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/* ****************************************************************************
 * asm.h -- libfxsys' assembly utilities.
 * Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
 *
 * This file is part of the 'casiowin/libfxsys' module in libcarrot, an
 * experimental modular libc project.
 *
 * This file is governed by the CeCILL-C license under French law and abiding
 * by the rules of distribution of free software. You can use, modify and or
 * redistribute it under the terms of the CeCILL-C license as circulated by
 * CEA, CNRS and INRIA at the following URL: http://www.cecill.info
 *
 * As a counterpart to the access to the source code and rights to copy, modify
 * and redistribute granted by the license, users are provided only with a
 * limited warranty and the software's author, the holder of the economic
 * rights, and the successive licensors have only limited liability.
 *
 * In this respect, the user's attention is drawn to the risks associated with
 * loading, using, modifying and/or developing and reproducing the software by
 * the user in light of its specific status of free software, that may mean
 * that it is complicated to manipulate, and that also therefore means that it
 * is reserved for developers and experienced professionals having in-depth
 * computer knowledge. Users are therefore encouraged to load and test the
 * software's suitability as regards their requirements in conditions enabling
 * the security of their systems and/or data to be ensured and, more generally,
 * to use and operate it in the same conditions as regards security.
 *
 * The fact that you are presently reading this means you have had knowledge of
 * the CeCILL-C license and that you accept its terms.
 * ************************************************************************* */
/* Make the syscall entry */

# define ENTRY(_NAME) \
.section .text; \
.global _NAME; \
.type _NAME, @function; \
.align 2; \
_NAME:

/* Make the bare syscall, using the `sc_addr` symbol. */

# define SYSCALL_BARE(_NAME, _X) \
ENTRY(_NAME) \
	mov.l sc_addr, r2; \
	mov.l 1f, r0; \
	jmp @r2; \
	nop; \
1: .long _X

/* Define the local `sc_addr` local symbol, which is where the syscall table
 * address is. */

# define SYSCALL_ADDRESS \
sc_addr: .long 0x80010070

/* Define a syscall, defining and using the `sc_addr` local symbol. */

# define SYSCALL(_NAME, _X) \
SYSCALL_BARE(_NAME, _X); \
SYSCALL_ADDRESS