Add a mmap flag (MAP_32BIT) on 64-bit platforms to request that a mapping use

an address in the first 2GB of the process's address space.  This flag should
have the same semantics as the same flag on Linux.

To facilitate this, add a new parameter to vm_map_find() that specifies an
optional maximum virtual address.  While here, fix several callers of
vm_map_find() to use a VMFS_* constant for the findspace argument instead of
TRUE and FALSE.

Reviewed by:	alc
Approved by:	re (kib)

1 files changed, 4 insertions, 3 deletions

diff --git a/sys/compat/linux/linux_misc.c b/sys/compat/linux/linux_misc.c
index 378bc37..ac2384c 100644
--- a/sys/compat/linux/linux_misc.c
+++ b/sys/compat/linux/linux_misc.c
@@ -410,8 +410,8 @@ linux_uselib(struct thread *td, struct linux_uselib_args *args)
 
 		/* get anon user mapping, read+write+execute */
 		error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
-		    &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL,
-		    VM_PROT_ALL, 0);
+		    &vmaddr, a_out->a_text + a_out->a_data, 0, VMFS_NO_SPACE,
+		    VM_PROT_ALL, VM_PROT_ALL, 0);
 		if (error)
 			goto cleanup;
 
@@ -455,7 +455,8 @@ linux_uselib(struct thread *td, struct linux_uselib_args *args)
 
 		/* allocate some 'anon' space */
 		error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
-		    &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
+		    &vmaddr, bss_size, 0, VMFS_NO_SPACE, VM_PROT_ALL,
+		    VM_PROT_ALL, 0);
 		if (error)
 			goto cleanup;
 	}