0946d128cd
- Moved generic_handler() from system.c to system/do_irqctl.c. - Set privileges of system processes somewhat stricter.
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* The system call implemented in this file:
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* m_type: SYS_ABORT
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*
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* The parameters for this system call are:
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* m1_i1: ABRT_HOW (how to abort, possibly fetch monitor params)
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* m1_i2: ABRT_MON_PROC (proc nr to get monitor params from)
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* m1_i3: ABRT_MON_LEN (length of monitor params)
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* m1_p1: ABRT_MON_ADDR (virtual address of params)
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*/
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#include "../system.h"
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#include <unistd.h>
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#if USE_ABORT
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/*===========================================================================*
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* do_abort *
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*===========================================================================*/
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PUBLIC int do_abort(m_ptr)
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message *m_ptr; /* pointer to request message */
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{
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/* Handle sys_abort. MINIX is unable to continue. This can originate in the
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* PM (normal abort or panic) or FS (panic), or TTY (after CTRL-ALT-DEL).
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*/
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int how = m_ptr->ABRT_HOW;
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int proc_nr;
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int length;
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phys_bytes src_phys;
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/* See if the monitor is to run the specified instructions. */
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if (how == RBT_MONITOR) {
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proc_nr = m_ptr->ABRT_MON_PROC;
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if (! isokprocn(proc_nr)) return(EINVAL);
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length = m_ptr->ABRT_MON_LEN + 1;
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if (length > kinfo.params_size) return(E2BIG);
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src_phys = numap_local(proc_nr,(vir_bytes)m_ptr->ABRT_MON_ADDR,length);
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if (! src_phys) return(EFAULT);
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/* Parameters seem ok, copy them and prepare shutting down. */
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phys_copy(src_phys, kinfo.params_base, (phys_bytes) length);
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}
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/* Now prepare to shutdown MINIX. */
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prepare_shutdown(how);
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return(OK); /* pro-forma (really EDISASTER) */
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}
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#endif /* USE_ABORT */
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