From 481bed454247538e9f57d4ea37b153ccba24ba7b Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 7 Nov 2005 00:59:47 -0800 Subject: [PATCH] consolidate sys_ptrace() The sys_ptrace boilerplate code (everything outside the big switch statement for the arch-specific requests) is shared by most architectures. This patch moves it to kernel/ptrace.c and leaves the arch-specific code as arch_ptrace. Some architectures have a too different ptrace so we have to exclude them. They continue to keep their implementations. For sh64 I had to add a sh64_ptrace wrapper because it does some initialization on the first call. For um I removed an ifdefed SUBARCH_PTRACE_SPECIAL block, but SUBARCH_PTRACE_SPECIAL isn't defined anywhere in the tree. Signed-off-by: Christoph Hellwig Acked-by: Paul Mackerras Acked-by: Ralf Baechle Acked-By: David Howells Acked-by: Russell King Acked-by: Paul Mundt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/frv/kernel/ptrace.c | 43 +------------------------------------------ 1 file changed, 1 insertion(+), 42 deletions(-) (limited to 'arch/frv/kernel') diff --git a/arch/frv/kernel/ptrace.c b/arch/frv/kernel/ptrace.c index cb335a14a31..f953484e7d5 100644 --- a/arch/frv/kernel/ptrace.c +++ b/arch/frv/kernel/ptrace.c @@ -106,48 +106,11 @@ void ptrace_enable(struct task_struct *child) child->thread.frame0->__status |= REG__STATUS_STEP; } -asmlinkage long sys_ptrace(long request, long pid, long addr, long data) +long arch_ptrace(struct task_struct *child, long request, long addr, long data) { - struct task_struct *child; unsigned long tmp; int ret; - lock_kernel(); - ret = -EPERM; - if (request == PTRACE_TRACEME) { - /* are we already being traced? */ - if (current->ptrace & PT_PTRACED) - goto out; - ret = security_ptrace(current->parent, current); - if (ret) - goto out; - /* set the ptrace bit in the process flags. */ - current->ptrace |= PT_PTRACED; - ret = 0; - goto out; - } - ret = -ESRCH; - read_lock(&tasklist_lock); - child = find_task_by_pid(pid); - if (child) - get_task_struct(child); - read_unlock(&tasklist_lock); - if (!child) - goto out; - - ret = -EPERM; - if (pid == 1) /* you may not mess with init */ - goto out_tsk; - - if (request == PTRACE_ATTACH) { - ret = ptrace_attach(child); - goto out_tsk; - } - - ret = ptrace_check_attach(child, request == PTRACE_KILL); - if (ret < 0) - goto out_tsk; - switch (request) { /* when I and D space are separate, these will need to be fixed. */ case PTRACE_PEEKTEXT: /* read word at location addr. */ @@ -351,10 +314,6 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data) ret = -EIO; break; } -out_tsk: - put_task_struct(child); -out: - unlock_kernel(); return ret; } -- cgit v1.2.3-18-g5258