diff options
author | Doug Kwan <dougkwan@google.com> | 2010-02-12 05:51:32 +0000 |
---|---|---|
committer | Doug Kwan <dougkwan@google.com> | 2010-02-12 05:51:32 +0000 |
commit | e4782e838130706e2d2d53a9e3c29f71419863ae (patch) | |
tree | 06d8666079258a16b125509735d9c22f3a044b6f /gold/arm.cc | |
parent | ecc13e538fab510f27fb5de27f93b6be8aff983f (diff) | |
download | gdb-e4782e838130706e2d2d53a9e3c29f71419863ae.zip gdb-e4782e838130706e2d2d53a9e3c29f71419863ae.tar.gz gdb-e4782e838130706e2d2d53a9e3c29f71419863ae.tar.bz2 |
2010-02-11 Doug Kwan <dougkwan@google.com>
* arm.cc (Target_arm::Scan::local): Fix bugs in relocation handling.
(Target_arm::Scan::global): Ditto. Also remove a comment before the
beginning of function.
(Target_arm::Relocate::relocate): Remove error messages for MOVW_ABS
and MOVT_ABS relocations. Those are non issued in scanning. Fix
parameter is_32bit in calls to should_apply_static_reloc.
* testsuite/Makefile.am (check_SCRIPTS): Add arm_abs_global.sh.
(check_DATA): Add arm_abs_global.stdout.
(arm_abs_lib.o, libarm_abs.so, arm_abs_global.o, arm_abs_global,
arm_abs_global.stdout): New rules.
(MOSTLLYCLEANFILES): Add arm_abs_global
* Makefile.in: Regenerate.
* testsuite/arm_abs_global.s: New file.
* testsuite/arm_abs_global.sh: Ditto.
* testsuite/arm_abs_lib.s: Ditto.
Diffstat (limited to 'gold/arm.cc')
-rw-r--r-- | gold/arm.cc | 322 |
1 files changed, 182 insertions, 140 deletions
diff --git a/gold/arm.cc b/gold/arm.cc index 902805c..d40ab2c 100644 --- a/gold/arm.cc +++ b/gold/arm.cc @@ -6572,12 +6572,15 @@ Target_arm<big_endian>::Scan::local(Symbol_table* symtab, Output_section* output_section, const elfcpp::Rel<32, big_endian>& reloc, unsigned int r_type, - const elfcpp::Sym<32, big_endian>&) + const elfcpp::Sym<32, big_endian>& lsym) { r_type = get_real_reloc_type(r_type); switch (r_type) { case elfcpp::R_ARM_NONE: + case elfcpp::R_ARM_V4BX: + case elfcpp::R_ARM_GNU_VTENTRY: + case elfcpp::R_ARM_GNU_VTINHERIT: break; case elfcpp::R_ARM_ABS32: @@ -6600,79 +6603,116 @@ Target_arm<big_endian>::Scan::local(Symbol_table* symtab, } break; - case elfcpp::R_ARM_REL32: - case elfcpp::R_ARM_THM_CALL: - case elfcpp::R_ARM_CALL: - case elfcpp::R_ARM_PREL31: - case elfcpp::R_ARM_JUMP24: - case elfcpp::R_ARM_THM_JUMP24: - case elfcpp::R_ARM_THM_JUMP19: - case elfcpp::R_ARM_PLT32: + case elfcpp::R_ARM_ABS16: + case elfcpp::R_ARM_ABS12: case elfcpp::R_ARM_THM_ABS5: case elfcpp::R_ARM_ABS8: - case elfcpp::R_ARM_ABS12: - case elfcpp::R_ARM_ABS16: case elfcpp::R_ARM_BASE_ABS: case elfcpp::R_ARM_MOVW_ABS_NC: case elfcpp::R_ARM_MOVT_ABS: case elfcpp::R_ARM_THM_MOVW_ABS_NC: case elfcpp::R_ARM_THM_MOVT_ABS: + // If building a shared library (or a position-independent + // executable), we need to create a dynamic relocation for + // this location. Because the addend needs to remain in the + // data