Mercurial > illumos > illumos-gate
annotate usr/src/uts/intel/ia32/os/archdep.c @ 4503:8cf697a3acff
6493689 Jvm crash: curthread set by kernel incorrect
| author | sudheer |
|---|---|
| date | Wed, 20 Jun 2007 03:26:40 -0700 |
| parents | 5903aece022d |
| children | af6e7cd796cc |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
|
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5 * Common Development and Distribution License (the "License"). |
|
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6 * You may not use this file except in compliance with the License. |
| 0 | 7 * |
| 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 9 * or http://www.opensolaris.org/os/licensing. | |
| 10 * See the License for the specific language governing permissions | |
| 11 * and limitations under the License. | |
| 12 * | |
| 13 * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 * If applicable, add the following below this CDDL HEADER, with the | |
| 16 * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 * | |
| 19 * CDDL HEADER END | |
| 20 */ | |
| 21 /* | |
| 3446 | 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
| 0 | 23 * Use is subject to license terms. |
| 24 */ | |
| 25 | |
| 26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ | |
| 27 /* All Rights Reserved */ | |
| 28 | |
| 29 | |
| 30 #pragma ident "%Z%%M% %I% %E% SMI" | |
| 31 | |
| 32 #include <sys/param.h> | |
| 33 #include <sys/types.h> | |
| 34 #include <sys/vmparam.h> | |
| 35 #include <sys/systm.h> | |
| 36 #include <sys/signal.h> | |
| 37 #include <sys/stack.h> | |
| 38 #include <sys/regset.h> | |
| 39 #include <sys/privregs.h> | |
| 40 #include <sys/frame.h> | |
| 41 #include <sys/proc.h> | |
| 42 #include <sys/psw.h> | |
| 43 #include <sys/siginfo.h> | |
| 44 #include <sys/cpuvar.h> | |
| 45 #include <sys/asm_linkage.h> | |
| 46 #include <sys/kmem.h> | |
| 47 #include <sys/errno.h> | |
| 48 #include <sys/bootconf.h> | |
| 49 #include <sys/archsystm.h> | |
| 50 #include <sys/debug.h> | |
| 51 #include <sys/elf.h> | |
| 52 #include <sys/spl.h> | |
| 53 #include <sys/time.h> | |
| 54 #include <sys/atomic.h> | |
| 55 #include <sys/sysmacros.h> | |
| 56 #include <sys/cmn_err.h> | |
| 57 #include <sys/modctl.h> | |
| 58 #include <sys/kobj.h> | |
| 59 #include <sys/panic.h> | |
| 60 #include <sys/reboot.h> | |
| 61 #include <sys/time.h> | |
| 62 #include <sys/fp.h> | |
| 63 #include <sys/x86_archext.h> | |
| 64 #include <sys/auxv.h> | |
| 65 #include <sys/auxv_386.h> | |
| 66 #include <sys/dtrace.h> | |
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67 #include <sys/brand.h> |
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68 #include <sys/machbrand.h> |
| 0 | 69 |
| 70 extern const struct fnsave_state x87_initial; | |
| 71 extern const struct fxsave_state sse_initial; | |
| 72 | |
| 73 /* | |
| 74 * Map an fnsave-formatted save area into an fxsave-formatted save area. | |
| 75 * | |
| 76 * Most fields are the same width, content and semantics. However | |
| 77 * the tag word is compressed. | |
| 78 */ | |
| 79 static void | |
| 80 fnsave_to_fxsave(const struct fnsave_state *fn, struct fxsave_state *fx) | |
| 81 { | |
| 82 uint_t i, tagbits; | |
| 83 | |
| 84 fx->fx_fcw = fn->f_fcw; | |
| 85 fx->fx_fsw = fn->f_fsw; | |
| 86 | |
| 87 /* | |
| 88 * copy element by element (because of holes) | |
| 89 */ | |
| 90 for (i = 0; i < 8; i++) | |
| 91 bcopy(&fn->f_st[i].fpr_16[0], &fx->fx_st[i].fpr_16[0], | |
| 92 sizeof (fn->f_st[0].fpr_16)); /* 80-bit x87-style floats */ | |
| 93 | |
| 94 /* | |
| 95 * synthesize compressed tag bits | |
| 96 */ | |
| 97 fx->fx_fctw = 0; | |
| 98 for (tagbits = fn->f_ftw, i = 0; i < 8; i++, tagbits >>= 2) | |
| 99 if ((tagbits & 3) != 3) | |
| 100 fx->fx_fctw |= (1 << i); | |
| 101 | |
| 102 fx->fx_fop = fn->f_fop; | |
| 103 | |
| 104 #if defined(__amd64) | |
| 105 fx->fx_rip = (uint64_t)fn->f_eip; | |
| 106 fx->fx_rdp = (uint64_t)fn->f_dp; | |
| 107 #else | |
| 108 fx->fx_eip = fn->f_eip; | |
| 109 fx->fx_cs = fn->f_cs; | |
| 110 fx->__fx_ign0 = 0; | |
| 111 fx->fx_dp = fn->f_dp; | |
| 112 fx->fx_ds = fn->f_ds; | |
| 113 fx->__fx_ign1 = 0; | |
| 114 #endif | |
| 115 } | |
| 116 | |
| 117 /* | |
| 118 * Map from an fxsave-format save area to an fnsave-format save area. | |
| 119 */ | |
| 120 static void | |
| 121 fxsave_to_fnsave(const struct fxsave_state *fx, struct fnsave_state *fn) | |
| 122 { | |
| 123 uint_t i, top, tagbits; | |
| 124 | |
| 125 fn->f_fcw = fx->fx_fcw; | |
| 126 fn->__f_ign0 = 0; | |
| 127 fn->f_fsw = fx->fx_fsw; | |
| 128 fn->__f_ign1 = 0; | |
| 129 | |
| 130 top = (fx->fx_fsw & FPS_TOP) >> 11; | |
| 131 | |
| 132 /* | |
| 133 * copy element by element (because of holes) | |
| 134 */ | |
| 135 for (i = 0; i < 8; i++) | |
| 136 bcopy(&fx->fx_st[i].fpr_16[0], &fn->f_st[i].fpr_16[0], | |
| 137 sizeof (fn->f_st[0].fpr_16)); /* 80-bit x87-style floats */ | |
| 138 | |
| 139 /* | |
| 140 * synthesize uncompressed tag bits | |
| 141 */ | |
| 142 fn->f_ftw = 0; | |
| 143 for (tagbits = fx->fx_fctw, i = 0; i < 8; i++, tagbits >>= 1) { | |
| 144 uint_t ibit, expo; | |
| 145 const uint16_t *fpp; | |
| 146 static const uint16_t zero[5] = { 0, 0, 0, 0, 0 }; | |
| 147 | |
| 148 if ((tagbits & 1) == 0) { | |
| 149 fn->f_ftw |= 3 << (i << 1); /* empty */ | |
| 150 continue; | |
| 151 } | |
| 152 | |
| 153 /* | |
| 154 * (tags refer to *physical* registers) | |
| 155 */ | |
| 156 fpp = &fx->fx_st[(i - top + 8) & 7].fpr_16[0]; | |
| 157 ibit = fpp[3] >> 15; | |
| 158 expo = fpp[4] & 0x7fff; | |
| 159 | |
| 160 if (ibit && expo != 0 && expo != 0x7fff) | |
| 161 continue; /* valid fp number */ | |
| 162 | |
| 163 if (bcmp(fpp, &zero, sizeof (zero))) | |
| 164 fn->f_ftw |= 2 << (i << 1); /* NaN */ | |
| 165 else | |
| 166 fn->f_ftw |= 1 << (i << 1); /* fp zero */ | |
| 167 } | |
| 168 | |
| 169 fn->f_fop = fx->fx_fop; | |
| 170 | |
| 171 fn->__f_ign2 = 0; | |
| 172 #if defined(__amd64) | |
| 173 fn->f_eip = (uint32_t)fx->fx_rip; | |
| 174 fn->f_cs = U32CS_SEL; | |
| 175 fn->f_dp = (uint32_t)fx->fx_rdp; | |
| 176 fn->f_ds = UDS_SEL; | |
| 177 #else | |
