1 #undef ADD_ROUTINE_PREFIX
2 #undef ADD_ROUTINE_SUFFIX
3
4 #if ELF_WRLOCK_HELD
5 #define CONCAT(x,y) x##y
6 #define ADD_ROUTINE_PREFIX(y) CONCAT(__,y)
7 #define ADD_ROUTINE_SUFFIX(x) x ## _wrlock
8 #define INTERNAL internal_function
9 #else
10 #define ADD_ROUTINE_PREFIX(y) y
11 #define ADD_ROUTINE_SUFFIX(x) x
12 #define INTERNAL
13 #endif
14
ElfW2(LIBELFBITS,Chdr)15 ElfW2(LIBELFBITS,Chdr) *
16 INTERNAL
17 ADD_ROUTINE_PREFIX(elfw2(LIBELFBITS, ADD_ROUTINE_SUFFIX(getchdr))) (Elf_Scn *scn)
18 {
19
20 ElfW2(LIBELFBITS,Shdr) *shdr = ADD_ROUTINE_PREFIX(elfw2(LIBELFBITS, ADD_ROUTINE_SUFFIX(getshdr)))(scn);
21
22 if (shdr == NULL)
23 return NULL;
24
25 /* Must have SHF_COMPRESSED flag set. Allocated or no bits sections
26 can never be compressed. */
27 if ((shdr->sh_flags & SHF_ALLOC) != 0)
28 {
29 __libelf_seterrno (ELF_E_INVALID_SECTION_FLAGS);
30 return NULL;
31 }
32
33 if (shdr->sh_type == SHT_NULL
34 || shdr->sh_type == SHT_NOBITS)
35 {
36 __libelf_seterrno (ELF_E_INVALID_SECTION_TYPE);
37 return NULL;
38 }
39
40 if ((shdr->sh_flags & SHF_COMPRESSED) == 0)
41 {
42 __libelf_seterrno (ELF_E_NOT_COMPRESSED);
43 return NULL;
44 }
45
46 /* This makes sure the data is in the correct format, so we don't
47 need to swap fields. */
48 Elf_Data *d = ADD_ROUTINE_PREFIX(ADD_ROUTINE_SUFFIX(elf_getdata)) (scn, NULL);
49 if (d == NULL)
50 return NULL;
51
52 if (d->d_size < sizeof (ElfW2(LIBELFBITS,Chdr)) || d->d_buf == NULL)
53 {
54 __libelf_seterrno (ELF_E_INVALID_DATA);
55 return NULL;
56 }
57
58 return (ElfW2(LIBELFBITS,Chdr) *) d->d_buf;
59 }
60 #undef INTERNAL
61 #undef ELF_WRLOCK_HELD