| /* BFD back end for SCO5 core files (U-area and raw sections) |
| Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
| Written by Jouke Numan <jnuman@hiscom.nl> |
| |
| 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. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "libbfd.h" |
| #include "libaout.h" /* BFD a.out internal data structures */ |
| |
| #include <stdio.h> |
| #include <sys/types.h> |
| #include <sys/param.h> |
| #include <sys/dir.h> |
| #include <signal.h> |
| |
| #include <sys/user.h> /* After a.out.h */ |
| #include <sys/paccess.h> |
| #include <sys/region.h> |
| |
| struct sco5_core_struct |
| { |
| struct user u; |
| }; |
| |
| /* forward declarations */ |
| |
| static asection * |
| make_bfd_asection PARAMS ((bfd *, const char *, flagword, bfd_size_type, |
| bfd_vma, file_ptr)); |
| static struct user *read_uarea PARAMS ((bfd *, int)); |
| const bfd_target *sco5_core_file_p PARAMS ((bfd *abfd)); |
| char *sco5_core_file_failing_command PARAMS ((bfd *abfd)); |
| int sco5_core_file_failing_signal PARAMS ((bfd *abfd)); |
| boolean sco5_core_file_matches_executable_p PARAMS ((bfd *core_bfd, |
| bfd *exec_bfd)); |
| static void swap_abort PARAMS ((void)); |
| |
| static asection * |
| make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos) |
| bfd *abfd; |
| const char *name; |
| flagword flags; |
| bfd_size_type _raw_size; |
| bfd_vma vma; |
| file_ptr filepos; |
| { |
| asection *asect; |
| |
| asect = bfd_make_section_anyway (abfd, name); |
| if (!asect) |
| return NULL; |
| asect->flags = flags; |
| asect->_raw_size = _raw_size; |
| asect->vma = vma; |
| asect->filepos = filepos; |
| asect->alignment_power = 2; |
| |
| return asect; |
| } |
| |
| static struct user * |
| read_uarea(abfd, filepos) |
| bfd *abfd; |
| int filepos; |
| |
| { |
| struct sco5_core_struct *rawptr; |
| bfd_size_type amt = sizeof (struct sco5_core_struct); |
| |
| rawptr = (struct sco5_core_struct *) bfd_zmalloc (amt); |
| if (rawptr == NULL) |
| return NULL; |
| |
| abfd->tdata.sco5_core_data = rawptr; |
| |
| if (bfd_seek (abfd, (file_ptr) filepos, SEEK_SET) != 0 |
| || bfd_bread ((void *) &rawptr->u, (bfd_size_type) sizeof rawptr->u, |
| abfd) != sizeof rawptr->u) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| /* Sanity check perhaps??? */ |
| if (rawptr->u.u_dsize > 0x1000000) /* Remember, it's in pages... */ |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| if (rawptr->u.u_ssize > 0x1000000) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| return &rawptr->u; |
| } |
| |
| /* ARGSUSED */ |
| const bfd_target * |
| sco5_core_file_p (abfd) |
| bfd *abfd; |
| { |
| int coffset_siz, val, nsecs, cheadoffs; |
| int coresize; |
| struct user *u; |
| struct coreoffsets coffsets; |
| struct coresecthead chead; |
| char *secname; |
| flagword flags; |
| |
| /* Read coreoffsets region at end of core (see core(FP)) */ |
| |
| { |
| FILE *stream = bfd_cache_lookup (abfd); |
| struct stat statbuf; |
| if (stream == NULL) |
| return NULL; |
| if (fstat (fileno (stream), &statbuf) < 0) |
| { |
| bfd_set_error (bfd_error_system_call); |
| return NULL; |
| } |
| coresize = statbuf.st_size; |
| } |
| /* Last long in core is sizeof struct coreoffsets, read it */ |
| if ((bfd_seek (abfd, (file_ptr) (coresize - sizeof coffset_siz), |
| SEEK_SET) != 0) |
| || bfd_bread ((void *) &coffset_siz, (bfd_size_type) sizeof coffset_siz, |
