Here we have the patch for gold aarch64 backend to support relaxation.
In short relaxation is the linker's generation of stubs that fixes the out-of-range jumps/branches in the original object file. With this implementation, we are able to link a 456MB aarch64 application. Tested: 1) Build natively on x86_64 and aarch64 machines. 2) Pass unit tests regarding relaxation.
This commit is contained in:
Han Shen
parent
44ee4a526d
commit
83a0195717
3 changed files with 2189 additions and 78 deletions
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@ -1,3 +1,30 @@
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2014-09-22 Han Shen <shenhan@google.com>
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Jing Yu <jingyu@google.com>
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Patch for gold aarch64 backend to support relaxation.
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* aarch64-reloc.def: Change format.
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* aarch64.cc (class Reloc_stub): New class.
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(class Stub_table): New class.
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(class AArch64_relobj): New class.
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(class AArch64_input_section): New class.
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(class AArch64_output_section): New class.
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(Target_aarch64::new_stub_table): New method.
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(Target_aarch64::new_aarch64_input_section): New method.
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(Target_aarch64::find_aarch64_input_section): New method.
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(Target_aarch64::scan_section_for_stubs): New method.
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(Target_aarch64::scan_reloc_section_for_stubs): New method.
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(Target_aarch64::relocate_stub): New method.
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(Target_aarch64::current_target): New method.
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(Target_aarch64::do_make_elf_object): New method.
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(Target_aarch64::do_may_relax): New method.
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(Target_aarch64::do_relax): New method.
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(Target_aarch64::group_sections): New method.
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(Target_aarch64::scan_reloc_for_stub): New method.
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(Target_aarch64::do_make_output_section): New method.
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(Target_aarch64::stub_tables_): New data member.
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(Target_aarch64::aarch64_input_section_map_): New data member.
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(AArch64_relocate_functions::maybe_apply_stub): New method.
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2014-09-30 Cary Coutant <ccoutant@google.com>
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PR gold/17432
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@ -22,54 +22,53 @@
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//
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//
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//
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// Insn modified by relocation, see enum Reloc_inst -------------------------------------------------------------------------+
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// Symbol reference type -----------------------------------------------------------------------------+ |
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// Portion off X to retrieve -------------------------------------------------------------------+ | |
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// Checking function, see Note(A)---------------------------------------+ | | |
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// Group index---------------------------------------------------+ | | | |
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// Implemented----------------------------------------------+ | | | | |
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// Class-------------------------------------+ | | | | | |
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// Type----------------------------+ | | | | | | |
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// Name | | | | | | | |
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// | | | | | | | | |
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ARD(ABS64 , STATIC , DATA , Y, -1, 0,0 , 0,0 , Symbol::ABSOLUTE_REF , DATA )
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ARD(ABS32 , STATIC , DATA , Y, -1, 31,32 , 0,0 , Symbol::ABSOLUTE_REF , DATA )
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ARD(ABS16 , STATIC , DATA , Y, -1, 15,16 , 0,0 , Symbol::ABSOLUTE_REF , DATA )
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ARD(PREL64 , STATIC , DATA , Y, -1, 0,0 , 0,0 , Symbol::RELATIVE_REF , DATA )
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ARD(PREL32 , STATIC , DATA , Y, -1, 31,32 , 0,0 , Symbol::RELATIVE_REF , DATA )
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ARD(PREL16 , STATIC , DATA , Y, -1, 15,16 , 0,0 , Symbol::RELATIVE_REF , DATA )
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// Insn modified by relocation, see enum Reloc_inst -------------------------------------------------------------------------------------------------+
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// Symbol reference type -----------------------------------------------------------------------------+ |
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// Portion off X to retrieve -------------------------------------------------------------------+ | |
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// Checking function, see Note(A)---------------------------------------+ | | |
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// Group index---------------------------------------------------+ | | | |
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// Implemented----------------------------------------------+ | | | | |
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// Class-------------------------------------+ | | | | | |
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// Type----------------------------+ | | | | | | |
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// Name | | | | | | | |
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// | | | | | | | | |
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ARD(ABS64 , STATIC , DATA , Y, -1, 0,0 , 0,0 , Symbol::ABSOLUTE_REF , DATA )
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ARD(ABS32 , STATIC , DATA , Y, -1, 31,32 , 0,0 , Symbol::ABSOLUTE_REF , DATA )
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ARD(ABS16 , STATIC , DATA , Y, -1, 15,16 , 0,0 , Symbol::ABSOLUTE_REF , DATA )
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ARD(PREL64 , STATIC , DATA , Y, -1, 0,0 , 0,0 , Symbol::RELATIVE_REF , DATA )
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ARD(PREL32 , STATIC , DATA , Y, -1, 31,32 , 0,0 , Symbol::RELATIVE_REF , DATA )
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ARD(PREL16 , STATIC , DATA , Y, -1, 15,16 , 0,0 , Symbol::RELATIVE_REF , DATA )
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// Above is from Table 4-6, Data relocations, 257-262.