section, we need to be careful not to apply this + // relocation statically. + if (parameters->options().output_is_position_independent()) + { + check_non_pic(object, r_type); + Reloc_section* rel_dyn = target->rel_dyn_section(layout); + unsigned int r_sym = elfcpp::elf_r_sym<32>(reloc.get_r_info()); + if (lsym.get_st_type() != elfcpp::STT_SECTION) + rel_dyn->add_local(object, r_sym, r_type, output_section, + data_shndx, reloc.get_r_offset()); + else + { + gold_assert(lsym.get_st_value() == 0); + unsigned int shndx = lsym.get_st_shndx(); + bool is_ordinary; + shndx = object->adjust_sym_shndx(r_sym, shndx, + &is_ordinary); + if (!is_ordinary) + object->error(_("section symbol %u has bad shndx %u"), + r_sym, shndx); + else + rel_dyn->add_local_section(object, shndx, + r_type, output_section, + data_shndx, reloc.get_r_offset()); + } + } + break; + + case elfcpp::R_ARM_PC24: + case elfcpp::R_ARM_REL32: + case elfcpp::R_ARM_LDR_PC_G0: + case elfcpp::R_ARM_SBREL32: + case elfcpp::R_ARM_THM_CALL: + case elfcpp::R_ARM_THM_PC8: + case elfcpp::R_ARM_BASE_PREL: + case elfcpp::R_ARM_PLT32: + case elfcpp::R_ARM_CALL: + case elfcpp::R_ARM_JUMP24: + case elfcpp::R_ARM_THM_JUMP24: + case elfcpp::R_ARM_LDR_SBREL_11_0_NC: + case elfcpp::R_ARM_ALU_SBREL_19_12_NC: + case elfcpp::R_ARM_ALU_SBREL_27_20_CK: + case elfcpp::R_ARM_SBREL31: + case elfcpp::R_ARM_PREL31: case elfcpp::R_ARM_MOVW_PREL_NC: case elfcpp::R_ARM_MOVT_PREL: case elfcpp::R_ARM_THM_MOVW_PREL_NC: case elfcpp::R_ARM_THM_MOVT_PREL: - case elfcpp::R_ARM_MOVW_BREL_NC: - case elfcpp::R_ARM_MOVT_BREL: - case elfcpp::R_ARM_MOVW_BREL: - case elfcpp::R_ARM_THM_MOVW_BREL_NC: - case elfcpp::R_ARM_THM_MOVT_BREL: - case elfcpp::R_ARM_THM_MOVW_BREL: + case elfcpp::R_ARM_THM_JUMP19: case elfcpp::R_ARM_THM_JUMP6: - case elfcpp::R_ARM_THM_JUMP8: - case elfcpp::R_ARM_THM_JUMP11: - case elfcpp::R_ARM_V4BX: - case elfcpp::R_ARM_THM_PC8: - case elfcpp::R_ARM_THM_PC12: case elfcpp::R_ARM_THM_ALU_PREL_11_0: + case elfcpp::R_ARM_THM_PC12: + case elfcpp::R_ARM_REL32_NOI: case elfcpp::R_ARM_ALU_PC_G0_NC: case elfcpp::R_ARM_ALU_PC_G0: case elfcpp::R_ARM_ALU_PC_G1_NC: case elfcpp::R_ARM_ALU_PC_G1: case elfcpp::R_ARM_ALU_PC_G2: + case elfcpp::R_ARM_LDR_PC_G1: + case elfcpp::R_ARM_LDR_PC_G2: + case elfcpp::R_ARM_LDRS_PC_G0: + case elfcpp::R_ARM_LDRS_PC_G1: + case elfcpp::R_ARM_LDRS_PC_G2: + case elfcpp::R_ARM_LDC_PC_G0: + case elfcpp::R_ARM_LDC_PC_G1: + case elfcpp::R_ARM_LDC_PC_G2: case elfcpp::R_ARM_ALU_SB_G0_NC: case elfcpp::R_ARM_ALU_SB_G0: case elfcpp::R_ARM_ALU_SB_G1_NC: case elfcpp::R_ARM_ALU_SB_G1: case elfcpp::R_ARM_ALU_SB_G2: - case elfcpp::R_ARM_LDR_PC_G0: - case elfcpp::R_ARM_LDR_PC_G1: - case elfcpp::R_ARM_LDR_PC_G2: case elfcpp::R_ARM_LDR_SB_G0: case elfcpp::R_ARM_LDR_SB_G1: case elfcpp::R_ARM_LDR_SB_G2: - case elfcpp::R_ARM_LDRS_PC_G0: - case elfcpp::R_ARM_LDRS_PC_G1: - case elfcpp::R_ARM_LDRS_PC_G2: case elfcpp::R_ARM_LDRS_SB_G0: case elfcpp::R_ARM_LDRS_SB_G1: case elfcpp::R_ARM_LDRS_SB_G2: - case elfcpp::R_ARM_LDC_PC_G0: - case elfcpp::R_ARM_LDC_PC_G1: - case elfcpp::R_ARM_LDC_PC_G2: case elfcpp::R_ARM_LDC_SB_G0: case elfcpp::R_ARM_LDC_SB_G1: case elfcpp::R_ARM_LDC_SB_G2: + case elfcpp::R_ARM_MOVW_BREL_NC: + case elfcpp::R_ARM_MOVT_BREL: + case elfcpp::R_ARM_MOVW_BREL: + case elfcpp::R_ARM_THM_MOVW_BREL_NC: + case elfcpp::R_ARM_THM_MOVT_BREL: + case elfcpp::R_ARM_THM_MOVW_BREL: + case elfcpp::R_ARM_THM_JUMP11: + case elfcpp::R_ARM_THM_JUMP8: + // We don't need to do anything for a relative addressing relocation + // against a local symbol if it does not reference the GOT. break; case elfcpp::R_ARM_GOTOFF32: + case elfcpp::R_ARM_GOTOFF12: // We need a GOT section: target->got_section(symtab, layout); break; - case elfcpp::R_ARM_BASE_PREL: - // FIXME: What about this? - break; - case elfcpp::R_ARM_GOT_BREL: case elfcpp::R_ARM_GOT_PREL: { @@ -6697,6 +6737,7 @@ Target_arm<big_endian>::Scan::local(Symbol_table* symtab, break; case elfcpp::R_ARM_TARGET1: + case elfcpp::R_ARM_TARGET2: // This should have been mapped to another type already. // Fall through. case elfcpp::R_ARM_COPY: @@ -6729,8 +6770,6 @@ Target_arm<big_endian>::Scan::unsupported_reloc_global( } // Scan a relocation for a global symbol. -// FIXME: This only handles a subset of relocation types used by Android -// on ARM v5te devices. template<bool big_endian> inline void @@ -6748,109 +6787,118 @@ Target_arm<big_endian>::Scan::global(Symbol_table* symtab, switch (r_type) { case elfcpp::R_ARM_NONE: + case elfcpp::R_ARM_V4BX: + case elfcpp::R_ARM_GNU_VTENTRY: + case elfcpp::R_ARM_GNU_VTINHERIT: break; case elfcpp::R_ARM_ABS32: + case elfcpp::R_ARM_ABS16: + case elfcpp::R_ARM_ABS12: + case elfcpp::R_ARM_THM_ABS5: + case elfcpp::R_ARM_ABS8: + case elfcpp::R_ARM_BASE_ABS: + case elfcpp::R_ARM_MOVW_ABS_NC: + case elfcpp::R_ARM_MOVT_ABS: + case elfcpp::R_ARM_THM_MOVW_ABS_NC: + case elfcpp::R_ARM_THM_MOVT_ABS: case elfcpp::R_ARM_ABS32_NOI: + // Absolute addressing relocations. { - // Make a dynamic relocation if necessary. - if (gsym->needs_dynamic_reloc(Symbol::ABSOLUTE_REF)) - { - if (target->may_need_copy_reloc(gsym)) - { - target->copy_reloc(symtab, layout, object, - data_shndx, output_section, gsym, reloc); - } - else if (gsym->can_use_relative_reloc(false)) - { - // If we are to add more other reloc types than R_ARM_ABS32, - // we need to add check_non_pic(object, r_type) here. - Reloc_section* rel_dyn = target->rel_dyn_section(layout); - rel_dyn->add_global_relative(gsym, elfcpp::R_ARM_RELATIVE, - output_section, object, - data_shndx, reloc.get_r_offset()); - } - else - { - // If we are to add more other reloc types than R_ARM_ABS32, - // we need to add check_non_pic(object, r_type) here. - Reloc_section* rel_dyn = target->rel_dyn_section(layout); - rel_dyn->add_global(gsym, r_type, output_section, object, - data_shndx, reloc.get_r_offset()); - } - } + // Make a PLT entry if necessary. + if (this->symbol_needs_plt_entry(gsym)) + { + target->make_plt_entry(symtab, layout, gsym); + // Since this is not a PC-relative relocation, we may be + // taking the address of a function. In that case we need to + // set the entry in the dynamic symbol table to the address of + // the PLT entry. + if (gsym->is_from_dynobj() && !parameters->options().shared()) + gsym->set_needs_dynsym_value(); + } + // Make a dynamic relocation if necessary. + if (gsym->needs_dynamic_reloc(Symbol::ABSOLUTE_REF)) + { + if (gsym->may_need_copy_reloc()) + { + target->copy_reloc(symtab, layout, object, + data_shndx, output_section, gsym, reloc); + } + else if ((r_type == elfcpp::R_ARM_ABS32 + || r_type == elfcpp::R_ARM_ABS32_NOI) + && gsym->can_use_relative_reloc(false)) + { + Reloc_section* rel_dyn = target->rel_dyn_section(layout); + rel_dyn->add_global_relative(gsym, elfcpp::R_ARM_RELATIVE, + output_section, object, + data_shndx, reloc.get_r_offset()); + } + else + { + check_non_pic(object, r_type); + Reloc_section* rel_dyn = target->rel_dyn_section(layout); + rel_dyn->add_global(gsym, r_type, output_section, object, + data_shndx, reloc.get_r_offset()); + } + } } break; - case elfcpp::R_ARM_MOVW_ABS_NC: - case elfcpp::R_ARM_MOVT_ABS: - case elfcpp::R_ARM_THM_MOVW_ABS_NC: - case elfcpp::R_ARM_THM_MOVT_ABS: + case elfcpp::R_ARM_GOTOFF32: + case elfcpp::R_ARM_GOTOFF12: + // We need a GOT section. + target->got_section(symtab, layout); + break; + + case elfcpp::R_ARM_REL32: + case elfcpp::R_ARM_LDR_PC_G0: + case elfcpp::R_ARM_SBREL32: + case elfcpp::R_ARM_THM_PC8: + case elfcpp::R_ARM_BASE_PREL: + case elfcpp::R_ARM_LDR_SBREL_11_0_NC: + case elfcpp::R_ARM_ALU_SBREL_19_12_NC: + case elfcpp::R_ARM_ALU_SBREL_27_20_CK: case elfcpp::R_ARM_MOVW_PREL_NC: case elfcpp::R_ARM_MOVT_PREL: case elfcpp::R_ARM_THM_MOVW_PREL_NC: case elfcpp::R_ARM_THM_MOVT_PREL: - case elfcpp::R_ARM_MOVW_BREL_NC: - case elfcpp::R_ARM_MOVT_BREL: - case elfcpp::R_ARM_MOVW_BREL: - case elfcpp::R_ARM_THM_MOVW_BREL_NC: - case elfcpp::R_ARM_THM_MOVT_BREL: - case elfcpp::R_ARM_THM_MOVW_BREL: - case elfcpp::R_ARM_THM_JUMP6: - case elfcpp::R_ARM_THM_JUMP8: - case elfcpp::R_ARM_THM_JUMP11: - case elfcpp::R_ARM_V4BX: - case elfcpp::R_ARM_THM_PC8: - case elfcpp::R_ARM_THM_PC12: case elfcpp::R_ARM_THM_ALU_PREL_11_0: + case elfcpp::R_ARM_THM_PC12: + case elfcpp::R_ARM_REL32_NOI: case elfcpp::R_ARM_ALU_PC_G0_NC: case elfcpp::R_ARM_ALU_PC_G0: case elfcpp::R_ARM_ALU_PC_G1_NC: case elfcpp::R_ARM_ALU_PC_G1: case elfcpp::R_ARM_ALU_PC_G2: + case elfcpp::R_ARM_LDR_PC_G1: + case elfcpp::R_ARM_LDR_PC_G2: + case elfcpp::R_ARM_LDRS_PC_G0: + case elfcpp::R_ARM_LDRS_PC_G1: + case