| abfd) != sizeof coffset_siz) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| /* Use it to seek start of coreoffsets region, read it and determine |
| validity */ |
| if ((bfd_seek (abfd, (file_ptr) (coresize - coffset_siz), SEEK_SET) != 0) |
| || (bfd_bread ((void *) &coffsets, (bfd_size_type) sizeof coffsets, abfd) |
| != sizeof coffsets) |
| || ((coffsets.u_info != 1) && (coffsets.u_info != C_VERSION))) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| return NULL; |
| } |
| |
| if (coffsets.u_info == 1) |
| { |
| /* Old version, no section heads, read info from user struct */ |
| |
| u = read_uarea (abfd, coffsets.u_user); |
| if (! u) |
| goto fail; |
| |
| if (!make_bfd_asection (abfd, ".reg", SEC_HAS_CONTENTS, |
| (bfd_size_type) coffsets.u_usize, |
| 0 - (bfd_vma) u->u_ar0, |
| (file_ptr) coffsets.u_user)) |
| goto fail; |
| |
| if (!make_bfd_asection (abfd, ".data", |
| SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, |
| ((bfd_size_type) u->u_exdata.ux_dsize |
| + u->u_exdata.ux_bsize), |
| (bfd_vma) u->u_exdata.ux_datorg, |
| (file_ptr) coffsets.u_data)) |
| goto fail; |
| |
| if (!make_bfd_asection (abfd, ".stack", |
| SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, |
| (bfd_size_type) u->u_ssize * NBPC, |
| (bfd_vma) u->u_sub, |
| (file_ptr) coffsets.u_stack)) |
| goto fail; |
| |
| return abfd->xvec; /* Done for version 1 */ |
| } |
| |
| /* Immediately before coreoffsets region is a long with offset in core |
| to first coresecthead (CORES_OFFSETS), the long before this is the |
| number of section heads in the list. Read both longs and read the |
| coresecthead and check its validity */ |
| |
| if ((bfd_seek (abfd, |
| (file_ptr) (coresize - coffset_siz - 2 * sizeof coffset_siz), |
| SEEK_SET) != 0) |
| || (bfd_bread ((void *) &nsecs, (bfd_size_type) sizeof nsecs, abfd) |
| != sizeof nsecs) |
| || (bfd_bread ((void *) &cheadoffs, (bfd_size_type) sizeof cheadoffs, |
| abfd) != sizeof cheadoffs) |
| || (bfd_seek (abfd, (file_ptr) cheadoffs, SEEK_SET) != 0) |
| || (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd) |
| != sizeof chead) |
| || (chead.cs_stype != CORES_OFFSETS) |
| || (chead.cs_x.csx_magic != COREMAGIC_NUMBER)) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| goto fail; |
| } |
| |
| /* OK, we believe you. You're a core file (sure, sure). */ |
| |
| /* Now loop over all regions and map them */ |
| nsecs--; /* We've seen CORES_OFFSETS already */ |
| for (; nsecs; nsecs--) |
| { |
| if ((bfd_seek (abfd, (file_ptr) chead.cs_hseek, SEEK_SET) != 0) |
| || (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd) |
| != sizeof chead)) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| goto fail; |
| } |
| |
| switch (chead.cs_stype) |
| { |
| case CORES_MAGIC: /* Core header, check magic */ |
| if (chead.cs_x.csx_magic != COREMAGIC_NUMBER) |
| { |
| bfd_set_error (bfd_error_wrong_format); |
| goto fail; |
| } |
| secname = NULL; |
| nsecs++; /* MAGIC not in section cnt!*/ |
| break; |
| case CORES_UAREA: /* U-area, read in tdata */ |
| u = read_uarea (abfd, chead.cs_sseek); |
| if (! u) |
| goto fail; |
| |
| /* This is tricky. As the "register section", we give them |
| the entire upage and stack. u.u_ar0 points to where |
| "register 0" is stored. There are two tricks with this, |
| though. One is that the rest of the registers might be |
