path: root/5.1.0/gentoo/09_all_default-ssp.patch

2014-04-27  Magnus Granberg  <zorry@gentoo.org>

	Patch orig: Debian/Ubuntu
	# 484714
	We Add -fstack-protector-strong as default and change
	ssp-buffer-size

--- a/configure.ac
+++ b/configure.ac
@@ -3238,6 +3238,9 @@ case $build in
     esac ;;
 esac
 
+# Needed when we build with -fstack-protector as default.
+stage1_cflags="$stage1_cflags -fno-stack-protector"
+
 AC_SUBST(stage1_cflags)
 
 # Enable --enable-checking in stage1 of the compiler.
--- a/configure
+++ b/configure
@@ -14453,7 +14453,8 @@ case $build in
     esac ;;
 esac
 
-
+# Needed when we build with -fstack-protector as default.
+stage1_cflags="$stage1_cflags -fno-stack-protector"
 
 # Enable --enable-checking in stage1 of the compiler.
 # Check whether --enable-stage1-checking was given.
--- a/Makefile.in
+++ b/Makefile.in
@@ -362,7 +362,7 @@ BUILD_PREFIX_1 = @BUILD_PREFIX_1@
 
 # Flags to pass to stage2 and later makes.  They are defined
 # here so that they can be overridden by Makefile fragments.
-BOOT_CFLAGS= -g -O2
+BOOT_CFLAGS= -g -O2 -fno-stack-protector
 BOOT_LDFLAGS=
 BOOT_ADAFLAGS= -gnatpg
 
@@ -408,9 +408,9 @@ GNATMAKE = @GNATMAKE@
 
 CFLAGS = @CFLAGS@
 LDFLAGS = @LDFLAGS@
-LIBCFLAGS = $(CFLAGS)
+LIBCFLAGS = $(CFLAGS) -fno-stack-protector
 CXXFLAGS = @CXXFLAGS@
-LIBCXXFLAGS = $(CXXFLAGS) -fno-implicit-templates
+LIBCXXFLAGS = $(CXXFLAGS) -fno-implicit-templates -fno-stack-protector
 GOCFLAGS = $(CFLAGS)
 
 TFLAGS =
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -9239,6 +9251,11 @@ Like @option{-fstack-protector} but incl
 be protected --- those that have local array definitions, or have
 references to local frame addresses.
 
+NOTE: In Gentoo GCC 4.9.0 and later versions this option is enabled by default
+for C, C++, ObjC, ObjC++, if neither @option{-fno-stack-protector}, 
+@option{-nostdlib}, @option{-ffreestanding}, @option{-fstack-protector}, 
+@option{-fstack-protector-strong}or @option{-fstack-protector-all}are found.
+
 @item -fsection-anchors
 @opindex fsection-anchors
 Try to reduce the number of symbolic address calculations by using
@@ -9461,6 +9465,9 @@
 The minimum size of buffers (i.e.@: arrays) that receive stack smashing
 protection when @option{-fstack-protection} is used.
 
+NOTE: In Gentoo this is change from "8" to "4", to increase
+the number of functions protected by the stack protector.
+
 @item max-jump-thread-duplication-stmts
 Maximum number of statements allowed in a block that needs to be
 duplicated when threading jumps.
--- a/gcc/cp/lang-specs.h
+++ b/gcc/cp/lang-specs.h
@@ -46,7 +46,7 @@ along with GCC; see the file COPYING3.  If not see
 		%(cpp_options) %2 -o %{save-temps*:%b.ii} %{!save-temps*:%g.ii} \n}\
       cc1plus %{save-temps*|no-integrated-cpp:-fpreprocessed %{save-temps*:%b.ii} %{!save-temps*:%g.ii}}\
 	      %{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}\
-	%(cc1_options) %2\
+	%(cc1_options) %(ssp_default) %2\
 	%{!fsyntax-only:%{!fdump-ada-spec*:-o %g.s %{!o*:--output-pch=%i.gch}\
         %W{o*:--output-pch=%*}}%V}}}}",
      CPLUSPLUS_CPP_SPEC, 0, 0},
@@ -57,11 +57,11 @@ along with GCC; see the file COPYING3.  If not see
 		%(cpp_options) %2 -o %{save-temps*:%b.ii} %{!save-temps*:%g.ii} \n}\
       cc1plus %{save-temps*|no-integrated-cpp:-fpreprocessed %{save-temps*:%b.ii} %{!save-temps*:%g.ii}}\
 	      %{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}\
-	%(cc1_options) %2\
+	%(cc1_options) %(ssp_default) %2\
        %{!fsyntax-only:%(invoke_as)}}}}",
      CPLUSPLUS_CPP_SPEC, 0, 0},
   {".ii", "@c++-cpp-output", 0, 0, 0},
   {"@c++-cpp-output",
    "%{!M:%{!MM:%{!E:\
-    cc1plus -fpreprocessed %i %(cc1_options) %2\
+    cc1plus -fpreprocessed %i %(cc1_options) %(ssp_default) %2\
     %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -651,6 +651,19 @@ proper position among the other output files.  */
 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L %G"
 #endif
 
