diff options
| -rw-r--r-- | bfd/ChangeLog | 5 | ||||
| -rw-r--r-- | bfd/elf64-alpha.c | 2867 |
2 files changed, 1293 insertions, 1579 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 5c3466f..40a5e44 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,10 @@ 2005-05-25 Richard Henderson <rth@redhat.com> + * elf64-alpha.c: Update all function definitions to ISO C. Remove + all function prototypes; rearrange functions into def-use order. + +2005-05-25 Richard Henderson <rth@redhat.com> + * elf64-alpha.c (elf64_alpha_merge_gots): Fix gotent iteration in the presence of deleting elements. (elf64_alpha_size_got_sections): Zero dead got section size. diff --git a/bfd/elf64-alpha.c b/bfd/elf64-alpha.c index e13f260..fd0d052 100644 --- a/bfd/elf64-alpha.c +++ b/bfd/elf64-alpha.c @@ -47,114 +47,6 @@ #define ECOFF_64 #include "ecoffswap.h" -static bfd_boolean alpha_elf_dynamic_symbol_p - PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *)); -static struct bfd_hash_entry * elf64_alpha_link_hash_newfunc - PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); -static struct bfd_link_hash_table * elf64_alpha_bfd_link_hash_table_create - PARAMS ((bfd *)); - -static bfd_reloc_status_type elf64_alpha_reloc_nil - PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); -static bfd_reloc_status_type elf64_alpha_reloc_bad - PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); -static bfd_reloc_status_type elf64_alpha_do_reloc_gpdisp - PARAMS ((bfd *, bfd_vma, bfd_byte *, bfd_byte *)); -static bfd_reloc_status_type elf64_alpha_reloc_gpdisp - PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); - -static reloc_howto_type * elf64_alpha_bfd_reloc_type_lookup - PARAMS ((bfd *, bfd_reloc_code_real_type)); -static void elf64_alpha_info_to_howto - PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); - -static bfd_boolean elf64_alpha_mkobject - PARAMS ((bfd *)); -static bfd_boolean elf64_alpha_object_p - PARAMS ((bfd *)); -static bfd_boolean elf64_alpha_section_flags - PARAMS ((flagword *, const Elf_Internal_Shdr *)); -static bfd_boolean elf64_alpha_fake_sections - PARAMS ((bfd *, Elf_Internal_Shdr *, asection *)); -static bfd_boolean elf64_alpha_create_got_section - PARAMS ((bfd *, struct bfd_link_info *)); -static bfd_boolean elf64_alpha_create_dynamic_sections - PARAMS ((bfd *, struct bfd_link_info *)); - -static bfd_boolean elf64_alpha_read_ecoff_info - PARAMS ((bfd *, asection *, struct ecoff_debug_info *)); -static bfd_boolean elf64_alpha_is_local_label_name - PARAMS ((bfd *, const char *)); -static bfd_boolean elf64_alpha_find_nearest_line - PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **, - const char **, unsigned int *)); - -#if defined(__STDC__) || defined(ALMOST_STDC) -struct alpha_elf_link_hash_entry; -#endif - -static bfd_boolean elf64_alpha_output_extsym - PARAMS ((struct alpha_elf_link_hash_entry *, PTR)); - -static bfd_boolean elf64_alpha_can_merge_gots - PARAMS ((bfd *, bfd *)); -static void elf64_alpha_merge_gots - PARAMS ((bfd *, bfd *)); -static bfd_boolean elf64_alpha_calc_got_offsets_for_symbol - PARAMS ((struct alpha_elf_link_hash_entry *, PTR)); -static void elf64_alpha_calc_got_offsets - PARAMS ((struct bfd_link_info *)); -static bfd_boolean elf64_alpha_size_got_sections - PARAMS ((struct bfd_link_info *)); -static bfd_boolean elf64_alpha_size_plt_section - PARAMS ((struct bfd_link_info *)); -static bfd_boolean elf64_alpha_size_plt_section_1 - PARAMS ((struct alpha_elf_link_hash_entry *, PTR)); -static bfd_boolean elf64_alpha_always_size_sections - PARAMS ((bfd *, struct bfd_link_info *)); -static int alpha_dynamic_entries_for_reloc - PARAMS ((int, int, int)); -static bfd_boolean elf64_alpha_calc_dynrel_sizes - PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *)); -static bfd_boolean elf64_alpha_size_rela_got_section - PARAMS ((struct bfd_link_info *)); -static bfd_boolean elf64_alpha_size_rela_got_1 - PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *)); -static bfd_boolean elf64_alpha_add_symbol_hook - PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Sym *, - const char **, flagword *, asection **, bfd_vma *)); -static struct alpha_elf_got_entry *get_got_entry - PARAMS ((bfd *, struct alpha_elf_link_hash_entry *, unsigned long, - unsigned long, bfd_vma)); -static bfd_boolean elf64_alpha_check_relocs - PARAMS ((bfd *, struct bfd_link_info *, asection *sec, - const Elf_Internal_Rela *)); -static bfd_boolean elf64_alpha_adjust_dynamic_symbol - PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); -static bfd_boolean elf64_alpha_size_dynamic_sections - PARAMS ((bfd *, struct bfd_link_info *)); -static void elf64_alpha_emit_dynrel - PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, - bfd_vma, long, long, bfd_vma)); -static bfd_boolean elf64_alpha_relocate_section_r - PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, - Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); -static bfd_boolean elf64_alpha_relocate_section - PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, - Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); -static bfd_boolean elf64_alpha_finish_dynamic_symbol - PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, - Elf_Internal_Sym *)); -static bfd_boolean elf64_alpha_finish_dynamic_sections - PARAMS ((bfd *, struct bfd_link_info *)); -static bfd_boolean elf64_alpha_final_link - PARAMS ((bfd *, struct bfd_link_info *)); -static bfd_boolean elf64_alpha_merge_ind_symbols - PARAMS ((struct alpha_elf_link_hash_entry *, PTR)); -static Elf_Internal_Rela * elf64_alpha_find_reloc_at_ofs - PARAMS ((Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_vma, int)); -static enum elf_reloc_type_class elf64_alpha_reloc_type_class - PARAMS ((const Elf_Internal_Rela *)); struct alpha_elf_link_hash_entry { @@ -254,7 +146,7 @@ struct alpha_elf_link_hash_table #define alpha_elf_link_hash_traverse(table, func, info) \ (elf_link_hash_traverse \ (&(table)->root, \ - (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ + (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \ (info))) /* Get the Alpha ELF linker hash table from a link_info structure. */ @@ -273,9 +165,8 @@ struct alpha_elf_link_hash_table address is ever taken. */ static inline bfd_boolean -alpha_elf_dynamic_symbol_p (h, info) - struct elf_link_hash_entry *h; - struct bfd_link_info *info; +alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, + struct bfd_link_info *info) { return _bfd_elf_dynamic_symbol_p (h, info, 0); } @@ -283,10 +174,9 @@ alpha_elf_dynamic_symbol_p (h, info) /* Create an entry in a Alpha ELF linker hash table. */ static struct bfd_hash_entry * -elf64_alpha_link_hash_newfunc (entry, table, string) - struct bfd_hash_entry *entry; - struct bfd_hash_table *table; - const char *string; +elf64_alpha_link_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) { struct alpha_elf_link_hash_entry *ret = (struct alpha_elf_link_hash_entry *) entry; @@ -322,8 +212,7 @@ elf64_alpha_link_hash_newfunc (entry, table, string) /* Create a Alpha ELF linker hash table. */ static struct bfd_link_hash_table * -elf64_alpha_bfd_link_hash_table_create (abfd) - bfd *abfd; +elf64_alpha_bfd_link_hash_table_create (bfd *abfd) { struct alpha_elf_link_hash_table *ret; bfd_size_type amt = sizeof (struct alpha_elf_link_hash_table); @@ -377,8 +266,7 @@ struct alpha_elf_obj_tdata ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any) static bfd_boolean -elf64_alpha_mkobject (abfd) - bfd *abfd; +elf64_alpha_mkobject (bfd *abfd) { bfd_size_type amt = sizeof (struct alpha_elf_obj_tdata); abfd->tdata.any = bfd_zalloc (abfd, amt); @@ -388,13 +276,123 @@ elf64_alpha_mkobject (abfd) } static bfd_boolean -elf64_alpha_object_p (abfd) - bfd *abfd; +elf64_alpha_object_p (bfd *abfd) { /* Set the right machine number for an Alpha ELF file. */ return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0); } +/* A relocation function which doesn't do anything. */ + +static bfd_reloc_status_type +elf64_alpha_reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc, + asymbol *sym ATTRIBUTE_UNUSED, + PTR data ATTRIBUTE_UNUSED, asection *sec, + bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) +{ + if (output_bfd) + reloc->address += sec->output_offset; + return bfd_reloc_ok; +} + +/* A relocation function used for an unsupported reloc. */ + +static bfd_reloc_status_type +elf64_alpha_reloc_bad (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc, + asymbol *sym ATTRIBUTE_UNUSED, + PTR data ATTRIBUTE_UNUSED, asection *sec, + bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) +{ + if (output_bfd) + reloc->address += sec->output_offset; + return bfd_reloc_notsupported; +} + +/* Do the work of the GPDISP relocation. */ + +static bfd_reloc_status_type +elf64_alpha_do_reloc_gpdisp (bfd *abfd, bfd_vma gpdisp, bfd_byte *p_ldah, + bfd_byte *p_lda) +{ + bfd_reloc_status_type ret = bfd_reloc_ok; + bfd_vma addend; + unsigned long i_ldah, i_lda; + + i_ldah = bfd_get_32 (abfd, p_ldah); + i_lda = bfd_get_32 (abfd, p_lda); + + /* Complain if the instructions are not correct. */ + if (((i_ldah >> 26) & 0x3f) != 0x09 + || ((i_lda >> 26) & 0x3f) != 0x08) + ret = bfd_reloc_dangerous; + + /* Extract the user-supplied offset, mirroring the sign extensions + that the instructions perform. */ + addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff); + addend = (addend ^ 0x80008000) - 0x80008000; + + gpdisp += addend; + + if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000 + || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000) + ret = bfd_reloc_overflow; + + /* compensate for the sign extension again. */ + i_ldah = ((i_ldah & 0xffff0000) + | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff)); + i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff); + + bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah); + bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda); + + return ret; +} + +/* The special function for the GPDISP reloc. */ + +static bfd_reloc_status_type +elf64_alpha_reloc_gpdisp (bfd *abfd, arelent *reloc_entry, + asymbol *sym ATTRIBUTE_UNUSED, PTR data, + asection *input_section, bfd *output_bfd, + char **err_msg) +{ + bfd_reloc_status_type ret; + bfd_vma gp, relocation; + bfd_vma high_address; + bfd_byte *p_ldah, *p_lda; + + /* Don't do anything if we're not doing a final link. */ + if (output_bfd) + { + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; + } + + high_address = bfd_get_section_limit (abfd, input_section); + if (reloc_entry->address > high_address + || reloc_entry->address + reloc_entry->addend > high_address) + return bfd_reloc_outofrange; + + /* The gp used in the portion of the output object to which this + input object belongs is cached on the input bfd. */ + gp = _bfd_get_gp_value (abfd); + + relocation = (input_section->output_section->vma + + input_section->output_offset + + reloc_entry->address); + + p_ldah = (bfd_byte *) data + reloc_entry->address; + p_lda = p_ldah + reloc_entry->addend; + + ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda); + + /* Complain if the instructions are not correct. */ + if (ret == bfd_reloc_dangerous) + *err_msg = _("GPDISP relocation did not find ldah and lda instructions"); + + return ret; +} + /* In case we're on a 32-bit machine, construct a 64-bit "-1" value from smaller values. Start with zero, widen, *then* decrement. */ #define MINUS_ONE (((bfd_vma)0) - 1) @@ -942,133 +940,6 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE), /* pcrel_offset */ }; -/* A relocation function which doesn't do anything. */ - -static bfd_reloc_status_type -elf64_alpha_reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message) - bfd *abfd ATTRIBUTE_UNUSED; - arelent *reloc; - asymbol *sym ATTRIBUTE_UNUSED; - PTR data ATTRIBUTE_UNUSED; - asection *sec; - bfd *output_bfd; - char **error_message ATTRIBUTE_UNUSED; -{ - if (output_bfd) - reloc->address += sec->output_offset; - return bfd_reloc_ok; -} - -/* A relocation function used for an unsupported reloc. */ - -static bfd_reloc_status_type -elf64_alpha_reloc_bad (abfd, reloc, sym, data, sec, output_bfd, error_message) - bfd *abfd ATTRIBUTE_UNUSED; - arelent *reloc; - asymbol *sym ATTRIBUTE_UNUSED; - PTR data ATTRIBUTE_UNUSED; - asection *sec; - bfd *output_bfd; - char **error_message ATTRIBUTE_UNUSED; -{ - if (output_bfd) - reloc->address += sec->output_offset; - return bfd_reloc_notsupported; -} - -/* Do the work of the GPDISP relocation. */ - -static bfd_reloc_status_type -elf64_alpha_do_reloc_gpdisp (abfd, gpdisp, p_ldah, p_lda) - bfd *abfd; - bfd_vma gpdisp; - bfd_byte *p_ldah; - bfd_byte *p_lda; -{ - bfd_reloc_status_type ret = bfd_reloc_ok; - bfd_vma addend; - unsigned long i_ldah, i_lda; - - i_ldah = bfd_get_32 (abfd, p_ldah); - i_lda = bfd_get_32 (abfd, p_lda); - - /* Complain if the instructions are not correct. */ - if (((i_ldah >> 26) & 0x3f) != 0x09 - || ((i_lda >> 26) & 0x3f) != 0x08) - ret = bfd_reloc_dangerous; - - /* Extract the user-supplied offset, mirroring the sign extensions - that the instructions perform. */ - addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff); - addend = (addend ^ 0x80008000) - 0x80008000; - - gpdisp += addend; - - if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000 - || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000) - ret = bfd_reloc_overflow; - - /* compensate for the sign extension again. */ - i_ldah = ((i_ldah & 0xffff0000) - | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff)); - i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff); - - bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah); - bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda); - - return ret; -} - -/* The special function for the GPDISP reloc. */ - -static bfd_reloc_status_type -elf64_alpha_reloc_gpdisp (abfd, reloc_entry, sym, data, input_section, - output_bfd, err_msg) - bfd *abfd; - arelent *reloc_entry; - asymbol *sym ATTRIBUTE_UNUSED; - PTR data; - asection *input_section; - bfd *output_bfd; - char **err_msg; -{ - bfd_reloc_status_type ret; - bfd_vma gp, relocation; - bfd_vma high_address; - bfd_byte *p_ldah, *p_lda; - - /* Don't do anything if we're not doing a final link. */ - if (output_bfd) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - high_address = bfd_get_section_limit (abfd, input_section); - if (reloc_entry->address > high_address - || reloc_entry->address + reloc_entry->addend > high_address) - return bfd_reloc_outofrange; - - /* The gp used in the portion of the output object to which this - input object belongs is cached on the input bfd. */ - gp = _bfd_get_gp_value (abfd); - - relocation = (input_section->output_section->vma - + input_section->output_offset - + reloc_entry->address); - - p_ldah = (bfd_byte *) data + reloc_entry->address; - p_lda = p_ldah + reloc_entry->addend; - - ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda); - - /* Complain if the instructions are not correct. */ - if (ret == bfd_reloc_dangerous) - *err_msg = _("GPDISP relocation did not find ldah and lda instructions"); - - return ret; -} - /* A mapping from BFD reloc types to Alpha ELF reloc types. */ struct elf_reloc_map @@ -1114,9 +985,8 @@ static const struct elf_reloc_map elf64_alpha_reloc_map[] = /* Given a BFD reloc type, return a HOWTO structure. */ static reloc_howto_type * -elf64_alpha_bfd_reloc_type_lookup (abfd, code) - bfd *abfd ATTRIBUTE_UNUSED; - bfd_reloc_code_real_type code; +elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) { const struct elf_reloc_map *i, *e; i = e = elf64_alpha_reloc_map; @@ -1132,14 +1002,10 @@ elf64_alpha_bfd_reloc_type_lookup (abfd, code) /* Given an Alpha ELF reloc type, fill in an arelent structure. */ static void -elf64_alpha_info_to_howto (abfd, cache_ptr, dst) - bfd *abfd ATTRIBUTE_UNUSED; - arelent *cache_ptr; - Elf_Internal_Rela *dst; +elf64_alpha_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, + Elf_Internal_Rela *dst) { - unsigned r_type; - - r_type = ELF64_R_TYPE(dst->r_info); + unsigned r_type = ELF64_R_TYPE(dst->r_info); BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max); cache_ptr->howto = &elf64_alpha_howto_table[r_type]; } @@ -1159,1117 +1025,6 @@ elf64_alpha_info_to_howto (abfd, cache_ptr, dst) - align_power ((bfd_vma) 16, \ elf_hash_table (info)->tls_sec->alignment_power)) -/* These functions do relaxation for Alpha ELF. - - Currently I'm only handling what I can do with existing compiler - and assembler support, which means no instructions are removed, - though some may be nopped. At this time GCC does not emit enough - information to do all of the relaxing that is possible. It will - take some not small amount of work for that to happen. - - There are a couple of interesting papers that I once read on this - subject, that I cannot find references to at the moment, that - related to Alpha in particular. They are by David Wall, then of - DEC WRL. */ - -#define OP_LDA 0x08 -#define OP_LDAH 0x09 -#define INSN_JSR 0x68004000 -#define INSN_JSR_MASK 0xfc00c000 -#define OP_LDQ 0x29 -#define OP_BR 0x30 -#define OP_BSR 0x34 -#define INSN_UNOP 0x2ffe0000 -#define INSN_ADDQ 0x40000400 -#define INSN_RDUNIQ 0x0000009e - -struct alpha_relax_info -{ - bfd *abfd; - asection *sec; - bfd_byte *contents; - Elf_Internal_Shdr *symtab_hdr; - Elf_Internal_Rela *relocs, *relend; - struct bfd_link_info *link_info; - bfd_vma gp; - bfd *gotobj; - asection *tsec; - struct alpha_elf_link_hash_entry *h; - struct alpha_elf_got_entry **first_gotent; - struct alpha_elf_got_entry *gotent; - bfd_boolean changed_contents; - bfd_boolean changed_relocs; - unsigned char other; -}; - -static bfd_boolean elf64_alpha_relax_with_lituse - PARAMS((struct alpha_relax_info *info, bfd_vma symval, - Elf_Internal_Rela *irel)); -static bfd_vma elf64_alpha_relax_opt_call - PARAMS((struct alpha_relax_info *info, bfd_vma symval)); -static bfd_boolean elf64_alpha_relax_got_load - PARAMS((struct alpha_relax_info *info, bfd_vma symval, - Elf_Internal_Rela *irel, unsigned long)); -static bfd_boolean elf64_alpha_relax_gprelhilo - PARAMS((struct alpha_relax_info *info, bfd_vma symval, - Elf_Internal_Rela *irel, bfd_boolean)); -static bfd_boolean elf64_alpha_relax_tls_get_addr - PARAMS((struct alpha_relax_info *info, bfd_vma symval, - Elf_Internal_Rela *irel, bfd_boolean)); -static bfd_boolean elf64_alpha_relax_section - PARAMS((bfd *abfd, asection *sec, struct bfd_link_info *link_info, - bfd_boolean *again)); - -static Elf_Internal_Rela * -elf64_alpha_find_reloc_at_ofs (rel, relend, offset, type) - Elf_Internal_Rela *rel, *relend; - bfd_vma offset; - int type; -{ - while (rel < relend) - { - if (rel->r_offset == offset - && ELF64_R_TYPE (rel->r_info) == (unsigned int) type) - return rel; - ++rel; - } - return NULL; -} - -static bfd_boolean -elf64_alpha_relax_with_lituse (info, symval, irel) - struct alpha_relax_info *info; - bfd_vma symval; - Elf_Internal_Rela *irel; -{ - Elf_Internal_Rela *urel, *irelend = info->relend; - int flags, count, i; - bfd_signed_vma disp; - bfd_boolean fits16; - bfd_boolean fits32; - bfd_boolean lit_reused = FALSE; - bfd_boolean all_optimized = TRUE; - unsigned int lit_insn; - - lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); - if (lit_insn >> 26 != OP_LDQ) - { - ((*_bfd_error_handler) - ("%B: %A+0x%lx: warning: LITERAL relocation against unexpected insn", - info->abfd, info->sec, - (unsigned long) irel->r_offset)); - return TRUE; - } - - /* Can't relax dynamic symbols. */ - if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) - return TRUE; - - /* Summarize how this particular LITERAL is used. */ - for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count) - { - if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE) - break; - if (urel->r_addend <= 3) - flags |= 1 << urel->r_addend; - } - - /* A little preparation for the loop... */ - disp = symval - info->gp; - - for (urel = irel+1, i = 0; i < count; ++i, ++urel) - { - unsigned int insn; - int insn_disp; - bfd_signed_vma xdisp; - - insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset); - - switch (urel->r_addend) - { - case LITUSE_ALPHA_ADDR: - default: - /* This type is really just a placeholder to note that all - uses cannot be optimized, but to still allow some. */ - all_optimized = FALSE; - break; - - case LITUSE_ALPHA_BASE: - /* We can always optimize 16-bit displacements. */ - - /* Extract the displacement from the instruction, sign-extending - it if necessary, then test whether it is within 16 or 32 bits - displacement from GP. */ - insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000; - - xdisp = disp + insn_disp; - fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000); - fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 - && xdisp < 0x7fff8000); - - if (fits16) - { - /* Take the op code and dest from this insn, take the base - register from the literal insn. Leave the offset alone. */ - insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000); - urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), - R_ALPHA_GPREL16); - urel->r_addend = irel->r_addend; - info->changed_relocs = TRUE; - - bfd_put_32 (info->abfd, (bfd_vma) insn, - info->contents + urel->r_offset); - info->changed_contents = TRUE; - } - - /* If all mem+byte, we can optimize 32-bit mem displacements. */ - else if (fits32 && !(flags & ~6)) - { - /* FIXME: sanity check that lit insn Ra is mem insn Rb. */ - - irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), - R_ALPHA_GPRELHIGH); - lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000); - bfd_put_32 (info->abfd, (bfd_vma) lit_insn, - info->contents + irel->r_offset); - lit_reused = TRUE; - info->changed_contents = TRUE; - - urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), - R_ALPHA_GPRELLOW); - urel->r_addend = irel->r_addend; - info->changed_relocs = TRUE; - } - else - all_optimized = FALSE; - break; - - case LITUSE_ALPHA_BYTOFF: - /* We can always optimize byte instructions. */ - - /* FIXME: sanity check the insn for byte op. Check that the - literal dest reg is indeed Rb in the byte insn. */ - - insn &= ~ (unsigned) 0x001ff000; - insn |= ((symval & 7) << 13) | 0x1000; - - urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - urel->r_addend = 0; - info->changed_relocs = TRUE; - - bfd_put_32 (info->abfd, (bfd_vma) insn, - info->contents + urel->r_offset); - info->changed_contents = TRUE; - break; - - case LITUSE_ALPHA_JSR: - case LITUSE_ALPHA_TLSGD: - case LITUSE_ALPHA_TLSLDM: - { - bfd_vma optdest, org; - bfd_signed_vma odisp; - - /* For undefined weak symbols, we're mostly interested in getting - rid of the got entry whenever possible, so optimize this to a - use of the zero register. */ - if (info->h && info->h->root.root.type == bfd_link_hash_undefweak) - { - insn |= 31 << 16; - bfd_put_32 (info->abfd, (bfd_vma) insn, - info->contents + urel->r_offset); - - info->changed_contents = TRUE; - break; - } - - /* If not zero, place to jump without needing pv. */ - optdest = elf64_alpha_relax_opt_call (info, symval); - org = (info->sec->output_section->vma - + info->sec->output_offset - + urel->r_offset + 4); - odisp = (optdest ? optdest : symval) - org; - - if (odisp >= -0x400000 && odisp < 0x400000) - { - Elf_Internal_Rela *xrel; - - /* Preserve branch prediction call stack when possible. */ - if ((insn & INSN_JSR_MASK) == INSN_JSR) - insn = (OP_BSR << 26) | (insn & 0x03e00000); - else - insn = (OP_BR << 26) | (insn & 