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jeremybenn |
/* Support for 32-bit PowerPC NLM (NetWare Loadable Module)
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Copyright 1994, 1995, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
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2007 Free Software Foundation, Inc.
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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 3 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., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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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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/* The format of a PowerPC NLM changed. Define OLDFORMAT to get the
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old format. */
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#define ARCH_SIZE 32
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#include "nlm/ppc-ext.h"
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#define Nlm_External_Fixed_Header Nlm32_powerpc_External_Fixed_Header
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#include "libnlm.h"
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#ifdef OLDFORMAT
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/* The prefix header is only used in the old format. */
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/* PowerPC 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 bfd_boolean
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nlm_powerpc_backend_object_p (bfd *abfd)
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{
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struct nlm32_powerpc_external_prefix_header s;
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if (bfd_bread (& s, (bfd_size_type) sizeof s, abfd) != sizeof s)
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return FALSE;
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if (memcmp (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature) != 0
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|| H_GET_32 (abfd, s.headerVersion) != NLM32_POWERPC_HEADER_VERSION)
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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 bfd_boolean
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nlm_powerpc_write_prefix (bfd *abfd)
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{
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struct nlm32_powerpc_external_prefix_header s;
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memset (&s, 0, sizeof s);
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memcpy (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature);
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H_PUT_32 (abfd, NLM32_POWERPC_HEADER_VERSION, s.headerVersion);
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H_PUT_32 (abfd, 0, s.origins);
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/* FIXME: What should we do about the date? */
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if (bfd_bwrite (& s, (bfd_size_type) sizeof s, abfd) != sizeof s)
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return FALSE;
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return TRUE;
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}
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/* This reloc handling is only applicable to the old format. */
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/* How to process the various reloc types. PowerPC NLMs use XCOFF
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reloc types, and I have just copied the XCOFF reloc table here. */
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static reloc_howto_type nlm_powerpc_howto_table[] =
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{
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/* Standard 32 bit relocation. */
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HOWTO (0, /* 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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"R_POS", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffffffff, /* Source mask. */
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0xffffffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* 32 bit relocation, but store negative value. */
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HOWTO (1, /* 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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"R_NEG", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffffffff, /* Source mask. */
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0xffffffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* 32 bit PC relative relocation. */
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HOWTO (2, /* 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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0, /* Special_function. */
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"R_REL", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffffffff, /* Source mask. */
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0xffffffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* 16 bit TOC relative relocation. */
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HOWTO (3, /* 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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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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"R_TOC", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* I don't really know what this is. */
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HOWTO (4, /* Type. */
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1, /* 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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"R_RTB", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffffffff, /* Source mask. */
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0xffffffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* External TOC relative symbol. */
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HOWTO (5, /* 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_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_GL", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Local TOC relative symbol. */
