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binutils-gdb/bfd/hpux-core.c
Alan Modra 4b95cf5c0c Update copyright years
2014-03-05 22:16:15 +10:30

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/* BFD back-end for HP/UX core files.
Copyright (C) 1993-2014 Free Software Foundation, Inc.
Written by Stu Grossman, Cygnus Support.
Converted to back-end form by Ian Lance Taylor, Cygnus SUpport
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
/* This file can only be compiled on systems which use HP/UX style
core files. */
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#if defined (HOST_HPPAHPUX) || defined (HOST_HP300HPUX) || defined (HOST_HPPAMPEIX)
/* FIXME: sys/core.h doesn't exist for HPUX version 7. HPUX version
5, 6, and 7 core files seem to be standard trad-core.c type core
files; can we just use trad-core.c in addition to this file? */
#include <sys/core.h>
#include <sys/utsname.h>
#endif /* HOST_HPPAHPUX */
#ifdef HOST_HPPABSD
/* Not a very swift place to put it, but that's where the BSD port
puts them. */
#include "/hpux/usr/include/sys/core.h"
#endif /* HOST_HPPABSD */
#include <sys/param.h>
#ifdef HAVE_DIRENT_H
# include <dirent.h>
#else
# ifdef HAVE_SYS_NDIR_H
# include <sys/ndir.h>
# endif
# ifdef HAVE_SYS_DIR_H
# include <sys/dir.h>
# endif
# ifdef HAVE_NDIR_H
# include <ndir.h>
# endif
#endif
#include <signal.h>
#ifdef HPUX_CORE
#include <machine/reg.h>
#endif
#include <sys/file.h>
/* Kludge: There's no explicit mechanism provided by sys/core.h to
conditionally know whether a proc_info has thread id fields.
However, CORE_ANON_SHMEM shows up first at 10.30, which is
happily also when meaningful thread id's show up in proc_info. */
#if defined(CORE_ANON_SHMEM)
#define PROC_INFO_HAS_THREAD_ID (1)
#endif
/* This type appears at HP-UX 10.30. Defining it if not defined
by sys/core.h allows us to build for older HP-UX's, and (since
it won't be encountered in core-dumps from older HP-UX's) is
harmless. */
#if !defined(CORE_ANON_SHMEM)
#define CORE_ANON_SHMEM 0x00000200 /* anonymous shared memory */
#endif
/* These are stored in the bfd's tdata */
/* .lwpid and .user_tid are only valid if PROC_INFO_HAS_THREAD_ID, else they
are set to 0. Also, until HP-UX implements MxN threads, .user_tid and
.lwpid are synonymous. */
struct hpux_core_struct
{
int sig;
int lwpid; /* Kernel thread ID. */
unsigned long user_tid; /* User thread ID. */
char cmd[MAXCOMLEN + 1];
};
#define core_hdr(bfd) ((bfd)->tdata.hpux_core_data)
#define core_signal(bfd) (core_hdr(bfd)->sig)
#define core_command(bfd) (core_hdr(bfd)->cmd)
#define core_kernel_thread_id(bfd) (core_hdr(bfd)->lwpid)
#define core_user_thread_id(bfd) (core_hdr(bfd)->user_tid)
#define hpux_core_core_file_matches_executable_p generic_core_file_matches_executable_p
#define hpux_core_core_file_pid _bfd_nocore_core_file_pid
static asection *make_bfd_asection (bfd *, const char *, flagword,
bfd_size_type, bfd_vma, unsigned int);
static const bfd_target *hpux_core_core_file_p (bfd *);
static char *hpux_core_core_file_failing_command (bfd *);
static int hpux_core_core_file_failing_signal (bfd *);
static void swap_abort (void);
static asection *
make_bfd_asection (bfd *abfd, const char *name, flagword flags,
bfd_size_type size, bfd_vma vma,
unsigned int alignment_power)
{
asection *asect;
char *newname;
newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1);
if (!newname)
return NULL;
strcpy (newname, name);
asect = bfd_make_section_anyway_with_flags (abfd, newname, flags);
if (!asect)
return NULL;
asect->size = size;
asect->vma = vma;
asect->filepos = bfd_tell (abfd);
asect->alignment_power = alignment_power;
return asect;
}
/* Return true if the given core file section corresponds to a thread,
based on its name. */
static int
thread_section_p (bfd *abfd ATTRIBUTE_UNUSED,
asection *sect,
void *obj ATTRIBUTE_UNUSED)
{
return CONST_STRNEQ (sect->name, ".reg/");
}
/* this function builds a bfd target if the file is a corefile.
It returns null or 0 if it finds out thaat it is not a core file.
The way it checks this is by looking for allowed 'type' field values.
These are declared in sys/core.h
There are some values which are 'reserved for future use'. In particular
CORE_NONE is actually defined as 0. This may be a catch-all for cases
in which the core file is generated by some non-hpux application.
(I am just guessing here!)
*/
static const bfd_target *
hpux_core_core_file_p (bfd *abfd)
{
int good_sections = 0;
int unknown_sections = 0;
core_hdr (abfd) = (struct hpux_core_struct *)
bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct));
if (!core_hdr (abfd))
return NULL;
while (1)
{
int val;
struct corehead core_header;
val = bfd_bread ((void *) &core_header,
(bfd_size_type) sizeof core_header, abfd);
if (val <= 0)
break;
switch (core_header.type)
{
case CORE_KERNEL:
case CORE_FORMAT:
/* Just skip this. */
bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
good_sections++;
break;
case CORE_EXEC:
{
struct proc_exec proc_exec;
if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len,
abfd) != core_header.len)
break;
strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1);
good_sections++;
}
break;
case CORE_PROC:
{
struct proc_info proc_info;
char secname[100]; /* Of arbitrary size, but plenty large. */
/* We need to read this section, 'cause we need to determine
whether the core-dumped app was threaded before we create
any .reg sections. */
if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd)
!= core_header.len)
break;
/* However, we also want to create those sections with the
file positioned at the start of the record, it seems. */
if (bfd_seek (abfd, -((file_ptr) core_header.len), SEEK_CUR) != 0)
break;
#if defined(PROC_INFO_HAS_THREAD_ID)
core_kernel_thread_id (abfd) = proc_info.lwpid;
core_user_thread_id (abfd) = proc_info.user_tid;
#else
core_kernel_thread_id (abfd) = 0;
core_user_thread_id (abfd) = 0;
#endif
/* If the program was unthreaded, then we'll just create a
.reg section.
