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markom |
/* Support for 32-bit Alpha NLM (NetWare Loadable Module)
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Copyright 1993, 1994, 2000, 2001 Free Software Foundation, Inc.
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Written by Ian Lance Taylor, Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This file describes the 32 bit Alpha NLM format. You might think
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that an Alpha chip would use a 64 bit format, but, for some reason,
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it doesn't. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#define ARCH_SIZE 32
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#include "nlm/alpha-ext.h"
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#define Nlm_External_Fixed_Header Nlm32_alpha_External_Fixed_Header
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#include "libnlm.h"
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static boolean nlm_alpha_backend_object_p
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PARAMS ((bfd *));
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static boolean nlm_alpha_write_prefix
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PARAMS ((bfd *));
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static boolean nlm_alpha_read_reloc
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PARAMS ((bfd *, nlmNAME(symbol_type) *, asection **, arelent *));
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static boolean nlm_alpha_mangle_relocs
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PARAMS ((bfd *, asection *, PTR, bfd_vma, bfd_size_type));
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static boolean nlm_alpha_read_import
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PARAMS ((bfd *, nlmNAME(symbol_type) *));
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static boolean nlm_alpha_write_import
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PARAMS ((bfd *, asection *, arelent *));
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static boolean nlm_alpha_set_public_section
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PARAMS ((bfd *, nlmNAME(symbol_type) *));
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static bfd_vma nlm_alpha_get_public_offset
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PARAMS ((bfd *, asymbol *));
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static boolean nlm_alpha_write_external
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PARAMS ((bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *));
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/* Alpha NLM's have a prefix header before the standard NLM. This
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function reads it in, verifies the version, and seeks the bfd to
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the location before the regular NLM header. */
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static boolean
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nlm_alpha_backend_object_p (abfd)
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bfd *abfd;
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{
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struct nlm32_alpha_external_prefix_header s;
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bfd_size_type size;
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if (bfd_read ((PTR) &s, sizeof s, 1, abfd) != sizeof s)
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return false;
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if (bfd_h_get_32 (abfd, s.magic) != NLM32_ALPHA_MAGIC)
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return false;
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/* FIXME: Should we check the format number? */
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/* Skip to the end of the header. */
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size = bfd_h_get_32 (abfd, s.size);
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if (bfd_seek (abfd, size, SEEK_SET) != 0)
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return false;
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return true;
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}
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/* Write out the prefix. */
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static boolean
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nlm_alpha_write_prefix (abfd)
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bfd *abfd;
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{
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struct nlm32_alpha_external_prefix_header s;
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memset (&s, 0, sizeof s);
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bfd_h_put_32 (abfd, (bfd_vma) NLM32_ALPHA_MAGIC, s.magic);
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bfd_h_put_32 (abfd, (bfd_vma) 2, s.format);
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bfd_h_put_32 (abfd, (bfd_vma) sizeof s, s.size);
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if (bfd_write ((PTR) &s, sizeof s, 1, abfd) != sizeof s)
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return false;
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return true;
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}
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/* How to process the various reloc types. */
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static reloc_howto_type nlm32_alpha_howto_table[] =
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{
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/* Reloc type 0 is ignored by itself. However, it appears after a
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GPDISP reloc to identify the location where the low order 16 bits
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of the gp register are loaded. */
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HOWTO (ALPHA_R_IGNORE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"IGNORE", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* A 32 bit reference to a symbol. */
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HOWTO (ALPHA_R_REFLONG, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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0, /* special_function */
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"REFLONG", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 64 bit reference to a symbol. */
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HOWTO (ALPHA_R_REFQUAD, /* type */
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0, /* rightshift */
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4, /* size (0 = byte, 1 = short, 2 = long) */
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64, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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0, /* special_function */
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"REFQUAD", /* name */
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true, /* partial_inplace */
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0xffffffffffffffff, /* src_mask */
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0xffffffffffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 32 bit GP relative offset. This is just like REFLONG except
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that when the value is used the value of the gp register will be
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added in. */
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HOWTO (ALPHA_R_GPREL32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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0, /* special_function */
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"GPREL32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Used for an instruction that refers to memory off the GP
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register. The offset is 16 bits of the 32 bit instruction. This
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reloc always seems to be against the .lita section. */
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HOWTO (ALPHA_R_LITERAL, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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0, /* special_function */
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"LITERAL", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* This reloc only appears immediately following a LITERAL reloc.
