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authorLi Zhong <zhong@linux.vnet.ibm.com>2013-05-13 16:16:40 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-05-14 16:00:19 +1000
commit22ecbe8dcef4f6bf80ed4358600e8f6e03105c5c (patch)
tree05db211a20ad42597c947f3612b402e581a0c858 /arch/powerpc/kernel
parent6cecf76b47ba6bea3c81d170afc2e0b244e5849c (diff)
downloadlinux-bcache-22ecbe8dcef4f6bf80ed4358600e8f6e03105c5c.tar.zst
powerpc: Syscall hooks for context tracking subsystem
This is the syscall slow path hooks for context tracking subsystem, corresponding to [PATCH] x86: Syscall hooks for userspace RCU extended QS commit bf5a3c13b939813d28ce26c01425054c740d6731 TIF_MEMDIE is moved to the second 16-bits (with value 17), as it seems there is no asm code using it. TIF_NOHZ is added to _TIF_SYCALL_T_OR_A, so it is better for it to be in the same 16 bits with others in the group, so in the asm code, andi. with this group could work. Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/ptrace.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 3b14d320e69f..98c2fc198712 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -32,6 +32,7 @@
#include <trace/syscall.h>
#include <linux/hw_breakpoint.h>
#include <linux/perf_event.h>
+#include <linux/context_tracking.h>
#include <asm/uaccess.h>
#include <asm/page.h>
@@ -1788,6 +1789,8 @@ long do_syscall_trace_enter(struct pt_regs *regs)
{
long ret = 0;
+ user_exit();
+
secure_computing_strict(regs->gpr[0]);
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
@@ -1832,4 +1835,6 @@ void do_syscall_trace_leave(struct pt_regs *regs)
step = test_thread_flag(TIF_SINGLESTEP);
if (step || test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(regs, step);
+
+ user_enter();
}