40f440b8cd
- substituted the use of the m_source message field by caller->p_endpoint in kernel calls. It is the same information, just passed more intuitively. - the last dependency on m_type field is removed. - do_unused() is substituted by a check for NULL. - this pretty much removes the depency of kernel calls on the general message format. In the future this may be used to pass the kcall arguments in a different structure or registers (x86-64, ARM?) The kcall number may be passed in a register already.
44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
/* The kernel call implemented in this file:
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* m_type: SYS_TIMES
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*
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* The parameters for this kernel call are:
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* m4_l1: T_ENDPT (get info for this process)
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* m4_l1: T_USER_TIME (return values ...)
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* m4_l2: T_SYSTEM_TIME
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* m4_l3: T_BOOTTIME
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* m4_l5: T_BOOT_TICKS
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*/
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#include "kernel/system.h"
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#include <minix/endpoint.h>
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#if USE_TIMES
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/*===========================================================================*
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* do_times *
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*===========================================================================*/
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PUBLIC int do_times(struct proc * caller, message * m_ptr)
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{
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/* Handle sys_times(). Retrieve the accounting information. */
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register struct proc *rp;
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int proc_nr, e_proc_nr;
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/* Insert the times needed by the SYS_TIMES kernel call in the message.
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* The clock's interrupt handler may run to update the user or system time
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* while in this code, but that cannot do any harm.
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*/
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e_proc_nr = (m_ptr->T_ENDPT == SELF) ? caller->p_endpoint : m_ptr->T_ENDPT;
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if(e_proc_nr != NONE && isokendpt(e_proc_nr, &proc_nr)) {
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rp = proc_addr(proc_nr);
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m_ptr->T_USER_TIME = rp->p_user_time;
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m_ptr->T_SYSTEM_TIME = rp->p_sys_time;
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}
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m_ptr->T_BOOT_TICKS = get_uptime();
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m_ptr->T_BOOTTIME = boottime;
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return(OK);
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}
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#endif /* USE_TIMES */
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