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HOWTO (6, /* 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_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_TCL", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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{ 7 },
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/* Non modifiable absolute branch. */
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HOWTO (8, /* Type. */
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0, /* Rightshift. */
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2, /* Size (0 = byte, 1 = short, 2 = long). */
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26, /* 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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"R_BA", /* Name. */
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TRUE, /* Partial_inplace. */
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0x3fffffc, /* Source mask. */
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0x3fffffc, /* Dest mask. */
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FALSE), /* PC rel offset. */
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{ 9 },
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/* Non modifiable relative branch. */
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HOWTO (0xa, /* Type. */
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0, /* Rightshift. */
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2, /* Size (0 = byte, 1 = short, 2 = long). */
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26, /* 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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"R_BR", /* Name. */
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TRUE, /* Partial_inplace. */
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0x3fffffc, /* Source mask. */
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0x3fffffc, /* Dest mask. */
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FALSE), /* PC rel offset. */
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{ 0xb },
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/* Indirect load. */
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HOWTO (0xc, /* 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_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_RL", /* Name. */
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TRUE, /* Partial_inplace. */
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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/* Load address. */
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HOWTO (0xd, /* 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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249 |
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complain_overflow_bitfield, /* Complain_on_overflow. */
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0, /* Special_function. */
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"R_RLA", /* Name. */
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TRUE, /* Partial_inplace. */
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253 |
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0xffff, /* Source mask. */
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0xffff, /* Dest mask. */
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FALSE), /* PC rel offset. */
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257 |
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{ 0xe },
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258 |
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259 |
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/* Non-relocating reference. */
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260 |
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HOWTO (0xf, /* 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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264 |
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FALSE, /* PC relative. */
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0, /* Bitpos. */
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266 |
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complain_overflow_bitfield, /* Complain_on_overflow. */
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267 |
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0, /* Special_function. */
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268 |
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"R_REF", /* Name. */
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269 |
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FALSE, /* Partial_inplace. */
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270 |
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0, /* Source mask. */
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271 |
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0, /* Dest mask. */
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272 |
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FALSE), /* PC rel offset. */
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273 |
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274 |
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{ 0x10 },
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{ 0x11 },
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276 |
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277 |
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/* TOC relative indirect load. */
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278 |
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HOWTO (0x12, /* Type. */
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279 |
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0, /* Rightshift. */
|
280 |
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2, /* Size (0 = byte, 1 = short, 2 = long). */
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281 |
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16, /* Bitsize. */
|
282 |
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FALSE, /* PC relative. */
|
283 |
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0, /* Bitpos. */
|
284 |
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complain_overflow_bitfield, /* Complain_on_overflow. */
|
285 |
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0, /* Special_function. */
|
286 |
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"R_TRL", /* Name. */
