|
1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
|
2 // All rights reserved. |
|
3 // This component and the accompanying materials are made available |
|
4 // under the terms of "Eclipse Public License v1.0" |
|
5 // which accompanies this distribution, and is available |
|
6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
7 // |
|
8 // Initial Contributors: |
|
9 // Nokia Corporation - initial contribution. |
|
10 // |
|
11 // Contributors: |
|
12 // |
|
13 // Description: |
|
14 // |
|
15 |
|
16 #include <stdio.h> |
|
17 #include <string.h> |
|
18 #include <stdlib.h> |
|
19 |
|
20 #include <tools/elfdefs.h> |
|
21 |
|
22 #define ADDR(rtype, p, o) (rtype *)(((char *)p) + o) |
|
23 |
|
24 void croak(char * s) |
|
25 { |
|
26 printf("GETDIRECTIVE ERROR: %s\n", s); |
|
27 exit(EXIT_FAILURE); |
|
28 } |
|
29 |
|
30 void croak2(char * s1, char * s2) |
|
31 { |
|
32 printf("GETDIRECTIVE ERROR: %s %s\n", s1, s2); |
|
33 exit(EXIT_FAILURE); |
|
34 } |
|
35 |
|
36 int GetFileSize(FILE * f, char * file) |
|
37 { |
|
38 int r = fseek(f, 0, SEEK_END); |
|
39 if (r) croak2("can't seek to end of file:", file); |
|
40 r = ftell(f); |
|
41 rewind(f); |
|
42 return r; |
|
43 } |
|
44 |
|
45 void EnsureElf(Elf32_Ehdr* ef) |
|
46 { |
|
47 // Do nothing for now |
|
48 (void)ef; |
|
49 } |
|
50 |
|
51 Elf32_Ehdr* OpenElfFile (char* file) |
|
52 { |
|
53 Elf32_Ehdr* eh; |
|
54 FILE* f = fopen(file, "rb"); |
|
55 if (!f) |
|
56 croak2("can't open file:", file); |
|
57 |
|
58 int fsize = GetFileSize(f, file); |
|
59 |
|
60 eh = (Elf32_Ehdr*)malloc(fsize); |
|
61 if (!eh) |
|
62 croak("Out of memory"); |
|
63 |
|
64 if (fread(eh, fsize, 1, f) != 1) |
|
65 croak2("Can't read file", file); |
|
66 |
|
67 EnsureElf(eh); |
|
68 |
|
69 return eh; |
|
70 } |
|
71 |
|
72 void PrintDirectiveSections (Elf32_Ehdr * eh) |
|
73 { |
|
74 int shoff = eh->e_shoff; // offset of section header table |
|
75 if (shoff) { |
|
76 Elf32_Shdr * shdr = ADDR(Elf32_Shdr, eh, shoff); |
|
77 |
|
78 int shnum = eh->e_shnum; // number of section headers |
|
79 |
|
80 // e_shnum will be 0 if the number of sections is >= SHN_LORESERVE (0xff00) |
|
81 // If this is the case, sh_size contains the actual number of section headers. |
|
82 // If sh_size is 0, there really aren't any section headers. |
|
83 if (!shnum) |
|
84 shnum = shdr->sh_size; |
|
85 |
|
86 int shstrndx = eh->e_shstrndx; |
|
87 |
|
88 // If the section name string table index is >= SHN_LORESERVE (0xff00), shstrndx |
|
89 // contains SHN_XINDEX (0xffff). |
|
90 // If this is the case, sh_link contains the actual index of the section name string |
|
91 // table, otherwise sh_link is 0. |
|
92 |
|
93 if (shstrndx >= 65535) |
|
94 shstrndx = shdr->sh_link; |
|
95 |
|
96 int snameoffset = shdr[shstrndx].sh_offset; // offset in file of sections' names |
|
97 char * sname = ADDR(char, eh, snameoffset); |
|
98 for (int i = 0; i < shnum; i++) { |
|
99 if (i != shstrndx) { |
|
100 if (!strcmp(".directive", &sname[shdr[i].sh_name])) { |
|
101 // we're in business. print the section to stdout |
|
102 char * data = ADDR(char, eh, shdr[i].sh_offset); |
|
103 int size = shdr[i].sh_size; |
|
104 fwrite(data, size, 1, stdout); |
|
105 printf("\n"); |
|
106 } |
|
107 } |
|
108 } |
|
109 } |
|
110 } |
|
111 |
|
112 int main(int argc, char** argv) |
|
113 { |
|
114 (void)argc; |
|
115 char* file = argv[1]; |
|
116 PrintDirectiveSections(OpenElfFile(file)); |
|
117 |
|
118 return EXIT_SUCCESS; |
|
119 } |
|
120 |
|
121 |
|
122 |
|
123 |
|
124 |
|
125 |