1 /* 2 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 #ifndef _SYS_SEGMENTS_H 7 #define _SYS_SEGMENTS_H 8 9 #pragma ident "%Z%%M% %I% %E% SMI" 10 11 #ifdef __cplusplus 12 extern "C" { 13 #endif 14 15 /* 16 * Copyright (c) 1989, 1990 William F. Jolitz 17 * Copyright (c) 1990 The Regents of the University of California. 18 * All rights reserved. 19 * 20 * This code is derived from software contributed to Berkeley by 21 * William Jolitz. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the above copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * This product includes software developed by the University of 34 * California, Berkeley and its contributors. 35 * 4. Neither the name of the University nor the names of its contributors 36 * may be used to endorse or promote products derived from this software 37 * without specific prior written permission. 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 40 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 42 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 43 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 44 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 45 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 47 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 48 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 49 * SUCH DAMAGE. 50 * 51 * from: @(#)segments.h 7.1 (Berkeley) 5/9/91 52 * $FreeBSD: src/sys/i386/include/segments.h,v 1.34 2003/09/10 01:07:04 53 * jhb Exp $ 54 * 55 * 386 Segmentation Data Structures and definitions 56 * William F. Jolitz (william@ernie.berkeley.edu) 6/20/1989 57 */ 58 59 #include <sys/tss.h> 60 61 /* 62 * Selector register format 63 * CS, DS, ES, FS, GS, SS 64 * 65 * 15 3 2 1 0 66 * +---------------------+---+----+ 67 * | SI |TI |RPL | 68 * +---------------------+---+----+ 69 * 70 * SI = selector index 71 * TI = table indicator (0 = GDT, 1 = LDT) 72 * RPL = requestor privilege level 73 */ 74 #if !defined(_ASM) || defined(__GNUC_AS__) 75 #define IDXTOSEL(s) ((s) << 3) /* index to selector */ 76 #define SEL_GDT(s, r) (IDXTOSEL(s) | r) /* global sel */ 77 #else 78 #define IDXTOSEL(s) [s << 3] 79 #define SEL_GDT(s, r) [IDXTOSEL(s) | r] 80 #endif 81 82 #define SELTOIDX(s) ((s) >> 3) /* selector to index */ 83 #define SEL_KPL 0 /* kernel privilege level */ 84 #define SEL_UPL 3 /* user priority level */ 85 #define SEL_TI_LDT 4 /* local descriptor table */ 86 #define SEL_LDT(s) (IDXTOSEL(s) | SEL_TI_LDT | SEL_UPL) /* local sel */ 87 #define CPL_MASK 3 /* RPL mask for selector */ 88 #define SELISLDT(s) (((s) & SEL_TI_LDT) == SEL_TI_LDT) 89 #define SELISUPL(s) (((s) & CPL_MASK) == SEL_UPL) 90 91 #ifndef _ASM 92 93 typedef uint16_t selector_t; /* selector reigster */ 94 95 /* 96 * Hardware descriptor table register format for GDT and IDT. 97 */ 98 #if defined(__amd64) 99 100 #pragma pack(2) 101 typedef struct { 102 uint16_t dtr_limit; /* table limit */ 103 uint64_t dtr_base; /* table base address */ 104 } desctbr_t; 105 #pragma pack() 106 107 #elif defined(__i386) 108 109 #pragma pack(2) 110 typedef struct { 111 uint16_t dtr_limit; /* table limit */ 112 uint32_t dtr_base; /* table base address */ 113 } desctbr_t; 114 #pragma pack() 115 116 #endif /* __i386 */ 117 118 /* 119 * Functions for loading and storing descriptor table 120 * registers. 