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* sysv_shm.cc (vm_object_reference): remove Cygwin specific define. 

(vm_map_find): Ditto.
	(vm_map_inherit): Ditto.
	(kern_shmat): On Cygwin, take shmaddr just as is.  Don't call vm
	system calls on Cygwin.  Add comment.
This commit is contained in:
Corinna Vinschen 2004-09-21 14:40:24 +00:00
parent 0ae97cf7dd
commit 04e9ee5f15
2 changed files with 16 additions and 8 deletions
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8
winsup/cygserver/ChangeLog
View File

@ -1,3 +1,11 @@
2004-09-21 Corinna Vinschen <corinna@vinschen.de>
* sysv_shm.cc (vm_object_reference): remove Cygwin specific define.
(vm_map_find): Ditto.
(vm_map_inherit): Ditto.
(kern_shmat): On Cygwin, take shmaddr just as is. Don't call vm
system calls on Cygwin. Add comment.
2004-09-15 Corinna Vinschen <corinna@vinschen.de>
Fix copyright throughout.

16
winsup/cygserver/sysv_shm.cc
View File

@ -80,10 +80,7 @@ __FBSDID("$FreeBSD: /repoman/r/ncvs/src/sys/kern/sysv_shm.c,v 1.89 2003/11/07 04
#define vm_object_clear_flag(a,b)
#define vm_object_set_flag(a,b)
#define VM_OBJECT_UNLOCK(a)
#define vm_object_reference(a)
#define vm_map_remove(a,b,c) KERN_SUCCESS
#define vm_map_find(a,b,c,d,e,f,g,h,i) KERN_SUCCESS
#define vm_map_inherit(a,b,c,d)
typedef int vm_prot_t;
#endif /* __CYGWIN__ */
@ -383,6 +380,13 @@ kern_shmat(struct thread *td, int shmid, const void *shmaddr, int shmflg)
prot |= VM_PROT_WRITE;
flags = MAP_ANON | MAP_SHARED;
debug_printf ("shmaddr: %x, shmflg: %x", shmaddr, shmflg);
#ifdef __CYGWIN__
/* The alignment checks have already been made in the Cygwin DLL
and shmat's only job is to keep record of the attached mem.
These checks break shm on 9x since MapViewOfFileEx apparently
returns memory which isn't aligned to SHMLBA. Go figure! */
attach_va = (vm_offset_t)shmaddr;
#else
if (shmaddr) {
flags |= MAP_FIXED;
if (shmflg & SHM_RND) {
@ -390,7 +394,6 @@ kern_shmat(struct thread *td, int shmid, const void *shmaddr, int shmflg)
} else if (((vm_offset_t)shmaddr & (SHMLBA-1)) == 0) {
attach_va = (vm_offset_t)shmaddr;
} else {
debug_printf ("Odd shmaddr: EINVAL");
error = EINVAL;
goto done2;
}
@ -399,12 +402,8 @@ kern_shmat(struct thread *td, int shmid, const void *shmaddr, int shmflg)
* This is just a hint to vm_map_find() about where to
* put it.
*/
#ifdef __CYGWIN__
attach_va = 0;
#else
attach_va = round_page((vm_offset_t)p->p_vmspace->vm_taddr
+ maxtsiz + maxdsiz);
#endif
}
shm_handle = shmseg->shm_internal;
@ -417,6 +416,7 @@ kern_shmat(struct thread *td, int shmid, const void *shmaddr, int shmflg)
}
vm_map_inherit(&p->p_vmspace->vm_map,
attach_va, attach_va + size, VM_INHERIT_SHARE);
#endif
shmmap_s->va = attach_va;
shmmap_s->shmid = shmid;