| // Copyright 2016 The Fuchsia Authors |
| // Copyright (c) 2009 Corey Tabaka |
| // Copyright (c) 2015 Intel Corporation |
| // Copyright (c) 2016 Travis Geiselbrecht |
| // |
| // Use of this source code is governed by a MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT |
| |
| #include <arch/x86/asm.h> |
| #include <arch/x86/descriptor.h> |
| |
| .section .rodata.gdt,"a",%progbits |
| // Intentionlly misalign this by 6 so that the address word holding _temp_gdt |
| // is naturally aligned. This address gets fixed up by apply_fixups (image.S). |
| .balign 8 |
| .skip 6 |
| DATA(_temp_gdtr) |
| .short _temp_gdt_end - _temp_gdt - 1 |
| .quad _temp_gdt |
| END_DATA(_temp_gdtr) |
| |
| .data |
| .align 8 |
| DATA(_temp_gdt) |
| /* null entry */ |
| .int 0 |
| .int 0 |
| |
| /* CODE_SELECTOR */ |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b10011010 /* P(1) DPL(00) S(1) 1 C(0) R(1) A(0) */ |
| .byte 0b11001111 /* G(1) D(1) 0 0 limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| /* CODE_64_SELECTOR */ |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b10011010 /* P(1) DPL(00) S(1) 1 C(0) R(1) A(0) */ |
| .byte 0b10101111 /* G(1) D(0) L(1) AVL(0) limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| /* DATA_SELECTOR */ |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b10010010 /* P(1) DPL(00) S(1) 0 E(0) W(1) A(0) */ |
| .byte 0b11001111 /* G(1) B(1) 0 0 limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| /* disable 32bit ring3 code descriptor on 64bit kernel */ |
| .int 0x0 |
| .int 0x0 |
| |
| /* USER_DATA_SELECTOR */ |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b11110010 /* P(1) DPL(11) S(1) 0 E(0) W(1) A(0) */ |
| .byte 0b11001111 /* G(1) B(1) 0 0 limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| /* USER_CODE_64_SELECTOR */ |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b11111010 /* P(1) DPL(11) S(1) 1 C(0) R(1) A(0) */ |
| .byte 0b10101111 /* G(1) D(0) L(1) AVL(0) limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| .rept SMP_MAX_CPUS |
| /* TSS_SELECTORs */ |
| .short 0 /* limit 15:00 */ |
| .short 0 /* base 15:00 */ |
| .byte 0 /* base 23:16 */ |
| .byte 0b10001001 /* P(1) DPL(00) 0 10 B(0) 1 */ |
| .byte 0b10000000 /* G(1) 0 0 AVL(0) limit 19:16 */ |
| .byte 0 /* base 31:24 */ |
| /* second half of 64bit desciptor */ |
| .int 0x00000000 /* base 63:32 */ |
| .int 0x00000000 /* reserved/sbz */ |
| .endr |
| |
| END_DATA(_temp_gdt) |
| |
| DATA(_temp_gdt_end) |
