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-rw-r--r--qemu/linux-user/m68k-sim.c171
1 files changed, 171 insertions, 0 deletions
diff --git a/qemu/linux-user/m68k-sim.c b/qemu/linux-user/m68k-sim.c
new file mode 100644
index 000000000..1994e4000
--- /dev/null
+++ b/qemu/linux-user/m68k-sim.c
@@ -0,0 +1,171 @@
+/*
+ * m68k simulator syscall interface
+ *
+ * Copyright (c) 2005 CodeSourcery, LLC. Written by Paul Brook.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+
+#include "qemu.h"
+
+#define SYS_EXIT 1
+#define SYS_READ 3
+#define SYS_WRITE 4
+#define SYS_OPEN 5
+#define SYS_CLOSE 6
+#define SYS_BRK 17
+#define SYS_FSTAT 28
+#define SYS_ISATTY 29
+#define SYS_LSEEK 199
+
+struct m68k_sim_stat {
+ uint16_t sim_st_dev;
+ uint16_t sim_st_ino;
+ uint32_t sim_st_mode;
+ uint16_t sim_st_nlink;
+ uint16_t sim_st_uid;
+ uint16_t sim_st_gid;
+ uint16_t sim_st_rdev;
+ uint32_t sim_st_size;
+ uint32_t sim_st_atime;
+ uint32_t sim_st_mtime;
+ uint32_t sim_st_ctime;
+ uint32_t sim_st_blksize;
+ uint32_t sim_st_blocks;
+};
+
+static inline uint32_t check_err(CPUM68KState *env, uint32_t code)
+{
+ env->dregs[0] = code;
+ if (code == (uint32_t)-1) {
+ env->dregs[1] = errno;
+ } else {
+ env->dregs[1] = 0;
+ }
+ return code;
+}
+
+#define SIM_O_APPEND 0x0008
+#define SIM_O_CREAT 0x0200
+#define SIM_O_TRUNC 0x0400
+#define SIM_O_EXCL 0x0800
+#define SIM_O_NONBLOCK 0x4000
+#define SIM_O_NOCTTY 0x8000
+#define SIM_O_SYNC 0x2000
+
+static int translate_openflags(int flags)
+{
+ int hf;
+
+ switch (flags & 3) {
+ case 0: hf = O_RDONLY; break;
+ case 1: hf = O_WRONLY; break;
+ case 2: hf = O_RDWR; break;
+ default: hf = O_RDWR; break;
+ }
+
+ if (flags & SIM_O_APPEND) hf |= O_APPEND;
+ if (flags & SIM_O_CREAT) hf |= O_CREAT;
+ if (flags & SIM_O_TRUNC) hf |= O_TRUNC;
+ if (flags & SIM_O_EXCL) hf |= O_EXCL;
+ if (flags & SIM_O_NONBLOCK) hf |= O_NONBLOCK;
+ if (flags & SIM_O_NOCTTY) hf |= O_NOCTTY;
+ if (flags & SIM_O_SYNC) hf |= O_SYNC;
+
+ return hf;
+}
+
+#define ARG(x) tswap32(args[x])
+void do_m68k_simcall(CPUM68KState *env, int nr)
+{
+ M68kCPU *cpu = m68k_env_get_cpu(env);
+ uint32_t *args;
+
+ args = (uint32_t *)(unsigned long)(env->aregs[7] + 4);
+ switch (nr) {
+ case SYS_EXIT:
+ exit(ARG(0));
+ case SYS_READ:
+ check_err(env, read(ARG(0), (void *)(unsigned long)ARG(1), ARG(2)));
+ break;
+ case SYS_WRITE:
+ check_err(env, write(ARG(0), (void *)(unsigned long)ARG(1), ARG(2)));
+ break;
+ case SYS_OPEN:
+ check_err(env, open((char *)(unsigned long)ARG(0),
+ translate_openflags(ARG(1)), ARG(2)));
+ break;
+ case SYS_CLOSE:
+ {
+ /* Ignore attempts to close stdin/out/err. */
+ int fd = ARG(0);
+ if (fd > 2)
+ check_err(env, close(fd));
+ else
+ check_err(env, 0);
+ break;
+ }
+ case SYS_BRK:
+ {
+ int32_t ret;
+
+ ret = do_brk((abi_ulong)ARG(0));
+ if (ret == -ENOMEM)
+ ret = -1;
+ check_err(env, ret);
+ }
+ break;
+ case SYS_FSTAT:
+ {
+ struct stat s;
+ int rc;
+ struct m68k_sim_stat *p;
+ rc = check_err(env, fstat(ARG(0), &s));
+ if (rc == 0) {
+ p = (struct m68k_sim_stat *)(unsigned long)ARG(1);
+ p->sim_st_dev = tswap16(s.st_dev);
+ p->sim_st_ino = tswap16(s.st_ino);
+ p->sim_st_mode = tswap32(s.st_mode);
+ p->sim_st_nlink = tswap16(s.st_nlink);
+ p->sim_st_uid = tswap16(s.st_uid);
+ p->sim_st_gid = tswap16(s.st_gid);
+ p->sim_st_rdev = tswap16(s.st_rdev);
+ p->sim_st_size = tswap32(s.st_size);
+ p->sim_st_atime = tswap32(s.st_atime);
+ p->sim_st_mtime = tswap32(s.st_mtime);
+ p->sim_st_ctime = tswap32(s.st_ctime);
+ p->sim_st_blksize = tswap32(s.st_blksize);
+ p->sim_st_blocks = tswap32(s.st_blocks);
+ }
+ }
+ break;
+ case SYS_ISATTY:
+ check_err(env, isatty(ARG(0)));
+ break;
+ case SYS_LSEEK:
+ check_err(env, lseek(ARG(0), (int32_t)ARG(1), ARG(2)));
+ break;
+ default:
+ cpu_abort(CPU(cpu), "Unsupported m68k sim syscall %d\n", nr);
+ }
+}