2 * Copyright (c) 2003 Peter Wemm.
3 * Copyright (c) 1992 Terrence R. Lambert.
4 * Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include "opt_atpic.h"
45 #include "opt_compat.h"
50 #include "opt_kstack_pages.h"
51 #include "opt_maxmem.h"
52 #include "opt_mp_watchdog.h"
53 #include "opt_perfmon.h"
54 #include "opt_platform.h"
55 #include "opt_sched.h"
57 #include <sys/param.h>
59 #include <sys/systm.h>
63 #include <sys/callout.h>
67 #include <sys/eventhandler.h>
69 #include <sys/imgact.h>
71 #include <sys/kernel.h>
73 #include <sys/linker.h>
75 #include <sys/malloc.h>
76 #include <sys/memrange.h>
77 #include <sys/msgbuf.h>
78 #include <sys/mutex.h>
80 #include <sys/ptrace.h>
81 #include <sys/reboot.h>
82 #include <sys/rwlock.h>
83 #include <sys/sched.h>
84 #include <sys/signalvar.h>
88 #include <sys/syscallsubr.h>
89 #include <sys/sysctl.h>
90 #include <sys/sysent.h>
91 #include <sys/sysproto.h>
92 #include <sys/ucontext.h>
93 #include <sys/vmmeter.h>
96 #include <vm/vm_extern.h>
97 #include <vm/vm_kern.h>
98 #include <vm/vm_page.h>
99 #include <vm/vm_map.h>
100 #include <vm/vm_object.h>
101 #include <vm/vm_pager.h>
102 #include <vm/vm_param.h>
106 #error KDB must be enabled in order for DDB to work!
109 #include <ddb/db_sym.h>
112 #include <net/netisr.h>
114 #include <machine/clock.h>
115 #include <machine/cpu.h>
116 #include <machine/cputypes.h>
117 #include <machine/intr_machdep.h>
119 #include <machine/md_var.h>
120 #include <machine/metadata.h>
121 #include <machine/mp_watchdog.h>
122 #include <machine/pc/bios.h>
123 #include <machine/pcb.h>
124 #include <machine/proc.h>
125 #include <machine/reg.h>
126 #include <machine/sigframe.h>
127 #include <machine/specialreg.h>
129 #include <machine/perfmon.h>
131 #include <machine/tss.h>
133 #include <machine/smp.h>
140 #include <x86/isa/icu.h>
142 #include <x86/apicvar.h>
145 #include <isa/isareg.h>
147 #include <x86/init.h>
149 /* Sanity check for __curthread() */
150 CTASSERT(offsetof(struct pcpu, pc_curthread) == 0);
152 extern u_int64_t hammer_time(u_int64_t, u_int64_t);
154 #define CS_SECURE(cs) (ISPL(cs) == SEL_UPL)
155 #define EFL_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0)
157 static void cpu_startup(void *);
158 static void get_fpcontext(struct thread *td, mcontext_t *mcp,
159 char *xfpusave, size_t xfpusave_len);
160 static int set_fpcontext(struct thread *td, mcontext_t *mcp,
161 char *xfpustate, size_t xfpustate_len);
162 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
164 /* Preload data parse function */
165 static caddr_t native_parse_preload_data(u_int64_t);
167 /* Native function to fetch and parse the e820 map */
168 static void native_parse_memmap(caddr_t, vm_paddr_t *, int *);
170 /* Default init_ops implementation. */
171 struct init_ops init_ops = {
172 .parse_preload_data = native_parse_preload_data,
173 .early_clock_source_init = i8254_init,
174 .early_delay = i8254_delay,
175 .parse_memmap = native_parse_memmap,
177 .mp_bootaddress = mp_bootaddress,
178 .start_all_aps = native_start_all_aps,
180 .msi_init = msi_init,
184 * The file "conf/ldscript.amd64" defines the symbol "kernphys". Its value is
185 * the physical address at which the kernel is loaded.
187 extern char kernphys[];
189 struct msgbuf *msgbufp;
191 /* Intel ICH registers */
192 #define ICH_PMBASE 0x400
193 #define ICH_SMI_EN ICH_PMBASE + 0x30
195 int _udatasel, _ucodesel, _ucode32sel, _ufssel, _ugssel;
203 * The number of PHYSMAP entries must be one less than the number of
204 * PHYSSEG entries because the PHYSMAP entry that spans the largest
205 * physical address that is accessible by ISA DMA is split into two
208 #define PHYSMAP_SIZE (2 * (VM_PHYSSEG_MAX - 1))
210 vm_paddr_t phys_avail[PHYSMAP_SIZE + 2];
211 vm_paddr_t dump_avail[PHYSMAP_SIZE + 2];
213 /* must be 2 less so 0 0 can signal end of chunks */
214 #define PHYS_AVAIL_ARRAY_END ((sizeof(phys_avail) / sizeof(phys_avail[0])) - 2)
215 #define DUMP_AVAIL_ARRAY_END ((sizeof(dump_avail) / sizeof(dump_avail[0])) - 2)
217 struct kva_md_info kmi;
219 static struct trapframe proc0_tf;
220 struct region_descriptor r_gdt, r_idt;
222 struct pcpu __pcpu[MAXCPU];
226 struct mem_range_softc mem_range_softc;
228 struct mtx dt_lock; /* lock for GDT and LDT */
230 void (*vmm_resume_p)(void);
240 * On MacBooks, we need to disallow the legacy USB circuit to
241 * generate an SMI# because this can cause several problems,
242 * namely: incorrect CPU frequency detection and failure to
244 * We do this by disabling a bit in the SMI_EN (SMI Control and
245 * Enable register) of the Intel ICH LPC Interface Bridge.
247 sysenv = kern_getenv("smbios.system.product");
248 if (sysenv != NULL) {
249 if (strncmp(sysenv, "MacBook1,1", 10) == 0 ||
250 strncmp(sysenv, "MacBook3,1", 10) == 0 ||
251 strncmp(sysenv, "MacBook4,1", 10) == 0 ||
252 strncmp(sysenv, "MacBookPro1,1", 13) == 0 ||
253 strncmp(sysenv, "MacBookPro1,2", 13) == 0 ||
254 strncmp(sysenv, "MacBookPro3,1", 13) == 0 ||
255 strncmp(sysenv, "MacBookPro4,1", 13) == 0 ||
256 strncmp(sysenv, "Macmini1,1", 10) == 0) {
258 printf("Disabling LEGACY_USB_EN bit on "
260 outl(ICH_SMI_EN, inl(ICH_SMI_EN) & ~0x8);
266 * Good {morning,afternoon,evening,night}.
270 panicifcpuunsupported();
276 * Display physical memory if SMBIOS reports reasonable amount.
279 sysenv = kern_getenv("smbios.memory.enabled");
280 if (sysenv != NULL) {
281 memsize = (uintmax_t)strtoul(sysenv, (char **)NULL, 10) << 10;
284 if (memsize < ptoa((uintmax_t)vm_cnt.v_free_count))
285 memsize = ptoa((uintmax_t)Maxmem);
286 printf("real memory = %ju (%ju MB)\n", memsize, memsize >> 20);
287 realmem = atop(memsize);
290 * Display any holes after the first chunk of extended memory.
295 printf("Physical memory chunk(s):\n");
296 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
299 size = phys_avail[indx + 1] - phys_avail[indx];
301 "0x%016jx - 0x%016jx, %ju bytes (%ju pages)\n",
302 (uintmax_t)phys_avail[indx],
303 (uintmax_t)phys_avail[indx + 1] - 1,
304 (uintmax_t)size, (uintmax_t)size / PAGE_SIZE);
308 vm_ksubmap_init(&kmi);
310 printf("avail memory = %ju (%ju MB)\n",
311 ptoa((uintmax_t)vm_cnt.v_free_count),
312 ptoa((uintmax_t)vm_cnt.v_free_count) / 1048576);
315 * Set up buffers, so they can be used to read disk labels.
318 vm_pager_bufferinit();
324 * Send an interrupt to process.
