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Fix PowerPC64 ELFv2 icf_safe failures

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ELFv2 doesn't use .opd, so folding function code can't be allowed
in safe mode if a function's address might be taken.

	* powerpc.cc (Target_powerpc::local_reloc_may_be_function_pointer):
	Only ignore relocs on ELFv1.
	(Target_powerpc::global_reloc_may_be_function_pointer): Likewise.
This commit is contained in:
Alan Modra
2014-06-01 22:01:44 +09:30
parent 16954d5d9d
commit f697178787
2 changed files with 21 additions and 5 deletions
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6
gold/ChangeLog
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@ -1,3 +1,9 @@
2014-06-02 Alan Modra <amodra@gmail.com>
* powerpc.cc (Target_powerpc::local_reloc_may_be_function_pointer):
Only ignore relocs on ELFv1.
(Target_powerpc::global_reloc_may_be_function_pointer): Likewise.
2014-05-30 Cary Coutant <ccoutant@google.com> 2014-05-30 Cary Coutant <ccoutant@google.com>
* testsuite/Makefile.am (ehdr_start_test_4): Fix typo in -B option. * testsuite/Makefile.am (ehdr_start_test_4): Fix typo in -B option.

20
gold/powerpc.cc
View File

@ -947,7 +947,7 @@ class Target_powerpc : public Sized_target<size, big_endian>
inline bool inline bool
local_reloc_may_be_function_pointer(Symbol_table* , Layout* , local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
Target_powerpc* , Target_powerpc* ,
Sized_relobj_file<size, big_endian>* , Sized_relobj_file<size, big_endian>* relobj,
unsigned int , unsigned int ,
Output_section* , Output_section* ,
const elfcpp::Rela<size, big_endian>& , const elfcpp::Rela<size, big_endian>& ,
@ -958,8 +958,13 @@ class Target_powerpc : public Sized_target<size, big_endian>
// may be folded and we'll still keep function addresses distinct. // may be folded and we'll still keep function addresses distinct.
// That means no reloc is of concern here. // That means no reloc is of concern here.
if (size == 64) if (size == 64)
return false; {
// For 32-bit, conservatively assume anything but calls to Powerpc_relobj<size, big_endian>* ppcobj = static_cast
<Powerpc_relobj<size, big_endian>*>(relobj);
if (ppcobj->abiversion() == 1)
return false;
}
// For 32-bit and ELFv2, conservatively assume anything but calls to
// function code might be taking the address of the function. // function code might be taking the address of the function.
return !is_branch_reloc(r_type); return !is_branch_reloc(r_type);
} }
@ -967,7 +972,7 @@ class Target_powerpc : public Sized_target<size, big_endian>
inline bool inline bool
global_reloc_may_be_function_pointer(Symbol_table* , Layout* , global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
Target_powerpc* , Target_powerpc* ,
Sized_relobj_file<size, big_endian>* , Sized_relobj_file<size, big_endian>* relobj,
unsigned int , unsigned int ,
Output_section* , Output_section* ,
const elfcpp::Rela<size, big_endian>& , const elfcpp::Rela<size, big_endian>& ,
@ -976,7 +981,12 @@ class Target_powerpc : public Sized_target<size, big_endian>
{ {
// As above. // As above.
if (size == 64) if (size == 64)
return false; {
Powerpc_relobj<size, big_endian>* ppcobj = static_cast
<Powerpc_relobj<size, big_endian>*>(relobj);
if (ppcobj->abiversion() == 1)
return false;
}
return !is_branch_reloc(r_type); return !is_branch_reloc(r_type);
} }