diff options
| author | Thomas Weißschuh <thomas.weissschuh@linutronix.de> | 2025-07-03 14:38:55 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2025-07-11 08:49:02 +0200 |
| commit | 2a713f04eddd97f5893de73b1ccd789e69ac0a8d (patch) | |
| tree | e70eb9908e0b53fbecb3ced86937a60fae694257 | |
| parent | 32a15664efe9b44b64a7179b47cc7742af5098c2 (diff) | |
um/ptrace: Implement HAVE_SYSCALL_TRACEPOINTS
Implement syscall tracepoints through the generic tracing infrastructure.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Nam Cao <namcao@linutronix.de>
Link: https://patch.msgid.link/20250703-uml-have_syscall_tracepoints-v1-2-23c1d3808578@linutronix.de
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | arch/um/Kconfig | 1 | ||||
| -rw-r--r-- | arch/um/include/asm/thread_info.h | 2 | ||||
| -rw-r--r-- | arch/um/kernel/ptrace.c | 9 |
3 files changed, 12 insertions, 0 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig index f08e8a7fac93..c2d2d2d99bbe 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -35,6 +35,7 @@ config UML select HAVE_RUST select ARCH_HAS_UBSAN select HAVE_ARCH_TRACEHOOK + select HAVE_SYSCALL_TRACEPOINTS select THREAD_INFO_IN_TASK config MMU diff --git a/arch/um/include/asm/thread_info.h b/arch/um/include/asm/thread_info.h index f9ad06fcc991..b8c021f97bd1 100644 --- a/arch/um/include/asm/thread_info.h +++ b/arch/um/include/asm/thread_info.h @@ -43,6 +43,8 @@ struct thread_info { #define TIF_NOTIFY_RESUME 8 #define TIF_SECCOMP 9 /* secure computing */ #define TIF_SINGLESTEP 10 /* single stepping userspace */ +#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */ + #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c index 2124624b7817..fdbb37b5c399 100644 --- a/arch/um/kernel/ptrace.c +++ b/arch/um/kernel/ptrace.c @@ -9,6 +9,9 @@ #include <linux/uaccess.h> #include <asm/ptrace-abi.h> +#define CREATE_TRACE_POINTS +#include <trace/events/syscalls.h> + void user_enable_single_step(struct task_struct *child) { set_tsk_thread_flag(child, TIF_SINGLESTEP); @@ -126,6 +129,9 @@ int syscall_trace_enter(struct pt_regs *regs) UPT_SYSCALL_ARG3(®s->regs), UPT_SYSCALL_ARG4(®s->regs)); + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_enter(regs, UPT_SYSCALL_NR(®s->regs)); + if (!test_thread_flag(TIF_SYSCALL_TRACE)) return 0; @@ -142,6 +148,9 @@ void syscall_trace_leave(struct pt_regs *regs) if (test_thread_flag(TIF_SINGLESTEP)) send_sigtrap(®s->regs, 0); + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_exit(regs, PT_REGS_SYSCALL_RET(regs)); + if (!test_thread_flag(TIF_SYSCALL_TRACE)) return; |