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 1.4 2003/08/27 03:21:48 dillon Exp $ */
23 #define _KERNEL_STRUCTURES
31 #include <sys/sysctl.h>
32 #include <sys/param.h>
36 #include <sys/globaldata.h>
37 #include "frame.h" /* required by inferior.h */
49 #include <vm/vm_param.h>
51 #include <machine/vmparam.h>
52 #include <machine/pcb.h>
53 #include <machine/tss.h>
54 #include <machine/frame.h>
55 #include <machine/globaldata.h>
57 static void kcore_files_info PARAMS ((struct target_ops *));
59 static void kcore_close PARAMS ((int));
61 static void get_kcore_registers PARAMS ((int));
63 static int kcore_xfer_kmem PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
65 static int xfer_umem PARAMS ((CORE_ADDR, char *, int, int));
67 static CORE_ADDR ksym_lookup PARAMS ((const char *));
69 static int read_pcb PARAMS ((int, CORE_ADDR));
71 static struct proc * curProc PARAMS ((void));
73 static int set_proc_context PARAMS ((CORE_ADDR paddr));
75 static void kcore_open PARAMS ((char *filename, int from_tty));
77 static void kcore_detach PARAMS ((char *args, int from_tty));
79 static void set_proc_cmd PARAMS ((char *arg, int from_tty));
81 static void set_cpu_cmd PARAMS ((char *arg, int from_tty));
83 static CORE_ADDR kvtophys PARAMS ((int, CORE_ADDR));
85 static int physrd PARAMS ((int, u_int, char*, int));
87 static int kvm_open PARAMS ((const char *efile, char *cfile, char *sfile,
88 int perm, char *errout));
90 static int kvm_close PARAMS ((int fd));
92 static int kvm_write PARAMS ((int core_kd, CORE_ADDR memaddr,
93 char *myaddr, int len));
95 static int kvm_read PARAMS ((int core_kd, CORE_ADDR memaddr,
96 char *myaddr, int len));
98 static int kvm_uread PARAMS ((int core_kd, struct proc *p,
99 CORE_ADDR memaddr, char *myaddr,
102 static int kernel_core_file_hook PARAMS ((int fd, CORE_ADDR addr,
103 char *buf, int len));
105 static struct kinfo_proc * kvm_getprocs PARAMS ((int cfd, int op,
106 CORE_ADDR proc, int *cnt));
108 extern struct target_ops kcore_ops; /* Forward decl */
110 /* Non-zero means we are debugging a kernel core file */
111 int kernel_debugging = 0;
112 int kernel_writablecore = 0;
114 static char *core_file;
115 static int core_kd = -1;
116 static struct proc *cur_proc;
117 static CORE_ADDR kernel_start;
121 static CORE_ADDR prv_space; /* per-cpu private space */
122 static int prv_space_size;
123 #define prv_start (prv_space + cpuid * prv_space_size)
126 * Read the "thing" at kernel address 'addr' into the space pointed to
127 * by point. The length of the "thing" is determined by the type of p.
128 * Result is non-zero if transfer fails.
130 #define kvread(addr, p) \
131 (target_read_memory ((CORE_ADDR)(addr), (char *)(p), sizeof(*(p))))
136 * The following is FreeBSD-specific hackery to decode special frames
137 * and elide the assembly-language stub. This could be made faster by
138 * defining a frame_type field in the machine-dependent frame information,
139 * but we don't think that's too important right now.
