540 lines
16 KiB
C
540 lines
16 KiB
C
/* BFD back-end for PPCbug boot records.
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
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Free Software Foundation, Inc.
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Written by Michael Meissner, Cygnus Support, <meissner@cygnus.com>
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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 is a BFD backend which may be used to write PowerPCBug boot objects.
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It may only be used for output, not input. The intention is that this may
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be used as an output format for objcopy in order to generate raw binary
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data.
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This is very simple. The only complication is that the real data
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will start at some address X, and in some cases we will not want to
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include X zeroes just to get to that point. Since the start
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address is not meaningful for this object file format, we use it
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instead to indicate the number of zeroes to skip at the start of
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the file. objcopy cooperates by specially setting the start
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address to zero by default. */
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#include "safe-ctype.h"
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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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/* PPCbug location structure */
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typedef struct ppcboot_location {
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bfd_byte ind;
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bfd_byte head;
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bfd_byte sector;
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bfd_byte cylinder;
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} ppcboot_location_t;
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/* PPCbug partition table layout */
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typedef struct ppcboot_partition {
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ppcboot_location_t partition_begin; /* partition begin */
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ppcboot_location_t partition_end; /* partition end */
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bfd_byte sector_begin[4]; /* 32-bit start RBA (zero-based), little endian */
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bfd_byte sector_length[4]; /* 32-bit RBA count (one-based), little endian */
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} ppcboot_partition_t;
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/* PPCbug boot layout. */
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typedef struct ppcboot_hdr {
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bfd_byte pc_compatibility[446]; /* x86 instruction field */
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ppcboot_partition_t partition[4]; /* partition information */
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bfd_byte signature[2]; /* 0x55 and 0xaa */
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bfd_byte entry_offset[4]; /* entry point offset, little endian */
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bfd_byte length[4]; /* load image length, little endian */
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bfd_byte flags; /* flag field */
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bfd_byte os_id; /* OS_ID */
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char partition_name[32]; /* partition name */
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bfd_byte reserved1[470]; /* reserved */
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}
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#ifdef __GNUC__
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__attribute__ ((packed))
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#endif
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ppcboot_hdr_t;
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/* Signature bytes for last 2 bytes of the 512 byte record */
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#define SIGNATURE0 0x55
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#define SIGNATURE1 0xaa
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/* PowerPC boot type */
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#define PPC_IND 0x41
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/* Information needed for ppcboot header */
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typedef struct ppcboot_data {
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ppcboot_hdr_t header; /* raw header */
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asection *sec; /* single section */
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} ppcboot_data_t;
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/* Any bfd we create by reading a ppcboot file has three symbols:
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a start symbol, an end symbol, and an absolute length symbol. */
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#define PPCBOOT_SYMS 3
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static bfd_boolean ppcboot_mkobject PARAMS ((bfd *));
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static const bfd_target *ppcboot_object_p PARAMS ((bfd *));
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static bfd_boolean ppcboot_set_arch_mach
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PARAMS ((bfd *, enum bfd_architecture, unsigned long));
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static bfd_boolean ppcboot_get_section_contents
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PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
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static long ppcboot_get_symtab_upper_bound PARAMS ((bfd *));
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static char *mangle_name PARAMS ((bfd *, char *));
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static long ppcboot_canonicalize_symtab PARAMS ((bfd *, asymbol **));
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static void ppcboot_get_symbol_info PARAMS ((bfd *, asymbol *, symbol_info *));
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static bfd_boolean ppcboot_set_section_contents
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PARAMS ((bfd *, asection *, const PTR, file_ptr, bfd_size_type));
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static int ppcboot_sizeof_headers PARAMS ((bfd *, bfd_boolean));
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static bfd_boolean ppcboot_bfd_print_private_bfd_data PARAMS ((bfd *, PTR));
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#define ppcboot_set_tdata(abfd, ptr) ((abfd)->tdata.any = (PTR) (ptr))
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#define ppcboot_get_tdata(abfd) ((ppcboot_data_t *) ((abfd)->tdata.any))
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/* Create a ppcboot object. Invoked via bfd_set_format. */
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static bfd_boolean
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ppcboot_mkobject (abfd)
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bfd *abfd;
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{
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if (!ppcboot_get_tdata (abfd))
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{
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bfd_size_type amt = sizeof (ppcboot_data_t);
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ppcboot_set_tdata (abfd, bfd_zalloc (abfd, amt));
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}
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return TRUE;
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}
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/* Set the architecture to PowerPC */
