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-rw-r--r--toolchain/uClibc/uClibc-0.9.31-workaround-GCC-PR32219.patch57
1 files changed, 57 insertions, 0 deletions
diff --git a/toolchain/uClibc/uClibc-0.9.31-workaround-GCC-PR32219.patch b/toolchain/uClibc/uClibc-0.9.31-workaround-GCC-PR32219.patch
new file mode 100644
index 000000000..242a5264b
--- /dev/null
+++ b/toolchain/uClibc/uClibc-0.9.31-workaround-GCC-PR32219.patch
@@ -0,0 +1,57 @@
+From 2e53dd645d5348f207cec7f8595969dc566c5a55 Mon Sep 17 00:00:00 2001
+From: Denys Vlasenko <vda.linux@googlemail.com>
+Date: Mon, 17 May 2010 15:56:19 +0200
+Subject: [PATCH] workaround GCC PR32219
+
+we ended up calling 0
+Fixes bug #1033
+
+Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
+Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
+---
+ libc/misc/internals/__uClibc_main.c | 15 +++++++++++++--
+ 1 files changed, 13 insertions(+), 2 deletions(-)
+
+diff --git a/libc/misc/internals/__uClibc_main.c b/libc/misc/internals/__uClibc_main.c
+index f9e1244..4ee4443 100644
+--- a/libc/misc/internals/__uClibc_main.c
++++ b/libc/misc/internals/__uClibc_main.c
+@@ -105,6 +105,17 @@ _pthread_cleanup_pop_restore(struct _pthread_cleanup_buffer *__buffer,
+
+ #endif /* !SHARED */
+
++/* Defeat compiler optimization which assumes function addresses are never NULL */
++static __always_inline int not_null_ptr(const void *p)
++{
++ const void *q;
++ __asm__ (""
++ : "=r" (q) /* output */
++ : "0" (p) /* input */
++ );
++ return q != 0;
++}
++
+ /*
+ * Prototypes.
+ */
+@@ -254,7 +265,7 @@ void __uClibc_init(void)
+
+ #ifdef __UCLIBC_HAS_LOCALE__
+ /* Initialize the global locale structure. */
+- if (likely(_locale_init!=NULL))
++ if (likely(not_null_ptr(_locale_init)))
+ _locale_init();
+ #endif
+
+@@ -264,7 +275,7 @@ void __uClibc_init(void)
+ * Thus we get a nice size savings because the stdio functions
+ * won't be pulled into the final static binary unless used.
+ */
+- if (likely(_stdio_init != NULL))
++ if (likely(not_null_ptr(_stdio_init)))
+ _stdio_init();
+
+ }
+--
+1.7.1
+