141 enum frametype { tf_normal, tf_trap, tf_interrupt, tf_syscall };
144 fbsd_kern_frame_saved_pc (fr)
145 struct frame_info *fr;
147 struct minimal_symbol *sym;
148 CORE_ADDR this_saved_pc;
149 enum frametype frametype;
151 this_saved_pc = read_memory_integer (fr->frame + 4, 4);
152 sym = lookup_minimal_symbol_by_pc (this_saved_pc);
153 frametype = tf_normal;
155 if (strcmp (SYMBOL_NAME(sym), "calltrap") == 0)
157 else if (strncmp (SYMBOL_NAME(sym), "Xresume", 7) == 0)
158 frametype = tf_interrupt;
159 else if (strcmp (SYMBOL_NAME(sym), "Xsyscall") == 0)
160 frametype = tf_syscall;
165 return (this_saved_pc);
167 #define oEIP offsetof(struct trapframe, tf_eip)
170 return (read_memory_integer (fr->frame + 8 + oEIP, 4));
173 return (read_memory_integer (fr->frame + 16 + oEIP, 4));
176 return (read_memory_integer (fr->frame + 8 + oEIP, 4));
185 struct minimal_symbol *sym;
187 sym = lookup_minimal_symbol (name, NULL, NULL);
189 error ("kernel symbol `%s' not found.", name);
191 return SYMBOL_VALUE_ADDRESS (sym);
197 CORE_ADDR td_ptr_addr;
199 CORE_ADDR p_ptr_addr;
202 td_ptr_addr = prv_start + offsetof(struct mdglobaldata, mi.gd_curthread);
203 if (kvread(td_ptr_addr, &td_ptr) != 0)
204 error ("cannot read thread pointer at %08x\n", td_ptr_addr);
205 p_ptr_addr = td_ptr + offsetof(struct thread, td_proc);
206 if (kvread(p_ptr_addr, &p_ptr) != 0)
207 error ("cannot read proc pointer at %08x\n", p_ptr_addr);
208 return((void *)p_ptr);
212 * Set the process context to that of the proc structure at
213 * system address paddr.
216 set_proc_context (paddr)
221 if (paddr < kernel_start)
224 cur_proc = (struct proc *)paddr;
226 set_kernel_boundaries (cur_proc);
229 /* Fetch all registers from core file */
230 target_fetch_registers (-1);
232 /* Now, set up the frame cache, and print the top of stack */
233 flush_cached_frames ();
234 set_current_frame (create_new_frame (read_fp (), read_pc ()));
235 select_frame (get_current_frame (), 0);
239 /* Discard all vestiges of any previous core file
240 and mark data and stack spaces as empty. */
244 kcore_close (quitting)
247 inferior_pid = 0; /* Avoid confusion from thread stuff */
258 /* This routine opens and sets up the core file bfd */
261 kcore_open (filename, from_tty)
266 struct cleanup *old_chain;
272 target_preopen (from_tty);
274 unpush_target (&kcore_ops);
279 error ( (core_kd >= 0)?
280 "No core file specified. (Use `detach' to stop debugging a core file.)"
281 : "No core file specified.");
284 filename = tilde_expand (filename);
285 if (filename[0] != '/')
287 cp = concat (current_directory, "/", filename, NULL);
292 old_chain = make_cleanup (free, filename);
295 * gdb doesn't really do anything if the exec-file couldn't
296 * be opened (in that case exec_bfd is NULL). Usually that's
297 * no big deal, but kvm_open needs the exec-file's name,
298 * which results in dereferencing a NULL pointer, a real NO-NO !
299 * So, check here if the open of the exec-file succeeded.
301 if (exec_bfd == NULL) /* the open failed */
302 error ("kgdb could not open the exec-file, please check the name you used !");
304 core_kd = kvm_open (exec_bfd->filename, filename, NULL,
305 kernel_writablecore? O_RDWR : O_RDONLY, "kgdb: ");
307 perror_with_name (filename);
309 /* Looks semi-reasonable. Toss the old core file and work on the new. */