| at positive or negative (or both) displacements from |
| *u_ar0. The other is that u_ar0 is sometimes an absolute |
| address in kernel memory, and on other systems it is an |
| offset from the beginning of the `struct user'. |
| |
| As a practical matter, we don't know where the registers |
| actually are, so we have to pass the whole area to GDB. |
| We encode the value of u_ar0 by setting the .regs section |
| up so that its virtual memory address 0 is at the place |
| pointed to by u_ar0 (by setting the vma of the start of |
| the section to -u_ar0). GDB uses this info to locate the |
| regs, using minor trickery to get around the |
| offset-or-absolute-addr problem. */ |
| |
| chead.cs_vaddr = 0 - (bfd_vma) u->u_ar0; |
| |
| secname = ".reg"; |
| flags = SEC_HAS_CONTENTS; |
| |
| break; |
| case CORES_PREGION: /* A program region, map it */ |
| switch (chead.cs_x.csx_preg.csxp_rtyp) |
| { |
| case PT_DATA: |
| secname = ".data"; /* Data region. */ |
| break; |
| case PT_STACK: |
| secname = ".stack"; /* Stack region. */ |
| break; |
| case PT_SHMEM: |
| secname = ".shmem"; /* Shared memory */ |
| break; |
| case PT_LIBDAT: |
| secname = ".libdat"; /* Shared library data */ |
| break; |
| case PT_V86: |
| secname = ".virt86"; /* Virtual 8086 mode */ |
| break; |
| case PT_SHFIL: |
| secname = ".mmfile"; /* Memory mapped file */ |
| break; |
| case PT_XDATA0: |
| secname = ".Xdat0"; /* XENIX data region, virtual 0 */ |
| break; |
| default: |
| secname = ""; |
| } |
| flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; |
| break; |
| case CORES_PROC: /* struct proc */ |
| case CORES_ITIMER: /* interval timers */ |
| case CORES_SCOUTSNAME: /* struct scoutsname */ |
| secname = NULL; /* Ignore these */ |
| break; |
| default: |
| (*_bfd_error_handler) ("Unhandled SCO core file section type %d\n", |
| chead.cs_stype); |
| continue; |
| } |
| |
| if (secname |
| && !make_bfd_asection (abfd, secname, flags, |
| (bfd_size_type) chead.cs_vsize, |
| (bfd_vma) chead.cs_vaddr, |
| (file_ptr) chead.cs_sseek)) |
| goto fail; |
| |
| } |
| |
| return abfd->xvec; |
| |
| fail: |
| if (abfd->tdata.any) |
| { |
| bfd_release (abfd, abfd->tdata.any); |
| abfd->tdata.any = NULL; |
| } |
| bfd_section_list_clear (abfd); |
| return NULL; |
| } |
| |
| char * |
| sco5_core_file_failing_command (abfd) |
| bfd *abfd; |
| { |
| char *com = abfd->tdata.sco5_core_data->u.u_comm; |
| if (*com) |
| return com; |
| else |
| return NULL; |
| } |
| |
| /* ARGSUSED */ |
| int |
| sco5_core_file_failing_signal (ignore_abfd) |
| bfd *ignore_abfd; |
| { |
| return ((ignore_abfd->tdata.sco5_core_data->u.u_sysabort != 0) |
| ? ignore_abfd->tdata.sco5_core_data->u.u_sysabort |
| : -1); |
| } |
| |
| /* ARGSUSED */ |
| boolean |
| sco5_core_file_matches_executable_p (core_bfd, exec_bfd) |
| bfd *core_bfd ATTRIBUTE_UNUSED; |
| bfd *exec_bfd ATTRIBUTE_UNUSED; |
| { |
| return true; /* FIXME, We have no way of telling at this point */ |
| } |
| |
| /* 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 sco5_core_vec = |
| { |
| "sco5-core", |
| bfd_target_unknown_flavour, |
| BFD_ENDIAN_LITTLE, /* target byte order */ |
| BFD_ENDIAN_LITTLE, /* 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 */ |
| sco5_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 (sco5), |
| 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, |
| |
| (PTR) 0 /* backend_data */ |
| }; |
