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[RFC PATCH 09/10] C-SKY: Linux Syscall Interface
- From: Mao Han <han_mao at c-sky dot com>
- To: libc-help at sourceware dot org
- Cc: han_mao at c-sky dot com, ren_guo at c-sky dot com, yunhai_shang at c-sky dot com, qijie_tong at c-sky dot com, chunqiang_li at c-sky dot com
- Date: Fri, 16 Mar 2018 17:58:39 +0800
- Subject: [RFC PATCH 09/10] C-SKY: Linux Syscall Interface
- References: <cover.1521190937.git.han_mao@c-sky.com>
- References: <cover.1521190937.git.han_mao@c-sky.com>
Contains the Linux system call interface.
*sysdeps/unix/sysv/linux/csky/abiv2_brk.c: New file
*sysdeps/unix/sysv/linux/csky/abiv2_clone.S: New file
*sysdeps/unix/sysv/linux/csky/abiv2_getcontext.S: New file
*sysdeps/unix/sysv/linux/csky/abiv2_mmap.S: New file
*sysdeps/unix/sysv/linux/csky/abiv2_setcontext.S: New file
*sysdeps/unix/sysv/linux/csky/abiv2_socket.S: New file
*sysdeps/unix/sysv/linux/csky/abiv2_syscall.S: New file
*sysdeps/unix/sysv/linux/csky/abiv2_vfork.S: New file
*sysdeps/unix/sysv/linux/csky/alphasort64.c: New file
*sysdeps/unix/sysv/linux/csky/brk.c: New file
*sysdeps/unix/sysv/linux/csky/clone.S: New file
*sysdeps/unix/sysv/linux/csky/ftruncate64.c: New file
*sysdeps/unix/sysv/linux/csky/fxstat.c: New file
*sysdeps/unix/sysv/linux/csky/fxstatat.c: New file
*sysdeps/unix/sysv/linux/csky/getcontext.S: New file
*sysdeps/unix/sysv/linux/csky/getdents64.c: New file
*sysdeps/unix/sysv/linux/csky/libc-read_tp.S: New file
*sysdeps/unix/sysv/linux/csky/lockf64.c: New file
*sysdeps/unix/sysv/linux/csky/lxstat.c: New file
*sysdeps/unix/sysv/linux/csky/mmap.S: New file
*sysdeps/unix/sysv/linux/csky/pt-vfork.S: New file
*sysdeps/unix/sysv/linux/csky/read_tp.S: New file
*sysdeps/unix/sysv/linux/csky/readahead.c: New file
*sysdeps/unix/sysv/linux/csky/readdir64.c: New file
*sysdeps/unix/sysv/linux/csky/readdir64_r.c: New file
*sysdeps/unix/sysv/linux/csky/scandir64.c: New file
*sysdeps/unix/sysv/linux/csky/socket.S: New file
*sysdeps/unix/sysv/linux/csky/syscall.S: New file
*sysdeps/unix/sysv/linux/csky/syscalls.list: New file
*sysdeps/unix/sysv/linux/csky/versionsort64.c: New file
*sysdeps/unix/sysv/linux/csky/vfork.S: New file
*sysdeps/unix/sysv/linux/csky/xstat.c: New file
*sysdeps/unix/sysv/linux/csky/____longjmp_chk.S: New file
---
sysdeps/unix/sysv/linux/csky/____longjmp_chk.S | 129 ++++++++++++++++++
sysdeps/unix/sysv/linux/csky/abiv2_brk.c | 56 ++++++++
sysdeps/unix/sysv/linux/csky/abiv2_clone.S | 133 ++++++++++++++++++
sysdeps/unix/sysv/linux/csky/abiv2_getcontext.S | 72 ++++++++++
sysdeps/unix/sysv/linux/csky/abiv2_mmap.S | 62 +++++++++
sysdeps/unix/sysv/linux/csky/abiv2_setcontext.S | 95 +++++++++++++
sysdeps/unix/sysv/linux/csky/abiv2_socket.S | 152 +++++++++++++++++++++
sysdeps/unix/sysv/linux/csky/abiv2_syscall.S | 69 ++++++++++
sysdeps/unix/sysv/linux/csky/abiv2_vfork.S | 45 +++++++
sysdeps/unix/sysv/linux/csky/alphasort64.c | 1 +
sysdeps/unix/sysv/linux/csky/brk.c | 61 +++++++++
sysdeps/unix/sysv/linux/csky/clone.S | 125 +++++++++++++++++
sysdeps/unix/sysv/linux/csky/ftruncate64.c | 41 ++++++
sysdeps/unix/sysv/linux/csky/fxstat.c | 1 +
sysdeps/unix/sysv/linux/csky/fxstatat.c | 1 +
sysdeps/unix/sysv/linux/csky/getcontext.S | 108 +++++++++++++++
sysdeps/unix/sysv/linux/csky/getdents64.c | 1 +
sysdeps/unix/sysv/linux/csky/libc-read_tp.S | 1 +
sysdeps/unix/sysv/linux/csky/lockf64.c | 1 +
sysdeps/unix/sysv/linux/csky/lxstat.c | 2 +
sysdeps/unix/sysv/linux/csky/mmap.S | 65 +++++++++
sysdeps/unix/sysv/linux/csky/pt-vfork.S | 50 +++++++
sysdeps/unix/sysv/linux/csky/read_tp.S | 47 +++++++
sysdeps/unix/sysv/linux/csky/readahead.c | 44 ++++++
sysdeps/unix/sysv/linux/csky/readdir64.c | 1 +
sysdeps/unix/sysv/linux/csky/readdir64_r.c | 1 +
sysdeps/unix/sysv/linux/csky/scandir64.c | 1 +
sysdeps/unix/sysv/linux/csky/socket.S | 171 ++++++++++++++++++++++++
sysdeps/unix/sysv/linux/csky/syscall.S | 61 +++++++++
sysdeps/unix/sysv/linux/csky/syscalls.list | 7 +
sysdeps/unix/sysv/linux/csky/versionsort64.c | 1 +
sysdeps/unix/sysv/linux/csky/vfork.S | 49 +++++++
sysdeps/unix/sysv/linux/csky/xstat.c | 1 +
33 files changed, 1655 insertions(+)
create mode 100644 sysdeps/unix/sysv/linux/csky/____longjmp_chk.S
create mode 100644 sysdeps/unix/sysv/linux/csky/abiv2_brk.c
create mode 100644 sysdeps/unix/sysv/linux/csky/abiv2_clone.S
create mode 100644 sysdeps/unix/sysv/linux/csky/abiv2_getcontext.S