311 discard_cleanups (old_chain); /* Don't free filename any more */
312 core_file = filename;
313 ontop = !push_target (&kcore_ops);
315 kernel_start = bfd_get_start_address (exec_bfd); /* XXX */
317 /* print out the panic string if there is one */
318 if (kvread (ksym_lookup ("panicstr"), &addr) == 0
320 && target_read_memory (addr, buf, sizeof (buf)) == 0)
322 for (cp = buf; cp < &buf[sizeof (buf)] && *cp; cp++)
323 if (!isascii (*cp) || (!isprint (*cp) && !isspace (*cp)))
327 printf ("panicstr: %s\n", buf);
330 /* Print all the panic messages if possible. */
331 if (symfile_objfile != NULL)
333 printf ("panic messages:\n---\n");
334 snprintf (buf, sizeof buf,
335 "/sbin/dmesg -N %s -M %s | \
336 /usr/bin/awk '/^(panic:|Fatal trap) / { printing = 1 } \
337 { if (printing) print $0 }'",
338 symfile_objfile->name, filename);
346 warning ("you won't be able to access this core file until you terminate\n\
347 your %s; do ``info files''", target_longname);
351 /* we may need this later */
352 cur_proc = (struct proc *)curProc ();
353 /* Now, set up the frame cache, and print the top of stack */
354 flush_cached_frames ();
355 set_current_frame (create_new_frame (read_fp (), read_pc ()));
356 select_frame (get_current_frame (), 0);
357 print_stack_frame (selected_frame, selected_frame_level, 1);
361 kcore_detach (args, from_tty)
366 error ("Too many arguments");
367 unpush_target (&kcore_ops);
368 reinit_frame_cache ();
370 printf_filtered ("No kernel core file now.\n");
373 /* Get the registers out of a core file. This is the machine-
374 independent part. Fetch_core_registers is the machine-dependent
375 part, typically implemented in the xm-file for each architecture. */
377 /* We just get all the registers, so we don't use regno. */
380 #define PCB_ADDR(uptr) ((char *)uptr + UPAGES * PAGE_SIZE - sizeof(struct pcb))
383 get_kcore_registers (int regno)
389 /* find the pcb for the current process */
390 if (cur_proc == NULL)
391 error ("cur_proc is NULL");
392 if (kvread(&cur_proc->p_thread, &td))
393 error ("cannot read cur_proc->p_thread at %p", cur_proc);
394 if (kvread(&td->td_pcb, &pcb))
395 error ("cannot read cur_proc->p_thread->td_pcb at %p", td);
396 if (read_pcb(core_kd, (CORE_ADDR)pcb) < 0)
397 error ("cannot read pcb at %p", pcb);
402 struct target_ops *t;
404 printf ("\t`%s'\n", core_file);
410 static CORE_ADDR maxuseraddr;
411 struct minimal_symbol *sym;
413 if (maxuseraddr == 0)
415 sym = lookup_minimal_symbol ("PTmap", NULL, NULL);
417 maxuseraddr = VM_MAXUSER_ADDRESS;
419 maxuseraddr = SYMBOL_VALUE_ADDRESS (sym);
426 kcore_xfer_kmem (memaddr, myaddr, len, write, target)
431 struct target_ops *target;
436 if (memaddr >= ksym_maxuseraddr())
440 nu = xfer_umem (memaddr, myaddr, len, write);
446 if (memaddr != ksym_maxuseraddr())
452 ns = (write ? kvm_write : kvm_read) (core_kd, memaddr, myaddr, len);
460 xfer_umem (memaddr, myaddr, len, write)
464 int write; /* ignored */
469 if (cur_proc == NULL || kvread (cur_proc, &proc))
470 error ("cannot read proc at %#x", cur_proc);
471 n = kvm_uread (core_kd, &proc, memaddr, myaddr, len) ;
481 static CORE_ADDR kernbase;
482 struct minimal_symbol *sym;
486 sym = lookup_minimal_symbol ("kernbase", NULL, NULL);
490 kernbase = SYMBOL_VALUE_ADDRESS (sym);
496 #define KERNOFF (ksym_kernbase())
497 #define INKERNEL(x) ((x) >= KERNOFF)
