diff options
Diffstat (limited to 'bfd/elf64-s390.c')
| -rw-r--r-- | bfd/elf64-s390.c | 1270 |
1 files changed, 1117 insertions, 153 deletions
diff --git a/bfd/elf64-s390.c b/bfd/elf64-s390.c index db5237f2e7f..1c81edf75bd 100644 --- a/bfd/elf64-s390.c +++ b/bfd/elf64-s390.c @@ -51,6 +51,9 @@ static asection *elf_s390_gc_mark_hook static bfd_boolean elf_s390_gc_sweep_hook PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); +struct elf_s390_link_hash_entry; +static void elf_s390_adjust_gotplt + PARAMS ((struct elf_s390_link_hash_entry *)); static bfd_boolean elf_s390_adjust_dynamic_symbol PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); static bfd_boolean allocate_dynrelocs @@ -69,7 +72,20 @@ static enum elf_reloc_type_class elf_s390_reloc_type_class PARAMS ((const Elf_Internal_Rela *)); static bfd_boolean elf_s390_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); -static bfd_boolean elf_s390_object_p PARAMS ((bfd *)); +static bfd_boolean elf_s390_mkobject + PARAMS ((bfd *)); +static bfd_boolean elf_s390_object_p + PARAMS ((bfd *)); +static int elf_s390_tls_transition + PARAMS ((struct bfd_link_info *, int, int)); +static bfd_reloc_status_type s390_tls_reloc + PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); +static bfd_vma dtpoff_base + PARAMS ((struct bfd_link_info *)); +static bfd_vma tpoff + PARAMS ((struct bfd_link_info *, bfd_vma)); +static void invalid_tls_insn + PARAMS ((bfd *, asection *, Elf_Internal_Rela *)); #include "elf/s390.h" @@ -94,32 +110,112 @@ static reloc_howto_type elf_howto_table[] = 0, /* dst_mask */ FALSE), /* pcrel_offset */ - HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), - HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), - HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), - HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), - HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), - HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), - HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GLOB_DAT",FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_JMP_SLOT",FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_RELATIVE",FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_GOTOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTOFF", FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), - HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), - HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), - HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), - HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), - HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), - HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), - HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), - HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), - HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), + HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), + HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, + bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), + HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), + HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), + HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), + HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, + bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), + HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), + HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), + HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), + HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), + HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), + HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), + HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), + HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), + HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), + HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), + HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), + HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), + HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), + HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), + HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, + bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), + HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), + HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), + HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE), + HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), + HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), + HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE), + HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, + s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), + HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, + s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), + HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, + s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), + EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ + HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE), + HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, + bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), + EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */ + HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE), + EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */ + HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE), + EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ + HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE), + HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE), + EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ + HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE), + EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ + HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE), + HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE), + HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE), + HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, + bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE), }; /* GNU extension to record C++ vtable hierarchy. */ @@ -164,7 +260,7 @@ elf_s390_reloc_type_lookup (abfd, code) case BFD_RELOC_390_RELATIVE: return &elf_howto_table[(int) R_390_RELATIVE]; case BFD_RELOC_32_GOTOFF: - return &elf_howto_table[(int) R_390_GOTOFF]; + return &elf_howto_table[(int) R_390_GOTOFF32]; case BFD_RELOC_390_GOTPC: return &elf_howto_table[(int) R_390_GOTPC]; case BFD_RELOC_390_GOT16: @@ -175,10 +271,6 @@ elf_s390_reloc_type_lookup (abfd, code) return &elf_howto_table[(int) R_390_PC16DBL]; case BFD_RELOC_390_PLT16DBL: return &elf_howto_table[(int) R_390_PLT16DBL]; - case BFD_RELOC_VTABLE_INHERIT: - return &elf64_s390_vtinherit_howto; - case BFD_RELOC_VTABLE_ENTRY: - return &elf64_s390_vtentry_howto; case BFD_RELOC_390_PC32DBL: return &elf_howto_table[(int) R_390_PC32DBL]; case BFD_RELOC_390_PLT32DBL: @@ -195,6 +287,58 @@ elf_s390_reloc_type_lookup (abfd, code) return &elf_howto_table[(int) R_390_PLT64]; case BFD_RELOC_390_GOTENT: return &elf_howto_table[(int) R_390_GOTENT]; + case BFD_RELOC_16_GOTOFF: + return &elf_howto_table[(int) R_390_GOTOFF16]; + case BFD_RELOC_390_GOTOFF64: + return &elf_howto_table[(int) R_390_GOTOFF64]; + case BFD_RELOC_390_GOTPLT12: + return &elf_howto_table[(int) R_390_GOTPLT12]; + case BFD_RELOC_390_GOTPLT16: + return &elf_howto_table[(int) R_390_GOTPLT16]; + case BFD_RELOC_390_GOTPLT32: + return &elf_howto_table[(int) R_390_GOTPLT32]; + case BFD_RELOC_390_GOTPLT64: + return &elf_howto_table[(int) R_390_GOTPLT64]; + case BFD_RELOC_390_GOTPLTENT: + return &elf_howto_table[(int) R_390_GOTPLTENT]; + case BFD_RELOC_390_PLTOFF16: + return &elf_howto_table[(int) R_390_PLTOFF16]; + case BFD_RELOC_390_PLTOFF32: + return &elf_howto_table[(int) R_390_PLTOFF32]; + case BFD_RELOC_390_PLTOFF64: + return &elf_howto_table[(int) R_390_PLTOFF64]; + case BFD_RELOC_390_TLS_LOAD: + return &elf_howto_table[(int) R_390_TLS_LOAD]; + case BFD_RELOC_390_TLS_GDCALL: + return &elf_howto_table[(int) R_390_TLS_GDCALL]; + case BFD_RELOC_390_TLS_LDCALL: + return &elf_howto_table[(int) R_390_TLS_LDCALL]; + case BFD_RELOC_390_TLS_GD64: + return &elf_howto_table[(int) R_390_TLS_GD64]; + case BFD_RELOC_390_TLS_GOTIE12: + return &elf_howto_table[(int) R_390_TLS_GOTIE12]; + case BFD_RELOC_390_TLS_GOTIE64: + return &elf_howto_table[(int) R_390_TLS_GOTIE64]; + case BFD_RELOC_390_TLS_LDM64: + return &elf_howto_table[(int) R_390_TLS_LDM64]; + case BFD_RELOC_390_TLS_IE64: + return &elf_howto_table[(int) R_390_TLS_IE64]; + case BFD_RELOC_390_TLS_IEENT: + return &elf_howto_table[(int) R_390_TLS_IEENT]; + case BFD_RELOC_390_TLS_LE64: + return &elf_howto_table[(int) R_390_TLS_LE64]; + case BFD_RELOC_390_TLS_LDO64: + return &elf_howto_table[(int) R_390_TLS_LDO64]; + case BFD_RELOC_390_TLS_DTPMOD: + return &elf_howto_table[(int) R_390_TLS_DTPMOD]; + case BFD_RELOC_390_TLS_DTPOFF: + return &elf_howto_table[(int) R_390_TLS_DTPOFF]; + case BFD_RELOC_390_TLS_TPOFF: + return &elf_howto_table[(int) R_390_TLS_TPOFF]; + case BFD_RELOC_VTABLE_INHERIT: + return &elf64_s390_vtinherit_howto; + case BFD_RELOC_VTABLE_ENTRY: + return &elf64_s390_vtentry_howto; default: break; } @@ -226,6 +370,23 @@ elf_s390_info_to_howto (abfd, cache_ptr, dst) } } +/* A relocation function which doesn't do anything. */ +static bfd_reloc_status_type +s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, + output_bfd, error_message) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *reloc_entry; + asymbol *symbol ATTRIBUTE_UNUSED; + PTR data ATTRIBUTE_UNUSED; + asection *input_section; + bfd *output_bfd; + char **error_message ATTRIBUTE_UNUSED; +{ + if (output_bfd) + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; +} + static bfd_boolean elf_s390_is_local_label_name (abfd, name) bfd *abfd; @@ -357,8 +518,62 @@ struct elf_s390_link_hash_entry /* Track dynamic relocs copied for this symbol. */ struct elf_s390_dyn_relocs *dyn_relocs; + + /* Number of GOTPLT references for a function. */ + bfd_signed_vma gotplt_refcount; + +#define GOT_UNKNOWN 0 +#define GOT_NORMAL 1 +#define GOT_TLS_GD 2 +#define GOT_TLS_IE 3 +#define GOT_TLS_IE_NLT 3 + unsigned char tls_type; }; +#define elf_s390_hash_entry(ent) \ + ((struct elf_s390_link_hash_entry *)(ent)) + +struct elf_s390_obj_tdata +{ + struct elf_obj_tdata root; + + /* tls_type for each local got entry. */ + char *local_got_tls_type; +}; + +#define elf_s390_tdata(abfd) \ + ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) + +#define elf_s390_local_got_tls_type(abfd) \ + (elf_s390_tdata (abfd)->local_got_tls_type) + +static bfd_boolean +elf_s390_mkobject (abfd) + bfd *abfd; +{ + bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); + abfd->tdata.any = bfd_zalloc (abfd, amt); + if (abfd->tdata.any == NULL) + return FALSE; + return TRUE; +} + +static bfd_boolean +elf_s390_object_p (abfd) + bfd *abfd; +{ + /* Allocate our special target data. */ + struct elf_s390_obj_tdata *new_tdata; + bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); + new_tdata = bfd_zalloc (abfd, amt); + if (new_tdata == NULL) + return FALSE; + new_tdata->root = *abfd->tdata.elf_obj_data; + abfd->tdata.any = new_tdata; + /* Set the right machine number for an s390 elf32 file. */ + return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); +} + /* s390 ELF linker hash table. */ struct elf_s390_link_hash_table @@ -374,6 +589,11 @@ struct elf_s390_link_hash_table asection *sdynbss; asection *srelbss; + union { + bfd_signed_vma refcount; + bfd_vma offset; + } tls_ldm_got; + /* Small local sym to section mapping cache. */ struct sym_sec_cache sym_sec; }; @@ -409,6 +629,8 @@ link_hash_newfunc (entry, table, string) eh = (struct elf_s390_link_hash_entry *) entry; eh->dyn_relocs = NULL; + eh->gotplt_refcount = 0; + eh->tls_type = GOT_UNKNOWN; } return entry; @@ -440,6 +662,7 @@ elf_s390_link_hash_table_create (abfd) ret->srelplt = NULL; ret->sdynbss = NULL; ret->srelbss = NULL; + ret->tls_ldm_got.refcount = 0; ret->sym_sec.abfd = NULL; return &ret->elf.root; @@ -552,9 +775,43 @@ elf_s390_copy_indirect_symbol (bed, dir, ind) 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); } +static int +elf_s390_tls_transition (info, r_type, is_local) + struct bfd_link_info *info; + int r_type; + int is_local; +{ + if (info->shared) + return r_type; + + switch (r_type) + { + case R_390_TLS_GD64: + case R_390_TLS_IE64: + if (is_local) + return R_390_TLS_LE64; + return R_390_TLS_IE64; + case R_390_TLS_GOTIE64: + if (is_local) + return R_390_TLS_LE64; + return R_390_TLS_GOTIE64; + case R_390_TLS_LDM64: + return R_390_TLS_LE64; + } + + return r_type; +} + /* Look through the relocs for a section during the first phase, and allocate space in the global offset table or procedure linkage table. */ @@ -572,6 +829,8 @@ elf_s390_check_relocs (abfd, info, sec, relocs) const Elf_Internal_Rela *rel; const Elf_Internal_Rela *rel_end; asection *sreloc; + bfd_signed_vma *local_got_refcounts; + int tls_type, old_tls_type; if (info->relocateable) return TRUE; @@ -579,12 +838,14 @@ elf_s390_check_relocs (abfd, info, sec, relocs) htab = elf_s390_hash_table (info); symtab_hdr = &elf_tdata (abfd)->symtab_hdr; sym_hashes = elf_sym_hashes (abfd); + local_got_refcounts = elf_local_got_refcounts (abfd); sreloc = NULL; rel_end = relocs + sec->reloc_count; for (rel = relocs; rel < rel_end; rel++) { + unsigned int r_type; unsigned long r_symndx; struct elf_link_hash_entry *h; @@ -603,41 +864,48 @@ elf_s390_check_relocs (abfd, info, sec, relocs) else h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - switch (ELF64_R_TYPE (rel->r_info)) + /* Create got section and local_got_refcounts array if they + are needed. */ + r_type = elf_s390_tls_transition (info, + ELF64_R_TYPE (rel->r_info), + h == NULL); + switch (r_type) { case R_390_GOT12: case R_390_GOT16: case R_390_GOT32: case R_390_GOT64: case R_390_GOTENT: - /* This symbol requires a global offset table entry. */ - if (h != NULL) - { - h->got.refcount += 1; - } - else + case R_390_GOTPLT12: + case R_390_GOTPLT16: + case R_390_GOTPLT32: + case R_390_GOTPLT64: + case R_390_GOTPLTENT: + case R_390_TLS_GD64: + case R_390_TLS_GOTIE12: + case R_390_TLS_GOTIE64: + case R_390_TLS_IEENT: + case R_390_TLS_IE64: + case R_390_TLS_LDM64: + if (h == NULL + && local_got_refcounts == NULL) { - bfd_signed_vma *local_got_refcounts; + bfd_size_type size; - /* This is a global offset table entry for a local symbol. */ - local_got_refcounts = elf_local_got_refcounts (abfd); + size = symtab_hdr->sh_info; + size *= (sizeof (bfd_signed_vma) + sizeof(char)); + local_got_refcounts = ((bfd_signed_vma *) + bfd_zalloc (abfd, size)); 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; + return FALSE; + elf_local_got_refcounts (abfd) = local_got_refcounts; + elf_s390_local_got_tls_type (abfd) + = (char *) (local_got_refcounts + symtab_hdr->sh_info); } - /* Fall through */ - - case R_390_GOTOFF: + /* Fall through. */ + case R_390_GOTOFF16: + case R_390_GOTOFF32: + case R_390_GOTOFF64: case R_390_GOTPC: case R_390_GOTPCDBL: if (htab->sgot == NULL) @@ -647,12 +915,25 @@ elf_s390_check_relocs (abfd, info, sec, relocs) if (!create_got_section (htab->elf.dynobj, info)) return FALSE; } + } + + switch (r_type) + { + case R_390_GOTOFF16: + case R_390_GOTOFF32: + case R_390_GOTOFF64: + case R_390_GOTPC: + case R_390_GOTPCDBL: + /* Got is created, nothing to be done. */ break; case R_390_PLT16DBL: case R_390_PLT32: case R_390_PLT32DBL: case R_390_PLT64: + case R_390_PLTOFF16: + case R_390_PLTOFF32: + case R_390_PLTOFF64: /* 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 which is @@ -662,13 +943,120 @@ elf_s390_check_relocs (abfd, info, sec, relocs) /* If this is a local symbol, we resolve it directly without creating a procedure linkage table entry. */ - if (h == NULL) - continue; + if (h != NULL) + { + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + h->plt.refcount += 1; + } + break; - h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; - h->plt.refcount += 1; + case R_390_GOTPLT12: + case R_390_GOTPLT16: + case R_390_GOTPLT32: + case