Date: Mon, 19 Mar 2012 21:24:50 +0000 (UTC) From: Tijl Coosemans <tijl@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r233203 - in head/sys: amd64/include i386/include ia64/ia32 x86/include Message-ID: <201203192124.q2JLOoZQ086847@svn.freebsd.org>
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Author: tijl Date: Mon Mar 19 21:24:50 2012 New Revision: 233203 URL: http://svn.freebsd.org/changeset/base/233203 Log: Move userland bits (and some common kernel bits) from amd64 and i386 segments.h to a new x86 segments.h. Add __packed attribute to some structs (just to be sure). Also make it clear that i386 GDT and LDT entries are used in ia64 code. Added: head/sys/x86/include/segments.h (contents, props changed) Modified: head/sys/amd64/include/segments.h head/sys/i386/include/segments.h head/sys/ia64/ia32/ia32_signal.c Modified: head/sys/amd64/include/segments.h ============================================================================== --- head/sys/amd64/include/segments.h Mon Mar 19 21:09:12 2012 (r233202) +++ head/sys/amd64/include/segments.h Mon Mar 19 21:24:50 2012 (r233203) @@ -41,45 +41,7 @@ * AMD64 Segmentation Data Structures and definitions */ -/* - * Selectors - */ - -#define SEL_RPL_MASK 3 /* requester priv level */ -#define ISPL(s) ((s)&3) /* what is the priority level of a selector */ -#define SEL_KPL 0 /* kernel priority level */ -#define SEL_UPL 3 /* user priority level */ -#define ISLDT(s) ((s)&SEL_LDT) /* is it local or global */ -#define SEL_LDT 4 /* local descriptor table */ -#define IDXSEL(s) (((s)>>3) & 0x1fff) /* index of selector */ -#define LSEL(s,r) (((s)<<3) | SEL_LDT | r) /* a local selector */ -#define GSEL(s,r) (((s)<<3) | r) /* a global selector */ - -/* - * User segment descriptors (%cs, %ds etc for compatability apps. 64 bit wide) - * For long-mode apps, %cs only has the conforming bit in sd_type, the sd_dpl, - * sd_p, sd_l and sd_def32 which must be zero). %ds only has sd_p. - */ -struct user_segment_descriptor { - u_int64_t sd_lolimit:16; /* segment extent (lsb) */ - u_int64_t sd_lobase:24; /* segment base address (lsb) */ - u_int64_t sd_type:5; /* segment type */ - u_int64_t sd_dpl:2; /* segment descriptor priority level */ - u_int64_t sd_p:1; /* segment descriptor present */ - u_int64_t sd_hilimit:4; /* segment extent (msb) */ - u_int64_t sd_xx:1; /* unused */ - u_int64_t sd_long:1; /* long mode (cs only) */ - u_int64_t sd_def32:1; /* default 32 vs 16 bit size */ - u_int64_t sd_gran:1; /* limit granularity (byte/page units)*/ - u_int64_t sd_hibase:8; /* segment base address (msb) */ -} __packed; - -#define USD_GETBASE(sd) (((sd)->sd_lobase) | (sd)->sd_hibase << 24) -#define USD_SETBASE(sd, b) (sd)->sd_lobase = (b); \ - (sd)->sd_hibase = ((b) >> 24); -#define USD_GETLIMIT(sd) (((sd)->sd_lolimit) | (sd)->sd_hilimit << 16) -#define USD_SETLIMIT(sd, l) (sd)->sd_lolimit = (l); \ - (sd)->sd_hilimit = ((l) >> 16); +#include <x86/segments.h> /* * System segment descriptors (128 bit wide) @@ -100,66 +62,6 @@ struct system_segment_descriptor { } __packed; /* - * Gate descriptors (e.g. indirect descriptors, trap, interrupt etc. 128 bit) - * Only interrupt and trap gates have gd_ist. - */ -struct gate_descriptor { - u_int64_t gd_looffset:16; /* gate offset (lsb) */ - u_int64_t gd_selector:16; /* gate segment selector */ - u_int64_t gd_ist:3; /* IST table index */ - u_int64_t gd_xx:5; /* unused */ - u_int64_t gd_type:5; /* segment type */ - u_int64_t gd_dpl:2; /* segment descriptor priority level */ - u_int64_t gd_p:1; /* segment descriptor present */ - u_int64_t gd_hioffset:48 __packed; /* gate offset (msb) */ - u_int64_t sd_xx1:32; -} __packed; - -/* - * Generic descriptor - */ -union descriptor { - struct user_segment_descriptor sd; - struct gate_descriptor gd; -}; - - /* system segments and gate types */ -#define SDT_SYSNULL 0 /* system null */ -#define SDT_SYS286TSS 1 /* system 286 TSS available */ -#define SDT_SYSLDT 2 /* system 64 bit local descriptor table */ -#define SDT_SYS286BSY 3 /* system 286 TSS busy */ -#define SDT_SYS286CGT 4 /* system 286 call gate */ -#define SDT_SYSTASKGT 5 /* system task gate */ -#define SDT_SYS286IGT 6 /* system 286 interrupt gate */ -#define SDT_SYS286TGT 7 /* system 286 trap gate */ -#define SDT_SYSNULL2 8 /* system null again */ -#define SDT_SYSTSS 9 /* system available 64 bit TSS */ -#define SDT_SYSNULL3 10 /* system null again */ -#define SDT_SYSBSY 11 /* system busy 64 bit TSS */ -#define SDT_SYSCGT 12 /* system 64 bit call gate */ -#define SDT_SYSNULL4 13 /* system null again */ -#define SDT_SYSIGT 14 /* system 64 bit interrupt gate */ -#define SDT_SYSTGT 15 /* system 64 bit trap gate */ - - /* memory segment types */ -#define SDT_MEMRO 16 /* memory read only */ -#define SDT_MEMROA 17 /* memory read only accessed */ -#define SDT_MEMRW 18 /* memory read write */ -#define SDT_MEMRWA 19 /* memory read write accessed */ -#define SDT_MEMROD 20 /* memory read only expand dwn limit */ -#define SDT_MEMRODA 21 /* memory read only expand dwn limit accessed */ -#define SDT_MEMRWD 22 /* memory read write expand dwn limit */ -#define SDT_MEMRWDA 23 /* memory read write expand dwn limit accessed */ -#define SDT_MEME 24 /* memory execute only */ -#define SDT_MEMEA 25 /* memory execute only accessed */ -#define SDT_MEMER 26 /* memory execute read */ -#define SDT_MEMERA 27 /* memory execute read accessed */ -#define SDT_MEMEC 28 /* memory execute only conforming */ -#define SDT_MEMEAC 29 /* memory execute only accessed conforming */ -#define SDT_MEMERC 30 /* memory execute read conforming */ -#define SDT_MEMERAC 31 /* memory execute read accessed conforming */ - -/* * Software definitions are in this convenient format, * which are translated into inconvenient segment descriptors * when needed to be used by the 386 hardware @@ -184,56 +86,6 @@ struct region_descriptor { unsigned long rd_base:64 __packed; /* base address */ } __packed; -/* - * Size of IDT table - */ -#define NIDT 256 /* 32 reserved, 16 h/w, 0 s/w, linux's 0x80 */ -#define NRSVIDT 32 /* reserved entries for cpu exceptions */ - -/* - * Entries in the Interrupt Descriptor Table (IDT) - */ -#define IDT_DE 0 /* #DE: Divide Error */ -#define IDT_DB 1 /* #DB: Debug */ -#define IDT_NMI 2 /* Nonmaskable External Interrupt */ -#define IDT_BP 3 /* #BP: Breakpoint */ -#define IDT_OF 4 /* #OF: Overflow */ -#define IDT_BR 5 /* #BR: Bound Range Exceeded */ -#define IDT_UD 6 /* #UD: Undefined/Invalid Opcode */ -#define IDT_NM 7 /* #NM: No Math Coprocessor */ -#define IDT_DF 8 /* #DF: Double Fault */ -#define IDT_FPUGP 9 /* Coprocessor Segment Overrun */ -#define IDT_TS 10 /* #TS: Invalid TSS */ -#define IDT_NP 11 /* #NP: Segment Not Present */ -#define IDT_SS 12 /* #SS: Stack Segment Fault */ -#define IDT_GP 13 /* #GP: General