/* BFD back-end for HP/UX core files.
- Copyright 1993 Free Software Foundation, Inc.
+ Copyright 1993, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
Written by Stu Grossman, Cygnus Support.
Converted to back-end form by Ian Lance Taylor, Cygnus SUpport
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This file can only be compiled on systems which use HP/UX style
- core files. In the config/XXXXXX.mh file for such a system add
- HDEFINES=-DHPUX_CORE
- HDEPFILES=hpux-core.o
- */
+ core files. */
#include "bfd.h"
#include "sysdep.h"
#endif /* HOST_HPPABSD */
-#include <stdio.h>
-#include <sys/types.h>
#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include <machine/reg.h>
#include <sys/user.h> /* After a.out.h */
#include <sys/file.h>
-#include <errno.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];
- asection *data_section;
- asection *stack_section;
- asection *reg_section;
};
#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_datasec(bfd) (core_hdr(bfd)->data_section)
-#define core_stacksec(bfd) (core_hdr(bfd)->stack_section)
-#define core_regsec(bfd) (core_hdr(bfd)->reg_section)
+#define core_kernel_thread_id(bfd) (core_hdr(bfd)->lwpid)
+#define core_user_thread_id(bfd) (core_hdr(bfd)->user_tid)
+
+static void swap_abort PARAMS ((void));
static asection *
make_bfd_asection (abfd, name, flags, _raw_size, vma, alignment_power)
unsigned int alignment_power;
{
asection *asect;
+ char *newname;
+
+ newname = bfd_alloc (abfd, strlen (name) + 1);
+ if (!newname)
+ return NULL;
+
+ strcpy (newname, name);
- asect = bfd_make_section (abfd, name);
+ asect = bfd_make_section_anyway (abfd, newname);
if (!asect)
return NULL;
return new;
}
-static bfd_target *
+
+/* 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 (abfd)
bfd *abfd;
{
+ int good_sections = 0;
+ int unknown_sections = 0;
+
core_hdr (abfd) = (struct hpux_core_struct *)
bfd_zalloc (abfd, sizeof (struct hpux_core_struct));
if (!core_hdr (abfd))
case CORE_KERNEL:
case CORE_FORMAT:
bfd_seek (abfd, core_header.len, SEEK_CUR); /* Just skip this */
+ good_sections++;
break;
case CORE_EXEC:
{
!= core_header.len)
break;
strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1);
+ good_sections++;
}
break;
case CORE_PROC:
{
struct proc_info proc_info;
- core_regsec (abfd) = make_bfd_asection (abfd, ".reg",
- SEC_ALLOC + SEC_HAS_CONTENTS,
- core_header.len,
- (int) &proc_info - (int) &proc_info.hw_regs,
- 2);
+ 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_read (&proc_info, 1, 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, -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,
+ (int) &proc_info - (int) & proc_info.hw_regs,
+ 2))
+ return NULL;
+ }
+ 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,
+ (int) &proc_info - (int) & proc_info.hw_regs,
+ 2))
+ return NULL;
+ }
+ /* 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,
+ (int) &proc_info - (int) & proc_info.hw_regs,
+ 2))
+ return NULL;
+ }
core_signal (abfd) = proc_info.sig;
+ if (bfd_seek (abfd, core_header.len, SEEK_CUR) != 0)
+ break;
+ good_sections++;
}
- if (!core_regsec (abfd))
- return NULL;
break;
+
case CORE_DATA:
- core_datasec (abfd) = make_bfd_asection (abfd, ".data",
- SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
- core_header.len,
- core_header.addr,
- 2);
- if (!core_datasec (abfd))
- return NULL;
- bfd_seek (abfd, core_header.len, SEEK_CUR);
- break;
case CORE_STACK:
- core_stacksec (abfd) = make_bfd_asection (abfd, ".stack",
- SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
- core_header.len,
- core_header.addr,
- 2);
- if (!core_stacksec (abfd))
+ 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, core_header.addr, 2))
return NULL;
+
bfd_seek (abfd, core_header.len, SEEK_CUR);
+ good_sections++;
break;
- default:
- /* Falling into here is an error and should prevent this
- target from matching. That way systems which use hpux
- cores along with other formats can still work. */
- return 0;
+
+ 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: return 0; /*unrecognized core file type */
}
}
/* OK, we believe you. You're a core file (sure, sure). */
+ /* 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))
+ warning ("%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;
}
#define hpux_core_get_symtab _bfd_nosymbols_get_symtab
#define hpux_core_print_symbol _bfd_nosymbols_print_symbol
#define hpux_core_get_symbol_info _bfd_nosymbols_get_symbol_info
-#define hpux_core_bfd_is_local_label _bfd_nosymbols_bfd_is_local_label
+#define hpux_core_bfd_is_local_label_name \
+ _bfd_nosymbols_bfd_is_local_label_name
#define hpux_core_get_lineno _bfd_nosymbols_get_lineno
#define hpux_core_find_nearest_line _bfd_nosymbols_find_nearest_line
#define hpux_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
+#define hpux_core_read_minisymbols _bfd_nosymbols_read_minisymbols
+#define hpux_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
/* If somebody calls any byte-swapping routines, shoot them. */
-void
+static void
swap_abort()
{
abort(); /* This way doesn't require any declaration for ANSI to fuck up */
#define NO_SIGNED_GET \
((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
-bfd_target hpux_core_vec =
+const bfd_target hpux_core_vec =
{
"hpux-core",
bfd_target_unknown_flavour,
- true, /* target byte order */
- true, /* target headers byte order */
+ 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),
0, /* symbol prefix */
' ', /* ar_pad_char */
16, /* ar_max_namelen */
- 3, /* minimum alignment power */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
BFD_JUMP_TABLE_WRITE (_bfd_generic),
BFD_JUMP_TABLE_LINK (_bfd_nolink),
+ BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
(PTR) 0 /* backend_data */
};
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