499 static CORE_ADDR sbr;
500 static CORE_ADDR curpcb;
501 static int found_pcb;
504 static struct pcb pcb;
507 set_proc_cmd (char *arg, int from_tty)
510 struct kinfo_proc *kp;
514 error_no_arg ("proc address for new current process");
515 if (!kernel_debugging)
516 error ("not debugging kernel");
518 paddr = (CORE_ADDR)parse_and_eval_address (arg);
519 /* assume it's a proc pointer if it's in the kernel */
520 if (paddr >= kernel_start) {
521 if (set_proc_context(paddr))
522 error("invalid proc address");
524 kp = kvm_getprocs(core_kd, KERN_PROC_PID, paddr, &cnt);
526 error("invalid pid");
527 if (set_proc_context((CORE_ADDR)kp->kp_eproc.e_paddr))
528 error("invalid proc address");
535 CORE_ADDR td_ptr_addr;
537 CORE_ADDR pcb_ptr_addr;
540 td_ptr_addr = prv_start + offsetof(struct mdglobaldata, mi.gd_curthread);
541 td_ptr_addr = kvtophys(cfd, td_ptr_addr);
542 physrd(cfd, td_ptr_addr, (char *)&td_ptr, sizeof(CORE_ADDR));
543 pcb_ptr_addr = td_ptr + offsetof(struct thread, td_pcb);
544 pcb_ptr_addr = kvtophys(cfd, pcb_ptr_addr);
545 physrd(cfd, pcb_ptr_addr, (char *)&pcb_ptr, sizeof(CORE_ADDR));
550 set_cpu_cmd (arg, from_tty)
555 struct kinfo_proc *kp;
559 error_no_arg ("cpu number");
560 if (!kernel_debugging)
561 error ("not debugging kernel");
563 error ("not debugging SMP kernel");
565 cpu = (int)parse_and_eval_address (arg);
566 if (cpu < 0 || cpu > ncpus)
567 error ("cpu number out of range");
571 curpcb = findpcb(cfd);
574 paddr = ksym_lookup ("dumppcb") - KERNOFF;
576 paddr = kvtophys (cfd, curpcb);
577 read_pcb (cfd, paddr);
578 printf ("initial pcb at %lx\n", (unsigned long)paddr);
580 if ((cur_proc = curProc()))
581 target_fetch_registers (-1);
583 /* Now, set up the frame cache, and print the top of stack */
584 flush_cached_frames ();
585 set_current_frame (create_new_frame (read_fp (), read_pc ()));
586 select_frame (get_current_frame (), 0);
587 print_stack_frame (selected_frame, selected_frame_level, 1);
590 /* substitutes for the stuff in libkvm which doesn't work */
591 /* most of this was taken from the old kgdb */
593 /* we don't need all this stuff, but the call should look the same */
596 kvm_open (efile, cfile, sfile, perm, errout)
599 char *sfile; /* makes this kvm_open more compatible to the one in libkvm */
601 char *errout; /* makes this kvm_open more compatible to the one in libkvm */
607 if ((cfd = open (cfile, perm, 0)) < 0)
611 if ((stb.st_mode & S_IFMT) == S_IFCHR
612 && stb.st_rdev == makedev (2, 0))
615 kfd = open (_PATH_KMEM, perm, 0);
619 * Both UP and SMP use CPU_prvspace.
622 physrd(cfd, ksym_lookup("ncpus") - KERNOFF, (char *)&ncpus, sizeof(ncpus));
623 prv_space = ksym_lookup("CPU_prvspace");
624 prv_space_size = (int)ksym_lookup("gd_idlestack_top");
625 printf("%d cpu%s [%08x,%d]\n", ncpus, (ncpus == 1 ? "" : "s"), prv_space, prv_space_size);
628 physrd (cfd, ksym_lookup ("IdlePTD") - KERNOFF, (char*)&sbr, sizeof sbr);
629 printf ("IdlePTD at phsyical address 0x%08lx\n", (unsigned long)sbr);
630 curpcb = findpcb(cfd);
632 found_pcb = 1; /* for vtophys */
634 paddr = ksym_lookup ("dumppcb") - KERNOFF;
636 paddr = kvtophys (cfd, curpcb);
637 read_pcb (cfd, paddr);
638 printf ("initial pcb at physical address 0x%08lx\n", (unsigned long)paddr);
651 kvm_write (core_kd, memaddr, myaddr, len)
663 * Just like kvm_read, only we write.
