diff options
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/sys/procctl.2 | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/libc/sys/procctl.2 b/lib/libc/sys/procctl.2 index 432ed5919a81..ce7a2be5d5e4 100644 --- a/lib/libc/sys/procctl.2 +++ b/lib/libc/sys/procctl.2 @@ -454,6 +454,16 @@ and the .Va si_code member is set to .Dv TRAP_CAP . +The system call number is stored in the +.Va si_syscall +field of the +.Fa siginfo +signal handler parameter. +The other system call parameters can be read from the +.Fa ucontext_t +but the system call number is typically stored in the register +that also contains the return value and so is unavailable in the +signal handler. .Pp See .Xr capsicum 4 |