121 */ 122 extern void rd_idtr(desctbr_t *); 123 extern void wr_idtr(desctbr_t *); 124 extern void rd_gdtr(desctbr_t *); 125 extern void wr_gdtr(desctbr_t *); 126 extern void wr_ldtr(selector_t); 127 extern selector_t rd_ldtr(void); 128 extern void wr_tsr(selector_t); 129 extern void kmdb_enter(void); 130 131 #if defined(__amd64) 132 extern void clr_ldt_sregs(void); 133 134 /* 135 * inlines for update_segregs 136 */ 137 extern void __set_ds(selector_t); 138 extern void __set_es(selector_t); 139 extern void __set_fs(selector_t); 140 extern void __set_gs(selector_t); 141 extern void __swapgs(void); 142 #endif /* __amd64 */ 143 144 #if defined(__amd64) 145 extern void load_segment_registers(selector_t, selector_t, selector_t, 146 selector_t); /* (alphabetical) */ 147 #elif defined(__i386) 148 extern void load_segment_registers(selector_t, selector_t, selector_t, 149 selector_t, selector_t, selector_t); /* (alphabetical) */ 150 #endif /* __i386 */ 151 152 #if !defined(__amd64) 153 154 /* 155 * User segment descriptors (code and data). 156 * Legacy mode 64-bits wide. 157 */ 158 typedef struct user_desc { 159 uint32_t usd_lolimit:16; /* segment limit 15:0 */ 160 uint32_t usd_lobase:16; /* segment base 15:0 */ 161 uint32_t usd_midbase:8; /* segment base 23:16 */ 162 uint32_t usd_type:5; /* segment type, includes S bit */ 163 uint32_t usd_dpl:2; /* segment descriptor priority level */ 164 uint32_t usd_p:1; /* segment descriptor present */ 165 uint32_t usd_hilimit:4; /* segment limit 19:16 */ 166 uint32_t usd_avl:1; /* available to sw, but not used */ 167 uint32_t usd_reserved:1; /* unused, ignored */ 168 uint32_t usd_def32:1; /* default 32 vs 16 bit operand */ 169 uint32_t usd_gran:1; /* limit units (bytes vs pages) */ 170 uint32_t usd_hibase:8; /* segment base 31:24 */ 171 } user_desc_t; 172 173 #define USEGD_GETBASE(usd) ((usd)->usd_lobase | \ 174 (usd)->usd_midbase << 16 | \ 175 (usd)->usd_hibase << (16 + 8)) 176 177 #define USEGD_SETBASE(usd, b) ((usd)->usd_lobase = (b), \ 178 (usd)->usd_midbase = (b) >> 16, \ 179 (usd)->usd_hibase = (b) >> (16 + 8)) 180 181 #define USEGD_GETLIMIT(usd) ((usd)->usd_lolimit | \ 182 (usd)->usd_hilimit << 16) 183 184 #define USEGD_SETLIMIT(usd, lim) ((usd)->usd_lolimit = lim, \ 185 (usd)->usd_hilimit = lim >> 16) 186 187 #define USD_TYPESHIFT 5 /* size of usd_type field */ 188 189 #else /* __amd64 */ 190 191 /* 192 * User segment descriptors. 193 * Long mode 64-bits wide. 194 * 195 * In 32-bit compatibility mode (%cs:usd_long=0) all fields are interpreted 196 * as in legacy mode for both code and data. 197 * 198 * In 64-bit mode (%cs:usd_long=1) code segments only have the conforming 199 * bit in usd_type, usd_dpl, usd_p, usd_long and usd_def32=0. usd_def32 200 * must be zero in 64-bit mode. Setting it to 1 is reserved for future use. 201 * All other fields are loaded but ignored by hardware. 