X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/378393581903b274cb7a4d18e0d978071a6b592d..HEAD:/osfmk/i386/seg.h?ds=inline diff --git a/osfmk/i386/seg.h b/osfmk/i386/seg.h index b2b83c246..eed66408b 100644 --- a/osfmk/i386/seg.h +++ b/osfmk/i386/seg.h @@ -1,60 +1,64 @@ /* - * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2012 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. - * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * @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 + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * 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, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. - * - * @APPLE_LICENSE_HEADER_END@ + * 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@ */ -/* +/* * 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. */ -/* - */ - -#ifndef _I386_SEG_H_ -#define _I386_SEG_H_ - -#include +#ifndef _I386_SEG_H_ +#define _I386_SEG_H_ +#ifndef __ASSEMBLER__ #include +#include +#include #include /* @@ -62,53 +66,43 @@ */ static inline uint16_t -sel_to_selector(sel_t sel) +sel_to_selector(sel_t sel) { - union { - sel_t sel; - uint16_t selector; - } tconv; - - tconv.sel = sel; - - return (tconv.selector); + union { + sel_t sel; + uint16_t selector; + } tconv; + + tconv.sel = sel; + + return tconv.selector; } static inline sel_t selector_to_sel(uint16_t selector) { - union { - uint16_t selector; - sel_t sel; - } tconv; - - tconv.selector = selector; - - return (tconv.sel); + union { + uint16_t selector; + sel_t sel; + } tconv; + + tconv.selector = selector; + + return tconv.sel; } -#define LDTSZ 15 /* size of the kernel ldt in entries*/ +#define LDTSZ_MAX 8192 /* maximal size of the kernel ldt in entries */ +#define LDTSZ_DFL (128) +#define LDTSZ (LDTSZ_MAX) +#define LDTSZ_MIN SEL_TO_INDEX(USER_SETTABLE) +/* kernel ldt entries */ -#if MACH_KDB -#ifdef MACH_BSD -#define GDTSZ 14 -#else -#define GDTSZ 11 -#endif -#else /* MACH_KDB */ -#ifdef MACH_BSD -#define GDTSZ 13 -#else -#define GDTSZ 10 -#endif -#endif /* MACH_KDB */ +#define GDTSZ 19 /* * Interrupt table is always 256 entries long. */ -#define IDTSZ 256 - -#ifndef __ASSEMBLER__ +#define IDTSZ 256 #include @@ -116,148 +110,192 @@ selector_to_sel(uint16_t selector) * Real segment descriptor. */ struct real_descriptor { - unsigned int limit_low:16, /* limit 0..15 */ - base_low:16, /* base 0..15 */ - base_med:8, /* base 16..23 */ - access:8, /* access byte */ - limit_high:4, /* limit 16..19 */ - granularity:4, /* granularity */ - base_high:8; /* base 24..31 */ + uint32_t limit_low:16, /* limit 0..15 */ + base_low:16, /* base 0..15 */ + base_med:8, /* base 16..23 */ + access:8, /* access byte */ + limit_high:4, /* limit 16..19 */ + granularity:4, /* granularity */ + base_high:8; /* base 24..31 */ +}; +struct real_descriptor64 { + uint32_t limit_low16:16, /* limit 0..15 */ + base_low16:16, /* base 0..15 */ + base_med8:8, /* base 16..23 */ + access8:8, /* access byte */ + limit_high4:4, /* limit 16..19 */ + granularity4:4, /* granularity */ + base_high8:8, /* base 24..31 */ + base_top32:32, /* base 32..63 */ + reserved32:32; /* reserved/zero */ }; - struct real_gate { - unsigned int offset_low:16, /* offset 0..15 */ - selector:16, - word_count:8, - access:8, - offset_high:16; /* offset 16..31 */ + uint32_t offset_low:16, /* offset 0..15 */ + selector:16, + word_count:8, + access:8, + offset_high:16; /* offset 16..31 */ +}; +struct real_gate64 { + uint32_t offset_low16:16, /* offset 0..15 */ + selector16:16, + IST:3, + zeroes5:5, + access8:8, + offset_high16:16, /* offset 16..31 */ + offset_top32:32, /* offset 32..63 */ + reserved32:32; /* reserved/zero */ }; +#define MAKE_REAL_DESCRIPTOR(base, lim, gran, acc) {\ + .limit_low = lim & 0xffff, \ + .limit_high = (lim >> 16) & 0xf, \ + .base_low = base & 