0x03e00000); - - urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), - R_ALPHA_BRADDR); - urel->r_addend = irel->r_addend; - - if (optdest) - urel->r_addend += optdest - symval; - else - all_optimized = FALSE; - - bfd_put_32 (info->abfd, (bfd_vma) insn, - info->contents + urel->r_offset); - - /* Kill any HINT reloc that might exist for this insn. */ - xrel = (elf64_alpha_find_reloc_at_ofs - (info->relocs, info->relend, urel->r_offset, - R_ALPHA_HINT)); - if (xrel) - xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - - info->changed_contents = TRUE; - info->changed_relocs = TRUE; - } - else - all_optimized = FALSE; - - /* Even if the target is not in range for a direct branch, - if we share a GP, we can eliminate the gp reload. */ - if (optdest) - { - Elf_Internal_Rela *gpdisp - = (elf64_alpha_find_reloc_at_ofs - (info->relocs, irelend, urel->r_offset + 4, - R_ALPHA_GPDISP)); - if (gpdisp) - { - bfd_byte *p_ldah = info->contents + gpdisp->r_offset; - bfd_byte *p_lda = p_ldah + gpdisp->r_addend; - unsigned int ldah = bfd_get_32 (info->abfd, p_ldah); - unsigned int lda = bfd_get_32 (info->abfd, p_lda); - - /* Verify that the instruction is "ldah $29,0($26)". - Consider a function that ends in a noreturn call, - and that the next function begins with an ldgp, - and that by accident there is no padding between. - In that case the insn would use $27 as the base. */ - if (ldah == 0x27ba0000 && lda == 0x23bd0000) - { - bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah); - bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda); - - gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - info->changed_contents = TRUE; - info->changed_relocs = TRUE; - } - } - } - } - break; - } - } - - /* If all cases were optimized, we can reduce the use count on this - got entry by one, possibly eliminating it. */ - if (all_optimized) - { - if (--info->gotent->use_count == 0) - { - int sz = alpha_got_entry_size (R_ALPHA_LITERAL); - alpha_elf_tdata (info->gotobj)->total_got_size -= sz; - if (!info->h) - alpha_elf_tdata (info->gotobj)->local_got_size -= sz; - } - - /* If the literal instruction is no longer needed (it may have been - reused. We can eliminate it. */ - /* ??? For now, I don't want to deal with compacting the section, - so just nop it out. */ - if (!lit_reused) - { - irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - info->changed_relocs = TRUE; - - bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, - info->contents + irel->r_offset); - info->changed_contents = TRUE; - } - - return TRUE; - } - else - return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL); -} - -static bfd_vma -elf64_alpha_relax_opt_call (info, symval) - struct alpha_relax_info *info; - bfd_vma symval; -{ - /* If the function has the same gp, and we can identify that the - function does not use its function pointer, we can eliminate the - address load. */ - - /* If the symbol is marked NOPV, we are being told the function never - needs its procedure value. */ - if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV) - return symval; - - /* If the symbol is marked STD_GP, we are being told the function does - a normal ldgp in the first two words. */ - else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD) - ; - - /* Otherwise, we may be able to identify a GP load in the first two - words, which we can then skip. */ - else - { - Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp; - bfd_vma ofs; - - /* Load the relocations from the section that the target symbol is in. */ - if (info->sec == info->tsec) - { - tsec_relocs = info->relocs; - tsec_relend = info->relend; - tsec_free = NULL; - } - else - { - tsec_relocs = (_bfd_elf_link_read_relocs - (info->abfd, info->tsec, (PTR) NULL, - (Elf_Internal_Rela *) NULL, - info->link_info->keep_memory)); - if (tsec_relocs == NULL) - return 0; - tsec_relend = tsec_relocs + info->tsec->reloc_count; - tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs); - } - - /* Recover the symbol's offset within the section. */ - ofs = (symval - info->tsec->output_section->vma - - info->tsec->output_offset); - - /* Look for a GPDISP reloc. */ - gpdisp = (elf64_alpha_find_reloc_at_ofs - (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP)); - - if (!gpdisp || gpdisp->r_addend != 4) - { - if (tsec_free) - free (tsec_free); - return 0; - } - if (tsec_free) - free (tsec_free); - } - - /* We've now determined that we can skip an initial gp load. Verify - that the call and the target use the same gp. */ - if (info->link_info->hash->creator != info->tsec->owner->xvec - || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj) - return 0; - - return symval + 8; -} - -static bfd_boolean -elf64_alpha_relax_got_load (info, symval, irel, r_type) - struct alpha_relax_info *info; - bfd_vma symval; - Elf_Internal_Rela *irel; - unsigned long r_type; -{ - unsigned int insn; - bfd_signed_vma disp; - - /* Get the instruction. */ - insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); - - if (insn >> 26 != OP_LDQ) - { - reloc_howto_type *howto = elf64_alpha_howto_table + r_type; - ((*_bfd_error_handler) - ("%B: %A+0x%lx: warning: %s relocation against unexpected insn", - info->abfd, info->sec, - (unsigned long) irel->r_offset, howto->name)); - return TRUE; - } - - /* Can't relax dynamic symbols. */ - if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) - return TRUE; - - /* Can't use local-exec relocations in shared libraries. */ - if (r_type == R_ALPHA_GOTTPREL && info->link_info->shared) - return TRUE; - - if (r_type == R_ALPHA_LITERAL) - { - /* Look for nice constant addresses. This includes the not-uncommon - special case of 0 for undefweak symbols. */ - if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak) - || (!info->link_info->shared - && (symval >= (bfd_vma)-0x8000 || symval < 0x8000))) - { - disp = 0; - insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); - insn |= (symval & 0xffff); - r_type = R_ALPHA_NONE; - } - else - { - disp = symval - info->gp; - insn = (OP_LDA << 26) | (insn & 0x03ff0000); - r_type = R_ALPHA_GPREL16; - } - } - else - { - bfd_vma dtp_base, tp_base; - - BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); - dtp_base = alpha_get_dtprel_base (info->link_info); - tp_base = alpha_get_tprel_base (info->link_info); - disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base); - - insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); - - switch (r_type) - { - case R_ALPHA_GOTDTPREL: - r_type = R_ALPHA_DTPREL16; - break; - case R_ALPHA_GOTTPREL: - r_type = R_ALPHA_TPREL16; - break; - default: - BFD_ASSERT (0); - return FALSE; - } - } - - if (disp < -0x8000 || disp >= 0x8000) - return TRUE; - - bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset); - info->changed_contents = TRUE; - - /* Reduce the use count on this got entry by one, possibly - eliminating it. */ - if (--info->gotent->use_count == 0) - { - int sz = alpha_got_entry_size (r_type); - alpha_elf_tdata (info->gotobj)->total_got_size -= sz; - if (!info->h) - alpha_elf_tdata (info->gotobj)->local_got_size -= sz; - } - - /* Smash the existing GOT relocation for its 16-bit immediate pair. */ - irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type); - info->changed_relocs = TRUE; - - /* ??? Search forward through this basic block looking for insns - that use the target register. Stop after an insn modifying the - register is seen, or after a branch or call. - - Any such memory load insn may be substituted by a load directly - off the GP. This allows the memory load insn to be issued before - the calculated GP register would otherwise be ready. - - Any such jsr insn can be replaced by a bsr if it is in range. - - This would mean that we'd have to _add_ relocations, the pain of - which gives one pause. */ - - return TRUE; -} - -static bfd_boolean -elf64_alpha_relax_gprelhilo (info, symval, irel, hi) - struct alpha_relax_info *info; - bfd_vma symval; - Elf_Internal_Rela *irel; - bfd_boolean hi; -{ - unsigned int insn; - bfd_signed_vma disp; - bfd_byte *pos = info->contents + irel->r_offset; - - /* ??? This assumes that the compiler doesn't render - - array[i] - as - ldah t, array(gp) !gprelhigh - s8addl i, t, t - ldq r, array(t) !gprellow - - which would indeed be the most efficient way to implement this. */ - - return TRUE; - - disp = symval - info->gp; - if (disp < -0x8000 || disp >= 0x8000) - return TRUE; - - if (hi) - { - /* Nop out the high instruction. */ - - bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos); - info->changed_contents = TRUE; - - irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - irel->r_addend = 0; - info->changed_relocs = TRUE; - } - else - { - /* Adjust the low instruction to reference GP directly. */ - - insn = bfd_get_32 (info->abfd, pos); - insn = (insn & 0xffe00000) | (29 << 16); - bfd_put_32 (info->abfd, (bfd_vma) insn, pos); - info->changed_contents = TRUE; - - irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), - R_ALPHA_GPREL16); - info->changed_relocs = TRUE; - } - - return TRUE; -} - -static bfd_boolean -elf64_alpha_relax_tls_get_addr (info, symval, irel, is_gd) - struct alpha_relax_info *info; - bfd_vma symval; - Elf_Internal_Rela *irel; - bfd_boolean is_gd; -{ - bfd_byte *pos[5]; - unsigned int insn; - Elf_Internal_Rela *gpdisp, *hint; - bfd_boolean dynamic, use_gottprel, pos1_unusable; - unsigned long new_symndx; - - dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info); - - /* If a TLS symbol is accessed using IE at least once, there is no point - to use dynamic model for it. */ - if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE)) - ; - - /* If the symbol is local, and we've already committed to DF_STATIC_TLS, - then we might as well relax to IE. */ - else if (info->link_info->shared && !dynamic - && (info->link_info->flags & DF_STATIC_TLS)) - ; - - /* Otherwise we must be building an executable to do anything. */ - else if (info->link_info->shared) - return TRUE; - - /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and - the matching LITUSE_TLS relocations. */ - if (irel + 2 >= info->relend) - return TRUE; - if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL - || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE - || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM)) - return TRUE; - - /* There must be a GPDISP relocation positioned immediately after the - LITUSE relocation. */ - gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, - irel[2].r_offset + 4, R_ALPHA_GPDISP); - if (!gpdisp) - return TRUE; - - pos[0] = info->contents + irel[0].r_offset; - pos[1] = info->contents + irel[1].r_offset; - pos[2] = info->contents + irel[2].r_offset; - pos[3] = info->contents + gpdisp->r_offset; - pos[4] = pos[3] + gpdisp->r_addend; - pos1_unusable = FALSE; - - /* Generally, the positions are not allowed to be out of order, lest the - modified insn sequence have different register lifetimes. We can make - an exception when pos 1 is adjacent to pos 0. */ - if (pos[1] + 4 == pos[0]) - { - bfd_byte *tmp = pos[0]; - pos[0] = pos[1]; - pos[1] = tmp; - } - else if (pos[1] < pos[0]) - pos1_unusable = TRUE; - if (pos[1] >= pos[2] || pos[2] >= pos[3]) - return TRUE; - - /* Reduce the use count on the LITERAL relocation. Do this before we - smash the symndx when we adjust the relocations below. */ - { - struct alpha_elf_got_entry *lit_gotent; - struct alpha_elf_link_hash_entry *lit_h; - unsigned long indx; - - BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info); - indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info; - lit_h = alpha_elf_sym_hashes (info->abfd)[indx]; - - while (lit_h->root.root.type == bfd_link_hash_indirect - || lit_h->root.root.type == bfd_link_hash_warning) - lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link; - - for (lit_gotent = lit_h->got_entries; lit_gotent ; - lit_gotent = lit_gotent->next) - if (lit_gotent->gotobj == info->gotobj - && lit_gotent->reloc_type == R_ALPHA_LITERAL - && lit_gotent->addend == irel[1].r_addend) - break; - BFD_ASSERT (lit_gotent); - - if (--lit_gotent->use_count == 0) - { - int sz = alpha_got_entry_size (R_ALPHA_LITERAL); - alpha_elf_tdata (info->gotobj)->total_got_size -= sz; - } - } - - /* Change - - lda $16,x($gp) !tlsgd!1 - ldq $27,__tls_get_addr($gp) !literal!1 - jsr $26,($27)__tls_get_addr !lituse_tlsgd!1 - ldah $29,0($26) !gpdisp!2 - lda $29,0($29) !gpdisp!2 - to - ldq $16,x($gp) !gottprel - unop - call_pal rduniq - addq $16,$0,$0 - unop - or the first pair to - lda $16,x($gp) !tprel - unop - or - ldah $16,x($gp) !tprelhi - lda $16,x($16) !tprello - - as appropriate. */ - - use_gottprel = FALSE; - new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : 0; - switch (!dynamic && !info->link_info->shared) - { - case 1: - { - bfd_vma tp_base; - bfd_signed_vma disp; - - BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); - tp_base = alpha_get_tprel_base (info->link_info); - disp = symval - tp_base; - - if (disp >= -0x8000 && disp < 0x8000) - { - insn = (OP_LDA << 26) | (16 << 21) | (31 << 16); - bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); - bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); - - irel[0].r_offset = pos[0] - info->contents; - irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16); - irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - break; - } - else if (disp >= -(bfd_signed_vma) 0x80000000 - && disp < (bfd_signed_vma) 0x7fff8000 - && !pos1_unusable) - { - insn = (OP_LDAH << 26) | (16 << 21) | (31 << 16); - bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); - insn = (OP_LDA << 26) | (16 << 21) | (16 << 16); - bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]); - - irel[0].r_offset = pos[0] - info->contents; - irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI); - irel[1].r_offset = pos[1] - info->contents; - irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO); - break; - } - } - /* FALLTHRU */ - - default: - use_gottprel = TRUE; - - insn = (OP_LDQ << 26) | (16 << 21) | (29 << 16); - bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); - bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); - - irel[0].r_offset = pos[0] - info->contents; - irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL); - irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - break; - } - - bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]); - - insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0); - bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]); - - bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]); - - irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - - hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, - irel[2].r_offset, R_ALPHA_HINT); - if (hint) - hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - - info->changed_contents = TRUE; - info->changed_relocs = TRUE; - - /* Reduce the use count on the TLSGD/TLSLDM relocation. */ - if (--info->gotent->use_count == 0) - { - int sz = alpha_got_entry_size (info->gotent->reloc_type); - alpha_elf_tdata (info->gotobj)->total_got_size -= sz; - if (!info->h) - alpha_elf_tdata (info->gotobj)->local_got_size -= sz; - } - - /* If we've switched to a GOTTPREL relocation, increment the reference - count on that got entry. */ - if (use_gottprel) - { - struct alpha_elf_got_entry *tprel_gotent; - - for (tprel_gotent = *info->first_gotent; tprel_gotent ; - tprel_gotent = tprel_gotent->next) - if (tprel_gotent->gotobj == info->gotobj - && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL - && tprel_gotent->addend == irel->r_addend) - break; - if (tprel_gotent) - tprel_gotent->use_count++; - else - { - if (info->gotent->use_count == 0) - tprel_gotent = info->gotent; - else - { - tprel_gotent = (struct alpha_elf_got_entry *) - bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry)); - if (!tprel_gotent) - return FALSE; - - tprel_gotent->next = *info->first_gotent; - *info->first_gotent = tprel_gotent; - - tprel_gotent->gotobj = info->gotobj; - tprel_gotent->addend = irel->r_addend; - tprel_gotent->got_offset = -1; - tprel_gotent->reloc_done = 0; - tprel_gotent->reloc_xlated = 0; - } - - tprel_gotent->use_count = 1; - tprel_gotent->reloc_type = R_ALPHA_GOTTPREL; - } - } - - return TRUE; -} - -static bfd_boolean -elf64_alpha_relax_section (abfd, sec, link_info, again) - bfd *abfd; - asection *sec; - struct bfd_link_info *link_info; - bfd_boolean *again; -{ - Elf_Internal_Shdr *symtab_hdr; - Elf_Internal_Rela *internal_relocs; - Elf_Internal_Rela *irel, *irelend; - Elf_Internal_Sym *isymbuf = NULL; - struct alpha_elf_got_entry **local_got_entries; - struct alpha_relax_info info; - - /* We are not currently changing any sizes, so only one pass. */ - *again = FALSE; - - if (link_info->relocatable - || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC)) - != (SEC_CODE | SEC_RELOC | SEC_ALLOC)) - || sec->reloc_count == 0) - return TRUE; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; - - /* Load the relocations for this section. */ - internal_relocs = (_bfd_elf_link_read_relocs - (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, - link_info->keep_memory)); - if (internal_relocs == NULL) - return FALSE; - - memset(&info, 0, sizeof (info)); - info.abfd = abfd; - info.sec = sec; - info.link_info = link_info; - info.symtab_hdr = symtab_hdr; - info.relocs = internal_relocs; - info.relend = irelend = internal_relocs + sec->reloc_count; - - /* Find the GP for this object. Do not store the result back via - _bfd_set_gp_value, since this could change again before final. */ - info.gotobj = alpha_elf_tdata (abfd)->gotobj; - if (info.gotobj) - { - asection *sgot = alpha_elf_tdata (info.gotobj)->got; - info.gp = (sgot->output_section->vma - + sgot->output_offset - + 0x8000); - } - - /* Get the section contents. */ - if (elf_section_data (sec)->this_hdr.contents != NULL) - info.contents = elf_section_data (sec)->this_hdr.contents; - else - { - if (!bfd_malloc_and_get_section (abfd, sec, &info.contents)) - goto error_return; - } - - for (irel = internal_relocs; irel < irelend; irel++) - { - bfd_vma symval; - struct alpha_elf_got_entry *gotent; - unsigned long r_type = ELF64_R_TYPE (irel->r_info); - unsigned long r_symndx = ELF64_R_SYM (irel->r_info); - - /* Early exit for unhandled or unrelaxable relocations. */ - switch (r_type) - { - case R_ALPHA_LITERAL: - case R_ALPHA_GPRELHIGH: - case R_ALPHA_GPRELLOW: - case R_ALPHA_GOTDTPREL: - case R_ALPHA_GOTTPREL: - case R_ALPHA_TLSGD: - break; - - case R_ALPHA_TLSLDM: - /* The symbol for a TLSLDM reloc is ignored. Collapse the - reloc to the 0 symbol so that they all match. */ - r_symndx = 0; - break; - - default: - continue; - } - - /* Get the value of the symbol referred to by the reloc. */ - if (r_symndx < symtab_hdr->sh_info) - { - /* A local symbol. */ - Elf_Internal_Sym *isym; - - /* Read this BFD's local symbols. */ - if (isymbuf == NULL) - { - isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; - if (isymbuf == NULL) - isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, - symtab_hdr->sh_info, 0, - NULL, NULL, NULL); - if (isymbuf == NULL) - goto error_return; - } - - isym = isymbuf + r_symndx; - - /* Given the symbol for a TLSLDM reloc is ignored, this also - means forcing the symbol value to the tp base. */ - if (r_type == R_ALPHA_TLSLDM) - { - info.tsec = bfd_abs_section_ptr; - symval = alpha_get_tprel_base (info.link_info); - } - else - { - symval = isym->st_value; - if (isym->st_shndx == SHN_UNDEF) - continue; - else if (isym->st_shndx == SHN_ABS) - info.tsec = bfd_abs_section_ptr; - else if (isym->st_shndx == SHN_COMMON) - info.tsec = bfd_com_section_ptr; - else - info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); - } - - info.h = NULL; - info.other = isym->st_other; - if (local_got_entries) - info.first_gotent = &local_got_entries[r_symndx]; - else - { - info.first_gotent = &info.gotent; - info.gotent = NULL; - } - } - else - { - unsigned long indx; - struct alpha_elf_link_hash_entry *h; - - indx = r_symndx - symtab_hdr->sh_info; - h = alpha_elf_sym_hashes (abfd)[indx]; - BFD_ASSERT (h != NULL); - - while (h->root.root.type == bfd_link_hash_indirect - || h->root.root.type == bfd_link_hash_warning) - h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; - - /* If the symbol is undefined, we can't do anything with it. */ - if (h->root.root.type == bfd_link_hash_undefined) - continue; - - /* If the symbol isn't defined in the current module, - again we can't do anything. */ - if (h->root.root.type == bfd_link_hash_undefweak) - { - info.tsec = bfd_abs_section_ptr; - symval = 0; - } - else if (!h->root.def_regular) - { - /* Except for TLSGD relocs, which can sometimes be - relaxed to GOTTPREL relocs. */ - if (r_type != R_ALPHA_TLSGD) - continue; - info.tsec = bfd_abs_section_ptr; - symval = 0; - } - else - { - info.tsec = h->root.root.u.def.section; - symval = h->root.root.u.def.value; - } - - info.h = h; - info.other = h->root.other; - info.first_gotent = &h->got_entries; - } - - /* Search for the got entry to be used by this relocation. */ - for (gotent = *info.first_gotent; gotent ; gotent = gotent->next) - if (gotent->gotobj == info.gotobj - && gotent->reloc_type == r_type - && gotent->addend == irel->r_addend) - break; - info.gotent = gotent; - - symval += info.tsec->output_section->vma + info.tsec->output_offset; - symval += irel->r_addend; - - switch (r_type) - { - case R_ALPHA_LITERAL: - BFD_ASSERT(info.gotent != NULL); - - /* If there exist LITUSE relocations immediately following, this - opens up all sorts of interesting optimizations, because we - now know every location that this address load is used. */ - if (irel+1 < irelend - && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE) - { - if (!elf64_alpha_relax_with_lituse (&info, symval, irel)) - goto error_return; - } - else - { - if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) - goto error_return; - } - break; - - case R_ALPHA_GPRELHIGH: - case R_ALPHA_GPRELLOW: - if (!elf64_alpha_relax_gprelhilo (&info, symval, irel, - r_type == R_ALPHA_GPRELHIGH)) - goto error_return; - break; - - case R_ALPHA_GOTDTPREL: - case R_ALPHA_GOTTPREL: - BFD_ASSERT(info.gotent != NULL); - if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) - goto error_return; - break; - - case R_ALPHA_TLSGD: - case R_ALPHA_TLSLDM: - BFD_ASSERT(info.gotent != NULL); - if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel, - r_type == R_ALPHA_TLSGD)) - goto error_return; - break; - } - } - - if (!elf64_alpha_size_plt_section (link_info)) - return FALSE; - if (!elf64_alpha_size_got_sections (link_info)) - return FALSE; - if (!elf64_alpha_size_rela_got_section (link_info)) - return FALSE; - - if (isymbuf != NULL - && symtab_hdr->contents != (unsigned char *) isymbuf) - { - if (!link_info->keep_memory) - free (isymbuf); - else - { - /* Cache the symbols for elf_link_input_bfd. */ - symtab_hdr->contents = (unsigned char *) isymbuf; - } - } - - if (info.contents != NULL - && elf_section_data (sec)->this_hdr.contents != info.contents) - { - if (!info.changed_contents && !link_info->keep_memory) - free (info.contents); - else - { - /* Cache the section contents for elf_link_input_bfd. */ - elf_section_data (sec)->this_hdr.contents = info.contents; - } - } - - if (elf_section_data (sec)->relocs != internal_relocs) - { - if (!info.changed_relocs) - free (internal_relocs); - else - elf_section_data (sec)->relocs = internal_relocs; - } - - *again = info.changed_contents || info.changed_relocs; - - return TRUE; - - error_return: - if (isymbuf != NULL - && symtab_hdr->contents != (unsigned char *) isymbuf) - free (isymbuf); - if (info.contents != NULL - && elf_section_data (sec)->this_hdr.contents != info.contents) - free (info.contents); - if (internal_relocs != NULL - && elf_section_data (sec)->relocs != internal_relocs) - free (internal_relocs); - return FALSE; -} - /* PLT/GOT Stuff */ #define PLT_HEADER_SIZE 32 #define PLT_HEADER_WORD1 (bfd_vma) 0xc3600000 /* br $27,.