1 /* Live and postmortem kernel debugging functions for FreeBSD.
2 Copyright 1996 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 /* $FreeBSD: src/gnu/usr.bin/binutils/gdb/i386/kvm-fbsd.c,v 1.17.4.3 2001/12/17 23:06:06 peter Exp $ */
21 /* $DragonFly: src/gnu/usr.bin/binutils/gdb/i386/Attic/kvm-fbsd.c,v 1.3 2003/07/13 07:13:51 dillon Exp $ */
29 #include <sys/sysctl.h>
30 #include <sys/param.h>
34 #include <sys/globaldata.h>
35 #include "frame.h" /* required by inferior.h */
47 #include <vm/vm_param.h>
49 #include <machine/vmparam.h>
50 #include <machine/pcb.h>
51 #include <machine/tss.h>
52 #include <machine/frame.h>
53 #include <machine/globaldata.h>
55 static void kcore_files_info PARAMS ((struct target_ops *));
57 static void kcore_close PARAMS ((int));
59 static void get_kcore_registers PARAMS ((int));
61 static int kcore_xfer_kmem PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
63 static int xfer_umem PARAMS ((CORE_ADDR, char *, int, int));
65 static CORE_ADDR ksym_lookup PARAMS ((const char *));
67 static int read_pcb PARAMS ((int, CORE_ADDR));
69 static struct proc * curProc PARAMS ((void));
71 static int set_proc_context PARAMS ((CORE_ADDR paddr));
73 static void kcore_open PARAMS ((char *filename, int from_tty));
75 static void kcore_detach PARAMS ((char *args, int from_tty));
77 static void set_proc_cmd PARAMS ((char *arg, int from_tty));
79 static void set_cpu_cmd PARAMS ((char *arg, int from_tty));
81 static CORE_ADDR kvtophys PARAMS ((int, CORE_ADDR));
83 static int physrd PARAMS ((int, u_int, char*, int));
85 static int kvm_open PARAMS ((const char *efile, char *cfile, char *sfile,
86 int perm, char *errout));
88 static int kvm_close PARAMS ((int fd));
90 static int kvm_write PARAMS ((int core_kd, CORE_ADDR memaddr,
91 char *myaddr, int len));
93 static int kvm_read PARAMS ((int core_kd, CORE_ADDR memaddr,
94 char *myaddr, int len));
96 static int kvm_uread PARAMS ((int core_kd, struct proc *p,
97 CORE_ADDR memaddr, char *myaddr,
100 static int kernel_core_file_hook PARAMS ((int fd, CORE_ADDR addr,
101 char *buf, int len));
103 static struct kinfo_proc * kvm_getprocs PARAMS ((int cfd, int op,
104 CORE_ADDR proc, int *cnt));
106 extern struct target_ops kcore_ops; /* Forward decl */
108 /* Non-zero means we are debugging a kernel core file */
109 int kernel_debugging = 0;
110 int kernel_writablecore = 0;
112 static char *core_file;
113 static int core_kd = -1;
114 static struct proc *cur_proc;
115 static CORE_ADDR kernel_start;
119 static CORE_ADDR prv_space; /* per-cpu private space */
120 static int prv_space_size;
121 #define prv_start (prv_space + cpuid * prv_space_size)
124 * Read the "thing" at kernel address 'addr' into the space pointed to
125 * by point. The length of the "thing" is determined by the type of p.
126 * Result is non-zero if transfer fails.
128 #define kvread(addr, p) \
129 (target_read_memory ((CORE_ADDR)(addr), (char *)(p), sizeof(*(p))))
134 * The following is FreeBSD-specific hackery to decode special frames
135 * and elide the assembly-language stub. This could be made faster by
136 * defining a frame_type field in the machine-dependent frame information,
137 * but we don't think that's too important right now.
