MFC 285783:

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'.

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/ddb/db_print.c b/sys/ddb/db_print.c
index 9e45456..bbcfa2a 100644
--- a/sys/ddb/db_print.c
+++ b/sys/ddb/db_print.c
@@ -56,7 +56,8 @@ db_show_regs(db_expr_t _1, boolean_t _2, db_expr_t _3, char *_4)
 	for (regp = db_regs; regp < db_eregs; regp++) {
 		if (!db_read_variable(regp, &value))
 			continue;
-		db_printf("%-12s%#10lr", regp->name, (unsigned long)value);
+		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) {