[PATCH] AVR32: Implement kernel_execve

Move execve() into arch/avr32/kernel/sys_avr32.c, rename it to
kernel_execve() and return the syscall return value directly without
setting errno.

This also gets rid of the __KERNEL_SYSCALLS__ stuff from unistd.h and
expands #ifdef __KERNEL__ to cover everything in unistd.h except the
__NR_foo definitions.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/arch/avr32/kernel/sys_avr32.c b/arch/avr32/kernel/sys_avr32.c
index 6ec5693da448..8deb6003ee62 100644
--- a/arch/avr32/kernel/sys_avr32.c
+++ b/arch/avr32/kernel/sys_avr32.c
@@ -49,3 +49,17 @@ asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
                 fput(file);
         return error;
 }
+
+int kernel_execve(const char *file, char **argv, char **envp)
+{
+        register long scno asm("r8") = __NR_execve;
+        register long sc1 asm("r12") = (long)file;
+        register long sc2 asm("r11") = (long)argv;
+        register long sc3 asm("r10") = (long)envp;
+
+        asm volatile("scall"
+                     : "=r"(sc1)
+                     : "r"(scno), "0"(sc1), "r"(sc2), "r"(sc3)
+                     : "cc", "memory");
+        return sc1;
+}