| /* BFD back end for Lynx core files |
| Copyright (C) 1993-2016 Free Software Foundation, Inc. |
| Written by Stu Grossman of 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. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "libbfd.h" |
| |
| #ifdef LYNX_CORE |
| |
| #include <sys/conf.h> |
| #include <sys/kernel.h> |
| /* sys/kernel.h should define this, but doesn't always, sigh. */ |
| #ifndef __LYNXOS |
| #define __LYNXOS |
| #endif |
| #include <sys/mem.h> |
| #include <sys/signal.h> |
| #include <sys/time.h> |
| #include <sys/resource.h> |
| #include <sys/itimer.h> |
| #include <sys/file.h> |
| #include <sys/proc.h> |
| |
| /* These are stored in the bfd's tdata */ |
| |
| struct lynx_core_struct |
| { |
| int sig; |
| char cmd[PNMLEN + 1]; |
| }; |
| |
| #define core_hdr(bfd) ((bfd)->tdata.lynx_core_data) |
| #define core_signal(bfd) (core_hdr(bfd)->sig) |
| #define core_command(bfd) (core_hdr(bfd)->cmd) |
| |
| #define lynx_core_file_matches_executable_p generic_core_file_matches_executable_p |
| #define lynx_core_file_pid _bfd_nocore_core_file_pid |
| |
| /* Handle Lynx core dump file. */ |
| |
| static asection * |
| make_bfd_asection (bfd *abfd, |
| const char *name, |
| flagword flags, |
| bfd_size_type size, |
| bfd_vma vma, |
| file_ptr filepos) |
| { |
| 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_with_flags (abfd, newname, flags); |
| if (!asect) |
| return NULL; |
| |
| asect->size = size; |
| asect->vma = vma; |
| asect->filepos = filepos; |
| asect->alignment_power = 2; |
| |
| return asect; |
| } |
| |
| const bfd_target * |
| lynx_core_file_p (bfd *abfd) |
| { |
| int secnum; |
| struct pssentry pss; |
| bfd_size_type tcontext_size; |
| core_st_t *threadp; |
| int pagesize; |
| asection *newsect; |
| bfd_size_type amt; |
| |
| pagesize = getpagesize (); /* Serious cross-target issue here... This |
| really needs to come from a system-specific |
| header file. */ |
| |
| /* Get the pss entry from the core file */ |
| |
| if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) |
| return NULL; |
| |
| amt = sizeof pss; |
| if (bfd_bread ((void *) &pss, amt, abfd) != amt) |
| { |
| /* Too small to be a core file */ |
| if (bfd_get_error () != bfd_error_system_call) |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| amt = sizeof (struct lynx_core_struct); |
| core_hdr (abfd) = (struct lynx_core_struct *) bfd_zalloc (abfd, amt); |
| |
| if (!core_hdr (abfd)) |
| return NULL; |
| |
| strncpy (core_command (abfd), pss.pname, PNMLEN + 1); |
| |
| /* Compute the size of the thread contexts */ |
| |
| tcontext_size = pss.threadcnt * sizeof (core_st_t); |
| |
| /* Allocate space for the thread contexts */ |
| |
| threadp = (core_st_t *) bfd_alloc (abfd, tcontext_size); |
| if (!threadp) |
| goto fail; |
| |
| /* Save thread contexts */ |
| |
| if (bfd_seek (abfd, (file_ptr) pagesize, SEEK_SET) != 0) |
| goto fail; |
| |
| if (bfd_bread ((void *) threadp, tcontext_size, abfd) != tcontext_size) |
| { |
| /* Probably too small to be a core file */ |
| if (bfd_get_error () != bfd_error_system_call) |
| bfd_set_error (bfd_error_wrong_format); |
| goto fail; |
| } |
| |
| core_signal (abfd) = threadp->currsig; |
| |
| newsect = make_bfd_asection (abfd, ".stack", |
| SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, |
| pss.ssize, |
| pss.slimit, |
| pagesize + tcontext_size); |
| if (!newsect) |
| goto fail; |
| |
| newsect = make_bfd_asection (abfd, ".data", |
| SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, |
| pss.data_len + pss.bss_len, |
| pss.data_start, |
| pagesize + tcontext_size + pss.ssize |
| #if defined (SPARC) || defined (__SPARC__) |
| /* SPARC Lynx seems to start dumping |
| the .data section at a page |
| boundary. It's OK to check a |
| #define like SPARC here because this |
| file can only be compiled on a Lynx |
| host. */ |
| + pss.data_start % pagesize |
| #endif |
| ); |
| if (!newsect) |
| goto fail; |
| |
| /* And, now for the .reg/XXX pseudo sections. Each thread has it's own |
| .reg/XXX section, where XXX is the thread id (without leading zeros). The |
| currently running thread (at the time of the core dump) also has an alias |
| called `.reg' (just to keep GDB happy). Note that we use `.reg/XXX' as |
| opposed to `.regXXX' because GDB expects that .reg2 will be the floating- |
| point registers. */ |
| |
| newsect = make_bfd_asection (abfd, ".reg", |
| SEC_HAS_CONTENTS, |
| sizeof (core_st_t), |
| 0, |
| pagesize); |
| if (!newsect) |
| goto fail; |
| |
| for (secnum = 0; secnum < pss.threadcnt; secnum++) |
| { |
| char secname[100]; |
| |
| sprintf (secname, ".reg/%d", BUILDPID (0, threadp[secnum].tid)); |
| newsect = make_bfd_asection (abfd, secname, |
| SEC_HAS_CONTENTS, |
| sizeof (core_st_t), |
| 0, |
| pagesize + secnum * sizeof (core_st_t)); |
| if (!newsect) |
| goto fail; |
| } |
| |
| return abfd->xvec; |
| |
| fail: |
| bfd_release (abfd, core_hdr (abfd)); |
| core_hdr (abfd) = NULL; |
| bfd_section_list_clear (abfd); |
| return NULL; |
| } |
| |
| char * |
| lynx_core_file_failing_command (bfd *abfd) |
| { |
| return core_command (abfd); |
| } |
| |
| int |
| lynx_core_file_failing_signal (bfd *abfd) |
| { |
| return core_signal (abfd); |
| } |
| |
| #endif /* LYNX_CORE */ |