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ARD(ADR_PREL_PG_HI21 , STATIC , AARCH64 , Y, -1, 32,32 , 12,32 , Symbol::RELATIVE_REF , ADRP )
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ARD(ADR_PREL_PG_HI21_NC , STATIC , AARCH64 , Y, -1, 0,0 , 12,32 , Symbol::RELATIVE_REF , ADRP )
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ARD(LDST8_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,0 , 0,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(LDST16_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN2 , 1,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(LDST32_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN4 , 2,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(LDST64_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN8 , 3,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(LDST128_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN16 , 4,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(ADD_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,0 , 0,11 , Symbol::ABSOLUTE_REF , ADD )
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ARD(ADR_GOT_PAGE , STATIC , AARCH64 , Y, -1, 32,32 , 12,32 , Symbol::RELATIVE_REF , ADRP )
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ARD(LD64_GOT_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN8 , 3,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(ADR_PREL_PG_HI21 , STATIC , AARCH64 , Y, -1, 32,32 , 12,32 , Symbol::RELATIVE_REF , ADRP )
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ARD(ADR_PREL_PG_HI21_NC , STATIC , AARCH64 , Y, -1, 0,0 , 12,32 , Symbol::RELATIVE_REF , ADRP )
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ARD(LDST8_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,0 , 0,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(LDST16_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN2 , 1,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(LDST32_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN4 , 2,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(LDST64_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN8 , 3,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(LDST128_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN16 , 4,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(ADD_ABS_LO12_NC , STATIC , AARCH64 , Y, -1, 0,0 , 0,11 , Symbol::ABSOLUTE_REF , ADD )
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ARD(ADR_GOT_PAGE , STATIC , AARCH64 , Y, -1, 32,32 , 12,32 , Symbol::RELATIVE_REF , ADRP )
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ARD(LD64_GOT_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN8 , 3,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(TSTBR14 , STATIC , CFLOW , N, -1, 15,15 , 2,15 , (Symbol::FUNCTION_CALL|Symbol::ABSOLUTE_REF) , TBZNZ )
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ARD(CONDBR19 , STATIC , CFLOW , N, -1, 20,20 , 2,20 , (Symbol::FUNCTION_CALL|Symbol::ABSOLUTE_REF) , CONDB )
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ARD(CALL26 , STATIC , CFLOW , Y, -1, 27,27 , 2,27 , (Symbol::FUNCTION_CALL|Symbol::RELATIVE_REF) , CALL )
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ARD(JUMP26 , STATIC , CFLOW , Y, -1, 27,27 , 2,27 , (Symbol::FUNCTION_CALL|Symbol::RELATIVE_REF) , B )
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ARD(CALL26 , STATIC , CFLOW , Y, -1, 27,27 , 2,27 , (Symbol::FUNCTION_CALL|Symbol::RELATIVE_REF) , CALL )
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ARD(JUMP26 , STATIC , CFLOW , Y, -1, 27,27 , 2,27 , (Symbol::FUNCTION_CALL|Symbol::RELATIVE_REF) , B )
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// Above is from Table 4-10, Relocations for control-flow instructions,
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// 279-283.