elfcpp::R_ARM_LDRS_PC_G2: + case elfcpp::R_ARM_LDC_PC_G0: + case elfcpp::R_ARM_LDC_PC_G1: + case elfcpp::R_ARM_LDC_PC_G2: case elfcpp::R_ARM_ALU_SB_G0_NC: case elfcpp::R_ARM_ALU_SB_G0: case elfcpp::R_ARM_ALU_SB_G1_NC: case elfcpp::R_ARM_ALU_SB_G1: case elfcpp::R_ARM_ALU_SB_G2: - case elfcpp::R_ARM_LDR_PC_G0: - case elfcpp::R_ARM_LDR_PC_G1: - case elfcpp::R_ARM_LDR_PC_G2: case elfcpp::R_ARM_LDR_SB_G0: case elfcpp::R_ARM_LDR_SB_G1: case elfcpp::R_ARM_LDR_SB_G2: - case elfcpp::R_ARM_LDRS_PC_G0: - case elfcpp::R_ARM_LDRS_PC_G1: - case elfcpp::R_ARM_LDRS_PC_G2: case elfcpp::R_ARM_LDRS_SB_G0: case elfcpp::R_ARM_LDRS_SB_G1: case elfcpp::R_ARM_LDRS_SB_G2: - case elfcpp::R_ARM_LDC_PC_G0: - case elfcpp::R_ARM_LDC_PC_G1: - case elfcpp::R_ARM_LDC_PC_G2: case elfcpp::R_ARM_LDC_SB_G0: case elfcpp::R_ARM_LDC_SB_G1: case elfcpp::R_ARM_LDC_SB_G2: - break; - - case elfcpp::R_ARM_THM_ABS5: - case elfcpp::R_ARM_ABS8: - case elfcpp::R_ARM_ABS12: - case elfcpp::R_ARM_ABS16: - case elfcpp::R_ARM_BASE_ABS: - { - // No dynamic relocs of this kinds. - // Report the error in case of PIC. - int flags = Symbol::NON_PIC_REF; - if (gsym->type() == elfcpp::STT_FUNC - || gsym->type() == elfcpp::STT_ARM_TFUNC) - flags |= Symbol::FUNCTION_CALL; - if (gsym->needs_dynamic_reloc(flags)) - check_non_pic(object, r_type); - } - break; - - case elfcpp::R_ARM_REL32: + case elfcpp::R_ARM_MOVW_BREL_NC: + case elfcpp::R_ARM_MOVT_BREL: + case elfcpp::R_ARM_MOVW_BREL: + case elfcpp::R_ARM_THM_MOVW_BREL_NC: + case elfcpp::R_ARM_THM_MOVT_BREL: + case elfcpp::R_ARM_THM_MOVW_BREL: + // Relative addressing relocations. { // Make a dynamic relocation if necessary. int flags = Symbol::NON_PIC_REF; @@ -6872,14 +6920,27 @@ Target_arm<big_endian>::Scan::global(Symbol_table* symtab, } break; - case elfcpp::R_ARM_JUMP24: - case elfcpp::R_ARM_THM_JUMP24: - case elfcpp::R_ARM_THM_JUMP19: - case elfcpp::R_ARM_CALL: + case elfcpp::R_ARM_PC24: case elfcpp::R_ARM_THM_CALL: case elfcpp::R_ARM_PLT32: + case elfcpp::R_ARM_CALL: + case elfcpp::R_ARM_JUMP24: + case elfcpp::R_ARM_THM_JUMP24: + case elfcpp::R_ARM_SBREL31: case elfcpp::R_ARM_PREL31: - case elfcpp::R_ARM_PC24: + case elfcpp::R_ARM_THM_JUMP19: + case elfcpp::R_ARM_THM_JUMP6: + case elfcpp::R_ARM_THM_JUMP11: + case elfcpp::R_ARM_THM_JUMP8: + // All the relocation above are branches except for the PREL31 ones. + // A PREL31 relocation can point to a personality function in a shared + // library. In that case we want to use a PLT because we want to + // call the personality routine and the dyanmic linkers we care about + // do not support dynamic PREL31 relocations. An REL31 relocation may + // point to a function whose unwinding behaviour is being described but + // we will not mistakenly generate a PLT for that because we should use + // a local section symbol. + // If the symbol is fully resolved, this