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It identifies a use of the literal. It seems that the linker can
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use this to eliminate a portion of the .lita section. The symbol
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index is special: 1 means the literal address is in the base
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register of a memory format instruction; 2 means the literal
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address is in the byte offset register of a byte-manipulation
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instruction; 3 means the literal address is in the target
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register of a jsr instruction. This does not actually do any
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relocation. */
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HOWTO (ALPHA_R_LITUSE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"LITUSE", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* Load the gp register. This is always used for a ldah instruction
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which loads the upper 16 bits of the gp register. The next reloc
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will be an IGNORE reloc which identifies the location of the lda
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instruction which loads the lower 16 bits. The symbol index of
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the GPDISP instruction appears to actually be the number of bytes
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between the ldah and lda instructions. This gives two different
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ways to determine where the lda instruction is; I don't know why
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both are used. The value to use for the relocation is the
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difference between the GP value and the current location; the
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load will always be done against a register holding the current
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address. */
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HOWTO (ALPHA_R_GPDISP, /* type */
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16, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"GPDISP", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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true), /* pcrel_offset */
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/* A 21 bit branch. The native assembler generates these for
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branches within the text segment, and also fills in the PC
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relative offset in the instruction. It seems to me that this
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reloc, unlike the others, is not partial_inplace. */
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HOWTO (ALPHA_R_BRADDR, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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21, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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0, /* special_function */
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"BRADDR", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x1fffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A hint for a jump to a register. */
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HOWTO (ALPHA_R_HINT, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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14, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"HINT", /* name */
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true, /* partial_inplace */
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0x3fff, /* src_mask */
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0x3fff, /* dst_mask */
