From 45955fe61844d94f7faa660eda9e515a6571e8c3 Mon Sep 17 00:00:00 2001 From: caiyinyu Date: Tue, 19 Jul 2022 09:20:50 +0800 Subject: LoongArch: Linux Syscall Interface --- sysdeps/unix/sysv/linux/loongarch/sysdep.S | 53 ++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/loongarch/sysdep.S (limited to 'sysdeps/unix/sysv/linux/loongarch/sysdep.S') diff --git a/sysdeps/unix/sysv/linux/loongarch/sysdep.S b/sysdeps/unix/sysv/linux/loongarch/sysdep.S new file mode 100644 index 0000000..a4db2a9 --- /dev/null +++ b/sysdeps/unix/sysv/linux/loongarch/sysdep.S @@ -0,0 +1,53 @@ +/* syscall error handlers + Copyright (C) 2022 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 + . */ + +#include + +#if IS_IN (libc) +# define errno __libc_errno +#endif + +ENTRY (__syscall_error) +/* Fall through to __syscall_set_errno */ +END (__syscall_error) + +/* Non-standard calling convention: argument in a0, return address in t0, + and clobber only t1. + */ +ENTRY (__syscall_set_errno) + +/* We got here because a0 < 0, but only codes in the range [-4095, -1] + represent errors. Otherwise, just return the result normally. + */ + li.d t1, -4096 + bgeu t1, a0, L (out) + sub.w a0, zero, a0 +#if RTLD_PRIVATE_ERRNO + la t1, rtld_errno +#elif defined(__PIC__) + la.tls.ie t1, errno + add.d t1, tp, t1 +#else + la.tls.le t1, errno + add.d t1, tp, t1 +#endif + st.w a0, t1, 0 + li.d a0, -1 +L (out): + ret +END (__syscall_set_errno) -- cgit v1.1