First incarnation of our Linux emulator or rather compatibility code.

This first shot only incorporaties so much functionality that DOOM
can run (the X version), signal handling is VERY weak, so is many
other things. But it meets my milestone number one (you guessed it
- running DOOM).

Uses /compat/linux as prefix for loading shared libs, so it won't
conflict with our own libs.

Kernel must be compiled with "options COMPAT_LINUX" for this to work.

1 files changed, 308 insertions, 0 deletions

diff --git a/sys/compat/linux/linux_ipc.c b/sys/compat/linux/linux_ipc.c
new file mode 100644
index 0000000..b38b229
--- /dev/null
+++ b/sys/compat/linux/linux_ipc.c
@@ -0,0 +1,308 @@
+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * All rights reserved.
+ *
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ *
+ *  $Id: linux_ipc.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <i386/linux/linux.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/exec.h>
+#include <sys/proc.h>
+#include <sys/sem.h>
+#include <sys/shm.h>
+#include <sys/msg.h>
+
+#include <vm/vm.h>
+
+struct linux_ipc_perm {
+    linux_key_t key;
+    unsigned short uid;
+    unsigned short gid;
+    unsigned short cuid;
+    unsigned short cgid;
+    unsigned short mode;
+    unsigned short seq;
+};
+
+static void
+linux_to_bsd_ipc_perm(struct linux_ipc_perm *lpp, struct ipc_perm *bpp)
+{
+    bpp->key = lpp->key;
+    bpp->uid = lpp->uid;
+    bpp->gid = lpp->gid;
+    bpp->cuid = lpp->cuid;
+    bpp->cgid = lpp->cgid;
+    bpp->mode = lpp->mode;
+    bpp->seq = lpp->seq;
+}
+
+
+static void
+bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct linux_ipc_perm *lpp)
+{
+    lpp->key = bpp->key;
+    lpp->uid = bpp->uid;
+    lpp->gid = bpp->gid;
+    lpp->cuid = bpp->cuid;
+    lpp->cgid = bpp->cgid;
+    lpp->mode = bpp->mode;
+    lpp->seq = bpp->seq;
+}
+
+struct linux_shmid_ds {
+    struct linux_ipc_perm shm_perm;
+    int shm_segsz;
+    linux_time_t shm_atime;
+    linux_time_t shm_dtime;
+    linux_time_t shm_ctime;
+    ushort shm_cpid;
+    ushort shm_lpid;
+    short shm_nattch;
+    ushort private1;
+    void *private2;
+    void *private3;
+};
+
+static void
+linux_to_bsd_shmid_ds(struct linux_shmid_ds *lsp, struct shmid_ds *bsp)
+{
+    linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
+    bsp->shm_segsz = lsp->shm_segsz;
+    bsp->shm_lpid = lsp->shm_lpid;
+    bsp->shm_cpid = lsp->shm_cpid;
+    bsp->shm_nattch = lsp->shm_nattch;
+    bsp->shm_atime = lsp->shm_atime;
+    bsp->shm_dtime = lsp->shm_dtime;
+    bsp->shm_ctime = lsp->shm_ctime;
+    bsp->shm_internal = lsp->private3;	/* this goes (yet) SOS */
+}
+
+static void
+bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct linux_shmid_ds *lsp)
+{
+    bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
+    lsp->shm_segsz = bsp->shm_segsz;
+    lsp->shm_lpid = bsp->shm_lpid;
+    lsp->shm_cpid = bsp->shm_cpid;
+    lsp->shm_nattch = bsp->shm_nattch;
+    lsp->shm_atime = bsp->shm_atime;
+    lsp->shm_dtime = bsp->shm_dtime;
+    lsp->shm_ctime = bsp->shm_ctime;
+    lsp->private3 = bsp->shm_internal;	/* this goes (yet) SOS */
+}
+
+struct linux_ipc_args {
+    int what;
+    int arg1;
+    int arg2;
+    int arg3;
+    caddr_t ptr;
+};
+
+int
+linux_semop(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_semget(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_semctl(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgsnd(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgrcv(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgget(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_msgctl(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    return ENOSYS;
+}
+
+int
+linux_shmat(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmat_args {