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false), /* pcrel_offset */
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/* 16 bit PC relative offset. */
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HOWTO (ALPHA_R_SREL16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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0, /* special_function */
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"SREL16", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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| 279 |
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/* 32 bit PC relative offset. */
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HOWTO (ALPHA_R_SREL32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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| 288 |
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0, /* special_function */
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"SREL32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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| 294 |
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/* A 64 bit PC relative offset. */
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HOWTO (ALPHA_R_SREL64, /* type */
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0, /* rightshift */
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4, /* size (0 = byte, 1 = short, 2 = long) */
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64, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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0, /* special_function */
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"SREL64", /* name */
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true, /* partial_inplace */
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0xffffffffffffffff, /* src_mask */
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0xffffffffffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Push a value on the reloc evaluation stack. */
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HOWTO (ALPHA_R_OP_PUSH, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"OP_PUSH", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* Store the value from the stack at the given address. Store it in
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|
a bitfield of size r_size starting at bit position r_offset. */
|
| 327 |
|
|
HOWTO (ALPHA_R_OP_STORE, /* type */
|
| 328 |
|
|
0, /* rightshift */
|
| 329 |
|
|
4, /* size (0 = byte, 1 = short, 2 = long) */
|
| 330 |
|
|
64, /* bitsize */
|
| 331 |
|
|
false, /* pc_relative */
|
| 332 |
|
|
0, /* bitpos */
|
| 333 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
| 334 |
|
|
0, /* special_function */
|
| 335 |
|
|
"OP_STORE", /* name */
|
| 336 |
|
|
false, /* partial_inplace */
|
| 337 |
|
|
0, /* src_mask */
|
| 338 |
|
|
0xffffffffffffffff, /* dst_mask */
|
| 339 |
|
|
false), /* pcrel_offset */
|
| 340 |
|
|
|
| 341 |
|
|
/* Subtract the reloc address from the value on the top of the
|
| 342 |
|
|
relocation stack. */
|
| 343 |
|
|
HOWTO (ALPHA_R_OP_PSUB, /* type */
|
| 344 |
|
|
0, /* rightshift */
|
| 345 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
| 346 |
|
|
0, /* bitsize */
|
| 347 |
|
|
false, /* pc_relative */
|
| 348 |
|
|
0, /* bitpos */
|
| 349 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
| 350 |
|
|
0, /* special_function */
|
| 351 |
|
|
"OP_PSUB", /* name */
|
| 352 |
|
|
false, /* partial_inplace */
|
| 353 |
|
|
0, /* src_mask */
|
| 354 |
|
|
0, /* dst_mask */
|
| 355 |
|
|
false), /* pcrel_offset */
|
| 356 |
|
|
|
| 357 |
|
|
/* Shift the value on the top of the relocation stack right by the
|
| 358 |
|
|
given value. */
|
| 359 |
|
|
HOWTO (ALPHA_R_OP_PRSHIFT, /* type */
|
| 360 |
|
|
0, /* rightshift */
|
| 361 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
| 362 |
|
|
0, /* bitsize */
|
| 363 |
|
|
false, /* pc_relative */
|
| 364 |
|
|
0, /* bitpos */
|
| 365 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
| 366 |
|
|