| 178 fn->f_eip = fx->fx_eip; | |
| 179 fn->f_cs = fx->fx_cs; | |
| 180 fn->f_dp = fx->fx_dp; | |
| 181 fn->f_ds = fx->fx_ds; | |
| 182 #endif | |
| 183 fn->__f_ign3 = 0; | |
| 184 } | |
| 185 | |
| 186 /* | |
| 187 * Map from an fpregset_t into an fxsave-format save area | |
| 188 */ | |
| 189 static void | |
| 190 fpregset_to_fxsave(const fpregset_t *fp, struct fxsave_state *fx) | |
| 191 { | |
| 192 #if defined(__amd64) | |
| 193 bcopy(fp, fx, sizeof (*fx)); | |
| 194 #else | |
| 195 const struct fpchip_state *fc = &fp->fp_reg_set.fpchip_state; | |
| 196 | |
| 197 fnsave_to_fxsave((const struct fnsave_state *)fc, fx); | |
| 198 fx->fx_mxcsr = fc->mxcsr; | |
| 199 bcopy(&fc->xmm[0], &fx->fx_xmm[0], sizeof (fc->xmm)); | |
| 200 #endif | |
| 201 /* | |
| 202 * avoid useless #gp exceptions - mask reserved bits | |
| 203 */ | |
| 204 fx->fx_mxcsr &= sse_mxcsr_mask; | |
| 205 } | |
| 206 | |
| 207 /* | |
| 208 * Map from an fxsave-format save area into a fpregset_t | |
| 209 */ | |
| 210 static void | |
| 211 fxsave_to_fpregset(const struct fxsave_state *fx, fpregset_t *fp) | |
| 212 { | |
| 213 #if defined(__amd64) | |
| 214 bcopy(fx, fp, sizeof (*fx)); | |
| 215 #else | |
| 216 struct fpchip_state *fc = &fp->fp_reg_set.fpchip_state; | |
| 217 | |
| 218 fxsave_to_fnsave(fx, (struct fnsave_state *)fc); | |
| 219 fc->mxcsr = fx->fx_mxcsr; | |
| 220 bcopy(&fx->fx_xmm[0], &fc->xmm[0], sizeof (fc->xmm)); | |
| 221 #endif | |
| 222 } | |
| 223 | |
| 224 #if defined(_SYSCALL32_IMPL) | |
| 225 static void | |
| 226 fpregset32_to_fxsave(const fpregset32_t *fp, struct fxsave_state *fx) | |
| 227 { | |
| 228 const struct fpchip32_state *fc = &fp->fp_reg_set.fpchip_state; | |
| 229 | |
| 230 fnsave_to_fxsave((const struct fnsave_state *)fc, fx); | |
| 231 /* | |
| 232 * avoid useless #gp exceptions - mask reserved bits | |
| 233 */ | |
| 234 fx->fx_mxcsr = sse_mxcsr_mask & fc->mxcsr; | |
| 235 bcopy(&fc->xmm[0], &fx->fx_xmm[0], sizeof (fc->xmm)); | |
| 236 } | |
| 237 | |
| 238 static void | |
| 239 fxsave_to_fpregset32(const struct fxsave_state *fx, fpregset32_t *fp) | |
| 240 { | |
| 241 struct fpchip32_state *fc = &fp->fp_reg_set.fpchip_state; | |
| 242 | |
| 243 fxsave_to_fnsave(fx, (struct fnsave_state *)fc); | |
| 244 fc->mxcsr = fx->fx_mxcsr; | |
| 245 bcopy(&fx->fx_xmm[0], &fc->xmm[0], sizeof (fc->xmm)); | |
| 246 } | |
| 247 | |
| 248 static void | |
| 249 fpregset_nto32(const fpregset_t *src, fpregset32_t *dst) | |
| 250 { | |
| 251 fxsave_to_fpregset32((struct fxsave_state *)src, dst); | |
| 252 dst->fp_reg_set.fpchip_state.status = | |
| 253 src->fp_reg_set.fpchip_state.status; | |
| 254 dst->fp_reg_set.fpchip_state.xstatus = | |
| 255 src->fp_reg_set.fpchip_state.xstatus; | |
| 256 } | |
| 257 | |
| 258 static void | |
| 259 fpregset_32ton(const fpregset32_t *src, fpregset_t *dst) | |
| 260 { | |
| 261 fpregset32_to_fxsave(src, (struct fxsave_state *)dst); | |
| 262 dst->fp_reg_set.fpchip_state.status = | |
| 263 src->fp_reg_set.fpchip_state.status; | |
| 264 dst->fp_reg_set.fpchip_state.xstatus = | |
| 265 src->fp_reg_set.fpchip_state.xstatus; | |
| 266 } | |
| 267 #endif | |
| 268 | |
| 269 /* | |
| 270 * Set floating-point registers from a native fpregset_t. | |
| 271 */ | |
| 272 void | |
| 273 setfpregs(klwp_t *lwp, fpregset_t *fp) | |
| 274 { | |
| 275 struct fpu_ctx *fpu = &lwp->lwp_pcb.pcb_fpu; | |
| 276 | |
| 277 if (fpu->fpu_flags & FPU_EN) { | |
| 278 if (!(fpu->fpu_flags & FPU_VALID)) { | |
| 279 /* | |
| 280 * FPU context is still active, release the | |
| 281 * ownership. | |
| 282 */ | |
| 283 fp_free(fpu, 0); | |
| 284 } | |
| 285 #if !defined(__amd64) | |
| 286 if (fp_kind == __FP_SSE) { | |
| 287 #endif | |
| 288 fpregset_to_fxsave(fp, &fpu->fpu_regs.kfpu_u.kfpu_fx); | |
| 289 fpu->fpu_regs.kfpu_xstatus = | |
| 290 fp->fp_reg_set.fpchip_state.xstatus; | |
| 291 #if !defined(__amd64) | |
| 292 } else | |
| 293 bcopy(fp, &fpu->fpu_regs.kfpu_u.kfpu_fn, | |
| 294 sizeof (fpu->fpu_regs.kfpu_u.kfpu_fn)); | |
| 295 #endif | |
| 296 fpu->fpu_regs.kfpu_status = fp->fp_reg_set.fpchip_state.status; | |
| 297 fpu->fpu_flags |= FPU_VALID; | |
| 298 } else { | |
| 299 /* | |
| 300 * If we are trying to change the FPU state of a thread which | |
| 301 * hasn't yet initialized floating point, store the state in | |
| 302 * the pcb and indicate that the state is valid. When the | |
| 303 * thread enables floating point, it will use this state instead | |
| 304 * of the default state. | |
| 305 */ | |
| 306 #if !defined(__amd64) | |
| 307 if (fp_kind == __FP_SSE) { | |
| 308 #endif | |
| 309 fpregset_to_fxsave(fp, &fpu->fpu_regs.kfpu_u.kfpu_fx); | |
| 310 fpu->fpu_regs.kfpu_xstatus = | |
| 311 fp->fp_reg_set.fpchip_state.xstatus; | |
| 312 #if !defined(__amd64) | |
| 313 } else | |
| 314 bcopy(fp, &fpu->fpu_regs.kfpu_u.kfpu_fn, | |
| 315 sizeof (fpu->fpu_regs.kfpu_u.kfpu_fn)); | |
| 316 #endif | |
| 317 fpu->fpu_regs.kfpu_status = fp->fp_reg_set.fpchip_state.status; | |
| 318 fpu->fpu_flags |= FPU_VALID; | |
| 319 } | |
| 320 } | |
| 321 | |
| 322 /* | |
| 323 * Get floating-point registers into a native fpregset_t. | |
| 324 */ | |
| 325 void | |
| 326 getfpregs(klwp_t *lwp, fpregset_t *fp) | |
| 327 { | |
| 328 struct fpu_ctx *fpu = &lwp->lwp_pcb.pcb_fpu; | |
| 329 | |
| 330 kpreempt_disable(); | |
| 331 if (fpu->fpu_flags & FPU_EN) { | |
| 332 /* | |
| 333 * If we have FPU hw and the thread's pcb doesn't have | |
| 334 * a valid FPU state then get the state from the hw. | |
| 335 */ | |
| 336 if (fpu_exists && ttolwp(curthread) == lwp && | |
| 337 !(fpu->fpu_flags & FPU_VALID)) | |
| 338 fp_save(fpu); /* get the current FPU state */ | |
| 339 } | |
| 340 | |
| 341 /* | |
| 342 * There are 3 possible cases we have to be aware of here: | |
| 343 * | |
| 344 * 1. FPU is enabled. FPU state is stored in the current LWP. | |
| 345 * | |
| 346 * 2. FPU is not enabled, and there have been no intervening /proc | |
| 347 * modifications. Return initial FPU state. | |
| 348 * | |
| 349 * 3. FPU is not enabled, but a /proc consumer has modified FPU state. | |
| 350 * FPU state is stored in the current LWP. | |
