// ehframe.cc -- handle exception frame sections for gold
-// Copyright (C) 2006-2018 Free Software Foundation, Inc.
+// Copyright (C) 2006-2020 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.
+// Remove all post-map unwind information for a PLT.
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)
+ size_t cie_length)
{
+ if (!this->mappings_are_done_)
+ return;
+
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());
+ while (pcie->fde_count() != 0)
+ {
+ const Fde* fde = pcie->last_fde();
+ if (!fde->post_map(plt))
+ break;
+ size_t length = fde->length();
+ this->final_data_size_ -= align_address(length + 8, this->addralign());
+ pcie->remove_fde();
+ }
}
// Return the number of FDEs.