diff options
Diffstat (limited to 'i386/i386/gdt.c')
| -rw-r--r-- | i386/i386/gdt.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/i386/i386/gdt.c b/i386/i386/gdt.c index bc36031b..fb18360e 100644 --- a/i386/i386/gdt.c +++ b/i386/i386/gdt.c @@ -33,6 +33,7 @@ #include <mach/machine/vm_types.h> #include <mach/xen.h> +#include <kern/assert.h> #include <intel/pmap.h> #include "vm_param.h" @@ -49,6 +50,14 @@ void gdt_init(void) { /* Initialize the kernel code and data segment descriptors. */ +#ifdef __x86_64__ + assert(LINEAR_MIN_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS == 0); + fill_gdt_descriptor(KERNEL_CS, 0, 0, ACC_PL_K|ACC_CODE_R, SZ_64); + fill_gdt_descriptor(KERNEL_DS, 0, 0, ACC_PL_K|ACC_DATA_W, SZ_64); +#ifndef MACH_PV_DESCRIPTORS + fill_gdt_descriptor(LINEAR_DS, 0, 0, ACC_PL_K|ACC_DATA_W, SZ_64); +#endif /* MACH_PV_DESCRIPTORS */ +#else fill_gdt_descriptor(KERNEL_CS, LINEAR_MIN_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, LINEAR_MAX_KERNEL_ADDRESS - (LINEAR_MIN_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) - 1, @@ -63,6 +72,7 @@ gdt_init(void) 0xffffffff, ACC_PL_K|ACC_DATA_W, SZ_32); #endif /* MACH_PV_DESCRIPTORS */ +#endif #ifdef MACH_PV_DESCRIPTORS unsigned long frame = kv_to_mfn(gdt); |