Newlib-3.3.0 fix for ARMv6m

newlib-3.3.0-armv6m.diff

diff -ur a/libgloss/arm/crt0.S b/libgloss/arm/crt0.S
--- a/libgloss/arm/crt0.S	2020-01-22 11:05:51.000000000 +0100
+++ b/libgloss/arm/crt0.S	2020-05-01 21:19:59.000000000 +0200
@@ -565,7 +565,7 @@
 
 	/* For Thumb, constants must be after the code since only 
 	   positive offsets are supported for PC relative addresses.  */
-	.align 0
+	.align 2
 .LC0:
 #ifdef ARM_RDI_MONITOR
 	.word	HeapBase
diff -ur a/newlib/libc/machine/arm/setjmp.S b/newlib/libc/machine/arm/setjmp.S
--- a/newlib/libc/machine/arm/setjmp.S	2020-01-22 11:05:51.000000000 +0100
+++ b/newlib/libc/machine/arm/setjmp.S	2020-05-01 21:19:21.000000000 +0200
@@ -74,11 +74,11 @@
 	mov	r5, sp
 	mov	r6, lr
 	stmia	r0!, {r1, r2, r3, r4, r5, r6}
-	sub	r0, r0, #40
+	subs	r0, r0, #40
 	/* Restore callee-saved low regs.  */
 	ldmia	r0!, {r4, r5, r6, r7}
 	/* Return zero.  */
-	mov	r0, #0
+	movs	r0, #0
 	bx lr
 
 .thumb_func
@@ -86,7 +86,7 @@
 	TYPE (longjmp)
 SYM (longjmp):
 	/* Restore High regs.  */
-	add	r0, r0, #16
+	adds	r0, r0, #16
 	ldmia	r0!, {r2, r3, r4, r5, r6}
 	mov	r8, r2
 	mov	r9, r3
@@ -95,12 +95,12 @@
 	mov	sp, r6
 	ldmia	r0!, {r3} /* lr */
 	/* Restore low regs.  */
-	sub	r0, r0, #40
+	subs	r0, r0, #40
 	ldmia	r0!, {r4, r5, r6, r7}
 	/* Return the result argument, or 1 if it is zero.  */
 	mov	r0, r1
 	bne	1f
-	mov	r0, #1
+	movs	r0, #1
 1:
 	bx	r3