cosmopolitan/libc/calls/pipe-sysv.S

47 lines
2.3 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 2020 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/dce.h"
#include "libc/macros.h"
.source __FILE__
/ Creates file descriptors for IPC.
/
/ @param rdi points to int3[2] that gets (reader, writer)
/ @return 0 on success or -1 w/ errno
/ @asyncsignalsafe
/ @see libc/sysv/syscalls.sh
/ @see pipe2()
pipe$sysv:
push %rbp
mov %rsp,%rbp
xor %esi,%esi # FreeBSD is pipe2()
call __pipe$sysv
#if SupportsXnu()
testb IsXnu() # XNU has special needs
jz 1f
cmp $-1,%eax
je 1f
mov %eax,(%rdi)
mov %edx,4(%rdi)
xor %eax,%eax
#endif
1: pop %rbp
ret
.endfn pipe$sysv,globl,hidden