aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/unix/sysv/linux/m68k/sysdep.h
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/unix/sysv/linux/m68k/sysdep.h')
-rw-r--r--sysdeps/unix/sysv/linux/m68k/sysdep.h295
1 files changed, 0 insertions, 295 deletions
diff --git a/sysdeps/unix/sysv/linux/m68k/sysdep.h b/sysdeps/unix/sysv/linux/m68k/sysdep.h
deleted file mode 100644
index 091dfc9c7d..0000000000
--- a/sysdeps/unix/sysv/linux/m68k/sysdep.h
+++ /dev/null
@@ -1,295 +0,0 @@
-/* Copyright (C) 1996, 1997, 1998, 2000, 2003, 2004 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#include <sysdeps/unix/sysdep.h>
-#include <sysdeps/m68k/sysdep.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
-#ifdef __STDC__
-# define SYS_ify(syscall_name) __NR_##syscall_name
-#else
-# define SYS_ify(syscall_name) __NR_/**/syscall_name
-#endif
-
-#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: \
- lea (rtld_errno, %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;
-# else /* !RTLD_PRIVATE_ERRNO */
-/* Store (- %d0) into errno through the GOT. */
-# if defined _LIBC_REENTRANT
-# define SYSCALL_ERROR_HANDLER \
-SYSCALL_ERROR_LABEL: \
- neg.l %d0; \
- move.l %d0, -(%sp); \
- jbsr __errno_location@PLTPC; \
- move.l (%sp)+, (%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;
-# else /* !_LIBC_REENTRANT */
-# 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 */
-# endif /* RTLD_PRIVATE_ERRNO */
-#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
-
- The stack layout upon entering the function is:
-
- 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; move.l n(%sp), %d2; _DOARGS_1 (n-4)
-#define UNDOARGS_2 UNDOARGS_1; move.l %a0, %d2
-
-#define DOARGS_3 _DOARGS_3 (12)
-#define _DOARGS_3(n) move.l %d3, %a1; move.l n(%sp), %d3; _DOARGS_2 (n-4)
-#define UNDOARGS_3 UNDOARGS_2; move.l %a1, %d3
-
-#define DOARGS_4 _DOARGS_4 (16)
-#define _DOARGS_4(n) move.l %d4, -(%sp); move.l n+4(%sp), %d4; _DOARGS_3 (n)
-#define UNDOARGS_4 UNDOARGS_3; move.l (%sp)+, %d4
-
-#define DOARGS_5 _DOARGS_5 (20)
-#define _DOARGS_5(n) move.l %d5, -(%sp); move.l n+4(%sp), %d5; _DOARGS_4 (n)
-#define UNDOARGS_5 UNDOARGS_4; move.l (%sp)+, %d5
-
-
-#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(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") = __NR_##name; \
- asm volatile ("trap #0" \
- : "=d" (_d0) \
- : "0" (_d0) ASM_ARGS_##nr \
- : "memory"); \
- _sys_result = _d0; \
- } \
- (int) _sys_result; })
-
-#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__ */