Re: [PATCH v4 0/7] ptrace: introduce PTRACE_SET_SYSCALL_INFO API

Alexander Gordeev <[email protected]> Mon, 3 Feb 2025 10:29:37 +0100

Newsgroups	gmane.linux.ports.ppc.embedded,gmane.comp.sysutils.strace.devel,gmane.linux.kernel.arc,gmane.linux.kernel,gmane.linux.ports.arm.kernel,gmane.linux.ports.hexagon,gmane.linux.ports.mips,gmane.linux.ports.parisc,gmane.linux.ports.riscv,gmane.linux.ports.sh.devel,gmane.linux.ports.sparc,gmane.linux.uml.devel,gmane.linux.kernel.cross-arch,gmane.linux.kernel.api
Message-ID	<[email protected]>

On Mon, Feb 03, 2025 at 08:58:49AM +0200, Dmitry V. Levin wrote:

Hi Dmitry,

> PTRACE_SET_SYSCALL_INFO is a generic ptrace API that complements
> PTRACE_GET_SYSCALL_INFO by letting the ptracer modify details of
> system calls the tracee is blocked in.
...

FWIW, I am getting these on s390:

# ./tools/testing/selftests/ptrace/set_syscall_info 
TAP version 13
1..1
# Starting 1 tests from 1 test cases.
#  RUN           global.set_syscall_info ...
# set_syscall_info.c:87:set_syscall_info:Expected exp_entry->nr (-1) == info->entry.nr (65535)
# set_syscall_info.c:88:set_syscall_info:wait #3: PTRACE_GET_SYSCALL_INFO #2: syscall nr mismatch
# set_syscall_info: Test terminated by assertion
#          FAIL  global.set_syscall_info
not ok 1 global.set_syscall_info
# FAILED: 0 / 1 tests passed.
# Totals: pass:0 fail:1 xfail:0 xpass:0 skip:0 error:0

I remember one of the earlier versions (v1 or v2) was working for me.

Thanks!