From 1c8d4e69205fd875f6bec3fa3bd929c2e7f52f62 Mon Sep 17 00:00:00 2001 From: Nicholas Noll Date: Sat, 20 Nov 2021 09:53:11 -0800 Subject: Feature: self hosting prototype implemented This is a large change. In order to remove myself from libc's arcane interface, I implemented an independent runtime layer. It is based on musl's wonderful implementation mostly. Critically, if libc is linked to the program, then we cooperate. Namely, we call start main and let libc do all initialization. If not, then we have a noop defined in rt3.a. The general structure of the file is: 1. sys/$os/$arch contains all architecture dependent code 2. sys/$os/port contains all code that depends on the os, but is portable 3. rt/$arch contains all the runtime architecture dependent code 4. rt/* contains the portable runtime code. Obviously testing is needed. Specifically, while code is checked in for the most popular architectures, it only has been tested on one computer! Overall this is exciting and as been educational. --- include/u.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/u.h') diff --git a/include/u.h b/include/u.h index 333d6b2..d415d82 100644 --- a/include/u.h +++ b/include/u.h @@ -108,6 +108,11 @@ typedef __builtin_va_list va_list; // ------------------------------------------------------------------ // global macros +/* weak aliasing */ +#define noreturn _Noreturn +#define hidden __attribute__((__visibility__("hidden"))) +#define weakalias(old, new) extern __typeof(old) new __attribute__((weak, alias(#old))) + /* offsets */ #define offsetof(t, d) __builtin_offsetof(t, d) -- cgit v1.2.1