Add Blackfin specific mmap implementation using sys_mmap2.

2 files changed, 25 insertions, 1 deletions

diff --git a/libc/sysdeps/linux/bfin/Makefile.arch b/libc/sysdeps/linux/bfin/Makefile.arch
index 7a428b380..fa62cc610 100644
--- a/libc/sysdeps/linux/bfin/Makefile.arch
+++ b/libc/sysdeps/linux/bfin/Makefile.arch
@@ -5,7 +5,7 @@
 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
 #
 
-CSRC := brk.c bsdsetjmp.c clone.c syscall.c
+CSRC := brk.c bsdsetjmp.c clone.c syscall.c mmap.c
 
 SSRC := __longjmp.S setjmp.S bsd-_setjmp.S vfork.S
 
diff --git a/libc/sysdeps/linux/bfin/mmap.c b/libc/sysdeps/linux/bfin/mmap.c
new file mode 100644
index 000000000..41140df0e
--- /dev/null
+++ b/libc/sysdeps/linux/bfin/mmap.c
@@ -0,0 +1,24 @@
+/* Use new style mmap for bfin */
+
+#include <unistd.h>
+#include <errno.h>
+#include <sys/mman.h>
+#include <sys/syscall.h>
+#include <asm/page.h>
+
+#define __NR___syscall_mmap2	    __NR_mmap2
+inline _syscall6(__ptr_t, __syscall_mmap2, __ptr_t, addr, 
+	size_t, len, int, prot, int, flags, int, fd, off_t, offset);
+
+libc_hidden_proto(mmap)
+
+__ptr_t mmap(__ptr_t addr, size_t len, int prot,
+		int flags, int fd, __off_t offset)
+{
+	if (offset & ~PAGE_MASK) {
+		return NULL;
+	}
+	return __syscall_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+}
+
+libc_hidden_def(mmap)