minix/kernel/system/do_memset.c
Jorrit Herder 0946d128cd - Kernel call handlers cleaned up. More strict checking of input parameters.
- Moved generic_handler() from system.c to system/do_irqctl.c.
- Set privileges of system processes somewhat stricter.
2005-07-29 15:26:23 +00:00

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844 B
C

/* The system call implemented in this file:
* m_type: SYS_MEMSET
*
* The parameters for this system call are:
* m2_p1: MEM_PTR (virtual address)
* m2_l1: MEM_COUNT (returns physical address)
* m2_l2: MEM_PATTERN (size of datastructure)
*/
#include "../system.h"
#if USE_MEMSET
/*===========================================================================*
* do_memset *
*===========================================================================*/
PUBLIC int do_memset(m_ptr)
register message *m_ptr;
{
/* Handle sys_memset(). This writes a pattern into the specified memory. */
unsigned long p;
unsigned char c = m_ptr->MEM_PATTERN;
p = c | (c << 8) | (c << 16) | (c << 24);
phys_memset((phys_bytes) m_ptr->MEM_PTR, p, (phys_bytes) m_ptr->MEM_COUNT);
return(OK);
}
#endif /* USE_MEMSET */