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| author | H.J. Lu <hjl.tools@gmail.com> | 2014-11-18 11:34:11 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2014-11-21 11:26:56 -0800 |
| commit | 9d585188889de38c7191976051d9acdd8d57cbbf (patch) | |
| tree | 026f45f0a5ba574df76a3fbcda0898e1f81c887d /gold/x86_64.cc | |
| parent | b2a919a82b1d131c20f9e9c21b8c4871e5622d75 (diff) | |
| download | gdb-9d585188889de38c7191976051d9acdd8d57cbbf.zip gdb-9d585188889de38c7191976051d9acdd8d57cbbf.tar.gz gdb-9d585188889de38c7191976051d9acdd8d57cbbf.tar.bz2 | |
Check PC-relative offset overflow in PLT entry
PR gold/17619
* x86_64.cc (Output_data_plt_x86_64_standard<size>::do_fill_plt_entry):
Check PC-relative offset overflow in PLT entry.
Diffstat (limited to 'gold/x86_64.cc')
| -rw-r--r-- | gold/x86_64.cc | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/gold/x86_64.cc b/gold/x86_64.cc index 1fb601d..4baa2bf 100644 --- a/gold/x86_64.cc +++ b/gold/x86_64.cc @@ -1516,11 +1516,16 @@ Output_data_plt_x86_64_standard<size>::do_fill_plt_entry( unsigned int plt_offset, unsigned int plt_index) { + // Check PC-relative offset overflow in PLT entry. + uint64_t plt_got_pcrel_offset = (got_address + got_offset + - (plt_address + plt_offset + 6)); + if (Bits<32>::has_overflow(plt_got_pcrel_offset)) + gold_error(_("PC-relative offset overflow in PLT entry %d"), + plt_index + 1); + memcpy(pov, plt_entry, plt_entry_size); elfcpp::Swap_unaligned<32, false>::writeval(pov + 2, - (got_address + got_offset - - (plt_address + plt_offset - + 6))); + plt_got_pcrel_offset); elfcpp::Swap_unaligned<32, false>::writeval(pov + 7, plt_index); elfcpp::Swap<32, false>::writeval(pov + 12, |