diff options
| author | Ian Moffett <ian@osmora.org> | 2024-07-04 23:41:00 -0400 |
|---|---|---|
| committer | Ian Moffett <ian@osmora.org> | 2024-07-04 23:41:00 -0400 |
| commit | ae83d32a56c38e5c7cd4497d64432387d4350a55 (patch) | |
| tree | cf3b4832b4ddd4b47e7016f9e2b217654d8781d0 /lib/libc/src/arch | |
| parent | 398e92ea9c4fdfbf5464eb99f3af79f6d583d693 (diff) | |
lib: Add initial libc
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'lib/libc/src/arch')
| -rw-r--r-- | lib/libc/src/arch/amd64/crt0.S | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/libc/src/arch/amd64/crt0.S b/lib/libc/src/arch/amd64/crt0.S new file mode 100644 index 0000000..9dc0cbf --- /dev/null +++ b/lib/libc/src/arch/amd64/crt0.S @@ -0,0 +1,45 @@ +/* + * 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. + */ + +#include <sys/syscall.h> + +.text +.globl _start +_start: + // Mark end of callstack + xor %rbp, %rbp + + // Load context and jump to the entry + lea (%rsp), %rdi + call __libc_entry + + // Exit returning status + mov $1, %rax + int $0x80 + ud2 |