2018-03-12 04:23:26 +08:00
|
|
|
/* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
|
|
|
*
|
|
|
|
|
* syscalls.S -- PRU system calls code
|
|
|
|
|
*
|
|
|
|
|
* Copyright (c) 2018-2019 Dimitar Dimitrov <dimitar@dinux.eu>
|
|
|
|
|
* 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.
|
|
|
|
|
*
|
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "newlib.h"
|
|
|
|
|
|
|
|
|
|
#include "syscall.h"
|
|
|
|
|
|
|
|
|
|
.extern _impure_ptr
|
|
|
|
|
|
|
|
|
|
/* Handle return from syscall. */
|
2021-05-09 21:10:45 +08:00
|
|
|
.section .text.__SC_ret, "ax"
|
2018-03-12 04:23:26 +08:00
|
|
|
.global __SC_ret
|
|
|
|
|
.type __SC_ret,@function
|
|
|
|
|
.func
|
|
|
|
|
__SC_ret:
|
|
|
|
|
/* Check for negative return code */
|
|
|
|
|
qbbc __SC_ret_skip_errno_set, r14, 31
|
|
|
|
|
|
|
|
|
|
/* Invert return code and store to errno (first int in _impure_ptr). */
|
|
|
|
|
rsb r14, r14, 0
|
|
|
|
|
ldi32 r1, _impure_ptr
|
2020-06-04 00:14:22 +08:00
|
|
|
lbbo r1, r1, 0, 4
|
2018-03-12 04:23:26 +08:00
|
|
|
sbbo r14, r1, 0, 4
|
|
|
|
|
/* Return -1 (for both int32_t or int64_t). */
|
|
|
|
|
fill r14, 8
|
|
|
|
|
|
|
|
|
|
__SC_ret_skip_errno_set:
|
|
|
|
|
ret
|
|
|
|
|
.endfunc
|
|
|
|
|
|
|
|
|
|
.macro SC fname, id
|
2021-05-09 21:10:45 +08:00
|
|
|
.section .text.\fname, "ax"
|
2018-03-12 04:23:26 +08:00
|
|
|
.global \fname
|
|
|
|
|
.type \fname,@function
|
|
|
|
|
.func
|
|
|
|
|
\fname:
|
|
|
|
|
ldi r1, \id
|
|
|
|
|
halt
|
|
|
|
|
jmp __SC_ret
|
|
|
|
|
.endfunc
|
|
|
|
|
.endm
|
|
|
|
|
|
|
|
|
|
/* Syscalls are used only by simulator. Real HW
|
|
|
|
|
users use other methods for communicating with
|
|
|
|
|
the host - remoteproc, rpmsg, shared memory. */
|
|
|
|
|
SC _exit, SYS_exit
|
|
|
|
|
SC _open, SYS_open
|
|
|
|
|
SC _close, SYS_close
|
|
|
|
|
SC _read, SYS_read
|
|
|
|
|
SC _write, SYS_write
|
|
|
|
|
SC _lseek, SYS_lseek
|
|
|
|
|
SC _unlink, SYS_unlink
|
|
|
|
|
SC _getpid, SYS_getpid
|
|
|
|
|
SC _kill, SYS_kill
|
|
|
|
|
SC _fstat, SYS_fstat
|
