diff options
| author | Benjamin Berg <benjamin@sipsolutions.net> | 2023-11-10 12:03:38 +0100 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2024-01-04 23:29:11 +0100 |
| commit | a55719847da0a780baa84d0baee745358f144c39 (patch) | |
| tree | 900cd94ee627fbac7cec0469fdc12a46a92057ff /arch/um/kernel/signal.c | |
| parent | a8e75902f4d7d342350ea3f79e3e65f2bbfa4c8d (diff) | |
um: Drop support for hosts without SYSEMU_SINGLESTEP support
These features have existed since Linux 2.6.14 and can be considered
widely available at this point. Also drop the backward compatibility
code for PTRACE_SETOPTIONS.
Signed-off-by: Benjamin Berg <benjamin@sipsolutions.net>
----
v2:
* Continue to define PTRACE_SYSEMU_SINGLESTEP as glibc only added it in
version 2.27.
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/kernel/signal.c')
| -rw-r--r-- | arch/um/kernel/signal.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c index ae4658f576ab..a56b44522766 100644 --- a/arch/um/kernel/signal.c +++ b/arch/um/kernel/signal.c @@ -121,18 +121,6 @@ void do_signal(struct pt_regs *regs) } /* - * This closes a way to execute a system call on the host. If - * you set a breakpoint on a system call instruction and singlestep - * from it, the tracing thread used to PTRACE_SINGLESTEP the process - * rather than PTRACE_SYSCALL it, allowing the system call to execute - * on the host. The tracing thread will check this flag and - * PTRACE_SYSCALL if necessary. - */ - if (test_thread_flag(TIF_SINGLESTEP)) - current->thread.singlestep_syscall = - is_syscall(PT_REGS_IP(¤t->thread.regs)); - - /* * if there's no signal to deliver, we just put the saved sigmask * back */ |