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authorHaavard Skinnemoen <hskinnemoen@atmel.com>2007-11-27 13:02:40 +0100
committerHaavard Skinnemoen <hskinnemoen@atmel.com>2008-01-25 08:31:39 +0100
commit6ea6dd93c9454cc9521134f907bc970d09f460e4 (patch)
tree05f8d9f293d7127e19774d5fa10ebf685a6fa76d
parent[AVR32] Remove redundant try_to_freeze() call from do_signal() (diff)
downloadlinux-dev-6ea6dd93c9454cc9521134f907bc970d09f460e4.tar.xz
linux-dev-6ea6dd93c9454cc9521134f907bc970d09f460e4.zip
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 <hskinnemoen@atmel.com>
Diffstat (limited to '')
-rw-r--r--kernel/ptrace.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index c25db863081d..c719bb9d79ab 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)
lock_kernel();
if (request == PTRACE_TRACEME) {
ret = ptrace_traceme();
+ if (!ret)
+ arch_ptrace_attach(current);
goto out;
}