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/*-
* SPDX-License-Identifier: MIT-CMU
*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
*/
/*
* Author: David B. Golub, Carnegie Mellon University
* Date: 7/90
*/
/*
* Miscellaneous printing.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kdb.h>
#include <sys/proc.h>
#include <machine/pcb.h>
#include <ddb/ddb.h>
#include <ddb/db_variables.h>
#include <ddb/db_sym.h>
void
db_show_regs(db_expr_t _1, bool _2, db_expr_t _3, char *modif)
{
struct trapframe *oldtf;
struct db_variable *regp;
db_expr_t value, offset;
const char *name;
/*
* The 'u' modifier instructs us to print the previous trapframe, most
* often containing state from userspace. This is done by temporarily
* switching out kdb_frame.
*
* NB: curthread is used instead of kdb_thread, so that behaviour is
* consistent with regular `show registers`, which always prints
* curthread's trapframe.
*/
oldtf = kdb_frame;
if (modif[0] == 'u') {
if (curthread->td_frame == NULL ||
curthread->td_frame == oldtf) {
db_printf("previous trapframe unavailable");
return;
}
kdb_frame = curthread->td_frame;
}
for (regp = db_regs; regp < db_eregs; regp++) {
if (!db_read_variable(regp, &value))
continue;
db_printf("%-12s%#*lr", regp->name,
(int)(sizeof(unsigned long) * 2 + 2), (unsigned long)value);
db_find_xtrn_sym_and_offset((db_addr_t)value, &name, &offset);
if (name != NULL && offset <= (unsigned long)db_maxoff &&
offset != value) {
db_printf("\t%s", name);
if (offset != 0)
db_printf("+%+#lr", (long)offset);
}
db_printf("\n");
}
db_print_loc_and_inst(PC_REGS());
kdb_frame = oldtf;
}
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