cbf15d9a3d
char of env value if an '=' appears in it. Bug report and fix by Mark Jungerman, <maj@lucid.com>. Thu Nov 5 23:04:38 1992 Rob Ryan (rr2b@andrew.cmu.edu) * xcoffexec.c (vmap_symtab): fixed a bug where if a object has no member, and the stat pointer passed to vmap_symtab was NULL, the wrong vmap entries would be modified. Fixes behavior where attempting to load symbols for a module with no member would mess up already read in symbols.
1038 lines
27 KiB
C
1038 lines
27 KiB
C
/* Execute AIXcoff files, for GDB.
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Copyright 1988, 1989, 1991, 1992 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 <sys/ldr.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 "symfile.h"
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#include "objfiles.h"
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#include "libbfd.h" /* BFD internals (sigh!) FIXME */
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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 section_table *exec_sections, *exec_sections_end;
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#define eq(s0, s1) !strcmp(s0, s1)
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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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extern struct objfile *lookup_objfile_bfd ();
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#if 0
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/*
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* the vmap struct is used to describe the virtual address space of
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* the target we are manipulating. The first entry is always the "exec"
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* file. Subsequent entries correspond to other objects that are
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* mapped into the address space of a process created from the "exec" file.
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* These are either in response to exec()ing the file, in which case all
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* shared libraries are loaded, or a "load" system call, followed by the
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* user's issuance of a "load" command.
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*/
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struct vmap {
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struct vmap *nxt; /* ^ to next in chain */
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bfd *bfd; /* BFD for mappable object library */
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char *name; /* ^ to object file name */
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char *member; /* ^ to member name */
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CORE_ADDR tstart; /* virtual addr where member is mapped */
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CORE_ADDR tend; /* virtual upper bound of member */
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CORE_ADDR tadj; /* heuristically derived adjustment */
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CORE_ADDR dstart; /* virtual address of data start */
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CORE_ADDR dend; /* vitrual address of data end */
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};
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struct vmap_and_bfd {
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bfd *pbfd;
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struct vmap *pvmap;
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};
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static struct vmap *vmap; /* current vmap */
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#endif /* 0 */
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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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{
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register struct vmap *vp, *nxt;
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struct objfile *obj;
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for (nxt = vmap; vp = nxt; )
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{
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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 (obj = lookup_objfile_bfd (vp->bfd))
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free_objfile (obj);
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else
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bfd_close(vp->bfd);
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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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if (exec_bfd) {
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bfd_close (exec_bfd);
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exec_bfd = NULL;
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}
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if (exec_ops.to_sections) {
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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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}
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/*
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* exec_file_command - handle the "exec" command, &c.
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*/
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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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{
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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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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, NULL, 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_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.",
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scratch_pathname, bfd_errmsg(bfd_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",
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exec_bfd->filename, bfd_errmsg(bfd_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",
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exec_bfd->filename, bfd_errmsg (bfd_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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exec_close(0); /* just in case */
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if (from_tty)
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printf("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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*/
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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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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)->sec_ptr = 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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abort(); /* 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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abort();
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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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/*
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* lookup_symtab_bfd - find if we currently have any symbol tables from bfd
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*/
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struct objfile *
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lookup_objfile_bfd(bfd *bfd) {
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register struct objfile *s;
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for (s = object_files; s; s = s->next)
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if (s->obfd == bfd)
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return s;
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return 0;
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}
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void
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sex_to_vmap(bfd *bf, sec_ptr sex, struct vmap_and_bfd *vmap_bfd)
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{
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register struct vmap *vp, **vpp;
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register struct symtab *syms;
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bfd *arch = vmap_bfd->pbfd;
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vp = vmap_bfd->pvmap;
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if ((bfd_get_section_flags(bf, sex) & SEC_LOAD) == 0)
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return;
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if (!strcmp(bfd_section_name(bf, sex), ".text")) {
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vp->tstart = 0;
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vp->tend = vp->tstart + bfd_section_size(bf, sex);
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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 = sex->filepos - bfd_section_vma(bf, sex);
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}
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else if (!strcmp(bfd_section_name(bf, sex), ".data")) {
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vp->dstart = 0;
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vp->dend = vp->dstart + bfd_section_size(bf, sex);
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}
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else if (!strcmp(bfd_section_name(bf, sex), ".bss")) /* FIXMEmgo */
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printf ("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". If we have not yet read in symbols for this file, do so. */
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map_vmap (bfd *bf, 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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struct objfile *obj;
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vp = (void*) xmalloc (sizeof (*vp));
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bzero (vp, 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, sex_to_vmap, &vmap_bfd);
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obj = lookup_objfile_bfd (bf);
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if (exec_bfd && !obj) {
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obj = allocate_objfile (bf, 0);
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#if 0
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/* This is only needed if we want to load shared libraries no matter what.
