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authorIan Lance Taylor <ian@airs.com>2009-10-06 22:58:27 +0000
committerIan Lance Taylor <ian@airs.com>2009-10-06 22:58:27 +0000
commit364c7fa5c98a7e2d75fe33ecb1ec4f7260849731 (patch)
tree2cfca9a55836527ac65fea760844754fe93f01a9 /gold/target.h
parent5aafa1cc49c9a87aeb3e0aeaede8155fdf9f1645 (diff)
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* options.h (class General_options): Define
split_stack_adjust_size parameter. * object.h (class Object): Add uses_split_stack_ and has_no_split_stack_ fields. Add uses_split_stack and has_no_split_stack accessor functions. Declare handle_split_stack_section. (class Reloc_symbol_changes): Define. (class Sized_relobj): Define Function_offsets. Declare split_stack_adjust, split_stack_adjust_reltype, and find_functions. * object.cc (Object::handle_split_stack_section): New function. (Sized_relobj::do_layout): Call handle_split_stack_section. * dynobj.cc (Sized_dynobj::do_layout): Call handle_split_stack_section. * reloc.cc (Sized_relobj::relocate_sections): Call split_stack_adjust for executable sections in split_stack objects. Pass reloc_map to relocate_section. (Sized_relobj::split_stack_adjust): New function. (Sized_relobj::split_stack_adjust_reltype): New function. (Sized_relobj::find_functions): New function. * target-reloc.h: Include "object.h". (relocate_section): Add reloc_symbol_changes parameter. Change all callers. * target.h (class Target): Add calls_non_split method. Declare do_calls_non_split virtual method. Declare match_view and set_view_to_nop. * target.cc: Include "elfcpp.h". (Target::do_calls_non_split): New function. (Target::match_view): New function. (Target::set_view_to_nop): New function. * gold.cc (queue_middle_tasks): Give an error if mixing split-stack and non-split-stack objects with -r. * i386.cc (Target_i386::relocate_section): Add reloc_symbol_changes parameter. (Target_i386::do_calls_non_split): New function. * x86_64.cc (Target_x86_64::relocate_section): Add reloc_symbol_changes parameter. (Target_x86_64::do_calls_non_split): New function. * arm.cc (Target_arm::relocate_section): Add reloc_symbol_changes parameter. * powerpc.cc (Target_powerpc::relocate_section): Add reloc_symbol_changes parameter. * sparc.cc (Target_sparc::relocate_section): Add reloc_symbol_changes parameter. * configure.ac: Call AM_CONDITIONAL for the default target. * configure: Rebuild. * testsuite/Makefile.am (TEST_AS): New variable. (check_SCRIPTS): Add split_i386.sh and split_x86_64.sh. (check_DATA): Add split_i386 and split_x86_64 files. (SPLIT_DEFSYMS): Define. (split_i386_[1234n].o): New targets. (split_i386_[124]): New targets. (split_i386_[1234r].stdout): New targets. (split_x86_64_[1234n].o): New targets. (split_x86_64_[124]): New targets. (split_x86_64_[1234r].stdout): New targets. (MOSTLYCLEANFILES): Add new executables. * testsuite/split_i386.sh: New file. * testsuite/split_x86_64.sh: New file. * testsuite/split_i386_1.s: New file. * testsuite/split_i386_2.s: New file. * testsuite/split_i386_3.s: New file. * testsuite/split_i386_4.s: New file. * testsuite/split_i386_n.s: New file. * testsuite/split_x86_64_1.s: New file. * testsuite/split_x86_64_2.s: New file. * testsuite/split_x86_64_3.s: New file. * testsuite/split_x86_64_4.s: New file. * testsuite/split_x86_64_n.s: New file. * testsuite/testfile.cc (Target_test): Update relocation_section function. * testsuite/Makefile.in: Rebuild.
Diffstat (limited to 'gold/target.h')
-rw-r--r--gold/target.h43
1 files changed, 40 insertions, 3 deletions
diff --git a/gold/target.h b/gold/target.h
index ac59fb2..68d89dc 100644
--- a/gold/target.h
+++ b/gold/target.h
@@ -43,11 +43,13 @@ namespace gold
class General_options;
class Object;
+class Relobj;
template<int size, bool big_endian>
class Sized_relobj;
class Relocatable_relocs;
template<int size, bool big_endian>
class Relocate_info;
+class Reloc_symbol_changes;
class Symbol;
template<int size>
class Sized_symbol;
@@ -217,6 +219,22 @@ class Target
is_local_label_name(const char* name) const
{ return this->do_is_local_label_name(name); }
+ // A function starts at OFFSET in section SHNDX in OBJECT. That
+ // function was compiled with -fsplit-stack, but it refers to a
+ // function which was compiled without -fsplit-stack. VIEW is a
+ // modifiable view of the section; VIEW_SIZE is the size of the
+ // view. The target has to adjust the function so that it allocates
+ // enough stack.
+ void
+ calls_non_split(Relobj* object, unsigned int shndx,
+ section_offset_type fnoffset, section_size_type fnsize,
+ unsigned char* view, section_size_type view_size,
+ std::string* from, std::string* to) const
+ {
+ this->do_calls_non_split(object, shndx, fnoffset, fnsize, view, view_size,
+ from, to);
+ }
+
// Make an ELF object.
template<int size, bool big_endian>
Object*
@@ -244,7 +262,7 @@ class Target
return pass < 2;
return this->do_relax(pass);
- }
+ }
protected:
// This struct holds the constant information for a child class. We
@@ -331,9 +349,15 @@ class Target
virtual bool
do_is_local_label_name(const char*) const;
+ // Virtual function which may be overridden by the child class.
+ virtual void
+ do_calls_non_split(Relobj* object, unsigned int, section_offset_type,
+ section_size_type, unsigned char*, section_size_type,
+ std::string*, std::string*) const;
+
// make_elf_object hooks. There are four versions of these for
// different address sizes and endianities.
-
+
#ifdef HAVE_TARGET_32_LITTLE
// Virtual functions which may be overriden by the child class.
virtual Object*
@@ -372,6 +396,18 @@ class Target
do_relax(int)
{ return false; }
+ // A function for targets to call. Return whether BYTES/LEN matches
+ // VIEW/VIEW_SIZE at OFFSET.
+ bool
+ match_view(const unsigned char* view, section_size_type view_size,
+ section_offset_type offset, const char* bytes, size_t len) const;
+
+ // Set the contents of a VIEW/VIEW_SIZE to nops starting at OFFSET
+ // for LEN bytes.
+ void
+ set_view_to_nop(unsigned char* view, section_size_type view_size,
+ section_offset_type offset, size_t len) const;
+
private:
// The implementations of the four do_make_elf_object virtual functions are
// almost identical except for their sizes and endianity. We use a template.
@@ -478,7 +514,8 @@ class Sized_target : public Target
bool needs_special_offset_handling,
unsigned char* view,
typename elfcpp::Elf_types<size>::Elf_Addr view_address,
- section_size_type view_size) = 0;
+ section_size_type view_size,
+ const Reloc_symbol_changes*) = 0;
// Scan the relocs during a relocatable link. The parameters are
// like scan_relocs, with an additional Relocatable_relocs