Expose kernel-only errno values if _WANT_KERNEL_ERRNO is defined.

The kernel uses a few negative errno values for internal conditions
such as requesting a system call restart.  Normally these errno values
are not exposed to userland.  However, kdump needs access to these
values as some of then can be present in a ktrace system call return
record.  Previously kdump was defining _KERNEL to gain access to ehse
values, but was then having to manually declare 'errno' (and doing it
incorrectly).  Now, kdump uses _WANT_KERNEL_ERRNO instead of _KERNEL
and uses the system-provided declaration of errno.

This commit is contained in:

John Baldwin

2016-10-01 22:08:07 +00:00

parent 8dec694290

commit 406d2926f2

2 changed files with 2 additions and 5 deletions

									
										usr.bin/kdump/kdump.c
									
		+1
		-4
	
												View File
												
				@@ -41,10 +41,7 @@ static char sccsid[] = "@(#)kdump.c	8.1 (Berkeley) 6/6/93";

				#include <sys/cdefs.h>

				__FBSDID("$FreeBSD$");

				#define _KERNEL

				extern int errno;

				#include <sys/errno.h>

				#undef _KERNEL

				#define _WANT_KERNEL_ERRNO

				#include <sys/param.h>

				#include <sys/capsicum.h>

				#include <sys/errno.h>