Add configuration options for enabling SSP

... in uClibc and glibc.

Fixes #681.

While here, relocate additional "sources" for uClibc/binutils into packages/
directory.

Signed-off-by: Alexey Neyman <stilor@att.net>

2 files changed, 56 insertions, 0 deletions

diff --git a/config/libc/glibc.in b/config/libc/glibc.in
index 5916a83..527063f 100644
--- a/config/libc/glibc.in
+++ b/config/libc/glibc.in
@@ -320,6 +320,45 @@ config GLIBC_MIN_KERNEL
     default LINUX_VERSION                 if GLIBC_KERNEL_VERSION_AS_HEADERS
     default GLIBC_MIN_KERNEL_VERSION      if GLIBC_KERNEL_VERSION_CHOSEN
 
+
+choice
+    bool "Stack-smashing protection (SSP) in glibc"
+    default GLIBC_SSP_DEFAULT
+
+config GLIBC_SSP_DEFAULT
+    bool "default"
+    help
+      Glibc's configure script determines the stack protection level.
+
+config GLIBC_SSP_NO
+    bool "no"
+    help
+      Glibc functions are not protected against stack-smashing.
+
+config GLIBC_SSP_YES
+    bool "yes"
+    help
+      Glibc is compiled with -fstack-protector option.
+
+config GLIBC_SSP_ALL
+    bool "all"
+    help
+      Glibc is compiled with -fstack-protector-all option.
+
+config GLIBC_SSP_STRONG
+    bool "strong"
+    help
+      Glibc is compiled with -fstack-protector-strong option.
+
+endchoice
+
+config GLIBC_SSP
+    string
+    default "no" if GLIBC_SSP_NO
+    default "yes" if GLIBC_SSP_YES
+    default "all" if GLIBC_SSP_ALL
+    default "strong" if GLIBC_SSP_STRONG
+
 # All supported versions of glibc build cleanly with GCC7 and earlier.
 # GCC8-related fixes were only available in glibc 2.27.
 config GLIBC_ENABLE_WERROR
diff --git a/config/libc/uClibc.in b/config/libc/uClibc.in
index 7bdd03f..2b11e0c 100644
--- a/config/libc/uClibc.in
+++ b/config/libc/uClibc.in
@@ -207,6 +207,23 @@ config LIBC_UCLIBC_RPC
     help
       Enable support for remote procedure calls (RPC) in uClibc.
 
+config LIBC_UCLIBC_HAS_SSP
+    bool
+    prompt "Support stack smashing protection (SSP)"
+    default y
+    help
+      Enable support for building programs with -fstack-protector family
+      of options. If this option is disabled, one can also use a standalone
+      libssp library from GCC.
+
+config LIBC_UCLIBC_BUILD_SSP
+    bool
+    prompt "Build uClibc with SSP"
+    depends on LIBC_UCLIBC_HAS_SSP
+    help
+      Build uClibc with -fstack-protector. This adds runtime overhead
+      to many function calls and is disabled by default.
+
 if ARCH_ARM
 config LIBC_UCLIBC_USE_GNU_SUFFIX
     bool