is just a relative // local reloc. Otherwise we need a PLT entry. if (gsym->final_value_is_known()) @@ -6894,16 +6955,8 @@ Target_arm<big_endian>::Scan::global(Symbol_table* symtab, target->make_plt_entry(symtab, layout, gsym); break; - case elfcpp::R_ARM_GOTOFF32: - // We need a GOT section. - target->got_section(symtab, layout); - break; - - case elfcpp::R_ARM_BASE_PREL: - // FIXME: What about this? - break; - case elfcpp::R_ARM_GOT_BREL: + case elfcpp::R_ARM_GOT_ABS: case elfcpp::R_ARM_GOT_PREL: { // The symbol requires a GOT entry. @@ -6933,7 +6986,8 @@ Target_arm<big_endian>::Scan::global(Symbol_table* symtab, break; case elfcpp::R_ARM_TARGET1: - // This should have been mapped to another type already. + case elfcpp::R_ARM_TARGET2: + // These should have been mapped to other types already. // Fall through. case elfcpp::R_ARM_COPY: case elfcpp::R_ARM_GLOB_DAT: @@ -7403,43 +7457,31 @@ Target_arm<big_endian>::Relocate::relocate( break; case elfcpp::R_ARM_MOVW_ABS_NC: - if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, true, + if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, false, output_section)) reloc_status = Arm_relocate_functions::movw(view, object, psymval, 0, thumb_bit, check_overflow); - else - gold_error(_("relocation R_ARM_MOVW_ABS_NC cannot be used when making" - "a shared object; recompile with -fPIC")); break; case elfcpp::R_ARM_MOVT_ABS: - if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, true, + if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, false, output_section)) reloc_status = Arm_relocate_functions::movt(view, object, psymval, 0); - else - gold_error(_("relocation R_ARM_MOVT_ABS cannot be used when making" - "a shared object; recompile with -fPIC")); break; case elfcpp::R_ARM_THM_MOVW_ABS_NC: - if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, true, + if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, false, output_section)) reloc_status = Arm_relocate_functions::thm_movw(view, object, psymval, 0, thumb_bit, false); - else - gold_error(_("relocation R_ARM_THM_MOVW_ABS_NC cannot be used when" - "making a shared object; recompile with -fPIC")); break; case elfcpp::R_ARM_THM_MOVT_ABS: - if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, true, + if (should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, false, output_section)) reloc_status = Arm_relocate_functions::thm_movt(view, object, psymval, 0); - else - gold_error(_("relocation R_ARM_THM_MOVT_ABS cannot be used when" - "making a shared object; recompile with -fPIC")); break; case elfcpp::R_ARM_MOVW_PREL_NC: @@ -7512,7 +7554,7 @@ Target_arm<big_endian>::Relocate::relocate( case elfcpp::R_ARM_BASE_ABS: { - if (!should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, true, + if (!should_apply_static_reloc(gsym, Symbol::ABSOLUTE_REF, false, output_section)) break; |