| 1 | /* $NetBSD: netbsd32_machdep.c,v 1.97 2016/10/19 09:44:00 skrll Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2001 Wasabi Systems, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Written by Frank van der Linden for Wasabi Systems, Inc. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. All advertising materials mentioning features or use of this software |
| 18 | * must display the following acknowledgement: |
| 19 | * This product includes software developed for the NetBSD Project by |
| 20 | * Wasabi Systems, Inc. |
| 21 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
| 22 | * or promote products derived from this software without specific prior |
| 23 | * written permission. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 27 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 28 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
| 29 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 35 | * POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
| 37 | |
| 38 | #include <sys/cdefs.h> |
| 39 | __KERNEL_RCSID(0, "$NetBSD: netbsd32_machdep.c,v 1.97 2016/10/19 09:44:00 skrll Exp $" ); |
| 40 | |
| 41 | #ifdef _KERNEL_OPT |
| 42 | #include "opt_compat_netbsd.h" |
| 43 | #include "opt_coredump.h" |
| 44 | #include "opt_execfmt.h" |
| 45 | #include "opt_user_ldt.h" |
| 46 | #include "opt_mtrr.h" |
| 47 | #endif |
| 48 | |
| 49 | #include <sys/param.h> |
| 50 | #include <sys/exec.h> |
| 51 | #include <sys/exec_aout.h> |
| 52 | #include <sys/kmem.h> |
| 53 | #include <sys/proc.h> |
| 54 | #include <sys/signalvar.h> |
| 55 | #include <sys/systm.h> |
| 56 | #include <sys/core.h> |
| 57 | #include <sys/mount.h> |
| 58 | #include <sys/buf.h> |
| 59 | #include <sys/vnode.h> |
| 60 | #include <sys/ras.h> |
| 61 | #include <sys/ptrace.h> |
| 62 | #include <sys/kauth.h> |
| 63 | |
| 64 | #include <x86/fpu.h> |
| 65 | #include <machine/frame.h> |
| 66 | #include <machine/reg.h> |
| 67 | #include <machine/vmparam.h> |
| 68 | #ifdef MTRR |
| 69 | #include <machine/mtrr.h> |
| 70 | #endif |
| 71 | #include <machine/netbsd32_machdep.h> |
| 72 | #include <machine/sysarch.h> |
| 73 | #include <machine/userret.h> |
| 74 | |
| 75 | #include <compat/netbsd32/netbsd32.h> |
| 76 | #include <compat/netbsd32/netbsd32_exec.h> |
| 77 | #include <compat/netbsd32/netbsd32_syscallargs.h> |
| 78 | |
| 79 | #include <compat/sys/signal.h> |
| 80 | #include <compat/sys/signalvar.h> |
| 81 | |
| 82 | /* Provide a the name of the architecture we're emulating */ |
| 83 | const char machine32[] = "i386" ; |
| 84 | const char machine_arch32[] = "i386" ; |
| 85 | |
| 86 | #ifdef MTRR |
| 87 | static int x86_64_get_mtrr32(struct lwp *, void *, register_t *); |
| 88 | static int x86_64_set_mtrr32(struct lwp *, void *, register_t *); |
| 89 | #else |
| 90 | #define x86_64_get_mtrr32(x, y, z) ENOSYS |
| 91 | #define x86_64_set_mtrr32(x, y, z) ENOSYS |
| 92 | #endif |
| 93 | |
| 94 | static int check_sigcontext32(struct lwp *, const struct netbsd32_sigcontext *); |
| 95 | |
| 96 | #ifdef EXEC_AOUT |
| 97 | /* |
| 98 | * There is no native a.out -- this function is required |
| 99 | * for i386 a.out emulation (COMPAT_NETBSD32+EXEC_AOUT). |
| 100 | */ |
| 101 | int |
| 102 | cpu_exec_aout_makecmds(struct lwp *p, struct exec_package *e) |
| 103 | { |
| 104 | |
| 105 | return ENOEXEC; |
| 106 | } |
| 107 | #endif |
| 108 | |
| 109 | void |
| 110 | netbsd32_setregs(struct lwp *l, struct exec_package *pack, vaddr_t stack) |
| 111 | { |
| 112 | struct pcb *pcb; |
| 113 | struct trapframe *tf; |
| 114 | struct proc *p = l->l_proc; |
| 115 | |
| 116 | pcb = lwp_getpcb(l); |
| 117 | |
| 118 | #if defined(USER_LDT) && 0 |
| 119 | pmap_ldt_cleanup(l); |
| 120 | #endif |
| 121 | |
| 122 | netbsd32_adjust_limits(p); |
| 123 | |
| 124 | l->l_md.md_flags |= MDL_COMPAT32; /* Force iret not sysret */ |
| 125 | pcb->pcb_flags = PCB_COMPAT32; |
| 126 | |
| 127 | fpu_save_area_clear(l, pack->ep_osversion >= 699002600 |
| 128 | ? __NetBSD_NPXCW__ : __NetBSD_COMPAT_NPXCW__); |
| 129 | |
| 130 | p->p_flag |= PK_32; |
| 131 | |
| 132 | tf = l->l_md.md_regs; |
| 133 | tf->tf_ds = LSEL(LUDATA32_SEL, SEL_UPL); |
| 134 | tf->tf_es = LSEL(LUDATA32_SEL, SEL_UPL); |
| 135 | cpu_fsgs_zero(l); |
| 136 | cpu_fsgs_reload(l, tf->tf_ds, tf->tf_es); |
| 137 | tf->tf_rdi = 0; |
| 138 | tf->tf_rsi = 0; |
| 139 | tf->tf_rbp = 0; |
| 140 | tf->tf_rbx = (uint32_t)p->p_psstrp; |
| 141 | tf->tf_rdx = 0; |
| 142 | tf->tf_rcx = 0; |
| 143 | tf->tf_rax = 0; |
| 144 | tf->tf_rip = pack->ep_entry; |