|
287 |
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TRUE, /* Partial_inplace. */
|
288 |
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0xffff, /* Source mask. */
|
289 |
|
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0xffff, /* Dest mask. */
|
290 |
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FALSE), /* PC rel offset. */
|
291 |
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|
292 |
|
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/* TOC relative load address. */
|
293 |
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HOWTO (0x13, /* Type. */
|
294 |
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0, /* Rightshift. */
|
295 |
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2, /* Size (0 = byte, 1 = short, 2 = long). */
|
296 |
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16, /* Bitsize. */
|
297 |
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FALSE, /* PC relative. */
|
298 |
|
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0, /* Bitpos. */
|
299 |
|
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complain_overflow_bitfield, /* Complain_on_overflow. */
|
300 |
|
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0, /* Special_function. */
|
301 |
|
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"R_TRLA", /* Name. */
|
302 |
|
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TRUE, /* Partial_inplace. */
|
303 |
|
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0xffff, /* Source mask. */
|
304 |
|
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0xffff, /* Dest mask. */
|
305 |
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FALSE), /* PC rel offset. */
|
306 |
|
|
|
307 |
|
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/* Modifiable relative branch. */
|
308 |
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HOWTO (0x14, /* Type. */
|
309 |
|
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1, /* Rightshift. */
|
310 |
|
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2, /* Size (0 = byte, 1 = short, 2 = long). */
|
311 |
|
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32, /* Bitsize. */
|
312 |
|
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FALSE, /* PC relative. */
|
313 |
|
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0, /* Bitpos. */
|
314 |
|
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complain_overflow_bitfield, /* Complain_on_overflow. */
|
315 |
|
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0, /* Special_function. */
|
316 |
|
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"R_RRTBI", /* Name. */
|
317 |
|
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TRUE, /* Partial_inplace. */
|
318 |
|
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0xffffffff, /* Source mask. */
|
319 |
|
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0xffffffff, /* Dest mask. */
|
320 |
|
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FALSE), /* PC rel offset. */
|
321 |
|
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|
322 |
|
|
/* Modifiable absolute branch. */
|
323 |
|
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HOWTO (0x15, /* Type. */
|
324 |
|
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1, /* Rightshift. */
|
325 |
|
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2, /* Size (0 = byte, 1 = short, 2 = long). */
|
326 |
|
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32, /* Bitsize. */
|
327 |
|
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FALSE, /* PC relative. */
|
328 |
|
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0, /* Bitpos. */
|
329 |
|
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complain_overflow_bitfield, /* Complain_on_overflow. */
|
330 |
|
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0, /* Special_function. */
|
331 |
|
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"R_RRTBA", /* Name. */
|
332 |
|
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TRUE, /* Partial_inplace. */
|
333 |
|
|
0xffffffff, /* Source mask. */
|
334 |
|
|
0xffffffff, /* Dest mask. */
|
335 |
|
|
FALSE), /* PC rel offset. */
|
336 |
|
|
|
337 |
|
|
/* Modifiable call absolute indirect. */
|
338 |
|
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HOWTO (0x16, /* Type. */
|
339 |
|
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0, /* Rightshift. */
|
340 |
|
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2, /* Size (0 = byte, 1 = short, 2 = long). */
|
341 |
|
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16, /* Bitsize. */
|
342 |
|
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FALSE, /* PC relative. */
|
343 |
|
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0, /* Bitpos. */
|
344 |
|
|
complain_overflow_bitfield, /* Complain_on_overflow. */
|
345 |
|
|
0, /* Special_function. */
|
346 |
|
|
"R_CAI", /* Name. */
|
347 |
|
|
TRUE, /* Partial_inplace. */
|
348 |
|
|
0xffff, /* Source mask. */
|
349 |
|
|
0xffff, /* Dest mask. */
|
350 |
|
|
FALSE), /* PC rel offset. */
|
351 |
|
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|
352 |
|
|
/* Modifiable call relative. */
|
353 |
|
|
HOWTO (0x17, /* Type. */
|
354 |
|
|
0, /* Rightshift. */
|
355 |
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
356 |
|
|
16, /* Bitsize. */
|
357 |
|
|
FALSE, /* PC relative. */
|
358 |
|
|
0, /* Bitpos. */
|
359 |
|
|
complain_overflow_bitfield, /* Complain_on_overflow. */
|
360 |
|
|
0, /* Special_function. */
|
361 |
|
|
"R_REL", /* Name. */
|
362 |
|
|
TRUE, /* Partial_inplace. */
|
363 |
|
|
0xffff, /* Source mask. */
|
364 |
|
|
0xffff, /* Dest mask. */
|
365 |
|
|
FALSE), /* PC rel offset. */
|
366 |
|
|
|
367 |
|
|
/* Modifiable branch absolute. */
|
368 |
|
|
HOWTO (0x18, /* Type. */
|
369 |
|
|
0, /* Rightshift. */
|
370 |
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
371 |
|
|
16, /* Bitsize. */
|
372 |
|
|
FALSE, /* PC relative. */
|
373 |
|
|
0, /* Bitpos. */
|
374 |
|
|
complain_overflow_bitfield, /* Complain_on_overflow. */
|
375 |
|
|
0, /* Special_function. */
|
376 |
|
|
"R_RBA", /* Name. */
|
377 |
|
|
TRUE, /* Partial_inplace. */
|
378 |
|
|
0xffff, /* Source mask. */
|
379 |
|
|
0xffff, /* Dest mask. */
|
380 |
|
|
FALSE), /* PC rel offset. */
|
381 |
|
|
|
382 |
|
|
/* Modifiable branch absolute. */
|
383 |
|
|
HOWTO (0x19, /* Type. */
|
384 |
|
|
0, /* Rightshift. */
|
385 |
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
