Mercurial > illumos > illumos-gate
annotate usr/src/uts/intel/ia32/os/archdep.c @ 13905:b151bd260b71
3414 Need a new word of AT_SUN_HWCAP bits
3415 Add isainfo support for f16c and rdrand
3416 Need disassembler support for rdrand and f16c
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: Hans Rosenfeld <hans.rosenfeld@nexenta.com>
Approved by: Garrett D'Amore <garrett@damore.org>
author | Robert Mustacchi <rm@joyent.com> |
---|---|
date | Thu, 13 Dec 2012 11:29:00 -0800 |
parents | 2b3b7ee313ef |
children | b74723e0c05f |
rev | line source |
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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 /* | |
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22 * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 23 */ |
24 | |
25 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ | |
26 /* All Rights Reserved */ | |
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27 /* |
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28 * Copyright (c) 2012, Joyent, Inc. All rights reserved. |
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29 */ |
0 | 30 |
31 #include <sys/param.h> | |
32 #include <sys/types.h> | |
33 #include <sys/vmparam.h> | |
34 #include <sys/systm.h> | |
35 #include <sys/signal.h> | |
36 #include <sys/stack.h> | |
37 #include <sys/regset.h> | |
38 #include <sys/privregs.h> | |
39 #include <sys/frame.h> | |
40 #include <sys/proc.h> | |
41 #include <sys/psw.h> | |
42 #include <sys/siginfo.h> | |
43 #include <sys/cpuvar.h> | |
44 #include <sys/asm_linkage.h> | |
45 #include <sys/kmem.h> | |
46 #include <sys/errno.h> | |
47 #include <sys/bootconf.h> | |
48 #include <sys/archsystm.h> | |
49 #include <sys/debug.h> | |
50 #include <sys/elf.h> | |
51 #include <sys/spl.h> | |
52 #include <sys/time.h> | |
53 #include <sys/atomic.h> | |
54 #include <sys/sysmacros.h> | |
55 #include <sys/cmn_err.h> | |
56 #include <sys/modctl.h> | |
57 #include <sys/kobj.h> | |
58 #include <sys/panic.h> | |
59 #include <sys/reboot.h> | |
60 #include <sys/time.h> | |
61 #include <sys/fp.h> | |
62 #include <sys/x86_archext.h> | |
63 #include <sys/auxv.h> | |
64 #include <sys/auxv_386.h> | |
65 #include <sys/dtrace.h> | |
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66 #include <sys/brand.h> |
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67 #include <sys/machbrand.h> |
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68 #include <sys/cmn_err.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 } | |
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285 } |
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286 /* |
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287 * Else: if we are trying to change the FPU state of a thread which |
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288 * hasn't yet initialized floating point, store the state in |
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289 * the pcb and indicate that the state is valid. When the |
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290 * thread enables floating point, it will use this state instead |
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291 * of the default state. |
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292 */ |
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293 |
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294 switch (fp_save_mech) { |
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295 #if defined(__i386) |
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296 case FP_FNSAVE: |
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297 bcopy(fp, &fpu->fpu_regs.kfpu_u.kfpu_fn, |
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298 sizeof (fpu->fpu_regs.kfpu_u.kfpu_fn)); |
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299 break; |
0 | 300 #endif |
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301 case FP_FXSAVE: |
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302 fpregset_to_fxsave(fp, &fpu->fpu_regs.kfpu_u.kfpu_fx); |
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303 fpu->fpu_regs.kfpu_xstatus = |
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304 fp->fp_reg_set.fpchip_state.xstatus; |
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305 break; |
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306 |
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307 case FP_XSAVE: |
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308 fpregset_to_fxsave(fp, |
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309 &fpu->fpu_regs.kfpu_u.kfpu_xs.xs_fxsave); |
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310 fpu->fpu_regs.kfpu_xstatus = |
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311 fp->fp_reg_set.fpchip_state.xstatus; |
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312 fpu->fpu_regs.kfpu_u.kfpu_xs.xs_xstate_bv |= |
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313 (XFEATURE_LEGACY_FP | XFEATURE_SSE); |
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314 break; |
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315 default: |
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316 panic("Invalid fp_save_mech"); |
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317 /*NOTREACHED*/ |
0 | 318 } |
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319 |
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320 fpu->fpu_regs.kfpu_status = fp->fp_reg_set.fpchip_state.status; |
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321 fpu->fpu_flags |= FPU_VALID; |
0 | 322 } |
323 | |
324 /* | |
325 * Get floating-point registers into a native fpregset_t. | |
326 */ | |
327 void | |
328 getfpregs(klwp_t *lwp, fpregset_t *fp) | |
329 { | |
330 struct fpu_ctx *fpu = &lwp->lwp_pcb.pcb_fpu; | |
331 | |
332 kpreempt_disable(); | |
333 if (fpu->fpu_flags & FPU_EN) { | |
334 /* | |
335 * If we have FPU hw and the thread's pcb doesn't have | |
336 * a valid FPU state then get the state from the hw. | |
337 */ | |
338 if (fpu_exists && ttolwp(curthread) == lwp && | |
339 !(fpu->fpu_flags & FPU_VALID)) | |
340 fp_save(fpu); /* get the current FPU state */ | |
341 } | |
342 | |
343 /* | |
344 * There are 3 possible cases we have to be aware of here: | |
345 * | |
346 * 1. FPU is enabled. FPU state is stored in the current LWP. | |
347 * | |
348 * 2. FPU is not enabled, and there have been no intervening /proc | |
349 * modifications. Return initial FPU state. | |
350 * | |
351 * 3. FPU is not enabled, but a /proc consumer has modified FPU state. | |
352 * FPU state is stored in the current LWP. | |
353 */ | |
354 if ((fpu->fpu_flags & FPU_EN) || (fpu->fpu_flags & FPU_VALID)) { | |
355 /* | |
356 * Cases 1 and 3. | |
357 */ | |
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358 switch (fp_save_mech) { |
