Date: Wed, 16 Sep 2020 15:45:36 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r365805 - stable/12/sys/vm Message-ID: <202009161545.08GFjaWS011113@repo.freebsd.org>
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Author: kib Date: Wed Sep 16 15:45:35 2020 New Revision: 365805 URL: https://svnweb.freebsd.org/changeset/base/365805 Log: MFC r365516: Add vm_map_find_aligned(9). Modified: stable/12/sys/vm/vm_map.c stable/12/sys/vm/vm_map.h Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/vm/vm_map.c ============================================================================== --- stable/12/sys/vm/vm_map.c Wed Sep 16 15:42:58 2020 (r365804) +++ stable/12/sys/vm/vm_map.c Wed Sep 16 15:45:35 2020 (r365805) @@ -1856,6 +1856,19 @@ vm_map_alignspace(vm_map_t map, vm_object_t object, vm } } +int +vm_map_find_aligned(vm_map_t map, vm_offset_t *addr, vm_size_t length, + vm_offset_t max_addr, vm_offset_t alignment) +{ + /* XXXKIB ASLR eh ? */ + *addr = vm_map_findspace(map, *addr, length); + if (*addr + length > vm_map_max(map) || + (max_addr != 0 && *addr + length > max_addr)) + return (KERN_NO_SPACE); + return (vm_map_alignspace(map, NULL, 0, addr, length, max_addr, + alignment)); +} + /* * vm_map_find finds an unallocated region in the target address * map with the given length. The search is defined to be Modified: stable/12/sys/vm/vm_map.h ============================================================================== --- stable/12/sys/vm/vm_map.h Wed Sep 16 15:42:58 2020 (r365804) +++ stable/12/sys/vm/vm_map.h Wed Sep 16 15:45:35 2020 (r365805) @@ -419,6 +419,8 @@ int vm_map_find(vm_map_t, vm_object_t, vm_ooffset_t, v vm_offset_t, int, vm_prot_t, vm_prot_t, int); int vm_map_find_min(vm_map_t, vm_object_t, vm_ooffset_t, vm_offset_t *, vm_size_t, vm_offset_t, vm_offset_t, int, vm_prot_t, vm_prot_t, int); +int vm_map_find_aligned(vm_map_t map, vm_offset_t *addr, vm_size_t length, + vm_offset_t max_addr, vm_offset_t alignment); int vm_map_fixed(vm_map_t, vm_object_t, vm_ooffset_t, vm_offset_t, vm_size_t, vm_prot_t, vm_prot_t, int); vm_offset_t vm_map_findspace(vm_map_t, vm_offset_t, vm_size_t);
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