386 |
|
|
16, /* Bitsize. */
|
387 |
|
|
FALSE, /* PC relative. */
|
388 |
|
|
0, /* Bitpos. */
|
389 |
|
|
complain_overflow_bitfield, /* Complain_on_overflow. */
|
390 |
|
|
0, /* Special_function. */
|
391 |
|
|
"R_RBAC", /* Name. */
|
392 |
|
|
TRUE, /* Partial_inplace. */
|
393 |
|
|
0xffff, /* Source mask. */
|
394 |
|
|
0xffff, /* Dest mask. */
|
395 |
|
|
FALSE), /* PC rel offset. */
|
396 |
|
|
|
397 |
|
|
/* Modifiable branch relative. */
|
398 |
|
|
HOWTO (0x1a, /* Type. */
|
399 |
|
|
0, /* Rightshift. */
|
400 |
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
401 |
|
|
26, /* Bitsize. */
|
402 |
|
|
FALSE, /* PC relative. */
|
403 |
|
|
0, /* Bitpos. */
|
404 |
|
|
complain_overflow_signed, /* Complain_on_overflow. */
|
405 |
|
|
0, /* Special_function. */
|
406 |
|
|
"R_REL", /* Name. */
|
407 |
|
|
TRUE, /* Partial_inplace. */
|
408 |
|
|
0xffff, /* Source mask. */
|
409 |
|
|
0xffff, /* Dest mask. */
|
410 |
|
|
FALSE), /* PC rel offset. */
|
411 |
|
|
|
412 |
|
|
/* Modifiable branch absolute. */
|
413 |
|
|
HOWTO (0x1b, /* Type. */
|
414 |
|
|
0, /* Rightshift. */
|
415 |
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
416 |
|
|
16, /* Bitsize. */
|
417 |
|
|
FALSE, /* PC relative. */
|
418 |
|
|
0, /* Bitpos. */
|
419 |
|
|
complain_overflow_bitfield, /* Complain_on_overflow. */
|
420 |
|
|
0, /* Special_function. */
|
421 |
|
|
"R_REL", /* Name. */
|
422 |
|
|
TRUE, /* Partial_inplace. */
|
423 |
|
|
0xffff, /* Source mask. */
|
424 |
|
|
0xffff, /* Dest mask. */
|
425 |
|
|
FALSE) /* PC rel offset. */
|
426 |
|
|
};
|
427 |
|
|
|
428 |
|
|
#define HOWTO_COUNT (sizeof nlm_powerpc_howto_table \
|
429 |
|
|
/ sizeof nlm_powerpc_howto_table[0])
|
430 |
|
|
|
431 |
|
|
/* Read a PowerPC NLM reloc. */
|
432 |
|
|
|
433 |
|
|
static bfd_boolean
|
434 |
|
|
nlm_powerpc_read_reloc (bfd *abfd,
|
435 |
|
|
nlmNAME (symbol_type) *sym,
|
436 |
|
|
asection **secp,
|
437 |
|
|
arelent *rel)
|
438 |
|
|
{
|
439 |
|
|
struct nlm32_powerpc_external_reloc ext;
|
440 |
|
|
bfd_vma l_vaddr;
|
441 |
|
|
unsigned long l_symndx;
|
442 |
|
|
int l_rtype;
|
443 |
|
|
int l_rsecnm;
|
444 |
|
|
asection *code_sec, *data_sec, *bss_sec;
|
445 |
|
|
|
446 |
|
|
/* Read the reloc from the file. */
|
447 |
|
|
if (bfd_bread (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext)
|
448 |
|
|
return FALSE;
|
449 |
|
|
|
450 |
|
|
/* Swap in the fields. */
|
451 |
|
|
l_vaddr = H_GET_32 (abfd, ext.l_vaddr);
|
452 |
|
|
l_symndx = H_GET_32 (abfd, ext.l_symndx);
|
453 |
|
|
l_rtype = H_GET_16 (abfd, ext.l_rtype);
|
454 |
|
|
l_rsecnm = H_GET_16 (abfd, ext.l_rsecnm);
|
455 |
|
|
|
456 |
|
|
/* Get the sections now, for convenience. */
|
457 |
|
|
code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
|
458 |
|
|
data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
|
459 |
|
|
bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME);
|
460 |
|
|
|
461 |
|
|
/* Work out the arelent fields. */
|
462 |
|
|
if (sym != NULL)
|
463 |
|
|
/* This is an import. sym_ptr_ptr is filled in by
|
464 |
|
|
nlm_canonicalize_reloc. */
|
465 |
|
|
rel->sym_ptr_ptr = NULL;
|
466 |
|
|
else
|
467 |
|
|
{
|
468 |
|
|
asection *sec;
|
469 |
|
|
|
470 |
|
|
if (l_symndx == 0)
|
471 |
|
|
sec = code_sec;
|
472 |
|
|
else if (l_symndx == 1)
|
473 |
|
|
sec = data_sec;
|
474 |
|
|
else if (l_symndx == 2)
|
475 |
|
|
sec = bss_sec;
|
476 |
|
|
else
|
477 |
|
|
{
|
478 |
|
|
bfd_set_error (bfd_error_bad_value);
|
479 |
|
|
return FALSE;
|
480 |
|
|
}
|
481 |
|
|
|
482 |
|
|
rel->sym_ptr_ptr = sec->symbol_ptr_ptr;
|
483 |
|
|
}
|
484 |
|
|
|
485 |
|
|
rel->addend = 0;
|
486 |
|
|
|
487 |
|
|
BFD_ASSERT ((l_rtype & 0xff) < HOWTO_COUNT);
|
488 |
|
|
|
489 |
|
|
rel->howto = nlm_powerpc_howto_table + (l_rtype & 0xff);
|
490 |
|
|
|
491 |
|
|
BFD_ASSERT (rel->howto->name != NULL
|
492 |
|
|
&& ((l_rtype & 0x8000) != 0
|
493 |
|
|
? (rel->howto->complain_on_overflow
|
494 |
|
|
== complain_overflow_signed)
|
495 |
|
|
: (rel->howto->complain_on_overflow
|
496 |
|
|
== complain_overflow_bitfield))
|
497 |
|
|
&& ((l_rtype >> 8) & 0x1f) == rel->howto->bitsize - 1);
|
498 |
|
|
|
499 |
|
|
if (l_rsecnm == 0)
|
500 |
|
|
*secp = code_sec;
|
501 |
|
|
else if (l_rsecnm == 1)
|
502 |
|
|
{
|
503 |
|
|
*secp = data_sec;
|
504 |
|
|
l_vaddr -= code_sec->size;
|
505 |
|
|
}
|
506 |
|
|
else
|
507 |
|
|
{
|
508 |
|
|
bfd_set_error (bfd_error_bad_value);
|
509 |
|
|
return FALSE;
|
510 |
|
|
}
|
511 |
|
|
|
512 |
|
|
rel->address = l_vaddr;
|
513 |
|
|
|
514 |
|
|
return TRUE;
|
515 |
|
|
}
|
516 |
|
|
|
517 |
|
|
#else /* not OLDFORMAT */
|
518 |
|
|
|
519 |
|
|
/* There is only one type of reloc in a PowerPC NLM. */
|
520 |
|
|
|
521 |
|
|
static reloc_howto_type nlm_powerpc_howto =
|
522 |
|
|
HOWTO (0, /* Type. */
|
523 |
|
|
0, /* Rightshift. */
|
524 |
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
525 |
|
|
32, /* Bitsize. */
|
526 |
|
|
FALSE, /* PC relative. */
|
527 |
|
|
0, /* Bitpos. */
|
528 |
|
|
complain_overflow_bitfield, /* Complain_on_overflow. */
|
529 |
|
|
0, /* Special_function. */
|
530 |
|
|
"32", /* Name. */
|
531 |
|
|
TRUE, /* Partial_inplace. */
|
532 |
|
|
0xffffffff, /* Source mask. */
|
533 |
|
|
0xffffffff, /* Dest mask. */
|
534 |
|
|
FALSE); /* PC rel_offset. */
|
535 |
|
|
|
536 |
|
|
/* Read a PowerPC NLM reloc. */
|
537 |
|
|
|
538 |
|
|
static bfd_boolean
|
539 |
|
|
nlm_powerpc_read_reloc (bfd *abfd,
|
540 |
|
|
nlmNAME (symbol_type) *sym,
|
541 |
|
|
asection **secp,
|
542 |
|
|
arelent *rel)
|
543 |
|
|
{
|
544 |
|
|
bfd_byte temp[4];
|
545 |
|
|
bfd_vma val;
|
546 |
|
|
const char *name;
|
547 |
|
|
|
548 |
|
|
if (bfd_bread (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp))
|
549 |
|
|
return FALSE;
|
550 |
|
|
|
551 |
|
|
val = bfd_get_32 (abfd, temp);
|
552 |
|
|
|
553 |
|
|
/* The value is a word offset into either the code or data segment.
|
554 |
|
|
This is the location which needs to be adjusted.
|
555 |
|
|
|
556 |
|
|
The high bit is 0 if the value is an offset into the data
|
557 |
|
|
segment, or 1 if the value is an offset into the text segment.
|
558 |
|
|
|
559 |
|
|
If this is a relocation fixup rather than an imported symbol (the
|
560 |
|
|
sym argument is NULL), then the second most significant bit is 0
|
561 |
|
|
if the address of the data segment should be added to the
|
562 |
|
|
location addressed by the value, or 1 if the address of the text
|
563 |
|
|
segment should be added.
