7621229598
* symfile.h (ADD_PSYMBOL_VT_TO_LIST), symfile.c (add_psymbol_to_list, add_psymbol_addr_to_list): No longer demangle partial symbols. * symtab.c (lookup_symbol, list_symbols): Handle mangled variables, e.g. C++ static members, via the minimal symbols. Handle reordered functions in an objfile, for Irix 5.2 shared libraries. * objfiles.h (OBJF_REORDERED): New bit in the objfile flags, set if the functions in an objfile are reordered. * mdebugread.c (parse_partial_symbols): Detect reordered functions in an objfile. * symtab.c (find_pc_psymtab, find_pc_symtab): Use expensive lookup algorithm if the functions in the objfile are reordered. * xcoffexec.c (exec_close): If the current target has a copy of the exec_ops sections, reflect the freeing of the sections in current_target. * valops.c (call_function_by_hand): Use `sizeof dummy1', not `sizeof dummy', for constructing the call dummy code. * config/sparc/tm-sparc.h: Add PARAMS declarations to all function declarations. * sparc-tdep.c (sparc_pop_frame): Cast result of read_memory_integer to CORE_ADDR when passing it to PC_ADJUST. * irix5-nat.c (enable_break): Set breakpoint at the entry point of the executable, to handle the case where main resides in a shared library. * irix5-nat.c (solib_create_inferior_hook): Reset stop_soon_quietly after shared library symbol reading, to get rid of a warning from heuristic_proc_start if the startup code has no symbolic debug info. * breakpoint.h (struct breakpoint): Add new fields language and input_radix, to enable breakpoint resetting with the proper language and radix. * breakpoint.c (set_raw_breakpoint): Initialize them. (breakpoint_re_set_one): Use them when resetting the breakpoint. (breakpoint_re_set): Preserve current language and input_radix across breakpoint_re_set_one calls. * symtab.c (decode_line_1): Do not build a canonical line specification for `*expr' line specifications. * breakpoint.h (bpstat_stop_status): Fix prototype declaration.
600 lines
17 KiB
C
600 lines
17 KiB
C
/* Execute AIXcoff files, for GDB.
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Copyright 1988, 1989, 1991, 1992, 1994 Free Software Foundation, Inc.
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Derived from exec.c. Modified by IBM Corporation.
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Donated by IBM Corporation and Cygnus Support.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* xcoff-exec - deal with executing XCOFF files. */
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#include "defs.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <fcntl.h>
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#include <string.h>
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#include <ctype.h>
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#include <sys/stat.h>
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#include "frame.h"
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#include "inferior.h"
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#include "target.h"
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#include "gdbcmd.h"
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#include "gdbcore.h"
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#include "language.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "bfd.h"
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#include "xcoffsolib.h"
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/* Prototypes for local functions */
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static void
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file_command PARAMS ((char *, int));
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static void
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exec_close PARAMS ((int));
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struct vmap *
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map_vmap PARAMS ((bfd *, bfd *));
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struct section_table *exec_sections, *exec_sections_end;
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/* Whether to open exec and core files read-only or read-write. */
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int write_files = 0;
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extern int info_verbose;
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bfd *exec_bfd; /* needed by core.c */
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extern char *getenv();
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extern void add_syms_addr_command ();
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extern void symbol_file_command ();
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static void exec_files_info();
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struct vmap *vmap; /* current vmap */
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extern struct target_ops exec_ops;
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/* exec_close - done with exec file, clean up all resources. */
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static void
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exec_close (quitting)
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int quitting;
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{
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register struct vmap *vp, *nxt;
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int need_symtab_cleanup = 0;
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for (nxt = vmap; nxt; )
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{
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vp = nxt;
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nxt = vp->nxt;
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/* if there is an objfile associated with this bfd,
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free_objfile() will do proper cleanup of objfile *and* bfd. */
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if (vp->objfile)
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{
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free_objfile (vp->objfile);
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need_symtab_cleanup = 1;
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}
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else
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bfd_close (vp->bfd);
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/* FIXME: This routine is #if 0'd in symfile.c. What should we
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be doing here? Should we just free everything in
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vp->objfile->symtabs? Should free_objfile do that? */
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free_named_symtabs (vp->name);
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free (vp);
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}
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vmap = 0;
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/* exec_bfd was already closed (the exec file has a vmap entry). */
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exec_bfd = NULL;
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if (exec_ops.to_sections)
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{
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/* Reflect to_sections freeing in current_target if it is
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the exec target. Otherwise target_xfer_memory (eventually
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called from clear_symtab_users) might access the freed
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exec_ops.to_sections via the copy in current_target. */
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if (current_target.to_sections == exec_ops.to_sections)
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{
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current_target.to_sections = NULL;
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current_target.to_sections_end = NULL;
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}
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free (exec_ops.to_sections);
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exec_ops.to_sections = NULL;
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exec_ops.to_sections_end = NULL;
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}
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/* If we are quitting, we don't want to call breakpoint_re_set which may
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output messages which would just be confusing in this context. */
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if (!quitting && need_symtab_cleanup)
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clear_symtab_users ();
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}
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/* Process the first arg in ARGS as the new exec file.
