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66264b5d97
All memory operations (except the "safe ones") live in the firmware so the fast operations can be used. Except Memset. This CL changes that problem. This CL needs https://gerrit.chromium.org/gerrit/#change,10992 and a similar change in H2C. BUG=chrome-os-partner:6313 TEST=run coreboot/u-boot on Stumpy Change-Id: Ic961ebbb45470c8fc1316490b902759dcf221deb Reviewed-on: https://gerrit.chromium.org/gerrit/10993 Tested-by: Stefan Reinauer <reinauer@chromium.org> Reviewed-by: Bill Richardson <wfrichar@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org>
26 lines
643 B
C
26 lines
643 B
C
/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Utility functions that need to be built as part of the firmware.
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*/
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#include "sysincludes.h"
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#include "utility.h"
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int SafeMemcmp(const void* s1, const void* s2, size_t n) {
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const unsigned char* us1 = s1;
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const unsigned char* us2 = s2;
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int result = 0;
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if (0 == n)
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return 0;
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/* Code snippet without data-dependent branch due to
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* Nate Lawson (nate@root.org) of Root Labs. */
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while (n--)
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result |= *us1++ ^ *us2++;
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return result != 0;
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}
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