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authorFelix Fietkau <nbd@openwrt.org>2012-02-17 16:55:08 +0000
committerFelix Fietkau <nbd@openwrt.org>2012-02-17 16:55:08 +0000
commita86e168c5445beddf351aadccb2f1c8ac1ea24ce (patch)
treea619789b7204a74b06e8fa29a1b8dce1b93a5bb1 /toolchain
parent42ed1bd9e6babd091b55fdcf9cb361d7a863c423 (diff)
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gcc: use .eh_frame sections for exception handling stack unwind - saves about 400 bytes on every executable or shared library
SVN-Revision: 30614
Diffstat (limited to 'toolchain')
-rw-r--r--toolchain/gcc/patches/4.6-linaro/860-uclibc_use_eh_frame.patch29
1 files changed, 29 insertions, 0 deletions
diff --git a/toolchain/gcc/patches/4.6-linaro/860-uclibc_use_eh_frame.patch b/toolchain/gcc/patches/4.6-linaro/860-uclibc_use_eh_frame.patch
new file mode 100644
index 0000000..6b85d49
--- /dev/null
+++ b/toolchain/gcc/patches/4.6-linaro/860-uclibc_use_eh_frame.patch
@@ -0,0 +1,29 @@
+--- a/gcc/crtstuff.c
++++ b/gcc/crtstuff.c
+@@ -100,15 +100,20 @@
+ #if defined(OBJECT_FORMAT_ELF) \
+ && !defined(OBJECT_FORMAT_FLAT) \
+ && defined(HAVE_LD_EH_FRAME_HDR) \
+- && !defined(inhibit_libc) && !defined(CRTSTUFFT_O) \
+- && defined(__GLIBC__) && __GLIBC__ >= 2
++ && !defined(inhibit_libc) && !defined(CRTSTUFFT_O)
+ #include <link.h>
+ /* uClibc pretends to be glibc 2.2 and DT_CONFIG is defined in its link.h.
+ But it doesn't use PT_GNU_EH_FRAME ELF segment currently. */
+-# if !defined(__UCLIBC__) \
+- && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
+- || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
+-# define USE_PT_GNU_EH_FRAME
++# if defined(__UCLIBC__)
++# if (__UCLIBC_MAJOR__ > 0 || __UCLIBC_MINOR__ > 9 || \
++ (__UCLIBC_MINOR__ == 9 && __UCLIBC_SUBLEVEL__ >= 33))
++# define USE_PT_GNU_EH_FRAME
++# endif
++# elif defined(__GLIBC__)
++# if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
++ || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
++# define USE_PT_GNU_EH_FRAME
++# endif
+ # endif
+ #endif
+ #if defined(EH_FRAME_SECTION_NAME) && !defined(USE_PT_GNU_EH_FRAME)