+#ifndef SSP_DEFAULT_SPEC
+#if defined ( TARGET_LIBC_PROVIDES_SSP ) && defined ( EFAULT_SSP )
+#define SSP_DEFAULT_SPEC "%{fno-stack-protector|fstack-protector| \
+  fstack-protector-strong|fstack-protector-all| \
+  ffreestanding|nostdlib:;:-fstack-protector-strong}"
+/* Add -fno-stack-protector for the use of gcc-specs-ssp.  */
+#define CC1_SSP_DEFAULT_SPEC "%{!fno-stack-protector:}"
+#else
+#define SSP_DEFAULT_SPEC ""
+#define CC1_SSP_DEFAULT_SPEC ""
+#endif
+#endif
+
 #ifndef LINK_SSP_SPEC
 #ifdef TARGET_LIBC_PROVIDES_SSP
 #define LINK_SSP_SPEC "%{fstack-protector:}"
@@ -771,7 +781,7 @@ proper position among the other output f
 
 static const char *asm_debug = ASM_DEBUG_SPEC;
 static const char *cpp_spec = CPP_SPEC;
-static const char *cc1_spec = CC1_SPEC;
+static const char *cc1_spec = CC1_SPEC CC1_SSP_DEFAULT_SPEC;
 static const char *cc1plus_spec = CC1PLUS_SPEC;
 static const char *link_gcc_c_sequence_spec = LINK_GCC_C_SEQUENCE_SPEC;
 static const char *link_ssp_spec = LINK_SSP_SPEC;
@@ -777,6 +785,8 @@ static const char *cc1_spec = CC1_SPEC;
 static const char *cc1plus_spec = CC1PLUS_SPEC;
 static const char *link_gcc_c_sequence_spec = LINK_GCC_C_SEQUENCE_SPEC;
 static const char *link_ssp_spec = LINK_SSP_SPEC;
+static const char *ssp_default_spec = SSP_DEFAULT_SPEC;
+static const char *cc1_ssp_default_spec = CC1_SSP_DEFAULT_SPEC;
 static const char *asm_spec = ASM_SPEC;
 static const char *asm_final_spec = ASM_FINAL_SPEC;
 static const char *link_spec = LINK_SPEC;
@@ -835,7 +844,7 @@ static const char *cpp_unique_options =
 static const char *cpp_options =
 "%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}\
  %{f*} %{g*:%{!g0:%{g*} %{!fno-working-directory:-fworking-directory}}} %{O*}\
- %{undef} %{save-temps*:-fpch-preprocess}";
+ %{undef} %{save-temps*:-fpch-preprocess} %(ssp_default)";
 
