[Elftoolchain-developers] what is the meaning of ELF64_R_SYM(rela.r_info) ?

[Daniel W. <dan...@gm...>]

If I have a Elf64_Rela and I call ELF64_R_SYM on its r_info field,
what is the meaning of the number that I get back?  I'm getting
numbers too large to be an index into a symbol table.

Daniel

      Elf64_Rela const rela = ...;
      // from elftoolchain/common/elfdefinitions.h:
      // typedef struct {
      //   Elf64_Addr   r_offset;    /* location to apply relocation to */
      //   Elf64_Xword  r_info;      /* type+section for relocation */
      //   Elf64_Sxword r_addend;    /* constant addend */
      // } Elf64_Rela;
      int const sym = ELF64_R_SYM(rela.r_info);