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