diff options
Diffstat (limited to 'sysdeps/m68k/sysdep.h')
| -rw-r--r-- | sysdeps/m68k/sysdep.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/sysdeps/m68k/sysdep.h b/sysdeps/m68k/sysdep.h new file mode 100644 index 0000000000..f492ff617c --- /dev/null +++ b/sysdeps/m68k/sysdep.h @@ -0,0 +1,100 @@ +/* Assembler macros for m68k. + Copyright (C) 1998, 2003 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdeps/generic/sysdep.h> + +#ifdef __ASSEMBLER__ + +/* Syntactic details of assembler. */ + +# ifdef HAVE_ELF + +/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */ +# define ALIGNARG(log2) 1<<log2 +/* For ELF we need the `.type' directive to make shared libs work right. */ +# define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg +# define ASM_SIZE_DIRECTIVE(name) .size name,.-name + +/* In ELF C symbols are asm symbols. */ +# undef NO_UNDERSCORES +# define NO_UNDERSCORES + +# else + +# define ALIGNARG(log2) log2 +# define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */ +# define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */ + +# endif + + +/* Define an entry point visible from C. + + There is currently a bug in gdb which prevents us from specifying + incomplete stabs information. Fake some entries here which specify + the current source file. */ +# define ENTRY(name) \ + .globl C_SYMBOL_NAME(name); \ + ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function); \ + .align ALIGNARG(2); \ + C_LABEL(name) \ + CALL_MCOUNT + +# undef END +# define END(name) ASM_SIZE_DIRECTIVE(name) + + +/* If compiled for profiling, call `_mcount' at the start of each function. */ +# ifdef PROF +/* The mcount code relies on a normal frame pointer being on the stack + to locate our caller, so push one just for its benefit. */ +# define CALL_MCOUNT \ + move.l %fp, -(%sp); move.l %sp, %fp; \ + jbsr JUMPTARGET (mcount); \ + move.l (%sp)+, %fp; +# else +# define CALL_MCOUNT /* Do nothing. */ +# endif + +# ifdef NO_UNDERSCORES +/* 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 +# define mcount _mcount +# endif + +# define PSEUDO(name, syscall_name, args) \ + .globl syscall_error; \ + ENTRY (name) \ + DO_CALL (syscall_name, args); \ + jcc JUMPTARGET(syscall_error) + +# undef PSEUDO_END +# define PSEUDO_END(name) \ + END (name) + +# undef JUMPTARGET +# ifdef PIC +# define JUMPTARGET(name) name##@PLTPC +# else +# define JUMPTARGET(name) name +# endif + +#endif /* __ASSEMBLER__ */ |