3 files changed, 384 insertions, 0 deletions

diff --git a/sys/alpha/linux/Makefile b/sys/alpha/linux/Makefile
new file mode 100644
index 000000000000..bd6b32a7d4a8
--- /dev/null
+++ b/sys/alpha/linux/Makefile
@@ -0,0 +1,15 @@
+# Makefile for syscall tables
+#
+# $FreeBSD$
+
+all:
+	@echo "make sysent only"
+
+sysent:  linux_sysent.c linux_syscall.h linux_proto.h
+
+linux_sysent.c linux_syscall.h linux_proto.h: ../../kern/makesyscalls.sh \
+		syscalls.master syscalls.conf
+	-mv -f linux_sysent.c linux_sysent.c.bak
+	-mv -f linux_syscall.h linux_syscall.h.bak
+	-mv -f linux_proto.h linux_proto.h.bak
+	sh ../../kern/makesyscalls.sh syscalls.master syscalls.conf
diff --git a/sys/alpha/linux/linux_genassym.c b/sys/alpha/linux/linux_genassym.c
new file mode 100644
index 000000000000..d66e6f256e2b
--- /dev/null
+++ b/sys/alpha/linux/linux_genassym.c
@@ -0,0 +1,13 @@
+/* $FreeBSD$ */
+
+#include <stddef.h>
+
+#include <sys/param.h>
+#include <sys/assym.h>
+
+#include <alpha/linux/linux.h>
+
+ASSYM(LINUX_SIGF_HANDLER, offsetof(struct linux_sigframe, sf_handler));
+ASSYM(LINUX_SIGF_SC, offsetof(struct linux_sigframe, sf_sc));
+/* ASSYM(LINUX_SC_GS, offsetof(struct linux_sigcontext, sc_gs)); */
+/* ASSYM(LINUX_SC_EFLAGS, offsetof(struct linux_sigcontext, sc_eflags)); */
diff --git a/sys/alpha/linux/linux_machdep.c b/sys/alpha/linux/linux_machdep.c
new file mode 100644
index 000000000000..fc8f96fcc308
--- /dev/null
+++ b/sys/alpha/linux/linux_machdep.c
@@ -0,0 +1,356 @@
+/*-
+ * Copyright (c) 2000 Marcel Moolenaar
+ * 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 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/mount.h>
+#include <sys/sysproto.h>
+#include <sys/systm.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_map.h>
+
+#include <sys/proc.h>
+#include <sys/user.h>
+
+#include <alpha/linux/linux.h>
+#include <linux_proto.h>
+#include <compat/linux/linux_signal.h>
+#include <compat/linux/linux_util.h>
+
+struct linux_select_argv {
+	int nfds;
+	fd_set *readfds;
+	fd_set *writefds;
+	fd_set *exceptfds;
+	struct timeval *timeout;
+};
+
+int
+linux_execve(struct proc *p, struct linux_execve_args *args)
+{
+	struct execve_args bsd;
+	caddr_t sg;
+
+	sg = stackgap_init();
+	CHECKALTEXIST(p, &sg, args->path);
+
+#ifdef DEBUG
+	printf("Linux-emul(%d): execve(%s)\n", 
+	    p->p_pid, args->path);
+#endif
+	bsd.fname = args->path;
+	bsd.argv = args->argp;
+	bsd.envv = args->envp;
+	return (execve(p, &bsd));
+}
+
+int
+linux_fork(struct proc *p, struct linux_fork_args *args)
+{
+	int error;
+
+#ifdef DEBUG
+	printf("Linux-emul(%ld): fork()\n", (long)p->p_pid);
+#endif
+	if ((error = fork(p, (struct fork_args *)args)) != 0)
+		return (error);
+
+	if (p->p_retval[1] == 1)
+		p->p_retval[0] = 0;
+
+	return (0);
+}
+
+int
+linux_vfork(struct proc *p, struct linux_vfork_args *args)
+{
+	int error;
+
+#ifdef DEBUG
+	printf("Linux-emul(%ld): vfork()\n", (long)p->p_pid);
+#endif
