1/* Copyright (C) 1992-2022 Free Software Foundation, Inc.
2   This file is part of the GNU C Library.
3
4   The GNU C Library is free software; you can redistribute it and/or
5   modify it under the terms of the GNU Lesser General Public
6   License as published by the Free Software Foundation; either
7   version 2.1 of the License, or (at your option) any later version.
8
9   The GNU C Library is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with the GNU C Library.  If not, see
16   <https://www.gnu.org/licenses/>.  */
17
18#include <sysdep.h>
19#include <errno.h>
20#include <sys/asm.h>
21
22	.set	nomips16
23
24#ifdef _LIBC_REENTRANT
25
26LOCALSZ= 3
27FRAMESZ= (((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK
28RAOFF= FRAMESZ-(1*SZREG)
29GPOFF= FRAMESZ-(2*SZREG)
30V0OFF= FRAMESZ-(3*SZREG)
31
32ENTRY(__syscall_error)
33#ifdef __PIC__
34	.set noat
35	SETUP_GPX (AT)
36	.set at
37#endif
38	PTR_SUBU sp, FRAMESZ
39	.set noat
40	SETUP_GPX64(GPOFF,AT)
41	.set at
42#ifdef __PIC__
43	SAVE_GP(GPOFF)
44#endif
45	REG_S	v0, V0OFF(sp)
46	REG_S	ra, RAOFF(sp)
47
48#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
49	/* We translate the system's EWOULDBLOCK error into EAGAIN.
50	   The GNU C library always defines EWOULDBLOCK==EAGAIN.
51	   EWOULDBLOCK_sys is the original number.  */
52	bne	v0, EWOULDBLOCK_sys, L(skip)
53	nop
54	li	v0, EAGAIN
55L(skip):
56#endif
57	/* Find our per-thread errno address  */
58	jal	__errno_location
59
60	/* Store the error value.  */
61	REG_L	t0, V0OFF(sp)
62	sw	t0, 0(v0)
63
64	/* And just kick back a -1.  */
65	REG_L	ra, RAOFF(sp)
66	RESTORE_GP64
67	PTR_ADDU sp, FRAMESZ
68	li	v0, -1
69	j	ra
70	END(__syscall_error)
71
72#else /* _LIBC_REENTRANT */
73
74
75ENTRY(__syscall_error)
76#ifdef __PIC__
77	SETUP_GPX (AT)
78#endif
79	SETUP_GPX64 (t9, AT)
80
81#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
82	/* We translate the system's EWOULDBLOCK error into EAGAIN.
83	   The GNU C library always defines EWOULDBLOCK==EAGAIN.
84	   EWOULDBLOCK_sys is the original number.  */
85	bne v0, EWOULDBLOCK_sys, L(skip)
86	li v0, EAGAIN
87L(skip):
88#endif
89	/* Store it in errno... */
90	sw v0, errno
91
92	/* And just kick back a -1.  */
93	li v0, -1
94
95	RESTORE_GP64
96	j ra
97	END(__syscall_error)
98#endif  /* _LIBC_REENTRANT  */
99