52 lines
2.4 KiB
C
52 lines
2.4 KiB
C
/* Macro definitions for GDB on all SVR4 target systems.
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Copyright (C) 1991, 1992, Free Software Foundation, Inc.
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Written by Fred Fish at Cygnus Support (fnf@cygnus.com).
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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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#include "solib.h" /* Support for shared libraries. */
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/* For SVR4 shared libraries, each call to a library routine goes through
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a small piece of trampoline code in the ".init" section. Although each
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of these fragments is labeled with the name of the routine being called,
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the gdb symbol reading code deliberately ignores them so it won't confuse
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them with the real functions. It does however know about the label that
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precedes all of the fragments, which is "_init". Thus when we lookup a
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function that corresponds to a PC value which is in one of the trampoline
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fragments, we'll appear to be in the function "_init". The following
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macro will evaluate to nonzero when NAME is valid and matches "_init".
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The horribly ugly wait_for_inferior() routine uses this macro to detect
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when we have stepped into one of these fragments. */
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#define IN_SOLIB_TRAMPOLINE(pc,name) ((name) && (STREQ ("_init", name)))
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/* In SVR4 ELF files, the ABI defines (pg. 4-25) that "External C symbols
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have the same names in C, assembly code, and object files' symbol
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tables." So... */
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#undef NAMES_HAVE_UNDERSCORE
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/* It is unknown which, if any, SVR4 assemblers do not accept dollar signs
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in identifiers. The default in G++ is to use dots instead, for all SVR4
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systems, so we make that our default also. FIXME: There should be some
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way to get G++ to tell us what CPLUS_MARKER it is using, perhaps by
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stashing it in the debugging information as part of the name of an
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invented symbol ("gcc_cplus_marker$" for example). */
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#undef CPLUS_MARKER
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#define CPLUS_MARKER '.'
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