From 10dea9ed170e609d2f8099aee608a81106547cb3 Mon Sep 17 00:00:00 2001 From: David Henkel-Wallace Date: Wed, 20 May 1992 06:47:14 +0000 Subject: [PATCH] A couple of things from the net. --- bfd/ChangeLog | 11 ++ bfd/aoutx.h | 26 ++--- bfd/sco-core.c | 288 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 309 insertions(+), 16 deletions(-) create mode 100644 bfd/sco-core.c diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 852e7afd82e..c5e5fff2012 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,14 @@ +Tue May 19 23:42:10 1992 D. V. Henkel-Wallace (gumby@cygnus.com) + + * sco-core.c: new file from net. + * aoutx.h (translate_to_native_sym_flags): bugfix from net: + Now we have the hairy linker, it's possible to move symbols from + one section into another. Actually make that work! + +Sat May 16 17:57:59 1992 K. Richard Pixley (rich@rtl.cygnus.com) + + * hosts/sun3.h: fix declaration of free. + Tue May 12 14:08:59 1992 Steve Chamberlain (sac@thepub.cygnus.com) * coff-a29k.c (perform_reloc): fix bug in jmp/call evaluation diff --git a/bfd/aoutx.h b/bfd/aoutx.h index c1b36d4fe2e..a97cd58147e 100644 --- a/bfd/aoutx.h +++ b/bfd/aoutx.h @@ -935,6 +935,10 @@ DEFUN(translate_to_native_sym_flags,(sym_pointer, cache_ptr, abfd), { bfd_vma value = cache_ptr->value; + /* mask out any existing type bits in case copying from one section + to another */ + sym_pointer->e_type[0] &= ~N_TYPE; + if (bfd_get_output_section(cache_ptr) == obj_bsssec (abfd)) { sym_pointer->e_type[0] |= N_BSS; } @@ -1199,14 +1203,9 @@ DEFUN(NAME(aout,swap_std_reloc_out),(abfd, g, natptr), /* name was clobbered by aout_write_syms to be symbol index */ - if (output_section == &bfd_abs_section) - { - r_extern = 0; - r_index = N_ABS; - r_addend += sym->value; - } - else if (output_section == &bfd_com_section - || output_section == &bfd_und_section) +if (output_section == &bfd_com_section + || output_section == &bfd_abs_section + || output_section == &bfd_und_section) { /* Fill in symbol */ r_extern = 1; @@ -1269,14 +1268,9 @@ DEFUN(NAME(aout,swap_ext_reloc_out),(abfd, g, natptr), r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma; - if (output_section == &bfd_abs_section) - { - r_extern = 0; - r_index = N_ABS; - r_addend += sym->value; - } - else if (output_section == &bfd_com_section - || output_section == &bfd_und_section) + if (output_section == &bfd_com_section + || output_section == &bfd_abs_section + || output_section == &bfd_und_section) { /* Fill in symbol */ r_extern = 1; diff --git a/bfd/sco-core.c b/bfd/sco-core.c new file mode 100644 index 00000000000..1485b7ca0e5 --- /dev/null +++ b/bfd/sco-core.c @@ -0,0 +1,288 @@ +/* BFD back end for SCO System V 3.2 Unix core files + This was based on trad-core.c, which was written by John Gilmore of + Cygnus Support. + Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc. + Written by Scott Michel, IntelliMED Corporation. scottm%intime@uunet + + NB: This does work with SCO System V 3.2 Unix and ODT. However, it + may well work with other i386 based *nixen and *nixes. + +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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* To use this file on a particular host, configure the host with these + parameters in the config/h-HOST file: + + HDEFINES=-DSCO_CORE=1 + HDEPFILES=sco-core.o + */ + +#include "bfd.h" +#include "sysdep.h" +#include "libbfd.h" +#include "obstack.h" +#include "coff/i386.h" +#include "coff/internal.h" +#include "libcoff.h" + +#include +#include +#include +#include +#include + +#include +#include /* After a.out.h */ + +#include + + struct trad_core_struct + { + asection *data_section; + asection *stack_section; + asection *reg_section; + + struct user u; + } *rawptr; + + +#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) + +/* Handle 4.2-style (and perhaps also sysV-style) core dump file. */ + +/* ARGSUSED */ +bfd_target * +sco_core_file_p (abfd) + bfd *abfd; + +{ + int val; + struct user u; + /* This struct is just for allocating two things with one zalloc, so + they will be freed together, without violating alignment constraints. */ + + + bfd_seek(abfd, 0, SEEK_SET); + val = bfd_read ((void *)&u, 1, sizeof u, abfd); + if (val != sizeof u) + return 0; /* Too small to be a core file */ + + /* Check that the size claimed is no greater than the file size. FIXME. */ + + /* 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) { + bfd_error = no_memory; + 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 *) zalloc (sizeof (asection)); + if (core_stacksec (abfd) == NULL) { + loser: + bfd_error = no_memory; + free ((void *)rawptr); + return 0; + } + core_datasec (abfd) = (asection *) zalloc (sizeof (asection)); + if (core_datasec (abfd) == NULL) { + loser1: + free ((void *)core_stacksec (abfd)); + goto loser; + } + core_regsec (abfd) = (asection *) zalloc (sizeof (asection)); + if (core_regsec (abfd) == NULL) { + free ((void *)core_datasec (abfd)); + goto loser1; + } + + core_stacksec (abfd)->name = ".stack"; + core_datasec (abfd)->name = ".data"; + core_regsec (abfd)->name = ".reg"; + + 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_ALLOC + SEC_HAS_CONTENTS; + + core_datasec (abfd)->_raw_size = NBPC * u.u_dsize; + core_stacksec (abfd)->_raw_size = NBPC * u.u_ssize; + core_regsec (abfd)->_raw_size = NBPC * USIZE; /* Larger than sizeof struct u */ + + /* Under SCO, we get at the exact addresses of things: */ + core_datasec (abfd)->vma = u.u_exdata.ux_datorg; + core_stacksec (abfd)->vma = u.u_sub; + + /* 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. */ + core_regsec (abfd)->vma = 0 - (int) u.u_ar0; + + core_datasec (abfd)->filepos = NBPC * USIZE; + core_stacksec (abfd)->filepos = (NBPC * USIZE) + NBPC * u.u_dsize; + core_regsec (abfd)->filepos = 0; /* Register segment is the upage */ + + /* 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 * +sco_core_file_failing_command (abfd) + bfd *abfd; +{ + char *com = abfd->tdata.trad_core_data->u.u_comm; + if (*com) + return com; + else + return 0; +} + +/* ARGSUSED */ +int +sco_core_file_failing_signal (abfd) + bfd *abfd; +{ + int retval = -1; + + if (core_upage(abfd)->u_sysabort != 0) + retval = core_upage(abfd)->u_sysabort; + + return retval; +} + +/* ARGSUSED */ +boolean +sco_core_file_matches_executable_p (core_bfd, exec_bfd) + bfd *core_bfd, *exec_bfd; +{ + return true; +} + +/* No archive file support via this BFD */ +#define sco_openr_next_archived_file bfd_generic_openr_next_archived_file +#define sco_generic_stat_arch_elt bfd_generic_stat_arch_elt +#define sco_slurp_armap bfd_false +#define sco_slurp_extended_name_table bfd_true +#define sco_write_armap (PROTO (boolean, (*), \ + (bfd *arch, unsigned int elength, struct orl *map, \ + unsigned int orl_count, int stridx))) bfd_false +#define sco_truncate_arname bfd_dont_truncate_arname +#define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file + +#define sco_close_and_cleanup bfd_generic_close_and_cleanup +#define sco_set_section_contents (PROTO(boolean, (*), \ + (bfd *abfd, asection *section, PTR data, file_ptr offset, \ + bfd_size_type count))) bfd_false +#define sco_get_section_contents bfd_generic_get_section_contents +#define sco_new_section_hook (PROTO (boolean, (*), \ + (bfd *, sec_ptr))) bfd_true +#define sco_get_symtab_upper_bound bfd_0u +#define sco_get_symtab (PROTO (unsigned int, (*), \ + (bfd *, struct symbol_cache_entry **))) bfd_0u +#define sco_get_reloc_upper_bound (PROTO (unsigned int, (*), \ + (bfd *, sec_ptr))) bfd_0u +#define sco_canonicalize_reloc (PROTO (unsigned int, (*), \ + (bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u +#define sco_make_empty_symbol (PROTO ( \ + struct symbol_cache_entry *, (*), (bfd *))) bfd_false +#define sco_print_symbol (PROTO (void, (*), \ + (bfd *, PTR, struct symbol_cache_entry *, \ + bfd_print_symbol_type))) bfd_false +#define sco_get_lineno (PROTO (alent *, (*), \ + (bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr +#define sco_set_arch_mach (PROTO (boolean, (*), \ + (bfd *, enum bfd_architecture, unsigned long))) bfd_false +#define sco_find_nearest_line (PROTO (boolean, (*), \ + (bfd *abfd, struct sec *section, \ + struct symbol_cache_entry **symbols,bfd_vma offset, \ + CONST char **file, CONST char **func, unsigned int *line))) bfd_false +#define sco_sizeof_headers (PROTO (int, (*), \ + (bfd *, boolean))) bfd_0 + +#define sco_bfd_debug_info_start bfd_void +#define sco_bfd_debug_info_end bfd_void +#define sco_bfd_debug_info_accumulate (PROTO (void, (*), \ + (bfd *, struct sec *))) bfd_void +#define sco_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents +#define sco_bfd_relax_section bfd_generic_relax_section +/* If somebody calls any byte-swapping routines, shoot them. */ +void +swap_abort() +{ + abort(); /* This way doesn't require any declaration for ANSI to fuck up */ +} +#define NO_GET ((PROTO(bfd_vma, (*), ( bfd_byte *))) swap_abort ) +#define NO_PUT ((PROTO(void, (*), (bfd_vma, bfd_byte *))) swap_abort ) + +bfd_target sco_core_vec = + { + "sco-core", + bfd_target_unknown_flavour, + true, /* target byte order */ + true, /* target headers byte order */ + (HAS_RELOC | EXEC_P | /* object flags */ + HAS_LINENO | HAS_DEBUG | + HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT), + + (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ + ' ', /* ar_pad_char */ + 16, /* ar_max_namelen */ + 3, /* minimum alignment power */ + NO_GET, NO_PUT, NO_GET, NO_PUT, NO_GET, NO_PUT, /* data */ + NO_GET, NO_PUT, NO_GET, NO_PUT, NO_GET, NO_PUT, /* hdrs */ + + {_bfd_dummy_target, _bfd_dummy_target, + _bfd_dummy_target, sco_core_file_p}, + {bfd_false, bfd_false, /* bfd_create_object */ + bfd_false, bfd_false}, + {bfd_false, bfd_false, /* bfd_write_contents */ + bfd_false, bfd_false}, + + JUMP_TABLE(sco), +}; + + -- 2.30.2