Protection Fault */ -#define IDT_PF 14 /* #PF: Page Fault */ -#define IDT_MF 16 /* #MF: FPU Floating-Point Error */ -#define IDT_AC 17 /* #AC: Alignment Check */ -#define IDT_MC 18 /* #MC: Machine Check */ -#define IDT_XF 19 /* #XF: SIMD Floating-Point Exception */ -#define IDT_IO_INTS NRSVIDT /* Base of IDT entries for I/O interrupts. */ -#define IDT_DTRACE_RET 0x20 /* DTrace pid provider Interrupt Vector */ -#define IDT_SYSCALL 0x80 /* System Call Interrupt Vector */ - -/* - * Entries in the Global Descriptor Table (GDT) - */ -#define GNULL_SEL 0 /* Null Descriptor */ -#define GNULL2_SEL 1 /* Null Descriptor */ -#define GUFS32_SEL 2 /* User 32 bit %fs Descriptor */ -#define GUGS32_SEL 3 /* User 32 bit %gs Descriptor */ -#define GCODE_SEL 4 /* Kernel Code Descriptor */ -#define GDATA_SEL 5 /* Kernel Data Descriptor */ -#define GUCODE32_SEL 6 /* User 32 bit code Descriptor */ -#define GUDATA_SEL 7 /* User 32/64 bit Data Descriptor */ -#define GUCODE_SEL 8 /* User 64 bit Code Descriptor */ -#define GPROC0_SEL 9 /* TSS for entering kernel etc */ -/* slot 10 is second half of GPROC0_SEL */ -#define GUSERLDT_SEL 11 /* LDT */ -/* slot 11 is second half of GUSERLDT_SEL */ -#define NGDT 13 - #ifdef _KERNEL extern struct user_segment_descriptor gdt[]; extern struct soft_segment_descriptor gdt_segs[]; @@ -249,7 +101,6 @@ void ssdtosyssd(struct soft_segment_desc struct system_segment_descriptor *sdp); void update_gdt_gsbase(struct thread *td, uint32_t base); void update_gdt_fsbase(struct thread *td, uint32_t base); - #endif /* _KERNEL */ #endif /* !_MACHINE_SEGMENTS_H_ */ Modified: head/sys/i386/include/segments.h ============================================================================== --- head/sys/i386/include/segments.h Mon Mar 19 21:09:12 2012 (r233202) +++ head/sys/i386/include/segments.h Mon Mar 19 21:24:50 2012 (r233203) @@ -42,103 +42,7 @@ * William F. Jolitz (william@ernie.berkeley.edu) 6/20/1989 */ -/* - * Selectors - */ - -#define ISPL(s) ((s)&3) /* what is the priority level of a selector */ -#ifdef XEN -#define SEL_KPL 1 /* kernel priority level */ -#else -#define SEL_KPL 0 /* kernel priority level */ -#endif -#define SEL_UPL 3 /* user priority level */ -#define ISLDT(s) ((s)&SEL_LDT) /* is it local or global */ -#define SEL_LDT 4 /* local descriptor table */ -#define IDXSEL(s) (((s)>>3) & 0x1fff) /* index of selector */ -#define LSEL(s,r) (((s)<<3) | SEL_LDT | r) /* a local selector */ -#define GSEL(s,r) (((s)<<3) | r) /* a global selector */ - -/* - * Memory and System segment descriptors - */ -struct segment_descriptor { - unsigned sd_lolimit:16 ; /* segment extent (lsb) */ - unsigned sd_lobase:24 __packed; /* segment base address (lsb) */ - unsigned sd_type:5 ; /* segment type */ - unsigned sd_dpl:2 ; /* segment descriptor priority level */ - unsigned sd_p:1 ; /* segment descriptor present */ - unsigned sd_hilimit:4 ; /* segment extent (msb) */ - unsigned sd_xx:2 ; /* unused */ - unsigned sd_def32:1 ; /* default 32 vs 16 bit size */ - unsigned sd_gran:1 ; /* limit granularity (byte/page units)*/ - unsigned sd_hibase:8 ; /* segment base address (msb) */ -} ; - -#define USD_GETBASE(sd) (((sd)->sd_lobase) | (sd)->sd_hibase << 24) -#define USD_SETBASE(sd, b) (sd)->sd_lobase = (b); \ - (sd)->sd_hibase = ((b) >> 24); -#define USD_GETLIMIT(sd) (((sd)->sd_lolimit) | (sd)->sd_hilimit << 16) -#define USD_SETLIMIT(sd, l) (sd)->sd_lolimit = (l); \ - (sd)->sd_hilimit = ((l) >> 16); - -/* - * Gate descriptors (e.g. indirect descriptors) - */ -struct gate_descriptor { - unsigned gd_looffset:16 ; /* gate offset (lsb) */ - unsigned gd_selector:16 ; /* gate segment selector */ - unsigned gd_stkcpy:5 ; /* number of stack wds to cpy */ - unsigned gd_xx:3 ; /* unused */ - unsigned gd_type:5 ; /* segment type */ - unsigned gd_dpl:2 ; /* segment descriptor priority level */ - unsigned gd_p:1 ; /* segment descriptor present */ - unsigned gd_hioffset:16 ; /* gate offset (msb) */ -} ; - -/* - * Generic descriptor - */ -union descriptor { - struct segment_descriptor sd; - struct gate_descriptor gd; -}; - - /* system segments and gate types */ -#define SDT_SYSNULL 0 /* system null */ -#define SDT_SYS286TSS 1 /* system 286 TSS available */ -#define SDT_SYSLDT 2 /* system local descriptor table */ -#define SDT_SYS286BSY 3 /* system 286 TSS busy */ -#define SDT_SYS286CGT 4 /* system 286 call gate */ -#define SDT_SYSTASKGT 5 /* system task gate */ -#define SDT_SYS286IGT 6 /* system 286 interrupt gate */ -#define SDT_SYS286TGT 7 /* system 286 trap gate */ -#define SDT_SYSNULL2 8 /* system null again */ -#define SDT_SYS386TSS 9 /* system 386 TSS available */ -#define SDT_SYSNULL3 10 /* system null again */ -#define SDT_SYS386BSY 11 /* system 386 TSS busy */ -#define SDT_SYS386CGT 12 /* system 386 call gate */ -#define SDT_SYSNULL4 13 /* system null again */ -#define SDT_SYS386IGT 14 /* system 386 interrupt gate */ -#define SDT_SYS386TGT 15 /* system 386 trap gate */ - - /* memory segment types */ -#define SDT_MEMRO 16 /* memory read only */ -#define SDT_MEMROA 17 /* memory read only accessed */ -#define SDT_MEMRW 18 /* memory read write */ -#define SDT_MEMRWA 19 /* memory read write accessed */ -#define SDT_MEMROD 20 /* memory read only expand dwn limit */ -#define SDT_MEMRODA 21 /* memory read only expand dwn limit accessed */ -#define SDT_MEMRWD 22 /* memory read write expand dwn limit */ -#define SDT_MEMRWDA 23 /* memory read write expand dwn limit accessed */ -#define SDT_MEME 24 /* memory execute only */ -#define SDT_MEMEA 25 /* memory execute only accessed */ -#define SDT_MEMER 26 /* memory execute read */ -#define SDT_MEMERA 27 /* memory execute read accessed */ -#define SDT_MEMEC 28 /* memory execute only conforming */ -#define SDT_MEMEAC 29 /* memory execute only accessed conforming */ -#define SDT_MEMERC 30 /* memory execute read conforming */ -#define SDT_MEMERAC 31 /* memory execute read accessed conforming */ +#include <x86/segments.h> /* * Software definitions are in this convenient format, @@ -176,84 +80,6 @@ struct region_descriptor { /* other bits are affected descriptor index */ #define SEGEX_IDX(s) (((s)>>3)&0x1fff) -/* - * Size of IDT table - */ - -#define NIDT 256 /* 32 reserved, 0x80 syscall, most are h/w */ -#define NRSVIDT 32 /* reserved entries for cpu exceptions */ - -/* - * Entries in the Interrupt Descriptor Table (IDT) - */ -#define IDT_DE 0 /* #DE: Divide Error */ -#define IDT_DB 1 /* #DB: Debug */ -#define IDT_NMI 2 /* Nonmaskable External Interrupt */ -#define IDT_BP 3 /* #BP: Breakpoint */ -#define IDT_OF 4 /* #OF: Overflow */ -#define IDT_BR 5 /* #BR: Bound Range Exceeded */ -#define IDT_UD 6 /* #UD: Undefined/Invalid Opcode */ -#define IDT_NM 7 /* #NM: No Math Coprocessor */ -#define IDT_DF 8 /* #DF: Double Fault */ -#define IDT_FPUGP 