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diff --git a/ports/sysdeps/unix/sysv/linux/m68k/sysdep.h b/ports/sysdeps/unix/sysv/linux/m68k/sysdep.h
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index 0000000000..b288712541
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+++ b/ports/sysdeps/unix/sysv/linux/m68k/sysdep.h
@@ -0,0 +1,326 @@
+/* Copyright (C) 1996, 1997, 1998, 2000, 2003, 2004, 2006, 2010, 2012
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Written by Andreas Schwab, <schwab@issan.informatik.uni-dortmund.de>,
+ December 1995.
+
+ 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 <tls.h>
+
+/* Defines RTLD_PRIVATE_ERRNO. */
+#include <dl-sysdep.h>
+
+/* For Linux we can use the system call table in the header file
+ /usr/include/asm/unistd.h
+ of the kernel. But these symbols do not follow the SYS_* syntax
+ so we have to redefine the `SYS_ify' macro here. */
+#undef SYS_ify
+#define SYS_ify(syscall_name) __NR_##syscall_name
+
+#ifdef __ASSEMBLER__
+
+/* Linux uses a negative return value to indicate syscall errors, unlike
+ most Unices, which use the condition codes' carry flag.
+
+ Since version 2.1 the return value of a system call might be negative
+ even if the call succeeded. E.g., the `lseek' system call might return
+ a large offset. Therefore we must not anymore test for < 0, but test
+ for a real error by making sure the value in %d0 is a real error
+ number. Linus said he will make sure the no syscall returns a value
+ in -1 .. -4095 as a valid result so we can savely test with -4095. */
+
+/* We don't want the label for the error handler to be visible in the symbol
+ table when we define it here. */
+#ifdef PIC
+#define SYSCALL_ERROR_LABEL .Lsyscall_error
+#else
+#define SYSCALL_ERROR_LABEL __syscall_error
+#endif
+
+#undef PSEUDO
+#define PSEUDO(name, syscall_name, args) \
+ .text; \
+ ENTRY (name) \
+ DO_CALL (syscall_name, args); \
+ cmp.l &-4095, %d0; \
+ jcc SYSCALL_ERROR_LABEL
+
+#undef PSEUDO_END
+#define PSEUDO_END(name) \
+ SYSCALL_ERROR_HANDLER; \
+ END (name)
+
+#undef PSEUDO_NOERRNO
+#define PSEUDO_NOERRNO(name, syscall_name, args) \
+ .text; \
+ ENTRY (name) \
+ DO_CALL (syscall_name, args)
+
+#undef PSEUDO_END_NOERRNO
+#define PSEUDO_END_NOERRNO(name) \
+ END (name)
+
+#define ret_NOERRNO rts
+
+/* The function has to return the error code. */
+#undef PSEUDO_ERRVAL
+#define PSEUDO_ERRVAL(name, syscall_name, args) \
+ .text; \
+ ENTRY (name) \
+ DO_CALL (syscall_name, args); \
+ negl %d0
+
+#undef PSEUDO_END_ERRVAL
+#define PSEUDO_END_ERRVAL(name) \
+ END (name)
+
+#define ret_ERRVAL rts
+
+#ifdef PIC
+# if RTLD_PRIVATE_ERRNO
+# define SYSCALL_ERROR_HANDLER \
+SYSCALL_ERROR_LABEL: \
+ PCREL_OP (lea, rtld_errno, %a0, %a0); \
+ neg.l %d0; \
+ move.l %d0, (%a0); \
+ move.l &-1, %d0; \
+ /* Copy return value to %a0 for syscalls that are declared to return \
+ a pointer (e.g., mmap). */ \
+ move.l %d0, %a0; \
+ rts;
+# elif defined _LIBC_REENTRANT
+# ifndef NOT_IN_libc
+# define SYSCALL_ERROR_ERRNO __libc_errno
+# else
+# define SYSCALL_ERROR_ERRNO errno
+# endif
+# define SYSCALL_ERROR_HANDLER \
+SYSCALL_ERROR_LABEL: \
+ neg.l %d0; \
+ move.l %d0, -(%sp); \
+ cfi_adjust_cfa_offset (4); \
+ jbsr __m68k_read_tp@PLTPC; \
+ SYSCALL_ERROR_LOAD_GOT (%a1); \