| 351 */ | |
| 352 if ((fpu->fpu_flags & FPU_EN) || (fpu->fpu_flags & FPU_VALID)) { | |
| 353 /* | |
| 354 * Cases 1 and 3. | |
| 355 */ | |
| 356 #if !defined(__amd64) | |
| 357 if (fp_kind == __FP_SSE) { | |
| 358 #endif | |
| 359 fxsave_to_fpregset(&fpu->fpu_regs.kfpu_u.kfpu_fx, fp); | |
| 360 fp->fp_reg_set.fpchip_state.xstatus = | |
| 361 fpu->fpu_regs.kfpu_xstatus; | |
| 362 #if !defined(__amd64) | |
| 363 } else | |
| 364 bcopy(&fpu->fpu_regs.kfpu_u.kfpu_fn, fp, | |
| 365 sizeof (fpu->fpu_regs.kfpu_u.kfpu_fn)); | |
| 366 #endif | |
| 367 fp->fp_reg_set.fpchip_state.status = fpu->fpu_regs.kfpu_status; | |
| 368 } else { | |
| 369 /* | |
| 370 * Case 2. | |
| 371 */ | |
| 372 #if !defined(__amd64) | |
| 373 if (fp_kind == __FP_SSE) { | |
| 374 #endif | |
| 375 fxsave_to_fpregset(&sse_initial, fp); | |
| 376 fp->fp_reg_set.fpchip_state.xstatus = | |
| 377 fpu->fpu_regs.kfpu_xstatus; | |
| 378 #if !defined(__amd64) | |
| 379 } else | |
| 380 bcopy(&x87_initial, fp, sizeof (x87_initial)); | |
| 381 #endif | |
| 382 fp->fp_reg_set.fpchip_state.status = fpu->fpu_regs.kfpu_status; | |
| 383 } | |
| 384 kpreempt_enable(); | |
| 385 } | |
| 386 | |
| 387 #if defined(_SYSCALL32_IMPL) | |
| 388 | |
| 389 /* | |
| 390 * Set floating-point registers from an fpregset32_t. | |
| 391 */ | |
| 392 void | |
| 393 setfpregs32(klwp_t *lwp, fpregset32_t *fp) | |
| 394 { | |
| 395 fpregset_t fpregs; | |
| 396 | |
| 397 fpregset_32ton(fp, &fpregs); | |
| 398 setfpregs(lwp, &fpregs); | |
| 399 } | |
| 400 | |
| 401 /* | |
| 402 * Get floating-point registers into an fpregset32_t. | |
| 403 */ | |
| 404 void | |
| 405 getfpregs32(klwp_t *lwp, fpregset32_t *fp) | |
| 406 { | |
| 407 fpregset_t fpregs; | |
| 408 | |
| 409 getfpregs(lwp, &fpregs); | |
| 410 fpregset_nto32(&fpregs, fp); | |
| 411 } | |
| 412 | |
| 413 #endif /* _SYSCALL32_IMPL */ | |
| 414 | |
| 415 /* | |
| 416 * Return the general registers | |
| 417 */ | |
| 418 void | |
| 419 getgregs(klwp_t *lwp, gregset_t grp) | |
| 420 { | |
| 421 struct regs *rp = lwptoregs(lwp); | |
| 422 #if defined(__amd64) | |
| 423 struct pcb *pcb = &lwp->lwp_pcb; | |
| 424 int thisthread = lwptot(lwp) == curthread; | |
| 425 | |
| 426 grp[REG_RDI] = rp->r_rdi; | |
| 427 grp[REG_RSI] = rp->r_rsi; | |
| 428 grp[REG_RDX] = rp->r_rdx; | |
| 429 grp[REG_RCX] = rp->r_rcx; | |
| 430 grp[REG_R8] = rp->r_r8; | |
| 431 grp[REG_R9] = rp->r_r9; | |
| 432 grp[REG_RAX] = rp->r_rax; | |
| 433 grp[REG_RBX] = rp->r_rbx; | |
| 434 grp[REG_RBP] = rp->r_rbp; | |
| 435 grp[REG_R10] = rp->r_r10; | |
| 436 grp[REG_R11] = rp->r_r11; | |
| 437 grp[REG_R12] = rp->r_r12; | |
| 438 grp[REG_R13] = rp->r_r13; | |
| 439 grp[REG_R14] = rp->r_r14; | |
| 440 grp[REG_R15] = rp->r_r15; | |
| 441 grp[REG_FSBASE] = pcb->pcb_fsbase; | |
| 442 grp[REG_GSBASE] = pcb->pcb_gsbase; | |
| 443 if (thisthread) | |
| 444 kpreempt_disable(); | |
|
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8cf697a3acff
6493689 Jvm crash: curthread set by kernel incorrect
sudheer
parents:
3446
diff
changeset
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445 if (pcb->pcb_rupdate == 1) { |
| 0 | 446 grp[REG_DS] = pcb->pcb_ds; |
| 447 grp[REG_ES] = pcb->pcb_es; | |
| 448 grp[REG_FS] = pcb->pcb_fs; | |
| 449 grp[REG_GS] = pcb->pcb_gs; | |
| 450 } else { | |
| 451 grp[REG_DS] = rp->r_ds; | |
| 452 grp[REG_ES] = rp->r_es; | |
| 453 grp[REG_FS] = rp->r_fs; | |
| 454 grp[REG_GS] = rp->r_gs; | |
| 455 } | |
| 456 if (thisthread) | |
| 457 kpreempt_enable(); | |
| 458 grp[REG_TRAPNO] = rp->r_trapno; | |
| 459 grp[REG_ERR] = rp->r_err; | |
| 460 grp[REG_RIP] = rp->r_rip; | |
| 461 grp[REG_CS] = rp->r_cs; | |
| 462 grp[REG_SS] = rp->r_ss; | |
| 463 grp[REG_RFL] = rp->r_rfl; | |
| 464 grp[REG_RSP] = rp->r_rsp; | |
| 465 #else | |
| 466 bcopy(&rp->r_gs, grp, sizeof (gregset_t)); | |
| 467 #endif | |
| 468 } | |
| 469 | |
| 470 #if defined(_SYSCALL32_IMPL) | |
| 471 | |
| 472 void | |
| 473 getgregs32(klwp_t *lwp, gregset32_t grp) | |
| 474 { | |
| 475 struct regs *rp = lwptoregs(lwp); | |
| 476 struct pcb *pcb = &lwp->lwp_pcb; | |
| 477 int thisthread = lwptot(lwp) == curthread; | |
| 478 | |
| 479 if (thisthread) | |
| 480 kpreempt_disable(); | |
|
4503
8cf697a3acff
6493689 Jvm crash: curthread set by kernel incorrect
sudheer
parents:
3446
diff
changeset
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481 if (pcb->pcb_rupdate == 1) { |
| 0 | 482 grp[GS] = (uint16_t)pcb->pcb_gs; |
| 483 grp[FS] = (uint16_t)pcb->pcb_fs; | |
| 484 grp[DS] = (uint16_t)pcb->pcb_ds; | |
| 485 grp[ES] = (uint16_t)pcb->pcb_es; | |
| 486 } else { | |
| 487 grp[GS] = (uint16_t)rp->r_gs; | |
| 488 grp[FS] = (uint16_t)rp->r_fs; | |
| 489 grp[DS] = (uint16_t)rp->r_ds; | |
| 490 grp[ES] = (uint16_t)rp->r_es; | |
| 491 } | |
| 492 if (thisthread) | |
| 493 kpreempt_enable(); | |
| 494 grp[EDI] = (greg32_t)rp->r_rdi; | |
| 495 grp[ESI] = (greg32_t)rp->r_rsi; | |
| 496 grp[EBP] = (greg32_t)rp->r_rbp; | |
| 497 grp[ESP] = 0; | |
| 498 grp[EBX] = (greg32_t)rp->r_rbx; | |
| 499 grp[EDX] = (greg32_t)rp->r_rdx; | |
| 500 grp[ECX] = (greg32_t)rp->r_rcx; | |
| 501 grp[EAX] = (greg32_t)rp->r_rax; | |
| 502 grp[TRAPNO] = (greg32_t)rp->r_trapno; | |
| 503 grp[ERR] = (greg32_t)rp->r_err; | |
| 504 grp[EIP] = (greg32_t)rp->r_rip; | |
| 505 grp[CS] = (uint16_t)rp->r_cs; | |
| 506 grp[EFL] = (greg32_t)rp->r_rfl; | |
| 507 grp[UESP] = (greg32_t)rp->r_rsp; | |
| 508 grp[SS] = (uint16_t)rp->r_ss; | |
| 509 } | |
| 510 | |
| 511 void | |
| 512 ucontext_32ton(const ucontext32_t *src, ucontext_t *dst) | |
| 513 { | |
| 514 mcontext_t *dmc = &dst->uc_mcontext; | |
| 515 const mcontext32_t *smc = &src->uc_mcontext; | |
| 516 | |
| 517 bzero(dst, sizeof (*dst)); | |
| 518 dst->uc_flags = src->uc_flags; | |
| 519 dst->uc_link = (ucontext_t *)(uintptr_t)src->uc_link; | |
| 520 | |
| 521 bcopy(&src->uc_sigmask, &dst->uc_sigmask, sizeof (dst->uc_sigmask)); | |
| 522 | |
| 523 dst->uc_stack.ss_sp = (void *)(uintptr_t)src->uc_stack.ss_sp; | |
| 524 dst->uc_stack.ss_size = (size_t)src->uc_stack.ss_size; | |
| 525 dst->uc_stack.ss_flags = src->uc_stack.ss_flags; | |
| 526 | |
