From: Alexey Dobriyan <adobriyan@gmail.com>
To: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org,
containers@lists.linux-foundation.org,
torvalds@linux-foundation.org, xemul@parallels.com,
orenl@cs.columbia.edu, serue@us.ibm.com, dave@linux.vnet.ibm.com,
mingo@elte.hu, Alexey Dobriyan <adobriyan@gmail.com>
Subject: [PATCH 24/38] C/R: x86_64 debug registers
Date: Fri, 22 May 2009 08:55:18 +0400 [thread overview]
Message-ID: <1242968132-1044-24-git-send-email-adobriyan@gmail.com> (raw)
In-Reply-To: <1242968132-1044-1-git-send-email-adobriyan@gmail.com>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---
include/linux/kstate-image.h | 7 +++++++
kernel/kstate/kstate-x86_64.c | 26 ++++++++++++++++++++++----
2 files changed, 29 insertions(+), 4 deletions(-)
diff --git a/include/linux/kstate-image.h b/include/linux/kstate-image.h
index d697d97..7c54711 100644
--- a/include/linux/kstate-image.h
+++ b/include/linux/kstate-image.h
@@ -143,6 +143,13 @@ struct kstate_image_task_struct_x86_64 {
__u16 gsindex;
__u16 ss;
+ __u64 dr0;
+ __u64 dr1;
+ __u64 dr2;
+ __u64 dr3;
+ __u64 dr6;
+ __u64 dr7;
+
__u64 tls_array[3];
} __packed;
diff --git a/kernel/kstate/kstate-x86_64.c b/kernel/kstate/kstate-x86_64.c
index 0d85704..83ed1b5 100644
--- a/kernel/kstate/kstate-x86_64.c
+++ b/kernel/kstate/kstate-x86_64.c
@@ -109,6 +109,10 @@ static int check_image_task_struct_x86_64(struct kstate_image_task_struct *tsk_i
if (rv < 0)
return rv;
+ rv = ptrace_check_debugreg(0, i->dr0, i->dr1, i->dr2, i->dr3, i->dr6, i->dr7);
+ if (rv < 0)
+ return rv;
+
if (i->tls_array[0]) {
rv = check_tls((struct desc_struct *)&i->tls_array[0]);
if (rv < 0)
@@ -150,10 +154,6 @@ int kstate_arch_check_task_struct(struct task_struct *tsk)
return -EINVAL;
}
#endif
- if (test_tsk_thread_flag(tsk, TIF_DEBUG)) {
- WARN_ON(1);
- return -EINVAL;
- }
if (tsk->thread.xstate) {
WARN_ON(1);
return -EINVAL;
@@ -250,6 +250,13 @@ static int dump_task_struct_x86_64(struct kstate_context *ctx, struct task_struc
i->gsindex = encode_segment(tsk->thread.gsindex);
i->ss = encode_segment(regs->ss);
+ i->dr0 = tsk->thread.debugreg0;
+ i->dr1 = tsk->thread.debugreg1;
+ i->dr2 = tsk->thread.debugreg2;
+ i->dr3 = tsk->thread.debugreg3;
+ i->dr6 = tsk->thread.debugreg6;
+ i->dr7 = tsk->thread.debugreg7;
+
BUILD_BUG_ON(sizeof(tsk->thread.tls_array[0]) != 8);
BUILD_BUG_ON(sizeof(tsk->thread.tls_array) != 3 * 8);
memcpy(i->tls_array, tsk->thread.tls_array, sizeof(i->tls_array));
@@ -299,6 +306,17 @@ static int restore_task_struct_x86_64(struct task_struct *tsk, struct kstate_ima
tsk->thread.gsindex = decode_segment(i->gsindex);
regs->ss = decode_segment(i->ss);
+ tsk->thread.debugreg0 = i->dr0;
+ tsk->thread.debugreg1 = i->dr1;
+ tsk->thread.debugreg2 = i->dr2;
+ tsk->thread.debugreg3 = i->dr3;
+ tsk->thread.debugreg6 = i->dr6;
+ tsk->thread.debugreg7 = i->dr7;
+ if (i->dr7)
+ set_tsk_thread_flag(tsk, TIF_DEBUG);
+ else
+ clear_tsk_thread_flag(tsk, TIF_DEBUG);
+
memcpy(tsk->thread.tls_array, i->tls_array, sizeof(i->tls_array));
set_tsk_thread_flag(tsk, TIF_FORK);
--
1.5.6.5
next prev parent reply other threads:[~2009-05-22 5:01 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-22 4:54 [PATCH 01/38] cred: #include init.h in cred.h Alexey Dobriyan
2009-05-22 4:54 ` [PATCH 02/38] utsns: extract create_uts_ns() Alexey Dobriyan
2009-05-24 22:37 ` Serge E. Hallyn
2009-05-22 4:54 ` [PATCH 03/38] ipcns 1/4: remove useless get/put while CLONE_NEWIPC Alexey Dobriyan
2009-05-22 9:00 ` Amerigo Wang
2009-05-22 4:54 ` [PATCH 04/38] ipcns 2/4: extract create_ipc_ns() Alexey Dobriyan
2009-05-22 8:59 ` Amerigo Wang
2009-05-22 4:54 ` [PATCH 05/38] ipcns 3/4: make free_ipc_ns() static Alexey Dobriyan
2009-05-24 22:40 ` Serge E. Hallyn
2009-05-22 4:55 ` [PATCH 06/38] ipcns 4/2: move free_ipcs() proto Alexey Dobriyan
2009-05-24 22:49 ` Serge E. Hallyn
2009-05-22 4:55 ` [PATCH 07/38] pidns 1/2: make create_pid_namespace() accept parent pidns Alexey Dobriyan
2009-05-22 9:20 ` Amerigo Wang