+ add.l (SYSCALL_ERROR_ERRNO@TLSIE, %a1), %a0; \
+ move.l (%sp)+, (%a0); \
+ cfi_adjust_cfa_offset (-4); \
+ move.l &-1, %d0; \
+ /* Copy return value to %a0 for syscalls that are declared to return \
+ a pointer (e.g., mmap). */ \
+ move.l %d0, %a0; \
+ rts;
+# else /* !_LIBC_REENTRANT */
+/* Store (- %d0) into errno through the GOT. */
+# define SYSCALL_ERROR_HANDLER \
+SYSCALL_ERROR_LABEL: \
+ move.l (errno@GOTPC, %pc), %a0; \
+ neg.l %d0; \
+ move.l %d0, (%a0); \
+ move.l &-1, %d0; \
+ /* Copy return value to %a0 for syscalls that are declared to return \
+ a pointer (e.g., mmap). */ \
+ move.l %d0, %a0; \
+ rts;
+# endif /* _LIBC_REENTRANT */
+#else
+# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
+#endif /* PIC */
+
+/* Linux takes system call arguments in registers:
+
+ syscall number %d0 call-clobbered
+ arg 1 %d1 call-clobbered
+ arg 2 %d2 call-saved
+ arg 3 %d3 call-saved
+ arg 4 %d4 call-saved
+ arg 5 %d5 call-saved
+ arg 6 %a0 call-clobbered
+
+ The stack layout upon entering the function is:
+
+ 24(%sp) Arg# 6
+ 20(%sp) Arg# 5
+ 16(%sp) Arg# 4
+ 12(%sp) Arg# 3
+ 8(%sp) Arg# 2
+ 4(%sp) Arg# 1
+ (%sp) Return address
+
+ (Of course a function with say 3 arguments does not have entries for
+ arguments 4 and 5.)
+
+ Separate move's are faster than movem, but need more space. Since
+ speed is more important, we don't use movem. Since %a0 and %a1 are
+ scratch registers, we can use them for saving as well. */
+
+#define DO_CALL(syscall_name, args) \
+ move.l &SYS_ify(syscall_name), %d0; \
+ DOARGS_##args \
+ trap &0; \
+ UNDOARGS_##args
+
+#define DOARGS_0 /* No arguments to frob. */
+#define UNDOARGS_0 /* No arguments to unfrob. */
+#define _DOARGS_0(n) /* No arguments to frob. */
+
+#define DOARGS_1 _DOARGS_1 (4)
+#define _DOARGS_1(n) move.l n(%sp), %d1; _DOARGS_0 (n)
+#define UNDOARGS_1 UNDOARGS_0
+
+#define DOARGS_2 _DOARGS_2 (8)
+#define _DOARGS_2(n) move.l %d2, %a0; cfi_register (%d2, %a0); \
+ move.l n(%sp), %d2; _DOARGS_1 (n-4)
+#define UNDOARGS_2 UNDOARGS_1; move.l %a0, %d2; cfi_restore (%d2)
+
+#define DOARGS_3 _DOARGS_3 (12)
+#define _DOARGS_3(n) move.l %d3, %a1; cfi_register (%d3, %a1); \
+ move.l n(%sp), %d3; _DOARGS_2 (n-4)
+#define UNDOARGS_3 UNDOARGS_2; move.l %a1, %d3; cfi_restore (%d3)
+
+#define DOARGS_4 _DOARGS_4 (16)
+#define _DOARGS_4(n) move.l %d4, -(%sp); \
+ cfi_adjust_cfa_offset (4); cfi_rel_offset (%d4, 0); \
+ move.l n+4(%sp), %d4; _DOARGS_3 (n)
+#define UNDOARGS_4 UNDOARGS_3; move.l (%sp)+, %d4; \
+ cfi_adjust_cfa_offset (-4); cfi_restore (%d4)
+
+#define DOARGS_5 _DOARGS_5 (20)
+#define _DOARGS_5(n) move.l %d5, -(%sp); \
+ cfi_adjust_cfa_offset (4); cfi_rel_offset (%d5, 0); \
+ move.l n+4(%sp), %d5; _DOARGS_4 (n)
+#define UNDOARGS_5 UNDOARGS_4; move.l (%sp)+, %d5; \
+ cfi_adjust_cfa_offset (-4); cfi_restore (%d5)
+
+#define DOARGS_6 _DOARGS_6 (24)
+#define _DOARGS_6(n) _DOARGS_5 (n-4); move.l %a0, -(%sp); \
+ cfi_adjust_cfa_offset (4); \
+ move.l n+12(%sp), %a0;
+#define UNDOARGS_6 move.l (%sp)+, %a0; cfi_adjust_cfa_offset (-4); \
+ UNDOARGS_5
+
+
+#define ret rts
+#if 0 /* Not used by Linux */
+#define r0 %d0
+#define r1 %d1
+#define MOVE(x,y) movel x , y
+#endif
+
+#else /* not __ASSEMBLER__ */
+
+/* Define a macro which expands into the inline wrapper code for a system
