X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/6601e61aa18bf4f09af135ff61fc7f4771d23b06..2a1bd2d3eef5c7a7bb14f4bb9fdbca9a96ee4752:/osfmk/i386/mp_desc.h diff --git a/osfmk/i386/mp_desc.h b/osfmk/i386/mp_desc.h index 3a89fad07..aeca023a5 100644 --- a/osfmk/i386/mp_desc.h +++ b/osfmk/i386/mp_desc.h @@ -1,49 +1,55 @@ /* - * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2009 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. */ @@ -51,10 +57,9 @@ /* */ -#ifndef _I386_MP_DESC_H_ -#define _I386_MP_DESC_H_ +#ifndef _I386_MP_DESC_H_ +#define _I386_MP_DESC_H_ -#include #include __BEGIN_DECLS @@ -74,96 +79,55 @@ __BEGIN_DECLS /* * The descriptor tables are together in a structure * allocated one per processor (except for the boot processor). - * Note that dbtss could be conditionalized on MACH_KDB, but - * doing so increases misconfiguration risk. */ -struct mp_desc_table { - struct fake_descriptor idt[IDTSZ]; /* IDT */ - struct fake_descriptor gdt[GDTSZ]; /* GDT */ - struct fake_descriptor ldt[LDTSZ]; /* LDT */ - struct i386_tss ktss; - struct i386_tss dbtss; -}; - -#define current_gdt() (current_cpu_datap()->cpu_desc_index.cdi_gdt) -#define current_idt() (current_cpu_datap()->cpu_desc_index.cdi_idt) -#define current_ldt() (current_cpu_datap()->cpu_desc_index.cdi_ldt) -#define current_ktss() (current_cpu_datap()->cpu_desc_index.cdi_ktss) -#define current_dbtss() (current_cpu_datap()->cpu_desc_index.cdi_dbtss) - -#define gdt_desc_p(sel) \ - ((struct real_descriptor *)¤t_gdt()[sel_idx(sel)]) -#define ldt_desc_p(sel) \ - ((struct real_descriptor *)¤t_ldt()[sel_idx(sel)]) - -extern void mp_desc_init(cpu_data_t *cdp, boolean_t is_boot_cpu); - -static inline boolean_t -valid_user_data_selector(uint16_t selector) -{ - sel_t sel = selector_to_sel(selector); - - if (selector == 0) - return (TRUE); - - if (sel.ti == SEL_LDT) - return (TRUE); - else if (sel.index < GDTSZ) { - if ((gdt_desc_p(selector)->access & ACC_PL_U) == ACC_PL_U) - return (TRUE); - } - - return (FALSE); -} - -static inline boolean_t -valid_user_code_selector(uint16_t selector) -{ - sel_t sel = selector_to_sel(selector); - - if (selector == 0) - return (FALSE); - - if (sel.ti == SEL_LDT) { - if (sel.rpl == USER_PRIV) - return (TRUE); - } - else if (sel.index < GDTSZ && sel.rpl == USER_PRIV) { - if ((gdt_desc_p(selector)->access & ACC_PL_U) == ACC_PL_U) - return (TRUE); - } - - return (FALSE); -} - -static inline boolean_t -valid_user_stack_selector(uint16_t selector) -{ - sel_t sel = selector_to_sel(selector); - - if (selector == 0) - return (FALSE); - - if (sel.ti == SEL_LDT) { - if (sel.rpl == USER_PRIV) - return (TRUE); - } - else if (sel.index < GDTSZ && sel.rpl == USER_PRIV) { - if ((gdt_desc_p(selector)->access & ACC_PL_U) == ACC_PL_U) - return (TRUE); - } - - return (FALSE); -} +#define FSTK_SZ (PAGE_SIZE/2) +typedef struct cpu_desc_table64 { + struct fake_descriptor gdt[GDTSZ] __attribute__ ((aligned(16))); + struct x86_64_tss ktss __attribute__ ((aligned(16))); + struct sysenter_stack sstk __attribute__ ((aligned(16))); + uint8_t *fstkp; +} cpu_desc_table64_t; + +typedef struct { + uint8_t fstk[FSTK_SZ] __attribute__ ((aligned(16))); +} cpu_fault_stack_t; + +#define current_gdt() (current_cpu_datap()->cpu_desc_index.cdi_gdtb.ptr) +#define current_idt() (current_cpu_datap()->cpu_desc_index.cdi_idtb.ptr) +#define current_ldt() (current_cpu_datap()->cpu_desc_index.cdi_ldtb) +#define current_ktss() (current_cpu_datap()->cpu_desc_index.cdi_ktssb) +#define current_sstk() (current_cpu_datap()->cpu_desc_index.cdi_sstkb) + +#define current_ktss64() ((struct x86_64_tss *) current_ktss()) +#define current_sstk64() ((addr64_t *) current_sstk()) + +#define gdt_desc_p(sel) \ + (&((struct real_descriptor *)current_gdt())[sel_idx(sel)]) +#define ldt_desc_p(sel) \ + (¤t_ldt()[sel_idx(sel)]) + +extern void cpu_syscall_init(cpu_data_t *cdp); + +extern void cpu_desc_init(cpu_data_t *cdp); +extern void cpu_desc_load(cpu_data_t *cdp); + +extern boolean_t +valid_user_data_selector(uint16_t selector); + +extern boolean_t +valid_user_code_selector(uint16_t selector); + +extern boolean_t +valid_user_stack_selector(uint16_t selector); extern boolean_t valid_user_segment_selectors(uint16_t cs, - uint16_t ss, - uint16_t ds, - uint16_t es, - uint16_t fs, - uint16_t gs); + uint16_t ss, + uint16_t ds, + uint16_t es, + uint16_t fs, + uint16_t gs); __END_DECLS -#endif /* _I386_MP_DESC_H_ */ +#endif /* _X86_64_MP_DESC_H_ */