On Wed, Oct 27, 2021 at 07:50:55 -0700, Jason Thorpe wrote: > > On Oct 18, 2021, at 9:41 AM, John Marino (NetBSD) <net...@marino.st> wrote: > > > > yes, it sounds like a __in_signal_trampoline function would work for > > the GCC unwind, and I would think it would work for GDB as well. > > Ok, I have implemented a new function with this signature: > > /* > * __sigtramp_check_np -- > * > * Non-portable function that checks if the specified program > * counter value is within the signal return trampoline. Returns > * the trampoline version numnber corresponding to what style of > * trampoline it matches, or -1 if the program value is not within > * the signal return trampoline. > */ > int __sigtramp_check_np(void *pc); > > Usage would be like: [... lots of code ...]
I was wondering if it might be easier to not put the onus onto the caller and instead have a function that returns the interrupted ucontext (or NULL, if the pc is not in a trampoline). ucontext_t *__unwind_sigtramp(return_pc, return_sp) -uwe