R_390_GOTPLT64: + case R_390_GOTPLTENT: + /* This symbol requires either a procedure linkage table entry + or an entry in the local got. We actually build the entry + in adjust_dynamic_symbol because whether this is really a + global reference can change and with it the fact if we have + to create a plt entry or a local got entry. To be able to + make a once global symbol a local one we have to keep track + of the number of gotplt references that exist for this + symbol. */ + if (h != NULL) + { + ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + h->plt.refcount += 1; + } + else + local_got_refcounts[r_symndx] += 1; + break; + + case R_390_TLS_LDM64: + htab->tls_ldm_got.refcount += 1; break; + case R_390_TLS_IE64: + case R_390_TLS_GOTIE12: + case R_390_TLS_GOTIE64: + case R_390_TLS_IEENT: + if (info->shared) + info->flags |= DF_STATIC_TLS; + /* Fall through */ + + case R_390_GOT12: + case R_390_GOT16: + case R_390_GOT32: + case R_390_GOT64: + case R_390_GOTENT: + case R_390_TLS_GD64: + /* This symbol requires a global offset table entry. */ + switch (r_type) + { + default: + case R_390_GOT12: + case R_390_GOT16: + case R_390_GOT32: + case R_390_GOTENT: + tls_type = GOT_NORMAL; + break; + case R_390_TLS_GD64: + tls_type = GOT_TLS_GD; + break; + case R_390_TLS_IE64: + case R_390_TLS_GOTIE64: + tls_type = GOT_TLS_IE; + break; + case R_390_TLS_GOTIE12: + case R_390_TLS_IEENT: + tls_type = GOT_TLS_IE_NLT; + break; + } + + if (h != NULL) + { + h->got.refcount += 1; + old_tls_type = elf_s390_hash_entry(h)->tls_type; + } + else + { + local_got_refcounts[r_symndx] += 1; + old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; + } + /* If a TLS symbol is accessed using IE at least once, + there is no point to use dynamic model for it. */ + if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) + { + if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) + { + (*_bfd_error_handler) + (_("%s: `%s' accessed both as normal and thread local symbol"), + bfd_archive_filename (abfd), h->root.root.string); + return FALSE; + } + if (old_tls_type > tls_type) + tls_type = old_tls_type; + } + + if (old_tls_type != tls_type) + { + if (h != NULL) + elf_s390_hash_entry (h)->tls_type = tls_type; + else + elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; + } + + if (r_type != R_390_TLS_IE64) + break; + /* Fall through */ + + case R_390_TLS_LE64: + if (!info->shared) + break; + info->flags |= DF_STATIC_TLS; + /* Fall through */ + case R_390_8: case R_390_16: case R_390_32: @@ -905,6 +1293,7 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) bfd_signed_vma *local_got_refcounts; const Elf_Internal_Rela *rel, *relend; unsigned long r_symndx; + int r_type; struct elf_link_hash_entry *h; elf_section_data (sec)->local_dynrel = NULL; @@ -915,89 +1304,161 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs) relend = relocs + sec->reloc_count; for (rel = relocs; rel < relend; rel++) - switch (ELF64_R_TYPE (rel->r_info)) - { - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT32: - case R_390_GOT64: - case R_390_GOTOFF: - case R_390_GOTPC: - case R_390_GOTPCDBL: - case R_390_GOTENT: - r_symndx = ELF64_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 -= 1; - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - local_got_refcounts[r_symndx] -= 1; - } - break; + { + r_symndx = ELF64_R_SYM (rel->r_info); - case R_390_8: - case R_390_12: - case R_390_16: - case R_390_32: - case R_390_64: - case R_390_PC16: - case R_390_PC16DBL: - case R_390_PC32: - case R_390_PC32DBL: - case R_390_PC64: - r_symndx = ELF64_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - struct elf_s390_link_hash_entry *eh; - struct elf_s390_dyn_relocs **pp; - struct elf_s390_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_s390_link_hash_entry *) h; - - for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) - if (p->sec == sec) + if (r_symndx < symtab_hdr->sh_info) + h = NULL; + else + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + + r_type = elf_s390_tls_transition (info, + ELF64_R_TYPE (rel->r_info), + r_symndx >= symtab_hdr->sh_info); + switch (r_type) + { + case R_390_TLS_LDM64: + if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) + elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; + break; + + case R_390_TLS_GD64: + case R_390_TLS_IE64: + case R_390_TLS_GOTIE12: + case R_390_TLS_GOTIE64: + case R_390_TLS_IEENT: + case R_390_GOT12: + case R_390_GOT16: + case R_390_GOT32: + case R_390_GOT64: + case R_390_GOTOFF16: + case R_390_GOTOFF32: + case R_390_GOTOFF64: + case R_390_GOTPC: + case R_390_GOTPCDBL: + case R_390_GOTENT: + if (h != NULL) + { + if (h->got.refcount > 0) + h->got.refcount -= 1; + } + else if (local_got_refcounts != NULL) + { + if (local_got_refcounts[r_symndx] > 0) + local_got_refcounts[r_symndx] -= 1; + } + if (r_type != R_390_TLS_IE64) + break; + /* Fall through */ + + case R_390_TLS_LE64: + if (!info->shared) + break; + /* Fall through */ + + case R_390_8: + case R_390_12: + case R_390_16: + case R_390_32: + case R_390_64: + case R_390_PC16: + case R_390_PC16DBL: + case R_390_PC32: + case R_390_PC32DBL: + case R_390_PC64: + if (h != NULL) + { + struct elf_s390_link_hash_entry *eh; + struct elf_s390_dyn_relocs **pp; + struct elf_s390_dyn_relocs *p; + + if (!info->shared && h->plt.refcount > 0) + h->plt.refcount -= 1; + + eh = (struct elf_s390_link_hash_entry *) h; + + for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) + if (p->sec == sec) + { + if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 + || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL + || ELF64_R_TYPE (rel->r_info) == R_390_PC32 + || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL + || ELF64_R_TYPE (rel->r_info) == R_390_PC64) + p->pc_count -= 1; + p->count -= 1; + if (p->count == 0) + *pp = p->next; + break; + } + } + break; + + case R_390_PLT16DBL: + case R_390_PLT32: + case R_390_PLT32DBL: + case R_390_PLT64: + case R_390_PLTOFF16: + case R_390_PLTOFF32: + case R_390_PLTOFF64: + if (h != NULL) + { + if (h->plt.refcount > 0) + h->plt.refcount -= 1; + } + break; + + case R_390_GOTPLT12: + case R_390_GOTPLT16: + case R_390_GOTPLT32: + case R_390_GOTPLT64: + case R_390_GOTPLTENT: + if (h != NULL) + { + if (h->plt.refcount > 0) { - if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 - || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL - || ELF64_R_TYPE (rel->r_info) == R_390_PC32) - p->pc_count -= 1; - p->count -= 1; - if (p->count == 0) - *pp = p->next; - break; + ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; + h->plt.refcount -= 1; } - } - break; - - case R_390_PLT16DBL: - case R_390_PLT32: - case R_390_PLT32DBL: - case R_390_PLT64: - r_symndx = ELF64_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 -= 1; - } - break; + } + else if (local_got_refcounts != NULL) + { + if (local_got_refcounts[r_symndx] > 0) + local_got_refcounts[r_symndx] -= 1; + } + break; - default: - break; - } + default: + break; + } + } return TRUE; } +/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT + entry but we found we will not create any. Called when we find we will + not have any PLT for this symbol, by for example + elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, + or elf_s390_size_dynamic_sections if no dynamic sections will be + created (we're only linking static objects). */ + +static void +elf_s390_adjust_gotplt (h) + struct elf_s390_link_hash_entry *h; +{ + if (h->elf.root.type == bfd_link_hash_warning) + h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; + + if (h->gotplt_refcount <= 0) + return; + + /* We simply add the number of gotplt references to the number + * of got references for this symbol. */ + h->elf.got.refcount += h->gotplt_refcount; + h->gotplt_refcount = -1; +} + /* 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 @@ -1035,6 +1496,7 @@ elf_s390_adjust_dynamic_symbol (info, h) linkage table, and we can just do a PC32 reloc instead. */ h->plt.offset = (bfd_vma) -1; h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); } return TRUE; @@ -1171,6 +1633,9 @@ allocate_dynrelocs (h, inf) 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; @@ -1225,18 +1690,41 @@ allocate_dynrelocs (h, inf) { h->plt.offset = (bfd_vma) -1; h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); } } else { h->plt.offset = (bfd_vma) -1; h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); } - if (h->got.refcount > 0) + /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to + the binary, we can optimize a bit. IE64 and GOTIE64 get converted + to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT + we can save the dynamic TLS relocation. */ + if (h->got.refcount > 0 + && !info->shared + && h->dynindx == -1 + && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) + { + if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) + /* For the GOTIE access without a literal pool entry the offset has + to be stored somewhere. The immediate value in the instruction + is not bit enough so the value is stored in the got. */ + { + h->got.offset = htab->sgot->_raw_size; + htab->sgot->_raw_size += GOT_ENTRY_SIZE; + } + else + h->got.offset = (bfd_vma) -1; + } + else if (h->got.refcount > 0) { asection *s; bfd_boolean dyn; + int tls_type = elf_s390_hash_entry(h)->tls_type; /* Make sure this symbol is output as a dynamic symbol. Undefined weak syms won't yet be marked as dynamic. */ @@ -1250,8 +1738,18 @@ allocate_dynrelocs (h, inf) s = htab->sgot; h->got.offset = s->_raw_size; s->_raw_size += GOT_ENTRY_SIZE; + /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ + if (tls_type == GOT_TLS_GD) + s->_raw_size += GOT_ENTRY_SIZE; dyn = htab->elf.dynamic_sections_created; - if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) + /* R_390_TLS_IE64 needs one dynamic relocation, + R_390_TLS_GD64 needs one if local symbol and two if global. */ + if ((tls_type == GOT_TLS_GD && h->dynindx == -1) + || tls_type >= GOT_TLS_IE) + htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); + else if (tls_type == GOT_TLS_GD) + htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela); + else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); } else @@ -1397,6 +1895,7 @@ elf_s390_size_dynamic_sections (output_bfd, info) { bfd_signed_vma *local_got; bfd_signed_vma *end_local_got; + char *local_tls_type; bfd_size_type locsymcount; Elf_Internal_Shdr *symtab_hdr; asection *srela; @@ -1438,14 +1937,17 @@ elf_s390_size_dynamic_sections (output_bfd, info) symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; locsymcount = symtab_hdr->sh_info; end_local_got = local_got + locsymcount; + local_tls_type = elf_s390_local_got_tls_type (ibfd); s = htab->sgot; srela = htab->srelgot; - for (; local_got < end_local_got; ++local_got) + for (; local_got < end_local_got; ++local_got, ++local_tls_type) { if (*local_got > 0) { *local_got = s->_raw_size; s->_raw_size += GOT_ENTRY_SIZE; + if (*local_tls_type == GOT_TLS_GD) + s->_raw_size += GOT_ENTRY_SIZE; if (info->shared) srela->_raw_size += sizeof (Elf64_External_Rela); } @@ -1454,6 +1956,17 @@ elf_s390_size_dynamic_sections (output_bfd, info) } } + if (htab->tls_ldm_got.refcount > 0) + { + /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 + relocs. */ + htab->tls_ldm_got.offset = htab->sgot->_raw_size; + htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE; + htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); + } + else + htab->tls_ldm_got.offset = -1; + /* Allocate global sym .plt and .got entries, and space for global sym dynamic relocs. */ elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); @@ -1564,6 +2077,58 @@ elf_s390_size_dynamic_sections (output_bfd, info) return TRUE; } +/* Return the base VMA address which should be subtracted from real addresses + when resolving @dtpoff relocation. + This is PT_TLS segment p_vaddr. */ + +static bfd_vma +dtpoff_base (info) + struct bfd_link_info *info; +{ + /* If tls_segment is NULL, we should have signalled an error already. */ + if (elf_hash_table (info)->tls_segment == NULL) + return 0; + return elf_hash_table (info)->tls_segment->start; +} + +/* Return the relocation value for @tpoff relocation + if STT_TLS virtual address is ADDRESS. */ + +static bfd_vma +tpoff (info, address) + struct bfd_link_info *info; + bfd_vma address; +{ + struct elf_link_tls_segment *tls_segment + = elf_hash_table (info)->tls_segment; + + /* If tls_segment is NULL, we should have signalled an error already. */ + if (tls_segment == NULL) + return 0; + return (align_power (tls_segment->size, tls_segment->align) + + tls_segment->start - address); +} + +/* Complain if TLS instruction relocation is against an invalid + instruction. */ + +static void +invalid_tls_insn (input_bfd, input_section, rel) + bfd *input_bfd; + asection *input_section; + Elf_Internal_Rela *rel; +{ + reloc_howto_type *howto; + + howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); + (*_bfd_error_handler) + (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"), + bfd_archive_filename (input_bfd), + bfd_get_section_name (input_bfd, input_section), + (long) rel->r_offset, + howto->name); +} + /* Relocate a 390 ELF section. */ static bfd_boolean @@ -1597,7 +2162,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, relend = relocs + input_section->reloc_count; for (; rel < relend; rel++) { - int r_type; + unsigned int r_type; reloc_howto_type *howto; unsigned long r_symndx; struct elf_link_hash_entry *h; @@ -1607,12 +2172,13 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, bfd_vma relocation; bfd_boolean unresolved_reloc; bfd_reloc_status_type r; + int tls_type; r_type = ELF64_R_TYPE (rel->r_info); if (r_type == (int) R_390_GNU_VTINHERIT || r_type == (int) R_390_GNU_VTENTRY) continue; - if (r_type < 0 || r_type >= (int) R_390_max) + if (r_type >= (int) R_390_max) { bfd_set_error (bfd_error_bad_value); return FALSE; @@ -1620,6 +2186,8 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, howto = elf_howto_table + r_type; r_symndx = ELF64_R_SYM (rel->r_info); + + /* This is a final link. */ h = NULL; sym = NULL; sec = NULL; @@ -1676,6 +2244,40 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, switch (r_type) { + case R_390_GOTPLT12: + case R_390_GOTPLT16: + case R_390_GOTPLT32: + case R_390_GOTPLT64: + case R_390_GOTPLTENT: + /* There are three cases for a GOTPLT relocation. 1) The + relocation is against the jump slot entry of a plt that + will get emitted to the output file. 2) The relocation + is against the jump slot of a plt entry that has been + removed. elf_s390_adjust_gotplt has created a GOT entry + as replacement. 3) The relocation is against a local symbol. + Cases 2) and 3) are the same as the GOT relocation code + so we just have to test for case 1 and fall through for + the other two. */ + if (h != NULL && h->plt.offset != (bfd_vma) -1) + { + bfd_vma plt_index; + + /* Calc. index no. + Current offset - size first entry / entry size. */ + plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / + PLT_ENTRY_SIZE; + + /* Offset in GOT is PLT index plus GOT headers(3) times 4, + addr & GOT addr. */ + relocation = (plt_index + 3) * GOT_ENTRY_SIZE; + unresolved_reloc = FALSE; + + if (r_type == R_390_GOTPLTENT) + relocation += htab->sgot->output_section->vma; + break; + } + /* Fall through. */ + case R_390_GOT12: case R_390_GOT16: case R_390_GOT32: @@ -1775,12 +2377,15 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, * between the start of the GOT and the symbols entry. We * add the vma of the GOT to get the correct value. */ - if (r_type == R_390_GOTENT) + if ( r_type == R_390_GOTENT + || r_type == R_390_GOTPLTENT) relocation += htab->sgot->output_section->vma; break; - case R_390_GOTOFF: + case R_390_GOTOFF16: + case R_390_GOTOFF32: + case R_390_GOTOFF64: /* Relocation is relative to the start of the global offset table. */ @@ -1790,7 +2395,6 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, permitted by the ABI, we might have to change this calculation. */ relocation -= htab->sgot->output_section->vma; - break; case R_390_GOTPC: @@ -1825,6 +2429,29 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, + htab->splt->output_offset + h->plt.offset); unresolved_reloc = FALSE; + break; + + case R_390_PLTOFF16: + case R_390_PLTOFF32: + case R_390_PLTOFF64: + /* Relocation is to the entry for this symbol in the + procedure linkage table relative to the start of the GOT. */ + + /* For local symbols or if we didn't make a PLT entry for + this symbol resolve the symbol directly. */ + if ( h == NULL + || h->plt.offset == (bfd_vma) -1 + || htab->splt == NULL) + { + relocation -= htab->sgot->output_section->vma; + break; + } + + relocation = (htab->splt->output_section->vma + + htab->splt->output_offset + + h->plt.offset + - htab->sgot->output_section->vma); + unresolved_reloc = FALSE; break; case R_390_8: @@ -1931,6 +2558,346 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, break; + /* Relocations for tls literal pool entries. */ + case R_390_TLS_IE64: + if (info->shared) + { + Elf_Internal_Rela outrel; + asection *sreloc; + bfd_byte *loc; + + outrel.r_offset = rel->r_offset + + input_section->output_section->vma + + input_section->output_offset; + outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); + sreloc = elf_section_data (input_section)->sreloc; + if (sreloc == NULL) + abort (); + loc = sreloc->contents; + loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); + } + /* Fall through */ + + case R_390_TLS_GD64: + case R_390_TLS_GOTIE64: + r_type = elf_s390_tls_transition (info, r_type, h == NULL); + tls_type = GOT_UNKNOWN; + if (h == NULL && local_got_offsets) + tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; + else if (h != NULL) + { + tls_type = elf_s390_hash_entry(h)->tls_type; + if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) + r_type = R_390_TLS_LE64; + } + if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) + r_type = R_390_TLS_IE64; + + if (r_type == R_390_TLS_LE64) + { + /* This relocation gets optimized away by the local exec + access optimization. */ + BFD_ASSERT (! unresolved_reloc); + bfd_put_64 (output_bfd, -tpoff (info, relocation), + contents + rel->r_offset); + continue; + } + + if (htab->sgot == NULL) + abort (); + + if (h != NULL) + off = h->got.offset; + else + { + if (local_got_offsets == NULL) + abort (); + + off = local_got_offsets[r_symndx]; + } + + emit_tls_relocs: + + if ((off & 1) != 0) + off &= ~1; + else + { + Elf_Internal_Rela outrel; + bfd_byte *loc; + int dr_type, indx; + + if (htab->srelgot == NULL) + abort (); + + outrel.r_offset = (htab->sgot->output_section->vma + + htab->sgot->output_offset + off); + + indx = h && h->dynindx != -1 ? h->dynindx : 0; + if (r_type == R_390_TLS_GD64) + dr_type = R_390_TLS_DTPMOD; + else + dr_type = R_390_TLS_TPOFF; + if (dr_type == R_390_TLS_TPOFF && indx == 0) + outrel.r_addend = relocation - dtpoff_base (info); + else + outrel.r_addend = 0; + outrel.r_info = ELF64_R_INFO (indx, dr_type); + loc = htab->srelgot->contents; + loc += htab->srelgot->reloc_count++ + * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + + if (r_type == R_390_TLS_GD64) + { + if (indx == 0) + { + BFD_ASSERT (! unresolved_reloc); + bfd_put_64 (output_bfd, + relocation - dtpoff_base (info), + htab->sgot->contents + off + GOT_ENTRY_SIZE); + } + else + { + outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); + outrel.r_offset += GOT_ENTRY_SIZE; + outrel.r_addend = 0; + htab->srelgot->reloc_count++; + loc += sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + } + } + + if (h != NULL) + h->got.offset |= 1; + else + local_got_offsets[r_symndx] |= 1; + } + + if (off >= (bfd_vma) -2) + abort (); + if (r_type == ELF64_R_TYPE (rel->r_info)) + { + relocation = htab->sgot->output_offset + off; + if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) + relocation += htab->sgot->output_section->vma; + unresolved_reloc = FALSE; + } + else + { + bfd_put_64 (output_bfd, htab->sgot->output_offset + off, + contents + rel->r_offset); + continue; + } + break; + + case R_390_TLS_GOTIE12: + case R_390_TLS_IEENT: + if (h == NULL) + { + if (local_got_offsets == NULL) + abort(); + off = local_got_offsets[r_symndx]; + if (info->shared) + goto emit_tls_relocs; + } + else + { + off = h->got.offset; + tls_type = elf_s390_hash_entry(h)->tls_type; + if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) + goto emit_tls_relocs; + } + + if (htab->sgot == NULL) + abort (); + + BFD_ASSERT (! unresolved_reloc); + bfd_put_64 (output_bfd, -tpoff (info, relocation), + htab->sgot->contents + off); + relocation = htab->sgot->output_offset + off; + if (r_type == R_390_TLS_IEENT) + relocation += htab->sgot->output_section->vma; + unresolved_reloc = FALSE; + break; + + case R_390_TLS_LDM64: + if (! info->shared) + /* The literal pool entry this relocation refers to gets ignored + by the optimized code of the local exec model. Do nothing + and the value will turn out zero. */ + continue; + + if (htab->sgot == NULL) + abort (); + + off = htab->tls_ldm_got.offset; + if (off & 1) + off &= ~1; + else + { + Elf_Internal_Rela outrel; + bfd_byte *loc; + + if (htab->srelgot == NULL) + abort (); + + outrel.r_offset = (htab->sgot->output_section->vma + + htab->sgot->output_offset + off); + + bfd_put_64 (output_bfd, 0, + htab->sgot->contents + off + GOT_ENTRY_SIZE); + outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); + outrel.r_addend = 0; + loc = htab->srelgot->contents; + loc += htab->srelgot->reloc_count++ + * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + htab->tls_ldm_got.offset |= 1; + } + relocation = htab->sgot->output_offset + off; + unresolved_reloc = FALSE; + break; + + case R_390_TLS_LE64: + if (info->shared) + { + /* Linking a shared library with non-fpic code requires + a R_390_TLS_TPOFF relocation. */ + Elf_Internal_Rela outrel; + asection *sreloc; + bfd_byte *loc; + int indx; + + outrel.r_offset = rel->r_offset + + input_section->output_section->vma + + input_section->output_offset; + if (h != NULL && h->dynindx != -1) + indx = h->dynindx; + else + indx = 0; + outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); + if (indx == 0) + outrel.r_addend = relocation - dtpoff_base (info); + else + outrel.r_addend = 0; + sreloc = elf_section_data (input_section)->sreloc; + if (sreloc == NULL) + abort (); + loc = sreloc->contents; + loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + } + else + { + BFD_ASSERT (! unresolved_reloc); + bfd_put_64 (output_bfd, -tpoff (info, relocation), + contents + rel->r_offset); + } + continue; + + case R_390_TLS_LDO64: + if (info->shared || (input_section->flags & SEC_CODE) == 0) + relocation -= dtpoff_base (info); + else + /* When converting LDO to LE, we must negate. */ + relocation = -tpoff (info, relocation); + break; + + /* Relocations for tls instructions. */ + case R_390_TLS_LOAD: + case R_390_TLS_GDCALL: + case R_390_TLS_LDCALL: + tls_type = GOT_UNKNOWN; + if (h == NULL && local_got_offsets) + tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; + else if (h != NULL) + tls_type = elf_s390_hash_entry(h)->tls_type; + + if (tls_type == GOT_TLS_GD) + continue; + + if (r_type == R_390_TLS_LOAD) + { + if (!info->shared && (h == NULL || h->dynindx == -1)) + { + /* IE->LE transition. Four valid cases: + lg %rx,(0,%ry) -> sllg %rx,%ry,0 + lg %rx,(%ry,0) -> sllg %rx,%ry,0 + lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 + lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ + unsigned int insn0, insn1, ry; + + insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); + insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); + if (insn1 != 0x0004) + invalid_tls_insn (input_bfd, input_section, rel); + ry = 0; + if ((insn0 & 0xff00f000) == 0xe3000000) + /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ + ry = (insn0 & 0x000f0000); + else if ((insn0 & 0xff0f0000) == 0xe3000000) + /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ + ry = (insn0 & 0x0000f000) << 4; + else if ((insn0 & 0xff00f000) == 0xe300c000) + /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ + ry = (insn0 & 0x000f0000); + else if ((insn0 & 0xff0f0000) == 0xe30c0000) + /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ + ry = (insn0 & 0x0000f000) << 4; + else + invalid_tls_insn (input_bfd, input_section, rel); + insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; + insn1 = 0x000d; + bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); + bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); + } + } + else if (r_type == R_390_TLS_GDCALL) + { + unsigned int insn0, insn1; + + insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); + insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); + if ((insn0 & 0xffff0000) != 0xc0e50000) + invalid_tls_insn (input_bfd, input_section, rel); + if (!info->shared && (h == NULL || h->dynindx == -1)) + { + /* GD->LE transition. + brasl %r14,__tls_get_addr@plt -> brcl 0,. */ + insn0 = 0xc0040000; + insn1 = 0x0000; + } + else + { + /* GD->IE transition. + brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ + insn0 = 0xe322c000; + insn1 = 0x0004; + } + bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); + bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); + } + else if (r_type == R_390_TLS_LDCALL) + { + if (!info->shared) + { + unsigned int insn0, insn1; + + insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); + insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); + if ((insn0 & 0xffff0000) != 0xc0e50000) + invalid_tls_insn (input_bfd, input_section, rel); + /* LD->LE transition. + brasl %r14,__tls_get_addr@plt -> brcl 0,. */ + insn0 = 0xc0040000; + insn1 = 0x0000; + bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); + bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); + } + } + continue; + default: break; } @@ -2090,7 +3057,10 @@ elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) } } - if (h->got.offset != (bfd_vma) -1) + if (h->got.offset != (bfd_vma) -1 + && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD + && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE + && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) { Elf_Internal_Rela rela; bfd_byte *loc; @@ -2308,13 +3278,6 @@ elf_s390_finish_dynamic_sections (output_bfd, info) return TRUE; } -static bfd_boolean -elf_s390_object_p (abfd) - bfd *abfd; -{ - return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); -} - /* * Why was the hash table entry size definition changed from * ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and @@ -2388,6 +3351,7 @@ const struct elf_size_info s390_elf64_size_info = #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections #define elf_backend_reloc_type_class elf_s390_reloc_type_class -#define elf_backend_object_p elf_s390_object_p +#define bfd_elf64_mkobject elf_s390_mkobject +#define elf_backend_object_p elf_s390_object_p #include "elf64-target.h" |