mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
7e0a09feec
This change ports APE Loader to Linux AARCH64, so that Raspberry Pi users can run programs like redbean, without the executable needing to modify itself. Progress has also slipped into this change on the issue of making progress better conforming to user expectations and industry standards regarding which symbols we're allowed to declare
49 lines
2.4 KiB
ArmAsm
49 lines
2.4 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
|
|
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2023 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/macros.internal.h"
|
|
|
|
// Invokes system call.
|
|
//
|
|
// This function has eight parameters. The first seven are for
|
|
// arguments passed along to the system call. The eight is for
|
|
// the magic number that indicates which system call is called
|
|
//
|
|
// The return value follows the Linux kernel convention, where
|
|
// errors are returned as `-errno`. BSD systems are normalized
|
|
// to follow this convention automatically.
|
|
SystemCall:
|
|
#ifdef __aarch64__
|
|
mov x8,x7
|
|
mov x9,0
|
|
adds x9,x9,0
|
|
svc 0
|
|
bcs 1f
|
|
ret
|
|
1: neg x0,x0
|
|
ret
|
|
#else
|
|
mov %rcx,%r10
|
|
mov 16(%rsp),%eax
|
|
clc
|
|
syscall
|
|
jnc 1f
|
|
neg %rax
|
|
1: ret
|
|
#endif
|
|
.endfn SystemCall,globl
|