mirror of
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e6e5906b6e
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2196 c046a42c-6fe2-441c-8c8c-71466251a162
217 lines
6.2 KiB
C
217 lines
6.2 KiB
C
/*
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* m68k/ColdFire Semihosting ssycall interface
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*
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* Copyright (c) 2005 CodeSourcery, LLC. Written by Paul Brook.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/time.h>
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#include <time.h>
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#include "qemu.h"
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#define HOSTED_EXIT 0
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#define HOSTED_PUTCHAR 1 /* Obsolete */
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#define HOSTED_OPEN 2
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#define HOSTED_CLOSE 3
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#define HOSTED_READ 4
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#define HOSTED_WRITE 5
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#define HOSTED_LSEEK 6
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#define HOSTED_RENAME 7
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#define HOSTED_UNLINK 8
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#define HOSTED_STAT 9
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#define HOSTED_FSTAT 10
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#define HOSTED_GETTIMEOFDAY 11
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#define HOSTED_ISATTY 12
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#define HOSTED_SYSTEM 13
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typedef uint32_t gdb_mode_t;
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typedef uint32_t gdb_time_t;
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struct m68k_gdb_stat {
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uint32_t gdb_st_dev; /* device */
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uint32_t gdb_st_ino; /* inode */
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gdb_mode_t gdb_st_mode; /* protection */
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uint32_t gdb_st_nlink; /* number of hard links */
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uint32_t gdb_st_uid; /* user ID of owner */
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uint32_t gdb_st_gid; /* group ID of owner */
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uint32_t gdb_st_rdev; /* device type (if inode device) */
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uint64_t gdb_st_size; /* total size, in bytes */
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uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
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uint64_t gdb_st_blocks; /* number of blocks allocated */
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gdb_time_t gdb_st_atime; /* time of last access */
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gdb_time_t gdb_st_mtime; /* time of last modification */
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gdb_time_t gdb_st_ctime; /* time of last change */
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};
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struct gdb_timeval {
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gdb_time_t tv_sec; /* second */
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uint64_t tv_usec; /* microsecond */
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};
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#define GDB_O_RDONLY 0x0
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#define GDB_O_WRONLY 0x1
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#define GDB_O_RDWR 0x2
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#define GDB_O_APPEND 0x8
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#define GDB_O_CREAT 0x200
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#define GDB_O_TRUNC 0x400
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#define GDB_O_EXCL 0x800
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static int translate_openflags(int flags)
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{
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int hf;
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if (flags & GDB_O_WRONLY)
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hf = O_WRONLY;
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else if (flags & GDB_O_RDWR)
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hf = O_RDWR;
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else
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hf = O_RDONLY;
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if (flags & GDB_O_APPEND) hf |= O_APPEND;
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if (flags & GDB_O_CREAT) hf |= O_CREAT;
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if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
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if (flags & GDB_O_EXCL) hf |= O_EXCL;
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return hf;
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}
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static void translate_stat(struct m68k_gdb_stat *p, struct stat *s)
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{
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p->gdb_st_dev = tswap16(s->st_dev);
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p->gdb_st_ino = tswap16(s->st_ino);
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p->gdb_st_mode = tswap32(s->st_mode);
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p->gdb_st_nlink = tswap16(s->st_nlink);
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p->gdb_st_uid = tswap16(s->st_uid);
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p->gdb_st_gid = tswap16(s->st_gid);
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p->gdb_st_rdev = tswap16(s->st_rdev);
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p->gdb_st_size = tswap32(s->st_size);
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p->gdb_st_atime = tswap32(s->st_atime);
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p->gdb_st_mtime = tswap32(s->st_mtime);
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p->gdb_st_ctime = tswap32(s->st_ctime);
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p->gdb_st_blksize = tswap32(s->st_blksize);
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p->gdb_st_blocks = tswap32(s->st_blocks);
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}
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static inline uint32_t check_err(CPUM68KState *env, uint32_t code)
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{
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if (code == (uint32_t)-1) {
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env->sr |= CCF_C;
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} else {
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env->sr &= ~CCF_C;
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env->dregs[0] = code;
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}
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return code;
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}
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#define ARG(x) tswap32(args[x])
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void do_m68k_semihosting(CPUM68KState *env, int nr)
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{
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uint32_t *args;
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args = (uint32_t *)env->dregs[1];
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switch (nr) {
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case HOSTED_EXIT:
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exit(env->dregs[0]);
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case HOSTED_OPEN:
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/* Assume name is NULL terminated. */
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check_err(env, open((char *)ARG(0), translate_openflags(ARG(2)),
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ARG(3)));
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break;
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case HOSTED_CLOSE:
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{
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/* Ignore attempts to close stdin/out/err. */
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int fd = ARG(0);
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if (fd > 2)
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check_err(env, close(fd));
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else
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check_err(env, 0);
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break;
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}
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case HOSTED_READ:
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check_err(env, read(ARG(0), (void *)ARG(1), ARG(2)));
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break;
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case HOSTED_WRITE:
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check_err(env, write(ARG(0), (void *)ARG(1), ARG(2)));
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break;
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case HOSTED_LSEEK:
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{
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uint64_t off;
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off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
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check_err(env, lseek(ARG(0), off, ARG(3)));
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}
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break;
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case HOSTED_RENAME:
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/* Assume names are NULL terminated. */
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check_err(env, rename((char *)ARG(0), (char *)ARG(2)));
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break;
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case HOSTED_UNLINK:
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/* Assume name is NULL terminated. */
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check_err(env, unlink((char *)ARG(0)));
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break;
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case HOSTED_STAT:
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/* Assume name is NULL terminated. */
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{
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struct stat s;
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int rc;
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rc = check_err(env, stat((char *)ARG(0), &s));
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if (rc == 0) {
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translate_stat((struct m68k_gdb_stat *)ARG(2), &s);
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}
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}
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break;
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case HOSTED_FSTAT:
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{
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struct stat s;
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int rc;
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rc = check_err(env, fstat(ARG(0), &s));
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if (rc == 0) {
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translate_stat((struct m68k_gdb_stat *)ARG(1), &s);
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}
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}
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break;
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case HOSTED_GETTIMEOFDAY:
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{
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struct timeval tv;
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struct gdb_timeval *p;
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int rc;
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rc = check_err(env, gettimeofday(&tv, NULL));
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if (rc != 0) {
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p = (struct gdb_timeval *)ARG(0);
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p->tv_sec = tswap32(tv.tv_sec);
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p->tv_usec = tswap64(tv.tv_usec);
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}
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}
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break;
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case HOSTED_ISATTY:
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check_err(env, isatty(ARG(0)));
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break;
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case HOSTED_SYSTEM:
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/* Assume name is NULL terminated. */
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check_err(env, system((char *)ARG(0)));
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break;
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default:
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cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
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}
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}
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