| 145 | tf->tf_cs = LSEL(LUCODE32_SEL, SEL_UPL); |
| 146 | tf->tf_rflags = PSL_USERSET; |
| 147 | tf->tf_rsp = stack; |
| 148 | tf->tf_ss = LSEL(LUDATA32_SEL, SEL_UPL); |
| 149 | } |
| 150 | |
| 151 | #ifdef COMPAT_16 |
| 152 | static void |
| 153 | netbsd32_sendsig_sigcontext(const ksiginfo_t *ksi, const sigset_t *mask) |
| 154 | { |
| 155 | struct lwp *l = curlwp; |
| 156 | struct proc *p = l->l_proc; |
| 157 | struct trapframe *tf; |
| 158 | int sig = ksi->ksi_signo; |
| 159 | sig_t catcher = SIGACTION(p, sig).sa_handler; |
| 160 | struct netbsd32_sigframe_sigcontext *fp, frame; |
| 161 | int onstack, error; |
| 162 | struct sigacts *ps = p->p_sigacts; |
| 163 | |
| 164 | tf = l->l_md.md_regs; |
| 165 | |
| 166 | /* Do we need to jump onto the signal stack? */ |
| 167 | onstack = |
| 168 | (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && |
| 169 | (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; |
| 170 | |
| 171 | /* Allocate space for the signal handler context. */ |
| 172 | if (onstack) |
| 173 | fp = (struct netbsd32_sigframe_sigcontext *) |
| 174 | ((char *)l->l_sigstk.ss_sp + l->l_sigstk.ss_size); |
| 175 | else |
| 176 | fp = (struct netbsd32_sigframe_sigcontext *)tf->tf_rsp; |
| 177 | fp--; |
| 178 | |
| 179 | /* Build stack frame for signal trampoline. */ |
| 180 | switch (ps->sa_sigdesc[sig].sd_vers) { |
| 181 | case 0: |
| 182 | frame.sf_ra = (uint32_t)(u_long)p->p_sigctx.ps_sigcode; |
| 183 | break; |
| 184 | case 1: |
| 185 | frame.sf_ra = (uint32_t)(u_long)ps->sa_sigdesc[sig].sd_tramp; |
| 186 | break; |
| 187 | default: |
| 188 | /* Don't know what trampoline version; kill it. */ |
| 189 | sigexit(l, SIGILL); |
| 190 | } |
| 191 | frame.sf_signum = sig; |
| 192 | frame.sf_code = ksi->ksi_trap; |
| 193 | frame.sf_scp = (uint32_t)(u_long)&fp->sf_sc; |
| 194 | |
| 195 | frame.sf_sc.sc_ds = tf->tf_ds; |
| 196 | frame.sf_sc.sc_es = tf->tf_es; |
| 197 | frame.sf_sc.sc_fs = tf->tf_fs; |
| 198 | frame.sf_sc.sc_gs = tf->tf_gs; |
| 199 | |
| 200 | frame.sf_sc.sc_eflags = tf->tf_rflags; |
| 201 | frame.sf_sc.sc_edi = tf->tf_rdi; |
| 202 | frame.sf_sc.sc_esi = tf->tf_rsi; |
| 203 | frame.sf_sc.sc_ebp = tf->tf_rbp; |
| 204 | frame.sf_sc.sc_ebx = tf->tf_rbx; |
| 205 | frame.sf_sc.sc_edx = tf->tf_rdx; |
| 206 | frame.sf_sc.sc_ecx = tf->tf_rcx; |
| 207 | frame.sf_sc.sc_eax = tf->tf_rax; |
| 208 | frame.sf_sc.sc_eip = tf->tf_rip; |
| 209 | frame.sf_sc.sc_cs = tf->tf_cs; |
| 210 | frame.sf_sc.sc_esp = tf->tf_rsp; |
| 211 | frame.sf_sc.sc_ss = tf->tf_ss; |
| 212 | frame.sf_sc.sc_trapno = tf->tf_trapno; |
| 213 | frame.sf_sc.sc_err = tf->tf_err; |
| 214 | |
| 215 | /* Save signal stack. */ |
| 216 | frame.sf_sc.sc_onstack = l->l_sigstk.ss_flags & SS_ONSTACK; |
| 217 | |
| 218 | /* Save signal mask. */ |
| 219 | frame.sf_sc.sc_mask = *mask; |
| 220 | |
| 221 | sendsig_reset(l, sig); |
| 222 | |
| 223 | mutex_exit(p->p_lock); |
| 224 | error = copyout(&frame, fp, sizeof(frame)); |
| 225 | mutex_enter(p->p_lock); |
| 226 | |
| 227 | if (error != 0) { |
| 228 | /* |
| 229 | * Process has trashed its stack; give it an illegal |
| 230 | * instruction to halt it in its tracks. |
| 231 | */ |
| 232 | sigexit(l, SIGILL); |
| 233 | /* NOTREACHED */ |
| 234 | } |
| 235 | |
| 236 | /* |
| 237 | * Build context to run handler in. |
| 238 | */ |
| 239 | tf->tf_ds = GSEL(GUDATA32_SEL, SEL_UPL); |
| 240 | tf->tf_es = GSEL(GUDATA32_SEL, SEL_UPL); |
| 241 | tf->tf_fs = GSEL(GUDATA32_SEL, SEL_UPL); |
| 242 | tf->tf_gs = GSEL(GUDATA32_SEL, SEL_UPL); |
| 243 | |
| 244 | /* Ensure FP state is sane. */ |
| 245 | fpu_save_area_reset(l); |
| 246 | |
| 247 | tf->tf_rip = (uint64_t)catcher; |
| 248 | tf->tf_cs = GSEL(GUCODE32_SEL, SEL_UPL); |
| 249 | tf->tf_rflags &= ~PSL_CLEARSIG; |
| 250 | tf->tf_rsp = (uint64_t)fp; |
| 251 | tf->tf_ss = GSEL(GUDATA32_SEL, SEL_UPL); |
| 252 | |
| 253 | /* Remember that we're now on the signal stack. */ |
| 254 | if (onstack) |
| 255 | l->l_sigstk.ss_flags |= SS_ONSTACK; |
| 256 | if ((vaddr_t)catcher >= VM_MAXUSER_ADDRESS32) { |
| 257 | /* |
| 258 | * process has given an invalid address for the |
| 259 | * handler. Stop it, but do not do it before so |
| 260 | * we can return the right info to userland (or in core dump) |
| 261 | */ |
| 262 | sigexit(l, SIGILL); |
| 263 | /* NOTREACHED */ |
| 264 | } |
| 265 | } |
| 266 | #endif |
| 267 | |
| 268 | static void |
| 269 | netbsd32_sendsig_siginfo(const ksiginfo_t *ksi, const sigset_t *mask) |
| 270 | { |
| 271 | struct lwp *l = curlwp; |
