baremetal: all examples working, all failures accounted for!

SIMD&FP is now enabled in arm from bootloader.

userland/arch/aarch64/c/multiline.cpp

@@ -3,7 +3,7 @@
 #include <assert.h>
 #include <inttypes.h>
 
-int main(void) {
+int main() {
     uint64_t io = 0;
     __asm__ (
         R"(

userland/arch/arm/ldmia.S

@@ -6,6 +6,7 @@
 #define ELEM_SIZE 4
 
 .data;
+.align 4
 my_array_0:
     .word 0x11111111, 0x22222222, 0x33333333, 0x44444444
 my_array_1:

userland/arch/arm/vadd_scalar.S

@@ -22,6 +22,7 @@ LKMC_PROLOGUE
 
     /* Now the same from memory with vldr and vstr. */
 .data
+.align 4
 my_float_0:
     .float 1.5
 my_float_1:

userland/c/empty.c

@@ -0,0 +1 @@
+int main(void) {}

userland/c/false.c

@@ -9,7 +9,7 @@
 
 int main(int argc, char **argv) {
     int ret;
-    if (argc == 1) {
+    if (argc <= 1) {
         ret = 1;
     } else {
         ret = strtoull(argv[1], NULL, 0);

userland/cpp/empty.cpp

@@ -0,0 +1,4 @@
+// Sanity checking low level stuff, initially inspired by baremetal.
+// https://github.com/cirosantilli/linux-kernel-module-cheat#baremetal-cpp
+
+int main() {}