static Elf_Ehdr ehdr;
static unsigned long shnum;
static unsigned int shstrndx;
+static unsigned int shsymtabndx;
+static unsigned int shxsymtabndx;
+
+static int sym_index(Elf_Sym *sym);
struct relocs {
uint32_t *offset;
Elf_Shdr shdr;
struct section *link;
Elf_Sym *symtab;
+ Elf32_Word *xsymtab;
Elf_Rel *reltab;
char *strtab;
};
name = sym_strtab + sym->st_name;
}
else {
- name = sec_name(sym->st_shndx);
+ name = sec_name(sym_index(sym));
}
return name;
}
#define elf_xword_to_cpu(x) elf32_to_cpu(x)
#endif
+static int sym_index(Elf_Sym *sym)
+{
+ Elf_Sym *symtab = secs[shsymtabndx].symtab;
+ Elf32_Word *xsymtab = secs[shxsymtabndx].xsymtab;
+ unsigned long offset;
+ int index;
+
+ if (sym->st_shndx != SHN_XINDEX)
+ return sym->st_shndx;
+
+ /* calculate offset of sym from head of table. */
+ offset = (unsigned long)sym - (unsigned long)symtab;
+ index = offset / sizeof(*sym);
+
+ return elf32_to_cpu(xsymtab[index]);
+}
+
static void read_ehdr(FILE *fp)
{
if (fread(&ehdr, sizeof(ehdr), 1, fp) != 1) {
static void read_symtabs(FILE *fp)
{
int i,j;
+
for (i = 0; i < shnum; i++) {
struct section *sec = &secs[i];
- if (sec->shdr.sh_type != SHT_SYMTAB) {
+ int num_syms;
+
+ switch (sec->shdr.sh_type) {
+ case SHT_SYMTAB_SHNDX:
+ sec->xsymtab = malloc(sec->shdr.sh_size);
+ if (!sec->xsymtab) {
+ die("malloc of %" FMT " bytes for xsymtab failed\n",
+ sec->shdr.sh_size);
+ }
+ if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
+ die("Seek to %" FMT " failed: %s\n",
+ sec->shdr.sh_offset, strerror(errno));
+ }
+ if (fread(sec->xsymtab, 1, sec->shdr.sh_size, fp)
+ != sec->shdr.sh_size) {
+ die("Cannot read extended symbol table: %s\n",
+ strerror(errno));
+ }
+ shxsymtabndx = i;
+ continue;
+
+ case SHT_SYMTAB:
+ num_syms = sec->shdr.sh_size / sizeof(Elf_Sym);
+
+ sec->symtab = malloc(sec->shdr.sh_size);
+ if (!sec->symtab) {
+ die("malloc of %" FMT " bytes for symtab failed\n",
+ sec->shdr.sh_size);
+ }
+ if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
+ die("Seek to %" FMT " failed: %s\n",
+ sec->shdr.sh_offset, strerror(errno));
+ }
+ if (fread(sec->symtab, 1, sec->shdr.sh_size, fp)
+ != sec->shdr.sh_size) {
+ die("Cannot read symbol table: %s\n",
+ strerror(errno));
+ }
+ for (j = 0; j < num_syms; j++) {
+ Elf_Sym *sym = &sec->symtab[j];
+
+ sym->st_name = elf_word_to_cpu(sym->st_name);
+ sym->st_value = elf_addr_to_cpu(sym->st_value);
+ sym->st_size = elf_xword_to_cpu(sym->st_size);
+ sym->st_shndx = elf_half_to_cpu(sym->st_shndx);
+ }
+ shsymtabndx = i;
+ continue;
+
+ default:
continue;
- }
- sec->symtab = malloc(sec->shdr.sh_size);
- if (!sec->symtab) {
- die("malloc of %" FMT " bytes for symtab failed\n",
- sec->shdr.sh_size);
- }
- if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
- die("Seek to %" FMT " failed: %s\n",
- sec->shdr.sh_offset, strerror(errno));
- }
- if (fread(sec->symtab, 1, sec->shdr.sh_size, fp)
- != sec->shdr.sh_size) {
- die("Cannot read symbol table: %s\n",
- strerror(errno));
- }
- for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Sym); j++) {
- Elf_Sym *sym = &sec->symtab[j];
- sym->st_name = elf_word_to_cpu(sym->st_name);
- sym->st_value = elf_addr_to_cpu(sym->st_value);
- sym->st_size = elf_xword_to_cpu(sym->st_size);
- sym->st_shndx = elf_half_to_cpu(sym->st_shndx);
}
}
}
*/
static int is_percpu_sym(ElfW(Sym) *sym, const char *symname)
{
- return (sym->st_shndx == per_cpu_shndx) &&
+ int shndx = sym_index(sym);
+
+ return (shndx == per_cpu_shndx) &&
strcmp(symname, "__init_begin") &&
strcmp(symname, "__per_cpu_load") &&
strncmp(symname, "init_per_cpu_", 13);
sec_name(sec->shdr.sh_info),
rel_type(ELF_R_TYPE(rel->r_info)),
symname,
- sec_name(sym->st_shndx));
+ sec_name(sym_index(sym)));
return 0;
}