minix/kernel/system/old/do_abort.c
2005-04-21 14:53:53 +00:00

45 lines
1.4 KiB
C

/* The system call implemented in this file:
* m_type: SYS_ABORT
*
* The parameters for this system call are:
* m1_i1: ABRT_HOW (how to abort, possibly fetch monitor params)
* m1_i2: ABRT_MON_PROC (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 "../kernel.h"
#include "../system.h"
#include <unistd.h>
INIT_ASSERT
/*===========================================================================*
* do_abort *
*===========================================================================*/
PUBLIC int do_abort(m_ptr)
message *m_ptr; /* pointer to request message */
{
/* Handle sys_abort. MINIX is unable to continue. This can originate in the
* MM (normal abort or panic) or FS (panic), or TTY (a CTRL-ALT-DEL or ESC
* after debugging dumps).
*/
register struct proc *rp;
phys_bytes src_phys;
vir_bytes len;
int how = m_ptr->ABRT_HOW;
rp = proc_addr(m_ptr->m_source);
if (how == RBT_MONITOR) {
/* The monitor is to run user specified instructions. */
len = m_ptr->ABRT_MON_LEN + 1;
assert(len <= mon_parmsize);
src_phys = numap_local(m_ptr->ABRT_MON_PROC,
(vir_bytes) m_ptr->ABRT_MON_ADDR, len);
assert(src_phys != 0);
phys_copy(src_phys, mon_params, (phys_bytes) len);
}
prepare_shutdown(how);
return(OK); /* pro-forma (really EDISASTER) */
}