Initial steps into low level programming

Completed code snippets for shell spawning and exit() syscall.
cydtseng · Apr 11, 2022 · 744deab · 744deab
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diff --git a/exit_syscall/exitsys.c b/exit_syscall/exitsys.c
@@ -0,0 +1,9 @@
+char shellcode[] = "xbb\x00\x00\x00\x00"
+	           "xb8\x01\x00\x00\x00"
+		   "xcd\x80"
+
+int main() {
+	int *ret;
+	ret = (int *)&ret + 2;
+	*ret = (int)shellcode;
+}
diff --git a/shell_spawning/shell.c b/shell_spawning/shell.c
@@ -0,0 +1,13 @@
+#include<stdlib.h>
+#include<unistd.h> 
+
+
+int main() {
+	char *name[2];
+
+	name[0] = "/bin/sh";
+	name[1] = 0x0;
+	execve(name[0], name, 0x0);
+	exit(0);
+}
+