1 #ifndef COMMON_H
2 #define COMMON_H
3
4 #include <libelf.h>
5 #include <elf.h>
6
7 #define unlikely(expr) __builtin_expect (expr, 0)
8 #define likely(expr) __builtin_expect (expr, 1)
9
10 #define MIN(a,b) ((a)<(b)?(a):(b)) /* no side effects in arguments allowed! */
11
12 typedef int (*section_match_fn_t)(Elf *, Elf_Scn *, void *);
13 void map_over_sections(Elf *, section_match_fn_t, void *);
14
15 typedef int (*segment_match_fn_t)(Elf *, Elf32_Phdr *, void *);
16 void map_over_segments(Elf *, segment_match_fn_t, void *);
17
18 typedef struct {
19 Elf_Scn *sect;
20 Elf32_Shdr *hdr;
21 Elf_Data *data;
22 size_t index;
23 } section_info_t;
24
get_section_info(Elf_Scn * sect,section_info_t * info)25 static inline void get_section_info(Elf_Scn *sect, section_info_t *info)
26 {
27 info->sect = sect;
28 info->data = elf_getdata(sect, 0);
29 info->hdr = elf32_getshdr(sect);
30 info->index = elf_ndxscn(sect);
31 }
32
is_host_little(void)33 static inline int is_host_little(void)
34 {
35 short val = 0x10;
36 return ((char *)&val)[0] != 0;
37 }
38
switch_endianness(long val)39 static inline long switch_endianness(long val)
40 {
41 long newval;
42 ((char *)&newval)[3] = ((char *)&val)[0];
43 ((char *)&newval)[2] = ((char *)&val)[1];
44 ((char *)&newval)[1] = ((char *)&val)[2];
45 ((char *)&newval)[0] = ((char *)&val)[3];
46 return newval;
47 }
48
49 #endif/*COMMON_H*/
50