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| author |   Sven Schnelle <svens@linux.ibm.com> | 2020-03-09 16:44:50 +0100 |
|---|---|---|
| committer |   Vasily Gorbik <gor@linux.ibm.com> | 2020-06-16 13:44:04 +0200 |
| commit | 873e5a763d604c32988c4a78913a8dab3862d2f9 (patch) | |
| tree | b9f89c12afdd3f5268c507b9424fadb922c9f9c5 /tools/testing/selftests | |
| parent | s390/ptrace: pass invalid syscall numbers to tracing (diff) | |
| download | wireguard-linux-873e5a763d604c32988c4a78913a8dab3862d2f9.tar.xz wireguard-linux-873e5a763d604c32988c4a78913a8dab3862d2f9.zip | |
s390/ptrace: fix setting syscall number
When strace wants to update the syscall number, it sets GPR2
to the desired number and updates the GPR via PTRACE_SETREGSET.
It doesn't update regs->int_code which would cause the old syscall
executed on syscall restart. As we cannot change the ptrace ABI and
don't have a field for the interruption code, check whether the tracee
is in a syscall and the last instruction was svc. In that case assume
that the tracer wants to update the syscall number and copy the GPR2
value to regs->int_code.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'tools/testing/selftests')
0 files changed, 0 insertions, 0 deletions