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| author | Nick Clifton <nickc@redhat.com> | 2003-12-19 11:44:01 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2003-12-19 11:44:01 +0000 |
| commit | 6edf0760c5c65c9f0582c5d8036bfa058f2cd6c2 (patch) | |
| tree | 475a1c15199a9a645d40a11faddc392816d6e35c /bfd/elf32-m32r.c | |
| parent | c4bf77942dea9cad22426964bf32c46cbc443705 (diff) | |
| download | gdb-6edf0760c5c65c9f0582c5d8036bfa058f2cd6c2.zip gdb-6edf0760c5c65c9f0582c5d8036bfa058f2cd6c2.tar.gz gdb-6edf0760c5c65c9f0582c5d8036bfa058f2cd6c2.tar.bz2 | |
Add support for m32r-linux target, including a RELA ABI and PIC.
Diffstat (limited to 'bfd/elf32-m32r.c')
| -rw-r--r-- | bfd/elf32-m32r.c | 2754 |
1 files changed, 2716 insertions, 38 deletions
diff --git a/bfd/elf32-m32r.c b/bfd/elf32-m32r.c index 2794ffb..3edf4a9 100644 --- a/bfd/elf32-m32r.c +++ b/bfd/elf32-m32r.c @@ -44,6 +44,8 @@ static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); static void m32r_info_to_howto_rel PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); +static void m32r_info_to_howto + PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); bfd_boolean _bfd_m32r_elf_section_from_bfd_section PARAMS ((bfd *, asection *, int *)); void _bfd_m32r_elf_symbol_processing @@ -77,10 +79,34 @@ static bfd_boolean m32r_elf_check_relocs PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); +static bfd_boolean m32r_elf_adjust_dynamic_symbol + PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); +static bfd_boolean m32r_elf_size_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); + asection * m32r_elf_gc_mark_hook PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *)); +static bfd_boolean m32r_elf_create_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); + +static bfd_boolean m32r_elf_finish_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); + +static bfd_boolean m32r_elf_finish_dynamic_symbol + PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, + Elf_Internal_Sym *)); + +static bfd_boolean allocate_dynrelocs + PARAMS ((struct elf_link_hash_entry *, PTR)); +static bfd_boolean readonly_dynrelocs + PARAMS ((struct elf_link_hash_entry *, PTR)); +static enum elf_reloc_type_class m32r_elf_reloc_type_class + PARAMS ((const Elf_Internal_Rela *)); +static bfd_boolean m32r_elf_fake_sections + PARAMS ((bfd *, Elf_Internal_Shdr *, asection *)); + #define NOP_INSN 0x7000 #define MAKE_PARALLEL(insn) ((insn) | 0x8000) @@ -88,11 +114,55 @@ asection * m32r_elf_gc_mark_hook This only saves space in libraries and object files, but perhaps relocs will be put in ROM? All in all though, REL relocs are a pain to work with. */ -#define USE_REL 1 +/* #define USE_REL 1 #ifndef USE_REL #define USE_REL 0 -#endif +#endif */ +/* Use RELA. But use REL to link old objects for backwords compatibility. */ + +/* Functions for the M32R ELF linker. */ + +/* The name of the dynamic interpreter. This is put in the .interp + section. */ + +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" + +/* The nop opcode we use. */ + +#define M32R_NOP 0x7000f000 + +#define PLT_EMPTY 0x10101010 /* RIE -> RIE */ + +/* The size in bytes of an entry in the procedure linkage table. */ + +#define PLT_ENTRY_SIZE 20 +#define PLT_HEADER_SIZE 20 + +/* The first one entries in a procedure linkage table are reserved, + and the initial contents are unimportant (we zero them out). + Subsequent entries look like this. */ + +#define PLT0_ENTRY_WORD0 0xd6c00000 /* seth r6, #high(.got+4) */ +#define PLT0_ENTRY_WORD1 0x86e60000 /* or3 r6, r6, #low(.got)+4) */ +#define PLT0_ENTRY_WORD2 0x24e626c6 /* ld r4, @r6+ -> ld r6, @r6 */ +#define PLT0_ENTRY_WORD3 0x1fc6f000 /* jmp r6 || pnop */ +#define PLT0_ENTRY_WORD4 PLT_EMPTY /* RIE -> RIE */ + +#define PLT0_PIC_ENTRY_WORD0 0xa4cc0004 /* ld r4, @(4,r12) */ +#define PLT0_PIC_ENTRY_WORD1 0xa6cc0008 /* ld r6, @(8,r12) */ +#define PLT0_PIC_ENTRY_WORD2 0x1fc6f000 /* jmp r6 || nop */ +#define PLT0_PIC_ENTRY_WORD3 PLT_EMPTY /* RIE -> RIE */ +#define PLT0_PIC_ENTRY_WORD4 PLT_EMPTY /* RIE -> RIE */ + +#define PLT_ENTRY_WORD0 0xe6000000 /* ld24 r6, .name_in_GOT */ +#define PLT_ENTRY_WORD1 0x06acf000 /* add r6, r12 || nop */ +#define PLT_ENTRY_WORD0b 0xd6c00000 /* seth r6, #high(.name_in_GOT) */ +#define PLT_ENTRY_WORD1b 0x86e60000 /* or3 r6, r6, #low(.name_in_GOT) */ +#define PLT_ENTRY_WORD2 0x26c61fc6 /* ld r6, @r6 -> jmp r6 */ +#define PLT_ENTRY_WORD3 0xe5000000 /* ld24 r5, $offset */ +#define PLT_ENTRY_WORD4 0xff000000 /* bra .plt0. */ + static reloc_howto_type m32r_elf_howto_table[] = { @@ -302,6 +372,437 @@ static reloc_howto_type m32r_elf_howto_table[] = 0, /* dst_mask */ FALSE), /* pcrel_offset */ + EMPTY_HOWTO (13), + EMPTY_HOWTO (14), + EMPTY_HOWTO (15), + EMPTY_HOWTO (16), + EMPTY_HOWTO (17), + EMPTY_HOWTO (18), + EMPTY_HOWTO (19), + EMPTY_HOWTO (20), + EMPTY_HOWTO (21), + EMPTY_HOWTO (22), + EMPTY_HOWTO (23), + EMPTY_HOWTO (24), + EMPTY_HOWTO (25), + EMPTY_HOWTO (26), + EMPTY_HOWTO (27), + EMPTY_HOWTO (28), + EMPTY_HOWTO (29), + EMPTY_HOWTO (30), + EMPTY_HOWTO (31), + EMPTY_HOWTO (32), + + /* A 16 bit absolute relocation. */ + HOWTO (R_M32R_16_RELA, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_16_RELA", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 32 bit absolute relocation. */ + HOWTO (R_M32R_32_RELA, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc,/* special_function */ + "R_M32R_32_RELA", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 24 bit address. */ + HOWTO (R_M32R_24_RELA, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 24, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_unsigned, /* complain_on_overflow */ + bfd_elf_generic_reloc,/* special_function */ + "R_M32R_24_RELA", /* name */ + FALSE, /* partial_inplace */ + 0xffffff, /* src_mask */ + 0xffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_M32R_10_PCREL_RELA, /* type */ + 2, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 10, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + m32r_elf_10_pcrel_reloc, /* special_function */ + "R_M32R_10_PCREL_RELA",/* name */ + FALSE, /* partial_inplace */ + 0xff, /* src_mask */ + 0xff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A relative 18 bit relocation, right shifted by 2. */ + HOWTO (R_M32R_18_PCREL_RELA, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_18_PCREL_RELA",/* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A relative 26 bit relocation, right shifted by 2. */ + HOWTO (R_M32R_26_PCREL_RELA, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_26_PCREL_RELA",/* name */ + FALSE, /* partial_inplace */ + 0xffffff, /* src_mask */ + 0xffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* High 16 bits of address when lower 16 is or'd in. */ + HOWTO (R_M32R_HI16_ULO_RELA, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_HI16_ULO_RELA",/* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* High 16 bits of address when lower 16 is added in. */ + HOWTO (R_M32R_HI16_SLO_RELA, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_HI16_SLO_RELA",/* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Lower 16 bits of address. */ + HOWTO (R_M32R_LO16_RELA, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_LO16_RELA", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Small data area 16 bits offset. */ + HOWTO (R_M32R_SDA16_RELA, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_SDA16_RELA", /* name */ + TRUE, /* partial_inplace */ /* FIXME: correct? */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable hierarchy */ + HOWTO (R_M32R_RELA_GNU_VTINHERIT, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_M32R_RELA_GNU_VTINHERIT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable member usage */ + HOWTO (R_M32R_RELA_GNU_VTENTRY, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + _bfd_elf_rel_vtable_reloc_fn, /* special_function */ + "R_M32R_RELA_GNU_VTENTRY", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + EMPTY_HOWTO (45), + EMPTY_HOWTO (46), + EMPTY_HOWTO (47), + + /* Like R_M32R_24, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_M32R_GOT24, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 24, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_unsigned, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_GOT24", /* name */ + FALSE, /* partial_inplace */ + 0xffffff, /* src_mask */ + 0xffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_M32R_PCREL, but referring to the procedure linkage table + entry for the symbol. */ + HOWTO (R_M32R_26_PLTREL, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 24, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_26_PLTREL", /* name */ + FALSE, /* partial_inplace */ + 0xffffff, /* src_mask */ + 0xffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* This is used only by the dynamic linker. The symbol should exist + both in the object being run and in some shared library. The + dynamic linker copies the data addressed by the symbol from the + shared library into the object, because the object being + run has to have the data at some particular address. */ + HOWTO (R_M32R_COPY, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_COPY", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_M32R_24, but used when setting global offset table + entries. */ + HOWTO (R_M32R_GLOB_DAT, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_GLOB_DAT", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Marks a procedure linkage table entry for a symbol. */ + HOWTO (R_M32R_JMP_SLOT, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_JMP_SLOT", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Used only by the dynamic linker. When the object is run, this + longword is set to the load address of the object, plus the + addend. */ + HOWTO (R_M32R_RELATIVE, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_RELATIVE", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_M32R_GOTOFF, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_GOTOFF", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* An PC Relative 24-bit relocation used when setting PIC offset + table register. */ + HOWTO (R_M32R_GOTPC24, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 24, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_unsigned, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_GOTPC24", /* name */ + FALSE, /* partial_inplace */ + 0xffffff, /* src_mask */ + 0xffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* Like R_M32R_HI16_ULO, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_M32R_GOT16_HI_ULO, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_GOT16_HI_ULO", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_M32R_HI16_SLO, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_M32R_GOT16_HI_SLO, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_GOT16_HI_SLO", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_M32R_LO16, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_M32R_GOT16_LO, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_GOT16_LO", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* An PC Relative relocation used when setting PIC offset table register. + Like R_M32R_HI16_ULO, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_M32R_GOTPC_HI_ULO, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_GOTPC_HI_ULO", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* An PC Relative relocation used when setting PIC offset table register. + Like R_M32R_HI16_SLO, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_M32R_GOTPC_HI_SLO, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_GOTPC_HI_SLO", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* An PC Relative relocation used when setting PIC offset table register. + Like R_M32R_LO16, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_M32R_GOTPC_LO, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_M32R_GOTPC_LO", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + TRUE), /* pcrel_offset */ }; /* Handle the R_M32R_10_PCREL reloc. */ @@ -715,7 +1216,7 @@ struct m32r_reloc_map unsigned char elf_reloc_val; }; -static const struct m32r_reloc_map m32r_reloc_map[] = +static const struct m32r_reloc_map m32r_reloc_map_old[] = { { BFD_RELOC_NONE, R_M32R_NONE }, { BFD_RELOC_16, R_M32R_16 }, @@ -732,6 +1233,38 @@ static const struct m32r_reloc_map m32r_reloc_map[] = { BFD_RELOC_VTABLE_ENTRY, R_M32R_GNU_VTENTRY }, }; +static const struct m32r_reloc_map m32r_reloc_map[] = +{ + { BFD_RELOC_NONE, R_M32R_NONE }, + { BFD_RELOC_16, R_M32R_16_RELA }, + { BFD_RELOC_32, R_M32R_32_RELA }, + { BFD_RELOC_M32R_24, R_M32R_24_RELA }, + { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL_RELA }, + { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL_RELA }, + { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL_RELA }, + { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO_RELA }, + { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO_RELA }, + { BFD_RELOC_M32R_LO16, R_M32R_LO16_RELA }, + { BFD_RELOC_M32R_SDA16, R_M32R_SDA16_RELA }, + { BFD_RELOC_VTABLE_INHERIT, R_M32R_RELA_GNU_VTINHERIT }, + { BFD_RELOC_VTABLE_ENTRY, R_M32R_RELA_GNU_VTENTRY }, + + { BFD_RELOC_M32R_GOT24, R_M32R_GOT24 }, + { BFD_RELOC_M32R_26_PLTREL, R_M32R_26_PLTREL }, + { BFD_RELOC_M32R_COPY, R_M32R_COPY }, + { BFD_RELOC_M32R_GLOB_DAT, R_M32R_GLOB_DAT }, + { BFD_RELOC_M32R_JMP_SLOT, R_M32R_JMP_SLOT }, + { BFD_RELOC_M32R_RELATIVE, R_M32R_RELATIVE }, + { BFD_RELOC_M32R_GOTOFF, R_M32R_GOTOFF }, + { BFD_RELOC_M32R_GOTPC24, R_M32R_GOTPC24 }, + { BFD_RELOC_M32R_GOT16_HI_ULO, R_M32R_GOT16_HI_ULO }, + { BFD_RELOC_M32R_GOT16_HI_SLO, R_M32R_GOT16_HI_SLO }, + { BFD_RELOC_M32R_GOT16_LO, R_M32R_GOT16_LO }, + { BFD_RELOC_M32R_GOTPC_HI_ULO, R_M32R_GOTPC_HI_ULO }, + { BFD_RELOC_M32R_GOTPC_HI_SLO, R_M32R_GOTPC_HI_SLO }, + { BFD_RELOC_M32R_GOTPC_LO, R_M32R_GOTPC_LO }, +}; + static reloc_howto_type * bfd_elf32_bfd_reloc_type_lookup (abfd, code) bfd *abfd ATTRIBUTE_UNUSED; @@ -739,6 +1272,16 @@ bfd_elf32_bfd_reloc_type_lookup (abfd, code) { unsigned int i; +#ifdef USE_M32R_OLD_RELOC + for (i = 0; + i < sizeof (m32r_reloc_map_old) / sizeof (struct m32r_reloc_map); + i++) + { + if (m32r_reloc_map_old[i].bfd_reloc_val == code) + return &m32r_elf_howto_table[m32r_reloc_map_old[i].elf_reloc_val]; + } +#else /* ! USE_M32R_OLD_RELOC */ + for (i = 0; i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map); i++) @@ -746,6 +1289,7 @@ bfd_elf32_bfd_reloc_type_lookup (abfd, code) if (m32r_reloc_map[i].bfd_reloc_val == code) return &m32r_elf_howto_table[m32r_reloc_map[i].elf_reloc_val]; } +#endif return NULL; } @@ -761,9 +1305,22 @@ m32r_info_to_howto_rel (abfd, cache_ptr, dst) unsigned int r_type; r_type = ELF32_R_TYPE (dst->r_info); - BFD_ASSERT (r_type < (unsigned int) R_M32R_max); + BFD_ASSERT (ELF32_R_TYPE(dst->r_info) <= (unsigned int) R_M32R_GNU_VTENTRY) cache_ptr->howto = &m32r_elf_howto_table[r_type]; } + +static void +m32r_info_to_howto (abfd, cache_ptr, dst) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *cache_ptr; + Elf_Internal_Rela *dst; +{ + BFD_ASSERT ((ELF32_R_TYPE(dst->r_info) == (unsigned int) R_M32R_NONE) + || ((ELF32_R_TYPE(dst->r_info) > (unsigned int) R_M32R_GNU_VTENTRY) + && (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_M32R_max))); + cache_ptr->howto = &m32r_elf_howto_table[ELF32_R_TYPE(dst->r_info)]; +} + /* Given a BFD section, try to locate the corresponding ELF section index. */ @@ -935,6 +1492,997 @@ m32r_elf_final_sda_base (output_bfd, info, error_message, psb) return bfd_reloc_ok; } +/* Return size of a PLT entry. */ +#define elf_m32r_sizeof_plt(info) PLT_ENTRY_SIZE + +/* The m32r linker needs to keep track of the number of relocs that it + decides to copy in check_relocs for each symbol. This is so that + it can discard PC relative relocs if it doesn't need them when + linking with -Bsymbolic. We store the information in a field + extending the regular ELF linker hash table. */ + +/* This structure keeps track of the number of PC relative relocs we + have copied for a given symbol. */ + +struct elf_m32r_pcrel_relocs_copied +{ + /* Next section. */ + struct elf_m32r_pcrel_relocs_copied *next; + /* A section in dynobj. */ + asection *section; + /* Number of relocs copied in this section. */ + bfd_size_type count; +}; + +/* The sh linker needs to keep track of the number of relocs that it + decides to copy as dynamic relocs in check_relocs for each symbol. + This is so that it can later discard them if they are found to be + unnecessary. We store the information in a field extending the + regular ELF linker hash table. */ + +struct elf_m32r_dyn_relocs +{ + struct elf_m32r_dyn_relocs *next; + + /* The input section of the reloc. */ + asection *sec; + + /* Total number of relocs copied for the input section. */ + bfd_size_type count; + + /* Number of pc-relative relocs copied for the input section. */ + bfd_size_type pc_count; +}; + + +/* m32r ELF linker hash entry. */ + +struct elf_m32r_link_hash_entry +{ + struct elf_link_hash_entry root; + + /* Track dynamic relocs copied for this symbol. */ + struct elf_m32r_dyn_relocs *dyn_relocs; + +// bfd_signed_vma gotplt_refcount; + + /* Number of PC relative relocs copied for this symbol. */ + /* struct elf_m32r_pcrel_relocs_copied *pcrel_relocs_copied; FIXME */ +}; + +/* m32r ELF linker hash table. */ + +struct elf_m32r_link_hash_table +{ + struct elf_link_hash_table root; + + /* Short-cuts to get to dynamic linker sections. */ + asection *sgot; + asection *sgotplt; + asection *srelgot; + asection *splt; + asection *srelplt; + asection *sdynbss; + asection *srelbss; + + /* Small local sym to section mapping cache. */ + struct sym_sec_cache sym_sec; +}; + +/* Traverse an m32r ELF linker hash table. */ + +#define m32r_elf_link_hash_traverse(table, func, info) \ + (elf_link_hash_traverse \ + (&(table)->root, \ + (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ + (info))) + +/* Get the m32r ELF linker hash table from a link_info structure. */ + + +#define m32r_elf_hash_table(p) \ + ((struct elf_m32r_link_hash_table *) ((p)->hash)) + +/* Create an entry in an m32r ELF linker hash table. */ +static struct bfd_hash_entry * +m32r_elf_link_hash_newfunc (struct bfd_hash_entry *, struct bfd_hash_table *, + const char * ); + +static struct bfd_hash_entry * +m32r_elf_link_hash_newfunc (entry, table, string) + struct bfd_hash_entry *entry; + struct bfd_hash_table *table; + const char *string; +{ + struct elf_m32r_link_hash_entry *ret = + (struct elf_m32r_link_hash_entry *) entry; + + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (ret == (struct elf_m32r_link_hash_entry *) NULL) + ret = ((struct elf_m32r_link_hash_entry *) + bfd_hash_allocate (table, + sizeof (struct elf_m32r_link_hash_entry))); + if (ret == (struct elf_m32r_link_hash_entry *) NULL) + return (struct bfd_hash_entry *) ret; + + /* Call the allocation method of the superclass. */ + ret = ((struct elf_m32r_link_hash_entry *) + _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, + table, string)); + if (ret != (struct elf_m32r_link_hash_entry *) NULL) + { + struct elf_m32r_link_hash_entry *eh; + + eh = (struct elf_m32r_link_hash_entry *) ret; + eh->dyn_relocs = NULL; +// eh->gotplt_refcount = 0; + /* eh->pcrel_relocs_copied = NULL; FIXME */ + } + + return (struct bfd_hash_entry *) ret; +} + +/* Create an m32r ELF linker hash table. */ +static struct bfd_link_hash_table *m32r_elf_link_hash_table_create (bfd *); + +static struct bfd_link_hash_table * +m32r_elf_link_hash_table_create (abfd) + bfd *abfd; +{ + struct elf_m32r_link_hash_table *ret; + bfd_size_type amt = sizeof (struct elf_m32r_link_hash_table); + + ret = (struct elf_m32r_link_hash_table *) bfd_malloc (amt); + if (ret == (struct elf_m32r_link_hash_table *) NULL) + return NULL; + + if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, + m32r_elf_link_hash_newfunc)) + { + free (ret); + return NULL; + } + + ret->sgot = NULL; + ret->sgotplt = NULL; + ret->srelgot = NULL; + ret->splt = NULL; + ret->srelplt = NULL; + ret->sdynbss = NULL; + ret->srelbss = NULL; + ret->sym_sec.abfd = NULL; + + return &ret->root.root; +} + +/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up + shortcuts to them in our hash table. */ +static bfd_boolean create_got_section (bfd *, struct bfd_link_info *); + +static bfd_boolean +create_got_section (dynobj, info) + bfd *dynobj; + struct bfd_link_info *info; +{ + struct elf_m32r_link_hash_table *htab; + + if (! _bfd_elf_create_got_section (dynobj, info)) + return