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Note that we have to explicitly ignore additional args, since we can
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be called from file_command(), which also calls symbol_file_command()
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which can take multiple args. */
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void
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exec_file_command (filename, from_tty)
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char *filename;
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int from_tty;
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{
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target_preopen (from_tty);
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/* Remove any previous exec file. */
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unpush_target (&exec_ops);
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/* Now open and digest the file the user requested, if any. */
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if (filename)
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{
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char *scratch_pathname;
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int scratch_chan;
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filename = tilde_expand (filename);
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make_cleanup (free, filename);
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scratch_chan = openp (getenv ("PATH"), 1, filename,
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write_files? O_RDWR: O_RDONLY, 0,
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&scratch_pathname);
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if (scratch_chan < 0)
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perror_with_name (filename);
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exec_bfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
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if (!exec_bfd)
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error ("Could not open `%s' as an executable file: %s",
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scratch_pathname, bfd_errmsg(bfd_get_error ()));
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/* make sure we have an object file */
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if (!bfd_check_format (exec_bfd, bfd_object))
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error ("\"%s\": not in executable format: %s.", scratch_pathname,
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bfd_errmsg (bfd_get_error ()));
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/* setup initial vmap */
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map_vmap (exec_bfd, 0);
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if (!vmap)
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error ("Can't find the file sections in `%s': %s", exec_bfd->filename,
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bfd_errmsg(bfd_get_error ()));
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if (build_section_table (exec_bfd, &exec_ops.to_sections,
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&exec_ops.to_sections_end))
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error ("Can't find the file sections in `%s': %s", exec_bfd->filename,
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bfd_errmsg (bfd_get_error ()));
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/* make sure core, if present, matches */
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validate_files ();
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push_target(&exec_ops);
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/* Tell display code (if any) about the changed file name. */
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if (exec_file_display_hook)
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(*exec_file_display_hook) (filename);
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}
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else
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{
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exec_close (0); /* just in case */
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if (from_tty)
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printf_unfiltered ("No exec file now.\n");
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}
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}
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/* Set both the exec file and the symbol file, in one command. What a
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novelty. Why did GDB go through four major releases before this
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command was added? */
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static void
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file_command (arg, from_tty)
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char *arg;
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int from_tty;
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{
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/* FIXME, if we lose on reading the symbol file, we should revert
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the exec file, but that's rough. */
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exec_file_command (arg, from_tty);
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symbol_file_command (arg, from_tty);
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}
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/* Locate all mappable sections of a BFD file.
