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Now that the GDT has been reorganized and GNDIS_SEL has been reserved

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for us, use it if it's available, otherwise default to using slot 7
as before.
This commit is contained in:
Bill Paul 2005-04-17 19:36:08 +00:00
parent 71526784e9
commit 427fea0ba6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=145205
1 changed files with 17 additions and 1 deletions
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18
sys/compat/ndis/kern_windrv.c
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@ -52,6 +52,10 @@ __FBSDID("$FreeBSD$");
#include <sys/queue.h>
#ifdef __i386__
#include <machine/segments.h>
#endif
#include <compat/ndis/pe_var.h>
#include <compat/ndis/cfg_var.h>
#include <compat/ndis/resource_var.h>
@ -545,7 +549,19 @@ extern void x86_setldt(struct gdt *, uint16_t);
#define SEL_LDT 4 /* local descriptor table */
#define SEL_TO_FS(x) (((x) << 3))
#define FREEBSD_EMPTYSEL 7
/*
* FreeBSD 6.0 and later has a special GDT segment reserved
* specifically for us, so if GNDIS_SEL is defined, use that.
* If not, use GTGATE_SEL, which is uninitialized and infrequently
* used.
*/
#ifdef GNDIS_SEL
#define FREEBSD_EMPTYSEL GNDIS_SEL
#else
#define FREEBSD_EMPTYSEL GTGATE_SEL /* slot 7 */
#endif
/*
* The meanings of various bits in a descriptor vary a little