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bfin: add support for new cacheflush syscall

Newer gcc's will generate a call to cacheflush when updating jump tables,
and that has to be done in kernel space (to avoid hardware anomalies).  So
make sure uClibc provides that symbol.

Signed-off-by: Steve Kilbane <steve@whitecrow.demon.co.uk>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Steve Kilbane 14 anos atrás
pai
commit
128e290b1e

+ 1 - 1
libc/sysdeps/linux/bfin/Makefile.arch

@@ -6,7 +6,7 @@
 #
 
 CSRC := bsdsetjmp.c clone.c \
-	sram-alloc.c sram-free.c dma-memcpy.c
+	sram-alloc.c sram-free.c dma-memcpy.c cacheflush.c
 
 SSRC := __longjmp.S setjmp.S bsd-_setjmp.S
 

+ 14 - 0
libc/sysdeps/linux/bfin/cacheflush.c

@@ -0,0 +1,14 @@
+/*
+ * cacheflush.c - Cache control functions for Blackfin.
+ *
+ * Copyright (C) 2010 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <unistd.h>
+#include <errno.h>
+#include <sys/syscall.h>
+#include <sys/cachectl.h>
+
+_syscall3 (int, cacheflush, void *, start, const int, nbytes, const int, flags)

+ 25 - 0
libc/sysdeps/linux/bfin/sys/cachectl.h

@@ -0,0 +1,25 @@
+/*
+ * cachectl.h - Functions for cache control on Blackfin.
+ *
+ * Copyright (C) 2010 Analog Devices, Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _SYS_CACHECTL_H
+#define _SYS_CACHECTL_H	1
+
+#include <features.h>
+
+/*
+ * Get the kernel definition for the flag bits
+ */
+#include <asm/cachectl.h>
+
+__BEGIN_DECLS
+
+extern int cacheflush (void *addr, __const int nbytes, __const int flags);
+
+__END_DECLS
+
+#endif	/* sys/cachectl.h */