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Diffstat (limited to 'contrib/binutils/bfd/elf64-alpha.c')
| -rw-r--r-- | contrib/binutils/bfd/elf64-alpha.c | 3792 |
1 files changed, 3792 insertions, 0 deletions
diff --git a/contrib/binutils/bfd/elf64-alpha.c b/contrib/binutils/bfd/elf64-alpha.c new file mode 100644 index 000000000000..2800272dd602 --- /dev/null +++ b/contrib/binutils/bfd/elf64-alpha.c @@ -0,0 +1,3792 @@ +/* Alpha specific support for 64-bit ELF + Copyright 1996, 1997 Free Software Foundation, Inc. + Contributed by Richard Henderson <rth@tamu.edu>. + +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 +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 "libbfd.h" +#include "elf-bfd.h" + +#include "elf/alpha.h" + +#define ALPHAECOFF + +#define NO_COFF_RELOCS +#define NO_COFF_SYMBOLS +#define NO_COFF_LINENOS + +/* Get the ECOFF swapping routines. Needed for the debug information. */ +#include "coff/internal.h" +#include "coff/sym.h" +#include "coff/symconst.h" +#include "coff/ecoff.h" +#include "coff/alpha.h" +#include "aout/ar.h" +#include "libcoff.h" +#include "libecoff.h" +#define ECOFF_64 +#include "ecoffswap.h" + +static boolean elf64_alpha_mkobject PARAMS ((bfd *)); +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 *, Elf64_Internal_Rela *)); + +static boolean elf64_alpha_object_p + PARAMS((bfd *)); +static boolean elf64_alpha_section_from_shdr + PARAMS((bfd *, Elf64_Internal_Shdr *, char *)); +static boolean elf64_alpha_fake_sections + PARAMS((bfd *, Elf64_Internal_Shdr *, asection *)); +static int elf64_alpha_additional_program_headers + PARAMS((bfd *)); +static boolean elf64_alpha_create_got_section + PARAMS((bfd *, struct bfd_link_info *)); +static boolean elf64_alpha_create_dynamic_sections + PARAMS((bfd *, struct bfd_link_info *)); + +static boolean elf64_alpha_read_ecoff_info + PARAMS((bfd *, asection *, struct ecoff_debug_info *)); +static boolean elf64_alpha_is_local_label_name + PARAMS((bfd *, const char *)); +static boolean elf64_alpha_find_nearest_line + PARAMS((bfd *, asection *, asymbol **, bfd_vma, const char **, + const char **, unsigned int *)); + +#if defined(__STDC__) || defined(ALMOST_STDC) +struct alpha_elf_link_hash_entry; +#endif + +static boolean elf64_alpha_output_extsym + PARAMS((struct alpha_elf_link_hash_entry *, PTR)); + +static boolean elf64_alpha_can_merge_gots + PARAMS((bfd *, bfd *)); +static void elf64_alpha_merge_gots + PARAMS((bfd *, bfd *)); +static 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 void elf64_alpha_strip_section_from_output PARAMS ((asection *)); +static boolean elf64_alpha_always_size_sections + PARAMS ((bfd *, struct bfd_link_info *)); +static boolean elf64_alpha_calc_dynrel_sizes + PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *)); +static boolean elf64_alpha_check_relocs + PARAMS((bfd *, struct bfd_link_info *, asection *sec, + const Elf_Internal_Rela *)); +static boolean elf64_alpha_adjust_dynamic_symbol + PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *)); +static boolean elf64_alpha_size_dynamic_sections + PARAMS((bfd *, struct bfd_link_info *)); +static boolean elf64_alpha_adjust_dynindx + PARAMS((struct elf_link_hash_entry *, PTR)); +static boolean elf64_alpha_relocate_section + PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, + Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); +static boolean elf64_alpha_finish_dynamic_symbol + PARAMS((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, + Elf_Internal_Sym *)); +static boolean elf64_alpha_finish_dynamic_sections + PARAMS((bfd *, struct bfd_link_info *)); +static boolean elf64_alpha_final_link + PARAMS((bfd *, struct bfd_link_info *)); + + +struct alpha_elf_link_hash_entry +{ + struct elf_link_hash_entry root; + + /* External symbol information. */ + EXTR esym; + + /* Cumulative flags for all the .got entries. */ + int flags; + + /* Contexts (LITUSE) 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_FUNC 0x08 + + /* Used to implement multiple .got subsections. */ + struct alpha_elf_got_entry + { + struct alpha_elf_got_entry *next; + + /* which .got subsection? */ + bfd *gotobj; + + /* the addend in effect for this entry. */ + bfd_vma addend; + + /* the .got offset for this entry. */ + int got_offset; + + int flags; + + /* An additional flag. */ +#define ALPHA_ELF_GOT_ENTRY_RELOCS_DONE 0x10 + } *got_entries; + + /* 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; + + /* which .reloc section? */ + asection *srel; + + /* what kind of relocation? */ + unsigned long rtype; + + /* how many did we find? */ + unsigned long count; + } *reloc_entries; +}; + +/* Alpha ELF linker hash table. */ + +struct alpha_elf_link_hash_table +{ + struct elf_link_hash_table root; + + /* The head of a list of .got subsections linked through + alpha_elf_tdata(abfd)->got_link_next. */ + bfd *got_list; +}; + +/* Look up an entry in a Alpha ELF linker hash table. */ + +#define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \ + ((struct alpha_elf_link_hash_entry *) \ + elf_link_hash_lookup (&(table)->root, (string), (create), \ + (copy), (follow))) + +/* Traverse a Alpha ELF linker hash table. */ + +#define alpha_elf_link_hash_traverse(table, func, info) \ + (elf_link_hash_traverse \ + (&(table)->root, \ + (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (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)) + +/* 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? */ + +#define alpha_elf_dynamic_symbol_p(h, info) \ + (((info)->shared && !(info)->symbolic && (h)->dynindx != -1) \ + || (((h)->elf_link_hash_flags \ + & (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)) \ + == (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR))) + +/* 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; +{ + struct alpha_elf_link_hash_entry *ret = + (struct alpha_elf_link_hash_entry *) entry; + + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (ret == (struct alpha_elf_link_hash_entry *) NULL) + ret = ((struct alpha_elf_link_hash_entry *) + bfd_hash_allocate (table, + sizeof (struct alpha_elf_link_hash_entry))); + if (ret == (struct alpha_elf_link_hash_entry *) NULL) + return (struct bfd_hash_entry *) ret; + + /* Call the allocation method of the superclass. */ + ret = ((struct alpha_elf_link_hash_entry *) + _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, + table, string)); + if (ret != (struct alpha_elf_link_hash_entry *) NULL) + { + /* Set local fields. */ + memset (&ret->esym, 0, sizeof (EXTR)); + /* We use -2 as a marker to indicate that the information has + not been set. -1 means there is no associated ifd. */ + ret->esym.ifd = -2; + ret->flags = 0; + ret->got_entries = NULL; + ret->reloc_entries = NULL; + } + + return (struct bfd_hash_entry *) ret; +} + +/* Create a Alpha ELF linker hash table. */ + +static struct bfd_link_hash_table * +elf64_alpha_bfd_link_hash_table_create (abfd) + bfd *abfd; +{ + struct alpha_elf_link_hash_table *ret; + + ret = ((struct alpha_elf_link_hash_table *) + bfd_zalloc (abfd, sizeof (struct alpha_elf_link_hash_table))); + 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)) + { + bfd_release (abfd, ret); + return NULL; + } + + return &ret->root.root; +} + +/* We have some private fields hanging off of the elf_tdata structure. */ + +struct alpha_elf_obj_tdata +{ + struct elf_obj_tdata root; + + /* For every input file, these are the got entries for that object's + local symbols. */ + struct alpha_elf_got_entry ** local_got_entries; + + /* For every input file, this is the object that owns the got that + this input file uses. */ + bfd *gotobj; + + /* For every got, this is a linked list through the objects using this got */ + bfd *in_got_link_next; + + /* For every got, this is a link to the next got subsegment. */ + bfd *got_link_next; + + /* For every got, this is the section. */ + asection *got; + + /* For every got, this is it's total number of *entries*. */ + int total_got_entries; + + /* For every got, this is the sum of the number of *entries* required + to hold all of the member object's local got. */ + int n_local_got_entries; +}; + +#define alpha_elf_tdata(abfd) \ + ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any) + +static boolean +elf64_alpha_mkobject (abfd) + bfd *abfd; +{ + abfd->tdata.any = bfd_zalloc (abfd, sizeof (struct alpha_elf_obj_tdata)); + if (abfd->tdata.any == NULL) + return false; + return true; +} + +static boolean +elf64_alpha_object_p (abfd) + bfd *abfd; +{ + /* Allocate our special target data. */ + struct alpha_elf_obj_tdata *new_tdata; + new_tdata = bfd_zalloc (abfd, sizeof (struct alpha_elf_obj_tdata)); + if (new_tdata == NULL) + return false; + new_tdata->root = *abfd->tdata.elf_obj_data; + abfd->tdata.any = new_tdata; + + /* Set the right machine number for an Alpha ELF file. */ + return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0); +} + +/* 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) + +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 */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + elf64_alpha_reloc_nil, /* special_function */ + "NONE", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + true), /* pcrel_offset */ + + /* A 32 bit reference to a symbol. */ + HOWTO (R_ALPHA_REFLONG, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "REFLONG", /* name */ + false, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 64 bit reference to a symbol. */ + HOWTO (R_ALPHA_REFQUAD, /* type */ + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "REFQUAD", /* name */ + false, /* partial_inplace */ + MINUS_ONE, /* src_mask */ + MINUS_ONE, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 32 bit GP relative offset. This is just like REFLONG except + that when the value is used the value of the gp register will be + added in. */ + HOWTO (R_ALPHA_GPREL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "GPREL32", /* name */ + false, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Used for an instruction that refers to memory off the GP register. */ + HOWTO (R_ALPHA_LITERAL, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + 0, /* special_function */ + "ELF_LITERAL", /* name */ + false, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* This reloc only appears immediately following an ELF_LITERAL reloc. + It identifies a use of the literal. The symbol index is special: + 1 means the literal address is in the base register of a memory + format instruction; 2 means the literal address is in the byte + offset register of a byte-manipulation instruction; 3 means the + literal address is in the target register of a jsr instruction. + This does not actually do any relocation. */ + HOWTO (R_ALPHA_LITUSE, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + elf64_alpha_reloc_nil, /* special_function */ + "LITUSE", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* Load the gp register. This is always used for a ldah instruction + which loads the upper 16 bits of the gp register. The symbol + index of the GPDISP instruction is an offset in bytes to the lda + instruction that loads the lower 16 bits. The value to use for + the relocation is the difference between the GP value and the + current location; the load will always be done against a register + holding the current address. + + NOTE: Unlike ECOFF, partial in-place relocation is not done. If + any offset is present in the instructions, it is an offset from + the register to the ldah instruction. This lets us avoid any + stupid hackery like inventing a gp value to do partial relocation + against. Also unlike ECOFF, we do the whole relocation off of + the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd, + space consuming bit, that, since all the information was present + in the GPDISP_HI16 reloc. */ + HOWTO (R_ALPHA_GPDISP, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + elf64_alpha_reloc_gpdisp, /* special_function */ + "GPDISP", /* name */ + false, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + true), /* pcrel_offset */ + + /* A 21 bit branch. */ + HOWTO (R_ALPHA_BRADDR, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 21, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + 0, /* special_function */ + "BRADDR", /* name */ + false, /* partial_inplace */ + 0x1fffff, /* src_mask */ + 0x1fffff, /* dst_mask */ + true), /* pcrel_offset */ + + /* A hint for a jump to a register. */ + HOWTO (R_ALPHA_HINT, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 14, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + 0, /* special_function */ + "HINT", /* name */ + false, /* partial_inplace */ + 0x3fff, /* src_mask */ + 0x3fff, /* dst_mask */ + true), /* pcrel_offset */ + + /* 16 bit PC relative offset. */ + HOWTO (R_ALPHA_SREL16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + 0, /* special_function */ + "SREL16", /* name */ + false, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 32 bit PC relative offset. */ + HOWTO (R_ALPHA_SREL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + 0, /* special_function */ + "SREL32", /* name */ + false, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 64 bit PC relative offset. */ + HOWTO (R_ALPHA_SREL64, /* type */ + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + 0, /* special_function */ + "SREL64", /* name */ + false, /* partial_inplace */ + MINUS_ONE, /* src_mask */ + MINUS_ONE, /* dst_mask */ + false), /* pcrel_offset */ + + /* Push a value on the reloc evaluation stack. */ + HOWTO (ALPHA_R_OP_PUSH, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + elf64_alpha_reloc_bad, /* special_function */ + "OP_PUSH", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* Store the value from the stack at the given address. Store it in + a bitfield of size r_size starting at bit position r_offset. */ + HOWTO (ALPHA_R_OP_STORE, /* type */ + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + elf64_alpha_reloc_bad, /* special_function */ + "OP_STORE", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + MINUS_ONE, /* dst_mask */ + false), /* pcrel_offset */ + + /* Subtract the reloc address from the value on the top of the + relocation stack. */ + HOWTO (ALPHA_R_OP_PSUB, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + elf64_alpha_reloc_bad, /* special_function */ + "OP_PSUB", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* Shift the value on the top of the relocation stack right by the + given value. */ + HOWTO (ALPHA_R_OP_PRSHIFT, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + elf64_alpha_reloc_bad, /* special_function */ + "OP_PRSHIFT", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* Misc ELF relocations. */ + HOWTO (R_ALPHA_COPY, + 0, + 0, + 0, + false, + 0, + complain_overflow_dont, + bfd_elf_generic_reloc, + "COPY", + false, + 0, + 0, + true), + + HOWTO (R_ALPHA_GLOB_DAT, + 0, + 0, + 0, + false, + 0, + complain_overflow_dont, + bfd_elf_generic_reloc, + "GLOB_DAT", + false, + 0, + 0, + true), + + HOWTO (R_ALPHA_JMP_SLOT, + 0, + 0, + 0, + false, + 0, + complain_overflow_dont, + bfd_elf_generic_reloc, + "JMP_SLOT", + false, + 0, + 0, + true), + + HOWTO (R_ALPHA_RELATIVE, + 0, + 0, + 0, + false, + 0, + complain_overflow_dont, + bfd_elf_generic_reloc, + "RELATIVE", + false, + 0, + 0, + true) +}; + +/* A relocation function which doesn't do anything. */ + +static bfd_reloc_status_type +elf64_alpha_reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message) + bfd *abfd; + arelent *reloc; + asymbol *sym; + PTR data; + asection *sec; + bfd *output_bfd; + char **error_message; +{ + if (output_bfd) + reloc->address += sec->output_offset; + return bfd_reloc_ok; +} + +/* A relocation function used for an unsupported reloc. */ + +static bfd_reloc_status_type +elf64_alpha_reloc_bad (abfd, reloc, sym, data, sec, output_bfd, error_message) + bfd *abfd; + arelent *reloc; + asymbol *sym; + PTR data; + asection *sec; + bfd *output_bfd; + char **error_message; +{ + if (output_bfd) + reloc->address += sec->output_offset; + return bfd_reloc_notsupported; +} + +/* Do the work of the GPDISP relocation. */ + +static bfd_reloc_status_type +elf64_alpha_do_reloc_gpdisp (abfd, gpdisp, p_ldah, p_lda) + bfd *abfd; + bfd_vma gpdisp; + bfd_byte *p_ldah; + bfd_byte *p_lda; +{ + bfd_reloc_status_type ret = bfd_reloc_ok; + bfd_vma addend; + unsigned long i_ldah, i_lda; + + i_ldah = bfd_get_32 (abfd, p_ldah); + i_lda = bfd_get_32 (abfd, p_lda); + + /* Complain if the instructions are not correct. */ + if (((i_ldah >> 26) & 0x3f) != 0x09 + || ((i_lda >> 26) & 0x3f) != 0x08) + ret = bfd_reloc_dangerous; + + /* Extract the user-supplied offset, mirroring the sign extensions + that the instructions perform. */ + addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff); + addend = (addend ^ 0x80008000) - 0x80008000; + + gpdisp += addend; + + if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma)0x80000000 + || gpdisp >= 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, i_ldah, p_ldah); + bfd_put_32 (abfd, 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; + PTR data; + asection *input_section; + bfd *output_bfd; + char **err_msg; +{ + bfd_reloc_status_type ret; + bfd_vma gp, relocation; + 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; + } + + if (reloc_entry->address > input_section->_cooked_size || + reloc_entry->address + reloc_entry->addend > input_section->_cooked_size) + 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}, +}; + +/* Given a BFD reloc type, return a HOWTO structure. */ + +static reloc_howto_type * +elf64_alpha_bfd_reloc_type_lookup (abfd, code) + bfd *abfd; + 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 (i->bfd_reloc_val == code) + return &elf64_alpha_howto_table[i->elf_reloc_val]; + } + 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; + arelent *cache_ptr; + Elf64_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]; +} + +/* PLT/GOT Stuff */ +#define PLT_HEADER_SIZE 32 +#define PLT_HEADER_WORD1 0xc3600000 /* br $27,.+4 */ +#define PLT_HEADER_WORD2 0xa77b000c /* ldq $27,12($27) */ +#define PLT_HEADER_WORD3 0x47ff041f /* nop */ +#define PLT_HEADER_WORD4 0x6b7b0000 /* jmp $27,($27) */ + +#define PLT_ENTRY_SIZE 12 +#define PLT_ENTRY_WORD1 0x279f0000 /* ldah $28, 0($31) */ +#define PLT_ENTRY_WORD2 0x239c0000 /* lda $28, 0($28) */ +#define PLT_ENTRY_WORD3 0xc3e00000 /* br $31, plt0 */ + +#define MAX_GOT_ENTRIES (64*1024 / 8) + +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so" + +/* Handle an Alpha specific section when reading an object file. This + is called when elfcode.h finds a section with an unknown type. + FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure + how to. */ + +static boolean +elf64_alpha_section_from_shdr (abfd, hdr, name) + bfd *abfd; + Elf64_Internal_Shdr *hdr; + char *name; +{ + asection *newsect; + + /* 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) + { + case SHT_ALPHA_DEBUG: + if (strcmp (name, ".mdebug") != 0) + return false; + break; +#ifdef ERIC_neverdef + case SHT_ALPHA_REGINFO: + if (strcmp (name, ".reginfo") != 0 + || hdr->sh_size != sizeof (Elf64_External_RegInfo)) + return false; + break; +#endif + default: + return false; + } + + if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) + return false; + newsect = hdr->bfd_section; + + if (hdr->sh_type == SHT_ALPHA_DEBUG) + { + if (! bfd_set_section_flags (abfd, newsect, + (bfd_get_section_flags (abfd, newsect) + | SEC_DEBUGGING))) + return false; + } + +#ifdef ERIC_neverdef + /* For a .reginfo section, set the gp value in the tdata information + from the contents of this section. We need the gp value while + processing relocs, so we just get it now. */ + if (hdr->sh_type == SHT_ALPHA_REGINFO) + { + Elf64_External_RegInfo ext; + Elf64_RegInfo s; + + if (! bfd_get_section_contents (abfd, newsect, (PTR) &ext, + (file_ptr) 