9 /* Coprocessor Segment Overrun */ -#define IDT_TS 10 /* #TS: Invalid TSS */ -#define IDT_NP 11 /* #NP: Segment Not Present */ -#define IDT_SS 12 /* #SS: Stack Segment Fault */ -#define IDT_GP 13 /* #GP: General Protection Fault */ -#define IDT_PF 14 /* #PF: Page Fault */ -#define IDT_MF 16 /* #MF: FPU Floating-Point Error */ -#define IDT_AC 17 /* #AC: Alignment Check */ -#define IDT_MC 18 /* #MC: Machine Check */ -#define IDT_XF 19 /* #XF: SIMD Floating-Point Exception */ -#define IDT_IO_INTS NRSVIDT /* Base of IDT entries for I/O interrupts. */ -#define IDT_DTRACE_RET 0x20 /* DTrace pid provider Interrupt Vector */ -#define IDT_SYSCALL 0x80 /* System Call Interrupt Vector */ - -/* - * Entries in the Global Descriptor Table (GDT) - * Note that each 4 entries share a single 32 byte L1 cache line. - * Some of the fast syscall instructions require a specific order here. - */ -#define GNULL_SEL 0 /* Null Descriptor */ -#define GPRIV_SEL 1 /* SMP Per-Processor Private Data */ -#define GUFS_SEL 2 /* User %fs Descriptor (order critical: 1) */ -#define GUGS_SEL 3 /* User %gs Descriptor (order critical: 2) */ -#define GCODE_SEL 4 /* Kernel Code Descriptor (order critical: 1) */ -#define GDATA_SEL 5 /* Kernel Data Descriptor (order critical: 2) */ -#define GUCODE_SEL 6 /* User Code Descriptor (order critical: 3) */ -#define GUDATA_SEL 7 /* User Data Descriptor (order critical: 4) */ -#define GBIOSLOWMEM_SEL 8 /* BIOS low memory access (must be entry 8) */ -#define GPROC0_SEL 9 /* Task state process slot zero and up */ -#define GLDT_SEL 10 /* Default User LDT */ -#define GUSERLDT_SEL 11 /* User LDT */ -#define GPANIC_SEL 12 /* Task state to consider panic from */ -#define GBIOSCODE32_SEL 13 /* BIOS interface (32bit Code) */ -#define GBIOSCODE16_SEL 14 /* BIOS interface (16bit Code) */ -#define GBIOSDATA_SEL 15 /* BIOS interface (Data) */ -#define GBIOSUTIL_SEL 16 /* BIOS interface (Utility) */ -#define GBIOSARGS_SEL 17 /* BIOS interface (Arguments) */ -#define GNDIS_SEL 18 /* For the NDIS layer */ - -#ifdef XEN -#define NGDT 9 -#else -#define NGDT 19 -#endif - -/* - * Entries in the Local Descriptor Table (LDT) - */ -#define LSYS5CALLS_SEL 0 /* forced by intel BCS */ -#define LSYS5SIGR_SEL 1 -#define L43BSDCALLS_SEL 2 /* notyet */ -#define LUCODE_SEL 3 -#define LSOL26CALLS_SEL 4 /* Solaris >= 2.6 system call gate */ -#define LUDATA_SEL 5 -/* separate stack, es,fs,gs sels ? */ -/* #define LPOSIXCALLS_SEL 5*/ /* notyet */ -#define LBSDICALLS_SEL 16 /* BSDI system call gate */ -#define NLDT (LBSDICALLS_SEL + 1) - #ifdef _KERNEL extern int _default_ldt; #ifdef XEN Modified: head/sys/ia64/ia32/ia32_signal.c ============================================================================== --- head/sys/ia64/ia32/ia32_signal.c Mon Mar 19 21:09:12 2012 (r233202) +++ head/sys/ia64/ia32/ia32_signal.c Mon Mar 19 21:24:50 2012 (r233203) @@ -73,7 +73,7 @@ __FBSDID("$FreeBSD$"); #include <compat/freebsd32/freebsd32_proto.h> #include <compat/ia32/ia32_signal.h> #include <i386/include/psl.h> -#include <i386/include/segments.h> +#include <x86/include/segments.h> #include <i386/include/specialreg.h> char ia32_sigcode[] = { Added: head/sys/x86/include/segments.