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jeremybenn |
/* BFD back-end for HP/UX core files.
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Copyright 1993, 1994, 1996, 1998, 1999, 2001, 2002, 2003, 2004, 2006,
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2007 Free Software Foundation, Inc.
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Written by Stu Grossman, Cygnus Support.
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Converted to back-end form 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 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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/* This file can only be compiled on systems which use HP/UX style
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core files. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#if defined (HOST_HPPAHPUX) || defined (HOST_HP300HPUX) || defined (HOST_HPPAMPEIX)
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/* FIXME: sys/core.h doesn't exist for HPUX version 7. HPUX version
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5, 6, and 7 core files seem to be standard trad-core.c type core
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files; can we just use trad-core.c in addition to this file? */
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#include <sys/core.h>
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#include <sys/utsname.h>
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#endif /* HOST_HPPAHPUX */
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#ifdef HOST_HPPABSD
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/* Not a very swift place to put it, but that's where the BSD port
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puts them. */
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#include "/hpux/usr/include/sys/core.h"
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49 |
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#endif /* HOST_HPPABSD */
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50 |
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51 |
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#include <sys/param.h>
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#ifdef HAVE_DIRENT_H
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53 |
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# include <dirent.h>
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54 |
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#else
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55 |
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# ifdef HAVE_SYS_NDIR_H
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56 |
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# include <sys/ndir.h>
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57 |
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# endif
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58 |
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# ifdef HAVE_SYS_DIR_H
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59 |
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# include <sys/dir.h>
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# endif
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61 |
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# ifdef HAVE_NDIR_H
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# include <ndir.h>
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# endif
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#endif
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65 |
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#include <signal.h>
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#ifdef HPUX_CORE
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#include <machine/reg.h>
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#endif
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69 |
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#include <sys/user.h> /* After a.out.h */
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70 |
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#include <sys/file.h>
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71 |
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72 |
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/* Kludge: There's no explicit mechanism provided by sys/core.h to
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conditionally know whether a proc_info has thread id fields.
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74 |
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However, CORE_ANON_SHMEM shows up first at 10.30, which is
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happily also when meaningful thread id's show up in proc_info. */
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#if defined(CORE_ANON_SHMEM)
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#define PROC_INFO_HAS_THREAD_ID (1)
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#endif
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/* This type appears at HP-UX 10.30. Defining it if not defined
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by sys/core.h allows us to build for older HP-UX's, and (since
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it won't be encountered in core-dumps from older HP-UX's) is
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harmless. */
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84 |
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#if !defined(CORE_ANON_SHMEM)
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#define CORE_ANON_SHMEM 0x00000200 /* anonymous shared memory */
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86 |
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#endif
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87 |
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88 |
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/* These are stored in the bfd's tdata */
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89 |
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/* .lwpid and .user_tid are only valid if PROC_INFO_HAS_THREAD_ID, else they
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are set to 0. Also, until HP-UX implements MxN threads, .user_tid and
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92 |
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.lwpid are synonymous. */
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93 |
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struct hpux_core_struct
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94 |
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{
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95 |
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int sig;
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96 |
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int lwpid; /* Kernel thread ID. */
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97 |
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unsigned long user_tid; /* User thread ID. */
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98 |
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char cmd[MAXCOMLEN + 1];
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99 |
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};
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100 |
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101 |
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#define core_hdr(bfd) ((bfd)->tdata.hpux_core_data)
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#define core_signal(bfd) (core_hdr(bfd)->sig)
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#define core_command(bfd) (core_hdr(bfd)->cmd)
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104 |
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#define core_kernel_thread_id(bfd) (core_hdr(bfd)->lwpid)
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#define core_user_thread_id(bfd) (core_hdr(bfd)->user_tid)
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106 |
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#define hpux_core_core_file_matches_executable_p generic_core_file_matches_executable_p
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107 |
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static asection *make_bfd_asection (bfd *, const char *, flagword,
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109 |
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bfd_size_type, bfd_vma, unsigned int);
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110 |
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static const bfd_target *hpux_core_core_file_p (bfd *);
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static char *hpux_core_core_file_failing_command (bfd *);
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112 |
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static int hpux_core_core_file_failing_signal (bfd *);
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113 |
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static void swap_abort (void);
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static asection *
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make_bfd_asection (bfd *abfd, const char *name, flagword flags,
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bfd_size_type size, bfd_vma vma,
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118 |
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unsigned int alignment_power)
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{
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120 |
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asection *asect;
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char *newname;
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newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1);
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if (!newname)
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return NULL;
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126 |
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127 |
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strcpy (newname, name);
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128 |
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129 |
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asect = bfd_make_section_anyway_with_flags (abfd, newname, flags);
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130 |
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if (!asect)
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return NULL;
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132 |
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133 |
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asect->size = size;
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asect->vma = vma;
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asect->filepos = bfd_tell (abfd);
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asect->alignment_power = alignment_power;
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137 |
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138 |
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return asect;
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139 |
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}
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140 |
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141 |
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/* Return true if the given core file section corresponds to a thread,
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142 |
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based on its name. */
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143 |
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144 |
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static int
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145 |
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thread_section_p (bfd *abfd ATTRIBUTE_UNUSED,
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146 |
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asection *sect,
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147 |
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void *obj ATTRIBUTE_UNUSED)
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148 |
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{
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149 |
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return CONST_STRNEQ (sect->name, ".reg/");
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150 |
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}
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151 |
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/* this function builds a bfd target if the file is a corefile.