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359 #if defined(__i386) |
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360 case FP_FNSAVE: |
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361 bcopy(&fpu->fpu_regs.kfpu_u.kfpu_fn, fp, |
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362 sizeof (fpu->fpu_regs.kfpu_u.kfpu_fn)); |
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363 break; |
0 | 364 #endif |
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365 case FP_FXSAVE: |
0 | 366 fxsave_to_fpregset(&fpu->fpu_regs.kfpu_u.kfpu_fx, fp); |
367 fp->fp_reg_set.fpchip_state.xstatus = | |
368 fpu->fpu_regs.kfpu_xstatus; | |
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369 break; |
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370 case FP_XSAVE: |
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371 fxsave_to_fpregset( |
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372 &fpu->fpu_regs.kfpu_u.kfpu_xs.xs_fxsave, fp); |
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373 fp->fp_reg_set.fpchip_state.xstatus = |
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374 fpu->fpu_regs.kfpu_xstatus; |
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375 break; |
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376 default: |
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377 panic("Invalid fp_save_mech"); |
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378 /*NOTREACHED*/ |
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379 } |
0 | 380 fp->fp_reg_set.fpchip_state.status = fpu->fpu_regs.kfpu_status; |
381 } else { | |
382 /* | |
383 * Case 2. | |
384 */ | |
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385 switch (fp_save_mech) { |
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386 #if defined(__i386) |
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387 case FP_FNSAVE: |
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388 bcopy(&x87_initial, fp, sizeof (x87_initial)); |
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389 break; |
0 | 390 #endif |
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391 case FP_FXSAVE: |
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392 case FP_XSAVE: |
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393 /* |
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394 * For now, we don't have any AVX specific field in ABI. |
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395 * If we add any in the future, we need to initial them |
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396 * as well. |
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397 */ |
0 | 398 fxsave_to_fpregset(&sse_initial, fp); |
399 fp->fp_reg_set.fpchip_state.xstatus = | |
400 fpu->fpu_regs.kfpu_xstatus; | |
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401 break; |
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402 default: |
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403 panic("Invalid fp_save_mech"); |
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404 /*NOTREACHED*/ |
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405 } |
0 | 406 fp->fp_reg_set.fpchip_state.status = fpu->fpu_regs.kfpu_status; |
407 } | |
408 kpreempt_enable(); | |
409 } | |
410 | |
411 #if defined(_SYSCALL32_IMPL) | |
412 | |
413 /* | |
414 * Set floating-point registers from an fpregset32_t. | |
415 */ | |
416 void | |
417 setfpregs32(klwp_t *lwp, fpregset32_t *fp) | |
418 { | |
419 fpregset_t fpregs; | |
420 | |
421 fpregset_32ton(fp, &fpregs); | |
422 setfpregs(lwp, &fpregs); | |
423 } | |
424 | |
425 /* | |
426 * Get floating-point registers into an fpregset32_t. | |
427 */ | |
428 void | |
429 getfpregs32(klwp_t *lwp, fpregset32_t *fp) | |
430 { | |
431 fpregset_t fpregs; | |
432 | |
433 getfpregs(lwp, &fpregs); | |
434 fpregset_nto32(&fpregs, fp); | |
435 } | |
436 | |
437 #endif /* _SYSCALL32_IMPL */ | |
438 | |
439 /* | |
440 * Return the general registers | |
441 */ | |
442 void | |
443 getgregs(klwp_t *lwp, gregset_t grp) | |
444 { | |
445 struct regs *rp = lwptoregs(lwp); | |
446 #if defined(__amd64) | |
447 struct pcb *pcb = &lwp->lwp_pcb; | |
448 int thisthread = lwptot(lwp) == curthread; | |
449 | |
450 grp[REG_RDI] = rp->r_rdi; | |
451 grp[REG_RSI] = rp->r_rsi; | |
452 grp[REG_RDX] = rp->r_rdx; | |
453 grp[REG_RCX] = rp->r_rcx; | |
454 grp[REG_R8] = rp->r_r8; | |
455 grp[REG_R9] = rp->r_r9; | |
456 grp[REG_RAX] = rp->r_rax; | |
457 grp[REG_RBX] = rp->r_rbx; | |
458 grp[REG_RBP] = rp->r_rbp; | |
459 grp[REG_R10] = rp->r_r10; | |
460 grp[REG_R11] = rp->r_r11; | |
461 grp[REG_R12] = rp->r_r12; | |
462 grp[REG_R13] = rp->r_r13; | |
463 grp[REG_R14] = rp->r_r14; | |
464 grp[REG_R15] = rp->r_r15; | |
465 grp[REG_FSBASE] = pcb->pcb_fsbase; | |
466 grp[REG_GSBASE] = pcb->pcb_gsbase; | |
467 if (thisthread) | |
468 kpreempt_disable(); | |
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469 if (pcb->pcb_rupdate == 1) { |
0 | 470 grp[REG_DS] = pcb->pcb_ds; |
471 grp[REG_ES] = pcb->pcb_es; | |
472 grp[REG_FS] = pcb->pcb_fs; | |
473 grp[REG_GS] = pcb->pcb_gs; | |
474 } else { | |
475 grp[REG_DS] = rp->r_ds; | |
476 grp[REG_ES] = rp->r_es; | |
477 grp[REG_FS] = rp->r_fs; | |
478 grp[REG_GS] = rp->r_gs; | |
479 } | |
480 if (thisthread) | |
481 kpreempt_enable(); | |
482 grp[REG_TRAPNO] = rp->r_trapno; | |
483 grp[REG_ERR] = rp->r_err; | |
484 grp[REG_RIP] = rp->r_rip; | |
485 grp[REG_CS] = rp->r_cs; | |
486 grp[REG_SS] = rp->r_ss; | |
487 grp[REG_RFL] = rp->r_rfl; | |
488 grp[REG_RSP] = rp->r_rsp; | |
489 #else | |
490 bcopy(&rp->r_gs, grp, sizeof (gregset_t)); | |
491 #endif | |
492 } | |
493 | |
494 #if defined(_SYSCALL32_IMPL) | |
495 | |
496 void | |
497 getgregs32(klwp_t *lwp, gregset32_t grp) | |
498 { | |
499 struct regs *rp = lwptoregs(lwp); | |
500 struct pcb *pcb = &lwp->lwp_pcb; | |
501 int thisthread = lwptot(lwp) == curthread; | |
502 | |
503 if (thisthread) | |
504 kpreempt_disable(); | |
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505 if (pcb->pcb_rupdate == 1) { |
0 | 506 grp[GS] = (uint16_t)pcb->pcb_gs; |
507 grp[FS] = (uint16_t)pcb->pcb_fs; | |
508 grp[DS] = (uint16_t)pcb->pcb_ds; | |
509 grp[ES] = (uint16_t)pcb->pcb_es; | |
510 } else { | |
511 grp[GS] = (uint16_t)rp->r_gs; | |
512 grp[FS] = (uint16_t)rp->r_fs; | |
513 grp[DS] = (uint16_t)rp->r_ds; | |
514 grp[ES] = (uint16_t)rp->r_es; | |
515 } | |
516 if (thisthread) | |
517 kpreempt_enable(); | |
518 grp[EDI] = (greg32_t)rp->r_rdi; | |
519 grp[ESI] = (greg32_t)rp->r_rsi; | |
520 grp[EBP] = (greg32_t)rp->r_rbp; | |
521 grp[ESP] = 0; | |
522 grp[EBX] = (greg32_t)rp->r_rbx; | |
523 grp[EDX] = (greg32_t)rp->r_rdx; | |
524 grp[ECX] = (greg32_t)rp->r_rcx; | |
525 grp[EAX] = (greg32_t)rp->r_rax; | |
526 grp[TRAPNO] = (greg32_t)rp->r_trapno; | |
527 grp[ERR] = (greg32_t)rp->r_err; | |