0, sizeof ext)) + return false; + bfd_alpha_elf64_swap_reginfo_in (abfd, &ext, &s); + elf_gp (abfd) = s.ri_gp_value; + } +#endif + + return true; +} + +/* Set the correct type for an Alpha ELF section. We do this by the + section name, which is a hack, but ought to work. */ + +static boolean +elf64_alpha_fake_sections (abfd, hdr, sec) + bfd *abfd; + Elf64_Internal_Shdr *hdr; + asection *sec; +{ + register const char *name; + + name = bfd_get_section_name (abfd, sec); + + 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; + } +#ifdef ERIC_neverdef + else if (strcmp (name, ".reginfo") == 0) + { + hdr->sh_type = SHT_ALPHA_REGINFO; + /* In a shared object on Irix 5.3, the .reginfo section has an + entsize of 0x18. FIXME: Does this matter? */ + if ((abfd->flags & DYNAMIC) != 0) + hdr->sh_entsize = sizeof (Elf64_External_RegInfo); + else + hdr->sh_entsize = 1; + + /* Force the section size to the correct value, even if the + linker thinks it is larger. The link routine below will only + write out this much data for .reginfo. */ + hdr->sh_size = sec->_raw_size = sizeof (Elf64_External_RegInfo); + } + else if (strcmp (name, ".hash") == 0 + || strcmp (name, ".dynamic") == 0 + || strcmp (name, ".dynstr") == 0) + { + hdr->sh_entsize = 0; + hdr->sh_info = SIZEOF_ALPHA_DYNSYM_SECNAMES; + } +#endif + else if (strcmp (name, ".sdata") == 0 + || strcmp (name, ".sbss") == 0 + || strcmp (name, ".lit4") == 0 + || strcmp (name, ".lit8") == 0) + hdr->sh_flags |= SHF_ALPHA_GPREL; + + return true; +} + +/* Return the number of additional phdrs we will need. */ + +static int +elf64_alpha_additional_program_headers (abfd) + bfd *abfd; +{ + asection *s; + int ret; + + ret = 0; + + s = bfd_get_section_by_name (abfd, ".reginfo"); + if (s != NULL && (s->flags & SEC_LOAD) != 0) + { + /* We need a PT_ALPHA_REGINFO segment. */ + ++ret; + } + + if (bfd_get_section_by_name (abfd, ".dynamic") != NULL + && bfd_get_section_by_name (abfd, ".mdebug") != NULL) + { + /* We need a PT_ALPHA_RTPROC segment. */ + ++ret; + } + + return ret; +} + +/* Create the .got section. */ + +static boolean +elf64_alpha_create_got_section(abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + asection *s; + + if (bfd_get_section_by_name (abfd, ".got")) + return true; + + s = bfd_make_section (abfd, ".got"); + if (s == NULL + || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_LINKER_CREATED)) + || !bfd_set_section_alignment (abfd, s, 3)) + return false; + + alpha_elf_tdata (abfd)->got = s; + + return true; +} + +/* Create all the dynamic sections. */ + +static boolean +elf64_alpha_create_dynamic_sections (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + asection *s; + struct elf_link_hash_entry *h; + + /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */ + + s = bfd_make_section (abfd, ".plt"); + if (s == NULL + || ! bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | SEC_CODE)) + || ! bfd_set_section_alignment (abfd, s, 3)) + return false; + + /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the + .plt section. */ + h = NULL; + if (! (_bfd_generic_link_add_one_symbol + (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, + (bfd_vma) 0, (const char *) NULL, false, + get_elf_backend_data (abfd)->collect, + (struct bfd_link_hash_entry **) &h))) + return false; + h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; + h->type = STT_OBJECT; + + if (info->shared + && ! _bfd_elf_link_record_dynamic_symbol (info, h)) + return false; + + s = bfd_make_section (abfd, ".rela.plt"); + if (s == NULL + || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | SEC_READONLY)) + || ! bfd_set_section_alignment (abfd, s, 3)) + return false; + + /* We may or may not have created a .got section for this object, but + we definitely havn't done the rest of the work. */ + + if (!elf64_alpha_create_got_section (abfd, info)) + return false; + + s = bfd_make_section(abfd, ".rela.got"); + if (s == NULL + || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | SEC_READONLY)) + || !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 = 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, + (struct bfd_link_hash_entry **) &h))) + return false; + h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; + h->type = STT_OBJECT; + + if (info->shared + && ! _bfd_elf_link_record_dynamic_symbol (info, h)) + return false; + + elf_hash_table (info)->hgot = h; + + return true; +} + +/* Read ECOFF debugging information from a .mdebug section into a + ecoff_debug_info structure. */ + +static boolean +elf64_alpha_read_ecoff_info (abfd, section, debug) + bfd *abfd; + asection *section; + struct ecoff_debug_info *debug; +{ + HDRR *symhdr; + const struct ecoff_debug_swap *swap; + char *ext_hdr = NULL; + + swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; + + ext_hdr = (char *) bfd_malloc ((size_t) 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) + == false) + goto error_return; + + symhdr = &debug->symbolic_header; + (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); + + /* 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 \ + { \ + debug->ptr = (type) bfd_malloc ((size_t) (size * symhdr->count)); \ + if (debug->ptr == NULL) \ + goto error_return; \ + if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ + || (bfd_read (debug->ptr, size, symhdr->count, \ + abfd) != size * symhdr->count)) \ + goto error_return; \ + } + + 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 + + debug->fdr = NULL; + debug->adjust = NULL; + + return true; + + 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 boolean +elf64_alpha_is_local_label_name (abfd, name) + bfd *abfd; + const char *name; +{ + return name[0] == '$'; +} + +/* 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. */ + +struct mips_elf_find_line +{ + struct ecoff_debug_info d; + struct ecoff_find_line i; +}; + +static 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; +{ + asection *msec; + + msec = bfd_get_section_by_name (abfd, ".mdebug"); + if (msec != 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; + + /* 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; + + 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; + + fi = ((struct mips_elf_find_line *) + bfd_zalloc (abfd, sizeof (struct mips_elf_find_line))); + if (fi == NULL) + { + msec->flags = origflags; + return false; + } + + if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d)) + { + msec->flags = origflags; + return false; + } + + /* Swap in the FDR information. */ + fi->d.fdr = ((struct fdr *) + bfd_alloc (abfd, + (fi->d.symbolic_header.ifdMax * + sizeof (struct fdr)))); + 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); + + elf_tdata (abfd)->find_line_info = fi; + + /* 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. */ + } + + if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, + &fi->i, filename_ptr, functionname_ptr, + line_ptr)) + { + msec->flags = origflags; + return true; + } + + msec->flags = origflags; + } + + /* Fall back on the generic ELF find_nearest_line routine. */ + + return _bfd_elf_find_nearest_line (abfd, section, symbols, offset, + filename_ptr, functionname_ptr, + line_ptr); +} + +/* 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; + boolean failed; +}; + +static boolean +elf64_alpha_output_extsym (h, data) + struct alpha_elf_link_hash_entry *h; + PTR data; +{ + struct extsym_info *einfo = (struct extsym_info *) data; + boolean strip; + asection *sec, *output_section; + + if (h->root.indx == -2) + strip = false; + else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 + || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) + && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 + && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) + 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; + + if (strip) + 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; + + /* 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 (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; + } + } + + h->esym.asym.reserved = 0; + h->esym.asym.index = indexNil; + } + + 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; + + 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.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) + { + /* 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; + 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; + } +#if 0 /* FIXME? */ + h->esym.ifd = 0; +#endif + } + + if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, + h->root.root.root.string, + &h->esym)) + { + einfo->failed = true; + return false; + } + + return true; +} + +/* FIXME: Create a runtime procedure table from the .mdebug section. + +static boolean +mips_elf_create_procedure_table (handle, abfd, info, s, debug) + PTR handle; + bfd *abfd; + struct bfd_link_info *info; + asection *s; + struct ecoff_debug_info *debug; +*/ + +/* Handle dynamic relocations when doing an Alpha ELF link. */ + +static boolean +elf64_alpha_check_relocs (abfd, info, sec, relocs) + bfd *abfd; + struct bfd_link_info *info; + asection *sec; + const Elf_Internal_Rela *relocs; +{ + bfd *dynobj; + asection *sreloc; + const char *rel_sec_name; + Elf_Internal_Shdr *symtab_hdr; + struct alpha_elf_link_hash_entry **sym_hashes; + struct alpha_elf_got_entry **local_got_entries; + const Elf_Internal_Rela *rel, *relend; + int got_created; + + if (info->relocateable) + return true; + + dynobj = elf_hash_table(info)->dynobj; + if (dynobj == NULL) + elf_hash_table(info)->dynobj = dynobj = abfd; + + sreloc = NULL; + rel_sec_name = NULL; + symtab_hdr = &elf_tdata(abfd)->symtab_hdr; + sym_hashes = alpha_elf_sym_hashes(abfd); + local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; + got_created = 0; + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; ++rel) + { + unsigned long r_symndx, r_type; + struct alpha_elf_link_hash_entry *h; + + 