diff --git a/include/linux/entry-common.h b/include/linux/entry-common.h
index ae426ab9c372d5bbf05c009b9a0817527eabb2d5..b30f82bed92b09022180617ce59e855efb367283 100644
--- a/include/linux/entry-common.h
+++ b/include/linux/entry-common.h
@@ -13,10 +13,6 @@
* Define dummy _TIF work flags if not defined by the architecture or for
* disabled functionality.
*/
-#ifndef _TIF_SYSCALL_EMU
-# define _TIF_SYSCALL_EMU (0)
-#endif
-
#ifndef _TIF_SYSCALL_AUDIT
# define _TIF_SYSCALL_AUDIT (0)
#endif
@@ -42,7 +38,6 @@
#define SYSCALL_ENTER_WORK \
(_TIF_SYSCALL_AUDIT | \
- _TIF_SYSCALL_EMU | \
ARCH_SYSCALL_ENTER_WORK)
/*
@@ -58,7 +53,8 @@
#define SYSCALL_WORK_ENTER (SYSCALL_WORK_SECCOMP | \
SYSCALL_WORK_SYSCALL_TRACEPOINT | \
- SYSCALL_WORK_SYSCALL_TRACE)
+ SYSCALL_WORK_SYSCALL_TRACE | \
+ SYSCALL_WORK_SYSCALL_EMU)
#define SYSCALL_WORK_EXIT (SYSCALL_WORK_SYSCALL_TRACEPOINT | \
SYSCALL_WORK_SYSCALL_TRACE)
diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index 761a4590d554fef7e522270f77dd0d81d8aa4b56..85b8a42161682d4904fae20edaef05f7b9080563 100644
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -39,11 +39,13 @@ enum syscall_work_bit {
SYSCALL_WORK_BIT_SECCOMP,
SYSCALL_WORK_BIT_SYSCALL_TRACEPOINT,
SYSCALL_WORK_BIT_SYSCALL_TRACE,
+ SYSCALL_WORK_BIT_SYSCALL_EMU,
};
#define SYSCALL_WORK_SECCOMP BIT(SYSCALL_WORK_BIT_SECCOMP)
#define SYSCALL_WORK_SYSCALL_TRACEPOINT BIT(SYSCALL_WORK_BIT_SYSCALL_TRACEPOINT)
#define SYSCALL_WORK_SYSCALL_TRACE BIT(SYSCALL_WORK_BIT_SYSCALL_TRACE)
+#define SYSCALL_WORK_SYSCALL_EMU BIT(SYSCALL_WORK_BIT_SYSCALL_EMU)
#include <asm/thread_info.h>
diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h
index 3f20368afe9e036ff1e510721b71e9f371771a23..54b925224a131c28c1fb254a6dff321beefcf696 100644
--- a/include/linux/tracehook.h
+++ b/include/linux/tracehook.h
@@ -84,7 +84,7 @@ static inline int ptrace_report_syscall(struct pt_regs *regs,
* @regs: user register state of current task
*
* This will be called if %SYSCALL_WORK_SYSCALL_TRACE or
- * %TIF_SYSCALL_EMU have been set, when the current task has just
+ * %SYSCALL_WORK_SYSCALL_EMU have been set, when the current task has just
* entered the kernel for a system call. Full user register state is
* available here. Changing the values in @regs can affect the system
* call number and arguments to be tried. It is safe to block here,
diff --git a/kernel/entry/common.c b/kernel/entry/common.c
index 917328a9edaaa07c0e257bb4b5ac65ec4547b1a6..90533f34ea99c81e872e33a2153c9c510ab2c4ba 100644
--- a/kernel/entry/common.c
+++ b/kernel/entry/common.c
@@ -47,9 +47,9 @@ static long syscall_trace_enter(struct pt_regs *regs, long syscall,
long ret = 0;
/* Handle ptrace */
- if (work & SYSCALL_WORK_SYSCALL_TRACE || ti_work & _TIF_SYSCALL_EMU) {
+ if (work & (SYSCALL_WORK_SYSCALL_TRACE | SYSCALL_WORK_SYSCALL_EMU)) {
ret = arch_syscall_enter_tracehook(regs);
- if (ret || (ti_work & _TIF_SYSCALL_EMU))
+ if (ret || (work & SYSCALL_WORK_SYSCALL_EMU))
return -1L;
}
@@ -208,21 +208,22 @@ static void exit_to_user_mode_prepare(struct pt_regs *regs)
}
#ifndef _TIF_SINGLESTEP
-static inline bool report_single_step(unsigned long ti_work)
+static inline bool report_single_step(unsigned long work)
{
return false;
}
#else
/*
- * If TIF_SYSCALL_EMU is set, then the only reason to report is when
+ * If SYSCALL_EMU is set, then the only reason to report is when
* TIF_SINGLESTEP is set (i.e. PTRACE_SYSEMU_SINGLESTEP). This syscall
* instruction has been already reported in syscall_enter_from_user_mode().