326 * Stack is set up to allow sigcode stored
327 * at top to call routine, followed by call
328 * to sigreturn routine below. After sigreturn
329 * resets the signal mask, the stack, and the
330 * frame pointer, it returns to the user
334 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
336 struct sigframe sf, *sfp;
342 struct trapframe *regs;
351 PROC_LOCK_ASSERT(p, MA_OWNED);
352 sig = ksi->ksi_signo;
354 mtx_assert(&psp->ps_mtx, MA_OWNED);
356 oonstack = sigonstack(regs->tf_rsp);
358 if (cpu_max_ext_state_size > sizeof(struct savefpu) && use_xsave) {
359 xfpusave_len = cpu_max_ext_state_size - sizeof(struct savefpu);
360 xfpusave = __builtin_alloca(xfpusave_len);
366 /* Save user context. */
367 bzero(&sf, sizeof(sf));
368 sf.sf_uc.uc_sigmask = *mask;
369 sf.sf_uc.uc_stack = td->td_sigstk;
370 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
371 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
372 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
373 bcopy(regs, &sf.sf_uc.uc_mcontext.mc_rdi, sizeof(*regs));
374 sf.sf_uc.uc_mcontext.mc_len = sizeof(sf.sf_uc.uc_mcontext); /* magic */
375 get_fpcontext(td, &sf.sf_uc.uc_mcontext, xfpusave, xfpusave_len);
377 sf.sf_uc.uc_mcontext.mc_fsbase = pcb->pcb_fsbase;
378 sf.sf_uc.uc_mcontext.mc_gsbase = pcb->pcb_gsbase;
379 bzero(sf.sf_uc.uc_mcontext.mc_spare,
380 sizeof(sf.sf_uc.uc_mcontext.mc_spare));
381 bzero(sf.sf_uc.__spare__, sizeof(sf.sf_uc.__spare__));
383 /* Allocate space for the signal handler context. */
384 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
385 SIGISMEMBER(psp->ps_sigonstack, sig)) {
386 sp = td->td_sigstk.ss_sp + td->td_sigstk.ss_size;
387 #if defined(COMPAT_43)
388 td->td_sigstk.ss_flags |= SS_ONSTACK;
391 sp = (char *)regs->tf_rsp - 128;
392 if (xfpusave != NULL) {
394 sp = (char *)((unsigned long)sp & ~0x3Ful);
395 sf.sf_uc.uc_mcontext.mc_xfpustate = (register_t)sp;
397 sp -= sizeof(struct sigframe);
398 /* Align to 16 bytes. */
399 sfp = (struct sigframe *)((unsigned long)sp & ~0xFul);
401 /* Build the argument list for the signal handler. */
402 regs->tf_rdi = sig; /* arg 1 in %rdi */
403 regs->tf_rdx = (register_t)&sfp->sf_uc; /* arg 3 in %rdx */
404 bzero(&sf.sf_si, sizeof(sf.sf_si));
405 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
406 /* Signal handler installed with SA_SIGINFO. */
407 regs->tf_rsi = (register_t)&sfp->sf_si; /* arg 2 in %rsi */
408 sf.sf_ahu.sf_action = (__siginfohandler_t *)catcher;
410 /* Fill in POSIX parts */
411 sf.sf_si = ksi->ksi_info;
412 sf.sf_si.si_signo = sig; /* maybe a translated signal */
413 regs->tf_rcx = (register_t)ksi->ksi_addr; /* arg 4 in %rcx */
415 /* Old FreeBSD-style arguments. */
416 regs->tf_rsi = ksi->ksi_code; /* arg 2 in %rsi */
417 regs->tf_rcx = (register_t)ksi->ksi_addr; /* arg 4 in %rcx */
418 sf.sf_ahu.sf_handler = catcher;
420 mtx_unlock(&psp->ps_mtx);
424 * Copy the sigframe out to the user's stack.
426 if (copyout(&sf, sfp, sizeof(*sfp)) != 0 ||
427 (xfpusave != NULL && copyout(xfpusave,
428 (void *)sf.sf_uc.uc_mcontext.mc_xfpustate, xfpusave_len)
431 printf("process %ld has trashed its stack\n", (long)p->p_pid);
437 regs->tf_rsp = (long)sfp;
438 regs->tf_rip = p->p_sysent->sv_sigcode_base;
439 regs->tf_rflags &= ~(PSL_T | PSL_D);
440 regs->tf_cs = _ucodesel;
441 regs->tf_ds = _udatasel;
442 regs->tf_ss = _udatasel;
443 regs->tf_es = _udatasel;
444 regs->tf_fs = _ufssel;
445 regs->tf_gs = _ugssel;
446 regs->tf_flags = TF_HASSEGS;
447 set_pcb_flags(pcb, PCB_FULL_IRET);
449 mtx_lock(&psp->ps_mtx);
453 * System call to cleanup state after a signal
454 * has been taken. Reset signal mask and
455 * stack state from context left by sendsig (above).
456 * Return to previous pc and psl as specified by
457 * context left by sendsig. Check carefully to
458 * make sure that the user has not modified the
459 * state to gain improper privileges.
464 sys_sigreturn(td, uap)
466 struct sigreturn_args /* {
467 const struct __ucontext *sigcntxp;
473 struct trapframe *regs;
476 size_t xfpustate_len;
484 error = copyin(uap->sigcntxp, &uc, sizeof(uc));
486 uprintf("pid %d (%s): sigreturn copyin failed\n",
487 p->p_pid, td->td_name);
491 if ((ucp->uc_mcontext.mc_flags & ~_MC_FLAG_MASK) != 0) {
492 uprintf("pid %d (%s): sigreturn mc_flags %x\n", p->p_pid,
493 td->td_name, ucp->uc_mcontext.mc_flags);
497 rflags = ucp->uc_mcontext.mc_rflags;
499 * Don't allow users to change privileged or reserved flags.
501 if (!EFL_SECURE(rflags, regs->tf_rflags)) {
502 uprintf("pid %d (%s): sigreturn rflags = 0x%lx\n", p->p_pid,
503 td->td_name, rflags);
508 * Don't allow users to load a valid privileged %cs. Let the
509 * hardware check for invalid selectors, excess privilege in
510 * other selectors, invalid %eip's and invalid %esp's.
512 cs = ucp->uc_mcontext.mc_cs;
513 if (!CS_SECURE(cs)) {
514 uprintf("pid %d (%s): sigreturn cs = 0x%x\n", p->p_pid,
516 ksiginfo_init_trap(&ksi);
517 ksi.ksi_signo = SIGBUS;
518 ksi.ksi_code = BUS_OBJERR;
519 ksi.ksi_trapno = T_PROTFLT;
520 ksi.ksi_addr = (void *)regs->tf_rip;
521 trapsignal(td, &ksi);
525 if ((uc.uc_mcontext.mc_flags & _MC_HASFPXSTATE) != 0) {
526 xfpustate_len = uc.uc_mcontext.mc_xfpustate_len;
527 if (xfpustate_len > cpu_max_ext_state_size -
528 sizeof(struct savefpu)) {
529 uprintf("pid %d (%s): sigreturn xfpusave_len = 0x%zx\n",
530 p->p_pid, td->td_name, xfpustate_len);
533 xfpustate = __builtin_alloca(xfpustate_len);
534 error = copyin((const void *)uc.uc_mcontext.mc_xfpustate,
535 xfpustate, xfpustate_len);
538 "pid %d (%s): sigreturn copying xfpustate failed\n",
539 p->p_pid, td->td_name);
546 ret = set_fpcontext(td, &ucp->uc_mcontext, xfpustate, xfpustate_len);
548 uprintf("pid %d (%s): sigreturn set_fpcontext err %d\n",
549 p->p_pid, td->td_name, ret);
552 bcopy(&ucp->uc_mcontext.mc_rdi, regs, sizeof(*regs));
553 pcb->pcb_fsbase = ucp->uc_mcontext.mc_fsbase;
554 pcb->pcb_gsbase = ucp->uc_mcontext.mc_gsbase;
556 #if defined(COMPAT_43)
557 if (ucp->uc_mcontext.mc_onstack & 1)
558 td->td_sigstk.ss_flags |= SS_ONSTACK;
560 td->td_sigstk.ss_flags &= ~SS_ONSTACK;
563 kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0);
564 set_pcb_flags(pcb, PCB_FULL_IRET);
565 return (EJUSTRETURN);
568 #ifdef COMPAT_FREEBSD4
570 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
573 return sys_sigreturn(td, (struct sigreturn_args *)uap);
578 * Reset registers to default values on exec.
581 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
583 struct trapframe *regs = td->td_frame;
584 struct pcb *pcb = td->td_pcb;
587 if (td->td_proc->p_md.md_ldt != NULL)
590 mtx_unlock(&dt_lock);
594 clear_pcb_flags(pcb, PCB_32BIT);
595 pcb->pcb_initial_fpucw = __INITIAL_FPUCW__;
596 set_pcb_flags(pcb, PCB_FULL_IRET);
598 bzero((char *)regs, sizeof(struct trapframe));
599 regs->tf_rip = imgp->entry_addr;
600 regs->tf_rsp = ((stack - 8) & ~0xFul) + 8;
601 regs->tf_rdi = stack; /* argv */
602 regs->tf_rflags = PSL_USER | (regs->tf_rflags & PSL_T);
603 regs->tf_ss = _udatasel;
604 regs->tf_cs = _ucodesel;
605 regs->tf_ds = _udatasel;
606 regs->tf_es = _udatasel;
607 regs->tf_fs = _ufssel;
608 regs->tf_gs = _ugssel;
609 regs->tf_flags = TF_HASSEGS;
610 td->td_retval[1] = 0;
613 * Reset the hardware debug registers if they were in use.
614 * They won't have any meaning for the newly exec'd process.
616 if (pcb->pcb_flags & PCB_DBREGS) {
625 * Clear the debug registers on the running
626 * CPU, otherwise they will end up affecting
627 * the next process we switch to.
631 clear_pcb_flags(pcb, PCB_DBREGS);
635 * Drop the FP state if we hold it, so that the process gets a
636 * clean FP state if it uses the FPU again.
648 * CR0_MP, CR0_NE and CR0_TS are also set by npx_probe() for the
649 * BSP. See the comments there about why we set them.
651 cr0 |= CR0_MP | CR0_NE | CR0_TS | CR0_WP | CR0_AM;
656 * Initialize amd64 and configure to run kernel
660 * Initialize segments & interrupt table
663 struct user_segment_descriptor gdt[NGDT * MAXCPU];/* global descriptor tables */
664 static struct gate_descriptor idt0[NIDT];
665 struct gate_descriptor *idt = &idt0[0]; /* interrupt descriptor table */
667 static char dblfault_stack[PAGE_SIZE] __aligned(16);
669 static char nmi0_stack[PAGE_SIZE] __aligned(16);
670 CTASSERT(sizeof(struct nmi_pcpu) == 16);
672 struct amd64tss common_tss[MAXCPU];
675 * Software prototypes -- in more palatable form.
