08:05 <mator> wanted to test "Allow seccomp filter to work without -f" but it doesn't support sparc :)

08:06 <mator> seccomp_bpf.c:1609:3: error: #error "Do not know how to find your architecture's registers and syscalls"

08:06 <mator> gcc -Wl,-no-as-needed -Wall seccomp_bpf.c -lpthread -o seccomp_bpf

08:06 <mator> ~/linux-2.6/tools/testing/selftests/seccomp$ make

09:20 <pchaigno> mator: it looks like you just need to extend that code with the macros for sparc

09:20 <pchaigno> ARCH_REGS should be pt_regs, but I don't know which registers hold the syscall number and return code on sparc

09:48 <ldv> strace knows :)

09:48 <mator> pchaigno, i've no idea as well

09:58 <pchaigno> mator: if I understand this correctly, the following should be your register with the syscall number: https://github.com/strace/strace/blob/92e347b556bb183ebaaf6fedb839da222c8c67b4/linux/sparc/get_scno.c#L12

10:00 <pchaigno> and this is likely the register with the return code: https://github.com/strace/strace/blob/a8dc094bd432a28df6b0418b7140b2467bc078bf/linux/sparc/set_error.c#L12

21:05 <jrtc27> https://manpages.debian.org/buster/manpages-dev/syscall.2.en.html has a nice table

21:06 <jrtc27> ie follows the normal integer calling convention, with the syscall number separate in g1, and the carry status bit indicates whether the return value is an error code