139 enum frametype { tf_normal, tf_trap, tf_interrupt, tf_syscall };
142 fbsd_kern_frame_saved_pc (fr)
143 struct frame_info *fr;
145 struct minimal_symbol *sym;
146 CORE_ADDR this_saved_pc;
147 enum frametype frametype;
149 this_saved_pc = read_memory_integer (fr->frame + 4, 4);
150 sym = lookup_minimal_symbol_by_pc (this_saved_pc);
151 frametype = tf_normal;
153 if (strcmp (SYMBOL_NAME(sym), "calltrap") == 0)
155 else if (strncmp (SYMBOL_NAME(sym), "Xresume", 7) == 0)
156 frametype = tf_interrupt;
157 else if (strcmp (SYMBOL_NAME(sym), "Xsyscall") == 0)
158 frametype = tf_syscall;
163 return (this_saved_pc);
165 #define oEIP offsetof(struct trapframe, tf_eip)
168 return (read_memory_integer (fr->frame + 8 + oEIP, 4));
171 return (read_memory_integer (fr->frame + 16 + oEIP, 4));
174 return (read_memory_integer (fr->frame + 8 + oEIP, 4));
183 struct minimal_symbol *sym;
185 sym = lookup_minimal_symbol (name, NULL, NULL);
187 error ("kernel symbol `%s' not found.", name);
189 return SYMBOL_VALUE_ADDRESS (sym);
195 CORE_ADDR td_ptr_addr;
197 CORE_ADDR p_ptr_addr;
200 td_ptr_addr = prv_start + offsetof(struct mdglobaldata, mi.gd_curthread);
201 if (kvread(td_ptr_addr, &td_ptr) != 0)
202 error ("cannot read thread pointer at %08x\n", td_ptr_addr);
203 p_ptr_addr = td_ptr + offsetof(struct thread, td_proc);
204 if (kvread(p_ptr_addr, &p_ptr) != 0)
205 error ("cannot read proc pointer at %08x\n", p_ptr_addr);
206 return((void *)p_ptr);
210 * Set the process context to that of the proc structure at
211 * system address paddr.
214 set_proc_context (paddr)
219 if (paddr < kernel_start)
222 cur_proc = (struct proc *)paddr;
224 set_kernel_boundaries (cur_proc);
227 /* Fetch all registers from core file */
228 target_fetch_registers (-1);
230 /* Now, set up the frame cache, and print the top of stack */
231 flush_cached_frames ();
232 set_current_frame (create_new_frame (read_fp (), read_pc ()));
233 select_frame (get_current_frame (), 0);
237 /* Discard all vestiges of any previous core file
238 and mark data and stack spaces as empty. */
242 kcore_close (quitting)
245 inferior_pid = 0; /* Avoid confusion from thread stuff */
256 /* This routine opens and sets up the core file bfd */
259 kcore_open (filename, from_tty)
264 struct cleanup *old_chain;
270 target_preopen (from_tty);
272 unpush_target (&kcore_ops);
277 error ( (core_kd >= 0)?
278 "No core file specified. (Use `detach' to stop debugging a core file.)"
279 : "No core file specified.");
282 filename = tilde_expand (filename);
283 if (filename[0] != '/')
285 cp = concat (current_directory, "/", filename, NULL);
290 old_chain = make_cleanup (free, filename);
293 * gdb doesn't really do anything if the exec-file couldn't
294 * be opened (in that case exec_bfd is NULL). Usually that's
295 * no big deal, but kvm_open needs the exec-file's name,
296 * which results in dereferencing a NULL pointer, a real NO-NO !
297 * So, check here if the open of the exec-file succeeded.