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153 |
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It returns null or 0 if it finds out thaat it is not a core file.
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154 |
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The way it checks this is by looking for allowed 'type' field values.
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These are declared in sys/core.h
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156 |
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There are some values which are 'reserved for future use'. In particular
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CORE_NONE is actually defined as 0. This may be a catch-all for cases
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in which the core file is generated by some non-hpux application.
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(I am just guessing here!)
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*/
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static const bfd_target *
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hpux_core_core_file_p (bfd *abfd)
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{
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164 |
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int good_sections = 0;
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165 |
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int unknown_sections = 0;
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166 |
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core_hdr (abfd) = (struct hpux_core_struct *)
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bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct));
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if (!core_hdr (abfd))
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return NULL;
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172 |
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while (1)
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173 |
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{
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174 |
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int val;
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struct corehead core_header;
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val = bfd_bread ((void *) &core_header,
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(bfd_size_type) sizeof core_header, abfd);
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if (val <= 0)
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break;
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181 |
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switch (core_header.type)
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{
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183 |
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case CORE_KERNEL:
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case CORE_FORMAT:
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185 |
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/* Just skip this. */
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186 |
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bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
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187 |
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good_sections++;
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188 |
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break;
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189 |
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case CORE_EXEC:
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190 |
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{
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191 |
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struct proc_exec proc_exec;
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192 |
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if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len,
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193 |
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abfd) != core_header.len)
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194 |
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break;
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195 |
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strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1);
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196 |
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good_sections++;
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197 |
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}
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198 |
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break;
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199 |
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case CORE_PROC:
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200 |
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{
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201 |
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struct proc_info proc_info;
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202 |
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char secname[100]; /* Of arbitrary size, but plenty large. */
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203 |
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|
204 |
|
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/* We need to read this section, 'cause we need to determine
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205 |
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whether the core-dumped app was threaded before we create
|
206 |
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any .reg sections. */
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207 |
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if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd)
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208 |
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!= core_header.len)
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209 |
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break;
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210 |
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|
211 |
|
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/* However, we also want to create those sections with the
|
212 |
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file positioned at the start of the record, it seems. */
|
213 |
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if (bfd_seek (abfd, -((file_ptr) core_header.len), SEEK_CUR) != 0)
|
214 |
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break;
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215 |
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|
216 |
|
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#if defined(PROC_INFO_HAS_THREAD_ID)
|
217 |
|
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core_kernel_thread_id (abfd) = proc_info.lwpid;
|
218 |
|
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core_user_thread_id (abfd) = proc_info.user_tid;
|
219 |
|
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#else
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220 |
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core_kernel_thread_id (abfd) = 0;
|
221 |
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core_user_thread_id (abfd) = 0;
|
222 |
|
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#endif
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223 |
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/* If the program was unthreaded, then we'll just create a
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224 |
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.reg section.
|
225 |
|
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|
226 |
|
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If the program was threaded, then we'll create .reg/XXXXX
|
227 |
|
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section for each thread, where XXXXX is a printable
|
228 |
|
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representation of the kernel thread id. We'll also
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229 |
|
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create a .reg section for the thread that was running
|
230 |
|
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and signalled at the time of the core-dump (i.e., this
|
231 |
|
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is effectively an alias, needed to keep GDB happy.)
