diff options
Diffstat (limited to 'arch/i686/lgdt.c')
-rw-r--r-- | arch/i686/lgdt.c | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/arch/i686/lgdt.c b/arch/i686/lgdt.c deleted file mode 100644 index 2be5d30..0000000 --- a/arch/i686/lgdt.c +++ /dev/null @@ -1,35 +0,0 @@ -#include <gdt.h> - -struct __attribute__((packed)) Pointer { - uint16_t limit; - uint32_t base; -}; - -static struct SegmentDescriptor_t segments[8] __attribute__((aligned(32))); - -void -gdt_install() -{ - SegmentDescriptor(&segments[0], 0, 0, 0); // null segment - SegmentDescriptor(&segments[2], 0, 0xffffffff, 0x9a); // ktext - SegmentDescriptor(&segments[3], 0, 0xffffffff, 0x92); // kdata - - const struct Pointer ptr = {.limit = sizeof(segments) - 1, .base = (unsigned)&segments}; - asm volatile("lgdt (%0)" : : "a"(&ptr)); - - // load the kernel data segment - asm volatile(R"(mov %0, %%ds - mov %0, %%es - mov %0, %%fs - mov %0, %%gs - mov %0, %%ss -)" - : - : "ax"(kdataDescriptor)); - - // load the kernel code segment - asm volatile(R"(ljmp %0, $1f - 1:)" - : - : "i"(ktextDescriptor)); -} |