202 * 203 * 64-bit data segments only have usd_p. All other fields are loaded but 204 * ignored by hardware when in 64-bit mode. 205 */ 206 typedef struct user_desc { 207 uint64_t usd_lolimit:16; /* segment limit 15:0 */ 208 uint64_t usd_lobase:16; /* segment base 15:0 */ 209 uint64_t usd_midbase:8; /* segment base 23:16 */ 210 uint64_t usd_type:5; /* segment type, includes S bit */ 211 uint64_t usd_dpl:2; /* segment descriptor priority level */ 212 uint64_t usd_p:1; /* segment descriptor present */ 213 uint64_t usd_hilimit:4; /* segment limit 19:16 */ 214 uint64_t usd_avl:1; /* available to sw, but not used */ 215 uint64_t usd_long:1; /* long mode (%cs only) */ 216 uint64_t usd_def32:1; /* default 32 vs 16 bit operand */ 217 uint64_t usd_gran:1; /* limit units (bytes vs page) */ 218 uint64_t usd_hibase:8; /* segment base 31:24 */ 219 } user_desc_t; 220 221 #define USEGD_GETBASE(usd) ((usd)->usd_lobase | \ 222 (usd)->usd_midbase << 16 | \ 223 (usd)->usd_hibase << (16 + 8)) 224 225 #define USEGD_SETBASE(usd, b) ((usd)->usd_lobase = (b), \ 226 (usd)->usd_midbase = (b) >> 16, \ 227 (usd)->usd_hibase = (b) >> (16 + 8)) 228 229 #define USEGD_GETLIMIT(usd) ((usd)->usd_lolimit | \ 230 (usd)->usd_hilimit << 16) 231 232 #define USEGD_SETLIMIT(usd, lim) ((usd)->usd_lolimit = lim, \ 233 (usd)->usd_hilimit = lim >> 16) 234 235 #define USD_TYPESHIFT 5 /* size of usd_type field */ 236 237 #endif /* __amd64 */ 238 239 #if !defined(__amd64) 240 241 /* 242 * System segment descriptors for LDT and TSS segments. 243 * Legacy mode 64-bits wide. 244 */ 245 typedef struct system_desc { 246 uint32_t ssd_lolimit:16; /* segment limit 15:0 */ 247 uint32_t ssd_lobase:16; /* segment base 15:0 */ 248 uint32_t ssd_midbase:8; /* segment base 23:16 */ 249 uint32_t ssd_type:4; /* segment type */ 250 uint32_t ssd_zero:1; /* must be zero */ 251 uint32_t ssd_dpl:2; /* segment descriptor priority level */ 252 uint32_t ssd_p:1; /* segment descriptor present */ 253 uint32_t ssd_hilimit:4; /* segment limit 19:16 */ 254 uint32_t ssd_avl:1; /* available to sw, but not used */ 255 uint32_t ssd_reserved:2; /* unused, ignored */ 256 uint32_t ssd_gran:1; /* limit unit (bytes vs pages) */ 257 uint32_t ssd_hibase:8; /* segment base 31:24 */ 258 } system_desc_t; 259 260 #else /* __amd64 */ 261 262 /* 263 * System segment descriptors for LDT and TSS segments. 264 * Long mode 128-bits wide. 265 * 266 * 32-bit LDT and TSS descriptor types are redefined to 64-bit equivalents. 267 * All other legacy types are reserved and illegal. 268 */ 269 typedef struct system_desc { 270 uint64_t ssd_lolimit:16; /* segment limit 15:0 */ 271 uint64_t ssd_lobase:16; /* segment base 15:0 */ 272 uint64_t ssd_midbase:8; /* segment base 23:16 */ 273 uint64_t ssd_type:4; /* segment type */ 274 uint64_t ssd_zero1:1; /* must be zero */ 275 uint64_t ssd_dpl:2; /* segment descriptor priority level */ 276 uint64_t ssd_p:1; /* segment descriptor present */ 277 uint64_t ssd_hilimit:4; /* segment limit 19:16 */ 278 uint64_t ssd_avl:1; /* available to sw, but not used */ 279 uint64_t ssd_resv1:2; /* unused, ignored */ 280 uint64_t ssd_gran:1; /* limit unit (bytes vs pages) */ 281 uint64_t ssd_hibase:8; /* segment base 31:24 */ 282 uint64_t ssd_hi64base:32; /* segment base 63:32 */ 283 uint64_t ssd_resv2:8; /* unused, ignored */ 284 uint64_t ssd_zero2:5; /* must be zero */ 285 uint64_t ssd_resv3:19; /* unused, ignored */ 286 } system_desc_t; 287 288 #endif /* __amd64 */ 289 290 #define SYSSEGD_SETLIMIT(ssd, lim) ((ssd)->ssd_lolimit = lim, \ 291 (ssd)->ssd_hilimit = lim >> 16) 292 #if !defined(__amd64) 293 294 /* 295 * System gate segment descriptors for interrupt, trap, call and task gates. 