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authorSudeep Holla <sudeep.holla@arm.com>2019-05-23 11:06:18 +0200
committerCatalin Marinas <catalin.marinas@arm.com>2019-06-05 18:51:24 +0200
commitf086f67485c5c126bcec4b0e96ac7319a2e59ab8 (patch)
treea2eb3fe5a7af74710dfae1556b8115ef088a14eb /arch/arm64/include/asm/thread_info.h
parentarm64: add PTRACE_SYSEMU{,SINGLESTEP} definations to uapi headers (diff)
downloadlinux-f086f67485c5c126bcec4b0e96ac7319a2e59ab8.tar.xz
linux-f086f67485c5c126bcec4b0e96ac7319a2e59ab8.zip
arm64: ptrace: add support for syscall emulation
Add PTRACE_SYSEMU and PTRACE_SYSEMU_SINGLESTEP support on arm64. We don't need any special handling for PTRACE_SYSEMU_SINGLESTEP. It's quite difficult to generalize handling PTRACE_SYSEMU cross architectures and avoid calls to tracehook_report_syscall_entry twice. Different architecture have different mechanism to indicate NO_SYSCALL and trying to generalise adds more code for no gain. Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/thread_info.h')
-rw-r--r--arch/arm64/include/asm/thread_info.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h
index eb3ef73e07cf..c285d1ce7186 100644
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -75,6 +75,7 @@ void arch_release_task_struct(struct task_struct *tsk);
* TIF_SYSCALL_TRACE - syscall trace active
* TIF_SYSCALL_TRACEPOINT - syscall tracepoint for ftrace
* TIF_SYSCALL_AUDIT - syscall auditing
+ * TIF_SYSCALL_EMU - syscall emulation active
* TIF_SECOMP - syscall secure computing
* TIF_SIGPENDING - signal pending
* TIF_NEED_RESCHED - rescheduling necessary
@@ -91,6 +92,7 @@ void arch_release_task_struct(struct task_struct *tsk);
#define TIF_SYSCALL_AUDIT 9
#define TIF_SYSCALL_TRACEPOINT 10
#define TIF_SECCOMP 11
+#define TIF_SYSCALL_EMU 12
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
#define TIF_FREEZE 19
#define TIF_RESTORE_SIGMASK 20
@@ -109,6 +111,7 @@ void arch_release_task_struct(struct task_struct *tsk);
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
+#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
#define _TIF_UPROBE (1 << TIF_UPROBE)
#define _TIF_FSCHECK (1 << TIF_FSCHECK)
#define _TIF_32BIT (1 << TIF_32BIT)
@@ -120,7 +123,7 @@ void arch_release_task_struct(struct task_struct *tsk);
#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
_TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
- _TIF_NOHZ)
+ _TIF_NOHZ | _TIF_SYSCALL_EMU)
#define INIT_THREAD_INFO(tsk) \
{ \