Rizin
unix-like reverse engineering framework and cli tools
ia64.c File Reference

Filter for IA64 (Itanium) binaries. More...

#include "simple_private.h"

Go to the source code of this file.

Functions

static size_t ia64_code (void *simple lzma_attribute((__unused__)), uint32_t now_pos, bool is_encoder, uint8_t *buffer, size_t size)
 
static lzma_ret ia64_coder_init (lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters, bool is_encoder)
 
lzma_ret lzma_simple_ia64_encoder_init (lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters)
 
lzma_ret lzma_simple_ia64_decoder_init (lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters)
 

Detailed Description

Filter for IA64 (Itanium) binaries.

Definition in file ia64.c.

Function Documentation

◆ ia64_code()

static size_t ia64_code ( void *simple   lzma_attribute(__unused__),
uint32_t  now_pos,
bool  is_encoder,
uint8_t buffer,
size_t  size 
)
static

Definition at line 18 of file ia64.c.

21 {
22  static const uint32_t BRANCH_TABLE[32] = {
23  0, 0, 0, 0, 0, 0, 0, 0,
24  0, 0, 0, 0, 0, 0, 0, 0,
25  4, 4, 6, 6, 0, 0, 7, 7,
26  4, 4, 0, 0, 4, 4, 0, 0
27  };
28 
29  size_t i;
30  for (i = 0; i + 16 <= size; i += 16) {
31  const uint32_t instr_template = buffer[i] & 0x1F;
32  const uint32_t mask = BRANCH_TABLE[instr_template];
33  uint32_t bit_pos = 5;
34 
35  for (size_t slot = 0; slot < 3; ++slot, bit_pos += 41) {
36  if (((mask >> slot) & 1) == 0)
37  continue;
38 
39  const size_t byte_pos = (bit_pos >> 3);
40  const uint32_t bit_res = bit_pos & 0x7;
42 
43  for (size_t j = 0; j < 6; ++j)
44  instruction += (uint64_t)(
45  buffer[i + j + byte_pos])
46  << (8 * j);
47 
48  uint64_t inst_norm = instruction >> bit_res;
49 
50  if (((inst_norm >> 37) & 0xF) == 0x5
51  && ((inst_norm >> 9) & 0x7) == 0
52  /* && (inst_norm & 0x3F)== 0 */
53  ) {
54  uint32_t src = (uint32_t)(
55  (inst_norm >> 13) & 0xFFFFF);
56  src |= ((inst_norm >> 36) & 1) << 20;
57 
58  src <<= 4;
59 
60  uint32_t dest;
61  if (is_encoder)
62  dest = now_pos + (uint32_t)(i) + src;
63  else
64  dest = src - (now_pos + (uint32_t)(i));
65 
66  dest >>= 4;
67 
68  inst_norm &= ~((uint64_t)(0x8FFFFF) << 13);
69  inst_norm |= (uint64_t)(dest & 0xFFFFF) << 13;
70  inst_norm |= (uint64_t)(dest & 0x100000)
71  << (36 - 20);
72 
73  instruction &= (1U << bit_res) - 1;
74  instruction |= (inst_norm << bit_res);
75 
76  for (size_t j = 0; j < 6; j++)
77  buffer[i + j + byte_pos] = (uint8_t)(
79  >> (8 * j));
80  }
81  }
82  }
83 
84  return i;
85 }
#define mask()
lzma_index ** i
Definition: index.h:629
lzma_index * src
Definition: index.h:567
voidpf void uLong size
Definition: ioapi.h:138
char * dest
Definition: lz4.h:697
unsigned int uint32_t
Definition: sftypes.h:29
unsigned long uint64_t
Definition: sftypes.h:28
unsigned char uint8_t
Definition: sftypes.h:31
Definition: buffer.h:15

References dest, i, mask, and src.

Referenced by ia64_coder_init().

◆ ia64_coder_init()

static lzma_ret ia64_coder_init ( lzma_next_coder next,
const lzma_allocator allocator,
const lzma_filter_info filters,
bool  is_encoder 
)
static

Definition at line 89 of file ia64.c.

91 {
93  &ia64_code, 0, 16, 16, is_encoder);
94 }
const lzma_allocator * allocator
Definition: block.h:377
const lzma_filter * filters
Definition: container.h:315
static size_t ia64_code(void *simple lzma_attribute((__unused__)), uint32_t now_pos, bool is_encoder, uint8_t *buffer, size_t size)
Definition: ia64.c:18
lzma_ret lzma_simple_coder_init(lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters, size_t(*filter)(void *simple, uint32_t now_pos, bool is_encoder, uint8_t *buffer, size_t size), size_t simple_size, size_t unfiltered_max, uint32_t alignment, bool is_encoder)
Definition: simple_coder.c:235

References allocator, filters, ia64_code(), and lzma_simple_coder_init().

Referenced by lzma_simple_ia64_decoder_init(), and lzma_simple_ia64_encoder_init().

◆ lzma_simple_ia64_decoder_init()

lzma_ret lzma_simple_ia64_decoder_init ( lzma_next_coder next,
const lzma_allocator allocator,
const lzma_filter_info filters 
)

Definition at line 107 of file ia64.c.

110 {
111  return ia64_coder_init(next, allocator, filters, false);
112 }
static lzma_ret ia64_coder_init(lzma_next_coder *next, const lzma_allocator *allocator, const lzma_filter_info *filters, bool is_encoder)
Definition: ia64.c:89

References allocator, filters, and ia64_coder_init().

◆ lzma_simple_ia64_encoder_init()

lzma_ret lzma_simple_ia64_encoder_init ( lzma_next_coder next,
const lzma_allocator allocator,
const lzma_filter_info filters 
)

Definition at line 98 of file ia64.c.

101 {
102  return ia64_coder_init(next, allocator, filters, true);
103 }

References allocator, filters, and ia64_coder_init().