| /* BFD back-end for HP/UX core files. |
| Copyright 1993, 1994, 1996, 1998, 1999, 2001, 2002, 2003, 2004, 2005, 2006, |
| 2007, 2008, 2010, 2011, 2012 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 */ |
| }; |
