Commit:     6ea6dd93c9454cc9521134f907bc970d09f460e4
Parent:     7f0f616bb093823b70855685cf085d39a8784818
Author:     Haavard Skinnemoen <[EMAIL PROTECTED]>
AuthorDate: Tue Nov 27 13:02:40 2007 +0100
Committer:  Haavard Skinnemoen <[EMAIL PROTECTED]>
CommitDate: Fri Jan 25 08:31:39 2008 +0100

    ptrace: Call arch_ptrace_attach() when request=PTRACE_TRACEME
    arch_ptrace_attach() is a hook that allows the architecture to do
    book-keeping after a ptrace attach. This patch adds a call to this
    hook when handling a PTRACE_TRACEME request as well.
    Currently only one architecture, m32r, implements this hook. When
    called, it initializes a number of debug trap slots in the ptraced
    task's thread struct, and it looks to me like this is the right thing
    to do after a PTRACE_TRACEME request as well, not only after
    PTRACE_ATTACH. Please correct me if I'm wrong.
    I want to use this hook on AVR32 to turn the debugging hardware on
    when a process is actually being debugged and keep it off otherwise.
    To be able to do this, I need to intercept PTRACE_TRACEME and
    PTRACE_ATTACH, as well as PTRACE_DETACH and thread exit. The latter
    two can be handled by existing hooks.
    Signed-off-by: Haavard Skinnemoen <[EMAIL PROTECTED]>
 kernel/ptrace.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index c25db86..c719bb9 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -470,6 +470,8 @@ asmlinkage long sys_ptrace(long request, long pid, long 
addr, long data)
        if (request == PTRACE_TRACEME) {
                ret = ptrace_traceme();
+               if (!ret)
+                       arch_ptrace_attach(current);
                goto out;
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