677 * Keep GUFS32, GUGS32, GUCODE32 and GUDATA at the same
678 * slots as corresponding segments for i386 kernel.
680 struct soft_segment_descriptor gdt_segs[] = {
681 /* GNULL_SEL 0 Null Descriptor */
690 /* GNULL2_SEL 1 Null Descriptor */
699 /* GUFS32_SEL 2 32 bit %gs Descriptor for user */
701 .ssd_limit = 0xfffff,
702 .ssd_type = SDT_MEMRWA,
708 /* GUGS32_SEL 3 32 bit %fs Descriptor for user */
710 .ssd_limit = 0xfffff,
711 .ssd_type = SDT_MEMRWA,
717 /* GCODE_SEL 4 Code Descriptor for kernel */
719 .ssd_limit = 0xfffff,
720 .ssd_type = SDT_MEMERA,
726 /* GDATA_SEL 5 Data Descriptor for kernel */
728 .ssd_limit = 0xfffff,
729 .ssd_type = SDT_MEMRWA,
735 /* GUCODE32_SEL 6 32 bit Code Descriptor for user */
737 .ssd_limit = 0xfffff,
738 .ssd_type = SDT_MEMERA,
744 /* GUDATA_SEL 7 32/64 bit Data Descriptor for user */
746 .ssd_limit = 0xfffff,
747 .ssd_type = SDT_MEMRWA,
753 /* GUCODE_SEL 8 64 bit Code Descriptor for user */
755 .ssd_limit = 0xfffff,
756 .ssd_type = SDT_MEMERA,
762 /* GPROC0_SEL 9 Proc 0 Tss Descriptor */
764 .ssd_limit = sizeof(struct amd64tss) + IOPERM_BITMAP_SIZE - 1,
765 .ssd_type = SDT_SYSTSS,
771 /* Actually, the TSS is a system descriptor which is double size */
780 /* GUSERLDT_SEL 11 LDT Descriptor */
789 /* GUSERLDT_SEL 12 LDT Descriptor, double size */
801 setidt(idx, func, typ, dpl, ist)
808 struct gate_descriptor *ip;
811 ip->gd_looffset = (uintptr_t)func;
812 ip->gd_selector = GSEL(GCODE_SEL, SEL_KPL);
818 ip->gd_hioffset = ((uintptr_t)func)>>16 ;
822 IDTVEC(div), IDTVEC(dbg), IDTVEC(nmi), IDTVEC(bpt), IDTVEC(ofl),
823 IDTVEC(bnd), IDTVEC(ill), IDTVEC(dna), IDTVEC(fpusegm),
824 IDTVEC(tss), IDTVEC(missing), IDTVEC(stk), IDTVEC(prot),
825 IDTVEC(page), IDTVEC(mchk), IDTVEC(rsvd), IDTVEC(fpu), IDTVEC(align),
826 IDTVEC(xmm), IDTVEC(dblfault),
831 IDTVEC(xen_intr_upcall),
833 IDTVEC(fast_syscall), IDTVEC(fast_syscall32);
837 * Display the index and function name of any IDT entries that don't use
838 * the default 'rsvd' entry point.
840 DB_SHOW_COMMAND(idt, db_show_idt)
842 struct gate_descriptor *ip;
847 for (idx = 0; idx < NIDT && !db_pager_quit; idx++) {
848 func = ((long)ip->gd_hioffset << 16 | ip->gd_looffset);
849 if (func != (uintptr_t)&IDTVEC(rsvd)) {
850 db_printf("%3d\t", idx);
851 db_printsym(func, DB_STGY_PROC);
858 /* Show privileged registers. */
859 DB_SHOW_COMMAND(sysregs, db_show_sysregs)
864 } __packed idtr, gdtr;
867 __asm __volatile("sidt %0" : "=m" (idtr));
868 db_printf("idtr\t0x%016lx/%04x\n",
869 (u_long)idtr.base, (u_int)idtr.limit);
870 __asm __volatile("sgdt %0" : "=m" (gdtr));
871 db_printf("gdtr\t0x%016lx/%04x\n",
872 (u_long)gdtr.base, (u_int)gdtr.limit);
873 __asm __volatile("sldt %0" : "=r" (ldt));
874 db_printf("ldtr\t0x%04x\n", ldt);
875 __asm __volatile("str %0" : "=r" (tr));
876 db_printf("tr\t0x%04x\n", tr);
877 db_printf("cr0\t0x%016lx\n", rcr0());
878 db_printf("cr2\t0x%016lx\n", rcr2());
879 db_printf("cr3\t0x%016lx\n", rcr3());
880 db_printf("cr4\t0x%016lx\n", rcr4());
881 if (rcr4() & CR4_XSAVE)
882 db_printf("xcr0\t0x%016lx\n", rxcr(0));
883 db_printf("EFER\t0x%016lx\n", rdmsr(MSR_EFER));
884 if (cpu_feature2 & (CPUID2_VMX | CPUID2_SMX))
885 db_printf("FEATURES_CTL\t%016lx\n",
886 rdmsr(MSR_IA32_FEATURE_CONTROL));
887 db_printf("DEBUG_CTL\t0x%016lx\n", rdmsr(MSR_DEBUGCTLMSR));
888 db_printf("PAT\t0x%016lx\n", rdmsr(MSR_PAT));
889 db_printf("GSBASE\t0x%016lx\n", rdmsr(MSR_GSBASE));
892 DB_SHOW_COMMAND(dbregs, db_show_dbregs)
895 db_printf("dr0\t0x%016lx\n", rdr0());
896 db_printf("dr1\t0x%016lx\n", rdr1());
897 db_printf("dr2\t0x%016lx\n", rdr2());
898 db_printf("dr3\t0x%016lx\n", rdr3());
899 db_printf("dr6\t0x%016lx\n", rdr6());
900 db_printf("dr7\t0x%016lx\n", rdr7());
906 struct user_segment_descriptor *sd;
907 struct soft_segment_descriptor *ssd;
910 ssd->ssd_base = (sd->sd_hibase << 24) | sd->sd_lobase;
911 ssd->ssd_limit = (sd->sd_hilimit << 16) | sd->sd_lolimit;
912 ssd->ssd_type = sd->sd_type;
913 ssd->ssd_dpl = sd->sd_dpl;
914 ssd->ssd_p = sd->sd_p;
915 ssd->ssd_long = sd->sd_long;
916 ssd->ssd_def32 = sd->sd_def32;
917 ssd->ssd_gran = sd->sd_gran;
922 struct soft_segment_descriptor *ssd;
923 struct user_segment_descriptor *sd;
926 sd->sd_lobase = (ssd->ssd_base) & 0xffffff;
927 sd->sd_hibase = (ssd->ssd_base >> 24) & 0xff;
928 sd->sd_lolimit = (ssd->ssd_limit) & 0xffff;
929 sd->sd_hilimit = (ssd->ssd_limit >> 16) & 0xf;
930 sd->sd_type = ssd->ssd_type;
931 sd->sd_dpl = ssd->ssd_dpl;
932 sd->sd_p = ssd->ssd_p;
933 sd->sd_long = ssd->ssd_long;
934 sd->sd_def32 = ssd->ssd_def32;
935 sd->sd_gran = ssd->ssd_gran;
940 struct soft_segment_descriptor *ssd;
941 struct system_segment_descriptor *sd;
944 sd->sd_lobase = (ssd->ssd_base) & 0xffffff;
945 sd->sd_hibase = (ssd->ssd_base >> 24) & 0xfffffffffful;
946 sd->sd_lolimit = (ssd->ssd_limit) & 0xffff;
947 sd->sd_hilimit = (ssd->ssd_limit >> 16) & 0xf;
948 sd->sd_type = ssd->ssd_type;
949 sd->sd_dpl = ssd->ssd_dpl;
950 sd->sd_p = ssd->ssd_p;
951 sd->sd_gran = ssd->ssd_gran;
954 #if !defined(DEV_ATPIC) && defined(DEV_ISA)
955 #include <isa/isavar.h>
956 #include <isa/isareg.h>
958 * Return a bitmap of the current interrupt requests. This is 8259-specific
959 * and is only suitable for use at probe time.
960 * This is only here to pacify sio. It is NOT FATAL if this doesn't work.
961 * It shouldn't be here. There should probably be an APIC centric
962 * implementation in the apic driver code, if at all.
965 isa_irq_pending(void)
972 return ((irr2 << 8) | irr1);
979 add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap,
982 int i, insert_idx, physmap_idx;
984 physmap_idx = *physmap_idxp;
990 * Find insertion point while checking for overlap. Start off by
991 * assuming the new entry will be added to the end.
993 * NB: physmap_idx points to the next free slot.
