freebsd-dev/sys/ddb/db_print.c
John Baldwin 9a2d6ab990 Various changes to the registers displayed in DDB for x86.
- Fix segment registers to only display the low 16 bits.
- Remove unused handlers and entries for the debug registers.
- Display xcr0 (if valid) in 'show sysregs'.
- Add '0x' prefix to MSR values to match other values in 'show sysregs'.
- MFamd64: Display various MSRs in 'show sysregs'.
- Add a 'show dbregs' to display the value of debug registers.
- Dynamically size the column width for register values to properly
  align columns on 64-bit platforms.
- Display %gs for i386 in 'show registers'.

Differential Revision:	https://reviews.freebsd.org/D2784
Reviewed by:	kib, markj
MFC after:	2 weeks
2015-07-22 01:09:02 +00:00

72 lines
1.9 KiB
C

/*-
* 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 *_4)
{
struct db_variable *regp;
db_expr_t value, offset;
const char *name;
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());
}