1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
|
(*Generated by Lem from elf_relocation.lem.*)
(** [elf_relocation] formalises types, functions and other definitions for working
* with ELF relocation and relocation with addend entries.
*)
open Lem_basic_classes
open Lem_num
open Lem_list
(*import Set*)
open Endianness
open Byte_sequence
open Error
open Lem_string
open Show
open Missing_pervasives
open Elf_types_native_uint
(** ELF relocation records *)
(** [elf32_relocation] is a simple relocation record (without addend).
*)
type elf32_relocation =
{ elf32_r_offset : Uint32.uint32 (** Address at which to relocate *)
; elf32_r_info : Uint32.uint32 (** Symbol table index/type of relocation to apply *)
}
(** [elf32_relocation_a] is a relocation record with addend.
*)
type elf32_relocation_a =
{ elf32_ra_offset : Uint32.uint32 (** Address at which to relocate *)
; elf32_ra_info : Uint32.uint32 (** Symbol table index/type of relocation to apply *)
; elf32_ra_addend : Int32.t (** Addend used to compute value to be stored *)
}
(** [elf64_relocation] is a simple relocation record (without addend).
*)
type elf64_relocation =
{ elf64_r_offset : Uint64.uint64 (** Address at which to relocate *)
; elf64_r_info : Uint64.uint64 (** Symbol table index/type of relocation to apply *)
}
(** [elf64_relocation_a] is a relocation record with addend.
*)
type elf64_relocation_a =
{ elf64_ra_offset : Uint64.uint64 (** Address at which to relocate *)
; elf64_ra_info : Uint64.uint64 (** Symbol table index/type of relocation to apply *)
; elf64_ra_addend : Int64.t (** Addend used to compute value to be stored *)
}
(** [elf64_relocation_a_compare r1 r2] is an ordering comparison function for
* relocation with addend records suitable for constructing sets, finite map
* and other ordered data structures.
* NB: we exclusively use elf64_relocation_a in range tags, regardless of what
* file/reloc the info came from, so only this one needs an Ord instance.
*)
(*val elf64_relocation_a_compare : elf64_relocation_a -> elf64_relocation_a ->
ordering*)
let elf64_relocation_a_compare ent1 ent2:int=
(tripleCompare Nat_big_num.compare Nat_big_num.compare Nat_big_num.compare (Ml_bindings.nat_big_num_of_uint64 ent1.elf64_ra_offset, Ml_bindings.nat_big_num_of_uint64 ent1.elf64_ra_info,
Nat_big_num.of_int64 ent1.elf64_ra_addend)
(Ml_bindings.nat_big_num_of_uint64 ent2.elf64_ra_offset, Ml_bindings.nat_big_num_of_uint64 ent2.elf64_ra_info,
Nat_big_num.of_int64 ent2.elf64_ra_addend))
let instance_Basic_classes_Ord_Elf_relocation_elf64_relocation_a_dict:(elf64_relocation_a)ord_class= ({
compare_method = elf64_relocation_a_compare;
isLess_method = (fun f1 -> (fun f2 -> ( Lem.orderingEqual(elf64_relocation_a_compare f1 f2) (-1))));
isLessEqual_method = (fun f1 -> (fun f2 -> Pset.mem (elf64_relocation_a_compare f1 f2)(Pset.from_list compare [(-1); 0])));
isGreater_method = (fun f1 -> (fun f2 -> ( Lem.orderingEqual(elf64_relocation_a_compare f1 f2) 1)));
isGreaterEqual_method = (fun f1 -> (fun f2 -> Pset.mem (elf64_relocation_a_compare f1 f2)(Pset.from_list compare [1; 0])))})
(** Extracting useful information *)
(** [extract_elf32_relocation_r_sym w] computes the symbol table index associated with
* an ELF32 relocation(a) entry.
* [w] here is the [r_info] member of the [elf32_relocation(a)] type.
*)
(*val extract_elf32_relocation_r_sym : elf32_word -> natural*)
let extract_elf32_relocation_r_sym w:Nat_big_num.num=
(Nat_big_num.of_string (Uint32.to_string (Uint32.shift_right w( 8))))
(** [extract_elf64_relocation_r_sym w] computes the symbol table index associated with
* an ELF64 relocation(a) entry.