0xffff, \ + .base_med = (base >> 16) & 0xff, \ + .base_high = (base >> 24) & 0xff, \ + .access = acc, \ + .granularity = gran \ +} + /* * We build descriptors and gates in a 'fake' format to let the * fields be contiguous. We shuffle them into the real format * at runtime. */ struct fake_descriptor { - unsigned int offset:32; /* offset */ - unsigned int lim_or_seg:20; /* limit */ - /* or segment, for gate */ - unsigned int size_or_wdct:4; /* size/granularity */ - /* word count, for gate */ - unsigned int access:8; /* access */ + uint32_t offset:32; /* offset */ + uint32_t lim_or_seg:20; /* limit */ + /* or segment, for gate */ + uint32_t size_or_wdct:4; /* size/granularity */ + /* word count, for gate */ + uint32_t access:8; /* access */ +}; +struct fake_descriptor64 { + uint64_t offset64; /* offset [0..31,32..63] */ + uint32_t lim_or_seg:20; /* limit */ + /* or segment, for gate */ + uint32_t size_or_IST:4; /* size/granularity */ + /* IST for gates */ + uint32_t access:8; /* access */ + uint32_t reserved:32; /* reserved/zero */ }; +typedef struct __attribute__((packed)) { + uint16_t size; + void *ptr; +} x86_64_desc_register_t; + + + /* * Boot-time data for master (or only) CPU */ -extern struct fake_descriptor idt[IDTSZ]; -extern struct fake_descriptor gdt[GDTSZ]; -extern struct fake_descriptor ldt[LDTSZ]; -extern struct i386_tss ktss; +extern struct real_descriptor master_gdt[GDTSZ]; +extern struct real_descriptor master_ldt[]; +extern struct i386_tss master_ktss; +extern struct sysenter_stack master_sstk; + +extern struct fake_descriptor64 master_idt64[IDTSZ]; +extern struct x86_64_tss master_ktss64; __BEGIN_DECLS -#if MACH_KDB -extern char db_stack_store[]; -extern char db_task_stack_store[]; -extern struct i386_tss dbtss; -extern void db_task_start(void); -#endif /* MACH_KDB */ +extern char df_task_stack[]; +extern char df_task_stack_end[]; +extern struct i386_tss master_dftss; +extern void df_task_start(void); + +extern char mc_task_stack[]; +extern char mc_task_stack_end[]; +extern struct i386_tss master_mctss; +extern void mc_task_start(void); __END_DECLS -#endif /*__ASSEMBLER__*/ +#endif /*__ASSEMBLER__*/ -#define SZ_32 0x4 /* 32-bit segment */ -#define SZ_G 0x8 /* 4K limit field */ +#define SZ_64 0x2 /* 64-bit segment */ +#define SZ_32 0x4 /* 32-bit segment */ +#define SZ_G 0x8 /* 4K limit field */ -#define ACC_A 0x01 /* accessed */ -#define ACC_TYPE 0x1e /* type field: */ +#define ACC_A 0x01 /* accessed */ +#define ACC_TYPE 0x1e /* type field: */ -#define ACC_TYPE_SYSTEM 0x00 /* system descriptors: */ +#define ACC_TYPE_SYSTEM 0x00 /* system descriptors: */ -#define ACC_LDT 0x02 /* LDT */ -#define ACC_CALL_GATE_16 0x04 /* 16-bit call gate */ -#define ACC_TASK_GATE 0x05 /* task gate */ -#define ACC_TSS 0x09 /* task segment */ -#define ACC_CALL_GATE 0x0c /* call gate */ -#define ACC_INTR_GATE 0x0e /* interrupt gate */ -#define ACC_TRAP_GATE 0x0f /* trap gate */ +#define ACC_LDT 0x02 /* LDT */ +#define ACC_CALL_GATE_16 0x04 /* 16-bit call gate */ +#define ACC_TASK_GATE 0x05 /* task gate */ +#define ACC_TSS 0x09 /* task segment */ +#define ACC_CALL_GATE 0x0c /* call gate */ +#define ACC_INTR_GATE 0x0e /* interrupt gate */ +#define ACC_TRAP_GATE 0x0f /* trap gate */ -#define ACC_TSS_BUSY 0x02 /* task busy */ +#define ACC_TSS_BUSY 0x02 /* task busy */ -#define ACC_TYPE_USER 0x10 /* user descriptors */ +#define ACC_TYPE_USER 0x10 /* user descriptors */ -#define ACC_DATA 0x10 /* data */ -#define ACC_DATA_W 0x12 /* data, writable */ -#define ACC_DATA_E 0x14 /* data, expand-down */ -#define ACC_DATA_EW 0x16 /* data, expand-down, - writable */ -#define ACC_CODE 0x18 /* code */ -#define ACC_CODE_R 0x1a /* code, readable */ -#define ACC_CODE_C 0x1c /* code, conforming */ -#define ACC_CODE_CR 0x1e /* code, conforming, - readable */ -#define ACC_PL 0x60 /* access rights: */ -#define ACC_PL_K 0x00 /* kernel access only */ -#define ACC_PL_U 0x60 /* user access */ -#define ACC_P 0x80 /* segment present */ +#define ACC_DATA 0x10 /* data */ +#define ACC_DATA_W 0x12 /* data, writable */ +#define ACC_DATA_E 0x14 /* data, expand-down */ +#define ACC_DATA_EW 0x16 /* data, expand-down, + * writable */ +#define ACC_CODE 0x18 /* code */ +#define ACC_CODE_R 0x1a /* code, readable */ +#define ACC_CODE_C 0x1c /* code, conforming */ +#define ACC_CODE_CR 0x1e /* code, conforming, + * readable */ +#define ACC_PL 0x60 /* access rights: */ +#define ACC_PL_K 0x00 /* kernel access only */ +#define ACC_PL_U 0x60 /* user access */ +#define ACC_P 0x80 /* segment present */ /* * Components of a selector */ -#define SEL_LDTS 0x04 /* local selector */ -#define SEL_PL 0x03 /* privilege level: */ -#define SEL_PL_K 0x00 /* kernel selector */ -#define SEL_PL_U 0x03 /* user selector */ +#define SEL_LDTS 0x04 /* local selector */ +#define SEL_PL 0x03 /* privilege level: */ +#define SEL_PL_K 0x00 /* kernel selector */ +#define SEL_PL_U 0x03 /* user selector */ /* * Convert selector to descriptor table index. */ -#define sel_idx(sel) (selector_to_sel(sel).index) +#define sel_idx(sel) (selector_to_sel(sel).index) +#define SEL_TO_INDEX(s) ((s)>>3) + +#define NULL_SEG 0 -#define NULL_SEG 0 /* - * User descriptors for MACH - 32-bit flat address space + * Kernel descriptors for MACH - 64-bit flat address space. */ -#define USER_SCALL 0x07 /* system call gate */ -#define USER_RPC 0x0f /* mach rpc call gate */ -#define USER_CS 0x17 /* user code segment */ -#define USER_DS 0x1f /* user data segment */ -#define USER_CTHREAD 0x27 /* user cthread area */ -#define USER_SETTABLE 0x2f /* start of user settable ldt entries */ -#define USLDTSZ 10 /* number of user settable entries */ - +#define KERNEL64_CS 0x08 /* 1: K64 code */ +#define SYSENTER_CS 0x0b /* U32 sysenter pseudo-segment */ +#define KERNEL64_SS 0x10 /* 2: KERNEL64_CS+8 for syscall */ +#define USER_CS 0x1b /* 3: U32 code */ +#define USER_DS 0x23 /* 4: USER_CS+8 for sysret */ +#define USER64_CS 0x2b /* 5: USER_CS+16 for sysret */ +#define USER64_DS USER_DS /* U64 data pseudo-segment */ +#define KERNEL_LDT 0x30 /* 6: */ + /* 7: other 8 bytes of KERNEL_LDT */ +#define KERNEL_TSS 0x40 /* 8: */ + /* 9: other 8 bytes of KERNEL_TSS */ +#define KERNEL32_CS 0x50 /* 10: */ +#define USER_LDT 0x58 /* 11: */ + /* 12: other 8 bytes of USER_LDT */ +#define KERNEL_DS 0x68 /* 13: 32-bit kernel data */ + + +#define SYSENTER_TF_CS (USER_CS|0x10000) +#define SYSENTER_DS KERNEL64_SS /* sysenter kernel data segment */ + +#endif /* _I386_SEG_H_ */ +#ifdef __x86_64__ /* - * Kernel descriptors for MACH - 32-bit flat address space. + * 64-bit kernel LDT descriptors */ -#define KERNEL_CS 0x08 /* kernel code */ -#define KERNEL_DS 0x10 /* kernel data */ -#define KERNEL_LDT 0x18 /* master LDT */ -#define KERNEL_TSS 0x20 /* master TSS (uniprocessor) */ -#ifdef MACH_BSD -#define BSD_SCALL_SEL 0x28 /* BSD System calls */ -#define MK25_SCALL_SEL 0x30 /* MK25 System Calls */ -#define MACHDEP_SCALL_SEL 0x38 /* Machdep SYstem calls */ -#else -#define USER_LDT 0x28 /* place for per-thread LDT */ -#define USER_TSS 0x30 /* place for per-thread TSS - that holds IO bitmap */ -#define FPE_CS 0x38 /* floating-point emulator code */ +#define SYSCALL_CS 0x07 /* syscall pseudo-segment */ +#define USER_CTHREAD 0x0f /* user cthread area */ +#define USER_SETTABLE 0x1f /* start of user settable ldt entries */ #endif -#define USER_FPREGS 0x40 /* user-mode access to saved - floating-point registers */ -#define CPU_DATA_GS 0x48 /* per-cpu data */ - -#ifdef MACH_BSD -#define USER_LDT 0x58 -#define USER_TSS 0x60 -#define FPE_CS 0x68 -#endif - -#if MACH_KDB -#define DEBUG_TSS 0x50 /* debug TSS (uniprocessor) */ -#endif - -#endif /* _I386_SEG_H_ */