|
232 |
|
|
|
233 |
|
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Note that we use `.reg/XXXXX' as opposed to '.regXXXXX'
|
234 |
|
|
because GDB expects that .reg2 will be the floating-
|
235 |
|
|
point registers. */
|
236 |
|
|
if (core_kernel_thread_id (abfd) == 0)
|
237 |
|
|
{
|
238 |
|
|
if (!make_bfd_asection (abfd, ".reg",
|
239 |
|
|
SEC_HAS_CONTENTS,
|
240 |
|
|
core_header.len,
|
241 |
|
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(bfd_vma) offsetof (struct proc_info,
|
242 |
|
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hw_regs),
|
243 |
|
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2))
|
244 |
|
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goto fail;
|
245 |
|
|
}
|
246 |
|
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else
|
247 |
|
|
{
|
248 |
|
|
/* There are threads. Is this the one that caused the
|
249 |
|
|
core-dump? We'll claim it was the running thread. */
|
250 |
|
|
if (proc_info.sig != -1)
|
251 |
|
|
{
|
252 |
|
|
if (!make_bfd_asection (abfd, ".reg",
|
253 |
|
|
SEC_HAS_CONTENTS,
|
254 |
|
|
core_header.len,
|
255 |
|
|
(bfd_vma)offsetof (struct proc_info,
|
256 |
|
|
hw_regs),
|
257 |
|
|
2))
|
258 |
|
|
goto fail;
|
259 |
|
|
}
|
260 |
|
|
/* We always make one of these sections, for every thread. */
|
261 |
|
|
sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd));
|
262 |
|
|
if (!make_bfd_asection (abfd, secname,
|
263 |
|
|
SEC_HAS_CONTENTS,
|
264 |
|
|
core_header.len,
|
265 |
|
|
(bfd_vma) offsetof (struct proc_info,
|
266 |
|
|
hw_regs),
|
267 |
|
|
2))
|
268 |
|
|
goto fail;
|
269 |
|
|
}
|
270 |
|
|
core_signal (abfd) = proc_info.sig;
|
271 |
|
|
if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0)
|
272 |
|
|
break;
|
273 |
|
|
good_sections++;
|
274 |
|
|
}
|
275 |
|
|
break;
|
276 |
|
|
|
277 |
|
|
case CORE_DATA:
|
278 |
|
|
case CORE_STACK:
|
279 |
|
|
case CORE_TEXT:
|
280 |
|
|
case CORE_MMF:
|
281 |
|
|
case CORE_SHM:
|
282 |
|
|
case CORE_ANON_SHMEM:
|
283 |
|
|
if (!make_bfd_asection (abfd, ".data",
|
284 |
|
|
SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
|
285 |
|
|
core_header.len,
|
286 |
|
|
(bfd_vma) core_header.addr, 2))
|
287 |
|
|
goto fail;
|
288 |
|
|
|
289 |
|
|
bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
|
290 |
|
|
good_sections++;
|
291 |
|
|
break;
|
292 |
|
|
|
293 |
|
|
case CORE_NONE:
|
294 |
|
|
/* Let's not punt if we encounter a section of unknown
|
295 |
|
|
type. Rather, let's make a note of it. If we later
|
296 |
|
|
see that there were also "good" sections, then we'll
|
297 |
|
|
declare that this a core file, but we'll also warn that
|
298 |
|
|
it may be incompatible with this gdb.
|
299 |
|
|
*/
|
300 |
|
|
unknown_sections++;
|
301 |
|
|
break;
|
302 |
|
|
|
303 |
|
|
default:
|
304 |
|
|
goto fail; /*unrecognized core file type */
|
305 |
|
|
}
|
306 |
|
|
}
|
307 |
|
|
|
308 |
|
|
/* OK, we believe you. You're a core file (sure, sure). */
|
309 |
|
|
|
310 |
|
|
/* On HP/UX, we sometimes encounter core files where none of the threads
|
311 |
|
|
was found to be the running thread (ie the signal was set to -1 for
|
312 |
|
|
all threads). This happens when the program was aborted externally
|
313 |
|
|
via a TT_CORE ttrace system call. In that case, we just pick one
|
314 |
|
|
thread at random to be the active thread. */
|
315 |
|
|
if (core_kernel_thread_id (abfd) != 0
|
316 |
|
|
&& bfd_get_section_by_name (abfd, ".reg") == NULL)
|
317 |
|
|
{
|
318 |
|
|
asection *asect = bfd_sections_find_if (abfd, thread_section_p, NULL);
|
319 |
|
|
asection *reg_sect;
|
320 |
|
|
|
321 |
|
|
if (asect != NULL)
|
322 |
|
|
{
|
323 |
|
|
reg_sect = make_bfd_asection (abfd, ".reg", asect->flags,
|
324 |
|
|
asect->size, asect->vma,
|
325 |
|
|
asect->alignment_power);
|
326 |
|
|
if (reg_sect == NULL)
|
327 |
|
|
goto fail;
|
328 |
|
|
|
329 |
|
|
reg_sect->filepos = asect->filepos;
|
330 |
|
|
}
|
331 |
|
|
}
|
332 |
|
|
|
333 |
|
|
/* Were there sections of unknown type? If so, yet there were
|
334 |
|
|
at least some complete sections of known type, then, issue
|
335 |
|
|
a warning. Possibly the core file was generated on a version
|
336 |
|
|
of HP-UX that is incompatible with that for which this gdb was
|
337 |
|
|
built.
