Explain that panic() will produce a page fault if there is no console

k-ahci.cc

@@ -175,6 +175,8 @@ void ahcistate::handle_error_interrupt() {
     pr_->serror = ~0U;
     pr_->command |= pcmd_start;
     // XXX must `READ LOG EXT` to clear error
+    // Note that panic() will prouce a page fault if there is no console
+    // (https://github.com/CS161/chickadee/issues/14)
     panic("SATA disk error");
 }
 

k-hardware.cc

@@ -413,6 +413,8 @@ void __cxa_guard_release(long long* arg) {
 // __cxa_pure_virtual()
 //    Used as a placeholder for pure virtual functions.
 void __cxa_pure_virtual() {
+    // Note that panic() will prouce a page fault if there is no console
+    // (https://github.com/CS161/chickadee/issues/14)
     panic("pure virtual function called in kernel!\n");
 }
 

k-proc.cc

@@ -70,6 +70,8 @@ void proc::init_kernel(pid_t pid, void (*f)()) {
 //    Called when `k-exception.S` tries to run a non-runnable proc.
 
 void proc::panic_nonrunnable() {
+    // Note that panic() will prouce a page fault if there is no console
+    // (https://github.com/CS161/chickadee/issues/14)
     panic("Trying to resume proc %d, which is not runnable\n"
           "(proc state %d, last user %%rip %p)",
           id_, pstate_.load(), last_user_rip_);

k-vmiter.cc

@@ -11,6 +11,8 @@ void vmiter::down() {
         pep_ = &pt->entry[pageindex(va_, level_)];
     }
     if ((*pep_ & PTE_PAMASK) >= 0x100000000UL) {
+        // Note that panic() will prouce a page fault if there is no console
+        // (https://github.com/CS161/chickadee/issues/14)
         panic("Page table %p may contain uninitialized memory!\n"
               "(Page table contents: %p)\n", pt_, *pep_);
     }

lib.hh

@@ -474,6 +474,8 @@ assert_memeq_fail(const char* file, int line, const char* msg,
 
 // panic(format, ...)
 //    Prints the message determined by `format` and fails.
+//      Note that panic() will prouce a page fault if there is no console
+//      (https://github.com/CS161/chickadee/issues/14)
 void __attribute__((noinline, noreturn, cold))
 panic(const char* format, ...);
 

p-testkalloc.cc

@@ -5,5 +5,7 @@ void process_main() {
     // Running `testkalloc` should cause the kernel to run buddy allocator
     // tests. How you make this work is up to you.
 
+    // Note that panic() will prouce a page fault if there is no console
+    // (https://github.com/CS161/chickadee/issues/14)
     panic("testkalloc not implemented!\n");
 }

u-lib.cc

@@ -36,6 +36,8 @@ int printf(const char* format, ...) {
 
 // panic, assert_fail
 //     Call the SYSCALL_PANIC system call so the kernel loops until Control-C.
+//      Note that panic() will prouce a page fault if there is no console
+//      (https://github.com/CS161/chickadee/issues/14)
 
 void panic(const char* format, ...) {
     va_list val;