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ARD(TLSGD_ADR_PAGE21 , STATIC , AARCH64 , Y, -1, 32,32 , 12,32 , Symbol::ABSOLUTE_REF , ADRP )
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ARD(TLSGD_ADD_LO12_NC , STATIC , AARCH64 , Y, -1, 0,0 , 0,11 , Symbol::ABSOLUTE_REF , ADD )
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ARD(TLSIE_MOVW_GOTTPREL_G1 , STATIC , AARCH64 , N, -1, 0,0 , 16,31 , Symbol::ABSOLUTE_REF , MOVW )
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ARD(TLSIE_MOVW_GOTTPREL_G0_NC , STATIC , AARCH64 , N, -1, 0,0 , 0,15 , Symbol::ABSOLUTE_REF , MOVW )
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ARD(TLSIE_ADR_GOTTPREL_PAGE21 , STATIC , AARCH64 , Y, -1, 32,32 , 12,32 , Symbol::ABSOLUTE_REF , ADRP )
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ARD(TLSIE_LD64_GOTTPREL_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN8 , 3,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(TLSIE_LD_GOTTPREL_PREL19 , STATIC , AARCH64 , N, -1, 20,20 , 2,20 , Symbol::ABSOLUTE_REF , LD )
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ARD(TLSGD_ADR_PAGE21 , STATIC , AARCH64 , Y, -1, 32,32 , 12,32 , Symbol::ABSOLUTE_REF , ADRP )
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ARD(TLSGD_ADD_LO12_NC , STATIC , AARCH64 , Y, -1, 0,0 , 0,11 , Symbol::ABSOLUTE_REF , ADD )
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ARD(TLSIE_MOVW_GOTTPREL_G1 , STATIC , AARCH64 , N, -1, 0,0 , 16,31 , Symbol::ABSOLUTE_REF , MOVW )
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ARD(TLSIE_MOVW_GOTTPREL_G0_NC , STATIC , AARCH64 , N, -1, 0,0 , 0,15 , Symbol::ABSOLUTE_REF , MOVW )
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ARD(TLSIE_ADR_GOTTPREL_PAGE21 , STATIC , AARCH64 , Y, -1, 32,32 , 12,32 , Symbol::ABSOLUTE_REF , ADRP )
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ARD(TLSIE_LD64_GOTTPREL_LO12_NC , STATIC , AARCH64 , Y, -1, 0,RL_CHECK_ALIGN8 , 3,11 , Symbol::ABSOLUTE_REF , LDST )
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ARD(TLSIE_LD_GOTTPREL_PREL19 , STATIC , AARCH64 , N, -1, 20,20 , 2,20 , Symbol::ABSOLUTE_REF , LD )
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// Above is from Table 4-17, Initial Exec TLS relocations, 539-543.
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ARD(TLSLE_ADD_TPREL_HI12 , STATIC , AARCH64 , Y, -1, 0,24 , 12,23 , Symbol::ABSOLUTE_REF , ADD )
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ARD(TLSLE_ADD_TPREL_LO12 , STATIC , AARCH64 , Y, -1, 0,12 , 0,11 , Symbol::ABSOLUTE_REF , ADD )
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ARD(TLSLE_ADD_TPREL_LO12_NC , STATIC , AARCH64 , Y, -1, 0,0 , 0,11 , Symbol::ABSOLUTE_REF , ADD )
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ARD(TLSLE_ADD_TPREL_HI12 , STATIC , AARCH64 , Y, -1, 0,24 , 12,23 , Symbol::ABSOLUTE_REF , ADD )
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ARD(TLSLE_ADD_TPREL_LO12 , STATIC , AARCH64 , Y, -1, 0,12 , 0,11 , Symbol::ABSOLUTE_REF , ADD )
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ARD(TLSLE_ADD_TPREL_LO12_NC , STATIC , AARCH64 , Y, -1, 0,0 , 0,11 , Symbol::ABSOLUTE_REF , ADD )
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// Above is from Table 4-18, Local Exec TLS relocations, 544-571.
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ARD(TLSDESC_ADR_PAGE21 , STATIC , AARCH64 , Y, -1, 32,32 , 12,32 , Symbol::RELATIVE_REF , ADRP )
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2163
gold/aarch64.cc
2163
gold/aarch64.cc
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