1/* Copyright (C) 1992-2024 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

source code of glibc/sysdeps/unix/mips/sysdep.S