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/* Copyright (C) 2001-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <sys/asm.h>
/* Usage:
long int syscall (syscall_number, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
We need to do some arg shifting, syscall_number will be in v0. */
.text
NESTED (syscall, SZREG, ra)
.mask 0x00010000, -SZREG
.fmask 0x00000000, 0
PTR_ADDIU sp, -SZREG
cfi_adjust_cfa_offset (SZREG)
REG_S s0, (sp)
cfi_rel_offset (s0, 0)
move s0, a0
move a0, a1 /* shift arg1 - arg7. */
move a1, a2
move a2, a3
move a3, a4
move a4, a5
move a5, a6
move a6, a7
move v0, s0 /* Syscall number -> v0 */
syscall /* Do the system call. */
REG_L s0, (sp)
cfi_restore (s0)
PTR_ADDIU sp, SZREG
cfi_adjust_cfa_offset (-SZREG)
bne a3, zero, L(error)
ret
L(error):
SETUP_GP64_REG (a0, syscall)
PTR_LA t9, __syscall_error
RESTORE_GP64_REG
jr t9
END (syscall)
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