fix arm hard float code path broken by 9e5de65076

Makefile

@@ -42,8 +42,7 @@ else
 	CPPFLAGS += -Iarch/common/include
 endif
 
-# ARM hard float support is presently broken.
-FORCE_SOFT_FLOAT := yes
+FORCE_SOFT_FLOAT := no
 
 ifeq ($(FORCE_SOFT_FLOAT),yes)
         CPPFLAGS += -DFORCE_SOFT_FLOAT

arch/arm/swapcontext.S

@@ -16,13 +16,17 @@ ALIAS(swapcontext, libucontext_swapcontext)
 ALIAS(__swapcontext, libucontext_swapcontext)
 
 FUNC(libucontext_swapcontext)
+	/* copy all of the current registers into the ucontext structure */
+	str	r13, [r0,#REG_OFFSET(13)]
+	str	r14, [r0,#REG_OFFSET(15)]
+
 #ifndef FORCE_SOFT_FLOAT
 #ifndef FORCE_HARD_FLOAT
 	/* test for vfp magic number, copy to other ucontext */
 	ldr	r3, [r1, #VFP_MAGIC_OFFSET]
-	ldr	r4, =#0x56465001
+	ldr	r2, =#0x56465001
 	str	r3, [r0, #VFP_MAGIC_OFFSET]
-	cmp	r3, r4
+	cmp	r3, r2
 	bne	1f
 #endif
 	/* if vfp in use, save and restore d8-d15 */
@@ -36,9 +40,6 @@ FUNC(libucontext_swapcontext)
 1:
 #endif
 
- 	/* copy all of the current registers into the ucontext structure */
- 	str	r13, [r0,#REG_OFFSET(13)]
- 	str	r14, [r0,#REG_OFFSET(15)]
 	add	r2, r0, #REG_OFFSET(0)
 	/* copy r0 with value 0 to indicate success (return value 0) */
 	mov r0, #0