| 272 | struct proc *p = l->l_proc; |
| 273 | struct sigacts *ps = p->p_sigacts; |
| 274 | int onstack, error; |
| 275 | int sig = ksi->ksi_signo; |
| 276 | struct netbsd32_sigframe_siginfo *fp, frame; |
| 277 | sig_t catcher = SIGACTION(p, sig).sa_handler; |
| 278 | struct trapframe *tf = l->l_md.md_regs; |
| 279 | |
| 280 | /* Do we need to jump onto the signal stack? */ |
| 281 | onstack = |
| 282 | (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && |
| 283 | (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; |
| 284 | |
| 285 | /* Allocate space for the signal handler context. */ |
| 286 | if (onstack) |
| 287 | fp = (struct netbsd32_sigframe_siginfo *) |
| 288 | ((char *)l->l_sigstk.ss_sp + l->l_sigstk.ss_size); |
| 289 | else |
| 290 | fp = (struct netbsd32_sigframe_siginfo *)tf->tf_rsp; |
| 291 | |
| 292 | fp--; |
| 293 | |
| 294 | /* Build stack frame for signal trampoline. */ |
| 295 | switch (ps->sa_sigdesc[sig].sd_vers) { |
| 296 | case 0: /* handled by sendsig_sigcontext */ |
| 297 | case 1: /* handled by sendsig_sigcontext */ |
| 298 | default: /* unknown version */ |
| 299 | printf("nsendsig: bad version %d\n" , |
| 300 | ps->sa_sigdesc[sig].sd_vers); |
| 301 | sigexit(l, SIGILL); |
| 302 | case 2: |
| 303 | break; |
| 304 | } |
| 305 | |
| 306 | frame.sf_ra = (uint32_t)(uintptr_t)ps->sa_sigdesc[sig].sd_tramp; |
| 307 | frame.sf_signum = sig; |
| 308 | frame.sf_sip = (uint32_t)(uintptr_t)&fp->sf_si; |
| 309 | frame.sf_ucp = (uint32_t)(uintptr_t)&fp->sf_uc; |
| 310 | netbsd32_si_to_si32(&frame.sf_si, (const siginfo_t *)&ksi->ksi_info); |
| 311 | frame.sf_uc.uc_flags = _UC_SIGMASK; |
| 312 | frame.sf_uc.uc_sigmask = *mask; |
| 313 | frame.sf_uc.uc_link = (uint32_t)(uintptr_t)l->l_ctxlink; |
| 314 | frame.sf_uc.uc_flags |= (l->l_sigstk.ss_flags & SS_ONSTACK) |
| 315 | ? _UC_SETSTACK : _UC_CLRSTACK; |
| 316 | memset(&frame.sf_uc.uc_stack, 0, sizeof(frame.sf_uc.uc_stack)); |
| 317 | sendsig_reset(l, sig); |
| 318 | |
| 319 | mutex_exit(p->p_lock); |
| 320 | cpu_getmcontext32(l, &frame.sf_uc.uc_mcontext, &frame.sf_uc.uc_flags); |
| 321 | error = copyout(&frame, fp, sizeof(frame)); |
| 322 | mutex_enter(p->p_lock); |
| 323 | |
| 324 | if (error != 0) { |
| 325 | /* |
| 326 | * Process has trashed its stack; give it an illegal |
| 327 | * instruction to halt it in its tracks. |
| 328 | */ |
| 329 | sigexit(l, SIGILL); |
| 330 | /* NOTREACHED */ |
| 331 | } |
| 332 | |
| 333 | /* |
| 334 | * Build context to run handler in. |
| 335 | */ |
| 336 | tf->tf_ds = GSEL(GUDATA32_SEL, SEL_UPL); |
| 337 | tf->tf_es = GSEL(GUDATA32_SEL, SEL_UPL); |
| 338 | tf->tf_fs = GSEL(GUDATA32_SEL, SEL_UPL); |
| 339 | tf->tf_gs = GSEL(GUDATA32_SEL, SEL_UPL); |
| 340 | |
| 341 | tf->tf_rip = (uint64_t)catcher; |
| 342 | tf->tf_cs = GSEL(GUCODE32_SEL, SEL_UPL); |
| 343 | tf->tf_rflags &= ~PSL_CLEARSIG; |
| 344 | tf->tf_rsp = (uint64_t)fp; |
| 345 | tf->tf_ss = GSEL(GUDATA32_SEL, SEL_UPL); |
| 346 | |
| 347 | /* Ensure FP state is sane. */ |
| 348 | fpu_save_area_reset(l); |
| 349 | |
| 350 | /* Remember that we're now on the signal stack. */ |
| 351 | if (onstack) |
| 352 | l->l_sigstk.ss_flags |= SS_ONSTACK; |
| 353 | if ((vaddr_t)catcher >= VM_MAXUSER_ADDRESS32) { |
| 354 | /* |
| 355 | * process has given an invalid address for the |
| 356 | * handler. Stop it, but do not do it before so |
| 357 | * we can return the right info to userland (or in core dump) |
| 358 | */ |
| 359 | sigexit(l, SIGILL); |
| 360 | /* NOTREACHED */ |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | void |
| 365 | netbsd32_sendsig(const ksiginfo_t *ksi, const sigset_t *mask) |
| 366 | { |
| 367 | #ifdef COMPAT_16 |
| 368 | if (curproc->p_sigacts->sa_sigdesc[ksi->ksi_signo].sd_vers < 2) |
| 369 | netbsd32_sendsig_sigcontext(ksi, mask); |
| 370 | else |
| 371 | #endif |
| 372 | netbsd32_sendsig_siginfo(ksi, mask); |
| 373 | } |
| 374 | |
| 375 | int |
| 376 | compat_16_netbsd32___sigreturn14(struct lwp *l, const struct compat_16_netbsd32___sigreturn14_args *uap, register_t *retval) |
| 377 | { |
| 378 | /* { |
| 379 | syscallarg(netbsd32_sigcontextp_t) sigcntxp; |
| 380 | } */ |
| 381 | struct netbsd32_sigcontext *scp, context; |
| 382 | struct proc *p = l->l_proc; |
| 383 | struct trapframe *tf; |
| 384 | int error; |
| 385 | |
| 386 | /* |
| 387 | * The trampoline code hands us the context. |
| 388 | * It is unsafe to keep track of it ourselves, in the event that a |
| 389 | * program jumps out of a signal handler. |
| 390 | */ |
| 391 | scp = NETBSD32PTR64(SCARG(uap, sigcntxp)); |