FALSE; + + htab = m32r_elf_hash_table (info); + htab->sgot = bfd_get_section_by_name (dynobj, ".got"); + htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); + if (! htab->sgot || ! htab->sgotplt) + abort (); + + htab->srelgot = bfd_make_section (dynobj, ".rela.got"); + if (htab->srelgot == NULL + || ! bfd_set_section_flags (dynobj, htab->srelgot, + (SEC_ALLOC + | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | SEC_READONLY)) + || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) + return FALSE; + + return TRUE; +} + +/* Create dynamic sections when linking against a dynamic object. */ + +static bfd_boolean +m32r_elf_create_dynamic_sections (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + struct elf_m32r_link_hash_table *htab; + flagword flags, pltflags; + register asection *s; + const struct elf_backend_data *bed = get_elf_backend_data (abfd); + int ptralign = 2; /* 32bit */ + + htab = m32r_elf_hash_table (info); + + /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and + .rel[a].bss sections. */ + + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED); + + pltflags = flags; + pltflags |= SEC_CODE; + if (bed->plt_not_loaded) + pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); + if (bed->plt_readonly) + pltflags |= SEC_READONLY; + + s = bfd_make_section (abfd, ".plt"); + htab->splt = s; + if (s == NULL + || ! bfd_set_section_flags (abfd, s, pltflags) + || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) + return FALSE; + + if (bed->want_plt_sym) + { + /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the + .plt section. */ + struct elf_link_hash_entry *h = NULL; + if (! (_bfd_generic_link_add_one_symbol + (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, + (bfd_vma) 0, (const char *) NULL, FALSE, + get_elf_backend_data (abfd)->collect, + (struct bfd_link_hash_entry **) &h))) + return FALSE; + h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; + h->type = STT_OBJECT; + + if (info->shared + && ! _bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + s = bfd_make_section (abfd, + bed->default_use_rela_p ? ".rela.plt" : ".rel.plt"); + htab->srelplt = s; + if (s == NULL + || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) + || ! bfd_set_section_alignment (abfd, s, ptralign)) + return FALSE; + + if (htab->sgot == NULL + && ! create_got_section (abfd, info)) + return FALSE; + + { + const char *secname; + char *relname; + flagword secflags; + asection *sec; + + for (sec = abfd->sections; sec; sec = sec->next) + { + secflags = bfd_get_section_flags (abfd, sec); + if ((secflags & (SEC_DATA | SEC_LINKER_CREATED)) + || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS)) + continue; + secname = bfd_get_section_name (abfd, sec); + relname = (char *) bfd_malloc ((bfd_size_type) strlen (secname) + 6); + strcpy (relname, ".rela"); + strcat (relname, secname); + if (bfd_get_section_by_name (abfd, secname)) + continue; + s = bfd_make_section (abfd, relname); + if (s == NULL + || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) + || ! bfd_set_section_alignment (abfd, s, ptralign)) + return FALSE; + } + } + + if (bed->want_dynbss) + { + /* The .dynbss section is a place to put symbols which are defined + by dynamic objects, are referenced by regular objects, and are + not functions. We must allocate space for them in the process + image and use a R_*_COPY reloc to tell the dynamic linker to + initialize them at run time. The linker script puts the .dynbss + section into the .bss section of the final image. */ + s = bfd_make_section (abfd, ".dynbss"); + htab->sdynbss = s; + if (s == NULL + || ! bfd_set_section_flags (abfd, s, SEC_ALLOC)) + return FALSE; + /* The .rel[a].bss section holds copy relocs. This section is not + normally needed. We need to create it here, though, so that the + linker will map it to an output section. We can't just create it + only if we need it, because we will not know whether we need it + until we have seen all the input files, and the first time the + main linker code calls BFD after examining all the input files + (size_dynamic_sections) the input sections have already been + mapped to the output sections. If the section turns out not to + be needed, we can discard it later. We will never need this + section when generating a shared object, since they do not use + copy relocs. */ + if (! info->shared) + { + s = bfd_make_section (abfd, + (bed->default_use_rela_p + ? ".rela.bss" : ".rel.bss")); + htab->srelbss = s; + if (s == NULL + || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) + || ! bfd_set_section_alignment (abfd, s, ptralign)) + return FALSE; + } + } + + return TRUE; +} + +/* Copy the extra info we tack onto an elf_link_hash_entry. */ +static void m32r_elf_copy_indirect_symbol (const struct elf_backend_data *, + struct elf_link_hash_entry *, + struct elf_link_hash_entry *); + +static void +m32r_elf_copy_indirect_symbol (const struct elf_backend_data *bed, + struct elf_link_hash_entry *dir, + struct elf_link_hash_entry *ind) +{ + struct elf_m32r_link_hash_entry *edir, *eind; + + edir = (struct elf_m32r_link_hash_entry *) dir; + eind = (struct elf_m32r_link_hash_entry *) ind; + + if (eind->dyn_relocs != NULL) + { + if (edir->dyn_relocs != NULL) + { + struct elf_m32r_dyn_relocs **pp; + struct elf_m32r_dyn_relocs *p; + + if (ind->root.type == bfd_link_hash_indirect) + abort (); + + /* Add reloc counts against the weak sym to the strong sym + list. Merge any entries against the same section. */ + for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) + { + struct elf_m32r_dyn_relocs *q; + + for (q = edir->dyn_relocs; q != NULL; q = q->next) + if (q->sec == p->sec) + { + q->pc_count += p->pc_count; + q->count += p->count; + *pp = p->next; + break; + } + if (q == NULL) + pp = &p->next; + } + *pp = edir->dyn_relocs; + } + + edir->dyn_relocs = eind->dyn_relocs; + eind->dyn_relocs = NULL; + } + +// if (ind->root.type == bfd_link_hash_indirect +// && dir->got.refcount <= 0) +// { +// edir->tls_type = eind->tls_type; +// eind->tls_type = GOT_UNKNOWN; +// } + _bfd_elf_link_hash_copy_indirect (bed, dir, ind); +} + + +/* Adjust a symbol defined by a dynamic object and referenced by a + regular object. The current definition is in some section of the + dynamic object, but we're not including those sections. We have to + change the definition to something the rest of the link can + understand. */ + +static bfd_boolean +m32r_elf_adjust_dynamic_symbol (info, h) + struct bfd_link_info *info; + struct elf_link_hash_entry *h; +{ + struct elf_m32r_link_hash_table *htab; + struct elf_m32r_link_hash_entry *eh; + struct elf_m32r_dyn_relocs *p; + bfd *dynobj; + asection *s; + unsigned int power_of_two; + +#ifdef DEBUG_PIC +printf("m32r_elf_adjust_dynamic_symbol()\n"); +#endif + + dynobj = elf_hash_table (info)->dynobj; + + /* Make sure we know what is going on here. */ + BFD_ASSERT (dynobj != NULL + && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) + || h->weakdef != NULL + || ((h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_DYNAMIC) != 0 + && (h->elf_link_hash_flags + & ELF_LINK_HASH_REF_REGULAR) != 0 + && (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0))); + + + /* If this is a function, put it in the procedure linkage table. We + will fill in the contents of the procedure linkage table later, + when we know the address of the .got section. */ + if (h->type == STT_FUNC + || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) + { + if (! info->shared + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 + && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 + && h->root.type != bfd_link_hash_undefweak + && h->root.type != bfd_link_hash_undefined) + { + /* This case can occur if we saw a PLT reloc in an input + file, but the symbol was never referred to by a dynamic + object. In such a case, we don't actually need to build + a procedure linkage table, and we can just do a PCREL + reloc instead. */ + h->plt.offset = (bfd_vma) -1; + h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + } + + return TRUE; + } + else + h->plt.offset = (bfd_vma) -1; + + /* If this is a weak symbol, and there is a real definition, the + processor independent code will have arranged for us to see the + real definition first, and we can just use the same value. */ + if (h->weakdef != NULL) + { + BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined + || h->weakdef->root.type == bfd_link_hash_defweak); + h->root.u.def.section = h->weakdef->root.u.def.section; + h->root.u.def.value = h->weakdef->root.u.def.value; + return TRUE; + } + + /* This is a reference to a symbol defined by a dynamic object which + is not a function. */ + + /* If we are creating a shared library, we must presume that the + only references to the symbol are via the global offset table. + For such cases we need not do anything here; the relocations will + be handled correctly by relocate_section. */ + if (info->shared) + return TRUE; + + /* If there are no references to this symbol that do not use the + GOT, we don't need to generate a copy reloc. */ + if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) + return TRUE; + + /* If -z nocopyreloc was given, we won't generate them either. */ + if (info->nocopyreloc) + { + h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; + return TRUE; + } + + eh = (struct elf_m32r_link_hash_entry *) h; + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + s = p->sec->output_section; + if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0) + break; + } + + /* If we didn't find any dynamic relocs in sections which needs the + copy reloc, then we'll be keeping the dynamic relocs and avoiding + the copy reloc. */ + if (p == NULL) + { + h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; + return TRUE; + } + + /* We must allocate the symbol in our .dynbss section, which will + become part of the .bss section of the executable. There will be + an entry for this symbol in the .dynsym section. The dynamic + object will contain position independent code, so all references + from the dynamic object to this symbol will go through the global + offset table. The dynamic linker will use the .dynsym entry to + determine the address it must put in the