From c2d551ff5acc0e236fe7fd8dfb1ce290d9ff4d99 Mon Sep 17 00:00:00 2001
From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Wed, 27 Apr 2005 20:15:00 +0000
Subject: [PATCH] ARM thumb disassembly (Paul Brook)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1416 c046a42c-6fe2-441c-8c8c-71466251a162
---
 arm-dis.c |  5 +++++
 disas.c   | 21 ++++++++++++++++++---
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/arm-dis.c b/arm-dis.c
index a84d91b488..1e027efc70 100644
--- a/arm-dis.c
+++ b/arm-dis.c
@@ -1556,6 +1556,11 @@ print_insn_arm (pc, info)
     }
   
   is_thumb = force_thumb;
+  if (pc & 1)
+    {
+      is_thumb = 1;
+      pc &= ~(bfd_vma) 1;
+    }
   
 #if 0
   if (!is_thumb && info->symbols != NULL)
diff --git a/disas.c b/disas.c
index 8754713a81..ded2c6d72c 100644
--- a/disas.c
+++ b/disas.c
@@ -108,8 +108,20 @@ bfd_vma bfd_getb32 (const bfd_byte *addr)
   return (bfd_vma) v;
 }
 
-/* Disassemble this for me please... (debugging). 'flags' is only used
-   for i386: non zero means 16 bit code */
+#ifdef TARGET_ARM
+static int
+print_insn_thumb1(bfd_vma pc, disassemble_info *info)
+{
+  return print_insn_arm(pc | 1, info);
+}
+#endif
+
+/* Disassemble this for me please... (debugging). 'flags' has teh following
+   values:
+    i386 - nonzero means 16 bit code
+    arm  - nonzero means thumb code 
+    other targets - unused
+ */
 void target_disas(FILE *out, target_ulong code, target_ulong size, int flags)
 {
     target_ulong pc;
@@ -137,7 +149,10 @@ void target_disas(FILE *out, target_ulong code, target_ulong size, int flags)
         disasm_info.mach = bfd_mach_i386_i386;
     print_insn = print_insn_i386;
 #elif defined(TARGET_ARM)
-    print_insn = print_insn_arm;
+    if (flags)
+	print_insn = print_insn_thumb1;
+    else
+	print_insn = print_insn_arm;
 #elif defined(TARGET_SPARC)
     print_insn = print_insn_sparc;
 #elif defined(TARGET_PPC)