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static bfd_boolean
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ppcboot_set_arch_mach (abfd, arch, machine)
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bfd *abfd;
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enum bfd_architecture arch;
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unsigned long machine;
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{
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if (arch == bfd_arch_unknown)
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arch = bfd_arch_powerpc;
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else if (arch != bfd_arch_powerpc)
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return FALSE;
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return bfd_default_set_arch_mach (abfd, arch, machine);
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}
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/* Any file may be considered to be a ppcboot file, provided the target
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was not defaulted. That is, it must be explicitly specified as
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being ppcboot. */
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static const bfd_target *
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ppcboot_object_p (abfd)
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bfd *abfd;
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{
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struct stat statbuf;
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asection *sec;
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ppcboot_hdr_t hdr;
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size_t i;
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ppcboot_data_t *tdata;
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BFD_ASSERT (sizeof (ppcboot_hdr_t) == 1024);
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if (abfd->target_defaulted)
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{
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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/* Find the file size. */
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if (bfd_stat (abfd, &statbuf) < 0)
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{
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bfd_set_error (bfd_error_system_call);
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return NULL;
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}
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if ((size_t) statbuf.st_size < sizeof (ppcboot_hdr_t))
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{
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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if (bfd_bread ((PTR) &hdr, (bfd_size_type) sizeof (hdr), abfd)
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!= sizeof (hdr))
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{
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if (bfd_get_error () != bfd_error_system_call)
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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/* Now do some basic checks. */
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for (i = 0; i < sizeof (hdr.pc_compatibility); i++)
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if (hdr.pc_compatibility[i])
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{
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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if (hdr.signature[0] != SIGNATURE0 || hdr.signature[1] != SIGNATURE1)
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{
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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if (hdr.partition[0].partition_end.ind != PPC_IND)
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{
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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abfd->symcount = PPCBOOT_SYMS;
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/* One data section. */
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sec = bfd_make_section (abfd, ".data");
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if (sec == NULL)
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return NULL;
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sec->flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_CODE | SEC_HAS_CONTENTS;
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sec->vma = 0;
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sec->_raw_size = statbuf.st_size - sizeof (ppcboot_hdr_t);
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sec->filepos = sizeof (ppcboot_hdr_t);
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ppcboot_mkobject (abfd);
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tdata = ppcboot_get_tdata (abfd);
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tdata->sec = sec;
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memcpy ((PTR) &tdata->header, (PTR) &hdr, sizeof (ppcboot_hdr_t));
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ppcboot_set_arch_mach (abfd, bfd_arch_powerpc, 0L);
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return abfd->xvec;
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}
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#define ppcboot_close_and_cleanup _bfd_generic_close_and_cleanup
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#define ppcboot_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
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#define ppcboot_new_section_hook _bfd_generic_new_section_hook
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/* Get contents of the only section. */
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static bfd_boolean
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ppcboot_get_section_contents (abfd, section, location, offset, count)
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bfd *abfd;
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asection *section ATTRIBUTE_UNUSED;
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PTR location;
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file_ptr offset;
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bfd_size_type count;
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{
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if (bfd_seek (abfd, offset + (file_ptr) sizeof (ppcboot_hdr_t), SEEK_SET) != 0
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|| bfd_bread (location, count, abfd) != count)
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return FALSE;
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return TRUE;
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}
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/* Return the amount of memory needed to read the symbol table. */
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static long
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ppcboot_get_symtab_upper_bound (abfd)
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bfd *abfd ATTRIBUTE_UNUSED;
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{
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return (PPCBOOT_SYMS + 1) * sizeof (asymbol *);
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}
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/* Create a symbol name based on the bfd's filename. */
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static char *
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mangle_name (abfd, suffix)
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bfd *abfd;
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char *suffix;
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{
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bfd_size_type size;
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char *buf;
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char *p;
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size = (strlen (bfd_get_filename (abfd))
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+ strlen (suffix)
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+ sizeof "_ppcboot__");
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buf = (char *) bfd_alloc (abfd, size);
