From 69ea4c1f65bff99575cd7f0210312dc355929240 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@openadk.org>
Date: Mon, 17 Apr 2017 14:48:50 +0200
Subject: or1k: add clone() from old GNU libc implementation

---
 libc/sysdeps/linux/or1k/sysdep.h | 104 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 libc/sysdeps/linux/or1k/sysdep.h

(limited to 'libc/sysdeps/linux/or1k/sysdep.h')

diff --git a/libc/sysdeps/linux/or1k/sysdep.h b/libc/sysdeps/linux/or1k/sysdep.h
new file mode 100644
index 000000000..4dba3f2a0
--- /dev/null
+++ b/libc/sysdeps/linux/or1k/sysdep.h
@@ -0,0 +1,104 @@
+/* Copyright (C) 2011-2014 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
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef _LINUX_OR1K_SYSDEP_H
+#define _LINUX_OR1K_SYSDEP_H 1
+
+#include <common/sysdep.h>
+#include <sys/syscall.h>
+
+/* In order to get __set_errno() definition in INLINE_SYSCALL.  */
+#ifndef __ASSEMBLER__
+#include <errno.h>
+#endif
+
+#undef SYS_ify
+#define SYS_ify(syscall_name)	(__NR_##syscall_name)
+
+#ifdef __ASSEMBLER__
+
+/* Local label name for asm code. */
+#define L(name)         .L##name
+
+#undef ret_ERRVAL
+#define ret_ERRVAL   l.jr r9; l.nop
+#define ret_NOERRNO  l.jr r9; l.nop
+
+#undef DO_CALL
+#define DO_CALL(syscall_name) \
+    l.addi r11, r0, SYS_ify (syscall_name); \
+    l.sys 1; \
+    l.nop
+
+#define PSEUDO(name, syscall_name, args) \
+  ENTRY (name); \
+  DO_CALL(syscall_name); \
+  /* if -4096 < ret < 0 holds, it's an error */ \
+  l.sfgeui r11, 0xf001; \
+  l.bf L(pseudo_end); \
+   l.nop
+
+#define PSEUDO_NOERRNO(name, syscall_name, args)  \
+  ENTRY (name);           \
+  DO_CALL(syscall_name)
+
+#define PSEUDO_END(name) \
+L(pseudo_end): \
+  l.j SYSCALL_ERROR_NAME; \
+  l.ori r3,r11,0; \
+  END (name)
+
+#define PSEUDO_END_NOERRNO(name) \
+  END (name)
+
+#ifndef PIC
+/* For static code, on error jump to __syscall_error directly. */
+# define SYSCALL_ERROR_NAME __syscall_error
+#elif NOT_IN_libc
+/* Use the internal name for libc/libpthread shared objects. */
+# define SYSCALL_ERROR_NAME __GI___syscall_error
+#else
+/* Otherwise, on error do a full PLT jump. */
+# define SYSCALL_ERROR_NAME plt(__syscall_error)
+#endif
+
+/* Make use of .size directive.  */
+#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
+
+/* Define an entry point visible from C.  */
+#define ENTRY(name)                                                           \
+  .globl C_SYMBOL_NAME(name);                                                 \
+  .type C_SYMBOL_NAME(name),@function;                                        \
+  .align 4;                                                                   \
+  C_LABEL(name)                                                               \
+  cfi_startproc;                                                              \
+
+#undef  END
+#define END(name)                                                             \
+  cfi_endproc;                                                                \
+  ASM_SIZE_DIRECTIVE(name)
+
+/* Since C identifiers are not normally prefixed with an underscore
+   on this system, the asm identifier `syscall_error' intrudes on the
+   C name space.  Make sure we use an innocuous name.  */
+#define syscall_error   __syscall_error
+
+/* Specify the size in bytes of a machine register.  */
+#define REGSIZE         4
+
+#endif	/* __ASSEMBLER__ */
+
+#endif /* linux/or1k/sysdep.h */
-- 
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