mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
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.
148 lines
3.0 KiB
PHP
148 lines
3.0 KiB
PHP
# Declare a function called NAME and an __fn_NAME stub for it.
|
|
# Make the stub use la_TYPE to load the the target address into $2.
|
|
.macro stub,name,type
|
|
.set nomips16
|
|
.section .mips16.fn.\name, "ax", @progbits
|
|
.ent __fn_\name
|
|
__fn_\name:
|
|
la_\type \name
|
|
mfc1 $4,$f12
|
|
jr $2
|
|
nop
|
|
.end __fn_\name
|
|
|
|
.set mips16
|
|
.text
|
|
.ent \name
|
|
\name:
|
|
__fn_local_\name:
|
|
jr $31
|
|
nop
|
|
.end \name
|
|
.endm
|
|
|
|
# Like stub, but ensure NAME is a local symbol.
|
|
.macro lstub,name,type
|
|
stub \name, \type
|
|
.equ local_\name,1
|
|
.endm
|
|
|
|
# Like stub, but ensure NAME is a hidden symbol.
|
|
.macro hstub,name,type
|
|
.globl \name
|
|
.hidden \name
|
|
stub \name, \type
|
|
.endm
|
|
|
|
# Like lstub, but make the MIPS16 function global rather than local.
|
|
.macro gstub,name,type
|
|
.globl \name
|
|
stub \name, \type
|
|
.endm
|
|
|
|
# Use an absolute sequence to load NAME into a register.
|
|
.macro la_noshared,name
|
|
lui $2,%hi(\name)
|
|
addiu $2,$2,%lo(\name)
|
|
.endm
|
|
|
|
# Use the normal PIC sequence to load __fn_local_NAME into $2
|
|
# and emit a dummy relocation against NAME. This macro is always
|
|
# used at the start of a function.
|
|
.macro la_shared,name
|
|
.reloc 0,R_MIPS_NONE,\name
|
|
.cpload $25
|
|
la $2,__fn_local_\name
|
|
.endm
|
|
|
|
# Use TYPE (either LSTUB, HSTUB or GSTUB) to define functions
|
|
# called a_NAME and b_NAME. The former uses absolute accesses
|
|
# and the latter uses PIC accesses.
|
|
.macro decl,name,type
|
|
\type a_\name, noshared
|
|
\type b_\name, shared
|
|
.endm
|
|
|
|
# Emit the MIPS16 PIC sequence for setting $28 from $25.
|
|
# Make the value of $25 available in $2 as well.
|
|
.macro cpload_mips16
|
|
li $2,%hi(_gp_disp)
|
|
addiu $3,$pc,%lo(_gp_disp)
|
|
sll $2,16
|
|
addu $2,$2,$3
|
|
move $28,$2
|
|
.endm
|
|
|
|
# Likewise, but for non-MIPS16 code.
|
|
.macro cpload_nomips16
|
|
.cpload $25
|
|
move $2,$28
|
|
.endm
|
|
|
|
# Start a PIC function in ISA mode MODE, which is either "mips16"
|
|
# or "nomips16".
|
|
.macro pic_prologue,mode
|
|
cpload_\mode
|
|
addiu $sp,$sp,-32
|
|
sw $2,16($sp)
|
|
sw $31,20($sp)
|
|
.endm
|
|
|
|
# Use a PIC function to call NAME.
|
|
.macro pic_call,name,mode
|
|
.ifdef local_\name
|
|
.ifc \mode,mips16
|
|
lw $2,%got(__fn_local_\name)($2)
|
|
addiu $2,%lo(__fn_local_\name)
|
|
.else
|
|
lw $2,%got(\name)($2)
|
|
addiu $2,%lo(\name)
|
|
.endif
|
|
.else
|
|
lw $2,%call16(\name)($2)
|
|
.endif
|
|
jalr $2
|
|
move $25,$2
|
|
lw $2,16($sp)
|
|
move $28,$2
|
|
.endm
|
|
|
|
# Finish a PIC function started by pic_prologue.
|
|
.macro pic_epilogue
|
|
lw $2,20($sp)
|
|
jr $2
|
|
addiu $sp,$sp,32
|
|
.endm
|
|
|
|
# Use PIC %call16 sequences to call a_NAME and b_NAME.
|
|
# MODE selects the ISA mode of the code: either "mips16"
|
|
# or "nomips16".
|
|
.macro callpic,name,mode
|
|
.text
|
|
.set \mode
|
|
.ent callpic_\name\()_\mode
|
|
callpic_\name\()_\mode:
|
|
pic_prologue \mode
|
|
pic_call a_\name,\mode
|
|
pic_call b_\name,\mode
|
|
pic_epilogue
|
|
.end callpic_\name\()_\mode
|
|
.endm
|
|
|
|
# Use absolute jals to call a_NAME and b_NAME. MODE selects the
|
|
# ISA mode of the code: either "mips16" or "nomips16".
|
|
.macro jals,name,mode
|
|
.text
|
|
.set \mode
|
|
.ent jals_\name\()_\mode
|
|
jals_\name\()_\mode:
|
|
.option pic0
|
|
jal a_\name
|
|
nop
|
|
|
|
jal b_\name
|
|
nop
|
|
.option pic2
|
|
.end jals_\name\()_\mode
|
|
.endm
|