Define _STRING_ARCH_unaligned unconditionally
This patch defines _STRING_ARCH_unaligned to 0 on default bits/string.h header to avoid undefined compiler warnings on platforms that do not define it. It also make adjustments in code where tests checked if macro existed or not.
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Adhemerval Zanella
parent
a88ddc902b
commit
27822ce67f
13
ChangeLog
13
ChangeLog
@ -1,3 +1,16 @@
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2014-04-09 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
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* bits/string.h (_STRING_ARCH_unaligned): Define it to 0.
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* crypt/sha256.c (_STRING_ARCH_unaligned): Check its value instead of its
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definition.
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* iconv/gconv_simple.c (_STRING_ARCH_unaligned): Likewise.
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* iconv/loop.c (_STRING_ARCH_unaligned): Likewise.
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* iconv/skeleton.c (_STRING_ARCH_unaligned): Likewise.
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* nscd/nscd_gethst_r.c (_STRING_ARCH_unaligned): Likewise.
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* nscd/nscd_getserv_r.c (_STRING_ARCH_unaligned): Likewise.
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* nscd/nscd_helper.c (_STRING_ARCH_unaligned): Likewise.
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* resolv/res_send.c (_STRING_ARCH_unaligned): Likewise.
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2014-04-09 Peter Brett <peter@peter-b.co.uk>
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[BZ #15514]
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@ -8,5 +8,7 @@
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#ifndef _BITS_STRING_H
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#define _BITS_STRING_H 1
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/* Define if architecture can access unaligned multi-byte variables. */
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#define _STRING_ARCH_unaligned 0
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#endif /* bits/string.h */
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@ -125,7 +125,7 @@ __sha256_finish_ctx (ctx, resbuf)
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memcpy (&ctx->buffer[bytes], fillbuf, pad);
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/* Put the 64-bit file length in *bits* at the end of the buffer. */
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#ifdef _STRING_ARCH_unaligned
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#if _STRING_ARCH_unaligned
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ctx->buffer64[(bytes + pad) / 8] = SWAP64 (ctx->total64 << 3);
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#else
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ctx->buffer32[(bytes + pad + 4) / 4] = SWAP (ctx->total[TOTAL64_low] << 3);
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@ -112,7 +112,7 @@ internal_ucs4_loop (struct __gconv_step *step,
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return result;
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}
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#ifndef _STRING_ARCH_unaligned
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#if !_STRING_ARCH_unaligned
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static inline int
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__attribute ((always_inline))
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internal_ucs4_loop_unaligned (struct __gconv_step *step,
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@ -289,7 +289,7 @@ ucs4_internal_loop (struct __gconv_step *step,
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return result;
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}
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#ifndef _STRING_ARCH_unaligned
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#if !_STRING_ARCH_unaligned
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static inline int
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__attribute ((always_inline))
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ucs4_internal_loop_unaligned (struct __gconv_step *step,
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@ -478,7 +478,7 @@ internal_ucs4le_loop (struct __gconv_step *step,
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return result;
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}
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#ifndef _STRING_ARCH_unaligned
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#if !_STRING_ARCH_unaligned
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static inline int
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__attribute ((always_inline))
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internal_ucs4le_loop_unaligned (struct __gconv_step *step,
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@ -658,7 +658,7 @@ ucs4le_internal_loop (struct __gconv_step *step,
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return result;
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}
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#ifndef _STRING_ARCH_unaligned
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#if !_STRING_ARCH_unaligned
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static inline int
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__attribute ((always_inline))
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ucs4le_internal_loop_unaligned (struct __gconv_step *step,
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@ -63,7 +63,7 @@
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representations with a fixed width of 2 or 4 bytes. But if we cannot
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access unaligned memory we still have to read byte-wise. */
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#undef FCTNAME2
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#if defined _STRING_ARCH_unaligned || !defined DEFINE_UNALIGNED
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#if _STRING_ARCH_unaligned || !defined DEFINE_UNALIGNED
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/* We can handle unaligned memory access. */
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# define get16(addr) *((const uint16_t *) (addr))
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# define get32(addr) *((const uint32_t *) (addr))
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@ -342,7 +342,7 @@ FCTNAME (LOOPFCT) (struct __gconv_step *step,
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/* Include the file a second time to define the function to handle
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unaligned access. */
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#if !defined DEFINE_UNALIGNED && !defined _STRING_ARCH_unaligned \
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#if !defined DEFINE_UNALIGNED && !_STRING_ARCH_unaligned \
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&& MIN_NEEDED_INPUT != 1 && MAX_NEEDED_INPUT % MIN_NEEDED_INPUT == 0 \
