New COMPAT_BSDOS framework. Needs a lot more work (syscalls missing,

syscall differences missing, machine dependant), but is still worth switching
to because it offers /emul support and shows up as a `real' emulation.

1 files changed, 144 insertions, 0 deletions

diff --git a/sys/compat/bsdos/bsdos_exec.c b/sys/compat/bsdos/bsdos_exec.c
new file mode 100644
index 00000000000..6e3bf9019c1
--- /dev/null
+++ b/sys/compat/bsdos/bsdos_exec.c
@@ -0,0 +1,144 @@
+/*	$OpenBSD: bsdos_exec.c,v 1.1 1997/09/02 08:54:12 downsj Exp $	*/
+
+/*
+ * Copyright (c) 1993, 1994 Christopher G. Demetriou
+ * 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.
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Christopher G. Demetriou.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without 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.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/malloc.h>
+#include <sys/vnode.h>
+#include <sys/exec.h>
+#include <sys/resourcevar.h>
+#include <vm/vm.h>
+
+#if 0
+#include <machine/bsdos_machdep.h>
+#endif
+
+#include <compat/bsdos/bsdos_exec.h>
+#include <compat/bsdos/bsdos_syscall.h>
+
+extern struct sysent bsdos_sysent[];
+extern char *bsdos_syscallnames[];
+
+extern void sendsig __P((sig_t, int, int, u_long, int, union sigval));
+extern char sigcode[], esigcode[];
+
+struct emul emul_bsdos = {
+	"bsdos",
+	NULL,
+	sendsig,
+	BSDOS_SYS_syscall,
+	BSDOS_SYS_MAXSYSCALL,
+	bsdos_sysent,
+	bsdos_syscallnames,
+	0,
+	copyargs,
+	setregs,
+	NULL,
+	sigcode,
+	esigcode,
+};
+
+/*
+ * exec_aout_makecmds(): Check if it's an a.out-format executable.
+ *
+ * Given a proc pointer and an exec package pointer, see if the referent
+ * of the epp is in a.out format.  First check 'standard' magic numbers for
+ * this architecture.  If that fails, try a cpu-dependent hook.
+ *
+ * This function, in the former case, or the hook, in the latter, is
+ * responsible for creating a set of vmcmds which can be used to build
+ * the process's vm space and inserting them into the exec package.
+ */
+
+int
+exec_bsdos_aout_makecmds(p, epp)
+	struct proc *p;
+	struct exec_package *epp;
+{
+	u_long midmag, magic;
+	u_short mid;
+	int error = ENOEXEC;
+	struct exec *execp = epp->ep_hdr;
+
+	if (epp->ep_hdrvalid < sizeof(struct exec))
+		return ENOEXEC;
+
+	midmag = ntohl(execp->a_midmag);
+	mid = (midmag >> 16) & 0xffff;
+	magic = midmag & 0xffff;
+
+	if (magic == 0) {
+		magic = (execp->a_midmag & 0xffff);
+		mid = MID_BSDOS;
+	}
+
+	midmag = mid << 16 | magic;
+
+	switch (midmag) {
+	case (MID_BSDOS << 16) | ZMAGIC:
+		/*
+		 * 386BSD's ZMAGIC format:
+		 */
+		error = exec_aout_prep_oldzmagic(p, epp);
+		break;
+	case (MID_BSDOS << 16) | QMAGIC:
+		/*
+		 * BSDI's QMAGIC format:
+		 * same as new ZMAGIC format, but with different magic number.
+		 */
+		error = exec_aout_prep_zmagic(p, epp);
+		break;
+	case (MID_BSDOS << 16) | NMAGIC:
+		/*
+		 * BSDI's NMAGIC format:
+		 * same as NMAGIC format, but with different magic number
+		 * and with text starting at 0.
+		 */
+		error = exec_aout_prep_oldnmagic(p, epp);
+		break;
+	case (MID_BSDOS << 16) | OMAGIC:
+		/*
+		 * BSDI's OMAGIC format:
+		 * same as OMAGIC format, but with different magic number
+		 * and with text starting at 0.
+		 */
+		error = exec_aout_prep_oldomagic(p, epp);
+		break;
+	}
+	if (error == 0)
+		epp->ep_emul = &emul_bsdos;
+	else
+		kill_vmcmds(&epp->ep_vmcmds);
+
+	return error;
+}