blob: 09bc67f15f5e6d5bac5110825a14995abd8661b9 [file] [log] [blame]
///////////////////////////////////////////////////////////////////////////////
//
/// \file sparc.c
/// \brief Filter for SPARC 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
sparc_code(lzma_simple *simple lzma_attribute((unused)),
uint32_t now_pos, bool is_encoder,
uint8_t *buffer, size_t size)
{
size_t i;
for (i = 0; i + 4 <= size; i += 4) {
if ((buffer[i] == 0x40 && (buffer[i + 1] & 0xC0) == 0x00)
|| (buffer[i] == 0x7F
&& (buffer[i + 1] & 0xC0) == 0xC0)) {
uint32_t src = ((uint32_t)buffer[i + 0] << 24)
| ((uint32_t)buffer[i + 1] << 16)
| ((uint32_t)buffer[i + 2] << 8)
| ((uint32_t)buffer[i + 3]);
src <<= 2;
uint32_t dest;
if (is_encoder)
dest = now_pos + (uint32_t)(i) + src;
else
dest = src - (now_pos + (uint32_t)(i));
dest >>= 2;
dest = (((0 - ((dest >> 22) & 1)) << 22) & 0x3FFFFFFF)
| (dest & 0x3FFFFF)
| 0x40000000;
buffer[i + 0] = (uint8_t)(dest >> 24);
buffer[i + 1] = (uint8_t)(dest >> 16);
buffer[i + 2] = (uint8_t)(dest >> 8);
buffer[i + 3] = (uint8_t)(dest);
}
}
return i;
}
static lzma_ret
sparc_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,
&sparc_code, 0, 4, is_encoder);
}
extern lzma_ret
lzma_simple_sparc_encoder_init(lzma_next_coder *next,
lzma_allocator *allocator, const lzma_filter_info *filters)
{
return sparc_coder_init(next, allocator, filters, true);
}
extern lzma_ret
lzma_simple_sparc_decoder_init(lzma_next_coder *next,
lzma_allocator *allocator, const lzma_filter_info *filters)
{
return sparc_coder_init(next, allocator, filters, false);
}