target: arm: disassembler: decode v6T2 ARM DSB instruction

Change-Id: Id91b1a87d34982c72f2a8ab46564c961d1fef9dc
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/3894
Tested-by: jenkins

diff --git a/src/target/arm_disassembler.c b/src/target/arm_disassembler.c
index f0266d023158172bf97a3fd480b221e3bd134ed9..1536679367984fa65c8ae012888f47f89c41d070 100644 (file)
--- a/src/target/arm_disassembler.c
+++ b/src/target/arm_disassembler.c
@@ -129,6 +129,47 @@ static int evaluate_pld(uint32_t opcode,
 
                return ERROR_OK;
        }
+       /* DSB */
+       if ((opcode & 0x07f000f0) == 0x05700040) {
+               instruction->type = ARM_DSB;
+
+               char *opt;
+               switch (opcode & 0x0000000f) {
+               case 0xf:
+                       opt = "SY";
+                       break;
+               case 0xe:
+                       opt = "ST";
+                       break;
+               case 0xb:
+                       opt = "ISH";
+                       break;
+               case 0xa:
+                       opt = "ISHST";
+                       break;
+               case 0x7:
+                       opt = "NSH";
+                       break;
+               case 0x6:
+                       opt = "NSHST";
+                       break;
+               case 0x3:
+                       opt = "OSH";
+                       break;
+               case 0x2:
+                       opt = "OSHST";
+                       break;
+               default:
+                       opt = "UNK";
+               }
+
+               snprintf(instruction->text,
+                               128,
+                               "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tDSB %s",
+                               address, opcode, opt);
+
+               return ERROR_OK;
+       }
        return evaluate_unknown(opcode, address, instruction);
 }
 

diff --git a/src/target/arm_disassembler.h b/src/target/arm_disassembler.h
index 6f8f65d448d2d1d0c6ff781337cf846fe2a17e40..b73f24a8914cc23b87e6243358fe3b2945df0928 100644 (file)
--- a/src/target/arm_disassembler.h
+++ b/src/target/arm_disassembler.h
@@ -106,6 +106,7 @@ enum arm_instruction_type {
        ARM_MCRR,
        ARM_MRRC,
        ARM_PLD,
+       ARM_DSB,
        ARM_QADD,
        ARM_QDADD,
        ARM_QSUB,