Fix gdb regs reference for Cortex-M

Author: elicn

qiling/debugger/gdb/xml/arm/arm-m-profile.xml renamed to qiling/debugger/gdb/xml/cortex_m/arm-m-profile.xml

@@ -25,4 +25,10 @@
   <reg name="pc" bitsize="32" type="code_ptr"/>
 
   <reg name="xpsr" bitsize="32" regnum="25"/>
-</feature>
+  <reg name="msp" bitsize="32"/>
+  <reg name="psp" bitsize="32"/>
+  <reg name="primask" bitsize="32"/>
+  <reg name="basepri" bitsize="32"/>
+  <reg name="faultmask" bitsize="32"/>
+  <reg name="control" bitsize="32"/>
+</feature>

qiling/debugger/gdb/xml/cortex_m/target.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2009-2016 Free Software Foundation, Inc.
+
+ *!Copying and distribution of this file, with or without modification,
+ *!are permitted in any medium without royalty provided the copyright
+ *!notice and this notice are preserved.  -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<target xmlns:xi="http://www.w3.org/2001/XInclude">
+    <architecture>armv7-m</architecture>
+    <xi:include href="arm-m-profile.xml"/>
+</target>

qiling/debugger/gdb/xmlregs.py

@@ -13,14 +13,21 @@
     reg_map_q as arm_regs_q,
     reg_map_s as arm_regs_s
 )
+
+from qiling.arch.cortex_m_const import (
+    reg_map as conretx_m_regs
+)
+
 from qiling.arch.arm64_const import (
     reg_map as arm64_regs,
     reg_map_v as arm64_regs_v,
     reg_map_fp as arm64_reg_map_fp
 )
+
 from qiling.arch.mips_const import (
     reg_map as mips_regs_gpr
 )
+
 from qiling.arch.x86_const import (
     reg_map_32 as x86_regs_32,
     reg_map_64 as x86_regs_64,
@@ -133,7 +140,7 @@ def __load_regsmap(archtype: QL_ARCH, xmltree: ElementTree.ElementTree) -> Seque
             QL_ARCH.X86:      dict(**x86_regs_32, **x86_regs_misc, **x86_regs_cr, **x86_regs_st, **x86_regs_xmm),
             QL_ARCH.X8664:    dict(**x86_regs_64, **x86_regs_misc, **x86_regs_cr, **x86_regs_st, **x86_regs_xmm, **x86_regs_ymm),
             QL_ARCH.ARM:      dict(**arm_regs, **arm_regs_vfp, **arm_regs_q, **arm_regs_s),
-            QL_ARCH.CORTEX_M: arm_regs,
+            QL_ARCH.CORTEX_M: dict(**conretx_m_regs),
             QL_ARCH.ARM64:    dict(**arm64_regs, **arm64_regs_v, **arm64_reg_map_fp),
             QL_ARCH.MIPS:     dict(**mips_regs_gpr)
         }[archtype]