From 9595fb8cd595028bece5174e7eddf660ae3dcc10 Mon Sep 17 00:00:00 2001 From: Waldemar Brodkorb Date: Thu, 31 May 2018 01:04:17 +0200 Subject: risc-v: initial 64 bit port, static only (no TLS/NPTL) Only a simple hello world is tested in qemu system emulation. --- libc/sysdeps/linux/riscv64/vfork.S | 42 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 libc/sysdeps/linux/riscv64/vfork.S (limited to 'libc/sysdeps/linux/riscv64/vfork.S') diff --git a/libc/sysdeps/linux/riscv64/vfork.S b/libc/sysdeps/linux/riscv64/vfork.S new file mode 100644 index 000000000..a624f2a7c --- /dev/null +++ b/libc/sysdeps/linux/riscv64/vfork.S @@ -0,0 +1,42 @@ +/* vfork for Linux, RISC-V version. + Copyright (C) 2005-2018 Free Software Foundation, Inc. + + 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 + . */ + +/* vfork() is just a special case of clone(). */ + +#include +#include +#define __ASSEMBLY__ +#include +#include + + .text +LEAF (__vfork) + + li a0, (CLONE_VFORK | CLONE_VM | SIGCHLD) + mv a1, sp + + li a7, __NR_clone + scall + + bltz a0, 1f + ret + +1: j __syscall_error +END (__vfork) +libc_hidden_def(vfork) + +weak_alias (__vfork, vfork) -- cgit v1.2.3