| 527 dmc->gregs[REG_GS] = (greg_t)(uint32_t)smc->gregs[GS]; | |
| 528 dmc->gregs[REG_FS] = (greg_t)(uint32_t)smc->gregs[FS]; | |
| 529 dmc->gregs[REG_ES] = (greg_t)(uint32_t)smc->gregs[ES]; | |
| 530 dmc->gregs[REG_DS] = (greg_t)(uint32_t)smc->gregs[DS]; | |
| 531 dmc->gregs[REG_RDI] = (greg_t)(uint32_t)smc->gregs[EDI]; | |
| 532 dmc->gregs[REG_RSI] = (greg_t)(uint32_t)smc->gregs[ESI]; | |
| 533 dmc->gregs[REG_RBP] = (greg_t)(uint32_t)smc->gregs[EBP]; | |
| 534 dmc->gregs[REG_RBX] = (greg_t)(uint32_t)smc->gregs[EBX]; | |
| 535 dmc->gregs[REG_RDX] = (greg_t)(uint32_t)smc->gregs[EDX]; | |
| 536 dmc->gregs[REG_RCX] = (greg_t)(uint32_t)smc->gregs[ECX]; | |
| 537 dmc->gregs[REG_RAX] = (greg_t)(uint32_t)smc->gregs[EAX]; | |
| 538 dmc->gregs[REG_TRAPNO] = (greg_t)(uint32_t)smc->gregs[TRAPNO]; | |
| 539 dmc->gregs[REG_ERR] = (greg_t)(uint32_t)smc->gregs[ERR]; | |
| 540 dmc->gregs[REG_RIP] = (greg_t)(uint32_t)smc->gregs[EIP]; | |
| 541 dmc->gregs[REG_CS] = (greg_t)(uint32_t)smc->gregs[CS]; | |
| 542 dmc->gregs[REG_RFL] = (greg_t)(uint32_t)smc->gregs[EFL]; | |
| 543 dmc->gregs[REG_RSP] = (greg_t)(uint32_t)smc->gregs[UESP]; | |
| 544 dmc->gregs[REG_SS] = (greg_t)(uint32_t)smc->gregs[SS]; | |
| 545 | |
| 546 /* | |
| 547 * A valid fpregs is only copied in if uc.uc_flags has UC_FPU set | |
| 548 * otherwise there is no guarantee that anything in fpregs is valid. | |
| 549 */ | |
| 550 if (src->uc_flags & UC_FPU) | |
| 551 fpregset_32ton(&src->uc_mcontext.fpregs, | |
| 552 &dst->uc_mcontext.fpregs); | |
| 553 } | |
| 554 | |
| 555 #endif /* _SYSCALL32_IMPL */ | |
| 556 | |
| 557 /* | |
| 558 * Return the user-level PC. | |
| 559 * If in a system call, return the address of the syscall trap. | |
| 560 */ | |
| 561 greg_t | |
| 562 getuserpc() | |
| 563 { | |
| 564 greg_t upc = lwptoregs(ttolwp(curthread))->r_pc; | |
| 565 uint32_t insn; | |
| 566 | |
| 567 if (curthread->t_sysnum == 0) | |
| 568 return (upc); | |
| 569 | |
| 570 /* | |
| 571 * We might've gotten here from sysenter (0xf 0x34), | |
| 572 * syscall (0xf 0x5) or lcall (0x9a 0 0 0 0 0x27 0). | |
| 573 * | |
| 574 * Go peek at the binary to figure it out.. | |
| 575 */ | |
| 576 if (fuword32((void *)(upc - 2), &insn) != -1 && | |
| 577 (insn & 0xffff) == 0x340f || (insn & 0xffff) == 0x050f) | |
| 578 return (upc - 2); | |
| 579 return (upc - 7); | |
| 580 } | |
| 581 | |
| 582 /* | |
| 583 * Protect segment registers from non-user privilege levels and GDT selectors | |
| 584 * other than USER_CS, USER_DS and lwp FS and GS values. If the segment | |
| 585 * selector is non-null and not USER_CS/USER_DS, we make sure that the | |
| 586 * TI bit is set to point into the LDT and that the RPL is set to 3. | |
| 587 * | |
| 588 * Since struct regs stores each 16-bit segment register as a 32-bit greg_t, we | |
| 589 * also explicitly zero the top 16 bits since they may be coming from the | |
| 590 * user's address space via setcontext(2) or /proc. | |
| 591 */ | |
| 592 | |
| 593 /*ARGSUSED*/ | |
| 594 static greg_t | |
| 595 fix_segreg(greg_t sr, model_t datamodel) | |
| 596 { | |
|
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597 kthread_t *t = curthread; |
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598 |
| 0 | 599 switch (sr &= 0xffff) { |
| 600 #if defined(__amd64) | |
| 601 /* | |
| 602 * If lwp attempts to switch data model then force their | |
| 603 * code selector to be null selector. | |
| 604 */ | |
| 605 case U32CS_SEL: | |
| 606 if (datamodel == DATAMODEL_NATIVE) | |
| 607 return (0); | |
| 608 else | |
| 609 return (sr); | |
| 610 | |
| 611 case UCS_SEL: | |
| 612 if (datamodel == DATAMODEL_ILP32) | |
| 613 return (0); | |
| 614 #elif defined(__i386) | |
| 615 case UCS_SEL: | |
| 616 #endif | |
| 617 /*FALLTHROUGH*/ | |
| 618 case UDS_SEL: | |
| 619 case LWPFS_SEL: | |
| 620 case LWPGS_SEL: | |
| 621 case 0: | |
| 622 return (sr); | |
| 623 default: | |
| 624 break; | |
| 625 } | |
| 626 | |
| 627 /* | |
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628 * Allow this process's brand to do any necessary segment register |
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629 * manipulation. |
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630 */ |
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631 if (PROC_IS_BRANDED(t->t_procp) && BRMOP(t->t_procp)->b_fixsegreg) |
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632 return (BRMOP(t->t_procp)->b_fixsegreg(sr, datamodel)); |
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633 |
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634 /* |
| 1217 | 635 * Force it into the LDT in ring 3 for 32-bit processes, which by |
| 636 * default do not have an LDT, so that any attempt to use an invalid | |
| 637 * selector will reference the (non-existant) LDT, and cause a #gp fault | |
| 638 * for the process. | |
| 639 * | |
| 0 | 640 * 64-bit processes get the null gdt selector since they |
| 641 * are not allowed to have a private LDT. | |
| 642 */ | |
| 643 #if defined(__amd64) | |
| 644 return (datamodel == DATAMODEL_ILP32 ? (sr | SEL_TI_LDT | SEL_UPL) : 0); | |
| 645 #elif defined(__i386) | |
| 646 return (sr | SEL_TI_LDT | SEL_UPL); | |
| 647 #endif | |
| 648 } | |
| 649 | |
| 650 /* | |
| 651 * Set general registers. | |
| 652 */ | |
| 653 void | |
| 654 setgregs(klwp_t *lwp, gregset_t grp) | |
| 655 { | |
| 656 struct regs *rp = lwptoregs(lwp); | |
| 657 model_t datamodel = lwp_getdatamodel(lwp); | |
| 658 | |
| 659 #if defined(__amd64) | |
| 660 struct pcb *pcb = &lwp->lwp_pcb; | |
| 661 int thisthread = lwptot(lwp) == curthread; | |
| 662 | |
| 663 if (datamodel == DATAMODEL_NATIVE) { | |
| 664 | |
| 665 if (thisthread) | |
| 666 (void) save_syscall_args(); /* copy the args */ | |
| 667 | |
| 668 rp->r_rdi = grp[REG_RDI]; | |
| 669 rp->r_rsi = grp[REG_RSI]; | |
| 670 rp->r_rdx = grp[REG_RDX]; | |
| 671 rp->r_rcx = grp[REG_RCX]; | |
| 672 rp->r_r8 = grp[REG_R8]; | |
| 673 rp->r_r9 = grp[REG_R9]; | |
| 674 rp->r_rax = grp[REG_RAX]; | |
| 675 rp->r_rbx = grp[REG_RBX]; | |
| 676 rp->r_rbp = grp[REG_RBP]; | |
| 677 rp->r_r10 = grp[REG_R10]; | |