create mode 100644 sysdeps/unix/sysv/linux/csky/abiv2_mmap.S
create mode 100644 sysdeps/unix/sysv/linux/csky/abiv2_setcontext.S
create mode 100644 sysdeps/unix/sysv/linux/csky/abiv2_socket.S
create mode 100644 sysdeps/unix/sysv/linux/csky/abiv2_syscall.S
create mode 100644 sysdeps/unix/sysv/linux/csky/abiv2_vfork.S
create mode 100644 sysdeps/unix/sysv/linux/csky/alphasort64.c
create mode 100644 sysdeps/unix/sysv/linux/csky/brk.c
create mode 100644 sysdeps/unix/sysv/linux/csky/clone.S
create mode 100644 sysdeps/unix/sysv/linux/csky/ftruncate64.c
create mode 100644 sysdeps/unix/sysv/linux/csky/fxstat.c
create mode 100644 sysdeps/unix/sysv/linux/csky/fxstatat.c
create mode 100644 sysdeps/unix/sysv/linux/csky/getcontext.S
create mode 100644 sysdeps/unix/sysv/linux/csky/getdents64.c
create mode 100644 sysdeps/unix/sysv/linux/csky/libc-read_tp.S
create mode 100644 sysdeps/unix/sysv/linux/csky/lockf64.c
create mode 100644 sysdeps/unix/sysv/linux/csky/lxstat.c
create mode 100644 sysdeps/unix/sysv/linux/csky/mmap.S
create mode 100644 sysdeps/unix/sysv/linux/csky/pt-vfork.S
create mode 100644 sysdeps/unix/sysv/linux/csky/read_tp.S
create mode 100644 sysdeps/unix/sysv/linux/csky/readahead.c
create mode 100644 sysdeps/unix/sysv/linux/csky/readdir64.c
create mode 100644 sysdeps/unix/sysv/linux/csky/readdir64_r.c
create mode 100644 sysdeps/unix/sysv/linux/csky/scandir64.c
create mode 100644 sysdeps/unix/sysv/linux/csky/socket.S
create mode 100644 sysdeps/unix/sysv/linux/csky/syscall.S
create mode 100644 sysdeps/unix/sysv/linux/csky/syscalls.list
create mode 100644 sysdeps/unix/sysv/linux/csky/versionsort64.c
create mode 100644 sysdeps/unix/sysv/linux/csky/vfork.S
create mode 100644 sysdeps/unix/sysv/linux/csky/xstat.c
diff --git a/sysdeps/unix/sysv/linux/csky/____longjmp_chk.S b/sysdeps/unix/sysv/linux/csky/____longjmp_chk.S
new file mode 100644
index 0000000..1b8e954
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/____longjmp_chk.S
@@ -0,0 +1,129 @@
+/* Copyright (C) 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>
+
+ .section .rodata.str1.8,"aMS",@progbits,1
+ .align 2
+ .type longjmp_msg,@object
+longjmp_msg:
+ .string "longjmp causes uninitialized stack frame"
+ .size longjmp_msg, .-longjmp_msg
+ .text
+
+#define __longjmp ____longjmp_chk
+
+#ifdef __PIC__
+# ifdef __CSKYABIV2__
+# define CALL_FAIL \
+ subi sp, 8; \
+ stw gb, (sp, 0); \
+ grs gb, .Lgetpc1; \
+.Lgetpc1: \
+ lrw t0, .Lgetpc1@GOTPC; \
+ addu gb, gb, t0; \
+ lrw a0, longjmp_msg@GOTOFF; \
+ addu a0, a0, gb; \
+ lrw t0, (HIDDEN_JUMPTARGET(__fortify_fail))@PLT; \
+ ldr.w t0, (gb, t0 << 0); \
+ jsr t0; \
+ ldw gb, (sp, 0); \
+ addi sp, 8;
+# else /* __CSKYABIV2__ */
+# define CALL_FAIL \
+ subi sp, 8; \
+ stw gb, (sp); \
+ stw r15, (sp, 4); \
+ bsr .Lgetpc2; \
+.Lgetpc2: \
+ lrw gb, .Lgetpc2@GOTPC; \
+ add gb, r15; \
+ lrw a0, longjmp_msg@GOTOFF; \
+ addu a0, gb; \
+ lrw r7, (HIDDEN_JUMPTARGET(__fortify_fail))@PLT; \
+ add r7, gb; \
+ ldw r7, (r7); \
+ jsr r7; \
+ ldw gb, (sp, 0); \
+ ldw r15,(sp, 4); \
+ addi sp, 8;
+# endif /* __CSKYABIV2__ */
+#else /* __PIC__ */
+# define CALL_FAIL \
+ lrw a0, longjmp_msg; \
+ jsri HIDDEN_JUMPTARGET(__fortify_fail);
+#endif/* __PIC__ */
+
+#ifdef __CSKYABIV2__
+# define CHECK_SP(reg) \
+ cmplt sp, reg; \
+ bt .Lok1; \
+ mov r9, a0; \
+ mov t0, r7; \
+ lrw r7, __NR_sigaltstack; \
+ movi a0, 0; \
+ subi sp, 12; /* sizeof (stack_t) */ \
+ mov a1, sp; \
+ trap 0; \
+ mov r7, t0; \
+ cmpnei a0, 0; \
+ bt .Lok; \
+ ldw a1, (sp, 4); \
+ btsti a1, 1; \
+ bt .Lfail; \
+ ldw a1, (sp, 0); \
+ ldw a3, (sp, 8); \
+ add a1, a3; \
+ sub a1, reg; \
+ cmphs a1, a3; \
+ bt .Lok; \
+.Lfail: \
+ addi sp, 12; \
+ CALL_FAIL \
+.Lok: \
+ mov a0, r9; \
+.Lok1:
+#else
+# define CHECK_SP(reg) \
+ cmplt sp, reg; \
+ bt .Lok1; \
+ mov r9, a0; \
+ lrw r1, __NR_sigaltstack; \
+ movi a0, 0; \
+ subi sp, 12; /* sizeof (stack_t) */ \
+ mov a1, sp; \
+ trap 0; \
+ cmpnei a0, 0; \
+ bt .Lok; \
+ ldw a1, (sp, 4); \
+ btsti a1, 1; \
+ bt .Lfail; \
+ ldw a1, (sp, 0); \
+ ldw a3, (sp, 8); \
+ add a1, a3; \
+ sub a1, reg; \
+ cmphs a1, a3; \
+ bt .Lok; \
+.Lfail: \
+ addi sp, 12; \
+ CALL_FAIL \
+.Lok: \
+ mov a0, r9; \
+.Lok1:
+#endif
+
+#include <__longjmp.S>
diff --git a/sysdeps/unix/sysv/linux/csky/abiv2_brk.c b/sysdeps/unix/sysv/linux/csky/abiv2_brk.c
new file mode 100644
index 0000000..a564276
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/abiv2_brk.c
@@ -0,0 +1,56 @@
+/* brk system call for Linux/C-SKY.
