On Wed, Mar 20, 2024 at 11:41:34PM +0800, Jiangfeng Xiao wrote: > This is an off-by-one bug which is common in unwinders, > due to the fact that the address on the stack points > to the return address rather than the call address. > > So, for example, when the last instruction of a function > is a function call (e.g., to a noreturn function), it can > cause the unwinder to incorrectly try to unwind from > the function after the callee. > > foo: > ... > bl bar > ... end of function and thus next function ... > > which results in LR pointing into the next function. > > Fixed this by subtracting 1 from frmae->pc in the call frame > like ORC on x86 does. > > Refer to the unwind_next_frame function in the unwind_orc.c This came in while I was still replying to your previous reply, so I'm going to ignore this. Please allow at least 24 hours between postings, and please allow discussion to finish before posting a new version - give your reviewers adequate time to compose a reply bearing in mind that timezones might get in the way, but also making supper (as is the case in this instance) may cause several hour delay in reply. Thanks. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!
