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Add Blackfin specific mmap implementation using sys_mmap2.

Bernd Schmidt %!s(int64=17) %!d(string=hai) anos
pai
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c5b7f28ab5
Modificáronse 2 ficheiros con 25 adicións e 1 borrados
  1. 1 1
      libc/sysdeps/linux/bfin/Makefile.arch
  2. 24 0
      libc/sysdeps/linux/bfin/mmap.c

+ 1 - 1
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
 

+ 24 - 0
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)