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/x86/include/segments.h Mon Mar 19 21:24:50 2012 (r233203) @@ -0,0 +1,286 @@ +/*- + * Copyright (c) 1989, 1990 William F. Jolitz + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * from: @(#)segments.h 7.1 (Berkeley) 5/9/91 + * $FreeBSD$ + */ + +#ifndef _X86_SEGMENTS_H_ +#define _X86_SEGMENTS_H_ + +/* + * X86 Segmentation Data Structures and definitions + */ + +/* + * Selectors + */ +#define SEL_RPL_MASK 3 /* requester priv level */ +#define ISPL(s) ((s)&3) /* priority level of a selector */ +#ifdef XEN +#define SEL_KPL 1 /* kernel priority level */ +#else +#define SEL_KPL 0 /* kernel priority level */ +#endif +#define SEL_UPL 3 /* user priority level */ +#define ISLDT(s) ((s)&SEL_LDT) /* is it local or global */ +#define SEL_LDT 4 /* local descriptor table */ +#define IDXSEL(s) (((s)>>3) & 0x1fff) /* index of selector */ +#define LSEL(s,r) (((s)<<3) | SEL_LDT | r) /* a local selector */ +#define GSEL(s,r) (((s)<<3) | r) /* a global selector */ + +/* + * User segment descriptors (%cs, %ds etc for i386 apps. 64 bit wide) + * For long-mode apps, %cs only has the conforming bit in sd_type, the sd_dpl, + * sd_p, sd_l and sd_def32 which must be zero). %ds only has sd_p. + */ +struct segment_descriptor { + unsigned sd_lolimit:16; /* segment extent (lsb) */ + unsigned sd_lobase:24; /* segment base address (lsb) */ + unsigned sd_type:5; /* segment type */ + unsigned sd_dpl:2; /* segment descriptor priority level */ + unsigned sd_p:1; /* segment descriptor present */ + unsigned sd_hilimit:4; /* segment extent (msb) */ + unsigned sd_xx:2; /* unused */ + unsigned sd_def32:1; /* default 32 vs 16 bit size */ + unsigned sd_gran:1; /* limit granularity (byte/page units)*/ + unsigned sd_hibase:8; /* segment base address (msb) */ +} __packed; + +struct user_segment_descriptor { + unsigned sd_lolimit:16; /* segment extent (lsb) */ + unsigned sd_lobase:24; /* segment base address (lsb) */ + unsigned sd_type:5; /* segment type */ + unsigned sd_dpl:2; /* segment descriptor priority level */ + unsigned sd_p:1; /* segment descriptor present */ + unsigned sd_hilimit:4; /* segment extent (msb) */ + unsigned sd_xx:1; /* unused */ + unsigned sd_long:1; /* long mode (cs only) */ + unsigned sd_def32:1; /* default 32 vs 16 bit size */ + unsigned sd_gran:1; /* limit granularity (byte/page units)*/ + unsigned sd_hibase:8; /* segment base address (msb) */ +} __packed; + +#define USD_GETBASE(sd) (((sd)->sd_lobase) | (sd)->sd_hibase << 24) +#define USD_SETBASE(sd, b) (sd)->sd_lobase = (b); \ + (sd)->sd_hibase = ((b) >> 24); +#define USD_GETLIMIT(sd) (((sd)->sd_lolimit) | (sd)->sd_hilimit << 16) +#define USD_SETLIMIT(sd, l) (sd)->sd_lolimit = (l); \ + (sd)->sd_hilimit = ((l) >> 16); + +#ifdef __i386__ +/* + * Gate descriptors (e.g. indirect descriptors) + */ +struct gate_descriptor { + unsigned gd_looffset:16; /* gate offset (lsb) */ + unsigned gd_selector:16; /* gate segment selector */ + unsigned gd_stkcpy:5; /* number of stack wds to cpy */ + unsigned gd_xx:3; /* unused */ + unsigned gd_type:5; /* segment type */ + unsigned gd_dpl:2; /* segment descriptor priority level */ + unsigned gd_p:1; /* segment descriptor present */ + unsigned gd_hioffset:16; /* gate offset (msb) */ +} __packed; + +/* + * Generic descriptor + */ +union descriptor { + struct segment_descriptor sd; + struct gate_descriptor gd; +}; +#else +/* + * Gate descriptors (e.g. indirect descriptors, trap, interrupt etc. 128 bit) + * Only interrupt and trap gates have gd_ist. + */ +struct gate_descriptor { + uint64_t gd_looffset:16; /* gate