4f294c247f
This patch mainly copies and modifies files existing in the current libc implementing minix specific functions. To keep consisten with the NetBSD libc, we remove namespace stubs and we use "namespace.h" and weak links.
66 lines
1 KiB
C
66 lines
1 KiB
C
#define _SYSTEM 1
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#define _MINIX 1
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#include <sys/cdefs.h>
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#include <lib.h>
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#include "namespace.h"
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#include <minix/rs.h>
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#include <lib.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <stdlib.h>
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#include <errno.h>
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#ifdef __weak_alias
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__weak_alias(shmat, _shmat)
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__weak_alias(shmdt, _shmdt)
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#endif
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static int get_ipc_endpt(endpoint_t *pt)
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{
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return minix_rs_lookup("ipc", pt);
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}
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/* Attach shared memory segment. */
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void *shmat(int shmid, const void *shmaddr, int shmflg)
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{
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message m;
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endpoint_t ipc_pt;
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int r;
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if (get_ipc_endpt(&ipc_pt) != OK) {
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errno = ENOSYS;
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return NULL;
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}
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m.SHMAT_ID = shmid;
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m.SHMAT_ADDR = (long) shmaddr;
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m.SHMAT_FLAG = shmflg;
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r = _syscall(ipc_pt, IPC_SHMAT, &m);
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if (r != OK)
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return (void *) -1;
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return (void *) m.SHMAT_RETADDR;
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}
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/* Deattach shared memory segment. */
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int shmdt(const void *shmaddr)
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{
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message m;
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endpoint_t ipc_pt;
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if (get_ipc_endpt(&ipc_pt) != OK) {
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errno = ENOSYS;
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return -1;
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}
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m.SHMDT_ADDR = (long) shmaddr;
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return _syscall(ipc_pt, IPC_SHMDT, &m);
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}
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