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| author |   Sergey Matyukevich <sergey.matyukevich@synopsys.com> | 2022-04-14 11:17:23 +0300 |
|---|---|---|
| committer |   Vineet Gupta <vgupta@kernel.org> | 2022-04-25 13:09:47 -0700 |
| commit | fb0b54909b153ac6195378fa8ddee3f7531f8e51 (patch) | |
| tree | 7d74e0f30de818900f5b8f9a4e160ac96e64b593 /arch/arc/kernel | |
| parent | ARC: enable HAVE_REGS_AND_STACK_ACCESS_API feature (diff) | |
| download | linux-dev-fb0b54909b153ac6195378fa8ddee3f7531f8e51.tar.xz linux-dev-fb0b54909b153ac6195378fa8ddee3f7531f8e51.zip | |
ARC: implement syscall tracepoints
Implement all the bits required to support HAVE_SYSCALL_TRACEPOINTS
according to Documentation/trace/ftrace-design.rst.
Signed-off-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
Diffstat (limited to 'arch/arc/kernel')
| -rw-r--r-- | arch/arc/kernel/entry.S | 12 | ||||
| -rw-r--r-- | arch/arc/kernel/ptrace.c | 21 |
2 files changed, 24 insertions, 9 deletions
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index 66ba549b520f..54e91df678dd 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -29,8 +29,8 @@ ENTRY(sys_clone_wrapper) DISCARD_CALLEE_SAVED_USER GET_CURR_THR_INFO_FLAGS r10 - btst r10, TIF_SYSCALL_TRACE - bnz tracesys_exit + and.f 0, r10, _TIF_SYSCALL_WORK + bnz tracesys_exit b .Lret_from_system_call END(sys_clone_wrapper) @@ -41,8 +41,8 @@ ENTRY(sys_clone3_wrapper) DISCARD_CALLEE_SAVED_USER GET_CURR_THR_INFO_FLAGS r10 - btst r10, TIF_SYSCALL_TRACE - bnz tracesys_exit + and.f 0, r10, _TIF_SYSCALL_WORK + bnz tracesys_exit b .Lret_from_system_call END(sys_clone3_wrapper) @@ -247,8 +247,8 @@ ENTRY(EV_Trap) ; If syscall tracing ongoing, invoke pre-post-hooks GET_CURR_THR_INFO_FLAGS r10 - btst r10, TIF_SYSCALL_TRACE - bnz tracesys ; this never comes back + and.f 0, r10, _TIF_SYSCALL_WORK + bnz tracesys ; this never comes back ;============ Normal syscall case diff --git a/arch/arc/kernel/ptrace.c b/arch/arc/kernel/ptrace.c index 5fa5bceb83f3..da7542cea0d8 100644 --- a/arch/arc/kernel/ptrace.c +++ b/arch/arc/kernel/ptrace.c @@ -9,6 +9,9 @@ #include <linux/unistd.h> #include <linux/elf.h> +#define CREATE_TRACE_POINTS +#include <trace/events/syscalls.h> + struct pt_regs_offset { const char *name; int offset; @@ -340,15 +343,27 @@ long arch_ptrace(struct task_struct *child, long request, asmlinkage int syscall_trace_entry(struct pt_regs *regs) { - if (ptrace_report_syscall_entry(regs)) - return ULONG_MAX; + if (test_thread_flag(TIF_SYSCALL_TRACE)) + if (ptrace_report_syscall_entry(regs)) + return ULONG_MAX; + +#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_enter(regs, syscall_get_nr(current, regs)); +#endif return regs->r8; } asmlinkage void syscall_trace_exit(struct pt_regs *regs) { - ptrace_report_syscall_exit(regs, 0); + if (test_thread_flag(TIF_SYSCALL_TRACE)) + ptrace_report_syscall_exit(regs, 0); + +#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_exit(regs, regs_return_value(regs)); +#endif } int regs_query_register_offset(const char *name) |