+	if ((error = vfork(p, (struct vfork_args *)args)) != 0)
+		return (error);
+	/* Are we the child? */
+	if (p->p_retval[1] == 1)
+		p->p_retval[0] = 0;
+	return (0);
+}
+
+#define	CLONE_VM	0x100
+#define	CLONE_FS	0x200
+#define	CLONE_FILES	0x400
+#define	CLONE_SIGHAND	0x800
+#define	CLONE_PID	0x1000
+
+int
+linux_clone(struct proc *p, struct linux_clone_args *args)
+{
+	return ENOSYS;
+}
+
+#define	STACK_SIZE  (2 * 1024 * 1024)
+#define	GUARD_SIZE  (4 * PAGE_SIZE)
+
+int
+linux_mmap(struct proc *p, struct linux_mmap_args *linux_args)
+{
+	struct mmap_args /* {
+		caddr_t addr;
+		size_t len;
+		int prot;
+		int flags;
+		int fd;
+		long pad;
+		off_t pos;
+	} */ bsd_args;
+	int error;
+
+#ifdef DEBUG
+	printf("Linux-emul(%ld): mmap(%p, 0x%lx, 0x%x, 0x%x, 0x%x, 0x%lx)\n",
+	    (long)p->p_pid, (void *)linux_args->addr, linux_args->len,
+	    linux_args->prot, linux_args->flags, linux_args->fd, linux_args->pos);
+#endif
+	bsd_args.prot = linux_args->prot | PROT_READ;	/* always required */
+
+	bsd_args.flags = 0;
+	if (linux_args->flags & LINUX_MAP_SHARED)
+		bsd_args.flags |= MAP_SHARED;
+	if (linux_args->flags & LINUX_MAP_PRIVATE)
+		bsd_args.flags |= MAP_PRIVATE;
+	if (linux_args->flags & LINUX_MAP_FIXED){
+		bsd_args.flags |= MAP_FIXED;
+		bsd_args.pos = trunc_page(linux_args->pos);
+	} else {
+		bsd_args.pos = linux_args->pos;
+	}
+	if (linux_args->flags & LINUX_MAP_ANON)
+		bsd_args.flags |= MAP_ANON;
+	if (linux_args->flags & LINUX_MAP_GROWSDOWN) {
+		bsd_args.flags |= MAP_STACK;
+
+		/* The linux MAP_GROWSDOWN option does not limit auto
+		 * growth of the region.  Linux mmap with this option
+		 * takes as addr the inital BOS, and as len, the initial
+		 * region size.  It can then grow down from addr without
+		 * limit.  However, linux threads has an implicit internal
+		 * limit to stack size of STACK_SIZE.  Its just not
+		 * enforced explicitly in linux.  But, here we impose
+		 * a limit of (STACK_SIZE - GUARD_SIZE) on the stack
+		 * region, since we can do this with our mmap.
+		 *
+		 * Our mmap with MAP_STACK takes addr as the maximum
+		 * downsize limit on BOS, and as len the max size of
+		 * the region.  It them maps the top SGROWSIZ bytes,
+		 * and autgrows the region down, up to the limit
+		 * in addr.
+		 *
+		 * If we don't use the MAP_STACK option, the effect
+		 * of this code is to allocate a stack region of a
+		 * fixed size of (STACK_SIZE - GUARD_SIZE).
+		 */
+
+		/* This gives us TOS */
+		bsd_args.addr = linux_args->addr + linux_args->len;
+
+		/* This gives us our maximum stack size */
+		if (linux_args->len > STACK_SIZE - GUARD_SIZE)
+			bsd_args.len = linux_args->len;
+		else
+			bsd_args.len  = STACK_SIZE - GUARD_SIZE;
+
+		/* This gives us a new BOS.  If we're using VM_STACK, then
+		 * mmap will just map the top SGROWSIZ bytes, and let
+		 * the stack grow down to the limit at BOS.  If we're
+		 * not using VM_STACK we map the full stack, since we
+		 * don't have a way to autogrow it.