| 392 | if (copyin(scp, &context, sizeof(*scp)) != 0) |
| 393 | return (EFAULT); |
| 394 | |
| 395 | /* |
| 396 | * Check for security violations. |
| 397 | */ |
| 398 | error = check_sigcontext32(l, &context); |
| 399 | if (error != 0) |
| 400 | return error; |
| 401 | |
| 402 | /* Restore register context. */ |
| 403 | tf = l->l_md.md_regs; |
| 404 | tf->tf_ds = context.sc_ds; |
| 405 | tf->tf_es = context.sc_es; |
| 406 | cpu_fsgs_reload(l, context.sc_fs, context.sc_gs); |
| 407 | tf->tf_rflags = context.sc_eflags; |
| 408 | tf->tf_rdi = context.sc_edi; |
| 409 | tf->tf_rsi = context.sc_esi; |
| 410 | tf->tf_rbp = context.sc_ebp; |
| 411 | tf->tf_rbx = context.sc_ebx; |
| 412 | tf->tf_rdx = context.sc_edx; |
| 413 | tf->tf_rcx = context.sc_ecx; |
| 414 | tf->tf_rax = context.sc_eax; |
| 415 | |
| 416 | tf->tf_rip = context.sc_eip; |
| 417 | tf->tf_cs = context.sc_cs; |
| 418 | tf->tf_rsp = context.sc_esp; |
| 419 | tf->tf_ss = context.sc_ss; |
| 420 | |
| 421 | mutex_enter(p->p_lock); |
| 422 | /* Restore signal stack. */ |
| 423 | if (context.sc_onstack & SS_ONSTACK) |
| 424 | l->l_sigstk.ss_flags |= SS_ONSTACK; |
| 425 | else |
| 426 | l->l_sigstk.ss_flags &= ~SS_ONSTACK; |
| 427 | /* Restore signal mask. */ |
| 428 | (void) sigprocmask1(l, SIG_SETMASK, &context.sc_mask, 0); |
| 429 | mutex_exit(p->p_lock); |
| 430 | |
| 431 | return (EJUSTRETURN); |
| 432 | } |
| 433 | |
| 434 | |
| 435 | #ifdef COREDUMP |
| 436 | /* |
| 437 | * Dump the machine specific segment at the start of a core dump. |
| 438 | */ |
| 439 | struct md_core32 { |
| 440 | struct reg32 intreg; |
| 441 | struct fpreg32 freg; |
| 442 | }; |
| 443 | |
| 444 | int |
| 445 | cpu_coredump32(struct lwp *l, struct coredump_iostate *iocookie, |
| 446 | struct core32 *chdr) |
| 447 | { |
| 448 | struct md_core32 md_core; |
| 449 | struct coreseg cseg; |
| 450 | int error; |
| 451 | |
| 452 | if (iocookie == NULL) { |
| 453 | CORE_SETMAGIC(*chdr, COREMAGIC, MID_I386, 0); |
| 454 | chdr->c_hdrsize = ALIGN32(sizeof(*chdr)); |
| 455 | chdr->c_seghdrsize = ALIGN32(sizeof(cseg)); |
| 456 | chdr->c_cpusize = sizeof(md_core); |
| 457 | chdr->c_nseg++; |
| 458 | return 0; |
| 459 | } |
| 460 | |
| 461 | /* Save integer registers. */ |
| 462 | error = netbsd32_process_read_regs(l, &md_core.intreg); |
| 463 | if (error) |
| 464 | return error; |
| 465 | |
| 466 | /* Save floating point registers. */ |
| 467 | error = netbsd32_process_read_fpregs(l, &md_core.freg, NULL); |
| 468 | if (error) |
| 469 | return error; |
| 470 | |
| 471 | CORE_SETMAGIC(cseg, CORESEGMAGIC, MID_I386, CORE_CPU); |
| 472 | cseg.c_addr = 0; |
| 473 | cseg.c_size = chdr->c_cpusize; |
| 474 | |
| 475 | error = coredump_write(iocookie, UIO_SYSSPACE, &cseg, |
| 476 | chdr->c_seghdrsize); |
| 477 | if (error) |
| 478 | return error; |
| 479 | |
| 480 | return coredump_write(iocookie, UIO_SYSSPACE, &md_core, |
| 481 | sizeof(md_core)); |
| 482 | } |
| 483 | #endif |
| 484 | |
| 485 | int |
| 486 | netbsd32_process_read_regs(struct lwp *l, struct reg32 *regs) |
| 487 | { |
| 488 | struct trapframe *tf = l->l_md.md_regs; |
| 489 | |
| 490 | /* XXX avoid sign extension problems with unknown upper bits? */ |
| 491 | regs->r_gs = tf->tf_gs & 0xffff; |
| 492 | regs->r_fs = tf->tf_fs & 0xffff; |
| 493 | regs->r_es = tf->tf_es & 0xffff; |
| 494 | regs->r_ds = tf->tf_ds & 0xffff; |
| 495 | regs->r_eflags = tf->tf_rflags; |
| 496 | regs->r_edi = tf->tf_rdi & 0xffffffff; |
| 497 | regs->r_esi = tf->tf_rsi & 0xffffffff; |
| 498 | regs->r_ebp = tf->tf_rbp & 0xffffffff; |
| 499 | regs->r_ebx = tf->tf_rbx & 0xffffffff; |
| 500 | regs->r_edx = tf->tf_rdx & 0xffffffff; |
| 501 | regs->r_ecx = tf->tf_rcx & 0xffffffff; |
| 502 | regs->r_eax = tf->tf_rax & 0xffffffff; |
| 503 | regs->r_eip = tf->tf_rip & 0xffffffff; |
| 504 | regs->r_cs = tf->tf_cs & 0xffff; |
| 505 | regs->r_esp = tf->tf_rsp & 0xffffffff; |
| 506 | regs->r_ss = tf->tf_ss & 0xffff; |
| 507 | |
| 508 | return (0); |
| 509 | } |
| 510 | |
| 511 | int |
| 512 | netbsd32_process_read_fpregs(struct lwp *l, struct fpreg32 *regs, size_t *sz) |
| 513 | { |
| 514 | |
| 515 | __CTASSERT(sizeof *regs == sizeof (struct save87)); |
| 516 | process_read_fpregs_s87(l, (struct save87 *)regs); |
| 517 | return 0; |
| 518 | } |
| 519 | |
| 520 | int |
| 521 | netbsd32_process_write_regs(struct lwp *l, const struct reg32 *regs) |
| 522 | { |
| 523 | struct trapframe *tf = l->l_md.md_regs; |
| 524 | |
| 525 | /* |
| 526 | * Check for security violations. Taken from i386/process_machdep.c. |
