2 * SPDX-License-Identifier: MIT-CMU
4 * Mach Operating System
5 * Copyright (c) 1991,1990 Carnegie Mellon University
8 * Permission to use, copy, modify and distribute this software and its
9 * documentation is hereby granted, provided that both the copyright
10 * notice and this permission notice appear in all copies of the
11 * software, derivative works or modified versions, and any portions
12 * thereof, and that both notices appear in supporting documentation.
14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 * Carnegie Mellon requests users of this software to return to
20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
21 * School of Computer Science
22 * Carnegie Mellon University
23 * Pittsburgh PA 15213-3890
25 * any improvements or extensions that they make and grant Carnegie the
26 * rights to redistribute these changes.
30 * Author: David B. Golub, Carnegie Mellon University
35 * Miscellaneous printing.
38 #include <sys/param.h>
42 #include <machine/pcb.h>
45 #include <ddb/db_variables.h>
46 #include <ddb/db_sym.h>
49 db_show_regs(db_expr_t _1, bool _2, db_expr_t _3, char *modif)
51 struct trapframe *oldtf;
52 struct db_variable *regp;
53 db_expr_t value, offset;
57 * The 'u' modifier instructs us to print the previous trapframe, most
58 * often containing state from userspace. This is done by temporarily
59 * switching out kdb_frame.
61 * NB: curthread is used instead of kdb_thread, so that behaviour is
62 * consistent with regular `show registers`, which always prints
63 * curthread's trapframe.
66 if (modif[0] == 'u') {
67 if (curthread->td_frame == NULL ||
68 curthread->td_frame == oldtf) {
69 db_printf("previous trapframe unavailable");
72 kdb_frame = curthread->td_frame;
75 for (regp = db_regs; regp < db_eregs; regp++) {
76 if (!db_read_variable(regp, &value))
78 db_printf("%-12s%#*lr", regp->name,
79 (int)(sizeof(unsigned long) * 2 + 2), (unsigned long)value);
80 db_find_xtrn_sym_and_offset((db_addr_t)value, &name, &offset);
81 if (name != NULL && offset <= (unsigned long)db_maxoff &&
83 db_printf("\t%s", name);
85 db_printf("+%+#lr", (long)offset);
89 db_print_loc_and_inst(PC_REGS());