If the program was threaded, then we'll create .reg/XXXXX
section for each thread, where XXXXX is a printable
representation of the kernel thread id. We'll also
create a .reg section for the thread that was running
and signalled at the time of the core-dump (i.e., this
is effectively an alias, needed to keep GDB happy.)
Note that we use `.reg/XXXXX' as opposed to '.regXXXXX'
because GDB expects that .reg2 will be the floating-
point registers. */
if (core_kernel_thread_id (abfd) == 0)
{
if (!make_bfd_asection (abfd, ".reg",
SEC_HAS_CONTENTS,
core_header.len,
(bfd_vma) offsetof (struct proc_info,
hw_regs),
2))
goto fail;
}
else
{
/* There are threads. Is this the one that caused the
core-dump? We'll claim it was the running thread. */
if (proc_info.sig != -1)
{
if (!make_bfd_asection (abfd, ".reg",
SEC_HAS_CONTENTS,
core_header.len,
(bfd_vma)offsetof (struct proc_info,
hw_regs),
2))
goto fail;
}
/* We always make one of these sections, for every thread. */
sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd));
if (!make_bfd_asection (abfd, secname,
SEC_HAS_CONTENTS,
core_header.len,
(bfd_vma) offsetof (struct proc_info,
hw_regs),
2))
goto fail;
}
core_signal (abfd) = proc_info.sig;
if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0)
break;
good_sections++;
}
break;
case CORE_DATA:
case CORE_STACK:
case CORE_TEXT:
case CORE_MMF:
case CORE_SHM:
case CORE_ANON_SHMEM:
if (!make_bfd_asection (abfd, ".data",
SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
core_header.len,
(bfd_vma) core_header.addr, 2))
goto fail;
bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
good_sections++;
break;
case CORE_NONE:
/* Let's not punt if we encounter a section of unknown
type. Rather, let's make a note of it. If we later
see that there were also "good" sections, then we'll
declare that this a core file, but we'll also warn that
it may be incompatible with this gdb.
*/
unknown_sections++;
break;
default:
goto fail; /*unrecognized core file type */
}
}
/* OK, we believe you. You're a core file (sure, sure). */
/* On HP/UX, we sometimes encounter core files where none of the threads
was found to be the running thread (ie the signal was set to -1 for
all threads). This happens when the program was aborted externally
via a TT_CORE ttrace system call. In that case, we just pick one
thread at random to be the active thread. */
if (core_kernel_thread_id (abfd) != 0
&& bfd_get_section_by_name (abfd, ".reg") == NULL)
{
asection *asect = bfd_sections_find_if (abfd, thread_section_p, NULL);
asection *reg_sect;
if (asect != NULL)
{
reg_sect = make_bfd_asection (abfd, ".reg", asect->flags,
asect->size, asect->vma,
asect->alignment_power);
if (reg_sect == NULL)
goto fail;
reg_sect->filepos = asect->filepos;
}
}
/* Were there sections of unknown type? If so, yet there were
at least some complete sections of known type, then, issue
a warning. Possibly the core file was generated on a version
of HP-UX that is incompatible with that for which this gdb was
built.
*/
if ((unknown_sections > 0) && (good_sections > 0))
(*_bfd_error_handler)
("%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",
abfd->filename);
return abfd->xvec;
fail:
bfd_release (abfd, core_hdr (abfd));
core_hdr (abfd) = NULL;
bfd_section_list_clear (abfd);
return NULL;
}
static char *
hpux_core_core_file_failing_command (bfd *abfd)
{
return core_command (abfd);
}
static int
hpux_core_core_file_failing_signal (bfd *abfd)
{
return core_signal (abfd);
}
/* If somebody calls any byte-swapping routines, shoot them. */
static void
swap_abort (void)
{
abort(); /* This way doesn't require any declaration for ANSI to fuck up */
}
#define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
#define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
const bfd_target hpux_core_vec =
{
"hpux-core",
bfd_target_unknown_flavour,
BFD_ENDIAN_BIG, /* target byte order */
BFD_ENDIAN_BIG, /* target headers byte order */
(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
0, /* symbol prefix */
' ', /* ar_pad_char */
16, /* ar_max_namelen */
0, /* match priority. */
NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
{ /* bfd_check_format */
_bfd_dummy_target, /* unknown format */
_bfd_dummy_target, /* object file */
_bfd_dummy_target, /* archive */
hpux_core_core_file_p /* a core file */
},
{ /* bfd_set_format */
bfd_false, bfd_false,
bfd_false, bfd_false
},
{ /* bfd_write_contents */
bfd_false, bfd_false,
bfd_false, bfd_false
},
BFD_JUMP_TABLE_GENERIC (_bfd_generic),
BFD_JUMP_TABLE_COPY (_bfd_generic),
BFD_JUMP_TABLE_CORE (hpux_core),
BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
BFD_JUMP_TABLE_WRITE (_bfd_generic),
BFD_JUMP_TABLE_LINK (_bfd_nolink),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
NULL,
NULL /* backend_data */
};
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