528 grp[EIP] = (greg32_t)rp->r_rip; | |
529 grp[CS] = (uint16_t)rp->r_cs; | |
530 grp[EFL] = (greg32_t)rp->r_rfl; | |
531 grp[UESP] = (greg32_t)rp->r_rsp; | |
532 grp[SS] = (uint16_t)rp->r_ss; | |
533 } | |
534 | |
535 void | |
536 ucontext_32ton(const ucontext32_t *src, ucontext_t *dst) | |
537 { | |
538 mcontext_t *dmc = &dst->uc_mcontext; | |
539 const mcontext32_t *smc = &src->uc_mcontext; | |
540 | |
541 bzero(dst, sizeof (*dst)); | |
542 dst->uc_flags = src->uc_flags; | |
543 dst->uc_link = (ucontext_t *)(uintptr_t)src->uc_link; | |
544 | |
545 bcopy(&src->uc_sigmask, &dst->uc_sigmask, sizeof (dst->uc_sigmask)); | |
546 | |
547 dst->uc_stack.ss_sp = (void *)(uintptr_t)src->uc_stack.ss_sp; | |
548 dst->uc_stack.ss_size = (size_t)src->uc_stack.ss_size; | |
549 dst->uc_stack.ss_flags = src->uc_stack.ss_flags; | |
550 | |
551 dmc->gregs[REG_GS] = (greg_t)(uint32_t)smc->gregs[GS]; | |
552 dmc->gregs[REG_FS] = (greg_t)(uint32_t)smc->gregs[FS]; | |
553 dmc->gregs[REG_ES] = (greg_t)(uint32_t)smc->gregs[ES]; | |
554 dmc->gregs[REG_DS] = (greg_t)(uint32_t)smc->gregs[DS]; | |
555 dmc->gregs[REG_RDI] = (greg_t)(uint32_t)smc->gregs[EDI]; | |
556 dmc->gregs[REG_RSI] = (greg_t)(uint32_t)smc->gregs[ESI]; | |
557 dmc->gregs[REG_RBP] = (greg_t)(uint32_t)smc->gregs[EBP]; | |
558 dmc->gregs[REG_RBX] = (greg_t)(uint32_t)smc->gregs[EBX]; | |
559 dmc->gregs[REG_RDX] = (greg_t)(uint32_t)smc->gregs[EDX]; | |
560 dmc->gregs[REG_RCX] = (greg_t)(uint32_t)smc->gregs[ECX]; | |
561 dmc->gregs[REG_RAX] = (greg_t)(uint32_t)smc->gregs[EAX]; | |
562 dmc->gregs[REG_TRAPNO] = (greg_t)(uint32_t)smc->gregs[TRAPNO]; | |
563 dmc->gregs[REG_ERR] = (greg_t)(uint32_t)smc->gregs[ERR]; | |
564 dmc->gregs[REG_RIP] = (greg_t)(uint32_t)smc->gregs[EIP]; | |
565 dmc->gregs[REG_CS] = (greg_t)(uint32_t)smc->gregs[CS]; | |
566 dmc->gregs[REG_RFL] = (greg_t)(uint32_t)smc->gregs[EFL]; | |
567 dmc->gregs[REG_RSP] = (greg_t)(uint32_t)smc->gregs[UESP]; | |
568 dmc->gregs[REG_SS] = (greg_t)(uint32_t)smc->gregs[SS]; | |
569 | |
570 /* | |
571 * A valid fpregs is only copied in if uc.uc_flags has UC_FPU set | |
572 * otherwise there is no guarantee that anything in fpregs is valid. | |
573 */ | |
574 if (src->uc_flags & UC_FPU) | |
575 fpregset_32ton(&src->uc_mcontext.fpregs, | |
576 &dst->uc_mcontext.fpregs); | |
577 } | |
578 | |
579 #endif /* _SYSCALL32_IMPL */ | |
580 | |
581 /* | |
582 * Return the user-level PC. | |
583 * If in a system call, return the address of the syscall trap. | |
584 */ | |
585 greg_t | |
586 getuserpc() | |
587 { | |
588 greg_t upc = lwptoregs(ttolwp(curthread))->r_pc; | |
589 uint32_t insn; | |
590 | |
591 if (curthread->t_sysnum == 0) | |
592 return (upc); | |
593 | |
594 /* | |
595 * We might've gotten here from sysenter (0xf 0x34), | |
596 * syscall (0xf 0x5) or lcall (0x9a 0 0 0 0 0x27 0). | |
597 * | |
598 * Go peek at the binary to figure it out.. | |
599 */ | |
600 if (fuword32((void *)(upc - 2), &insn) != -1 && | |
601 (insn & 0xffff) == 0x340f || (insn & 0xffff) == 0x050f) | |
602 return (upc - 2); | |
603 return (upc - 7); | |
604 } | |
605 | |
606 /* | |
607 * Protect segment registers from non-user privilege levels and GDT selectors | |
608 * other than USER_CS, USER_DS and lwp FS and GS values. If the segment | |
609 * selector is non-null and not USER_CS/USER_DS, we make sure that the | |
610 * TI bit is set to point into the LDT and that the RPL is set to 3. | |
611 * | |
612 * Since struct regs stores each 16-bit segment register as a 32-bit greg_t, we | |
613 * also explicitly zero the top 16 bits since they may be coming from the | |
614 * user's address space via setcontext(2) or /proc. | |
5084 | 615 * |
616 * Note about null selector. When running on the hypervisor if we allow a | |
617 * process to set its %cs to null selector with RPL of 0 the hypervisor will | |
618 * crash the domain. If running on bare metal we would get a #gp fault and | |
619 * be able to kill the process and continue on. Therefore we make sure to | |
620 * force RPL to SEL_UPL even for null selector when setting %cs. | |
0 | 621 */ |
622 | |
5084 | 623 #if defined(IS_CS) || defined(IS_NOT_CS) |
624 #error "IS_CS and IS_NOT_CS already defined" | |
625 #endif | |
626 | |
627 #define IS_CS 1 | |
628 #define IS_NOT_CS 0 | |
629 | |
0 | 630 /*ARGSUSED*/ |
631 static greg_t | |
5084 | 632 fix_segreg(greg_t sr, int iscs, model_t datamodel) |
0 | 633 { |
634 switch (sr &= 0xffff) { | |
5084 | 635 |
636 case 0: | |
637 if (iscs == IS_CS) | |
638 return (0 | SEL_UPL); | |
639 else | |
640 return (0); | |
641 | |
0 | 642 #if defined(__amd64) |
643 /* | |
644 * If lwp attempts to switch data model then force their | |
645 * code selector to be null selector. | |
646 */ | |
647 case U32CS_SEL: | |
648 if (datamodel == DATAMODEL_NATIVE) | |
5084 | 649 return (0 | SEL_UPL); |
0 | 650 else |
651 return (sr); | |
652 | |
653 case UCS_SEL: | |
654 if (datamodel == DATAMODEL_ILP32) | |
5084 | 655 return (0 | SEL_UPL); |
0 | 656 #elif defined(__i386) |
657 case UCS_SEL: | |
658 #endif | |
659 /*FALLTHROUGH*/ | |
660 case UDS_SEL: | |
661 case LWPFS_SEL: | |
662 case LWPGS_SEL: | |
5084 | 663 case SEL_UPL: |
0 | 664 return (sr); |
665 default: | |
666 break; | |
667 } | |
668 | |
669 /* | |
1217 | 670 * Force it into the LDT in ring 3 for 32-bit processes, which by |
671 * default do not have an LDT, so that any attempt to use an invalid | |
5084 | 672 * selector will reference the (non-existant) LDT, and cause a #gp |
673 * fault for the process. | |
1217 | 674 * |
0 | 675 * 64-bit processes get the null gdt selector since they |
676 * are not allowed to have a private LDT. | |
677 */ | |
678 #if defined(__amd64) | |
5084 | 679 if (datamodel == DATAMODEL_ILP32) { |
680 return (sr | SEL_TI_LDT | SEL_UPL); | |
681 } else { | |
682 if (iscs == IS_CS) | |
683 return (0 | SEL_UPL); | |
684 else | |
685 return (0); | |
686 } | |
687 | |
0 | 688 #elif defined(__i386) |
689 return (sr | SEL_TI_LDT | SEL_UPL); | |
690 #endif | |
691 } | |
692 | |
693 /* | |
694 * Set general registers. | |
695 */ | |
696 void | |
697 setgregs(klwp_t *lwp, gregset_t grp) | |
698 { | |
699 struct regs *rp = lwptoregs(lwp); | |
700 model_t datamodel = lwp_getdatamodel(lwp); | |
701 | |
702 #if defined(__amd64) | |
703 struct pcb *pcb = &lwp->lwp_pcb; | |
704 int thisthread = lwptot(lwp) == curthread; | |
705 | |
706 if (datamodel == DATAMODEL_NATIVE) { | |
707 | |
708 if (thisthread) | |
709 (void) save_syscall_args(); /* copy the args */ | |
710 | |
711 rp->r_rdi = grp[REG_RDI]; | |
712 rp->r_rsi = grp[REG_RSI]; | |
713 rp->r_rdx = grp[REG_RDX]; | |
714 rp->r_rcx = grp[REG_RCX]; | |
715 rp->r_r8 = grp[REG_R8]; | |
716 rp->r_r9 = grp[REG_R9]; | |
717 rp->r_rax = grp[REG_RAX]; | |
718 rp->r_rbx = grp[REG_RBX]; | |
719 rp->r_rbp = grp[REG_RBP]; | |
720 rp->r_r10 = grp[REG_R10]; | |
