gcc/musl: rework SSP-support

[openwrt/staging/chunkeey.git] / toolchain / musl / patches / 200-add_libssp_nonshared.patch

diff --git a/toolchain/musl/patches/200-add_libssp_nonshared.patch b/toolchain/musl/patches/200-add_libssp_nonshared.patch
new file mode 100644 (file)
index 0000000..af05765
--- /dev/null
+++ b/toolchain/musl/patches/200-add_libssp_nonshared.patch
@@ -0,0 +1,58 @@
+From 7ec87fbbc3cac99b4173d082dd6195f47c9a32e7 Mon Sep 17 00:00:00 2001
+From: Steven Barth <steven@midlink.org>
+Date: Mon, 22 Jun 2015 11:01:56 +0200
+Subject: [PATCH] Add libssp_nonshared.a so GCC's is not needed
+
+Signed-off-by: Steven Barth <steven@midlink.org>
+---
+ Makefile                                  | 10 ++++++++--
+ libssp_nonshared/__stack_chk_fail_local.c |  2 ++
+ 2 files changed, 10 insertions(+), 2 deletions(-)
+ create mode 100644 libssp_nonshared/__stack_chk_fail_local.c
+
+diff --git a/Makefile b/Makefile
+index 2eb7b30..bfcabf7 100644
+--- a/Makefile
++++ b/Makefile
+@@ -48,7 +48,7 @@ CRT_LIBS = lib/crt1.o lib/Scrt1.o lib/rcrt1.o lib/crti.o lib/crtn.o
+ STATIC_LIBS = lib/libc.a
+ SHARED_LIBS = lib/libc.so
+ TOOL_LIBS = lib/musl-gcc.specs
+-ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS)
++ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS) lib/libssp_nonshared.a
+ ALL_TOOLS = tools/musl-gcc
+ 
+ LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH)$(SUBARCH).so.1
+@@ -103,7 +103,8 @@ NOSSP_SRCS = $(wildcard crt/*.c) \
+       src/env/__libc_start_main.c src/env/__init_tls.c \
+       src/thread/__set_thread_area.c src/env/__stack_chk_fail.c \
+       src/string/memset.c src/string/memcpy.c \
+-      src/ldso/dlstart.c src/ldso/dynlink.c
++      src/ldso/dlstart.c src/ldso/dynlink.c \
++      libssp_nonshared/__stack_chk_fail_local.c
+ $(NOSSP_SRCS:%.c=%.o) $(NOSSP_SRCS:%.c=%.lo): CFLAGS += $(CFLAGS_NOSSP)
+ 
+ $(CRT_LIBS:lib/%=crt/%): CFLAGS += -DCRT
+@@ -144,6 +145,11 @@ lib/libc.a: $(OBJS)
+       $(AR) rc $@ $(OBJS)
+       $(RANLIB) $@
+ 
++lib/libssp_nonshared.a: libssp_nonshared/__stack_chk_fail_local.o
++      rm -f $@
++      $(AR) rc $@ $<
++      $(RANLIB) $@
++
+ $(EMPTY_LIBS):
+       rm -f $@
+       $(AR) rc $@
+diff --git a/libssp_nonshared/__stack_chk_fail_local.c b/libssp_nonshared/__stack_chk_fail_local.c
+new file mode 100644
+index 0000000..2b403a6
+--- /dev/null
++++ b/libssp_nonshared/__stack_chk_fail_local.c
+@@ -0,0 +1,2 @@
++extern void __stack_chk_fail(void);
++void __attribute__((visibility ("hidden"))) __stack_chk_fail_local(void) { __stack_chk_fail(); }
+-- 
+2.1.4
+