| 527 | */ |
| 528 | if (((regs->r_eflags ^ tf->tf_rflags) & PSL_USERSTATIC) != 0 || |
| 529 | !VALID_USER_CSEL32(regs->r_cs)) |
| 530 | return EINVAL; |
| 531 | |
| 532 | tf->tf_rax = regs->r_eax; |
| 533 | tf->tf_rcx = regs->r_ecx; |
| 534 | tf->tf_rdx = regs->r_edx; |
| 535 | tf->tf_rbx = regs->r_ebx; |
| 536 | tf->tf_rsp = regs->r_esp; |
| 537 | tf->tf_rbp = regs->r_ebp; |
| 538 | tf->tf_rsi = regs->r_esi; |
| 539 | tf->tf_rdi = regs->r_edi; |
| 540 | tf->tf_rip = regs->r_eip; |
| 541 | tf->tf_rflags = regs->r_eflags; |
| 542 | tf->tf_cs = regs->r_cs; |
| 543 | tf->tf_ss = regs->r_ss; |
| 544 | tf->tf_ds = regs->r_ds; |
| 545 | tf->tf_es = regs->r_es; |
| 546 | tf->tf_fs = regs->r_fs; |
| 547 | tf->tf_gs = regs->r_gs; |
| 548 | |
| 549 | return 0; |
| 550 | } |
| 551 | |
| 552 | int |
| 553 | netbsd32_process_write_fpregs(struct lwp *l, const struct fpreg32 *regs, |
| 554 | size_t sz) |
| 555 | { |
| 556 | |
| 557 | __CTASSERT(sizeof *regs == sizeof (struct save87)); |
| 558 | process_write_fpregs_s87(l, (const struct save87 *)regs); |
| 559 | return 0; |
| 560 | } |
| 561 | |
| 562 | int |
| 563 | netbsd32_sysarch(struct lwp *l, const struct netbsd32_sysarch_args *uap, register_t *retval) |
| 564 | { |
| 565 | /* { |
| 566 | syscallarg(int) op; |
| 567 | syscallarg(netbsd32_voidp) parms; |
| 568 | } */ |
| 569 | int error; |
| 570 | |
| 571 | switch (SCARG(uap, op)) { |
| 572 | case X86_IOPL: |
| 573 | error = x86_iopl(l, |
| 574 | NETBSD32PTR64(SCARG(uap, parms)), retval); |
| 575 | break; |
| 576 | case X86_GET_MTRR: |
| 577 | error = x86_64_get_mtrr32(l, |
| 578 | NETBSD32PTR64(SCARG(uap, parms)), retval); |
| 579 | break; |
| 580 | case X86_SET_MTRR: |
| 581 | error = x86_64_set_mtrr32(l, |
| 582 | NETBSD32PTR64(SCARG(uap, parms)), retval); |
| 583 | break; |
| 584 | default: |
| 585 | error = EINVAL; |
| 586 | break; |
| 587 | } |
| 588 | return error; |
| 589 | } |
| 590 | |
| 591 | #ifdef MTRR |
| 592 | static int |
| 593 | x86_64_get_mtrr32(struct lwp *l, void *args, register_t *retval) |
| 594 | { |
| 595 | struct x86_64_get_mtrr_args32 args32; |
| 596 | int error, i; |
| 597 | int32_t n; |
| 598 | struct mtrr32 *m32p, m32; |
| 599 | struct mtrr *m64p, *mp; |
| 600 | size_t size; |
| 601 | |
| 602 | m64p = NULL; |
| 603 | |
| 604 | if (mtrr_funcs == NULL) |
| 605 | return ENOSYS; |
| 606 | |
| 607 | error = kauth_authorize_machdep(l->l_cred, KAUTH_MACHDEP_MTRR_GET, |
| 608 | NULL, NULL, NULL, NULL); |
| 609 | if (error) |
| 610 | return (error); |
| 611 | |
| 612 | error = copyin(args, &args32, sizeof args32); |
| 613 | if (error != 0) |
| 614 | return error; |
| 615 | |
| 616 | if (args32.mtrrp == 0) { |
| 617 | n = (MTRR_I686_NFIXED_SOFT + MTRR_I686_NVAR_MAX); |
| 618 | return copyout(&n, (void *)(uintptr_t)args32.n, sizeof n); |
| 619 | } |
| 620 | |
| 621 | error = copyin((void *)(uintptr_t)args32.n, &n, sizeof n); |
| 622 | if (error != 0) |
| 623 | return error; |
| 624 | |
| 625 | if (n <= 0 || n > (MTRR_I686_NFIXED_SOFT + MTRR_I686_NVAR_MAX)) |
| 626 | return EINVAL; |
| 627 | |
| 628 | size = n * sizeof(struct mtrr); |
| 629 | m64p = kmem_zalloc(size, KM_SLEEP); |
| 630 | if (m64p == NULL) { |
| 631 | error = ENOMEM; |
| 632 | goto fail; |
| 633 | } |
| 634 | error = mtrr_get(m64p, &n, l->l_proc, 0); |
| 635 | if (error != 0) |
| 636 | goto fail; |
| 637 | m32p = (struct mtrr32 *)(uintptr_t)args32.mtrrp; |
| 638 | mp = m64p; |
| 639 | for (i = 0; i < n; i++) { |
| 640 | m32.base = mp->base; |
| 641 | m32.len = mp->len; |
| 642 | m32.type = mp->type; |
| 643 | m32.flags = mp->flags; |
| 644 | m32.owner = mp->owner; |
| 645 | error = copyout(&m32, m32p, sizeof m32); |
| 646 | if (error != 0) |
| 647 | break; |
| 648 | mp++; |
| 649 | m32p++; |
| 650 | } |
| 651 | fail: |
| 652 | if (m64p != NULL) |
| 653 | kmem_free(m64p, size); |
| 654 | if (error != 0) |
| 655 | n = 0; |
| 656 | copyout(&n, (void *)(uintptr_t)args32.n, sizeof n); |
| 657 | return error; |
| 658 | } |
| 659 | |
| 660 | static int |
| 661 | x86_64_set_mtrr32(struct lwp *l, void *args, register_t *retval) |
| 662 | { |
| 663 | struct x86_64_set_mtrr_args32 args32; |
| 664 | struct mtrr32 *m32p, m32; |
| 665 | struct mtrr *m64p, *mp; |
| 666 | int error, i; |
| 667 | int32_t n; |
| 668 | size_t size; |
| 669 | |
| 670 | m64p = NULL; |
| 671 | |
| 672 | if (mtrr_funcs == NULL) |
| 673 | return ENOSYS; |
| 674 | |
| 675 | error = kauth_authorize_machdep(l->l_cred, KAUTH_MACHDEP_MTRR_SET, |
| 676 | NULL, NULL, NULL, NULL); |