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Since we provide the choice of incremental loading of shared objects
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now, we do not have to load them as default anymore. */
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syms_from_objfile (obj, 0, 0, 0);
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new_symfile_objfile (obj, 0, 0);
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#endif
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}
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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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}
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/* true, if symbol table and minimal symbol table are relocated. */
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int symtab_relocated = 0;
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/* vmap_symtab - handle symbol translation on vmapping */
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vmap_symtab(vp, old_start, vip)
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register struct vmap *vp;
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CORE_ADDR old_start;
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struct stat *vip;
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{
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register struct symtab *s;
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register struct objfile *objfile;
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register struct minimal_symbol *msymbol;
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/*
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* for each symbol table generated from the vp->bfd
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*/
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ALL_OBJFILES (objfile)
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{
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for (s = objfile -> symtabs; s != NULL; s = s -> next) {
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/* skip over if this is not relocatable and doesn't have a line table */
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if (s->nonreloc && !LINETABLE (s))
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continue;
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/* matching the symbol table's BFD and the *vp's BFD is hairy.
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exec_file creates a seperate BFD for possibly the
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same file as symbol_file.FIXME ALL THIS MUST BE RECTIFIED. */
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if (objfile->obfd == vp->bfd) {
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/* if they match, we luck out. */
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;
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} else if (vp->member[0]) {
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/* no match, and member present, not this one. */
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continue;
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} else if (vip) {
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/* No match, and no member. need to be sure.
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If we were given a stat structure, see if the open file
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underlying this BFD matches. */
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struct stat si;
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FILE *io;
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io = bfd_cache_lookup(objfile->obfd);
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if (!io)
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fatal("cannot find BFD's iostream for sym");
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/* see if we are referring to the same file */
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if (fstat(fileno(io), &si) < 0)
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fatal("cannot fstat BFD for sym");
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if ((si.st_dev != vip->st_dev
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|| si.st_ino != vip->st_ino))
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continue;
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} else {
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continue; /* No stat struct: no way to match it */
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}
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if (vp->tstart != old_start) {
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/* Once we find a relocation base address for one of the symtabs
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in this objfile, it will be the same for all symtabs in this
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objfile. Clean this algorithm. FIXME. */
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for (; s; s = s->next)
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if (!s->nonreloc || LINETABLE(s))
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vmap_symtab_1(s, vp, old_start);
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#if 0
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Himm.., recently we nullified trampoline entry names in order not
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to confuse them with real symbols. Appearently this turned into a
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problem, and msymbol vector did not get relocated properly. If
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msymbols have to have non-null names, then we should name
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trampoline entries with empty strings.
