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/* System call interface. C-SKY ABIV2 version.
Copyright (C) 2018 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
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
/* long syscall(long sysnum, long a, long b, long c, long d, long e, long f) */
ENTRY (syscall)
subi sp, 8
stw r4, (sp, 0)
stw r5, (sp, 4)
mov t0, r7
/* Put system call number in r7, adjust shift for arguments
and load extra arguments from stack. */
mov r7, a0
mov a0, a1
mov a1, a2
mov a2, a3
ldw a3, (sp, 8)
ldw r4, (sp, 12)
ldw r5, (sp, 16)
trap 0
/* Restore temp registers. */
mov r7, t0
ldw r4, (sp, 0)
ldw r5, (sp, 4)
addi sp, 8
/* Check return value. */
lrw t0, 0xfffff000
cmphs a0, t0
bf 1f
#ifdef __PIC__
subi sp, 8
stw gb, (sp, 0)
stw lr, (sp, 4)
grs gb, .Lgetpc
.Lgetpc:
lrw t0, .Lgetpc@GOTPC
addu gb, gb, t0
lrw t0, __syscall_error@PLT
ldr.w t0, (gb, t0 << 0)
jsr t0
ldw gb, (sp, 0)
ldw lr, (sp, 4)
addi sp, 8
#else
jmpi __syscall_error
#endif /* __PIC__ */
1:
rts
PSEUDO_END (syscall)
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