2009-05-24 22:44 ` Serge E. Hallyn
2009-06-04 0:20 ` Sukadev Bhattiprolu
2009-05-22 4:55 ` [PATCH 08/38] pidns 2/2: rewrite copy_pid_ns() Alexey Dobriyan
2009-05-22 9:14 ` Amerigo Wang
2009-05-24 22:45 ` Serge E. Hallyn
2009-06-04 0:17 ` Sukadev Bhattiprolu
2009-05-22 4:55 ` [PATCH 09/38] netns 1/2: don't get/put old netns on CLONE_NEWNET Alexey Dobriyan
2009-05-22 6:30 ` David Miller
2009-05-22 4:55 ` [PATCH 10/38] netns 2/2: extract net_create() Alexey Dobriyan
2009-05-22 6:30 ` David Miller
2009-05-22 4:55 ` [PATCH 11/38] nsproxy: extract create_nsproxy() Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 12/38] i386: ifdef out struct thread_struct::fs Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 13/38] x86_64: ifdef out struct thread_struct::ip Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 14/38] Remove struct mm_struct::exe_file et al Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 15/38] dcache: extract and use d_unlinked() Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 16/38] x86: ptrace debugreg checks rewrite Alexey Dobriyan
2009-05-26 23:25 ` Andrew Morton
2009-05-22 4:55 ` [PATCH 17/38] groups: move code to kernel/groups.c Alexey Dobriyan
2009-05-25 0:53 ` Serge E. Hallyn
2009-05-26 14:48 ` Serge E. Hallyn
2009-05-26 18:34 ` Alexey Dobriyan
2009-05-26 23:25 ` Serge E. Hallyn
2009-05-22 4:55 ` [PATCH 18/38] C/R: core stuff Alexey Dobriyan
2009-05-26 13:16 ` Serge E. Hallyn
2009-05-26 19:35 ` Alexey Dobriyan
2009-05-26 23:14 ` Serge E. Hallyn
2009-05-26 23:44 ` Serge E. Hallyn
2009-05-28 15:38 ` Alexey Dobriyan
2009-05-28 18:17 ` Serge E. Hallyn
2009-05-28 22:42 ` Oren Laadan
2009-05-27 18:52 ` Dave Hansen
2009-05-27 20:56 ` Oren Laadan
2009-05-27 22:17 ` Alexey Dobriyan
2009-05-27 22:40 ` Andrew Morton
2009-05-27 22:45 ` Oren Laadan
2009-05-28 15:33 ` Alexey Dobriyan
2009-05-28 22:20 ` Oren Laadan
2009-05-28 22:33 ` Matt Helsley
2009-05-29 6:01 ` Alexey Dobriyan
2009-05-29 17:26 ` Dave Hansen
2009-05-27 22:25 ` Alexey Dobriyan
2009-05-27 16:28 ` Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 19/38] C/R: multiple tasks Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 20/38] C/R: i386 support Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 21/38] C/R: i386 debug registers Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 22/38] C/R: i386 xstate Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 23/38] C/R: x86_64 support Alexey Dobriyan
2009-05-22 4:55 ` Alexey Dobriyan [this message]
2009-05-22 4:55 ` [PATCH 25/38] C/R: x86_64 xstate Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 26/38] C/R: nsproxy Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 27/38] C/R: checkpoint/restore struct uts_namespace Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 28/38] C/R: formally checkpoint/restore struct ipc_namespace Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 29/38] C/R: formally checkpoint/restore struct mnt_namespace Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 30/38] C/R: checkpoint/restore struct pid_namespace Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 31/38] C/R: formally checkpoint/restore struct net_namespace Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 32/38] C/R: checkpoint/restore struct cred Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 33/38] C/R: checkpoint/restore aux groups (structy group_info) Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 34/38] C/R: checkpoint/restore struct user Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 35/38] C/R: checkpoint/restore struct user_namespace Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 36/38] C/R: checkpoint/restore struct pid Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 37/38] C/R: checkpoint/restore opened files Alexey Dobriyan
2009-05-22 4:55 ` [PATCH 38/38] C/R: checkpoint/restart struct sighand_struct Alexey Dobriyan
2009-05-22 5:02 ` [PATCH 01/38] cred: #include init.h in cred.h Alexey Dobriyan
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