| 677 | if (error) |
| 678 | return (error); |
| 679 | |
| 680 | error = copyin(args, &args32, sizeof args32); |
| 681 | if (error != 0) |
| 682 | return error; |
| 683 | |
| 684 | error = copyin((void *)(uintptr_t)args32.n, &n, sizeof n); |
| 685 | if (error != 0) |
| 686 | return error; |
| 687 | |
| 688 | if (n <= 0 || n > (MTRR_I686_NFIXED_SOFT + MTRR_I686_NVAR_MAX)) { |
| 689 | error = EINVAL; |
| 690 | goto fail; |
| 691 | } |
| 692 | |
| 693 | size = n * sizeof(struct mtrr); |
| 694 | m64p = kmem_zalloc(size, KM_SLEEP); |
| 695 | if (m64p == NULL) { |
| 696 | error = ENOMEM; |
| 697 | goto fail; |
| 698 | } |
| 699 | m32p = (struct mtrr32 *)(uintptr_t)args32.mtrrp; |
| 700 | mp = m64p; |
| 701 | for (i = 0; i < n; i++) { |
| 702 | error = copyin(m32p, &m32, sizeof m32); |
| 703 | if (error != 0) |
| 704 | goto fail; |
| 705 | mp->base = m32.base; |
| 706 | mp->len = m32.len; |
| 707 | mp->type = m32.type; |
| 708 | mp->flags = m32.flags; |
| 709 | mp->owner = m32.owner; |
| 710 | m32p++; |
| 711 | mp++; |
| 712 | } |
| 713 | |
| 714 | error = mtrr_set(m64p, &n, l->l_proc, 0); |
| 715 | fail: |
| 716 | if (m64p != NULL) |
| 717 | kmem_free(m64p, size); |
| 718 | if (error != 0) |
| 719 | n = 0; |
| 720 | copyout(&n, (void *)(uintptr_t)args32.n, sizeof n); |
| 721 | return error; |
| 722 | } |
| 723 | #endif |
| 724 | |
| 725 | #if 0 |
| 726 | void |
| 727 | netbsd32_mcontext_to_mcontext32(mcontext32_t *m32, mcontext_t *m, int flags) |
| 728 | { |
| 729 | if ((flags & _UC_CPU) != 0) { |
| 730 | m32->__gregs[_REG32_GS] = m->__gregs[_REG_GS] & 0xffffffff; |
| 731 | m32->__gregs[_REG32_FS] = m->__gregs[_REG_FS] & 0xffffffff; |
| 732 | m32->__gregs[_REG32_ES] = m->__gregs[_REG_ES] & 0xffffffff; |
| 733 | m32->__gregs[_REG32_DS] = m->__gregs[_REG_DS] & 0xffffffff; |
| 734 | m32->__gregs[_REG32_EDI] = m->__gregs[_REG_RDI] & 0xffffffff; |
| 735 | m32->__gregs[_REG32_ESI] = m->__gregs[_REG_RSI] & 0xffffffff; |
| 736 | m32->__gregs[_REG32_EBP] = m->__gregs[_REG_RBP] & 0xffffffff; |
| 737 | m32->__gregs[_REG32_ESP] = m->__gregs[_REG_URSP] & 0xffffffff; |
| 738 | m32->__gregs[_REG32_EBX] = m->__gregs[_REG_RBX] & 0xffffffff; |
| 739 | m32->__gregs[_REG32_EDX] = m->__gregs[_REG_RDX] & 0xffffffff; |
| 740 | m32->__gregs[_REG32_ECX] = m->__gregs[_REG_RCX] & 0xffffffff; |
| 741 | m32->__gregs[_REG32_EAX] = m->__gregs[_REG_RAX] & 0xffffffff; |
| 742 | m32->__gregs[_REG32_TRAPNO] = |
| 743 | m->__gregs[_REG_TRAPNO] & 0xffffffff; |
| 744 | m32->__gregs[_REG32_ERR] = m->__gregs[_REG_ERR] & 0xffffffff; |
| 745 | m32->__gregs[_REG32_EIP] = m->__gregs[_REG_RIP] & 0xffffffff; |
| 746 | m32->__gregs[_REG32_CS] = m->__gregs[_REG_CS] & 0xffffffff; |
| 747 | m32->__gregs[_REG32_EFL] = m->__gregs[_REG_RFL] & 0xffffffff; |
| 748 | m32->__gregs[_REG32_UESP] = m->__gregs[_REG_URSP] & 0xffffffff; |
| 749 | m32->__gregs[_REG32_SS] = m->__gregs[_REG_SS] & 0xffffffff; |
| 750 | } |
| 751 | if ((flags & _UC_FPU) != 0) |
| 752 | memcpy(&m32->__fpregs, &m->__fpregs, sizeof (m32->__fpregs)); |
| 753 | } |
| 754 | |
| 755 | void |
| 756 | netbsd32_mcontext32_to_mcontext(mcontext_t *m, mcontext32_t *m32, int flags) |
| 757 | { |
| 758 | if ((flags & _UC_CPU) != 0) { |
| 759 | m->__gregs[_REG_GS] = m32->__gregs[_REG32_GS]; |
| 760 | m->__gregs[_REG_FS] = m32->__gregs[_REG32_FS]; |
| 761 | m->__gregs[_REG_ES] = m32->__gregs[_REG32_ES]; |
| 762 | m->__gregs[_REG_DS] = m32->__gregs[_REG32_DS]; |
| 763 | m->__gregs[_REG_RDI] = m32->__gregs[_REG32_EDI]; |
| 764 | m->__gregs[_REG_RSI] = m32->__gregs[_REG32_ESI]; |
| 765 | m->__gregs[_REG_RBP] = m32->__gregs[_REG32_EBP]; |
| 766 | m->__gregs[_REG_URSP] = m32->__gregs[_REG32_ESP]; |
| 767 | m->__gregs[_REG_RBX] = m32->__gregs[_REG32_EBX]; |
| 768 | m->__gregs[_REG_RDX] = m32->__gregs[_REG32_EDX]; |
| 769 | m->__gregs[_REG_RCX] = m32->__gregs[_REG32_ECX]; |
| 770 | m->__gregs[_REG_RAX] = m32->__gregs[_REG32_EAX]; |
| 771 | m->__gregs[_REG_TRAPNO] = m32->__gregs[_REG32_TRAPNO]; |
| 772 | m->__gregs[_REG_ERR] = m32->__gregs[_REG32_ERR]; |
| 773 | m->__gregs[_REG_RIP] = m32->__gregs[_REG32_EIP]; |
| 774 | m->__gregs[_REG_CS] = m32->__gregs[_REG32_CS]; |
| 775 | m->__gregs[_REG_RFL] = m32->__gregs[_REG32_EFL]; |
| 776 | m->__gregs[_REG_URSP] = m32->__gregs[_REG32_UESP]; |
| 777 | m->__gregs[_REG_SS] = m32->__gregs[_REG32_SS]; |
| 778 | } |
| 779 | if (flags & _UC_FPU) |
| 780 | memcpy(&m->__fpregs, &m32->__fpregs, sizeof (m->__fpregs)); |
| 781 | } |
| 782 | #endif |
| 783 | |
| 784 | |
| 785 | int |