0, /* special_function */
|
| 367 |
|
|
"OP_PRSHIFT", /* name */
|
| 368 |
|
|
false, /* partial_inplace */
|
| 369 |
|
|
0, /* src_mask */
|
| 370 |
|
|
0, /* dst_mask */
|
| 371 |
|
|
false), /* pcrel_offset */
|
| 372 |
|
|
|
| 373 |
|
|
/* Adjust the GP value for a new range in the object file. */
|
| 374 |
|
|
HOWTO (ALPHA_R_GPVALUE, /* type */
|
| 375 |
|
|
0, /* rightshift */
|
| 376 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
| 377 |
|
|
0, /* bitsize */
|
| 378 |
|
|
false, /* pc_relative */
|
| 379 |
|
|
0, /* bitpos */
|
| 380 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
| 381 |
|
|
0, /* special_function */
|
| 382 |
|
|
"GPVALUE", /* name */
|
| 383 |
|
|
false, /* partial_inplace */
|
| 384 |
|
|
0, /* src_mask */
|
| 385 |
|
|
0, /* dst_mask */
|
| 386 |
|
|
false) /* pcrel_offset */
|
| 387 |
|
|
};
|
| 388 |
|
|
|
| 389 |
|
|
static reloc_howto_type nlm32_alpha_nw_howto =
|
| 390 |
|
|
HOWTO (ALPHA_R_NW_RELOC, /* type */
|
| 391 |
|
|
0, /* rightshift */
|
| 392 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
| 393 |
|
|
0, /* bitsize */
|
| 394 |
|
|
false, /* pc_relative */
|
| 395 |
|
|
0, /* bitpos */
|
| 396 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
| 397 |
|
|
0, /* special_function */
|
| 398 |
|
|
"NW_RELOC", /* name */
|
| 399 |
|
|
false, /* partial_inplace */
|
| 400 |
|
|
0, /* src_mask */
|
| 401 |
|
|
0, /* dst_mask */
|
| 402 |
|
|
false); /* pcrel_offset */
|
| 403 |
|
|
|
| 404 |
|
|
/* Read an Alpha NLM reloc. This routine keeps some static data which
|
| 405 |
|
|
it uses when handling local relocs. This only works correctly
|
| 406 |
|
|
because all the local relocs are read at once. */
|
| 407 |
|
|
|
| 408 |
|
|
static boolean
|
| 409 |
|
|
nlm_alpha_read_reloc (abfd, sym, secp, rel)
|
| 410 |
|
|
bfd *abfd;
|
| 411 |
|
|
nlmNAME(symbol_type) *sym;
|
| 412 |
|
|
asection **secp;
|
| 413 |
|
|
arelent *rel;
|
| 414 |
|
|
{
|
| 415 |
|
|
static bfd_vma gp_value;
|
| 416 |
|
|
static bfd_vma lita_address;
|
| 417 |
|
|
struct nlm32_alpha_external_reloc ext;
|
| 418 |
|
|
bfd_vma r_vaddr;
|
| 419 |
|
|
long r_symndx;
|
| 420 |
|
|
int r_type, r_extern, r_offset, r_size;
|
| 421 |
|
|
asection *code_sec, *data_sec;
|
| 422 |
|
|
|
| 423 |
|
|
/* Read the reloc from the file. */
|
| 424 |
|
|
if (bfd_read (&ext, sizeof ext, 1, abfd) != sizeof ext)
|
| 425 |
|
|
return false;
|
| 426 |
|
|
|
| 427 |
|
|
/* Swap in the reloc information. */
|
| 428 |
|
|
r_vaddr = bfd_h_get_64 (abfd, (bfd_byte *) ext.r_vaddr);
|
| 429 |
|
|
r_symndx = bfd_h_get_32 (abfd, (bfd_byte *) ext.r_symndx);
|
| 430 |
|
|
|
| 431 |
|
|
BFD_ASSERT (bfd_little_endian (abfd));
|
| 432 |
|
|
|
| 433 |
|
|
r_type = ((ext.r_bits[0] & RELOC_BITS0_TYPE_LITTLE)
|
| 434 |
|
|
>> RELOC_BITS0_TYPE_SH_LITTLE);
|
| 435 |
|
|
r_extern = (ext.r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0;
|
| 436 |
|
|
r_offset = ((ext.r_bits[1] & RELOC_BITS1_OFFSET_LITTLE)
|
| 437 |
|
|
>> RELOC_BITS1_OFFSET_SH_LITTLE);
|
| 438 |
|
|
/* Ignore the reserved bits. */
|
| 439 |
|
|
r_size = ((ext.r_bits[3] & RELOC_BITS3_SIZE_LITTLE)
|
| 440 |
|
|
>> RELOC_BITS3_SIZE_SH_LITTLE);
|
| 441 |
|
|
|
| 442 |
|
|
/* Fill in the BFD arelent structure. */
|
| 443 |
|
|
code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
|
| 444 |
|
|
data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
|
| 445 |
|
|
if (r_extern)
|
| 446 |
|
|
{
|
| 447 |
|
|
/* External relocations are only used for imports. */
|
| 448 |
|
|
BFD_ASSERT (sym != NULL);
|
| 449 |
|
|
/* We don't need to set sym_ptr_ptr for this case. It is set in
|
| 450 |
|
|
nlm_canonicalize_reloc. */
|
| 451 |
|
|
rel->sym_ptr_ptr = NULL;
|
| 452 |
|
|
rel->addend = 0;
|
| 453 |
|
|
}
|
| 454 |
|
|
else
|
| 455 |
|
|
{
|
| 456 |
|
|
/* Internal relocations are only used for local relocation
|
| 457 |
|
|
fixups. If they are not NW_RELOC or GPDISP or IGNORE, they
|
| 458 |
|
|
must be against .text or .data. */
|
| 459 |
|
|
BFD_ASSERT (r_type == ALPHA_R_NW_RELOC || sym == NULL);
|
| 460 |
|
|
