On Tue, 4 May 2021 at 23:13, Eric W. Biederman <ebiederm@xxxxxxxxxxxx> wrote: > > This set of changes sorts out the ABI issues with SIGTRAP TRAP_PERF, and > hopefully will can get merged before any userspace code starts using the > new ABI. > > The big ideas are: > - Placing the asserts first to prevent unexpected ABI changes > - si_trapno becomming ordinary fault subfield. > - struct signalfd_siginfo is almost full > > This set of changes starts out with Marco's static_assert changes and > additional one of my own that enforces the fact that the alignment of > siginfo_t is also part of the ABI. Together these build time > checks verify there are no unexpected ABI changes in the changes > that follow. > > The field si_trapno is changed to become an ordinary extension of the > _sigfault member of siginfo. > > The code is refactored a bit and then si_perf_type is added along side > si_perf_data in the _perf subfield of _sigfault of siginfo_t. > > Finally the signalfd_siginfo fields are removed as they appear to be > filling up the structure without userspace actually being able to use > them. > > v2: https://lkml.kernel.org/r/m14kfjh8et.fsf_-_@xxxxxxxxxxxxxxxxx > v1: https://lkml.kernel.org/r/m1zgxfs7zq.fsf_-_@xxxxxxxxxxxxxxxxx > > Eric W. Biederman (9): > signal: Verify the alignment and size of siginfo_t > siginfo: Move si_trapno inside the union inside _si_fault > signal: Implement SIL_FAULT_TRAPNO > signal: Use dedicated helpers to send signals with si_trapno set > signal: Remove __ARCH_SI_TRAPNO > signal: Rename SIL_PERF_EVENT SIL_FAULT_PERF_EVENT for consistency > signal: Factor force_sig_perf out of perf_sigtrap > signal: Deliver all of the siginfo perf data in _perf > signalfd: Remove SIL_FAULT_PERF_EVENT fields from signalfd_siginfo > > Marco Elver (3): > sparc64: Add compile-time asserts for siginfo_t offsets > arm: Add compile-time asserts for siginfo_t offsets > arm64: Add compile-time asserts for siginfo_t offsets I can't seem to see the rest of them in my inbox. LKML also is missing them: https://lore.kernel.org/linux-api/m1tuni8ano.fsf_-_@xxxxxxxxxxxxxxxxx/ Something must have swallowed them. Could you resend? I'll then test in the morning. Thanks, -- Marco
