X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/43866e378188c25dd1e2208016ab3cbeb086ae6c..c0fea4742e91338fffdcf79f86a7c1d5e2b97eb1:/osfmk/i386/thread.h diff --git a/osfmk/i386/thread.h b/osfmk/i386/thread.h index 99bcca4a0..d23a9d087 100644 --- a/osfmk/i386/thread.h +++ b/osfmk/i386/thread.h @@ -1,24 +1,21 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * - * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. + * 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. 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 + * This 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. - * Please see the License for the specific language governing rights and - * limitations under the License. + * 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@ */ @@ -66,6 +63,7 @@ #include #include #include +#include #include @@ -73,7 +71,120 @@ #include #include #include -#include + +/* + * i386_saved_state: + * + * Has been exported to servers. See: mach/i386/thread_status.h + * + * This structure corresponds to the state of user registers + * as saved upon kernel entry. It lives in the pcb. + * It is also pushed onto the stack for exceptions in the kernel. + * For performance, it is also used directly in syscall exceptions + * if the server has requested i386_THREAD_STATE flavor for the exception + * port. + */ + +/* + * Save area for user floating-point state. + * Allocated only when necessary. + */ + +struct x86_fpsave_state { + boolean_t fp_valid; + enum { + FXSAVE32 = 1, + FXSAVE64 = 2 + } fp_save_layout; + struct x86_fx_save fx_save_state __attribute__ ((aligned (16))); +}; + + +/* + * x86_kernel_state32: + * + * This structure corresponds to the state of kernel registers + * as saved in a context-switch. It lives at the base of the stack. + * kernel only runs in 32 bit mode for now + */ + +struct x86_kernel_state32 { + int k_ebx; /* kernel context */ + int k_esp; + int k_ebp; + int k_edi; + int k_esi; + int k_eip; + /* + * Kernel stacks are 16-byte aligned with a 4-byte i386_exception_link at + * the top, followed by an x86_kernel_state32. After both structs have + * been pushed, we want to be 16-byte aligned. A dummy int gets us there. + */ + int dummy; +}; + + +typedef struct pcb { + void *sf; + x86_saved_state_t *iss; + struct x86_fpsave_state *ifps; +#ifdef MACH_BSD + uint64_t cthread_self; /* for use of cthread package */ + struct real_descriptor cthread_desc; + unsigned long uldt_selector; /* user ldt selector to set */ + struct real_descriptor uldt_desc; /* the actual user setable ldt data */ +#endif + decl_simple_lock_data(,lock); + uint64_t iss_pte0; + uint64_t iss_pte1; + void *ids; +} *pcb_t; + + +/* + * Maps state flavor to number of words in the state: + */ +__private_extern__ unsigned int _MachineStateCount[]; + +#define USER_STATE(ThrAct) ((ThrAct)->machine.pcb->iss) +#define USER_REGS32(ThrAct) (saved_state32(USER_STATE(ThrAct))) +#define USER_REGS64(ThrAct) (saved_state64(USER_STATE(ThrAct))) + +#define user_pc(ThrAct) (is_saved_state32(USER_STATE(ThrAct)) ? \ + USER_REGS32(ThrAct)->eip : \ + USER_REGS64(ThrAct)->isf.rip ) + + +struct machine_thread { + /* + * pointer to process control block + * (actual storage may as well be here, too) + */ + struct pcb xxx_pcb; + pcb_t pcb; + + uint32_t specFlags; +#define OnProc 0x1 + + struct { + user_addr_t user_base; + } copy_window[NCOPY_WINDOWS]; + int nxt_window; + int copyio_state; +#define WINDOWS_DIRTY 0 +#define WINDOWS_CLEAN 1 +#define WINDOWS_CLOSED 2 +#define WINDOWS_OPENED 3 + uint64_t physwindow_pte; + int physwindow_busy; +}; + + +extern void *get_user_regs(thread_t); + +extern void *act_thread_csave(void); +extern void act_thread_catt(void *ctx); +extern void act_thread_cfree(void *ctx); /* * i386_exception_link: @@ -82,7 +193,7 @@ * It points to the current thread`s user registers. */ struct i386_exception_link { - struct i386_saved_state *saved_state; + x86_saved_state_t *saved_state; }; @@ -95,38 +206,10 @@ struct i386_exception_link { */ #define STACK_IKS(stack) \ - ((struct i386_kernel_state *)((stack) + KERNEL_STACK_SIZE) - 1) + ((struct x86_kernel_state32 *)((stack) + KERNEL_STACK_SIZE) - 1) #define STACK_IEL(stack) \ ((struct i386_exception_link *)STACK_IKS(stack) - 1) -#if NCPUS > 1 -#include -#endif - -/* - * 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; -#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 */ -#if NCPUS > 1 -#define curr_gdt(mycpu) (mp_gdt[mycpu]) -#define curr_ktss(mycpu) (mp_ktss[mycpu]) -#else -#define curr_gdt(mycpu) (gdt) -#define curr_ktss(mycpu) (&ktss) -#endif - -#define gdt_desc_p(mycpu,sel) \ - ((struct real_descriptor *)&curr_gdt(mycpu)[sel_idx(sel)]) - /* * Return address of the function that called current function, given * address of the first parameter of current function. @@ -140,18 +223,4 @@ extern void db_task_start(void); */ #define MACHINE_FAST_EXCEPTION 1 -/* - * MD Macro to fill up global stack state, - * keeping the MD structure sizes + games private - */ -#define MACHINE_STACK_STASH(stack) \ -MACRO_BEGIN \ - mp_disable_preemption(); \ - kernel_stack[cpu_number()] = (stack) + \ - (KERNEL_STACK_SIZE - sizeof (struct i386_exception_link) \ - - sizeof (struct i386_kernel_state)), \ - active_stacks[cpu_number()] = (stack); \ - mp_enable_preemption(); \ -MACRO_END - #endif /* _I386_THREAD_H_ */