| 786 | cpu_setmcontext32(struct lwp *l, const mcontext32_t *mcp, unsigned int flags) |
| 787 | { |
| 788 | struct trapframe *tf = l->l_md.md_regs; |
| 789 | const __greg32_t *gr = mcp->__gregs; |
| 790 | struct proc *p = l->l_proc; |
| 791 | int error; |
| 792 | |
| 793 | /* Restore register context, if any. */ |
| 794 | if ((flags & _UC_CPU) != 0) { |
| 795 | /* |
| 796 | * Check for security violations. |
| 797 | */ |
| 798 | error = cpu_mcontext32_validate(l, mcp); |
| 799 | if (error != 0) |
| 800 | return error; |
| 801 | |
| 802 | cpu_fsgs_reload(l, gr[_REG32_FS], gr[_REG32_GS]); |
| 803 | tf->tf_es = gr[_REG32_ES]; |
| 804 | tf->tf_ds = gr[_REG32_DS]; |
| 805 | /* Only change the user-alterable part of eflags */ |
| 806 | tf->tf_rflags &= ~PSL_USER; |
| 807 | tf->tf_rflags |= (gr[_REG32_EFL] & PSL_USER); |
| 808 | tf->tf_rdi = gr[_REG32_EDI]; |
| 809 | tf->tf_rsi = gr[_REG32_ESI]; |
| 810 | tf->tf_rbp = gr[_REG32_EBP]; |
| 811 | tf->tf_rbx = gr[_REG32_EBX]; |
| 812 | tf->tf_rdx = gr[_REG32_EDX]; |
| 813 | tf->tf_rcx = gr[_REG32_ECX]; |
| 814 | tf->tf_rax = gr[_REG32_EAX]; |
| 815 | tf->tf_rip = gr[_REG32_EIP]; |
| 816 | tf->tf_cs = gr[_REG32_CS]; |
| 817 | tf->tf_rsp = gr[_REG32_UESP]; |
| 818 | tf->tf_ss = gr[_REG32_SS]; |
| 819 | } |
| 820 | |
| 821 | if ((flags & _UC_TLSBASE) != 0) |
| 822 | lwp_setprivate(l, (void *)(uintptr_t)mcp->_mc_tlsbase); |
| 823 | |
| 824 | /* Restore floating point register context, if any. */ |
| 825 | if ((flags & _UC_FPU) != 0) { |
| 826 | /* Assume fxsave context */ |
| 827 | process_write_fpregs_xmm(l, (const struct fxsave *) |
| 828 | &mcp->__fpregs.__fp_reg_set.__fp_xmm_state); |
| 829 | } |
| 830 | |
| 831 | mutex_enter(p->p_lock); |
| 832 | if (flags & _UC_SETSTACK) |
| 833 | l->l_sigstk.ss_flags |= SS_ONSTACK; |
| 834 | if (flags & _UC_CLRSTACK) |
| 835 | l->l_sigstk.ss_flags &= ~SS_ONSTACK; |
| 836 | mutex_exit(p->p_lock); |
| 837 | |
| 838 | return (0); |
| 839 | } |
| 840 | |
| 841 | void |
| 842 | cpu_getmcontext32(struct lwp *l, mcontext32_t *mcp, unsigned int *flags) |
| 843 | { |
| 844 | const struct trapframe *tf = l->l_md.md_regs; |
| 845 | __greg32_t *gr = mcp->__gregs; |
| 846 | __greg32_t ras_eip; |
| 847 | |
| 848 | /* Save register context. */ |
| 849 | gr[_REG32_GS] = tf->tf_gs; |
| 850 | gr[_REG32_FS] = tf->tf_fs; |
| 851 | gr[_REG32_ES] = tf->tf_es; |
| 852 | gr[_REG32_DS] = tf->tf_ds; |
| 853 | gr[_REG32_EFL] = tf->tf_rflags; |
| 854 | gr[_REG32_EDI] = tf->tf_rdi; |
| 855 | gr[_REG32_ESI] = tf->tf_rsi; |
| 856 | gr[_REG32_EBP] = tf->tf_rbp; |
| 857 | gr[_REG32_EBX] = tf->tf_rbx; |
| 858 | gr[_REG32_EDX] = tf->tf_rdx; |
| 859 | gr[_REG32_ECX] = tf->tf_rcx; |
| 860 | gr[_REG32_EAX] = tf->tf_rax; |
| 861 | gr[_REG32_EIP] = tf->tf_rip; |
| 862 | gr[_REG32_CS] = tf->tf_cs; |
| 863 | gr[_REG32_ESP] = tf->tf_rsp; |
| 864 | gr[_REG32_UESP] = tf->tf_rsp; |
| 865 | gr[_REG32_SS] = tf->tf_ss; |
| 866 | gr[_REG32_TRAPNO] = tf->tf_trapno; |
| 867 | gr[_REG32_ERR] = tf->tf_err; |
| 868 | |
| 869 | if ((ras_eip = (__greg32_t)(uintptr_t)ras_lookup(l->l_proc, |
| 870 | (void *) (uintptr_t)gr[_REG32_EIP])) != -1) |
| 871 | gr[_REG32_EIP] = ras_eip; |
| 872 | |
| 873 | *flags |= _UC_CPU; |
| 874 | |
| 875 | mcp->_mc_tlsbase = (uint32_t)(uintptr_t)l->l_private; |
| 876 | *flags |= _UC_TLSBASE; |
| 877 | |
| 878 | /* Save floating point register context. */ |
| 879 | process_read_fpregs_xmm(l, (struct fxsave *) |
| 880 | &mcp->__fpregs.__fp_reg_set.__fp_xmm_state); |
| 881 | memset(&mcp->__fpregs.__fp_pad, 0, sizeof mcp->__fpregs.__fp_pad); |
| 882 | *flags |= _UC_FXSAVE | _UC_FPU; |
| 883 | } |
| 884 | |
| 885 | void |
| 886 | startlwp32(void *arg) |
| 887 | { |
| 888 | ucontext32_t *uc = arg; |
| 889 | lwp_t *l = curlwp; |
| 890 | int error __diagused; |
| 891 | |
| 892 | error = cpu_setmcontext32(l, &uc->uc_mcontext, uc->uc_flags); |
| 893 | KASSERT(error == 0); |
| 894 | |
| 895 | /* Note: we are freeing ucontext_t, not ucontext32_t. */ |
| 896 | kmem_free(uc, sizeof(ucontext_t)); |
| 897 | userret(l); |
| 898 | } |
| 899 | |
| 900 | /* |
| 901 | * For various reasons, the amd64 port can't do what the i386 port does, |
| 902 | * and rely on catching invalid user contexts on exit from the kernel. |
| 903 | * These functions perform the needed checks. |
| 904 | */ |
| 905 | |
| 906 | static int |
| 907 | check_sigcontext32(struct lwp *l, const struct netbsd32_sigcontext *scp) |
| 908 | { |
| 909 | struct trapframe *tf; |
| 910 | struct pcb *pcb; |
| 911 | |
| 912 | tf = l->l_md.md_regs; |
| 913 | pcb = lwp_getpcb(curlwp); |