995 insert_idx = physmap_idx;
996 for (i = 0; i <= physmap_idx; i += 2) {
997 if (base < physmap[i + 1]) {
998 if (base + length <= physmap[i]) {
1002 if (boothowto & RB_VERBOSE)
1004 "Overlapping memory regions, ignoring second region\n");
1009 /* See if we can prepend to the next entry. */
1010 if (insert_idx <= physmap_idx && base + length == physmap[insert_idx]) {
1011 physmap[insert_idx] = base;
1015 /* See if we can append to the previous entry. */
1016 if (insert_idx > 0 && base == physmap[insert_idx - 1]) {
1017 physmap[insert_idx - 1] += length;
1022 *physmap_idxp = physmap_idx;
1023 if (physmap_idx == PHYSMAP_SIZE) {
1025 "Too many segments in the physical address map, giving up\n");
1030 * Move the last 'N' entries down to make room for the new
1033 for (i = (physmap_idx - 2); i > insert_idx; i -= 2) {
1034 physmap[i] = physmap[i - 2];
1035 physmap[i + 1] = physmap[i - 1];
1038 /* Insert the new entry. */
1039 physmap[insert_idx] = base;
1040 physmap[insert_idx + 1] = base + length;
1045 bios_add_smap_entries(struct bios_smap *smapbase, u_int32_t smapsize,
1046 vm_paddr_t *physmap, int *physmap_idx)
1048 struct bios_smap *smap, *smapend;
1050 smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize);
1052 for (smap = smapbase; smap < smapend; smap++) {
1053 if (boothowto & RB_VERBOSE)
1054 printf("SMAP type=%02x base=%016lx len=%016lx\n",
1055 smap->type, smap->base, smap->length);
1057 if (smap->type != SMAP_TYPE_MEMORY)
1060 if (!add_physmap_entry(smap->base, smap->length, physmap,
1066 #define efi_next_descriptor(ptr, size) \
1067 ((struct efi_md *)(((uint8_t *) ptr) + size))
1070 add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap,
1073 struct efi_md *map, *p;
1078 static const char *types[] = {
1084 "RuntimeServicesCode",
1085 "RuntimeServicesData",
1086 "ConventionalMemory",
1088 "ACPIReclaimMemory",
1091 "MemoryMappedIOPortSpace",
1096 * Memory map data provided by UEFI via the GetMemoryMap
1097 * Boot Services API.
1099 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
1100 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
1102 if (efihdr->descriptor_size == 0)
1104 ndesc = efihdr->memory_size / efihdr->descriptor_size;
1106 if (boothowto & RB_VERBOSE)
1107 printf("%23s %12s %12s %8s %4s\n",
1108 "Type", "Physical", "Virtual", "#Pages", "Attr");
1110 for (i = 0, p = map; i < ndesc; i++,
1111 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
1112 if (boothowto & RB_VERBOSE) {
1113 if (p->md_type <= EFI_MD_TYPE_PALCODE)
1114 type = types[p->md_type];
1117 printf("%23s %012lx %12p %08lx ", type, p->md_phys,
1118 p->md_virt, p->md_pages);
1119 if (p->md_attr & EFI_MD_ATTR_UC)
1121 if (p->md_attr & EFI_MD_ATTR_WC)
1123 if (p->md_attr & EFI_MD_ATTR_WT)
1125 if (p->md_attr & EFI_MD_ATTR_WB)
1127 if (p->md_attr & EFI_MD_ATTR_UCE)
1129 if (p->md_attr & EFI_MD_ATTR_WP)
1131 if (p->md_attr & EFI_MD_ATTR_RP)
1133 if (p->md_attr & EFI_MD_ATTR_XP)
1135 if (p->md_attr & EFI_MD_ATTR_RT)
1140 switch (p->md_type) {
1141 case EFI_MD_TYPE_CODE:
1142 case EFI_MD_TYPE_DATA:
1143 case EFI_MD_TYPE_BS_CODE:
1144 case EFI_MD_TYPE_BS_DATA:
1145 case EFI_MD_TYPE_FREE:
1147 * We're allowed to use any entry with these types.
1154 if (!add_physmap_entry(p->md_phys, (p->md_pages * PAGE_SIZE),
1155 physmap, physmap_idx))
1160 static char bootmethod[16] = "";
1161 SYSCTL_STRING(_machdep, OID_AUTO, bootmethod, CTLFLAG_RD, bootmethod, 0,
1162 "System firmware boot method");
1165 native_parse_memmap(caddr_t kmdp, vm_paddr_t *physmap, int *physmap_idx)
1167 struct bios_smap *smap;
1168 struct efi_map_header *efihdr;
1172 * Memory map from INT 15:E820.
1174 * subr_module.c says:
1175 * "Consumer may safely assume that size value precedes data."
1176 * ie: an int32_t immediately precedes smap.
1179 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
1180 MODINFO_METADATA | MODINFOMD_EFI_MAP);
1181 smap = (struct bios_smap *)preload_search_info(kmdp,
1182 MODINFO_METADATA | MODINFOMD_SMAP);
1183 if (efihdr == NULL && smap == NULL)
1184 panic("No BIOS smap or EFI map info from loader!");
1186 if (efihdr != NULL) {
1187 add_efi_map_entries(efihdr, physmap, physmap_idx);
1188 strlcpy(bootmethod, "UEFI", sizeof(bootmethod));
1190 size = *((u_int32_t *)smap - 1);
1191 bios_add_smap_entries(smap, size, physmap, physmap_idx);
1192 strlcpy(bootmethod, "BIOS", sizeof(bootmethod));
1196 #define PAGES_PER_GB (1024 * 1024 * 1024 / PAGE_SIZE)
1199 * Populate the (physmap) array with base/bound pairs describing the
1200 * available physical memory in the system, then test this memory and
1201 * build the phys_avail array describing the actually-available memory.
1203 * Total memory size may be set by the kernel environment variable
1204 * hw.physmem or the compile-time define MAXMEM.
1206 * XXX first should be vm_paddr_t.
1209 getmemsize(caddr_t kmdp, u_int64_t first)
1211 int i, physmap_idx, pa_indx, da_indx;
1212 vm_paddr_t pa, physmap[PHYSMAP_SIZE];
1213 u_long physmem_start, physmem_tunable, memtest;
1215 quad_t dcons_addr, dcons_size;
1218 bzero(physmap, sizeof(physmap));
1221 init_ops.parse_memmap(kmdp, physmap, &physmap_idx);
1225 * Find the 'base memory' segment for SMP
1228 for (i = 0; i <= physmap_idx; i += 2) {
1229 if (physmap[i] <= 0xA0000) {
1230 basemem = physmap[i + 1] / 1024;
1234 if (basemem == 0 || basemem > 640) {
1237 "Memory map doesn't contain a basemem segment, faking it");
1242 * Make hole for "AP -> long mode" bootstrap code. The
1243 * mp_bootaddress vector is only available when the kernel
1244 * is configured to support APs and APs for the system start
1245 * in 32bit mode (e.g. SMP bare metal).
1247 if (init_ops.mp_bootaddress) {
1248 if (physmap[1] >= 0x100000000)
1250 "Basemem segment is not suitable for AP bootstrap code!");
1251 physmap[1] = init_ops.mp_bootaddress(physmap[1] / 1024);
1255 * Maxmem isn't the "maximum memory", it's one larger than the
1256 * highest page of the physical address space. It should be
1257 * called something like "Maxphyspage". We may adjust this
1258 * based on ``hw.physmem'' and the results of the memory test.
1260 Maxmem = atop(physmap[physmap_idx + 1]);
1263 Maxmem = MAXMEM / 4;
1266 if (TUNABLE_ULONG_FETCH("hw.physmem", &physmem_tunable))
1267 Maxmem = atop(physmem_tunable);
1270 * The boot memory test is disabled by default, as it takes a
1271 * significant amount of time on large-memory systems, and is
1272 * unfriendly to virtual machines as it unnecessarily touches all
1275 * A general name is used as the code may be extended to support
1276 * additional tests beyond the current "page present" test.
1279 TUNABLE_ULONG_FETCH("hw.memtest.tests", &memtest);
1282 * Don't allow MAXMEM or hw.physmem to extend the amount of memory
1285 if (Maxmem > atop(physmap[physmap_idx + 1]))
1286 Maxmem = atop(physmap[physmap_idx + 1]);
1288 if (atop(physmap[physmap_idx + 1]) != Maxmem &&
1289 (boothowto & RB_VERBOSE))
1290 printf("Physical memory use set to %ldK\n", Maxmem * 4);
1292 /* call pmap initialization to make new kernel address space */
1293 pmap_bootstrap(&first);
1296 * Size up each available chunk of physical memory.
1298 * XXX Some BIOSes corrupt low 64KB between suspend and resume.
1299 * By default, mask off the first 16 pages unless we appear to be
1302 physmem_start = (vm_guest > VM_GUEST_NO ? 1 : 16) << PAGE_SHIFT;
1303 TUNABLE_ULONG_FETCH("hw.physmem.start", &physmem_start);
1304 if (physmap[0] < physmem_start) {
1305 if (physmem_start < PAGE_SIZE)
1306 physmap[0] = PAGE_SIZE;
1307 else if (physmem_start >= physmap[1])
1308 physmap[0] = round_page(physmap[1] - PAGE_SIZE);
1310 physmap[0] = round_page(physmem_start);
1314 phys_avail[pa_indx++] = physmap[0];
1315 phys_avail[pa_indx] = physmap[0];
1316 dump_avail[da_indx] = physmap[0];
1320 * Get dcons buffer address
1322 if (getenv_quad("dcons.addr", &dcons_addr) == 0 ||
1323 getenv_quad("dcons.size", &dcons_size) == 0)
1327 * physmap is in bytes, so when converting to page boundaries,
1328 * round up the start address and round down the end address.
1332 printf("Testing system memory");
1333 for (i = 0; i <= physmap_idx; i += 2) {
1336 end = ptoa((vm_paddr_t)Maxmem);
1337 if (physmap[i + 1] < end)
1338 end = trunc_page(physmap[i + 1]);
1339 for (pa = round_page(physmap[i]); pa < end; pa += PAGE_SIZE) {
1340 int tmp, page_bad, full;
1341 int *ptr = (int *)CADDR1;
1345 * block out kernel memory as not available.