if (r_type == ALPHA_R_NW_RELOC
|
| 461 |
|
|
|| r_type == ALPHA_R_GPDISP
|
| 462 |
|
|
|| r_type == ALPHA_R_IGNORE)
|
| 463 |
|
|
{
|
| 464 |
|
|
rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
| 465 |
|
|
rel->addend = 0;
|
| 466 |
|
|
}
|
| 467 |
|
|
else if (r_symndx == ALPHA_RELOC_SECTION_TEXT)
|
| 468 |
|
|
{
|
| 469 |
|
|
rel->sym_ptr_ptr = code_sec->symbol_ptr_ptr;
|
| 470 |
|
|
BFD_ASSERT (bfd_get_section_vma (abfd, code_sec) == 0);
|
| 471 |
|
|
rel->addend = 0;
|
| 472 |
|
|
}
|
| 473 |
|
|
else if (r_symndx == ALPHA_RELOC_SECTION_DATA)
|
| 474 |
|
|
{
|
| 475 |
|
|
rel->sym_ptr_ptr = data_sec->symbol_ptr_ptr;
|
| 476 |
|
|
rel->addend = - bfd_get_section_vma (abfd, data_sec);
|
| 477 |
|
|
}
|
| 478 |
|
|
else
|
| 479 |
|
|
{
|
| 480 |
|
|
BFD_ASSERT (0);
|
| 481 |
|
|
rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
| 482 |
|
|
rel->addend = 0;
|
| 483 |
|
|
}
|
| 484 |
|
|
}
|
| 485 |
|
|
|
| 486 |
|
|
/* We use the address to determine whether the reloc is in the .text
|
| 487 |
|
|
or .data section. R_NW_RELOC relocs don't really have a section,
|
| 488 |
|
|
so we put them in .text. */
|
| 489 |
|
|
if (r_type == ALPHA_R_NW_RELOC
|
| 490 |
|
|
|| r_vaddr < bfd_section_size (abfd, code_sec))
|
| 491 |
|
|
{
|
| 492 |
|
|
*secp = code_sec;
|
| 493 |
|
|
rel->address = r_vaddr;
|
| 494 |
|
|
}
|
| 495 |
|
|
else
|
| 496 |
|
|
{
|
| 497 |
|
|
*secp = data_sec;
|
| 498 |
|
|
rel->address = r_vaddr - bfd_section_size (abfd, code_sec);
|
| 499 |
|
|
}
|
| 500 |
|
|
|
| 501 |
|
|
/* We must adjust the addend based on the type. */
|
| 502 |
|
|
BFD_ASSERT ((r_type >= 0 && r_type <= ALPHA_R_GPVALUE)
|
| 503 |
|
|
|| r_type == ALPHA_R_NW_RELOC);
|
| 504 |
|
|
|
| 505 |
|
|
switch (r_type)
|
| 506 |
|
|
{
|
| 507 |
|
|
case ALPHA_R_BRADDR:
|
| 508 |
|
|
case ALPHA_R_SREL16:
|
| 509 |
|
|
case ALPHA_R_SREL32:
|
| 510 |
|
|
case ALPHA_R_SREL64:
|
| 511 |
|
|
/* The PC relative relocs do not seem to use the section VMA as
|
| 512 |
|
|
a negative addend. */
|
| 513 |
|
|
rel->addend = 0;
|
| 514 |
|
|
break;
|
| 515 |
|
|
|
| 516 |
|
|
case ALPHA_R_GPREL32:
|
| 517 |
|
|
/* Copy the gp value for this object file into the addend, to
|
| 518 |
|
|
ensure that we are not confused by the linker. */
|
| 519 |
|
|
if (! r_extern)
|
| 520 |
|
|
rel->addend += gp_value;
|
| 521 |
|
|
break;
|
| 522 |
|
|
|
| 523 |
|
|
case ALPHA_R_LITERAL:
|
| 524 |
|
|
BFD_ASSERT (! r_extern);
|
| 525 |
|
|
rel->addend += lita_address;
|
| 526 |
|
|
break;
|
| 527 |
|
|
|
| 528 |
|
|
case ALPHA_R_LITUSE:
|
| 529 |
|
|
case ALPHA_R_GPDISP:
|
| 530 |
|
|
/* The LITUSE and GPDISP relocs do not use a symbol, or an
|
| 531 |
|
|
addend, but they do use a special code. Put this code in the
|
| 532 |
|
|
addend field. */
|
| 533 |
|
|
rel->addend = r_symndx;
|
| 534 |
|
|
rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
| 535 |
|
|
break;
|
| 536 |
|
|
|
| 537 |
|
|
case ALPHA_R_OP_STORE:
|
| 538 |
|
|
/* The STORE reloc needs the size and offset fields. We store
|
| 539 |
|
|
them in the addend. */
|
| 540 |
|
|
BFD_ASSERT (r_offset < 256 && r_size < 256);
|
| 541 |
|
|
rel->addend = (r_offset << 8) + r_size;
|
| 542 |
|
|
break;
|
| 543 |
|
|
|
| 544 |
|
|
case ALPHA_R_OP_PUSH:
|
| 545 |
|
|
case ALPHA_R_OP_PSUB:
|
| 546 |
|
|
case ALPHA_R_OP_PRSHIFT:
|
| 547 |
|
|
/* The PUSH, PSUB and PRSHIFT relocs do not actually use an
|
| 548 |
|
|
address. I believe that the address supplied is really an
|
| 549 |
|
|
addend. */
|
| 550 |
|
|
rel->addend = r_vaddr;
|
| 551 |
|
|
break;
|
| 552 |
|
|
|
| 553 |
|
|
case ALPHA_R_GPVALUE:
|
| 554 |
|
|
/* Record the new gp value. */
|
| 555 |
|
|
gp_value += r_symndx;
|
| 556 |
|
|
rel->addend = gp_value;
|
| 557 |
|
|
break;
|
| 558 |
|
|
|
| 559 |
|
|
case ALPHA_R_IGNORE:
|
| 560 |
|
|
/* If the type is ALPHA_R_IGNORE, make sure this is a reference
|
| 561 |
|
|
to the absolute section so that the reloc is ignored. For
|
| 562 |
|
|
some reason the address of this reloc type is not adjusted by
|
| 563 |
|
|
the section vma. We record the gp value for this object file