+ Copyright (C) 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 <unistd.h>
+#include <sys/syscall.h>
+#include <errno.h>
+
+/* This must be initialized data because commons can't have aliases. */
+void * __curbrk = 0;
+
+/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt
+ to work around different old braindamage in the old Linux/x86 ELF
+ dynamic linker. Sigh. */
+weak_alias (__curbrk, ___brk_addr)
+
+int __brk (void *addr)
+{
+ void *newbrk;
+
+ {
+ register long int res __asm__("a0") = (long int)addr;
+
+ __asm__ volatile ("lrw l3, %1\n\t"
+ "trap 0 \n\t"
+ :"+r" (res)
+ :"i" (__NR_brk)
+ :"l3");
+ newbrk = (void *) res;
+ }
+ __curbrk = newbrk;
+
+ if (newbrk < addr)
+ {
+ __set_errno (ENOMEM);
+ return -1;
+ }
+
+ return 0;
+}
+
+weak_alias (__brk, brk)
diff --git a/sysdeps/unix/sysv/linux/csky/abiv2_clone.S b/sysdeps/unix/sysv/linux/csky/abiv2_clone.S
new file mode 100644
index 0000000..2fd3605
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/abiv2_clone.S
@@ -0,0 +1,133 @@
+/* Copyright (C) 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/>. */
+
+/* clone() is even more special than fork() as it mucks with stacks
+ and invokes a function in the right context after its all over. */
+
+#include <sysdep.h>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+#include <csky_readtp.h>
+
+#define CLONE_VM 8 /* 8 makes btsti easier, 0x00000100 in real */
+#define CLONE_THREAD 16 /* 0x00010000 in real */
+
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
+ pid_t *ptid, struct user_desc *tls, pid_t *ctid); */
+
+ .text
+ENTRY(__clone)
+ /* Sanity check arguments. */
+ cmpnei a0, 0 /* no NULL function pointers */
+ bf __error_arg
+ cmpnei a1, 0 /* no NULL function pointers */
+ bf __error_arg
+
+ subi a1, 8
+ stw a0, (a1, 0) /* insert the args onto the new stack */
+ stw a3, (a1, 4) /* insert the args onto the new stack */
+
+#ifdef RESET_PID
+ mov t0, a2 /* save a2(flags) */
+#endif
+ mov t1, r7 /* save r7 */
+ mov t2, r4 /* save r4 (has t2 ?)*/
+
+ mov a0, a2 /* arg1 = flags */
+ ldw a2, (sp, 0) /* arg3 = ptid */
+ ldw a3, (sp, 8) /* arg4 = ctid */
+ ldw r4, (sp, 4) /* arg5 = tls */
+ lrw r7, __NR_clone
+ trap 0
+
+ mov r7, t1 /* restore r7 */
+ mov r4, t2 /* restore r4 */
+ btsti a0, 31 /* is a0 less than zero? */
+ bt do_syscall_error
+ cmpnei a0, 0
+ bf 1f
+ rts
+PSEUDO_END (__clone)
+
+1:
+#ifdef RESET_PID
+ ldw a2, (sp, 0)
+ btsti t0, CLONE_THREAD /* judge flags */
+ bt 3f
+ csky_read_tp
+ mov a3, a0
+
+ btsti t0, CLONE_VM /* judge flags */
+ bmaski a0, 0 /* if CLONE_VM not set, pid=tid=-1 */
+ bt 2f
+ mov t1, r7
+ lrw r7, __NR_getpid /* else get pid via getpid syscall */
+ trap 0
+ mov r7, t1
+2:
+ lrw t0, PID_OFFSET
+ add t0, a3
+ stw a0, (t0) /* save pid */
+ lrw t0, TID_OFFSET
+ add t0, a3
+ stw a0, (t0) /* save tid */
+
+3:
+#endif /* RESET_PID */
+ ldw a0, (sp, 4) /* restore args from new sp */
+ ldw a1, (sp, 0) /* restore args from new sp */
+ addi sp, 8
+ jsr a1
+
+ /* exit */
+#ifdef __PIC__
+ grs t1, .Lgetpc1
+.Lgetpc1:
+ lrw t0, .Lgetpc1@GOTPC
+ addu t1, t1, t0
+ lrw t0, _exit@GOT
+ ldr.w t0, (t1, t0 << 0)
+#else
+ lrw t0, _exit /* exit */
+#endif /* __PIC__ */
+ jmp t0
+
+__error_arg:
+ lrw a0, -EINVAL
+
+do_syscall_error:
+#ifdef __PIC__
+ subi sp, 8
+ stw gb, (sp, 0)
+ stw r15, (sp, 4)
+ grs gb, .Lgetpc2
+.Lgetpc2:
+ lrw t0, .Lgetpc2@GOTPC
+ addu gb, gb, t0
+ lrw t0, __syscall_error@PLT
+ ldr.w t0, (gb, t0 << 0)
+ jsr t0
+ ldw gb, (sp, 0)
+ ldw r15, (sp, 4)
+ addi sp, 8
+#else
+ jmpi __syscall_error
+#endif /* __PIC__ */
+ rts
+
+libc_hidden_def (__clone)
+weak_alias (__clone, clone)
diff --git a/sysdeps/unix/sysv/linux/csky/abiv2_getcontext.S b/sysdeps/unix/sysv/linux/csky/abiv2_getcontext.S
new file mode 100644
index 0000000..c85cbac
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/abiv2_getcontext.S
@@ -0,0 +1,72 @@
+/* Copyright (C) 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>
+
+#include "ucontext_i.h"
+
+/* int getcontext (ucontext_t *ucp) */
+
+ENTRY(__getcontext)
+ /* No need to save r2-r7 or a0-a3 */
+ mov t0, a0
+
+ addi a0, MCONTEXT_CSKY_R4
+
+ stm r4-r13, (a0) /* save r4-r13 */
+ stw sp, (t0, MCONTEXT_CSKY_SP) /* save sp */
+ stw r15, (t0, MCONTEXT_CSKY_LR) /* save lr */
+ stw r15, (t0, MCONTEXT_CSKY_PC) /* Return to PC */
+ addi a0, t0, MCONTEXT_CSKY_R16
+ stm r16-r31, (a0) /* save r16-r31 */
+ movi a0, 0
+ stw a0, (t0, MCONTEXT_CSKY_A0) /* Return zero */
+
+ subi sp, 8
+ stw t0, (sp, 0) /* save t0 after "save sp" */
+
+ /* __sigprocmask(SIG_BLOCK, NULL, &(ucontext->uc_sigmask)) */
+ movi a0, SIG_BLOCK
+ movi a1, 0
+ addi a2, t0, UCONTEXT_SIGMASK
+
+ /* do sigprocmask syscall */
+#ifdef __PIC__
+ subi sp, 8
+ stw gb, (sp, 0)
+ grs gb, .Lgetpc
+.Lgetpc:
+ lrw a3, .Lgetpc@GOTPC
+ addu gb, gb, a3
+ lrw a3, __sigprocmask@PLT
+ ldr.w a3, (gb, a3 << 0)
+ jsr a3
+ ldw gb, (sp, 0)
+ addi sp, 8
+#else
+ jsri __sigprocmask
+#endif
+
+ ldw t0, (sp, 0)
+ addi sp, 8
+ /* restore r15 for sigprocmask changes*/
+ ldw r15, (t0, MCONTEXT_CSKY_LR)
+ movi a0, 0 /* return 0 */
+ jmp r15
+END(__getcontext)
+
+weak_alias(__getcontext, getcontext)
diff --git a/sysdeps/unix/sysv/linux/csky/abiv2_mmap.S b/sysdeps/unix/sysv/linux/csky/abiv2_mmap.S
new file mode 100644
index 0000000..e759ba2
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/abiv2_mmap.S
@@ -0,0 +1,62 @@
