From ddd40738c8937da58b2c4c219a1f20f3d83e8438 Mon Sep 17 00:00:00 2001
From: tracer-ysyx <tracer@ysyx.org>
Date: Mon, 15 Jan 2024 23:41:20 +0800
Subject: [PATCH] =?UTF-8?q?>=20compile=20NEMU=20ysyx=5F22040000=20?=
 =?UTF-8?q?=E6=9D=8E=E5=BF=83=E6=9D=A8=20Linux=20calcite=206.1.71=20#1-Nix?=
 =?UTF-8?q?OS=20SMP=20PREEMPT=5FDYNAMIC=20Fri=20Jan=20=205=2014:18:41=20UT?=
 =?UTF-8?q?C=202024=20x86=5F64=20GNU/Linux=20=2023:41:20=20=20up=202=20day?=
 =?UTF-8?q?s=2012:36,=20=202=20users,=20=20load=20average:=200.69,=200.55,?=
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---
 nemu/src/monitor/sdb/addrexp.l | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nemu/src/monitor/sdb/addrexp.l b/nemu/src/monitor/sdb/addrexp.l
index 274f3ce..255c4ce 100644
--- a/nemu/src/monitor/sdb/addrexp.l
+++ b/nemu/src/monitor/sdb/addrexp.l
@@ -10,7 +10,7 @@
 
 0[xX][0-9a-fA-F]+ { yylval = strtoul(yytext, NULL, 16); return HEX_NUMBER; }
 [0-9]+            { yylval = strtoul(yytext, NULL, 10); return NUMBER; }
-$[a-zA-Z]{2,3}    {
+${1,2}[a-zA-Z]{2,3}    {
     yylval = isa_reg_str2val(yytext + 1, &success);
     if(!success) {
         yyerror(NULL, "Failed to convert reg to value");