diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/m68k/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/m68k/sysdep.h | 295 |
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__ */ |