296 * Legacy mode 64-bits wide. 297 */ 298 typedef struct gate_desc { 299 uint32_t sgd_looffset:16; /* segment code offset 15:0 */ 300 uint32_t sgd_selector:16; /* target code or task selector */ 301 uint32_t sgd_stkcpy:5; /* number of stack wds to cpy */ 302 uint32_t sgd_resv:3; /* unused, ignored */ 303 uint32_t sgd_type:5; /* segment type, includes S bit */ 304 uint32_t sgd_dpl:2; /* segment descriptor priority level */ 305 uint32_t sgd_p:1; /* segment descriptor present */ 306 uint32_t sgd_hioffset:16; /* code seg off 31:16 */ 307 } gate_desc_t; 308 309 #define GATESEG_GETOFFSET(sgd) ((sgd)->sgd_looffset | \ 310 (sgd)->sgd_hioffset << 16) 311 312 #else /* __amd64 */ 313 314 /* 315 * System segment descriptors for interrupt, trap and call gates. 316 * Long mode 128-bits wide. 317 * 318 * 32-bit interrupt, trap and call gate types are redefined to 64-bit 319 * equivalents. Task gates along with all other legacy types are reserved 320 * and illegal. 321 */ 322 typedef struct gate_desc { 323 uint64_t sgd_looffset:16; /* segment code offset 15:0 */ 324 uint64_t sgd_selector:16; /* target code or task selector */ 325 uint64_t sgd_ist:3; /* IST table index */ 326 uint64_t sgd_resv1:5; /* unused, ignored */ 327 uint64_t sgd_type:5; /* segment type, includes S bit */ 328 uint64_t sgd_dpl:2; /* segment descriptor priority level */ 329 uint64_t sgd_p:1; /* segment descriptor present */ 330 uint64_t sgd_hioffset:16; /* segment code offset 31:16 */ 331 uint64_t sgd_hi64offset:32; /* segment code offset 63:32 */ 332 uint64_t sgd_resv2:8; /* unused, ignored */ 333 uint64_t sgd_zero:5; /* call gate only: must be zero */ 334 uint64_t sgd_resv3:19; /* unused, ignored */ 335 } gate_desc_t; 336 337 #define GATESEG_GETOFFSET(sgd) ((sgd)->sgd_looffset | \ 338 (sgd)->sgd_hioffset << 16 | \ 339 (sgd)->sgd_hi64offset << 32) 340 341 #endif /* __amd64 */ 342 343 /* 344 * functions for initializing and updating segment descriptors. 345 */ 346 #if defined(__amd64) 347 348 extern void set_usegd(user_desc_t *, uint_t, void *, size_t, uint_t, uint_t, 349 uint_t, uint_t); 350 351 #elif defined(__i386) 352 353 extern void set_usegd(user_desc_t *, void *, size_t, uint_t, uint_t, 354 uint_t, uint_t); 355 356 #endif /* __i386 */ 357 358 extern void set_gatesegd(gate_desc_t *, void (*)(void), selector_t, 359 uint_t, uint_t); 360 361 void set_syssegd(system_desc_t *, void *, size_t, uint_t, uint_t); 362 363 void init_boot_gdt(user_desc_t *); 364 365 #endif /* _ASM */ 366 367 /* 368 * Common segment parameter defintions for granularity, default 369 * operand size and operaton mode. 370 */ 371 #define SDP_BYTES 0 /* segment limit scaled to bytes */ 372 #define SDP_PAGES 1 /* segment limit scaled to pages */ 373 #define SDP_OP32 1 /* code and data default operand = 32 bits */ 374 #define SDP_LONG 1 /* long mode code segment (64 bits) */ 375 #define SDP_SHORT 0 /* compat/legacy code segment (32 bits) */ 376 /* 377 * System segments and gate types. 