299 if (exec_bfd == NULL) /* the open failed */
300 error ("kgdb could not open the exec-file, please check the name you used !");
302 core_kd = kvm_open (exec_bfd->filename, filename, NULL,
303 kernel_writablecore? O_RDWR : O_RDONLY, "kgdb: ");
305 perror_with_name (filename);
307 /* Looks semi-reasonable. Toss the old core file and work on the new. */
309 discard_cleanups (old_chain); /* Don't free filename any more */
310 core_file = filename;
311 ontop = !push_target (&kcore_ops);
313 kernel_start = bfd_get_start_address (exec_bfd); /* XXX */
315 /* print out the panic string if there is one */
316 if (kvread (ksym_lookup ("panicstr"), &addr) == 0
318 && target_read_memory (addr, buf, sizeof (buf)) == 0)
320 for (cp = buf; cp < &buf[sizeof (buf)] && *cp; cp++)
321 if (!isascii (*cp) || (!isprint (*cp) && !isspace (*cp)))
325 printf ("panicstr: %s\n", buf);
328 /* Print all the panic messages if possible. */
329 if (symfile_objfile != NULL)
331 printf ("panic messages:\n---\n");
332 snprintf (buf, sizeof buf,
333 "/sbin/dmesg -N %s -M %s | \
334 /usr/bin/awk '/^(panic:|Fatal trap) / { printing = 1 } \
335 { if (printing) print $0 }'",
336 symfile_objfile->name, filename);
344 warning ("you won't be able to access this core file until you terminate\n\
345 your %s; do ``info files''", target_longname);
349 /* we may need this later */
350 cur_proc = (struct proc *)curProc ();
351 /* Now, set up the frame cache, and print the top of stack */
352 flush_cached_frames ();
353 set_current_frame (create_new_frame (read_fp (), read_pc ()));
354 select_frame (get_current_frame (), 0);
355 print_stack_frame (selected_frame, selected_frame_level, 1);
359 kcore_detach (args, from_tty)
364 error ("Too many arguments");
365 unpush_target (&kcore_ops);
366 reinit_frame_cache ();
368 printf_filtered ("No kernel core file now.\n");
371 /* Get the registers out of a core file. This is the machine-
372 independent part. Fetch_core_registers is the machine-dependent
373 part, typically implemented in the xm-file for each architecture. */
375 /* We just get all the registers, so we don't use regno. */
378 #define PCB_ADDR(uptr) ((char *)uptr + UPAGES * PAGE_SIZE - sizeof(struct pcb))
381 get_kcore_registers (int regno)
387 /* find the pcb for the current process */
388 if (cur_proc == NULL)
389 error ("cur_proc is NULL");
390 if (kvread(&cur_proc->p_thread, &td))
391 error ("cannot read cur_proc->p_thread at %p", cur_proc);
392 if (kvread(&td->td_pcb, &pcb))
393 error ("cannot read cur_proc->p_thread->td_pcb at %p", td);
394 if (read_pcb(core_kd, (CORE_ADDR)pcb) < 0)
395 error ("cannot read pcb at %p", pcb);
400 struct target_ops *t;
402 printf ("\t`%s'\n", core_file);
408 static CORE_ADDR maxuseraddr;
409 struct minimal_symbol *sym;
411 if (maxuseraddr == 0)
413 sym = lookup_minimal_symbol ("PTmap", NULL, NULL);
415 maxuseraddr = VM_MAXUSER_ADDRESS;
417 maxuseraddr = SYMBOL_VALUE_ADDRESS (sym);
424 kcore_xfer_kmem (memaddr, myaddr, len, write, target)
429 struct target_ops *target;
434 if (memaddr >= ksym_maxuseraddr())
438 nu = xfer_umem (memaddr, myaddr, len, write);
444 if (memaddr != ksym_maxuseraddr())
450 ns = (write ? kvm_write : kvm_read) (core_kd, memaddr, myaddr, len);
458 xfer_umem (memaddr, myaddr, len, write)
462 int write; /* ignored */
467 if (cur_proc == NULL || kvread (cur_proc, &proc))
468 error ("cannot read proc at %#x", cur_proc);
469 n = kvm_uread (core_kd, &proc, memaddr, myaddr, len) ;
479 static CORE_ADDR kernbase;
480 struct minimal_symbol *sym;
