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authorEric W. Biederman <ebiederm@xmission.com>2021-12-21 01:29:29 +0300
committerEric W. Biederman <ebiederm@xmission.com>2022-01-08 21:43:58 +0300
commita403df29789ba38796edb97dad9bfb47836b68c0 (patch)
treed17357e0ebdb94abd4e954e6740fbe4a2452dc07 /arch/m68k
parent4264178416cd52a55a3eccbefb3973866e060280 (diff)
downloadlinux-a403df29789ba38796edb97dad9bfb47836b68c0.tar.xz
ptrace/m68k: Stop open coding ptrace_report_syscall
The generic function ptrace_report_syscall does a little more than syscall_trace on m68k. The function ptrace_report_syscall stops early if PT_TRACED is not set, it sets ptrace_message, and returns the result of fatal_signal_pending. Setting ptrace_message to a passed in value of 0 is effectively not setting ptrace_message, making that additional work a noop. Returning the result of fatal_signal_pending and letting the caller ignore the result becomes a noop in this change. When a process is ptraced, the flag PT_PTRACED is always set in current->ptrace. Testing for PT_PTRACED in ptrace_report_syscall is just an optimization to fail early if the process is not ptraced. Later on in ptrace_notify, ptrace_stop will test current->ptrace under tasklist_lock and skip performing any work if the task is not ptraced. Cc: Geert Uytterhoeven <geert@linux-m68k.org> Link: https://lkml.kernel.org/r/20220103213312.9144-8-ebiederm@xmission.com Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/kernel/ptrace.c12
1 files changed, 1 insertions, 11 deletions
diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c
index 94b3b274186d..aa3a0b8d07e9 100644
--- a/arch/m68k/kernel/ptrace.c
+++ b/arch/m68k/kernel/ptrace.c
@@ -273,17 +273,7 @@ out_eio:
asmlinkage void syscall_trace(void)
{
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
- ? 0x80 : 0));
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
- if (current->exit_code) {
- send_sig(current->exit_code, current, 1);
- current->exit_code = 0;
- }
+ ptrace_report_syscall(0);
}
#if defined(CONFIG_COLDFIRE) || !defined(CONFIG_MMU)