378 * 379 * In long mode i386 32-bit ldt, tss, call, interrupt and trap gate 380 * types are redefined into 64-bit equivalents. 381 */ 382 #define SDT_SYSNULL 0 /* system null */ 383 #define SDT_SYS286TSS 1 /* system 286 TSS available */ 384 #define SDT_SYSLDT 2 /* system local descriptor table */ 385 #define SDT_SYS286BSY 3 /* system 286 TSS busy */ 386 #define SDT_SYS286CGT 4 /* system 286 call gate */ 387 #define SDT_SYSTASKGT 5 /* system task gate */ 388 #define SDT_SYS286IGT 6 /* system 286 interrupt gate */ 389 #define SDT_SYS286TGT 7 /* system 286 trap gate */ 390 #define SDT_SYSNULL2 8 /* system null again */ 391 #define SDT_SYSTSS 9 /* system TSS available */ 392 #define SDT_SYSNULL3 10 /* system null again */ 393 #define SDT_SYSTSSBSY 11 /* system TSS busy */ 394 #define SDT_SYSCGT 12 /* system call gate */ 395 #define SDT_SYSNULL4 13 /* system null again */ 396 #define SDT_SYSIGT 14 /* system interrupt gate */ 397 #define SDT_SYSTGT 15 /* system trap gate */ 398 399 /* 400 * Memory segment types. 401 * 402 * While in long mode expand-down, writable and accessed type field 403 * attributes are ignored. Only the conforming bit is loaded by hardware 404 * for long mode code segment descriptors. 405 */ 406 #define SDT_MEMRO 16 /* read only */ 407 #define SDT_MEMROA 17 /* read only accessed */ 408 #define SDT_MEMRW 18 /* read write */ 409 #define SDT_MEMRWA 19 /* read write accessed */ 410 #define SDT_MEMROD 20 /* read only expand dwn limit */ 411 #define SDT_MEMRODA 21 /* read only expand dwn limit accessed */ 412 #define SDT_MEMRWD 22 /* read write expand dwn limit */ 413 #define SDT_MEMRWDA 23 /* read write expand dwn limit accessed */ 414 #define SDT_MEME 24 /* execute only */ 415 #define SDT_MEMEA 25 /* execute only accessed */ 416 #define SDT_MEMER 26 /* execute read */ 417 #define SDT_MEMERA 27 /* execute read accessed */ 418 #define SDT_MEMEC 28 /* execute only conforming */ 419 #define SDT_MEMEAC 29 /* execute only accessed conforming */ 420 #define SDT_MEMERC 30 /* execute read conforming */ 421 #define SDT_MEMERAC 31 /* execute read accessed conforming */ 422 423 /* 424 * Entries in the Interrupt Descriptor Table (IDT) 425 */ 426 #define IDT_DE 0 /* #DE: Divide Error */ 427 #define IDT_DB 1 /* #DB: Debug */ 428 #define IDT_NMI 2 /* Nonmaskable External Interrupt */ 429 #define IDT_BP 3 /* #BP: Breakpoint */ 430 #define IDT_OF 4 /* #OF: Overflow */ 431 #define IDT_BR 5 /* #BR: Bound Range Exceeded */ 432 #define IDT_UD 6 /* #UD: Undefined/Invalid Opcode */ 433 #define IDT_NM 7 /* #NM: No Math Coprocessor */ 434 #define IDT_DF 8 /* #DF: Double Fault */ 435 #define IDT_FPUGP 9 /* Coprocessor Segment Overrun */ 436 #define IDT_TS 10 /* #TS: Invalid TSS */ 437 #define IDT_NP 11 /* #NP: Segment Not Present */ 438 #define IDT_SS 12 /* #SS: Stack Segment Fault */ 439 #define IDT_GP 13 /* #GP: General Protection Fault */ 440 #define IDT_PF 14 /* #PF: Page Fault */ 441 #define IDT_MF 16 /* #MF: FPU Floating-Point Error */ 442 #define IDT_AC 17 /* #AC: Alignment Check */ 443 #define IDT_MC 18 /* #MC: Machine Check */ 444 #define IDT_XF 19 /* #XF: SIMD Floating-Point Exception */ 445 #define NIDT 256 /* size in entries of IDT */ 446 447 /* 448 * Entries in the Global Descriptor Table (GDT) 449 * 450 * We make sure to space the system descriptors (LDT's, TSS') 451 * such that they are double gdt slot aligned. This is because 452 * in long mode system segment decriptors expand to 128 bits. 453 * 454 * GDT_LWPFS and GDT_LWPGS must be the same for both 32 and 64-bit 455 * kernels. See setup_context in libc. 64-bit processes must set 456 * %fs or %gs to null selector to use 64-bit fsbase or gsbase 457 * respectively. 458 */ 459 #define GDT_NULL 0 /* null */ 460 #define GDT_B32DATA 1 /* dboot 32 bit data descriptor */ 461 #define GDT_B32CODE 2 /* dboot 32 bit code descriptor */ 462 #define GDT_B16CODE 3 /* bios call 16 bit code descriptor */ 463 #define GDT_B16DATA 4 /* bios call 16 bit data descriptor */ 464 #define GDT_B64CODE 5 /* dboot 64 bit code descriptor */ 465 #define GDT_BGSTMP 7 /* kmdb descriptor only used early in boot */ 466 467 #if defined(__amd64) 468 469 #define GDT_KCODE 6 /* kernel code seg %cs */ 470 #define GDT_KDATA 7 /* kernel data seg %ds */ 471 #define GDT_U32CODE 8 /* 32-bit process on 64-bit kernel %cs */ 472 #define GDT_UDATA 9 /* user data seg %ds (32 and 64 bit) */ 473 #define GDT_UCODE 10 /* native user code seg %cs */ 474 #define GDT_LDT 12 /* LDT for current process */ 475 #define GDT_KTSS 14 /* kernel tss */ 476 #define GDT_FS GDT_NULL /* kernel %fs segment selector */ 477 #define GDT_GS GDT_NULL /* kernel %gs segment selector */ 478 #define GDT_LWPFS 55 /* lwp private %fs segment selector (32-bit) */ 479 #define GDT_LWPGS 56 /* lwp private %gs segment selector (32-bit) */ 480 #define GDT_BRANDMIN 57 /* first entry in GDT for brand usage */ 481 #define GDT_BRANDMAX 61 /* last entry in GDT for brand usage */ 482 #define NGDT 62 /* number of entries in GDT */ 483 484 /* 485 * This selector is only used in the temporary GDT used to bring additional 486 * CPUs from 16-bit real mode into long mode in real_mode_start(). 487 */ 488 #define TEMPGDT_KCODE64 1 /* 64-bit code selector */ 489 490 #elif defined(__i386) 491 492 #define GDT_LDT 40 /* LDT for current process */ 493 #define GDT_KTSS 42 /* kernel tss */ 494 #define GDT_KCODE 43 /* kernel code seg %cs */ 495 #define GDT_KDATA 44 /* kernel data seg %ds */ 496 #define GDT_UCODE 45 /* native user code seg %cs */ 497 #define GDT_UDATA 46 /* user data seg %ds (32 and 64 bit) */ 498 #define GDT_DBFLT 47 /* double fault #DF selector */ 499 #define GDT_FS 53 /* kernel %fs segment selector */ 500 #define GDT_GS 54 /* kernel %gs segment selector */ 501 #define GDT_LWPFS 55 /* lwp private %fs segment selector */ 502 #define GDT_LWPGS 56 /* lwp private %gs segment selector */ 503 #define GDT_BRANDMIN 57 /* first entry in GDT for brand usage */ 504 #define GDT_BRANDMAX 61 /* last entry in GDT for brand usage */ 505 #define NGDT 90 /* number of entries in GDT */ 506 507 #endif /* __i386 */ 508 509 /* 510 * Convenient selector definitions. 