* [w] here is the [r_info] member of the [elf64_relocation(a)] type.
*)
(*val extract_elf64_relocation_r_sym : elf64_xword -> natural*)
let extract_elf64_relocation_r_sym w:Nat_big_num.num=
(Ml_bindings.nat_big_num_of_uint64 (Uint64.shift_right w( 32)))
(** [extract_elf32_relocation_r_type w] computes the symbol type associated with an ELF32
* relocation(a) entry.
* [w] here is the [r_info] member of the [elf32_relocation(a)] type.
*)
(*val extract_elf32_relocation_r_type : elf32_word -> natural*)
let extract_elf32_relocation_r_type w:Nat_big_num.num= (Nat_big_num.modulus
(Nat_big_num.of_string (Uint32.to_string w))(Nat_big_num.of_int 256))
(** [extract_elf64_relocation_r_type w] computes the symbol type associated with an ELF64
* relocation(a) entry.
* [w] here is the [r_info] member of the [elf64_relocation(a)] type.
*)
(*val extract_elf64_relocation_r_type : elf64_xword -> natural*)
let extract_elf64_relocation_r_type w:Nat_big_num.num=
(let magic = (Nat_big_num.sub_nat ( Nat_big_num.mul(Nat_big_num.of_int 65536)(Nat_big_num.of_int 65536))(Nat_big_num.of_int 1)) in (* 0xffffffffL *)
Ml_bindings.nat_big_num_of_uint64 (Uint64.logand w (Uint64.of_string (Nat_big_num.to_string magic))))
(* Accessors *)
(*val get_elf32_relocation_r_sym : elf32_relocation -> natural*)
let get_elf32_relocation_r_sym r:Nat_big_num.num=
(extract_elf32_relocation_r_sym r.elf32_r_info)
(*val get_elf32_relocation_a_sym : elf32_relocation_a -> natural*)
let get_elf32_relocation_a_sym r:Nat_big_num.num=
(extract_elf32_relocation_r_sym r.elf32_ra_info)
(*val get_elf64_relocation_sym : elf64_relocation -> natural*)
let get_elf64_relocation_sym r:Nat_big_num.num=
(extract_elf64_relocation_r_sym r.elf64_r_info)
(*val get_elf64_relocation_a_sym : elf64_relocation_a -> natural*)
let get_elf64_relocation_a_sym r:Nat_big_num.num=
(extract_elf64_relocation_r_sym r.elf64_ra_info)
(*val get_elf32_relocation_type : elf32_relocation -> natural*)
let get_elf32_relocation_type r:Nat_big_num.num=
(extract_elf32_relocation_r_type r.elf32_r_info)
(*val get_elf32_relocation_a_type : elf32_relocation_a -> natural*)
let get_elf32_relocation_a_type r:Nat_big_num.num=
(extract_elf32_relocation_r_type r.elf32_ra_info)
(*val get_elf64_relocation_type : elf64_relocation -> natural*)
let get_elf64_relocation_type r:Nat_big_num.num=
(extract_elf64_relocation_r_type r.elf64_r_info)
(*val get_elf64_relocation_a_type : elf64_relocation_a -> natural*)
let get_elf64_relocation_a_type r:Nat_big_num.num=
(extract_elf64_relocation_r_type r.elf64_ra_info)
(** Reading relocation entries *)
(** [read_elf32_relocation ed bs0] parses an [elf32_relocation] record from
* byte sequence [bs0] assuming endianness [ed]. The suffix of [bs0] remaining
* after parsing is also returned.
* Fails if the relocation record cannot be parsed.
*)
(*val read_elf32_relocation : endianness -> byte_sequence ->
error (elf32_relocation * byte_sequence)*)
let read_elf32_relocation endian bs:(elf32_relocation*byte_sequence)error=
(read_elf32_addr endian bs >>= (fun (r_offset, bs) ->
read_elf32_word endian bs >>= (fun (r_info, bs) ->
return ({ elf32_r_offset = r_offset; elf32_r_info = r_info }, bs))))
(** [read_elf64_relocation ed bs0] parses an [elf64_relocation] record from
* byte sequence [bs0] assuming endianness [ed]. The suffix of [bs0] remaining
* after parsing is also returned.