+/* Copyright (C) 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>
+
+/* void *mmap(void *addr, size_t len, int prot, int flags,
+ int fildes, off_t off); */
+
+ENTRY (__mmap)
+ subi sp, 24
+ stm a0-a3, (sp) /* store arg1-arg4 */
+ ldw t0, (sp, 24)
+ stw t0, (sp, 16) /* store arg5 */
+ ldw t0, (sp, 28)
+ stw t0, (sp, 20) /* store arg6 */
+
+ mov t0, r7 /* save r7 */
+ lrw r7, __NR_mmap
+ mov a0, sp
+ trap 0
+ addi sp, sp, 24
+ mov r7, t0
+ lrw t0, 0xfffff000
+ cmphs a0, t0
+ bf 1f
+#ifdef __PIC__
+ subi sp, 8
+ stw gb, (sp, 0)
+ stw r15, (sp, 4)
+ grs gb, .Lgetpc
+.Lgetpc:
+ lrw t0, .Lgetpc@GOTPC
+ addu gb, gb, t0
+ lrw t0, __syscall_error@PLT
+ ldr.w t0, (gb, t0 << 0)
+ jsr t0
+ ldw gb, (sp, 0)
+ ldw r15, (sp, 4)
+ addi sp, 8
+#else
+ jmpi __syscall_error
+#endif /* __PIC__ */
+1:
+ rts
+PSEUDO_END (__mmap)
+
+weak_alias (__mmap, mmap)
+libc_hidden_builtin_def (__mmap)
diff --git a/sysdeps/unix/sysv/linux/csky/abiv2_setcontext.S b/sysdeps/unix/sysv/linux/csky/abiv2_setcontext.S
new file mode 100644
index 0000000..d6c0d64
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/abiv2_setcontext.S
@@ -0,0 +1,95 @@
+/* Copyright (C) 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>
+
+#include "ucontext_i.h"
+
+/* int setcontext (const ucontext_t *ucp) */
+
+ENTRY(__setcontext)
+ mov t0, a0
+ subi sp, 8
+ stw a0, (sp, 0)
+
+ /* set sigmask */
+ movi a0, SIG_SETMASK
+ addi a1, t0, UCONTEXT_SIGMASK
+ movi a2, 0
+
+ /* do sigprocmask syscall */
+#ifdef __PIC__
+ subi sp, 8
+ stw gb, (sp, 0)
+ grs gb, .Lgetpc1
+.Lgetpc1:
+ lrw a3, .Lgetpc1@GOTPC
+ addu gb, gb, a3
+ lrw a3, __sigprocmask@PLT
+ ldr.w a3, (gb, a3 << 0)
+ jsr a3
+ ldw gb, (sp, 0)
+ addi sp, 8
+#else
+ jsri __sigprocmask
+#endif /* __PIC__ */
+
+ ldw t0, (sp, 0)
+ addi sp, 8
+ /* set r0-r11. Load a0-a3, for makecontext requires */
+ addi t1, t0, MCONTEXT_CSKY_A0
+ ldm r0-r11, (t1)
+ ldw sp, (t0, MCONTEXT_CSKY_SP) /* load sp */
+ ldw r15, (t0, MCONTEXT_CSKY_LR) /* load lr */
+ ldw t0, (t0, MCONTEXT_CSKY_PC) /* load start addr */
+ jmp t0
+END(setcontext)
+weak_alias(__setcontext, setcontext)
+
+ENTRY(__startcontext)
+ mov a0, r9
+ cmpnei r9, 0 /* r9 was set in makecontext */
+ bf 1f /* null, then exit */
+
+ /* call setcontext */
+#ifdef __PIC__
+ grs t1, .Lgetpc2
+.Lgetpc2:
+ lrw t0, .Lgetpc2@GOTPC
+ addu t1, t1, t0
+ lrw t0, __setcontext@GOT
+ ldr.w t0, (t1, t0 << 0)
+#else
+ lrw t0, __setcontext
+#endif
+ jsr t0
+
+1:
+ /* call _exit */
+#ifdef __PIC__
+ grs t1, .Lgetpc3
+.Lgetpc3:
+ lrw t0, .Lgetpc3@GOTPC
+ addu t1, t1, t0
+ lrw t0, _exit@GOT
+ ldr.w t0, (t1, t0 << 0)
+#else
+ lrw t0, _exit
+#endif
+ jsr t0
+
+END(__startcontext)
diff --git a/sysdeps/unix/sysv/linux/csky/abiv2_socket.S b/sysdeps/unix/sysv/linux/csky/abiv2_socket.S
new file mode 100644
index 0000000..f2b8ca8
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/abiv2_socket.S
@@ -0,0 +1,152 @@
+/* Copyright (C) 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-cancel.h>
+#include <socketcall.h>
+
+#define P(a, b) P2(a, b)
+#define P2(a, b) a##b
+
+/* The socket-oriented system calls are handled unusally in Linux.
+ They are all gated through the single `socketcall' system call number.
+ `socketcall' takes two arguments: the first is the subcode, specifying
+ which socket function is being called; and the second is a pointer to
+ the arguments to the specific function.
+
+ The .S files for the other calls just #define socket and #include this. */
+
+#ifndef NARGS
+#ifdef socket
+#error NARGS not defined
+#endif
+#define NARGS 3
+#endif
+
+#ifndef __socket
+# ifndef NO_WEAK_ALIAS
+# define __socket P(__,socket)
+# else
+# define __socket socket
+# endif
+#endif
+
+ENTRY (__socket)
+ subi sp, 32
+ .cfi_def_cfa_offset 32
+#if NARGS >= 1
+ stw a0, (sp, 0)
+#endif
+
+#if NARGS >= 2
+ stw a1, (sp, 4)
+#endif
+
+#if NARGS >= 3
+ stw a2, (sp, 8)
+#endif
+
+#if NARGS >= 4
+ stw a3, (sp, 12)
+#endif
+
+#if NARGS >= 5
+ ldw t0, (sp, 32)
+ stw t0, (sp, 16)
+#endif
+
+#if NARGS >= 6
+ ldw t0, (sp, 36)
+ stw t0, (sp, 20)
+#endif
+
+#if defined NEED_CANCELLATION && defined CENABLE
+ stw r15, (sp, 24)
+ .cfi_offset 15, -8
+ stw gb, (sp, 28)
+ .cfi_offset 28, -4
+ SINGLE_THREAD_P
+ bt .Lsocket_cancel
+#endif
+
+ mov t0, r7
+ lrw r7, __NR_socketcall
+ movi a0, P(SOCKOP_, socket)
+ mov a1, sp
+ trap 0
+ cfi_remember_state
+ .cfi_def_cfa_offset 40
+ addi sp, 32
+ .cfi_def_cfa_offset 0
+ mov r7, t0
+ PSEUDO_RET
+
+#if defined NEED_CANCELLATION && defined CENABLE
+.Lsocket_cancel:
+ /* GET GB */
+ cfi_restore_state
+ grs gb, .Lgetpc
+.Lgetpc:
+ lrw t0, .Lgetpc@GOTPC
+ addu gb, t0
+
+ CENABLE
+ mov t1, a0 /* save CENABLE return value */
+ mov t0, r7
+ lrw r7, __NR_socketcall
+ movi a0, P(SOCKOP_, socket)
+ mov a1, sp
+ trap 0
+ stw a0, (sp, 0)
+ mov r7, t0
+ mov a0, t1
+ CDISABLE
+ ldw a0, (sp, 0)
+ ldw r15, (sp, 24)
+ .cfi_restore 15
+ ldw gb, (sp, 28)
+ .cfi_restore 28
+ addi sp, 32
+ .cfi_def_cfa_offset 0
+ btsti a0, 31
+ bf 3f
+#ifdef __PIC__
+ subi sp, 8
+ stw gb, (sp, 0)
+ stw r15, (sp, 4)
+ /* must cal gb here, gb used by SYSCALL_ERROR ,why? FIXME */
+ grs gb, .Lgetpc2
+.Lgetpc2:
+ lrw t0, .Lgetpc2@GOTPC
+ addu gb, gb, t0
+
+ bsr SYSCALL_ERROR
+ ldw r15, (sp, 4)
+ ldw gb, (sp, 0)
+ addi sp, 8
+#else
+ jmpi SYSCALL_ERROR
+#endif
+3:
+ rts
+#endif
+
+PSEUDO_END(__socket)
+
+libc_hidden_def (__socket)
