mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-05-28 00:02:28 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Fix some issues and do some code cleanup

Browse source
This commit is contained in:
Justine Tunney 2022-05-23 10:15:53 -07:00
parent 1f229e4efc
commit 312ed5c67c
72 changed files with 880 additions and 982 deletions
Download patch file Download diff file Expand all files Collapse all files

55
libc/runtime/clone-linux.S Normal file
View file

@ -0,0 +1,55 @@
/*-*- 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 2022 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 clone() system call on GNU/Systemd.
//
// @param rdi is flags
// @param rsi is top of stack
// @param rdx is ptid
// @param rcx is ctid
// @param r8 is tls
// @param r9 is func
// @param 8(rsp) is arg
// @return tid of child on success, or -1 w/ errno
sys_clone_linux:
push %rbp
mov %rsp,%rbp
.profilable
push %rbx
mov %rcx,%r10
mov 16(%rbp),%rbx
mov $56,%eax # __NR_clone
syscall
test %rax,%rax
jz 2f
cmp $-4095,%rax
jae 1f
0: pop %rbx
pop %rbp
ret
1: call systemfive_error
jmp 0b
2: xor %ebp,%ebp # child thread
mov %rbx,%rdi # arg
call *%r9 # func(arg)
xchg %eax,%edi # func(arg) → exitcode
mov $60,%eax # __NR_exit(exitcode)
syscall
.endfn sys_clone_linux,globl,hidden