|
564 |
|
|
|
565 |
|
|
If this is an imported symbol, the second most significant bit is
|
566 |
|
|
not used and must be 0. */
|
567 |
|
|
|
568 |
|
|
if ((val & NLM_HIBIT) == 0)
|
569 |
|
|
name = NLM_INITIALIZED_DATA_NAME;
|
570 |
|
|
else
|
571 |
|
|
{
|
572 |
|
|
name = NLM_CODE_NAME;
|
573 |
|
|
val &=~ NLM_HIBIT;
|
574 |
|
|
}
|
575 |
|
|
*secp = bfd_get_section_by_name (abfd, name);
|
576 |
|
|
|
577 |
|
|
if (sym == NULL)
|
578 |
|
|
{
|
579 |
|
|
if ((val & (NLM_HIBIT >> 1)) == 0)
|
580 |
|
|
name = NLM_INITIALIZED_DATA_NAME;
|
581 |
|
|
else
|
582 |
|
|
{
|
583 |
|
|
name = NLM_CODE_NAME;
|
584 |
|
|
val &=~ (NLM_HIBIT >> 1);
|
585 |
|
|
}
|
586 |
|
|
rel->sym_ptr_ptr = bfd_get_section_by_name (abfd, name)->symbol_ptr_ptr;
|
587 |
|
|
}
|
588 |
|
|
|
589 |
|
|
rel->howto = & nlm_powerpc_howto;
|
590 |
|
|
rel->address = val << 2;
|
591 |
|
|
rel->addend = 0;
|
592 |
|
|
|
593 |
|
|
return TRUE;
|
594 |
|
|
}
|
595 |
|
|
|
596 |
|
|
#endif /* not OLDFORMAT */
|
597 |
|
|
|
598 |
|
|
/* Mangle PowerPC NLM relocs for output. */
|
599 |
|
|
|
600 |
|
|
static bfd_boolean
|
601 |
|
|
nlm_powerpc_mangle_relocs (bfd *abfd ATTRIBUTE_UNUSED,
|
602 |
|
|
asection *sec ATTRIBUTE_UNUSED,
|
603 |
|
|
const void * data ATTRIBUTE_UNUSED,
|
604 |
|
|
bfd_vma offset ATTRIBUTE_UNUSED,
|
605 |
|
|
bfd_size_type count ATTRIBUTE_UNUSED)
|
606 |
|
|
{
|
607 |
|
|
return TRUE;
|
608 |
|
|
}
|
609 |
|
|
|
610 |
|
|
/* Read a PowerPC NLM import record */
|
611 |
|
|
|
612 |
|
|
static bfd_boolean
|
613 |
|
|
nlm_powerpc_read_import (bfd * abfd, nlmNAME (symbol_type) * sym)
|
614 |
|
|
{
|
615 |
|
|
struct nlm_relent *nlm_relocs; /* Relocation records for symbol. */
|
616 |
|
|
bfd_size_type rcount; /* Number of relocs. */
|
617 |
|
|
bfd_byte temp[NLM_TARGET_LONG_SIZE]; /* Temporary 32-bit value. */
|
618 |
|
|
unsigned char symlength; /* Length of symbol name. */
|
619 |
|
|
char *name;
|
620 |
|
|
|
621 |
|
|
if (bfd_bread (& symlength, (bfd_size_type) sizeof (symlength), abfd)
|
622 |
|
|
!= sizeof (symlength))
|
623 |
|
|
return FALSE;
|
624 |
|
|
sym -> symbol.the_bfd = abfd;
|
625 |
|
|
name = bfd_alloc (abfd, (bfd_size_type) symlength + 1);
|
626 |
|
|
if (name == NULL)
|
627 |
|
|
return FALSE;
|
628 |
|
|
if (bfd_bread (name, (bfd_size_type) symlength, abfd) != symlength)
|
629 |
|
|
return FALSE;
|
630 |
|
|
name[symlength] = '\0';
|
631 |
|
|
sym -> symbol.name = name;
|
632 |
|
|
sym -> symbol.flags = 0;
|
633 |
|
|
sym -> symbol.value = 0;
|
634 |
|
|
sym -> symbol.section = bfd_und_section_ptr;
|
635 |
|
|
if (bfd_bread (temp, (bfd_size_type) sizeof (temp), abfd)
|
636 |
|
|
!= sizeof (temp))
|
637 |
|
|
return FALSE;
|
638 |
|
|
rcount = H_GET_32 (abfd, temp);
|
639 |
|
|
nlm_relocs = bfd_alloc (abfd, rcount * sizeof (struct nlm_relent));
|
640 |
|
|
if (nlm_relocs == NULL)
|
641 |
|
|
return FALSE;
|
642 |
|
|
sym -> relocs = nlm_relocs;
|
643 |
|
|
sym -> rcnt = 0;
|
644 |
|
|
while (sym -> rcnt < rcount)
|
645 |
|
|
{
|
646 |
|
|
asection *section;
|
647 |
|
|
|
648 |
|
|
if (! nlm_powerpc_read_reloc (abfd, sym, §ion, &nlm_relocs -> reloc))
|
649 |
|
|
return FALSE;
|
650 |
|
|
nlm_relocs -> section = section;
|
651 |
|
|
nlm_relocs++;
|
652 |
|
|
sym -> rcnt++;
|
653 |
|
|
}
|
654 |
|
|
return TRUE;
|
655 |
|
|
}
|
656 |
|
|
|
657 |
|
|
#ifndef OLDFORMAT
|
658 |
|
|
|
659 |
|
|
/* Write a PowerPC NLM reloc. */
|
660 |
|
|
|
661 |
|
|
static bfd_boolean
|
662 |
|
|
nlm_powerpc_write_import (bfd * abfd, asection * sec, arelent * rel)
|
663 |
|
|
{
|
664 |
|
|
asymbol *sym;
|
665 |
|
|
bfd_vma val;
|
666 |
|
|
bfd_byte temp[4];
|
667 |
|
|
|
668 |
|
|