+#ifndef NO_WEAK_ALIAS
+weak_alias (__socket, socket)
+#endif
diff --git a/sysdeps/unix/sysv/linux/csky/abiv2_syscall.S b/sysdeps/unix/sysv/linux/csky/abiv2_syscall.S
new file mode 100644
index 0000000..90218bf
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/abiv2_syscall.S
@@ -0,0 +1,69 @@
+/* Copyright (C) 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>
+
+/* long syscall(long sysnum, long a, long b, long c, long d, long e, long f) */
+
+ENTRY (syscall)
+ subi sp, 8
+ stw r4, (sp, 0)
+ stw r5, (sp, 4)
+
+ mov t0, r7
+ mov r7, a0 /* r7 = sysnum */
+
+ mov a0, a1 /* arg1 = a */
+ mov a1, a2 /* arg2 = b */
+ mov a2, a3 /* arg3 = c */
+ ldw a3, (sp, 8) /* arg4 = d */
+ ldw r4, (sp, 12) /* arg5 = e */
+ ldw r5, (sp, 16) /* arg6 = f */
+ trap 0
+
+ mov r7, t0
+
+ ldw r4, (sp, 0)
+ ldw r5, (sp, 4)
+ addi sp, 8
+
+ lrw t0, 0xfffff000
+ cmphs a0, t0
+ bt do_syscall_error
+ rts
+PSEUDO_END (syscall)
+
+do_syscall_error:
+#ifdef __PIC__
+ subi sp, 8
+ stw gb, (sp, 0)
+ stw lr, (sp, 4)
+ grs gb, .Lgetpc
+.Lgetpc:
+ lrw t0, .Lgetpc@GOTPC
+ addu gb, gb, t0
+ lrw t0, __syscall_error@PLT
+ ldr.w t0, (gb, t0 << 0)
+ jsr t0
+ ldw gb, (sp, 0)
+ ldw lr, (sp, 4)
+ addi sp, 8
+#else
+ jmpi __syscall_error
+#endif /* __PIC__ */
+ rts
+
diff --git a/sysdeps/unix/sysv/linux/csky/abiv2_vfork.S b/sysdeps/unix/sysv/linux/csky/abiv2_vfork.S
new file mode 100644
index 0000000..88cdc8a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/abiv2_vfork.S
@@ -0,0 +1,45 @@
+/* Copyright (C) 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>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+
+/* Clone the calling process, but without copying the whole address space.
+ The calling process is suspended until the new process exits or is
+ replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
+ and the process ID of the new process to the old process. */
+
+ENTRY (__vfork)
+#ifdef SAVE_PID
+ SAVE_PID
+#endif
+ mov t0, r7
+ lrw r7, __NR_vfork
+ trap 0
+ mov r7, t0
+#ifdef RESTORE_PID
+ RESTORE_PID
+#endif
+ PSEUDO_RET
+ rts
+
+PSEUDO_END (__vfork)
+libc_hidden_def (__vfork)
+
+weak_alias (__vfork, vfork)
+strong_alias (__vfork, __libc_vfork)
diff --git a/sysdeps/unix/sysv/linux/csky/alphasort64.c b/sysdeps/unix/sysv/linux/csky/alphasort64.c
new file mode 100644
index 0000000..0b5ae47
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/alphasort64.c
@@ -0,0 +1 @@
+#include <sysdeps/unix/sysv/linux/i386/alphasort64.c>
diff --git a/sysdeps/unix/sysv/linux/csky/brk.c b/sysdeps/unix/sysv/linux/csky/brk.c
new file mode 100644
index 0000000..00d42c2
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/brk.c
@@ -0,0 +1,61 @@
+/* brk system call for Linux/C-SKY.
+ Copyright (C) 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/>. */
+
+#ifdef __CSKYABIV2__
+# include "abiv2_brk.c"
+#else
+
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <errno.h>
+
+/* This must be initialized data because commons can't have aliases. */
+void * __curbrk = 0;
+
+/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt
+ to work around different old braindamage in the old Linux/x86 ELF
+ dynamic linker. Sigh. */
+weak_alias (__curbrk, ___brk_addr)
+
+int __brk (void *addr)
+{
+ void *newbrk;
+
+ {
+ register long int res __asm__("r2") = (long int)addr;
+
+ __asm__ volatile ("lrw r1, %1\n\t"
+ "trap 0\n\t"
+ :"+r" (res)
+ :"i" (__NR_brk) :"r1");
+ newbrk = (void *) res;
+ }
+ __curbrk = newbrk;
+
+ if (newbrk < addr)
+ {
+ __set_errno (ENOMEM);
+ return -1;
+ }
+
+ return 0;
+}
+
+weak_alias (__brk, brk)
+
+#endif
diff --git a/sysdeps/unix/sysv/linux/csky/clone.S b/sysdeps/unix/sysv/linux/csky/clone.S
new file mode 100644
index 0000000..67ac7d1
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/clone.S
@@ -0,0 +1,125 @@
+/* Copyright (C) 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/>. */
+
+/* clone() is even more special than fork() as it mucks with stacks
+ and invokes a function in the right context after its all over. */
+
+#ifdef __CSKYABIV2__
+# include "abiv2_clone.S"
+#else
+
+# include <sysdep.h>
+# define _ERRNO_H 1
+# include <bits/errno.h>
+# include <csky_readtp.h>
+
+# define CLONE_VM 8 /* 11 makes btsti easier, 0x00000100 in real */
+# define CLONE_THREAD 16 /* 0x00010000 in real */
+
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
+ pid_t *ptid, struct user_desc *tls, pid_t *ctid); */
+
+ .text
+ENTRY(__clone)
+ /* Sanity check arguments. */
+ cmpnei r2, 0
+ bf __error_arg /* no NULL function pointers */
+ cmpnei r3, 0
+ bf __error_arg /* no NULL function pointers */
+
+ subi r3, 8
+ stw r2, (r3, 0) /* insert the args onto the new stack */
+ stw r5, (r3, 4) /* insert the args onto the new stack */
+
+ ldw r5, (sp, 0) /* arg4 = ctid */
+# ifdef RESET_PID
+ subi r3, 8
+ stw r4, (r3, 0x0) /* save r4(flags) */
+# endif
+
+ mov r2, r4 /* arg1 = flags */
+ mov r4, r6 /* arg3 = ptid */
+ mov r6, r7 /* arg5 = tls */
+ lrw r1, __NR_clone /* do syscall */
+ trap 0
+
+ btsti r2, 31 /* is r2 less than zero? */
+ bt do_syscall_error
+ cmpnei r2, 0
+ bf 1f
+ rts
+PSEUDO_END (__clone)
+
+1:
+# ifdef RESET_PID
+ ld.w r4, (sp, 0x0)
+ btsti r4, CLONE_THREAD /* judge flags */
+ bt 3f
+ csky_read_tp
+ mov r6, r2
+
+ btsti r4, CLONE_VM /* judge flags */
+ bmaski r2, 0 /* if CLONE_VM not set, pid=tid=-1 */
+ bt 2f
+ lrw r1, __NR_getpid /* else get pid via getpid syscall */
