[efi] Do not raise TPL within EFI_DRIVER_BINDING_PROTOCOL.Supported()
[ipxe.git] / src / util / iccfix.c
1 #include <stdint.h>
2 #include <stddef.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <string.h>
6 #include <unistd.h>
7 #include <fcntl.h>
8 #include <errno.h>
9 #include <sys/types.h>
10 #include <sys/stat.h>
11 #include <sys/mman.h>
12 #include <elf.h>
13 #include <ipxe/tables.h>
14
15 #define DEBUG 0
16
17 #define eprintf(...) fprintf ( stderr, __VA_ARGS__ )
18
19 #define dprintf(...) do { \
20 if ( DEBUG ) \
21 fprintf ( stderr, __VA_ARGS__ ); \
22 } while ( 0 )
23
24 #ifdef SELF_INCLUDED
25
26 /**
27 * Fix up ICC alignments
28 *
29 * @v elf ELF header
30 * @ret rc Return status code
31 *
32 * See comments in tables.h for an explanation of why this monstrosity
33 * is necessary.
34 */
35 static int ICCFIX ( void *elf ) {
36 ELF_EHDR *ehdr = elf;
37 ELF_SHDR *shdr = ( elf + ehdr->e_shoff );
38 size_t shentsize = ehdr->e_shentsize;
39 unsigned int shnum = ehdr->e_shnum;
40 ELF_SHDR *strtab = ( ( ( void * ) shdr ) +
41 ( ehdr->e_shstrndx * shentsize ) );
42 char *strings = ( elf + strtab->sh_offset );
43
44 for ( ; shnum-- ; shdr = ( ( ( void * ) shdr ) + shentsize ) ) {
45 char *name = ( strings + shdr->sh_name );
46 unsigned long align = shdr->sh_addralign;
47 unsigned long new_align;
48
49 if ( ( strncmp ( name, ".tbl.", 5 ) == 0 ) &&
50 ( align >= ICC_ALIGN_HACK_FACTOR ) ) {
51 new_align = ( align / ICC_ALIGN_HACK_FACTOR );
52 shdr->sh_addralign = new_align;
53 dprintf ( "Section \"%s\": alignment %ld->%ld\n",
54 name, align, new_align );
55 }
56 }
57 return 0;
58 }
59
60 #else /* SELF_INCLUDED */
61
62 #define SELF_INCLUDED
63
64 /* Include iccfix32() function */
65 #define ELF_EHDR Elf32_Ehdr
66 #define ELF_SHDR Elf32_Shdr
67 #define ICCFIX iccfix32
68 #include "iccfix.c"
69 #undef ELF_EHDR
70 #undef ELF_SHDR
71 #undef ICCFIX
72
73 /* Include iccfix64() function */
74 #define ELF_EHDR Elf64_Ehdr
75 #define ELF_SHDR Elf64_Shdr
76 #define ICCFIX iccfix64
77 #include "iccfix.c"
78 #undef ELF_EHDR
79 #undef ELF_SHDR
80 #undef ICCFIX
81
82 static int iccfix ( const char *filename ) {
83 int fd;
84 struct stat stat;
85 void *elf;
86 unsigned char *eident;
87 int rc;
88
89 /* Open and mmap file */
90 fd = open ( filename, O_RDWR );
91 if ( fd < 0 ) {
92 eprintf ( "Could not open %s: %s\n",
93 filename, strerror ( errno ) );
94 rc = -1;
95 goto err_open;
96 }
97 if ( fstat ( fd, &stat ) < 0 ) {
98 eprintf ( "Could not determine size of %s: %s\n",
99 filename, strerror ( errno ) );
100 rc = -1;
101 goto err_fstat;
102 }
103 elf = mmap ( NULL, stat.st_size, ( PROT_READ | PROT_WRITE ),
104 MAP_SHARED, fd, 0 );
105 if ( elf == MAP_FAILED ) {
106 eprintf ( "Could not map %s: %s\n",
107 filename, strerror ( errno ) );
108 rc = -1;
109 goto err_mmap;
110 }
111
112 /* Perform fixups */
113 eident = elf;
114 switch ( eident[EI_CLASS] ) {
115 case ELFCLASS32:
116 rc = iccfix32 ( elf );
117 break;
118 case ELFCLASS64:
119 rc = iccfix64 ( elf );
120 break;
121 default:
122 eprintf ( "Unknown ELF class %d in %s\n",
123 eident[EI_CLASS], filename );
124 rc = -1;
125 break;
126 }
127
128 munmap ( elf, stat.st_size );
129 err_mmap:
130 err_fstat:
131 close ( fd );
132 err_open:
133 return rc;
134 }
135
136 int main ( int argc, char **argv ) {
137 int i;
138 int rc;
139
140 /* Parse command line */
141 if ( argc < 2 ) {
142 eprintf ( "Syntax: %s <object_file>...\n", argv[0] );
143 exit ( 1 );
144 }
145
146 /* Process each object in turn */
147 for ( i = 1 ; i < argc ; i++ ) {
148 if ( ( rc = iccfix ( argv[i] ) ) != 0 ) {
149 eprintf ( "Could not fix up %s\n", argv[i] );
150 exit ( 1 );
151 }
152 }
153
154 return 0;
155 }
156
157 #endif /* SELF_INCLUDED */