WebSVN – HelenOS – Diff – /branches/dynload/uspace/srv/loader/main.c

 /*
  * Copyright (c) 2008 Jiri Svoboda
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
+ *
  * - Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  * - 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.
  * - 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.
  */
 /** @addtogroup loader
  * @brief   Loads and runs programs from VFS.
  * @{
  */
 /**
  * @file
  * @brief   Loads and runs programs from VFS.
+ *
  * The program loader is a special init binary. Its image is used
  * to create a new task upon a @c task_spawn syscall. The syscall
  * returns the id of a phone connected to the newly created task.
+ *
  * The caller uses this phone to send the pathname and various other
  * information to the loader. This is normally done by the C library
  * and completely hidden from applications.
  */
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/types.h>
 #include <ipc/ipc.h>
+#include <ipc/loader.h>
 #include <errno.h>
+#include <async.h>
 #include <as.h>
 #include <elf.h>
 #include <elf_load.h>
 #include <pcb.h>
 /**
  * Bias used for loading the dynamic linker. This will be soon replaced
  * by automatic placement.
  */
 #define RTLD_BIAS 0x80000
 /** Pathname of the file that will be loaded */
 static char *pathname = NULL;
 /** Receive a call setting pathname of the program to execute.
+ *
  * @param rid
  * @param request
  */
-void iloader_set_pathname(ipc_callid_t rid, ipc_call_t *request)
+static void iloader_set_pathname(ipc_callid_t rid, ipc_call_t *request)
+{
-//  ipc_callid_t callid;
+    ipc_callid_t callid;
     size_t len;
     char *name_buf;
-/*  printf("iloader_set_pathname\n");
+    printf("iloader_set_pathname\n");
     if (!ipc_data_write_receive(&callid, &len)) {
         ipc_answer_0(callid, EINVAL);
         ipc_answer_0(rid, EINVAL);
         return;
+    }
-*/
-    len = IPC_GET_ARG2(*request);
     printf("alloc %d bytes\n", len+1);
     name_buf = malloc(len + 1);
     if (!name_buf) {
-//      ipc_answer_0(callid, ENOMEM);
+        ipc_answer_0(callid, ENOMEM);
         ipc_answer_0(rid, ENOMEM);
         return;
+    }
     printf("write_finalize\n");
-    ipc_data_write_finalize(rid, name_buf, len);
+    ipc_data_write_finalize(callid, name_buf, len);
+    printf("answer\n");
-//  ipc_answer_0(rid, EOK);
+    ipc_answer_0(rid, EOK);
     if (pathname != NULL) {
         free(pathname);
         pathname = NULL;
+    }
+    name_buf[len] = '\0';
     pathname = name_buf;
+}
 /** Load and run the previously selected program.
+ *
  * @param rid
  * @param request
  * @return 0 on success, !0 on error.
  */
-int iloader_run(ipc_callid_t rid, ipc_call_t *request)
+static int iloader_run(ipc_callid_t rid, ipc_call_t *request)
+{
     int rc;
     pcb_t *pcb;
     elf_info_t prog_info;
     elf_info_t interp_info;
     printf("Load program '%s'\n", pathname);
     rc = elf_load_file(pathname, 0, &prog_info);
     if (rc < 0) {
         printf("failed to load program\n");
         return 1;
+    }
     printf("Create PCB\n");
     if (elf_create_pcb(&prog_info) < 0) return 1;
     if (prog_info.interp == NULL) {
         /* Statically linked program */
         printf("Run statically linked program\n");
         elf_run(&prog_info);
         return 0;
+    }
     printf("Load dynamic linker '%s'\n", prog_info.interp);
     rc = elf_load_file("/rtld.so", RTLD_BIAS, &interp_info);
     if (rc < 0) {
         printf("failed to load dynamic linker\n");
         return 1;
+    }
     /*
      * Provide dynamic linker with some useful data
      */
     pcb = (pcb_t *)PCB_ADDRESS;
     pcb->rtld_dynamic = interp_info.dynamic;
     pcb->rtld_bias = RTLD_BIAS;
     printf("run dynamic linker\n");
     elf_run(&interp_info);
     return 0;
+}
-/** Program loader main function.
+/** Handle loader connection.
+ *
  * Receive and carry out commands (of which the last one should be
  * to execute the loaded program).
  */
-int main(int argc, char *argv[])
+static void loader_connection(ipc_callid_t iid, ipc_call_t *icall)
+{
     ipc_callid_t callid;
     ipc_call_t call;
     int retval;
+    /* Ignore parameters, the connection is already open */
-    int len;
+    (void)iid; (void)icall;
     while (1) {
-        callid = ipc_wait_for_call(&call);
+        callid = async_get_call(&call);
+        printf("received call from phone %d, method=%d\n",
-        printf("received call, method=%d\n", IPC_GET_METHOD(call));
+            call.in_phone_hash, IPC_GET_METHOD(call));
         switch (IPC_GET_METHOD(call)) {
-        case IPC_M_DATA_WRITE:
+        case LOADER_SET_PATHNAME:
             iloader_set_pathname(callid, &call);
+            continue;
+        case LOADER_RUN:
             iloader_run(callid, &call);
             exit(0);
             continue;
         default:
             retval = ENOENT;
             break;
+        }
         if ((callid & IPC_CALLID_NOTIFICATION) == 0) {
             printf("responding EINVAL to method %d\n", IPC_GET_METHOD(call));
             ipc_answer_0(callid, EINVAL);
+        }
+    }
+}
+/** Program loader main function.
+ */
+int main(int argc, char *argv[])
+{
+    ipc_callid_t callid;
+    ipc_call_t call;
+    ipcarg_t phone_hash;
+    /* The first call only communicates the incoming phone hash */
+    callid = ipc_wait_for_call(&call);
+    if (IPC_GET_METHOD(call) != LOADER_HELLO) {
+        if (IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP)
+            ipc_answer_0(callid, EINVAL);
+        return 1;
+    }
+    ipc_answer_0(callid, EOK);
+    phone_hash = call.in_phone_hash;
+    /*
+     * FIXME: up until now no async calls can be used!!!
+     * (Which means e.g. printf() cannot be used)
+     */
+    async_new_connection(phone_hash, 0, NULL, loader_connection);
+    async_manager();
     /* not reached */
     return 0;
+}
 /** @}
  */

Subversion Repositories HelenOS

(root)/branches/dynload/uspace/srv/loader/main.c @ 3773 – Rev 3101 → 3148