From ce98400f8a9ebd4e62e76b9e292b7598d0d66cc0 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Fri, 2 Apr 2021 23:26:28 +0200
Subject: Added kernel section clear/protect after init

This is a huge security improvement as it prevents potential exploits
of using or modifying internal kernel functions or data.
---
 libs/libc/print.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

(limited to 'libs/libc/print.c')

diff --git a/libs/libc/print.c b/libs/libc/print.c
index b77c165..4c38cdc 100644
--- a/libs/libc/print.c
+++ b/libs/libc/print.c
@@ -3,7 +3,6 @@
 #include <arg.h>
 #include <assert.h>
 #include <conv.h>
-#include <cpu.h>
 #include <def.h>
 #include <mem.h>
 #include <str.h>
@@ -145,7 +144,7 @@ int log(const char *format, ...)
 	return len;
 }
 
-int err(int code, const char *format, ...)
+NORETURN void err(int code, const char *format, ...)
 {
 	if (errno != EOK)
 		log("ERRNO: %d (%s)\n", errno, strerror(errno));
@@ -154,7 +153,6 @@ int err(int code, const char *format, ...)
 	vfprintf(PATH_ERR, format, ap);
 	va_end(ap);
 	exit(code);
-	return -1;
 }
 
 int print(const char *str)
@@ -251,10 +249,9 @@ NORETURN void panic(const char *format, ...)
 	print("--- DON'T PANIC! ---\n");
 	print(buf);
 	print_trace(5);
-	loop();
+	while (1)
+		__asm__ volatile("cli\nhlt");
 #else
 	err(1, buf);
 #endif
-	while (1)
-		;
 }
-- 
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