+4 */ @@ -2333,9 +1088,7 @@ elf64_alpha_section_from_shdr (bfd *abfd, /* Convert Alpha specific section flags to bfd internal section flags. */ static bfd_boolean -elf64_alpha_section_flags (flags, hdr) - flagword *flags; - const Elf_Internal_Shdr *hdr; +elf64_alpha_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) { if (hdr->sh_flags & SHF_ALPHA_GPREL) *flags |= SEC_SMALL_DATA; @@ -2347,10 +1100,7 @@ elf64_alpha_section_flags (flags, hdr) section name, which is a hack, but ought to work. */ static bfd_boolean -elf64_alpha_fake_sections (abfd, hdr, sec) - bfd *abfd; - Elf_Internal_Shdr *hdr; - asection *sec; +elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec) { register const char *name; @@ -2380,14 +1130,11 @@ elf64_alpha_fake_sections (abfd, hdr, sec) file. We use it to put .comm items in .sbss, and not .bss. */ static bfd_boolean -elf64_alpha_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) - bfd *abfd; - struct bfd_link_info *info; - Elf_Internal_Sym *sym; - const char **namep ATTRIBUTE_UNUSED; - flagword *flagsp ATTRIBUTE_UNUSED; - asection **secp; - bfd_vma *valp; +elf64_alpha_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, + Elf_Internal_Sym *sym, + const char **namep ATTRIBUTE_UNUSED, + flagword *flagsp ATTRIBUTE_UNUSED, + asection **secp, bfd_vma *valp) { if (sym->st_shndx == SHN_COMMON && !info->relocatable @@ -2418,9 +1165,8 @@ elf64_alpha_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) /* Create the .got section. */ static bfd_boolean -elf64_alpha_create_got_section(abfd, info) - bfd *abfd; - struct bfd_link_info *info ATTRIBUTE_UNUSED; +elf64_alpha_create_got_section (bfd *abfd, + struct bfd_link_info *info ATTRIBUTE_UNUSED) { asection *s; @@ -2448,9 +1194,7 @@ elf64_alpha_create_got_section(abfd, info) /* Create all the dynamic sections. */ static bfd_boolean -elf64_alpha_create_dynamic_sections (abfd, info) - bfd *abfd; - struct bfd_link_info *info; +elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) { asection *s; struct elf_link_hash_entry *h; @@ -2537,10 +1281,8 @@ elf64_alpha_create_dynamic_sections (abfd, info) ecoff_debug_info structure. */ static bfd_boolean -elf64_alpha_read_ecoff_info (abfd, section, debug) - bfd *abfd; - asection *section; - struct ecoff_debug_info *debug; +elf64_alpha_read_ecoff_info (bfd *abfd, asection *section, + struct ecoff_debug_info *debug) { HDRR *symhdr; const struct ecoff_debug_swap *swap; @@ -2625,9 +1367,7 @@ elf64_alpha_read_ecoff_info (abfd, section, debug) /* Alpha ELF local labels start with '$'. */ static bfd_boolean -elf64_alpha_is_local_label_name (abfd, name) - bfd *abfd ATTRIBUTE_UNUSED; - const char *name; +elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name) { return name[0] == '$'; } @@ -2644,15 +1384,10 @@ struct mips_elf_find_line }; static bfd_boolean -elf64_alpha_find_nearest_line (abfd, section, symbols, offset, filename_ptr, - functionname_ptr, line_ptr) - bfd *abfd; - asection *section; - asymbol **symbols; - bfd_vma offset; - const char **filename_ptr; - const char **functionname_ptr; - unsigned int *line_ptr; +elf64_alpha_find_nearest_line (bfd *abfd, asection *section, asymbol **symbols, + bfd_vma offset, const char **filename_ptr, + const char **functionname_ptr, + unsigned int *line_ptr) { asection *msec; @@ -2755,9 +1490,7 @@ struct extsym_info }; static bfd_boolean -elf64_alpha_output_extsym (h, data) - struct alpha_elf_link_hash_entry *h; - PTR data; +elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry *h, PTR data) { struct extsym_info *einfo = (struct extsym_info *) data; bfd_boolean strip; @@ -2892,11 +1625,9 @@ elf64_alpha_output_extsym (h, data) /* Search for and possibly create a got entry. */ static struct alpha_elf_got_entry * -get_got_entry (abfd, h, r_type, r_symndx, r_addend) - bfd *abfd; - struct alpha_elf_link_hash_entry *h; - unsigned long r_type, r_symndx; - bfd_vma r_addend; +get_got_entry (bfd *abfd, struct alpha_elf_link_hash_entry *h, + unsigned long r_type, unsigned long r_symndx, + bfd_vma r_addend) { struct alpha_elf_got_entry *gotent; struct alpha_elf_got_entry **slot; @@ -2971,11 +1702,8 @@ get_got_entry (abfd, h, r_type, r_symndx, r_addend) /* Handle dynamic relocations when doing an Alpha ELF link. */ static bfd_boolean -elf64_alpha_check_relocs (abfd, info, sec, relocs) - bfd *abfd; - struct bfd_link_info *info; - asection *sec; - const Elf_Internal_Rela *relocs; +elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs) { bfd *dynobj; asection *sreloc; @@ -3044,7 +1772,8 @@ elf64_alpha_check_relocs (abfd, info, sec, relocs) this may help reduce memory usage and processing time later. */ maybe_dynamic = FALSE; if (h && ((info->shared - && (!info->symbolic || info->unresolved_syms_in_shared_libs == RM_IGNORE)) + && (!info->symbolic + || info->unresolved_syms_in_shared_libs == RM_IGNORE)) || !h->root.def_regular || h->root.root.type == bfd_link_hash_defweak)) maybe_dynamic = TRUE; @@ -3250,9 +1979,8 @@ elf64_alpha_check_relocs (abfd, info, sec, relocs) understand. */ static bfd_boolean -elf64_alpha_adjust_dynamic_symbol (info, h) - struct bfd_link_info *info; - struct elf_link_hash_entry *h; +elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h) { bfd *dynobj; asection *s; @@ -3338,9 +2066,8 @@ elf64_alpha_adjust_dynamic_symbol (info, h) in these situations. */ static bfd_boolean -elf64_alpha_merge_ind_symbols (hi, dummy) - struct alpha_elf_link_hash_entry *hi; - PTR dummy ATTRIBUTE_UNUSED; +elf64_alpha_merge_ind_symbols (struct alpha_elf_link_hash_entry *hi, + PTR dummy ATTRIBUTE_UNUSED) { struct alpha_elf_link_hash_entry *hs; @@ -3414,8 +2141,7 @@ elf64_alpha_merge_ind_symbols (hi, dummy) /* Is it possible to merge two object file's .got tables? */ static bfd_boolean -elf64_alpha_can_merge_gots (a, b) - bfd *a, *b; +elf64_alpha_can_merge_gots (bfd *a, bfd *b) { int total = alpha_elf_tdata (a)->total_got_size; bfd *bsub; @@ -3475,8 +2201,7 @@ elf64_alpha_can_merge_gots (a, b) /* Actually merge two .got tables. */ static void -elf64_alpha_merge_gots (a, b) - bfd *a, *b; +elf64_alpha_merge_gots (bfd *a, bfd *b) { int total = alpha_elf_tdata (a)->total_got_size; bfd *bsub; @@ -3574,9 +2299,8 @@ elf64_alpha_merge_gots (a, b) /* Calculate the offsets for the got entries. */ static bfd_boolean -elf64_alpha_calc_got_offsets_for_symbol (h, arg) - struct alpha_elf_link_hash_entry *h; - PTR arg ATTRIBUTE_UNUSED; +elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h, + PTR arg ATTRIBUTE_UNUSED) { bfd_boolean result = TRUE; struct alpha_elf_got_entry *gotent; @@ -3607,8 +2331,7 @@ elf64_alpha_calc_got_offsets_for_symbol (h, arg) } static void -elf64_alpha_calc_got_offsets (info) - struct bfd_link_info *info; +elf64_alpha_calc_got_offsets (struct bfd_link_info *info) { bfd *i, *got_list = alpha_elf_hash_table(info)->got_list; @@ -3653,8 +2376,7 @@ elf64_alpha_calc_got_offsets (info) /* Constructs the gots. */ static bfd_boolean -elf64_alpha_size_got_sections (info) - struct bfd_link_info *info; +elf64_alpha_size_got_sections (struct bfd_link_info *info) { bfd *i, *got_list, *cur_got_obj = NULL; int something_changed = 0; @@ -3729,42 +2451,8 @@ elf64_alpha_size_got_sections (info) return TRUE; } -/* Called from relax_section to rebuild the PLT in light of - potential changes in the function's status. */ - static bfd_boolean -elf64_alpha_size_plt_section (info) - struct bfd_link_info *info; -{ - asection *splt, *spltrel; - unsigned long entries; - bfd *dynobj; - - dynobj = elf_hash_table(info)->dynobj; - splt = bfd_get_section_by_name(dynobj, ".plt"); - if (splt == NULL) - return TRUE; - - splt->size = 0; - - alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), - elf64_alpha_size_plt_section_1, splt); - - /* Every plt entry requires a JMP_SLOT relocation. */ - spltrel = bfd_get_section_by_name (dynobj, ".rela.plt"); - if (splt->size) - entries = (splt->size - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; - else - entries = 0; - spltrel->size = entries * sizeof (Elf64_External_Rela); - - return TRUE; -} - -static bfd_boolean -elf64_alpha_size_plt_section_1 (h, data) - struct alpha_elf_link_hash_entry *h; - PTR data; +elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h, PTR data) { asection *splt = (asection *) data; struct alpha_elf_got_entry *gotent; @@ -3805,10 +2493,40 @@ elf64_alpha_size_plt_section_1 (h, data) return TRUE; } +/* Called from relax_section to rebuild the PLT in light of + potential changes in the function's status. */ + static bfd_boolean -elf64_alpha_always_size_sections (output_bfd, info) - bfd *output_bfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info; +elf64_alpha_size_plt_section (struct bfd_link_info *info) +{ + asection *splt, *spltrel; + unsigned long entries; + bfd *dynobj; + + dynobj = elf_hash_table(info)->dynobj; + splt = bfd_get_section_by_name(dynobj, ".plt"); + if (splt == NULL) + return TRUE; + + splt->size = 0; + + alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), + elf64_alpha_size_plt_section_1, splt); + + /* Every plt entry requires a JMP_SLOT relocation. */ + spltrel = bfd_get_section_by_name (dynobj, ".rela.plt"); + if (splt->size) + entries = (splt->size - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; + else + entries = 0; + spltrel->size = entries * sizeof (Elf64_External_Rela); + + return TRUE; +} + +static bfd_boolean +elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) { bfd *i; @@ -3842,8 +2560,7 @@ elf64_alpha_always_size_sections (output_bfd, info) /* The number of dynamic relocations required by a static relocation. */ static int -alpha_dynamic_entries_for_reloc (r_type, dynamic, shared) - int r_type, dynamic, shared; +alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared) { switch (r_type) { @@ -3874,9 +2591,8 @@ alpha_dynamic_entries_for_reloc (r_type, dynamic, shared) /* Work out the sizes of the dynamic relocation entries. */ static bfd_boolean -elf64_alpha_calc_dynrel_sizes (h, info) - struct alpha_elf_link_hash_entry *h; - struct bfd_link_info *info; +elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry *h, + struct bfd_link_info *info) { bfd_boolean dynamic; struct alpha_elf_reloc_entry *relent; @@ -3927,11 +2643,57 @@ elf64_alpha_calc_dynrel_sizes (h, info) return TRUE; } +/* Subroutine of elf64_alpha_size_rela_got_section for doing the + global symbols. */ + +static bfd_boolean +elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry *h, + struct bfd_link_info *info) +{ + bfd_boolean dynamic; + struct alpha_elf_got_entry *gotent; + unsigned long entries; + + if (h->root.root.type == bfd_link_hash_warning) + h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; + + /* If the symbol is dynamic, we'll need all the relocations in their + natural form. If this is a shared object, and it has been forced + local, we'll need the same number of RELATIVE relocations. */ + dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); + + /* If the symbol is a hidden undefined weak, then we never have any + relocations. Avoid the loop which may want to add RELATIVE relocs + based on info->shared. */ + if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) + return TRUE; + + entries = 0; + for (gotent = h->got_entries; gotent ; gotent = gotent->next) + if (gotent->use_count > 0) + entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type, + dynamic, info->shared); + + /* If we are using a .plt entry, subtract one, as the first + reference uses a .rela.plt entry instead. */ + if (h->root.plt.offset != MINUS_ONE) + entries--; + + if (entries > 0) + { + bfd *dynobj = elf_hash_table(info)->dynobj; + asection *srel = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (srel != NULL); + srel->size += sizeof (Elf64_External_Rela) * entries; + } + + return TRUE; +} + /* Set the sizes of the dynamic relocation sections. */ static bfd_boolean -elf64_alpha_size_rela_got_section (info) - struct bfd_link_info *info; +elf64_alpha_size_rela_got_section (struct bfd_link_info *info) { unsigned long entries; bfd *i, *dynobj; @@ -3980,60 +2742,11 @@ elf64_alpha_size_rela_got_section (info) return TRUE; } -/* Subroutine of elf64_alpha_size_rela_got_section for doing the - global symbols. */ - -static bfd_boolean -elf64_alpha_size_rela_got_1 (h, info) - struct alpha_elf_link_hash_entry *h; - struct bfd_link_info *info; -{ - bfd_boolean dynamic; - struct alpha_elf_got_entry *gotent; - unsigned long entries; - - if (h->root.root.type == bfd_link_hash_warning) - h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; - - /* If the symbol is dynamic, we'll need all the relocations in their - natural form. If this is a shared object, and it has been forced - local, we'll need the same number of RELATIVE relocations. */ - dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); - - /* If the symbol is a hidden undefined weak, then we never have any - relocations. Avoid the loop which may want to add RELATIVE relocs - based on info->shared. */ - if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) - return TRUE; - - entries = 0; - for (gotent = h->got_entries; gotent ; gotent = gotent->next) - if (gotent->use_count > 0) - entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type, - dynamic, info->shared); - - /* If we are using a .plt entry, subtract one, as the first - reference uses a .rela.plt entry instead. */ - if (h->root.plt.offset != MINUS_ONE) - entries--; - - if (entries > 0) - { - bfd *dynobj = elf_hash_table(info)->dynobj; - asection *srel = bfd_get_section_by_name (dynobj, ".rela.got"); - BFD_ASSERT (srel != NULL); - srel->size += sizeof (Elf64_External_Rela) * entries; - } - - return TRUE; -} - /* Set the sizes of the dynamic sections. */ static bfd_boolean -elf64_alpha_size_dynamic_sections (output_bfd, info) - bfd *output_bfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info; +elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) { bfd *dynobj; asection *s; @@ -4161,17 +2874,1031 @@ elf64_alpha_size_dynamic_sections (output_bfd, info) return TRUE; } + +/* These functions do relaxation for Alpha ELF. + + Currently I'm only handling what I can do with existing compiler + and assembler support, which means no instructions are removed, + though some may be nopped. At this time GCC does not emit enough + information to do all of the relaxing that is possible. It will + take some not small amount of work for that to happen. + + There are a couple of interesting papers that I once read on this + subject, that I cannot find references to at the moment, that + related to Alpha in particular. They are by David Wall, then of + DEC WRL. */ + +#define OP_LDA 0x08 +#define OP_LDAH 0x09 +#define INSN_JSR 0x68004000 +#define INSN_JSR_MASK 0xfc00c000 +#define OP_LDQ 0x29 +#define OP_BR 0x30 +#define OP_BSR 0x34 +#define INSN_UNOP 0x2ffe0000 +#define INSN_ADDQ 0x40000400 +#define INSN_RDUNIQ 0x0000009e + +struct alpha_relax_info +{ + bfd *abfd; + asection *sec; + bfd_byte *contents; + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Rela *relocs, *relend; + struct bfd_link_info *link_info; + bfd_vma gp; + bfd *gotobj; + asection *tsec; + struct alpha_elf_link_hash_entry *h; + struct alpha_elf_got_entry **first_gotent; + struct alpha_elf_got_entry *gotent; + bfd_boolean changed_contents; + bfd_boolean changed_relocs; + unsigned char other; +}; + +static Elf_Internal_Rela * +elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela *rel, + Elf_Internal_Rela *relend, + bfd_vma offset, int type) +{ + while (rel < relend) + { + if (rel->r_offset == offset + && ELF64_R_TYPE (rel->r_info) == (unsigned int) type) + return rel; + ++rel; + } + return NULL; +} + +static bfd_boolean +elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval, + Elf_Internal_Rela *irel, unsigned long r_type) +{ + unsigned int insn; + bfd_signed_vma disp; + + /* Get the instruction. */ + insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); + + if (insn >> 26 != OP_LDQ) + { + reloc_howto_type *howto = elf64_alpha_howto_table + r_type; + ((*_bfd_error_handler) + ("%B: %A+0x%lx: warning: %s relocation against unexpected insn", + info->abfd, info->sec, + (unsigned long) irel->r_offset, howto->name)); + return TRUE; + } + + /* Can't relax dynamic symbols. */ + if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) + return TRUE; + + /* Can't use local-exec relocations in shared libraries. */ + if (r_type == R_ALPHA_GOTTPREL && info->link_info->shared) + return TRUE; + + if (r_type == R_ALPHA_LITERAL) + { + /* Look for nice constant addresses. This includes the not-uncommon + special case of 0 for undefweak symbols. */ + if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak) + || (!info->link_info->shared + && (symval >= (bfd_vma)-0x8000 || symval < 0x8000))) + { + disp = 0; + insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); + insn |= (symval & 0xffff); + r_type = R_ALPHA_NONE; + } + else + { + disp = symval - info->gp; + insn = (OP_LDA << 26) | (insn & 0x03ff0000); + r_type = R_ALPHA_GPREL16; + } + } + else + { + bfd_vma dtp_base, tp_base; + + BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); + dtp_base = alpha_get_dtprel_base (info->link_info); + tp_base = alpha_get_tprel_base (info->link_info); + disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base); + + insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); + + switch (r_type) + { + case R_ALPHA_GOTDTPREL: + r_type = R_ALPHA_DTPREL16; + break; + case R_ALPHA_GOTTPREL: + r_type = R_ALPHA_TPREL16; + break; + default: + BFD_ASSERT (0); + return FALSE; + } + } + + if (disp < -0x8000 || disp >= 0x8000) + return TRUE; + + bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset); + info->changed_contents = TRUE; + + /* Reduce the use count on this got entry by one, possibly + eliminating it. */ + if (--info->gotent->use_count == 0) + { + int sz = alpha_got_entry_size (r_type); + alpha_elf_tdata (info->gotobj)->total_got_size -= sz; + if (!info->h) + alpha_elf_tdata (info->gotobj)->local_got_size -= sz; + } + + /* Smash the existing GOT relocation for its 16-bit immediate pair. */ + irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type); + info->changed_relocs = TRUE; + + /* ??? Search forward through this basic block looking for insns + that use the target register. Stop after an insn modifying the + register is seen, or after a branch or call. + + Any such memory load insn may be substituted by a load directly + off the GP. This allows the memory load insn to be issued before + the calculated GP register would otherwise be ready. + + Any such jsr insn can be replaced by a bsr if it is in range. + + This would mean that we'd have to _add_ relocations, the pain of + which gives one pause. */ + + return TRUE; +} + +static bfd_vma +elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval) +{ + /* If the function has the same gp, and we can identify that the + function does not use its function pointer, we can eliminate the + address load. */ + + /* If the symbol is marked NOPV, we are being told the function never + needs its procedure value. */ + if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV) + return symval; + + /* If the symbol is marked STD_GP, we are being told the function does + a normal ldgp in the first two words. */ + else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD) + ; + + /* Otherwise, we may be able to identify a GP load in the first two + words, which we can then skip. */ + else + { + Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp; + bfd_vma ofs; + + /* Load the relocations from the section that the target symbol is in. */ + if (info->sec == info->tsec) + { + tsec_relocs = info->relocs; + tsec_relend = info->relend; + tsec_free = NULL; + } + else + { + tsec_relocs = (_bfd_elf_link_read_relocs + (info->abfd, info->tsec, (PTR) NULL, + (Elf_Internal_Rela *) NULL, + info->link_info->keep_memory)); + if (tsec_relocs == NULL) + return 0; + tsec_relend = tsec_relocs + info->tsec->reloc_count; + tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs); + } + + /* Recover the symbol's offset within the section. */ + ofs = (symval - info->tsec->output_section->vma + - info->tsec->output_offset); + + /* Look for a GPDISP reloc. */ + gpdisp = (elf64_alpha_find_reloc_at_ofs + (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP)); + + if (!gpdisp || gpdisp->r_addend != 4) + { + if (tsec_free) + free (tsec_free); + return 0; + } + if (tsec_free) + free (tsec_free); + } + + /* We've now determined that we can skip an initial gp load. Verify + that the call and the target use the same gp. */ + if (info->link_info->hash->creator != info->tsec->owner->xvec + || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj) + return 0; + + return symval + 8; +} + +static bfd_boolean +elf64_alpha_relax_with_lituse (struct alpha_relax_info *info, + bfd_vma symval, Elf_Internal_Rela *irel) +{ + Elf_Internal_Rela *urel, *irelend = info->relend; + int flags, count, i; + bfd_signed_vma disp; + bfd_boolean fits16; + bfd_boolean fits32; + bfd_boolean lit_reused = FALSE; + bfd_boolean all_optimized = TRUE; + unsigned int lit_insn; + + lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); + if (lit_insn >> 26 != OP_LDQ) + { + ((*_bfd_error_handler) + ("%B: %A+0x%lx: warning: LITERAL relocation against unexpected insn", + info->abfd, info->sec, + (unsigned long) irel->r_offset)); + return TRUE; + } + + /* Can't relax dynamic symbols. */ + if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) + return TRUE; + + /* Summarize how this particular LITERAL is used. */ + for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count) + { + if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE) + break; + if (urel->r_addend <= 3) + flags |= 1 << urel->r_addend; + } + + /* A little preparation for the loop... */ + disp = symval - info->gp; + + for (urel = irel+1, i = 0; i < count; ++i, ++urel) + { + unsigned int insn; + int insn_disp; + bfd_signed_vma xdisp; + + insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset); + + switch (urel->r_addend) + { + case LITUSE_ALPHA_ADDR: + default: + /* This type is really just a placeholder to note that all + uses cannot be optimized, but to still allow some. */ + all_optimized = FALSE; + break; + + case LITUSE_ALPHA_BASE: + /* We can always optimize 16-bit displacements. */ + + /* Extract the displacement from the instruction, sign-extending + it if necessary, then test whether it is within 16 or 32 bits + displacement from GP. */ + insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000; + + xdisp = disp + insn_disp; + fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000); + fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 + && xdisp < 0x7fff8000); + + if (fits16) + { + /* Take the op code and dest from this insn, take the base + register from the literal insn. Leave the offset alone. */ + insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000); + urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), + R_ALPHA_GPREL16); + urel->r_addend = irel->r_addend; + info->changed_relocs = TRUE; + + bfd_put_32 (info->abfd, (bfd_vma) insn, + info->contents + urel->r_offset); + info->changed_contents = TRUE; + } + + /* If all mem+byte, we can optimize 32-bit mem displacements. */ + else if (fits32 && !