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/* Assembler macros for m68k.
Copyright (C) 1998, 2003, 2010, 2012 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, see
<http://www.gnu.org/licenses/>. */
#include <sysdeps/generic/sysdep.h>
#ifdef __ASSEMBLER__
/* Syntactic details of assembler. */
/* 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
/* 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) \
cfi_startproc; \
CALL_MCOUNT
# undef END
# define END(name) \
cfi_endproc; \
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); \
cfi_adjust_cfa_offset (4); cfi_rel_offset (%fp, 0); \
move.l %sp, %fp; \
jbsr JUMPTARGET (_mcount); \
move.l (%sp)+, %fp; \
cfi_adjust_cfa_offset (-4); cfi_restore (%fp);
# else
# define CALL_MCOUNT /* Do nothing. */
# 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__ */
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