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if (buf == NULL)
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return "";
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sprintf (buf, "_ppcboot_%s_%s", bfd_get_filename (abfd), suffix);
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/* Change any non-alphanumeric characters to underscores. */
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for (p = buf; *p; p++)
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if (! ISALNUM (*p))
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*p = '_';
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return buf;
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}
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/* Return the symbol table. */
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static long
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ppcboot_canonicalize_symtab (abfd, alocation)
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bfd *abfd;
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asymbol **alocation;
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{
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asection *sec = ppcboot_get_tdata (abfd)->sec;
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asymbol *syms;
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unsigned int i;
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bfd_size_type amt = PPCBOOT_SYMS * sizeof (asymbol);
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syms = (asymbol *) bfd_alloc (abfd, amt);
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if (syms == NULL)
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return FALSE;
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/* Start symbol. */
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syms[0].the_bfd = abfd;
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syms[0].name = mangle_name (abfd, "start");
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syms[0].value = 0;
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syms[0].flags = BSF_GLOBAL;
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syms[0].section = sec;
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syms[0].udata.p = NULL;
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/* End symbol. */
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syms[1].the_bfd = abfd;
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syms[1].name = mangle_name (abfd, "end");
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syms[1].value = sec->_raw_size;
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syms[1].flags = BSF_GLOBAL;
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syms[1].section = sec;
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syms[1].udata.p = NULL;
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/* Size symbol. */
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syms[2].the_bfd = abfd;
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syms[2].name = mangle_name (abfd, "size");
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syms[2].value = sec->_raw_size;
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syms[2].flags = BSF_GLOBAL;
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syms[2].section = bfd_abs_section_ptr;
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syms[2].udata.p = NULL;
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for (i = 0; i < PPCBOOT_SYMS; i++)
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*alocation++ = syms++;
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*alocation = NULL;
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return PPCBOOT_SYMS;
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}
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#define ppcboot_make_empty_symbol _bfd_generic_make_empty_symbol
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#define ppcboot_print_symbol _bfd_nosymbols_print_symbol
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/* Get information about a symbol. */
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static void
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ppcboot_get_symbol_info (ignore_abfd, symbol, ret)
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bfd *ignore_abfd ATTRIBUTE_UNUSED;
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asymbol *symbol;
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symbol_info *ret;
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{
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bfd_symbol_info (symbol, ret);
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}
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#define ppcboot_bfd_is_local_label_name bfd_generic_is_local_label_name
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#define ppcboot_get_lineno _bfd_nosymbols_get_lineno
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#define ppcboot_find_nearest_line _bfd_nosymbols_find_nearest_line
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#define ppcboot_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
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#define ppcboot_read_minisymbols _bfd_generic_read_minisymbols
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#define ppcboot_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
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#define ppcboot_get_reloc_upper_bound \
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((long (*) PARAMS ((bfd *, asection *))) bfd_0l)
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#define ppcboot_canonicalize_reloc \
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((long (*) PARAMS ((bfd *, asection *, arelent **, asymbol **))) bfd_0l)
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#define ppcboot_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
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/* Write section contents of a ppcboot file. */
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static bfd_boolean
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ppcboot_set_section_contents (abfd, sec, data, offset, size)
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bfd *abfd;
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asection *sec;
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const PTR data;
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file_ptr offset;
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bfd_size_type size;
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{
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if (! abfd->output_has_begun)
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{
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bfd_vma low;
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asection *s;
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/* The lowest section VMA sets the virtual address of the start
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of the file. We use the set the file position of all the
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sections. */
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low = abfd->sections->vma;
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for (s = abfd->sections->next; s != NULL; s = s->next)
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if (s->vma < low)
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low = s->vma;
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for (s = abfd->sections; s != NULL; s = s->next)
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s->filepos = s->vma - low;
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abfd->output_has_begun = TRUE;
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}
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return _bfd_generic_set_section_contents (abfd, sec, data, offset, size);
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}
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static int
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ppcboot_sizeof_headers (abfd, exec)
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bfd *abfd ATTRIBUTE_UNUSED;
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bfd_boolean exec ATTRIBUTE_UNUSED;
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{
