You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
113 lines
2.7 KiB
113 lines
2.7 KiB
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
/// \file ia64.c
|
|
/// \brief Filter for IA64 (Itanium) binaries
|
|
///
|
|
// Authors: Igor Pavlov
|
|
// Lasse Collin
|
|
//
|
|
// This file has been put into the public domain.
|
|
// You can do whatever you want with this file.
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "simple_private.h"
|
|
|
|
|
|
static size_t
|
|
ia64_code(void *simple lzma_attribute((__unused__)),
|
|
uint32_t now_pos, bool is_encoder,
|
|
uint8_t *buffer, size_t size)
|
|
{
|
|
static const uint32_t BRANCH_TABLE[32] = {
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
|
4, 4, 6, 6, 0, 0, 7, 7,
|
|
4, 4, 0, 0, 4, 4, 0, 0
|
|
};
|
|
|
|
size_t i;
|
|
for (i = 0; i + 16 <= size; i += 16) {
|
|
const uint32_t instr_template = buffer[i] & 0x1F;
|
|
const uint32_t mask = BRANCH_TABLE[instr_template];
|
|
uint32_t bit_pos = 5;
|
|
|
|
for (size_t slot = 0; slot < 3; ++slot, bit_pos += 41) {
|
|
if (((mask >> slot) & 1) == 0)
|
|
continue;
|
|
|
|
const size_t byte_pos = (bit_pos >> 3);
|
|
const uint32_t bit_res = bit_pos & 0x7;
|
|
uint64_t instruction = 0;
|
|
|
|
for (size_t j = 0; j < 6; ++j)
|
|
instruction += (uint64_t)(
|
|
buffer[i + j + byte_pos])
|
|
<< (8 * j);
|
|
|
|
uint64_t inst_norm = instruction >> bit_res;
|
|
|
|
if (((inst_norm >> 37) & 0xF) == 0x5
|
|
&& ((inst_norm >> 9) & 0x7) == 0
|
|
/* && (inst_norm & 0x3F)== 0 */
|
|
) {
|
|
uint32_t src = (uint32_t)(
|
|
(inst_norm >> 13) & 0xFFFFF);
|
|
src |= ((inst_norm >> 36) & 1) << 20;
|
|
|
|
src <<= 4;
|
|
|
|
uint32_t dest;
|
|
if (is_encoder)
|
|
dest = now_pos + (uint32_t)(i) + src;
|
|
else
|
|
dest = src - (now_pos + (uint32_t)(i));
|
|
|
|
dest >>= 4;
|
|
|
|
inst_norm &= ~((uint64_t)(0x8FFFFF) << 13);
|
|
inst_norm |= (uint64_t)(dest & 0xFFFFF) << 13;
|
|
inst_norm |= (uint64_t)(dest & 0x100000)
|
|
<< (36 - 20);
|
|
|
|
instruction &= (1U << bit_res) - 1;
|
|
instruction |= (inst_norm << bit_res);
|
|
|
|
for (size_t j = 0; j < 6; j++)
|
|
buffer[i + j + byte_pos] = (uint8_t)(
|
|
instruction
|
|
>> (8 * j));
|
|
}
|
|
}
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
|
|
static lzma_ret
|
|
ia64_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
|
|
const lzma_filter_info *filters, bool is_encoder)
|
|
{
|
|
return lzma_simple_coder_init(next, allocator, filters,
|
|
&ia64_code, 0, 16, 16, is_encoder);
|
|
}
|
|
|
|
|
|
extern lzma_ret
|
|
lzma_simple_ia64_encoder_init(lzma_next_coder *next,
|
|
const lzma_allocator *allocator,
|
|
const lzma_filter_info *filters)
|
|
{
|
|
return ia64_coder_init(next, allocator, filters, true);
|
|
}
|
|
|
|
|
|
extern lzma_ret
|
|
lzma_simple_ia64_decoder_init(lzma_next_coder *next,
|
|
const lzma_allocator *allocator,
|
|
const lzma_filter_info *filters)
|
|
{
|
|
return ia64_coder_init(next, allocator, filters, false);
|
|
}
|