| 678 rp->r_r11 = grp[REG_R11]; | |
| 679 rp->r_r12 = grp[REG_R12]; | |
| 680 rp->r_r13 = grp[REG_R13]; | |
| 681 rp->r_r14 = grp[REG_R14]; | |
| 682 rp->r_r15 = grp[REG_R15]; | |
| 683 rp->r_trapno = grp[REG_TRAPNO]; | |
| 684 rp->r_err = grp[REG_ERR]; | |
| 685 rp->r_rip = grp[REG_RIP]; | |
| 686 /* | |
| 687 * Setting %cs or %ss to anything else is quietly but | |
| 688 * quite definitely forbidden! | |
| 689 */ | |
| 690 rp->r_cs = UCS_SEL; | |
| 691 rp->r_ss = UDS_SEL; | |
| 692 rp->r_rsp = grp[REG_RSP]; | |
| 693 | |
| 694 if (thisthread) | |
| 695 kpreempt_disable(); | |
| 696 | |
| 697 pcb->pcb_ds = UDS_SEL; | |
| 698 pcb->pcb_es = UDS_SEL; | |
| 699 | |
| 700 /* | |
| 701 * 64-bit processes -are- allowed to set their fsbase/gsbase | |
| 702 * values directly, but only if they're using the segment | |
| 703 * selectors that allow that semantic. | |
| 704 * | |
| 705 * (32-bit processes must use lwp_set_private().) | |
| 706 */ | |
| 707 pcb->pcb_fsbase = grp[REG_FSBASE]; | |
| 708 pcb->pcb_gsbase = grp[REG_GSBASE]; | |
| 709 pcb->pcb_fs = fix_segreg(grp[REG_FS], datamodel); | |
| 710 pcb->pcb_gs = fix_segreg(grp[REG_GS], datamodel); | |
| 711 | |
| 712 /* | |
| 713 * Ensure that we go out via update_sregs | |
| 714 */ | |
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715 pcb->pcb_rupdate = 1; |
| 0 | 716 lwptot(lwp)->t_post_sys = 1; |
| 717 if (thisthread) | |
| 718 kpreempt_enable(); | |
| 719 #if defined(_SYSCALL32_IMPL) | |
| 720 } else { | |
| 721 rp->r_rdi = (uint32_t)grp[REG_RDI]; | |
| 722 rp->r_rsi = (uint32_t)grp[REG_RSI]; | |
| 723 rp->r_rdx = (uint32_t)grp[REG_RDX]; | |
| 724 rp->r_rcx = (uint32_t)grp[REG_RCX]; | |
| 725 rp->r_rax = (uint32_t)grp[REG_RAX]; | |
| 726 rp->r_rbx = (uint32_t)grp[REG_RBX]; | |
| 727 rp->r_rbp = (uint32_t)grp[REG_RBP]; | |
| 728 rp->r_trapno = (uint32_t)grp[REG_TRAPNO]; | |
| 729 rp->r_err = (uint32_t)grp[REG_ERR]; | |
| 730 rp->r_rip = (uint32_t)grp[REG_RIP]; | |
| 731 | |
| 732 /* | |
| 733 * The kernel uses %cs to determine if it is dealing with | |
| 734 * another part of the kernel or with a userland application. | |
| 735 * Specifically, it tests the privilege bits. For this reason, | |
| 736 * we must prevent user apps from ending up with a NULL selector | |
| 737 * in %cs. Instead, we'll use index 0 into the GDT but with the | |
| 738 * privilege bits set to usermode. | |
| 739 */ | |
| 740 rp->r_cs = fix_segreg(grp[REG_CS], datamodel) | SEL_UPL; | |
| 741 rp->r_ss = fix_segreg(grp[REG_DS], datamodel); | |
| 742 | |
| 743 rp->r_rsp = (uint32_t)grp[REG_RSP]; | |
| 744 | |
| 745 if (thisthread) | |
| 746 kpreempt_disable(); | |
| 747 | |
| 748 pcb->pcb_ds = fix_segreg(grp[REG_DS], datamodel); | |
| 749 pcb->pcb_es = fix_segreg(grp[REG_ES], datamodel); | |
| 750 | |
| 751 /* | |
| 752 * (See fsbase/gsbase commentary above) | |
| 753 */ | |
| 754 pcb->pcb_fs = fix_segreg(grp[REG_FS], datamodel); | |
| 755 pcb->pcb_gs = fix_segreg(grp[REG_GS], datamodel); | |
| 756 | |
| 757 /* | |
| 758 * Ensure that we go out via update_sregs | |
| 759 */ | |
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760 pcb->pcb_rupdate = 1; |
| 0 | 761 lwptot(lwp)->t_post_sys = 1; |
| 762 if (thisthread) | |
| 763 kpreempt_enable(); | |
| 764 #endif | |
| 765 } | |
| 766 | |
| 767 /* | |
| 768 * Only certain bits of the flags register can be modified. | |
| 769 */ | |
| 770 rp->r_rfl = (rp->r_rfl & ~PSL_USERMASK) | | |
| 771 (grp[REG_RFL] & PSL_USERMASK); | |
| 772 | |
| 773 #elif defined(__i386) | |
| 774 | |
| 775 /* | |
| 776 * Only certain bits of the flags register can be modified. | |
| 777 */ | |
| 778 grp[EFL] = (rp->r_efl & ~PSL_USERMASK) | (grp[EFL] & PSL_USERMASK); | |
| 779 | |
| 780 /* | |
| 781 * Copy saved registers from user stack. | |
| 782 */ | |
| 783 bcopy(grp, &rp->r_gs, sizeof (gregset_t)); | |
| 784 | |
| 785 rp->r_cs = fix_segreg(rp->r_cs, datamodel); | |
| 786 rp->r_ss = fix_segreg(rp->r_ss, datamodel); | |
| 787 rp->r_ds = fix_segreg(rp->r_ds, datamodel); | |
| 788 rp->r_es = fix_segreg(rp->r_es, datamodel); | |
| 789 rp->r_fs = fix_segreg(rp->r_fs, datamodel); | |
| 790 rp->r_gs = fix_segreg(rp->r_gs, datamodel); | |
| 791 | |
| 792 #endif /* __i386 */ | |
| 793 } | |
| 794 | |
| 795 /* | |
| 796 * Determine whether eip is likely to have an interrupt frame | |
| 797 * on the stack. We do this by comparing the address to the | |
| 798 * range of addresses spanned by several well-known routines. | |
| 799 */ | |
| 800 extern void _interrupt(); | |
| 801 extern void _allsyscalls(); | |
| 802 extern void _cmntrap(); | |
| 803 extern void fakesoftint(); | |
| 804 | |
| 805 extern size_t _interrupt_size; | |
| 806 extern size_t _allsyscalls_size; | |
| 807 extern size_t _cmntrap_size; | |
| 808 extern size_t _fakesoftint_size; | |
| 809 | |
| 810 /* | |
| 811 * Get a pc-only stacktrace. Used for kmem_alloc() buffer ownership tracking. | |
| 812 * Returns MIN(current stack depth, pcstack_limit). | |
| 813 */ | |
| 814 int | |
| 815 getpcstack(pc_t *pcstack, int pcstack_limit) | |
| 816 { | |
| 817 struct frame *fp = (struct frame *)getfp(); | |
| 818 struct frame *nextfp, *minfp, *stacktop; | |
| 819 int depth = 0; | |
| 820 int on_intr; | |
| 821 uintptr_t pc; | |
| 822 | |
| 823 if ((on_intr = CPU_ON_INTR(CPU)) != 0) | |
| 824 stacktop = (struct frame *)(CPU->cpu_intr_stack + SA(MINFRAME)); | |
| 825 else | |
| 826 stacktop = (struct frame *)curthread->t_stk; | |
| 827 minfp = fp; | |
| 828 | |
| 829 pc = ((struct regs *)fp)->r_pc; | |
| 830 | |
| 831 while (depth < pcstack_limit) { | |
| 832 nextfp = (struct frame *)fp->fr_savfp; | |
| 833 pc = fp->fr_savpc; | |
| 834 if (nextfp <= minfp || nextfp >= stacktop) { | |
| 835 if (on_intr) { | |
| 836 /* | |
| 837 * Hop from interrupt stack to thread stack. | |
| 838 */ | |
| 839 stacktop = (struct frame *)curthread->t_stk; | |
| 840 minfp = (struct frame *)curthread->t_stkbase; | |
| 841 on_intr = 0; | |
| 842 continue; | |
| 843 } | |
| 844 break; | |
| 845 } | |
| 846 pcstack[depth++] = (pc_t)pc; | |
| 847 fp = nextfp; | |
| 848 minfp = fp; | |
| 849 } | |
| 850 return (depth); | |