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ALL_MSYMBOLS (objfile, msymbol)
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#else
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for (msymbol = objfile->msymbols;
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msymbol->name || msymbol->address; (msymbol)++)
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#endif
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if (msymbol->address < TEXT_SEGMENT_BASE)
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msymbol -> address += vp->tstart - old_start;
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break;
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}
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}
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}
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if (vp->tstart != old_start) {
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/* breakpoints need to be relocated as well. */
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fixup_breakpoints (0, TEXT_SEGMENT_BASE, vp->tstart - old_start);
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}
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symtab_relocated = 1;
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}
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vmap_symtab_1(s, vp, old_start)
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register struct symtab *s;
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register struct vmap *vp;
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CORE_ADDR old_start;
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{
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register int i, j;
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int len, blen;
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register struct linetable *l;
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struct blockvector *bv;
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register struct block *b;
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int depth;
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register ulong reloc, dreloc;
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if ((reloc = vp->tstart - old_start) == 0)
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return;
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dreloc = vp->dstart; /* data relocation */
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/*
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* The line table must be relocated. This is only present for
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* .text sections, so only vp->text type maps need be considered.
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*/
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l = LINETABLE (s);
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if (l) {
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len = l->nitems;
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for (i = 0; i < len; i++)
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l->item[i].pc += reloc;
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}
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/* if this symbol table is not relocatable, only line table should
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be relocated and the rest ignored. */
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if (s->nonreloc)
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return;
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bv = BLOCKVECTOR(s);
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len = BLOCKVECTOR_NBLOCKS(bv);
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for (i = 0; i < len; i++) {
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b = BLOCKVECTOR_BLOCK(bv, i);
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BLOCK_START(b) += reloc;
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BLOCK_END(b) += reloc;
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blen = BLOCK_NSYMS(b);
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for (j = 0; j < blen; j++) {
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register struct symbol *sym;
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sym = BLOCK_SYM(b, j);
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switch (SYMBOL_NAMESPACE(sym)) {
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case STRUCT_NAMESPACE:
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case UNDEF_NAMESPACE:
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continue;
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case LABEL_NAMESPACE:
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case VAR_NAMESPACE:
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break;
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}
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switch (SYMBOL_CLASS(sym)) {
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case LOC_CONST:
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case LOC_CONST_BYTES:
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case LOC_LOCAL:
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case LOC_REGISTER:
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case LOC_ARG:
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case LOC_LOCAL_ARG:
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case LOC_REF_ARG:
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case LOC_REGPARM:
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case LOC_TYPEDEF:
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continue;
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#ifdef FIXME
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case LOC_EXTERNAL:
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#endif
|
|
case LOC_LABEL:
|
|
SYMBOL_VALUE_ADDRESS(sym) += reloc;
|
|
break;
|
|
|
|
case LOC_STATIC:
|
|
SYMBOL_VALUE_ADDRESS(sym) += dreloc;
|
|
break;
|
|
|
|
case LOC_BLOCK:
|
|
break;
|
|
|
|
default:
|
|
fatal("botched symbol class %x"
|
|
, SYMBOL_CLASS(sym));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* add_vmap - add a new vmap entry based on ldinfo() information
|
|
*/
|
|
add_vmap(ldi)
|
|
register struct ld_info *ldi; {
|
|
bfd *bfd, *last;
|
|
register char *mem, *objname;
|
|
|
|
/* This ldi structure was allocated using alloca() in
|
|
xcoff_relocate_symtab(). Now we need to have persistent object
|
|
and member names, so we should save them. */
|
|
|
|
mem = ldi->ldinfo_filename + strlen(ldi->ldinfo_filename) + 1;
|
|
mem = savestring (mem, strlen (mem));
|
|
objname = savestring (ldi->ldinfo_filename, strlen (ldi->ldinfo_filename));
|
|
|
|
bfd = bfd_fdopenr(objname, NULL, ldi->ldinfo_fd);
|
|
if (!bfd)
|
|
error("Could not open `%s' as an executable file: %s",
|
|
objname, bfd_errmsg(bfd_error));
|
|
|
|
|
|
/* make sure we have an object file */
|
|
|
|
if (bfd_check_format(bfd, bfd_object))
|
|
map_vmap (bfd, 0);
|
|
|
|
else if (bfd_check_format(bfd, bfd_archive)) {
|
|
last = 0;
|
|
/*
|
|
* FIXME??? am I tossing BFDs? bfd?
