From 69e6fe89fa9baafeca3e3515bb50897cd8ee7c35 Mon Sep 17 00:00:00 2001
From: Kacper <kacper@mail.openlinux.dev>
Date: Mon, 15 Dec 2025 18:24:54 +0100
Subject: Add getauxval and cleanup libc startup

---
 lib/libc/arch/x86_64/crt0.c | 63 ---------------------------------------------
 1 file changed, 63 deletions(-)
 delete mode 100644 lib/libc/arch/x86_64/crt0.c

(limited to 'lib/libc/arch/x86_64/crt0.c')

diff --git a/lib/libc/arch/x86_64/crt0.c b/lib/libc/arch/x86_64/crt0.c
deleted file mode 100644
index c60239d3..00000000
--- a/lib/libc/arch/x86_64/crt0.c
+++ /dev/null
@@ -1,63 +0,0 @@
-#include "asm/auxvec.h" // for AT_SYSINFO_EHDR
-#include <io_uring.h>
-#include <linux/auxvec.h> // for AT_NULL
-#include <linux/elf.h>	  // for Elf64_Ehdr
-#include <stdint.h>	  // for uintptr_t
-#include <stdlib.h>	  // for exit
-
-#define weak_reference(old, new) \
-	extern __typeof(old) new __attribute__((__weak__, __alias__(#old)))
-
-extern int main(int, char *[]);
-char **environ;
-char *__progname;
-
-struct __attribute__((packed)) auxv_t {
-	uintptr_t a_type;
-	uintptr_t a_val;
-} *__auxv;
-
-static void __vdso_setup(Elf64_Ehdr *vdso_addr __attribute__((unused)))
-{
-}
-
-weak_reference(__vdso_setup, vdso_setup);
-
-static void __io_uring_setup_(void)
-{
-}
-weak_reference(__io_uring_setup_, __io_uring_setup);
-
-__attribute__((used)) void __libc_start(uintptr_t *sp)
-{
-	char **argv;
-	int argc;
-
-	argc = (int)(*sp);
-	argv = (char **)(++sp);
-	__progname = argv[0];
-	sp += argc;
-	environ = (char **)(++sp);
-
-	while (*sp)
-		sp++;
-
-	__auxv = (struct auxv_t *)(++sp);
-	while (__auxv->a_type != AT_NULL) {
-		if (__auxv->a_type == AT_SYSINFO_EHDR) {
-			vdso_setup((Elf64_Ehdr *)__auxv->a_val);
-		}
-
-		__auxv++;
-	}
-
-	__io_uring_setup_();
-
-	exit(main(argc, argv));
-}
-
-__attribute__((noreturn, naked)) void _start(void)
-{
-	__asm__ __volatile__("mov %rsp, %rdi\n"
-			     "call __libc_start\n");
-}
-- 
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