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1 | /* Macro definitions for GDB on all SVR4 target systems. |
2 | Copyright 1991, 1992, 1993 Free Software Foundation, Inc. | |
3 | Written by Fred Fish at Cygnus Support (fnf@cygnus.com). | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | #include "solib.h" /* Support for shared libraries. */ | |
22 | ||
23 | /* For SVR4 shared libraries, each call to a library routine goes through | |
24 | a small piece of trampoline code in the ".init" section. Although each | |
25 | of these fragments is labeled with the name of the routine being called, | |
26 | the gdb symbol reading code deliberately ignores them so it won't confuse | |
27 | them with the real functions. It does however know about the label that | |
28 | precedes all of the fragments, which is "_init". Thus when we lookup a | |
29 | function that corresponds to a PC value which is in one of the trampoline | |
30 | fragments, we'll appear to be in the function "_init". The following | |
31 | macro will evaluate to nonzero when NAME is valid and matches "_init". | |
32 | The horribly ugly wait_for_inferior() routine uses this macro to detect | |
33 | when we have stepped into one of these fragments. */ | |
34 | ||
35 | #define IN_SOLIB_TRAMPOLINE(pc,name) ((name) && (STREQ ("_init", name))) | |
36 | ||
37 | /* It is unknown which, if any, SVR4 assemblers do not accept dollar signs | |
38 | in identifiers. The default in G++ is to use dots instead, for all SVR4 | |
39 | systems, so we make that our default also. FIXME: There should be some | |
40 | way to get G++ to tell us what CPLUS_MARKER it is using, perhaps by | |
41 | stashing it in the debugging information as part of the name of an | |
42 | invented symbol ("gcc_cplus_marker$" for example). */ | |
43 | ||
44 | #undef CPLUS_MARKER | |
45 | #define CPLUS_MARKER '.' |