/* PowerPC NetWare only supports one kind of reloc. */
|
669 |
|
|
if (rel->addend != 0
|
670 |
|
|
|| rel->howto == NULL
|
671 |
|
|
|| rel->howto->rightshift != 0
|
672 |
|
|
|| rel->howto->size != 2
|
673 |
|
|
|| rel->howto->bitsize != 32
|
674 |
|
|
|| rel->howto->bitpos != 0
|
675 |
|
|
|| rel->howto->pc_relative
|
676 |
|
|
|| (rel->howto->src_mask != 0xffffffff && rel->addend != 0)
|
677 |
|
|
|| rel->howto->dst_mask != 0xffffffff)
|
678 |
|
|
{
|
679 |
|
|
bfd_set_error (bfd_error_invalid_operation);
|
680 |
|
|
return FALSE;
|
681 |
|
|
}
|
682 |
|
|
|
683 |
|
|
sym = *rel->sym_ptr_ptr;
|
684 |
|
|
|
685 |
|
|
/* The value we write out is the offset into the appropriate
|
686 |
|
|
segment, rightshifted by two. This offset is the section vma,
|
687 |
|
|
adjusted by the vma of the lowest section in that segment, plus
|
688 |
|
|
the address of the relocation. */
|
689 |
|
|
val = bfd_get_section_vma (abfd, sec) + rel->address;
|
690 |
|
|
if ((val & 3) != 0)
|
691 |
|
|
{
|
692 |
|
|
bfd_set_error (bfd_error_bad_value);
|
693 |
|
|
return FALSE;
|
694 |
|
|
}
|
695 |
|
|
val >>= 2;
|
696 |
|
|
|
697 |
|
|
/* The high bit is 0 if the reloc is in the data section, or 1 if
|
698 |
|
|
the reloc is in the code section. */
|
699 |
|
|
if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
|
700 |
|
|
val -= nlm_get_data_low (abfd);
|
701 |
|
|
else
|
702 |
|
|
{
|
703 |
|
|
val -= nlm_get_text_low (abfd);
|
704 |
|
|
val |= NLM_HIBIT;
|
705 |
|
|
}
|
706 |
|
|
|
707 |
|
|
if (! bfd_is_und_section (bfd_get_section (sym)))
|
708 |
|
|
{
|
709 |
|
|
/* This is an internal relocation fixup. The second most
|
710 |
|
|
significant bit is 0 if this is a reloc against the data
|
711 |
|
|
segment, or 1 if it is a reloc against the text segment. */
|
712 |
|
|
if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE)
|
713 |
|
|
val |= NLM_HIBIT >> 1;
|
714 |
|
|
}
|
715 |
|
|
|
716 |
|
|
bfd_put_32 (abfd, val, temp);
|
717 |
|
|
if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp))
|
718 |
|
|
return FALSE;
|
719 |
|
|
|
720 |
|
|
return TRUE;
|
721 |
|
|
}
|
722 |
|
|
|
723 |
|
|
#else /* OLDFORMAT */
|
724 |
|
|
|
725 |
|
|
/* This is used for the reloc handling in the old format. */
|
726 |
|
|
|
727 |
|
|
/* Write a PowerPC NLM reloc. */
|
728 |
|
|
|
729 |
|
|
static bfd_boolean
|
730 |
|
|
nlm_powerpc_write_reloc (bfd *abfd,
|
731 |
|
|
asection *sec,
|
732 |
|
|
arelent *rel,
|
733 |
|
|
int indx)
|
734 |
|
|
{
|
735 |
|
|
struct nlm32_powerpc_external_reloc ext;
|
736 |
|
|
asection *code_sec, *data_sec, *bss_sec;
|
737 |
|
|
asymbol *sym;
|
738 |
|
|
asection *symsec;
|
739 |
|
|
unsigned long l_symndx;
|
740 |
|
|
int l_rtype;
|
741 |
|
|
int l_rsecnm;
|
742 |
|
|
reloc_howto_type *howto;
|
743 |
|
|
bfd_size_type address;
|
744 |
|
|
|
745 |
|
|
/* Get the sections now, for convenience. */
|
746 |
|
|
code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
|
747 |
|
|
data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
|
748 |
|
|
bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME);
|
749 |
|
|
|
750 |
|
|
sym = *rel->sym_ptr_ptr;
|
751 |
|
|
symsec = bfd_get_section (sym);
|
752 |
|
|
if (indx != -1)
|
753 |
|
|
{
|
754 |
|
|
BFD_ASSERT (bfd_is_und_section (symsec));
|
755 |
|
|
l_symndx = indx + 3;
|
756 |
|
|
}
|
757 |
|
|
else
|
758 |
|
|
{
|
759 |
|
|
if (symsec == code_sec)
|
760 |
|
|
l_symndx = 0;
|
761 |
|
|
else if (symsec == data_sec)
|
762 |
|
|
l_symndx = 1;
|
763 |
|
|
else if (symsec == bss_sec)
|
764 |
|
|
l_symndx = 2;
|
765 |
|
|
else
|
766 |
|
|
{
|
767 |
|
|
bfd_set_error (bfd_error_bad_value);
|
768 |
|
|
return FALSE;
|
769 |
|
|
}
|
770 |
|
