X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=bfd%2Felf64-alpha.c;h=681f792c7131a58aff32bc659664604e2aba080c;hb=33c2b983b4854cf4dbbeefa45506a1812a60328e;hp=1778b9226ae3493191407948186a253c5e0a78e2;hpb=487c435301ca74f6ef5dced9e1a0e60815ecddb7;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/elf64-alpha.c b/bfd/elf64-alpha.c index 1778b9226a..681f792c71 100644 --- a/bfd/elf64-alpha.c +++ b/bfd/elf64-alpha.c @@ -1,13 +1,12 @@ /* Alpha specific support for 64-bit ELF - Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 - Free Software Foundation, Inc. + Copyright (C) 1996-2016 Free Software Foundation, Inc. Contributed by Richard Henderson . This file is part of BFD, the Binary File Descriptor library. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or + the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, @@ -17,13 +16,15 @@ You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + /* We need a published ABI spec for this. Until one comes out, don't assume this'll remain unchanged forever. */ -#include "bfd.h" #include "sysdep.h" +#include "bfd.h" #include "libbfd.h" #include "elf-bfd.h" @@ -47,188 +48,138 @@ #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; + +/* Instruction data for plt generation and relaxation. */ + +#define OP_LDA 0x08 +#define OP_LDAH 0x09 +#define OP_LDQ 0x29 +#define OP_BR 0x30 +#define OP_BSR 0x34 + +#define INSN_LDA (OP_LDA << 26) +#define INSN_LDAH (OP_LDAH << 26) +#define INSN_LDQ (OP_LDQ << 26) +#define INSN_BR (OP_BR << 26) + +#define INSN_ADDQ 0x40000400 +#define INSN_RDUNIQ 0x0000009e +#define INSN_SUBQ 0x40000520 +#define INSN_S4SUBQ 0x40000560 +#define INSN_UNOP 0x2ffe0000 + +#define INSN_JSR 0x68004000 +#define INSN_JMP 0x68000000 +#define INSN_JSR_MASK 0xfc00c000 + +#define INSN_A(I,A) (I | (A << 21)) +#define INSN_AB(I,A,B) (I | (A << 21) | (B << 16)) +#define INSN_ABC(I,A,B,C) (I | (A << 21) | (B << 16) | C) +#define INSN_ABO(I,A,B,O) (I | (A << 21) | (B << 16) | ((O) & 0xffff)) +#define INSN_AD(I,A,D) (I | (A << 21) | (((D) >> 2) & 0x1fffff)) + +/* PLT/GOT Stuff */ + +/* Set by ld emulation. Putting this into the link_info or hash structure + is simply working too hard. */ +#ifdef USE_SECUREPLT +bfd_boolean elf64_alpha_use_secureplt = TRUE; +#else +bfd_boolean elf64_alpha_use_secureplt = FALSE; #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 *)); +#define OLD_PLT_HEADER_SIZE 32 +#define OLD_PLT_ENTRY_SIZE 12 +#define NEW_PLT_HEADER_SIZE 36 +#define NEW_PLT_ENTRY_SIZE 4 + +#define PLT_HEADER_SIZE \ + (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE) +#define PLT_ENTRY_SIZE \ + (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE) + +#define MAX_GOT_SIZE (64*1024) + +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so" -struct alpha_elf_link_hash_entry + +/* Used to implement multiple .got subsections. */ +struct alpha_elf_got_entry { - struct elf_link_hash_entry root; + struct alpha_elf_got_entry *next; - /* External symbol information. */ - EXTR esym; + /* Which .got subsection? */ + bfd *gotobj; - /* Cumulative flags for all the .got entries. */ - int flags; + /* The addend in effect for this entry. */ + bfd_vma addend; - /* Contexts in which a literal was referenced. */ -#define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01 -#define ALPHA_ELF_LINK_HASH_LU_MEM 0x02 -#define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04 -#define ALPHA_ELF_LINK_HASH_LU_JSR 0x08 -#define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10 -#define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20 -#define ALPHA_ELF_LINK_HASH_LU_FUNC 0x38 -#define ALPHA_ELF_LINK_HASH_TLS_IE 0x40 -#define ALPHA_ELF_LINK_HASH_PLT_LOC 0x80 - - /* Used to undo the localization of a plt symbol. */ - asection *plt_old_section; - bfd_vma plt_old_value; + /* The .got offset for this entry. */ + int got_offset; - /* Used to implement multiple .got subsections. */ - struct alpha_elf_got_entry - { - struct alpha_elf_got_entry *next; + /* The .plt offset for this entry. */ + int plt_offset; + + /* How many references to this entry? */ + int use_count; - /* Which .got subsection? */ - bfd *gotobj; + /* The relocation type of this entry. */ + unsigned char reloc_type; - /* The addend in effect for this entry. */ - bfd_vma addend; + /* How a LITERAL is used. */ + unsigned char flags; - /* The .got offset for this entry. */ - int got_offset; + /* Have we initialized the dynamic relocation for this entry? */ + unsigned char reloc_done; - /* How many references to this entry? */ - int use_count; + /* Have we adjusted this entry for SEC_MERGE? */ + unsigned char reloc_xlated; +}; - /* The relocation type of this entry. */ - unsigned char reloc_type; +struct alpha_elf_reloc_entry +{ + struct alpha_elf_reloc_entry *next; - /* How a LITERAL is used. */ - unsigned char flags; + /* Which .reloc section? */ + asection *srel; - /* Have we initialized the dynamic relocation for this entry? */ - unsigned char reloc_done; + /* What kind of relocation? */ + unsigned int rtype; - /* Have we adjusted this entry for SEC_MERGE? */ - unsigned char reloc_xlated; - } *got_entries; + /* Is this against read-only section? */ + unsigned int reltext : 1; - /* Used to count non-got, non-plt relocations for delayed sizing - of relocation sections. */ - struct alpha_elf_reloc_entry - { - struct alpha_elf_reloc_entry *next; + /* How many did we find? */ + unsigned long count; +}; + +struct alpha_elf_link_hash_entry +{ + struct elf_link_hash_entry root; + + /* External symbol information. */ + EXTR esym; - /* Which .reloc section? */ - asection *srel; + /* Cumulative flags for all the .got entries. */ + int flags; - /* What kind of relocation? */ - unsigned int rtype; + /* Contexts in which a literal was referenced. */ +#define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01 +#define ALPHA_ELF_LINK_HASH_LU_MEM 0x02 +#define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04 +#define ALPHA_ELF_LINK_HASH_LU_JSR 0x08 +#define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10 +#define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20 +#define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40 +#define ALPHA_ELF_LINK_HASH_LU_PLT 0x38 +#define ALPHA_ELF_LINK_HASH_TLS_IE 0x80 - /* Is this against read-only section? */ - unsigned int reltext : 1; + /* Used to implement multiple .got subsections. */ + struct alpha_elf_got_entry *got_entries; - /* How many did we find? */ - unsigned long count; - } *reloc_entries; + /* Used to count non-got, non-plt relocations for delayed sizing + of relocation sections. */ + struct alpha_elf_reloc_entry *reloc_entries; }; /* Alpha ELF linker hash table. */ @@ -240,6 +191,10 @@ struct alpha_elf_link_hash_table /* The head of a list of .got subsections linked through alpha_elf_tdata(abfd)->got_link_next. */ bfd *got_list; + + /* The most recent relax pass that we've seen. The GOTs + should be regenerated if this doesn't match. */ + int relax_trip; }; /* Look up an entry in a Alpha ELF linker hash table. */ @@ -254,28 +209,28 @@ 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 *, void *)) (func), \ (info))) /* Get the Alpha ELF linker hash table from a link_info structure. */ #define alpha_elf_hash_table(p) \ - ((struct alpha_elf_link_hash_table *) ((p)->hash)) + (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ + == ALPHA_ELF_DATA ? ((struct alpha_elf_link_hash_table *) ((p)->hash)) : NULL) /* Get the object's symbols as our own entry type. */ #define alpha_elf_sym_hashes(abfd) \ ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd)) -/* Should we do dynamic things to this symbol? This differs from the +/* Should we do dynamic things to this symbol? This differs from the generic version in that we never need to consider function pointer equality wrt PLT entries -- we don't create a PLT entry if a symbol's 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 +238,9 @@ 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 +276,7 @@ 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); @@ -332,8 +285,10 @@ elf64_alpha_bfd_link_hash_table_create (abfd) if (ret == (struct alpha_elf_link_hash_table *) NULL) return NULL; - if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, - elf64_alpha_link_hash_newfunc)) + if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, + elf64_alpha_link_hash_newfunc, + sizeof (struct alpha_elf_link_hash_entry), + ALPHA_ELF_DATA)) { free (ret); return NULL; @@ -342,6 +297,15 @@ elf64_alpha_bfd_link_hash_table_create (abfd) return &ret->root.root; } +/* Alpha ELF follows MIPS ELF in using a special find_nearest_line + routine in order to handle the ECOFF debugging information. */ + +struct alpha_elf_find_line +{ + struct ecoff_debug_info d; + struct ecoff_find_line i; +}; + /* We have some private fields hanging off of the elf_tdata structure. */ struct alpha_elf_obj_tdata @@ -371,43 +335,159 @@ struct alpha_elf_obj_tdata /* For every got, this is the sum of the number of words required to hold all of the member object's local got. */ int local_got_size; + + /* Used by elf64_alpha_find_nearest_line entry point. */ + struct alpha_elf_find_line *find_line_info; + }; #define alpha_elf_tdata(abfd) \ ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any) +#define is_alpha_elf(bfd) \ + (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ + && elf_tdata (bfd) != NULL \ + && elf_object_id (bfd) == ALPHA_ELF_DATA) + 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); - if (abfd->tdata.any == NULL) - return FALSE; - return TRUE; + return bfd_elf_allocate_object (abfd, sizeof (struct alpha_elf_obj_tdata), + ALPHA_ELF_DATA); } 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, + void * 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, + void * 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, void * 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) + #define SKIP_HOWTO(N) \ - HOWTO(N, 0, 0, 0, 0, 0, 0, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0) + HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0) static reloc_howto_type elf64_alpha_howto_table[] = { HOWTO (R_ALPHA_NONE, /* type */ 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 8, /* bitsize */ + 3, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ @@ -426,7 +506,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "REFLONG", /* name */ FALSE, /* partial_inplace */ 0xffffffff, /* src_mask */ @@ -441,7 +521,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "REFQUAD", /* name */ FALSE, /* partial_inplace */ MINUS_ONE, /* src_mask */ @@ -458,7 +538,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "GPREL32", /* name */ FALSE, /* partial_inplace */ 0xffffffff, /* src_mask */ @@ -473,7 +553,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "ELF_LITERAL", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -539,7 +619,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "BRADDR", /* name */ FALSE, /* partial_inplace */ 0x1fffff, /* src_mask */ @@ -554,7 +634,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "HINT", /* name */ FALSE, /* partial_inplace */ 0x3fff, /* src_mask */ @@ -569,7 +649,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "SREL16", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -584,7 +664,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "SREL32", /* name */ FALSE, /* partial_inplace */ 0xffffffff, /* src_mask */ @@ -599,7 +679,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "SREL64", /* name */ FALSE, /* partial_inplace */ MINUS_ONE, /* src_mask */ @@ -621,7 +701,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "GPRELHIGH", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -636,7 +716,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "GPRELLOW", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -651,7 +731,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "GPREL16", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -737,7 +817,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "BRSGP", /* name */ FALSE, /* partial_inplace */ 0x1fffff, /* src_mask */ @@ -752,7 +832,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "TLSGD", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -767,7 +847,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "TLSLDM", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -782,7 +862,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "DTPMOD64", /* name */ FALSE, /* partial_inplace */ MINUS_ONE, /* src_mask */ @@ -798,7 +878,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "GOTDTPREL", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -813,7 +893,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "DTPREL64", /* name */ FALSE, /* partial_inplace */ MINUS_ONE, /* src_mask */ @@ -828,7 +908,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "DTPRELHI", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -843,7 +923,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "DTPRELLO", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -858,7 +938,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "DTPREL16", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -874,7 +954,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "GOTTPREL", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -889,7 +969,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "TPREL64", /* name */ FALSE, /* partial_inplace */ MINUS_ONE, /* src_mask */ @@ -904,7 +984,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "TPRELHI", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -919,7 +999,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "TPRELLO", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -934,7 +1014,7 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ - 0, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "TPREL16", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -942,205 +1022,97 @@ static reloc_howto_type elf64_alpha_howto_table[] = FALSE), /* pcrel_offset */ }; -/* A relocation function which doesn't do anything. */ +/* A mapping from BFD reloc types to Alpha ELF reloc types. */ -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; +struct elf_reloc_map { - if (output_bfd) - reloc->address += sec->output_offset; - return bfd_reloc_ok; -} + bfd_reloc_code_real_type bfd_reloc_val; + int elf_reloc_val; +}; -/* A relocation function used for an unsupported reloc. */ +static const struct elf_reloc_map elf64_alpha_reloc_map[] = +{ + {BFD_RELOC_NONE, R_ALPHA_NONE}, + {BFD_RELOC_32, R_ALPHA_REFLONG}, + {BFD_RELOC_64, R_ALPHA_REFQUAD}, + {BFD_RELOC_CTOR, R_ALPHA_REFQUAD}, + {BFD_RELOC_GPREL32, R_ALPHA_GPREL32}, + {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL}, + {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE}, + {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP}, + {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR}, + {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT}, + {BFD_RELOC_16_PCREL, R_ALPHA_SREL16}, + {BFD_RELOC_32_PCREL, R_ALPHA_SREL32}, + {BFD_RELOC_64_PCREL, R_ALPHA_SREL64}, + {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH}, + {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW}, + {BFD_RELOC_GPREL16, R_ALPHA_GPREL16}, + {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP}, + {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD}, + {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM}, + {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64}, + {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL}, + {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64}, + {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI}, + {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO}, + {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16}, + {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL}, + {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64}, + {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI}, + {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO}, + {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16}, +}; -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; +/* Given a BFD reloc type, return a HOWTO structure. */ + +static reloc_howto_type * +elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) { - if (output_bfd) - reloc->address += sec->output_offset; - return bfd_reloc_notsupported; + const struct elf_reloc_map *i, *e; + i = e = elf64_alpha_reloc_map; + e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map); + for (; i != e; ++i) + { + if (i->bfd_reloc_val == code) + return &elf64_alpha_howto_table[i->elf_reloc_val]; + } + return 0; } -/* 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; +static reloc_howto_type * +elf64_alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, + const char *r_name) { - bfd_reloc_status_type ret = bfd_reloc_ok; - bfd_vma addend; - unsigned long i_ldah, i_lda; + unsigned int i; - i_ldah = bfd_get_32 (abfd, p_ldah); - i_lda = bfd_get_32 (abfd, p_lda); + for (i = 0; + i < (sizeof (elf64_alpha_howto_table) + / sizeof (elf64_alpha_howto_table[0])); + i++) + if (elf64_alpha_howto_table[i].name != NULL + && strcasecmp (elf64_alpha_howto_table[i].name, r_name) == 0) + return &elf64_alpha_howto_table[i]; - /* Complain if the instructions are not correct. */ - if (((i_ldah >> 26) & 0x3f) != 0x09 - || ((i_lda >> 26) & 0x3f) != 0x08) - ret = bfd_reloc_dangerous; + return NULL; +} - /* 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; +/* Given an Alpha ELF reloc type, fill in an arelent structure. */ - gpdisp += addend; +static void +elf64_alpha_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, + Elf_Internal_Rela *dst) +{ + unsigned r_type = ELF64_R_TYPE(dst->r_info); - 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 -{ - bfd_reloc_code_real_type bfd_reloc_val; - int elf_reloc_val; -}; - -static const struct elf_reloc_map elf64_alpha_reloc_map[] = -{ - {BFD_RELOC_NONE, R_ALPHA_NONE}, - {BFD_RELOC_32, R_ALPHA_REFLONG}, - {BFD_RELOC_64, R_ALPHA_REFQUAD}, - {BFD_RELOC_CTOR, R_ALPHA_REFQUAD}, - {BFD_RELOC_GPREL32, R_ALPHA_GPREL32}, - {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL}, - {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE}, - {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP}, - {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR}, - {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT}, - {BFD_RELOC_16_PCREL, R_ALPHA_SREL16}, - {BFD_RELOC_32_PCREL, R_ALPHA_SREL32}, - {BFD_RELOC_64_PCREL, R_ALPHA_SREL64}, - {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH}, - {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW}, - {BFD_RELOC_GPREL16, R_ALPHA_GPREL16}, - {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP}, - {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD}, - {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM}, - {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64}, - {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL}, - {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64}, - {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI}, - {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO}, - {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16}, - {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL}, - {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64}, - {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI}, - {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO}, - {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16}, -}; - -/* 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; -{ - const struct elf_reloc_map *i, *e; - i = e = elf64_alpha_reloc_map; - e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map); - for (; i != e; ++i) + if (r_type >= R_ALPHA_max) { - if (i->bfd_reloc_val == code) - return &elf64_alpha_howto_table[i->elf_reloc_val]; + (*_bfd_error_handler) (_("%B: unrecognised Alpha reloc number: %d"), + abfd, r_type); + bfd_set_error (bfd_error_bad_value); + r_type = R_ALPHA_NONE; } - return 0; -} - -/* 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; -{ - unsigned r_type; - - 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]; } @@ -1159,2966 +1131,2969 @@ 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; -} +/* Handle an Alpha specific section when reading an object file. This + is called when bfd_section_from_shdr finds a section with an unknown + type. + FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure + how to. */ static bfd_boolean -elf64_alpha_relax_with_lituse (info, symval, irel) - struct alpha_relax_info *info; - bfd_vma symval; - Elf_Internal_Rela *irel; +elf64_alpha_section_from_shdr (bfd *abfd, + Elf_Internal_Shdr *hdr, + const char *name, + int shindex) { - 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; + asection *newsect; - lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); - if (lit_insn >> 26 != OP_LDQ) + /* There ought to be a place to keep ELF backend specific flags, but + at the moment there isn't one. We just keep track of the + sections by their name, instead. Fortunately, the ABI gives + suggested names for all the MIPS specific sections, so we will + probably get away with this. */ + switch (hdr->sh_type) { - ((*_bfd_error_handler) - ("%B: %A+0x%lx: warning: LITERAL relocation against unexpected insn", - info->abfd, info->sec, - (unsigned long) irel->r_offset)); - return TRUE; + case SHT_ALPHA_DEBUG: + if (strcmp (name, ".mdebug") != 