From 7d1726872032004915cd16e53cc781af2adb2873 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Fri, 15 Jul 2011 15:31:54 +0000 Subject: * i386.cc (class Output_data_plt_i386): Add layout_ field. (Output_data_plt_i386::Output_data_plt_i386): Initialize layout_. (Output_data_plt_i386::do_write): Write address of .dynamic section to first entry in .got.plt section. * x86_64.cc (class Output_data_plt_x86_64): Add layout_ field. (Output_data_plt_x86_64::Output_data_plt_x86_64) [both versions]: Initialize layout_. (Output_data_plt_x86_64::do_write): Write address of .dynamic section to first entry in .got.plt section. * layout.h (Layout::dynamic_section): New function. --- gold/x86_64.cc | 28 ++++++++++++++++++++-------- 1 file changed, 20 insertions(+), 8 deletions(-) (limited to 'gold/x86_64.cc') diff --git a/gold/x86_64.cc b/gold/x86_64.cc index 4025527..e6b0021 100644 --- a/gold/x86_64.cc +++ b/gold/x86_64.cc @@ -57,9 +57,10 @@ class Output_data_plt_x86_64 : public Output_section_data Output_data_plt_x86_64(Layout* layout, Output_data_got<64, false>* got, Output_data_space* got_plt, Output_data_space* got_irelative) - : Output_section_data(16), tlsdesc_rel_(NULL), irelative_rel_(NULL), - got_(got), got_plt_(got_plt), got_irelative_(got_irelative), count_(0), - irelative_count_(0), tlsdesc_got_offset_(-1U), free_list_() + : Output_section_data(16), layout_(layout), tlsdesc_rel_(NULL), + irelative_rel_(NULL), got_(got), got_plt_(got_plt), + got_irelative_(got_irelative), count_(0), irelative_count_(0), + tlsdesc_got_offset_(-1U), free_list_() { this->init(layout); } Output_data_plt_x86_64(Layout* layout, Output_data_got<64, false>* got, @@ -67,9 +68,9 @@ class Output_data_plt_x86_64 : public Output_section_data Output_data_space* got_irelative, unsigned int plt_count) : Output_section_data((plt_count + 1) * plt_entry_size, 16, false), - tlsdesc_rel_(NULL), irelative_rel_(NULL), got_(got), got_plt_(got_plt), - got_irelative_(got_irelative), count_(plt_count), irelative_count_(0), - tlsdesc_got_offset_(-1U), free_list_() + layout_(layout), tlsdesc_rel_(NULL), irelative_rel_(NULL), got_(got), + got_plt_(got_plt), got_irelative_(got_irelative), count_(plt_count), + irelative_count_(0), tlsdesc_got_offset_(-1U), free_list_() { this->init(layout); @@ -205,6 +206,9 @@ class Output_data_plt_x86_64 : public Output_section_data void do_write(Output_file*); + // A pointer to the Layout class, so that we can find the .dynamic + // section when we write out the GOT PLT section. + Layout* layout_; // The reloc section. Reloc_section* rel_; // The TLSDESC relocs, if necessary. These must follow the regular @@ -1306,8 +1310,16 @@ Output_data_plt_x86_64::do_write(Output_file* of) unsigned char* got_pov = got_view; - memset(got_pov, 0, 24); - got_pov += 24; + // The first entry in the GOT is the address of the .dynamic section + // aka the PT_DYNAMIC segment. The next two entries are reserved. + // We saved space for them when we created the section in + // Target_x86_64::got_section. + Output_section* dynamic = this->layout_->dynamic_section(); + uint32_t dynamic_addr = dynamic == NULL ? 0 : dynamic->address(); + elfcpp::Swap<64, false>::writeval(got_pov, dynamic_addr); + got_pov += 8; + memset(got_pov, 0, 16); + got_pov += 16; unsigned int plt_offset = plt_entry_size; unsigned int got_offset = 24; -- cgit v1.1