| 851 } | |
| 852 | |
| 853 /* | |
| 854 * The following ELF header fields are defined as processor-specific | |
| 855 * in the V8 ABI: | |
| 856 * | |
| 857 * e_ident[EI_DATA] encoding of the processor-specific | |
| 858 * data in the object file | |
| 859 * e_machine processor identification | |
| 860 * e_flags processor-specific flags associated | |
| 861 * with the file | |
| 862 */ | |
| 863 | |
| 864 /* | |
| 865 * The value of at_flags reflects a platform's cpu module support. | |
| 866 * at_flags is used to check for allowing a binary to execute and | |
| 867 * is passed as the value of the AT_FLAGS auxiliary vector. | |
| 868 */ | |
| 869 int at_flags = 0; | |
| 870 | |
| 871 /* | |
| 872 * Check the processor-specific fields of an ELF header. | |
| 873 * | |
| 874 * returns 1 if the fields are valid, 0 otherwise | |
| 875 */ | |
| 876 /*ARGSUSED2*/ | |
| 877 int | |
| 878 elfheadcheck( | |
| 879 unsigned char e_data, | |
| 880 Elf32_Half e_machine, | |
| 881 Elf32_Word e_flags) | |
| 882 { | |
| 883 if (e_data != ELFDATA2LSB) | |
| 884 return (0); | |
| 885 #if defined(__amd64) | |
| 886 if (e_machine == EM_AMD64) | |
| 887 return (1); | |
| 888 #endif | |
| 889 return (e_machine == EM_386); | |
| 890 } | |
| 891 | |
| 892 uint_t auxv_hwcap_include = 0; /* patch to enable unrecognized features */ | |
| 893 uint_t auxv_hwcap_exclude = 0; /* patch for broken cpus, debugging */ | |
| 894 #if defined(_SYSCALL32_IMPL) | |
| 895 uint_t auxv_hwcap32_include = 0; /* ditto for 32-bit apps */ | |
| 896 uint_t auxv_hwcap32_exclude = 0; /* ditto for 32-bit apps */ | |
| 897 #endif | |
| 898 | |
| 899 /* | |
| 900 * Gather information about the processor and place it into auxv_hwcap | |
| 901 * so that it can be exported to the linker via the aux vector. | |
| 902 * | |
| 903 * We use this seemingly complicated mechanism so that we can ensure | |
| 904 * that /etc/system can be used to override what the system can or | |
| 905 * cannot discover for itself. | |
| 906 */ | |
| 907 void | |
| 908 bind_hwcap(void) | |
| 909 { | |
| 910 uint_t cpu_hwcap_flags = cpuid_pass4(NULL); | |
| 911 | |
| 912 auxv_hwcap = (auxv_hwcap_include | cpu_hwcap_flags) & | |
| 913 ~auxv_hwcap_exclude; | |
| 914 | |
| 915 #if defined(__amd64) | |
| 916 /* | |
| 917 * On AMD processors, sysenter just doesn't work at all | |
| 918 * when the kernel is in long mode. On IA-32e processors | |
| 919 * it does, but there's no real point in all the alternate | |
| 920 * mechanism when syscall works on both. | |
| 921 * | |
| 922 * Besides, the kernel's sysenter handler is expecting a | |
| 923 * 32-bit lwp ... | |
| 924 */ | |
| 925 auxv_hwcap &= ~AV_386_SEP; | |
| 3446 | 926 #else |
| 927 /* | |
| 928 * 32-bit processes can -always- use the lahf/sahf instructions | |
| 929 */ | |
| 930 auxv_hwcap |= AV_386_AHF; | |
| 0 | 931 #endif |
| 932 | |
| 933 if (auxv_hwcap_include || auxv_hwcap_exclude) | |
| 934 cmn_err(CE_CONT, "?user ABI extensions: %b\n", | |
| 935 auxv_hwcap, FMT_AV_386); | |
| 936 | |
| 937 #if defined(_SYSCALL32_IMPL) | |
| 938 auxv_hwcap32 = (auxv_hwcap32_include | cpu_hwcap_flags) & | |
| 939 ~auxv_hwcap32_exclude; | |
| 940 | |
| 941 #if defined(__amd64) | |
| 942 /* | |
| 943 * If this is an amd64 architecture machine from Intel, then | |
| 944 * syscall -doesn't- work in compatibility mode, only sysenter does. | |
| 945 * | |
| 946 * Sigh. | |
| 947 */ | |
| 948 if (!cpuid_syscall32_insn(NULL)) | |
| 949 auxv_hwcap32 &= ~AV_386_AMD_SYSC; | |
| 3446 | 950 |
| 951 /* | |
| 952 * 32-bit processes can -always- use the lahf/sahf instructions | |
| 953 */ | |
| 954 auxv_hwcap32 |= AV_386_AHF; | |
| 0 | 955 #endif |
| 956 | |
| 957 if (auxv_hwcap32_include || auxv_hwcap32_exclude) | |
| 958 cmn_err(CE_CONT, "?32-bit user ABI extensions: %b\n", | |
| 959 auxv_hwcap32, FMT_AV_386); | |
| 960 #endif | |
| 961 } | |
| 962 | |
| 963 /* | |
| 964 * sync_icache() - this is called | |
| 965 * in proc/fs/prusrio.c. x86 has an unified cache and therefore | |
| 966 * this is a nop. | |
| 967 */ | |
| 968 /* ARGSUSED */ | |
| 969 void | |
| 970 sync_icache(caddr_t addr, uint_t len) | |
| 971 { | |
| 972 /* Do nothing for now */ | |
| 973 } | |
| 974 | |
| 975 /*ARGSUSED*/ | |
| 976 void | |
| 977 sync_data_memory(caddr_t va, size_t len) | |
| 978 { | |
| 979 /* Not implemented for this platform */ | |
| 980 } | |
| 981 | |
| 982 int | |
| 983 __ipltospl(int ipl) | |
| 984 { | |
| 985 return (ipltospl(ipl)); | |
| 986 } | |
| 987 | |
| 988 /* | |
| 989 * The panic code invokes panic_saveregs() to record the contents of a | |
| 990 * regs structure into the specified panic_data structure for debuggers. | |
| 991 */ | |
| 992 void | |
| 993 panic_saveregs(panic_data_t *pdp, struct regs *rp) | |
| 994 { | |
| 995 panic_nv_t *pnv = PANICNVGET(pdp); | |
| 996 | |
| 997 struct cregs creg; | |
| 998 | |
| 999 getcregs(&creg); | |
| 1000 | |
| 1001 #if defined(__amd64) | |
| 1002 PANICNVADD(pnv, "rdi", rp->r_rdi); | |
| 1003 PANICNVADD(pnv, "rsi", rp->r_rsi); | |
| 1004 PANICNVADD(pnv, "rdx", rp->r_rdx); | |
| 1005 PANICNVADD(pnv, "rcx", rp->r_rcx); | |
| 1006 PANICNVADD(pnv, "r8", rp->r_r8); | |
| 1007 PANICNVADD(pnv, "r9", rp->r_r9); | |
| 1008 PANICNVADD(pnv, "rax", rp->r_rax); | |
| 1009 PANICNVADD(pnv, "rbx", rp->r_rbx); | |
| 1010 PANICNVADD(pnv, "rbp", rp->r_rbp); | |
| 1011 PANICNVADD(pnv, "r10", rp->r_r10); | |
| 1012 PANICNVADD(pnv, "r10", rp->r_r10); | |
| 1013 PANICNVADD(pnv, "r11", rp->r_r11); | |
| 1014 PANICNVADD(pnv, "r12", rp->r_r12); | |
| 1015 PANICNVADD(pnv, "r13", rp->r_r13); | |
| 1016 PANICNVADD(pnv, "r14", rp->r_r14); | |
| 1017 PANICNVADD(pnv, "r15", rp->r_r15); | |
| 3446 | 1018 PANICNVADD(pnv, "fsbase", rdmsr(MSR_AMD_FSBASE)); |
| 1019 PANICNVADD(pnv, "gsbase", rdmsr(MSR_AMD_GSBASE)); | |
| 0 | 1020 PANICNVADD(pnv, "ds", rp->r_ds); |
| 1021 PANICNVADD(pnv, "es", rp->r_es); | |
| 1022 PANICNVADD(pnv, "fs", rp->r_fs); | |
| 1023 PANICNVADD(pnv, "gs", rp->r_gs); | |
| 1024 PANICNVADD(pnv, "trapno", rp->r_trapno); | |
| 1025 PANICNVADD(pnv, "err", rp->r_err); | |
| 1026 PANICNVADD(pnv, "rip", rp->r_rip); | |
