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
|
/*
* Copyright (C)2015-2017 Haxe Foundation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "neko_elf.h"
static value elf_update_section_header_for_bytecode(value _file, value _interp_size, value _bytecode_size)
{
/* This function is a no-op on non-ELF platforms... */
#ifdef SEPARATE_SECTION_FOR_BYTECODE
FILE *exe;
int interp_size, bytecode_size;
char buf[size_Shdr], *file;
int bytecode_sec_idx;
val_check(_file,string);
val_check(_interp_size,int);
val_check(_bytecode_size,int);
file = val_string(_file);
interp_size = val_int(_interp_size);
bytecode_size = val_int(_bytecode_size);
if ( interp_size%4 != 0 ) {
return val_false;
}
/* Open the file to update the elf nekobytecode section
header... */
exe = fopen(file,"r+b");
if( exe == NULL )
return val_false;
/* First read the elf header... */
if ( val_true != elf_read_header(exe) ) goto failed;
/* Find the right section header... */
bytecode_sec_idx = elf_find_bytecode_section(exe);
if ( -1 == bytecode_sec_idx ) goto failed;
/* Now that we have the right section header, update it... */
if ( val_true != elf_read_section(exe,bytecode_sec_idx,buf) ) goto failed;
elf_set_Shdr(buf,sh_type,SHT_PROGBITS);
elf_set_Shdr(buf,sh_flags,elf_get_Shdr(buf,sh_flags) & (SHF_MASKOS|SHF_MASKPROC));
elf_set_Shdr(buf,sh_addr,0);
elf_set_Shdr(buf,sh_offset,interp_size);
elf_set_Shdr(buf,sh_size,bytecode_size);
elf_set_Shdr(buf,sh_addralign,1);
elf_set_Shdr(buf,sh_entsize,0);
/* ...and write it back... */
if ( val_true != elf_write_section(exe,bytecode_sec_idx,buf) ) goto failed;
elf_free_section_string_table();
fclose(exe);
return val_true;
failed:
elf_free_section_string_table();
fclose(exe);
return val_false;
#else
return val_true;
#endif
}
DEFINE_PRIM(elf_update_section_header_for_bytecode,3);
|