+ call. */
+#undef INLINE_SYSCALL
+#define INLINE_SYSCALL(name, nr, args...) \
+ ({ unsigned int _sys_result = INTERNAL_SYSCALL (name, , nr, args); \
+ if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sys_result, ), 0))\
+ { \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (_sys_result, )); \
+ _sys_result = (unsigned int) -1; \
+ } \
+ (int) _sys_result; })
+
+#undef INTERNAL_SYSCALL_DECL
+#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
+
+/* Define a macro which expands inline into the wrapper code for a system
+ call. This use is for internal calls that do not need to handle errors
+ normally. It will never touch errno. This returns just what the kernel
+ gave back. */
+#undef INTERNAL_SYSCALL
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
+ ({ unsigned int _sys_result; \
+ { \
+ /* Load argument values in temporary variables
+ to perform side effects like function calls
+ before the call used registers are set. */ \
+ LOAD_ARGS_##nr (args) \
+ LOAD_REGS_##nr \
+ register int _d0 asm ("%d0") = name; \
+ asm volatile ("trap #0" \
+ : "=d" (_d0) \
+ : "0" (_d0) ASM_ARGS_##nr \
+ : "memory"); \
+ _sys_result = _d0; \
+ } \
+ (int) _sys_result; })
+#define INTERNAL_SYSCALL(name, err, nr, args...) \
+ INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args)
+
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err) \
+ ((unsigned int) (val) >= -4095U)
+
+#undef INTERNAL_SYSCALL_ERRNO
+#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
+
+#define LOAD_ARGS_0()
+#define LOAD_REGS_0
+#define ASM_ARGS_0
+#define LOAD_ARGS_1(a1) \
+ LOAD_ARGS_0 () \
+ int __arg1 = (int) (a1);
+#define LOAD_REGS_1 \
+ register int _d1 asm ("d1") = __arg1; \
+ LOAD_REGS_0
+#define ASM_ARGS_1 ASM_ARGS_0, "d" (_d1)
+#define LOAD_ARGS_2(a1, a2) \
+ LOAD_ARGS_1 (a1) \
+ int __arg2 = (int) (a2);
+#define LOAD_REGS_2 \
+ register int _d2 asm ("d2") = __arg2; \
+ LOAD_REGS_1
+#define ASM_ARGS_2 ASM_ARGS_1, "d" (_d2)
+#define LOAD_ARGS_3(a1, a2, a3) \
+ LOAD_ARGS_2 (a1, a2) \
+ int __arg3 = (int) (a3);
+#define LOAD_REGS_3 \
+ register int _d3 asm ("d3") = __arg3; \
+ LOAD_REGS_2
+#define ASM_ARGS_3 ASM_ARGS_2, "d" (_d3)
+#define LOAD_ARGS_4(a1, a2, a3, a4) \
+ LOAD_ARGS_3 (a1, a2, a3) \
+ int __arg4 = (int) (a4);
+#define LOAD_REGS_4 \
+ register int _d4 asm ("d4") = __arg4; \
+ LOAD_REGS_3
+#define ASM_ARGS_4 ASM_ARGS_3, "d" (_d4)
+#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
+ LOAD_ARGS_4 (a1, a2, a3, a4) \
+ int __arg5 = (int) (a5);
+#define LOAD_REGS_5 \
+ register int _d5 asm ("d5") = __arg5; \
+ LOAD_REGS_4
+#define ASM_ARGS_5 ASM_ARGS_4, "d" (_d5)
+#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
+ LOAD_ARGS_5 (a1, a2, a3, a4, a5) \
+ int __arg6 = (int) (a6);
+#define LOAD_REGS_6 \
+ register int _a0 asm ("a0") = __arg6; \
+ LOAD_REGS_5
+#define ASM_ARGS_6 ASM_ARGS_5, "a" (_a0)
+
+#endif /* not __ASSEMBLER__ */
+
+/* Pointer mangling is not yet supported for M68K. */
+#define PTR_MANGLE(var) (void) (var)
+#define PTR_DEMANGLE(var) (void) (var)
+
+#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
+/* M68K needs system-supplied DSO to access TLS helpers
+ even when statically linked. */
+# define NEED_STATIC_SYSINFO_DSO 1
+#endif
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