1347 if (pa >= (vm_paddr_t)kernphys && pa < first)
1351 * block out dcons buffer
1354 && pa >= trunc_page(dcons_addr)
1355 && pa < dcons_addr + dcons_size)
1363 * Print a "." every GB to show we're making
1367 if ((page_counter % PAGES_PER_GB) == 0)
1371 * map page into kernel: valid, read/write,non-cacheable
1373 *pte = pa | PG_V | PG_RW | PG_NC_PWT | PG_NC_PCD;
1378 * Test for alternating 1's and 0's
1380 *(volatile int *)ptr = 0xaaaaaaaa;
1381 if (*(volatile int *)ptr != 0xaaaaaaaa)
1384 * Test for alternating 0's and 1's
1386 *(volatile int *)ptr = 0x55555555;
1387 if (*(volatile int *)ptr != 0x55555555)
1392 *(volatile int *)ptr = 0xffffffff;
1393 if (*(volatile int *)ptr != 0xffffffff)
1398 *(volatile int *)ptr = 0x0;
1399 if (*(volatile int *)ptr != 0x0)
1402 * Restore original value.
1408 * Adjust array of valid/good pages.
1410 if (page_bad == TRUE)
1413 * If this good page is a continuation of the
1414 * previous set of good pages, then just increase
1415 * the end pointer. Otherwise start a new chunk.
1416 * Note that "end" points one higher than end,
1417 * making the range >= start and < end.
1418 * If we're also doing a speculative memory
1419 * test and we at or past the end, bump up Maxmem
1420 * so that we keep going. The first bad page
1421 * will terminate the loop.
1423 if (phys_avail[pa_indx] == pa) {
1424 phys_avail[pa_indx] += PAGE_SIZE;
1427 if (pa_indx == PHYS_AVAIL_ARRAY_END) {
1429 "Too many holes in the physical address space, giving up\n");
1434 phys_avail[pa_indx++] = pa; /* start */
1435 phys_avail[pa_indx] = pa + PAGE_SIZE; /* end */
1439 if (dump_avail[da_indx] == pa) {
1440 dump_avail[da_indx] += PAGE_SIZE;
1443 if (da_indx == DUMP_AVAIL_ARRAY_END) {
1447 dump_avail[da_indx++] = pa; /* start */
1448 dump_avail[da_indx] = pa + PAGE_SIZE; /* end */
1462 * The last chunk must contain at least one page plus the message
1463 * buffer to avoid complicating other code (message buffer address
1464 * calculation, etc.).
1466 while (phys_avail[pa_indx - 1] + PAGE_SIZE +
1467 round_page(msgbufsize) >= phys_avail[pa_indx]) {
1468 physmem -= atop(phys_avail[pa_indx] - phys_avail[pa_indx - 1]);
1469 phys_avail[pa_indx--] = 0;
1470 phys_avail[pa_indx--] = 0;
1473 Maxmem = atop(phys_avail[pa_indx]);
1475 /* Trim off space for the message buffer. */
1476 phys_avail[pa_indx] -= round_page(msgbufsize);
1478 /* Map the message buffer. */
1479 msgbufp = (struct msgbuf *)PHYS_TO_DMAP(phys_avail[pa_indx]);
1483 native_parse_preload_data(u_int64_t modulep)
1487 vm_offset_t ksym_start;
1488 vm_offset_t ksym_end;
1491 preload_metadata = (caddr_t)(uintptr_t)(modulep + KERNBASE);
1492 preload_bootstrap_relocate(KERNBASE);
1493 kmdp = preload_search_by_type("elf kernel");
1495 kmdp = preload_search_by_type("elf64 kernel");
1496 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
1497 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *) + KERNBASE;
1499 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
1500 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
1501 db_fetch_ksymtab(ksym_start, ksym_end);
1508 hammer_time(u_int64_t modulep, u_int64_t physfree)
1513 struct nmi_pcpu *np;
1514 struct xstate_hdr *xhdr;
1520 * This may be done better later if it gets more high level
1521 * components in it. If so just link td->td_proc here.
1523 proc_linkup0(&proc0, &thread0);
1525 kmdp = init_ops.parse_preload_data(modulep);
1527 /* Init basic tunables, hz etc */
1530 thread0.td_kstack = physfree + KERNBASE;
1531 thread0.td_kstack_pages = kstack_pages;
1532 kstack0_sz = thread0.td_kstack_pages * PAGE_SIZE;
1533 bzero((void *)thread0.td_kstack, kstack0_sz);
1534 physfree += kstack0_sz;
1537 * make gdt memory segments
1539 for (x = 0; x < NGDT; x++) {
1540 if (x != GPROC0_SEL && x != (GPROC0_SEL + 1) &&
1541 x != GUSERLDT_SEL && x != (GUSERLDT_SEL) + 1)
1542 ssdtosd(&gdt_segs[x], &gdt[x]);
1544 gdt_segs[GPROC0_SEL].ssd_base = (uintptr_t)&common_tss[0];
1545 ssdtosyssd(&gdt_segs[GPROC0_SEL],
1546 (struct system_segment_descriptor *)&gdt[GPROC0_SEL]);
1548 r_gdt.rd_limit = NGDT * sizeof(gdt[0]) - 1;
1549 r_gdt.rd_base = (long) gdt;
1553 wrmsr(MSR_FSBASE, 0); /* User value */
1554 wrmsr(MSR_GSBASE, (u_int64_t)pc);
1555 wrmsr(MSR_KGSBASE, 0); /* User value while in the kernel */
1557 pcpu_init(pc, 0, sizeof(struct pcpu));
1558 dpcpu_init((void *)(physfree + KERNBASE), 0);
1559 physfree += DPCPU_SIZE;
1560 PCPU_SET(prvspace, pc);
1561 PCPU_SET(curthread, &thread0);
1562 PCPU_SET(tssp, &common_tss[0]);
1563 PCPU_SET(commontssp, &common_tss[0]);
1564 PCPU_SET(tss, (struct system_segment_descriptor *)&gdt[GPROC0_SEL]);
1565 PCPU_SET(ldt, (struct system_segment_descriptor *)&gdt[GUSERLDT_SEL]);
1566 PCPU_SET(fs32p, &gdt[GUFS32_SEL]);
1567 PCPU_SET(gs32p, &gdt[GUGS32_SEL]);
1570 * Initialize mutexes.
1572 * icu_lock: in order to allow an interrupt to occur in a critical
1573 * section, to set pcpu->ipending (etc...) properly, we
1574 * must be able to get the icu lock, so it can't be
1578 mtx_init(&icu_lock, "icu", NULL, MTX_SPIN | MTX_NOWITNESS);
1579 mtx_init(&dt_lock, "descriptor tables", NULL, MTX_DEF);
1582 for (x = 0; x < NIDT; x++)
1583 setidt(x, &IDTVEC(rsvd), SDT_SYSIGT, SEL_KPL, 0);
1584 setidt(IDT_DE, &IDTVEC(div), SDT_SYSIGT, SEL_KPL, 0);
1585 setidt(IDT_DB, &IDTVEC(dbg), SDT_SYSIGT, SEL_KPL, 0);
1586 setidt(IDT_NMI, &IDTVEC(nmi), SDT_SYSIGT, SEL_KPL, 2);
1587 setidt(IDT_BP, &IDTVEC(bpt), SDT_SYSIGT, SEL_UPL, 0);
1588 setidt(IDT_OF, &IDTVEC(ofl), SDT_SYSIGT, SEL_KPL, 0);
1589 setidt(IDT_BR, &IDTVEC(bnd), SDT_SYSIGT, SEL_KPL, 0);
1590 setidt(IDT_UD, &IDTVEC(ill), SDT_SYSIGT, SEL_KPL, 0);
1591 setidt(IDT_NM, &IDTVEC(dna), SDT_SYSIGT, SEL_KPL, 0);
1592 setidt(IDT_DF, &IDTVEC(dblfault), SDT_SYSIGT, SEL_KPL, 1);
1593 setidt(IDT_FPUGP, &IDTVEC(fpusegm), SDT_SYSIGT, SEL_KPL, 0);
1594 setidt(IDT_TS, &IDTVEC(tss), SDT_SYSIGT, SEL_KPL, 0);
1595 setidt(IDT_NP, &IDTVEC(missing), SDT_SYSIGT, SEL_KPL, 0);
1596 setidt(IDT_SS, &IDTVEC(stk), SDT_SYSIGT, SEL_KPL, 0);
1597 setidt(IDT_GP, &IDTVEC(prot), SDT_SYSIGT, SEL_KPL, 0);
1598 setidt(IDT_PF, &IDTVEC(page), SDT_SYSIGT, SEL_KPL, 0);
1599 setidt(IDT_MF, &IDTVEC(fpu), SDT_SYSIGT, SEL_KPL, 0);
1600 setidt(IDT_AC, &IDTVEC(align), SDT_SYSIGT, SEL_KPL, 0);
1601 setidt(IDT_MC, &IDTVEC(mchk), SDT_SYSIGT, SEL_KPL, 0);
1602 setidt(IDT_XF, &IDTVEC(xmm), SDT_SYSIGT, SEL_KPL, 0);
1603 #ifdef KDTRACE_HOOKS
1604 setidt(IDT_DTRACE_RET, &IDTVEC(dtrace_ret), SDT_SYSIGT, SEL_UPL, 0);
1607 setidt(IDT_EVTCHN, &IDTVEC(xen_intr_upcall), SDT_SYSIGT, SEL_UPL, 0);
1610 r_idt.rd_limit = sizeof(idt0) - 1;
1611 r_idt.rd_base = (long) idt;
1615 * Initialize the clock before the console so that console
1616 * initialization can use DELAY().
