Date: Fri, 13 Dec 2013 06:00:44 +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-10@freebsd.org Subject: svn commit: r259290 - stable/10/libexec/rtld-elf Message-ID: <201312130600.rBD60icu078913@svn.freebsd.org>
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Author: kib Date: Fri Dec 13 06:00:44 2013 New Revision: 259290 URL: http://svnweb.freebsd.org/changeset/base/259290 Log: MFC r259043: Build an allocator for the aligned memory on top of the rtld-private malloc. Modified: stable/10/libexec/rtld-elf/rtld.h stable/10/libexec/rtld-elf/xmalloc.c Directory Properties: stable/10/ (props changed) Modified: stable/10/libexec/rtld-elf/rtld.h ============================================================================== --- stable/10/libexec/rtld-elf/rtld.h Fri Dec 13 05:54:58 2013 (r259289) +++ stable/10/libexec/rtld-elf/rtld.h Fri Dec 13 06:00:44 2013 (r259290) @@ -352,6 +352,8 @@ Obj_Entry *map_object(int, const char *, void *xcalloc(size_t, size_t); void *xmalloc(size_t); char *xstrdup(const char *); +void *malloc_aligned(size_t size, size_t align); +void free_aligned(void *ptr); extern Elf_Addr _GLOBAL_OFFSET_TABLE_[]; extern Elf_Sym sym_zero; /* For resolving undefined weak refs. */ Modified: stable/10/libexec/rtld-elf/xmalloc.c ============================================================================== --- stable/10/libexec/rtld-elf/xmalloc.c Fri Dec 13 05:54:58 2013 (r259289) +++ stable/10/libexec/rtld-elf/xmalloc.c Fri Dec 13 06:00:44 2013 (r259290) @@ -67,3 +67,33 @@ xstrdup(const char *str) memcpy(copy, str, len); return (copy); } + +void * +malloc_aligned(size_t size, size_t align) +{ + void *mem, *res; + uintptr_t x; + size_t asize, r; + + r = round(sizeof(void *), align); + asize = round(size, align) + r; + mem = xmalloc(asize); + x = (uintptr_t)mem; + res = (void *)round(x, align); + *(void **)((uintptr_t)res - sizeof(void *)) = mem; + return (res); +} + +void +free_aligned(void *ptr) +{ + void *mem; + uintptr_t x; + + if (ptr == NULL) + return; + x = (uintptr_t)ptr; + x -= sizeof(void *); + mem = *(void **)x; + free(mem); +}
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