X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/21362eb3e66fd2c787aee132bce100a44d71a99c..cb3231590a3c94ab4375e2228bd5e86b0cf1ad7e:/osfmk/i386/gdt.c diff --git a/osfmk/i386/gdt.c b/osfmk/i386/gdt.c index 44f6a3c2f..c774093a1 100644 --- a/osfmk/i386/gdt.c +++ b/osfmk/i386/gdt.c @@ -1,8 +1,8 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2013 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ - * + * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in @@ -11,10 +11,10 @@ * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. - * + * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. - * + * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, @@ -22,35 +22,35 @@ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. - * + * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* CMU_ENDHIST */ -/* +/* * Mach Operating System * Copyright (c) 1991,1990 Carnegie Mellon University * All Rights Reserved. - * + * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. - * + * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * + * * Carnegie Mellon requests users of this software to return to - * + * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 - * + * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ @@ -60,71 +60,51 @@ /* * Global descriptor table. */ -#include -#include -#include -#include -#include - -#ifdef MACH_BSD -extern int trap_unix_syscall(void), trap_mach25_syscall(void), - trap_machdep_syscall(void), syscall(void); -#endif +#include -struct fake_descriptor gdt[GDTSZ] = { -/* 0x000 */ { 0, 0, 0, 0 }, /* always NULL */ -/* 0x008 */ { 0, - 0xfffff, - SZ_32|SZ_G, - ACC_P|ACC_PL_K|ACC_CODE_R - }, /* kernel code */ -/* 0x010 */ { 0, - 0xfffff, - SZ_32|SZ_G, - ACC_P|ACC_PL_K|ACC_DATA_W - }, /* kernel data */ -/* 0x018 */ { (unsigned int)ldt, - LDTSZ*sizeof(struct fake_descriptor)-1, - 0, - ACC_P|ACC_PL_K|ACC_LDT - }, /* local descriptor table */ -/* 0x020 */ { (unsigned int)&ktss, - sizeof(struct i386_tss)-1, - 0, - ACC_P|ACC_PL_K|ACC_TSS - }, /* TSS for this processor */ -#ifdef MACH_BSD -/* 0x28 */ { (unsigned int) &trap_unix_syscall, - KERNEL_CS, - 0, /* no parameters */ - ACC_P|ACC_PL_U|ACC_CALL_GATE - }, -/* 0x30 */ { (unsigned int) &trap_mach25_syscall, - KERNEL_CS, - 0, /* no parameters */ - ACC_P|ACC_PL_U|ACC_CALL_GATE - }, -/* 0x38 */ { (unsigned int) &trap_machdep_syscall, - KERNEL_CS, - 0, /* no parameters */ - ACC_P|ACC_PL_U|ACC_CALL_GATE - }, -#else -/* 0x028 */ { 0, 0, 0, 0 }, /* per-thread LDT */ -/* 0x030 */ { 0, 0, 0, 0 }, /* per-thread TSS for IO bitmap */ -/* 0x038 */ { 0, 0, 0, 0 }, -#endif -/* 0x040 */ { 0, 0, 0, 0 }, -/* 0x048 */ { (unsigned int)&cpu_data_master, - sizeof(cpu_data_t)-1, - SZ_32, - ACC_P|ACC_PL_K|ACC_DATA_W - }, /* per-CPU current thread address */ -#if MACH_KDB -/* 0x050 */ { (unsigned int)&dbtss, - sizeof(struct i386_tss)-1, - 0, - ACC_P|ACC_PL_K|ACC_TSS - } /* TSS for this processor */ -#endif /* MACH_KDB */ +struct real_descriptor master_gdt[GDTSZ] +__attribute__((section("__HIB,__desc"))) +__attribute__((aligned(PAGE_SIZE))) = { + [SEL_TO_INDEX(KERNEL32_CS)] = MAKE_REAL_DESCRIPTOR( /* kernel 32-bit code */ + 0, + 0xfffff, + SZ_32 | SZ_G, + ACC_P | ACC_PL_K | ACC_CODE_R + ), + [SEL_TO_INDEX(KERNEL_DS)] = MAKE_REAL_DESCRIPTOR( /* kernel data */ + 0, + 0xfffff, + SZ_32 | SZ_G, + ACC_P | ACC_PL_K | ACC_DATA_W + ), + [SEL_TO_INDEX(KERNEL64_CS)] = MAKE_REAL_DESCRIPTOR( /* kernel 64-bit code */ + 0, + 0xfffff, + SZ_64 | SZ_G, + ACC_P | ACC_PL_K | ACC_CODE_R + ), + [SEL_TO_INDEX(KERNEL64_SS)] = MAKE_REAL_DESCRIPTOR( /* kernel 64-bit syscall stack */ + 0, + 0xfffff, + SZ_32 | SZ_G, + ACC_P | ACC_PL_K | ACC_DATA_W + ), + [SEL_TO_INDEX(USER_CS)] = MAKE_REAL_DESCRIPTOR( /* 32-bit user code segment */ + 0, + 0xfffff, + SZ_32 | SZ_G, + ACC_P | ACC_PL_U | ACC_CODE_R + ), + [SEL_TO_INDEX(USER_DS)] = MAKE_REAL_DESCRIPTOR( /* 32-bit user data segment */ + 0, + 0xfffff, + SZ_32 | SZ_G, + ACC_P | ACC_PL_U | ACC_DATA_W + ), + [SEL_TO_INDEX(USER64_CS)] = MAKE_REAL_DESCRIPTOR( /* user 64-bit code segment */ + 0, + 0xfffff, + SZ_64 | SZ_G, + ACC_P | ACC_PL_U | ACC_CODE_R + ), };