1621 * Use vt(4) by default for UEFI boot (during the sc(4)/vt(4)
1624 if (preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_EFI_MAP)
1626 vty_set_preferred(VTY_VT);
1628 identify_cpu(); /* Final stage of CPU initialization */
1629 initializecpu(); /* Initialize CPU registers */
1630 initializecpucache();
1632 /* doublefault stack space, runs on ist1 */
1633 common_tss[0].tss_ist1 = (long)&dblfault_stack[sizeof(dblfault_stack)];
1636 * NMI stack, runs on ist2. The pcpu pointer is stored just
1637 * above the start of the ist2 stack.
1639 np = ((struct nmi_pcpu *) &nmi0_stack[sizeof(nmi0_stack)]) - 1;
1640 np->np_pcpu = (register_t) pc;
1641 common_tss[0].tss_ist2 = (long) np;
1643 /* Set the IO permission bitmap (empty due to tss seg limit) */
1644 common_tss[0].tss_iobase = sizeof(struct amd64tss) + IOPERM_BITMAP_SIZE;
1646 gsel_tss = GSEL(GPROC0_SEL, SEL_KPL);
1649 /* Set up the fast syscall stuff */
1650 msr = rdmsr(MSR_EFER) | EFER_SCE;
1651 wrmsr(MSR_EFER, msr);
1652 wrmsr(MSR_LSTAR, (u_int64_t)IDTVEC(fast_syscall));
1653 wrmsr(MSR_CSTAR, (u_int64_t)IDTVEC(fast_syscall32));
1654 msr = ((u_int64_t)GSEL(GCODE_SEL, SEL_KPL) << 32) |
1655 ((u_int64_t)GSEL(GUCODE32_SEL, SEL_UPL) << 48);
1656 wrmsr(MSR_STAR, msr);
1657 wrmsr(MSR_SF_MASK, PSL_NT|PSL_T|PSL_I|PSL_C|PSL_D);
1659 getmemsize(kmdp, physfree);
1660 init_param2(physmem);
1662 /* now running on new page tables, configured,and u/iom is accessible */
1671 /* Reset and mask the atpics and leave them shut down. */
1675 * Point the ICU spurious interrupt vectors at the APIC spurious
1676 * interrupt handler.
1678 setidt(IDT_IO_INTS + 7, IDTVEC(spuriousint), SDT_SYSIGT, SEL_KPL, 0);
1679 setidt(IDT_IO_INTS + 15, IDTVEC(spuriousint), SDT_SYSIGT, SEL_KPL, 0);
1682 #error "have you forgotten the isa device?";
1688 if (boothowto & RB_KDB)
1689 kdb_enter(KDB_WHY_BOOTFLAGS,
1690 "Boot flags requested debugger");
1693 msgbufinit(msgbufp, msgbufsize);
1697 * Set up thread0 pcb after fpuinit calculated pcb + fpu save
1698 * area size. Zero out the extended state header in fpu save
1701 thread0.td_pcb = get_pcb_td(&thread0);
1702 bzero(get_pcb_user_save_td(&thread0), cpu_max_ext_state_size);
1704 xhdr = (struct xstate_hdr *)(get_pcb_user_save_td(&thread0) +
1706 xhdr->xstate_bv = xsave_mask;
1708 /* make an initial tss so cpu can get interrupt stack on syscall! */
1709 common_tss[0].tss_rsp0 = (vm_offset_t)thread0.td_pcb;
1710 /* Ensure the stack is aligned to 16 bytes */
1711 common_tss[0].tss_rsp0 &= ~0xFul;
1712 PCPU_SET(rsp0, common_tss[0].tss_rsp0);
1713 PCPU_SET(curpcb, thread0.td_pcb);
1715 /* transfer to user mode */
1717 _ucodesel = GSEL(GUCODE_SEL, SEL_UPL);
1718 _udatasel = GSEL(GUDATA_SEL, SEL_UPL);
1719 _ucode32sel = GSEL(GUCODE32_SEL, SEL_UPL);
1720 _ufssel = GSEL(GUFS32_SEL, SEL_UPL);
1721 _ugssel = GSEL(GUGS32_SEL, SEL_UPL);
1727 /* setup proc 0's pcb */
1728 thread0.td_pcb->pcb_flags = 0;
1729 thread0.td_frame = &proc0_tf;
1731 env = kern_getenv("kernelname");
1733 strlcpy(kernelname, env, sizeof(kernelname));
1741 /* Location of kernel stack for locore */
1742 return ((u_int64_t)thread0.td_pcb);
1746 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
1749 pcpu->pc_acpi_id = 0xffffffff;
1753 smap_sysctl_handler(SYSCTL_HANDLER_ARGS)
1755 struct bios_smap *smapbase;
1756 struct bios_smap_xattr smap;
1759 int count, error, i;
1761 /* Retrieve the system memory map from the loader. */
1762 kmdp = preload_search_by_type("elf kernel");
1764 kmdp = preload_search_by_type("elf64 kernel");
1765 smapbase = (struct bios_smap *)preload_search_info(kmdp,
1766 MODINFO_METADATA | MODINFOMD_SMAP);
1767 if (smapbase == NULL)
1769 smapattr = (uint32_t *)preload_search_info(kmdp,
1770 MODINFO_METADATA | MODINFOMD_SMAP_XATTR);
1771 count = *((uint32_t *)smapbase - 1) / sizeof(*smapbase);
1773 for (i = 0; i < count; i++) {
1774 smap.base = smapbase[i].base;
1775 smap.length = smapbase[i].length;
1776 smap.type = smapbase[i].type;
1777 if (smapattr != NULL)
1778 smap.xattr = smapattr[i];
1781 error = SYSCTL_OUT(req, &smap, sizeof(smap));
1785 SYSCTL_PROC(_machdep, OID_AUTO, smap, CTLTYPE_OPAQUE|CTLFLAG_RD, NULL, 0,
1786 smap_sysctl_handler, "S,bios_smap_xattr", "Raw BIOS SMAP data");
1789 efi_map_sysctl_handler(SYSCTL_HANDLER_ARGS)
1791 struct efi_map_header *efihdr;
1795 kmdp = preload_search_by_type("elf kernel");
1797 kmdp = preload_search_by_type("elf64 kernel");
1798 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
1799 MODINFO_METADATA | MODINFOMD_EFI_MAP);
1802 efisize = *((uint32_t *)efihdr - 1);
1803 return (SYSCTL_OUT(req, efihdr, efisize));
1805 SYSCTL_PROC(_machdep, OID_AUTO, efi_map, CTLTYPE_OPAQUE|CTLFLAG_RD, NULL, 0,
1806 efi_map_sysctl_handler, "S,efi_map_header", "Raw EFI Memory Map");
1809 spinlock_enter(void)
1815 if (td->td_md.md_spinlock_count == 0) {
1816 flags = intr_disable();
1817 td->td_md.md_spinlock_count = 1;
1818 td->td_md.md_saved_flags = flags;
1820 td->td_md.md_spinlock_count++;
1832 flags = td->td_md.md_saved_flags;
1833 td->td_md.md_spinlock_count--;
1834 if (td->td_md.md_spinlock_count == 0)
1835 intr_restore(flags);
1839 * Construct a PCB from a trapframe. This is called from kdb_trap() where
1840 * we want to start a backtrace from the function that caused us to enter
1841 * the debugger. We have the context in the trapframe, but base the trace
1842 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
1843 * enough for a backtrace.
