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authorStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
committerStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
commit14cd51f7793a9ce07bc435069f57269450141363 (patch)
tree280a2da48f771d61be5b451ddbacdf9ef8e9ad13 /gdb/coff-solib.c
downloadgdb-14cd51f7793a9ce07bc435069f57269450141363.tar.gz
Initial revision
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diff --git a/gdb/coff-solib.c b/gdb/coff-solib.c
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+/* Handle COFF SVR3 shared libraries for GDB, the GNU Debugger.
+ Copyright 1993 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+
+#include "defs.h"
+
+#include "frame.h"
+#include "bfd.h"
+#include "gdbcore.h"
+#include "symtab.h"
+
+/*
+
+GLOBAL FUNCTION
+
+ coff_solib_add -- add a shared library files to the symtab list. We
+ examine the `.lib' section of the exec file and determine the names of
+ the shared libraries.
+
+ This function is responsible for discovering those names and
+ addresses, and saving sufficient information about them to allow
+ their symbols to be read at a later time.
+
+SYNOPSIS
+
+ void coff_solib_add (char *arg_string, int from_tty,
+ struct target_ops *target)
+
+DESCRIPTION
+
+*/
+
+void
+coff_solib_add (arg_string, from_tty, target)
+ char *arg_string;
+ int from_tty;
+ struct target_ops *target;
+{
+ asection *libsect;
+
+ libsect = bfd_get_section_by_name (exec_bfd, ".lib");
+
+ if (libsect)
+ {
+ int libsize;
+ unsigned char *lib;
+ struct libent
+ {
+ bfd_byte len[4];
+ bfd_byte nameoffset[4];
+ };
+
+ libsize = bfd_section_size (exec_bfd, libsect);
+
+ lib = (unsigned char *) alloca (libsize);
+
+ bfd_get_section_contents (exec_bfd, libsect, lib, 0, libsize);
+
+ while (libsize > 0)
+ {
+ struct libent *ent;
+ struct objfile *objfile;
+ int len, nameoffset;
+ char *filename;
+
+ ent = (struct libent *)lib;
+
+ len = bfd_get_32 (exec_bfd, ent->len);
+
+ nameoffset = bfd_get_32 (exec_bfd, ent->nameoffset);
+
+ if (len <= 0)
+ break;
+
+ filename = (char *)ent + nameoffset * 4;
+
+ objfile = symbol_file_add (filename, from_tty,
+ 0, /* addr */
+ 0, /* not mainline */
+ 0, /* not mapped */
+ 0, /* Not readnow */
+ 0, /* Not user loaded */
+ 1); /* Is a solib */
+
+ libsize -= len * 4;
+ lib += len * 4;
+ }
+
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+ reinit_frame_cache ();
+ }
+}
+
+/*
+
+GLOBAL FUNCTION
+
+ coff_solib_create_inferior_hook -- shared library startup support
+
+SYNOPSIS
+
+ void coff_solib_create_inferior_hook()
+
+DESCRIPTION
+
+ When gdb starts up the inferior, the kernel maps in the shared
+ libraries. We get here with the target stopped at it's first
+ instruction, and the libraries already mapped. At this point, this
+ function gets called via expansion of the macro
+ SOLIB_CREATE_INFERIOR_HOOK.
+ */
+
+void
+coff_solib_create_inferior_hook()
+{
+ coff_solib_add ((char *) 0, 0, (struct target_ops *) 0);
+}