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| author | Maciej W. Rozycki <macro@imgtec.com> | 2016-06-28 01:23:36 +0100 |
|---|---|---|
| committer | Maciej W. Rozycki <macro@imgtec.com> | 2016-06-28 01:29:56 +0100 |
| commit | c9775dde32773c57d4eb5dfb4265eda9cb8adbe8 (patch) | |
| tree | 59735930ba2df8d7a5e885c7d388b45e341ecd04 /bfd/elf64-mips.c | |
| parent | bac13b9c13a0169aea400335776310b1f1ff2d16 (diff) | |
| download | gdb-c9775dde32773c57d4eb5dfb4265eda9cb8adbe8.zip gdb-c9775dde32773c57d4eb5dfb4265eda9cb8adbe8.tar.gz gdb-c9775dde32773c57d4eb5dfb4265eda9cb8adbe8.tar.bz2 | |
MIPS16: Add R_MIPS16_PC16_S1 branch relocation support
For R_MIPS16_PC16_S1 the calculation is `(sign_extend(A) + S - P) >> 1'
and the usual MIPS16 bit shuffling applies to relocated field handling,
as per the encoding of the branch target in the extended form of the
MIPS16 B, BEQZ, BNEZ, BTEQZ and BTNEZ instructions.
include/
* elf/mips.h (R_MIPS16_PC16_S1): New relocation.
bfd/
* elf32-mips.c (elf_mips16_howto_table_rel): Add
R_MIPS16_PC16_S1.
(mips16_reloc_map): Likewise.
* elf64-mips.c (mips16_elf64_howto_table_rel): Likewise.
(mips16_elf64_howto_table_rela): Likewise.
(mips16_reloc_map): Likewise.
* elfn32-mips.c (elf_mips16_howto_table_rel): Likewise.
(elf_mips16_howto_table_rela): Likewise.
(mips16_reloc_map): Likewise.
* elfxx-mips.c (mips16_branch_reloc_p): New function.
(mips16_reloc_p): Handle R_MIPS16_PC16_S1.
(b_reloc_p): Likewise.
(mips_elf_calculate_relocation): Likewise.
(_bfd_mips_elf_check_relocs): Likewise.
* reloc.c (BFD_RELOC_MIPS16_16_PCREL_S1): New relocation.
* bfd-in2.h: Regenerate.
* libbfd.h: Regenerate.
gas/
* config/tc-mips.c (mips16_reloc_p): Handle
BFD_RELOC_MIPS16_16_PCREL_S1.
(b_reloc_p): Likewise.
(limited_pcrel_reloc_p): Likewise.
(md_pcrel_from): Likewise.
(md_apply_fix): Likewise.
(tc_gen_reloc): Likewise.
(md_convert_frag): Likewise.
(mips_fix_adjustable): Update comment.
* testsuite/gas/mips/mips16-branch-reloc-2.d: Remove error
output, add dump patterns.
* testsuite/gas/mips/mips16-branch-reloc-3.d: Remove error
output, add dump patterns.
* testsuite/gas/mips/mips16-branch-addend-2.d: Remove error
output, add dump patterns.
* testsuite/gas/mips/mips16-branch-addend-3.d: Remove error
output, add dump patterns.
* testsuite/gas/mips/mips16-branch-absolute.d: Remove error
output, add dump patterns.
* testsuite/gas/mips/mips16-branch-reloc-2.l: Remove file.
* testsuite/gas/mips/mips16-branch-reloc-3.l: Remove file.
* testsuite/gas/mips/mips16-branch-addend-2.l: Remove file.
* testsuite/gas/mips/mips16-branch-addend-3.l: Remove file.
* testsuite/gas/mips/mips16-branch-absolute.l: Remove file.
* testsuite/gas/mips/mips16-branch-addend-2.s: Add padding.
* testsuite/gas/mips/branch-weak.s: Adjust alignment, avoid
implicit instruction padding, avoid MIPS16 JR->JRC conversion.
* testsuite/gas/mips/branch-weak-6.d: New test.
* testsuite/gas/mips/branch-weak-7.d: New test.
* testsuite/gas/mips/mips.exp: Run the new tests.
ld/
* testsuite/ld-mips-elf/mips16-branch-2.d: New test.
* testsuite/ld-mips-elf/mips16-branch-3.d: New test.
* testsuite/ld-mips-elf/mips16-branch-addend-2.d: New test.
* testsuite/ld-mips-elf/mips16-branch-addend-3.d: New test.
* testsuite/ld-mips-elf/mips16-branch.s: New test source.
* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
Diffstat (limited to 'bfd/elf64-mips.c')
| -rw-r--r-- | bfd/elf64-mips.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/bfd/elf64-mips.c b/bfd/elf64-mips.c index 34144f0..f04c4b5 100644 --- a/bfd/elf64-mips.c +++ b/bfd/elf64-mips.c @@ -1881,6 +1881,21 @@ static reloc_howto_type mips16_elf64_howto_table_rel[] = 0x0000ffff, /* src_mask */ 0x0000ffff, /* dst_mask */ FALSE), /* pcrel_offset */ + + /* MIPS16 16-bit PC-relative branch offset. */ + HOWTO (R_MIPS16_PC16_S1, /* type */ + 1, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + _bfd_mips_elf_generic_reloc, /* special_function */ + "R_MIPS16_PC16_S1", /* name */ + TRUE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + TRUE), /* pcrel_offset */ }; static reloc_howto_type mips16_elf64_howto_table_rela[] = @@ -2082,6 +2097,21 @@ static reloc_howto_type mips16_elf64_howto_table_rela[] = 0, /* src_mask */ 0x0000ffff, /* dst_mask */ FALSE), /* pcrel_offset */ + + /* MIPS16 16-bit PC-relative branch offset. */ + HOWTO (R_MIPS16_PC16_S1, /* type */ + 1, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + _bfd_mips_elf_generic_reloc, /* special_function */ + "R_MIPS16_PC16_S1", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + TRUE), /* pcrel_offset */ }; static reloc_howto_type micromips_elf64_howto_table_rel[] = @@ -3415,7 +3445,8 @@ static const struct elf_reloc_map mips16_reloc_map[] = R_MIPS16_TLS_DTPREL_LO16 - R_MIPS16_min }, { BFD_RELOC_MIPS16_TLS_GOTTPREL, R_MIPS16_TLS_GOTTPREL - R_MIPS16_min }, { BFD_RELOC_MIPS16_TLS_TPREL_HI16, R_MIPS16_TLS_TPREL_HI16 - R_MIPS16_min }, - { BFD_RELOC_MIPS16_TLS_TPREL_LO16, R_MIPS16_TLS_TPREL_LO16 - R_MIPS16_min } + { BFD_RELOC_MIPS16_TLS_TPREL_LO16, R_MIPS16_TLS_TPREL_LO16 - R_MIPS16_min }, + { BFD_RELOC_MIPS16_16_PCREL_S1, R_MIPS16_PC16_S1 - R_MIPS16_min } }; static const struct elf_reloc_map micromips_reloc_map[] = |