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