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# syscall.c

Go to the documentation of this file.

    00001 /*****************************************************************************************
    00002  Copyright (c) 2002-2004 The UbixOS Project
    00003  All rights reserved.
    00004
    00005  Redistribution and use in source and binary forms, with or without modification, are
    00006  permitted provided that the following conditions are met:
    00007
    00008  Redistributions of source code must retain the above copyright notice, this list of
    00009  conditions, the following disclaimer and the list of authors.  Redistributions in binary
    00010  form must reproduce the above copyright notice, this list of conditions, the following
    00011  disclaimer and the list of authors in the documentation and/or other materials provided
    00012  with the distribution. Neither the name of the UbixOS Project nor the names of its
    00013  contributors may be used to endorse or promote products derived from this software
    00014  without specific prior written permission.
    00015
    00016  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
    00017  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
    00018  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
    00019  THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    00020  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
    00021  OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    00022  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
    00023  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    00024  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    00025
    00026  $Id: syscall_8c-source.html 88 2016-01-12 00:11:29Z reddawg $
    00027
    00028 *****************************************************************************************/
    00029
    00030 #include <ubixos/syscall.h>
    00031 #include <ubixos/syscalls.h>
    00032 #include <ubixos/sched.h>
    00033 #include <ubixos/types.h>
    00034 #include <ubixos/exec.h>
    00035 #include <ubixos/elf.h>
    00036 #include <ubixos/endtask.h>
    00037 #include <ubixos/time.h>
    00038 #include <sys/video.h>
    00039 #include <sys/trap.h>
    00040 #include <vfs/file.h>
    00041 #include <ubixfs/ubixfs.h>
    00042 #include <lib/string.h>
    00043 #include <lib/kprintf.h>
    00044 #include <lib/kmalloc.h>
    00045 #include <ubixos/vitals.h>
    00046 /* #include <sde/sde.h> */
    00047 #include <mpi/mpi.h>
    00048 #include <vmm/vmm.h>
    00049
    00050 long   fuword(const void *base);
    00051
    00052 void sdeTestThread();
    00053
    00054 asm(
    00055   ".globl _sysCallNew           \n"
    00056   "_sysCallNew:                 \n"
    00057   "  pusha                      \n"
    00058   "  push %ss                   \n"
    00059   "  push %ds                   \n"
    00060   "  push %es                   \n"
    00061   "  push %fs                   \n"
    00062   "  push %gs                   \n"
    00063   "  cmpl totalCalls,%eax       \n"
    00064   "  jae  invalidSysCallNew     \n"
    00065   "  mov  %esp,%ebx             \n"
    00066   "  add  $12,%ebx              \n"
    00067   "  push (%ebx)                \n"
    00068   "  call *systemCalls(,%eax,4) \n"
    00069   "  add  $4,%esp               \n"
    00070   "  jmp  doneNew               \n"
    00071   "invalidSysCallNew:           \n"
    00072   "  call InvalidSystemCall     \n"
    00073   "doneNew:                     \n"
    00074   "  pop %gs                    \n"
    00075   "  pop %fs                    \n"
    00076   "  pop %es                    \n"
    00077   "  pop %ds                    \n"
    00078   "  pop %ss                    \n"
    00079   "  popa                       \n"
    00080   "  iret                       \n"
    00081   );
    00082
    00083 void InvalidSystemCall()
    00084 {
    00085         kprintf("attempt was made to an invalid system call\n");
    00086         return;
    00087 }
    00088
    00089 typedef struct _UbixUser UbixUser;
    00090 struct _UbixUser
    00091 {
    00092         char *username;
    00093         char *password;
    00094         int uid;
    00095         int gid;
    00096         char *home;
    00097         char *shell;
    00098 };
    00099