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]; + h->root.elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; + } + r_type = ELF64_R_TYPE (rel->r_info); + + switch (r_type) + { + case R_ALPHA_LITERAL: + { + struct alpha_elf_got_entry *gotent; + int flags = 0; + + if (h) + { + /* Search for and possibly create a got entry. */ + for (gotent = h->got_entries; gotent ; gotent = gotent->next) + if (gotent->gotobj == abfd && + gotent->addend == rel->r_addend) + break; + + if (!gotent) + { + gotent = ((struct alpha_elf_got_entry *) + bfd_alloc (abfd, + sizeof (struct alpha_elf_got_entry))); + if (!gotent) + return false; + + gotent->gotobj = abfd; + gotent->addend = rel->r_addend; + gotent->got_offset = -1; + gotent->flags = 0; + + gotent->next = h->got_entries; + h->got_entries = gotent; + + alpha_elf_tdata (abfd)->total_got_entries++; + } + } + else + { + /* This is a local .got entry -- record for merge. */ + if (!local_got_entries) + { + size_t size; + size = (symtab_hdr->sh_info + * sizeof (struct alpha_elf_got_entry *)); + + local_got_entries = ((struct alpha_elf_got_entry **) + bfd_alloc (abfd, size)); + if (!local_got_entries) + return false; + + memset (local_got_entries, 0, size); + alpha_elf_tdata (abfd)->local_got_entries = + local_got_entries; + } + + for (gotent = local_got_entries[ELF64_R_SYM(rel->r_info)]; + gotent != NULL && gotent->addend != rel->r_addend; + gotent = gotent->next) + continue; + if (!gotent) + { + gotent = ((struct alpha_elf_got_entry *) + bfd_alloc (abfd, + sizeof (struct alpha_elf_got_entry))); + if (!gotent) + return false; + + gotent->gotobj = abfd; + gotent->addend = rel->r_addend; + gotent->got_offset = -1; + gotent->flags = 0; + + gotent->next = local_got_entries[ELF64_R_SYM(rel->r_info)]; + local_got_entries[ELF64_R_SYM(rel->r_info)] = gotent; + + alpha_elf_tdata(abfd)->total_got_entries++; + alpha_elf_tdata(abfd)->n_local_got_entries++; + } + } + + /* 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. */ + if (rel+1 < relend + && ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE) + { + do + { + ++rel; + if (rel->r_addend >= 1 && rel->r_addend <= 3) + flags |= 1 << rel->r_addend; + } + while (rel+1 < relend && + ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE); + } + else + { + /* No LITUSEs -- presumably the address is not being + loaded for nothing. */ + flags = ALPHA_ELF_LINK_HASH_LU_ADDR; + } + + gotent->flags |= flags; + if (h) + { + /* Make a guess as to whether a .plt entry will be needed. */ + if ((h->flags |= flags) == ALPHA_ELF_LINK_HASH_LU_FUNC) + h->root.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + else + h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + } + } + /* FALLTHRU */ + + case R_ALPHA_GPDISP: + case R_ALPHA_GPREL32: + /* We don't actually use the .got here, but the sections must + be created before the linker maps input sections to output + sections. */ + if (!got_created) + { + 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; + + got_created = 1; + } + break; + + case R_ALPHA_SREL16: + case R_ALPHA_SREL32: + case R_ALPHA_SREL64: + if (h == NULL) + break; + /* FALLTHRU */ + + case R_ALPHA_REFLONG: + case R_ALPHA_REFQUAD: + 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; + + BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0 + && strcmp (bfd_get_section_name (abfd, sec), + rel_sec_name+5) == 0); + } + + /* 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) + { + sreloc = bfd_make_section (dynobj, rel_sec_name); + if (sreloc == NULL + || !bfd_set_section_flags (dynobj, sreloc, + (SEC_ALLOC|SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | SEC_READONLY)) + || !bfd_set_section_alignment (dynobj, sreloc, 3)) + return false; + } + } + + 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. */ + + struct alpha_elf_reloc_entry *rent; + + for (rent = h->reloc_entries; rent; rent = rent->next) + if (rent->rtype == r_type && rent->srel == sreloc) + break; + + if (!rent) + { + rent = ((struct alpha_elf_reloc_entry *) + bfd_alloc (abfd, + sizeof (struct alpha_elf_reloc_entry))); + if (!rent) + return false; + + rent->srel = sreloc; + rent->rtype = r_type; + rent->count = 1; + + rent->next = h->reloc_entries; + h->reloc_entries = rent; + } + else + rent->count++; + } + else if (info->shared) + { + /* If this is a shared library, we need a RELATIVE reloc. */ + sreloc->_raw_size += sizeof (Elf64_External_Rela); + } + break; + } + } + + 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 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; + + 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. */ + + if (h->root.type != bfd_link_hash_undefweak + && 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)) + /* 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) + { + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + + s = bfd_get_section_by_name(dynobj, ".plt"); + if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info)) + return false; + + /* The first bit of the .plt is reserved. */ + if (s->_raw_size == 0) + s->_raw_size = PLT_HEADER_SIZE; + + h->plt_offset = s->_raw_size; + s->_raw_size += PLT_ENTRY_SIZE; + + /* 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.u.def.section = s; + h->root.u.def.value = h->plt_offset; + } + + /* 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->_raw_size += sizeof (Elf64_External_Rela); + + return true; + } + else + h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + + /* If this is a weak symbol, and there is a real definition, the + processor independent code will have arranged for us to see the + real definition first, and we can just use the same value. */ + if (h->weakdef != NULL) + { + BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined + || h->weakdef->root.type == bfd_link_hash_defweak); + h->root.u.def.section = h->weakdef->root.u.def.section; + h->root.u.def.value = h->weakdef->root.u.def.value; + return true; + } + + /* This is a reference to a symbol defined by a dynamic object which + is not a function. 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; +} + +/* Is it possible to merge two object file's .got tables? */ + +static boolean +elf64_alpha_can_merge_gots (a, b) + bfd *a, *b; +{ + int total = alpha_elf_tdata (a)->total_got_entries; + + /* Trivial quick fallout test. */ + if (total + alpha_elf_tdata (b)->total_got_entries <= MAX_GOT_ENTRIES) + return true; + + /* By their nature, local .got entries cannot be merged. */ + if ((total += alpha_elf_tdata (b)->n_local_got_entries) > MAX_GOT_ENTRIES) + return false; + + /* 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. */ + { + struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes(b); + Elf_Internal_Shdr *symtab_hdr = &elf_tdata(b)->symtab_hdr; + int i, n; + + n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info; + for (i = 0; i < n; ++i) + { + struct alpha_elf_got_entry *ae, *be; + for (be = hashes[i]->got_entries; be ; be = be->next) + { + if (be->gotobj != b) + continue; + + for (ae = hashes[i]->got_entries; ae ; ae = ae->next) + if (ae->gotobj == a && ae->addend == be->addend) + goto global_found; + + if (++total > MAX_GOT_ENTRIES) + return false; + global_found:; + } + } + } + + return true; +} + +/* Actually merge two .got tables. */ + +static void +elf64_alpha_merge_gots (a, b) + bfd *a, *b; +{ + int total = alpha_elf_tdata(a)->total_got_entries; + + /* Remember local expansion. */ + { + int e = alpha_elf_tdata(b)->n_local_got_entries; + total += e; + alpha_elf_tdata(a)->n_local_got_entries += e; + } + + /* Let the local .got entries know they are part of a new subsegment. */ + { + struct alpha_elf_got_entry **local_got_entries; + local_got_entries = alpha_elf_tdata(b)->local_got_entries; + if (local_got_entries) + { + int i, n; + + n = elf_tdata(b)->symtab_hdr.sh_info; + for (i = 0; i < n; ++i) + { + struct alpha_elf_got_entry *gotent; + for (gotent = local_got_entries[i]; gotent; gotent = gotent->next) + gotent->gotobj = a; + } + } + } + + /* Merge the global .got entries. */ + { + struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes(b); + Elf_Internal_Shdr *symtab_hdr = &elf_tdata(b)->symtab_hdr; + int i, n; + + n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info; + for (i = 0; i < n; ++i) + { + struct alpha_elf_got_entry *ae, *be, **pbe, **start; + start = &hashes[i]->got_entries; + for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next) + { + if (be->gotobj != b) + continue; + + for (ae = *start; ae ; ae = ae->next) + if (ae->gotobj == a && ae->addend == be->addend) + { + ae->flags |= be->flags; + *pbe = be->next; + goto global_found; + } + be->gotobj = a; + total += 1; + + global_found:; + } + } + } + + alpha_elf_tdata(a)->total_got_entries = total; + alpha_elf_tdata(b)->gotobj = a; +} + +/* Calculate the offsets for the got entries. */ + +static boolean +elf64_alpha_calc_got_offsets_for_symbol (h, arg) + struct alpha_elf_link_hash_entry *h; + PTR arg; +{ + struct alpha_elf_got_entry *gotent; + + for (gotent = h->got_entries; gotent; gotent = gotent->next) + { + bfd_size_type *plge = &alpha_elf_tdata (gotent->gotobj)->got->_raw_size; + gotent->got_offset = *plge; + *plge += 8; + } + + return true; +} + +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->_raw_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->_raw_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; + + 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) + { + gotent->got_offset = got_offset; + got_offset += 8; + } + } + + alpha_elf_tdata(i)->got->_raw_size = got_offset; + } +} + +/* Remove a section from the output BFD. */ + +static void +elf64_alpha_strip_section_from_output (s) + asection *s; +{ + asection **spp; + + for (spp = &s->output_section->owner->sections; + *spp != s->output_section; + spp = &(*spp)->next) + continue; + *spp = s->output_section->next; + --s->output_section->owner->section_count; +} + +/* Constructs the gots. */ + +static boolean +elf64_alpha_always_size_sections (output_bfd, info) + bfd *output_bfd; + struct bfd_link_info *info; +{ + bfd *i, *got_list, *cur_got_obj, **cur_got_tail; + int ngots; + + if (info->relocateable) + return true; + + ngots = 0; + got_list = NULL; + cur_got_obj = NULL; + cur_got_tail = NULL; + for (i = info->input_bfds; i ; i = i->link_next) + { + bfd *this_got = alpha_elf_tdata (i)->gotobj; + + /* Don't play if there is no .got for this input file. */ + if (this_got == NULL) + continue; + + if (alpha_elf_tdata (this_got)->total_got_entries > MAX_GOT_ENTRIES) + { + /* Yikes! A single object file has too many entries. */ + (*_bfd_error_handler) + ("%s: .got subsegment exceeds 64K (size %d)", + bfd_get_filename(i), + alpha_elf_tdata(this_got)->total_got_entries * 8); + return false; + } + + if (cur_got_obj) + { + if (elf64_alpha_can_merge_gots (cur_got_obj, i)) + { + elf64_alpha_merge_gots (cur_got_obj, i); + *cur_got_tail = i; + } + else + { + if (++ngots == 2) + { + (*info->callbacks->warning) + (info, "using multiple gp values", (char *) NULL, + output_bfd, (asection *) NULL, (bfd_vma) 0); + } + *cur_got_tail = NULL; + alpha_elf_tdata(cur_got_obj)->got_link_next = got_list; + got_list = cur_got_obj; + cur_got_obj = i; + } + } + else + { + ++ngots; + cur_got_obj = i; + } + cur_got_tail = &alpha_elf_tdata(i)->in_got_link_next; + } + + if (cur_got_obj) + alpha_elf_tdata (cur_got_obj)->got_link_next = got_list; + alpha_elf_hash_table (info)->got_list = got_list = cur_got_obj; + + /* Once the gots have been merged, fill in the got offsets for everything + therein. */ + elf64_alpha_calc_got_offsets (info); + + /* Allocate space for all of the .got subsections. */ + for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) + { + asection *s = alpha_elf_tdata(i)->got; + if (s->_raw_size > 0) + { + s->contents = (bfd_byte *) bfd_zalloc (i, s->_raw_size); + if (s->contents == NULL) + return false; + } + } + + return true; +} + +/* Work out the sizes of the dynamic relocation entries. */ + +static boolean +elf64_alpha_calc_dynrel_sizes (h, info) + struct alpha_elf_link_hash_entry *h; + struct bfd_link_info *info; +{ + /* 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.elf_link_hash_flags + & (ELF_LINK_HASH_DEF_REGULAR + | ELF_LINK_HASH_REF_REGULAR + | ELF_LINK_HASH_DEF_DYNAMIC)) + == ELF_LINK_HASH_REF_REGULAR) + && (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.elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; + } + + /* If the symbol is dynamic, we'll need all the relocations in their + natural form. */ + if (alpha_elf_dynamic_symbol_p (&h->root, info)) + { + struct alpha_elf_reloc_entry *relent; + + for (relent = h->reloc_entries; relent; relent = relent->next) + { + relent->srel->_raw_size += + sizeof (Elf64_External_Rela) * relent->count; + } + + /* Only add a .rela.got entry if we're not using a .plt entry. */ + if (h->root.plt_offset == MINUS_ONE) + { + bfd *dynobj = elf_hash_table(info)->dynobj; + struct alpha_elf_got_entry *gotent; + bfd_size_type count = 0; + asection *srel; + + for (gotent = h->got_entries; gotent ; gotent = gotent->next) + count++; + if (count > 0) + { + srel = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (srel != NULL); + srel->_raw_size += sizeof (Elf64_External_Rela) * count; + } + } + } + /* Otherwise, shared objects require RELATIVE relocs for all REFQUAD + and REFLONG relocations. */ + else if (info->shared) + { + struct alpha_elf_reloc_entry *relent; + + for (relent = h->reloc_entries; relent; relent = relent->next) + if (relent->rtype == R_ALPHA_REFLONG + || relent->rtype == R_ALPHA_REFQUAD) + { + relent->srel->_raw_size += + sizeof(Elf64_External_Rela) * relent->count; + } + } + + return true; +} + +/* Set the sizes of the dynamic sections. */ + +static boolean +elf64_alpha_size_dynamic_sections (output_bfd, info) + bfd *output_bfd; + struct bfd_link_info *info; +{ + bfd *dynobj; + asection *s; + boolean reltext; + boolean relplt; + + dynobj = elf_hash_table(info)->dynobj; + BFD_ASSERT(dynobj != NULL); + + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Set the contents of the .interp section to the interpreter. */ + if (!info->shared) + { + s = bfd_get_section_by_name (dynobj, ".interp"); + BFD_ASSERT (s != NULL); + s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; + s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; + } + + /* 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); + + /* When building shared libraries, each local .got entry needs a + RELATIVE reloc. */ + if (info->shared) + { + bfd *i; + asection *srel; + bfd_size_type count; + + srel = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (srel != NULL); + + for (i = alpha_elf_hash_table(info)->got_list, count = 0; + i != NULL; + i = alpha_elf_tdata(i)->got_link_next) + count += alpha_elf_tdata(i)->n_local_got_entries; + + srel->_raw_size += count * sizeof(Elf64_External_Rela); + } + } + /* else we're not dynamic and by definition we don't need such things. */ + + /* The check_relocs and adjust_dynamic_symbol entry points have + determined the sizes of the various dynamic sections. Allocate + memory for them. */ + reltext = false; + relplt = false; + for (s = dynobj->sections; s != NULL; s = s->next) + { + const char *name; + boolean strip; + + if (!(s->flags & SEC_LINKER_CREATED)) + 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 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. */ + + strip = false; + + if (strncmp (name, ".rela", 5) == 0) + { + strip = (s->_raw_size == 0); + + if (!strip) + { + const char *outname; + asection *target; + + /* If this relocation section applies to a read only + section, then we probably need a DT_TEXTREL entry. */ + outname = bfd_get_section_name (output_bfd, + s->output_section); + target = bfd_get_section_by_name (output_bfd, outname + 5); + if (target != NULL + && (target->flags & SEC_READONLY) != 0) + reltext = true; + + 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; + } + } + else if (strcmp (name, ".plt") != 0) + { + /* It's not one of our dynamic sections, so don't allocate space. */ + continue; + } + + if (strip) + elf64_alpha_strip_section_from_output (s); + else + { + /* Allocate memory for the section contents. */ + s->contents = (bfd_byte *) bfd_zalloc(dynobj, s->_raw_size); + if (s->contents == NULL && s->_raw_size != 0) + return false; + } + } + + /* If we are generating a shared library, we generate a section + symbol for each output section. These are local symbols, which + means that they must come first in the dynamic symbol table. + That means we must increment the dynamic symbol index of every + other dynamic symbol. */ + if (info->shared) + { + long c[2], i; + asection *p; + + c[0] = 0; + c[1] = bfd_count_sections (output_bfd); + + elf_hash_table (info)->dynsymcount += c[1]; + elf_link_hash_traverse (elf_hash_table(info), + elf64_alpha_adjust_dynindx, + (PTR) c); + + for (i = 1, p = output_bfd->sections; + p != NULL; + p = p->next, i++) + { + elf_section_data (p)->dynindx = i; + /* These symbols will have no names, so we don't need to + fiddle with dynstr_index. */ + } + } + + 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. */ + if (!info->shared) + { + if (!bfd_elf64_add_dynamic_entry (info, DT_DEBUG, 0)) + return false; + } + + if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0)) + return false; + + if (relplt) + { + if (! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0) + || ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA) + || ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0)) + return false; + } + + if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0) + || ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0) + || ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT, + sizeof(Elf64_External_Rela))) + return false; + + if (reltext) + { + if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0)) + return false; + } + } + + return true; +} + +/* Increment the index of a dynamic symbol by a given amount. Called + via elf_link_hash_traverse. */ + +static boolean +elf64_alpha_adjust_dynindx (h, cparg) + struct elf_link_hash_entry *h; + PTR cparg; +{ + long *cp = (long *)cparg; + + if (h->dynindx >= cp[0]) + h->dynindx += cp[1]; + + return true; +} + +/* Relocate an Alpha ELF section. */ + +static 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; +{ + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Rela *rel; + Elf_Internal_Rela *relend; + asection *sec, *sgot, *srel, *srelgot; + bfd *dynobj, *gotobj; + bfd_vma gp; + + srelgot = srel = NULL; + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + dynobj = elf_hash_table (info)->dynobj; + if (dynobj) + { + srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + } + + /* Find the gp value for this input bfd. */ + sgot = NULL; + gp = 0; + gotobj = alpha_elf_tdata (input_bfd)->gotobj; + if (gotobj) + { + sgot = alpha_elf_tdata (gotobj)->got; + gp = _bfd_get_gp_value (gotobj); + if (gp == 0) + { + gp = (sgot->output_section->vma + + sgot->output_offset + + 0x8000); + _bfd_set_gp_value (gotobj, gp); + } + } + + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++) + { + int r_type; + reloc_howto_type *howto; + unsigned long r_symndx; + struct alpha_elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + bfd_vma relocation; + bfd_vma addend; + bfd_reloc_status_type r; + + r_type = ELF64_R_TYPE(rel->r_info); + if (r_type < 0 || r_type >= (int) R_ALPHA_max) + { + bfd_set_error (bfd_error_bad_value); + return false; + } + howto = elf64_alpha_howto_table + r_type; + + r_symndx = ELF64_R_SYM(rel->r_info); + + if (info->relocateable) + { + /* This is a relocateable link. We don't have to change + anything, unless the reloc is against a section symbol, + in which case we have to adjust according to where the + section symbol winds up in the output section. */ + if (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; + } + } + + continue; + } + + /* This is a final link. */ + + h = NULL; + sym = NULL; + sec = NULL; + + if (r_symndx < symtab_hdr->sh_info) + { + sym = local_syms + r_symndx; + sec = local_sections[r_symndx]; + relocation = (sec->output_section->vma + + sec->output_offset + + sym->st_value); + } + else + { + h = alpha_elf_sym_hashes (input_bfd)[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 (h->root.root.type == bfd_link_hash_defined + || h->root.root.type == bfd_link_hash_defweak) + { + sec = h->root.root.u.def.section; + +#if rth_notdef + if ((r_type == R_ALPHA_LITERAL + && elf_hash_table(info)->dynamic_sections_created + && (!info->shared + || !info->symbolic + || !