global offset table, so + both the dynamic object and the regular object will refer to the + same memory location for the variable. */ + + htab = m32r_elf_hash_table (info); + s = htab->sdynbss; + BFD_ASSERT (s != NULL); + + /* We must generate a R_M32R_COPY reloc to tell the dynamic linker + to copy the initial value out of the dynamic object and into the + runtime process image. We need to remember the offset into the + .rela.bss section we are going to use. */ + if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) + { + asection *srel; + + srel = htab->srelbss; + BFD_ASSERT (srel != NULL); + srel->_raw_size += sizeof (Elf32_External_Rela); + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; + } + + /* We need to figure out the alignment required for this symbol. I + have no idea how ELF linkers handle this. */ + power_of_two = bfd_log2 (h->size); + if (power_of_two > 3) + power_of_two = 3; + + /* Apply the required alignment. */ + s->_raw_size = BFD_ALIGN (s->_raw_size, + (bfd_size_type) (1 << power_of_two)); + if (power_of_two > bfd_get_section_alignment (dynobj, s)) + { + if (! bfd_set_section_alignment (dynobj, s, power_of_two)) + return FALSE; + } + + /* Define the symbol as being at this point in the section. */ + h->root.u.def.section = s; + h->root.u.def.value = s->_raw_size; + + /* Increment the section size to make room for the symbol. */ + s->_raw_size += h->size; + + return TRUE; +} + +/* This is the condition under which finish_dynamic_symbol will be called + from elflink.h. If elflink.h doesn't call our finish_dynamic_symbol + routine, we'll need to do something about initializing any .plt and .got + entries in relocate_section. */ +#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ + ((DYN) \ + && ((INFO)->shared \ + || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ + && ((H)->dynindx != -1 \ + || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) + +/* Allocate space in .plt, .got and associated reloc sections for + dynamic relocs. */ + +static bfd_boolean +allocate_dynrelocs (h, inf) + struct elf_link_hash_entry *h; + PTR inf; +{ + struct bfd_link_info *info; + struct elf_m32r_link_hash_table *htab; + struct elf_m32r_link_hash_entry *eh; + struct elf_m32r_dyn_relocs *p; + + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + if (h->root.type == bfd_link_hash_warning) + /* When warning symbols are created, they **replace** the "real" + entry in the hash table, thus we never get to see the real + symbol in a hash traversal. So look at it now. */ + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + info = (struct bfd_link_info *) inf; + htab = m32r_elf_hash_table (info); + + eh = (struct elf_m32r_link_hash_entry *) h; +// if ((h->got.refcount > 0 +// || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) +// && eh->gotplt_refcount > 0) +// { +// /* The symbol has been forced local, or we have some direct got refs, +// so treat all the gotplt refs as got refs. */ +// h->got.refcount += eh->gotplt_refcount; +// if (h->plt.refcount >= eh->gotplt_refcount) +// h->plt.refcount -= eh->gotplt_refcount; +// } + + if (htab->root.dynamic_sections_created + && h->plt.refcount > 0) + { + /* Make sure this symbol is output as a dynamic symbol. + Undefined weak syms won't yet be marked as dynamic. */ + if (h->dynindx == -1 + && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) + { + if (! bfd_elf32_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) + { + asection *s = htab->splt; + + /* If this is the first .plt entry, make room for the special + first entry. */ + if (s->_raw_size == 0) + s->_raw_size += PLT_ENTRY_SIZE; + + h->plt.offset = s->_raw_size; + + /* If this symbol is not defined in a regular file, and we are + not generating a shared library, then set the symbol to this + location in the .plt. This is required to make function + pointers compare as equal between the normal executable and + the shared library. */ + if (! info->shared + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) + { + h->root.u.def.section = s; + h->root.u.def.value = h->plt.offset; + } + + /* Make room for this entry. */ + s->_raw_size += PLT_ENTRY_SIZE; + + /* We also need to make an entry in the .got.plt section, which + will be placed in the .got section by the linker script. */ + htab->sgotplt->_raw_size += 4; + + /* We also need to make an entry in the .rel.plt section. */ + htab->srelplt->_raw_size += sizeof (Elf32_External_Rela); + } + else + { + h->plt.offset = (bfd_vma) -1; + h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + } + } + else + { + h->plt.offset = (bfd_vma) -1; + h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + } + + if (h->got.refcount > 0) + { + asection *s; + bfd_boolean dyn; + + /* Make sure this symbol is output as a dynamic symbol. + Undefined weak syms won't yet be marked as dynamic. */ + if (h->dynindx == -1 + && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) + { + if (! bfd_elf32_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + s = htab->sgot; + + h->got.offset = s->_raw_size; + s->_raw_size += 4; + dyn = htab->root.dynamic_sections_created; + if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) + htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); + } + else + h->got.offset = (bfd_vma) -1; + + if (eh->dyn_relocs == NULL) + return TRUE; + + /* In the shared -Bsymbolic case, discard space allocated for + dynamic pc-relative relocs against symbols which turn out to be + defined in regular objects. For the normal shared case, discard + space for pc-relative relocs that have become local due to symbol + visibility changes. */ + + if (info->shared) + { + if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 + && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 + || info->symbolic)) + { + struct elf_m32r_dyn_relocs **pp; + for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) + { + p->count -= p->pc_count; + p->pc_count = 0; + if (p->count == 0) + *pp = p->next; + else + pp = &p->next; + } + } + } + else + { + /* For the non-shared case, discard space for relocs against + symbols which turn out to need copy relocs or are not + dynamic. */ + + if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 + && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) + || (htab->root.dynamic_sections_created + && (h->root.type == bfd_link_hash_undefweak + || h->root.type == bfd_link_hash_undefined)))) + { + /* Make sure this symbol is output as a dynamic symbol. + Undefined weak syms won't yet be marked as dynamic. */ + if (h->dynindx == -1 + && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) + { + if (! bfd_elf32_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + /* If that succeeded, we know we'll be keeping all the + relocs. */ + if (h->dynindx != -1) + goto keep; + } + + eh->dyn_relocs = NULL; + + keep: ; + } + + /* Finally, allocate space. */ + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + asection *sreloc = elf_section_data (p->sec)->sreloc; + sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela); + } + + return TRUE; +} +/* Find any dynamic relocs that apply to read-only sections. */ + +static bfd_boolean +readonly_dynrelocs (h, inf) + struct elf_link_hash_entry *h; + PTR inf; +{ + struct elf_m32r_link_hash_entry *eh; + struct elf_m32r_dyn_relocs *p; + + if (h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + eh = (struct elf_m32r_link_hash_entry *) h; + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + asection *s = p->sec->output_section; + + if (s != NULL && (s->flags & SEC_READONLY) != 0) + { + struct bfd_link_info *info = (struct bfd_link_info *) inf; + + info->flags |= DF_TEXTREL; + + /* Not an error, just cut short the traversal. */ + return FALSE; + } + } + return TRUE; +} + +/* Set the sizes of the dynamic sections. */ + +static bfd_boolean +m32r_elf_size_dynamic_sections (output_bfd, info) + bfd *output_bfd ATTRIBUTE_UNUSED; + struct bfd_link_info *info; +{ + struct elf_m32r_link_hash_table *htab; + bfd *dynobj; + asection *s; + bfd_boolean relocs; + bfd *ibfd; + +#ifdef DEBUG_PIC +printf("m32r_elf_size_dynamic_sections()\n"); +#endif + + htab = m32r_elf_hash_table (info); + dynobj = htab->root.dynobj; + BFD_ASSERT (dynobj != NULL); + + if (htab->root.dynamic_sections_created) + { + /* Set the contents of the .interp section to the interpreter. */ + if (! info->shared) + { + s = bfd_get_section_by_name (dynobj, ".interp"); + BFD_ASSERT (s != NULL); + s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; + s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; + } + } + + /* Set up .got offsets for local syms, and space for local dynamic + relocs. */ + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + bfd_signed_vma *local_got; + bfd_signed_vma *end_local_got; + bfd_size_type locsymcount; + Elf_Internal_Shdr *symtab_hdr; + asection *srel; + + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) + continue; + + for (s = ibfd->sections; s != NULL; s = s->next) + { + struct elf_m32r_dyn_relocs *p; + + for (p = ((struct elf_m32r_dyn_relocs *) + elf_section_data (s)->local_dynrel); + p != NULL; + p = p->next) + { + if (! bfd_is_abs_section (p->sec) + && bfd_is_abs_section (p->sec->output_section)) + { + /* Input section has been discarded, either because + it is a copy of a linkonce section or due to + linker script /DISCARD/, so we'll be discarding + the relocs too. */ + } + else if (p->count != 0) + { + srel = elf_section_data (p->sec)->sreloc; + srel->_raw_size += p->count * sizeof (Elf32_External_Rela); + if ((p->sec->output_section->flags & SEC_READONLY) != 0) + info->flags |= DF_TEXTREL; + } + } + } + + local_got = elf_local_got_refcounts (ibfd); + if (!local_got) + continue; + + symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; + locsymcount = symtab_hdr->sh_info; + end_local_got = local_got + locsymcount; + s = htab->sgot; + srel = htab->srelgot; + for (; local_got < end_local_got; ++local_got) + { + if (*local_got > 0) + { + *local_got = s->_raw_size; + s->_raw_size += 4; + if (info->shared) + srel->_raw_size += sizeof (Elf32_External_Rela); + } + else + *local_got = (bfd_vma) -1; + } + } + + /* Allocate global sym .plt and .got entries, and space for global + sym dynamic relocs. */ + elf_link_hash_traverse (&htab->root, allocate_dynrelocs, (PTR) info); + + /* We now have determined the sizes of the various dynamic sections. + Allocate memory for them. */ + relocs = FALSE; + for (s = dynobj->sections; s != NULL; s = s->next) + { + if ((s->flags & SEC_LINKER_CREATED) == 0) + continue; + + if (s == htab->splt + || s == htab->sgot + || s == htab->sgotplt) + { + /* Strip this section if we don't need it; see the + comment below. */ + } + else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) + { + if (s->_raw_size != 0 && s != htab->srelplt) + relocs = TRUE; + + /* We use the reloc_count field as a counter if we need + to copy relocs into the output file. */ + s->reloc_count = 0; + } + else + { + /* It's not one of our sections, so don't allocate space. */ + continue; + } + + if (s->_raw_size == 0) + { + /* If we don't need this section, strip it from the + output file. This is mostly to handle .rela.bss and + .rela.plt. We must create both sections in + create_dynamic_sections, because they must be created + before the linker maps input sections to output + sections. The linker does that before + adjust_dynamic_symbol is called, and it is that + function which decides whether anything needs to go + into these sections. */ + _bfd_strip_section_from_output (info, s); + continue; + } + + /* Allocate memory for the section contents. We use bfd_zalloc + here in case unused entries are not reclaimed before the + section's contents are written out. This should not happen, + but this way if it does, we get a R_M32R_NONE reloc instead + of garbage. */ + s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); + if (s->contents == NULL) + return FALSE; + } + + if (htab->root.dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in m32r_elf_finish_dynamic_sections, but we + must add the entries now so that we get the correct size for + the .dynamic section. The DT_DEBUG entry is filled in by the + dynamic linker and used by the debugger. */ +#define add_dynamic_entry(TAG, VAL) \ + bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) + + if (! info->shared) + { + if (! add_dynamic_entry (DT_DEBUG, 0)) + return FALSE; + } + + if (htab->splt->_raw_size != 0) + { + if (! add_dynamic_entry (DT_PLTGOT, 0) + || ! add_dynamic_entry (DT_PLTRELSZ, 0) + || ! add_dynamic_entry (DT_PLTREL, DT_RELA) + || ! add_dynamic_entry (DT_JMPREL, 0)) + return FALSE; + } + + if (relocs) + { + if (! add_dynamic_entry (DT_RELA, 0) + || ! add_dynamic_entry (DT_RELASZ, 0) + || ! add_dynamic_entry (DT_RELAENT, + sizeof (Elf32_External_Rela))) + return FALSE; + + /* If any dynamic relocs apply to a read-only section, + then we need a DT_TEXTREL entry. */ + if ((info->flags & DF_TEXTREL) == 0) + elf_link_hash_traverse (&htab->root, readonly_dynrelocs, + (PTR) info); + + if ((info->flags & DF_TEXTREL) != 0) + { + if (! add_dynamic_entry (DT_TEXTREL, 0)) + return FALSE; + } + } + } +#undef add_dynamic_entry + + return TRUE; +} /* Relocate an M32R/D ELF section. There is some attempt to make this function usable for many architectures, both for RELA and REL type relocs, if only to serve as a learning tool. @@ -986,10 +2534,17 @@ m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section, /* Assume success. */ bfd_boolean ret = TRUE; -#if !USE_REL - if (info->relocatable) - return TRUE; -#endif + struct elf_m32r_link_hash_table *htab = m32r_elf_hash_table (info); + bfd *dynobj; + bfd_vma *local_got_offsets; + asection *sgot, *splt, *sreloc; + + dynobj = htab->root.dynobj; + local_got_offsets = elf_local_got_offsets (input_bfd); + + sgot = htab->sgot; + splt = htab->splt; + sreloc = NULL; rel = relocs; relend = relocs + input_section->reloc_count; @@ -998,18 +2553,19 @@ m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section, int r_type; reloc_howto_type *howto; unsigned long r_symndx; + struct elf_link_hash_entry *h; /* We can't modify r_addend here as elf_link_input_bfd has an assert to - ensure it's zero (we use REL relocs, not RELA). Therefore this - should be assigning zero to `addend', but for clarity we use - `r_addend'. */ + ensure it's zero (we use REL relocs, not RELA). Therefore this + should be assigning zero to `addend', but for clarity we use + `r_addend'. */ bfd_vma addend = rel->r_addend; bfd_vma offset = rel->r_offset; - struct elf_link_hash_entry *h; Elf_Internal_Sym *sym; asection *sec; const char *sym_name; bfd_reloc_status_type r; const char *errmsg = NULL; + bfd_boolean use_rel = FALSE; h = NULL; r_type = ELF32_R_TYPE (rel->r_info); @@ -1024,14 +2580,19 @@ m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section, } if (r_type == R_M32R_GNU_VTENTRY - || r_type == R_M32R_GNU_VTINHERIT) + || r_type == R_M32R_GNU_VTINHERIT + || r_type == R_M32R_NONE + || r_type == R_M32R_RELA_GNU_VTENTRY + || r_type == R_M32R_RELA_GNU_VTINHERIT) continue; + if (r_type <= R_M32R_GNU_VTENTRY) + use_rel = TRUE; + howto = m32r_elf_howto_table + r_type; r_symndx = ELF32_R_SYM (rel->r_info); -#if USE_REL - if (info->relocatable) + if (info->relocatable && (use_rel == TRUE)) { /* This is a relocatable link. We don't have to change anything, unless the reloc is against a section symbol, @@ -1092,13 +2653,13 @@ m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section, } } else -#endif /* USE_REL */ { bfd_vma relocation; /* This is a final link. */ sym = NULL; sec = NULL; + h = NULL; if (r_symndx < symtab_hdr->sh_info) { @@ -1106,20 +2667,37 @@ m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section, sym = local_syms + r_symndx; sec = local_sections[r_symndx]; sym_name = "<local symbol>"; -#if !USE_REL - relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); - addend = rel->r_addend; -#else - /* FIXME: This won't handle local relocations against SEC_MERGE - symbols. See elf32-i386.c for how to do this. */ - relocation = (sec->output_section->vma - + sec->output_offset - + sym->st_value); -#endif + + if (use_rel == FALSE) + { + relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); + addend = rel->r_addend; + + if (info->relocatable) + { + /* This is a relocatable link. We don't have to change + anything, unless the reloc is against a section symbol, + in which case we have to adjust according to where the + section symbol winds up in the output section. */ + if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) + rel->r_addend += sec->output_offset + sym->st_value; + + continue; + } + } + else + { + relocation = (sec->output_section->vma + + sec->output_offset + + sym->st_value); + } } else { /* External symbol. */ + if (info->relocatable && (use_rel == FALSE)) + continue; + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; while (h->root.type == bfd_link_hash_indirect || h->root.type == bfd_link_hash_warning) @@ -1129,9 +2707,64 @@ m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section, if (h->root.type == bfd_link_hash_defined || h->root.type == bfd_link_hash_defweak) { + bfd_boolean dyn; sec = h->root.u.def.section; - if (sec->output_section == NULL) - relocation = 0; + + dyn = htab->root.dynamic_sections_created; + sec = h->root.u.def.section; + if (r_type == R_M32R_GOTPC24 + || (r_type == R_M32R_GOTPC_HI_ULO + || r_type == R_M32R_GOTPC_HI_SLO + || r_type == R_M32R_GOTPC_LO) + || (r_type == R_M32R_26_PLTREL + && h->plt.offset != (bfd_vma) -1) + || ((r_type == R_M32R_GOT24 + || r_type == R_M32R_GOT16_HI_ULO + || r_type == R_M32R_GOT16_HI_SLO + || r_type == R_M32R_GOT16_LO) + && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) + && (! info->shared + || (! info->symbolic && h->dynindx != -1) + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0)) + || (info->shared + && ((! info->symbolic && h->dynindx != -1) + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0) + && (((r_type == R_M32R_16_RELA + || r_type == R_M32R_32_RELA + || r_type == R_M32R_24_RELA + || r_type == R_M32R_HI16_ULO_RELA + || r_type == R_M32R_HI16_SLO_RELA + || r_type == R_M32R_LO16_RELA) + && (h->elf_link_hash_flags + & ELF_LINK_FORCED_LOCAL) == 0) + || r_type == R_M32R_10_PCREL_RELA + || r_type == R_M32R_18_PCREL_RELA + || r_type == R_M32R_26_PCREL_RELA) + && ((input_section->flags & SEC_ALLOC) != 0 + /* DWARF will emit R_M32R_16(24,32) relocations + in its sections against symbols defined + externally in shared libraries. We can't do + anything with them here. */ + || ((input_section->flags & SEC_DEBUGGING) != 0 + && (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_DYNAMIC) != 0)))) + { + /* In these cases, we don't need the relocation + value. We check specially because in some + obscure cases sec->output_section will be NULL. */ + relocation = 0; + } + else if (sec->output_section == NULL) + { + (*_bfd_error_handler) + (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"), + bfd_get_filename (input_bfd), h->root.root.string, + bfd_get_section_name (input_bfd, input_section)); + + relocation = 0; + } else relocation = (h->root.u.def.value + sec->output_section->vma @@ -1139,11 +2772,17 @@ m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section, } else if (h->root.type == bfd_link_hash_undefweak) relocation = 0; + else if (info->shared + && (!info->symbolic) + && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) + relocation = 0; else { if (! ((*info->callbacks->undefined_symbol) (info, h->root.root.string, input_bfd, - input_section, offset, TRUE))) + input_section, offset, + (!info->shared + || ELF_ST_VISIBILITY (h->other))))) return FALSE; relocation = 0; } @@ -1158,11 +2797,283 @@ m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section, switch ((int) r_type) { + case R_M32R_GOTPC24: + /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation + ld24 rx,#_GLOBAL_OFFSET_TABLE_ + */ + relocation = sgot->output_section->vma; + break; + + case R_M32R_GOTPC_HI_ULO: + case R_M32R_GOTPC_HI_SLO: + case R_M32R_GOTPC_LO: + { + /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation + bl .+4 + seth rx,#high(_GLOBAL_OFFSET_TABLE_) + or3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) + or + bl .