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sparc.c (292588) sparc.c (312518)
1///////////////////////////////////////////////////////////////////////////////
2//
3/// \file sparc.c
4/// \brief Filter for SPARC binaries
5///
6// Authors: Igor Pavlov
7// Lasse Collin
8//
9// This file has been put into the public domain.
10// You can do whatever you want with this file.
11//
12///////////////////////////////////////////////////////////////////////////////
13
14#include "simple_private.h"
15
16
17static size_t
1///////////////////////////////////////////////////////////////////////////////
2//
3/// \file sparc.c
4/// \brief Filter for SPARC binaries
5///
6// Authors: Igor Pavlov
7// Lasse Collin
8//
9// This file has been put into the public domain.
10// You can do whatever you want with this file.
11//
12///////////////////////////////////////////////////////////////////////////////
13
14#include "simple_private.h"
15
16
17static size_t
18sparc_code(lzma_simple *simple lzma_attribute((__unused__)),
18sparc_code(void *simple lzma_attribute((__unused__)),
19 uint32_t now_pos, bool is_encoder,
20 uint8_t *buffer, size_t size)
21{
22 size_t i;
23 for (i = 0; i + 4 <= size; i += 4) {
24
25 if ((buffer[i] == 0x40 && (buffer[i + 1] & 0xC0) == 0x00)
26 || (buffer[i] == 0x7F
27 && (buffer[i + 1] & 0xC0) == 0xC0)) {
28
29 uint32_t src = ((uint32_t)buffer[i + 0] << 24)
30 | ((uint32_t)buffer[i + 1] << 16)
31 | ((uint32_t)buffer[i + 2] << 8)
32 | ((uint32_t)buffer[i + 3]);
33
34 src <<= 2;
35
36 uint32_t dest;
37 if (is_encoder)
38 dest = now_pos + (uint32_t)(i) + src;
39 else
40 dest = src - (now_pos + (uint32_t)(i));
41
42 dest >>= 2;
43
44 dest = (((0 - ((dest >> 22) & 1)) << 22) & 0x3FFFFFFF)
45 | (dest & 0x3FFFFF)
46 | 0x40000000;
47
48 buffer[i + 0] = (uint8_t)(dest >> 24);
49 buffer[i + 1] = (uint8_t)(dest >> 16);
50 buffer[i + 2] = (uint8_t)(dest >> 8);
51 buffer[i + 3] = (uint8_t)(dest);
52 }
53 }
54
55 return i;
56}
57
58
59static lzma_ret
60sparc_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
61 const lzma_filter_info *filters, bool is_encoder)
62{
63 return lzma_simple_coder_init(next, allocator, filters,
64 &sparc_code, 0, 4, 4, is_encoder);
65}
66
67
68extern lzma_ret
69lzma_simple_sparc_encoder_init(lzma_next_coder *next,
70 const lzma_allocator *allocator,
71 const lzma_filter_info *filters)
72{
73 return sparc_coder_init(next, allocator, filters, true);
74}
75
76
77extern lzma_ret
78lzma_simple_sparc_decoder_init(lzma_next_coder *next,
79 const lzma_allocator *allocator,
80 const lzma_filter_info *filters)
81{
82 return sparc_coder_init(next, allocator, filters, false);
83}
19 uint32_t now_pos, bool is_encoder,
20 uint8_t *buffer, size_t size)
21{
22 size_t i;
23 for (i = 0; i + 4 <= size; i += 4) {
24
25 if ((buffer[i] == 0x40 && (buffer[i + 1] & 0xC0) == 0x00)
26 || (buffer[i] == 0x7F
27 && (buffer[i + 1] & 0xC0) == 0xC0)) {
28
29 uint32_t src = ((uint32_t)buffer[i + 0] << 24)
30 | ((uint32_t)buffer[i + 1] << 16)
31 | ((uint32_t)buffer[i + 2] << 8)
32 | ((uint32_t)buffer[i + 3]);
33
34 src <<= 2;
35
36 uint32_t dest;
37 if (is_encoder)
38 dest = now_pos + (uint32_t)(i) + src;
39 else
40 dest = src - (now_pos + (uint32_t)(i));
41
42 dest >>= 2;
43
44 dest = (((0 - ((dest >> 22) & 1)) << 22) & 0x3FFFFFFF)
45 | (dest & 0x3FFFFF)
46 | 0x40000000;
47
48 buffer[i + 0] = (uint8_t)(dest >> 24);
49 buffer[i + 1] = (uint8_t)(dest >> 16);
50 buffer[i + 2] = (uint8_t)(dest >> 8);
51 buffer[i + 3] = (uint8_t)(dest);
52 }
53 }
54
55 return i;
56}
57
58
59static lzma_ret
60sparc_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
61 const lzma_filter_info *filters, bool is_encoder)
62{
63 return lzma_simple_coder_init(next, allocator, filters,
64 &sparc_code, 0, 4, 4, is_encoder);
65}
66
67
68extern lzma_ret
69lzma_simple_sparc_encoder_init(lzma_next_coder *next,
70 const lzma_allocator *allocator,
71 const lzma_filter_info *filters)
72{
73 return sparc_coder_init(next, allocator, filters, true);
74}
75
76
77extern lzma_ret
78lzma_simple_sparc_decoder_init(lzma_next_coder *next,
79 const lzma_allocator *allocator,
80 const lzma_filter_info *filters)
81{
82 return sparc_coder_init(next, allocator, filters, false);
83}