| 1027 PANICNVADD(pnv, "cs", rp->r_cs); | |
| 1028 PANICNVADD(pnv, "rflags", rp->r_rfl); | |
| 1029 PANICNVADD(pnv, "rsp", rp->r_rsp); | |
| 1030 PANICNVADD(pnv, "ss", rp->r_ss); | |
| 1031 PANICNVADD(pnv, "gdt_hi", (uint64_t)(creg.cr_gdt._l[3])); | |
| 1032 PANICNVADD(pnv, "gdt_lo", (uint64_t)(creg.cr_gdt._l[0])); | |
| 1033 PANICNVADD(pnv, "idt_hi", (uint64_t)(creg.cr_idt._l[3])); | |
| 1034 PANICNVADD(pnv, "idt_lo", (uint64_t)(creg.cr_idt._l[0])); | |
| 1035 #elif defined(__i386) | |
| 1036 PANICNVADD(pnv, "gs", (uint32_t)rp->r_gs); | |
| 1037 PANICNVADD(pnv, "fs", (uint32_t)rp->r_fs); | |
| 1038 PANICNVADD(pnv, "es", (uint32_t)rp->r_es); | |
| 1039 PANICNVADD(pnv, "ds", (uint32_t)rp->r_ds); | |
| 1040 PANICNVADD(pnv, "edi", (uint32_t)rp->r_edi); | |
| 1041 PANICNVADD(pnv, "esi", (uint32_t)rp->r_esi); | |
| 1042 PANICNVADD(pnv, "ebp", (uint32_t)rp->r_ebp); | |
| 1043 PANICNVADD(pnv, "esp", (uint32_t)rp->r_esp); | |
| 1044 PANICNVADD(pnv, "ebx", (uint32_t)rp->r_ebx); | |
| 1045 PANICNVADD(pnv, "edx", (uint32_t)rp->r_edx); | |
| 1046 PANICNVADD(pnv, "ecx", (uint32_t)rp->r_ecx); | |
| 1047 PANICNVADD(pnv, "eax", (uint32_t)rp->r_eax); | |
| 1048 PANICNVADD(pnv, "trapno", (uint32_t)rp->r_trapno); | |
| 1049 PANICNVADD(pnv, "err", (uint32_t)rp->r_err); | |
| 1050 PANICNVADD(pnv, "eip", (uint32_t)rp->r_eip); | |
| 1051 PANICNVADD(pnv, "cs", (uint32_t)rp->r_cs); | |
| 1052 PANICNVADD(pnv, "eflags", (uint32_t)rp->r_efl); | |
| 1053 PANICNVADD(pnv, "uesp", (uint32_t)rp->r_uesp); | |
| 1054 PANICNVADD(pnv, "ss", (uint32_t)rp->r_ss); | |
| 1055 PANICNVADD(pnv, "gdt", creg.cr_gdt); | |
| 1056 PANICNVADD(pnv, "idt", creg.cr_idt); | |
| 1057 #endif /* __i386 */ | |
| 1058 | |
| 1059 PANICNVADD(pnv, "ldt", creg.cr_ldt); | |
| 1060 PANICNVADD(pnv, "task", creg.cr_task); | |
| 1061 PANICNVADD(pnv, "cr0", creg.cr_cr0); | |
| 1062 PANICNVADD(pnv, "cr2", creg.cr_cr2); | |
| 1063 PANICNVADD(pnv, "cr3", creg.cr_cr3); | |
| 1064 if (creg.cr_cr4) | |
| 1065 PANICNVADD(pnv, "cr4", creg.cr_cr4); | |
| 1066 | |
| 1067 PANICNVSET(pdp, pnv); | |
| 1068 } | |
| 1069 | |
| 1070 #define TR_ARG_MAX 6 /* Max args to print, same as SPARC */ | |
| 1071 | |
| 1072 #if !defined(__amd64) | |
| 1073 | |
| 1074 /* | |
| 1075 * Given a return address (%eip), determine the likely number of arguments | |
| 1076 * that were pushed on the stack prior to its execution. We do this by | |
| 1077 * expecting that a typical call sequence consists of pushing arguments on | |
| 1078 * the stack, executing a call instruction, and then performing an add | |
| 1079 * on %esp to restore it to the value prior to pushing the arguments for | |
| 1080 * the call. We attempt to detect such an add, and divide the addend | |
| 1081 * by the size of a word to determine the number of pushed arguments. | |
| 1082 * | |
| 1083 * If we do not find such an add, we punt and return TR_ARG_MAX. It is not | |
| 1084 * possible to reliably determine if a function took no arguments (i.e. was | |
| 1085 * void) because assembler routines do not reliably perform an add on %esp | |
| 1086 * immediately upon returning (eg. _sys_call()), so returning TR_ARG_MAX is | |
| 1087 * safer than returning 0. | |
| 1088 */ | |
| 1089 static ulong_t | |
| 1090 argcount(uintptr_t eip) | |
| 1091 { | |
| 1092 const uint8_t *ins = (const uint8_t *)eip; | |
| 1093 ulong_t n; | |
| 1094 | |
| 1095 enum { | |
| 1096 M_MODRM_ESP = 0xc4, /* Mod/RM byte indicates %esp */ | |
| 1097 M_ADD_IMM32 = 0x81, /* ADD imm32 to r/m32 */ | |
| 1098 M_ADD_IMM8 = 0x83 /* ADD imm8 to r/m32 */ | |
| 1099 }; | |
| 1100 | |
| 1101 if (eip < KERNELBASE || ins[1] != M_MODRM_ESP) | |
| 1102 return (TR_ARG_MAX); | |
| 1103 | |
| 1104 switch (ins[0]) { | |
| 1105 case M_ADD_IMM32: | |
| 1106 n = ins[2] + (ins[3] << 8) + (ins[4] << 16) + (ins[5] << 24); | |
| 1107 break; | |
| 1108 | |
| 1109 case M_ADD_IMM8: | |
| 1110 n = ins[2]; | |
| 1111 break; | |
| 1112 | |
| 1113 default: | |
| 1114 return (TR_ARG_MAX); | |
| 1115 } | |
| 1116 | |
| 1117 n /= sizeof (long); | |
| 1118 return (MIN(n, TR_ARG_MAX)); | |
| 1119 } | |
| 1120 | |
| 1121 #endif /* !__amd64 */ | |
| 1122 | |
| 1123 /* | |
| 1124 * Print a stack backtrace using the specified frame pointer. We delay two | |
| 1125 * seconds before continuing, unless this is the panic traceback. Note | |
| 1126 * that the frame for the starting stack pointer value is omitted because | |
| 1127 * the corresponding %eip is not known. | |
| 1128 */ | |
| 1129 #if defined(__amd64) | |
| 1130 | |
| 1131 void | |
| 1132 traceback(caddr_t fpreg) | |
| 1133 { | |
| 1134 struct frame *fp = (struct frame *)fpreg; | |
| 1135 struct frame *nextfp; | |
| 1136 uintptr_t pc, nextpc; | |
| 1137 ulong_t off; | |
| 1138 char args[TR_ARG_MAX * 2 + 16], *sym; | |
| 1139 | |
| 1140 if (!panicstr) | |
| 1141 printf("traceback: %%fp = %p\n", (void *)fp); | |
| 1142 | |
| 1143 if ((uintptr_t)fp < KERNELBASE) | |
| 1144 goto out; | |
| 1145 | |
| 1146 pc = fp->fr_savpc; | |
| 1147 fp = (struct frame *)fp->fr_savfp; | |
| 1148 | |
| 1149 while ((uintptr_t)fp >= KERNELBASE) { | |
| 1150 /* | |
| 1151 * XX64 Until port is complete tolerate 8-byte aligned | |
| 1152 * frame pointers but flag with a warning so they can | |
| 1153 * be fixed. | |
| 1154 */ | |
| 1155 if (((uintptr_t)fp & (STACK_ALIGN - 1)) != 0) { | |
| 1156 if (((uintptr_t)fp & (8 - 1)) == 0) { | |
| 1157 printf(" >> warning! 8-byte" | |
| 1158 " aligned %%fp = %p\n", (void *)fp); | |
| 1159 } else { | |
| 1160 printf( | |
| 1161 " >> mis-aligned %%fp = %p\n", (void *)fp); | |
| 1162 break; | |
| 1163 } | |
| 1164 } | |
| 1165 | |
| 1166 args[0] = '\0'; | |
| 1167 nextpc = (uintptr_t)fp->fr_savpc; | |
| 1168 nextfp = (struct frame *)fp->fr_savfp; | |
| 1169 if ((sym = kobj_getsymname(pc, &off)) != NULL) { | |
| 1170 printf("%016lx %s:%s+%lx (%s)\n", (uintptr_t)fp, | |
| 1171 mod_containing_pc((caddr_t)pc), sym, off, args); | |
| 1172 } else { | |
| 1173 printf("%016lx %lx (%s)\n", | |
| 1174 (uintptr_t)fp, pc, args); | |
| 1175 } | |
| 1176 | |
| 1177 pc = nextpc; | |
| 1178 fp = nextfp; | |
| 1179 } | |
| 1180 out: | |
