--- /dev/null
+(*
+ * Copyright (C) 2006-2007 XenSource Ltd.
+ * Copyright (C) 2008 Citrix Ltd.
+ * Author Vincent Hanquez <vincent.hanquez@eu.citrix.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file LICENSE.
+ *
+ * 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 Lesser General Public License for more details.
+ *)
+
+type mmap_interface
+
+type mmap_prot_flag = RDONLY | WRONLY | RDWR
+type mmap_map_flag = SHARED | PRIVATE
+
+(* mmap: fd -> prot_flag -> map_flag -> length -> offset -> interface *)
+external mmap: Unix.file_descr -> mmap_prot_flag -> mmap_map_flag
+ -> int -> int -> mmap_interface = "stub_mmap_init"
+external unmap: mmap_interface -> unit = "stub_mmap_final"
+(* read: interface -> start -> length -> data *)
+external read: mmap_interface -> int -> int -> string = "stub_mmap_read"
+(* write: interface -> data -> start -> length -> unit *)
+external write: mmap_interface -> string -> int -> int -> unit = "stub_mmap_write"
+(* getpagesize: unit -> size of page *)
+external getpagesize: unit -> int = "stub_mmap_getpagesize"
--- /dev/null
+(*
+ * Copyright (C) 2006-2007 XenSource Ltd.
+ * Copyright (C) 2008 Citrix Ltd.
+ * Author Vincent Hanquez <vincent.hanquez@eu.citrix.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file LICENSE.
+ *
+ * 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 Lesser General Public License for more details.
+ *)
+
+type mmap_interface
+type mmap_prot_flag = RDONLY | WRONLY | RDWR
+type mmap_map_flag = SHARED | PRIVATE
+
+external mmap : Unix.file_descr -> mmap_prot_flag -> mmap_map_flag -> int -> int
+ -> mmap_interface = "stub_mmap_init"
+external unmap : mmap_interface -> unit = "stub_mmap_final"
+external read : mmap_interface -> int -> int -> string = "stub_mmap_read"
+external write : mmap_interface -> string -> int -> int -> unit
+ = "stub_mmap_write"
+
+external getpagesize : unit -> int = "stub_mmap_getpagesize"
--- /dev/null
+/*
+ * Copyright (C) 2006-2007 XenSource Ltd.
+ * Copyright (C) 2008 Citrix Ltd.
+ * Author Vincent Hanquez <vincent.hanquez@eu.citrix.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file LICENSE.
+ *
+ * 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 Lesser General Public License for more details.
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <string.h>
+#include <errno.h>
+#include "mmap_stubs.h"
+
+#include <caml/mlvalues.h>
+#include <caml/memory.h>
+#include <caml/alloc.h>
+#include <caml/custom.h>
+#include <caml/fail.h>
+#include <caml/callback.h>
+
+#define GET_C_STRUCT(a) ((struct mmap_interface *) a)
+
+static int mmap_interface_init(struct mmap_interface *intf,
+ int fd, int pflag, int mflag,
+ int len, int offset)
+{
+ intf->len = len;
+ intf->addr = mmap(NULL, len, pflag, mflag, fd, offset);
+ return (intf->addr == MAP_FAILED) ? errno : 0;
+}
+
+CAMLprim value stub_mmap_init(value fd, value pflag, value mflag,
+ value len, value offset)
+{
+ CAMLparam5(fd, pflag, mflag, len, offset);
+ CAMLlocal1(result);
+ int c_pflag, c_mflag;
+
+ switch (Int_val(pflag)) {
+ case 0: c_pflag = PROT_READ; break;
+ case 1: c_pflag = PROT_WRITE; break;
+ case 2: c_pflag = PROT_READ|PROT_WRITE; break;
+ default: caml_invalid_argument("protectiontype");
+ }
+
+ switch (Int_val(mflag)) {
+ case 0: c_mflag = MAP_SHARED; break;
+ case 1: c_mflag = MAP_PRIVATE; break;
+ default: caml_invalid_argument("maptype");
+ }
+
+ result = caml_alloc(sizeof(struct mmap_interface), Abstract_tag);
+
+ if (mmap_interface_init(GET_C_STRUCT(result), Int_val(fd),
+ c_pflag, c_mflag,
+ Int_val(len), Int_val(offset)))
+ caml_failwith("mmap");
+ CAMLreturn(result);
+}
+
+CAMLprim value stub_mmap_final(value interface)
+{
+ CAMLparam1(interface);
+ struct mmap_interface *intf;
+
+ intf = GET_C_STRUCT(interface);
+ if (intf->addr != MAP_FAILED)
+ munmap(intf->addr, intf->len);
+ intf->addr = MAP_FAILED;
+
+ CAMLreturn(Val_unit);
+}
+
+CAMLprim value stub_mmap_read(value interface, value start, value len)
+{
+ CAMLparam3(interface, start, len);
+ CAMLlocal1(data);
+ struct mmap_interface *intf;
+ int c_start;
+ int c_len;
+
+ c_start = Int_val(start);
+ c_len = Int_val(len);
+ intf = GET_C_STRUCT(interface);
+
+ if (c_start > intf->len)
+ caml_invalid_argument("start invalid");
+ if (c_start + c_len > intf->len)
+ caml_invalid_argument("len invalid");
+
+ data = caml_alloc_string(c_len);
+ memcpy((char *) data, intf->addr + c_start, c_len);
+
+ CAMLreturn(data);
+}
+
+CAMLprim value stub_mmap_write(value interface, value data,
+ value start, value len)
+{
+ CAMLparam4(interface, data, start, len);
+ struct mmap_interface *intf;
+ int c_start;
+ int c_len;
+
+ c_start = Int_val(start);
+ c_len = Int_val(len);
+ intf = GET_C_STRUCT(interface);
+
+ if (c_start > intf->len)
+ caml_invalid_argument("start invalid");
+ if (c_start + c_len > intf->len)
+ caml_invalid_argument("len invalid");
+
+ memcpy(intf->addr + c_start, (char *) data, c_len);
+
+ CAMLreturn(Val_unit);
+}
+
+CAMLprim value stub_mmap_getpagesize(value unit)
+{
+ CAMLparam1(unit);
+ CAMLlocal1(data);
+
+ data = Val_int(getpagesize());
+ CAMLreturn(data);
+}
--- /dev/null
+/*
+ * Copyright (C) 2006-2007 XenSource Ltd.
+ * Copyright (C) 2008 Citrix Ltd.
+ * Author Vincent Hanquez <vincent.hanquez@eu.citrix.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file LICENSE.
+ *
+ * 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 Lesser General Public License for more details.
+ */
+
+#ifndef C_MMAP_H
+#define C_MMAP_H
+
+#include <caml/mlvalues.h>
+#include <caml/memory.h>
+#include <caml/alloc.h>
+#include <caml/custom.h>
+#include <caml/fail.h>
+#include <caml/callback.h>
+
+struct mmap_interface
+{
+ void *addr;
+ int len;
+};
+
+#endif
projects / xen.git / commitdiff