diff options
| author | Michael Schmitz <schmitzmic@gmail.com> | 2023-01-12 16:55:27 +1300 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2023-01-30 16:40:15 +0100 |
| commit | 2ca8a1de4437f21562e57f9ac123914747a8e7a1 (patch) | |
| tree | 77a39d4d3d30e6bb302482738321329cd972b290 /arch/m68k/kernel/entry.S | |
| parent | 65a1601609e542e2f392213b121146762edfc19d (diff) | |
m68k: Check syscall_trace_enter() return code
Check return code of syscall_trace_enter(), and skip syscall
if -1. Return code will be left at what had been set by
ptrace or seccomp (in regs->d0).
No regression seen in testing with strace on ARAnyM.
Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20230112035529.13521-2-schmitzmic@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/kernel/entry.S')
| -rw-r--r-- | arch/m68k/kernel/entry.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S index 18f278bdbd21..42879e6eb651 100644 --- a/arch/m68k/kernel/entry.S +++ b/arch/m68k/kernel/entry.S @@ -184,9 +184,12 @@ do_trace_entry: jbsr syscall_trace_enter RESTORE_SWITCH_STACK addql #4,%sp + addql #1,%d0 | optimization for cmpil #-1,%d0 + jeq ret_from_syscall movel %sp@(PT_OFF_ORIG_D0),%d0 cmpl #NR_syscalls,%d0 jcs syscall + jra ret_from_syscall badsys: movel #-ENOSYS,%sp@(PT_OFF_D0) jra ret_from_syscall |