0) + return FALSE; + break; + default: + return FALSE; } - /* Can't relax dynamic symbols. */ - if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) - return TRUE; + if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) + return FALSE; + newsect = hdr->bfd_section; - /* Summarize how this particular LITERAL is used. */ - for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count) + if (hdr->sh_type == SHT_ALPHA_DEBUG) { - if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE) - break; - if (urel->r_addend <= 3) - flags |= 1 << urel->r_addend; + if (! bfd_set_section_flags (abfd, newsect, + (bfd_get_section_flags (abfd, newsect) + | SEC_DEBUGGING))) + return FALSE; } - /* A little preparation for the loop... */ - disp = symval - info->gp; + return TRUE; +} - for (urel = irel+1, i = 0; i < count; ++i, ++urel) - { - unsigned int insn; - int insn_disp; - bfd_signed_vma xdisp; +/* Convert Alpha specific section flags to bfd internal section flags. */ - insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset); +static bfd_boolean +elf64_alpha_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) +{ + if (hdr->sh_flags & SHF_ALPHA_GPREL) + *flags |= SEC_SMALL_DATA; - 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; + return TRUE; +} - case LITUSE_ALPHA_BASE: - /* We can always optimize 16-bit displacements. */ +/* Set the correct type for an Alpha ELF section. We do this by the + section name, which is a hack, but ought to work. */ - /* 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 & 0x0000ffff; - if (insn_disp & 0x8000) - insn_disp |= ~0xffff; /* Negative: sign-extend. */ +static bfd_boolean +elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec) +{ + register const char *name; - xdisp = disp + insn_disp; - fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000); - fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 - && xdisp < 0x7fff8000); + name = bfd_get_section_name (abfd, sec); - 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; + if (strcmp (name, ".mdebug") == 0) + { + hdr->sh_type = SHT_ALPHA_DEBUG; + /* In a shared object on Irix 5.3, the .mdebug section has an + entsize of 0. FIXME: Does this matter? */ + if ((abfd->flags & DYNAMIC) != 0 ) + hdr->sh_entsize = 0; + else + hdr->sh_entsize = 1; + } + else if ((sec->flags & SEC_SMALL_DATA) + || strcmp (name, ".sdata") == 0 + || strcmp (name, ".sbss") == 0 + || strcmp (name, ".lit4") == 0 + || strcmp (name, ".lit8") == 0) + hdr->sh_flags |= SHF_ALPHA_GPREL; - bfd_put_32 (info->abfd, (bfd_vma) insn, - info->contents + urel->r_offset); - info->changed_contents = TRUE; - } + return 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. */ +/* Hook called by the linker routine which adds symbols from an object + file. We use it to put .comm items in .sbss, and not .bss. */ - 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; +static bfd_boolean +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 + && !bfd_link_relocatable (info) + && sym->st_size <= elf_gp_size (abfd)) + { + /* Common symbols less than or equal to -G nn bytes are + automatically put into .sbss. */ - 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; + asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); - case LITUSE_ALPHA_BYTOFF: - /* We can always optimize byte instructions. */ + if (scomm == NULL) + { + scomm = bfd_make_section_with_flags (abfd, ".scommon", + (SEC_ALLOC + | SEC_IS_COMMON + | SEC_LINKER_CREATED)); + if (scomm == NULL) + return FALSE; + } - /* FIXME: sanity check the insn for byte op. Check that the - literal dest reg is indeed Rb in the byte insn. */ + *secp = scomm; + *valp = sym->st_size; + } - insn &= ~ (unsigned) 0x001ff000; - insn |= ((symval & 7) << 13) | 0x1000; + return TRUE; +} - urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - urel->r_addend = 0; - info->changed_relocs = TRUE; +/* Create the .got section. */ - bfd_put_32 (info->abfd, (bfd_vma) insn, - info->contents + urel->r_offset); - info->changed_contents = TRUE; - break; +static bfd_boolean +elf64_alpha_create_got_section (bfd *abfd, + struct bfd_link_info *info ATTRIBUTE_UNUSED) +{ + flagword flags; + asection *s; - case LITUSE_ALPHA_JSR: - case LITUSE_ALPHA_TLSGD: - case LITUSE_ALPHA_TLSLDM: - { - bfd_vma optdest, org; - bfd_signed_vma odisp; + if (! is_alpha_elf (abfd)) + return FALSE; - /* 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; + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED); + s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); + if (s == NULL + || !bfd_set_section_alignment (abfd, s, 3)) + return FALSE; - if (odisp >= -0x400000 && odisp < 0x400000) - { - Elf_Internal_Rela *xrel; + alpha_elf_tdata (abfd)->got = s; - /* 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); + /* Make sure the object's gotobj is set to itself so that we default + to every object with its own .got. We'll merge .gots later once + we've collected each object's info. */ + alpha_elf_tdata (abfd)->gotobj = abfd; - urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), - R_ALPHA_BRADDR); - urel->r_addend = irel->r_addend; + return TRUE; +} - if (optdest) - urel->r_addend += optdest - symval; - else - all_optimized = FALSE; +/* Create all the dynamic sections. */ - bfd_put_32 (info->abfd, (bfd_vma) insn, - info->contents + urel->r_offset); +static bfd_boolean +elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) +{ + asection *s; + flagword flags; + struct elf_link_hash_entry *h; - /* 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); + if (! is_alpha_elf (abfd)) + return FALSE; - info->changed_contents = TRUE; - info->changed_relocs = TRUE; - } - else - all_optimized = FALSE; + /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */ - /* 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); + flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | (elf64_alpha_use_secureplt ? SEC_READONLY : 0)); + s = bfd_make_section_anyway_with_flags (abfd, ".plt", flags); + if (s == NULL || ! bfd_set_section_alignment (abfd, s, 4)) + return FALSE; - /* 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); + /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the + .plt section. */ + h = _bfd_elf_define_linkage_sym (abfd, info, s, + "_PROCEDURE_LINKAGE_TABLE_"); + elf_hash_table (info)->hplt = h; + if (h == NULL) + return FALSE; - gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - info->changed_contents = TRUE; - info->changed_relocs = TRUE; - } - } - } - } - break; - } - } + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED | SEC_READONLY); + s = bfd_make_section_anyway_with_flags (abfd, ".rela.plt", flags); + if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3)) + return FALSE; - /* If all cases were optimized, we can reduce the use count on this - got entry by one, possibly eliminating it. */ - if (all_optimized) + if (elf64_alpha_use_secureplt) { - 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; - } + flags = SEC_ALLOC | SEC_LINKER_CREATED; + s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); + if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3)) + return FALSE; + } - /* 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; + /* We may or may not have created a .got section for this object, but + we definitely havn't done the rest of the work. */ - bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, - info->contents + irel->r_offset); - info->changed_contents = TRUE; - } + if (alpha_elf_tdata(abfd)->gotobj == NULL) + { + if (!elf64_alpha_create_got_section (abfd, info)) + return FALSE; } + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED | SEC_READONLY); + s = bfd_make_section_anyway_with_flags (abfd, ".rela.got", flags); + if (s == NULL + || !bfd_set_section_alignment (abfd, s, 3)) + return FALSE; + + /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the + dynobj's .got section. We don't do this in the linker script + because we don't want to define the symbol if we are not creating + a global offset table. */ + h = _bfd_elf_define_linkage_sym (abfd, info, alpha_elf_tdata(abfd)->got, + "_GLOBAL_OFFSET_TABLE_"); + elf_hash_table (info)->hgot = h; + if (h == NULL) + return FALSE; + return TRUE; } + +/* Read ECOFF debugging information from a .mdebug section into a + ecoff_debug_info structure. */ -static bfd_vma -elf64_alpha_relax_opt_call (info, symval) - struct alpha_relax_info *info; - bfd_vma symval; +static bfd_boolean +elf64_alpha_read_ecoff_info (bfd *abfd, asection *section, + struct ecoff_debug_info *debug) { - /* 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. */ + HDRR *symhdr; + const struct ecoff_debug_swap *swap; + char *ext_hdr = NULL; - /* 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; + swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; + memset (debug, 0, sizeof (*debug)); - /* 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) - ; + ext_hdr = (char *) bfd_malloc (swap->external_hdr_size); + if (ext_hdr == NULL && swap->external_hdr_size != 0) + goto error_return; - /* 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; + if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, + swap->external_hdr_size)) + goto error_return; - /* 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); - } + symhdr = &debug->symbolic_header; + (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); - /* Recover the symbol's offset within the section. */ - ofs = (symval - info->tsec->output_section->vma - - info->tsec->output_offset); + /* The symbolic header contains absolute file offsets and sizes to + read. */ +#define READ(ptr, offset, count, size, type) \ + if (symhdr->count == 0) \ + debug->ptr = NULL; \ + else \ + { \ + bfd_size_type amt = (bfd_size_type) size * symhdr->count; \ + debug->ptr = (type) bfd_malloc (amt); \ + if (debug->ptr == NULL) \ + goto error_return; \ + if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ + || bfd_bread (debug->ptr, amt, abfd) != amt) \ + goto error_return; \ + } - /* Look for a GPDISP reloc. */ - gpdisp = (elf64_alpha_find_reloc_at_ofs - (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP)); + READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); + READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, void *); + READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, void *); + READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, void *); + READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, void *); + READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), + union aux_ext *); + READ (ss, cbSsOffset, issMax, sizeof (char), char *); + READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); + READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, void *); + READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, void *); + READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, void *); +#undef READ - if (!gpdisp || gpdisp->r_addend != 4) - { - if (tsec_free) - free (tsec_free); - return 0; - } - if (tsec_free) - free (tsec_free); - } + debug->fdr = NULL; - /* 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 TRUE; - return symval + 8; + error_return: + if (ext_hdr != NULL) + free (ext_hdr); + if (debug->line != NULL) + free (debug->line); + if (debug->external_dnr != NULL) + free (debug->external_dnr); + if (debug->external_pdr != NULL) + free (debug->external_pdr); + if (debug->external_sym != NULL) + free (debug->external_sym); + if (debug->external_opt != NULL) + free (debug->external_opt); + if (debug->external_aux != NULL) + free (debug->external_aux); + if (debug->ss != NULL) + free (debug->ss); + if (debug->ssext != NULL) + free (debug->ssext); + if (debug->external_fdr != NULL) + free (debug->external_fdr); + if (debug->external_rfd != NULL) + free (debug->external_rfd); + if (debug->external_ext != NULL) + free (debug->external_ext); + return FALSE; } +/* Alpha ELF local labels start with '$'. */ + 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; +elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name) { - 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; - } + return name[0] == '$'; +} - /* Can't relax dynamic symbols. */ - if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) - return TRUE; +static bfd_boolean +elf64_alpha_find_nearest_line (bfd *abfd, asymbol **symbols, + asection *section, bfd_vma offset, + const char **filename_ptr, + const char **functionname_ptr, + unsigned int *line_ptr, + unsigned int *discriminator_ptr) +{ + asection *msec; - /* Can't use local-exec relocations in shared libraries. */ - if (r_type == R_ALPHA_GOTTPREL && info->link_info->shared) + if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, + filename_ptr, functionname_ptr, + line_ptr, discriminator_ptr, + dwarf_debug_sections, 0, + &elf_tdata (abfd)->dwarf2_find_line_info)) return TRUE; - if (r_type == R_ALPHA_LITERAL) - disp = symval - info->gp; - else + msec = bfd_get_section_by_name (abfd, ".mdebug"); + if (msec != NULL) { - bfd_vma dtp_base, tp_base; + flagword origflags; + struct alpha_elf_find_line *fi; + const struct ecoff_debug_swap * const swap = + get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; - 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); - } + /* If we are called during a link, alpha_elf_final_link may have + cleared the SEC_HAS_CONTENTS field. We force it back on here + if appropriate (which it normally will be). */ + origflags = msec->flags; + if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS) + msec->flags |= SEC_HAS_CONTENTS; - if (disp < -0x8000 || disp >= 0x8000) - return TRUE; + fi = alpha_elf_tdata (abfd)->find_line_info; + if (fi == NULL) + { + bfd_size_type external_fdr_size; + char *fraw_src; + char *fraw_end; + struct fdr *fdr_ptr; + bfd_size_type amt = sizeof (struct alpha_elf_find_line); - /* Exchange LDQ for LDA. In the case of the TLS relocs, we're loading - a constant, so force the base register to be $31. */ - if (r_type == R_ALPHA_LITERAL) - insn = (OP_LDA << 26) | (insn & 0x03ff0000); - else - insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); - bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset); - info->changed_contents = TRUE; + fi = (struct alpha_elf_find_line *) bfd_zalloc (abfd, amt); + if (fi == NULL) + { + msec->flags = origflags; + return FALSE; + } - /* 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; - } + if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d)) + { + msec->flags = origflags; + return FALSE; + } - /* Smash the existing GOT relocation for its 16-bit immediate pair. */ - switch (r_type) - { - case R_ALPHA_LITERAL: - r_type = R_ALPHA_GPREL16; - break; - 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; - } + /* Swap in the FDR information. */ + amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr); + fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt); + if (fi->d.fdr == NULL) + { + msec->flags = origflags; + return FALSE; + } + external_fdr_size = swap->external_fdr_size; + fdr_ptr = fi->d.fdr; + fraw_src = (char *) fi->d.external_fdr; + fraw_end = (fraw_src + + fi->d.symbolic_header.ifdMax * external_fdr_size); + for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) + (*swap->swap_fdr_in) (abfd, fraw_src, fdr_ptr); - irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type); - info->changed_relocs = TRUE; + alpha_elf_tdata (abfd)->find_line_info = fi; - /* ??? 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. + /* Note that we don't bother to ever free this information. + find_nearest_line is either called all the time, as in + objdump -l, so the information should be saved, or it is + rarely called, as in ld error messages, so the memory + wasted is unimportant. Still, it would probably be a + good idea for free_cached_info to throw it away. */ + } - 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. + if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, + &fi->i, filename_ptr, functionname_ptr, + line_ptr)) + { + msec->flags = origflags; + return TRUE; + } - Any such jsr insn can be replaced by a bsr if it is in range. + msec->flags = origflags; + } - This would mean that we'd have to _add_ relocations, the pain of - which gives one pause. */ + /* Fall back on the generic ELF find_nearest_line routine. */ - return TRUE; + return _bfd_elf_find_nearest_line (abfd, symbols, section, offset, + filename_ptr, functionname_ptr, + line_ptr, discriminator_ptr); } + +/* Structure used to pass information to alpha_elf_output_extsym. */ -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; +struct extsym_info { - 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 + bfd *abfd; + struct bfd_link_info *info; + struct ecoff_debug_info *debug; + const struct ecoff_debug_swap *swap; + bfd_boolean failed; +}; - which would indeed be the most efficient way to implement this. */ +static bfd_boolean +elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry *h, void * data) +{ + struct extsym_info *einfo = (struct extsym_info *) data; + bfd_boolean strip; + asection *sec, *output_section; - return TRUE; + if (h->root.indx == -2) + strip = FALSE; + else if ((h->root.def_dynamic + || h->root.ref_dynamic + || h->root.root.type == bfd_link_hash_new) + && !h->root.def_regular + && !h->root.ref_regular) + strip = TRUE; + else if (einfo->info->strip == strip_all + || (einfo->info->strip == strip_some + && bfd_hash_lookup (einfo->info->keep_hash, + h->root.root.root.string, + FALSE, FALSE) == NULL)) + strip = TRUE; + else + strip = FALSE; - disp = symval - info->gp; - if (disp < -0x8000 || disp >= 0x8000) + if (strip) 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 + if (h->esym.ifd == -2) { - /* Adjust the low instruction to reference GP directly. */ + h->esym.jmptbl = 0; + h->esym.cobol_main = 0; + h->esym.weakext = 0; + h->esym.reserved = 0; + h->esym.ifd = ifdNil; + h->esym.asym.value = 0; + h->esym.asym.st = stGlobal; - 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; + if (h->root.root.type != bfd_link_hash_defined + && h->root.root.type != bfd_link_hash_defweak) + h->esym.asym.sc = scAbs; + else + { + const char *name; - irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), - R_ALPHA_GPREL16); - info->changed_relocs = TRUE; - } + sec = h->root.root.u.def.section; + output_section = sec->output_section; - return TRUE; -} + /* When making a shared library and symbol h is the one from + the another shared library, OUTPUT_SECTION may be null. */ + if (output_section == NULL) + h->esym.asym.sc = scUndefined; + else + { + name = bfd_section_name (output_section->owner, output_section); -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; + if (strcmp (name, ".text") == 0) + h->esym.asym.sc = scText; + else if (strcmp (name, ".data") == 0) + h->esym.asym.sc = scData; + else if (strcmp (name, ".sdata") == 0) + h->esym.asym.sc = scSData; + else if (strcmp (name, ".rodata") == 0 + || strcmp (name, ".rdata") == 0) + h->esym.asym.sc = scRData; + else if (strcmp (name, ".bss") == 0) + h->esym.asym.sc = scBss; + else if (strcmp (name, ".sbss") == 0) + h->esym.asym.sc = scSBss; + else if (strcmp (name, ".init") == 0) + h->esym.asym.sc = scInit; + else if (strcmp (name, ".fini") == 0) + h->esym.asym.sc = scFini; + else + h->esym.asym.sc = scAbs; + } + } - /* 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; + h->esym.asym.reserved = 0; + h->esym.asym.index = indexNil; + } - /* 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; + if (h->root.root.type == bfd_link_hash_common) + h->esym.asym.value = h->root.root.u.c.size; + else if (h->root.root.type == bfd_link_hash_defined + || h->root.root.type == bfd_link_hash_defweak) + { + if (h->esym.asym.sc == scCommon) + h->esym.asym.sc = scBss; + else if (h->esym.asym.sc == scSCommon) + h->esym.asym.sc = scSBss; - 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; + sec = h->root.root.u.def.section; + output_section = sec->output_section; + if (output_section != NULL) + h->esym.asym.value = (h->root.root.u.def.value + + sec->output_offset + + output_section->vma); + else + h->esym.asym.value = 0; + } - /* 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]) + if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, + h->root.root.root.string, + &h->esym)) { - bfd_byte *tmp = pos[0]; - pos[0] = pos[1]; - pos[1] = tmp; + einfo->failed = TRUE; + return FALSE; } - 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 + return TRUE; +} + +/* Search for and possibly create a got entry. */ - as appropriate. */ +static struct alpha_elf_got_entry * +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; - use_gottprel = FALSE; - new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : 0; - switch (!dynamic && !info->link_info->shared) + if (h) + slot = &h->got_entries; + else { - 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; + /* This is a local .got entry -- record for merge. */ - 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]); + struct alpha_elf_got_entry **local_got_entries; - 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]); + local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; + if (!local_got_entries) + { + bfd_size_type size; + Elf_Internal_Shdr *symtab_hdr; - 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 */ + symtab_hdr = &elf_tdata(abfd)->symtab_hdr; + size = symtab_hdr->sh_info; + size *= sizeof (struct alpha_elf_got_entry *); - default: - use_gottprel = TRUE; + local_got_entries + = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size); + if (!local_got_entries) + return NULL; - 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]); + alpha_elf_tdata (abfd)->local_got_entries = local_got_entries; + } - 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; + slot = &local_got_entries[r_symndx]; } - 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]); + for (gotent = *slot; gotent ; gotent = gotent->next) + if (gotent->gotobj == abfd + && gotent->reloc_type == r_type + && gotent->addend == r_addend) + break; - bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]); + if (!gotent) + { + int entry_size; + bfd_size_type amt; - irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); - gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + amt = sizeof (struct alpha_elf_got_entry); + gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt); + if (!gotent) + return NULL; - 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); + gotent->gotobj = abfd; + gotent->addend = r_addend; + gotent->got_offset = -1; + gotent->plt_offset = -1; + gotent->use_count = 1; + gotent->reloc_type = r_type; + gotent->reloc_done = 0; + gotent->reloc_xlated = 0; - info->changed_contents = TRUE; - info->changed_relocs = TRUE; + gotent->next = *slot; + *slot = gotent; - /* 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; + entry_size = alpha_got_entry_size (r_type); + alpha_elf_tdata (abfd)->total_got_size += entry_size; + if (!h) + alpha_elf_tdata(abfd)->local_got_size += entry_size; } + else + gotent->use_count += 1; - /* 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; + return 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; +static bfd_boolean +elf64_alpha_want_plt (struct alpha_elf_link_hash_entry *ah) +{ + return ((ah->root.type == STT_FUNC + || ah->root.root.type == bfd_link_hash_undefweak + || ah->root.root.type == bfd_link_hash_undefined) + && (ah->flags & ALPHA_ELF_LINK_HASH_LU_PLT) != 0 + && (ah->flags & ~ALPHA_ELF_LINK_HASH_LU_PLT) == 0); +} - tprel_gotent->next = *info->first_gotent; - *info->first_gotent = tprel_gotent; +/* Whether to sort relocs output by ld -r or ld --emit-relocs, by r_offset. + Don't do so for code sections. We want to keep ordering of LITERAL/LITUSE + as is. On the other hand, elf-eh-frame.c processing requires .eh_frame + relocs to be sorted. */ - 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; - } +static bfd_boolean +elf64_alpha_sort_relocs_p (asection *sec) +{ + return (sec->flags & SEC_CODE) == 0; +} - tprel_gotent->use_count = 1; - tprel_gotent->reloc_type = R_ALPHA_GOTTPREL; - } - } - return TRUE; -} +/* Handle dynamic relocations when doing an Alpha ELF link. */ 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; +elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs) { + bfd *dynobj; + asection *sreloc; 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; + struct alpha_elf_link_hash_entry **sym_hashes; + const Elf_Internal_Rela *rel, *relend; + bfd_size_type amt; - /* We are not currently changing any sizes, so only one pass. */ - *again = FALSE; + if (bfd_link_relocatable (info)) + return TRUE; - if (link_info->relocatable - || (sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) - || sec->reloc_count == 0) + /* Don't do anything special with non-loaded, non-alloced sections. + In particular, any relocs in such sections should not affect GOT + and PLT reference counting (ie. we don't allow them to create GOT + or PLT entries), there's no possibility or desire to optimize TLS + relocs, and there's not much point in propagating relocs to shared + libs that the dynamic linker won't relocate. */ + if ((sec->flags & SEC_ALLOC) == 0) return TRUE; - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; + BFD_ASSERT (is_alpha_elf (abfd)); - /* 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; + dynobj = elf_hash_table (info)->dynobj; + if (dynobj == NULL) + elf_hash_table (info)->dynobj = dynobj = abfd; + + sreloc = NULL; + symtab_hdr = &elf_symtab_hdr (abfd); + sym_hashes = alpha_elf_sym_hashes (abfd); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; ++rel) + { + enum { + NEED_GOT = 1, + NEED_GOT_ENTRY = 2, + NEED_DYNREL = 4 + }; + + unsigned long r_symndx, r_type; + struct alpha_elf_link_hash_entry *h; + unsigned int gotent_flags; + bfd_boolean maybe_dynamic; + unsigned int need; + bfd_vma addend; - 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; + r_symndx = ELF64_R_SYM (rel->r_info); + if (r_symndx < symtab_hdr->sh_info) + h = NULL; + else + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - /* 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); - } + 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; - /* 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; - } + /* PR15323, ref flags aren't set for references in the same + object. */ + h->root.root.non_ir_ref = 1; + h->root.ref_regular = 1; + } - 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); + /* We can only get preliminary data on whether a symbol is + locally or externally defined, as not all of the input files + have yet been processed. Do something with what we know, as + this may help reduce memory usage and processing time later. */ + maybe_dynamic = FALSE; + if (h && ((bfd_link_pic (info) + && (!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; + + need = 0; + gotent_flags = 0; + r_type = ELF64_R_TYPE (rel->r_info); + addend = rel->r_addend; - /* Early exit for unhandled or unrelaxable relocations. */ switch (r_type) { case R_ALPHA_LITERAL: + need = NEED_GOT | NEED_GOT_ENTRY; + + /* Remember how this literal is used from its LITUSEs. + This will be important when it comes to decide if we can + create a .plt entry for a function symbol. */ + while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE) + if (rel->r_addend >= 1 && rel->r_addend <= 6) + gotent_flags |= 1 << rel->r_addend; + --rel; + + /* No LITUSEs -- presumably the address is used somehow. */ + if (gotent_flags == 0) + gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR; + break; + + case R_ALPHA_GPDISP: + case R_ALPHA_GPREL16: + case R_ALPHA_GPREL32: case R_ALPHA_GPRELHIGH: case R_ALPHA_GPRELLOW: - case R_ALPHA_GOTDTPREL: - case R_ALPHA_GOTTPREL: - case R_ALPHA_TLSGD: + case R_ALPHA_BRSGP: + need = NEED_GOT; 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; + case R_ALPHA_REFLONG: + case R_ALPHA_REFQUAD: + if (bfd_link_pic (info) || maybe_dynamic) + need = NEED_DYNREL; 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; + case R_ALPHA_TLSLDM: + /* The symbol for a TLSLDM reloc is ignored. Collapse the + reloc to the STN_UNDEF (0) symbol so that they all match. */ + r_symndx = STN_UNDEF; + h = 0; + maybe_dynamic = FALSE; + /* FALLTHRU */ - /* 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; - } + case R_ALPHA_TLSGD: + case R_ALPHA_GOTDTPREL: + need = NEED_GOT | NEED_GOT_ENTRY; + break; - isym = isymbuf + r_symndx; + case R_ALPHA_GOTTPREL: + need = NEED_GOT | NEED_GOT_ENTRY; + gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE; + if (bfd_link_pic (info)) + info->flags |= DF_STATIC_TLS; + break; - /* 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 + case R_ALPHA_TPREL64: + if (bfd_link_dll (info)) { - 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->flags |= DF_STATIC_TLS; + need = NEED_DYNREL; } + else if (maybe_dynamic) + need = NEED_DYNREL; + break; + } - info.h = NULL; - info.other = isym->st_other; - if (local_got_entries) - info.first_gotent = &local_got_entries[r_symndx]; - else + if (need & NEED_GOT) + { + if (alpha_elf_tdata(abfd)->gotobj == NULL) { - info.first_gotent = &info.gotent; - info.gotent = NULL; + if (!elf64_alpha_create_got_section (abfd, info)) + return FALSE; } } - else + + if (need & NEED_GOT_ENTRY) { - unsigned long indx; - struct alpha_elf_link_hash_entry *h; + struct alpha_elf_got_entry *gotent; - indx = r_symndx - symtab_hdr->sh_info; - h = alpha_elf_sym_hashes (abfd)[indx]; - BFD_ASSERT (h != NULL); + gotent = get_got_entry (abfd, h, r_type, r_symndx, addend); + if (!gotent) + return FALSE; - 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 (gotent_flags) + { + gotent->flags |= gotent_flags; + if (h) + { + gotent_flags |= h->flags; + h->flags = gotent_flags; - /* If the symbol is undefined, we can't do anything with it. */ - if (h->root.root.type == bfd_link_hash_undefweak - || h->root.root.type == bfd_link_hash_undefined) - continue; + /* Make a guess as to whether a .plt entry is needed. */ + /* ??? It appears that we won't make it into + adjust_dynamic_symbol for symbols that remain + totally undefined. Copying this check here means + we can create a plt entry for them too. */ + h->root.needs_plt + = (maybe_dynamic && elf64_alpha_want_plt (h)); + } + } + } - /* If the symbol isn't defined in the current module, again - we can't do anything. */ - if (!h->root.def_regular) + if (need & NEED_DYNREL) + { + /* We need to create the section here now whether we eventually + use it or not so that it gets mapped to an output section by + the linker. If not used, we'll kill it in size_dynamic_sections. */ + if (sreloc == NULL) { - /* 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; + sreloc = _bfd_elf_make_dynamic_reloc_section + (sec, dynobj, 3, abfd, /*rela?*/ TRUE); + + if (sreloc == NULL) + return FALSE; } - else + + if (h) { - info.tsec = h->root.root.u.def.section; - symval = h->root.root.u.def.value; - } + /* Since we havn't seen all of the input symbols yet, we + don't know whether we'll actually need a dynamic relocation + entry for this reloc. So make a record of it. Once we + find out if this thing needs dynamic relocation we'll + expand the relocation sections by the appropriate amount. */ - info.h = h; - info.other = h->root.other; - info.first_gotent = &h->got_entries; - } + struct alpha_elf_reloc_entry *rent; - /* 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; + for (rent = h->reloc_entries; rent; rent = rent->next) + if (rent->rtype == r_type && rent->srel == sreloc) + break; - symval += info.tsec->output_section->vma + info.tsec->output_offset; - symval += irel->r_addend; + if (!rent) + { + amt = sizeof (struct alpha_elf_reloc_entry); + rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt); + if (!rent) + return FALSE; - switch (r_type) - { - case R_ALPHA_LITERAL: - BFD_ASSERT(info.gotent != NULL); + rent->srel = sreloc; + rent->rtype = r_type; + rent->count = 1; + rent->reltext = (sec->flags & SEC_READONLY) != 0; - /* 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; + rent->next = h->reloc_entries; + h->reloc_entries = rent; + } + else + rent->count++; } - else + else if (bfd_link_pic (info)) { - if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) - goto error_return; + /* If this is a shared library, and the section is to be + loaded into memory, we need a RELATIVE reloc. */ + sreloc->size += sizeof (Elf64_External_Rela); + if (sec->flags & SEC_READONLY) + info->flags |= DF_TEXTREL; } - 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; + return TRUE; +} - 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; +/* Return the section that should be marked against GC for a given + relocation. */ - 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; - } +static asection * +elf64_alpha_gc_mark_hook (asection *sec, struct bfd_link_info *info, + Elf_Internal_Rela *rel, + struct elf_link_hash_entry *h, Elf_Internal_Sym *sym) +{ + /* These relocations don't really reference a symbol. Instead we store + extra data in their addend slot. Ignore the symbol. */ + switch (ELF64_R_TYPE (rel->r_info)) + { + case R_ALPHA_LITUSE: + case R_ALPHA_GPDISP: + case R_ALPHA_HINT: + return NULL; } - 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; + return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); +} - if (isymbuf != NULL - && symtab_hdr->contents != (unsigned char *) isymbuf) +/* Update the got entry reference counts for the section being removed. */ + +static bfd_boolean +elf64_alpha_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs) +{ + Elf_Internal_Shdr *symtab_hdr; + struct alpha_elf_link_hash_entry **sym_hashes; + const Elf_Internal_Rela *rel, *relend; + + if (bfd_link_relocatable (info)) + return TRUE; + + symtab_hdr = &elf_symtab_hdr (abfd); + sym_hashes = alpha_elf_sym_hashes (abfd); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; rel++) { - if (!link_info->keep_memory) - free (isymbuf); - else + unsigned long r_symndx, r_type; + struct alpha_elf_link_hash_entry *h = NULL; + struct alpha_elf_got_entry *gotent; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) { - /* Cache the symbols for elf_link_input_bfd. */ - symtab_hdr->contents = (unsigned char *) isymbuf; + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + 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 (info.contents != NULL - && elf_section_data (sec)->this_hdr.contents != info.contents) - { - if (!info.changed_contents && !link_info->keep_memory) - free (info.contents); - else + r_type = ELF64_R_TYPE (rel->r_info); + switch (r_type) { - /* Cache the section contents for elf_link_input_bfd. */ - elf_section_data (sec)->this_hdr.contents = info.contents; - } - } + case R_ALPHA_LITERAL: + /* ??? Ignore re-computation of gotent_flags. We're not + carrying a use-count for each bit in that mask. */ - if (elf_section_data (sec)->relocs != internal_relocs) - { - if (!info.changed_relocs) - free (internal_relocs); - else - elf_section_data (sec)->relocs = internal_relocs; - } + case R_ALPHA_TLSGD: + case R_ALPHA_GOTDTPREL: + case R_ALPHA_GOTTPREL: + /* Fetch the got entry from the tables. */ + gotent = get_got_entry (abfd, h, r_type, r_symndx, rel->r_addend); + + /* The got entry *must* exist, since we should have created it + before during check_relocs. Also note that get_got_entry + assumed this was going to be another use, and so incremented + the use count again. Thus the use count must be at least the + one real use and the "use" we just added. */ + if (gotent == NULL || gotent->use_count < 2) + { + abort (); + return FALSE; + } + gotent->use_count -= 2; + break; - *again = info.changed_contents || info.changed_relocs; + default: + break; + } + } 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 */ -#define PLT_HEADER_WORD2 (bfd_vma) 0xa77b000c /* ldq $27,12($27) */ -#define PLT_HEADER_WORD3 (bfd_vma) 0x47ff041f /* nop */ -#define PLT_HEADER_WORD4 (bfd_vma) 0x6b7b0000 /* jmp $27,($27) */ - -#define PLT_ENTRY_SIZE 12 -#define PLT_ENTRY_WORD1 0xc3800000 /* br $28, plt0 */ -#define PLT_ENTRY_WORD2 0 -#define PLT_ENTRY_WORD3 0 - -#define MAX_GOT_SIZE (64*1024) -#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so" - -/* Handle an Alpha specific section when reading an object file. This - is called when bfd_section_from_shdr finds a section with an unknown - type. - FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure - how to. */ +/* Adjust a symbol defined by a dynamic object and referenced by a + regular object. The current definition is in some section of the + dynamic object, but we're not including those sections. We have to + change the definition to something the rest of the link can + understand. */ static bfd_boolean -elf64_alpha_section_from_shdr (bfd *abfd, - Elf_Internal_Shdr *hdr, - const char *name, - int shindex) +elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h) { - asection *newsect; + bfd *dynobj; + asection *s; + struct alpha_elf_link_hash_entry *ah; - /* There ought to be a place to keep ELF backend specific flags, but - at the moment there isn't one. We just keep track of the - sections by their name, instead. Fortunately, the ABI gives - suggested names for all the MIPS specific sections, so we will - probably get away with this. */ - switch (hdr->sh_type) + dynobj = elf_hash_table(info)->dynobj; + ah = (struct alpha_elf_link_hash_entry *)h; + + /* Now that we've seen all of the input symbols, finalize our decision + about whether this symbol should get a .plt entry. Irritatingly, it + is common for folk to leave undefined symbols in shared libraries, + and they still expect lazy binding; accept undefined symbols in lieu + of STT_FUNC. */ + if (alpha_elf_dynamic_symbol_p (h, info) && elf64_alpha_want_plt (ah)) { - case SHT_ALPHA_DEBUG: - if (strcmp (name, ".mdebug") != 0) + h->needs_plt = TRUE; + + s = bfd_get_linker_section (dynobj, ".plt"); + if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info)) return FALSE; - break; - default: - return FALSE; - } - if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) - return FALSE; - newsect = hdr->bfd_section; + /* We need one plt entry per got subsection. Delay allocation of + the actual plt entries until size_plt_section, called from + size_dynamic_sections or during relaxation. */ - if (hdr->sh_type == SHT_ALPHA_DEBUG) + return TRUE; + } + else + h->needs_plt = FALSE; + + /* If this is a weak symbol, and there is a real definition, the + processor independent code will have arranged for us to see the + real definition first, and we can just use the same value. */ + if (h->u.weakdef != NULL) { - if (! bfd_set_section_flags (abfd, newsect, - (bfd_get_section_flags (abfd, newsect) - | SEC_DEBUGGING))) - return FALSE; + BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined + || h->u.weakdef->root.type == bfd_link_hash_defweak); + h->root.u.def.section = h->u.weakdef->root.u.def.section; + h->root.u.def.value = h->u.weakdef->root.u.def.value; + return TRUE; } + /* This is a reference to a symbol defined by a dynamic object which + is not a function. The Alpha, since it uses .got entries for all + symbols even in regular objects, does not need the hackery of a + .dynbss section and COPY dynamic relocations. */ + return TRUE; } -/* Convert Alpha specific section flags to bfd internal section flags. */ +/* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */ -static bfd_boolean -elf64_alpha_section_flags (flags, hdr) - flagword *flags; - const Elf_Internal_Shdr *hdr; +static void +elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry *h, + const Elf_Internal_Sym *isym, + bfd_boolean definition, + bfd_boolean dynamic) { - if (hdr->sh_flags & SHF_ALPHA_GPREL) - *flags |= SEC_SMALL_DATA; - - return TRUE; + if (!dynamic && definition) + h->other = ((h->other & ELF_ST_VISIBILITY (-1)) + | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); } -/* Set the correct type for an Alpha ELF section. We do this by the - section name, which is a hack, but ought to work. */ +/* Symbol versioning can create new symbols, and make our old symbols + indirect to the new ones. Consolidate the got and reloc information + in these situations. */ -static bfd_boolean -elf64_alpha_fake_sections (abfd, hdr, sec) - bfd *abfd; - Elf_Internal_Shdr *hdr; - asection *sec; +static void +elf64_alpha_copy_indirect_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *dir, + struct elf_link_hash_entry *ind) { - register const char *name; + struct alpha_elf_link_hash_entry *hi + = (struct alpha_elf_link_hash_entry *) ind; + struct alpha_elf_link_hash_entry *hs + = (struct alpha_elf_link_hash_entry *) dir; - name = bfd_get_section_name (abfd, sec); + /* Do the merging in the superclass. */ + _bfd_elf_link_hash_copy_indirect(info, dir, ind); - if (strcmp (name, ".mdebug") == 0) - { - hdr->sh_type = SHT_ALPHA_DEBUG; - /* In a shared object on Irix 5.3, the .mdebug section has an - entsize of 0. FIXME: Does this matter? */ - if ((abfd->flags & DYNAMIC) != 0 ) - hdr->sh_entsize = 0; - else - hdr->sh_entsize = 1; - } - else if ((sec->flags & SEC_SMALL_DATA) - || strcmp (name, ".sdata") == 0 - || strcmp (name, ".sbss") == 0 - || strcmp (name, ".lit4") == 0 - || strcmp (name, ".lit8") == 0) - hdr->sh_flags |= SHF_ALPHA_GPREL; + /* Merge the flags. Whee. */ + hs->flags |= hi->flags; - return TRUE; -} + /* ??? It's unclear to me what's really supposed to happen when + "merging" defweak and defined symbols, given that we don't + actually throw away the defweak. This more-or-less copies + the logic related to got and plt entries in the superclass. */ + if (ind->root.type != bfd_link_hash_indirect) + return; -/* Hook called by the linker routine which adds symbols from an object - file. We use it to put .comm items in .sbss, and not .bss. */ + /* Merge the .got entries. Cannibalize the old symbol's list in + doing so, since we don't need it anymore. */ -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; -{ - if (sym->st_shndx == SHN_COMMON - && !info->relocatable - && sym->st_size <= elf_gp_size (abfd)) + if (hs->got_entries == NULL) + hs->got_entries = hi->got_entries; + else { - /* Common symbols less than or equal to -G nn bytes are - automatically put into .sbss. */ + struct alpha_elf_got_entry *gi, *gs, *gin, *gsh; - asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); + gsh = hs->got_entries; + for (gi = hi->got_entries; gi ; gi = gin) + { + gin = gi->next; + for (gs = gsh; gs ; gs = gs->next) + if (gi->gotobj == gs->gotobj + && gi->reloc_type == gs->reloc_type + && gi->addend == gs->addend) + { + gi->use_count += gs->use_count; + goto got_found; + } + gi->next = hs->got_entries; + hs->got_entries = gi; + got_found:; + } + } + hi->got_entries = NULL; - if (scomm == NULL) + /* And similar for the reloc entries. */ + + if (hs->reloc_entries == NULL) + hs->reloc_entries = hi->reloc_entries; + else + { + struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh; + + rsh = hs->reloc_entries; + for (ri = hi->reloc_entries; ri ; ri = rin) { - scomm = bfd_make_section_with_flags (abfd, ".scommon", - (SEC_ALLOC - | SEC_IS_COMMON - | SEC_LINKER_CREATED)); - if (scomm == NULL) - return FALSE; + rin = ri->next; + for (rs = rsh; rs ; rs = rs->next) + if (ri->rtype == rs->rtype && ri->srel == rs->srel) + { + rs->count += ri->count; + goto found_reloc; + } + ri->next = hs->reloc_entries; + hs->reloc_entries = ri; + found_reloc:; } - - *secp = scomm; - *valp = sym->st_size; } - - return TRUE; + hi->reloc_entries = NULL; } -/* Create the .got section. */ +/* Is it possible to merge two object file's .got tables? */ static bfd_boolean -elf64_alpha_create_got_section(abfd, info) - bfd *abfd; - struct bfd_link_info *info ATTRIBUTE_UNUSED; +elf64_alpha_can_merge_gots (bfd *a, bfd *b) { - asection *s; + int total = alpha_elf_tdata (a)->total_got_size; + bfd *bsub; - if ((s = bfd_get_section_by_name (abfd, ".got"))) - { - /* Check for a non-linker created .got? */ - if (alpha_elf_tdata (abfd)->got == NULL) - alpha_elf_tdata (abfd)->got = s; - return TRUE; - } + /* Trivial quick fallout test. */ + if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE) + return TRUE; - s = bfd_make_section_with_flags (abfd, ".got", (SEC_ALLOC | SEC_LOAD - | SEC_HAS_CONTENTS - | SEC_IN_MEMORY - | SEC_LINKER_CREATED)); - if (s == NULL - || !bfd_set_section_alignment (abfd, s, 3)) + /* By their nature, local .got entries cannot be merged. */ + if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE) return FALSE; - alpha_elf_tdata (abfd)->got = s; + /* Failing the common trivial comparison, we must effectively + perform the merge. Not actually performing the merge means that + we don't have to store undo information in case we fail. */ + for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) + { + struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub); + Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr; + int i, n; + + n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; + for (i = 0; i < n; ++i) + { + struct alpha_elf_got_entry *ae, *be; + struct alpha_elf_link_hash_entry *h; + + h = hashes[i]; + 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; + + for (be = h->got_entries; be ; be = be->next) + { + if (be->use_count == 0) + continue; + if (be->gotobj != b) + continue; + + for (ae = h->got_entries; ae ; ae = ae->next) + if (ae->gotobj == a + && ae->reloc_type == be->reloc_type + && ae->addend == be->addend) + goto global_found; + + total += alpha_got_entry_size (be->reloc_type); + if (total > MAX_GOT_SIZE) + return FALSE; + global_found:; + } + } + } return TRUE; } -/* Create all the dynamic sections. */ +/* Actually merge two .got tables. */ -static bfd_boolean -elf64_alpha_create_dynamic_sections (abfd, info) - bfd *abfd; - struct bfd_link_info *info; +static void +elf64_alpha_merge_gots (bfd *a, bfd *b) { - asection *s; - struct elf_link_hash_entry *h; - struct bfd_link_hash_entry *bh; + int total = alpha_elf_tdata (a)->total_got_size; + bfd *bsub; - /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */ + /* Remember local expansion. */ + { + int e = alpha_elf_tdata (b)->local_got_size; + total += e; + alpha_elf_tdata (a)->local_got_size += e; + } - s = bfd_make_section_with_flags (abfd, ".plt", - (SEC_ALLOC | SEC_LOAD - | SEC_HAS_CONTENTS - | SEC_IN_MEMORY - | SEC_LINKER_CREATED - | SEC_CODE)); - if (s == NULL - || ! bfd_set_section_alignment (abfd, s, 3)) - return FALSE; + for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) + { + struct alpha_elf_got_entry **local_got_entries; + struct alpha_elf_link_hash_entry **hashes; + Elf_Internal_Shdr *symtab_hdr; + int i, n; - /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the - .plt section. */ - bh = NULL; - if (! (_bfd_generic_link_add_one_symbol - (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, - (bfd_vma) 0, (const char *) NULL, FALSE, - get_elf_backend_data (abfd)->collect, &bh))) - return FALSE; - h = (struct elf_link_hash_entry *) bh; - h->def_regular = 1; - h->type = STT_OBJECT; + /* Let the local .got entries know they are part of a new subsegment. */ + local_got_entries = alpha_elf_tdata (bsub)->local_got_entries; + if (local_got_entries) + { + n = elf_tdata (bsub)->symtab_hdr.sh_info; + for (i = 0; i < n; ++i) + { + struct alpha_elf_got_entry *ent; + for (ent = local_got_entries[i]; ent; ent = ent->next) + ent->gotobj = a; + } + } - if (info->shared - && ! bfd_elf_link_record_dynamic_symbol (info, h)) - return FALSE; + /* Merge the global .got entries. */ + hashes = alpha_elf_sym_hashes (bsub); + symtab_hdr = &elf_tdata (bsub)->symtab_hdr; - s = bfd_make_section_with_flags (abfd, ".rela.plt", - (SEC_ALLOC | SEC_LOAD - | SEC_HAS_CONTENTS - | SEC_IN_MEMORY - | SEC_LINKER_CREATED - | SEC_READONLY)); - if (s == NULL - || ! bfd_set_section_alignment (abfd, s, 3)) - return FALSE; + n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; + for (i = 0; i < n; ++i) + { + struct alpha_elf_got_entry *ae, *be, **pbe, **start; + struct alpha_elf_link_hash_entry *h; - /* We may or may not have created a .got section for this object, but - we definitely havn't done the rest of the work. */ + h = hashes[i]; + 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 (!elf64_alpha_create_got_section (abfd, info)) - return FALSE; + pbe = start = &h->got_entries; + while ((be = *pbe) != NULL) + { + if (be->use_count == 0) + { + *pbe = be->next; + memset (be, 0xa5, sizeof (*be)); + goto kill; + } + if (be->gotobj != b) + goto next; - s = bfd_make_section_with_flags (abfd, ".rela.got", - (SEC_ALLOC | SEC_LOAD - | SEC_HAS_CONTENTS - | SEC_IN_MEMORY - | SEC_LINKER_CREATED - | SEC_READONLY)); - if (s == NULL - || !bfd_set_section_alignment (abfd, s, 3)) - return FALSE; + for (ae = *start; ae ; ae = ae->next) + if (ae->gotobj == a + && ae->reloc_type == be->reloc_type + && ae->addend == be->addend) + { + ae->flags |= be->flags; + ae->use_count += be->use_count; + *pbe = be->next; + memset (be, 0xa5, sizeof (*be)); + goto kill; + } + be->gotobj = a; + total += alpha_got_entry_size (be->reloc_type); - /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the - dynobj's .got section. We don't do this in the linker script - because we don't want to define the symbol if we are not creating - a global offset table. */ - bh = NULL; - if (!(_bfd_generic_link_add_one_symbol - (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, - alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) NULL, - FALSE, get_elf_backend_data (abfd)->collect, &bh))) - return FALSE; - h = (struct elf_link_hash_entry *) bh; - h->def_regular = 1; - h->type = STT_OBJECT; + next:; + pbe = &be->next; + kill:; + } + } - if (info->shared - && ! bfd_elf_link_record_dynamic_symbol (info, h)) - return FALSE; + alpha_elf_tdata (bsub)->gotobj = a; + } + alpha_elf_tdata (a)->total_got_size = total; - elf_hash_table (info)->hgot = h; + /* Merge the two in_got chains. */ + { + bfd *next; - return TRUE; + bsub = a; + while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL) + bsub = next; + + alpha_elf_tdata (bsub)->in_got_link_next = b; + } } - -/* Read ECOFF debugging information from a .mdebug section into a - ecoff_debug_info structure. */ + +/* Calculate the offsets for the got entries. */ static bfd_boolean -elf64_alpha_read_ecoff_info (abfd, section, debug) - bfd *abfd; - asection *section; - struct ecoff_debug_info *debug; +elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h, + void * arg ATTRIBUTE_UNUSED) { - HDRR *symhdr; - const struct ecoff_debug_swap *swap; - char *ext_hdr = NULL; - - swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; - memset (debug, 0, sizeof (*debug)); - - ext_hdr = (char *) bfd_malloc (swap->external_hdr_size); - if (ext_hdr == NULL && swap->external_hdr_size != 0) - goto error_return; - - if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, - swap->external_hdr_size)) - goto error_return; + struct alpha_elf_got_entry *gotent; - symhdr = &debug->symbolic_header; - (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); + for (gotent = h->got_entries; gotent; gotent = gotent->next) + if (gotent->use_count > 0) + { + struct alpha_elf_obj_tdata *td; + bfd_size_type *plge; - /* The symbolic header contains absolute file offsets and sizes to - read. */ -#define READ(ptr, offset, count, size, type) \ - if (symhdr->count == 0) \ - debug->ptr = NULL; \ - else \ - { \ - bfd_size_type amt = (bfd_size_type) size * symhdr->count; \ - debug->ptr = (type) bfd_malloc (amt); \ - if (debug->ptr == NULL) \ - goto error_return; \ - if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ - || bfd_bread (debug->ptr, amt, abfd) != amt) \ - goto error_return; \ - } + td = alpha_elf_tdata (gotent->gotobj); + plge = &td->got->size; + gotent->got_offset = *plge; + *plge += alpha_got_entry_size (gotent->reloc_type); + } - READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); - READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR); - READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR); - READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR); - READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR); - READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), - union aux_ext *); - READ (ss, cbSsOffset, issMax, sizeof (char), char *); - READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); - READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR); - READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR); - READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR); -#undef READ + return TRUE; +} - debug->fdr = NULL; +static void +elf64_alpha_calc_got_offsets (struct bfd_link_info *info) +{ + bfd *i, *got_list; + struct alpha_elf_link_hash_table * htab; - return TRUE; + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return; + got_list = htab->got_list; - error_return: - if (ext_hdr != NULL) - free (ext_hdr); - if (debug->line != NULL) - free (debug->line); - if (debug->external_dnr != NULL) - free (debug->external_dnr); - if (debug->external_pdr != NULL) - free (debug->external_pdr); - if (debug->external_sym != NULL) - free (debug->external_sym); - if (debug->external_opt != NULL) - free (debug->external_opt); - if (debug->external_aux != NULL) - free (debug->external_aux); - if (debug->ss != NULL) - free (debug->ss); - if (debug->ssext != NULL) - free (debug->ssext); - if (debug->external_fdr != NULL) - free (debug->external_fdr); - if (debug->external_rfd != NULL) - free (debug->external_rfd); - if (debug->external_ext != NULL) - free (debug->external_ext); - return FALSE; -} + /* First, zero out the .got sizes, as we may be recalculating the + .got after optimizing it. */ + for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) + alpha_elf_tdata(i)->got->size = 0; -/* Alpha ELF local labels start with '$'. */ + /* Next, fill in the offsets for all the global entries. */ + alpha_elf_link_hash_traverse (htab, + elf64_alpha_calc_got_offsets_for_symbol, + NULL); -static bfd_boolean -elf64_alpha_is_local_label_name (abfd, name) - bfd *abfd ATTRIBUTE_UNUSED; - const char *name; -{ - return name[0] == '$'; -} + /* Finally, fill in the offsets for the local entries. */ + for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) + { + bfd_size_type got_offset = alpha_elf_tdata(i)->got->size; + bfd *j; -/* Alpha ELF follows MIPS ELF in using a special find_nearest_line - routine in order to handle the ECOFF debugging information. We - still call this mips_elf_find_line because of the slot - find_line_info in elf_obj_tdata is declared that way. */ + for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) + { + struct alpha_elf_got_entry **local_got_entries, *gotent; + int k, n; -struct mips_elf_find_line -{ - struct ecoff_debug_info d; - struct ecoff_find_line i; -}; + local_got_entries = alpha_elf_tdata(j)->local_got_entries; + if (!local_got_entries) + continue; + + for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) + for (gotent = local_got_entries[k]; gotent; gotent = gotent->next) + if (gotent->use_count > 0) + { + gotent->got_offset = got_offset; + got_offset += alpha_got_entry_size (gotent->reloc_type); + } + } + + alpha_elf_tdata(i)->got->size = got_offset; + } +} + +/* Constructs the gots. */ 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_size_got_sections (struct bfd_link_info *info, + bfd_boolean may_merge) { - asection *msec; + bfd *i, *got_list, *cur_got_obj = NULL; + struct alpha_elf_link_hash_table * htab; - if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, - filename_ptr, functionname_ptr, - line_ptr, 0, - &elf_tdata (abfd)->dwarf2_find_line_info)) - return TRUE; + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return FALSE; + got_list = htab->got_list; - msec = bfd_get_section_by_name (abfd, ".mdebug"); - if (msec != NULL) + /* On the first time through, pretend we have an existing got list + consisting of all of the input files. */ + if (got_list == NULL) { - flagword origflags; - struct mips_elf_find_line *fi; - const struct ecoff_debug_swap * const swap = - get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; + for (i = info->input_bfds; i ; i = i->link.next) + { + bfd *this_got; - /* If we are called during a link, alpha_elf_final_link may have - cleared the SEC_HAS_CONTENTS field. We force it back on here - if appropriate (which it normally will be). */ - origflags = msec->flags; - if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS) - msec->flags |= SEC_HAS_CONTENTS; + if (! is_alpha_elf (i)) + continue; - fi = elf_tdata (abfd)->find_line_info; - if (fi == NULL) - { - bfd_size_type external_fdr_size; - char *fraw_src; - char *fraw_end; - struct fdr *fdr_ptr; - bfd_size_type amt = sizeof (struct mips_elf_find_line); + this_got = alpha_elf_tdata (i)->gotobj; + if (this_got == NULL) + continue; - fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt); - if (fi == NULL) - { - msec->flags = origflags; - return FALSE; - } + /* We are assuming no merging has yet occurred. */ + BFD_ASSERT (this_got == i); - if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d)) + if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE) { - msec->flags = origflags; + /* Yikes! A single object file has too many entries. */ + (*_bfd_error_handler) + (_("%B: .got subsegment exceeds 64K (size %d)"), + i, alpha_elf_tdata (this_got)->total_got_size); return FALSE; } - /* Swap in the FDR information. */ - amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr); - fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt); - if (fi->d.fdr == NULL) - { - msec->flags = origflags; - return FALSE; - } - external_fdr_size = swap->external_fdr_size; - fdr_ptr = fi->d.fdr; - fraw_src = (char *) fi->d.external_fdr; - fraw_end = (fraw_src - + fi->d.symbolic_header.ifdMax * external_fdr_size); - for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) - (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr); + if (got_list == NULL) + got_list = this_got; + else + alpha_elf_tdata(cur_got_obj)->got_link_next = this_got; + cur_got_obj = this_got; + } - elf_tdata (abfd)->find_line_info = fi; + /* Strange degenerate case of no got references. */ + if (got_list == NULL) + return TRUE; - /* Note that we don't bother to ever free this information. - find_nearest_line is either called all the time, as in - objdump -l, so the information should be saved, or it is - rarely called, as in ld error messages, so the memory - wasted is unimportant. Still, it would probably be a - good idea for free_cached_info to throw it away. */ - } + htab->got_list = got_list; + } - if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, - &fi->i, filename_ptr, functionname_ptr, - line_ptr)) + cur_got_obj = got_list; + if (cur_got_obj == NULL) + return FALSE; + + if (may_merge) + { + i = alpha_elf_tdata(cur_got_obj)->got_link_next; + while (i != NULL) { - msec->flags = origflags; - return TRUE; - } + if (elf64_alpha_can_merge_gots (cur_got_obj, i)) + { + elf64_alpha_merge_gots (cur_got_obj, i); - msec->flags = origflags; + alpha_elf_tdata(i)->got->size = 0; + i = alpha_elf_tdata(i)->got_link_next; + alpha_elf_tdata(cur_got_obj)->got_link_next = i; + } + else + { + cur_got_obj = i; + i = alpha_elf_tdata(i)->got_link_next; + } + } } - /* Fall back on the generic ELF find_nearest_line routine. */ + /* Once the gots have been merged, fill in the got offsets for + everything therein. */ + elf64_alpha_calc_got_offsets (info); - return _bfd_elf_find_nearest_line (abfd, section, symbols, offset, - filename_ptr, functionname_ptr, - line_ptr); + return TRUE; } - -/* Structure used to pass information to alpha_elf_output_extsym. */ - -struct extsym_info -{ - bfd *abfd; - struct bfd_link_info *info; - struct ecoff_debug_info *debug; - const struct ecoff_debug_swap *swap; - bfd_boolean failed; -}; static bfd_boolean -elf64_alpha_output_extsym (h, data) - struct alpha_elf_link_hash_entry *h; - PTR data; +elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h, + void * data) { - struct extsym_info *einfo = (struct extsym_info *) data; - bfd_boolean strip; - asection *sec, *output_section; - - if (h->root.root.type == bfd_link_hash_warning) - h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; - - if (h->root.indx == -2) - strip = FALSE; - else if ((h->root.def_dynamic - || h->root.ref_dynamic - || h->root.root.type == bfd_link_hash_new) - && !h->root.def_regular - && !h->root.ref_regular) - strip = TRUE; - else if (einfo->info->strip == strip_all - || (einfo->info->strip == strip_some - && bfd_hash_lookup (einfo->info->keep_hash, - h->root.root.root.string, - FALSE, FALSE) == NULL)) - strip = TRUE; - else - strip = FALSE; + asection *splt = (asection *) data; + struct alpha_elf_got_entry *gotent; + bfd_boolean saw_one = FALSE; - if (strip) + /* If we didn't need an entry before, we still don't. */ + if (!h->root.needs_plt) return TRUE; - if (h->esym.ifd == -2) - { - h->esym.jmptbl = 0; - h->esym.cobol_main = 0; - h->esym.weakext = 0; - h->esym.reserved = 0; - h->esym.ifd = ifdNil; - h->esym.asym.value = 0; - h->esym.asym.st = stGlobal; - - if (h->root.root.type != bfd_link_hash_defined - && h->root.root.type != bfd_link_hash_defweak) - h->esym.asym.sc = scAbs; - else - { - const char *name; - - sec = h->root.root.u.def.section; - output_section = sec->output_section; + /* For each LITERAL got entry still in use, allocate a plt entry. */ + for (gotent = h->got_entries; gotent ; gotent = gotent->next) + if (gotent->reloc_type == R_ALPHA_LITERAL + && gotent->use_count > 0) + { + if (splt->size == 0) + splt->size = PLT_HEADER_SIZE; + gotent->plt_offset = splt->size; + splt->size += PLT_ENTRY_SIZE; + saw_one = TRUE; + } - /* When making a shared library and symbol h is the one from - the another shared library, OUTPUT_SECTION may be null. */ - if (output_section == NULL) - h->esym.asym.sc = scUndefined; - else - { - name = bfd_section_name (output_section->owner, output_section); + /* If there weren't any, there's no longer a need for the PLT entry. */ + if (!saw_one) + h->root.needs_plt = FALSE; - if (strcmp (name, ".text") == 0) - h->esym.asym.sc = scText; - else if (strcmp (name, ".data") == 0) - h->esym.asym.sc = scData; - else if (strcmp (name, ".sdata") == 0) - h->esym.asym.sc = scSData; - else if (strcmp (name, ".rodata") == 0 - || strcmp (name, ".rdata") == 0) - h->esym.asym.sc = scRData; - else if (strcmp (name, ".bss") == 0) - h->esym.asym.sc = scBss; - else if (strcmp (name, ".sbss") == 0) - h->esym.asym.sc = scSBss; - else if (strcmp (name, ".init") == 0) - h->esym.asym.sc = scInit; - else if (strcmp (name, ".fini") == 0) - h->esym.asym.sc = scFini; - else - h->esym.asym.sc = scAbs; - } - } + return TRUE; +} - h->esym.asym.reserved = 0; - h->esym.asym.index = indexNil; - } +/* Called from relax_section to rebuild the PLT in light of potential changes + in the function's status. */ - if (h->root.root.type == bfd_link_hash_common) - h->esym.asym.value = h->root.root.u.c.size; - else if (h->root.root.type == bfd_link_hash_defined - || h->root.root.type == bfd_link_hash_defweak) - { - if (h->esym.asym.sc == scCommon) - h->esym.asym.sc = scBss; - else if (h->esym.asym.sc == scSCommon) - h->esym.asym.sc = scSBss; +static void +elf64_alpha_size_plt_section (struct bfd_link_info *info) +{ + asection *splt, *spltrel, *sgotplt; + unsigned long entries; + bfd *dynobj; + struct alpha_elf_link_hash_table * htab; - sec = h->root.root.u.def.section; - output_section = sec->output_section; - if (output_section != NULL) - h->esym.asym.value = (h->root.root.u.def.value - + sec->output_offset - + output_section->vma); - else - h->esym.asym.value = 0; - } - else if (h->root.needs_plt) + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return; + + dynobj = elf_hash_table(info)->dynobj; + splt = bfd_get_linker_section (dynobj, ".plt"); + if (splt == NULL) + return; + + splt->size = 0; + + alpha_elf_link_hash_traverse (htab, + elf64_alpha_size_plt_section_1, splt); + + /* Every plt entry requires a JMP_SLOT relocation. */ + spltrel = bfd_get_linker_section (dynobj, ".rela.plt"); + entries = 0; + if (splt->size) { - /* Set type and value for a symbol with a function stub. */ - h->esym.asym.st = stProc; - sec = bfd_get_section_by_name (einfo->abfd, ".plt"); - if (sec == NULL) - h->esym.asym.value = 0; + if (elf64_alpha_use_secureplt) + entries = (splt->size - NEW_PLT_HEADER_SIZE) / NEW_PLT_ENTRY_SIZE; else - { - output_section = sec->output_section; - if (output_section != NULL) - h->esym.asym.value = (h->root.plt.offset - + sec->output_offset - + output_section->vma); - else - h->esym.asym.value = 0; - } + entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE; } + spltrel->size = entries * sizeof (Elf64_External_Rela); - if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, - h->root.root.root.string, - &h->esym)) + /* When using the secureplt, we need two words somewhere in the data + segment for the dynamic linker to tell us where to go. This is the + entire contents of the .got.plt section. */ + if (elf64_alpha_use_secureplt) { - einfo->failed = TRUE; - return FALSE; + sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); + sgotplt->size = entries ? 