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authorChris Zankel <czankel@tensilica.com>2006-12-10 02:18:52 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-10 09:55:39 -0800
commitfc4fb2adf944d45a7f3d4d38df991c79ffdb6a43 (patch)
treebee95910d719861e2a189f7464b6bd6de6f22d1c /arch/xtensa/kernel/process.c
parent173d6681380aa1d60dfc35ed7178bd7811ba2784 (diff)
[PATCH] xtensa: fix system call interface
This is a long outstanding patch to finally fix the syscall interface. The constants used for the system calls are those we have provided in our libc patches. This patch also fixes the shmbuf and stat structure, and fcntl definitions. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/xtensa/kernel/process.c')
-rw-r--r--arch/xtensa/kernel/process.c71
1 files changed, 41 insertions, 30 deletions
diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index 3785f3481d71..795bd5ac6f4c 100644
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -161,36 +161,6 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
/*
- * Create a kernel thread
- */
-
-int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- long retval;
- __asm__ __volatile__
- ("mov a5, %4\n\t" /* preserve fn in a5 */
- "mov a6, %3\n\t" /* preserve and setup arg in a6 */
- "movi a2, %1\n\t" /* load __NR_clone for syscall*/
- "mov a3, sp\n\t" /* sp check and sys_clone */
- "mov a4, %5\n\t" /* load flags for syscall */
- "syscall\n\t"
- "beq a3, sp, 1f\n\t" /* branch if parent */
- "callx4 a5\n\t" /* call fn */
- "movi a2, %2\n\t" /* load __NR_exit for syscall */
- "mov a3, a6\n\t" /* load fn return value */
- "syscall\n"
- "1:\n\t"
- "mov %0, a2\n\t" /* parent returns zero */
- :"=r" (retval)
- :"i" (__NR_clone), "i" (__NR_exit),
- "r" (arg), "r" (fn),
- "r" (flags | CLONE_VM)
- : "a2", "a3", "a4", "a5", "a6" );
- return retval;
-}
-
-
-/*
* These bracket the sleeping functions..
*/
@@ -452,3 +422,44 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r)
{
return dump_task_fpu(regs, current, r);
}
+
+asmlinkage
+long xtensa_clone(unsigned long clone_flags, unsigned long newsp,
+ void __user *parent_tid, void *child_tls,
+ void __user *child_tid, long a5,
+ struct pt_regs *regs)
+{
+ if (!newsp)
+ newsp = regs->areg[1];
+ return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
+}
+
+/*
+ * * xtensa_execve() executes a new program.
+ * */
+
+asmlinkage
+long xtensa_execve(char __user *name, char __user * __user *argv,
+ char __user * __user *envp,
+ long a3, long a4, long a5,
+ struct pt_regs *regs)
+{
+ long error;
+ char * filename;
+
+ filename = getname(name);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename))
+ goto out;
+ // FIXME: release coprocessor??
+ error = do_execve(filename, argv, envp, regs);
+ if (error == 0) {
+ task_lock(current);
+ current->ptrace &= ~PT_DTRACE;
+ task_unlock(current);
+ }
+ putname(filename);
+out:
+ return error;
+}
+