Commit 8bc792b3 authored by Mitchell Horne's avatar Mitchell Horne
Browse files

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
parent b394e16e
......@@ -71,13 +71,13 @@ struct syscall_args {
#ifdef _KERNEL
#include <machine/md_var.h>
/* 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 *);
......
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