16 : 0; } - - return TRUE; } - -/* 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; +static bfd_boolean +elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) { - struct alpha_elf_got_entry *gotent; - struct alpha_elf_got_entry **slot; + bfd *i; + struct alpha_elf_link_hash_table * htab; - if (h) - slot = &h->got_entries; - else - { - /* This is a local .got entry -- record for merge. */ + if (bfd_link_relocatable (info)) + return TRUE; - struct alpha_elf_got_entry **local_got_entries; + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return FALSE; - local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; - if (!local_got_entries) + if (!elf64_alpha_size_got_sections (info, TRUE)) + return FALSE; + + /* Allocate space for all of the .got subsections. */ + i = htab->got_list; + for ( ; i ; i = alpha_elf_tdata(i)->got_link_next) + { + asection *s = alpha_elf_tdata(i)->got; + if (s->size > 0) { - bfd_size_type size; - Elf_Internal_Shdr *symtab_hdr; + s->contents = (bfd_byte *) bfd_zalloc (i, s->size); + if (s->contents == NULL) + return FALSE; + } + } - symtab_hdr = &elf_tdata(abfd)->symtab_hdr; - size = symtab_hdr->sh_info; - size *= sizeof (struct alpha_elf_got_entry *); + return TRUE; +} - local_got_entries - = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size); - if (!local_got_entries) - return NULL; +/* The number of dynamic relocations required by a static relocation. */ - alpha_elf_tdata (abfd)->local_got_entries = local_got_entries; - } +static int +alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared, int pie) +{ + switch (r_type) + { + /* May appear in GOT entries. */ + case R_ALPHA_TLSGD: + return (dynamic ? 2 : shared ? 1 : 0); + case R_ALPHA_TLSLDM: + return shared; + case R_ALPHA_LITERAL: + return dynamic || shared; + case R_ALPHA_GOTTPREL: + return dynamic || (shared && !pie); + case R_ALPHA_GOTDTPREL: + return dynamic; - slot = &local_got_entries[r_symndx]; + /* May appear in data sections. */ + case R_ALPHA_REFLONG: + case R_ALPHA_REFQUAD: + return dynamic || shared; + case R_ALPHA_TPREL64: + return dynamic || (shared && !pie); + + /* Everything else is illegal. We'll issue an error during + relocate_section. */ + default: + return 0; } +} - for (gotent = *slot; gotent ; gotent = gotent->next) - if (gotent->gotobj == abfd - && gotent->reloc_type == r_type - && gotent->addend == r_addend) - break; +/* Work out the sizes of the dynamic relocation entries. */ - if (!gotent) - { - int entry_size; - bfd_size_type amt; +static bfd_boolean +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; + unsigned long entries; - amt = sizeof (struct alpha_elf_got_entry); - gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt); - if (!gotent) - return NULL; + /* If the symbol was defined as a common symbol in a regular object + file, and there was no definition in any dynamic object, then the + linker will have allocated space for the symbol in a common + section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been + set. This is done for dynamic symbols in + elf_adjust_dynamic_symbol but this is not done for non-dynamic + symbols, somehow. */ + if (!h->root.def_regular + && h->root.ref_regular + && !h->root.def_dynamic + && (h->root.root.type == bfd_link_hash_defined + || h->root.root.type == bfd_link_hash_defweak) + && !(h->root.root.u.def.section->owner->flags & DYNAMIC)) + h->root.def_regular = 1; - gotent->gotobj = abfd; - gotent->addend = r_addend; - gotent->got_offset = -1; - gotent->use_count = 1; - gotent->reloc_type = r_type; - gotent->reloc_done = 0; - gotent->reloc_xlated = 0; + /* 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); - gotent->next = *slot; - *slot = gotent; + /* 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 bfd_link_pic (info). */ + if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) + return TRUE; - entry_size = alpha_got_entry_size (r_type); - alpha_elf_tdata (abfd)->total_got_size += entry_size; - if (!h) - alpha_elf_tdata(abfd)->local_got_size += entry_size; + for (relent = h->reloc_entries; relent; relent = relent->next) + { + entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic, + bfd_link_pic (info), + bfd_link_pie (info)); + if (entries) + { + relent->srel->size += + entries * sizeof (Elf64_External_Rela) * relent->count; + if (relent->reltext) + info->flags |= DT_TEXTREL; + } } - else - gotent->use_count += 1; - return gotent; + return TRUE; } -/* Handle dynamic relocations when doing an Alpha ELF link. */ +/* Subroutine of elf64_alpha_size_rela_got_section for doing the + global symbols. */ 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_size_rela_got_1 (struct alpha_elf_link_hash_entry *h, + struct bfd_link_info *info) { - bfd *dynobj; - asection *sreloc; - const char *rel_sec_name; - Elf_Internal_Shdr *symtab_hdr; - struct alpha_elf_link_hash_entry **sym_hashes; - const Elf_Internal_Rela *rel, *relend; - bfd_boolean got_created; - bfd_size_type amt; + bfd_boolean dynamic; + struct alpha_elf_got_entry *gotent; + unsigned long entries; - if (info->relocatable) + /* If we're using a plt for this symbol, then all of its relocations + for its got entries go into .rela.plt. */ + if (h->root.needs_plt) return TRUE; - dynobj = elf_hash_table(info)->dynobj; - if (dynobj == NULL) - elf_hash_table(info)->dynobj = dynobj = abfd; + /* 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); - sreloc = NULL; - rel_sec_name = NULL; - symtab_hdr = &elf_tdata(abfd)->symtab_hdr; - sym_hashes = alpha_elf_sym_hashes(abfd); - got_created = FALSE; + /* 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 bfd_link_pic (info). */ + if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) + return TRUE; - relend = relocs + sec->reloc_count; - for (rel = relocs; rel < relend; ++rel) + 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, + bfd_link_pic (info), + bfd_link_pie (info)); + + if (entries > 0) { - enum { - NEED_GOT = 1, - NEED_GOT_ENTRY = 2, - NEED_DYNREL = 4 - }; + bfd *dynobj = elf_hash_table(info)->dynobj; + asection *srel = bfd_get_linker_section (dynobj, ".rela.got"); + BFD_ASSERT (srel != NULL); + srel->size += sizeof (Elf64_External_Rela) * entries; + } - unsigned long r_symndx, r_type; - struct alpha_elf_link_hash_entry *h; - unsigned int gotent_flags; - bfd_boolean maybe_dynamic; - unsigned int need; - bfd_vma addend; + return TRUE; +} - r_symndx = ELF64_R_SYM (rel->r_info); - if (r_symndx < symtab_hdr->sh_info) - h = NULL; - else +/* Set the sizes of the dynamic relocation sections. */ + +static void +elf64_alpha_size_rela_got_section (struct bfd_link_info *info) +{ + unsigned long entries; + bfd *i, *dynobj; + asection *srel; + struct alpha_elf_link_hash_table * htab; + + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return; + + /* Shared libraries often require RELATIVE relocs, and some relocs + require attention for the main application as well. */ + + entries = 0; + for (i = htab->got_list; + i ; i = alpha_elf_tdata(i)->got_link_next) + { + bfd *j; + + for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + struct alpha_elf_got_entry **local_got_entries, *gotent; + int k, n; - 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; + local_got_entries = alpha_elf_tdata(j)->local_got_entries; + if (!local_got_entries) + continue; - h->root.ref_regular = 1; + for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) + for (gotent = local_got_entries[k]; + gotent ; gotent = gotent->next) + if (gotent->use_count > 0) + entries += (alpha_dynamic_entries_for_reloc + (gotent->reloc_type, 0, bfd_link_pic (info), + bfd_link_pie (info))); } + } - /* We can only get preliminary data on whether a symbol is - locally or externally defined, as not all of the input files - have yet been processed. Do something with what we know, as - 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)) - || !h->root.def_regular - || h->root.root.type == bfd_link_hash_defweak)) - maybe_dynamic = TRUE; + dynobj = elf_hash_table(info)->dynobj; + srel = bfd_get_linker_section (dynobj, ".rela.got"); + if (!srel) + { + BFD_ASSERT (entries == 0); + return; + } + srel->size = sizeof (Elf64_External_Rela) * entries; + + /* Now do the non-local symbols. */ + alpha_elf_link_hash_traverse (htab, + elf64_alpha_size_rela_got_1, info); +} - need = 0; - gotent_flags = 0; - r_type = ELF64_R_TYPE (rel->r_info); - addend = rel->r_addend; +/* Set the sizes of the dynamic sections. */ - switch (r_type) - { - case R_ALPHA_LITERAL: - need = NEED_GOT | NEED_GOT_ENTRY; +static bfd_boolean +elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + bfd *dynobj; + asection *s; + bfd_boolean relplt; + struct alpha_elf_link_hash_table * htab; - /* Remember how this literal is used from its LITUSEs. - This will be important when it comes to decide if we can - create a .plt entry for a function symbol. */ - while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE) - if (rel->r_addend >= 1 && rel->r_addend <= 5) - gotent_flags |= 1 << rel->r_addend; - --rel; + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return FALSE; - /* No LITUSEs -- presumably the address is used somehow. */ - if (gotent_flags == 0) - gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR; - break; + dynobj = elf_hash_table(info)->dynobj; + BFD_ASSERT(dynobj != NULL); - case R_ALPHA_GPDISP: - case R_ALPHA_GPREL16: - case R_ALPHA_GPREL32: - case R_ALPHA_GPRELHIGH: - case R_ALPHA_GPRELLOW: - case R_ALPHA_BRSGP: - need = NEED_GOT; - break; + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Set the contents of the .interp section to the interpreter. */ + if (bfd_link_executable (info) && !info->nointerp) + { + s = bfd_get_linker_section (dynobj, ".interp"); + BFD_ASSERT (s != NULL); + s->size = sizeof ELF_DYNAMIC_INTERPRETER; + s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; + } - case R_ALPHA_REFLONG: - case R_ALPHA_REFQUAD: - if ((info->shared && (sec->flags & SEC_ALLOC)) || maybe_dynamic) - need = NEED_DYNREL; - break; + /* Now that we've seen all of the input files, we can decide which + symbols need dynamic relocation entries and which don't. We've + collected information in check_relocs that we can now apply to + size the dynamic relocation sections. */ + alpha_elf_link_hash_traverse (htab, + elf64_alpha_calc_dynrel_sizes, info); - 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; - h = 0; - maybe_dynamic = FALSE; - /* FALLTHRU */ + elf64_alpha_size_rela_got_section (info); + elf64_alpha_size_plt_section (info); + } + /* else we're not dynamic and by definition we don't need such things. */ - case R_ALPHA_TLSGD: - case R_ALPHA_GOTDTPREL: - need = NEED_GOT | NEED_GOT_ENTRY; - break; + /* The check_relocs and adjust_dynamic_symbol entry points have + determined the sizes of the various dynamic sections. Allocate + memory for them. */ + relplt = FALSE; + for (s = dynobj->sections; s != NULL; s = s->next) + { + const char *name; - case R_ALPHA_GOTTPREL: - need = NEED_GOT | NEED_GOT_ENTRY; - gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE; - if (info->shared) - info->flags |= DF_STATIC_TLS; - break; + if (!(s->flags & SEC_LINKER_CREATED)) + continue; - case R_ALPHA_TPREL64: - if (info->shared || maybe_dynamic) - need = NEED_DYNREL; - if (info->shared) - info->flags |= DF_STATIC_TLS; - break; - } + /* It's OK to base decisions on the section name, because none + of the dynobj section names depend upon the input files. */ + name = bfd_get_section_name (dynobj, s); - if (need & NEED_GOT) + if (CONST_STRNEQ (name, ".rela")) { - if (!got_created) + if (s->size != 0) { - if (!elf64_alpha_create_got_section (abfd, info)) - return FALSE; - - /* Make sure the object's gotobj is set to itself so - that we default to every object with its own .got. - We'll merge .gots later once we've collected each - object's info. */ - alpha_elf_tdata(abfd)->gotobj = abfd; + if (strcmp (name, ".rela.plt") == 0) + relplt = TRUE; - got_created = 1; + /* We use the reloc_count field as a counter if we need + to copy relocs into the output file. */ + s->reloc_count = 0; } } + else if (! CONST_STRNEQ (name, ".got") + && strcmp (name, ".plt") != 0 + && strcmp (name, ".dynbss") != 0) + { + /* It's not one of our dynamic sections, so don't allocate space. */ + continue; + } - if (need & NEED_GOT_ENTRY) + if (s->size == 0) { - struct alpha_elf_got_entry *gotent; + /* If we don't need this section, strip it from the output file. + This is to handle .rela.bss and .rela.plt. We must create it + in create_dynamic_sections, because it must be created before + the linker maps input sections to output sections. The + linker does that before adjust_dynamic_symbol is called, and + it is that function which decides whether anything needs to + go into these sections. */ + if (!CONST_STRNEQ (name, ".got")) + s->flags |= SEC_EXCLUDE; + } + else if ((s->flags & SEC_HAS_CONTENTS) != 0) + { + /* Allocate memory for the section contents. */ + s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); + if (s->contents == NULL) + return FALSE; + } + } - gotent = get_got_entry (abfd, h, r_type, r_symndx, addend); - if (!gotent) + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in elf64_alpha_finish_dynamic_sections, but we + must add the entries now so that we get the correct size for + the .dynamic section. The DT_DEBUG entry is filled in by the + dynamic linker and used by the debugger. */ +#define add_dynamic_entry(TAG, VAL) \ + _bfd_elf_add_dynamic_entry (info, TAG, VAL) + + if (bfd_link_executable (info)) + { + if (!add_dynamic_entry (DT_DEBUG, 0)) return FALSE; + } - if (gotent_flags) - { - gotent->flags |= gotent_flags; - if (h) - { - gotent_flags |= h->flags; - h->flags = gotent_flags; + if (relplt) + { + if (!add_dynamic_entry (DT_PLTGOT, 0) + || !add_dynamic_entry (DT_PLTRELSZ, 0) + || !add_dynamic_entry (DT_PLTREL, DT_RELA) + || !add_dynamic_entry (DT_JMPREL, 0)) + return FALSE; - /* Make a guess as to whether a .plt entry is needed. */ - if ((gotent_flags & ALPHA_ELF_LINK_HASH_LU_FUNC) - && !(gotent_flags & ~ALPHA_ELF_LINK_HASH_LU_FUNC)) - h->root.needs_plt = 1; - else - h->root.needs_plt = 0; - } - } + if (elf64_alpha_use_secureplt + && !add_dynamic_entry (DT_ALPHA_PLTRO, 1)) + return FALSE; } - if (need & NEED_DYNREL) + if (!add_dynamic_entry (DT_RELA, 0) + || !add_dynamic_entry (DT_RELASZ, 0) + || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) + return FALSE; + + if (info->flags & DF_TEXTREL) { - if (rel_sec_name == NULL) - { - rel_sec_name = (bfd_elf_string_from_elf_section - (abfd, elf_elfheader(abfd)->e_shstrndx, - elf_section_data(sec)->rel_hdr.sh_name)); - if (rel_sec_name == NULL) - return FALSE; + if (!add_dynamic_entry (DT_TEXTREL, 0)) + return FALSE; + } + } +#undef add_dynamic_entry - BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0 - && strcmp (bfd_get_section_name (abfd, sec), - rel_sec_name+5) == 0); - } + return TRUE; +} + +/* These functions do relaxation for Alpha ELF. - /* We need to create the section here now whether we eventually - use it or not so that it gets mapped to an output section by - the linker. If not used, we'll kill it in - size_dynamic_sections. */ - if (sreloc == NULL) - { - sreloc = bfd_get_section_by_name (dynobj, rel_sec_name); - if (sreloc == NULL) - { - flagword flags; - - flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY - | SEC_LINKER_CREATED | SEC_READONLY); - if (sec->flags & SEC_ALLOC) - flags |= SEC_ALLOC | SEC_LOAD; - sreloc = bfd_make_section_with_flags (dynobj, - rel_sec_name, - flags); - if (sreloc == NULL - || !bfd_set_section_alignment (dynobj, sreloc, 3)) - return FALSE; - } - } + 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. - if (h) - { - /* Since we havn't seen all of the input symbols yet, we - don't know whether we'll actually need a dynamic relocation - entry for this reloc. So make a record of it. Once we - find out if this thing needs dynamic relocation we'll - expand the relocation sections by the appropriate amount. */ + 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. */ - struct alpha_elf_reloc_entry *rent; +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; +}; - for (rent = h->reloc_entries; rent; rent = rent->next) - if (rent->rtype == r_type && rent->srel == sreloc) - break; +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; +} - if (!rent) - { - amt = sizeof (struct alpha_elf_reloc_entry); - rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt); - if (!rent) - return FALSE; +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; - rent->srel = sreloc; - rent->rtype = r_type; - rent->count = 1; - rent->reltext = ((sec->flags & (SEC_READONLY | SEC_ALLOC)) - == (SEC_READONLY | SEC_ALLOC)); + /* Get the instruction. */ + insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); - rent->next = h->reloc_entries; - h->reloc_entries = rent; - } - else - rent->count++; - } - else if (info->shared) - { - /* If this is a shared library, and the section is to be - loaded into memory, we need a RELATIVE reloc. */ - sreloc->size += sizeof (Elf64_External_Rela); - if ((sec->flags & (SEC_READONLY | SEC_ALLOC)) - == (SEC_READONLY | SEC_ALLOC)) - info->flags |= DF_TEXTREL; - } - } + 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; } - return TRUE; -} - -/* Adjust a symbol defined by a dynamic object and referenced by a - regular object. The current definition is in some section of the - dynamic object, but we're not including those sections. We have to - change the definition to something the rest of the link can - understand. */ - -static bfd_boolean -elf64_alpha_adjust_dynamic_symbol (info, h) - struct bfd_link_info *info; - struct elf_link_hash_entry *h; -{ - bfd *dynobj; - asection *s; - struct alpha_elf_link_hash_entry *ah; + /* Can't relax dynamic symbols. */ + if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) + return TRUE; - dynobj = elf_hash_table(info)->dynobj; - ah = (struct alpha_elf_link_hash_entry *)h; + /* Can't use local-exec relocations in shared libraries. */ + if (r_type == R_ALPHA_GOTTPREL + && bfd_link_dll (info->link_info)) + return TRUE; - /* Now that we've seen all of the input symbols, finalize our decision - about whether this symbol should get a .plt entry. */ - - if (alpha_elf_dynamic_symbol_p (h, info) - && ((h->type == STT_FUNC - && !(ah->flags & ALPHA_ELF_LINK_HASH_LU_ADDR)) - || (h->type == STT_NOTYPE - && (ah->flags & ALPHA_ELF_LINK_HASH_LU_FUNC) - && !