+ trap 0
+2:
+ lrw r7, PID_OFFSET
+ add r7, r6
+ stw r2, (r7) /* save pid */
+ lrw r7, TID_OFFSET
+ add r7, r6
+ stw r2, (r7) /* save tid */
+3:
+ addi sp, 8
+# endif /* RESET_PID */
+ ldw r2, (sp, 4) /* restore args from new sp */
+ ldw r3, (sp, 0) /* restore args from new sp */
+ addi sp, 8
+
+ jsr r3
+ lrw r1, __NR_exit
+ trap 0
+
+__error_arg:
+ lrw r2, -EINVAL
+
+do_syscall_error:
+# ifdef __PIC__
+ subi sp, 8
+ stw gb, (sp, 0)
+ stw r15, (sp, 4)
+ bsr .Lgetpc
+.Lgetpc:
+ lrw gb, .Lgetpc@GOTPC
+ addu gb, r15
+ lrw r7, __syscall_error@PLT
+ addu r7, gb
+ ldw r7, (r7)
+ jsr r7
+ ldw gb, (sp, 0)
+ ldw r15, (sp, 4)
+ addi sp, 8
+# else
+ jmpi __syscall_error
+# endif /* __PIC__ */
+ rts
+
+libc_hidden_def (__clone)
+weak_alias (__clone, clone)
+
+#endif /* __CSKYABIV2__*/
diff --git a/sysdeps/unix/sysv/linux/csky/ftruncate64.c b/sysdeps/unix/sysv/linux/csky/ftruncate64.c
new file mode 100644
index 0000000..47c38e6
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/ftruncate64.c
@@ -0,0 +1,41 @@
+/* Copyright (C) 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 <sys/types.h>
+#include <errno.h>
+#include <endian.h>
+#include <unistd.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+/* Truncate the file FD refers to to LENGTH bytes. */
+int
+__ftruncate64 (int fd, off64_t length)
+{
+ unsigned int low = length & 0xffffffff;
+ unsigned int high = length >> 32;
+#ifdef __CSKYABIV2__
+ int result = INLINE_SYSCALL (ftruncate64, 3, fd,
+ __LONG_LONG_PAIR (high, low));
+#else
+ int result = INLINE_SYSCALL (ftruncate64, 4, fd, 0,
+ __LONG_LONG_PAIR (high, low));
+#endif
+ return result;
+}
+weak_alias (__ftruncate64, ftruncate64)
diff --git a/sysdeps/unix/sysv/linux/csky/fxstat.c b/sysdeps/unix/sysv/linux/csky/fxstat.c
new file mode 100644
index 0000000..4f219f0
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/fxstat.c
@@ -0,0 +1 @@
+#include <sysdeps/unix/sysv/linux/i386/fxstat.c>
diff --git a/sysdeps/unix/sysv/linux/csky/fxstatat.c b/sysdeps/unix/sysv/linux/csky/fxstatat.c
new file mode 100644
index 0000000..0f8b313
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/fxstatat.c
@@ -0,0 +1 @@
+#include <sysdeps/unix/sysv/linux/i386/fxstatat.c>
diff --git a/sysdeps/unix/sysv/linux/csky/getcontext.S b/sysdeps/unix/sysv/linux/csky/getcontext.S
new file mode 100644
index 0000000..447c15b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/getcontext.S
@@ -0,0 +1,108 @@
+/* Copyright (C) 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/>. */
+
+#ifdef __CSKYABIV2__
+#include "abiv2_getcontext.S"
+#else
+
+#include <sysdep.h>
+
+#include "ucontext_i.h"
+
+/* int getcontext (ucontext_t *ucp) */
+
+ENTRY(__getcontext)
+ /* No need to save r2-r7 or a0-a3 */
+ mov r7, r2
+
+ /* return zero */
+ lrw r2, MCONTEXT_CSKY_A0
+ add r2, r7
+ movi r1, 0
+ stw r1, (r2)
+
+ lrw r2, MCONTEXT_CSKY_R8
+ add r2, r7
+ stw r8, (r2, 0) /* save r8 */
+ stw r9, (r2, 4) /* save r9 */
+ stw r10, (r2, 8) /* save r10 */
+ stw r11, (r2, 12) /* save r11 */
+ stw r12, (r2, 16) /* save r12 */
+ stw r13, (r2, 20) /* save r13 */
+ stw r14, (r2, 24) /* save r14 */
+ stw r15, (r2, 28) /* save lr */
+
+
+ lrw r2, MCONTEXT_CSKY_SP
+ add r2, r7
+ stw sp, (r2) /* save sp */
+
+ lrw r2, MCONTEXT_CSKY_LR
+ add r2, r7
+ stw r15, (r2) /* Return to LR */
+
+ lrw r2, MCONTEXT_CSKY_PC
+ add r2, r7
+ stw r15, (r2) /* Return to LR */
+
+ lrw r2, MCONTEXT_CSKY_A0
+ add r2, r7
+ movi r3, 0
+ stw r3, (r2) /* Return zero */
+
+ /* __sigprocmask(SIG_BLOCK, NULL, &(ucontext->uc_sigmask)) */
+ lrw r2, SIG_BLOCK
+ movi r3, 0
+ lrw r4, UCONTEXT_SIGMASK
+ add r4, r7
+
+ subi sp, 8
+ stw r7, (sp, 0)
+
+ /* do sigprocmask syscall */
+#ifdef __PIC__
+ subi sp, 8
+ stw gb, (sp, 0)
+ stw lr, (sp, 4)
+ bsr .Lgetpc
+.Lgetpc:
+ lrw gb, .Lgetpc@GOTPC
+ addu gb, r15
+ lrw r7, __sigprocmask@PLT
+ addu r7, gb
+ ldw r7, (r7)
+ jsr r7
+ ldw gb, (sp, 0)
+ ldw lr, (sp, 4)
+ addi sp, 8
+#else
+ jsri __sigprocmask
+#endif
+
+ ldw r7, (sp, 0)
+ addi sp, 8
+ lrw r2, MCONTEXT_CSKY_LR
+ add r2, r7
+ /* restore r15 for sigprocmask changes */
+ ldw r15, (r2)
+ movi r2, 0 /* return 0 */
+ jmp r15
+END(__getcontext)
+
+weak_alias(__getcontext, getcontext)
+
+#endif /* __CSKYABIV2__*/
diff --git a/sysdeps/unix/sysv/linux/csky/getdents64.c b/sysdeps/unix/sysv/linux/csky/getdents64.c
new file mode 100644
index 0000000..0c75fb5
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/getdents64.c
@@ -0,0 +1 @@
+#include <sysdeps/unix/sysv/linux/i386/getdents64.c>
diff --git a/sysdeps/unix/sysv/linux/csky/libc-read_tp.S b/sysdeps/unix/sysv/linux/csky/libc-read_tp.S
new file mode 100644
index 0000000..ca9d2b8
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/libc-read_tp.S
@@ -0,0 +1 @@
+#include <read_tp.S>
diff --git a/sysdeps/unix/sysv/linux/csky/lockf64.c b/sysdeps/unix/sysv/linux/csky/lockf64.c
new file mode 100644
index 0000000..a88f5a7
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/lockf64.c
@@ -0,0 +1 @@
+#include <sysdeps/unix/sysv/linux/i386/lockf64.c>
diff --git a/sysdeps/unix/sysv/linux/csky/lxstat.c b/sysdeps/unix/sysv/linux/csky/lxstat.c
new file mode 100644
index 0000000..2371cd9
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/lxstat.c
@@ -0,0 +1,2 @@
+#include <sysdeps/unix/sysv/linux/i386/lxstat.c>
+
diff --git a/sysdeps/unix/sysv/linux/csky/mmap.S b/sysdeps/unix/sysv/linux/csky/mmap.S
