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Consolidate GOT creation in build_got_entries

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Currently GOT/PLT creation happens in two locations depending on whether
the GOT/PLT [entry] is required by the symbol or the relocation:

- bind_exe_dynsym for relocations to undefined symbol
- build_got_entries/put_got_entry for relocations that require a GOT/PLT
  entry

This commit consolidate GOT/PLT creation in build_got_entries by
reducing bind_exe_dynsym's job to create a dynamic symbol for undefined
symbols. build_got_entries then invoke put_got_entry if the symbol being
relocated is undefined or the relocation asks for a PLT or GOT [entry].
put_got_entry is also modified to only export a symbol in the dynamic
symbol table when we are in the case of PLT/GOT [entry] required by the
relocation (since undefined symbol are already exported by
bind_exe_dynsym).
This commit is contained in:
Thomas Preud'homme
2016-11-17 23:00:11 +00:00
parent 1c811a4d1d
commit a11b0a67e3
2 changed files with 25 additions and 17 deletions
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2
arm-link.c
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@ -13,7 +13,7 @@ ST_DATA struct reloc_info relocs_info[] = {
INIT_RELOC_INFO (R_ARM_THM_MOVT_ABS, 0, AUTO_GOTPLT_ENTRY, 0)
INIT_RELOC_INFO (R_ARM_THM_MOVW_ABS_NC, 0, AUTO_GOTPLT_ENTRY, 0)
INIT_RELOC_INFO (R_ARM_PREL31, 1, AUTO_GOTPLT_ENTRY, 0)
INIT_RELOC_INFO (R_ARM_ABS32, 0, NO_GOTPLT_ENTRY, 0)
INIT_RELOC_INFO (R_ARM_ABS32, 0, AUTO_GOTPLT_ENTRY, 0)
INIT_RELOC_INFO (R_ARM_REL32, 0, AUTO_GOTPLT_ENTRY, 0)
INIT_RELOC_INFO (R_ARM_GOTPC, 0, BUILD_GOT_ONLY, 0)
INIT_RELOC_INFO (R_ARM_GOTOFF, 0, BUILD_GOT_ONLY, 0)