 /* This contains cpp options which are not passed when the preprocessor
    output will be used by another program.  */
@@ -1015,9 +1024,9 @@ static const struct compiler default_compilers[] =
       %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \
 	  %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\
 	    cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \
-	  %(cc1_options)}\
+	  %(cc1_options) %(ssp_default)}\
       %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\
-	  cc1 %(cpp_unique_options) %(cc1_options)}}}\
+	  cc1 %(cpp_unique_options) %(cc1_options) %(ssp_default)}}}\
       %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 1},
   {"-",
    "%{!E:%e-E or -x required when input is from standard input}\
@@ -1040,7 +1049,7 @@ static const struct compiler default_compilers[] =
                     %W{o*:--output-pch=%*}}%V}}}}}}", 0, 0, 0},
   {".i", "@cpp-output", 0, 0, 0},
   {"@cpp-output",
-   "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
+   "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %(ssp_default) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
   {".s", "@assembler", 0, 0, 0},
   {"@assembler",
    "%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 0, 0},
@@ -1267,6 +1276,8 @@ static struct spec_list static_specs[] =
   INIT_STATIC_SPEC ("cc1plus",			&cc1plus_spec),
   INIT_STATIC_SPEC ("link_gcc_c_sequence",	&link_gcc_c_sequence_spec),
   INIT_STATIC_SPEC ("link_ssp",			&link_ssp_spec),
+  INIT_STATIC_SPEC ("ssp_default",		&ssp_default_spec),
+  INIT_STATIC_SPEC ("cc1_ssp_default",	&cc1_ssp_default_spec),
   INIT_STATIC_SPEC ("endfile",			&endfile_spec),
   INIT_STATIC_SPEC ("link",			&link_spec),
   INIT_STATIC_SPEC ("lib",			&lib_spec),
--- a/gcc/objc/lang-specs.h
+++ b/gcc/objc/lang-specs.h
@@ -29,9 +29,9 @@ along with GCC; see the file COPYING3.  If not see
 	%{traditional|traditional-cpp:\
 %eGNU Objective C no longer supports traditional compilation}\
 	%{save-temps*|no-integrated-cpp:cc1obj -E %(cpp_options) -o %{save-temps*:%b.mi} %{!save-temps*:%g.mi} \n\
-	    cc1obj -fpreprocessed %{save-temps*:%b.mi} %{!save-temps*:%g.mi} %(cc1_options) %{print-objc-runtime-info} %{gen-decls}}\
+	    cc1obj -fpreprocessed %{save-temps*:%b.mi} %{!save-temps*:%g.mi} %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}}\
 	%{!save-temps*:%{!no-integrated-cpp:\
-	    cc1obj %(cpp_unique_options) %(cc1_options) %{print-objc-runtime-info} %{gen-decls}}}\
+	    cc1obj %(cpp_unique_options) %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}}}\
         %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
   {"@objective-c-header",
      "%{E|M|MM:cc1obj -E %{traditional|traditional-cpp:-traditional-cpp}\
@@ -40,18 +40,18 @@ along with GCC; see the file COPYING3.  If not see
 	%{traditional|traditional-cpp:\
 %eGNU Objective C no longer supports traditional compilation}\
 	%{save-temps*|no-integrated-cpp:cc1obj -E %(cpp_options) -o %{save-temps*:%b.mi} %{!save-temps*:%g.mi} \n\
-	    cc1obj -fpreprocessed %b.mi %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\
+	    cc1obj -fpreprocessed %b.mi %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}\
                         -o %g.s %{!o*:--output-pch=%i.gch}\
                         %W{o*:--output-pch=%*}%V}\
 	%{!save-temps*:%{!no-integrated-cpp:\
-	    cc1obj %(cpp_unique_options) %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\
+	    cc1obj %(cpp_unique_options) %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}\
                         -o %g.s %{!o*:--output-pch=%i.gch}\
                         %W{o*:--output-pch=%*}%V}}}}}", 0, 0, 0},
   {".mi", "@objective-c-cpp-output", 0, 0, 0},
   {"@objective-c-cpp-output",
-     "%{!M:%{!MM:%{!E:cc1obj -fpreprocessed %i %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\
+     "%{!M:%{!MM:%{!E:cc1obj -fpreprocessed %i %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}\
 			     %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
   {"@objc-cpp-output",
       "%nobjc-cpp-output is deprecated; please use objective-c-cpp-output instead\n\
-       %{!M:%{!MM:%{!E:cc1obj -fpreprocessed %i %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\
+       %{!M:%{!MM:%{!E:cc1obj -fpreprocessed %i %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}\
 			     %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
--- a/gcc/objcp/lang-specs.h
+++ b/gcc/objcp/lang-specs.h
@@ -36,7 +36,7 @@ along with GCC; see the file COPYING3.  If not see
 		%(cpp_options) %2 -o %{save-temps*:%b.mii} %{!save-temps*:%g.mii} \n}\
       cc1objplus %{save-temps*|no-integrated-cpp:-fpreprocessed %{save-temps*:%b.mii} %{!save-temps*:%g.mii}}\
 	      %{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}\
-	%(cc1_options) %2\
+	%(cc1_options) %(ssp_default) %2\
         -o %g.s %{!o*:--output-pch=%i.gch} %W{o*:--output-pch=%*}%V}}}",
      CPLUSPLUS_CPP_SPEC, 0, 0},
   {"@objective-c++",
@@ -46,16 +46,16 @@ along with GCC; see the file COPYING3.  If not see
 		%(cpp_options) %2 -o %{save-temps*:%b.mii} %{!save-temps*:%g.mii} \n}\
       cc1objplus %{save-temps*|no-integrated-cpp:-fpreprocessed %{save-temps*:%b.mii} %{!save-temps*:%g.mii}}\
 	      %{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}\
-	%(cc1_options) %2\
+	%(cc1_options) %(ssp_default) %2\
        %{!fsyntax-only:%(invoke_as)}}}}",
      CPLUSPLUS_CPP_SPEC, 0, 0},
   {".mii", "@objective-c++-cpp-output", 0, 0, 0},
   {"@objective-c++-cpp-output",
    "%{!M:%{!MM:%{!E:\
-    cc1objplus -fpreprocessed %i %(cc1_options) %2\
+    cc1objplus -fpreprocessed %i %(cc1_options) %(ssp_default) %2\
     %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
   {"@objc++-cpp-output",
    "%nobjc++-cpp-output is deprecated; please use objective-c++-cpp-output instead\n\
     %{!M:%{!MM:%{!E:\
-    cc1objplus -fpreprocessed %i %(cc1_options) %2\
+    cc1objplus -fpreprocessed %i %(cc1_options) %(ssp_default) %2\
     %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
--- a/gcc/params.def
+++ b/gcc/params.def
@@ -662,7 +662,7 @@ DEFPARAM (PARAM_INTEGER_SHARE_LIMIT,
 DEFPARAM (PARAM_SSP_BUFFER_SIZE,
 	  "ssp-buffer-size",
 	  "The lower bound for a buffer to be considered for stack smashing protection",
-	  8, 1, 0)
+	  4, 1, 0)
 
 /* When we thread through a block we have to make copies of the
    statements within the block.  Clearly for large blocks the code