* Fails if the relocation record cannot be parsed.
*)
(*val read_elf64_relocation : endianness -> byte_sequence ->
error (elf64_relocation * byte_sequence)*)
let read_elf64_relocation endian bs:(elf64_relocation*byte_sequence)error=
(read_elf64_addr endian bs >>= (fun (r_offset, bs) ->
read_elf64_xword endian bs >>= (fun (r_info, bs) ->
return ({ elf64_r_offset = r_offset; elf64_r_info = r_info }, bs))))
(** [read_elf32_relocation_a ed bs0] parses an [elf32_relocation_a] record from
* byte sequence [bs0] assuming endianness [ed]. The suffix of [bs0] remaining
* after parsing is also returned.
* Fails if the relocation record cannot be parsed.
*)
(*val read_elf32_relocation_a : endianness -> byte_sequence ->
error (elf32_relocation_a * byte_sequence)*)
let read_elf32_relocation_a endian bs:(elf32_relocation_a*byte_sequence)error=
(read_elf32_addr endian bs >>= (fun (r_offset, bs) ->
read_elf32_word endian bs >>= (fun (r_info, bs) ->
read_elf32_sword endian bs >>= (fun (r_addend, bs) ->
return ({ elf32_ra_offset = r_offset; elf32_ra_info = r_info;
elf32_ra_addend = r_addend }, bs)))))
(** [read_elf64_relocation_a ed bs0] parses an [elf64_relocation_a] record from
* byte sequence [bs0] assuming endianness [ed]. The suffix of [bs0] remaining
* after parsing is also returned.
* Fails if the relocation record cannot be parsed.
*)
(*val read_elf64_relocation_a : endianness -> byte_sequence -> error (elf64_relocation_a * byte_sequence)*)
let read_elf64_relocation_a endian bs:(elf64_relocation_a*byte_sequence)error=
(read_elf64_addr endian bs >>= (fun (r_offset, bs) ->
read_elf64_xword endian bs >>= (fun (r_info, bs) ->
read_elf64_sxword endian bs >>= (fun (r_addend, bs) ->
return ({ elf64_ra_offset = r_offset; elf64_ra_info = r_info;
elf64_ra_addend = r_addend }, bs)))))
(** [read_elf32_relocation_section' ed bs0] parses a list of [elf32_relocation]
* records from byte sequence [bs0], which is assumed to have the exact size
* required, assuming endianness [ed].
* Fails if any of the records cannot be parsed.
*)
(*val read_elf32_relocation_section' : endianness -> byte_sequence ->
error (list elf32_relocation)*)
let rec read_elf32_relocation_section' endian bs0:((elf32_relocation)list)error=
(if Nat_big_num.equal (Byte_sequence.length0 bs0)(Nat_big_num.of_int 0) then
return []
else
read_elf32_relocation endian bs0 >>= (fun (entry, bs1) ->
read_elf32_relocation_section' endian bs1 >>= (fun tail ->
return (entry::tail))))
(** [read_elf64_relocation_section' ed bs0] parses a list of [elf64_relocation]
* records from byte sequence [bs0], which is assumed to have the exact size
* required, assuming endianness [ed].
* Fails if any of the records cannot be parsed.
*)
(*val read_elf64_relocation_section' : endianness -> byte_sequence ->
error (list elf64_relocation)*)
let rec read_elf64_relocation_section' endian bs0:((elf64_relocation)list)error=
(if Nat_big_num.equal (Byte_sequence.length0 bs0)(Nat_big_num.of_int 0) then
return []
else
read_elf64_relocation endian bs0 >>= (fun (entry, bs1) ->
read_elf64_relocation_section' endian bs1 >>= (fun tail ->
return (entry::tail))))
(** [read_elf32_relocation_a_section' ed bs0] parses a list of [elf32_relocation_a]
* records from byte sequence [bs0], which is assumed to have the exact size
* required, assuming endianness [ed].
* Fails if any of the records cannot be parsed.
