diff options
Diffstat (limited to 'sys/arch/amd64/include/segments.h')
| -rw-r--r-- | sys/arch/amd64/include/segments.h | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/sys/arch/amd64/include/segments.h b/sys/arch/amd64/include/segments.h index 79f36ed301f..87650c8388a 100644 --- a/sys/arch/amd64/include/segments.h +++ b/sys/arch/amd64/include/segments.h @@ -1,4 +1,4 @@ -/* $OpenBSD: segments.h,v 1.7 2010/10/26 05:49:10 guenther Exp $ */ +/* $OpenBSD: segments.h,v 1.8 2010/11/13 04:16:42 guenther Exp $ */ /* $NetBSD: segments.h,v 1.1 2003/04/26 18:39:47 fvdl Exp $ */ /*- @@ -61,16 +61,14 @@ #define ISLDT(s) ((s) & SEL_LDT) /* is it local or global */ #define SEL_LDT 4 /* local descriptor table */ -/* Dynamically allocated TSSs start (byte offset) */ #define SYSSEL_START (NGDT_MEM << 3) -#define DYNSEL_START (SYSSEL_START + (NGDT_SYS << 4)) +#define GDT_SIZE (SYSSEL_START + (NGDT_SYS << 4)) /* * These define the index not from the start of the GDT, but from * the part of the GDT that they're allocated from. * First NGDT_MEM entries are 8-byte descriptors for CS and DS. - * - * The rest is 16-byte descriptors for TSSs + * Next NGDT_SYS entries are 16-byte descriptors defining TSSs. */ #define IDXSEL(s) (((s) >> 3) & 0x1fff) @@ -249,7 +247,7 @@ void cpu_init_idt(void); * The code and data descriptors must come first. There * are NGDT_MEM of them. * - * Then come the predefined LDT (and possibly TSS) descriptors. + * Then comes the predefined TSS descriptor. * There are NGDT_SYS of them. * * The particular order of the UCODE32, UDATA, and UCODE descriptors is @@ -263,7 +261,8 @@ void cpu_init_idt(void); #define GUCODE_SEL 5 /* User code descriptor */ #define NGDT_MEM 6 -#define NGDT_SYS 0 +#define GPROC0_SEL 0 /* common TSS */ +#define NGDT_SYS 1 #define GDT_SYS_OFFSET (NGDT_MEM << 3) |