CI: Update exceptions CI for latest Rust and GCC

Author: adamgreig

.github/bors.toml

@@ -1,4 +1,7 @@
 block_labels = ["needs-decision"]
 delete_merged_branches = true
 required_approvals = 1
-status = ["build"]
+status = [
+    "build (stable)",
+    "build (1.51.0)",
+]

ci/exceptions/app/app.objdump

@@ -9,112 +9,125 @@ Disassembly of section .text:
                	trap
 
 <Reset>:
+               	push	{r7, lr}
+               	mov	r7, sp
                	movw	r1, #0x0
                	movw	r0, #0x0
                	movt	r1, #0x2000
                	movt	r0, #0x2000
                	subs	r1, r1, r0
-               	bl	#0xe2
+               	bl	#0x34
                	movw	r1, #0x0
                	movw	r0, #0x0
                	movt	r1, #0x2000
                	movt	r0, #0x2000
                	subs	r2, r1, r0
-               	movw	r1, #0x142
+               	movw	r1, #0x16c
                	movt	r1, #0x0
                	bl	#0x8
-               	bl	#-0x3c
+               	bl	#-0x40
                	trap
 
-DefaultExceptionHandler:
-               	b	#-0x4 <DefaultExceptionHandler>
+<UsageFault>:
+               	b	#-0x4 <UsageFault>
 
-UsageFault:
-               	blo.w	#0x2756a <_sidata+0x274ab>
+<__aeabi_memcpy>:
+               	b.w	#0x10 <memcpy>
 
-__aeabi_memcpy:
+<__aeabi_memset>:
+               	mov	r3, r1
+               	mov	r1, r2
+               	mov	r2, r3
+               	b.w	#0x84 <memset>
+
+<__aeabi_memclr>:
+               	movs	r2, #0x0
+               	b.w	#-0x10 <__aeabi_memset>
+
+<memcpy>:
                	push	{r4, r5, r6, r7, lr}
-               	cbz	r2, #0x60
+               	add	r7, sp, #0xc
+               	str	r8, [sp, #-4]!
+               	cbz	r2, #0x10
                	subs	r3, r2, #0x1
                	and	r12, r2, #0x3
                	cmp	r3, #0x3
-               	bhs	#0x8 <__aeabi_memcpy+0x18>
+               	bhs	#0xc <memcpy+0x22>
                	movs	r2, #0x0
                	cmp.w	r12, #0x0
-               	bne	#0x32 <__aeabi_memcpy+0x4a>
-               	b	#0x4c <__aeabi_memcpy+0x66>
-               	sub.w	lr, r12, r2
-               	adds	r3, r1, #0x1
-               	adds	r4, r0, #0x1
+               	bne	#0x3e <memcpy+0x5c>
+               	ldr	r8, [sp], #4
+               	pop	{r4, r5, r6, r7, pc}
+               	bic	r2, r2, #0x3
+               	add.w	lr, r0, #0x1
+               	rsbs	r4, r2, #0
+               	add.w	r8, r1, #0x1
                	mvn	r2, #0x3
-               	adds	r6, r3, r2
-               	adds	r5, r4, r2
-               	adds	r2, #0x4
-               	ldrb	r7, [r6, #0x3]
-               	strb	r7, [r5, #0x3]
-               	ldrb	r7, [r6, #0x4]
-               	strb	r7, [r5, #0x4]
-               	ldrb	r7, [r6, #0x5]
-               	strb	r7, [r5, #0x5]
-               	ldrb	r6, [r6, #0x6]
-               	strb	r6, [r5, #0x6]
+               	add.w	r6, r8, r2
                	add.w	r5, lr, r2
-               	adds	r5, #0x4
-               	bne	#-0x20 <__aeabi_memcpy+0x24>
+               	adds	r2, #0x4
+               	ldrb	r3, [r6, #0x3]
+               	strb	r3, [r5, #0x3]
+               	ldrb	r3, [r6, #0x4]
+               	strb	r3, [r5, #0x4]
+               	ldrb	r3, [r6, #0x5]
+               	strb	r3, [r5, #0x5]
+               	ldrb	r3, [r6, #0x6]
+               	strb	r3, [r5, #0x6]
+               	adds	r3, r4, r2
+               	adds	r3, #0x4
+               	bne	#-0x22 <memcpy+0x34>
                	adds	r2, #0x4
                	cmp.w	r12, #0x0
-               	beq	#0x1a <__aeabi_memcpy+0x66>
+               	beq	#-0x42 <memcpy+0x1c>
                	ldrb	r3, [r1, r2]
                	cmp.w	r12, #0x1
                	strb	r3, [r0, r2]
-               	beq	#0x10 <__aeabi_memcpy+0x66>
+               	beq	#-0x4c <memcpy+0x1c>
                	adds	r3, r2, #0x1
                	cmp.w	r12, #0x2
-               	ldrb	r7, [r1, r3]
-               	strb	r7, [r0, r3]
-               	beq	#0x4 <__aeabi_memcpy+0x66>
+               	ldrb	r6, [r1, r3]
+               	strb	r6, [r0, r3]
+               	beq	#-0x58 <memcpy+0x1c>
                	adds	r2, #0x2
                	ldrb	r1, [r1, r2]
                	strb	r1, [r0, r2]
+               	ldr	r8, [sp], #4
                	pop	{r4, r5, r6, r7, pc}
 