|
}
|
771 |
|
|
|
772 |
|
|
H_PUT_32 (abfd, l_symndx, ext.l_symndx);
|
773 |
|
|
|
774 |
|
|
for (howto = nlm_powerpc_howto_table;
|
775 |
|
|
howto < nlm_powerpc_howto_table + HOWTO_COUNT;
|
776 |
|
|
howto++)
|
777 |
|
|
{
|
778 |
|
|
if (howto->rightshift == rel->howto->rightshift
|
779 |
|
|
&& howto->size == rel->howto->size
|
780 |
|
|
&& howto->bitsize == rel->howto->bitsize
|
781 |
|
|
&& howto->pc_relative == rel->howto->pc_relative
|
782 |
|
|
&& howto->bitpos == rel->howto->bitpos
|
783 |
|
|
&& (howto->partial_inplace == rel->howto->partial_inplace
|
784 |
|
|
|| (! rel->howto->partial_inplace
|
785 |
|
|
&& rel->addend == 0))
|
786 |
|
|
&& (howto->src_mask == rel->howto->src_mask
|
787 |
|
|
|| (rel->howto->src_mask == 0
|
788 |
|
|
&& rel->addend == 0))
|
789 |
|
|
&& howto->dst_mask == rel->howto->dst_mask
|
790 |
|
|
&& howto->pcrel_offset == rel->howto->pcrel_offset)
|
791 |
|
|
break;
|
792 |
|
|
}
|
793 |
|
|
if (howto >= nlm_powerpc_howto_table + HOWTO_COUNT)
|
794 |
|
|
{
|
795 |
|
|
bfd_set_error (bfd_error_bad_value);
|
796 |
|
|
return FALSE;
|
797 |
|
|
}
|
798 |
|
|
|
799 |
|
|
l_rtype = howto->type;
|
800 |
|
|
if (howto->complain_on_overflow == complain_overflow_signed)
|
801 |
|
|
l_rtype |= 0x8000;
|
802 |
|
|
l_rtype |= (howto->bitsize - 1) << 8;
|
803 |
|
|
H_PUT_16 (abfd, l_rtype, ext.l_rtype);
|
804 |
|
|
|
805 |
|
|
address = rel->address;
|
806 |
|
|
|
807 |
|
|
if (sec == code_sec)
|
808 |
|
|
l_rsecnm = 0;
|
809 |
|
|
else if (sec == data_sec)
|
810 |
|
|
{
|
811 |
|
|
l_rsecnm = 1;
|
812 |
|
|
address += code_sec->size;
|
813 |
|
|
}
|
814 |
|
|
else
|
815 |
|
|
{
|
816 |
|
|
bfd_set_error (bfd_error_bad_value);
|
817 |
|
|
return FALSE;
|
818 |
|
|
}
|
819 |
|
|
|
820 |
|
|
H_PUT_16 (abfd, l_rsecnm, ext.l_rsecnm);
|
821 |
|
|
H_PUT_32 (abfd, address, ext.l_vaddr);
|
822 |
|
|
|
823 |
|
|
if (bfd_bwrite (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext)
|
824 |
|
|
return FALSE;
|
825 |
|
|
|
826 |
|
|
return TRUE;
|
827 |
|
|
}
|
828 |
|
|
|
829 |
|
|
/* Write a PowerPC NLM import. */
|
830 |
|
|
|
831 |
|
|
static bfd_boolean
|
832 |
|
|
nlm_powerpc_write_import (bfd * abfd, asection * sec, arelent * rel)
|
833 |
|
|
{
|
834 |
|
|
return nlm_powerpc_write_reloc (abfd, sec, rel, -1);
|
835 |
|
|
}
|
836 |
|
|
|
837 |
|
|
#endif /* OLDFORMAT */
|
838 |
|
|
|
839 |
|
|
/* Write a PowerPC NLM external symbol. This routine keeps a static
|
840 |
|
|
count of the symbol index. FIXME: I don't know if this is
|
841 |
|
|
necessary, and the index never gets reset. */
|
842 |
|
|
|
843 |
|
|
static bfd_boolean
|
844 |
|
|
nlm_powerpc_write_external (bfd *abfd,
|
845 |
|
|
bfd_size_type count,
|
846 |
|
|
asymbol *sym,
|
847 |
|
|
struct reloc_and_sec *relocs)
|
848 |
|
|
{
|
849 |
|
|
unsigned int i;
|
850 |
|
|
bfd_byte len;
|
851 |
|
|
unsigned char temp[NLM_TARGET_LONG_SIZE];
|
852 |
|
|
#ifdef OLDFORMAT
|
853 |
|
|
static int indx;
|
854 |
|
|
#endif
|
855 |
|
|
|
856 |
|
|
len = strlen (sym->name);
|
857 |
|
|
if ((bfd_bwrite (&len, (bfd_size_type) sizeof (bfd_byte), abfd)
|
858 |
|
|
!= sizeof (bfd_byte))
|
859 |
|
|
|| bfd_bwrite (sym->name, (bfd_size_type) len, abfd) != len)
|
860 |
|
|
return FALSE;
|
861 |
|
|
|
862 |
|
|
bfd_put_32 (abfd, count, temp);
|
863 |
|
|
if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp))
|
864 |
|
|
return FALSE;
|
865 |
|
|
|
866 |
|
|
for (i = 0; i < count; i++)
|
867 |
|
|
{
|
868 |
|
|
#ifndef OLDFORMAT
|
869 |
|
|
if (! nlm_powerpc_write_import (abfd, relocs[i].sec, relocs[i].rel))
|
870 |
|
|
return FALSE;
|
871 |
|
|
#else
|
872 |
|
|
if (! nlm_powerpc_write_reloc (abfd, relocs[i].sec,