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&& MIN_NEEDED_OUTPUT != 1 && MAX_NEEDED_OUTPUT % MIN_NEEDED_OUTPUT == 0
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# undef get16
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@ -204,7 +204,7 @@
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/* Define macros which can access unaligned buffers. These macros are
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supposed to be used only in code outside the inner loops. For the inner
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loops we have other definitions which allow optimized access. */
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#ifdef _STRING_ARCH_unaligned
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#if _STRING_ARCH_unaligned
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/* We can handle unaligned memory access. */
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# define get16u(addr) *((const uint16_t *) (addr))
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# define get32u(addr) *((const uint32_t *) (addr))
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@ -523,7 +523,7 @@ FUNCTION_NAME (struct __gconv_step *step, struct __gconv_step_data *data,
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INTERNAL, for which the subexpression evaluates to 1, but INTERNAL
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buffers are always aligned correctly. */
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#define POSSIBLY_UNALIGNED \
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(!defined _STRING_ARCH_unaligned \
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(!_STRING_ARCH_unaligned \
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&& (((FROM_LOOP_MIN_NEEDED_FROM != 1 \
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&& FROM_LOOP_MAX_NEEDED_FROM % FROM_LOOP_MIN_NEEDED_FROM == 0) \
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&& (FROM_LOOP_MIN_NEEDED_TO != 1 \
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@ -191,7 +191,7 @@ nscd_gethst_r (const char *key, size_t keylen, request_type type,
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goto out;
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}
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#ifndef _STRING_ARCH_unaligned
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#if !_STRING_ARCH_unaligned
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/* The aliases_len array in the mapped database might very
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well be unaligned. We will access it word-wise so on
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platforms which do not tolerate unaligned accesses we
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@ -141,7 +141,7 @@ nscd_getserv_r (const char *crit, size_t critlen, const char *proto,
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> recend, 0))
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goto out;
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#ifndef _STRING_ARCH_unaligned
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#if !_STRING_ARCH_unaligned
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/* The aliases_len array in the mapped database might very
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well be unaligned. We will access it word-wise so on
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platforms which do not tolerate unaligned accesses we
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@ -490,7 +490,7 @@ __nscd_cache_search (request_type type, const char *key, size_t keylen,
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struct hashentry *here = (struct hashentry *) (mapped->data + work);
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ref_t here_key, here_packet;
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#ifndef _STRING_ARCH_unaligned
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#if !_STRING_ARCH_unaligned
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/* Although during garbage collection when moving struct hashentry
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records around we first copy from old to new location and then
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adjust pointer from previous hashentry to it, there is no barrier
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@ -512,7 +512,7 @@ __nscd_cache_search (request_type type, const char *key, size_t keylen,
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struct datahead *dh
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= (struct datahead *) (mapped->data + here_packet);
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#ifndef _STRING_ARCH_unaligned
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#if !_STRING_ARCH_unaligned
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if ((uintptr_t) dh & (__alignof__ (*dh) - 1))
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return NULL;
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#endif
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@ -536,7 +536,7 @@ __nscd_cache_search (request_type type, const char *key, size_t keylen,
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struct hashentry *trailelem;
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trailelem = (struct hashentry *) (mapped->data + trail);
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#ifndef _STRING_ARCH_unaligned
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#if !_STRING_ARCH_unaligned
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/* We have to redo the checks. Maybe the data changed. */
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if ((uintptr_t) trailelem & (__alignof__ (*trailelem) - 1))
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return NULL;
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@ -787,7 +787,7 @@ send_vc(res_state statp,
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/* No buffer allocated for the first
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reply. We can try to use the rest
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of the user-provided buffer. */
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#ifdef _STRING_ARCH_unaligned
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#if _STRING_ARCH_unaligned
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*anssizp2 = orig_anssizp - resplen;
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*ansp2 = *ansp + resplen;
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#else
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@ -1205,7 +1205,7 @@ send_dg(res_state statp,
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/* No buffer allocated for the first
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reply. We can try to use the rest
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of the user-provided buffer. */
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#ifdef _STRING_ARCH_unaligned
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#if _STRING_ARCH_unaligned
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*anssizp2 = orig_anssizp - resplen;
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*ansp2 = *ansp + resplen;
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#else
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