|
|
*/
|
|
while (last = bfd_openr_next_archived_file(bfd, last))
|
|
if (eq(mem, last->filename))
|
|
break;
|
|
|
|
if (!last) {
|
|
bfd_close(bfd);
|
|
/* FIXME -- should be error */
|
|
warning("\"%s\": member \"%s\" missing.", bfd->filename, mem);
|
|
return;
|
|
}
|
|
|
|
if (!bfd_check_format(last, bfd_object)) {
|
|
bfd_close(last); /* XXX??? */
|
|
goto obj_err;
|
|
}
|
|
|
|
map_vmap (last, bfd);
|
|
}
|
|
else {
|
|
obj_err:
|
|
bfd_close(bfd);
|
|
/* FIXME -- should be error */
|
|
warning("\"%s\": not in executable format: %s."
|
|
, objname, bfd_errmsg(bfd_error));
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
/* As well as symbol tables, exec_sections need relocation. After
|
|
the inferior process' termination, there will be a relocated symbol
|
|
table exist with no corresponding inferior process. At that time, we
|
|
need to use `exec' bfd, rather than the inferior process's memory space
|
|
to look up symbols.
|
|
|
|
`exec_sections' need to be relocated only once, as long as the exec
|
|
file remains unchanged.
|
|
*/
|
|
vmap_exec ()
|
|
{
|
|
static bfd *execbfd;
|
|
int i;
|
|
|
|
if (execbfd == exec_bfd)
|
|
return;
|
|
|
|
execbfd = exec_bfd;
|
|
|
|
if (!vmap || !exec_ops.to_sections)
|
|
error ("vmap_exec: vmap or exec_ops.to_sections == 0\n");
|
|
|
|
for (i=0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++)
|
|
{
|
|
if (strcmp(".text", exec_ops.to_sections[i].sec_ptr->name) == 0)
|
|
{
|
|
exec_ops.to_sections[i].addr += vmap->tstart;
|
|
exec_ops.to_sections[i].endaddr += vmap->tstart;
|
|
}
|
|
else if (strcmp(".data", exec_ops.to_sections[i].sec_ptr->name) == 0)
|
|
{
|
|
exec_ops.to_sections[i].addr += vmap->dstart;
|
|
exec_ops.to_sections[i].endaddr += vmap->dstart;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
int
|
|
text_adjustment (abfd)
|
|
bfd *abfd;
|
|
{
|
|
static bfd *execbfd;
|
|
static int adjustment;
|
|
sec_ptr sect;
|
|
|
|
if (exec_bfd == execbfd)
|
|
return adjustment;
|
|
|
|
sect = bfd_get_section_by_name (abfd, ".text");
|
|
if (sect)
|
|
adjustment = sect->filepos - sect->vma;
|
|
else
|
|
adjustment = 0x200; /* just a wild assumption */
|
|
|
|
return adjustment;
|
|
}
|
|
|
|
|
|
/*
|
|
* vmap_ldinfo - update VMAP info with ldinfo() information
|
|
*
|
|
* Input:
|
|
* ldi - ^ to ldinfo() results.
|
|
*/
|
|
vmap_ldinfo(ldi)
|
|
register struct ld_info *ldi;
|
|
{
|
|
struct stat ii, vi;
|
|
register struct vmap *vp;
|
|
register got_one, retried;
|
|
CORE_ADDR ostart;
|
|
|
|
/*
|
|
* for each *ldi, see if we have a corresponding *vp
|
|
* if so, update the mapping, and symbol table.
|
|
* if not, add an entry and symbol table.
|
|
*/
|
|
do {
|
|
char *name = ldi->ldinfo_filename;
|
|
char *memb = name + strlen(name) + 1;
|
|
|
|
retried = 0;
|
|
|
|
if (fstat(ldi->ldinfo_fd, &ii) < 0)
|
|
fatal("cannot fstat(%d) on %s"
|
|
, ldi->ldinfo_fd
|
|
, name);
|
|
retry:
|
|
for (got_one = 0, vp = vmap; vp; vp = vp->nxt) {
|
|
FILE *io;
|
|
|
|
/* First try to find a `vp', which is the same as in ldinfo.
