1 files changed, 36 insertions, 0 deletions
diff --git a/lib/include/auxv.h b/lib/include/auxv.h
new file mode 100644
index 0000000..42dac38
--- /dev/null
+++ b/lib/include/auxv.h
@@ -0,0 +1,36 @@
+// Copyright (c) 2020 Johannes Stoelp
+
+#pragma once
+
+#include <stdint.h>
+
+/// ----------------
+/// Auxiliary Vector
+/// ----------------
+
+// NOTE: [x86-64] Either AT_EXECFD or AT_PHDR must be supplied by the Kernel.
+
+#define AT_NULL    0  /* [ignored] Mark end of auxiliary vetcor */
+#define AT_IGNORE  1  /* [ignored] */
+#define AT_EXECFD  2  /* [val] File descriptor of user program (in case Linux Kernel didn't mapped) */
+#define AT_PHDR    3  /* [ptr] Address of Phdr of use program (in case Kernel mapped user program) */
+#define AT_PHENT   4  /* [val] Size in bytes of one Phdr entry */
+#define AT_PHNUM   5  /* [val] Number of Phread entries */
+#define AT_PAGESZ  6  /* [val] System page size */
+#define AT_BASE    7  /* [ptr] `base address` interpreter was loaded to */
+#define AT_FLAGS   8  /* [val] */
+#define AT_ENTRY   9  /* [ptr] Entry point of user program */
+#define AT_NOTELF  10 /* [val] >0 if not an ELF file */
+#define AT_UID     11 /* [val] Real user id of process */
+#define AT_EUID    12 /* [val] Effective user id of process */
+#define AT_GID     13 /* [val] Real group id of process */
+#define AT_EGID    14 /* [val] Effective user id of process */
+#define AT_MAX_CNT 15
+
+typedef struct {
+    uint64_t tag;
+    union {
+        uint64_t val;
+        void* ptr;
+    };
+} Auxv64Entry;