offset (lsb) */ + uint64_t gd_selector:16; /* gate segment selector */ + uint64_t gd_ist:3; /* IST table index */ + uint64_t gd_xx:5; /* unused */ + uint64_t gd_type:5; /* segment type */ + uint64_t gd_dpl:2; /* segment descriptor priority level */ + uint64_t gd_p:1; /* segment descriptor present */ + uint64_t gd_hioffset:48; /* gate offset (msb) */ + uint64_t sd_xx1:32; +} __packed; + +/* + * Generic descriptor + */ +union descriptor { + struct user_segment_descriptor sd; + struct gate_descriptor gd; +}; +#endif + + /* system segments and gate types */ +#define SDT_SYSNULL 0 /* system null */ +#define SDT_SYS286TSS 1 /* system 286 TSS available */ +#define SDT_SYSLDT 2 /* system local descriptor table */ +#define SDT_SYS286BSY 3 /* system 286 TSS busy */ +#define SDT_SYS286CGT 4 /* system 286 call gate */ +#define SDT_SYSTASKGT 5 /* system task gate */ +#define SDT_SYS286IGT 6 /* system 286 interrupt gate */ +#define SDT_SYS286TGT 7 /* system 286 trap gate */ +#define SDT_SYSNULL2 8 /* system null again */ +#define SDT_SYS386TSS 9 /* system 386 TSS available */ +#define SDT_SYSTSS 9 /* system available 64 bit TSS */ +#define SDT_SYSNULL3 10 /* system null again */ +#define SDT_SYS386BSY 11 /* system 386 TSS busy */ +#define SDT_SYSBSY 11 /* system busy 64 bit TSS */ +#define SDT_SYS386CGT 12 /* system 386 call gate */ +#define SDT_SYSCGT 12 /* system 64 bit call gate */ +#define SDT_SYSNULL4 13 /* system null again */ +#define SDT_SYS386IGT 14 /* system 386 interrupt gate */ +#define SDT_SYSIGT 14 /* system 64 bit interrupt gate */ +#define SDT_SYS386TGT 15 /* system 386 trap gate */ +#define SDT_SYSTGT 15 /* system 64 bit trap gate */ + + /* memory segment types */ +#define SDT_MEMRO 16 /* memory read only */ +#define SDT_MEMROA 17 /* memory read only accessed */ +#define SDT_MEMRW 18 /* memory read write */ +#define SDT_MEMRWA 19 /* memory read write accessed */ +#define SDT_MEMROD 20 /* memory read only expand dwn limit */ +#define SDT_MEMRODA 21 /* memory read only expand dwn limit accessed */ +#define SDT_MEMRWD 22 /* memory read write expand dwn limit */ +#define SDT_MEMRWDA 23 /* memory read write expand dwn limit accessed*/ +#define SDT_MEME 24 /* memory execute only */ +#define SDT_MEMEA 25 /* memory execute only accessed */ +#define SDT_MEMER 26 /* memory execute read */ +#define SDT_MEMERA 27 /* memory execute read accessed */ +#define SDT_MEMEC 28 /* memory execute only conforming */ +#define SDT_MEMEAC 29 /* memory execute only accessed conforming */ +#define SDT_MEMERC 30 /* memory execute read conforming */ +#define SDT_MEMERAC 31 /* memory execute read accessed conforming */ + +/* + * Size of IDT table + */ +#define NIDT 256 /* 32 reserved, 0x80 syscall, most are h/w */ +#define NRSVIDT 32 /* reserved entries for cpu exceptions */ + +/* + * Entries in the Interrupt Descriptor Table (IDT) + */ +#define IDT_DE 0 /* #DE: Divide Error */ +#define IDT_DB 1 /* #DB: Debug */ +#define IDT_NMI 2 /* Nonmaskable External Interrupt */ +#define IDT_BP 3 /* #BP: Breakpoint */ +#define IDT_OF 4 /* #OF: Overflow */ +#define IDT_BR 5 /* #BR: Bound Range Exceeded */ +#define IDT_UD 6 /* #UD: Undefined/Invalid Opcode */ +#define IDT_NM 7 /* #NM: No Math Coprocessor */ +#define IDT_DF 8 /* #DF: Double Fault */ +#define IDT_FPUGP 9 /* Coprocessor Segment Overrun */ +#define IDT_TS 10 /* #TS: Invalid TSS */ +#define