(h->root.elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR))) + || (info->shared + && (!info->symbolic + || !(h->root.elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR)) + && (input_section->flags & SEC_ALLOC) + && (r_type == R_ALPHA_REFLONG + || r_type == R_ALPHA_REFQUAD + || r_type == R_ALPHA_LITERAL))) + { + /* In these cases, we don't need the relocation value. + We check specially because in some obscure cases + sec->output_section will be NULL. */ + relocation = 0; + } +#else + /* FIXME: Are not these obscure cases simply bugs? Let's + get something working and come back to this. */ + if (sec->output_section == NULL) + relocation = 0; +#endif /* rth_notdef */ + else + { + relocation = (h->root.root.u.def.value + + sec->output_section->vma + + sec->output_offset); + } + } + else if (h->root.root.type == bfd_link_hash_undefweak) + relocation = 0; + else if (info->shared && !info->symbolic) + relocation = 0; + else + { + if (!((*info->callbacks->undefined_symbol) + (info, h->root.root.root.string, input_bfd, + input_section, rel->r_offset))) + return false; + relocation = 0; + } + } + addend = rel->r_addend; + + switch (r_type) + { + case R_ALPHA_GPDISP: + { + bfd_byte *p_ldah, *p_lda; + + BFD_ASSERT(gp != 0); + + relocation = (input_section->output_section->vma + + input_section->output_offset + + rel->r_offset); + + p_ldah = contents + rel->r_offset - input_section->vma; + p_lda = p_ldah + rel->r_addend; + + r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - relocation, + p_ldah, p_lda); + } + break; + + case R_ALPHA_OP_PUSH: + case R_ALPHA_OP_STORE: + case R_ALPHA_OP_PSUB: + case R_ALPHA_OP_PRSHIFT: + /* We hate these silly beasts. */ + abort(); + + case R_ALPHA_LITERAL: + { + struct alpha_elf_got_entry *gotent; + + BFD_ASSERT(sgot != NULL); + BFD_ASSERT(gp != 0); + + if (h != NULL) + { + gotent = h->got_entries; + while (gotent->gotobj != gotobj || gotent->addend != addend) + gotent = gotent->next; + + /* Initialize the .got entry's value. */ + if (!(gotent->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_DONE)) + { + bfd_put_64 (output_bfd, relocation+addend, + sgot->contents + gotent->got_offset); + + /* The dynamic relocations for the .got entries are + done in finish_dynamic_symbol. */ + + gotent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_DONE; + } + } + else + { + gotent = (alpha_elf_tdata(input_bfd)-> + local_got_entries[r_symndx]); + while (gotent->addend != addend) + gotent = gotent->next; + + if (!(gotent->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_DONE)) + { + bfd_put_64 (output_bfd, relocation+addend, + sgot->contents + gotent->got_offset); + + /* Local got entries need RELATIVE relocs in shared + libraries. */ + if (info->shared) + { + Elf_Internal_Rela outrel; + + BFD_ASSERT(srelgot != NULL); + + outrel.r_offset = (sgot->output_section->vma + + sgot->output_offset + + gotent->got_offset); + outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE); + outrel.r_addend = 0; + + bfd_elf64_swap_reloca_out (output_bfd, &outrel, + ((Elf64_External_Rela *) + srelgot->contents) + + srelgot->reloc_count++); + } + + gotent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_DONE; + } + } + + /* Figure the gprel relocation. */ + addend = 0; + relocation = (sgot->output_section->vma + + sgot->output_offset + + gotent->got_offset); + relocation -= gp; + } + /* overflow handled by _bfd_final_link_relocate */ + goto default_reloc; + + case R_ALPHA_GPREL32: + BFD_ASSERT(gp != 0); + relocation -= gp; + goto default_reloc; + + case R_ALPHA_BRADDR: + case R_ALPHA_HINT: + /* The regular PC-relative stuff measures from the start of + the instruction rather than the end. */ + addend -= 4; + goto default_reloc; + + case R_ALPHA_REFLONG: + case R_ALPHA_REFQUAD: + { + Elf_Internal_Rela outrel; + boolean skip; + + /* Careful here to remember RELATIVE relocations for global + variables for symbolic shared objects. */ + + if (h && alpha_elf_dynamic_symbol_p (&h->root, info)) + { + BFD_ASSERT(h->root.dynindx != -1); + outrel.r_info = ELF64_R_INFO(h->root.dynindx, r_type); + outrel.r_addend = addend; + addend = 0, relocation = 0; + } + else if (info->shared) + { + outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE); + outrel.r_addend = 0; + } + else + goto default_reloc; + + if (!srel) + { + const char *name; + + name = (bfd_elf_string_from_elf_section + (input_bfd, elf_elfheader(input_bfd)->e_shstrndx, + elf_section_data(input_section)->rel_hdr.sh_name)); + BFD_ASSERT(name != NULL); + + srel = bfd_get_section_by_name (dynobj, name); + BFD_ASSERT(srel != NULL); + } + + skip = false; + + if (elf_section_data (input_section)->stab_info == NULL) + outrel.r_offset = rel->r_offset; + else + { + bfd_vma off; + + off = (_bfd_stab_section_offset + (output_bfd, &elf_hash_table (info)->stab_info, + input_section, + &elf_section_data (input_section)->stab_info, + rel->r_offset)); + if (off == (bfd_vma) -1) + skip = true; + outrel.r_offset = off; + } + + if (! skip) + outrel.r_offset += (input_section->output_section->vma + + input_section->output_offset); + else + memset (&outrel, 0, sizeof outrel); + + bfd_elf64_swap_reloca_out (output_bfd, &outrel, + ((Elf64_External_Rela *) + srel->contents) + + srel->reloc_count++); + } + goto default_reloc; + + default: + default_reloc: + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, relocation, + addend); + break; + } + + switch (r) + { + case bfd_reloc_ok: + break; + + case bfd_reloc_overflow: + { + const char *name; + + if (h != NULL) + name = h->root.root.root.string; + else + { + name = (bfd_elf_string_from_elf_section + (input_bfd, symtab_hdr->sh_link, sym->st_name)); + if (name == NULL) + return false; + if (*name == '\0') + name = bfd_section_name (input_bfd, sec); + } + if (! ((*info->callbacks->reloc_overflow) + (info, name, howto->name, (bfd_vma) 0, + input_bfd, input_section, rel->r_offset))) + return false; + } + break; + + default: + case bfd_reloc_outofrange: + abort (); + } + } + + return true; +} + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ + +static 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; +{ + bfd *dynobj = elf_hash_table(info)->dynobj; + + if (h->plt_offset != MINUS_ONE) + { + /* Fill in the .plt entry for this symbol. */ + asection *splt, *sgot, *srel; + Elf_Internal_Rela outrel; + bfd_vma got_addr, plt_addr; + bfd_vma plt_index; + struct alpha_elf_got_entry *gotent; + + 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"); + BFD_ASSERT (splt != NULL); + srel = bfd_get_section_by_name (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. */ + { + unsigned insn1, insn2, insn3; + long hi, lo; + + /* decompose the reloc offset for the plt for ldah+lda */ + hi = plt_index * sizeof(Elf64_External_Rela); + lo = ((hi & 0xffff) ^ 0x8000) - 0x8000; + hi = (hi - lo) >> 16; + + insn1 = PLT_ENTRY_WORD1 | (hi & 0xffff); + insn2 = PLT_ENTRY_WORD2 | (lo & 0xffff); + insn3 = PLT_ENTRY_WORD3 | ((-(h->plt_offset + 12) >> 2) & 0x1fffff); + + 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); + } + + /* 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; + + bfd_elf64_swap_reloca_out (output_bfd, &outrel, + ((Elf64_External_Rela *)srel->contents + + plt_index)); + + if (!(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) + { + /* Mark the symbol as undefined, rather than as defined in the + .plt section. Leave the value alone. */ + sym->st_shndx = SHN_UNDEF; + } + + /* Fill in the entries in the .got. */ + bfd_put_64 (output_bfd, plt_addr, sgot->contents + gotent->got_offset); + + /* Subsequent .got entries will continue to bounce through the .plt. */ + while ((gotent = gotent->next) != NULL) + { + sgot = alpha_elf_tdata(gotent->gotobj)->got; + BFD_ASSERT(sgot != NULL); + BFD_ASSERT(gotent->addend == 0); + + bfd_put_64 (output_bfd, plt_addr, + sgot->contents + gotent->got_offset); + } + } + else if (alpha_elf_dynamic_symbol_p (h, info)) + { + /* Fill in the dynamic relocations for this symbol's .got entries. */ + asection *srel; + Elf_Internal_Rela outrel; + struct alpha_elf_got_entry *gotent; + + srel = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (srel != NULL); + + outrel.r_info = ELF64_R_INFO (h->dynindx, R_ALPHA_GLOB_DAT); + for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries; + gotent != NULL; + gotent = gotent->next) + { + asection *sgot = alpha_elf_tdata (gotent->gotobj)->got; + outrel.r_offset = (sgot->output_section->vma + + sgot->output_offset + + gotent->got_offset); + outrel.r_addend = gotent->addend; + + bfd_elf64_swap_reloca_out (output_bfd, &outrel, + ((Elf64_External_Rela *)srel->contents + + srel->reloc_count++)); + } + } + + /* Mark some specially defined symbols as absolute. */ + if (strcmp (h->root.root.string, "_DYNAMIC") == 0 + || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 + || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) + sym->st_shndx = SHN_ABS; + + return true; +} + +/* Finish up the dynamic sections. */ + +static boolean +elf64_alpha_finish_dynamic_sections (output_bfd, info) + 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"); + + if (elf_hash_table (info)->dynamic_sections_created) + { + asection *splt; + Elf64_External_Dyn *dyncon, *dynconend; + + splt = bfd_get_section_by_name (dynobj, ".plt"); + BFD_ASSERT (splt != NULL && sdyn != NULL); + + dyncon = (Elf64_External_Dyn *) sdyn->contents; + dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_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; + case DT_PLTRELSZ: + name = ".rela.plt"; + goto get_size; + case DT_JMPREL: + name = ".rela.plt"; + goto get_vma; + + case DT_RELASZ: + /* My interpretation of the TIS v1.1 ELF document indicates + that RELASZ should not include JMPREL. This is not what + 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->_cooked_size ? s->_cooked_size : s->_raw_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->_cooked_size ? s->_cooked_size : s->_raw_size); + break; + } + + bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); + } + + /* Initialize the PLT0 entry */ + if (splt->_raw_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); + + /* 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 = + PLT_HEADER_SIZE; + } + } + + if (info->shared) + { + asection *sdynsym; + asection *s; + Elf_Internal_Sym sym; + + /* Set up the section symbols for the output sections. */ + + sdynsym = bfd_get_section_by_name (dynobj, ".dynsym"); + BFD_ASSERT (sdynsym != NULL); + + sym.st_size = 0; + sym.st_name = 0; + sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); + sym.st_other = 0; + + for (s = output_bfd->sections; s != NULL; s = s->next) + { + int indx; + + sym.st_value = s->vma; + + indx = elf_section_data (s)->this_idx; + BFD_ASSERT (indx > 0); + sym.st_shndx = indx; + + bfd_elf64_swap_symbol_out (output_bfd, &sym, + (PTR) (((Elf64_External_Sym *) + sdynsym->contents) + + elf_section_data (s)->dynindx)); + } + + /* Set the sh_info field of the output .dynsym section to the + index of the first global symbol. */ + elf_section_data (sdynsym->output_section)->this_hdr.sh_info = + bfd_count_sections (output_bfd) + 1; + } + + return true; +} + +/* We need to use a special link routine to handle the .reginfo and + the .mdebug sections. We need to merge all instances of these + sections together, not write them all out sequentially. */ + +static boolean +elf64_alpha_final_link (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + asection *o; + struct bfd_link_order *p; + asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec; + struct ecoff_debug_info debug; + 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; + + /* Go through the sections and collect the .reginfo and .mdebug + information. */ + reginfo_sec = NULL; + mdebug_sec = NULL; + gptab_data_sec = NULL; + gptab_bss_sec = NULL; + for (o = abfd->sections; o != (asection *) NULL; o = o->next) + { +#ifdef ERIC_neverdef + if (strcmp (o->name, ".reginfo") == 0) + { + memset (®info, 0, sizeof reginfo); + + /* We have found the .reginfo section in the output file. + Look through all the link_orders comprising it and merge + the information together. */ + for (p = o->link_order_head; + p != (struct bfd_link_order *) NULL; + p = p->next) + { + asection *input_section; + bfd *input_bfd; + Elf64_External_RegInfo ext; + Elf64_RegInfo sub; + + if (p->type != bfd_indirect_link_order) + { + if (p->type == bfd_fill_link_order) + continue; + abort (); + } + + input_section = p->u.indirect.section; + input_bfd = input_section->owner; + + /* The linker emulation code has probably clobbered the + size to be zero bytes. */ + if (input_section->_raw_size == 0) + input_section->_raw_size = sizeof (Elf64_External_RegInfo); + + if (! bfd_get_section_contents (input_bfd, input_section, + (PTR) &ext, + (file_ptr) 0, + sizeof ext)) + return false; + + bfd_alpha_elf64_swap_reginfo_in (input_bfd, &ext, &sub); + + reginfo.ri_gprmask |= sub.ri_gprmask; + reginfo.ri_cprmask[0] |= sub.ri_cprmask[0]; + reginfo.ri_cprmask[1] |= sub.ri_cprmask[1]; + reginfo.ri_cprmask[2] |= sub.ri_cprmask[2]; + reginfo.ri_cprmask[3] |= sub.ri_cprmask[3]; + + /* ri_gp_value is set by the function + alpha_elf_section_processing when the section is + finally written out. */ + + /* Hack: reset the SEC_HAS_CONTENTS flag so that + elf_link_input_bfd ignores this section. */ + input_section->flags &=~ SEC_HAS_CONTENTS; + } + + /* Force the section size to the value we want. */ + o->_raw_size = sizeof (Elf64_External_RegInfo); + + /* Skip this section later on (I don't think this currently + matters, but someday it might). */ + o->link_order_head = (struct bfd_link_order *) NULL; + + reginfo_sec = o; + } +#endif + + if (strcmp (o->name, ".mdebug") == 0) + { + struct extsym_info einfo; + + /* We have found the .mdebug section in the output file. + Look through all the link_orders comprising it and merge + the information together. */ + symhdr->magic = swap->sym_magic; + /* FIXME: What should the version stamp be? */ + symhdr->vstamp = 0; + symhdr->ilineMax = 0; + symhdr->cbLine = 0; + symhdr->idnMax = 0; + symhdr->ipdMax = 0; + symhdr->isymMax = 0; + symhdr->ioptMax = 0; + symhdr->iauxMax = 0; + symhdr->issMax = 0; + symhdr->issExtMax = 0; + symhdr->ifdMax = 0; + symhdr->crfd = 0; + symhdr->iextMax = 0; + + /* We accumulate the debugging information itself in the + debug_info structure. */ + debug.line = NULL; + debug.external_dnr = NULL; + debug.external_pdr = NULL; + debug.external_sym = NULL; + debug.external_opt = NULL; + debug.external_aux = NULL; + debug.ss = NULL; + debug.ssext = debug.ssext_end = NULL; + debug.external_fdr = NULL; + debug.external_rfd = NULL; + debug.external_ext = debug.external_ext_end = NULL; + + mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); + if (mdebug_handle == (PTR) NULL) + return false; + + if (1) + { + asection *s; + EXTR esym; + bfd_vma last; + unsigned int i; + static const char * const name[] = + { + ".text", ".init", ".fini", ".data", + ".rodata", ".sdata", ".sbss", ".bss" + }; + static const int sc[] = { scText, scInit, scFini, scData, + scRData, scSData, scSBss, scBss }; + + esym.jmptbl = 0; + esym.cobol_main = 0; + esym.weakext = 0; + esym.reserved = 0; + esym.ifd = ifdNil; + esym.asym.iss = issNil; + esym.asym.st = stLocal; + esym.asym.reserved = 0; + esym.asym.index = indexNil; + for (i = 0; i < 8; i++) + { + esym.asym.sc = sc[i]; + s = bfd_get_section_by_name (abfd, name[i]); + if (s != NULL) + { + esym.asym.value = s->vma; + last = s->vma + s->_raw_size; + } + else + esym.asym.value = last; + + if (! bfd_ecoff_debug_one_external (abfd, &debug, swap, + name[i], &esym)) + return false; + } + } + + for (p = o->link_order_head; + p != (struct bfd_link_order *) NULL; + p = p->next) + { + asection *input_section; + bfd *input_bfd; + const struct ecoff_debug_swap *input_swap; + struct ecoff_debug_info input_debug; + char *eraw_src; + char *eraw_end; + + if (p->type != bfd_indirect_link_order) + { + if (p->type == bfd_fill_link_order) + continue; + abort (); + } + + 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; + } + + input_swap = (get_elf_backend_data (input_bfd) + ->elf_backend_ecoff_debug_swap); + + BFD_ASSERT (p->size == input_section->_raw_size); + + /* The ECOFF linking code expects that we have already + read in the debugging information and set up an + ecoff_debug_info structure, so we do that now. */ + if (!elf64_alpha_read_ecoff_info (input_bfd, input_section, + &input_debug)) + return false; + + if (! (bfd_ecoff_debug_accumulate + (mdebug_handle, abfd, &debug, swap, input_bfd, + &input_debug, input_swap, info))) + return false; + + /* Loop through the external symbols. For each one with + 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_end = (eraw_src + + (input_debug.symbolic_header.iextMax + * input_swap->external_ext_size)); + for (; + eraw_src < eraw_end; + eraw_src += input_swap->external_ext_size) + { + EXTR ext; + const char *name; + struct alpha_elf_link_hash_entry *h; + + (*input_swap->swap_ext_in) (input_bfd, (PTR) 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); + if (h == NULL || h->esym.ifd != -2) + continue; + + if (ext.ifd != -1) + { + BFD_ASSERT (ext.ifd + < input_debug.symbolic_header.ifdMax); + ext.ifd = input_debug.ifdmap[ext.ifd]; + } + + h->esym = ext; + } + + /* Free up the information we just read. */ + free (input_debug.line); + free (input_debug.external_dnr); + free (input_debug.external_pdr); + free (input_debug.external_sym); + free (input_debug.external_opt); + free (input_debug.external_aux); + free (input_debug.ss); + free (input_debug.ssext); + free (input_debug.external_fdr); + free (input_debug.external_rfd); + free (input_debug.external_ext); + + /* Hack: reset the SEC_HAS_CONTENTS flag so that + elf_link_input_bfd ignores this section. */ + input_section->flags &=~ SEC_HAS_CONTENTS; + } + +#ifdef ERIC_neverdef + if (info->shared) + { + /* Create .rtproc section. */ + rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc"); + if (rtproc_sec == NULL) + { + flagword flags = (SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | SEC_READONLY); + + rtproc_sec = bfd_make_section (abfd, ".rtproc"); + if (rtproc_sec == NULL + || ! bfd_set_section_flags (abfd, rtproc_sec, flags) + || ! bfd_set_section_alignment (abfd, rtproc_sec, 12)) + return false; + } + + if (! alpha_elf_create_procedure_table (mdebug_handle, abfd, + info, rtproc_sec, &debug)) + return false; + } +#endif + + + /* Build the external symbol information. */ + einfo.abfd = abfd; + einfo.info = info; + einfo.debug = &debug; + einfo.swap = swap; + einfo.failed = false; + elf_link_hash_traverse (elf_hash_table (info), + elf64_alpha_output_extsym, + (PTR) &einfo); + if (einfo.failed) + return false; + + /* Set the size of the .mdebug section. */ + o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap); + + /* Skip this section later on (I don't think this currently + matters, but someday it might). */ + o->link_order_head = (struct bfd_link_order *) NULL; + + mdebug_sec = o; + } + +#ifdef ERIC_neverdef + if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0) + { + const char *subname; + unsigned int c; + Elf64_gptab *tab; + Elf64_External_gptab *ext_tab; + unsigned int i; + + /* The .gptab.sdata and .gptab.sbss sections hold + information describing how the small data area would + change depending upon the -G switch. These sections + not used in executables files. */ + if (! info->relocateable) + { + asection **secpp; + + for (p = o->link_order_head; + p != (struct bfd_link_order *) NULL; + p = p->next) + { + asection *input_section; + + if (p->type != bfd_indirect_link_order) + { + if (p->type == bfd_fill_link_order) + continue; + abort (); + } + + input_section = p->u.indirect.section; + + /* Hack: reset the SEC_HAS_CONTENTS flag so that + elf_link_input_bfd ignores this section. */ + input_section->flags &=~ SEC_HAS_CONTENTS; + } + + /* Skip this section later on (I don't think this + currently matters, but someday it might). */ + o->link_order_head = (struct bfd_link_order *) NULL; + + /* Really remove the section. */ + for (secpp = &abfd->sections; + *secpp != o; + secpp = &(*secpp)->next) + ; + *secpp = (*secpp)->next; + --abfd->section_count; + + continue; + } + + /* There is one gptab for initialized data, and one for + uninitialized data. */ + if (strcmp (o->name, ".gptab.sdata") == 0) + gptab_data_sec = o; + else if (strcmp (o->name, ".gptab.sbss") == 0) + gptab_bss_sec = o; + else + { + (*_bfd_error_handler) + ("%s: illegal section name `%s'", + bfd_get_filename (abfd), o->name); + bfd_set_error (bfd_error_nonrepresentable_section); + return false; + } + + /* The linker script always combines .gptab.data and + .gptab.sdata into .gptab.sdata, and likewise for + .gptab.bss and .gptab.sbss. It is possible that there is + no .sdata or .sbss section in the output file, in which + case we must change the name of the output section. */ + subname = o->name + sizeof ".gptab" - 1; + if (bfd_get_section_by_name (abfd, subname) == NULL) + { + if (o == gptab_data_sec) + o->name = ".gptab.data"; + else + o->name = ".gptab.bss"; + subname = o->name + sizeof ".gptab" - 1; + BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL); + } + + /* Set up the first entry. */ + c = 1; + tab = (Elf64_gptab *) bfd_malloc (c * sizeof (Elf64_gptab)); + if (tab == NULL) + return false; + tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd); + tab[0].gt_header.gt_unused = 0; + + /* Combine the input sections. */ + for (p = o->link_order_head; + p != (struct bfd_link_order *) NULL; + p = p->next) + { + asection *input_section; + bfd *input_bfd; + bfd_size_type size; + unsigned long last; + bfd_size_type gpentry; + + if (p->type != bfd_indirect_link_order) + { + if (p->type == bfd_fill_link_order) + continue; + abort (); + } + + input_section = p->u.indirect.section; + input_bfd = input_section->owner; + + /* Combine the gptab entries for this input section one + by one. We know that the input gptab entries are + sorted by ascending -G value. */ + size = bfd_section_size (input_bfd, input_section); + last = 0; + for (gpentry = sizeof (Elf64_External_gptab); + gpentry < size; + gpentry += sizeof (Elf64_External_gptab)) + { + Elf64_External_gptab ext_gptab; + Elf64_gptab int_gptab; + unsigned long val; + unsigned long add; + boolean exact; + unsigned int look; + + if (! (bfd_get_section_contents + (input_bfd, input_section, (PTR) &ext_gptab, + gpentry, sizeof (Elf64_External_gptab)))) + { + free (tab); + return false; + } + + bfd_alpha_elf64_swap_gptab_in (input_bfd, &ext_gptab, + &int_gptab); + val = int_gptab.gt_entry.gt_g_value; + add = int_gptab.gt_entry.gt_bytes - last; + + exact = false; + for (look = 1; look < c; look++) + { + if (tab[look].gt_entry.gt_g_value >= val) + tab[look].gt_entry.gt_bytes += add; + + if (tab[look].gt_entry.gt_g_value == val) + exact = true; + } + + if (! exact) + { + Elf64_gptab *new_tab; + unsigned int max; + + /* We need a new table entry. */ + new_tab = ((Elf64_gptab *) + bfd_realloc ((PTR) tab, + (c + 1) * sizeof (Elf64_gptab))); + if (new_tab == NULL) + { + free (tab); + return false; + } + tab = new_tab; + tab[c].gt_entry.gt_g_value = val; + tab[c].gt_entry.gt_bytes = add; + + /* Merge in the size for the next smallest -G + value, since that will be implied by this new + value. */ + max = 0; + for (look = 1; look < c; look++) + { + if (tab[look].gt_entry.gt_g_value < val + && (max == 0 + || (tab[look].gt_entry.gt_g_value + > tab[max].gt_entry.gt_g_value))) + max = look; + } + if (max != 0) + tab[c].gt_entry.gt_bytes += + tab[max].gt_entry.gt_bytes; + + ++c; + } + + last = int_gptab.gt_entry.gt_bytes; + } + + /* Hack: reset the SEC_HAS_CONTENTS flag so that + elf_link_input_bfd ignores this section. */ + input_section->flags &=~ SEC_HAS_CONTENTS; + } + + /* The table must be sorted by -G value. */ + if (c > 2) + qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare); + + /* Swap out the table. */ + ext_tab = ((Elf64_External_gptab *) + bfd_alloc (abfd, c * sizeof (Elf64_External_gptab))); + if (ext_tab == NULL) + { + free (tab); + return false; + } + + for (i = 0; i < c; i++) + bfd_alpha_elf64_swap_gptab_out (abfd, tab + i, ext_tab + i); + free (tab); + + o->_raw_size = c * sizeof (Elf64_External_gptab); + o->contents = (bfd_byte *) ext_tab; + + /* Skip this section later on (I don't think this currently + matters, but someday it might). */ + o->link_order_head = (struct bfd_link_order *) NULL; + } +#endif + + } + + /* Invoke the regular ELF backend linker to do all the work. */ + if (! bfd_elf64_bfd_final_link (abfd, info)) + return false; + + /* Now write out the computed sections. */ + + /* The .got subsections... */ + { + bfd *i, *dynobj = elf_hash_table(info)->dynobj; + for (i = alpha_elf_hash_table(info)->got_list; + i != NULL; + i = alpha_elf_tdata(i)->got_link_next) + { + asection *sgot; + + /* elf_bfd_final_link already did everything in dynobj. */ + if (i == dynobj) + continue; + + sgot = alpha_elf_tdata(i)->got; + if (! bfd_set_section_contents (abfd, sgot->output_section, + sgot->contents, sgot->output_offset, + sgot->_raw_size)) + return false; + } + } + +#ifdef ERIC_neverdef + if (reginfo_sec != (asection *) NULL) + { + Elf64_External_RegInfo ext; + + bfd_alpha_elf64_swap_reginfo_out (abfd, ®info, &ext); + if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext, + (file_ptr) 0, sizeof ext)) + return false; + } +#endif + + if (mdebug_sec != (asection *) NULL) + { + BFD_ASSERT (abfd->output_has_begun); + if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, + swap, info, + mdebug_sec->filepos)) + return false; + + bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); + } + + if (gptab_data_sec != (asection *) NULL) + { + if (! bfd_set_section_contents (abfd, gptab_data_sec, + gptab_data_sec->contents, + (file_ptr) 0, + gptab_data_sec->_raw_size)) + return false; + } + + if (gptab_bss_sec != (asection *) NULL) + { + if (! bfd_set_section_contents (abfd, gptab_bss_sec, + gptab_bss_sec->contents, + (file_ptr) 0, + gptab_bss_sec->_raw_size)) + return false; + } + + return true; +} + +/* ECOFF swapping routines. These are used when dealing with the + .mdebug section, which is in the ECOFF debugging format. Copied + from elf32-mips.c. */ +static const struct ecoff_debug_swap +elf64_alpha_ecoff_debug_swap = +{ + /* Symbol table magic number. */ + magicSym2, + /* Alignment of debugging information. E.g., 4. */ + 8, + /* Sizes of external symbolic information. */ + sizeof (struct hdr_ext), + sizeof (struct dnr_ext), + sizeof (struct pdr_ext), + sizeof (struct sym_ext), + sizeof (struct opt_ext), + sizeof (struct fdr_ext), + sizeof (struct rfd_ext), + sizeof (struct ext_ext), + /* Functions to swap in external symbolic data. */ + ecoff_swap_hdr_in, + ecoff_swap_dnr_in, + ecoff_swap_pdr_in, + ecoff_swap_sym_in, + ecoff_swap_opt_in, + ecoff_swap_fdr_in, + ecoff_swap_rfd_in, + ecoff_swap_ext_in, + _bfd_ecoff_swap_tir_in, + _bfd_ecoff_swap_rndx_in, + /* Functions to swap out external symbolic data. */ + ecoff_swap_hdr_out, + ecoff_swap_dnr_out, + ecoff_swap_pdr_out, + ecoff_swap_sym_out, + ecoff_swap_opt_out, + ecoff_swap_fdr_out, + ecoff_swap_rfd_out, + ecoff_swap_ext_out, + _bfd_ecoff_swap_tir_out, + _bfd_ecoff_swap_rndx_out, + /* Function to read in symbolic data. */ + elf64_alpha_read_ecoff_info +}; + +#define TARGET_LITTLE_SYM bfd_elf64_alpha_vec +#define TARGET_LITTLE_NAME "elf64-alpha" +#define ELF_ARCH bfd_arch_alpha +#define ELF_MACHINE_CODE EM_ALPHA +#define ELF_MAXPAGESIZE 0x100000 + +#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 elf_info_to_howto \ + elf64_alpha_info_to_howto + +#define bfd_elf64_mkobject \ + elf64_alpha_mkobject +#define elf_backend_object_p \ + elf64_alpha_object_p + +#define elf_backend_section_from_shdr \ + elf64_alpha_section_from_shdr +#define elf_backend_fake_sections \ + elf64_alpha_fake_sections +#define elf_backend_additional_program_headers \ + elf64_alpha_additional_program_headers + +#define bfd_elf64_bfd_is_local_label_name \ + elf64_alpha_is_local_label_name +#define bfd_elf64_find_nearest_line \ + elf64_alpha_find_nearest_line + +#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_always_size_sections \ + elf64_alpha_always_size_sections +#define elf_backend_size_dynamic_sections \ + elf64_alpha_size_dynamic_sections +#define elf_backend_relocate_section \ + elf64_alpha_relocate_section +#define elf_backend_finish_dynamic_symbol \ + elf64_alpha_finish_dynamic_symbol +#define elf_backend_finish_dynamic_sections \ + elf64_alpha_finish_dynamic_sections +#define bfd_elf64_bfd_final_link \ + elf64_alpha_final_link + +#define elf_backend_ecoff_debug_swap \ + &elf64_alpha_ecoff_debug_swap + +/* + * A few constants that determine how the .plt section is set up. + */ +#define elf_backend_want_got_plt 0 +#define elf_backend_plt_readonly 0 +#define elf_backend_want_plt_sym 1 + +#include "elf64-target.h" |