From 252b5132c753830d5fd56823373aed85f2a0db63 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 3 May 1999 07:29:11 +0000 Subject: 19990502 sourceware import --- bfd/ptrace-core.c | 230 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 230 insertions(+) create mode 100644 bfd/ptrace-core.c (limited to 'bfd/ptrace-core.c') diff --git a/bfd/ptrace-core.c b/bfd/ptrace-core.c new file mode 100644 index 0000000..2b4fdbb --- /dev/null +++ b/bfd/ptrace-core.c @@ -0,0 +1,230 @@ +/* BFD backend for core files which use the ptrace_user structure + Copyright 1993, 94, 95, 96, 1998 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#ifdef PTRACE_CORE + +#include "bfd.h" +#include "sysdep.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 PARAMS ((bfd *abfd)); +char * ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd)); +int ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd)); +boolean ptrace_unix_core_file_matches_executable_p + PARAMS ((bfd *core_bfd, bfd *exec_bfd)); +static void swap_abort PARAMS ((void)); + +/* ARGSUSED */ +const bfd_target * +ptrace_unix_core_file_p (abfd) + bfd *abfd; + +{ + int val; + struct ptrace_user u; + struct trad_core_struct *rawptr; + + val = bfd_read ((void *)&u, 1, 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. */ + rawptr = (struct trad_core_struct *) + bfd_zalloc (abfd, sizeof (struct trad_core_struct)); + + 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. This is raunchy, but bfd_close wants to free + them separately. */ + + core_stacksec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection)); + if (core_stacksec (abfd) == NULL) + return NULL; + core_datasec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection)); + if (core_datasec (abfd) == NULL) + return NULL; + core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection)); + if (core_regsec (abfd) == NULL) + return NULL; + + core_stacksec (abfd)->name = ".stack"; + core_datasec (abfd)->name = ".data"; + core_regsec (abfd)->name = ".reg"; + + /* 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_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; + core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; + core_regsec (abfd)->flags = SEC_HAS_CONTENTS; + + core_datasec (abfd)->_raw_size = u.pt_dsize; + core_stacksec (abfd)->_raw_size = u.pt_ssize; + core_regsec (abfd)->_raw_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; + + abfd->sections = core_stacksec (abfd); + core_stacksec (abfd)->next = core_datasec (abfd); + core_datasec (abfd)->next = core_regsec (abfd); + abfd->section_count = 3; + + return abfd->xvec; +} + +char * +ptrace_unix_core_file_failing_command (abfd) + bfd *abfd; +{ + char *com = abfd->tdata.trad_core_data->u.pt_comm; + if (*com) + return com; + else + return 0; +} + +/* ARGSUSED */ +int +ptrace_unix_core_file_failing_signal (abfd) + bfd *abfd; +{ + return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num; +} + +/* ARGSUSED */ +boolean +ptrace_unix_core_file_matches_executable_p (core_bfd, exec_bfd) + bfd *core_bfd, *exec_bfd; +{ + /* FIXME: Use pt_timdat field of the ptrace_user structure to match + the date of the executable */ + return true; +} + +/* If somebody calls any byte-swapping routines, shoot them. */ +static void +swap_abort() +{ + abort(); /* This way doesn't require any declaration for ANSI to fuck up */ +} +#define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort ) +#define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort ) +#define NO_SIGNED_GET \ + ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) 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_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 */ + NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */ + NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */ + NO_GET, NO_SIGNED_GET, 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), + + (PTR) 0 /* backend_data */ +}; + +#endif /* PTRACE_CORE */ -- cgit v1.1