diff options
Diffstat (limited to 'ldso/include/dl-elf.h')
| -rw-r--r-- | ldso/include/dl-elf.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/ldso/include/dl-elf.h b/ldso/include/dl-elf.h index 2b99958d9..832f6b1dd 100644 --- a/ldso/include/dl-elf.h +++ b/ldso/include/dl-elf.h @@ -250,5 +250,46 @@ unsigned int __dl_parse_dynamic_info(ElfW(Dyn) *dpnt, unsigned long dynamic_info (((X) & PF_W) ? PROT_WRITE : 0) | \ (((X) & PF_X) ? PROT_EXEC : 0)) +/* FDPIC ABI don't use relative relocations */ +#if !defined(__FDPIC__) +/* Apply relocations in DT_RELR format */ +#define DL_DO_RELOCATE_RELR(load_addr, relr_start, relr_end) \ + do { \ + const ElfW(Relr) *relr = 0; \ + ElfW(Addr) *relr_reloc_addr = 0; \ + for (relr = relr_start; relr < relr_end; relr++) { \ + ElfW(Relr) relr_entry = *relr; \ + if (!(relr_entry & 1)) \ + { \ + relr_reloc_addr = (ElfW(Addr) *)DL_RELOC_ADDR(load_addr, relr_entry); \ + *relr_reloc_addr = (ElfW(Addr))DL_RELOC_ADDR(load_addr, relr_reloc_addr); \ + relr_reloc_addr++; \ + } \ + else \ + { \ + for (long int i = 0; (relr_entry >>= 1) != 0; ++i) { \ + if ((relr_entry & 1) != 0) \ + relr_reloc_addr[i] = (ElfW(Addr))DL_RELOC_ADDR(load_addr, relr_reloc_addr[i]); \ + } \ + relr_reloc_addr += CHAR_BIT * sizeof(ElfW(Relr)) - 1; \ + } \ + } \ + } while (0) + +/* The macro to prepare data for the above DL_DO_RELOCATE_RELR */ +#define DL_RELOCATE_RELR(dyn) \ + do { \ + if (dyn->dynamic_info[DT_RELRENT]) \ + _dl_assert(dyn->dynamic_info[DT_RELRENT] == sizeof(ElfW(Relr))); \ + if (dyn->dynamic_info[DT_RELR] && \ + dyn->dynamic_info[DT_RELRSZ]) { \ + ElfW(Relr) *relr_start = (ElfW(Relr) *)((ElfW(Addr))dyn->loadaddr + (ElfW(Addr))dyn->dynamic_info[DT_RELR]); \ + ElfW(Relr) *relr_end = (ElfW(Relr) *)((const char *)relr_start + dyn->dynamic_info[DT_RELRSZ]); \ + _dl_if_debug_dprint("Relocating DT_RELR in %s: start:%p, end:%p\n", \ + dyn->libname, (void *)relr_start, (void *)relr_end); \ + DL_DO_RELOCATE_RELR(dyn->loadaddr, relr_start, relr_end); \ + } \ + } while (0) +#endif /* __FDPIC__ */ #endif /* _DL_ELF_H */ |