738e53487d
* reloc.c (BFD_RELOC_MIPS16_GOT16, BFD_RELOC_MIPS16_CALL16): Declare. * libbfd.h, bfd-in2.h: Regenerate. * elf32-mips.c (elf_mips16_howto_table_rel): Fill in reserved R_MIPS16_GOT16 and R_MIPS16_CALL16 entries. (mips16_reloc_map): Add mappings. * elf64-mips.c (mips16_elf64_howto_table_rel): Fill in reserved R_MIPS16_GOT16 and R_MIPS16_CALL16 entries. (mips16_elf64_howto_table_rela): Likewise. (mips16_reloc_map): Add mappings. * elfn32-mips.c (elf_mips16_howto_table_rel): Fill in reserved R_MIPS16_GOT16 and R_MIPS16_CALL16 entries. (elf_mips16_howto_table_rela): Likewise. (mips16_reloc_map): Add mappings. * elfxx-mips.c (mips_elf_create_shadow_symbol): New function. (section_allows_mips16_refs_p): Likewise. (mips16_stub_symndx): Likewise. (mips_elf_check_mips16_stubs): Treat the data argument as a bfd_link_info. Mark every dynamic symbol as needing MIPS16 stubs and create a "shadow" symbol for the original MIPS16 definition. (mips16_reloc_p, got16_reloc_p, call16_reloc_p, hi16_reloc_p) (lo16_reloc_p, mips16_call_reloc_p): New functions. (_bfd_mips16_elf_reloc_unshuffle): Use mips16_reloc_p to generalize relocation checks. (_bfd_mips16_elf_reloc_shuffle): Likewise. (_bfd_mips_elf_lo16_reloc): Handle R_MIPS16_GOT16. (mips_elf_got16_entry): Add comment. (mips_elf_calculate_relocation): Use hi16_reloc_p, lo16_reloc_p, mips16_call_reloc_p, call16_reloc_p and got16_reloc_p to generalize relocation checks. Use section_allows_mips16_refs_p instead of mips16_stub_section_p. Handle R_MIPS16_CALL16 and R_MIPS16_GOT16, allowing the former to refer directly to a MIPS16 function if its stub is not needed. (mips16_stub_section_p): Delete. (_bfd_mips_elf_symbol_processing): Convert odd-valued function symbols into even MIPS16 symbols. (mips_elf_add_lo16_rel_addend): Use mips16_reloc_p to generalize a relocation check. (_bfd_mips_elf_check_relocs): Calculate "bed" and "rel_end" earlier in the function. Use mips16_stub_symndx to identify the target function. Avoid out-of-bounds accesses when the stub has no relocations; report an error instead. Use section_allows_mips16_refs_p instead of mips16_stub_section_p. Use mips16_call_reloc_p and got16_reloc_p to generalize relocation checks. Handle R_MIPS16_CALL16 and R_MIPS16_GOT16. Don't create dynamic relocations for absolute references to __gnu_local_gp. (_bfd_mips_elf_always_size_sections): Pass a bfd_link_info as the argument to mips_elf_check_mips16_stubs. Generalize comment. (_bfd_mips_elf_relocate_section): Use hi16_reloc_p and got16_reloc_p to generalize relocation checks. (_bfd_mips_elf_finish_dynamic_symbol): If a dynamic MIPS16 function symbol has a non-MIPS16 stub, redirect the symbol to the stub. Fix an overly long line. Don't give dynamic symbols type STO_MIPS16. (_bfd_mips_elf_gc_sweep_hook): Handle R_MIPS16_CALL16 and R_MIPS16_GOT16. gas/ * config/tc-mips.c (mips16_reloc_p, got16_reloc_p, hi16_reloc_p) (lo16_reloc_p): New functions. (reloc_needs_lo_p): Use hi16_reloc_p and got16_reloc_p to generalize relocation checks. (matching_lo_reloc): New function. (fixup_has_matching_lo_p): Use it. (mips16_mark_labels): Don't clobber a symbol's visibility. (append_insn): Use hi16_reloc_p and lo16_reloc_p. (mips16_ip): Handle BFD_RELOC_MIPS16_GOT16 and BFD_RELOC_MIPS16_CALL16. (md_apply_fix): Likewise. (mips16_percent_op): Add %got and %call16. (mips_frob_file): Use got16_reloc_p to generalize relocation checks. Use matching_lo_reloc. (mips_force_relocation): Use hi16_reloc_p and lo16_reloc_p to generalize relocation checks. (mips_fix_adjustable): Use lo16_reloc_p to generalize relocation checks. gas/testsuite/ * gas/mips/elf-rel8-mips16.d, gas/mips/elf-rel8-mips16.s, * gas/mips/elf-rel9-mips16.d, gas/mips/elf-rel9-mips16.s, * gas/mips/elf-rel13-mips16.d, gas/mips/elf-rel13-mips16.s: New tests. * gas/mips/mips.exp: Run them. ld/testsuite/ * ld-mips-elf/mips16-local-stubs-1.d: Remove stub_for_h3, which was only referenced by the .pdr section, and was not actually needed by code. * ld-mips-elf/mips16-intermix.d: Remove unused static function stubs. * ld-mips-elf/mips16-pic-1a.s, ld-mips-elf/mips16-pic-1b.s, ld-mips-elf/mips16-pic-1-dummy.s, ld-mips-elf/mips16-pic-1.dd, ld-mips-elf/mips16-pic-1.gd, ld-mips-elf/mips16-pic-1.inc, ld-mips-elf/mips16-pic-1.ld, ld-mips-elf/mips16-pic-2a.s, ld-mips-elf/mips16-pic-2b.s, ld-mips-elf/mips16-pic-2.ad, ld-mips-elf/mips16-pic-2.dd, ld-mips-elf/mips16-pic-2.gd, ld-mips-elf/mips16-pic-2.nd, ld-mips-elf/mips16-pic-2.rd: New tests. * ld-mips-elf/mips-elf.exp: Run them.
