On 23/05/2024 6:03 pm, Alexandre Chartre wrote: > > On 5/23/24 17:36, Dave Hansen wrote: >> On 5/23/24 07:52, Alexandre Chartre wrote: >>>> Should we wrap up this gem and put it with the other entry selftests? >>> >>> It looks like tools/testing/selftests/x86/single_step_syscall.c tests >>> sysenter with TF set but it doesn't check if the kernel issues any >>> warning. >> >> Does it actually trip the warning though? I'm a bit surprised that >> nobody reported it if so. > > single_step_syscall does trigger the warning: > > $ ./single_step_syscall > [RUN] Set TF and check nop > [OK] Survived with TF set and 26 traps > [RUN] Set TF and check syscall-less opportunistic sysret > [OK] Survived with TF set and 30 traps > [RUN] Set TF and check a fast syscall > [OK] Survived with TF set and 40 traps > [RUN] Fast syscall with TF cleared > [OK] Nothing unexpected happened > [RUN] Set TF and check SYSENTER > Got SIGSEGV with RIP=ed7fe579, TF=256 > [RUN] Fast syscall with TF cleared > [OK] Nothing unexpected happened :-/ What about the exit code? I find the absence of a [FAIL] concerning... ~Andrew
