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author | Richard Henderson <rth@redhat.com> | 1999-05-03 07:29:11 +0000 |
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committer | Richard Henderson <rth@redhat.com> | 1999-05-03 07:29:11 +0000 |
commit | 252b5132c753830d5fd56823373aed85f2a0db63 (patch) | |
tree | 1af963bfd8d3e55167b81def4207f175eaff3a56 /bfd/sco5-core.c | |
download | gdb-252b5132c753830d5fd56823373aed85f2a0db63.zip gdb-252b5132c753830d5fd56823373aed85f2a0db63.tar.gz gdb-252b5132c753830d5fd56823373aed85f2a0db63.tar.bz2 |
19990502 sourceware importbinu_ss_19990502
Diffstat (limited to 'bfd/sco5-core.c')
-rw-r--r-- | bfd/sco5-core.c | 429 |
1 files changed, 429 insertions, 0 deletions
diff --git a/bfd/sco5-core.c b/bfd/sco5-core.c new file mode 100644 index 0000000..f10c8f1 --- /dev/null +++ b/bfd/sco5-core.c @@ -0,0 +1,429 @@ +/* BFD back end for SCO5 core files (U-area and raw sections) + Copyright 1998 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 asymbol *sco5_core_make_empty_symbol PARAMS ((bfd *)); +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 asymbol * +sco5_core_make_empty_symbol (abfd) + bfd *abfd; +{ + asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol)); + if (new) + new->the_bfd = abfd; + return new; +} + +static struct user * +read_uarea(abfd, filepos) + bfd *abfd; + int filepos; + +{ + struct sco5_core_struct *rawptr; + + rawptr = ((struct sco5_core_struct *) + bfd_zmalloc (sizeof (struct sco5_core_struct))); + if (rawptr == NULL) + return NULL; + + abfd->tdata.sco5_core_data = rawptr; + + if ((bfd_seek (abfd, filepos, SEEK_SET) != 0) + || (bfd_read ((void *)&rawptr->u, 1, 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, coresize-sizeof coffset_siz, SEEK_SET) != 0) + || (bfd_read ((void *)&coffset_siz, 1, 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, coresize-coffset_siz, SEEK_SET) != 0) + || (bfd_read ((void *)&coffsets, 1, 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) + return NULL; + + 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)) + return NULL; + + 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)) + return NULL; + + 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)) + return NULL; + + 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, + coresize - coffset_siz - 2 * sizeof coffset_siz, + SEEK_SET) != 0) + || (bfd_read ((void *)&nsecs, 1, sizeof nsecs, abfd) != sizeof nsecs) + || (bfd_read ((void *)&cheadoffs, 1, sizeof cheadoffs, abfd) + != sizeof cheadoffs) + || (bfd_seek (abfd, cheadoffs, SEEK_SET) != 0) + || (bfd_read ((void *)&chead, 1, sizeof chead, abfd) != sizeof chead) + || (chead.cs_stype != CORES_OFFSETS) + || (chead.cs_x.csx_magic != COREMAGIC_NUMBER)) + { + bfd_set_error (bfd_error_wrong_format); + return NULL; + } + + /* 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, chead.cs_hseek, SEEK_SET) != 0) + || bfd_read ((void *)&chead, 1, sizeof chead, abfd) != sizeof chead) + { + bfd_set_error (bfd_error_wrong_format); + return NULL; + } + + 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); + return NULL; + } + 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) + return NULL; + + /* 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)) + return NULL; + + } + + return abfd->xvec; + +} + +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, *exec_bfd; +{ + return true; /* FIXME, We have no way of telling at this point */ +} + +#define sco5_core_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound +#define sco5_core_get_symtab _bfd_nosymbols_get_symtab +#define sco5_core_print_symbol _bfd_nosymbols_print_symbol +#define sco5_core_get_symbol_info _bfd_nosymbols_get_symbol_info +#define sco5_core_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name +#define sco5_core_get_lineno _bfd_nosymbols_get_lineno +#define sco5_core_find_nearest_line _bfd_nosymbols_find_nearest_line +#define sco5_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol +#define sco5_core_read_minisymbols _bfd_nosymbols_read_minisymbols +#define sco5_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol + +/* 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 (sco5_core), + 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 */ +}; |