new file mode 100644
index 0000000..0d27ba5
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/mmap.S
@@ -0,0 +1,65 @@
+/* Copyright (C) 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/>. */
+
+#ifdef __CSKYABIV2__
+# include "abiv2_mmap.S"
+#else
+
+#include <sysdep.h>
+
+/*void *mmap(void *addr, size_t len, int prot, int flags,
+ int fildes, off_t off); */
+ENTRY (__mmap)
+ subi sp, 24
+ stw r2, (sp, 0)
+ stw r3, (sp, 4)
+ stw r4, (sp, 8)
+ stw r5, (sp, 12)
+ stw r6, (sp, 16)
+ stw r7, (sp, 20)
+ mov r2, sp
+ lrw r1, __NR_mmap
+ trap 0
+ addi sp, 24
+ lrw r3, 0xfffff000
+ cmphs r2, r3
+ bf 1f
+#ifdef __PIC__
+ subi sp, 8
+ stw gb, (sp, 0)
+ stw r15, (sp, 4)
+ bsr .Lgetpc
+.Lgetpc:
+ lrw gb, .Lgetpc@GOTPC
+ addu gb, r15
+ lrw r7, __syscall_error@PLT
+ addu r7, gb
+ ldw r7, (r7)
+ jsr r7
+ ldw gb, (sp, 0)
+ ldw r15, (sp, 4)
+ addi sp, 8
+#else
+ jmpi __syscall_error
+#endif /* __PIC__ */
+1:
+ rts
+PSEUDO_END (__mmap)
+
+weak_alias (__mmap, mmap)
+libc_hidden_builtin_def (__mmap)
+#endif /* __CSKYABVI2__*/
diff --git a/sysdeps/unix/sysv/linux/csky/pt-vfork.S b/sysdeps/unix/sysv/linux/csky/pt-vfork.S
new file mode 100644
index 0000000..9bbd34c
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/pt-vfork.S
@@ -0,0 +1,50 @@
+/* Copyright (C) 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>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+
+/* Clone the calling process, but without copying the whole address space.
+ The calling process is suspended until the new process exits or is
+ replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
+ and the process ID of the new process to the old process. */
+
+ENTRY (vfork_compat)
+#ifdef SAVE_PID
+ SAVE_PID
+#endif
+
+#ifdef __CSKYABIV2__
+ mov t0, r7
+ lrw r7, __NR_vfork
+ trap 0
+ mov r7, t0
+#else
+ lrw r1, __NR_vfork
+ trap 0
+#endif
+
+#ifdef RESTORE_PID
+ RESTORE_PID
+#endif
+ PSEUDO_RET
+ rts
+
+PSEUDO_END (vfork_compat)
+
+strong_alias (vfork_compat, vfork_compat2)
diff --git a/sysdeps/unix/sysv/linux/csky/read_tp.S b/sysdeps/unix/sysv/linux/csky/read_tp.S
new file mode 100644
index 0000000..99c6d1a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/read_tp.S
@@ -0,0 +1,47 @@
+/* Copyright (C) 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 <features.h>
+#include <sysdep.h>
+
+/* This function is exported from libc for use by user code. libpthread, librt,
+ and the dynamic linker get their own private copies, for
+ performance (and in the case of ld.so, out of necessity); those are
+ all hidden. */
+
+/*
+ * __read_tp
+ * clobbe r0, others had to be saved
+ *
+ */
+#if IS_IN (libc)
+ .global __read_tp
+#else
+ .hidden __read_tp
+#endif
+#ifdef __CSKYABIV2__
+ENTRY (__read_tp)
+ mov r0, r31
+ rts
+END (__read_tp)
+#else
+ENTRY (__read_tp)
+ trap 3
+ rts
+END (__read_tp)
+#endif
+
diff --git a/sysdeps/unix/sysv/linux/csky/readahead.c b/sysdeps/unix/sysv/linux/csky/readahead.c
new file mode 100644
index 0000000..47c44c3
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/readahead.c
@@ -0,0 +1,44 @@
+/* Provide kernel hint to read ahead.
+ Copyright (C) 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 <errno.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <endian.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+ssize_t
+__readahead (int fd, off64_t offset, size_t count)
+{
+#ifdef __CSKYABVI2__
+ return INLINE_SYSCALL (readahead, 4, fd,
+ __LONG_LONG_PAIR ((off_t) (offset >> 32),
+ (off_t) (offset & 0xffffffff)),
+ count);
+#else
+ return INLINE_SYSCALL (readahead, 5, fd, 0,
+ __LONG_LONG_PAIR ((off_t) (offset >> 32),
+ (off_t) (offset & 0xffffffff)),
+ count);
+
+#endif
+}
+
+weak_alias (__readahead, readahead)
diff --git a/sysdeps/unix/sysv/linux/csky/readdir64.c b/sysdeps/unix/sysv/linux/csky/readdir64.c
new file mode 100644
index 0000000..2ea26dd
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/readdir64.c
@@ -0,0 +1 @@
+#include <sysdeps/unix/sysv/linux/i386/readdir64.c>
diff --git a/sysdeps/unix/sysv/linux/csky/readdir64_r.c b/sysdeps/unix/sysv/linux/csky/readdir64_r.c
new file mode 100644
index 0000000..9f54f89
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/readdir64_r.c
@@ -0,0 +1 @@
+#include <sysdeps/unix/sysv/linux/i386/readdir64_r.c>
diff --git a/sysdeps/unix/sysv/linux/csky/scandir64.c b/sysdeps/unix/sysv/linux/csky/scandir64.c
new file mode 100644
index 0000000..506fd88
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/scandir64.c
@@ -0,0 +1 @@
+#include <sysdeps/unix/sysv/linux/i386/scandir64.c>
diff --git a/sysdeps/unix/sysv/linux/csky/socket.S b/sysdeps/unix/sysv/linux/csky/socket.S
new file mode 100644
index 0000000..3ceb232
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/socket.S
@@ -0,0 +1,171 @@
+/* Copyright (C) 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/>. */
+
+#ifdef __CSKYABIV2__
+#include "abiv2_socket.S"
+#else
+
+#include <sysdep-cancel.h>
+#include <socketcall.h>
+
+#define P(a, b) P2(a, b)
+#define P2(a, b) a##b
+
+/* The socket-oriented system calls are handled unusally in Linux.
+ They are all gated through the single `socketcall' system call number.
+ `socketcall' takes two arguments: the first is the subcode, specifying
+ which socket function is being called; and the second is a pointer to
+ the arguments to the specific function.