666 if (lseek (kfd, (off_t)memaddr, 0) < 0
669 error ("kvm_write:invalid address (%x)", memaddr);
672 cc = write (kfd, myaddr, len);
675 error ("kvm_write:write failed");
679 error ("kvm_write:short write");
687 printf ("kvm_write not implemented for dead kernels\n");
694 kvm_read (core_kd, memaddr, myaddr, len)
699 return (kernel_core_file_hook (core_kd, memaddr, myaddr, len));
703 kvm_uread (core_kd, p, memaddr, myaddr, len)
705 register struct proc *p;
711 char procfile[MAXPATHLEN];
717 sprintf (procfile, "/proc/%d/mem", p->p_pid);
718 fd = open (procfile, O_RDONLY, 0);
721 error ("cannot open %s", procfile);
730 if (lseek (fd, (off_t)memaddr, 0) == -1 && errno != 0)
732 error ("invalid address (%x) in %s", memaddr, procfile);
735 amount = read (fd, cp, len);
738 error ("error reading %s", procfile);
743 error ("EOF reading %s", procfile);
752 return ((ssize_t) (cp - myaddr));
755 return (kernel_core_file_hook (core_kd, memaddr, myaddr, len));
758 static struct kinfo_proc kp;
761 * try to do what kvm_proclist in libkvm would do
764 kvm_proclist (cfd, pid, p, cnt)
770 for (; p != NULL; p = lp.p_list.le_next) {
771 if (!kvm_read(cfd, (CORE_ADDR)p, (char *)&lp, sizeof (lp)))
775 kp.kp_eproc.e_paddr = p;
784 * try to do what kvm_deadprocs in libkvm would do
786 static struct kinfo_proc *
787 kvm_deadprocs (cfd, pid, cnt)
790 CORE_ADDR allproc, zombproc;
793 allproc = ksym_lookup("allproc");
794 if (kvm_read(cfd, allproc, (char *)&p, sizeof (p)) == 0)
796 kvm_proclist (cfd, pid, p, cnt);
798 zombproc = ksym_lookup("zombproc");
799 if (kvm_read(cfd, zombproc, (char *)&p, sizeof (p)) == 0)
801 kvm_proclist (cfd, pid, p, cnt);
807 * try to do what kvm_getprocs in libkvm would do
809 static struct kinfo_proc *
810 kvm_getprocs (cfd, op, proc, cnt)
817 /* assume it's a pid */
818 if (devmem) { /* "live" kernel, use sysctl */
821 mib[2] = KERN_PROC_PID;
824 if (sysctl (mib, 4, &kp, &size, NULL, 0) < 0) {
835 return (kvm_deadprocs (cfd, (int)proc, cnt));
839 physrd (cfd, addr, dat, len)
845 if (lseek (cfd, (off_t)addr, L_SET) == -1)
847 return (read (cfd, dat, len));
857 static CORE_ADDR PTD = -1;
858 CORE_ADDR current_ptd;
861 * We may no longer have a linear system page table...
863 * Here's the scoop. IdlePTD contains the physical address
864 * of a page table directory that always maps the kernel.
865 * IdlePTD is in memory that is mapped 1-to-1, so we can
866 * find it easily given its 'virtual' address from ksym_lookup().
867 * For hysterical reasons, the value of IdlePTD is stored in sbr.
869 * To look up a kernel address, we first convert it to a 1st-level
870 * address and look it up in IdlePTD. This gives us the physical
871 * address of a page table page; we extract the 2nd-level part of
872 * VA and read the 2nd-level pte. Finally, we add the offset part
873 * of the VA into the physical address from the pte and return it.
875 * User addresses are a little more complicated. If we don't have
876 * a current PCB from read_pcb(), we use PTD, which is the (fixed)
877 * virtual address of the current ptd. Since it's NOT in 1-to-1
878 * kernel space, we must look it up using IdlePTD. If we do have
879 * a pcb, we get the ptd from pcb_ptd.
884 else if (found_pcb == 0)
887 PTD = kvtophys (fd, ksym_lookup ("PTD"));
891 current_ptd = pcb.pcb_cr3;
894 * Read the first-level page table (ptd).
896 v = current_ptd + ( (unsigned)addr >> PDRSHIFT) * sizeof pte;
897 if (physrd (fd, v, (char *)&pte, sizeof pte) < 0 || (pte&PG_V) == 0)
903 * No second-level page table; ptd describes one 4MB page.
904 * (We assume that the kernel wouldn't set PG_PS without enabling
905 * it cr0, and that the kernel doesn't support 36-bit physical
908 #define PAGE4M_MASK (NBPDR - 1)
909 #define PG_FRAME4M (~PAGE4M_MASK)
910 addr = (pte & PG_FRAME4M) + (addr & PAGE4M_MASK);
915 * Read the second-level page table.
