arm: async uart writes & fixes

arm/crash.cc

@@ -15,19 +15,19 @@ namespace {
     char addr[] = "00000000: ";
     int i = 0;
     itoa(reinterpret_cast<uint32_t>(begin), addr);
-    UartSendCrash(addr);
+    UartWriteCrash(addr);
     for (uint32_t* ptr = begin; direction > 0 ? ptr < end : ptr > end;
          ptr += direction, i++) {
         itoa(*ptr, number);
-        UartSendCrash(number);
+        UartWriteCrash(number);
         if (i % 4 == 3) {
-            UartSendCrash("\r\n");
+            UartWriteCrash("\r\n");
             itoa(reinterpret_cast<uint32_t>(ptr + 1), addr);
-            UartSendCrash(addr);
+            UartWriteCrash(addr);
         }
     }
     if (i % 4 != 3) {
-        UartSendCrash("\r\n");
+        UartWriteCrash("\r\n");
     }
 }
 
@@ -39,7 +39,7 @@ void StackTrace(uint32_t* sp) {
             continue;
         }
         itoa(*ptr, number);
-        UartSendCrash(number);
+        UartWriteCrash(number);
     }
 }
 
@@ -68,16 +68,16 @@ struct Armv6mRegs {
 void CrashHandler(Armv6mRegs* regs) {
     char number[] = "00000000\r\n";
 
-    UartSendCrash("\r\n\r\nCra$h!!\r\n- xpsr: 0x");
+    UartWriteCrash("\r\n\r\nCra$h!!\r\n- xpsr: 0x");
     itoa(regs->xpsr, number);
-    UartSendCrash(number);
-    UartSendCrash("- pc: 0x");
+    UartWriteCrash(number);
+    UartWriteCrash("- pc: 0x");
     itoa(regs->pc, number);
-    UartSendCrash(number);
-    UartSendCrash("- lr: 0x");
+    UartWriteCrash(number);
+    UartWriteCrash("- lr: 0x");
     itoa(regs->lr, number);
-    UartSendCrash(number);
-    UartSendCrash("- Stack trace:\r\n");
+    UartWriteCrash(number);
+    UartWriteCrash("- Stack trace:\r\n");
     StackTrace(reinterpret_cast<uint32_t*>(regs->sp));
 
     while (1) {
@@ -103,10 +103,13 @@ __attribute__((naked)) void HardFaultHandler() {
         "mrs lr, msp           \n"
         "push {r0-r3, lr}      \n"
         "push {r4-r7}          \n"
+        :
+        : "r"(gpio0));
+    asm volatile(
         "mrs r0, msp           \n"
-        "mov r1, %1            \n"
+        "mov r1, %0            \n"
         "blx r1                \n"
         :
-        : "r"(gpio0), "r"(CrashHandler));
+        : "r"(CrashHandler));
 }
 }  // namespace crash