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Diffstat (limited to 'arch/frv/kernel/process.c')
-rw-r--r--arch/frv/kernel/process.c66
1 files changed, 23 insertions, 43 deletions
diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c
index 2eb7fa5bf9d8..655d90d20bb0 100644
--- a/arch/frv/kernel/process.c
+++ b/arch/frv/kernel/process.c
@@ -38,6 +38,7 @@
#include "local.h"
asmlinkage void ret_from_fork(void);
+asmlinkage void ret_from_kernel_thread(void);
#include <asm/pgalloc.h>
@@ -172,32 +173,13 @@ asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
* set up the kernel stack and exception frames for a new process
*/
int copy_thread(unsigned long clone_flags,
- unsigned long usp, unsigned long topstk,
+ unsigned long usp, unsigned long arg,
struct task_struct *p, struct pt_regs *regs)
{
- struct pt_regs *childregs0, *childregs, *regs0;
+ struct pt_regs *childregs;
- regs0 = __kernel_frame0_ptr;
- childregs0 = (struct pt_regs *)
+ childregs = (struct pt_regs *)
(task_stack_page(p) + THREAD_SIZE - FRV_FRAME0_SIZE);
- childregs = childregs0;
-
- /* set up the userspace frame (the only place that the USP is stored) */
- *childregs0 = *regs0;
-
- childregs0->gr8 = 0;
- childregs0->sp = usp;
- childregs0->next_frame = NULL;
-
- /* set up the return kernel frame if called from kernel_thread() */
- if (regs != regs0) {
- childregs--;
- *childregs = *regs;
- childregs->sp = (unsigned long) childregs0;
- childregs->next_frame = childregs0;
- childregs->gr15 = (unsigned long) task_thread_info(p);
- childregs->gr29 = (unsigned long) p;
- }
p->set_child_tid = p->clear_child_tid = NULL;
@@ -206,8 +188,25 @@ int copy_thread(unsigned long clone_flags,
p->thread.sp = (unsigned long) childregs;
p->thread.fp = 0;
p->thread.lr = 0;
- p->thread.pc = (unsigned long) ret_from_fork;
- p->thread.frame0 = childregs0;
+ p->thread.frame0 = childregs;
+
+ if (unlikely(!regs)) {
+ memset(childregs, 0, sizeof(struct pt_regs));
+ childregs->gr9 = usp; /* function */
+ childregs->gr8 = arg;
+ chilregs->psr = PSR_S;
+ p->thread.pc = (unsigned long) ret_from_kernel_thread;
+ save_user_regs(p->thread.user);
+ return 0;
+ }
+
+ /* set up the userspace frame (the only place that the USP is stored) */
+ *childregs = *regs;
+
+ childregs->sp = usp;
+ childregs->next_frame = NULL;
+
+ p->thread.pc = (unsigned long) ret_from_fork;
/* the new TLS pointer is passed in as arg #5 to sys_clone() */
if (clone_flags & CLONE_SETTLS)
@@ -218,25 +217,6 @@ int copy_thread(unsigned long clone_flags,
return 0;
} /* end copy_thread() */
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(const char __user *name,
- const char __user *const __user *argv,
- const char __user *const __user *envp)
-{
- int error;
- char * filename;
-
- filename = getname(name);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- return error;
- error = do_execve(filename, argv, envp, __frame);
- putname(filename);
- return error;
-}
-
unsigned long get_wchan(struct task_struct *p)
{
struct pt_regs *regs0;