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table_pp_char is a char * to get it through bfd_map_over_sections;
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we cast it back to its proper type. */
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static void
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add_to_section_table (abfd, asect, table_pp_char)
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bfd *abfd;
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sec_ptr asect;
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char *table_pp_char;
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{
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struct section_table **table_pp = (struct section_table **)table_pp_char;
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flagword aflag;
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aflag = bfd_get_section_flags (abfd, asect);
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/* FIXME, we need to handle BSS segment here...it alloc's but doesn't load */
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if (!(aflag & SEC_LOAD))
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return;
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if (0 == bfd_section_size (abfd, asect))
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return;
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(*table_pp)->bfd = abfd;
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(*table_pp)->the_bfd_section = asect;
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(*table_pp)->addr = bfd_section_vma (abfd, asect);
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(*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect);
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(*table_pp)++;
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}
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int
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build_section_table (some_bfd, start, end)
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bfd *some_bfd;
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struct section_table **start, **end;
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{
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unsigned count;
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count = bfd_count_sections (some_bfd);
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if (count == 0)
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fatal ("aborting"); /* return 1? */
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if (*start)
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free (*start);
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*start = (struct section_table *) xmalloc (count * sizeof (**start));
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*end = *start;
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bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end);
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if (*end > *start + count)
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fatal ("aborting");
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/* We could realloc the table, but it probably loses for most files. */
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return 0;
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}
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static void
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bfdsec_to_vmap(bf, sect, arg3)
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bfd *bf;
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sec_ptr sect;
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PTR arg3;
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{
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struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *) arg3;
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register struct vmap *vp;
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vp = vmap_bfd->pvmap;
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if ((bfd_get_section_flags (bf, sect) & SEC_LOAD) == 0)
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return;
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if (STREQ(bfd_section_name (bf, sect), ".text"))
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{
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vp->tstart = 0;
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vp->tend = vp->tstart + bfd_section_size (bf, sect);
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/* When it comes to this adjustment value, in contrast to our previous
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belief shared objects should behave the same as the main load segment.
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This is the offset from the beginning of text section to the first
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real instruction. */
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vp->tadj = sect->filepos - bfd_section_vma (bf, sect);
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}
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else if (STREQ(bfd_section_name (bf, sect), ".data"))
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{
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vp->dstart = 0;
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vp->dend = vp->dstart + bfd_section_size (bf, sect);
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}
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else if (STREQ(bfd_section_name(bf, sect), ".bss")) /* FIXMEmgo */
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printf_unfiltered ("bss section in exec! Don't know what the heck to do!\n");
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}
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/* Make a vmap for the BFD "bf", which might be a member of the archive
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BFD "arch". Return the new vmap. */
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struct vmap *
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map_vmap (bf, arch)
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bfd *bf;
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bfd *arch;
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{
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struct vmap_and_bfd vmap_bfd;
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struct vmap *vp, **vpp;
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vp = (PTR) xmalloc (sizeof (*vp));
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memset (vp, '\0', sizeof (*vp));
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vp->nxt = 0;
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vp->bfd = bf;
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vp->name = bfd_get_filename (arch ? arch : bf);
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vp->member = arch ? bfd_get_filename (bf) : "";
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vmap_bfd.pbfd = arch;
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vmap_bfd.pvmap = vp;
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bfd_map_over_sections (bf, bfdsec_to_vmap, &vmap_bfd);
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/* find the end of the list, and append. */
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for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt)
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;
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*vpp = vp;
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return vp;
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}
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/* Read or write the exec file.
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Args are address within exec file, address within gdb address-space,
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length, and a flag indicating whether to read or write.
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Result is a length:
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0: We cannot handle this address and length.
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> 0: We have handled N bytes starting at this address.
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(If N == length, we did it all.) We might be able
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to handle more bytes beyond this length, but no
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promises.
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< 0: We cannot handle this address, but if somebody
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else handles (-N) bytes, we can start from there.
