Release Vulpes OS 2.7-preview.22

tundra/probes/armv7-smoke.c

@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: MPL-2.0 */
+/* Linux EABI smoke test: no libc, filesystem writes, or privileged operations. */
+static long syscall3(long number, long a, long b, long c) {
+  register long r0 __asm__("r0") = a;
+  register long r1 __asm__("r1") = b;
+  register long r2 __asm__("r2") = c;
+  register long r7 __asm__("r7") = number;
+  __asm__ volatile("svc 0" : "+r"(r0) : "r"(r1), "r"(r2), "r"(r7) : "memory", "cc");
+  return r0;
+}
+
+static void print(const char *text) {
+  long length = 0;
+  while (text[length]) ++length;
+  while (length > 0) {
+    long count = syscall3(4, 1, (long)text, length);
+    if (count <= 0) return;
+    text += count;
+    length -= count;
+  }
+}
+
+static void number(unsigned long value) {
+  char buffer[16];
+  int end = 15;
+  buffer[end] = 0;
+  do {
+    buffer[--end] = '0' + value % 10;
+    value /= 10;
+  } while (value);
+  print(buffer + end);
+}
+
+__attribute__((noreturn)) void _start(void) {
+  struct { char system[65], node[65], release[65], version[65], machine[65], domain[65]; } uts;
+  long status = syscall3(122, (long)&uts, 0, 0);
+  print("VULPES_ARMV7_PROBE=1\n");
+  print("This is a native diagnostic, not Gecko or a replacement OS.\nuid=");
+  number((unsigned long)syscall3(24, 0, 0, 0));
+  print("\n");
+  if (status == 0) {
+    print("kernel="); print(uts.release);
+    print("\narchitecture="); print(uts.machine); print("\n");
+  }
+  print(status == 0 ? "result=PASS\n" : "result=FAIL\n");
+  syscall3(1, status == 0 ? 0 : 1, 0, 0);
+  for (;;) {}
+}