IDT_NP 11 /* #NP: Segment Not Present */ +#define IDT_SS 12 /* #SS: Stack Segment Fault */ +#define IDT_GP 13 /* #GP: General Protection Fault */ +#define IDT_PF 14 /* #PF: Page Fault */ +#define IDT_MF 16 /* #MF: FPU Floating-Point Error */ +#define IDT_AC 17 /* #AC: Alignment Check */ +#define IDT_MC 18 /* #MC: Machine Check */ +#define IDT_XF 19 /* #XF: SIMD Floating-Point Exception */ +#define IDT_IO_INTS NRSVIDT /* Base of IDT entries for I/O interrupts. */ +#define IDT_DTRACE_RET 0x20 /* DTrace pid provider Interrupt Vector */ +#define IDT_SYSCALL 0x80 /* System Call Interrupt Vector */ + +#if defined(__i386__) || defined(__ia64__) +/* + * Entries in the Global Descriptor Table (GDT) + * Note that each 4 entries share a single 32 byte L1 cache line. + * Some of the fast syscall instructions require a specific order here. + */ +#define GNULL_SEL 0 /* Null Descriptor */ +#define GPRIV_SEL 1 /* SMP Per-Processor Private Data */ +#define GUFS_SEL 2 /* User %fs Descriptor (order critical: 1) */ +#define GUGS_SEL 3 /* User %gs Descriptor (order critical: 2) */ +#define GCODE_SEL 4 /* Kernel Code Descriptor (order critical: 1) */ +#define GDATA_SEL 5 /* Kernel Data Descriptor (order critical: 2) */ +#define GUCODE_SEL 6 /* User Code Descriptor (order critical: 3) */ +#define GUDATA_SEL 7 /* User Data Descriptor (order critical: 4) */ +#define GBIOSLOWMEM_SEL 8 /* BIOS low memory access (must be entry 8) */ +#define GPROC0_SEL 9 /* Task state process slot zero and up */ +#define GLDT_SEL 10 /* Default User LDT */ +#define GUSERLDT_SEL 11 /* User LDT */ +#define GPANIC_SEL 12 /* Task state to consider panic from */ +#define GBIOSCODE32_SEL 13 /* BIOS interface (32bit Code) */ +#define GBIOSCODE16_SEL 14 /* BIOS interface (16bit Code) */ +#define GBIOSDATA_SEL 15 /* BIOS interface (Data) */ +#define GBIOSUTIL_SEL 16 /* BIOS interface (Utility) */ +#define GBIOSARGS_SEL 17 /* BIOS interface (Arguments) */ +#define GNDIS_SEL 18 /* For the NDIS layer */ +#ifdef XEN +#define NGDT 9 +#else +#define NGDT 19 +#endif + +/* + * Entries in the Local Descriptor Table (LDT) + */ +#define LSYS5CALLS_SEL 0 /* forced by intel BCS */ +#define LSYS5SIGR_SEL 1 +#define L43BSDCALLS_SEL 2 /* notyet */ +#define LUCODE_SEL 3 +#define LSOL26CALLS_SEL 4 /* Solaris >= 2.6 system call gate */ +#define LUDATA_SEL 5 +/* separate stack, es,fs,gs sels ? */ +/* #define LPOSIXCALLS_SEL 5*/ /* notyet */ +#define LBSDICALLS_SEL 16 /* BSDI system call gate */ +#define NLDT (LBSDICALLS_SEL + 1) + +#else /* !__i386__ && !__ia64__ */ +/* + * Entries in the Global Descriptor Table (GDT) + */ +#define GNULL_SEL 0 /* Null Descriptor */ +#define GNULL2_SEL 1 /* Null Descriptor */ +#define GUFS32_SEL 2 /* User 32 bit %fs Descriptor */ +#define GUGS32_SEL 3 /* User 32 bit %gs Descriptor */ +#define GCODE_SEL 4 /* Kernel Code Descriptor */ +#define GDATA_SEL 5 /* Kernel Data Descriptor */ +#define GUCODE32_SEL 6 /* User 32 bit code Descriptor */ +#define GUDATA_SEL 7 /* User 32/64 bit Data Descriptor */ +#define GUCODE_SEL 8 /* User 64 bit Code Descriptor */ +#define GPROC0_SEL 9 /* TSS for entering kernel etc */ +/* slot 10 is second half of GPROC0_SEL */ +#define GUSERLDT_SEL 11 /* LDT */ +/* slot 12 is second half of GUSERLDT_SEL */ +#define NGDT 13 +#endif /* __i386__ || __ia64__ */ + +#endif /* !_X86_SEGMENTS_H_ */
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