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The same routine is used to handle both core and exec files;
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we just tail-call it with more arguments to select between them. */
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int
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xfer_memory (memaddr, myaddr, len, write, target)
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CORE_ADDR memaddr;
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char *myaddr;
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int len;
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int write;
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struct target_ops *target;
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{
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boolean res;
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struct section_table *p;
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CORE_ADDR nextsectaddr, memend;
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boolean (*xfer_fn) PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
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if (len <= 0)
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fatal ("aborting");
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memend = memaddr + len;
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xfer_fn = write? bfd_set_section_contents: bfd_get_section_contents;
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nextsectaddr = memend;
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for (p = target->to_sections; p < target->to_sections_end; p++)
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{
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if (p->addr <= memaddr)
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if (p->endaddr >= memend)
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{
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/* Entire transfer is within this section. */
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res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, memaddr - p->addr, len);
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return (res != 0) ? len : 0;
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}
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else if (p->endaddr <= memaddr)
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{
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/* This section ends before the transfer starts. */
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continue;
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}
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else
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{
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/* This section overlaps the transfer. Just do half. */
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len = p->endaddr - memaddr;
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res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, memaddr - p->addr, len);
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return (res != 0) ? len : 0;
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}
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else if (p->addr < nextsectaddr)
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nextsectaddr = p->addr;
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}
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if (nextsectaddr >= memend)
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return 0; /* We can't help */
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else
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return - (nextsectaddr - memaddr); /* Next boundary where we can help */
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}
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void
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print_section_info (t, abfd)
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struct target_ops *t;
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bfd *abfd;
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{
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struct section_table *p;
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/* FIXME-32x64: Need a version of print_address_numeric with field width. */
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printf_filtered ("\t`%s', ", bfd_get_filename(abfd));
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wrap_here (" ");
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printf_filtered ("file type %s.\n", bfd_get_target(abfd));
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for (p = t->to_sections; p < t->to_sections_end; p++) {
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printf_filtered ("\t%s",
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local_hex_string_custom ((unsigned long) p->addr, "08l"));
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printf_filtered (" - %s",
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local_hex_string_custom ((unsigned long) p->endaddr, "08l"));
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if (info_verbose)
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printf_filtered (" @ %s",
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local_hex_string_custom ((unsigned long) p->the_bfd_section->filepos, "08l"));
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printf_filtered (" is %s", bfd_section_name (p->bfd, p->the_bfd_section));
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if (p->bfd != abfd) {
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printf_filtered (" in %s", bfd_get_filename (p->bfd));
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}
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printf_filtered ("\n");
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}
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}
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static void
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exec_files_info (t)
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struct target_ops *t;
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{
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register struct vmap *vp = vmap;
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print_section_info (t, exec_bfd);
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if (!vp)
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return;
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printf_unfiltered ("\tMapping info for file `%s'.\n", vp->name);
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printf_unfiltered ("\t %8.8s %8.8s %8.8s %8.8s %8.8s %s\n",
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"tstart", "tend", "dstart", "dend", "section", "file(member)");
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for (; vp; vp = vp->nxt)
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printf_unfiltered ("\t0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x %s%s%s%s\n",
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vp->tstart,
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vp->tend,
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vp->dstart,
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vp->dend,
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vp->name,
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*vp->member ? "(" : "",
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vp->member,
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*vp->member ? ")" : "");
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}
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#ifdef DAMON
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/* Damon's implementation of set_section_command! It is based on the sex member
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(which is a section pointer from vmap) of vmap.
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We will not have multiple vmap entries (one for each section), rather transmit
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text and data base offsets and fix them at the same time. Elimination of sex
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entry in vmap make this function obsolute, use the one from exec.c.
