X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/1c79356b52d46aa6b508fb032f5ae709b1f2897b..c0fea4742e91338fffdcf79f86a7c1d5e2b97eb1:/osfmk/i386/seg.h diff --git a/osfmk/i386/seg.h b/osfmk/i386/seg.h index 21c63306a..eca69d6f3 100644 --- a/osfmk/i386/seg.h +++ b/osfmk/i386/seg.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * @@ -52,18 +52,65 @@ #ifndef _I386_SEG_H_ #define _I386_SEG_H_ + #include +#include +#include +#include /* * i386 segmentation. */ +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 17 /* kernel ldt entries used by the system */ + +#if MACH_KDB +#define GDTSZ 19 +#else +#define GDTSZ 18 +#endif + +/* + * Interrupt table is always 256 entries long. + */ +#define IDTSZ 256 + #ifndef __ASSEMBLER__ + +#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 +118,34 @@ 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 */ +}; /* * We build descriptors and gates in a 'fake' format to let the @@ -86,15 +153,64 @@ 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 { + uint32_t offset[2]; /* 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 */ }; +#define FAKE_UBER64(addr32) { (uint32_t) (addr32), KERNEL_UBER_BASE_HI32 } +#define FAKE_COMPAT(addr32) { (uint32_t) (addr32), 0x0 } +#define UBER64(addr32) ((addr64_t) addr32 + KERNEL_UBER_BASE) + +/* + * Boot-time data for master (or only) CPU + */ +extern struct fake_descriptor master_idt[IDTSZ]; +extern struct fake_descriptor master_gdt[GDTSZ]; +extern struct fake_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 fake_descriptor64 kernel_ldt_desc64; +extern struct fake_descriptor64 kernel_tss_desc64; +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); + +#if MACH_KDB +extern char db_stack_store[]; +extern char db_task_stack_store[]; +extern struct i386_tss master_dbtss; +extern void db_task_start(void); +#endif /* MACH_KDB */ + +__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 */ @@ -141,17 +257,29 @@ 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) + +#define NULL_SEG 0 /* * 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 LDTSZ 4 +#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 */ +#define USLDTSZ 10 /* number of user settable entries */ /* * Kernel descriptors for MACH - 32-bit flat address space. @@ -159,47 +287,41 @@ struct fake_descriptor { #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 */ +#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 */ -#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) */ +#define USER_WINDOW_SEL 0x70 /* window for copyin/copyout */ +#define PHYS_WINDOW_SEL 0x78 /* window for copyin/copyout */ -#ifdef MACH_BSD -#define GDTSZ 14 -#else -#define GDTSZ 11 -#endif -#else +#define KERNEL64_CS 0x80 /* kernel 64-bit code */ +#define KERNEL64_SS 0x88 /* kernel 64-bit (syscall) stack */ -#ifdef MACH_BSD -#define GDTSZ 13 -#else -#define GDTSZ 10 -#endif +#if MACH_KDB +#define DEBUG_TSS 0x90 /* debug TSS (uniprocessor) */ #endif -/* - * Interrupt table is always 256 entries long. - */ -#define IDTSZ 256 +struct __gdt_desc_struct { + unsigned short size; + unsigned long address __attribute__((packed)); + unsigned short pad; +} __attribute__ ((packed)); + +struct __idt_desc_struct { + unsigned short size; + unsigned long address __attribute__((packed)); + unsigned short pad; +} __attribute__ ((packed)); + #endif /* _I386_SEG_H_ */