    00100 void sysAuth(UbixUser *uu)
    00101 {
    00102         kprintf("authenticating user %s\n", uu->username);
    00103         if(uu->username == "root" && uu->password == "user")
    00104         {
    00105                 uu->uid = 0;
    00106                 uu->gid = 0;
    00107         }
    00108         uu->uid = -1;
    00109         uu->gid = -1;
    00110         return;
    00111 }
    00112
    00113 void sysPasswd(char *passwd)
    00114 {
    00115         kprintf("changing user password for user %d\n", _current->uid);
    00116         return;
    00117 }
    00118
    00119 void sysAddModule()
    00120 {
    00121         return;
    00122 }
    00123
    00124 void sysRmModule()
    00125 {
    00126         return;
    00127 }
    00128
    00129 void sysGetpid(int *pid)
    00130 {
    00131         if (pid)
    00132                 *pid = _current->id;
    00133                 return;
    00134 }
    00135
    00136 void sysGetUid(int *uid) {
    00137   if (uid)
    00138     *uid = _current->uid;
    00139   return;
    00140   }
    00141
    00142 void sysGetGid(int *gid) {
    00143   if (gid)
    00144     *gid = _current->gid;
    00145   return;
    00146   }
    00147
    00148 void sysSetUid(int uid,int *status) {
    00149   if (_current->uid == 0x0) {
    00150     _current->uid = uid;
    00151     if (status)
    00152       *status = 0x0;
    00153     }
    00154   else {
    00155     if (status)
    00156       *status = 1;
    00157     }
    00158   return;
    00159   }
    00160
    00161 void sysSetGid(int gid,int *status) {
    00162   if (_current->gid == 0x0) {
    00163     _current->gid = gid;
    00164     if (status)
    00165       *status = 0x0;
    00166     }
    00167   else {
    00168     if (status)
    00169       *status = 1;
    00170     }
    00171   return;
    00172   }
    00173
    00174 void sysExit(int status)
    00175 {
    00176         endTask(_current->id);
    00177 }
    00178
    00179 void sysCheckPid(int pid,int *ptr)
    00180 {
    00181         kTask_t *tmpTask = schedFindTask(pid);
    00182         if ((tmpTask != 0x0) && (ptr != 0x0))
    00183                 *ptr = tmpTask->state;
    00184         else
    00185                 *ptr = 0x0;
    00186         return;
    00187 }
    00188
    00189 /************************************************************************
    00190
    00191 Function: void sysGetFreePage();
    00192 Description: Allocs A Page To The Users VM Space
    00193 Notes:
    00194
    00195 ************************************************************************/
    00196 void sysGetFreePage(long *ptr,int count,int type) {
    00197   if (ptr) {
    00198     if (type == 2)
    00199       *ptr = (long) vmmGetFreeVirtualPage(_current->id,count,VM_THRD);
    00200     else
    00201       *ptr = (long) vmmGetFreeVirtualPage(_current->id,count,VM_TASK);
    00202     }
    00203   return;
    00204   }
    00205
    00206 void sysGetDrives(uInt32 *ptr)
    00207 {
    00208         if (ptr)
    00209                 *ptr = 0x0;//(uInt32)devices;
    00210         return;
    00211 }
    00212
    00213 void sysGetUptime(uInt32 *ptr)
    00214 {
    00215         if (ptr)
    00216                 *ptr = systemVitals->sysTicks;
    00217         return;
    00218 }
    00219
    00220 void sysGetTime(uInt32 *ptr)
    00221 {
    00222         if (ptr)
    00223                 *ptr = systemVitals->sysUptime + systemVitals->timeStart;
    00224         return;
    00225 }
    00226
    00227
    00228 void sysGetCwd(char *data,int len)
    00229 {
    00230         if (data)
    00231                 sprintf(data,"%s", _current->oInfo.cwd);
    00232         return;
    00233 }
    00234
    00235 void sysSchedYield() {
    00236   sched_yield();
    00237   }
    00238
    00239 void sysStartSDE() {
    00240   int i = 0x0;
    00241   for (i=0;i<1400;i++) {
    00242     asm("hlt");
    00243     }
    00244   //execThread(sdeThread,(uInt32)(kmalloc(0x2000)+0x2000),0x0);
    00245   for (i=0;i<1400;i++) {
    00246     asm("hlt");
    00247     }
    00248   return;
    00249   }
    00250
    00251 void invalidCall(int sys_call) {
    00252   kprintf("Invalid System Call #[%i]\n",sys_call);
    00253   return;
    00254   }
    00255
    00256 /***
    00257  END
    00258  ***/
    00259