147 lines
3 KiB
PHP
147 lines
3 KiB
PHP
# Declare a function called NAME and an __fn_NAME stub for it.
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# Make the stub use la_TYPE to load the the target address into $2.
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.macro stub,name,type
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.set nomips16
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.section .mips16.fn.\name, "ax", @progbits
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.ent __fn_\name
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__fn_\name:
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la_\type \name
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mfc1 $4,$f12
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jr $2
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nop
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.end __fn_\name
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.set mips16
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.text
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.ent \name
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\name:
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__fn_local_\name:
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jr $31
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nop
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.end \name
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.endm
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# Like stub, but ensure NAME is a local symbol.
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.macro lstub,name,type
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stub \name, \type
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.equ local_\name,1
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.endm
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# Like stub, but ensure NAME is a hidden symbol.
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.macro hstub,name,type
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.globl \name
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.hidden \name
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stub \name, \type
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.endm
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# Like lstub, but make the MIPS16 function global rather than local.
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.macro gstub,name,type
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.globl \name
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stub \name, \type
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.endm
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# Use an absolute sequence to load NAME into a register.
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.macro la_noshared,name
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lui $2,%hi(\name)
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addiu $2,$2,%lo(\name)
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.endm
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# Use the normal PIC sequence to load __fn_local_NAME into $2
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# and emit a dummy relocation against NAME. This macro is always
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# used at the start of a function.
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.macro la_shared,name
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.reloc 0,R_MIPS_NONE,\name
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.cpload $25
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la $2,__fn_local_\name
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.endm
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# Use TYPE (either LSTUB, HSTUB or GSTUB) to define functions
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# called a_NAME and b_NAME. The former uses absolute accesses
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# and the latter uses PIC accesses.
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.macro decl,name,type
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\type a_\name, noshared
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\type b_\name, shared
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.endm
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# Emit the MIPS16 PIC sequence for setting $28 from $25.
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# Make the value of $25 available in $2 as well.
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.macro cpload_mips16
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li $2,%hi(_gp_disp)
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addiu $3,$pc,%lo(_gp_disp)
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sll $2,16
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addu $2,$2,$3
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move $28,$2
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.endm
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# Likewise, but for non-MIPS16 code.
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.macro cpload_nomips16
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.cpload $25
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move $2,$28
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.endm
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# Start a PIC function in ISA mode MODE, which is either "mips16"
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# or "nomips16".
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.macro pic_prologue,mode
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cpload_\mode
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addiu $sp,$sp,-32
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sw $2,16($sp)
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sw $31,20($sp)
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.endm
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# Use a PIC function to call NAME.
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.macro pic_call,name,mode
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.ifdef local_\name
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.ifc \mode,mips16
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lw $2,%got(__fn_local_\name)($2)
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addiu $2,%lo(__fn_local_\name)
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.else
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lw $2,%got(\name)($2)
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addiu $2,%lo(\name)
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.endif
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.else
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lw $2,%call16(\name)($2)
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.endif
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jalr $2
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move $25,$2
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lw $2,16($sp)
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move $28,$2
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.endm
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# Finish a PIC function started by pic_prologue.
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.macro pic_epilogue
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lw $2,20($sp)
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jr $2
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addiu $sp,$sp,32
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.endm
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# Use PIC %call16 sequences to call a_NAME and b_NAME.
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# MODE selects the ISA mode of the code: either "mips16"
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# or "nomips16".
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.macro callpic,name,mode
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.text
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.set \mode
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.ent callpic_\name\()_\mode
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callpic_\name\()_\mode:
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pic_prologue \mode
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pic_call a_\name,\mode
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pic_call b_\name,\mode
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pic_epilogue
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.end callpic_\name\()_\mode
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.endm
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# Use absolute jals to call a_NAME and b_NAME. MODE selects the
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# ISA mode of the code: either "mips16" or "nomips16".
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.macro jals,name,mode
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.text
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.set \mode
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.ent jals_\name\()_\mode
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jals_\name\()_\mode:
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.option pic0
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jal a_\name
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nop
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jal b_\name
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nop
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.option pic2
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.end jals_\name\()_\mode
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.endm
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