do_abort.c

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    1 /* The kernel call implemented in this file:
    2  *   m_type:    SYS_ABORT
    3  *
    4  * The parameters for this kernel call are:
    5  *    m1_i1:    ABRT_HOW        (how to abort, possibly fetch monitor params)   
    6  *    m1_i2:    ABRT_MON_PROC   (proc nr to get monitor params from)    
    7  *    m1_i3:    ABRT_MON_LEN    (length of monitor params)
    8  *    m1_p1:    ABRT_MON_ADDR   (virtual address of params)     
    9  */
   10 
   11 #include "../system.h"
   12 #include <unistd.h>
   13 
   14 #if USE_ABORT
   15 
   16 /*===========================================================================*
   17  *                              do_abort                                     *
   18  *===========================================================================*/
   19 PUBLIC int do_abort(m_ptr)
   20 message *m_ptr;                 /* pointer to request message */
   21 {
   22 /* Handle sys_abort. MINIX is unable to continue. This can originate e.g.
   23  * in the PM (normal abort or panic) or TTY (after CTRL-ALT-DEL).
   24  */
   25   int how = m_ptr->ABRT_HOW;
   26   int proc_nr;
   27   int length;
   28   phys_bytes src_phys;
   29 
   30   /* See if the monitor is to run the specified instructions. */
   31   if (how == RBT_MONITOR) {
   32 
   33       proc_nr = m_ptr->ABRT_MON_PROC;
   34       if (! isokprocn(proc_nr)) return(EINVAL);
   35       length = m_ptr->ABRT_MON_LEN + 1;
   36       if (length > kinfo.params_size) return(E2BIG);
   37       src_phys = numap_local(proc_nr,(vir_bytes)m_ptr->ABRT_MON_ADDR,length);
   38       if (! src_phys) return(EFAULT);
   39 
   40       /* Parameters seem ok, copy them and prepare shutting down. */
   41       phys_copy(src_phys, kinfo.params_base, (phys_bytes) length);
   42   }
   43 
   44   /* Now prepare to shutdown MINIX. */
   45   prepare_shutdown(how);
   46   return(OK);                           /* pro-forma (really EDISASTER) */
   47 }
   48 
   49 #endif /* USE_ABORT */
   50

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FreeBSD/Linux Kernel Cross Reference sys/kernel/system/do_abort.c

FreeBSD/Linux Kernel Cross Reference
sys/kernel/system/do_abort.c