|
| 564 |
|
|
here, for convenience when doing the GPDISP relocation. */
|
| 565 |
|
|
rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
| 566 |
|
|
rel->address = r_vaddr;
|
| 567 |
|
|
rel->addend = gp_value;
|
| 568 |
|
|
break;
|
| 569 |
|
|
|
| 570 |
|
|
case ALPHA_R_NW_RELOC:
|
| 571 |
|
|
/* If this is SETGP, we set the addend to 0. Otherwise we set
|
| 572 |
|
|
the addend to the size of the .lita section (this is
|
| 573 |
|
|
r_symndx) plus 1. We have already set the address of the
|
| 574 |
|
|
reloc to r_vaddr. */
|
| 575 |
|
|
if (r_size == ALPHA_R_NW_RELOC_SETGP)
|
| 576 |
|
|
{
|
| 577 |
|
|
gp_value = r_vaddr;
|
| 578 |
|
|
rel->addend = 0;
|
| 579 |
|
|
}
|
| 580 |
|
|
else if (r_size == ALPHA_R_NW_RELOC_LITA)
|
| 581 |
|
|
{
|
| 582 |
|
|
lita_address = r_vaddr;
|
| 583 |
|
|
rel->addend = r_symndx + 1;
|
| 584 |
|
|
}
|
| 585 |
|
|
else
|
| 586 |
|
|
BFD_ASSERT (0);
|
| 587 |
|
|
rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
| 588 |
|
|
break;
|
| 589 |
|
|
|
| 590 |
|
|
default:
|
| 591 |
|
|
break;
|
| 592 |
|
|
}
|
| 593 |
|
|
|
| 594 |
|
|
if (r_type == ALPHA_R_NW_RELOC)
|
| 595 |
|
|
rel->howto = &nlm32_alpha_nw_howto;
|
| 596 |
|
|
else
|
| 597 |
|
|
rel->howto = &nlm32_alpha_howto_table[r_type];
|
| 598 |
|
|
|
| 599 |
|
|
return true;
|
| 600 |
|
|
}
|
| 601 |
|
|
|
| 602 |
|
|
/* Mangle Alpha NLM relocs for output. */
|
| 603 |
|
|
|
| 604 |
|
|
static boolean
|
| 605 |
|
|
nlm_alpha_mangle_relocs (abfd, sec, data, offset, count)
|
| 606 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
| 607 |
|
|
asection *sec ATTRIBUTE_UNUSED;
|
| 608 |
|
|
PTR data ATTRIBUTE_UNUSED;
|
| 609 |
|
|
bfd_vma offset ATTRIBUTE_UNUSED;
|
| 610 |
|
|
bfd_size_type count ATTRIBUTE_UNUSED;
|
| 611 |
|
|
{
|
| 612 |
|
|
return true;
|
| 613 |
|
|
}
|
| 614 |
|
|
|
| 615 |
|
|
/* Read an ALPHA NLM import record */
|
| 616 |
|
|
|
| 617 |
|
|
static boolean
|
| 618 |
|
|
nlm_alpha_read_import (abfd, sym)
|
| 619 |
|
|
bfd *abfd;
|
| 620 |
|
|
nlmNAME(symbol_type) *sym;
|
| 621 |
|
|
{
|
| 622 |
|
|
struct nlm_relent *nlm_relocs; /* relocation records for symbol */
|
| 623 |
|
|
bfd_size_type rcount; /* number of relocs */
|
| 624 |
|
|
bfd_byte temp[NLM_TARGET_LONG_SIZE]; /* temporary 32-bit value */
|
| 625 |
|
|
unsigned char symlength; /* length of symbol name */
|
| 626 |
|
|
char *name;
|
| 627 |
|
|
|
| 628 |
|
|
if (bfd_read ((PTR) &symlength, sizeof (symlength), 1, abfd)
|
| 629 |
|
|
!= sizeof (symlength))
|
| 630 |
|
|
return false;
|
| 631 |
|
|
sym -> symbol.the_bfd = abfd;
|
| 632 |
|
|
name = bfd_alloc (abfd, symlength + 1);
|
| 633 |
|
|
if (name == NULL)
|
| 634 |
|
|
return false;
|
| 635 |
|
|
if (bfd_read (name, symlength, 1, abfd) != symlength)
|
| 636 |
|
|
return false;
|
| 637 |
|
|
name[symlength] = '\0';
|
| 638 |
|
|
sym -> symbol.name = name;
|
| 639 |
|
|
sym -> symbol.flags = 0;
|
| 640 |
|
|
sym -> symbol.value = 0;
|
| 641 |
|
|
sym -> symbol.section = bfd_und_section_ptr;
|
| 642 |
|
|
if (bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp))
|
| 643 |
|
|
return false;
|
| 644 |
|
|
rcount = bfd_h_get_32 (abfd, temp);
|
| 645 |
|
|
nlm_relocs = ((struct nlm_relent *)
|
| 646 |
|
|
bfd_alloc (abfd, rcount * sizeof (struct nlm_relent)));
|
| 647 |
|
|
if (!nlm_relocs)
|
| 648 |
|
|
return false;
|
| 649 |
|
|
sym -> relocs = nlm_relocs;
|
| 650 |
|
|
sym -> rcnt = 0;
|
| 651 |
|
|
while (sym -> rcnt < rcount)
|
| 652 |
|
|
{
|
| 653 |
|
|
asection *section;
|
| 654 |
|
|
|
| 655 |
|
|
if (nlm_alpha_read_reloc (abfd, sym, §ion,
|
| 656 |
|
|
&nlm_relocs -> reloc)
|
| 657 |
|
|
== false)
|
| 658 |
|
|
return false;
|
| 659 |
|
|
nlm_relocs -> section = section;
|
| 660 |
|
|
nlm_relocs++;
|
| 661 |
|
|
sym -> rcnt++;
|
| 662 |
|
|
}
|
| 663 |
|
|
|
| 664 |
|
|
return true;
|
| 665 |
|
|
}
|
| 666 |
|
|
|
| 667 |
|
|
/* Write an Alpha NLM reloc. */
|
| 668 |
|
|
|
| 669 |
|
|
static boolean
|
| 670 |
|
|
nlm_alpha_write_import (abfd, sec, rel)
|
| 671 |
|
|
bfd *abfd;
|
| 672 |
|
|
asection *sec;
|
