(csu-objpfx),crti.o)
 +postinit = $(addprefix $(csu-objpfx),crtn.o)
-+prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
-+postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
-# Variants of the two previous definitions for linking PIE programs.
 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
++prector = $(+prectorS)
++postctor = $(+postctorS)
 +interp = $(addprefix $(elf-objpfx),interp.os)
 endif
 csu-objpfx = $(common-objpfx)csu/
--- sysdeps/unix/sysv/linux/x86_64/sigaction.c 2010-12-13 11:47:26.000000000 +0100
+++ sysdeps/unix/sysv/linux/x86_64/sigaction.c   2011-01-29 16:59:51.000000000 +0100
@@ -40,7 +40,7 @@

 /* Using the hidden attribute here does not change the code but it
    helps to avoid warnings.  */
-extern void restore_rt (void) asm ("__restore_rt") attribute_hidden;
+extern void restore_rt (void) asm ("__restore_rt") __attribute__((__visibility__("hidden")));


 /* If ACT is not NULL, change the action for SIG to *ACT.
@@ -126,6 +126,7 @@
    /* `nop' for debuggers assuming `call' should not disalign the code.  */ \
    "   nop\n"                                                          \
    ".align 16\n"                                                       \
+   ".globl __" #name "\n"                                              \
    ".LSTART_" #name ":\n"                                              \
    "   .type __" #name ",@function\n"                                  \
    "__" #name ":\n"                                                    \