nsz Git - musl/blob - arch/x86_64/reloc.h

   1 #include <stdint.h>
   2 #include <string.h>
   3 #include <elf.h>
   4
   5 #define ETC_LDSO_PATH "/etc/ld-musl-x86_64.path"
   6
   7 #define IS_COPY(x) ((x)==R_X86_64_COPY)
   8 #define IS_PLT(x) ((x)==R_X86_64_JUMP_SLOT)
   9
  10 static inline void do_single_reloc(
  11         struct dso *self, unsigned char *base_addr,
  12         size_t *reloc_addr, int type, size_t addend,
  13         Sym *sym, size_t sym_size,
  14         struct symdef def, size_t sym_val)
  15 {
  16         switch(type) {
  17         case R_X86_64_GLOB_DAT:
  18         case R_X86_64_JUMP_SLOT:
  19         case R_X86_64_64:
  20                 *reloc_addr = sym_val + addend;
  21                 break;
  22         case R_X86_64_32:
  23                 *(uint32_t *)reloc_addr = sym_val + addend;
  24                 break;
  25         case R_X86_64_PC32:
  26                 *reloc_addr = sym_val + addend - (size_t)reloc_addr + (size_t)base_addr;
  27                 break;
  28         case R_X86_64_RELATIVE:
  29                 *reloc_addr = (size_t)base_addr + addend;
  30                 break;
  31         case R_X86_64_COPY:
  32                 memcpy(reloc_addr, (void *)sym_val, sym_size);
  33                 break;
  34         case R_X86_64_TLS_DTPMOD64:
  35                 *reloc_addr = def.dso ? def.dso->tls_id : self->tls_id;
  36                 break;
  37         case R_X86_64_TLS_DTPOFF64:
  38                 *reloc_addr = def.sym->st_value + addend;
  39                 break;
  40         case R_X86_64_TLS_TPOFF64:
  41                 *reloc_addr = (def.sym
  42                         ? def.sym->st_value - def.dso->tls_offset
  43                         : 0 - self->tls_offset) + addend;
  44                 break;
  45         }
  46 }