Interrupt analysis - removed many useless cli/sti

1 files changed, 23 insertions, 1 deletions

diff --git a/src/userspace/programs/init.c b/src/userspace/programs/init.c
index 64da122..306aee6 100644
--- a/src/userspace/programs/init.c
+++ b/src/userspace/programs/init.c
@@ -5,6 +5,20 @@
 #include <syscall.h>
 #include <unistd.h>
 
+u32 cpu_flags()
+{
+	u32 flags;
+	asm volatile("pushf\n"
+		     "pop %0\n"
+		     : "=rm"(flags)::"memory");
+	return flags;
+}
+
+int interrupts_enabled()
+{
+	return (cpu_flags() & 0x200) == 0x200;
+}
+
 void main()
 {
 	if (get_pid() != 1) {
@@ -12,6 +26,11 @@ void main()
 		exit(1);
 	}
 
+	if (interrupts_enabled())
+		printf("INTs enabled :)\n");
+	else
+		printf("INTs disabled :(\n");
+
 	// TODO: Fix page fault when mallocing
 	printf("Initializing userspace...\n");
 
@@ -19,7 +38,10 @@ void main()
 	// TODO: Fix occasional race conditions with cli/sti
 	// TODO: Fix scheduler turning off at some point
 	spawn("/bin/sh");
-	printf("AWESOME");
+	if (interrupts_enabled())
+		printf("INTs enabled :)\n");
+	else
+		printf("INTs disabled :(\n");
 
 	while (1) {
 		//printf("B");