(ah->flags & ~ALPHA_ELF_LINK_HASH_LU_FUNC))) - /* Don't prevent otherwise valid programs from linking by attempting - to create a new .got entry somewhere. A Correct Solution would be - to add a new .got section to a new object file and let it be merged - somewhere later. But for now don't bother. */ - && ah->got_entries) + if (r_type == R_ALPHA_LITERAL) { - h->needs_plt = 1; + /* 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) + || (!bfd_link_pic (info->link_info) + && (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 + { + /* We may only create GPREL relocs during the second pass. */ + if (info->link_info->relax_pass == 0) + return TRUE; - s = bfd_get_section_by_name(dynobj, ".plt"); - if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info)) - return FALSE; + disp = symval - info->gp; + insn = (OP_LDA << 26) | (insn & 0x03ff0000); + r_type = R_ALPHA_GPREL16; + } + } + else + { + bfd_vma dtp_base, tp_base; - /* The first bit of the .plt is reserved. */ - if (s->size == 0) - s->size = PLT_HEADER_SIZE; + 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); - h->plt.offset = s->size; - s->size += PLT_ENTRY_SIZE; + insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); - /* If this symbol is not defined in a regular file, and we are not - generating a shared library, then set the symbol to the location - in the .plt. This is required to make function pointers compare - equal between the normal executable and the shared library. */ - if (! info->shared - && h->root.type != bfd_link_hash_defweak) + switch (r_type) { - ah->plt_old_section = h->root.u.def.section; - ah->plt_old_value = h->root.u.def.value; - ah->flags |= ALPHA_ELF_LINK_HASH_PLT_LOC; - h->root.u.def.section = s; - h->root.u.def.value = h->plt.offset; + 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; } + } - /* We also need a JMP_SLOT entry in the .rela.plt section. */ - s = bfd_get_section_by_name (dynobj, ".rela.plt"); - BFD_ASSERT (s != NULL); - s->size += sizeof (Elf64_External_Rela); + if (disp < -0x8000 || disp >= 0x8000) + return TRUE; - return TRUE; - } - else - h->needs_plt = 0; + bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset); + info->changed_contents = TRUE; - /* If this is a weak symbol, and there is a real definition, the - processor independent code will have arranged for us to see the - real definition first, and we can just use the same value. */ - if (h->u.weakdef != NULL) + /* Reduce the use count on this got entry by one, possibly + eliminating it. */ + if (--info->gotent->use_count == 0) { - BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined - || h->u.weakdef->root.type == bfd_link_hash_defweak); - h->root.u.def.section = h->u.weakdef->root.u.def.section; - h->root.u.def.value = h->u.weakdef->root.u.def.value; - return TRUE; + 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; } - /* This is a reference to a symbol defined by a dynamic object which - is not a function. The Alpha, since it uses .got entries for all - symbols even in regular objects, does not need the hackery of a - .dynbss section and COPY dynamic relocations. */ + /* 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; - return 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. -/* Symbol versioning can create new symbols, and make our old symbols - indirect to the new ones. Consolidate the got and reloc information - in these situations. */ + 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. -static bfd_boolean -elf64_alpha_merge_ind_symbols (hi, dummy) - struct alpha_elf_link_hash_entry *hi; - PTR dummy ATTRIBUTE_UNUSED; -{ - struct alpha_elf_link_hash_entry *hs; + Any such jsr insn can be replaced by a bsr if it is in range. - if (hi->root.root.type != bfd_link_hash_indirect) - return TRUE; - hs = hi; - do { - hs = (struct alpha_elf_link_hash_entry *)hs->root.root.u.i.link; - } while (hs->root.root.type == bfd_link_hash_indirect); + This would mean that we'd have to _add_ relocations, the pain of + which gives one pause. */ - /* Merge the flags. Whee. */ + return TRUE; +} - hs->flags |= hi->flags; +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. */ - /* Merge the .got entries. Cannibalize the old symbol's list in - doing so, since we don't need it anymore. */ + /* 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 (hs->got_entries == NULL) - hs->got_entries = hi->got_entries; + /* 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 { - struct alpha_elf_got_entry *gi, *gs, *gin, *gsh; + Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp; + bfd_vma ofs; - gsh = hs->got_entries; - for (gi = hi->got_entries; gi ; gi = gin) + /* Load the relocations from the section that the target symbol is in. */ + if (info->sec == info->tsec) { - gin = gi->next; - for (gs = gsh; gs ; gs = gs->next) - if (gi->gotobj == gs->gotobj - && gi->reloc_type == gs->reloc_type - && gi->addend == gs->addend) - { - gi->use_count += gs->use_count; - goto got_found; - } - gi->next = hs->got_entries; - hs->got_entries = gi; - got_found:; + tsec_relocs = info->relocs; + tsec_relend = info->relend; + tsec_free = NULL; + } + else + { + tsec_relocs = (_bfd_elf_link_read_relocs + (info->abfd, info->tsec, 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); } - } - hi->got_entries = NULL; - /* And similar for the reloc entries. */ + /* Recover the symbol's offset within the section. */ + ofs = (symval - info->tsec->output_section->vma + - info->tsec->output_offset); - if (hs->reloc_entries == NULL) - hs->reloc_entries = hi->reloc_entries; - else - { - struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh; + /* Look for a GPDISP reloc. */ + gpdisp = (elf64_alpha_find_reloc_at_ofs + (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP)); - rsh = hs->reloc_entries; - for (ri = hi->reloc_entries; ri ; ri = rin) + if (!gpdisp || gpdisp->r_addend != 4) { - rin = ri->next; - for (rs = rsh; rs ; rs = rs->next) - if (ri->rtype == rs->rtype && ri->srel == rs->srel) - { - rs->count += ri->count; - goto found_reloc; - } - ri->next = hs->reloc_entries; - hs->reloc_entries = ri; - found_reloc:; + if (tsec_free) + free (tsec_free); + return 0; } + if (tsec_free) + free (tsec_free); } - hi->reloc_entries = NULL; - return TRUE; -} + /* 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->output_bfd->xvec != info->tsec->owner->xvec + || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj) + return 0; -/* Is it possible to merge two object file's .got tables? */ + return symval + 8; +} static bfd_boolean -elf64_alpha_can_merge_gots (a, b) - bfd *a, *b; +elf64_alpha_relax_with_lituse (struct alpha_relax_info *info, + bfd_vma symval, Elf_Internal_Rela *irel) { - int total = alpha_elf_tdata (a)->total_got_size; - bfd *bsub; - - /* Trivial quick fallout test. */ - if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE) - return TRUE; - - /* By their nature, local .got entries cannot be merged. */ - if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE) - return FALSE; + Elf_Internal_Rela *urel, *erel, *irelend = info->relend; + int flags; + bfd_signed_vma disp; + bfd_boolean fits16; + bfd_boolean fits32; + bfd_boolean lit_reused = FALSE; + bfd_boolean all_optimized = TRUE; + bfd_boolean changed_contents; + bfd_boolean changed_relocs; + bfd_byte *contents = info->contents; + bfd *abfd = info->abfd; + bfd_vma sec_output_vma; + unsigned int lit_insn; + int relax_pass; - /* Failing the common trivial comparison, we must effectively - perform the merge. Not actually performing the merge means that - we don't have to store undo information in case we fail. */ - for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) + lit_insn = bfd_get_32 (abfd, contents + irel->r_offset); + if (lit_insn >> 26 != OP_LDQ) { - struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub); - Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr; - int i, n; - - n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; - for (i = 0; i < n; ++i) - { - struct alpha_elf_got_entry *ae, *be; - struct alpha_elf_link_hash_entry *h; - - h = hashes[i]; - 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; - - for (be = h->got_entries; be ; be = be->next) - { - if (be->use_count == 0) - continue; - if (be->gotobj != b) - continue; - - for (ae = h->got_entries; ae ; ae = ae->next) - if (ae->gotobj == a - && ae->reloc_type == be->reloc_type - && ae->addend == be->addend) - goto global_found; - - total += alpha_got_entry_size (be->reloc_type); - if (total > MAX_GOT_SIZE) - return FALSE; - global_found:; - } - } + ((*_bfd_error_handler) + ("%B: %A+0x%lx: warning: LITERAL relocation against unexpected insn", + abfd, info->sec, + (unsigned long) irel->r_offset)); + return TRUE; } - return TRUE; -} + /* Can't relax dynamic symbols. */ + if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) + return TRUE; -/* Actually merge two .got tables. */ + changed_contents = info->changed_contents; + changed_relocs = info->changed_relocs; + sec_output_vma = info->sec->output_section->vma + info->sec->output_offset; + relax_pass = info->link_info->relax_pass; -static void -elf64_alpha_merge_gots (a, b) - bfd *a, *b; -{ - int total = alpha_elf_tdata (a)->total_got_size; - bfd *bsub; + /* Summarize how this particular LITERAL is used. */ + for (erel = irel+1, flags = 0; erel < irelend; ++erel) + { + if (ELF64_R_TYPE (erel->r_info) != R_ALPHA_LITUSE) + break; + if (erel->r_addend <= 6) + flags |= 1 << erel->r_addend; + } - /* Remember local expansion. */ - { - int e = alpha_elf_tdata (b)->local_got_size; - total += e; - alpha_elf_tdata (a)->local_got_size += e; - } + /* A little preparation for the loop... */ + disp = symval - info->gp; - for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) + for (urel = irel+1; urel < erel; ++urel) { - struct alpha_elf_got_entry **local_got_entries; - struct alpha_elf_link_hash_entry **hashes; - Elf_Internal_Shdr *symtab_hdr; - int i, n; + bfd_vma urel_r_offset = urel->r_offset; + unsigned int insn; + int insn_disp; + bfd_signed_vma xdisp; + Elf_Internal_Rela nrel; - /* Let the local .got entries know they are part of a new subsegment. */ - local_got_entries = alpha_elf_tdata (bsub)->local_got_entries; - if (local_got_entries) - { - n = elf_tdata (bsub)->symtab_hdr.sh_info; - for (i = 0; i < n; ++i) + insn = bfd_get_32 (abfd, 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 may only create GPREL relocs during the second pass. */ + if (relax_pass == 0) { - struct alpha_elf_got_entry *ent; - for (ent = local_got_entries[i]; ent; ent = ent->next) - ent->gotobj = a; + all_optimized = FALSE; + break; } - } - /* Merge the global .got entries. */ - hashes = alpha_elf_sym_hashes (bsub); - symtab_hdr = &elf_tdata (bsub)->symtab_hdr; + /* We can always optimize 16-bit displacements. */ - n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; - for (i = 0; i < n; ++i) - { - struct alpha_elf_got_entry *ae, *be, **pbe, **start; - struct alpha_elf_link_hash_entry *h; + /* 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; - h = hashes[i]; - 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; + xdisp = disp + insn_disp; + fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000); + fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 + && xdisp < 0x7fff8000); - start = &h->got_entries; - for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next) + if (fits16) { - if (be->use_count == 0) - { - *pbe = be->next; - continue; - } - if (be->gotobj != b) - continue; - - for (ae = *start; ae ; ae = ae->next) - if (ae->gotobj == a - && ae->reloc_type == be->reloc_type - && ae->addend == be->addend) - { - ae->flags |= be->flags; - ae->use_count += be->use_count; - *pbe = be->next; - goto global_found; - } - be->gotobj = a; - total += alpha_got_entry_size (be->reloc_type); - - global_found:; + /* 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); + bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset); + changed_contents = TRUE; + + nrel = *urel; + nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), + R_ALPHA_GPREL16); + nrel.r_addend = irel->r_addend; + + /* As we adjust, move the reloc to the end so that we don't + break the LITERAL+LITUSE chain. */ + if (urel < --erel) + *urel-- = *erel; + *erel = nrel; + changed_relocs = TRUE; } - } - - alpha_elf_tdata (bsub)->gotobj = a; - } - alpha_elf_tdata (a)->total_got_size = total; - - /* Merge the two in_got chains. */ - { - bfd *next; - bsub = a; - while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL) - bsub = next; + /* 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. */ - alpha_elf_tdata (bsub)->in_got_link_next = b; - } -} + 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 (abfd, (bfd_vma) lit_insn, contents + irel->r_offset); + lit_reused = TRUE; + changed_contents = TRUE; -/* Calculate the offsets for the got entries. */ + /* Since all relocs must be optimized, don't bother swapping + this relocation to the end. */ + urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), + R_ALPHA_GPRELLOW); + urel->r_addend = irel->r_addend; + changed_relocs = TRUE; + } + else + all_optimized = FALSE; + break; -static bfd_boolean -elf64_alpha_calc_got_offsets_for_symbol (h, arg) - struct alpha_elf_link_hash_entry *h; - PTR arg ATTRIBUTE_UNUSED; -{ - bfd_boolean result = TRUE; - struct alpha_elf_got_entry *gotent; + case LITUSE_ALPHA_BYTOFF: + /* We can always optimize byte instructions. */ - if (h->root.root.type == bfd_link_hash_warning) - h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; + /* FIXME: sanity check the insn for byte op. Check that the + literal dest reg is indeed Rb in the byte insn. */ - for (gotent = h->got_entries; gotent; gotent = gotent->next) - if (gotent->use_count > 0) - { - struct alpha_elf_obj_tdata *td; - bfd_size_type *plge; + insn &= ~ (unsigned) 0x001ff000; + insn |= ((symval & 7) << 13) | 0x1000; + bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset); + changed_contents = TRUE; + + nrel = *urel; + nrel.r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + nrel.r_addend = 0; + + /* As we adjust, move the reloc to the end so that we don't + break the LITERAL+LITUSE chain. */ + if (urel < --erel) + *urel-- = *erel; + *erel = nrel; + changed_relocs = TRUE; + break; - td = alpha_elf_tdata (gotent->gotobj); - if (td == NULL) + case LITUSE_ALPHA_JSR: + case LITUSE_ALPHA_TLSGD: + case LITUSE_ALPHA_TLSLDM: + case LITUSE_ALPHA_JSRDIRECT: { - _bfd_error_handler (_("Symbol %s has no GOT subsection for offset 0x%x"), - h->root.root.root.string, gotent->got_offset); - result = FALSE; - continue; - } - plge = &td->got->size; - gotent->got_offset = *plge; - *plge += alpha_got_entry_size (gotent->reloc_type); - } - - return result; -} - -static void -elf64_alpha_calc_got_offsets (info) - struct bfd_link_info *info; -{ - bfd *i, *got_list = alpha_elf_hash_table(info)->got_list; - - /* First, zero out the .got sizes, as we may be recalculating the - .got after optimizing it. */ - for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) - alpha_elf_tdata(i)->got->size = 0; - - /* Next, fill in the offsets for all the global entries. */ - alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), - elf64_alpha_calc_got_offsets_for_symbol, - NULL); - - /* Finally, fill in the offsets for the local entries. */ - for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) - { - bfd_size_type got_offset = alpha_elf_tdata(i)->got->size; - bfd *j; - - for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) - { - struct alpha_elf_got_entry **local_got_entries, *gotent; - int k, n; + bfd_vma optdest, org; + bfd_signed_vma odisp; - local_got_entries = alpha_elf_tdata(j)->local_got_entries; - if (!local_got_entries) - continue; + /* 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 (abfd, (bfd_vma) insn, contents + urel_r_offset); - for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) - for (gotent = local_got_entries[k]; gotent; gotent = gotent->next) - if (gotent->use_count > 0) - { - gotent->got_offset = got_offset; - got_offset += alpha_got_entry_size (gotent->reloc_type); - } - } + changed_contents = TRUE; + break; + } - alpha_elf_tdata(i)->got->size = got_offset; - } -} + /* If not zero, place to jump without needing pv. */ + optdest = elf64_alpha_relax_opt_call (info, symval); + org = sec_output_vma + urel_r_offset + 4; + odisp = (optdest ? optdest : symval) - org; -/* Constructs the gots. */ + if (odisp >= -0x400000 && odisp < 0x400000) + { + Elf_Internal_Rela *xrel; -static bfd_boolean -elf64_alpha_size_got_sections (info) - struct bfd_link_info *info; -{ - bfd *i, *got_list, *cur_got_obj = NULL; - int something_changed = 0; + /* 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); + bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset); + changed_contents = TRUE; - got_list = alpha_elf_hash_table (info)->got_list; + nrel = *urel; + nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), + R_ALPHA_BRADDR); + nrel.r_addend = irel->r_addend; - /* On the first time through, pretend we have an existing got list - consisting of all of the input files. */ - if (got_list == NULL) - { - for (i = info->input_bfds; i ; i = i->link_next) - { - bfd *this_got = alpha_elf_tdata (i)->gotobj; - if (this_got == NULL) - continue; + if (optdest) + nrel.r_addend += optdest - symval; + else + all_optimized = FALSE; - /* We are assuming no merging has yet occurred. */ - BFD_ASSERT (this_got == i); + /* 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); - if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE) - { - /* Yikes! A single object file has too many entries. */ - (*_bfd_error_handler) - (_("%B: .got subsegment exceeds 64K (size %d)"), - i, alpha_elf_tdata (this_got)->total_got_size); - return FALSE; - } + /* As we adjust, move the reloc to the end so that we don't + break the LITERAL+LITUSE chain. */ + if (urel < --erel) + *urel-- = *erel; + *erel = nrel; - if (got_list == NULL) - got_list = this_got; - else - alpha_elf_tdata(cur_got_obj)->got_link_next = this_got; - cur_got_obj = this_got; - } + info->changed_relocs = TRUE; + } + else + all_optimized = FALSE; - /* Strange degenerate case of no got references. */ - if (got_list == NULL) - return TRUE; + /* 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 = contents + gpdisp->r_offset; + bfd_byte *p_lda = p_ldah + gpdisp->r_addend; + unsigned int ldah = bfd_get_32 (abfd, p_ldah); + unsigned int lda = bfd_get_32 (abfd, p_lda); - alpha_elf_hash_table (info)->got_list = got_list; + /* 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 (abfd, (bfd_vma) INSN_UNOP, p_ldah); + bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, p_lda); - /* Force got offsets to be recalculated. */ - something_changed = 1; + gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + changed_contents = TRUE; + changed_relocs = TRUE; + } + } + } + } + break; + } } - cur_got_obj = got_list; - i = alpha_elf_tdata(cur_got_obj)->got_link_next; - while (i != NULL) + /* If we reused the literal instruction, we must have optimized all. */ + BFD_ASSERT(!lit_reused || all_optimized); + + /* If all cases were optimized, we can reduce the use count on this + got entry by one, possibly eliminating it. */ + if (all_optimized) { - if (elf64_alpha_can_merge_gots (cur_got_obj, i)) + if (--info->gotent->use_count == 0) { - elf64_alpha_merge_gots (cur_got_obj, i); - i = alpha_elf_tdata(i)->got_link_next; - alpha_elf_tdata(cur_got_obj)->got_link_next = i; - something_changed = 1; + 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; } - else + + /* 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) { - cur_got_obj = i; - i = alpha_elf_tdata(i)->got_link_next; + irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + changed_relocs = TRUE; + + bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, contents + irel->r_offset); + changed_contents = TRUE; } } - /* Once the gots have been merged, fill in the got offsets for - everything therein. */ - if (1 || something_changed) - elf64_alpha_calc_got_offsets (info); + info->changed_contents = changed_contents; + info->changed_relocs = changed_relocs; - return TRUE; + if (all_optimized || relax_pass == 0) + return TRUE; + return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL); } -/* 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; +elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval, + Elf_Internal_Rela *irel, bfd_boolean is_gd) { - 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; + bfd_byte *pos[5]; + unsigned int insn, tlsgd_reg; + Elf_Internal_Rela *gpdisp, *hint; + bfd_boolean dynamic, use_gottprel; + unsigned long new_symndx; - splt->size = 0; + dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info); - alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), - elf64_alpha_size_plt_section_1, splt); + /* 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)) + ; - /* 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); + /* If the symbol is local, and we've already committed to DF_STATIC_TLS, + then we might as well relax to IE. */ + else if (bfd_link_pic (info->link_info) && !dynamic + && (info->link_info->flags & DF_STATIC_TLS)) + ; - return TRUE; -} + /* Otherwise we must be building an executable to do anything. */ + else if (bfd_link_pic (info->link_info)) + return TRUE; -static bfd_boolean -elf64_alpha_size_plt_section_1 (h, data) - struct alpha_elf_link_hash_entry *h; - PTR data; -{ - asection *splt = (asection *) data; - struct alpha_elf_got_entry *gotent; + /* 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; - /* If we didn't need an entry before, we still don't. */ - if (!h->root.needs_plt) + /* 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; - /* There must still be a LITERAL got entry for the function. */ - for (gotent = h->got_entries; gotent ; gotent = gotent->next) - if (gotent->reloc_type == R_ALPHA_LITERAL - && gotent->use_count > 0) - break; + 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; - /* If there is, reset the PLT offset. If not, there's no longer - a need for the PLT entry. */ - if (gotent) + /* Beware of the compiler hoisting part of the sequence out a loop + and adjusting the destination register for the TLSGD insn. If this + happens, there will be a move into $16 before the JSR insn, so only + transformations of the first insn pair should use this register. */ + tlsgd_reg = bfd_get_32 (info->abfd, pos[0]); + tlsgd_reg = (tlsgd_reg >> 21) & 31; + + /* 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]) { - if (splt->size == 0) - splt->size = PLT_HEADER_SIZE; - h->root.plt.offset = splt->size; - splt->size += PLT_ENTRY_SIZE; + bfd_byte *tmp = pos[0]; + pos[0] = pos[1]; + pos[1] = tmp; } - else - { - h->root.needs_plt = 0; - h->root.plt.offset = -1; + if (pos[1] >= pos[2] || pos[2] >= pos[3]) + return TRUE; - /* Undo the definition frobbing begun in adjust_dynamic_symbol. */ - if (h->flags & ALPHA_ELF_LINK_HASH_PLT_LOC) - { - h->root.root.u.def.section = h->plt_old_section; - h->root.root.u.def.value = h->plt_old_value; - h->flags &= ~ALPHA_ELF_LINK_HASH_PLT_LOC; - } - } + /* 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; - return TRUE; -} + 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]; -static bfd_boolean -elf64_alpha_always_size_sections (output_bfd, info) - bfd *output_bfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info; -{ - bfd *i; + 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; - if (info->relocatable) - return TRUE; + 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); - /* First, take care of the indirect symbols created by versioning. */ - alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), - elf64_alpha_merge_ind_symbols, - NULL); + if (--lit_gotent->use_count == 0) + { + int sz = alpha_got_entry_size (R_ALPHA_LITERAL); + alpha_elf_tdata (info->gotobj)->total_got_size -= sz; + } + } - if (!elf64_alpha_size_got_sections (info)) - return FALSE; + /* Change - /* Allocate space for all of the .got subsections. */ - i = alpha_elf_hash_table (info)->got_list; - for ( ; i ; i = alpha_elf_tdata(i)->got_link_next) - { - asection *s = alpha_elf_tdata(i)->got; - if (s->size > 0) - { - s->contents = (bfd_byte *) bfd_zalloc (i, s->size); - if (s->contents == NULL) - return FALSE; - } - } + 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 - return TRUE; -} + as appropriate. */ -/* The number of dynamic relocations required by a static relocation. */ + use_gottprel = FALSE; + new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : STN_UNDEF; -static int -alpha_dynamic_entries_for_reloc (r_type, dynamic, shared) - int r_type, dynamic, shared; -{ - switch (r_type) + /* Some compilers warn about a Boolean-looking expression being + used in a switch. The explicit cast silences them. */ + switch ((int) (!dynamic && !bfd_link_pic (info->link_info))) { - /* May appear in GOT entries. */ - case R_ALPHA_TLSGD: - return (dynamic ? 