From 128684dfb24b710cc67bf3de293b31c25746db0c Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Thu, 14 Mar 2024 22:01:56 -0400 Subject: libc: Initial hyra libc commit Signed-off-by: Ian Moffett --- lib/libc/linker/entry.S | 51 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 lib/libc/linker/entry.S (limited to 'lib/libc/linker/entry.S') diff --git a/lib/libc/linker/entry.S b/lib/libc/linker/entry.S new file mode 100644 index 0000000..1f982f9 --- /dev/null +++ b/lib/libc/linker/entry.S @@ -0,0 +1,51 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#if !defined(__hyra__) +#error "Hyra supported only" +#endif + +#include + +.section .text, "ax", @progbits +.globl _start +_start: + // Mark end of callstack + xor %rbp, %rbp + + // Load process context as per the sysv AMD64 ABI + lea (%rsp), %rdi + call entry + + // We are done, now we exit + mov $SYS_exit, %rax + xor %rdi, %rdi + int $0x80 + nop + ud2 -- cgit v1.2.3