// ehframe.cc -- handle exception frame sections for gold
-// Copyright (C) 2006-2017 Free Software Foundation, Inc.
+// Copyright (C) 2006-2019 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// 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
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.
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