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Need further testing!! FIXMEmgo. */
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static void
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set_section_command(args, from_tty)
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char *args;
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{
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register struct vmap *vp = vmap;
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char *secname;
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unsigned seclen;
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unsigned long secaddr;
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char secprint[100];
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long offset;
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|
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if (args == 0)
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error("Must specify section name and its virtual address");
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/* Parse out section name */
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for (secname = args; !isspace(*args); args++)
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;
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seclen = args - secname;
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|
||
/* Parse out new virtual address */
|
||
secaddr = parse_and_eval_address(args);
|
||
|
||
for (vp = vmap; vp; vp = vp->nxt) {
|
||
if (!strncmp(secname
|
||
, bfd_section_name(vp->bfd, vp->sex), seclen)
|
||
&& bfd_section_name(vp->bfd, vp->sex)[seclen] == '\0') {
|
||
offset = secaddr - vp->tstart;
|
||
vp->tstart += offset;
|
||
vp->tend += offset;
|
||
exec_files_info();
|
||
return;
|
||
}
|
||
}
|
||
|
||
if (seclen >= sizeof(secprint))
|
||
seclen = sizeof(secprint) - 1;
|
||
strncpy(secprint, secname, seclen);
|
||
secprint[seclen] = '\0';
|
||
error("Section %s not found", secprint);
|
||
}
|
||
#else
|
||
static void
|
||
set_section_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
struct section_table *p;
|
||
char *secname;
|
||
unsigned seclen;
|
||
unsigned long secaddr;
|
||
char secprint[100];
|
||
long offset;
|
||
|
||
if (args == 0)
|
||
error ("Must specify section name and its virtual address");
|
||
|
||
/* Parse out section name */
|
||
for (secname = args; !isspace(*args); args++) ;
|
||
seclen = args - secname;
|
||
|
||
/* Parse out new virtual address */
|
||
secaddr = parse_and_eval_address (args);
|
||
|
||
for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++)
|
||
if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen)
|
||
&& bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0')
|
||
{
|
||
offset = secaddr - p->addr;
|
||
p->addr += offset;
|
||
p->endaddr += offset;
|
||
if (from_tty)
|
||
exec_files_info (&exec_ops);
|
||
return;
|
||
}
|
||
|
||
if (seclen >= sizeof (secprint))
|
||
seclen = sizeof (secprint) - 1;
|
||
strncpy (secprint, secname, seclen);
|
||
secprint[seclen] = '\0';
|
||
error ("Section %s not found", secprint);
|
||
}
|
||
|
||
#endif /* !DAMON */
|
||
|
||
struct target_ops exec_ops = {
|
||
"exec", "Local exec file",
|
||
"Use an executable file as a target.\n\
|
||
Specify the filename of the executable file.",
|
||
exec_file_command, exec_close, /* open, close */
|
||
find_default_attach, 0, 0, 0, /* attach, detach, resume, wait, */
|
||
0, 0, /* fetch_registers, store_registers, */
|
||
0, /* prepare_to_store */
|
||
xfer_memory, exec_files_info,
|
||
0, 0, /* insert_breakpoint, remove_breakpoint, */
|
||
0, 0, 0, 0, 0, /* terminal stuff */
|
||
0, 0, /* kill, load */
|
||
0, /* lookup sym */
|
||
find_default_create_inferior,
|
||
0, /* mourn_inferior */
|
||
0, /* can_run */
|
||
0, /* notice_signals */
|
||
file_stratum, 0, /* next */
|
||
0, 1, 0, 0, 0, /* all mem, mem, stack, regs, exec */
|
||
0, 0, /* section pointers */
|
||
OPS_MAGIC, /* Always the last thing */
|
||
};
|
||
|
||
void
|
||
_initialize_exec()
|
||
{
|
||
|
||
add_com("file", class_files, file_command,
|
||
"Use FILE as program to be debugged.\n\
|
||
It is read for its symbols, for getting the contents of pure memory,\n\
|
||
and it is the program executed when you use the `run' command.\n\
|
||
If FILE cannot be found as specified, your execution directory path\n\
|
||
($PATH) is searched for a command of that name.\n\
|
||
No arg means to have no executable file and no symbols.");
|
||
|
||
add_com("exec-file", class_files, exec_file_command,
|
||
"Use FILE as program for getting contents of pure memory.\n\
|
||
If FILE cannot be found as specified, your execution directory path\n\
|
||
is searched for a command of that name.\n\
|
||
No arg means have no executable file.");
|
||
|
||
add_com("section", class_files, set_section_command,
|
||
"Change the base address of section SECTION of the exec file to ADDR.\n\
|
||
This can be used if the exec file does not contain section addresses,\n\
|
||
(such as in the a.out format), or when the addresses specified in the\n\
|
||
file itself are wrong. Each section must be changed separately. The\n\
|
||
``info files'' command lists all the sections and their addresses.");
|
||
|
||
add_target(&exec_ops);
|
||
}
|