X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/de355530ae67247cbd0da700edb3a2a1dae884c2..5ba3f43ea354af8ad55bea84372a2bc834d8757c:/osfmk/i386/seg.h diff --git a/osfmk/i386/seg.h b/osfmk/i386/seg.h index 21c63306a..75f5182e0 100644 --- a/osfmk/i386/seg.h +++ b/osfmk/i386/seg.h @@ -1,23 +1,29 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2012 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_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 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. * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * 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. + * 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_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ @@ -47,23 +53,61 @@ * 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 __ASSEMBLER__ +#include +#include +#include /* * i386 segmentation. */ -#ifndef __ASSEMBLER__ +static inline uint16_t +sel_to_selector(sel_t sel) +{ + 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); +} + +#define LDTSZ 8192 /* size of the kernel ldt in entries */ +#define LDTSZ_MIN SEL_TO_INDEX(USER_SETTABLE) + /* kernel ldt entries */ + +#define GDTSZ 19 + +/* + * Interrupt table is always 256 entries long. + */ +#define IDTSZ 256 + +#include + /* * Real segment descriptor. */ struct real_descriptor { - unsigned int limit_low:16, /* limit 0..15 */ + uint32_t limit_low:16, /* limit 0..15 */ base_low:16, /* base 0..15 */ base_med:8, /* base 16..23 */ access:8, /* access byte */ @@ -71,14 +115,44 @@ struct real_descriptor { 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 */ + 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 @@ -86,15 +160,56 @@ struct real_gate { * at runtime. */ struct fake_descriptor { - unsigned int offset:32; /* offset */ - unsigned int lim_or_seg:20; /* limit */ + uint32_t offset:32; /* offset */ + uint32_t lim_or_seg:20; /* limit */ /* or segment, for gate */ - unsigned int size_or_wdct:4; /* size/granularity */ + uint32_t size_or_wdct:4; /* size/granularity */ /* word count, for gate */ - unsigned int access:8; /* access */ + 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 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 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 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__*/ +#define SZ_64 0x2 /* 64-bit segment */ #define SZ_32 0x4 /* 32-bit segment */ #define SZ_G 0x8 /* 4K limit field */ @@ -141,65 +256,42 @@ struct fake_descriptor { /* * Convert selector to descriptor table index. */ -#define sel_idx(sel) ((sel)>>3) +#define sel_idx(sel) (selector_to_sel(sel).index) +#define SEL_TO_INDEX(s) ((s)>>3) -/* - * User descriptors for MACH - 32-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 NULL_SEG 0 -#define LDTSZ 4 /* - * Kernel descriptors for MACH - 32-bit flat address space. + * Kernel descriptors for MACH - 64-bit flat address space. */ -#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 */ -#endif -#define USER_FPREGS 0x40 /* user-mode access to saved - floating-point registers */ -#define CPU_DATA 0x48 /* per-cpu data */ - -#ifdef MACH_BSD -#define USER_LDT 0x58 -#define USER_TSS 0x60 -#define FPE_CS 0x68 -#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 */ -#if MACH_KDB -#define DEBUG_TSS 0x50 /* debug TSS (uniprocessor) */ - -#ifdef MACH_BSD -#define GDTSZ 14 -#else -#define GDTSZ 11 -#endif -#else -#ifdef MACH_BSD -#define GDTSZ 13 -#else -#define GDTSZ 10 -#endif -#endif +#define SYSENTER_TF_CS (USER_CS|0x10000) +#define SYSENTER_DS KERNEL64_SS /* sysenter kernel data segment */ +#ifdef __x86_64__ /* - * Interrupt table is always 256 entries long. + * 64-bit kernel LDT descriptors */ -#define IDTSZ 256 +#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_ */