721 rp->r_r11 = grp[REG_R11]; | |
722 rp->r_r12 = grp[REG_R12]; | |
723 rp->r_r13 = grp[REG_R13]; | |
724 rp->r_r14 = grp[REG_R14]; | |
725 rp->r_r15 = grp[REG_R15]; | |
726 rp->r_trapno = grp[REG_TRAPNO]; | |
727 rp->r_err = grp[REG_ERR]; | |
728 rp->r_rip = grp[REG_RIP]; | |
729 /* | |
730 * Setting %cs or %ss to anything else is quietly but | |
731 * quite definitely forbidden! | |
732 */ | |
733 rp->r_cs = UCS_SEL; | |
734 rp->r_ss = UDS_SEL; | |
735 rp->r_rsp = grp[REG_RSP]; | |
736 | |
737 if (thisthread) | |
738 kpreempt_disable(); | |
739 | |
740 pcb->pcb_ds = UDS_SEL; | |
741 pcb->pcb_es = UDS_SEL; | |
742 | |
743 /* | |
744 * 64-bit processes -are- allowed to set their fsbase/gsbase | |
745 * values directly, but only if they're using the segment | |
746 * selectors that allow that semantic. | |
747 * | |
748 * (32-bit processes must use lwp_set_private().) | |
749 */ | |
750 pcb->pcb_fsbase = grp[REG_FSBASE]; | |
751 pcb->pcb_gsbase = grp[REG_GSBASE]; | |
5084 | 752 pcb->pcb_fs = fix_segreg(grp[REG_FS], IS_NOT_CS, datamodel); |
753 pcb->pcb_gs = fix_segreg(grp[REG_GS], IS_NOT_CS, datamodel); | |
0 | 754 |
755 /* | |
756 * Ensure that we go out via update_sregs | |
757 */ | |
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758 pcb->pcb_rupdate = 1; |
0 | 759 lwptot(lwp)->t_post_sys = 1; |
760 if (thisthread) | |
761 kpreempt_enable(); | |
762 #if defined(_SYSCALL32_IMPL) | |
763 } else { | |
764 rp->r_rdi = (uint32_t)grp[REG_RDI]; | |
765 rp->r_rsi = (uint32_t)grp[REG_RSI]; | |
766 rp->r_rdx = (uint32_t)grp[REG_RDX]; | |
767 rp->r_rcx = (uint32_t)grp[REG_RCX]; | |
768 rp->r_rax = (uint32_t)grp[REG_RAX]; | |
769 rp->r_rbx = (uint32_t)grp[REG_RBX]; | |
770 rp->r_rbp = (uint32_t)grp[REG_RBP]; | |
771 rp->r_trapno = (uint32_t)grp[REG_TRAPNO]; | |
772 rp->r_err = (uint32_t)grp[REG_ERR]; | |
773 rp->r_rip = (uint32_t)grp[REG_RIP]; | |
774 | |
5084 | 775 rp->r_cs = fix_segreg(grp[REG_CS], IS_CS, datamodel); |
776 rp->r_ss = fix_segreg(grp[REG_DS], IS_NOT_CS, datamodel); | |
0 | 777 |
778 rp->r_rsp = (uint32_t)grp[REG_RSP]; | |
779 | |
780 if (thisthread) | |
781 kpreempt_disable(); | |
782 | |
5084 | 783 pcb->pcb_ds = fix_segreg(grp[REG_DS], IS_NOT_CS, datamodel); |
784 pcb->pcb_es = fix_segreg(grp[REG_ES], IS_NOT_CS, datamodel); | |
0 | 785 |
786 /* | |
787 * (See fsbase/gsbase commentary above) | |
788 */ | |
5084 | 789 pcb->pcb_fs = fix_segreg(grp[REG_FS], IS_NOT_CS, datamodel); |
790 pcb->pcb_gs = fix_segreg(grp[REG_GS], IS_NOT_CS, datamodel); | |
0 | 791 |
792 /* | |
793 * Ensure that we go out via update_sregs | |
794 */ | |
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795 pcb->pcb_rupdate = 1; |
0 | 796 lwptot(lwp)->t_post_sys = 1; |
797 if (thisthread) | |
798 kpreempt_enable(); | |
799 #endif | |
800 } | |
801 | |
802 /* | |
803 * Only certain bits of the flags register can be modified. | |
804 */ | |
805 rp->r_rfl = (rp->r_rfl & ~PSL_USERMASK) | | |
806 (grp[REG_RFL] & PSL_USERMASK); | |
807 | |
808 #elif defined(__i386) | |
809 | |
810 /* | |
811 * Only certain bits of the flags register can be modified. | |
812 */ | |
813 grp[EFL] = (rp->r_efl & ~PSL_USERMASK) | (grp[EFL] & PSL_USERMASK); | |
814 | |
815 /* | |
816 * Copy saved registers from user stack. | |
817 */ | |
818 bcopy(grp, &rp->r_gs, sizeof (gregset_t)); | |
819 | |
5084 | 820 rp->r_cs = fix_segreg(rp->r_cs, IS_CS, datamodel); |
821 rp->r_ss = fix_segreg(rp->r_ss, IS_NOT_CS, datamodel); | |
822 rp->r_ds = fix_segreg(rp->r_ds, IS_NOT_CS, datamodel); | |
823 rp->r_es = fix_segreg(rp->r_es, IS_NOT_CS, datamodel); | |
824 rp->r_fs = fix_segreg(rp->r_fs, IS_NOT_CS, datamodel); | |
825 rp->r_gs = fix_segreg(rp->r_gs, IS_NOT_CS, datamodel); | |
0 | 826 |
827 #endif /* __i386 */ | |
828 } | |
829 | |
830 /* | |
831 * Determine whether eip is likely to have an interrupt frame | |
832 * on the stack. We do this by comparing the address to the | |
833 * range of addresses spanned by several well-known routines. | |
834 */ | |
835 extern void _interrupt(); | |
836 extern void _allsyscalls(); | |
837 extern void _cmntrap(); | |
838 extern void fakesoftint(); | |
839 | |
840 extern size_t _interrupt_size; | |
841 extern size_t _allsyscalls_size; | |
842 extern size_t _cmntrap_size; | |
843 extern size_t _fakesoftint_size; | |
844 | |
845 /* | |
846 * Get a pc-only stacktrace. Used for kmem_alloc() buffer ownership tracking. | |
847 * Returns MIN(current stack depth, pcstack_limit). | |
848 */ | |
849 int | |
850 getpcstack(pc_t *pcstack, int pcstack_limit) | |
851 { | |
852 struct frame *fp = (struct frame *)getfp(); | |
853 struct frame *nextfp, *minfp, *stacktop; | |
854 int depth = 0; | |
855 int on_intr; | |
856 uintptr_t pc; | |
857 | |
858 if ((on_intr = CPU_ON_INTR(CPU)) != 0) | |
859 stacktop = (struct frame *)(CPU->cpu_intr_stack + SA(MINFRAME)); | |
860 else | |
861 stacktop = (struct frame *)curthread->t_stk; | |
862 minfp = fp; | |
863 | |
864 pc = ((struct regs *)fp)->r_pc; | |
865 | |
866 while (depth < pcstack_limit) { | |
867 nextfp = (struct frame *)fp->fr_savfp; | |
868 pc = fp->fr_savpc; | |
869 if (nextfp <= minfp || nextfp >= stacktop) { | |
870 if (on_intr) { | |
871 /* | |
872 * Hop from interrupt stack to thread stack. | |
873 */ | |
874 stacktop = (struct frame *)curthread->t_stk; | |
875 minfp = (struct frame *)curthread->t_stkbase; | |
876 on_intr = 0; | |
877 continue; | |
878 } | |
879 break; | |
880 } | |
881 pcstack[depth++] = (pc_t)pc; | |
882 fp = nextfp; | |
883 minfp = fp; | |
884 } | |
885 return (depth); | |
886 } | |
887 | |
888 /* | |
889 * The following ELF header fields are defined as processor-specific | |
890 * in the V8 ABI: | |
891 * | |
892 * e_ident[EI_DATA] encoding of the processor-specific | |
893 * data in the object file | |
894 * e_machine processor identification | |
895 * e_flags processor-specific flags associated | |
896 * with the file | |
897 */ | |
898 | |
899 /* | |
900 * The value of at_flags reflects a platform's cpu module support. | |
901 * at_flags is used to check for allowing a binary to execute and | |
902 * is passed as the value of the AT_FLAGS auxiliary vector. | |
903 */ | |
904 int at_flags = 0; | |
905 | |
906 /* | |
907 * Check the processor-specific fields of an ELF header. | |
908 * | |
909 * returns 1 if the fields are valid, 0 otherwise | |
910 */ | |
911 /*ARGSUSED2*/ | |
912 int | |
913 elfheadcheck( | |
914 unsigned char e_data, | |
915 Elf32_Half e_machine, | |
916 Elf32_Word e_flags) | |
917 { | |
918 if (e_data != ELFDATA2LSB) | |
919 return (0); | |
920 #if defined(__amd64) | |
921 if (e_machine == EM_AMD64) | |
922 return (1); | |
923 #endif | |
924 return (e_machine == EM_386); | |
925 } | |
926 | |
927 uint_t auxv_hwcap_include = 0; /* patch to enable unrecognized features */ | |
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928 uint_t auxv_hwcap_include_2 = 0; /* second word */ |