(flags & ~6)) + { + /* FIXME: sanity check that lit insn Ra is mem insn Rb. */ + + irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), + R_ALPHA_GPRELHIGH); + lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000); + bfd_put_32 (info->abfd, (bfd_vma) lit_insn, + info->contents + irel->r_offset); + lit_reused = TRUE; + info->changed_contents = TRUE; + + urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), + R_ALPHA_GPRELLOW); + urel->r_addend = irel->r_addend; + info->changed_relocs = TRUE; + } + else + all_optimized = FALSE; + break; + + case LITUSE_ALPHA_BYTOFF: + /* We can always optimize byte instructions. */ + + /* FIXME: sanity check the insn for byte op. Check that the + literal dest reg is indeed Rb in the byte insn. */ + + insn &= ~ (unsigned) 0x001ff000; + insn |= ((symval & 7) << 13) | 0x1000; + + urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + urel->r_addend = 0; + info->changed_relocs = TRUE; + + bfd_put_32 (info->abfd, (bfd_vma) insn, + info->contents + urel->r_offset); + info->changed_contents = TRUE; + break; + + case LITUSE_ALPHA_JSR: + case LITUSE_ALPHA_TLSGD: + case LITUSE_ALPHA_TLSLDM: + { + bfd_vma optdest, org; + bfd_signed_vma odisp; + + /* For undefined weak symbols, we're mostly interested in getting + rid of the got entry whenever possible, so optimize this to a + use of the zero register. */ + if (info->h && info->h->root.root.type == bfd_link_hash_undefweak) + { + insn |= 31 << 16; + bfd_put_32 (info->abfd, (bfd_vma) insn, + info->contents + urel->r_offset); + + info->changed_contents = TRUE; + break; + } + + /* If not zero, place to jump without needing pv. */ + optdest = elf64_alpha_relax_opt_call (info, symval); + org = (info->sec->output_section->vma + + info->sec->output_offset + + urel->r_offset + 4); + odisp = (optdest ? optdest : symval) - org; + + if (odisp >= -0x400000 && odisp < 0x400000) + { + Elf_Internal_Rela *xrel; + + /* Preserve branch prediction call stack when possible. */ + if ((insn & INSN_JSR_MASK) == INSN_JSR) + insn = (OP_BSR << 26) | (insn & 0x03e00000); + else + insn = (OP_BR << 26) | (insn & 0x03e00000); + + urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), + R_ALPHA_BRADDR); + urel->r_addend = irel->r_addend; + + if (optdest) + urel->r_addend += optdest - symval; + else + all_optimized = FALSE; + + bfd_put_32 (info->abfd, (bfd_vma) insn, + info->contents + urel->r_offset); + + /* Kill any HINT reloc that might exist for this insn. */ + xrel = (elf64_alpha_find_reloc_at_ofs + (info->relocs, info->relend, urel->r_offset, + R_ALPHA_HINT)); + if (xrel) + xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + + info->changed_contents = TRUE; + info->changed_relocs = TRUE; + } + else + all_optimized = FALSE; + + /* Even if the target is not in range for a direct branch, + if we share a GP, we can eliminate the gp reload. */ + if (optdest) + { + Elf_Internal_Rela *gpdisp + = (elf64_alpha_find_reloc_at_ofs + (info->relocs, irelend, urel->r_offset + 4, + R_ALPHA_GPDISP)); + if (gpdisp) + { + bfd_byte *p_ldah = info->contents + gpdisp->r_offset; + bfd_byte *p_lda = p_ldah + gpdisp->r_addend; + unsigned int ldah = bfd_get_32 (info->abfd, p_ldah); + unsigned int lda = bfd_get_32 (info->abfd, p_lda); + + /* Verify that the instruction is "ldah $29,0($26)". + Consider a function that ends in a noreturn call, + and that the next function begins with an ldgp, + and that by accident there is no padding between. + In that case the insn would use $27 as the base. */ + if (ldah == 0x27ba0000 && lda == 0x23bd0000) + { + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah); + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda); + + gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + info->changed_contents = TRUE; + info->changed_relocs = TRUE; + } + } + } + } + break; + } + } + + /* If all cases were optimized, we can reduce the use count on this + got entry by one, possibly eliminating it. */ + if (all_optimized) + { + if (--info->gotent->use_count == 0) + { + int sz = alpha_got_entry_size (R_ALPHA_LITERAL); + alpha_elf_tdata (info->gotobj)->total_got_size -= sz; + if (!info->h) + alpha_elf_tdata (info->gotobj)->local_got_size -= sz; + } + + /* If the literal instruction is no longer needed (it may have been + reused. We can eliminate it. */ + /* ??? For now, I don't want to deal with compacting the section, + so just nop it out. */ + if (!lit_reused) + { + irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + info->changed_relocs = TRUE; + + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, + info->contents + irel->r_offset); + info->changed_contents = TRUE; + } + + return TRUE; + } + else + return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL); +} + +static bfd_boolean +elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval, + Elf_Internal_Rela *irel, bfd_boolean is_gd) +{ + bfd_byte *pos[5]; + unsigned int insn; + Elf_Internal_Rela *gpdisp, *hint; + bfd_boolean dynamic, use_gottprel, pos1_unusable; + unsigned long new_symndx; + + dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info); + + /* If a TLS symbol is accessed using IE at least once, there is no point + to use dynamic model for it. */ + if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE)) + ; + + /* If the symbol is local, and we've already committed to DF_STATIC_TLS, + then we might as well relax to IE. */ + else if (info->link_info->shared && !dynamic + && (info->link_info->flags & DF_STATIC_TLS)) + ; + + /* Otherwise we must be building an executable to do anything. */ + else if (info->link_info->shared) + return TRUE; + + /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and + the matching LITUSE_TLS relocations. */ + if (irel + 2 >= info->relend) + return TRUE; + if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL + || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE + || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM)) + return TRUE; + + /* There must be a GPDISP relocation positioned immediately after the + LITUSE relocation. */ + gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, + irel[2].r_offset + 4, R_ALPHA_GPDISP); + if (!gpdisp) + return TRUE; + + pos[0] = info->contents + irel[0].r_offset; + pos[1] = info->contents + irel[1].r_offset; + pos[2] = info->contents + irel[2].r_offset; + pos[3] = info->contents + gpdisp->r_offset; + pos[4] = pos[3] + gpdisp->r_addend; + pos1_unusable = FALSE; + + /* Generally, the positions are not allowed to be out of order, lest the + modified insn sequence have different register lifetimes. We can make + an exception when pos 1 is adjacent to pos 0. */ + if (pos[1] + 4 == pos[0]) + { + bfd_byte *tmp = pos[0]; + pos[0] = pos[1]; + pos[1] = tmp; + } + else if (pos[1] < pos[0]) + pos1_unusable = TRUE; + if (pos[1] >= pos[2] || pos[2] >= pos[3]) + return TRUE; + + /* Reduce the use count on the LITERAL relocation. Do this before we + smash the symndx when we adjust the relocations below. */ + { + struct alpha_elf_got_entry *lit_gotent; + struct alpha_elf_link_hash_entry *lit_h; + unsigned long indx; + + BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info); + indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info; + lit_h = alpha_elf_sym_hashes (info->abfd)[indx]; + + while (lit_h->root.root.type == bfd_link_hash_indirect + || lit_h->root.root.type == bfd_link_hash_warning) + lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link; + + for (lit_gotent = lit_h->got_entries; lit_gotent ; + lit_gotent = lit_gotent->next) + if (lit_gotent->gotobj == info->gotobj + && lit_gotent->reloc_type == R_ALPHA_LITERAL + && lit_gotent->addend == irel[1].r_addend) + break; + BFD_ASSERT (lit_gotent); + + if (--lit_gotent->use_count == 0) + { + int sz = alpha_got_entry_size (R_ALPHA_LITERAL); + alpha_elf_tdata (info->gotobj)->total_got_size -= sz; + } + } + + /* Change + + lda $16,x($gp) !tlsgd!1 + ldq $27,__tls_get_addr($gp) !literal!1 + jsr $26,($27),__tls_get_addr !lituse_tlsgd!1 + ldah $29,0($26) !gpdisp!2 + lda $29,0($29) !gpdisp!2 + to + ldq $16,x($gp) !gottprel + unop + call_pal rduniq + addq $16,$0,$0 + unop + or the first pair to + lda $16,x($gp) !tprel + unop + or + ldah $16,x($gp) !tprelhi + lda $16,x($16) !tprello + + as appropriate. */ + + use_gottprel = FALSE; + new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : 0; + switch (!dynamic && !info->link_info->shared) + { + case 1: + { + bfd_vma tp_base; + bfd_signed_vma disp; + + BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); + tp_base = alpha_get_tprel_base (info->link_info); + disp = symval - tp_base; + + if (disp >= -0x8000 && disp < 0x8000) + { + insn = (OP_LDA << 26) | (16 << 21) | (31 << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); + + irel[0].r_offset = pos[0] - info->contents; + irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16); + irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + break; + } + else if (disp >= -(bfd_signed_vma) 0x80000000 + && disp < (bfd_signed_vma) 0x7fff8000 + && !pos1_unusable) + { + insn = (OP_LDAH << 26) | (16 << 21) | (31 << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); + insn = (OP_LDA << 26) | (16 << 21) | (16 << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]); + + irel[0].r_offset = pos[0] - info->contents; + irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI); + irel[1].r_offset = pos[1] - info->contents; + irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO); + break; + } + } + /* FALLTHRU */ + + default: + use_gottprel = TRUE; + + insn = (OP_LDQ << 26) | (16 << 21) | (29 << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); + + irel[0].r_offset = pos[0] - info->contents; + irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL); + irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + break; + } + + bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]); + + insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]); + + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]); + + irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + + hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, + irel[2].r_offset, R_ALPHA_HINT); + if (hint) + hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + + info->changed_contents = TRUE; + info->changed_relocs = TRUE; + + /* Reduce the use count on the TLSGD/TLSLDM relocation. */ + if (--info->gotent->use_count == 0) + { + int sz = alpha_got_entry_size (info->gotent->reloc_type); + alpha_elf_tdata (info->gotobj)->total_got_size -= sz; + if (!info->h) + alpha_elf_tdata (info->gotobj)->local_got_size -= sz; + } + + /* If we've switched to a GOTTPREL relocation, increment the reference + count on that got entry. */ + if (use_gottprel) + { + struct alpha_elf_got_entry *tprel_gotent; + + for (tprel_gotent = *info->first_gotent; tprel_gotent ; + tprel_gotent = tprel_gotent->next) + if (tprel_gotent->gotobj == info->gotobj + && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL + && tprel_gotent->addend == irel->r_addend) + break; + if (tprel_gotent) + tprel_gotent->use_count++; + else + { + if (info->gotent->use_count == 0) + tprel_gotent = info->gotent; + else + { + tprel_gotent = (struct alpha_elf_got_entry *) + bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry)); + if (!tprel_gotent) + return FALSE; + + tprel_gotent->next = *info->first_gotent; + *info->first_gotent = tprel_gotent; + + tprel_gotent->gotobj = info->gotobj; + tprel_gotent->addend = irel->r_addend; + tprel_gotent->got_offset = -1; + tprel_gotent->reloc_done = 0; + tprel_gotent->reloc_xlated = 0; + } + + tprel_gotent->use_count = 1; + tprel_gotent->reloc_type = R_ALPHA_GOTTPREL; + } + } + + return TRUE; +} + +static bfd_boolean +elf64_alpha_relax_section (bfd *abfd, asection *sec, + struct bfd_link_info *link_info, bfd_boolean *again) +{ + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Rela *internal_relocs; + Elf_Internal_Rela *irel, *irelend; + Elf_Internal_Sym *isymbuf = NULL; + struct alpha_elf_got_entry **local_got_entries; + struct alpha_relax_info info; + + /* We are not currently changing any sizes, so only one pass. */ + *again = FALSE; + + if (link_info->relocatable + || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC)) + != (SEC_CODE | SEC_RELOC | SEC_ALLOC)) + || sec->reloc_count == 0) + return TRUE; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; + + /* Load the relocations for this section. */ + internal_relocs = (_bfd_elf_link_read_relocs + (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, + link_info->keep_memory)); + if (internal_relocs == NULL) + return FALSE; + + memset(&info, 0, sizeof (info)); + info.abfd = abfd; + info.sec = sec; + info.link_info = link_info; + info.symtab_hdr = symtab_hdr; + info.relocs = internal_relocs; + info.relend = irelend = internal_relocs + sec->reloc_count; + + /* Find the GP for this object. Do not store the result back via + _bfd_set_gp_value, since this could change again before final. */ + info.gotobj = alpha_elf_tdata (abfd)->gotobj; + if (info.gotobj) + { + asection *sgot = alpha_elf_tdata (info.gotobj)->got; + info.gp = (sgot->output_section->vma + + sgot->output_offset + + 0x8000); + } + + /* Get the section contents. */ + if (elf_section_data (sec)->this_hdr.contents != NULL) + info.contents = elf_section_data (sec)->this_hdr.contents; + else + { + if (!bfd_malloc_and_get_section (abfd, sec, &info.contents)) + goto error_return; + } + + for (irel = internal_relocs; irel < irelend; irel++) + { + bfd_vma symval; + struct alpha_elf_got_entry *gotent; + unsigned long r_type = ELF64_R_TYPE (irel->r_info); + unsigned long r_symndx = ELF64_R_SYM (irel->r_info); + + /* Early exit for unhandled or unrelaxable relocations. */ + switch (r_type) + { + case R_ALPHA_LITERAL: + case R_ALPHA_GPRELHIGH: + case R_ALPHA_GPRELLOW: + case R_ALPHA_GOTDTPREL: + case R_ALPHA_GOTTPREL: + case R_ALPHA_TLSGD: + break; + + case R_ALPHA_TLSLDM: + /* The symbol for a TLSLDM reloc is ignored. Collapse the + reloc to the 0 symbol so that they all match. */ + r_symndx = 0; + break; + + default: + continue; + } + + /* Get the value of the symbol referred to by the reloc. */ + if (r_symndx < symtab_hdr->sh_info) + { + /* A local symbol. */ + Elf_Internal_Sym *isym; + + /* Read this BFD's local symbols. */ + if (isymbuf == NULL) + { + isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; + if (isymbuf == NULL) + isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, + symtab_hdr->sh_info, 0, + NULL, NULL, NULL); + if (isymbuf == NULL) + goto error_return; + } + + isym = isymbuf + r_symndx; + + /* Given the symbol for a TLSLDM reloc is ignored, this also + means forcing the symbol value to the tp base. */ + if (r_type == R_ALPHA_TLSLDM) + { + info.tsec = bfd_abs_section_ptr; + symval = alpha_get_tprel_base (info.link_info); + } + else + { + symval = isym->st_value; + if (isym->st_shndx == SHN_UNDEF) + continue; + else if (isym->st_shndx == SHN_ABS) + info.tsec = bfd_abs_section_ptr; + else if (isym->st_shndx == SHN_COMMON) + info.tsec = bfd_com_section_ptr; + else + info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); + } + + info.h = NULL; + info.other = isym->st_other; + if (local_got_entries) + info.first_gotent = &local_got_entries[r_symndx]; + else + { + info.first_gotent = &info.gotent; + info.gotent = NULL; + } + } + else + { + unsigned long indx; + struct alpha_elf_link_hash_entry *h; + + indx = r_symndx - symtab_hdr->sh_info; + h = alpha_elf_sym_hashes (abfd)[indx]; + BFD_ASSERT (h != NULL); + + while (h->root.root.type == bfd_link_hash_indirect + || h->root.root.type == bfd_link_hash_warning) + h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; + + /* If the symbol is undefined, we can't do anything with it. */ + if (h->root.root.type == bfd_link_hash_undefined) + continue; + + /* If the symbol isn't defined in the current module, + again we can't do anything. */ + if (h->root.root.type == bfd_link_hash_undefweak) + { + info.tsec = bfd_abs_section_ptr; + symval = 0; + } + else if (!h->root.def_regular) + { + /* Except for TLSGD relocs, which can sometimes be + relaxed to GOTTPREL relocs. */ + if (r_type != R_ALPHA_TLSGD) + continue; + info.tsec = bfd_abs_section_ptr; + symval = 0; + } + else + { + info.tsec = h->root.root.u.def.section; + symval = h->root.root.u.def.value; + } + + info.h = h; + info.other = h->root.other; + info.first_gotent = &h->got_entries; + } + + /* Search for the got entry to be used by this relocation. */ + for (gotent = *info.first_gotent; gotent ; gotent = gotent->next) + if (gotent->gotobj == info.gotobj + && gotent->reloc_type == r_type + && gotent->addend == irel->r_addend) + break; + info.gotent = gotent; + + symval += info.tsec->output_section->vma + info.tsec->output_offset; + symval += irel->r_addend; + + switch (r_type) + { + case R_ALPHA_LITERAL: + BFD_ASSERT(info.gotent != NULL); + + /* If there exist LITUSE relocations immediately following, this + opens up all sorts of interesting optimizations, because we + now know every location that this address load is used. */ + if (irel+1 < irelend + && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE) + { + if (!elf64_alpha_relax_with_lituse (&info, symval, irel)) + goto error_return; + } + else + { + if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) + goto error_return; + } + break; + case R_ALPHA_GOTDTPREL: + case R_ALPHA_GOTTPREL: + BFD_ASSERT(info.gotent != NULL); + if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) + goto error_return; + break; + + case R_ALPHA_TLSGD: + case R_ALPHA_TLSLDM: + BFD_ASSERT(info.gotent != NULL); + if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel, + r_type == R_ALPHA_TLSGD)) + goto error_return; + break; + } + } + + if (!elf64_alpha_size_plt_section (link_info)) + return FALSE; + if (!elf64_alpha_size_got_sections (link_info)) + return FALSE; + if (!elf64_alpha_size_rela_got_section (link_info)) + return FALSE; + + if (isymbuf != NULL + && symtab_hdr->contents != (unsigned char *) isymbuf) + { + if (!link_info->keep_memory) + free (isymbuf); + else + { + /* Cache the symbols for elf_link_input_bfd. */ + symtab_hdr->contents = (unsigned char *) isymbuf; + } + } + + if (info.contents != NULL + && elf_section_data (sec)->this_hdr.contents != info.contents) + { + if (!info.changed_contents && !link_info->keep_memory) + free (info.contents); + else + { + /* Cache the section contents for elf_link_input_bfd. */ + elf_section_data (sec)->this_hdr.contents = info.contents; + } + } + + if (elf_section_data (sec)->relocs != internal_relocs) + { + if (!info.changed_relocs) + free (internal_relocs); + else + elf_section_data (sec)->relocs = internal_relocs; + } + + *again = info.changed_contents || info.changed_relocs; + + return TRUE; + + error_return: + if (isymbuf != NULL + && symtab_hdr->contents != (unsigned char *) isymbuf) + free (isymbuf); + if (info.contents != NULL + && elf_section_data (sec)->this_hdr.contents != info.contents) + free (info.contents); + if (internal_relocs != NULL + && elf_section_data (sec)->relocs != internal_relocs) + free (internal_relocs); + return FALSE; +} + /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET) into the next available slot in SREL. */ static void -elf64_alpha_emit_dynrel (abfd, info, sec, srel, offset, dynindx, rtype, addend) - bfd *abfd; - struct bfd_link_info *info; - asection *sec, *srel; - bfd_vma offset, addend; - long dynindx, rtype; +elf64_alpha_emit_dynrel (bfd *abfd, struct bfd_link_info *info, + asection *sec, asection *srel, bfd_vma offset, + long dynindx, long rtype, bfd_vma addend) { Elf_Internal_Rela outrel; bfd_byte *loc; @@ -4200,16 +3927,13 @@ elf64_alpha_emit_dynrel (abfd, info, sec, srel, offset, dynindx, rtype, addend) symbol winds up in the output section. */ static bfd_boolean -elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, input_section, - contents, relocs, local_syms, local_sections) - bfd *output_bfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - bfd *input_bfd; - asection *input_section; - bfd_byte *contents ATTRIBUTE_UNUSED; - Elf_Internal_Rela *relocs; - Elf_Internal_Sym *local_syms; - asection **local_sections; +elf64_alpha_relocate_section_r (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info ATTRIBUTE_UNUSED, + bfd *input_bfd, asection *input_section, + bfd_byte *contents ATTRIBUTE_UNUSED, + Elf_Internal_Rela *relocs, + Elf_Internal_Sym *local_syms, + asection **local_sections) { unsigned long symtab_hdr_sh_info; Elf_Internal_Rela *rel; @@ -4261,16 +3985,11 @@ elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, input_section, /* Relocate an Alpha ELF section. */ static bfd_boolean -elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, - contents, relocs, local_syms, local_sections) - bfd *output_bfd; - struct bfd_link_info *info; - bfd *input_bfd; - asection *input_section; - bfd_byte *contents; - Elf_Internal_Rela *relocs; - Elf_Internal_Sym *local_syms; - asection **local_sections; +elf64_alpha_relocate_section (bfd *output_bfd, struct bfd_link_info *info, + bfd *input_bfd, asection *input_section, + bfd_byte *contents, Elf_Internal_Rela *relocs, + Elf_Internal_Sym *local_syms, + asection **local_sections) { Elf_Internal_Shdr *symtab_hdr; Elf_Internal_Rela *rel; @@ -4902,11 +4621,9 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, dynamic sections here. */ static bfd_boolean -elf64_alpha_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; +elf64_alpha_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) { bfd *dynobj = elf_hash_table(info)->dynobj; @@ -5064,9 +4781,8 @@ elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym) /* Finish up the dynamic sections. */ static bfd_boolean -elf64_alpha_finish_dynamic_sections (output_bfd, info) - bfd *output_bfd; - struct bfd_link_info *info; +elf64_alpha_finish_dynamic_sections (bfd *output_bfd, + struct bfd_link_info *info) { bfd *dynobj; asection *sdyn; @@ -5153,9 +4869,7 @@ elf64_alpha_finish_dynamic_sections (output_bfd, info) them all out sequentially. */ static bfd_boolean -elf64_alpha_final_link (abfd, info) - bfd *abfd; - struct bfd_link_info *info; +elf64_alpha_final_link (bfd *abfd, struct bfd_link_info *info) { asection *o; struct bfd_link_order *p; @@ -5422,8 +5136,7 @@ elf64_alpha_final_link (abfd, info) } static enum elf_reloc_type_class -elf64_alpha_reloc_type_class (rela) - const Elf_Internal_Rela *rela; +elf64_alpha_reloc_type_class (const Elf_Internal_Rela *rela) { switch ((int) ELF64_R_TYPE (rela->r_info)) { @@ -5638,13 +5351,9 @@ static const struct elf_size_info alpha_elf_size_info = "FreeBSD" label in the ELF header. So we put this label on all executables and (for simplicity) also all other object files. */ -static void elf64_alpha_fbsd_post_process_headers - PARAMS ((bfd *, struct bfd_link_info *)); - static void -elf64_alpha_fbsd_post_process_headers (abfd, link_info) - bfd * abfd; - struct bfd_link_info * link_info ATTRIBUTE_UNUSED; +elf64_alpha_fbsd_post_process_headers (bfd * abfd, + struct bfd_link_info * link_info ATTRIBUTE_UNUSED) { Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |