diff options
Diffstat (limited to 'gold/ehframe.cc')
| -rw-r--r-- | gold/ehframe.cc | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/gold/ehframe.cc b/gold/ehframe.cc index fd72a4f..61b5193 100644 --- a/gold/ehframe.cc +++ b/gold/ehframe.cc @@ -325,6 +325,21 @@ Eh_frame_hdr::get_fde_addresses(Output_file* of, // Class Fde. +bool +Fde::operator==(const Fde& that) const +{ + if (this->object_ != that.object_ + || this->contents_ != that.contents_) + return false; + if (this->object_ == NULL) + return (this->u_.from_linker.plt == that.u_.from_linker.plt + && this->u_.from_linker.post_map == that.u_.from_linker.post_map); + else + return (this->u_.from_object.shndx == that.u_.from_object.shndx + && (this->u_.from_object.input_offset + == that.u_.from_object.input_offset)); +} + // Write the FDE to OVIEW starting at OFFSET. CIE_OFFSET is the // offset of the CIE in OVIEW. OUTPUT_OFFSET is the offset of the // Eh_frame section within the output section. FDE_ENCODING is the @@ -443,6 +458,15 @@ Cie::set_output_offset(section_offset_type output_offset, return output_offset + length; } +// Remove FDE. Only the last FDE using this CIE may be removed. + +void +Cie::remove_fde(const Fde* fde) +{ + gold_assert(*fde == *this->fdes_.back()); + this->fdes_.pop_back(); +} + // Write the CIE to OVIEW starting at OFFSET. OUTPUT_OFFSET is the // offset of the Eh_frame section within the output section. Round up // the bytes to ADDRALIGN. ADDRESS is the virtual address of OVIEW. @@ -1143,6 +1167,28 @@ Eh_frame::add_ehframe_for_plt(Output_data* plt, const unsigned char* cie_data, this->final_data_size_ += align_address(fde_length + 8, this->addralign()); } +// Remove unwind information for a PLT. Only the last FDE added may be removed. + +void +Eh_frame::remove_ehframe_for_plt(Output_data* plt, + const unsigned char* cie_data, + size_t cie_length, + const unsigned char* fde_data, + size_t fde_length) +{ + Cie cie(NULL, 0, 0, elfcpp::DW_EH_PE_pcrel | elfcpp::DW_EH_PE_sdata4, "", + cie_data, cie_length); + Cie_offsets::iterator find_cie = this->cie_offsets_.find(&cie); + gold_assert (find_cie != this->cie_offsets_.end()); + Cie* pcie = *find_cie; + + Fde* fde = new Fde(plt, fde_data, fde_length, this->mappings_are_done_); + pcie->remove_fde(fde); + + if (this->mappings_are_done_) + this->final_data_size_ -= align_address(fde_length + 8, this->addralign()); +} + // Return the number of FDEs. unsigned int |