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authorAlan Modra <amodra@gmail.com>2015-12-09 10:18:30 +1030
committerAlan Modra <amodra@gmail.com>2015-12-09 10:36:43 +1030
commit91a65d2fe88fabe2d553a0362b2f76034f820175 (patch)
treeafa6f7c0717f26c9cd56038d3c42eeacbcbc7002 /gold/reloc.h
parentb7a5f21d4f98e006ac98df0c3494a6b8380917bd (diff)
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[GOLD] Relocate::relocate() params
Some linker code editing needs to change multiple insns. In some cases multiple relocations are involved and it is not sufficient to make the changes independently as relocations are processed, because doing so might lead to a partial edit. So in order to safely edit we need all the relocations available in relocate(). Also, to emit edited relocs corresponding to the edited code sequence we need some way to pass information from relocate() to relocate_relocs(), particularly if the edit depends on insns. We can't modify input relocs in relocate() as they are mmapped PROT_READ, nor it is particularly clean to write relocs to the output at that stage. So add a Relocatable_relocs* field to relinfo to mark edited relocs. Given that relocate is passed the raw reloc pointer, it makes sense to remove the rel/rela parameter and r_type too. However, that means the mips relocate() needs to know whether SHT_REL or SHT_RELA relocs are being processed. So add a rel_type for mips, which also has the benefit of removing relocate() overloading there. This patch adds the infrastructure without making use of it. Note that relinfo->rr will be NULL if not outputting relocations. * object.h (struct Relocate_info): Add "rr". * reloc.h (Relocatable_relocs::set_strategy): New accessor. * reloc.cc (Sized_relobj_file::do_relocate_sections): Init relinfo.rr for relocate_section and relocate_relocs. * powerpc.cc (relocate): Add rel_type and preloc parameters. Delete rela and r_type params, instead recalculate these from preloc. (relocate_relocs): Delete Relocatable_relocs* param, instead use relinfo->rr. * aarch64.cc: Likewise. * arm.cc: Likewise. * i386.cc: Likewise. * mips.cc: Likewise. * s390.cc: Likewise. * sparc.cc: Likewise. * target.h: Likewise. * tilegx.cc: Likewise. * x86_64.cc: Likewise. * testsuite/testfile.cc: Likewise. * target-reloc.h (relocate_section): Adjust to suit. (apply_relocation, relocate_relocs): Likewise.
Diffstat (limited to 'gold/reloc.h')
-rw-r--r--gold/reloc.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/gold/reloc.h b/gold/reloc.h
index 559206e..f325ae6 100644
--- a/gold/reloc.h
+++ b/gold/reloc.h
@@ -296,6 +296,14 @@ class Relocatable_relocs
return static_cast<Reloc_strategy>(this->reloc_strategies_[i]);
}
+ // Set the strategy for reloc I.
+ void
+ set_strategy(unsigned int i, Reloc_strategy strategy)
+ {
+ gold_assert(i < this->reloc_strategies_.size());
+ this->reloc_strategies_[i] = strategy;
+ }
+
// Return the number of relocations to create in the output file.
size_t
output_reloc_count() const