+4 + seth rx,#shigh(_GLOBAL_OFFSET_TABLE_) + add3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) + */ + relocation = sgot->output_section->vma; + relocation -= (input_section->output_section->vma + + input_section->output_offset + + rel->r_offset); + if ((r_type == R_M32R_GOTPC_HI_SLO) + && ((relocation + rel->r_addend) & 0x8000)) + rel->r_addend += 0x10000; + + break; + } + case R_M32R_GOT16_HI_ULO: + case R_M32R_GOT16_HI_SLO: + case R_M32R_GOT16_LO: + /* Fall through. */ + case R_M32R_GOT24: + /* Relocation is to the entry for this symbol in the global + offset table. */ + BFD_ASSERT (sgot != NULL); + + if (h != NULL) + { + bfd_boolean dyn; + bfd_vma off; + + off = h->got.offset; + BFD_ASSERT (off != (bfd_vma) -1); + + dyn = htab->root.dynamic_sections_created; + if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) + || (info->shared + && (info->symbolic + || h->dynindx == -1 + || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) + { + /* This is actually a static link, or it is a + -Bsymbolic link and the symbol is defined + locally, or the symbol was forced to be local + because of a version file. We must initialize + this entry in the global offset table. Since the + offset must always be a multiple of 4, we use the + least significant bit to record whether we have + initialized it already. + + When doing a dynamic link, we create a .rela.got + relocation entry to initialize the value. This + is done in the finish_dynamic_symbol routine. */ + if ((off & 1) != 0) + off &= ~1; + else + { + bfd_put_32 (output_bfd, relocation, + sgot->contents + off); + h->got.offset |= 1; + } + } + + relocation = sgot->output_offset + off; + } + else + { + bfd_vma off; + bfd_byte *loc; + + BFD_ASSERT (local_got_offsets != NULL + && local_got_offsets[r_symndx] != (bfd_vma) -1); + + off = local_got_offsets[r_symndx]; + + /* The offset must always be a multiple of 4. We use + the least significant bit to record whether we have + already processed this entry. */ + if ((off & 1) != 0) + off &= ~1; + else + { + bfd_put_32 (output_bfd, relocation, sgot->contents + off); + + if (info->shared) + { + asection *srelgot; + Elf_Internal_Rela outrel; + + /* We need to generate a R_M32R_RELATIVE reloc + for the dynamic linker. */ + srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (srelgot != NULL); + + outrel.r_offset = (sgot->output_section->vma + + sgot->output_offset + + off); + outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); + outrel.r_addend = relocation; + loc = srelgot->contents; + loc += srelgot->reloc_count * sizeof(Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); + ++srelgot->reloc_count; + } + + local_got_offsets[r_symndx] |= 1; + } + + relocation = sgot->output_offset + off; + } + if ((r_type == R_M32R_GOT16_HI_SLO) + && ((relocation + rel->r_addend) & 0x8000)) + rel->r_addend += 0x10000; + + break; + + case R_M32R_26_PLTREL: + /* Relocation is to the entry for this symbol in the + procedure linkage table. */ + + /* The native assembler will generate a 26_PLTREL reloc + for a local symbol if you assemble a call from one + section to another when using -K pic. */ + if (h == NULL) + break; + + //if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL + // || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) + // break; + if (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) + break; + + if (h->plt.offset == (bfd_vma) -1) + { + /* We didn't make a PLT entry for this symbol. This + happens when statically linking PIC code, or when + using -Bsymbolic. */ + break; + } + + relocation = (splt->output_section->vma + + splt->output_offset + + h->plt.offset); + break; + + case R_M32R_HI16_SLO_RELA: + { + if ((relocation + rel->r_addend) & 0x8000) + { + rel->r_addend += 0x10000; + } + } + /* Fall through. */ + case R_M32R_16_RELA: + case R_M32R_24_RELA: + case R_M32R_32_RELA: + case R_M32R_18_PCREL_RELA: + case R_M32R_26_PCREL_RELA: + case R_M32R_HI16_ULO_RELA: + case R_M32R_LO16_RELA: + case R_M32R_SDA16_RELA: + if (info->shared + && r_symndx != 0 + && (input_section->flags & SEC_ALLOC) != 0 + && ((r_type != R_M32R_18_PCREL_RELA + && r_type != R_M32R_26_PCREL_RELA) + || (h != NULL + && h->dynindx != -1 + && (! info->symbolic + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0)))) + { + Elf_Internal_Rela outrel; + bfd_boolean skip, relocate; + bfd_byte *loc; + + /* When generating a shared object, these relocations + are copied into the output file to be resolved at run + time. */ + + if (sreloc == NULL) + { + const char *name; + + name = (bfd_elf_string_from_elf_section + (input_bfd, + elf_elfheader (input_bfd)->e_shstrndx, + elf_section_data (input_section)->rel_hdr.sh_name)); + if (name == NULL) + return FALSE; + + BFD_ASSERT (strncmp (name, ".rela", 5) == 0 + && strcmp (bfd_get_section_name (input_bfd, + input_section), + name + 5) == 0); + + sreloc = bfd_get_section_by_name (dynobj, name); + BFD_ASSERT (sreloc != NULL); + } + + skip = FALSE; + relocate = FALSE; + + outrel.r_offset = _bfd_elf_section_offset (output_bfd, + info, + input_section, + rel->r_offset); + if (outrel.r_offset == (bfd_vma) -1) + skip = TRUE; + else if (outrel.r_offset == (bfd_vma) -2) + skip = TRUE, relocate = TRUE; + outrel.r_offset += (input_section->output_section->vma + + input_section->output_offset); + + if (skip) + memset (&outrel, 0, sizeof outrel); + else if (r_type == R_M32R_18_PCREL_RELA + || r_type == R_M32R_26_PCREL_RELA) + { + BFD_ASSERT (h != NULL && h->dynindx != -1); + outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); + outrel.r_addend = rel->r_addend; + } + else + { + /* h->dynindx may be -1 if this symbol was marked to + become local. */ + if (h == NULL + || ((info->symbolic || h->dynindx == -1) + && (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) != 0)) + { + relocate = TRUE; + outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); + outrel.r_addend = relocation + rel->r_addend; + } + else + { + BFD_ASSERT (h->dynindx != -1); + outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); + outrel.r_addend = relocation + rel->r_addend; + } + } + + loc = sreloc->contents; + loc += sreloc->reloc_count * sizeof(Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); + ++sreloc->reloc_count; + + /* If this reloc is against an external symbol, we do + not want to fiddle with the addend. Otherwise, we + need to include the symbol value so that it becomes + an addend for the dynamic reloc. */ + if (! relocate) + continue; + } + break; + case (int) R_M32R_10_PCREL : r = m32r_elf_do_10_pcrel_reloc (input_bfd, howto, input_section, contents, offset, sec, relocation, addend); - break; + goto check_reloc; case (int) R_M32R_HI16_SLO : case (int) R_M32R_HI16_ULO : @@ -1190,7 +3101,8 @@ m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section, contents, offset, relocation, addend); } - break; + + goto check_reloc; case (int) R_M32R_SDA16 : { @@ -1233,14 +3145,20 @@ m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section, continue; } } - /* fall through */ + /* fall through */ + + default : /* OLD_M32R_RELOC */ - default : r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, offset, relocation, addend); - break; + goto check_reloc; } + + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, + relocation, rel->r_addend); + } check_reloc: @@ -1307,6 +3225,353 @@ m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section, return ret; } + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ +static bfd_boolean +m32r_elf_finish_dynamic_symbol (output_bfd, info, h, sym) + bfd *output_bfd; + struct bfd_link_info *info; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; +{ + struct elf_m32r_link_hash_table *htab; + bfd *dynobj; + bfd_byte *loc; + +#ifdef DEBUG_PIC +printf("m32r_elf_finish_dynamic_symbol()\n"); +#endif + + htab = m32r_elf_hash_table (info); + dynobj = htab->root.dynobj; + + if (h->plt.offset != (bfd_vma) -1) + { + asection *splt; + asection *sgot; + asection *srela; + + bfd_vma plt_index; + bfd_vma got_offset; + Elf_Internal_Rela rela; + + /* This symbol has an entry in the procedure linkage table. Set + it up. */ + + BFD_ASSERT (h->dynindx != -1); + + splt = htab->splt; + sgot = htab->sgotplt; + srela = htab->srelplt; + BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); + + /* Get the index in the procedure linkage table which + corresponds to this symbol. This is the index of this symbol + in all the symbols for which we are making plt entries. The + first entry in the procedure linkage table is reserved. */ + plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; + + /* Get the offset into the .got table of the entry that + corresponds to this function. Each .got entry is 4 bytes. + The first three are reserved. */ + got_offset = (plt_index + 3) * 4; + + /* Fill in the entry in the procedure linkage table. */ + if (! info->shared) + { + bfd_put_32 (output_bfd, + (PLT_ENTRY_WORD0b + + (((sgot->output_section->vma + + sgot->output_offset + + got_offset) >> 16) & 0xffff)), + splt->contents + h->plt.offset); + bfd_put_32 (output_bfd, + (PLT_ENTRY_WORD1b + + ((sgot->output_section->vma + + sgot->output_offset + + got_offset) & 0xffff)), + splt->contents + h->plt.offset + 4); + bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, + splt->contents + h->plt.offset + 8); + bfd_put_32 (output_bfd, + (PLT_ENTRY_WORD3 + + plt_index * sizeof (Elf32_External_Rela)), + splt->contents + h->plt.offset + 12); + bfd_put_32 (output_bfd, + (PLT_ENTRY_WORD4 + + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), + splt->contents + h->plt.offset + 16); + } + else + { + bfd_put_32 (output_bfd, + PLT_ENTRY_WORD0 + got_offset, + splt->contents + h->plt.offset); + bfd_put_32 (output_bfd, PLT_ENTRY_WORD1, + splt->contents + h->plt.offset + 4); + bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, + splt->contents + h->plt.offset + 8); + bfd_put_32 (output_bfd, + (PLT_ENTRY_WORD3 + + plt_index * sizeof (Elf32_External_Rela)), + splt->contents + h->plt.offset + 12); + bfd_put_32 (output_bfd, + (PLT_ENTRY_WORD4 + + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), + splt->contents + h->plt.offset + 16); + } + + /* Fill in the entry in the global offset table. */ + bfd_put_32 (output_bfd, + (splt->output_section->vma + + splt->output_offset + + h->plt.offset + + 12), /* same offset */ + sgot->contents + got_offset); + + /* Fill in the entry in the .rela.plt section. */ + rela.r_offset = (sgot->output_section->vma + + sgot->output_offset + + got_offset); + rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_JMP_SLOT); + rela.r_addend = 0; + loc = srela->contents; + loc += plt_index * sizeof(Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); + + if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) + { + /* Mark the symbol as undefined, rather than as defined in + the .plt section. Leave the value alone. */ + sym->st_shndx = SHN_UNDEF; + } + } + + if (h->got.offset != (bfd_vma) -1) + { + asection *sgot; + asection *srela; + Elf_Internal_Rela rela; + + /* This symbol has an entry in the global offset table. Set it + up. */ + + sgot = htab->sgot; + srela = htab->srelgot; + BFD_ASSERT (sgot != NULL && srela != NULL); + + rela.r_offset = (sgot->output_section->vma + + sgot->output_offset + + (h->got.offset &~ 1)); + + /* If this is a -Bsymbolic link, and the symbol is defined + locally, we just want to emit a RELATIVE reloc. Likewise if + the symbol was forced to be local because of a version file. + The entry in the global offset table will already have been + initialized in the relocate_section function. */ + if (info->shared + && (info->symbolic + || h->dynindx == -1 + || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) + { + rela.