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 (will...@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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