*)
(*val read_elf32_relocation_a_section' : endianness -> byte_sequence ->
error (list elf32_relocation_a)*)
let rec read_elf32_relocation_a_section' endian bs0:((elf32_relocation_a)list)error=
(if Nat_big_num.equal (Byte_sequence.length0 bs0)(Nat_big_num.of_int 0) then
return []
else
read_elf32_relocation_a endian bs0 >>= (fun (entry, bs1) ->
read_elf32_relocation_a_section' endian bs1 >>= (fun tail ->
return (entry::tail))))
(** [read_elf64_relocation_a_section' ed bs0] parses a list of [elf64_relocation_a]
* records from byte sequence [bs0], which is assumed to have the exact size
* required, assuming endianness [ed].
* Fails if any of the records cannot be parsed.
*)
(*val read_elf64_relocation_a_section' : endianness -> byte_sequence ->
error (list elf64_relocation_a)*)
let rec read_elf64_relocation_a_section' endian bs0:((elf64_relocation_a)list)error=
(if Nat_big_num.equal (Byte_sequence.length0 bs0)(Nat_big_num.of_int 0) then
return []
else
read_elf64_relocation_a endian bs0 >>= (fun (entry, bs1) ->
read_elf64_relocation_a_section' endian bs1 >>= (fun tail ->
return (entry::tail))))
(** [read_elf32_relocation_section sz ed bs0] reads in a list of [elf32_relocation]
* records from a prefix of [bs0] of size [sz] assuming endianness [ed]. The
* suffix of [bs0] remaining after parsing is also returned.
* Fails if any of the records cannot be parsed or if the length of [bs0] is
* less than [sz].
*)
(*val read_elf32_relocation_section : natural -> endianness -> byte_sequence
-> error (list elf32_relocation * byte_sequence)*)
let read_elf32_relocation_section table_size endian bs0:((elf32_relocation)list*byte_sequence)error=
(partition0 table_size bs0 >>= (fun (eat, rest) ->
read_elf32_relocation_section' endian eat >>= (fun entries ->
return (entries, rest))))
(** [read_elf64_relocation_section sz ed bs0] reads in a list of [elf64_relocation]
* records from a prefix of [bs0] of size [sz] assuming endianness [ed]. The
* suffix of [bs0] remaining after parsing is also returned.
* Fails if any of the records cannot be parsed or if the length of [bs0] is
* less than [sz].
*)
(*val read_elf64_relocation_section : natural -> endianness -> byte_sequence
-> error (list elf64_relocation * byte_sequence)*)
let read_elf64_relocation_section table_size endian bs0:((elf64_relocation)list*byte_sequence)error=
(partition0 table_size bs0 >>= (fun (eat, rest) ->
read_elf64_relocation_section' endian eat >>= (fun entries ->
return (entries, rest))))
(** [read_elf32_relocation_a_section sz ed bs0] reads in a list of [elf32_relocation_a]
* records from a prefix of [bs0] of size [sz] assuming endianness [ed]. The
* suffix of [bs0] remaining after parsing is also returned.
* Fails if any of the records cannot be parsed or if the length of [bs0] is
* less than [sz].
*)
(*val read_elf32_relocation_a_section : natural -> endianness -> byte_sequence ->
error (list elf32_relocation_a * byte_sequence)*)
let read_elf32_relocation_a_section table_size endian bs0:((elf32_relocation_a)list*byte_sequence)error=
(partition0 table_size bs0 >>= (fun (eat, rest) ->
read_elf32_relocation_a_section' endian eat >>= (fun entries ->
return (entries, rest))))
(** [read_elf64_relocation_a_section sz ed bs0] reads in a list of [elf64_relocation_a]
* records from a prefix of [bs0] of size [sz] assuming endianness [ed]. The
* suffix of [bs0] remaining after parsing is also returned.
* Fails if any of the records cannot be parsed or if the length of [bs0] is
* less than [sz].
*)
(*val read_elf64_relocation_a_section : natural -> endianness -> byte_sequence ->
error (list elf64_relocation_a * byte_sequence)*)
let read_elf64_relocation_a_section table_size endian bs0:((elf64_relocation_a)list*byte_sequence)error=
(partition0 table_size bs0 >>= (fun (eat, rest) ->
read_elf64_relocation_a_section' endian eat >>= (fun entries ->
return (entries, rest))))
|