0 | 929 uint_t auxv_hwcap_exclude = 0; /* patch for broken cpus, debugging */ |
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930 uint_t auxv_hwcap_exclude_2 = 0; /* second word */ |
0 | 931 #if defined(_SYSCALL32_IMPL) |
932 uint_t auxv_hwcap32_include = 0; /* ditto for 32-bit apps */ | |
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933 uint_t auxv_hwcap32_include_2 = 0; /* ditto for 32-bit apps */ |
0 | 934 uint_t auxv_hwcap32_exclude = 0; /* ditto for 32-bit apps */ |
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935 uint_t auxv_hwcap32_exclude_2 = 0; /* ditto for 32-bit apps */ |
0 | 936 #endif |
937 | |
938 /* | |
939 * Gather information about the processor and place it into auxv_hwcap | |
940 * so that it can be exported to the linker via the aux vector. | |
941 * | |
942 * We use this seemingly complicated mechanism so that we can ensure | |
943 * that /etc/system can be used to override what the system can or | |
944 * cannot discover for itself. | |
945 */ | |
946 void | |
947 bind_hwcap(void) | |
948 { | |
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949 uint_t cpu_hwcap_flags[2]; |
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950 cpuid_pass4(NULL, cpu_hwcap_flags); |
0 | 951 |
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952 auxv_hwcap = (auxv_hwcap_include | cpu_hwcap_flags[0]) & |
0 | 953 ~auxv_hwcap_exclude; |
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954 auxv_hwcap_2 = (auxv_hwcap_include_2 | cpu_hwcap_flags[1]) & |
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955 ~auxv_hwcap_exclude_2; |
0 | 956 |
957 #if defined(__amd64) | |
958 /* | |
959 * On AMD processors, sysenter just doesn't work at all | |
960 * when the kernel is in long mode. On IA-32e processors | |
961 * it does, but there's no real point in all the alternate | |
962 * mechanism when syscall works on both. | |
963 * | |
964 * Besides, the kernel's sysenter handler is expecting a | |
965 * 32-bit lwp ... | |
966 */ | |
967 auxv_hwcap &= ~AV_386_SEP; | |
3446 | 968 #else |
969 /* | |
970 * 32-bit processes can -always- use the lahf/sahf instructions | |
971 */ | |
972 auxv_hwcap |= AV_386_AHF; | |
0 | 973 #endif |
974 | |
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975 if (auxv_hwcap_include || auxv_hwcap_exclude || auxv_hwcap_include_2 || |
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976 auxv_hwcap_exclude_2) { |
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977 /* |
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978 * The below assignment is regrettably required to get lint |
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979 * to accept the validity of our format string. The format |
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980 * string is in fact valid, but whatever intelligence in lint |
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981 * understands the cmn_err()-specific %b appears to have an |
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982 * off-by-one error: it (mistakenly) complains about bit |
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983 * number 32 (even though this is explicitly permitted). |
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984 * Normally, one would will away such warnings with a "LINTED" |
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985 * directive, but for reasons unclear and unknown, lint |
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986 * refuses to be assuaged in this case. Fortunately, lint |
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987 * doesn't pretend to have solved the Halting Problem -- |
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988 * and as soon as the format string is programmatic, it |
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989 * knows enough to shut up. |
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990 */ |
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991 char *fmt = "?user ABI extensions: %b\n"; |
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992 cmn_err(CE_CONT, fmt, auxv_hwcap, FMT_AV_386); |
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993 fmt = "?user ABI extensions (word 2): %b\n"; |
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994 cmn_err(CE_CONT, fmt, auxv_hwcap_2, FMT_AV_386_2); |
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995 } |
0 | 996 |
997 #if defined(_SYSCALL32_IMPL) | |
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998 auxv_hwcap32 = (auxv_hwcap32_include | cpu_hwcap_flags[0]) & |
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999 ~auxv_hwcap32_exclude; |
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1000 auxv_hwcap32_2 = (auxv_hwcap32_include_2 | cpu_hwcap_flags[1]) & |
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1001 ~auxv_hwcap32_exclude_2; |
0 | 1002 |
1003 #if defined(__amd64) | |
1004 /* | |
1005 * If this is an amd64 architecture machine from Intel, then | |
1006 * syscall -doesn't- work in compatibility mode, only sysenter does. | |
1007 * | |
1008 * Sigh. | |
1009 */ | |
1010 if (!cpuid_syscall32_insn(NULL)) | |
1011 auxv_hwcap32 &= ~AV_386_AMD_SYSC; | |
3446 | 1012 |
1013 /* | |
1014 * 32-bit processes can -always- use the lahf/sahf instructions | |
1015 */ | |
1016 auxv_hwcap32 |= AV_386_AHF; | |
0 | 1017 #endif |
1018 | |
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1019 if (auxv_hwcap32_include || auxv_hwcap32_exclude || |
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1020 auxv_hwcap32_include_2 || auxv_hwcap32_exclude_2) { |
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1021 /* |
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1022 * See the block comment in the cmn_err() of auxv_hwcap, above. |
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1023 */ |
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1024 char *fmt = "?32-bit user ABI extensions: %b\n"; |
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1025 cmn_err(CE_CONT, fmt, auxv_hwcap32, FMT_AV_386); |
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1026 fmt = "?32-bit user ABI extensions (word 2): %b\n"; |
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1027 cmn_err(CE_CONT, fmt, auxv_hwcap32_2, FMT_AV_386_2); |
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1028 } |
0 | 1029 #endif |
1030 } | |
1031 | |
1032 /* | |
1033 * sync_icache() - this is called | |
1034 * in proc/fs/prusrio.c. x86 has an unified cache and therefore | |
1035 * this is a nop. | |
1036 */ | |
1037 /* ARGSUSED */ | |
1038 void | |
1039 sync_icache(caddr_t addr, uint_t len) | |
1040 { | |
1041 /* Do nothing for now */ | |
1042 } | |
1043 | |
1044 /*ARGSUSED*/ | |
1045 void | |
1046 sync_data_memory(caddr_t va, size_t len) | |
1047 { | |
