diff options
Diffstat (limited to 'gold/output.h')
| -rw-r--r-- | gold/output.h | 83 |
1 files changed, 71 insertions, 12 deletions
diff --git a/gold/output.h b/gold/output.h index 0d88294..d62ae73 100644 --- a/gold/output.h +++ b/gold/output.h @@ -81,6 +81,11 @@ class Output_data return this->data_size_; } + // Get the current data size. + off_t + current_data_size() const + { return this->current_data_size_for_child(); } + // Return true if data size is fixed. bool is_data_size_fixed() const @@ -193,6 +198,17 @@ class Output_data this->is_offset_valid_ = true; } + // Update the data size without finalizing it. + void + pre_finalize_data_size() + { + if (!this->is_data_size_valid_) + { + // Tell the child class to update the data size. + this->update_data_size(); + } + } + // Finalize the data size. void finalize_data_size() @@ -320,6 +336,17 @@ class Output_data do_set_out_shndx(unsigned int) { gold_unreachable(); } + // This is a hook for derived classes to set the preliminary data size. + // This is called by pre_finalize_data_size, normally called during + // Layout::finalize, before the section address is set, and is used + // during an incremental update, when we need to know the size of a + // section before allocating space in the output file. For classes + // where the current data size is up to date, this default version of + // the method can be inherited. + virtual void + update_data_size() + { } + // This is a hook for derived classes to set the data size. This is // called by finalize_data_size, normally called during // Layout::finalize, when the section address is set. @@ -462,6 +489,11 @@ class Output_section_headers : public Output_data do_print_to_mapfile(Mapfile* mapfile) const { mapfile->print_output_data(this, _("** section headers")); } + // Update the data size. + void + update_data_size() + { this->set_data_size(this->do_size()); } + // Set final data size. void set_final_data_size() @@ -732,11 +764,6 @@ class Output_section_data_build : public Output_section_data : Output_section_data(addralign) { } - // Get the current data size. - off_t - current_data_size() const - { return this->current_data_size_for_child(); } - // Set the current data size. void set_current_data_size(off_t data_size) @@ -918,6 +945,12 @@ class Output_data_strtab : public Output_section_data { } protected: + // This is called to update the section size prior to assigning + // the address and file offset. + void + update_data_size() + { this->set_final_data_size(); } + // This is called to set the address and file offset. Here we make // sure that the Stringpool is finalized. void @@ -3035,6 +3068,10 @@ class Output_section : public Output_data } } + // Return the current required size, without finalization. + off_t + current_data_size() const; + // Return the required size. off_t data_size() const; @@ -3258,11 +3295,6 @@ class Output_section : public Output_data set_current_data_size(off_t size) { this->set_current_data_size_for_child(size); } - // Get the current size of the output section. - off_t - current_data_size() const - { return this->current_data_size_for_child(); } - // End of linker script support. // Save states before doing section layout. @@ -3317,6 +3349,21 @@ class Output_section : public Output_data void print_merge_stats(); + // Set a fixed layout for the section. Used for incremental update links. + void + set_fixed_layout(uint64_t sh_addr, off_t sh_offset, off_t sh_size, + uint64_t sh_addralign); + + // Return TRUE if the section has a fixed layout. + bool + has_fixed_layout() const + { return this->has_fixed_layout_; } + + // Reserve space within the fixed layout for the section. Used for + // incremental update links. + void + reserve(uint64_t sh_offset, uint64_t sh_size); + protected: // Return the output section--i.e., the object itself. Output_section* @@ -3343,6 +3390,13 @@ class Output_section : public Output_data this->out_shndx_ = shndx; } + // Update the data size of the Output_section. For a typical + // Output_section, there is nothing to do, but if there are any + // Output_section_data objects we need to do a trial layout + // here. + virtual void + update_data_size(); + // Set the final data size of the Output_section. For a typical // Output_section, there is nothing to do, but if there are any // Output_section_data objects we need to set their final addresses @@ -3761,6 +3815,8 @@ class Output_section : public Output_data bool is_noload_ : 1; // Whether this always keeps input section. bool always_keeps_input_sections_ : 1; + // Whether this section has a fixed layout, for incremental update links. + bool has_fixed_layout_ : 1; // For SHT_TLS sections, the offset of this section relative to the base // of the TLS segment. uint64_t tls_offset_; @@ -3768,6 +3824,9 @@ class Output_section : public Output_data Checkpoint_output_section* checkpoint_; // Fast lookup maps for merged and relaxed input sections. Output_section_lookup_maps* lookup_maps_; + // List of available regions within the section, for incremental + // update links. + Free_list free_list_; }; // An output segment. PT_LOAD segments are built from collections of @@ -3910,7 +3969,7 @@ class Output_segment // address of the immediately following segment. Update *POFF and // *PSHNDX. This should only be called for a PT_LOAD segment. uint64_t - set_section_addresses(const Layout*, bool reset, uint64_t addr, + set_section_addresses(Layout*, bool reset, uint64_t addr, unsigned int* increase_relro, bool* has_relro, off_t* poff, unsigned int* pshndx); @@ -3970,7 +4029,7 @@ class Output_segment // Set the section addresses in an Output_data_list. uint64_t - set_section_list_addresses(const Layout*, bool reset, Output_data_list*, + set_section_list_addresses(Layout*, bool reset, Output_data_list*, uint64_t addr, off_t* poff, unsigned int* pshndx, bool* in_tls); |