917 v = (pte&PG_FRAME) + ((addr >> PAGE_SHIFT)&(NPTEPG-1)) * sizeof pte;
918 if (physrd (fd, v, (char *) &pte, sizeof (pte)) < 0 || (pte&PG_V) == 0)
921 addr = (pte & PG_FRAME) + (addr & PAGE_MASK);
924 printf ("vtophys (%x) -> %x\n", oldaddr, addr);
930 read_pcb (int fd, CORE_ADDR pcbaddr)
936 /* need this for the `proc' command to work */
937 /* this is a bad hack XXX */
938 if (INKERNEL(pcbaddr))
939 npcbaddr = kvtophys(fd, pcbaddr);
943 if (physrd (fd, (CORE_ADDR)npcbaddr, (char *)&pcb, sizeof pcb) < 0) {
944 error ("cannot read pcb at %x\n", pcbaddr);
947 printf("PCB EIP=%08x ESP=%08x EBP=%08x\n", pcb.pcb_eip, pcb.pcb_esp, pcb.pcb_ebp);
950 * get the register values out of the sys pcb and
951 * store them where `read_register' will find them.
954 * XXX many registers aren't available.
955 * XXX for the non-core case, the registers are stale - they are for
956 * the last context switch to the debugger.
957 * XXX gcc's register numbers aren't all #defined in tm-i386.h.
960 for (i = 0; i < 3; ++i) /* eax,ecx,edx */
961 supply_register (i, (char *)&noreg);
962 supply_register (3, (char *)&pcb.pcb_ebx);
963 supply_register (SP_REGNUM, (char *)&pcb.pcb_esp);
964 supply_register (FP_REGNUM, (char *)&pcb.pcb_ebp);
965 supply_register (6, (char *)&pcb.pcb_esi);
966 supply_register (7, (char *)&pcb.pcb_edi);
967 supply_register (PC_REGNUM, (char *)&pcb.pcb_eip);
968 for (i = 9; i < 14; ++i) /* eflags, cs, ss, ds, es, fs */
969 supply_register (i, (char *)&noreg);
970 supply_register (15, (char *)&pcb.pcb_gs);
972 /* XXX 80387 registers? */
976 * read len bytes from kernel virtual address 'addr' into local
977 * buffer 'buf'. Return numbert of bytes if read ok, 0 otherwise. On read
978 * errors, portion of buffer not read is zeroed.
982 kernel_core_file_hook (fd, addr, buf, len)
997 paddr = kvtophys (fd, addr);
1000 memset (buf, '\000', len);
1003 /* we can't read across a page boundary */
1004 i = min (len, PAGE_SIZE - (addr & PAGE_MASK));
1005 if ( (cc = physrd (fd, paddr, cp, i)) <= 0)
1007 memset (cp, '\000', len);
1017 static struct target_ops kcore_ops;
1020 _initialize_kcorelow()
1022 kcore_ops.to_shortname = "kcore";
1023 kcore_ops.to_longname = "Kernel core dump file";
1025 "Use a core file as a target. Specify the filename of the core file.";
1026 kcore_ops.to_open = kcore_open;
1027 kcore_ops.to_close = kcore_close;
1028 kcore_ops.to_attach = find_default_attach;
1029 kcore_ops.to_detach = kcore_detach;
1030 kcore_ops.to_fetch_registers = get_kcore_registers;
1031 kcore_ops.to_xfer_memory = kcore_xfer_kmem;
1032 kcore_ops.to_files_info = kcore_files_info;
1033 kcore_ops.to_create_inferior = find_default_create_inferior;
1034 kcore_ops.to_stratum = kcore_stratum;
1035 kcore_ops.to_has_memory = 1;
1036 kcore_ops.to_has_stack = 1;
1037 kcore_ops.to_has_registers = 1;
1038 kcore_ops.to_magic = OPS_MAGIC;
1040 add_target (&kcore_ops);
1041 add_com ("proc", class_obscure, set_proc_cmd, "Set current process context");
1042 add_com ("cpu", class_obscure, set_cpu_cmd, "Set current cpu");