| 673 |
|
|
arelent *rel;
|
| 674 |
|
|
{
|
| 675 |
|
|
asymbol *sym;
|
| 676 |
|
|
bfd_vma r_vaddr;
|
| 677 |
|
|
long r_symndx;
|
| 678 |
|
|
int r_type, r_extern, r_offset, r_size;
|
| 679 |
|
|
struct nlm32_alpha_external_reloc ext;
|
| 680 |
|
|
|
| 681 |
|
|
sym = *rel->sym_ptr_ptr;
|
| 682 |
|
|
|
| 683 |
|
|
/* Get values for the relocation fields. */
|
| 684 |
|
|
r_type = rel->howto->type;
|
| 685 |
|
|
if (r_type != ALPHA_R_NW_RELOC)
|
| 686 |
|
|
{
|
| 687 |
|
|
r_vaddr = bfd_get_section_vma (abfd, sec) + rel->address;
|
| 688 |
|
|
if ((sec->flags & SEC_CODE) == 0)
|
| 689 |
|
|
r_vaddr += bfd_section_size (abfd,
|
| 690 |
|
|
bfd_get_section_by_name (abfd,
|
| 691 |
|
|
NLM_CODE_NAME));
|
| 692 |
|
|
if (bfd_is_und_section (bfd_get_section (sym)))
|
| 693 |
|
|
{
|
| 694 |
|
|
r_extern = 1;
|
| 695 |
|
|
r_symndx = 0;
|
| 696 |
|
|
}
|
| 697 |
|
|
else
|
| 698 |
|
|
{
|
| 699 |
|
|
r_extern = 0;
|
| 700 |
|
|
if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE)
|
| 701 |
|
|
r_symndx = ALPHA_RELOC_SECTION_TEXT;
|
| 702 |
|
|
else
|
| 703 |
|
|
r_symndx = ALPHA_RELOC_SECTION_DATA;
|
| 704 |
|
|
}
|
| 705 |
|
|
r_offset = 0;
|
| 706 |
|
|
r_size = 0;
|
| 707 |
|
|
|
| 708 |
|
|
switch (r_type)
|
| 709 |
|
|
{
|
| 710 |
|
|
case ALPHA_R_LITUSE:
|
| 711 |
|
|
case ALPHA_R_GPDISP:
|
| 712 |
|
|
r_symndx = rel->addend;
|
| 713 |
|
|
break;
|
| 714 |
|
|
|
| 715 |
|
|
case ALPHA_R_OP_STORE:
|
| 716 |
|
|
r_size = rel->addend & 0xff;
|
| 717 |
|
|
r_offset = (rel->addend >> 8) & 0xff;
|
| 718 |
|
|
break;
|
| 719 |
|
|
|
| 720 |
|
|
case ALPHA_R_OP_PUSH:
|
| 721 |
|
|
case ALPHA_R_OP_PSUB:
|
| 722 |
|
|
case ALPHA_R_OP_PRSHIFT:
|
| 723 |
|
|
r_vaddr = rel->addend;
|
| 724 |
|
|
break;
|
| 725 |
|
|
|
| 726 |
|
|
case ALPHA_R_IGNORE:
|
| 727 |
|
|
r_vaddr = rel->address;
|
| 728 |
|
|
break;
|
| 729 |
|
|
|
| 730 |
|
|
default:
|
| 731 |
|
|
break;
|
| 732 |
|
|
}
|
| 733 |
|
|
}
|
| 734 |
|
|
else
|
| 735 |
|
|
{
|
| 736 |
|
|
/* r_type == ALPHA_R_NW_RELOC */
|
| 737 |
|
|
r_vaddr = rel->address;
|
| 738 |
|
|
if (rel->addend == 0)
|
| 739 |
|
|
{
|
| 740 |
|
|
r_symndx = 0;
|
| 741 |
|
|
r_size = ALPHA_R_NW_RELOC_SETGP;
|
| 742 |
|
|
}
|
| 743 |
|
|
else
|
| 744 |
|
|
{
|
| 745 |
|
|
r_symndx = rel->addend - 1;
|
| 746 |
|
|
r_size = ALPHA_R_NW_RELOC_LITA;
|
| 747 |
|
|
}
|
| 748 |
|
|
r_extern = 0;
|
| 749 |
|
|
r_offset = 0;
|
| 750 |
|
|
}
|
| 751 |
|
|
|
| 752 |
|
|
/* Swap out the relocation fields. */
|
| 753 |
|
|
bfd_h_put_64 (abfd, r_vaddr, (bfd_byte *) ext.r_vaddr);
|
| 754 |
|
|
bfd_h_put_32 (abfd, r_symndx, (bfd_byte *) ext.r_symndx);
|
| 755 |
|
|
|
| 756 |
|
|
BFD_ASSERT (bfd_little_endian (abfd));
|
| 757 |
|
|
|
| 758 |
|
|
ext.r_bits[0] = ((r_type << RELOC_BITS0_TYPE_SH_LITTLE)
|
| 759 |
|
|
& RELOC_BITS0_TYPE_LITTLE);
|
| 760 |
|
|
ext.r_bits[1] = ((r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0)
|
| 761 |
|
|
| ((r_offset << RELOC_BITS1_OFFSET_SH_LITTLE)
|
| 762 |
|
|
& RELOC_BITS1_OFFSET_LITTLE));
|
| 763 |
|
|
ext.r_bits[2] = 0;
|
| 764 |
|
|
ext.r_bits[3] = ((r_size << RELOC_BITS3_SIZE_SH_LITTLE)
|
| 765 |
|
|
& RELOC_BITS3_SIZE_LITTLE);
|
| 766 |
|
|
|
| 767 |
|
|
/* Write out the relocation. */
|
| 768 |
|
|
if (bfd_write (&ext, sizeof ext, 1, abfd) != sizeof ext)
|
| 769 |
|
|
return false;
|
| 770 |
|
|
|
| 771 |
|
|
return true;
|
| 772 |
|
|
}
|
| 773 |
|
|
|
| 774 |
|
|
/* Alpha NetWare does not use the high bit to determine whether a
|
| 775 |
|
|
public symbol is in the code segment or the data segment. Instead,
|
| 776 |
|
|
it just uses the address. The set_public_section and
|
| 777 |
|
|
get_public_offset routines override the default code which uses the
|
| 778 |
|
|
high bit. */
|
| 779 |
|
|
|
| 780 |
|
|
/* Set the section for a public symbol. */
|
| 781 |
|
|
|
| 782 |
|
|
static boolean
|
| 783 |
|
|
nlm_alpha_set_public_section (abfd, sym)
|
| 784 |
|
|
bfd *abfd;
|
| 785 |
|
|
nlmNAME(symbol_type) *sym;
|
| 786 |
|
|
{
|
| 787 |
|
|
asection *code_sec, *data_sec;
|
| 788 |
|
|
|
| 789 |
|
|
