From 8bc792b3845ecf64145fda7964a7b5cc54dea777 Mon Sep 17 00:00:00 2001 From: Mitchell Horne Date: Thu, 25 Nov 2021 11:54:33 -0400 Subject: [PATCH] i386: take pcb and fpu area into account in GET_STACK_USAGE On this platform, the pcb and FPU save area are allocated from the top of each kernel stack, so they should be excluded from the calculation of the total and used stack sizes. Reviewed by: kib MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D32581 --- sys/i386/include/proc.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/sys/i386/include/proc.h b/sys/i386/include/proc.h index 76e1ac61147..26149a6640c 100644 --- a/sys/i386/include/proc.h +++ b/sys/i386/include/proc.h @@ -71,13 +71,13 @@ struct syscall_args { #ifdef _KERNEL +#include + /* Get the current kernel thread stack usage. */ #define GET_STACK_USAGE(total, used) do { \ struct thread *td = curthread; \ - (total) = td->td_kstack_pages * PAGE_SIZE; \ - (used) = (char *)td->td_kstack + \ - td->td_kstack_pages * PAGE_SIZE - \ - (char *)&td; \ + (total) = (vm_offset_t)get_pcb_td(td) - td->td_kstack; \ + (used) = (vm_offset_t)get_pcb_td(td) - (vm_offset_t)&td; \ } while (0) void set_user_ldt(struct mdproc *);