511 */ 512 #define KCS_SEL SEL_GDT(GDT_KCODE, SEL_KPL) 513 #define KDS_SEL SEL_GDT(GDT_KDATA, SEL_KPL) 514 #define UCS_SEL SEL_GDT(GDT_UCODE, SEL_UPL) 515 #if defined(__amd64) 516 #define TEMP_CS64_SEL SEL_GDT(TEMPGDT_KCODE64, SEL_KPL) 517 #define U32CS_SEL SEL_GDT(GDT_U32CODE, SEL_UPL) 518 #endif /* __amd64 */ 519 #define UDS_SEL SEL_GDT(GDT_UDATA, SEL_UPL) 520 #define ULDT_SEL SEL_GDT(GDT_LDT, SEL_KPL) 521 #define KTSS_SEL SEL_GDT(GDT_KTSS, SEL_KPL) 522 #define DFTSS_SEL SEL_GDT(GDT_DBFLT, SEL_KPL) 523 #define KFS_SEL 0 524 #define KGS_SEL SEL_GDT(GDT_GS, SEL_KPL) 525 #define LWPFS_SEL SEL_GDT(GDT_LWPFS, SEL_UPL) 526 #define LWPGS_SEL SEL_GDT(GDT_LWPGS, SEL_UPL) 527 #define BRANDMIN_SEL SEL_GDT(GDT_BRANDMIN, SEL_UPL) 528 #define BRANDMAX_SEL SEL_GDT(GDT_BRANDMAX, SEL_UPL) 529 530 #define B64CODE_SEL SEL_GDT(GDT_B64CODE, SEL_KPL) 531 #define B32CODE_SEL SEL_GDT(GDT_B32CODE, SEL_KPL) 532 #define B32DATA_SEL SEL_GDT(GDT_B32DATA, SEL_KPL) 533 #define B16CODE_SEL SEL_GDT(GDT_B16CODE, SEL_KPL) 534 #define B16DATA_SEL SEL_GDT(GDT_B16DATA, SEL_KPL) 535 536 /* 537 * Temporary %gs descriptor used by kmdb with -d option. Only lives 538 * in boot's GDT and is not copied into kernel's GDT from boot. 539 */ 540 #define KMDBGS_SEL SEL_GDT(GDT_BGSTMP, SEL_KPL) 541 542 /* 543 * Selector used for kdi_idt when kmdb has taken over the IDT. 544 */ 545 #if defined(__amd64) 546 #define KMDBCODE_SEL B64CODE_SEL 547 #else 548 #define KMDBCODE_SEL B32CODE_SEL 549 #endif 550 551 /* 552 * Entries in default Local Descriptor Table (LDT) for every process. 553 */ 554 #define LDT_SYSCALL 0 /* call gate for libc.a (obsolete) */ 555 #define LDT_SIGCALL 1 /* EOL me, call gate for static sigreturn */ 556 #define LDT_RESVD1 2 /* old user %cs */ 557 #define LDT_RESVD2 3 /* old user %ds */ 558 #define LDT_ALTSYSCALL 4 /* alternate call gate for system calls */ 559 #define LDT_ALTSIGCALL 5 /* EOL me, alternate call gate for sigreturn */ 560 #define LDT_UDBASE 6 /* user descriptor base index */ 561 #define MINNLDT 64 /* Current min solaris ldt size */ 562 #define MAXNLDT 8192 /* max solaris ldt size */ 563 564 #ifndef _ASM 565 566 #pragma align 16(idt0) 567 extern gate_desc_t idt0[NIDT]; 568 extern desctbr_t idt0_default_reg; 569 extern user_desc_t *gdt0; 570 571 extern user_desc_t zero_udesc; 572 extern system_desc_t zero_sdesc; 573 574 #if defined(__amd64) 575 extern user_desc_t zero_u32desc; 576 #endif 577 578 #pragma align 16(ktss0) 579 extern struct tss ktss0; 580 581 #if defined(__i386) 582 extern struct tss dftss0; 583 #endif /* __i386 */ 584 585 extern void div0trap(), dbgtrap(), nmiint(), brktrap(), ovflotrap(); 586 extern void boundstrap(), invoptrap(), ndptrap(), syserrtrap(); 587 extern void invaltrap(), invtsstrap(), segnptrap(), stktrap(); 588 extern void gptrap(), pftrap(), ndperr(); 589 extern void overrun(), resvtrap(); 590 extern void _start(), cmnint(); 591 extern void achktrap(), mcetrap(); 592 extern void xmtrap(); 593 extern void fasttrap(); 594 extern void sys_int80(); 595 extern void brand_sys_int80(); 596 extern void dtrace_ret(); 597 598 #if !defined(__amd64) 599 extern void pentium_pftrap(); 600 #endif 601 602 #endif /* _ASM */ 603 604 #ifdef __cplusplus 605 } 606 #endif 607 608 #endif /* _SYS_SEGMENTS_H */ 609