/* BFD backend for core files which use the ptrace_user structure Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2012 Free Software Foundation, Inc. The structure of this file is based on trad-core.c written by John Gilmore of Cygnus Support. Modified to work with the ptrace_user structure by Kevin A. Buettner. (Longterm it may be better to merge this file with trad-core.c) 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. */ #ifdef PTRACE_CORE #include "sysdep.h" #include "bfd.h" #include "libbfd.h" #include #include #include #include struct trad_core_struct { asection *data_section; asection *stack_section; asection *reg_section; struct ptrace_user u; }; #define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u)) #define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section) #define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section) #define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section) /* forward declarations */ const bfd_target *ptrace_unix_core_file_p (bfd *abfd); char * ptrace_unix_core_file_failing_command (bfd *abfd); int ptrace_unix_core_file_failing_signal (bfd *abfd); #define ptrace_unix_core_file_matches_executable_p generic_core_file_matches_executable_p #define ptrace_unix_core_file_pid _bfd_nocore_core_file_pid static void swap_abort (void); const bfd_target * ptrace_unix_core_file_p (bfd *abfd) { int val; struct ptrace_user u; struct trad_core_struct *rawptr; bfd_size_type amt; flagword flags; val = bfd_bread ((void *)&u, (bfd_size_type) sizeof u, abfd); if (val != sizeof u || u.pt_magic != _BCS_PTRACE_MAGIC || u.pt_rev != _BCS_PTRACE_REV) { /* Too small to be a core file */ bfd_set_error (bfd_error_wrong_format); return 0; } /* OK, we believe you. You're a core file (sure, sure). */ /* Allocate both the upage and the struct core_data at once, so a single free() will free them both. */ amt = sizeof (struct trad_core_struct); rawptr = (struct trad_core_struct *) bfd_zalloc (abfd, amt); if (rawptr == NULL) return 0; abfd->tdata.trad_core_data = rawptr; rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */ /* Create the sections. */ flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; core_stacksec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".stack", flags); if (core_stacksec (abfd) == NULL) goto fail; core_datasec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".data", flags); if (core_datasec (abfd) == NULL) goto fail; core_regsec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".reg", SEC_HAS_CONTENTS); if (core_regsec (abfd) == NULL) goto fail; /* FIXME: Need to worry about shared memory, library data, and library text. I don't think that any of these things are supported on the system on which I am developing this for though. */ core_datasec (abfd)->size = u.pt_dsize; core_stacksec (abfd)->size = u.pt_ssize; core_regsec (abfd)->size = sizeof (u); core_datasec (abfd)->vma = u.pt_o_data_start; core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize; core_regsec (abfd)->vma = 0 - sizeof (u); /* see trad-core.c */ core_datasec (abfd)->filepos = (int) u.pt_dataptr; core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize); core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */ /* Align to word at least */ core_stacksec (abfd)->alignment_power = 2; core_datasec (abfd)->alignment_power = 2; core_regsec (abfd)->alignment_power = 2; return abfd->xvec; fail: bfd_release (abfd, abfd->tdata.any); abfd->tdata.any = NULL; bfd_section_list_clear (abfd); return NULL; } char * ptrace_unix_core_file_failing_command (bfd *abfd) { char *com = abfd->tdata.trad_core_data->u.pt_comm; if (*com) return com; else return 0; } int ptrace_unix_core_file_failing_signal (bfd *abfd) { return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num; } /* 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 ptrace_core_vec = { "trad-core", bfd_target_unknown_flavour, BFD_ENDIAN_UNKNOWN, /* target byte order */ BFD_ENDIAN_UNKNOWN, /* 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 */ 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 */ ptrace_unix_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 (ptrace_unix), 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 */ }; #endif /* PTRACE_CORE */