73 lines
2 KiB
C
73 lines
2 KiB
C
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#include "syslib.h"
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#include <minix/safecopies.h>
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/*===========================================================================*
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* sys_safemap *
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*===========================================================================*/
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PUBLIC int sys_safemap(endpoint_t grantor, cp_grant_id_t grant,
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vir_bytes grant_offset, vir_bytes my_address,
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size_t bytes, int my_seg, int writable)
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{
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/* Map a block of data for which the other process has previously
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* granted permission.
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*/
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message copy_mess;
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copy_mess.SMAP_EP = grantor;
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copy_mess.SMAP_GID = grant;
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copy_mess.SMAP_OFFSET = grant_offset;
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copy_mess.SMAP_SEG = (void*) my_seg;
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copy_mess.SMAP_ADDRESS = my_address;
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copy_mess.SMAP_BYTES = bytes;
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copy_mess.SMAP_FLAG = writable;
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return(_kernel_call(SYS_SAFEMAP, ©_mess));
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}
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/*===========================================================================*
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* sys_saferevmap_gid *
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*===========================================================================*/
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PUBLIC int sys_saferevmap_gid(cp_grant_id_t grant)
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{
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/* Grantor revokes safemap by grant id. */
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message copy_mess;
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copy_mess.SMAP_FLAG = 1;
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copy_mess.SMAP_GID = grant;
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return(_kernel_call(SYS_SAFEREVMAP, ©_mess));
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}
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/*===========================================================================*
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* sys_saferevmap_addr *
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*===========================================================================*/
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PUBLIC int sys_saferevmap_addr(vir_bytes addr)
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{
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/* Grantor revokes safemap by address. */
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message copy_mess;
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copy_mess.SMAP_FLAG = 0;
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copy_mess.SMAP_GID = addr;
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return(_kernel_call(SYS_SAFEREVMAP, ©_mess));
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}
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/*===========================================================================*
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* sys_safeunmap *
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*===========================================================================*/
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PUBLIC int sys_safeunmap(int my_seg, vir_bytes my_address)
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{
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/* Requestor unmaps safemap. */
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message copy_mess;
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copy_mess.SMAP_SEG = (void*) my_seg;
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copy_mess.SMAP_ADDRESS = my_address;
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return(_kernel_call(SYS_SAFEUNMAP, ©_mess));
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}
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