484 sym = lookup_minimal_symbol ("kernbase", NULL, NULL);
488 kernbase = SYMBOL_VALUE_ADDRESS (sym);
494 #define KERNOFF (ksym_kernbase())
495 #define INKERNEL(x) ((x) >= KERNOFF)
497 static CORE_ADDR sbr;
498 static CORE_ADDR curpcb;
499 static int found_pcb;
502 static struct pcb pcb;
505 set_proc_cmd (char *arg, int from_tty)
508 struct kinfo_proc *kp;
512 error_no_arg ("proc address for new current process");
513 if (!kernel_debugging)
514 error ("not debugging kernel");
516 paddr = (CORE_ADDR)parse_and_eval_address (arg);
517 /* assume it's a proc pointer if it's in the kernel */
518 if (paddr >= kernel_start) {
519 if (set_proc_context(paddr))
520 error("invalid proc address");
522 kp = kvm_getprocs(core_kd, KERN_PROC_PID, paddr, &cnt);
524 error("invalid pid");
525 if (set_proc_context((CORE_ADDR)kp->kp_eproc.e_paddr))
526 error("invalid proc address");
533 CORE_ADDR td_ptr_addr;
535 CORE_ADDR pcb_ptr_addr;
538 td_ptr_addr = prv_start + offsetof(struct mdglobaldata, mi.gd_curthread);
539 td_ptr_addr = kvtophys(cfd, td_ptr_addr);
540 physrd(cfd, td_ptr_addr, (char *)&td_ptr, sizeof(CORE_ADDR));
541 pcb_ptr_addr = td_ptr + offsetof(struct thread, td_pcb);
542 pcb_ptr_addr = kvtophys(cfd, pcb_ptr_addr);
543 physrd(cfd, pcb_ptr_addr, (char *)&pcb_ptr, sizeof(CORE_ADDR));
548 set_cpu_cmd (arg, from_tty)
553 struct kinfo_proc *kp;
557 error_no_arg ("cpu number");
558 if (!kernel_debugging)
559 error ("not debugging kernel");
561 error ("not debugging SMP kernel");
563 cpu = (int)parse_and_eval_address (arg);
564 if (cpu < 0 || cpu > ncpus)
565 error ("cpu number out of range");
569 curpcb = findpcb(cfd);
572 paddr = ksym_lookup ("dumppcb") - KERNOFF;
574 paddr = kvtophys (cfd, curpcb);
575 read_pcb (cfd, paddr);
576 printf ("initial pcb at %lx\n", (unsigned long)paddr);
578 if ((cur_proc = curProc()))
579 target_fetch_registers (-1);
581 /* Now, set up the frame cache, and print the top of stack */
582 flush_cached_frames ();
583 set_current_frame (create_new_frame (read_fp (), read_pc ()));
584 select_frame (get_current_frame (), 0);
585 print_stack_frame (selected_frame, selected_frame_level, 1);
588 /* substitutes for the stuff in libkvm which doesn't work */
589 /* most of this was taken from the old kgdb */
591 /* we don't need all this stuff, but the call should look the same */
594 kvm_open (efile, cfile, sfile, perm, errout)
597 char *sfile; /* makes this kvm_open more compatible to the one in libkvm */
599 char *errout; /* makes this kvm_open more compatible to the one in libkvm */
605 if ((cfd = open (cfile, perm, 0)) < 0)
609 if ((stb.st_mode & S_IFMT) == S_IFCHR
610 && stb.st_rdev == makedev (2, 0))
613 kfd = open (_PATH_KMEM, perm, 0);
617 * Both UP and SMP use CPU_prvspace.
620 physrd(cfd, ksym_lookup("ncpus") - KERNOFF, (char *)&ncpus, sizeof(ncpus));
621 prv_space = ksym_lookup("CPU_prvspace");
622 prv_space_size = (int)ksym_lookup("gd_idlestack_top");
623 printf("%d cpu%s [%08x,%d]\n", ncpus, (ncpus == 1 ? "" : "s"), prv_space, prv_space_size);
626 physrd (cfd, ksym_lookup ("IdlePTD") - KERNOFF, (char*)&sbr, sizeof sbr);
627 printf ("IdlePTD at phsyical address 0x%08lx\n", (unsigned long)sbr);
628 curpcb = findpcb(cfd);
630 found_pcb = 1; /* for vtophys */
632 paddr = ksym_lookup ("dumppcb") - KERNOFF;
634 paddr = kvtophys (cfd, curpcb);
635 read_pcb (cfd, paddr);
636 printf ("initial pcb at physical address 0x%08lx\n", (unsigned long)paddr);
649 kvm_write (core_kd, memaddr, myaddr, len)
661 * Just like kvm_read, only we write.
