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/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright © 2023 Keith Packard
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _M68K_SEMIHOST_H_
#define _M68K_SEMIHOST_H_
#include <stdio.h>
#include <errno.h>
#include <endian.h>
#include <sys/types.h>
#include <sys/stat.h>
#define HOSTED_EXIT 0
#define HOSTED_INIT_SIM 1
#define HOSTED_OPEN 2
#define HOSTED_CLOSE 3
#define HOSTED_READ 4
#define HOSTED_WRITE 5
#define HOSTED_LSEEK 6
#define HOSTED_RENAME 7
#define HOSTED_UNLINK 8
#define HOSTED_STAT 9
#define HOSTED_FSTAT 10
#define HOSTED_GETTIMEOFDAY 11
#define HOSTED_ISATTY 12
#define HOSTED_SYSTEM 13
#define GDB_O_RDONLY 0
#define GDB_O_WRONLY 1
#define GDB_O_RDWR 2
#define GDB_O_APPEND 8
#define GDB_O_CREAT 0x200
#define GDB_O_TRUNC 0x400
#define GDB_O_EXCL 0x800
typedef uint32_t my_mode_t;
typedef uint32_t my_time_t;
struct m68k_stat
{
uint32_t my_dev; /* device */
uint32_t my_ino; /* inode */
my_mode_t my_mode; /* protection */
uint32_t my_nlink; /* number of hard links */
uint32_t my_uid; /* user ID of owner */
uint32_t my_gid; /* group ID of owner */
uint32_t my_rdev; /* device type (if inode device) */
uint64_t my_size; /* total size, in bytes */
uint64_t my_blksize; /* blocksize for filesystem I/O */
uint64_t my_blocks; /* number of blocks allocated */
my_time_t my_atime; /* time of last access */
my_time_t my_mtime; /* time of last modification */
my_time_t my_ctime; /* time of last change */
};
static inline
copy_stat(struct stat *restrict statbuf, struct m68k_stat *m68k_stat)
{
statbuf->st_dev = be32toh(m68k_stat->my_dev);
statbuf->st_ino = be32toh(m68k_stat->my_ino);
statbuf->st_mode = be32toh(m68k_stat->my_mode);
statbuf->st_nlink = be32toh(m68k_stat->my_nlink);
statbuf->st_uid = be32toh(m68k_stat->my_uid);
statbuf->st_gid = be32toh(m68k_stat->my_gid);
statbuf->st_rdev = be32toh(m68k_stat->my_rdev);
statbuf->st_size = be32toh(m68k_stat->my_size);
statbuf->st_blksize = be32toh(m68k_stat->my_blksize);
statbuf->st_blocks = be32toh(m68k_stat->my_blocks);
statbuf->st_atime = be32toh(m68k_stat->my_atime);
statbuf->st_mtime = be32toh(m68k_stat->my_mtime);
statbuf->st_ctime = be32toh(m68k_stat->my_ctime);
}
struct m68k_semihost {
uintptr_t args[4];
};
intptr_t
m68k_semihost(int func, struct m68k_semihost *args);
static inline intptr_t m68k_semihost1_immediate(int func, uintptr_t arg0) {
return m68k_semihost(func, (struct m68k_semihost *) arg0);
};
static inline intptr_t m68k_semihost1(int func, uintptr_t arg0) {
struct m68k_semihost args;
intptr_t ret;
args.args[0] = arg0;
m68k_semihost(func, &args);
ret = args.args[0];
if (ret < 0)
errno = args.args[1];
return ret;
};
static inline intptr_t m68k_semihost2(int func, uintptr_t arg0, uintptr_t arg1) {
struct m68k_semihost args;
intptr_t ret;
args.args[0] = arg0;
args.args[1] = arg1;
m68k_semihost(func, &args);
ret = args.args[0];
if (ret < 0)
errno = args.args[1];
return ret;
};
static inline intptr_t m68k_semihost3(int func, uintptr_t arg0, uintptr_t arg1, uintptr_t arg2) {
struct m68k_semihost args;
intptr_t ret;
args.args[0] = arg0;
args.args[1] = arg1;
args.args[2] = arg2;
m68k_semihost(func, &args);
ret = args.args[0];
if (ret < 0)
errno = args.args[1];
return ret;
};
static inline uint64_t m68k_semihost4_64(int func, uintptr_t arg0, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3) {
struct m68k_semihost args;
uint64_t ret;
args.args[0] = arg0;
args.args[1] = arg1;
args.args[2] = arg2;
args.args[3] = arg3;
m68k_semihost(func, &args);
ret = ((uint64_t) args.args[0] << 32) | args.args[1];
if ((int64_t) ret < 0)
errno = args.args[2];
return ret;
};
static inline intptr_t m68k_semihost4(int func, uintptr_t arg0, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3) {
struct m68k_semihost args;
intptr_t ret;
args.args[0] = arg0;
args.args[1] = arg1;
args.args[2] = arg2;
args.args[3] = arg3;
m68k_semihost(func, &args);
ret = args.args[0];
if (ret < 0)
errno = args.args[1];
return ret;
};
#endif /* _M68K_SEMIHOST_H_ */
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