+
+ The .S files for the other calls just #define socket and #include this. */
+
+#ifndef NARGS
+#ifdef socket
+#error NARGS not defined
+#endif
+#define NARGS 3
+#endif
+
+#ifndef __socket
+# ifndef NO_WEAK_ALIAS
+# define __socket P(__,socket)
+# else
+# define __socket socket
+# endif
+#endif
+
+ENTRY (__socket)
+ subi sp, 32
+ subi sp, 8
+ .cfi_def_cfa_offset 40
+#if NARGS >= 1
+ stw r2, (sp, 0)
+ .cfi_offset 2, -40
+#endif
+
+#if NARGS >= 2
+ stw r3, (sp, 4)
+ .cfi_offset 3, -36
+#endif
+
+#if NARGS >= 3
+ stw r4, (sp, 8)
+ .cfi_offset 4, -32
+#endif
+
+#if NARGS >= 4
+ stw r5, (sp, 12)
+ .cfi_offset 5, -28
+#endif
+
+#if NARGS >= 5
+ stw r6, (sp, 16)
+ .cfi_offset 6, -24
+#endif
+
+#if NARGS >= 6
+ stw r7, (sp, 20)
+ .cfi_offset 7, -20
+#endif
+
+#if defined NEED_CANCELLATION && defined CENABLE
+ stw r15, (sp, 24)
+ .cfi_offset 15, -16
+ st.w r14, (sp, 28)
+ .cfi_offset 14, -12
+ st.w r9, (sp, 32)
+ .cfi_offset 9, -8
+ SINGLE_THREAD_P
+ bt .Lsocket_cancel
+#endif
+
+ lrw r1, __NR_socketcall
+ movi r2, P(SOCKOP_, socket)
+ mov r3, sp
+ trap 0
+ cfi_remember_state
+ .cfi_def_cfa_offset 40
+ addi sp, 32
+ addi sp, 8
+ .cfi_def_cfa_offset 0
+ mov r1, r15
+ PSEUDO_RET
+
+#if defined NEED_CANCELLATION && defined CENABLE
+.Lsocket_cancel:
+ cfi_restore_state
+ /* GET GB */
+ bsr 1f
+1:
+ lrw r14, 1b@GOTPC
+ add r14, lr
+
+ CENABLE
+ mov r4, r2 /* save CENABLE return value */
+ lrw r1, __NR_socketcall
+ movi r2, P(SOCKOP_, socket)
+ mov r3, sp
+ trap 0
+ mov r9, r2 /* (sp,0) save r9 */
+ mov r2, r4
+ CDISABLE
+ mov r2, r9
+ ldw r15, (sp, 24)
+ .cfi_restore 15
+ ldw r14, (sp, 28)
+ .cfi_restore 14
+ ldw r9, (sp, 32)
+ .cfi_restore 9
+ addi sp, 32
+ addi sp, 8
+ .cfi_def_cfa_offset 0
+ btsti r2, 31
+ bf 3f
+#ifdef __PIC__
+ subi sp, 8
+ .cfi_def_cfa_offset 8
+ stw gb, (sp, 0)
+ .cfi_offset 14, -8
+ stw r15, (sp, 4)
+ .cfi_offset 15, -4
+ bsr .Lgetpc
+.Lgetpc:
+ lrw gb, .Lgetpc@GOTPC
+ addu gb, r15
+ lrw r7, SYSCALL_ERROR@GOTOFF
+ addu r7, gb
+ jsr r7
+ ldw gb, (sp, 0)
+ ldw r15, (sp, 4)
+ addi sp, 8
+ .cfi_def_cfa_offset 0
+#else
+ jmpi SYSCALL_ERROR
+#endif
+
+3:
+ rts
+#endif
+
+PSEUDO_END (__socket)
+
+libc_hidden_def (__socket)
+#ifndef NO_WEAK_ALIAS
+weak_alias (__socket, socket)
+#endif
+
+#endif /* __CSKYABIV2__*/
diff --git a/sysdeps/unix/sysv/linux/csky/syscall.S b/sysdeps/unix/sysv/linux/csky/syscall.S
new file mode 100644
index 0000000..9b700a3
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/syscall.S
@@ -0,0 +1,61 @@
+/* Copyright (C) 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/>. */
+
+#ifdef __CSKYABIV2__
+# include "abiv2_syscall.S"
+#else
+
+# include <sysdep.h>
+
+ENTRY (syscall)
+ mov r1, r2 /* syscall num */
+
+ mov r2, r3 /* arg1 */
+ mov r3, r4 /* arg2 */
+ mov r4, r5 /* arg3 */
+ mov r5, r6 /* arg4*/
+ mov r6, r7 /* arg5*/
+ ld r7, (sp, 0) /* arg6 */
+ trap 0
+ lrw r3, 0xfffff000
+ cmphs r2, r3
+ bt do_syscall_error
+ rts
+PSEUDO_END (syscall)
+
+do_syscall_error:
+# ifdef __PIC__
+ subi sp, 8
+ stw gb, (sp, 0)
+ stw r15, (sp, 4)
+ bsr .Lgetpc
+.Lgetpc:
+ lrw gb, .Lgetpc@GOTPC
+ addu gb, r15
+ lrw r7, __syscall_error@PLT
+ addu r7, gb
+ ldw r7, (r7)
+ jsr r7
+ ldw gb, (sp, 0)
+ ldw r15, (sp, 4)
+ addi sp, 8
+# else
+ jmpi __syscall_error
+# endif /* __PIC__ */
+ rts
+
+#endif /* __CSKYABVI2__ */
diff --git a/sysdeps/unix/sysv/linux/csky/syscalls.list b/sysdeps/unix/sysv/linux/csky/syscalls.list
new file mode 100644
index 0000000..53cff69
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/syscalls.list
@@ -0,0 +1,7 @@
+# File name Caller Syscall name Args Strong name Weak names
+
+chown - chown32 i:sii __chown chown
+cacheflush - cacheflush i:pii _flush_cache cacheflush
+
+prlimit64 EXTRA prlimit64 i:iipp prlimit64
+fanotify_mark EXTRA fanotify_mark i:iiiiis fanotify_mark
diff --git a/sysdeps/unix/sysv/linux/csky/versionsort64.c b/sysdeps/unix/sysv/linux/csky/versionsort64.c
new file mode 100644
index 0000000..144b691
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/versionsort64.c
@@ -0,0 +1 @@
+#include <sysdeps/unix/sysv/linux/i386/versionsort64.c>
diff --git a/sysdeps/unix/sysv/linux/csky/vfork.S b/sysdeps/unix/sysv/linux/csky/vfork.S
new file mode 100644
index 0000000..913ca00
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/vfork.S
@@ -0,0 +1,49 @@
+/* Copyright (C) 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/>. */
+
+#ifdef __CSKYABIV2__
+# include "abiv2_vfork.S"
+#else
+
+# include <sysdep.h>
+# define _ERRNO_H 1
+# include <bits/errno.h>
+
+/* Clone the calling process, but without copying the whole address space.
+ The calling process is suspended until the new process exits or is
+ replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
+ and the process ID of the new process to the old process. */
+
+ENTRY (__vfork)
+# ifdef SAVE_PID
+ SAVE_PID
+# endif
+ lrw r1, __NR_vfork
+ trap 0
+# ifdef RESTORE_PID
+ RESTORE_PID
+# endif
+ PSEUDO_RET
+ rts
+
+PSEUDO_END (__vfork)
+libc_hidden_def (__vfork)
+
+weak_alias (__vfork, vfork)
+strong_alias (__vfork, __libc_vfork)
+
+#endif /* __CSKYABIV2__*/
diff --git a/sysdeps/unix/sysv/linux/csky/xstat.c b/sysdeps/unix/sysv/linux/csky/xstat.c
new file mode 100644
index 0000000..e9869f5
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/csky/xstat.c
@@ -0,0 +1 @@
+#include <sysdeps/unix/sysv/linux/i386/xstat.c>
--
2.7.4