*/
-#define SYSEMU_STEP (_TIF_SINGLESTEP | _TIF_SYSCALL_EMU)
-
-static inline bool report_single_step(unsigned long ti_work)
+static inline bool report_single_step(unsigned long work)
{
- return (ti_work & SYSEMU_STEP) == _TIF_SINGLESTEP;
+ if (!(work & SYSCALL_WORK_SYSCALL_EMU))
+ return false;
+
+ return !!(current_thread_info()->flags & _TIF_SINGLESTEP);
}
#endif
@@ -236,7 +237,7 @@ static void syscall_exit_work(struct pt_regs *regs, unsigned long ti_work,
if (work & SYSCALL_WORK_SYSCALL_TRACEPOINT)
trace_sys_exit(regs, syscall_get_return_value(current, regs));
- step = report_single_step(ti_work);
+ step = report_single_step(work);
if (step || work & SYSCALL_WORK_SYSCALL_TRACE)
arch_syscall_exit_tracehook(regs, step);
}
diff --git a/kernel/fork.c b/kernel/fork.c
index 99f68c20f2ff5e62ae62bccced615cc96fdd3ad6..02b689a23457f26e0e8beafb29938b31c0c613f0 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2159,8 +2159,8 @@ static __latent_entropy struct task_struct *copy_process(
*/
user_disable_single_step(p);
clear_task_syscall_work(p, SYSCALL_TRACE);
-#ifdef TIF_SYSCALL_EMU
- clear_tsk_thread_flag(p, TIF_SYSCALL_EMU);
+#if defined(CONFIG_GENERIC_ENTRY) || defined(TIF_SYSCALL_EMU)
+ clear_task_syscall_work(p, SYSCALL_EMU);
#endif
clear_tsk_latency_tracing(p);
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 55a2bc3186a7ab8b40f88514bc3df02dc5daf32e..237bcd6d255c6cbe394b50760b90015b71b935bd 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -118,8 +118,8 @@ void __ptrace_unlink(struct task_struct *child)
BUG_ON(!child->ptrace);
clear_task_syscall_work(child, SYSCALL_TRACE);
-#ifdef TIF_SYSCALL_EMU
- clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
+#if defined(CONFIG_GENERIC_ENTRY) || defined(TIF_SYSCALL_EMU)
+ clear_task_syscall_work(child, SYSCALL_EMU);
#endif
child->parent = child->real_parent;
@@ -816,11 +816,11 @@ static int ptrace_resume(struct task_struct *child, long request,
else
clear_task_syscall_work(child, SYSCALL_TRACE);
-#ifdef TIF_SYSCALL_EMU
+#if defined(CONFIG_GENERIC_ENTRY) || defined(TIF_SYSCALL_EMU)
if (request == PTRACE_SYSEMU || request == PTRACE_SYSEMU_SINGLESTEP)
- set_tsk_thread_flag(child, TIF_SYSCALL_EMU);
+ set_task_syscall_work(child, SYSCALL_EMU);
else
- clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
+ clear_task_syscall_work(child, SYSCALL_EMU);
#endif
if (is_singleblock(request)) {