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/* 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 */
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