ptrace-core.c revision 89857
133965Sjdp/* BFD backend for core files which use the ptrace_user structure 289857Sobrien Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2001, 2002 378828Sobrien Free Software Foundation, Inc. 433965Sjdp The structure of this file is based on trad-core.c written by John Gilmore 533965Sjdp of Cygnus Support. 633965Sjdp Modified to work with the ptrace_user structure by Kevin A. Buettner. 733965Sjdp (Longterm it may be better to merge this file with trad-core.c) 833965Sjdp 933965SjdpThis file is part of BFD, the Binary File Descriptor library. 1033965Sjdp 1133965SjdpThis program is free software; you can redistribute it and/or modify 1233965Sjdpit under the terms of the GNU General Public License as published by 1333965Sjdpthe Free Software Foundation; either version 2 of the License, or 1433965Sjdp(at your option) any later version. 1533965Sjdp 1633965SjdpThis program is distributed in the hope that it will be useful, 1733965Sjdpbut WITHOUT ANY WARRANTY; without even the implied warranty of 1833965SjdpMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1933965SjdpGNU General Public License for more details. 2033965Sjdp 2133965SjdpYou should have received a copy of the GNU General Public License 2233965Sjdpalong with this program; if not, write to the Free Software 2333965SjdpFoundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 2433965Sjdp 2533965Sjdp#ifdef PTRACE_CORE 2633965Sjdp 2733965Sjdp#include "bfd.h" 2833965Sjdp#include "sysdep.h" 2933965Sjdp#include "libbfd.h" 3033965Sjdp 3133965Sjdp#include <sys/param.h> 3233965Sjdp#include <sys/dir.h> 3333965Sjdp#include <signal.h> 3433965Sjdp#include <sys/ptrace.h> 3533965Sjdp 3633965Sjdpstruct trad_core_struct 3733965Sjdp { 3833965Sjdp asection *data_section; 3933965Sjdp asection *stack_section; 4033965Sjdp asection *reg_section; 4133965Sjdp struct ptrace_user u; 4233965Sjdp }; 4333965Sjdp 4433965Sjdp#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u)) 4533965Sjdp#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section) 4633965Sjdp#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section) 4733965Sjdp#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section) 4833965Sjdp 4933965Sjdp/* forward declarations */ 5033965Sjdp 5133965Sjdpconst bfd_target *ptrace_unix_core_file_p PARAMS ((bfd *abfd)); 5233965Sjdpchar * ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd)); 5333965Sjdpint ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd)); 5433965Sjdpboolean ptrace_unix_core_file_matches_executable_p 5533965Sjdp PARAMS ((bfd *core_bfd, bfd *exec_bfd)); 5633965Sjdpstatic void swap_abort PARAMS ((void)); 5733965Sjdp 5833965Sjdp/* ARGSUSED */ 5933965Sjdpconst bfd_target * 6033965Sjdpptrace_unix_core_file_p (abfd) 6133965Sjdp bfd *abfd; 6233965Sjdp 6333965Sjdp{ 6433965Sjdp int val; 6533965Sjdp struct ptrace_user u; 6633965Sjdp struct trad_core_struct *rawptr; 6789857Sobrien bfd_size_type amt; 6833965Sjdp 6989857Sobrien val = bfd_bread ((void *)&u, (bfd_size_type) sizeof u, abfd); 7077298Sobrien if (val != sizeof u || u.pt_magic != _BCS_PTRACE_MAGIC 7133965Sjdp || u.pt_rev != _BCS_PTRACE_REV) 7233965Sjdp { 7333965Sjdp /* Too small to be a core file */ 7433965Sjdp bfd_set_error (bfd_error_wrong_format); 7533965Sjdp return 0; 7633965Sjdp } 7733965Sjdp 7833965Sjdp /* OK, we believe you. You're a core file (sure, sure). */ 7933965Sjdp 8033965Sjdp /* Allocate both the upage and the struct core_data at once, so 8133965Sjdp a single free() will free them both. */ 8289857Sobrien amt = sizeof (struct trad_core_struct); 8389857Sobrien rawptr = (struct trad_core_struct *) bfd_zalloc (abfd, amt); 8433965Sjdp 8533965Sjdp if (rawptr == NULL) 8633965Sjdp return 0; 8777298Sobrien 8833965Sjdp abfd->tdata.trad_core_data = rawptr; 8933965Sjdp 9033965Sjdp rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */ 9133965Sjdp 9289857Sobrien /* Create the sections. */ 9333965Sjdp 9489857Sobrien core_stacksec (abfd) = bfd_make_section_anyway (abfd, ".stack"); 9533965Sjdp if (core_stacksec (abfd) == NULL) 9689857Sobrien goto fail; 9789857Sobrien core_datasec (abfd) = bfd_make_section_anyway (abfd, ".data"); 9833965Sjdp if (core_datasec (abfd) == NULL) 9989857Sobrien goto fail; 10089857Sobrien core_regsec (abfd) = bfd_make_section_anyway (abfd, ".reg"); 10133965Sjdp if (core_regsec (abfd) == NULL) 10289857Sobrien goto fail; 10333965Sjdp 10433965Sjdp /* FIXME: Need to worry about shared memory, library data, and library 10533965Sjdp text. I don't think that any of these things are supported on the 10677298Sobrien system on which I am developing this for though. */ 10733965Sjdp 10833965Sjdp core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; 10933965Sjdp core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; 11033965Sjdp core_regsec (abfd)->flags = SEC_HAS_CONTENTS; 11133965Sjdp 11233965Sjdp core_datasec (abfd)->_raw_size = u.pt_dsize; 11333965Sjdp core_stacksec (abfd)->_raw_size = u.pt_ssize; 11477298Sobrien core_regsec (abfd)->_raw_size = sizeof (u); 11533965Sjdp 11633965Sjdp core_datasec (abfd)->vma = u.pt_o_data_start; 11733965Sjdp core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize; 11877298Sobrien core_regsec (abfd)->vma = 0 - sizeof (u); /* see trad-core.c */ 11933965Sjdp 12033965Sjdp core_datasec (abfd)->filepos = (int) u.pt_dataptr; 12133965Sjdp core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize); 12233965Sjdp core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */ 12333965Sjdp 12433965Sjdp /* Align to word at least */ 12533965Sjdp core_stacksec (abfd)->alignment_power = 2; 12633965Sjdp core_datasec (abfd)->alignment_power = 2; 12733965Sjdp core_regsec (abfd)->alignment_power = 2; 12833965Sjdp 12989857Sobrien return abfd->xvec; 13033965Sjdp 13189857Sobrien fail: 13289857Sobrien bfd_release (abfd, abfd->tdata.any); 13389857Sobrien abfd->tdata.any = NULL; 13489857Sobrien bfd_section_list_clear (abfd); 13589857Sobrien return NULL; 13633965Sjdp} 13733965Sjdp 13833965Sjdpchar * 13933965Sjdpptrace_unix_core_file_failing_command (abfd) 14033965Sjdp bfd *abfd; 14133965Sjdp{ 14233965Sjdp char *com = abfd->tdata.trad_core_data->u.pt_comm; 14333965Sjdp if (*com) 14433965Sjdp return com; 14533965Sjdp else 14633965Sjdp return 0; 14733965Sjdp} 14833965Sjdp 14933965Sjdp/* ARGSUSED */ 15033965Sjdpint 15133965Sjdpptrace_unix_core_file_failing_signal (abfd) 15233965Sjdp bfd *abfd; 15333965Sjdp{ 15433965Sjdp return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num; 15533965Sjdp} 15633965Sjdp 15733965Sjdp/* ARGSUSED */ 15833965Sjdpboolean 15933965Sjdpptrace_unix_core_file_matches_executable_p (core_bfd, exec_bfd) 16033965Sjdp bfd *core_bfd, *exec_bfd; 16133965Sjdp{ 16277298Sobrien /* FIXME: Use pt_timdat field of the ptrace_user structure to match 16333965Sjdp the date of the executable */ 16433965Sjdp return true; 16533965Sjdp} 16633965Sjdp 16733965Sjdp/* If somebody calls any byte-swapping routines, shoot them. */ 16833965Sjdpstatic void 16977298Sobrienswap_abort () 17033965Sjdp{ 17177298Sobrien abort (); /* This way doesn't require any declaration for ANSI to fuck up */ 17233965Sjdp} 17333965Sjdp#define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort ) 17433965Sjdp#define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort ) 17533965Sjdp#define NO_SIGNED_GET \ 17633965Sjdp ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort ) 17733965Sjdp 17833965Sjdpconst bfd_target ptrace_core_vec = 17933965Sjdp { 18033965Sjdp "trad-core", 18133965Sjdp bfd_target_unknown_flavour, 18233965Sjdp BFD_ENDIAN_UNKNOWN, /* target byte order */ 18333965Sjdp BFD_ENDIAN_UNKNOWN, /* target headers byte order */ 18433965Sjdp (HAS_RELOC | EXEC_P | /* object flags */ 18533965Sjdp HAS_LINENO | HAS_DEBUG | 18633965Sjdp HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 18733965Sjdp (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ 18833965Sjdp 0, /* symbol prefix */ 18933965Sjdp ' ', /* ar_pad_char */ 19033965Sjdp 16, /* ar_max_namelen */ 19133965Sjdp NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */ 19233965Sjdp NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */ 19333965Sjdp NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */ 19433965Sjdp NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */ 19533965Sjdp NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */ 19633965Sjdp NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */ 19733965Sjdp 19833965Sjdp { /* bfd_check_format */ 19933965Sjdp _bfd_dummy_target, /* unknown format */ 20033965Sjdp _bfd_dummy_target, /* object file */ 20133965Sjdp _bfd_dummy_target, /* archive */ 20233965Sjdp ptrace_unix_core_file_p /* a core file */ 20333965Sjdp }, 20433965Sjdp { /* bfd_set_format */ 20533965Sjdp bfd_false, bfd_false, 20633965Sjdp bfd_false, bfd_false 20733965Sjdp }, 20833965Sjdp { /* bfd_write_contents */ 20933965Sjdp bfd_false, bfd_false, 21033965Sjdp bfd_false, bfd_false 21133965Sjdp }, 21277298Sobrien 21333965Sjdp BFD_JUMP_TABLE_GENERIC (_bfd_generic), 21433965Sjdp BFD_JUMP_TABLE_COPY (_bfd_generic), 21533965Sjdp BFD_JUMP_TABLE_CORE (ptrace_unix), 21633965Sjdp BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), 21733965Sjdp BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), 21833965Sjdp BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), 21933965Sjdp BFD_JUMP_TABLE_WRITE (_bfd_generic), 22033965Sjdp BFD_JUMP_TABLE_LINK (_bfd_nolink), 22133965Sjdp BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 22233965Sjdp 22360484Sobrien NULL, 22477298Sobrien 22533965Sjdp (PTR) 0 /* backend_data */ 22633965Sjdp}; 22733965Sjdp 22833965Sjdp#endif /* PTRACE_CORE */ 229