| 914 | |
| 915 | if (((scp->sc_eflags ^ tf->tf_rflags) & PSL_USERSTATIC) != 0 || |
| 916 | !VALID_USER_CSEL32(scp->sc_cs)) |
| 917 | return EINVAL; |
| 918 | if (scp->sc_fs != 0 && !VALID_USER_DSEL32(scp->sc_fs) && |
| 919 | !(VALID_USER_FSEL32(scp->sc_fs) && pcb->pcb_fs != 0)) |
| 920 | return EINVAL; |
| 921 | if (scp->sc_gs != 0 && !VALID_USER_DSEL32(scp->sc_gs) && |
| 922 | !(VALID_USER_GSEL32(scp->sc_gs) && pcb->pcb_gs != 0)) |
| 923 | return EINVAL; |
| 924 | if (scp->sc_es != 0 && !VALID_USER_DSEL32(scp->sc_es)) |
| 925 | return EINVAL; |
| 926 | if (!VALID_USER_DSEL32(scp->sc_ds) || !VALID_USER_DSEL32(scp->sc_ss)) |
| 927 | return EINVAL; |
| 928 | if (scp->sc_eip >= VM_MAXUSER_ADDRESS32) |
| 929 | return EINVAL; |
| 930 | return 0; |
| 931 | } |
| 932 | |
| 933 | int |
| 934 | cpu_mcontext32_validate(struct lwp *l, const mcontext32_t *mcp) |
| 935 | { |
| 936 | const __greg32_t *gr; |
| 937 | struct trapframe *tf; |
| 938 | struct pcb *pcb; |
| 939 | |
| 940 | gr = mcp->__gregs; |
| 941 | tf = l->l_md.md_regs; |
| 942 | pcb = lwp_getpcb(l); |
| 943 | |
| 944 | if (((gr[_REG32_EFL] ^ tf->tf_rflags) & PSL_USERSTATIC) != 0 || |
| 945 | !VALID_USER_CSEL32(gr[_REG32_CS])) |
| 946 | return EINVAL; |
| 947 | if (gr[_REG32_FS] != 0 && !VALID_USER_DSEL32(gr[_REG32_FS]) && |
| 948 | !(VALID_USER_FSEL32(gr[_REG32_FS]) && pcb->pcb_fs != 0)) |
| 949 | return EINVAL; |
| 950 | if (gr[_REG32_GS] != 0 && !VALID_USER_DSEL32(gr[_REG32_GS]) && |
| 951 | !(VALID_USER_GSEL32(gr[_REG32_GS]) && pcb->pcb_gs != 0)) |
| 952 | return EINVAL; |
| 953 | if (gr[_REG32_ES] != 0 && !VALID_USER_DSEL32(gr[_REG32_ES])) |
| 954 | return EINVAL; |
| 955 | if (!VALID_USER_DSEL32(gr[_REG32_DS]) || |
| 956 | !VALID_USER_DSEL32(gr[_REG32_SS])) |
| 957 | return EINVAL; |
| 958 | if (gr[_REG32_EIP] >= VM_MAXUSER_ADDRESS32) |
| 959 | return EINVAL; |
| 960 | return 0; |
| 961 | } |
| 962 | |
| 963 | vaddr_t |
| 964 | netbsd32_vm_default_addr(struct proc *p, vaddr_t base, vsize_t sz, |
| 965 | int topdown) |
| 966 | { |
| 967 | if (topdown) |
| 968 | return VM_DEFAULT_ADDRESS32_TOPDOWN(base, sz); |
| 969 | else |
| 970 | return VM_DEFAULT_ADDRESS32_BOTTOMUP(base, sz); |
| 971 | } |
| 972 | |
| 973 | #ifdef COMPAT_13 |
| 974 | int |
| 975 | compat_13_netbsd32_sigreturn(struct lwp *l, const struct compat_13_netbsd32_sigreturn_args *uap, register_t *retval) |
| 976 | { |
| 977 | /* { |
| 978 | syscallarg(struct netbsd32_sigcontext13 *) sigcntxp; |
| 979 | } */ |
| 980 | struct proc *p = l->l_proc; |
| 981 | struct netbsd32_sigcontext13 *scp, context; |
| 982 | struct trapframe *tf; |
| 983 | sigset_t mask; |
| 984 | int error; |
| 985 | |
| 986 | /* |
| 987 | * The trampoline code hands us the context. |
| 988 | * It is unsafe to keep track of it ourselves, in the event that a |
| 989 | * program jumps out of a signal handler. |
| 990 | */ |
| 991 | scp = (struct netbsd32_sigcontext13 *)NETBSD32PTR64(SCARG(uap, sigcntxp)); |
| 992 | if (copyin((void *)scp, &context, sizeof(*scp)) != 0) |
| 993 | return (EFAULT); |
| 994 | |
| 995 | /* Restore register context. */ |
| 996 | tf = l->l_md.md_regs; |
| 997 | |
| 998 | /* |
| 999 | * Check for security violations. |
| 1000 | */ |
| 1001 | error = check_sigcontext32(l, (const struct netbsd32_sigcontext *)&context); |
| 1002 | if (error != 0) |
| 1003 | return error; |
| 1004 | |
| 1005 | tf->tf_gs = context.sc_gs; |
| 1006 | tf->tf_fs = context.sc_fs; |
| 1007 | tf->tf_es = context.sc_es; |
| 1008 | tf->tf_ds = context.sc_ds; |
| 1009 | tf->tf_rflags = context.sc_eflags; |
| 1010 | tf->tf_rdi = context.sc_edi; |
| 1011 | tf->tf_rsi = context.sc_esi; |
| 1012 | tf->tf_rbp = context.sc_ebp; |
| 1013 | tf->tf_rbx = context.sc_ebx; |
| 1014 | tf->tf_rdx = context.sc_edx; |
| 1015 | tf->tf_rcx = context.sc_ecx; |
| 1016 | tf->tf_rax = context.sc_eax; |
| 1017 | tf->tf_rip = context.sc_eip; |
| 1018 | tf->tf_cs = context.sc_cs; |
| 1019 | tf->tf_rsp = context.sc_esp; |
| 1020 | tf->tf_ss = context.sc_ss; |
| 1021 | |
| 1022 | mutex_enter(p->p_lock); |
| 1023 | /* Restore signal stack. */ |
| 1024 | if (context.sc_onstack & SS_ONSTACK) |
| 1025 | l->l_sigstk.ss_flags |= SS_ONSTACK; |
| 1026 | else |
| 1027 | l->l_sigstk.ss_flags &= ~SS_ONSTACK; |
| 1028 | /* Restore signal mask. */ |
| 1029 | native_sigset13_to_sigset((sigset13_t *)&context.sc_mask, &mask); |
| 1030 | (void) sigprocmask1(l, SIG_SETMASK, &mask, 0); |
| 1031 | mutex_exit(p->p_lock); |
| 1032 | |
| 1033 | return (EJUSTRETURN); |
| 1034 | } |
| 1035 | #endif |
| 1036 | |