|
|
If not the same, just continue and grep the next `vp'. If same,
|
|
relocate its tstart, tend, dstart, dend values. If no such `vp'
|
|
found, get out of this for loop, add this ldi entry as a new vmap
|
|
(add_vmap) and come back, fins its `vp' and so on... */
|
|
|
|
/* The filenames are not always sufficient to match on. */
|
|
|
|
if ((name[0] == "/" && !eq(name, vp->name))
|
|
|| (memb[0] && !eq(memb, vp->member)))
|
|
continue;
|
|
|
|
io = bfd_cache_lookup(vp->bfd); /* totally opaque! */
|
|
if (!io)
|
|
fatal("cannot find BFD's iostream for %s", vp->name);
|
|
|
|
/* see if we are referring to the same file */
|
|
|
|
if (fstat(fileno(io), &vi) < 0)
|
|
fatal("cannot fstat BFD for %s", vp->name);
|
|
|
|
if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino)
|
|
continue;
|
|
|
|
if (!retried)
|
|
close(ldi->ldinfo_fd);
|
|
|
|
++got_one;
|
|
|
|
/* found a corresponding VMAP. remap! */
|
|
ostart = vp->tstart;
|
|
|
|
vp->tstart = ldi->ldinfo_textorg;
|
|
vp->tend = vp->tstart + ldi->ldinfo_textsize;
|
|
vp->dstart = ldi->ldinfo_dataorg;
|
|
vp->dend = vp->dstart + ldi->ldinfo_datasize;
|
|
|
|
if (vp->tadj) {
|
|
vp->tstart += vp->tadj;
|
|
vp->tend += vp->tadj;
|
|
}
|
|
|
|
/* relocate symbol table(s). */
|
|
vmap_symtab(vp, ostart, &vi);
|
|
|
|
/* there may be more, so we don't break out of the loop. */
|
|
}
|
|
|
|
/* if there was no matching *vp, we must perforce create the sucker(s) */
|
|
if (!got_one && !retried) {
|
|
add_vmap(ldi);
|
|
++retried;
|
|
goto retry;
|
|
}
|
|
} while (ldi->ldinfo_next
|
|
&& (ldi = (void *) (ldi->ldinfo_next + (char *) ldi)));
|
|
|
|
}
|
|
|
|
/*
|
|
* vmap_inferior - print VMAP info for inferior
|
|
*/
|
|
vmap_inferior() {
|
|
|
|
if (inferior_pid == 0)
|
|
return 0; /* normal processing */
|
|
|
|
exec_files_info();
|
|
return 1;
|
|
}
|
|
|
|
/* Read or write the exec file.
|
|
|
|
Args are address within exec file, address within gdb address-space,
|
|
length, and a flag indicating whether to read or write.
|
|
|
|
Result is a length:
|
|
|
|
0: We cannot handle this address and length.
|
|
> 0: We have handled N bytes starting at this address.
|
|
(If N == length, we did it all.) We might be able
|
|
to handle more bytes beyond this length, but no
|
|
promises.
|
|
< 0: We cannot handle this address, but if somebody
|
|
else handles (-N) bytes, we can start from there.
