On Jun 16 2021, Michael Schmitz wrote:
m68k (other than Coldfire) uses syscall_trace for both trace entry and trace exit. Seccomp support requires separate entry points for trace entry and exit which are already provided for Coldfire. Replace syscall_trace by syscall_trace_enter and syscall_trace_leave in preparation for seccomp support. Check return code of syscall_trace_enter(), and skip syscall if -1. Return code will be left at what had been set by by ptrace or seccomp (in regs->d0).
s/by by/by/
diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S index 9dd76fb..e949b66 100644 --- a/arch/m68k/kernel/entry.S +++ b/arch/m68k/kernel/entry.S @@ -164,9 +164,11 @@ do_trace_entry: movel #-ENOSYS,%sp@(PT_OFF_D0)| needed for strace subql #4,%sp SAVE_SWITCH_STACK - jbsr syscall_trace + jbsr syscall_trace_enter RESTORE_SWITCH_STACK addql #4,%sp + cmpil #-1,%d0
That can be optimized as addql #1,%d0.
+ jeq ret_from_syscall
Andreas. -- Andreas Schwab, schwab@xxxxxxxxxxxxxx GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."
