On 06/20, Liao, Chang wrote: > > However, when i asm porting uretprobe trampoline to arm64 > to explore its benefits on that architecture, i discovered the problem that > single slot is not large enought for trampoline code. Ah, but then I'd suggest to make the changelog more clear. It looks as if the problem was introduced by the patch from Jiri. Note that we was confused as well ;) And, + /* Reserve enough slots for the uretprobe trampoline */ + for (slot_nr = 0; + slot_nr < max((insns_size / UPROBE_XOL_SLOT_BYTES), 1); + slot_nr++) this doesn't look right. Just suppose that insns_size = UPROBE_XOL_SLOT_BYTES + 1. I'd suggest DIV_ROUND_UP(insns_size, UPROBE_XOL_SLOT_BYTES). And perhaps it would be better to send this change along with uretprobe_trampoline_for_arm64 ? Oleg.
