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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-22 00:37:49 +0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-11-29 08:43:39 +0400 |
| commit | 951b39619a76643972f6f23e007fd0f3fbbd71c2 (patch) | |
| tree | 731800f22816f82bcc006de111d92baeb2805c3b /arch/c6x/kernel | |
| parent | 24465a40ba452bd81fdc9eecb2d75bb903aafdf6 (diff) | |
| download | linux-951b39619a76643972f6f23e007fd0f3fbbd71c2.tar.xz | |
c6x: sanitize copy_thread(), get rid of clone(2) wrapper, switch to generic clone()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/c6x/kernel')
| -rw-r--r-- | arch/c6x/kernel/entry.S | 12 | ||||
| -rw-r--r-- | arch/c6x/kernel/process.c | 25 |
2 files changed, 5 insertions, 32 deletions
diff --git a/arch/c6x/kernel/entry.S b/arch/c6x/kernel/entry.S index 75f6f36472cf..1037b98953ca 100644 --- a/arch/c6x/kernel/entry.S +++ b/arch/c6x/kernel/entry.S @@ -613,18 +613,6 @@ ENDPROC(sys_sigaltstack) ;; Special system calls ;; return address is in B3 ;; -ENTRY(sys_clone) - ADD .D1X SP,8,A4 -#ifdef CONFIG_C6X_BIG_KERNEL - || MVKL .S1 sys_c6x_clone,A0 - MVKH .S1 sys_c6x_clone,A0 - BNOP .S2X A0,5 -#else - || B .S2 sys_c6x_clone - NOP 5 -#endif -ENDPROC(sys_clone) - ENTRY(sys_rt_sigreturn) ADD .D1X SP,8,A4 #ifdef CONFIG_C6X_BIG_KERNEL diff --git a/arch/c6x/kernel/process.c b/arch/c6x/kernel/process.c index 2770d9a9a84e..a3f91895e8b4 100644 --- a/arch/c6x/kernel/process.c +++ b/arch/c6x/kernel/process.c @@ -112,22 +112,6 @@ void exit_thread(void) { } -SYSCALL_DEFINE1(c6x_clone, struct pt_regs *, regs) -{ - unsigned long clone_flags; - unsigned long newsp; - - /* syscall puts clone_flags in A4 and usp in B4 */ - clone_flags = regs->orig_a4; - if (regs->b4) - newsp = regs->b4; - else - newsp = regs->sp; - - return do_fork(clone_flags, newsp, regs, 0, (int __user *)regs->a6, - (int __user *)regs->b6); -} - /* * Do necessary setup to start up a newly executed thread. */ @@ -155,13 +139,13 @@ void start_thread(struct pt_regs *regs, unsigned int pc, unsigned long usp) */ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long ustk_size, - struct task_struct *p, struct pt_regs *regs) + struct task_struct *p, struct pt_regs *unused) { struct pt_regs *childregs; childregs = task_pt_regs(p); - if (!regs) { + if (unlikely(p->flags & PF_KTHREAD)) { /* case of __kernel_thread: we return to supervisor space */ memset(childregs, 0, sizeof(struct pt_regs)); childregs->sp = (unsigned long)(childregs + 1); @@ -170,8 +154,9 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, childregs->a1 = ustk_size; /* argument */ } else { /* Otherwise use the given stack */ - *childregs = *regs; - childregs->sp = usp; + *childregs = *current_pt_regs(); + if (usp) + childregs->sp = usp; p->thread.pc = (unsigned long) ret_from_fork; } |