2 : shared ? 1 : 0); - case R_ALPHA_TLSLDM: - return shared; - case R_ALPHA_LITERAL: - case R_ALPHA_GOTTPREL: - return dynamic || shared; - case R_ALPHA_GOTDTPREL: - return dynamic; + case 1: + { + bfd_vma tp_base; + bfd_signed_vma disp; - /* May appear in data sections. */ - case R_ALPHA_REFLONG: - case R_ALPHA_REFQUAD: - case R_ALPHA_TPREL64: - return dynamic || shared; + BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); + tp_base = alpha_get_tprel_base (info->link_info); + disp = symval - tp_base; - /* Everything else is illegal. We'll issue an error during - relocate_section. */ - default: - return 0; - } -} + if (disp >= -0x8000 && disp < 0x8000) + { + insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (31 << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); -/* Work out the sizes of the dynamic relocation entries. */ + 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 + && pos[0] + 4 == pos[1]) + { + insn = (OP_LDAH << 26) | (tlsgd_reg << 21) | (31 << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); + insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (tlsgd_reg << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]); -static bfd_boolean -elf64_alpha_calc_dynrel_sizes (h, info) - struct alpha_elf_link_hash_entry *h; - struct bfd_link_info *info; -{ - bfd_boolean dynamic; - struct alpha_elf_reloc_entry *relent; - unsigned long entries; + 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 */ - if (h->root.root.type == bfd_link_hash_warning) - h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; + default: + use_gottprel = TRUE; - /* If the symbol was defined as a common symbol in a regular object - file, and there was no definition in any dynamic object, then the - linker will have allocated space for the symbol in a common - section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been - set. This is done for dynamic symbols in - elf_adjust_dynamic_symbol but this is not done for non-dynamic - symbols, somehow. */ - if (!h->root.def_regular - && h->root.ref_regular - && !h->root.def_dynamic - && (h->root.root.type == bfd_link_hash_defined - || h->root.root.type == bfd_link_hash_defweak) - && !(h->root.root.u.def.section->owner->flags & DYNAMIC)) - h->root.def_regular = 1; + insn = (OP_LDQ << 26) | (tlsgd_reg << 21) | (29 << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); - /* 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. */ + 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; + } - dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); + bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]); - for (relent = h->reloc_entries; relent; relent = relent->next) - { - entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic, - info->shared); - if (entries) - { - relent->srel->size += - entries * sizeof (Elf64_External_Rela) * relent->count; - if (relent->reltext) - info->flags |= DT_TEXTREL; - } - } + insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]); - return TRUE; -} + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]); -/* Set the sizes of the dynamic relocation sections. */ + irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); -static bfd_boolean -elf64_alpha_size_rela_got_section (info) - struct bfd_link_info *info; -{ - unsigned long entries; - bfd *i, *dynobj; - asection *srel; + 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); - /* Shared libraries often require RELATIVE relocs, and some relocs - require attention for the main application as well. */ + info->changed_contents = TRUE; + info->changed_relocs = TRUE; - entries = 0; - for (i = alpha_elf_hash_table(info)->got_list; - i ; i = alpha_elf_tdata(i)->got_link_next) + /* Reduce the use count on the TLSGD/TLSLDM relocation. */ + if (--info->gotent->use_count == 0) { - bfd *j; + 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; + } - for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) + /* 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 { - struct alpha_elf_got_entry **local_got_entries, *gotent; - int k, n; + 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; - local_got_entries = alpha_elf_tdata(j)->local_got_entries; - if (!local_got_entries) - continue; + tprel_gotent->next = *info->first_gotent; + *info->first_gotent = tprel_gotent; - for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) - for (gotent = local_got_entries[k]; - gotent ; gotent = gotent->next) - if (gotent->use_count > 0) - entries += (alpha_dynamic_entries_for_reloc - (gotent->reloc_type, 0, info->shared)); - } - } + 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; + } - dynobj = elf_hash_table(info)->dynobj; - srel = bfd_get_section_by_name (dynobj, ".rela.got"); - if (!srel) - { - BFD_ASSERT (entries == 0); - return TRUE; + tprel_gotent->use_count = 1; + tprel_gotent->reloc_type = R_ALPHA_GOTTPREL; + } } - srel->size = sizeof (Elf64_External_Rela) * entries; - - /* Now do the non-local symbols. */ - alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), - elf64_alpha_size_rela_got_1, 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; +elf64_alpha_relax_section (bfd *abfd, asection *sec, + struct bfd_link_info *link_info, bfd_boolean *again) { - 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; + 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; + struct alpha_elf_link_hash_table * htab; + int relax_pass; - /* 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. */ + htab = alpha_elf_hash_table (link_info); + if (htab == NULL) + return FALSE; - dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); + /* There's nothing to change, yet. */ + *again = FALSE; - 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 (bfd_link_relocatable (link_info) + || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC)) + != (SEC_CODE | SEC_RELOC | SEC_ALLOC)) + || sec->reloc_count == 0) + return TRUE; - /* 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--; + BFD_ASSERT (is_alpha_elf (abfd)); + relax_pass = link_info->relax_pass; - if (entries > 0) + /* Make sure our GOT and PLT tables are up-to-date. */ + if (htab->relax_trip != link_info->relax_trip) { - 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; + htab->relax_trip = link_info->relax_trip; + + /* This should never fail after the initial round, since the only error + is GOT overflow, and relaxation only shrinks the table. However, we + may only merge got sections during the first pass. If we merge + sections after we've created GPREL relocs, the GP for the merged + section backs up which may put the relocs out of range. */ + if (!elf64_alpha_size_got_sections (link_info, relax_pass == 0)) + abort (); + if (elf_hash_table (link_info)->dynamic_sections_created) + { + elf64_alpha_size_plt_section (link_info); + elf64_alpha_size_rela_got_section (link_info); + } } - return TRUE; -} + symtab_hdr = &elf_symtab_hdr (abfd); + local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; -/* Set the sizes of the dynamic sections. */ + /* Load the relocations for this section. */ + internal_relocs = (_bfd_elf_link_read_relocs + (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, + link_info->keep_memory)); + if (internal_relocs == NULL) + return FALSE; -static bfd_boolean -elf64_alpha_size_dynamic_sections (output_bfd, info) - bfd *output_bfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info; -{ - bfd *dynobj; - asection *s; - bfd_boolean relplt; + 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; - dynobj = elf_hash_table(info)->dynobj; - BFD_ASSERT(dynobj != NULL); + /* 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); + } - if (elf_hash_table (info)->dynamic_sections_created) + /* Get the section contents. */ + if (elf_section_data (sec)->this_hdr.contents != NULL) + info.contents = elf_section_data (sec)->this_hdr.contents; + else { - /* Set the contents of the .interp section to the interpreter. */ - if (info->executable) - { - s = bfd_get_section_by_name (dynobj, ".interp"); - BFD_ASSERT (s != NULL); - s->size = sizeof ELF_DYNAMIC_INTERPRETER; - s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; + 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. */ + if (r_type != R_ALPHA_LITERAL) + { + /* We complete everything except LITERAL in the first pass. */ + if (relax_pass != 0) + continue; + if (r_type == R_ALPHA_TLSLDM) + { + /* The symbol for a TLSLDM reloc is ignored. Collapse the + reloc to the STN_UNDEF (0) symbol so that they all match. */ + r_symndx = STN_UNDEF; + } + else if (r_type != R_ALPHA_GOTDTPREL + && r_type != R_ALPHA_GOTTPREL + && r_type != R_ALPHA_TLSGD) + continue; } - /* Now that we've seen all of the input files, we can decide which - symbols need dynamic relocation entries and which don't. We've - collected information in check_relocs that we can now apply to - size the dynamic relocation sections. */ - alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), - elf64_alpha_calc_dynrel_sizes, info); + /* 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; - elf64_alpha_size_rela_got_section (info); - } - /* else we're not dynamic and by definition we don't need such things. */ + /* 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); - /* The check_relocs and adjust_dynamic_symbol entry points have - determined the sizes of the various dynamic sections. Allocate - memory for them. */ - relplt = FALSE; - for (s = dynobj->sections; s != NULL; s = s->next) - { - const char *name; - bfd_boolean strip; + 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 (!(s->flags & SEC_LINKER_CREATED)) - continue; + /* If the symbol is undefined, we can't do anything with it. */ + if (h->root.root.type == bfd_link_hash_undefined) + continue; - /* It's OK to base decisions on the section name, because none - of the dynobj section names depend upon the input files. */ - name = bfd_get_section_name (dynobj, s); + /* 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; + } - /* If we don't need this section, strip it from the output file. - This is to handle .rela.bss and .rela.plt. We must create it - in create_dynamic_sections, because it must be created before - the linker maps input sections to output sections. The - linker does that before adjust_dynamic_symbol is called, and - it is that function which decides whether anything needs to - go into these sections. */ + /* 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; - strip = FALSE; + symval += info.tsec->output_section->vma + info.tsec->output_offset; + symval += irel->r_addend; - if (strncmp (name, ".rela", 5) == 0) + switch (r_type) { - strip = (s->size == 0); + case R_ALPHA_LITERAL: + BFD_ASSERT(info.gotent != NULL); - if (!strip) + /* 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 (strcmp(name, ".rela.plt") == 0) - relplt = TRUE; - - /* We use the reloc_count field as a counter if we need - to copy relocs into the output file. */ - s->reloc_count = 0; + if (!elf64_alpha_relax_with_lituse (&info, symval, irel)) + goto error_return; } - } - else if (strcmp (name, ".plt") != 0) - { - /* It's not one of our dynamic sections, so don't allocate space. */ - continue; - } + else + { + if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) + goto error_return; + } + break; - if (strip) - s->flags |= SEC_EXCLUDE; - else - { - /* Allocate memory for the section contents. */ - s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); - if (s->contents == NULL && s->size != 0) - return FALSE; + 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 (elf_hash_table (info)->dynamic_sections_created) + if (isymbuf != NULL + && symtab_hdr->contents != (unsigned char *) isymbuf) { - /* Add some entries to the .dynamic section. We fill in the - values later, in elf64_alpha_finish_dynamic_sections, but we - must add the entries now so that we get the correct size for - the .dynamic section. The DT_DEBUG entry is filled in by the - dynamic linker and used by the debugger. */ -#define add_dynamic_entry(TAG, VAL) \ - _bfd_elf_add_dynamic_entry (info, TAG, VAL) - - if (info->executable) + if (!link_info->keep_memory) + free (isymbuf); + else { - if (!add_dynamic_entry (DT_DEBUG, 0)) - return FALSE; + /* Cache the symbols for elf_link_input_bfd. */ + symtab_hdr->contents = (unsigned char *) isymbuf; } + } - if (relplt) + 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 { - if (!add_dynamic_entry (DT_PLTGOT, 0) - || !add_dynamic_entry (DT_PLTRELSZ, 0) - || !add_dynamic_entry (DT_PLTREL, DT_RELA) - || !add_dynamic_entry (DT_JMPREL, 0)) - return FALSE; + /* Cache the section contents for elf_link_input_bfd. */ + elf_section_data (sec)->this_hdr.contents = info.contents; } + } - if (!add_dynamic_entry (DT_RELA, 0) - || !add_dynamic_entry (DT_RELASZ, 0) - || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) - return FALSE; - - if (info->flags & DF_TEXTREL) - { - if (!add_dynamic_entry (DT_TEXTREL, 0)) - return FALSE; - } + if (elf_section_data (sec)->relocs != internal_relocs) + { + if (!info.changed_relocs) + free (internal_relocs); + else + elf_section_data (sec)->relocs = internal_relocs; } -#undef add_dynamic_entry + + *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; @@ -4147,23 +4122,22 @@ 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; Elf_Internal_Rela *relend; + struct elf_link_hash_entry **sym_hashes; bfd_boolean ret_val = TRUE; - symtab_hdr_sh_info = elf_tdata (input_bfd)->symtab_hdr.sh_info; + symtab_hdr_sh_info = elf_symtab_hdr (input_bfd).sh_info; + sym_hashes = elf_sym_hashes (input_bfd); relend = relocs + input_section->reloc_count; for (rel = relocs; rel < relend; rel++) @@ -4173,7 +4147,7 @@ elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, input_section, asection *sec; unsigned long r_type; - r_type = ELF64_R_TYPE(rel->r_info); + r_type = ELF64_R_TYPE (rel->r_info); if (r_type >= R_ALPHA_max) { (*_bfd_error_handler) @@ -4184,22 +4158,43 @@ elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, input_section, continue; } - r_symndx = ELF64_R_SYM(rel->r_info); - /* The symbol associated with GPDISP and LITUSE is immaterial. Only the addend is significant. */ if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE) continue; + r_symndx = ELF64_R_SYM (rel->r_info); if (r_symndx < symtab_hdr_sh_info) { sym = local_syms + r_symndx; - if (ELF_ST_TYPE(sym->st_info) == STT_SECTION) - { - sec = local_sections[r_symndx]; - rel->r_addend += sec->output_offset + sym->st_value; - } + sec = local_sections[r_symndx]; + } + else + { + struct elf_link_hash_entry *h; + + h = sym_hashes[r_symndx - symtab_hdr_sh_info]; + + while (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + if (h->root.type != bfd_link_hash_defined + && h->root.type != bfd_link_hash_defweak) + continue; + + sym = NULL; + sec = h->root.u.def.section; } + + if (sec != NULL && discarded_section (sec)) + RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, + rel, 1, relend, + elf64_alpha_howto_table + r_type, 0, + contents); + + if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) + rel->r_addend += sec->output_offset; } return ret_val; @@ -4208,16 +4203,11 @@ 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; @@ -4227,10 +4217,11 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, bfd_vma gp, tp_base, dtp_base; struct alpha_elf_got_entry **local_got_entries; bfd_boolean ret_val; - const char *section_name; + + BFD_ASSERT (is_alpha_elf (input_bfd)); /* Handle relocatable links with a smaller loop. */ - if (info->relocatable) + if (bfd_link_relocatable (info)) return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, input_section, contents, relocs, local_syms, local_sections); @@ -4239,19 +4230,25 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, ret_val = TRUE; - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + symtab_hdr = &elf_symtab_hdr (input_bfd); dynobj = elf_hash_table (info)->dynobj; if (dynobj) - srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + srelgot = bfd_get_linker_section (dynobj, ".rela.got"); else srelgot = NULL; - section_name = (bfd_elf_string_from_elf_section - (input_bfd, elf_elfheader(input_bfd)->e_shstrndx, - elf_section_data(input_section)->rel_hdr.sh_name)); - BFD_ASSERT(section_name != NULL); - srel = bfd_get_section_by_name (dynobj, section_name); + if (input_section->flags & SEC_ALLOC) + { + const char *section_name; + section_name = (bfd_elf_string_from_elf_section + (input_bfd, elf_elfheader(input_bfd)->e_shstrndx, + _bfd_elf_single_rel_hdr (input_section)->sh_name)); + BFD_ASSERT(section_name != NULL); + srel = bfd_get_linker_section (dynobj, section_name); + } + else + srel = NULL; /* Find the gp value for this input bfd. */ gotobj = alpha_elf_tdata (input_bfd)->gotobj; @@ -4296,6 +4293,7 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, bfd_vma value; bfd_vma addend; bfd_boolean dynamic_symbol_p; + bfd_boolean unresolved_reloc = FALSE; bfd_boolean undef_weak_ref = FALSE; unsigned long r_type; @@ -4314,9 +4312,9 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, r_symndx = ELF64_R_SYM(rel->r_info); /* The symbol for a TLSLDM reloc is ignored. Collapse the - reloc to the 0 symbol so that they all match. */ + reloc to the STN_UNDEF (0) symbol so that they all match. */ if (r_type == R_ALPHA_TLSLDM) - r_symndx = 0; + r_symndx = STN_UNDEF; if (r_symndx < symtab_hdr->sh_info) { @@ -4326,17 +4324,17 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, msec = sec; value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel); - /* If this is a tp-relative relocation against sym 0, + /* If this is a tp-relative relocation against sym STN_UNDEF (0), this is hackery from relax_section. Force the value to - be the tls base. */ - if (r_symndx == 0 + be the tls module base. */ + if (r_symndx == STN_UNDEF && (r_type == R_ALPHA_TLSLDM || r_type == R_ALPHA_GOTTPREL || r_type == R_ALPHA_TPREL64 || r_type == R_ALPHA_TPRELHI || r_type == R_ALPHA_TPRELLO || r_type == R_ALPHA_TPREL16)) - value = tp_base; + value = dtp_base; if (local_got_entries) gotent = local_got_entries[r_symndx]; @@ -4347,7 +4345,7 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, unless it has been done already. */ if ((sec->flags & SEC_MERGE) && ELF_ST_TYPE (sym->st_info) == STT_SECTION - && sec->sec_info_type == ELF_INFO_TYPE_MERGE + && sec->sec_info_type == SEC_INFO_TYPE_MERGE && gotent && !gotent->reloc_xlated) { @@ -4376,15 +4374,14 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, } else { - bfd_boolean warned; - bfd_boolean unresolved_reloc; + bfd_boolean warned, ignored; struct elf_link_hash_entry *hh; struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, r_symndx, symtab_hdr, sym_hashes, hh, sec, value, - unresolved_reloc, warned); + unresolved_reloc, warned, ignored); if (warned) continue; @@ -4399,6 +4396,10 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, gotent = h->got_entries; } + if (sec != NULL && discarded_section (sec)) + RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, + rel, 1, relend, howto, 0, contents); + addend = rel->r_addend; value += addend; @@ -4445,7 +4446,9 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, /* If the symbol has been forced local, output a RELATIVE reloc, otherwise it will be handled in finish_dynamic_symbol. */ - if (info->shared && !dynamic_symbol_p) + if (bfd_link_pic (info) + && !dynamic_symbol_p + && !undef_weak_ref) elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, gotent->got_offset, 0, R_ALPHA_RELATIVE, value); @@ -4458,18 +4461,6 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, goto default_reloc; case R_ALPHA_GPREL32: - /* If the target section was a removed linkonce section, - r_symndx will be zero. In this case, assume that the - switch will not be used, so don't fill it in. If we - do nothing here, we'll get relocation truncated messages, - due to the placement of the application above 4GB. */ - if (r_symndx == 0) - { - r = bfd_reloc_ok; - break; - } - /* FALLTHRU */ - case R_ALPHA_GPREL16: case R_ALPHA_GPRELLOW: if (dynamic_symbol_p) @@ -4607,7 +4598,7 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, else if (r_type == R_ALPHA_TPREL64) { BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); - if (!info->shared) + if (!bfd_link_dll (info)) { value -= tp_base; goto default_reloc; @@ -4615,9 +4606,15 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, dynindx = 0; dynaddend = value - dtp_base; } - else if (info->shared - && r_symndx != 0 - && (input_section->flags & SEC_ALLOC)) + else if (bfd_link_pic (info) + && r_symndx != STN_UNDEF + && (input_section->flags & SEC_ALLOC) + && !undef_weak_ref + && !