1048 /* Not implemented for this platform */ | |
1049 } | |
1050 | |
1051 int | |
1052 __ipltospl(int ipl) | |
1053 { | |
1054 return (ipltospl(ipl)); | |
1055 } | |
1056 | |
1057 /* | |
1058 * The panic code invokes panic_saveregs() to record the contents of a | |
1059 * regs structure into the specified panic_data structure for debuggers. | |
1060 */ | |
1061 void | |
1062 panic_saveregs(panic_data_t *pdp, struct regs *rp) | |
1063 { | |
1064 panic_nv_t *pnv = PANICNVGET(pdp); | |
1065 | |
1066 struct cregs creg; | |
1067 | |
1068 getcregs(&creg); | |
1069 | |
1070 #if defined(__amd64) | |
1071 PANICNVADD(pnv, "rdi", rp->r_rdi); | |
1072 PANICNVADD(pnv, "rsi", rp->r_rsi); | |
1073 PANICNVADD(pnv, "rdx", rp->r_rdx); | |
1074 PANICNVADD(pnv, "rcx", rp->r_rcx); | |
1075 PANICNVADD(pnv, "r8", rp->r_r8); | |
1076 PANICNVADD(pnv, "r9", rp->r_r9); | |
1077 PANICNVADD(pnv, "rax", rp->r_rax); | |
1078 PANICNVADD(pnv, "rbx", rp->r_rbx); | |
1079 PANICNVADD(pnv, "rbp", rp->r_rbp); | |
1080 PANICNVADD(pnv, "r10", rp->r_r10); | |
1081 PANICNVADD(pnv, "r10", rp->r_r10); | |
1082 PANICNVADD(pnv, "r11", rp->r_r11); | |
1083 PANICNVADD(pnv, "r12", rp->r_r12); | |
1084 PANICNVADD(pnv, "r13", rp->r_r13); | |
1085 PANICNVADD(pnv, "r14", rp->r_r14); | |
1086 PANICNVADD(pnv, "r15", rp->r_r15); | |
3446 | 1087 PANICNVADD(pnv, "fsbase", rdmsr(MSR_AMD_FSBASE)); |
1088 PANICNVADD(pnv, "gsbase", rdmsr(MSR_AMD_GSBASE)); | |
0 | 1089 PANICNVADD(pnv, "ds", rp->r_ds); |
1090 PANICNVADD(pnv, "es", rp->r_es); | |
1091 PANICNVADD(pnv, "fs", rp->r_fs); | |
1092 PANICNVADD(pnv, "gs", rp->r_gs); | |
1093 PANICNVADD(pnv, "trapno", rp->r_trapno); | |
1094 PANICNVADD(pnv, "err", rp->r_err); | |
1095 PANICNVADD(pnv, "rip", rp->r_rip); | |
1096 PANICNVADD(pnv, "cs", rp->r_cs); | |
1097 PANICNVADD(pnv, "rflags", rp->r_rfl); | |
1098 PANICNVADD(pnv, "rsp", rp->r_rsp); | |
1099 PANICNVADD(pnv, "ss", rp->r_ss); | |
1100 PANICNVADD(pnv, "gdt_hi", (uint64_t)(creg.cr_gdt._l[3])); | |
1101 PANICNVADD(pnv, "gdt_lo", (uint64_t)(creg.cr_gdt._l[0])); | |
1102 PANICNVADD(pnv, "idt_hi", (uint64_t)(creg.cr_idt._l[3])); | |
1103 PANICNVADD(pnv, "idt_lo", (uint64_t)(creg.cr_idt._l[0])); | |
1104 #elif defined(__i386) | |
1105 PANICNVADD(pnv, "gs", (uint32_t)rp->r_gs); | |
1106 PANICNVADD(pnv, "fs", (uint32_t)rp->r_fs); | |
1107 PANICNVADD(pnv, "es", (uint32_t)rp->r_es); | |
1108 PANICNVADD(pnv, "ds", (uint32_t)rp->r_ds); | |
1109 PANICNVADD(pnv, "edi", (uint32_t)rp->r_edi); | |
1110 PANICNVADD(pnv, "esi", (uint32_t)rp->r_esi); | |
1111 PANICNVADD(pnv, "ebp", (uint32_t)rp->r_ebp); | |
1112 PANICNVADD(pnv, "esp", (uint32_t)rp->r_esp); | |
1113 PANICNVADD(pnv, "ebx", (uint32_t)rp->r_ebx); | |
1114 PANICNVADD(pnv, "edx", (uint32_t)rp->r_edx); | |
1115 PANICNVADD(pnv, "ecx", (uint32_t)rp->r_ecx); | |
1116 PANICNVADD(pnv, "eax", (uint32_t)rp->r_eax); | |
1117 PANICNVADD(pnv, "trapno", (uint32_t)rp->r_trapno); | |
1118 PANICNVADD(pnv, "err", (uint32_t)rp->r_err); | |
1119 PANICNVADD(pnv, "eip", (uint32_t)rp->r_eip); | |
1120 PANICNVADD(pnv, "cs", (uint32_t)rp->r_cs); | |
1121 PANICNVADD(pnv, "eflags", (uint32_t)rp->r_efl); | |
1122 PANICNVADD(pnv, "uesp", (uint32_t)rp->r_uesp); | |
1123 PANICNVADD(pnv, "ss", (uint32_t)rp->r_ss); | |
1124 PANICNVADD(pnv, "gdt", creg.cr_gdt); | |
1125 PANICNVADD(pnv, "idt", creg.cr_idt); | |
1126 #endif /* __i386 */ | |
1127 | |
1128 PANICNVADD(pnv, "ldt", creg.cr_ldt); | |
1129 PANICNVADD(pnv, "task", creg.cr_task); | |
1130 PANICNVADD(pnv, "cr0", creg.cr_cr0); | |
1131 PANICNVADD(pnv, "cr2", creg.cr_cr2); | |
1132 PANICNVADD(pnv, "cr3", creg.cr_cr3); | |
1133 if (creg.cr_cr4) | |
1134 PANICNVADD(pnv, "cr4", creg.cr_cr4); | |
1135 | |
1136 PANICNVSET(pdp, pnv); | |
1137 } | |
1138 | |
1139 #define TR_ARG_MAX 6 /* Max args to print, same as SPARC */ | |
1140 | |
1141 #if !defined(__amd64) | |
1142 | |
1143 /* | |
1144 * Given a return address (%eip), determine the likely number of arguments | |
1145 * that were pushed on the stack prior to its execution. We do this by | |
1146 * expecting that a typical call sequence consists of pushing arguments on | |
1147 * the stack, executing a call instruction, and then performing an add | |
1148 * on %esp to restore it to the value prior to pushing the arguments for | |
1149 * the call. We attempt to detect such an add, and divide the addend | |
1150 * by the size of a word to determine the number of pushed arguments. | |
1151 * | |
1152 * If we do not find such an add, we punt and return TR_ARG_MAX. It is not | |
1153 * possible to reliably determine if a function took no arguments (i.e. was | |
1154 * void) because assembler routines do not reliably perform an add on %esp | |
1155 * immediately upon returning (eg. _sys_call()), so returning TR_ARG_MAX is | |
1156 * safer than returning 0. | |
1157 */ | |
1158 static ulong_t | |
1159 argcount(uintptr_t eip) | |
1160 { | |
1161 const uint8_t *ins = (const uint8_t *)eip; | |
1162 ulong_t n; | |
1163 | |
1164 enum { | |
1165 M_MODRM_ESP = 0xc4, /* Mod/RM byte indicates %esp */ | |
1166 M_ADD_IMM32 = 0x81, /* ADD imm32 to r/m32 */ | |
1167 M_ADD_IMM8 = 0x83 /* ADD imm8 to r/m32 */ | |
1168 }; | |
1169 | |
1170 if (eip < KERNELBASE || ins[1] != M_MODRM_ESP) | |
1171 return (TR_ARG_MAX); | |
1172 | |
1173 switch (ins[0]) { | |
1174 case M_ADD_IMM32: | |
1175 n = ins[2] + (ins[3] << 8) + (ins[4] << 16) + (ins[5] << 24); | |
1176 break; | |
1177 | |
1178 case M_ADD_IMM8: | |
1179 n = ins[2]; | |
1180 break; | |
1181 | |
1182 default: | |
1183 return (TR_ARG_MAX); | |
1184 } | |
1185 | |
1186 n /= sizeof (long); | |
1187 return (MIN(n, TR_ARG_MAX)); | |
1188 } | |
1189 | |
1190 #endif /* !__amd64 */ | |
1191 | |
1192 /* | |
1193 * Print a stack backtrace using the specified frame pointer. We delay two | |
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1194 * seconds before continuing, unless this is the panic traceback. |
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1195 * If we are in the process of panicking, we also attempt to write the |
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1196 * stack backtrace to a staticly assigned buffer, to allow the panic |
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1197 * code to find it and write it in to uncompressed pages within the |
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1198 * system crash dump. |
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1199 * Note that the frame for the starting stack pointer value is omitted because |
0 | 1200 * the corresponding %eip is not known. |
1201 */ | |
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1202 |
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1203 extern char *dump_stack_scratch; |
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1204 |
0 | 1205 #if defined(__amd64) |
1206 | |
1207 void | |