664 if (lseek (kfd, (off_t)memaddr, 0) < 0
667 error ("kvm_write:invalid address (%x)", memaddr);
670 cc = write (kfd, myaddr, len);
673 error ("kvm_write:write failed");
677 error ("kvm_write:short write");
685 printf ("kvm_write not implemented for dead kernels\n");
692 kvm_read (core_kd, memaddr, myaddr, len)
697 return (kernel_core_file_hook (core_kd, memaddr, myaddr, len));
701 kvm_uread (core_kd, p, memaddr, myaddr, len)
703 register struct proc *p;
709 char procfile[MAXPATHLEN];
715 sprintf (procfile, "/proc/%d/mem", p->p_pid);
716 fd = open (procfile, O_RDONLY, 0);
719 error ("cannot open %s", procfile);
728 if (lseek (fd, (off_t)memaddr, 0) == -1 && errno != 0)
730 error ("invalid address (%x) in %s", memaddr, procfile);
733 amount = read (fd, cp, len);
736 error ("error reading %s", procfile);
741 error ("EOF reading %s", procfile);
750 return ((ssize_t) (cp - myaddr));
753 return (kernel_core_file_hook (core_kd, memaddr, myaddr, len));
756 static struct kinfo_proc kp;
759 * try to do what kvm_proclist in libkvm would do
762 kvm_proclist (cfd, pid, p, cnt)
768 for (; p != NULL; p = lp.p_list.le_next) {
769 if (!kvm_read(cfd, (CORE_ADDR)p, (char *)&lp, sizeof (lp)))
773 kp.kp_eproc.e_paddr = p;
782 * try to do what kvm_deadprocs in libkvm would do
784 static struct kinfo_proc *
785 kvm_deadprocs (cfd, pid, cnt)
788 CORE_ADDR allproc, zombproc;
791 allproc = ksym_lookup("allproc");
792 if (kvm_read(cfd, allproc, (char *)&p, sizeof (p)) == 0)
794 kvm_proclist (cfd, pid, p, cnt);
796 zombproc = ksym_lookup("zombproc");
797 if (kvm_read(cfd, zombproc, (char *)&p, sizeof (p)) == 0)
799 kvm_proclist (cfd, pid, p, cnt);
805 * try to do what kvm_getprocs in libkvm would do
807 static struct kinfo_proc *
808 kvm_getprocs (cfd, op, proc, cnt)
815 /* assume it's a pid */
816 if (devmem) { /* "live" kernel, use sysctl */
819 mib[2] = KERN_PROC_PID;
822 if (sysctl (mib, 4, &kp, &size, NULL, 0) < 0) {
833 return (kvm_deadprocs (cfd, (int)proc, cnt));
837 physrd (cfd, addr, dat, len)
843 if (lseek (cfd, (off_t)addr, L_SET) == -1)
845 return (read (cfd, dat, len));
855 static CORE_ADDR PTD = -1;
856 CORE_ADDR current_ptd;
859 * We may no longer have a linear system page table...
861 * Here's the scoop. IdlePTD contains the physical address
862 * of a page table directory that always maps the kernel.
863 * IdlePTD is in memory that is mapped 1-to-1, so we can
864 * find it easily given its 'virtual' address from ksym_lookup().
865 * For hysterical reasons, the value of IdlePTD is stored in sbr.
867 * To look up a kernel address, we first convert it to a 1st-level
868 * address and look it up in IdlePTD. This gives us the physical
869 * address of a page table page; we extract the 2nd-level part of
870 * VA and read the 2nd-level pte. Finally, we add the offset part
871 * of the VA into the physical address from the pte and return it.
873 * User addresses are a little more complicated. If we don't have
874 * a current PCB from read_pcb(), we use PTD, which is the (fixed)
875 * virtual address of the current ptd. Since it's NOT in 1-to-1
876 * kernel space, we must look it up using IdlePTD. If we do have
877 * a pcb, we get the ptd from pcb_ptd.
882 else if (found_pcb == 0)
885 PTD = kvtophys (fd, ksym_lookup ("PTD"));
889 current_ptd = pcb.pcb_cr3;
892 * Read the first-level page table (ptd).
894 v = current_ptd + ( (unsigned)addr >> PDRSHIFT) * sizeof pte;
895 if (physrd (fd, v, (char *)&pte, sizeof pte) < 0 || (pte&PG_V) == 0)
901 * No second-level page table; ptd describes one 4MB page.
902 * (We assume that the kernel wouldn't set PG_PS without enabling
903 * it cr0, and that the kernel doesn't support 36-bit physical
906 #define PAGE4M_MASK (NBPDR - 1)
907 #define PG_FRAME4M (~PAGE4M_MASK)
908 addr = (pte & PG_FRAME4M) + (addr & PAGE4M_MASK);
913 * Read the second-level page table.