+		 */
+		bsd_args.addr -= bsd_args.len;
+		bsd_args.addr = (caddr_t)round_page(bsd_args.addr); /* XXXX */
+	} else {
+		bsd_args.addr = linux_args->addr;
+		bsd_args.len  = linux_args->len;
+	}
+
+	bsd_args.fd = linux_args->fd;
+	if(linux_args->fd == 0)
+		bsd_args.fd = -1;
+
+	bsd_args.pad = 0;
+#ifdef DEBUG
+	printf("Linux-emul(%ld): mmap(%p, 0x%lx, 0x%x, 0x%x, 0x%x, 0x%lx)\n",
+	    (long)p->p_pid,
+	    (void *)bsd_args.addr,
+	    bsd_args.len,
+	    bsd_args.prot,
+	    bsd_args.flags,
+	    bsd_args.fd,
+	    bsd_args.pos);
+#endif
+	if (bsd_args.addr == 0)
+		bsd_args.addr = (caddr_t)0x40000000UL;
+	error = mmap(p, &bsd_args);
+#ifdef DEBUG
+	printf("Linux-emul(%ld): mmap returns %d, 0x%lx\n",
+	    (long)p->p_pid, error,  p->p_retval[0]);
+#endif
+	return (error);
+}
+
+int
+linux_rt_sigsuspend(p, uap)
+	struct proc *p;
+	struct linux_rt_sigsuspend_args *uap;
+{
+	int error;
+	linux_sigset_t lmask;
+	sigset_t *bmask;
+	struct sigsuspend_args bsd;
+	caddr_t sg;
+
+	sg = stackgap_init();
+
+#ifdef DEBUG
+	printf("Linux-emul(%ld): rt_sigsuspend(%p, %d)\n", (long)p->p_pid,
+	    (void *)uap->newset, uap->sigsetsize);
+#endif
+	if (uap->sigsetsize != sizeof(linux_sigset_t))
+		return (EINVAL);
+
+	error = copyin(uap->newset, &lmask, sizeof(linux_sigset_t));
+	if (error)
+		return (error);
+
+	bmask = stackgap_alloc(&sg, sizeof(sigset_t));
+	linux_to_bsd_sigset(&lmask, bmask);
+	bsd.sigmask = bmask;
+	return (sigsuspend(p, &bsd));
+}
+
+int
+linux_mprotect(p, uap)
+	struct proc *p;
+	struct linux_mprotect_args *uap;
+{
+
+#ifdef DEBUG
+	printf("Linux-emul(%ld): mprotect(%p, 0x%lx, 0x%x)\n",
+	    (long)p->p_pid, (void *)uap->addr, uap->len, uap->prot);
+#endif
+	return (mprotect(p, (void *)uap));
+}
+
+int
+linux_munmap(p, uap)
+	struct proc *p;
+	struct linux_munmap_args *uap;
+{
+
+#ifdef DEBUG
+	printf("Linux-emul(%ld): munmap(%p, 0x%lx)\n",
+	    (long)p->p_pid, (void *)uap->addr, uap->len);
+#endif
+	return (munmap(p, (void *)uap));
+}
+
+/*
+ * linux/alpha has 2 mappings for this,
+ * This is here purely to shut the compiler up.
+ */
+
+int
+linux_setpgid(p, uap)
+	struct proc *p;
+	struct linux_setpgid_args *uap;
+{
+
+	return (setpgid(p, (void *)uap));
+}
+
+
+static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
+	RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
+	RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NOFILE, -1,
+	RLIMIT_NPROC, RLIMIT_MEMLOCK
+};
+
+int dosetrlimit __P((struct proc *p, u_int which, struct rlimit *limp));
+
+int
+linux_setrlimit(p, uap)
+	struct proc *p;
+	struct linux_setrlimit_args *uap;
+{
+	struct rlimit rlim;
+	u_int which;
+	int error;
+
+#ifdef DEBUG
+	printf("Linux-emul(%ld): setrlimit(%d, %p)\n",
+	   (long)p->p_pid, uap->resource, (void *)uap->rlim);
+#endif
+	if (uap->resource >= LINUX_RLIM_NLIMITS)
+		return EINVAL;
+
+	which = linux_to_bsd_resource[uap->resource];
+
+	if (which == -1)
+		return EINVAL;
+
+	if ((error =
+	   copyin((caddr_t)uap->rlim, (caddr_t)&rlim, sizeof (struct rlimit))))
+		return (error);
+	return dosetrlimit(p,  which, &rlim);
+}
+
+int
+linux_getrlimit(p, uap)
+	struct proc *p;
+	struct linux_getrlimit_args *uap;
+{
+	u_int which;
+
+#ifdef DEBUG
+	printf("Linux-emul(%ld): getrlimit(%d, %p)\n",
+	   (long)p->p_pid, uap->resource, (void *)uap->rlim);
+#endif
+	if (uap->resource >= LINUX_RLIM_NLIMITS)
+		return EINVAL;
+
+	which = linux_to_bsd_resource[uap->resource];
+
+	if (which == -1)
+		return EINVAL;
+
+	return (copyout((caddr_t)&p->p_rlimit[which], (caddr_t)uap->rlim,
+	    sizeof (struct rlimit)));
+}