X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/316670eb35587141e969394ae8537d66b9211e80..HEAD:/osfmk/i386/seg.h diff --git a/osfmk/i386/seg.h b/osfmk/i386/seg.h index 94af4521f..eed66408b 100644 --- a/osfmk/i386/seg.h +++ b/osfmk/i386/seg.h @@ -1,8 +1,8 @@ /* - * Copyright (c) 2000-2009 Apple Inc. All rights reserved. + * Copyright (c) 2000-2012 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, @@ -22,42 +22,43 @@ * 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_ +#ifndef _I386_SEG_H_ +#define _I386_SEG_H_ #ifndef __ASSEMBLER__ #include #include +#include #include /* @@ -65,41 +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 8192 /* size of the kernel ldt in entries */ -#define LDTSZ_MIN SEL_TO_INDEX(USER_SETTABLE) - /* kernel ldt 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 */ -#define GDTSZ 19 +#define GDTSZ 19 /* * Interrupt table is always 256 entries long. */ -#define IDTSZ 256 +#define IDTSZ 256 #include @@ -107,44 +110,44 @@ selector_to_sel(uint16_t selector) * Real segment descriptor. */ struct real_descriptor { - 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 */ + 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 */ + 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 { - uint32_t 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 */ + 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) { \ +#define MAKE_REAL_DESCRIPTOR(base, lim, gran, acc) {\ .limit_low = lim & 0xffff, \ .limit_high = (lim >> 16) & 0xf, \ .base_low = base & 0xffff, \ @@ -160,189 +163,139 @@ struct real_gate64 { * at runtime. */ struct fake_descriptor { - 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 */ + 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 */ + 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 */ }; -#ifdef __i386__ -#define FAKE_UBER64(addr32) { (uint32_t) (addr32), KERNEL_UBER_BASE_HI32 } -#define FAKE_COMPAT(addr32) { (uint32_t) (addr32), 0x0 } -#define UBER64(addr32) ((addr64_t) (uintptr_t)addr32 + KERNEL_UBER_BASE) -#endif + +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 master_idt[IDTSZ]; -extern struct real_descriptor master_gdt[GDTSZ]; -extern struct real_descriptor master_ldt[LDTSZ]; -extern struct i386_tss master_ktss; -extern struct sysenter_stack master_sstk; +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; +extern struct fake_descriptor64 master_idt64[IDTSZ]; +extern struct x86_64_tss master_ktss64; __BEGIN_DECLS -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 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); +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_64 0x2 /* 64-bit segment */ -#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_TO_INDEX(s) ((s)>>3) +#define sel_idx(sel) (selector_to_sel(sel).index) +#define SEL_TO_INDEX(s) ((s)>>3) -#define NULL_SEG 0 +#define NULL_SEG 0 -#ifdef __i386__ -/* - * User descriptors for MACH - 32-bit flat address space - */ -#define SYSENTER_CS 0x07 /* sysenter kernel code segment */ -#define SYSENTER_DS 0x0f /* sysenter kernel data segment */ -#define USER_CS 0x17 /* user code segment - Must be SYSENTER_CS+16 for sysexit */ -/* Special case: sysenter with EFL_TF (trace bit) set - use iret not sysexit */ -#define SYSENTER_TF_CS (USER_CS|0x10000) -#define USER_DS 0x1f /* user data segment - Must be SYSENTER_CS+24 for sysexit */ -#define USER64_CS 0x27 /* 64-bit user code segment - Must be USER_CS+16 for sysret */ -#define USER64_DS USER_DS /* 64-bit user data segment == 32-bit */ -#define SYSCALL_CS 0x2f /* 64-bit syscall pseudo-segment */ -#define USER_CTHREAD 0x37 /* user cthread area */ -#define USER_SETTABLE 0x3f /* start of user settable ldt entries */ - -/* - * Kernel descriptors for MACH - 32-bit flat address space. - */ -#define KERNEL32_CS 0x08 /* kernel code */ -#define KERNEL_DS 0x10 /* kernel data */ -#define KERNEL_LDT 0x18 /* master LDT */ -#define KERNEL_LDT_2 0x20 /* master LDT expanded for 64-bit */ -#define KERNEL_TSS 0x28 /* master TSS */ -#define KERNEL_TSS_2 0x30 /* master TSS expanded for 64-bit */ - -#define MC_TSS 0x38 /* machine-check handler TSS */ - -#define CPU_DATA_GS 0x48 /* per-cpu data */ - -#define DF_TSS 0x50 /* double-fault handler TSS */ - -#define USER_LDT 0x58 -#define USER_TSS 0x60 -#define FPE_CS 0x68 - -#else // __x86_64__ /* * Kernel descriptors for MACH - 64-bit flat address space. */ -#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 */ - -#endif - -#ifdef __i386__ -#if !defined(USER_WINDOW_SEL) -#define USER_WINDOW_SEL 0x70 /* 14: window for copyin/copyout */ -#define PHYS_WINDOW_SEL 0x78 /* 15: window for copyin/copyout */ -#endif -#define KERNEL64_CS 0x80 /* 16: kernel 64-bit code */ -#define KERNEL64_SS 0x88 /* 17: kernel 64-bit (syscall) stack */ -#else // __x86_64__ -#define SYSENTER_TF_CS (USER_CS|0x10000) -#define SYSENTER_DS KERNEL64_SS /* sysenter kernel data segment */ -#endif - +#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__ /* * 64-bit kernel LDT descriptors */ -#define SYSCALL_CS 0x07 /* syscall pseudo-segment */ -#define USER_CTHREAD 0x0f /* user cthread area */ -#define USER_SETTABLE 0x1f /* start of user settable ldt entries */ +#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 - -#endif /* _I386_SEG_H_ */