|
|
|
|
The same routine is used to handle both core and exec files;
|
|
we just tail-call it with more arguments to select between them. */
|
|
|
|
int
|
|
xfer_memory (memaddr, myaddr, len, write, target)
|
|
CORE_ADDR memaddr;
|
|
char *myaddr;
|
|
int len;
|
|
int write;
|
|
struct target_ops *target;
|
|
{
|
|
boolean res;
|
|
struct section_table *p;
|
|
CORE_ADDR nextsectaddr, memend;
|
|
boolean (*xfer_fn) PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
|
|
|
|
if (len <= 0)
|
|
abort();
|
|
|
|
memend = memaddr + len;
|
|
xfer_fn = write? bfd_set_section_contents: bfd_get_section_contents;
|
|
nextsectaddr = memend;
|
|
|
|
for (p = target->to_sections; p < target->to_sections_end; p++)
|
|
{
|
|
if (p->addr <= memaddr)
|
|
if (p->endaddr >= memend)
|
|
{
|
|
/* Entire transfer is within this section. */
|
|
res = xfer_fn (p->bfd, p->sec_ptr, myaddr, memaddr - p->addr, len);
|
|
return (res != false)? len: 0;
|
|
}
|
|
else if (p->endaddr <= memaddr)
|
|
{
|
|
/* This section ends before the transfer starts. */
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
/* This section overlaps the transfer. Just do half. */
|
|
len = p->endaddr - memaddr;
|
|
res = xfer_fn (p->bfd, p->sec_ptr, myaddr, memaddr - p->addr, len);
|
|
return (res != false)? len: 0;
|
|
}
|
|
else if (p->addr < nextsectaddr)
|
|
nextsectaddr = p->addr;
|
|
}
|
|
|
|
if (nextsectaddr >= memend)
|
|
return 0; /* We can't help */
|
|
else
|
|
return - (nextsectaddr - memaddr); /* Next boundary where we can help */
|
|
}
|
|
|
|
void
|
|
print_section_info (t, abfd)
|
|
struct target_ops *t;
|
|
bfd *abfd;
|
|
{
|
|
struct section_table *p;
|
|
|
|
printf_filtered ("\t`%s', ", bfd_get_filename(abfd));
|
|
wrap_here (" ");
|
|
printf_filtered ("file type %s.\n", bfd_get_target(abfd));
|
|
|
|
for (p = t->to_sections; p < t->to_sections_end; p++) {
|
|
printf_filtered ("\t%s", local_hex_string_custom (p->addr, "08"));
|
|
printf_filtered (" - %s", local_hex_string_custom (p->endaddr, "08"));
|
|
if (info_verbose)
|
|
printf_filtered (" @ %s",
|
|
local_hex_string_custom (p->sec_ptr->filepos, "08"));
|
|
printf_filtered (" is %s", bfd_section_name (p->bfd, p->sec_ptr));
|
|
if (p->bfd != abfd) {
|
|
printf_filtered (" in %s", bfd_get_filename (p->bfd));
|
|
}
|
|
printf_filtered ("\n");
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
exec_files_info (t)
|
|
struct target_ops *t;
|
|
{
|
|
register struct vmap *vp = vmap;
|
|
|
|
print_section_info (t, exec_bfd);
|
|
|
|
if (!vp)
|
|
return;
|
|
|
|
printf("\tMapping info for file `%s'.\n", vp->name);
|
|
|
|
printf("\t %8.8s %8.8s %8.8s %8.8s %8.8s %s\n",
|
|
"tstart", "tend", "dstart", "dend", "section", "file(member)");
|
|
|
|
for (; vp; vp = vp->nxt)
|
|
printf("\t0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x %s%s%s%s\n",
|
|
vp->tstart,
|
|
vp->tend,
|
|
vp->dstart,
|
|
vp->dend,
|
|
vp->name,
|
|
*vp->member ? "(" : "",
|
|
vp->member,
|
|
*vp->member ? ")" : "");
|
|
}
|
|
|
|
#ifdef DAMON
|
|
/* Damon's implementation of set_section_command! It is based on the sex member
|
|
(which is a section pointer from vmap) of vmap.
|
|
We will not have multiple vmap entries (one for each section), rather transmit
|
|
text and data base offsets and fix them at the same time. Elimination of sex
|
|
entry in vmap make this function obsolute, use the one from exec.c.
|
|
Need further testing!! FIXMEmgo. */
|
|
|
|
static void
|
|
set_section_command(args, from_tty)
|
|
char *args;
|
|
{
|
|
register struct vmap *vp = vmap;
|
|
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 (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->sec_ptr), seclen)
|
|
&& bfd_section_name (exec_bfd, p->sec_ptr)[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);
|
|
}
|