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authorChristoph Hellwig <hch@lst.de>2005-11-07 00:59:47 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:42 -0800
commit481bed454247538e9f57d4ea37b153ccba24ba7b (patch)
treebb4198296962c08dbf52e8f377dc27206f621640 /arch/v850/kernel
parentdb73e9aa99bf093427b79877f9475392724fd5e5 (diff)
downloadlinux-2.6.34-ux500-481bed454247538e9f57d4ea37b153ccba24ba7b.tar.gz
[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 <hch@lst.de> Acked-by: Paul Mackerras <paulus@samba.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-By: David Howells <dhowells@redhat.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/v850/kernel')
-rw-r--r--arch/v850/kernel/ptrace.c43
1 files changed, 2 insertions, 41 deletions
diff --git a/arch/v850/kernel/ptrace.c b/arch/v850/kernel/ptrace.c
index d6077ff47d2..18492d02aaf 100644
--- a/arch/v850/kernel/ptrace.c
+++ b/arch/v850/kernel/ptrace.c
@@ -113,45 +113,10 @@ static int set_single_step (struct task_struct *t, int val)
return 1;
}
-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;
int rval;
- lock_kernel();
-
- if (request == PTRACE_TRACEME) {
- /* are we already being traced? */
- if (current->ptrace & PT_PTRACED) {
- rval = -EPERM;
- goto out;
- }
- /* set the ptrace bit in the process flags. */
- current->ptrace |= PT_PTRACED;
- rval = 0;
- goto out;
- }
- rval = -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;
-
- rval = -EPERM;
- if (pid == 1) /* you may not mess with init */
- goto out_tsk;
-
- if (request == PTRACE_ATTACH) {
- rval = ptrace_attach(child);
- goto out_tsk;
- }
- rval = ptrace_check_attach(child, request == PTRACE_KILL);
- if (rval < 0)
- goto out_tsk;
-
switch (request) {
unsigned long val, copied;
@@ -248,11 +213,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
rval = -EIO;
goto out;
}
-
-out_tsk:
- put_task_struct(child);
-out:
- unlock_kernel();
+ out:
return rval;
}