minix/kernel/system/do_abort.c

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/* The kernel call implemented in this file:
* m_type: SYS_ABORT
*
* The parameters for this kernel call are:
* m1_i1: ABRT_HOW (how to abort, possibly fetch monitor params)
* m1_i2: ABRT_MON_ENDPT (proc nr to get monitor params from)
* m1_i3: ABRT_MON_LEN (length of monitor params)
* m1_p1: ABRT_MON_ADDR (virtual address of params)
*/
#include "../system.h"
#include <unistd.h>
#if USE_ABORT
/*===========================================================================*
* do_abort *
*===========================================================================*/
PUBLIC int do_abort(m_ptr)
message *m_ptr; /* pointer to request message */
{
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/* Handle sys_abort. MINIX is unable to continue. This can originate e.g.
* in the PM (normal abort or panic) or TTY (after CTRL-ALT-DEL).
*/
int how = m_ptr->ABRT_HOW;
int length;
phys_bytes src_phys;
/* See if the monitor is to run the specified instructions. */
if (how == RBT_MONITOR) {
int p;
static char paramsbuffer[512];
int len;
len = MIN(m_ptr->ABRT_MON_LEN, sizeof(paramsbuffer)-1);
if((p=data_copy(m_ptr->ABRT_MON_ENDPT, (vir_bytes) m_ptr->ABRT_MON_ADDR,
SYSTEM, (vir_bytes) paramsbuffer, len)) != OK) {
return p;
}
paramsbuffer[len] = '\0';
/* Parameters seem ok, copy them and prepare shutting down. */
if((p = arch_set_params(paramsbuffer, len+1)) != OK)
return p;
}
/* Now prepare to shutdown MINIX. */
prepare_shutdown(how);
return(OK); /* pro-forma (really EDISASTER) */
}
#endif /* USE_ABORT */