1846 makectx(struct trapframe *tf, struct pcb *pcb)
1849 pcb->pcb_r12 = tf->tf_r12;
1850 pcb->pcb_r13 = tf->tf_r13;
1851 pcb->pcb_r14 = tf->tf_r14;
1852 pcb->pcb_r15 = tf->tf_r15;
1853 pcb->pcb_rbp = tf->tf_rbp;
1854 pcb->pcb_rbx = tf->tf_rbx;
1855 pcb->pcb_rip = tf->tf_rip;
1856 pcb->pcb_rsp = tf->tf_rsp;
1860 ptrace_set_pc(struct thread *td, unsigned long addr)
1863 td->td_frame->tf_rip = addr;
1864 set_pcb_flags(td->td_pcb, PCB_FULL_IRET);
1869 ptrace_single_step(struct thread *td)
1871 td->td_frame->tf_rflags |= PSL_T;
1876 ptrace_clear_single_step(struct thread *td)
1878 td->td_frame->tf_rflags &= ~PSL_T;
1883 fill_regs(struct thread *td, struct reg *regs)
1885 struct trapframe *tp;
1888 return (fill_frame_regs(tp, regs));
1892 fill_frame_regs(struct trapframe *tp, struct reg *regs)
1894 regs->r_r15 = tp->tf_r15;
1895 regs->r_r14 = tp->tf_r14;
1896 regs->r_r13 = tp->tf_r13;
1897 regs->r_r12 = tp->tf_r12;
1898 regs->r_r11 = tp->tf_r11;
1899 regs->r_r10 = tp->tf_r10;
1900 regs->r_r9 = tp->tf_r9;
1901 regs->r_r8 = tp->tf_r8;
1902 regs->r_rdi = tp->tf_rdi;
1903 regs->r_rsi = tp->tf_rsi;
1904 regs->r_rbp = tp->tf_rbp;
1905 regs->r_rbx = tp->tf_rbx;
1906 regs->r_rdx = tp->tf_rdx;
1907 regs->r_rcx = tp->tf_rcx;
1908 regs->r_rax = tp->tf_rax;
1909 regs->r_rip = tp->tf_rip;
1910 regs->r_cs = tp->tf_cs;
1911 regs->r_rflags = tp->tf_rflags;
1912 regs->r_rsp = tp->tf_rsp;
1913 regs->r_ss = tp->tf_ss;
1914 if (tp->tf_flags & TF_HASSEGS) {
1915 regs->r_ds = tp->tf_ds;
1916 regs->r_es = tp->tf_es;
1917 regs->r_fs = tp->tf_fs;
1918 regs->r_gs = tp->tf_gs;
1929 set_regs(struct thread *td, struct reg *regs)
1931 struct trapframe *tp;
1935 rflags = regs->r_rflags & 0xffffffff;
1936 if (!EFL_SECURE(rflags, tp->tf_rflags) || !CS_SECURE(regs->r_cs))
1938 tp->tf_r15 = regs->r_r15;
1939 tp->tf_r14 = regs->r_r14;
1940 tp->tf_r13 = regs->r_r13;
1941 tp->tf_r12 = regs->r_r12;
1942 tp->tf_r11 = regs->r_r11;
1943 tp->tf_r10 = regs->r_r10;
1944 tp->tf_r9 = regs->r_r9;
1945 tp->tf_r8 = regs->r_r8;
1946 tp->tf_rdi = regs->r_rdi;
1947 tp->tf_rsi = regs->r_rsi;
1948 tp->tf_rbp = regs->r_rbp;
1949 tp->tf_rbx = regs->r_rbx;
1950 tp->tf_rdx = regs->r_rdx;
1951 tp->tf_rcx = regs->r_rcx;
1952 tp->tf_rax = regs->r_rax;
1953 tp->tf_rip = regs->r_rip;
1954 tp->tf_cs = regs->r_cs;
1955 tp->tf_rflags = rflags;
1956 tp->tf_rsp = regs->r_rsp;
1957 tp->tf_ss = regs->r_ss;
1958 if (0) { /* XXXKIB */
1959 tp->tf_ds = regs->r_ds;
1960 tp->tf_es = regs->r_es;
1961 tp->tf_fs = regs->r_fs;
1962 tp->tf_gs = regs->r_gs;
1963 tp->tf_flags = TF_HASSEGS;
1965 set_pcb_flags(td->td_pcb, PCB_FULL_IRET);
1969 /* XXX check all this stuff! */
1970 /* externalize from sv_xmm */
1972 fill_fpregs_xmm(struct savefpu *sv_xmm, struct fpreg *fpregs)
1974 struct envxmm *penv_fpreg = (struct envxmm *)&fpregs->fpr_env;
1975 struct envxmm *penv_xmm = &sv_xmm->sv_env;
1979 bzero(fpregs, sizeof(*fpregs));
1981 /* FPU control/status */
1982 penv_fpreg->en_cw = penv_xmm->en_cw;
1983 penv_fpreg->en_sw = penv_xmm->en_sw;
1984 penv_fpreg->en_tw = penv_xmm->en_tw;
1985 penv_fpreg->en_opcode = penv_xmm->en_opcode;
1986 penv_fpreg->en_rip = penv_xmm->en_rip;
1987 penv_fpreg->en_rdp = penv_xmm->en_rdp;
1988 penv_fpreg->en_mxcsr = penv_xmm->en_mxcsr;
1989 penv_fpreg->en_mxcsr_mask = penv_xmm->en_mxcsr_mask;
1992 for (i = 0; i < 8; ++i)
1993 bcopy(sv_xmm->sv_fp[i].fp_acc.fp_bytes, fpregs->fpr_acc[i], 10);
1996 for (i = 0; i < 16; ++i)
1997 bcopy(sv_xmm->sv_xmm[i].xmm_bytes, fpregs->fpr_xacc[i], 16);
2000 /* internalize from fpregs into sv_xmm */
2002 set_fpregs_xmm(struct fpreg *fpregs, struct savefpu *sv_xmm)
2004 struct envxmm *penv_xmm = &sv_xmm->sv_env;
2005 struct envxmm *penv_fpreg = (struct envxmm *)&fpregs->fpr_env;
2009 /* FPU control/status */
2010 penv_xmm->en_cw = penv_fpreg->en_cw;
2011 penv_xmm->en_sw = penv_fpreg->en_sw;
2012 penv_xmm->en_tw = penv_fpreg->en_tw;
2013 penv_xmm->en_opcode = penv_fpreg->en_opcode;
2014 penv_xmm->en_rip = penv_fpreg->en_rip;
2015 penv_xmm->en_rdp = penv_fpreg->en_rdp;
2016 penv_xmm->en_mxcsr = penv_fpreg->en_mxcsr;
2017 penv_xmm->en_mxcsr_mask = penv_fpreg->en_mxcsr_mask & cpu_mxcsr_mask;
2020 for (i = 0; i < 8; ++i)
2021 bcopy(fpregs->fpr_acc[i], sv_xmm->sv_fp[i].fp_acc.fp_bytes, 10);
2024 for (i = 0; i < 16; ++i)
2025 bcopy(fpregs->fpr_xacc[i], sv_xmm->sv_xmm[i].xmm_bytes, 16);
2028 /* externalize from td->pcb */
2030 fill_fpregs(struct thread *td, struct fpreg *fpregs)
2033 KASSERT(td == curthread || TD_IS_SUSPENDED(td) ||
2034 P_SHOULDSTOP(td->td_proc),
2035 ("not suspended thread %p", td));
2037 fill_fpregs_xmm(get_pcb_user_save_td(td), fpregs);
2041 /* internalize to td->pcb */
2043 set_fpregs(struct thread *td, struct fpreg *fpregs)
2046 set_fpregs_xmm(fpregs, get_pcb_user_save_td(td));
2052 * Get machine context.
2055 get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
2058 struct trapframe *tp;
2062 PROC_LOCK(curthread->td_proc);
2063 mcp->mc_onstack = sigonstack(tp->tf_rsp);
2064 PROC_UNLOCK(curthread->td_proc);
2065 mcp->mc_r15 = tp->tf_r15;
2066 mcp->mc_r14 = tp->tf_r14;
2067 mcp->mc_r13 = tp->tf_r13;
2068 mcp->mc_r12 = tp->tf_r12;
2069 mcp->mc_r11 = tp->tf_r11;
2070 mcp->mc_r10 = tp->tf_r10;
2071 mcp->mc_r9 = tp->tf_r9;
2072 mcp->mc_r8 = tp->tf_r8;
2073 mcp->mc_rdi = tp->tf_rdi;
2074 mcp->mc_rsi = tp->tf_rsi;
2075 mcp->mc_rbp = tp->tf_rbp;
2076 mcp->mc_rbx = tp->tf_rbx;
2077 mcp->mc_rcx = tp->tf_rcx;
2078 mcp->mc_rflags = tp->tf_rflags;
2079 if (flags & GET_MC_CLEAR_RET) {
2082 mcp->mc_rflags &= ~PSL_C;
2084 mcp->mc_rax = tp->tf_rax;
2085 mcp->mc_rdx = tp->tf_rdx;
2087 mcp->mc_rip = tp->tf_rip;
2088 mcp->mc_cs = tp->tf_cs;
2089 mcp->mc_rsp = tp->tf_rsp;
2090 mcp->mc_ss = tp->tf_ss;
2091 mcp->mc_ds = tp->tf_ds;
2092 mcp->mc_es = tp->tf_es;
2093 mcp->mc_fs = tp->tf_fs;
2094 mcp->mc_gs = tp->tf_gs;
2095 mcp->mc_flags = tp->tf_flags;
2096 mcp->mc_len = sizeof(*mcp);
2097 get_fpcontext(td, mcp, NULL, 0);
2098 mcp->mc_fsbase = pcb->pcb_fsbase;
2099 mcp->mc_gsbase = pcb->pcb_gsbase;
2100 mcp->mc_xfpustate = 0;
2101 mcp->mc_xfpustate_len = 0;
2102 bzero(mcp->mc_spare, sizeof(mcp->mc_spare));
2107 * Set machine context.
2109 * However, we don't set any but the user modifiable flags, and we won't
2110 * touch the cs selector.