(unresolved_reloc + && (_bfd_elf_section_offset (output_bfd, info, + input_section, + rel->r_offset) + == (bfd_vma) -1))) { if (r_type == R_ALPHA_REFLONG) { @@ -4634,9 +4631,10 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, else goto default_reloc; - elf64_alpha_emit_dynrel (output_bfd, info, input_section, - srel, rel->r_offset, dynindx, - dyntype, dynaddend); + if (input_section->flags & SEC_ALLOC) + elf64_alpha_emit_dynrel (output_bfd, info, input_section, + srel, rel->r_offset, dynindx, + dyntype, dynaddend); } goto default_reloc; @@ -4650,11 +4648,24 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, input_bfd, h->root.root.root.string); ret_val = FALSE; } + else if (bfd_link_pic (info) + && undef_weak_ref) + { + (*_bfd_error_handler) + (_("%B: pc-relative relocation against undefined weak symbol %s"), + input_bfd, h->root.root.root.string); + ret_val = FALSE; + } + /* ??? .eh_frame references to discarded sections will be smashed to relocations against SHN_UNDEF. The .eh_frame format allows NULL to be encoded as 0 in any format, so this works here. */ - if (r_symndx == 0) + if (r_symndx == STN_UNDEF + || (unresolved_reloc + && _bfd_elf_section_offset (output_bfd, info, + input_section, + rel->r_offset) == (bfd_vma) -1)) howto = (elf64_alpha_howto_table + (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG)); goto default_reloc; @@ -4671,13 +4682,14 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, gotent->reloc_done = 1; /* Note that the module index for the main program is 1. */ - bfd_put_64 (output_bfd, !info->shared && !dynamic_symbol_p, + bfd_put_64 (output_bfd, + !bfd_link_pic (info) && !dynamic_symbol_p, sgot->contents + gotent->got_offset); /* If the symbol has been forced local, output a DTPMOD64 reloc, otherwise it will be handled in finish_dynamic_symbol. */ - if (info->shared && !dynamic_symbol_p) + if (bfd_link_pic (info) && !dynamic_symbol_p) elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, gotent->got_offset, 0, R_ALPHA_DTPMOD64, 0); @@ -4718,7 +4730,7 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, case R_ALPHA_TPRELHI: case R_ALPHA_TPRELLO: case R_ALPHA_TPREL16: - if (info->shared) + if (bfd_link_dll (info)) { (*_bfd_error_handler) (_("%B: TLS local exec code cannot be linked into shared objects"), @@ -4756,7 +4768,7 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); if (r_type == R_ALPHA_GOTDTPREL) value -= dtp_base; - else if (!info->shared) + else if (!bfd_link_pic (info)) value -= tp_base; else { @@ -4799,7 +4811,7 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, if (r_symndx < symtab_hdr->sh_info && sec != NULL && howto->pc_relative - && elf_discarded_section (sec)) + && discarded_section (sec)) break; if (h != NULL) @@ -4813,11 +4825,9 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, if (*name == '\0') name = bfd_section_name (input_bfd, sec); } - if (! ((*info->callbacks->reloc_overflow) - (info, (h ? &h->root.root : NULL), name, howto->name, - (bfd_vma) 0, input_bfd, input_section, - rel->r_offset))) - ret_val = FALSE; + (*info->callbacks->reloc_overflow) + (info, (h ? &h->root.root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, rel->r_offset); } break; @@ -4834,15 +4844,14 @@ 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) { + struct alpha_elf_link_hash_entry *ah = (struct alpha_elf_link_hash_entry *)h; bfd *dynobj = elf_hash_table(info)->dynobj; - if (h->plt.offset != MINUS_ONE) + if (h->needs_plt) { /* Fill in the .plt entry for this symbol. */ asection *splt, *sgot, *srel; @@ -4854,83 +4863,71 @@ elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym) BFD_ASSERT (h->dynindx != -1); - /* The first .got entry will be updated by the .plt with the - address of the target function. */ - gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries; - BFD_ASSERT (gotent && gotent->addend == 0); - - splt = bfd_get_section_by_name (dynobj, ".plt"); + splt = bfd_get_linker_section (dynobj, ".plt"); BFD_ASSERT (splt != NULL); - srel = bfd_get_section_by_name (dynobj, ".rela.plt"); + srel = bfd_get_linker_section (dynobj, ".rela.plt"); BFD_ASSERT (srel != NULL); - sgot = alpha_elf_tdata (gotent->gotobj)->got; - BFD_ASSERT (sgot != NULL); - - got_addr = (sgot->output_section->vma - + sgot->output_offset - + gotent->got_offset); - plt_addr = (splt->output_section->vma - + splt->output_offset - + h->plt.offset); - - plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; - - /* Fill in the entry in the procedure linkage table. */ - { - bfd_vma insn1, insn2, insn3; - insn1 = PLT_ENTRY_WORD1 | ((-(h->plt.offset + 4) >> 2) & 0x1fffff); - insn2 = PLT_ENTRY_WORD2; - insn3 = PLT_ENTRY_WORD3; - - bfd_put_32 (output_bfd, insn1, splt->contents + h->plt.offset); - bfd_put_32 (output_bfd, insn2, splt->contents + h->plt.offset + 4); - bfd_put_32 (output_bfd, insn3, splt->contents + h->plt.offset + 8); - } + for (gotent = ah->got_entries; gotent ; gotent = gotent->next) + if (gotent->reloc_type == R_ALPHA_LITERAL + && gotent->use_count > 0) + { + unsigned int insn; + int disp; - /* Fill in the entry in the .rela.plt section. */ - outrel.r_offset = got_addr; - outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT); - outrel.r_addend = 0; + sgot = alpha_elf_tdata (gotent->gotobj)->got; + BFD_ASSERT (sgot != NULL); - loc = srel->contents + plt_index * sizeof (Elf64_External_Rela); - bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + BFD_ASSERT (gotent->got_offset != -1); + BFD_ASSERT (gotent->plt_offset != -1); - if (!h->def_regular) - { - /* Mark the symbol as undefined, rather than as defined in the - .plt section. Leave the value alone. */ - sym->st_shndx = SHN_UNDEF; - } + got_addr = (sgot->output_section->vma + + sgot->output_offset + + gotent->got_offset); + plt_addr = (splt->output_section->vma + + splt->output_offset + + gotent->plt_offset); - /* Fill in the entries in the .got. */ - bfd_put_64 (output_bfd, plt_addr, sgot->contents + gotent->got_offset); + plt_index = (gotent->plt_offset-PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; - /* Subsequent .got entries will continue to bounce through the .plt. */ - if (gotent->next) - { - srel = bfd_get_section_by_name (dynobj, ".rela.got"); - BFD_ASSERT (! info->shared || srel != NULL); + /* Fill in the entry in the procedure linkage table. */ + if (elf64_alpha_use_secureplt) + { + disp = (PLT_HEADER_SIZE - 4) - (gotent->plt_offset + 4); + insn = INSN_AD (INSN_BR, 31, disp); + bfd_put_32 (output_bfd, insn, + splt->contents + gotent->plt_offset); - gotent = gotent->next; - do - { - sgot = alpha_elf_tdata(gotent->gotobj)->got; - BFD_ASSERT(sgot != NULL); - BFD_ASSERT(gotent->addend == 0); + plt_index = ((gotent->plt_offset - NEW_PLT_HEADER_SIZE) + / NEW_PLT_ENTRY_SIZE); + } + else + { + disp = -(gotent->plt_offset + 4); + insn = INSN_AD (INSN_BR, 28, disp); + bfd_put_32 (output_bfd, insn, + splt->contents + gotent->plt_offset); + bfd_put_32 (output_bfd, INSN_UNOP, + splt->contents + gotent->plt_offset + 4); + bfd_put_32 (output_bfd, INSN_UNOP, + splt->contents + gotent->plt_offset + 8); + + plt_index = ((gotent->plt_offset - OLD_PLT_HEADER_SIZE) + / OLD_PLT_ENTRY_SIZE); + } - bfd_put_64 (output_bfd, plt_addr, - sgot->contents + gotent->got_offset); + /* Fill in the entry in the .rela.plt section. */ + outrel.r_offset = got_addr; + outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT); + outrel.r_addend = 0; - if (info->shared) - elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, - gotent->got_offset, 0, - R_ALPHA_RELATIVE, plt_addr); + loc = srel->contents + plt_index * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); - gotent = gotent->next; - } - while (gotent != NULL); - } + /* Fill in the entry in the .got. */ + bfd_put_64 (output_bfd, plt_addr, + sgot->contents + gotent->got_offset); + } } else if (alpha_elf_dynamic_symbol_p (h, info)) { @@ -4938,7 +4935,7 @@ elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym) asection *srel; struct alpha_elf_got_entry *gotent; - srel = bfd_get_section_by_name (dynobj, ".rela.got"); + srel = bfd_get_linker_section (dynobj, ".rela.got"); BFD_ASSERT (srel != NULL); for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries; @@ -4973,21 +4970,21 @@ elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym) abort (); } - elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, + elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, gotent->got_offset, h->dynindx, r_type, gotent->addend); if (gotent->reloc_type == R_ALPHA_TLSGD) - elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, + elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, gotent->got_offset + 8, h->dynindx, R_ALPHA_DTPREL64, gotent->addend); } } /* Mark some specially defined symbols as absolute. */ - if (strcmp (h->root.root.string, "_DYNAMIC") == 0 - || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 - || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) + if (h == elf_hash_table (info)->hdynamic + || h == elf_hash_table (info)->hgot + || h == elf_hash_table (info)->hplt) sym->st_shndx = SHN_ABS; return TRUE; @@ -4996,45 +4993,57 @@ 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; dynobj = elf_hash_table (info)->dynobj; - sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); + sdyn = bfd_get_linker_section (dynobj, ".dynamic"); if (elf_hash_table (info)->dynamic_sections_created) { - asection *splt; + asection *splt, *sgotplt, *srelaplt; Elf64_External_Dyn *dyncon, *dynconend; + bfd_vma plt_vma, gotplt_vma; - splt = bfd_get_section_by_name (dynobj, ".plt"); + splt = bfd_get_linker_section (dynobj, ".plt"); + srelaplt = bfd_get_linker_section (dynobj, ".rela.plt"); BFD_ASSERT (splt != NULL && sdyn != NULL); + plt_vma = splt->output_section->vma + splt->output_offset; + + gotplt_vma = 0; + if (elf64_alpha_use_secureplt) + { + sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); + BFD_ASSERT (sgotplt != NULL); + if (sgotplt->size > 0) + gotplt_vma = sgotplt->output_section->vma + sgotplt->output_offset; + } + dyncon = (Elf64_External_Dyn *) sdyn->contents; dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); for (; dyncon < dynconend; dyncon++) { Elf_Internal_Dyn dyn; - const char *name; - asection *s; bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); switch (dyn.d_tag) { case DT_PLTGOT: - name = ".plt"; - goto get_vma; + dyn.d_un.d_ptr + = elf64_alpha_use_secureplt ? gotplt_vma : plt_vma; + break; case DT_PLTRELSZ: - name = ".rela.plt"; - goto get_size; + dyn.d_un.d_val = srelaplt ? srelaplt->size : 0; + break; case DT_JMPREL: - name = ".rela.plt"; - goto get_vma; + dyn.d_un.d_ptr = srelaplt ? (srelaplt->output_section->vma + + srelaplt->output_offset) : 0; + break; case DT_RELASZ: /* My interpretation of the TIS v1.1 ELF document indicates @@ -5042,36 +5051,69 @@ elf64_alpha_finish_dynamic_sections (output_bfd, info) the rest of the BFD does. It is, however, what the glibc ld.so wants. Do this fixup here until we found out who is right. */ - s = bfd_get_section_by_name (output_bfd, ".rela.plt"); - if (s) - dyn.d_un.d_val -= s->size; - break; - - get_vma: - s = bfd_get_section_by_name (output_bfd, name); - dyn.d_un.d_ptr = (s ? s->vma : 0); - break; - - get_size: - s = bfd_get_section_by_name (output_bfd, name); - dyn.d_un.d_val = s->size; + if (srelaplt) + dyn.d_un.d_val -= srelaplt->size; break; } bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); } - /* Initialize the PLT0 entry. */ + /* Initialize the plt header. */ if (splt->size > 0) { - bfd_put_32 (output_bfd, PLT_HEADER_WORD1, splt->contents); - bfd_put_32 (output_bfd, PLT_HEADER_WORD2, splt->contents + 4); - bfd_put_32 (output_bfd, PLT_HEADER_WORD3, splt->contents + 8); - bfd_put_32 (output_bfd, PLT_HEADER_WORD4, splt->contents + 12); + unsigned int insn; + int ofs; + + if (elf64_alpha_use_secureplt) + { + ofs = gotplt_vma - (plt_vma + PLT_HEADER_SIZE); + + insn = INSN_ABC (INSN_SUBQ, 27, 28, 25); + bfd_put_32 (output_bfd, insn, splt->contents); + + insn = INSN_ABO (INSN_LDAH, 28, 28, (ofs + 0x8000) >> 16); + bfd_put_32 (output_bfd, insn, splt->contents + 4); + + insn = INSN_ABC (INSN_S4SUBQ, 25, 25, 25); + bfd_put_32 (output_bfd, insn, splt->contents + 8); + + insn = INSN_ABO (INSN_LDA, 28, 28, ofs); + bfd_put_32 (output_bfd, insn, splt->contents + 12); + + insn = INSN_ABO (INSN_LDQ, 27, 28, 0); + bfd_put_32 (output_bfd, insn, splt->contents + 16); + + insn = INSN_ABC (INSN_ADDQ, 25, 25, 25); + bfd_put_32 (output_bfd, insn, splt->contents + 20); + + insn = INSN_ABO (INSN_LDQ, 28, 28, 8); + bfd_put_32 (output_bfd, insn, splt->contents + 24); + + insn = INSN_AB (INSN_JMP, 31, 27); + bfd_put_32 (output_bfd, insn, splt->contents + 28); + + insn = INSN_AD (INSN_BR, 28, -PLT_HEADER_SIZE); + bfd_put_32 (output_bfd, insn, splt->contents + 32); + } + else + { + insn = INSN_AD (INSN_BR, 27, 0); /* br $27, .+4 */ + bfd_put_32 (output_bfd, insn, splt->contents); + + insn = INSN_ABO (INSN_LDQ, 27, 27, 12); + bfd_put_32 (output_bfd, insn, splt->contents + 4); + + insn = INSN_UNOP; + bfd_put_32 (output_bfd, insn, splt->contents + 8); - /* The next two words will be filled in by ld.so */ - bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 16); - bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 24); + insn = INSN_AB (INSN_JMP, 27, 27); + bfd_put_32 (output_bfd, insn, splt->contents + 12); + + /* The next two words will be filled in by ld.so. */ + bfd_put_64 (output_bfd, 0, splt->contents + 16); + bfd_put_64 (output_bfd, 0, splt->contents + 24); + } elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0; } @@ -5085,9 +5127,7 @@ 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; @@ -5096,7 +5136,12 @@ elf64_alpha_final_link (abfd, info) const struct ecoff_debug_swap *swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; HDRR *symhdr = &debug.symbolic_header; - PTR mdebug_handle = NULL; + void * mdebug_handle = NULL; + struct alpha_elf_link_hash_table * htab; + + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return FALSE; /* Go through the sections and collect the mdebug information. */ mdebug_sec = NULL; @@ -5140,7 +5185,7 @@ elf64_alpha_final_link (abfd, info) debug.external_ext = debug.external_ext_end = NULL; mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); - if (mdebug_handle == (PTR) NULL) + if (mdebug_handle == NULL) return FALSE; if (1) @@ -5205,15 +5250,11 @@ elf64_alpha_final_link (abfd, info) input_section = p->u.indirect.section; input_bfd = input_section->owner; - if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour - || (get_elf_backend_data (input_bfd) - ->elf_backend_ecoff_debug_swap) == NULL) - { - /* I don't know what a non ALPHA ELF bfd would be - doing with a .mdebug section, but I don't really - want to deal with it. */ - continue; - } + if (! is_alpha_elf (input_bfd)) + /* I don't know what a non ALPHA ELF bfd would be + doing with a .mdebug section, but I don't really + want to deal with it. */ + continue; input_swap = (get_elf_backend_data (input_bfd) ->elf_backend_ecoff_debug_swap); @@ -5236,7 +5277,7 @@ elf64_alpha_final_link (abfd, info) interesting information, try to find the symbol in the linker global hash table and save the information for the output external symbols. */ - eraw_src = input_debug.external_ext; + eraw_src = (char *) input_debug.external_ext; eraw_end = (eraw_src + (input_debug.symbolic_header.iextMax * input_swap->external_ext_size)); @@ -5248,15 +5289,14 @@ elf64_alpha_final_link (abfd, info) const char *name; struct alpha_elf_link_hash_entry *h; - (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext); + (*input_swap->swap_ext_in) (input_bfd, eraw_src, &ext); if (ext.asym.sc == scNil || ext.asym.sc == scUndefined || ext.asym.sc == scSUndefined) continue; name = input_debug.ssext + ext.asym.iss; - h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info), - name, FALSE, FALSE, TRUE); + h = alpha_elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); if (h == NULL || h->esym.ifd != -2) continue; @@ -5296,7 +5336,7 @@ elf64_alpha_final_link (abfd, info) einfo.failed = FALSE; elf_link_hash_traverse (elf_hash_table (info), elf64_alpha_output_extsym, - (PTR) &einfo); + &einfo); if (einfo.failed) return FALSE; @@ -5320,7 +5360,7 @@ elf64_alpha_final_link (abfd, info) /* The .got subsections... */ { bfd *i, *dynobj = elf_hash_table(info)->dynobj; - for (i = alpha_elf_hash_table(info)->got_list; + for (i = htab->got_list; i != NULL; i = alpha_elf_tdata(i)->got_link_next) { @@ -5354,8 +5394,9 @@ 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 struct bfd_link_info *info ATTRIBUTE_UNUSED, + const asection *rel_sec ATTRIBUTE_UNUSED, + const Elf_Internal_Rela *rela) { switch ((int) ELF64_R_TYPE (rela->r_info)) { @@ -5370,44 +5411,11 @@ elf64_alpha_reloc_type_class (rela) } } -static struct bfd_elf_special_section const - alpha_special_sections_s[]= -{ - { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, - { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, - { NULL, 0, 0, 0, 0 } -}; - -static struct bfd_elf_special_section const * - elf64_alpha_special_sections[27] = +static const struct bfd_elf_special_section elf64_alpha_special_sections[] = { - NULL, /* 'a' */ - NULL, /* 'b' */ - NULL, /* 'c' */ - NULL, /* 'd' */ - NULL, /* 'e' */ - NULL, /* 'f' */ - NULL, /* 'g' */ - NULL, /* 'h' */ - NULL, /* 'i' */ - NULL, /* 'j' */ - NULL, /* 'k' */ - NULL, /* 'l' */ - NULL, /* 'm' */ - NULL, /* 'n' */ - NULL, /* 'o' */ - NULL, /* 'p' */ - NULL, /* 'q' */ - NULL, /* 'r' */ - alpha_special_sections_s, /* 's' */ - NULL, /* 't' */ - NULL, /* 'u' */ - NULL, /* 'v' */ - NULL, /* 'w' */ - NULL, /* 'x' */ - NULL, /* 'y' */ - NULL, /* 'z' */ - NULL /* other */ + { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, + { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, + { NULL, 0, 0, 0, 0 } }; /* ECOFF swapping routines. These are used when dealing with the @@ -5473,6 +5481,7 @@ static const struct elf_size_info alpha_elf_size_info = ELFCLASS64, EV_CURRENT, bfd_elf64_write_out_phdrs, bfd_elf64_write_shdrs_and_ehdr, + bfd_elf64_checksum_contents, bfd_elf64_write_relocs, bfd_elf64_swap_symbol_in, bfd_elf64_swap_symbol_out, @@ -5486,17 +5495,21 @@ static const struct elf_size_info alpha_elf_size_info = bfd_elf64_swap_reloca_out }; -#define TARGET_LITTLE_SYM bfd_elf64_alpha_vec +#define TARGET_LITTLE_SYM alpha_elf64_vec #define TARGET_LITTLE_NAME "elf64-alpha" #define ELF_ARCH bfd_arch_alpha +#define ELF_TARGET_ID ALPHA_ELF_DATA #define ELF_MACHINE_CODE EM_ALPHA #define ELF_MAXPAGESIZE 0x10000 +#define ELF_COMMONPAGESIZE 0x2000 #define bfd_elf64_bfd_link_hash_table_create \ elf64_alpha_bfd_link_hash_table_create #define bfd_elf64_bfd_reloc_type_lookup \ elf64_alpha_bfd_reloc_type_lookup +#define bfd_elf64_bfd_reloc_name_lookup \ + elf64_alpha_bfd_reloc_name_lookup #define elf_info_to_howto \ elf64_alpha_info_to_howto @@ -5521,16 +5534,26 @@ static const struct elf_size_info alpha_elf_size_info = #define elf_backend_add_symbol_hook \ elf64_alpha_add_symbol_hook +#define elf_backend_relocs_compatible \ + _bfd_elf_relocs_compatible +#define elf_backend_sort_relocs_p \ + elf64_alpha_sort_relocs_p #define elf_backend_check_relocs \ elf64_alpha_check_relocs #define elf_backend_create_dynamic_sections \ elf64_alpha_create_dynamic_sections #define elf_backend_adjust_dynamic_symbol \ elf64_alpha_adjust_dynamic_symbol +#define elf_backend_merge_symbol_attribute \ + elf64_alpha_merge_symbol_attribute +#define elf_backend_copy_indirect_symbol \ + elf64_alpha_copy_indirect_symbol #define elf_backend_always_size_sections \ elf64_alpha_always_size_sections #define elf_backend_size_dynamic_sections \ elf64_alpha_size_dynamic_sections +#define elf_backend_omit_section_dynsym \ + ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) #define elf_backend_relocate_section \ elf64_alpha_relocate_section #define elf_backend_finish_dynamic_symbol \ @@ -5542,6 +5565,10 @@ static const struct elf_size_info alpha_elf_size_info = #define elf_backend_reloc_type_class \ elf64_alpha_reloc_type_class +#define elf_backend_can_gc_sections 1 +#define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook +#define elf_backend_gc_sweep_hook elf64_alpha_gc_sweep_hook + #define elf_backend_ecoff_debug_swap \ &elf64_alpha_ecoff_debug_swap @@ -5562,28 +5589,26 @@ static const struct elf_size_info alpha_elf_size_info = /* FreeBSD support. */ #undef TARGET_LITTLE_SYM -#define TARGET_LITTLE_SYM bfd_elf64_alpha_freebsd_vec +#define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec #undef TARGET_LITTLE_NAME #define TARGET_LITTLE_NAME "elf64-alpha-freebsd" +#undef ELF_OSABI +#define ELF_OSABI ELFOSABI_FREEBSD /* The kernel recognizes executables as valid only if they carry a "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. */ i_ehdrp = elf_elfheader (abfd); /* Put an ABI label supported by FreeBSD >= 4.1. */ - i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD; + i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi; #ifdef OLD_FREEBSD_ABI_LABEL /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);