|
873 |
|
|
relocs[i].rel, indx))
|
874 |
|
|
return FALSE;
|
875 |
|
|
#endif
|
876 |
|
|
}
|
877 |
|
|
|
878 |
|
|
#ifdef OLDFORMAT
|
879 |
|
|
++indx;
|
880 |
|
|
#endif
|
881 |
|
|
|
882 |
|
|
return TRUE;
|
883 |
|
|
}
|
884 |
|
|
|
885 |
|
|
#ifndef OLDFORMAT
|
886 |
|
|
|
887 |
|
|
/* PowerPC Netware uses a word offset, not a byte offset, for public
|
888 |
|
|
symbols. */
|
889 |
|
|
|
890 |
|
|
/* Set the section for a public symbol. */
|
891 |
|
|
|
892 |
|
|
static bfd_boolean
|
893 |
|
|
nlm_powerpc_set_public_section (bfd *abfd, nlmNAME (symbol_type) *sym)
|
894 |
|
|
{
|
895 |
|
|
if (sym->symbol.value & NLM_HIBIT)
|
896 |
|
|
{
|
897 |
|
|
sym->symbol.value &= ~NLM_HIBIT;
|
898 |
|
|
sym->symbol.flags |= BSF_FUNCTION;
|
899 |
|
|
sym->symbol.section =
|
900 |
|
|
bfd_get_section_by_name (abfd, NLM_CODE_NAME);
|
901 |
|
|
}
|
902 |
|
|
else
|
903 |
|
|
sym->symbol.section =
|
904 |
|
|
bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
|
905 |
|
|
|
906 |
|
|
sym->symbol.value <<= 2;
|
907 |
|
|
|
908 |
|
|
return TRUE;
|
909 |
|
|
}
|
910 |
|
|
|
911 |
|
|
/* Get the offset to write out for a public symbol. */
|
912 |
|
|
|
913 |
|
|
static bfd_vma
|
914 |
|
|
nlm_powerpc_get_public_offset (bfd *abfd, asymbol *sym)
|
915 |
|
|
{
|
916 |
|
|
bfd_vma offset;
|
917 |
|
|
asection *sec;
|
918 |
|
|
|
919 |
|
|
offset = bfd_asymbol_value (sym);
|
920 |
|
|
sec = bfd_get_section (sym);
|
921 |
|
|
if (sec->flags & SEC_CODE)
|
922 |
|
|
{
|
923 |
|
|
offset -= nlm_get_text_low (abfd);
|
924 |
|
|
offset |= NLM_HIBIT;
|
925 |
|
|
}
|
926 |
|
|
else if (sec->flags & (SEC_DATA | SEC_ALLOC))
|
927 |
|
|
{
|
928 |
|
|
/* SEC_ALLOC is for the .bss section. */
|
929 |
|
|
offset -= nlm_get_data_low (abfd);
|
930 |
|
|
}
|
931 |
|
|
else
|
932 |
|
|
{
|
933 |
|
|
/* We can't handle an exported symbol that is not in the code or
|
934 |
|
|
data segment. */
|
935 |
|
|
bfd_set_error (bfd_error_invalid_operation);
|
936 |
|
|
/* FIXME: No way to return error. */
|
937 |
|
|
abort ();
|
938 |
|
|
}
|
939 |
|
|
|
940 |
|
|
return offset;
|
941 |
|
|
}
|
942 |
|
|
|
943 |
|
|
#endif /* ! defined (OLDFORMAT) */
|
944 |
|
|
|
945 |
|
|
#include "nlmswap.h"
|
946 |
|
|
|
947 |
|
|
static const struct nlm_backend_data nlm32_powerpc_backend =
|
948 |
|
|
{
|
949 |
|
|
"NetWare PowerPC Module \032",
|
950 |
|
|
sizeof (Nlm32_powerpc_External_Fixed_Header),
|
951 |
|
|
#ifndef OLDFORMAT
|
952 |
|
|
0, /* Optional_prefix_size. */
|
953 |
|
|
#else
|
954 |
|
|
sizeof (struct nlm32_powerpc_external_prefix_header),
|
955 |
|
|
#endif
|
956 |
|
|
bfd_arch_powerpc,
|
957 |
|
|
0,
|
958 |
|
|
FALSE,
|
959 |
|
|
#ifndef OLDFORMAT
|
960 |
|
|
0, /* Backend_object_p. */
|
961 |
|
|
0, /* Write_prefix. */
|
962 |
|
|
#else
|
963 |
|
|
nlm_powerpc_backend_object_p,
|
964 |
|
|
nlm_powerpc_write_prefix,
|
965 |
|
|
#endif
|
966 |
|
|
nlm_powerpc_read_reloc,
|
967 |
|
|
nlm_powerpc_mangle_relocs,
|
968 |
|
|
nlm_powerpc_read_import,
|
969 |
|
|
nlm_powerpc_write_import,
|
970 |
|
|
#ifndef OLDFORMAT
|
971 |
|
|
nlm_powerpc_set_public_section,
|
972 |
|
|
nlm_powerpc_get_public_offset,
|
973 |
|
|
#else
|
974 |
|
|
0, /* Set_public_section. */
|
975 |
|
|
0, /* Get_public_offset. */
|
976 |
|
|
#endif
|
977 |
|
|
nlm_swap_fixed_header_in,
|
978 |
|
|
nlm_swap_fixed_header_out,
|
979 |
|
|
nlm_powerpc_write_external,
|
980 |
|
|
0, /* Write_export. */
|
981 |
|
|
};
|
982 |
|
|
|
983 |
|
|
#define TARGET_BIG_NAME "nlm32-powerpc"
|
984 |
|
|
#define TARGET_BIG_SYM nlmNAME (powerpc_vec)
|
985 |
|
|
#define TARGET_BACKEND_DATA & nlm32_powerpc_backend
|
986 |
|
|
|
987 |
|
|
#include "nlm-target.h"
|