1208 traceback(caddr_t fpreg) | |
1209 { | |
1210 struct frame *fp = (struct frame *)fpreg; | |
1211 struct frame *nextfp; | |
1212 uintptr_t pc, nextpc; | |
1213 ulong_t off; | |
1214 char args[TR_ARG_MAX * 2 + 16], *sym; | |
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1215 uint_t offset = 0; |
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1216 uint_t next_offset = 0; |
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1217 char stack_buffer[1024]; |
0 | 1218 |
1219 if (!panicstr) | |
1220 printf("traceback: %%fp = %p\n", (void *)fp); | |
1221 | |
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1222 if (panicstr && !dump_stack_scratch) { |
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1223 printf("Warning - stack not written to the dump buffer\n"); |
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1224 } |
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1225 |
5084 | 1226 fp = (struct frame *)plat_traceback(fpreg); |
0 | 1227 if ((uintptr_t)fp < KERNELBASE) |
1228 goto out; | |
1229 | |
1230 pc = fp->fr_savpc; | |
1231 fp = (struct frame *)fp->fr_savfp; | |
1232 | |
1233 while ((uintptr_t)fp >= KERNELBASE) { | |
1234 /* | |
1235 * XX64 Until port is complete tolerate 8-byte aligned | |
1236 * frame pointers but flag with a warning so they can | |
1237 * be fixed. | |
1238 */ | |
1239 if (((uintptr_t)fp & (STACK_ALIGN - 1)) != 0) { | |
1240 if (((uintptr_t)fp & (8 - 1)) == 0) { | |
1241 printf(" >> warning! 8-byte" | |
1242 " aligned %%fp = %p\n", (void *)fp); | |
1243 } else { | |
1244 printf( | |
1245 " >> mis-aligned %%fp = %p\n", (void *)fp); | |
1246 break; | |
1247 } | |
1248 } | |
1249 | |
1250 args[0] = '\0'; | |
1251 nextpc = (uintptr_t)fp->fr_savpc; | |
1252 nextfp = (struct frame *)fp->fr_savfp; | |
1253 if ((sym = kobj_getsymname(pc, &off)) != NULL) { | |
1254 printf("%016lx %s:%s+%lx (%s)\n", (uintptr_t)fp, | |
1255 mod_containing_pc((caddr_t)pc), sym, off, args); | |
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1256 (void) snprintf(stack_buffer, sizeof (stack_buffer), |
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1257 "%s:%s+%lx (%s) | ", |
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1258 mod_containing_pc((caddr_t)pc), sym, off, args); |
0 | 1259 } else { |
1260 printf("%016lx %lx (%s)\n", | |
1261 (uintptr_t)fp, pc, args); | |
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1262 (void) snprintf(stack_buffer, sizeof (stack_buffer), |
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1263 "%lx (%s) | ", pc, args); |
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1264 } |
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1265 |
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1266 if (panicstr && dump_stack_scratch) { |
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1267 next_offset = offset + strlen(stack_buffer); |
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1268 if (next_offset < STACK_BUF_SIZE) { |
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1269 bcopy(stack_buffer, dump_stack_scratch + offset, |
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1270 strlen(stack_buffer)); |
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1271 offset = next_offset; |
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1272 } else { |
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1273 /* |
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1274 * In attempting to save the panic stack |
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1275 * to the dumpbuf we have overflowed that area. |
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1276 * Print a warning and continue to printf the |
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1277 * stack to the msgbuf |
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1278 */ |
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1279 printf("Warning: stack in the dump buffer" |
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1280 " may be incomplete\n"); |
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1281 offset = next_offset; |
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1282 } |
0 | 1283 } |
1284 | |
1285 pc = nextpc; | |
1286 fp = nextfp; | |
1287 } | |
1288 out: | |
1289 if (!panicstr) { | |
1290 printf("end of traceback\n"); | |
1291 DELAY(2 * MICROSEC); | |
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1292 } else if (dump_stack_scratch) { |
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1293 dump_stack_scratch[offset] = '\0'; |
0 | 1294 } |
1295 } | |
1296 | |
1297 #elif defined(__i386) | |
1298 | |
1299 void | |
1300 traceback(caddr_t fpreg) | |
1301 { | |
1302 struct frame *fp = (struct frame *)fpreg; | |
1303 struct frame *nextfp, *minfp, *stacktop; | |
1304 uintptr_t pc, nextpc; | |
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1305 uint_t offset = 0; |
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1306 uint_t next_offset = 0; |
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1307 char stack_buffer[1024]; |
0 | 1308 |
1309 cpu_t *cpu; | |
1310 | |
1311 /* | |
1312 * args[] holds TR_ARG_MAX hex long args, plus ", " or '\0'. | |
1313 */ | |
1314 char args[TR_ARG_MAX * 2 + 8], *p; | |
1315 | |
1316 int on_intr; | |
1317 ulong_t off; | |
1318 char *sym; | |
1319 | |
1320 if (!panicstr) | |
1321 printf("traceback: %%fp = %p\n", (void *)fp); | |
1322 | |
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1323 if (panicstr && !dump_stack_scratch) { |
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1324 printf("Warning - stack not written to the dumpbuf\n"); |
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1325 } |
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1326 |
0 | 1327 /* |
1328 * If we are panicking, all high-level interrupt information in | |
1329 * CPU was overwritten. panic_cpu has the correct values. | |
1330 */ | |
1331 kpreempt_disable(); /* prevent migration */ | |
1332 | |
1333 cpu = (panicstr && CPU->cpu_id == panic_cpu.cpu_id)? &panic_cpu : CPU; | |
1334 | |
1335 if ((on_intr = CPU_ON_INTR(cpu)) != 0) | |
1336 stacktop = (struct frame *)(cpu->cpu_intr_stack + SA(MINFRAME)); | |
1337 else | |
1338 stacktop = (struct frame *)curthread->t_stk; | |
1339 | |
1340 kpreempt_enable(); | |
1341 | |
5084 | 1342 fp = (struct frame *)plat_traceback(fpreg); |
0 | 1343 if ((uintptr_t)fp < KERNELBASE) |
1344 goto out; | |
1345 | |
1346 minfp = fp; /* Baseline minimum frame pointer */ | |
1347 pc = fp->fr_savpc; | |
1348 fp = (struct frame *)fp->fr_savfp; | |
1349 | |
1350 while ((uintptr_t)fp >= KERNELBASE) { | |
1351 ulong_t argc; | |
1352 long *argv; | |
1353 | |
1354 if (fp <= minfp || fp >= stacktop) { | |
1355 if (on_intr) { | |
1356 /* | |
1357 * Hop from interrupt stack to thread stack. | |
1358 */ | |