|
338 |
|
|
*/
|
339 |
|
|
if ((unknown_sections > 0) && (good_sections > 0))
|
340 |
|
|
(*_bfd_error_handler)
|
341 |
|
|
("%s appears to be a core file,\nbut contains unknown sections. It may have been created on an incompatible\nversion of HP-UX. As a result, some information may be unavailable.\n",
|
342 |
|
|
abfd->filename);
|
343 |
|
|
|
344 |
|
|
return abfd->xvec;
|
345 |
|
|
|
346 |
|
|
fail:
|
347 |
|
|
bfd_release (abfd, core_hdr (abfd));
|
348 |
|
|
core_hdr (abfd) = NULL;
|
349 |
|
|
bfd_section_list_clear (abfd);
|
350 |
|
|
return NULL;
|
351 |
|
|
}
|
352 |
|
|
|
353 |
|
|
static char *
|
354 |
|
|
hpux_core_core_file_failing_command (bfd *abfd)
|
355 |
|
|
{
|
356 |
|
|
return core_command (abfd);
|
357 |
|
|
}
|
358 |
|
|
|
359 |
|
|
static int
|
360 |
|
|
hpux_core_core_file_failing_signal (bfd *abfd)
|
361 |
|
|
{
|
362 |
|
|
return core_signal (abfd);
|
363 |
|
|
}
|
364 |
|
|
|
365 |
|
|
|
366 |
|
|
/* If somebody calls any byte-swapping routines, shoot them. */
|
367 |
|
|
static void
|
368 |
|
|
swap_abort (void)
|
369 |
|
|
{
|
370 |
|
|
abort(); /* This way doesn't require any declaration for ANSI to fuck up */
|
371 |
|
|
}
|
372 |
|
|
|
373 |
|
|
#define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
|
374 |
|
|
#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
|
375 |
|
|
#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
|
376 |
|
|
#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
|
377 |
|
|
#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
|
378 |
|
|
#define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
|
379 |
|
|
|
380 |
|
|
const bfd_target hpux_core_vec =
|
381 |
|
|
{
|
382 |
|
|
"hpux-core",
|
383 |
|
|
bfd_target_unknown_flavour,
|
384 |
|
|
BFD_ENDIAN_BIG, /* target byte order */
|
385 |
|
|
BFD_ENDIAN_BIG, /* target headers byte order */
|
386 |
|
|
(HAS_RELOC | EXEC_P | /* object flags */
|
387 |
|
|
HAS_LINENO | HAS_DEBUG |
|
388 |
|
|
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
|
389 |
|
|
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
|
390 |
|
|
0, /* symbol prefix */
|
391 |
|
|
' ', /* ar_pad_char */
|
392 |
|
|
16, /* ar_max_namelen */
|
393 |
|
|
NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
|
394 |
|
|
NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
|
395 |
|
|
NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
|
396 |
|
|
NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
|
397 |
|
|
NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
|
398 |
|
|
NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
|
399 |
|
|
|
400 |
|
|
{ /* bfd_check_format */
|
401 |
|
|
_bfd_dummy_target, /* unknown format */
|
402 |
|
|
_bfd_dummy_target, /* object file */
|
403 |
|
|
_bfd_dummy_target, /* archive */
|
404 |
|
|
hpux_core_core_file_p /* a core file */
|
405 |
|
|
},
|
406 |
|
|
{ /* bfd_set_format */
|
407 |
|
|
bfd_false, bfd_false,
|
408 |
|
|
bfd_false, bfd_false
|
409 |
|
|
},
|
410 |
|
|
{ /* bfd_write_contents */
|
411 |
|
|
bfd_false, bfd_false,
|
412 |
|
|
bfd_false, bfd_false
|
413 |
|
|
},
|
414 |
|
|
|
415 |
|
|
BFD_JUMP_TABLE_GENERIC (_bfd_generic),
|
416 |
|
|
BFD_JUMP_TABLE_COPY (_bfd_generic),
|
417 |
|
|
BFD_JUMP_TABLE_CORE (hpux_core),
|
418 |
|
|
BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
|
419 |
|
|
BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
|
420 |
|
|
BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
|
421 |
|
|
BFD_JUMP_TABLE_WRITE (_bfd_generic),
|
422 |
|
|
BFD_JUMP_TABLE_LINK (_bfd_nolink),
|
423 |
|
|
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
424 |
|
|
|
425 |
|
|
NULL,
|
426 |
|
|
|
427 |
|
|
(PTR) 0 /* backend_data */
|
428 |
|
|
};
|