+	int shmid;
+	void *shmaddr;
+	int shmflg;
+    } bsd_args;
+    int error;
+
+    bsd_args.shmid = args->arg1;
+    bsd_args.shmaddr = args->ptr;
+    bsd_args.shmflg = args->arg2;
+    if ((error = shmat(p, &bsd_args, retval)))
+	return error;
+    if ((error = copyout(retval, (caddr_t)args->arg3, sizeof(int))))
+	return error;
+    retval[0] = 0;
+    return 0;
+}
+
+int
+linux_shmdt(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmdt_args {
+	void *shmaddr;
+    } bsd_args;
+
+    bsd_args.shmaddr = args->ptr;
+    return shmdt(p, &bsd_args, retval);
+}
+
+int
+linux_shmget(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmget_args {
+	key_t key;
+	int size;
+	int shmflg;
+    } bsd_args;
+
+    bsd_args.key = args->arg1;
+    bsd_args.size = args->arg2;
+    bsd_args.shmflg = args->arg3;
+    return shmget(p, &bsd_args, retval);
+}
+
+int
+linux_shmctl(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    struct shmid_ds bsd_shmid;
+    struct linux_shmid_ds linux_shmid;
+    struct shmctl_args {
+	int shmid;
+	int cmd;
+	struct shmid_ds *buf;
+    } bsd_args;
+    int error;
+
+    switch (args->arg2) {
+    case LINUX_IPC_STAT:
+	bsd_args.shmid = args->arg1;
+	bsd_args.cmd = IPC_STAT;
+	bsd_args.buf = (struct shmid_ds*)ua_alloc_init(sizeof(struct shmid_ds));
+	if ((error = shmctl(p, &bsd_args, retval)))
+	    return error;
+	if ((error = copyin((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf,
+		    	    sizeof(struct shmid_ds))))
+	    return error;
+	bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
+	return copyout((caddr_t)&linux_shmid, args->ptr, sizeof(linux_shmid));
+
+    case LINUX_IPC_SET:
+	if ((error = copyin(args->ptr, (caddr_t)&linux_shmid,
+		    	    sizeof(linux_shmid))))
+	    return error;
+	linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
+	bsd_args.buf = (struct shmid_ds*)ua_alloc_init(sizeof(struct shmid_ds));
+	if ((error = copyout((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf,
+		     	     sizeof(struct shmid_ds))))
+	    return error;
+	bsd_args.shmid = args->arg1;
+	bsd_args.cmd = IPC_SET;
+	return shmctl(p, &bsd_args, retval);
+
+    case LINUX_IPC_RMID:
+	bsd_args.shmid = args->arg1;
+	bsd_args.cmd = IPC_RMID;
+	if ((error = copyin(args->ptr, (caddr_t)&linux_shmid, 
+		    	    sizeof(linux_shmid))))
+	    return error;
+	linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
+	bsd_args.buf = (struct shmid_ds*)ua_alloc_init(sizeof(struct shmid_ds));
+	if ((error = copyout((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf,
+		     	     sizeof(struct shmid_ds))))
+	    return error;
+	return shmctl(p, &bsd_args, retval);
+
+    case LINUX_IPC_INFO:
+    case LINUX_SHM_STAT:
+    case LINUX_SHM_INFO:
+    case LINUX_SHM_LOCK:
+    case LINUX_SHM_UNLOCK:
+    default:
+	uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what);
+	return EINVAL;
+    }
+}
+
+int
+linux_ipc(struct proc *p, struct linux_ipc_args *args, int *retval)
+{
+    switch (args->what) {
+    case LINUX_SEMOP:
+	return linux_semop(p, args, retval);
+    case LINUX_SEMGET:
+	return linux_semget(p, args, retval);
+    case LINUX_SEMCTL:
+	return linux_semctl(p, args, retval);
+    case LINUX_MSGSND:
+	return linux_msgsnd(p, args, retval);
+    case LINUX_MSGRCV:
+	return linux_msgrcv(p, args, retval);
+    case LINUX_MSGGET:
+	return linux_msgget(p, args, retval);
+    case LINUX_MSGCTL:
+	return linux_msgctl(p, args, retval);
+    case LINUX_SHMAT:
+	return linux_shmat(p, args, retval);
+    case LINUX_SHMDT:
+	return linux_shmdt(p, args, retval);
+    case LINUX_SHMGET:
+	return linux_shmget(p, args, retval);
+    case LINUX_SHMCTL:
+	return linux_shmctl(p, args, retval);
+    default:
+	uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what);
+	return ENOSYS;
+    }
+}