2113 set_mcontext(struct thread *td, mcontext_t *mcp)
2116 struct trapframe *tp;
2123 if (mcp->mc_len != sizeof(*mcp) ||
2124 (mcp->mc_flags & ~_MC_FLAG_MASK) != 0)
2126 rflags = (mcp->mc_rflags & PSL_USERCHANGE) |
2127 (tp->tf_rflags & ~PSL_USERCHANGE);
2128 if (mcp->mc_flags & _MC_HASFPXSTATE) {
2129 if (mcp->mc_xfpustate_len > cpu_max_ext_state_size -
2130 sizeof(struct savefpu))
2132 xfpustate = __builtin_alloca(mcp->mc_xfpustate_len);
2133 ret = copyin((void *)mcp->mc_xfpustate, xfpustate,
2134 mcp->mc_xfpustate_len);
2139 ret = set_fpcontext(td, mcp, xfpustate, mcp->mc_xfpustate_len);
2142 tp->tf_r15 = mcp->mc_r15;
2143 tp->tf_r14 = mcp->mc_r14;
2144 tp->tf_r13 = mcp->mc_r13;
2145 tp->tf_r12 = mcp->mc_r12;
2146 tp->tf_r11 = mcp->mc_r11;
2147 tp->tf_r10 = mcp->mc_r10;
2148 tp->tf_r9 = mcp->mc_r9;
2149 tp->tf_r8 = mcp->mc_r8;
2150 tp->tf_rdi = mcp->mc_rdi;
2151 tp->tf_rsi = mcp->mc_rsi;
2152 tp->tf_rbp = mcp->mc_rbp;
2153 tp->tf_rbx = mcp->mc_rbx;
2154 tp->tf_rdx = mcp->mc_rdx;
2155 tp->tf_rcx = mcp->mc_rcx;
2156 tp->tf_rax = mcp->mc_rax;
2157 tp->tf_rip = mcp->mc_rip;
2158 tp->tf_rflags = rflags;
2159 tp->tf_rsp = mcp->mc_rsp;
2160 tp->tf_ss = mcp->mc_ss;
2161 tp->tf_flags = mcp->mc_flags;
2162 if (tp->tf_flags & TF_HASSEGS) {
2163 tp->tf_ds = mcp->mc_ds;
2164 tp->tf_es = mcp->mc_es;
2165 tp->tf_fs = mcp->mc_fs;
2166 tp->tf_gs = mcp->mc_gs;
2168 if (mcp->mc_flags & _MC_HASBASES) {
2169 pcb->pcb_fsbase = mcp->mc_fsbase;
2170 pcb->pcb_gsbase = mcp->mc_gsbase;
2172 set_pcb_flags(pcb, PCB_FULL_IRET);
2177 get_fpcontext(struct thread *td, mcontext_t *mcp, char *xfpusave,
2178 size_t xfpusave_len)
2180 size_t max_len, len;
2182 mcp->mc_ownedfp = fpugetregs(td);
2183 bcopy(get_pcb_user_save_td(td), &mcp->mc_fpstate[0],
2184 sizeof(mcp->mc_fpstate));
2185 mcp->mc_fpformat = fpuformat();
2186 if (!use_xsave || xfpusave_len == 0)
2188 max_len = cpu_max_ext_state_size - sizeof(struct savefpu);
2190 if (len > max_len) {
2192 bzero(xfpusave + max_len, len - max_len);
2194 mcp->mc_flags |= _MC_HASFPXSTATE;
2195 mcp->mc_xfpustate_len = len;
2196 bcopy(get_pcb_user_save_td(td) + 1, xfpusave, len);
2200 set_fpcontext(struct thread *td, mcontext_t *mcp, char *xfpustate,
2201 size_t xfpustate_len)
2203 struct savefpu *fpstate;
2206 if (mcp->mc_fpformat == _MC_FPFMT_NODEV)
2208 else if (mcp->mc_fpformat != _MC_FPFMT_XMM)
2210 else if (mcp->mc_ownedfp == _MC_FPOWNED_NONE) {
2211 /* We don't care what state is left in the FPU or PCB. */
2214 } else if (mcp->mc_ownedfp == _MC_FPOWNED_FPU ||
2215 mcp->mc_ownedfp == _MC_FPOWNED_PCB) {
2216 fpstate = (struct savefpu *)&mcp->mc_fpstate;
2217 fpstate->sv_env.en_mxcsr &= cpu_mxcsr_mask;
2218 error = fpusetregs(td, fpstate, xfpustate, xfpustate_len);
2225 fpstate_drop(struct thread *td)
2228 KASSERT(PCB_USER_FPU(td->td_pcb), ("fpstate_drop: kernel-owned fpu"));
2230 if (PCPU_GET(fpcurthread) == td)
2233 * XXX force a full drop of the fpu. The above only drops it if we
2236 * XXX I don't much like fpugetuserregs()'s semantics of doing a full
2237 * drop. Dropping only to the pcb matches fnsave's behaviour.
2238 * We only need to drop to !PCB_INITDONE in sendsig(). But
2239 * sendsig() is the only caller of fpugetuserregs()... perhaps we just
2240 * have too many layers.
2242 clear_pcb_flags(curthread->td_pcb,
2243 PCB_FPUINITDONE | PCB_USERFPUINITDONE);
2248 fill_dbregs(struct thread *td, struct dbreg *dbregs)
2253 dbregs->dr[0] = rdr0();
2254 dbregs->dr[1] = rdr1();
2255 dbregs->dr[2] = rdr2();
2256 dbregs->dr[3] = rdr3();
2257 dbregs->dr[6] = rdr6();
2258 dbregs->dr[7] = rdr7();
2261 dbregs->dr[0] = pcb->pcb_dr0;
2262 dbregs->dr[1] = pcb->pcb_dr1;
2263 dbregs->dr[2] = pcb->pcb_dr2;
2264 dbregs->dr[3] = pcb->pcb_dr3;
2265 dbregs->dr[6] = pcb->pcb_dr6;
2266 dbregs->dr[7] = pcb->pcb_dr7;
2282 set_dbregs(struct thread *td, struct dbreg *dbregs)
2288 load_dr0(dbregs->dr[0]);
2289 load_dr1(dbregs->dr[1]);
2290 load_dr2(dbregs->dr[2]);
2291 load_dr3(dbregs->dr[3]);
2292 load_dr6(dbregs->dr[6]);
2293 load_dr7(dbregs->dr[7]);
2296 * Don't let an illegal value for dr7 get set. Specifically,
2297 * check for undefined settings. Setting these bit patterns
2298 * result in undefined behaviour and can lead to an unexpected
2299 * TRCTRAP or a general protection fault right here.
2300 * Upper bits of dr6 and dr7 must not be set
2302 for (i = 0; i < 4; i++) {
2303 if (DBREG_DR7_ACCESS(dbregs->dr[7], i) == 0x02)
2305 if (td->td_frame->tf_cs == _ucode32sel &&
2306 DBREG_DR7_LEN(dbregs->dr[7], i) == DBREG_DR7_LEN_8)
2309 if ((dbregs->dr[6] & 0xffffffff00000000ul) != 0 ||
2310 (dbregs->dr[7] & 0xffffffff00000000ul) != 0)
2316 * Don't let a process set a breakpoint that is not within the
2317 * process's address space. If a process could do this, it
2318 * could halt the system by setting a breakpoint in the kernel
2319 * (if ddb was enabled). Thus, we need to check to make sure
2320 * that no breakpoints are being enabled for addresses outside
2321 * process's address space.
2323 * XXX - what about when the watched area of the user's
2324 * address space is written into from within the kernel
2325 * ... wouldn't that still cause a breakpoint to be generated
2326 * from within kernel mode?
2329 if (DBREG_DR7_ENABLED(dbregs->dr[7], 0)) {
2330 /* dr0 is enabled */
2331 if (dbregs->dr[0] >= VM_MAXUSER_ADDRESS)
2334 if (DBREG_DR7_ENABLED(dbregs->dr[7], 1)) {
2335 /* dr1 is enabled */
2336 if (dbregs->dr[1] >= VM_MAXUSER_ADDRESS)
2339 if (DBREG_DR7_ENABLED(dbregs->dr[7], 2)) {
2340 /* dr2 is enabled */
2341 if (dbregs->dr[2] >= VM_MAXUSER_ADDRESS)
2344 if (DBREG_DR7_ENABLED(dbregs->dr[7], 3)) {
2345 /* dr3 is enabled */
2346 if (dbregs->dr[3] >= VM_MAXUSER_ADDRESS)
2350 pcb->pcb_dr0 = dbregs->dr[0];
2351 pcb->pcb_dr1 = dbregs->dr[1];
2352 pcb->pcb_dr2 = dbregs->dr[2];
2353 pcb->pcb_dr3 = dbregs->dr[3];
2354 pcb->pcb_dr6 = dbregs->dr[6];
2355 pcb->pcb_dr7 = dbregs->dr[7];
2357 set_pcb_flags(pcb, PCB_DBREGS);
2367 load_dr7(0); /* Turn off the control bits first */
2376 * Return > 0 if a hardware breakpoint has been hit, and the
2377 * breakpoint was in user space. Return 0, otherwise.
2380 user_dbreg_trap(void)
2382 u_int64_t dr7, dr6; /* debug registers dr6 and dr7 */
2383 u_int64_t bp; /* breakpoint bits extracted from dr6 */
2384 int nbp; /* number of breakpoints that triggered */
2385 caddr_t addr[4]; /* breakpoint addresses */
2389 if ((dr7 & 0x000000ff) == 0) {
2391 * all GE and LE bits in the dr7 register are zero,
2392 * thus the trap couldn't have been caused by the
2393 * hardware debug registers
2400 bp = dr6 & 0x0000000f;
2404 * None of the breakpoint bits are set meaning this
2405 * trap was not caused by any of the debug registers
2411 * at least one of the breakpoints were hit, check to see
2412 * which ones and if any of them are user space addresses
2416 addr[nbp++] = (caddr_t)rdr0();
2419 addr[nbp++] = (caddr_t)rdr1();
2422 addr[nbp++] = (caddr_t)rdr2();
2425 addr[nbp++] = (caddr_t)rdr3();
2428 for (i = 0; i < nbp; i++) {
2429 if (addr[i] < (caddr_t)VM_MAXUSER_ADDRESS) {
2431 * addr[i] is in user space
2438 * None of the breakpoints are in user space.
2446 * Provide inb() and outb() as functions. They are normally only available as
2447 * inline functions, thus cannot be called from the debugger.
2450 /* silence compiler warnings */
2451 u_char inb_(u_short);
2452 void outb_(u_short, u_char);
2461 outb_(u_short port, u_char data)