| 1181 if (!panicstr) { | |
| 1182 printf("end of traceback\n"); | |
| 1183 DELAY(2 * MICROSEC); | |
| 1184 } | |
| 1185 } | |
| 1186 | |
| 1187 #elif defined(__i386) | |
| 1188 | |
| 1189 void | |
| 1190 traceback(caddr_t fpreg) | |
| 1191 { | |
| 1192 struct frame *fp = (struct frame *)fpreg; | |
| 1193 struct frame *nextfp, *minfp, *stacktop; | |
| 1194 uintptr_t pc, nextpc; | |
| 1195 | |
| 1196 cpu_t *cpu; | |
| 1197 | |
| 1198 /* | |
| 1199 * args[] holds TR_ARG_MAX hex long args, plus ", " or '\0'. | |
| 1200 */ | |
| 1201 char args[TR_ARG_MAX * 2 + 8], *p; | |
| 1202 | |
| 1203 int on_intr; | |
| 1204 ulong_t off; | |
| 1205 char *sym; | |
| 1206 | |
| 1207 if (!panicstr) | |
| 1208 printf("traceback: %%fp = %p\n", (void *)fp); | |
| 1209 | |
| 1210 /* | |
| 1211 * If we are panicking, all high-level interrupt information in | |
| 1212 * CPU was overwritten. panic_cpu has the correct values. | |
| 1213 */ | |
| 1214 kpreempt_disable(); /* prevent migration */ | |
| 1215 | |
| 1216 cpu = (panicstr && CPU->cpu_id == panic_cpu.cpu_id)? &panic_cpu : CPU; | |
| 1217 | |
| 1218 if ((on_intr = CPU_ON_INTR(cpu)) != 0) | |
| 1219 stacktop = (struct frame *)(cpu->cpu_intr_stack + SA(MINFRAME)); | |
| 1220 else | |
| 1221 stacktop = (struct frame *)curthread->t_stk; | |
| 1222 | |
| 1223 kpreempt_enable(); | |
| 1224 | |
| 1225 if ((uintptr_t)fp < KERNELBASE) | |
| 1226 goto out; | |
| 1227 | |
| 1228 minfp = fp; /* Baseline minimum frame pointer */ | |
| 1229 pc = fp->fr_savpc; | |
| 1230 fp = (struct frame *)fp->fr_savfp; | |
| 1231 | |
| 1232 while ((uintptr_t)fp >= KERNELBASE) { | |
| 1233 ulong_t argc; | |
| 1234 long *argv; | |
| 1235 | |
| 1236 if (fp <= minfp || fp >= stacktop) { | |
| 1237 if (on_intr) { | |
| 1238 /* | |
| 1239 * Hop from interrupt stack to thread stack. | |
| 1240 */ | |
| 1241 stacktop = (struct frame *)curthread->t_stk; | |
| 1242 minfp = (struct frame *)curthread->t_stkbase; | |
| 1243 on_intr = 0; | |
| 1244 continue; | |
| 1245 } | |
| 1246 break; /* we're outside of the expected range */ | |
| 1247 } | |
| 1248 | |
| 1249 if ((uintptr_t)fp & (STACK_ALIGN - 1)) { | |
| 1250 printf(" >> mis-aligned %%fp = %p\n", (void *)fp); | |
| 1251 break; | |
| 1252 } | |
| 1253 | |
| 1254 nextpc = fp->fr_savpc; | |
| 1255 nextfp = (struct frame *)fp->fr_savfp; | |
| 1256 argc = argcount(nextpc); | |
| 1257 argv = (long *)((char *)fp + sizeof (struct frame)); | |
| 1258 | |
| 1259 args[0] = '\0'; | |
| 1260 p = args; | |
| 1261 while (argc-- > 0 && argv < (long *)stacktop) { | |
| 1262 p += snprintf(p, args + sizeof (args) - p, | |
| 1263 "%s%lx", (p == args) ? "" : ", ", *argv++); | |
| 1264 } | |
| 1265 | |
| 1266 if ((sym = kobj_getsymname(pc, &off)) != NULL) { | |
| 1267 printf("%08lx %s:%s+%lx (%s)\n", (uintptr_t)fp, | |
| 1268 mod_containing_pc((caddr_t)pc), sym, off, args); | |
| 1269 } else { | |
| 1270 printf("%08lx %lx (%s)\n", | |
| 1271 (uintptr_t)fp, pc, args); | |
| 1272 } | |
| 1273 | |
| 1274 minfp = fp; | |
| 1275 pc = nextpc; | |
| 1276 fp = nextfp; | |
| 1277 } | |
| 1278 out: | |
| 1279 if (!panicstr) { | |
| 1280 printf("end of traceback\n"); | |
| 1281 DELAY(2 * MICROSEC); | |
| 1282 } | |
| 1283 } | |
| 1284 | |
| 1285 #endif /* __i386 */ | |
| 1286 | |
| 1287 /* | |
| 1288 * Generate a stack backtrace from a saved register set. | |
| 1289 */ | |
| 1290 void | |
| 1291 traceregs(struct regs *rp) | |
| 1292 { | |
| 1293 traceback((caddr_t)rp->r_fp); | |
| 1294 } | |
| 1295 | |
| 1296 void | |
| 1297 exec_set_sp(size_t stksize) | |
| 1298 { | |
| 1299 klwp_t *lwp = ttolwp(curthread); | |
| 1300 | |
| 1301 lwptoregs(lwp)->r_sp = (uintptr_t)curproc->p_usrstack - stksize; | |
| 1302 } | |
| 1303 | |
| 1304 hrtime_t | |
| 1305 gethrtime_waitfree(void) | |
| 1306 { | |
| 1307 return (dtrace_gethrtime()); | |
| 1308 } | |
| 1309 | |
| 1310 hrtime_t | |
| 1311 gethrtime(void) | |
| 1312 { | |
| 1313 return (gethrtimef()); | |
| 1314 } | |
| 1315 | |
| 1316 hrtime_t | |
| 1317 gethrtime_unscaled(void) | |
| 1318 { | |
| 1319 return (gethrtimeunscaledf()); | |
| 1320 } | |
| 1321 | |
| 1322 void | |
| 1323 scalehrtime(hrtime_t *hrt) | |
| 1324 { | |
| 1325 scalehrtimef(hrt); | |
| 1326 } | |
| 1327 | |
| 1328 void | |
| 1329 gethrestime(timespec_t *tp) | |
| 1330 { | |
| 1331 gethrestimef(tp); | |
| 1332 } | |
| 1333 | |
| 1334 #if defined(__amd64) | |
| 1335 /* | |
| 1336 * Part of the implementation of hres_tick(); this routine is | |
| 1337 * easier in C than assembler .. called with the hres_lock held. | |
| 1338 * | |
| 1339 * XX64 Many of these timekeeping variables need to be extern'ed in a header | |
| 1340 */ | |
| 1341 | |
| 1342 #include <sys/time.h> | |
| 1343 #include <sys/machlock.h> | |
| 1344 | |
| 1345 extern int one_sec; | |
| 1346 extern timestruc_t hrestime; | |
| 1347 extern int max_hres_adj; | |
| 1348 | |
| 1349 void | |
| 1350 __adj_hrestime(void) | |
| 1351 { | |
| 1352 long long adj; | |
| 1353 | |
| 1354 if (hrestime_adj == 0) | |
| 1355 adj = 0; | |
| 1356 else if (hrestime_adj > 0) { | |
| 1357 if (hrestime_adj < max_hres_adj) | |
| 1358 adj = hrestime_adj; | |
| 1359 else | |
| 1360 adj = max_hres_adj; | |
| 1361 } else { | |
| 1362 if (hrestime_adj < -max_hres_adj) | |
| 1363 adj = -max_hres_adj; | |
| 1364 else | |
| 1365 adj = hrestime_adj; | |
| 1366 } | |
| 1367 | |
| 1368 timedelta -= adj; | |
| 1369 hrestime_adj = timedelta; | |
| 1370 hrestime.tv_nsec += adj; | |
| 1371 | |
| 1372 while (hrestime.tv_nsec >= NANOSEC) { | |
| 1373 one_sec++; | |
| 1374 hrestime.tv_sec++; | |
| 1375 hrestime.tv_nsec -= NANOSEC; | |
| 1376 } | |
| 1377 } | |
| 1378 #endif | |
| 1379 | |
| 1380 /* | |
| 1381 * Wrapper functions to maintain backwards compability | |
| 1382 */ | |
| 1383 int | |
| 1384 xcopyin(const void *uaddr, void *kaddr, size_t count) | |
| 1385 { | |
| 1386 return (xcopyin_nta(uaddr, kaddr, count, UIO_COPY_CACHED)); | |
| 1387 } | |
| 1388 | |
| 1389 int | |
| 1390 xcopyout(const void *kaddr, void *uaddr, size_t count) | |
| 1391 { | |
| 1392 return (xcopyout_nta(kaddr, uaddr, count, UIO_COPY_CACHED)); | |
| 1393 } |