diff --git a/src/target/armv4_5.c b/src/target/armv4_5.c
index 0d890b80b..334f834a9 100644
--- a/src/target/armv4_5.c
+++ b/src/target/armv4_5.c
@@ -53,13 +53,63 @@ char* armv4_5_core_reg_list[] =
 	"cpsr", "spsr_fiq", "spsr_irq", "spsr_svc", "spsr_abt", "spsr_und"
 };
 
-char * armv4_5_mode_strings_list[] =
+static const char *armv4_5_mode_strings_list[] =
 {
 	"Illegal mode value", "User", "FIQ", "IRQ", "Supervisor", "Abort", "Undefined", "System"
 };
 
 /* Hack! Yuk! allow -1 index, which simplifies codepaths elsewhere in the code */
-char** armv4_5_mode_strings = armv4_5_mode_strings_list + 1;
+const char **armv4_5_mode_strings = armv4_5_mode_strings_list + 1;
+
+/** Map PSR mode bits to linear number */
+int armv4_5_mode_to_number(enum armv4_5_mode mode)
+{
+	switch (mode) {
+	case ARMV4_5_MODE_ANY:
+		/* map MODE_ANY to user mode */
+	case ARMV4_5_MODE_USR:
+		return 0;
+	case ARMV4_5_MODE_FIQ:
+		return 1;
+	case ARMV4_5_MODE_IRQ:
+		return 2;
+	case ARMV4_5_MODE_SVC:
+		return 3;
+	case ARMV4_5_MODE_ABT:
+		return 4;
+	case ARMV4_5_MODE_UND:
+		return 5;
+	case ARMV4_5_MODE_SYS:
+		return 6;
+	default:
+		LOG_ERROR("invalid mode value encountered %d", mode);
+		return -1;
+	}
+}
+
+/** Map linear number to PSR mode bits. */
+enum armv4_5_mode armv4_5_number_to_mode(int number)
+{
+	switch (number) {
+	case 0:
+		return ARMV4_5_MODE_USR;
+	case 1:
+		return ARMV4_5_MODE_FIQ;
+	case 2:
+		return ARMV4_5_MODE_IRQ;
+	case 3:
+		return ARMV4_5_MODE_SVC;
+	case 4:
+		return ARMV4_5_MODE_ABT;
+	case 5:
+		return ARMV4_5_MODE_UND;
+	case 6:
+		return ARMV4_5_MODE_SYS;
+	default:
+		LOG_ERROR("mode index out of bounds %d", number);
+		return ARMV4_5_MODE_ANY;
+	}
+}
 
 char* armv4_5_state_strings[] =
 {
diff --git a/src/target/armv4_5.h b/src/target/armv4_5.h
index ffcd7c029..1e3ee42d0 100644
--- a/src/target/armv4_5.h
+++ b/src/target/armv4_5.h
@@ -41,7 +41,10 @@ typedef enum armv4_5_mode
 	ARMV4_5_MODE_ANY = -1
 } armv4_5_mode_t;
 
-extern char** armv4_5_mode_strings;
+int armv4_5_mode_to_number(enum armv4_5_mode mode);
+enum armv4_5_mode armv4_5_number_to_mode(int number);
+
+extern const char **armv4_5_mode_strings;
 
 typedef enum armv4_5_state
 {
@@ -136,43 +139,6 @@ struct armv4_5_core_reg
 struct reg_cache* armv4_5_build_reg_cache(struct target *target,
 		struct arm *armv4_5_common);
 
-/* map psr mode bits to linear number */
-static __inline int armv4_5_mode_to_number(enum armv4_5_mode mode)
-{
-	switch (mode)
-	{
-		case ARMV4_5_MODE_USR: return 0; break;
-		case ARMV4_5_MODE_FIQ: return 1; break;
-		case ARMV4_5_MODE_IRQ: return 2; break;
-		case ARMV4_5_MODE_SVC: return 3; break;
-		case ARMV4_5_MODE_ABT: return 4; break;
-		case ARMV4_5_MODE_UND: return 5; break;
-		case ARMV4_5_MODE_SYS: return 6; break;
-		case ARMV4_5_MODE_ANY: return 0; break;	/* map MODE_ANY to user mode */
-		default:
-			LOG_ERROR("invalid mode value encountered %d", mode);
-			return -1;
-	}
-}
-
-/* map linear number to mode bits */
-static __inline enum armv4_5_mode armv4_5_number_to_mode(int number)
-{
-	switch (number)
-	{
-		case 0: return ARMV4_5_MODE_USR; break;
-		case 1: return ARMV4_5_MODE_FIQ; break;
-		case 2: return ARMV4_5_MODE_IRQ; break;
-		case 3: return ARMV4_5_MODE_SVC; break;
-		case 4: return ARMV4_5_MODE_ABT; break;
-		case 5: return ARMV4_5_MODE_UND; break;
-		case 6: return ARMV4_5_MODE_SYS; break;
-		default:
-			LOG_ERROR("mode index out of bounds %d", number);
-			return ARMV4_5_MODE_ANY;
-	}
-};
-
 int armv4_5_arch_state(struct target *target);
 int armv4_5_get_gdb_reg_list(struct target *target,
 		struct reg **reg_list[], int *reg_list_size);