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-rw-r--r--src/liblzma/simple/arm.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/src/liblzma/simple/arm.c b/src/liblzma/simple/arm.c
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+++ b/src/liblzma/simple/arm.c
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+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file arm.c
+/// \brief Filter for ARM binaries
+//
+// Copyright (C) 1999-2006 Igor Pavlov
+// Copyright (C) 2007 Lasse Collin
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_private.h"
+
+
+static size_t
+arm_code(lzma_simple *simple lzma_attribute((unused)),
+ uint32_t now_pos, bool is_encoder,
+ uint8_t *buffer, size_t size)
+{
+ uint32_t i;
+ for (i = 0; i + 4 <= size; i += 4) {
+ if (buffer[i + 3] == 0xEB) {
+ uint32_t src = (buffer[i + 2] << 16)
+ | (buffer[i + 1] << 8)
+ | (buffer[i + 0]);
+ src <<= 2;
+
+ uint32_t dest;
+ if (is_encoder)
+ dest = now_pos + (uint32_t)(i) + 8 + src;
+ else
+ dest = src - (now_pos + (uint32_t)(i) + 8);
+
+ dest >>= 2;
+ buffer[i + 2] = (dest >> 16);
+ buffer[i + 1] = (dest >> 8);
+ buffer[i + 0] = dest;
+ }
+ }
+
+ return i;
+}
+
+
+static lzma_ret
+arm_coder_init(lzma_next_coder *next, lzma_allocator *allocator,
+ const lzma_filter_info *filters, bool is_encoder)
+{
+ return lzma_simple_coder_init(next, allocator, filters,
+ &arm_code, 0, 4, is_encoder);
+}
+
+
+extern lzma_ret
+lzma_simple_arm_encoder_init(lzma_next_coder *next, lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return arm_coder_init(next, allocator, filters, true);
+}
+
+
+extern lzma_ret
+lzma_simple_arm_decoder_init(lzma_next_coder *next, lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return arm_coder_init(next, allocator, filters, false);
+}