1359 stacktop = (struct frame *)curthread->t_stk; | |
1360 minfp = (struct frame *)curthread->t_stkbase; | |
1361 on_intr = 0; | |
1362 continue; | |
1363 } | |
1364 break; /* we're outside of the expected range */ | |
1365 } | |
1366 | |
1367 if ((uintptr_t)fp & (STACK_ALIGN - 1)) { | |
1368 printf(" >> mis-aligned %%fp = %p\n", (void *)fp); | |
1369 break; | |
1370 } | |
1371 | |
1372 nextpc = fp->fr_savpc; | |
1373 nextfp = (struct frame *)fp->fr_savfp; | |
1374 argc = argcount(nextpc); | |
1375 argv = (long *)((char *)fp + sizeof (struct frame)); | |
1376 | |
1377 args[0] = '\0'; | |
1378 p = args; | |
1379 while (argc-- > 0 && argv < (long *)stacktop) { | |
1380 p += snprintf(p, args + sizeof (args) - p, | |
1381 "%s%lx", (p == args) ? "" : ", ", *argv++); | |
1382 } | |
1383 | |
1384 if ((sym = kobj_getsymname(pc, &off)) != NULL) { | |
1385 printf("%08lx %s:%s+%lx (%s)\n", (uintptr_t)fp, | |
1386 mod_containing_pc((caddr_t)pc), sym, off, args); | |
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1387 (void) snprintf(stack_buffer, sizeof (stack_buffer), |
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1388 "%s:%s+%lx (%s) | ", |
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1389 mod_containing_pc((caddr_t)pc), sym, off, args); |
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1390 |
0 | 1391 } else { |
1392 printf("%08lx %lx (%s)\n", | |
1393 (uintptr_t)fp, pc, args); | |
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1394 (void) snprintf(stack_buffer, sizeof (stack_buffer), |
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1395 "%lx (%s) | ", pc, args); |
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1396 |
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1397 } |
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1398 |
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1399 if (panicstr && dump_stack_scratch) { |
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1400 next_offset = offset + strlen(stack_buffer); |
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1401 if (next_offset < STACK_BUF_SIZE) { |
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1402 bcopy(stack_buffer, dump_stack_scratch + offset, |
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1403 strlen(stack_buffer)); |
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1404 offset = next_offset; |
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1405 } else { |
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1406 /* |
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1407 * In attempting to save the panic stack |
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1408 * to the dumpbuf we have overflowed that area. |
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1409 * Print a warning and continue to printf the |
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1410 * stack to the msgbuf |
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1411 */ |
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1412 printf("Warning: stack in the dumpbuf" |
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1413 " may be incomplete\n"); |
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1414 offset = next_offset; |
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1415 } |
0 | 1416 } |
1417 | |
1418 minfp = fp; | |
1419 pc = nextpc; | |
1420 fp = nextfp; | |
1421 } | |
1422 out: | |
1423 if (!panicstr) { | |
1424 printf("end of traceback\n"); | |
1425 DELAY(2 * MICROSEC); | |
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1426 } else if (dump_stack_scratch) { |
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1427 dump_stack_scratch[offset] = '\0'; |
0 | 1428 } |
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1429 |
0 | 1430 } |
1431 | |
1432 #endif /* __i386 */ | |
1433 | |
1434 /* | |
1435 * Generate a stack backtrace from a saved register set. | |
1436 */ | |
1437 void | |
1438 traceregs(struct regs *rp) | |
1439 { | |
1440 traceback((caddr_t)rp->r_fp); | |
1441 } | |
1442 | |
1443 void | |
1444 exec_set_sp(size_t stksize) | |
1445 { | |
1446 klwp_t *lwp = ttolwp(curthread); | |
1447 | |
1448 lwptoregs(lwp)->r_sp = (uintptr_t)curproc->p_usrstack - stksize; | |
1449 } | |
1450 | |
1451 hrtime_t | |
1452 gethrtime_waitfree(void) | |
1453 { | |
1454 return (dtrace_gethrtime()); | |
1455 } | |
1456 | |
1457 hrtime_t | |
1458 gethrtime(void) | |
1459 { | |
1460 return (gethrtimef()); | |
1461 } | |
1462 | |
1463 hrtime_t | |
1464 gethrtime_unscaled(void) | |
1465 { | |
1466 return (gethrtimeunscaledf()); | |
1467 } | |
1468 | |
1469 void | |
1470 scalehrtime(hrtime_t *hrt) | |
1471 { | |
1472 scalehrtimef(hrt); | |
1473 } | |
1474 | |
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1475 uint64_t |
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1476 unscalehrtime(hrtime_t nsecs) |
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1477 { |
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1478 return (unscalehrtimef(nsecs)); |
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1479 } |
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1480 |
0 | 1481 void |
1482 gethrestime(timespec_t *tp) | |
1483 { | |
1484 gethrestimef(tp); | |
1485 } | |
1486 | |
1487 #if defined(__amd64) | |
1488 /* | |
1489 * Part of the implementation of hres_tick(); this routine is | |
1490 * easier in C than assembler .. called with the hres_lock held. | |
1491 * | |
1492 * XX64 Many of these timekeeping variables need to be extern'ed in a header | |
1493 */ | |
1494 | |
1495 #include <sys/time.h> | |
1496 #include <sys/machlock.h> | |
1497 | |
1498 extern int one_sec; | |
1499 extern int max_hres_adj; | |
1500 | |
1501 void | |
1502 __adj_hrestime(void) | |
1503 { | |
1504 long long adj; | |
1505 | |
1506 if (hrestime_adj == 0) | |
1507 adj = 0; | |
1508 else if (hrestime_adj > 0) { | |
1509 if (hrestime_adj < max_hres_adj) | |
1510 adj = hrestime_adj; | |
1511 else | |
1512 adj = max_hres_adj; | |
1513 } else { | |
1514 if (hrestime_adj < -max_hres_adj) | |
1515 adj = -max_hres_adj; | |
1516 else | |
1517 adj = hrestime_adj; | |
1518 } | |
1519 | |
1520 timedelta -= adj; | |
1521 hrestime_adj = timedelta; | |
1522 hrestime.tv_nsec += adj; | |
1523 | |
1524 while (hrestime.tv_nsec >= NANOSEC) { | |
1525 one_sec++; | |
1526 hrestime.tv_sec++; | |
1527 hrestime.tv_nsec -= NANOSEC; | |
1528 } | |
1529 } | |
1530 #endif | |
1531 | |
1532 /* | |
1533 * Wrapper functions to maintain backwards compability | |
1534 */ | |
1535 int | |
1536 xcopyin(const void *uaddr, void *kaddr, size_t count) | |
1537 { | |
1538 return (xcopyin_nta(uaddr, kaddr, count, UIO_COPY_CACHED)); | |
1539 } | |
1540 | |
1541 int | |
1542 xcopyout(const void *kaddr, void *uaddr, size_t count) | |
1543 { | |
1544 return (xcopyout_nta(kaddr, uaddr, count, UIO_COPY_CACHED)); | |
1545 } |