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); + rela.r_addend = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + } + else + { + BFD_ASSERT((h->got.offset & 1) == 0); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); + rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_GLOB_DAT); + rela.r_addend = 0; + } + + loc = srela->contents; + loc += srela->reloc_count * sizeof(Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); + ++srela->reloc_count; + } + + if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) + { + asection *s; + Elf_Internal_Rela rela; + + /* This symbols needs a copy reloc. Set it up. */ + + BFD_ASSERT (h->dynindx != -1 + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)); + + s = bfd_get_section_by_name (h->root.u.def.section->owner, + ".rela.bss"); + BFD_ASSERT (s != NULL); + + rela.r_offset = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_COPY); + rela.r_addend = 0; + loc = s->contents; + loc += s->reloc_count * sizeof(Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); + ++s->reloc_count; + } + + /* Mark some specially defined symbols as absolute. */ + if (strcmp (h->root.root.string, "_DYNAMIC") == 0 + || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + sym->st_shndx = SHN_ABS; + + return TRUE; +} + + +/* Finish up the dynamic sections. */ + +static bfd_boolean +m32r_elf_finish_dynamic_sections (output_bfd, info) + bfd *output_bfd; + struct bfd_link_info *info; +{ + struct elf_m32r_link_hash_table *htab; + bfd *dynobj; + asection *sdyn; + asection *sgot; + +#ifdef DEBUG_PIC +printf("m32r_elf_finish_dynamic_sections()\n"); +#endif + + htab = m32r_elf_hash_table (info); + dynobj = htab->root.dynobj; + + sgot = htab->sgotplt; + sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); + + if (htab->root.dynamic_sections_created) + { + asection *splt; + Elf32_External_Dyn *dyncon, *dynconend; + + BFD_ASSERT (sgot != NULL && sdyn != NULL); + + dyncon = (Elf32_External_Dyn *) sdyn->contents; + dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); + + for (; dyncon < dynconend; dyncon++) + { + Elf_Internal_Dyn dyn; + const char *name; + asection *s; + + bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); + + switch (dyn.d_tag) + { + default: + break; + + case DT_PLTGOT: + name = ".got"; + s = htab->sgot->output_section; + goto get_vma; + case DT_JMPREL: + name = ".rela.plt"; + s = htab->srelplt->output_section; + get_vma: + BFD_ASSERT (s != NULL); + dyn.d_un.d_ptr = s->vma; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_PLTRELSZ: + s = htab->srelplt->output_section; + BFD_ASSERT (s != NULL); + if (s->_cooked_size != 0) + dyn.d_un.d_val = s->_cooked_size; + else + dyn.d_un.d_val = s->_raw_size; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_RELASZ: + /* My reading of the SVR4 ABI indicates that the + procedure linkage table relocs (DT_JMPREL) should be + included in the overall relocs (DT_RELA). This is + what Solaris does. However, UnixWare can not handle + that case. Therefore, we override the DT_RELASZ entry + here to make it not include the JMPREL relocs. Since + the linker script arranges for .rela.plt to follow all + other relocation sections, we don't have to worry + about changing the DT_RELA entry. */ + if (htab->srelplt != NULL) + { + s = htab->srelplt->output_section; + if (s->_cooked_size != 0) + dyn.d_un.d_val -= s->_cooked_size; + else + dyn.d_un.d_val -= s->_raw_size; + } + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + } + } + + /* Fill in the first entry in the procedure linkage table. */ + splt = htab->splt; + if (splt && splt->_raw_size > 0) + { + if (info->shared) + { + bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); + bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); + bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); + bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); + bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); + } + else + { + unsigned long addr; + /* addr = .got + 4 */ + addr = sgot->output_section->vma + sgot->output_offset + 4; + bfd_put_32 (output_bfd, + PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), + splt->contents); + bfd_put_32 (output_bfd, + PLT0_ENTRY_WORD1 | (addr & 0xffff), + splt->contents + 4); + bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); + bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); + bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); + } + + elf_section_data (splt->output_section)->this_hdr.sh_entsize = + PLT_ENTRY_SIZE; + } + } + + /* Fill in the first three entries in the global offset table. */ + if (sgot && sgot->_raw_size > 0) + { + if (sdyn == NULL) + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); + else + bfd_put_32 (output_bfd, + sdyn->output_section->vma + sdyn->output_offset, + sgot->contents); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); + + elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; + } + + return TRUE; +} + #if 0 /* relaxing not supported yet */ @@ -2005,6 +4270,8 @@ m32r_elf_gc_mark_hook (sec, info, rel, h, sym) { case R_M32R_GNU_VTINHERIT: case R_M32R_GNU_VTENTRY: + case R_M32R_RELA_GNU_VTINHERIT: + case R_M32R_RELA_GNU_VTENTRY: break; default: @@ -2035,7 +4302,97 @@ m32r_elf_gc_sweep_hook (abfd, info, sec, relocs) asection *sec ATTRIBUTE_UNUSED; const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; { - /* we don't use got and plt entries for m32r */ + /* Update the got entry reference counts for the section being removed. */ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + bfd_signed_vma *local_got_refcounts; + const Elf_Internal_Rela *rel, *relend; + unsigned long r_symndx; + struct elf_link_hash_entry *h; + + elf_section_data (sec)->local_dynrel = NULL; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + local_got_refcounts = elf_local_got_refcounts (abfd); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; rel++) + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_M32R_GOT16_HI_ULO: + case R_M32R_GOT16_HI_SLO: + case R_M32R_GOT16_LO: + case R_M32R_GOT24: + case R_M32R_GOTPC_HI_ULO: + case R_M32R_GOTPC_HI_SLO: + case R_M32R_GOTPC_LO: + case R_M32R_GOTPC24: + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + if (h->got.refcount > 0) + h->got.refcount--; + } + else + { + if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) + local_got_refcounts[r_symndx]--; + } + break; + + case R_M32R_16_RELA: + case R_M32R_24_RELA: + case R_M32R_32_RELA: + case R_M32R_HI16_ULO_RELA: + case R_M32R_HI16_SLO_RELA: + case R_M32R_LO16_RELA: + case R_M32R_SDA16_RELA: + case R_M32R_18_PCREL_RELA: + case R_M32R_26_PCREL_RELA: + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + struct elf_m32r_link_hash_entry *eh; + struct elf_m32r_dyn_relocs **pp; + struct elf_m32r_dyn_relocs *p; + + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + + if (!info->shared && h->plt.refcount > 0) + h->plt.refcount -= 1; + + eh = (struct elf_m32r_link_hash_entry *) h; + + for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) + if (p->sec == sec) + { + if (ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA + || ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA) + p->pc_count -= 1; + p->count -= 1; + if (p->count == 0) + *pp = p->next; + break; + } + } + break; + + case R_M32R_26_PLTREL: + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + if (h->plt.refcount > 0) + h->plt.refcount--; + } + break; + + default: + break; + } + return TRUE; } @@ -2054,32 +4411,250 @@ m32r_elf_check_relocs (abfd, info, sec, relocs) struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; const Elf_Internal_Rela *rel; const Elf_Internal_Rela *rel_end; + struct elf_m32r_link_hash_table *htab; + bfd *dynobj; + bfd_vma *local_got_offsets; + asection *sgot, *srelgot, *sreloc; if (info->relocatable) return TRUE; + sgot = srelgot = sreloc = NULL; + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; sym_hashes = elf_sym_hashes (abfd); sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); if (!elf_bad_symtab (abfd)) sym_hashes_end -= symtab_hdr->sh_info; + htab = m32r_elf_hash_table (info); + dynobj = htab->root.dynobj; + local_got_offsets = elf_local_got_offsets (abfd); + rel_end = relocs + sec->reloc_count; for (rel = relocs; rel < rel_end; rel++) { + int r_type; struct elf_link_hash_entry *h; unsigned long r_symndx; r_symndx = ELF32_R_SYM (rel->r_info); + r_type = ELF32_R_TYPE (rel->r_info); if (r_symndx < symtab_hdr->sh_info) h = NULL; else h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - switch (ELF32_R_TYPE (rel->r_info)) + /* Some relocs require a global offset table. */ + if (htab->sgot == NULL) + { + switch (r_type) + { + case R_M32R_GOT16_HI_ULO: + case R_M32R_GOT16_HI_SLO: + case R_M32R_GOT16_LO: + case R_M32R_GOTPC24: + case R_M32R_GOTPC_HI_ULO: + case R_M32R_GOTPC_HI_SLO: + case R_M32R_GOTPC_LO: + case R_M32R_GOT24: + if (dynobj == NULL) + htab->root.dynobj = dynobj = abfd; + if (! create_got_section (dynobj, info)) + return