915 v = (pte&PG_FRAME) + ((addr >> PAGE_SHIFT)&(NPTEPG-1)) * sizeof pte;
916 if (physrd (fd, v, (char *) &pte, sizeof (pte)) < 0 || (pte&PG_V) == 0)
919 addr = (pte & PG_FRAME) + (addr & PAGE_MASK);
922 printf ("vtophys (%x) -> %x\n", oldaddr, addr);
928 read_pcb (int fd, CORE_ADDR pcbaddr)
934 /* need this for the `proc' command to work */
935 /* this is a bad hack XXX */
936 if (INKERNEL(pcbaddr))
937 npcbaddr = kvtophys(fd, pcbaddr);
941 if (physrd (fd, (CORE_ADDR)npcbaddr, (char *)&pcb, sizeof pcb) < 0) {
942 error ("cannot read pcb at %x\n", pcbaddr);
945 printf("PCB EIP=%08x ESP=%08x EBP=%08x\n", pcb.pcb_eip, pcb.pcb_esp, pcb.pcb_ebp);
948 * get the register values out of the sys pcb and
949 * store them where `read_register' will find them.
952 * XXX many registers aren't available.
953 * XXX for the non-core case, the registers are stale - they are for
954 * the last context switch to the debugger.
955 * XXX gcc's register numbers aren't all #defined in tm-i386.h.
958 for (i = 0; i < 3; ++i) /* eax,ecx,edx */
959 supply_register (i, (char *)&noreg);
960 supply_register (3, (char *)&pcb.pcb_ebx);
961 supply_register (SP_REGNUM, (char *)&pcb.pcb_esp);
962 supply_register (FP_REGNUM, (char *)&pcb.pcb_ebp);
963 supply_register (6, (char *)&pcb.pcb_esi);
964 supply_register (7, (char *)&pcb.pcb_edi);
965 supply_register (PC_REGNUM, (char *)&pcb.pcb_eip);
966 for (i = 9; i < 14; ++i) /* eflags, cs, ss, ds, es, fs */
967 supply_register (i, (char *)&noreg);
968 supply_register (15, (char *)&pcb.pcb_gs);
970 /* XXX 80387 registers? */
974 * read len bytes from kernel virtual address 'addr' into local
975 * buffer 'buf'. Return numbert of bytes if read ok, 0 otherwise. On read
976 * errors, portion of buffer not read is zeroed.
980 kernel_core_file_hook (fd, addr, buf, len)
995 paddr = kvtophys (fd, addr);
998 memset (buf, '\000', len);
1001 /* we can't read across a page boundary */
1002 i = min (len, PAGE_SIZE - (addr & PAGE_MASK));
1003 if ( (cc = physrd (fd, paddr, cp, i)) <= 0)
1005 memset (cp, '\000', len);
1015 static struct target_ops kcore_ops;
1018 _initialize_kcorelow()
1020 kcore_ops.to_shortname = "kcore";
1021 kcore_ops.to_longname = "Kernel core dump file";
1023 "Use a core file as a target. Specify the filename of the core file.";
1024 kcore_ops.to_open = kcore_open;
1025 kcore_ops.to_close = kcore_close;
1026 kcore_ops.to_attach = find_default_attach;
1027 kcore_ops.to_detach = kcore_detach;
1028 kcore_ops.to_fetch_registers = get_kcore_registers;
1029 kcore_ops.to_xfer_memory = kcore_xfer_kmem;
1030 kcore_ops.to_files_info = kcore_files_info;
1031 kcore_ops.to_create_inferior = find_default_create_inferior;
1032 kcore_ops.to_stratum = kcore_stratum;
1033 kcore_ops.to_has_memory = 1;
1034 kcore_ops.to_has_stack = 1;
1035 kcore_ops.to_has_registers = 1;
1036 kcore_ops.to_magic = OPS_MAGIC;
1038 add_target (&kcore_ops);
1039 add_com ("proc", class_obscure, set_proc_cmd, "Set current process context");
1040 add_com ("cpu", class_obscure, set_cpu_cmd, "Set current cpu");