code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
|
| 790 |
|
|
data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
|
| 791 |
|
|
if (sym->symbol.value < bfd_section_size (abfd, code_sec))
|
| 792 |
|
|
{
|
| 793 |
|
|
sym->symbol.section = code_sec;
|
| 794 |
|
|
sym->symbol.flags |= BSF_FUNCTION;
|
| 795 |
|
|
}
|
| 796 |
|
|
else
|
| 797 |
|
|
{
|
| 798 |
|
|
sym->symbol.section = data_sec;
|
| 799 |
|
|
sym->symbol.value -= bfd_section_size (abfd, code_sec);
|
| 800 |
|
|
/* The data segment had better be aligned. */
|
| 801 |
|
|
BFD_ASSERT ((bfd_section_size (abfd, code_sec) & 0xf) == 0);
|
| 802 |
|
|
}
|
| 803 |
|
|
return true;
|
| 804 |
|
|
}
|
| 805 |
|
|
|
| 806 |
|
|
/* Get the offset to write out for a public symbol. */
|
| 807 |
|
|
|
| 808 |
|
|
static bfd_vma
|
| 809 |
|
|
nlm_alpha_get_public_offset (abfd, sym)
|
| 810 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
| 811 |
|
|
asymbol *sym;
|
| 812 |
|
|
{
|
| 813 |
|
|
return bfd_asymbol_value (sym);
|
| 814 |
|
|
}
|
| 815 |
|
|
|
| 816 |
|
|
/* Write an Alpha NLM external symbol. */
|
| 817 |
|
|
|
| 818 |
|
|
static boolean
|
| 819 |
|
|
nlm_alpha_write_external (abfd, count, sym, relocs)
|
| 820 |
|
|
bfd *abfd;
|
| 821 |
|
|
bfd_size_type count;
|
| 822 |
|
|
asymbol *sym;
|
| 823 |
|
|
struct reloc_and_sec *relocs;
|
| 824 |
|
|
{
|
| 825 |
|
|
int i;
|
| 826 |
|
|
bfd_byte len;
|
| 827 |
|
|
unsigned char temp[NLM_TARGET_LONG_SIZE];
|
| 828 |
|
|
arelent r;
|
| 829 |
|
|
|
| 830 |
|
|
len = strlen (sym->name);
|
| 831 |
|
|
if ((bfd_write (&len, sizeof (bfd_byte), 1, abfd) != sizeof (bfd_byte))
|
| 832 |
|
|
|| bfd_write (sym->name, len, 1, abfd) != len)
|
| 833 |
|
|
return false;
|
| 834 |
|
|
|
| 835 |
|
|
bfd_put_32 (abfd, count + 2, temp);
|
| 836 |
|
|
if (bfd_write (temp, sizeof (temp), 1, abfd) != sizeof (temp))
|
| 837 |
|
|
return false;
|
| 838 |
|
|
|
| 839 |
|
|
/* The first two relocs for each external symbol are the .lita
|
| 840 |
|
|
address and the GP value. */
|
| 841 |
|
|
r.sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
| 842 |
|
|
r.howto = &nlm32_alpha_nw_howto;
|
| 843 |
|
|
|
| 844 |
|
|
r.address = nlm_alpha_backend_data (abfd)->lita_address;
|
| 845 |
|
|
r.addend = nlm_alpha_backend_data (abfd)->lita_size + 1;
|
| 846 |
|
|
if (nlm_alpha_write_import (abfd, (asection *) NULL, &r) == false)
|
| 847 |
|
|
return false;
|
| 848 |
|
|
|
| 849 |
|
|
r.address = nlm_alpha_backend_data (abfd)->gp;
|
| 850 |
|
|
r.addend = 0;
|
| 851 |
|
|
if (nlm_alpha_write_import (abfd, (asection *) NULL, &r) == false)
|
| 852 |
|
|
return false;
|
| 853 |
|
|
|
| 854 |
|
|
for (i = 0; i < count; i++)
|
| 855 |
|
|
{
|
| 856 |
|
|
if (nlm_alpha_write_import (abfd, relocs[i].sec,
|
| 857 |
|
|
relocs[i].rel) == false)
|
| 858 |
|
|
return false;
|
| 859 |
|
|
}
|
| 860 |
|
|
|
| 861 |
|
|
return true;
|
| 862 |
|
|
}
|
| 863 |
|
|
|
| 864 |
|
|
#include "nlmswap.h"
|
| 865 |
|
|
|
| 866 |
|
|
static const struct nlm_backend_data nlm32_alpha_backend =
|
| 867 |
|
|
{
|
| 868 |
|
|
"NetWare Alpha Module \032",
|
| 869 |
|
|
sizeof (Nlm32_alpha_External_Fixed_Header),
|
| 870 |
|
|
sizeof (struct nlm32_alpha_external_prefix_header),
|
| 871 |
|
|
bfd_arch_alpha,
|
| 872 |
|
|
0,
|
| 873 |
|
|
true, /* no uninitialized data permitted by Alpha NetWare. */
|
| 874 |
|
|
nlm_alpha_backend_object_p,
|
| 875 |
|
|
nlm_alpha_write_prefix,
|
| 876 |
|
|
nlm_alpha_read_reloc,
|
| 877 |
|
|
nlm_alpha_mangle_relocs,
|
| 878 |
|
|
nlm_alpha_read_import,
|
| 879 |
|
|
nlm_alpha_write_import,
|
| 880 |
|
|
nlm_alpha_set_public_section,
|
| 881 |
|
|
nlm_alpha_get_public_offset,
|
| 882 |
|
|
nlm_swap_fixed_header_in,
|
| 883 |
|
|
nlm_swap_fixed_header_out,
|
| 884 |
|
|
nlm_alpha_write_external,
|
| 885 |
|
|
0, /* write_export */
|
| 886 |
|
|
};
|
| 887 |
|
|
|
| 888 |
|
|
#define TARGET_LITTLE_NAME "nlm32-alpha"
|
| 889 |
|
|
#define TARGET_LITTLE_SYM nlmNAME(alpha_vec)
|
| 890 |
|
|
#define TARGET_BACKEND_DATA &nlm32_alpha_backend
|
| 891 |
|
|
|
| 892 |
|
|
#include "nlm-target.h"
|
