shellblocks: src: Add utils_asm header for assembly primitives

Author: shaymargolis

shellblocks/src/utils_asm.h

@@ -0,0 +1,14 @@
+#ifndef SHELLCODE_BLOCKS_UTILS_ASM_H
+#define SHELLCODE_BLOCKS_UTILS_ASM_H
+
+#define GET_PC(dst) \
+    bal get_ip_reference; \
+    nop; \
+get_ip_reference:       \
+    move dst, $ra
+
+#define GET_ADDRESS(dst, label, base) \
+    move dst, base; \
+    addiu dst, (label - get_ip_reference)
+
+#endif // !SHELLCODE_BLOCKS_UTILS_ASM_H