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Diffstat (limited to 'sysdeps/m68k/sysdep.h')
| -rw-r--r-- | sysdeps/m68k/sysdep.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/sysdeps/m68k/sysdep.h b/sysdeps/m68k/sysdep.h new file mode 100644 index 0000000000..5998f4218b --- /dev/null +++ b/sysdeps/m68k/sysdep.h @@ -0,0 +1,118 @@ +/* Assembler macros for m68k. + Copyright (C) 1998 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. 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) \ + STABS_CURRENT_FILE1(""); \ + STABS_CURRENT_FILE(name); \ + .globl C_SYMBOL_NAME(name); \ + ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function); \ + .align ALIGNARG(2); \ + STABS_FUN(name); \ + C_LABEL(name) \ + CALL_MCOUNT + +#undef END +#define END(name) \ + ASM_SIZE_DIRECTIVE(name); \ + STABS_FUN_END(name) + +/* Remove the following two lines once the gdb bug is fixed. */ +#define STABS_CURRENT_FILE(name) \ + STABS_CURRENT_FILE1 (#name) +#define STABS_CURRENT_FILE1(name) \ + 1: .stabs name,100,0,0,1b +/* Emit stabs definition lines. We use F(0,1) and define t(0,1) as `int', + the same way gcc does it. */ +#define STABS_FUN(name) STABS_FUN1(name, name##:F(0,1)) +#define STABS_FUN1(name, namestr) \ + .stabs "int:t(0,1)=r(0,1);-2147483648;2147483647;",128,0,0,0; \ + .stabs #namestr,36,0,0,name +#define STABS_FUN_END(name) \ + 1: .stabs "",36,0,0,1b-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) + +#ifdef PIC +#define JUMPTARGET(name) name##@PLTPC +#else +#define JUMPTARGET(name) name +#endif + +#endif /* ASSEMBLER */ |