36960f0c76
Contains the Linux system call interface, as well as the definitions of
a handful of system calls.
2018-01-29 Palmer Dabbelt <palmer@sifive.com>
* sysdeps/riscv/nptl/nptl-sysdep.S: New file.
* sysdeps/unix/sysv/linux/riscv/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/clone.S: Likewise.
* sysdeps/unix/sysv/linux/riscv/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/pt-vfork.S: Likewise.
* sysdeps/unix/sysv/linux/riscv/syscall.c: Likewise.
* sysdeps/unix/sysv/linux/riscv/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/riscv/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/vfork.S: Likewise.
52 lines
1.5 KiB
ArmAsm
52 lines
1.5 KiB
ArmAsm
/* syscall error handlers
|
|
Copyright (C) 2011-2018 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>
|
|
|
|
#if IS_IN (libc)
|
|
# define errno __libc_errno
|
|
#endif
|
|
|
|
ENTRY (__syscall_error)
|
|
mv t0, ra
|
|
/* 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 t1, -4096
|
|
bleu a0, t1, 1f
|
|
neg a0, a0
|
|
#if RTLD_PRIVATE_ERRNO
|
|
sw a0, rtld_errno, t1
|
|
#elif defined(__PIC__)
|
|
la.tls.ie t1, errno
|
|
add t1, t1, tp
|
|
sw a0, 0(t1)
|
|
#else
|
|
lui t1, %tprel_hi(errno)
|
|
add t1, t1, tp, %tprel_add(errno)
|
|
sw a0, %tprel_lo(errno)(t1)
|
|
#endif
|
|
li a0, -1
|
|
1: jr t0
|
|
END (__syscall_set_errno)
|