FALSE; + break; + + default: + break; + } + } + + switch (r_type) { + case R_M32R_GOT16_HI_ULO: + case R_M32R_GOT16_HI_SLO: + case R_M32R_GOT16_LO: + case R_M32R_GOT24: + + if (h != NULL) + h->got.refcount += 1; + else + { + bfd_signed_vma *local_got_refcounts; + + /* This is a global offset table entry for a local + symbol. */ + local_got_refcounts = elf_local_got_refcounts (abfd); + if (local_got_refcounts == NULL) + { + bfd_size_type size; + + size = symtab_hdr->sh_info; + size *= sizeof (bfd_signed_vma); + local_got_refcounts = ((bfd_signed_vma *) + bfd_zalloc (abfd, size)); + if (local_got_refcounts == NULL) + return FALSE; + elf_local_got_refcounts (abfd) = local_got_refcounts; + } + local_got_refcounts[r_symndx] += 1; + } + break; + + case R_M32R_26_PLTREL: + /* This symbol requires a procedure linkage table entry. We + actually build the entry in adjust_dynamic_symbol, + because this might be a case of linking PIC code without + linking in any dynamic objects, in which case we don't + need to generate a procedure linkage table after all. */ + + /* If this is a local symbol, we resolve it directly without + creating a procedure linkage table entry. */ + if (h == NULL) + continue; + + if (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) + break; + + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + h->plt.refcount += 1; + break; + + case R_M32R_16_RELA: + case R_M32R_24_RELA: + case R_M32R_32_RELA: + case R_M32R_HI16_ULO_RELA: + case R_M32R_HI16_SLO_RELA: + case R_M32R_LO16_RELA: + case R_M32R_SDA16_RELA: + case R_M32R_18_PCREL_RELA: + case R_M32R_26_PCREL_RELA: + + if (h != NULL && !info->shared) + { + h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; + h->plt.refcount += 1; + } + + /* If we are creating a shared library, and this is a reloc + against a global symbol, or a non PC relative reloc + against a local symbol, then we need to copy the reloc + into the shared library. However, if we are linking with + -Bsymbolic, we do not need to copy a reloc against a + global symbol which is defined in an object we are + including in the link (i.e., DEF_REGULAR is set). At + this point we have not seen all the input files, so it is + possible that DEF_REGULAR is not set now but will be set + later (it is never cleared). We account for that + possibility below by storing information in the + dyn_relocs field of the hash table entry. A similar + situation occurs when creating shared libraries and symbol + visibility changes render the symbol local. + + If on the other hand, we are creating an executable, we + may need to keep relocations for symbols satisfied by a + dynamic library if we manage to avoid copy relocs for the + symbol. */ + if ((info->shared + && (sec->flags & SEC_ALLOC) != 0 + && ((r_type != R_M32R_26_PCREL_RELA + && r_type != R_M32R_18_PCREL_RELA) + || (h != NULL + && (! info->symbolic + || h->root.type == bfd_link_hash_defweak + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0)))) + || (!info->shared + && (sec->flags & SEC_ALLOC) != 0 + && h != NULL + && (h->root.type == bfd_link_hash_defweak + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0))) + { + struct elf_m32r_dyn_relocs *p; + struct elf_m32r_dyn_relocs **head; + + if (dynobj == NULL) + htab->root.dynobj = dynobj = abfd; + + /* When creating a shared object, we must copy these + relocs into the output file. We create a reloc + section in dynobj and make room for the reloc. */ + if (sreloc == NULL) + { + const char *name; + + name = (bfd_elf_string_from_elf_section + (abfd, + elf_elfheader (abfd)->e_shstrndx, + elf_section_data (sec)->rel_hdr.sh_name)); + if (name == NULL) + return FALSE; + + BFD_ASSERT (strncmp (name, ".rela", 5) == 0 + && strcmp (bfd_get_section_name (abfd, sec), + name + 5) == 0); + + sreloc = bfd_get_section_by_name (dynobj, name); + if (sreloc == NULL) + { + flagword flags; + + sreloc = bfd_make_section (dynobj, name); + flags = (SEC_HAS_CONTENTS | SEC_READONLY + | SEC_IN_MEMORY | SEC_LINKER_CREATED); + if ((sec->flags & SEC_ALLOC) != 0) + flags |= SEC_ALLOC | SEC_LOAD; + if (sreloc == NULL + || ! bfd_set_section_flags (dynobj, sreloc, flags) + || ! bfd_set_section_alignment (dynobj, sreloc, 2)) + return FALSE; + } + elf_section_data (sec)->sreloc = sreloc; + } + + /* If this is a global symbol, we count the number of + relocations we need for this symbol. */ + if (h != NULL) + head = &((struct elf_m32r_link_hash_entry *) h)->dyn_relocs; + else + { + asection *s; + + /* Track dynamic relocs needed for local syms too. */ + s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, + sec, r_symndx); + if (s == NULL) + return FALSE; + + head = ((struct elf_m32r_dyn_relocs **) + &elf_section_data (s)->local_dynrel); + } + + p = *head; + if (p == NULL || p->sec != sec) + { + bfd_size_type amt = sizeof (*p); + p = ((struct elf_m32r_dyn_relocs *) bfd_alloc (dynobj, amt)); + if (p == NULL) + return FALSE; + p->next = *head; + *head = p; + p->sec = sec; + p->count = 0; + p->pc_count = 0; + } + + p->count += 1; + if (ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA + || ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA) + p->pc_count += 1; + } + break; + /* This relocation describes the C++ object vtable hierarchy. Reconstruct it for later use during GC. */ + case R_M32R_RELA_GNU_VTINHERIT: case R_M32R_GNU_VTINHERIT: if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) return FALSE; @@ -2091,6 +4666,10 @@ m32r_elf_check_relocs (abfd, info, sec, relocs) if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) return FALSE; break; + case R_M32R_RELA_GNU_VTENTRY: + if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return FALSE; + break; } } @@ -2103,6 +4682,61 @@ static struct bfd_elf_special_section const m32r_elf_special_sections[]= { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, { NULL, 0, 0, 0, 0 } }; + +static bfd_boolean +m32r_elf_fake_sections (abfd, hdr, sec) + bfd *abfd; + Elf_Internal_Shdr *hdr ATTRIBUTE_UNUSED; + asection *sec; +{ + register const char *name; + + name = bfd_get_section_name (abfd, sec); + + /* The generic elf_fake_sections will set up REL_HDR using the + default kind of relocations. But, we may actually need both + kinds of relocations, so we set up the second header here. + + This is not necessary for the O32 ABI since that only uses Elf32_Rel + relocations (cf. System V ABI, MIPS RISC Processor Supplement, + 3rd Edition, p. 4-17). It breaks the IRIX 5/6 32-bit ld, since one + of the resulting empty .rela.<section> sections starts with + sh_offset == object size, and ld doesn't allow that. While the check + is arguably bogus for empty or SHT_NOBITS sections, it can easily be + avoided by not emitting those useless sections in the first place. */ + if ((sec->flags & SEC_RELOC) != 0) + { + struct bfd_elf_section_data *esd; + bfd_size_type amt = sizeof (Elf_Internal_Shdr); + + esd = elf_section_data (sec); + BFD_ASSERT (esd->rel_hdr2 == NULL); + esd->rel_hdr2 = (Elf_Internal_Shdr *) bfd_zalloc (abfd, amt); + if (!esd->rel_hdr2) + return FALSE; + _bfd_elf_init_reloc_shdr (abfd, esd->rel_hdr2, sec, + !sec->use_rela_p); + } + + return TRUE; +} + +static enum elf_reloc_type_class +m32r_elf_reloc_type_class (rela) + const Elf_Internal_Rela *rela; +{ + switch ((int) ELF32_R_TYPE (rela->r_info)) + { + case R_M32R_RELATIVE: + return reloc_class_relative; + case R_M32R_JMP_SLOT: + return reloc_class_plt; + case R_M32R_COPY: + return reloc_class_copy; + default: + return reloc_class_normal; + } +} #define ELF_ARCH bfd_arch_m32r #define ELF_MACHINE_CODE EM_M32R @@ -2111,8 +4745,10 @@ static struct bfd_elf_special_section const m32r_elf_special_sections[]= #define TARGET_BIG_SYM bfd_elf32_m32r_vec #define TARGET_BIG_NAME "elf32-m32r" +#define TARGET_LITTLE_SYM bfd_elf32_m32rle_vec +#define TARGET_LITTLE_NAME "elf32-m32rle" -#define elf_info_to_howto 0 +#define elf_info_to_howto m32r_info_to_howto #define elf_info_to_howto_rel m32r_info_to_howto_rel #define elf_backend_section_from_bfd_section _bfd_m32r_elf_section_from_bfd_section #define elf_backend_symbol_processing _bfd_m32r_elf_symbol_processing @@ -2122,10 +4758,35 @@ static struct bfd_elf_special_section const m32r_elf_special_sections[]= #define elf_backend_gc_sweep_hook m32r_elf_gc_sweep_hook #define elf_backend_check_relocs m32r_elf_check_relocs +#define elf_backend_create_dynamic_sections m32r_elf_create_dynamic_sections +#define bfd_elf32_bfd_link_hash_table_create m32r_elf_link_hash_table_create +#define elf_backend_size_dynamic_sections m32r_elf_size_dynamic_sections +#define elf_backend_finish_dynamic_sections m32r_elf_finish_dynamic_sections +#define elf_backend_adjust_dynamic_symbol m32r_elf_adjust_dynamic_symbol +#define elf_backend_finish_dynamic_symbol m32r_elf_finish_dynamic_symbol +#define elf_backend_reloc_type_class m32r_elf_reloc_type_class +#define elf_backend_copy_indirect_symbol m32r_elf_copy_indirect_symbol + #define elf_backend_can_gc_sections 1 -#if !USE_REL +/*#if !USE_REL #define elf_backend_rela_normal 1 +#endif*/ +#define elf_backend_can_refcount 1 +#define elf_backend_want_got_plt 1 +#define elf_backend_plt_readonly 1 +#define elf_backend_want_plt_sym 0 +#define elf_backend_got_header_size 12 + +#define elf_backend_may_use_rel_p 1 +#ifdef USE_M32R_OLD_RELOC +#define elf_backend_default_use_rela_p 0 +#define elf_backend_may_use_rela_p 0 +#else +#define elf_backend_default_use_rela_p 1 +#define elf_backend_may_use_rela_p 1 +#define elf_backend_fake_sections m32r_elf_fake_sections #endif + #if 0 /* not yet */ /* relax support */ #define bfd_elf32_bfd_relax_section m32r_elf_relax_section @@ -2141,3 +4802,20 @@ static struct bfd_elf_special_section const m32r_elf_special_sections[]= #define elf_backend_special_sections m32r_elf_special_sections #include "elf32-target.h" + +#undef ELF_MAXPAGESIZE +#define ELF_MAXPAGESIZE 0x1000 + +#undef TARGET_BIG_SYM +#define TARGET_BIG_SYM bfd_elf32_m32rlin_vec +#undef TARGET_BIG_NAME +#define TARGET_BIG_NAME "elf32-m32r-linux" +#undef TARGET_LITTLE_SYM +#define TARGET_LITTLE_SYM bfd_elf32_m32rlelin_vec +#undef TARGET_LITTLE_NAME +#define TARGET_LITTLE_NAME "elf32-m32rle-linux" +#undef elf32_bed +#define elf32_bed elf32_m32r_lin_bed + +#include "elf32-target.h" + |