syscall_new.c

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/*****************************************************************************************
 Copyright (c) 2002-2004 The UbixOS Project
 All rights reserved.

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 without specific prior written permission.

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 $Id: syscall__new_8c-source.html 88 2016-01-12 00:11:29Z reddawg $

*****************************************************************************************/

#include <ubixos/syscalls_new.h>
#include <ubixos/sched.h>
#include <ubixos/types.h>
#include <ubixos/endtask.h>
#include <ubixos/spinlock.h>
#include <sys/trap.h>
#include <lib/string.h>
#include <lib/kprintf.h>

spinLock_t Master = SPIN_LOCK_INITIALIZER;

void syscall(struct trapframe frame) {
  uInt32 code = 0x0;
  caddr_t params;
  struct thread *td = &_current->td;
  int args[8];
  int error = 0x0;

  params = (caddr_t)frame.tf_esp + sizeof(int);
 
  code = frame.tf_eax;
  if (code == 198) {
    memcpy(&code,params,sizeof(int));
    params += sizeof(quad_t);
    }

  if (code > totalCalls_new) {
    kprintf("Invalid Call: [%i]\n",frame.tf_eax);
    }
  else if ((uInt32)systemCalls_new[code] == 0x0) {
    kprintf("Invalid Call: [%i][0x%X]\n",code,(uInt32)systemCalls_new[code]);
    frame.tf_eax = -1;
    frame.tf_edx = 0x0;
    }
  else {
    memcpy(args,params,8 * sizeof(int));
    td->td_retval[0] = 0;
    td->td_retval[1] = frame.tf_edx;

    error = (int)systemCalls_new[code](td,args);
    switch (error) {
      case 0:
        frame.tf_eax = td->td_retval[0];
        frame.tf_edx = td->td_retval[1];
        frame.tf_eflags &= ~PSL_C;
        break;
      case ERESTART:
        frame.tf_eip -= frame.tf_err;
        break;
      case EJUSTRETURN:
        break;
      default:
        frame.tf_eax = error;
        frame.tf_eflags |= PSL_C;
        break;

      }
    }
  }


/***
 END
 ***/

---