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return sizeof (ppcboot_hdr_t);
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}
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/* Print out the program headers. */
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static bfd_boolean
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ppcboot_bfd_print_private_bfd_data (abfd, farg)
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bfd *abfd;
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PTR farg;
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{
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FILE *f = (FILE *)farg;
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ppcboot_data_t *tdata = ppcboot_get_tdata (abfd);
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long entry_offset = bfd_getl_signed_32 ((PTR) tdata->header.entry_offset);
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long length = bfd_getl_signed_32 ((PTR) tdata->header.length);
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int i;
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fprintf (f, _("\nppcboot header:\n"));
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fprintf (f, _("Entry offset = 0x%.8lx (%ld)\n"), entry_offset, entry_offset);
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fprintf (f, _("Length = 0x%.8lx (%ld)\n"), length, length);
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if (tdata->header.flags)
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fprintf (f, _("Flag field = 0x%.2x\n"), tdata->header.flags);
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if (tdata->header.os_id)
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fprintf (f, "OS_ID = 0x%.2x\n", tdata->header.os_id);
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if (tdata->header.partition_name)
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fprintf (f, _("Partition name = \"%s\"\n"), tdata->header.partition_name);
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for (i = 0; i < 4; i++)
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{
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long sector_begin = bfd_getl_signed_32 ((PTR) tdata->header.partition[i].sector_begin);
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long sector_length = bfd_getl_signed_32 ((PTR) tdata->header.partition[i].sector_length);
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/* Skip all 0 entries */
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if (!tdata->header.partition[i].partition_begin.ind
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&& !tdata->header.partition[i].partition_begin.head
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&& !tdata->header.partition[i].partition_begin.sector
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&& !tdata->header.partition[i].partition_begin.cylinder
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&& !tdata->header.partition[i].partition_end.ind
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&& !tdata->header.partition[i].partition_end.head
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&& !tdata->header.partition[i].partition_end.sector
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&& !tdata->header.partition[i].partition_end.cylinder
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&& !sector_begin && !sector_length)
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continue;
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fprintf (f, _("\nPartition[%d] start = { 0x%.2x, 0x%.2x, 0x%.2x, 0x%.2x }\n"), i,
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tdata->header.partition[i].partition_begin.ind,
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tdata->header.partition[i].partition_begin.head,
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tdata->header.partition[i].partition_begin.sector,
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tdata->header.partition[i].partition_begin.cylinder);
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fprintf (f, _("Partition[%d] end = { 0x%.2x, 0x%.2x, 0x%.2x, 0x%.2x }\n"), i,
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tdata->header.partition[i].partition_end.ind,
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tdata->header.partition[i].partition_end.head,
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tdata->header.partition[i].partition_end.sector,
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tdata->header.partition[i].partition_end.cylinder);
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fprintf (f, _("Partition[%d] sector = 0x%.8lx (%ld)\n"), i, sector_begin, sector_begin);
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fprintf (f, _("Partition[%d] length = 0x%.8lx (%ld)\n"), i, sector_length, sector_length);
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}
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fprintf (f, "\n");
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return TRUE;
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}
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#define ppcboot_bfd_get_relocated_section_contents \
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bfd_generic_get_relocated_section_contents
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#define ppcboot_bfd_relax_section bfd_generic_relax_section
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#define ppcboot_bfd_gc_sections bfd_generic_gc_sections
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#define ppcboot_bfd_merge_sections bfd_generic_merge_sections
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#define ppcboot_bfd_discard_group bfd_generic_discard_group
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#define ppcboot_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
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#define ppcboot_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
|
||
#define ppcboot_bfd_link_add_symbols _bfd_generic_link_add_symbols
|
||
#define ppcboot_bfd_link_just_syms _bfd_generic_link_just_syms
|
||
#define ppcboot_bfd_final_link _bfd_generic_final_link
|
||
#define ppcboot_bfd_link_split_section _bfd_generic_link_split_section
|
||
#define ppcboot_get_section_contents_in_window \
|
||
_bfd_generic_get_section_contents_in_window
|
||
|
||
#define ppcboot_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
|
||
#define ppcboot_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
|
||
#define ppcboot_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
|
||
#define ppcboot_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
|
||
#define ppcboot_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
|
||
#define ppcboot_bfd_print_private_bfd_dat ppcboot_bfd_print_private_bfd_data
|
||
|
||
const bfd_target ppcboot_vec =
|
||
{
|
||
"ppcboot", /* name */
|
||
bfd_target_unknown_flavour, /* flavour */
|
||
BFD_ENDIAN_BIG, /* byteorder is big endian for code */
|
||
BFD_ENDIAN_LITTLE, /* header_byteorder */
|
||
EXEC_P, /* object_flags */
|
||
(SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
|
||
| SEC_ROM | SEC_HAS_CONTENTS), /* section_flags */
|
||
0, /* symbol_leading_char */
|
||
' ', /* ar_pad_char */
|
||
16, /* ar_max_namelen */
|
||
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
|
||
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
|
||
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
|
||
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
||
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
||
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
|
||
{ /* bfd_check_format */
|
||
_bfd_dummy_target,
|
||
ppcboot_object_p, /* bfd_check_format */
|
||
_bfd_dummy_target,
|
||
_bfd_dummy_target,
|
||
},
|
||
{ /* bfd_set_format */
|
||
bfd_false,
|
||
ppcboot_mkobject,
|
||
bfd_false,
|
||
bfd_false,
|
||
},
|
||
{ /* bfd_write_contents */
|
||
bfd_false,
|
||
bfd_true,
|
||
bfd_false,
|
||
bfd_false,
|
||
},
|
||
|
||
BFD_JUMP_TABLE_GENERIC (ppcboot),
|
||
BFD_JUMP_TABLE_COPY (ppcboot),
|
||
BFD_JUMP_TABLE_CORE (_bfd_nocore),
|
||
BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
|
||
BFD_JUMP_TABLE_SYMBOLS (ppcboot),
|
||
BFD_JUMP_TABLE_RELOCS (ppcboot),
|
||
BFD_JUMP_TABLE_WRITE (ppcboot),
|
||
BFD_JUMP_TABLE_LINK (ppcboot),
|
||
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
||
|
||
NULL,
|
||
|
||
NULL
|
||
};
|