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[GOLD, PowerPC] Add --no-stub-group-multi

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The trouble with stubs per output section is that ppc32 uses a plt
stub as the address of a global function.  This needs to be unique,
otherwise we'll get multiple addresses for a function.

Obviously this is only a partial solution, since ppc32 will get
multiple stubs when code is larger than 33M.  A proper fix will
involve selecting a unique stub to use for non-branch relocs.

	* options.h (stub-group-multi): Default to true.  Add
	--no-stub-group-multi.
This commit is contained in:
Alan Modra 2017-09-19 11:45:51 +09:30
parent ced154d810
commit ab502e635e
2 changed files with 8 additions and 2 deletions
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5
gold/ChangeLog
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@ -1,3 +1,8 @@
2017-09-19 Alan Modra <amodra@gmail.com>
* options.h (stub-group-multi): Default to true. Add
--no-stub-group-multi.
2017-08-30 Alan Modra <amodra@gmail.com>
* powerpc.cc (Target_powerpc::Relocate::relocate): Nop addis on

5
gold/options.h
View File

@ -1235,9 +1235,10 @@ class General_options
"stubs are always after the group. 1 means use default size"),
N_("SIZE"));
DEFINE_bool(stub_group_multi, options::TWO_DASHES, '\0', false,
DEFINE_bool(stub_group_multi, options::TWO_DASHES, '\0', true,
N_("(PowerPC only) Allow a group of stubs to serve multiple "
"output sections"), NULL);
"output sections"),
N_("(PowerPC only) Each output section has its own stubs"));
DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x4000,
N_("Stack size when -fsplit-stack function calls non-split"),