From ec31b208ab1644d98440af98eb4709ff9a729a00 Mon Sep 17 00:00:00 2001
From: Max Wash <mbswash@gmail.com>
Date: Thu, 23 Dec 2021 16:41:53 +0000
Subject: [PATCH] Implemented support for thread-local storage

---
 photon/libc/include/errno.h                      |  5 +++--
 photon/libc/sys/horizon/machine/x86_64/pthread.s | 11 +++++++++++
 2 files changed, 14 insertions(+), 2 deletions(-)
 create mode 100644 photon/libc/sys/horizon/machine/x86_64/pthread.s

diff --git a/photon/libc/include/errno.h b/photon/libc/include/errno.h
index b50e308..9dae652 100644
--- a/photon/libc/include/errno.h
+++ b/photon/libc/include/errno.h
@@ -3,13 +3,14 @@
 
 #include <sys/_errno.h>
 
-#define errno (*__errno_location())
+#define errno (__get_errno())
 
 #if defined(__cplusplus)
 extern "C" {
 #endif
 
-extern int *__errno_location(void);
+extern void __set_errno(int v);
+extern int __get_errno(void);
 
 #if defined(__cplusplus)
 }
diff --git a/photon/libc/sys/horizon/machine/x86_64/pthread.s b/photon/libc/sys/horizon/machine/x86_64/pthread.s
new file mode 100644
index 0000000..5dfb86f
--- /dev/null
+++ b/photon/libc/sys/horizon/machine/x86_64/pthread.s
@@ -0,0 +1,11 @@
+.global pthread_self
+.type pthread_self, @function
+
+pthread_self:
+    push %rbp
+    mov %rsp, %rbp
+
+    mov %fs:0, %rax
+
+    pop %rbp
+    ret