diff options
| author | Steve Kilbane <steve@whitecrow.demon.co.uk> | 2011-02-21 19:44:42 -0500 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2011-02-21 19:51:02 -0500 |
| commit | 128e290b1e4204ac33b4cad7fc6189447f029311 (patch) | |
| tree | a537058a7df9c510d2c6f1945ed2e1d7fec89665 /libc/sysdeps/linux/bfin | |
| parent | f8355584a335a2a2dc03842f19ba9f1b587b2f5c (diff) | |
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>
Diffstat (limited to 'libc/sysdeps/linux/bfin')
| -rw-r--r-- | libc/sysdeps/linux/bfin/Makefile.arch | 2 | ||||
| -rw-r--r-- | libc/sysdeps/linux/bfin/cacheflush.c | 14 | ||||
| -rw-r--r-- | libc/sysdeps/linux/bfin/sys/cachectl.h | 25 |
3 files changed, 40 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/bfin/Makefile.arch b/libc/sysdeps/linux/bfin/Makefile.arch index 242703757..425a68898 100644 --- a/libc/sysdeps/linux/bfin/Makefile.arch +++ b/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 diff --git a/libc/sysdeps/linux/bfin/cacheflush.c b/libc/sysdeps/linux/bfin/cacheflush.c new file mode 100644 index 000000000..a8d81c419 --- /dev/null +++ b/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) diff --git a/libc/sysdeps/linux/bfin/sys/cachectl.h b/libc/sysdeps/linux/bfin/sys/cachectl.h new file mode 100644 index 000000000..ee4c03155 --- /dev/null +++ b/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 */ |