-__aeabi_memset:
-               	push	{r4, lr}
-               	cmp	r1, #0x0
-               	it	eq
-               	popeq	{r4, pc}
-               	subs	r3, r1, #0x1
-               	and	r12, r1, #0x3
+<memset>:
+               	push	{r4, r6, r7, lr}
+               	add	r7, sp, #0x8
+               	cbz	r2, #0x3e
+               	subs	r3, r2, #0x1
+               	and	r12, r2, #0x3
                	cmp	r3, #0x3
-               	bhs	#0x2 <__aeabi_memset+0x16>
-               	movs	r1, #0x0
-               	b	#0x1e <__aeabi_memset+0x36>
-               	sub.w	lr, r12, r1
-               	adds	r1, r0, #0x1
-               	mvn	r3, #0x3
-               	adds	r4, r1, r3
-               	adds	r3, #0x4
-               	strb	r2, [r4, #0x6]
-               	strb	r2, [r4, #0x5]
-               	strb	r2, [r4, #0x4]
-               	strb	r2, [r4, #0x3]
-               	add.w	r4, lr, r3
+               	bhs	#0x2 <memset+0x14>
+               	movs	r2, #0x0
+               	b	#0x22 <memset+0x38>
+               	bic	r2, r2, #0x3
+               	add.w	lr, r0, #0x1
+               	rsbs	r3, r2, #0
+               	mvn	r2, #0x3
+               	add.w	r4, lr, r2
+               	adds	r2, #0x4
+               	strb	r1, [r4, #0x6]
+               	strb	r1, [r4, #0x5]
+               	strb	r1, [r4, #0x4]
+               	strb	r1, [r4, #0x3]
+               	adds	r4, r3, r2
                	adds	r4, #0x4
-               	bne	#-0x16 <__aeabi_memset+0x20>
-               	adds	r1, r3, #0x4
+               	bne	#-0x16 <memset+0x22>
+               	adds	r2, #0x4
                	cmp.w	r12, #0x0
                	itt	ne
-               	strbne	r2, [r0, r1]
+               	strbne	r1, [r0, r2]
                	cmpne.w	r12, #0x1
-               	bne	#0x0 <__aeabi_memset+0x46>
-               	pop	{r4, pc}
-               	add	r0, r1
+               	bne	#0x0 <memset+0x48>
+               	pop	{r4, r6, r7, pc}
+               	add	r2, r0
                	cmp.w	r12, #0x2
-               	strb	r2, [r0, #0x1]
+               	strb	r1, [r2, #0x1]
                	it	ne
-               	strbne	r2, [r0, #0x2]
-               	pop	{r4, pc}
-
-__aeabi_memclr:
-               	movs	r2, #0x0
-               	b.w	#-0x5a <__aeabi_memset>
+               	strbne	r1, [r2, #0x2]
+               	pop	{r4, r6, r7, pc}

ci/exceptions/app/app.vector_table.objdump

@@ -2,7 +2,7 @@
 app:	file format elf32-littlearm
 
 Contents of section .vector_table:
- 0000 00000120 45000000 7f000000 7f000000  ... E...........
- 0010 7f000000 7f000000 7f000000 00000000  ................
- 0020 00000000 00000000 00000000 7f000000  ................
- 0030 00000000 00000000 7f000000 7f000000  ................
+ 0000 00000120 45000000 83000000 83000000  ... E...........
+ 0010 83000000 83000000 83000000 00000000  ................
+ 0020 00000000 00000000 00000000 83000000  ................
+ 0030 00000000 00000000 83000000 83000000  ................

ci/exceptions/app/src/main.rs

@@ -10,5 +10,5 @@ entry!(main);
 
 fn main() -> ! {
     // this executes the undefined instruction (UDF) and causes a HardFault exception
-    unsafe { intrinsics::abort() }
+    intrinsics::abort()
 }

ci/exceptions/app2/src/main.rs

@@ -9,7 +9,7 @@ use rt::entry;
 entry!(main);
 
 fn main() -> ! {
-    unsafe { intrinsics::abort() }
+    intrinsics::abort()
 }
 
 #[no_mangle]