projects / binutils.git / blame
| Commit | Line | Data |
|---|---|---|
| 9d872871 | 1 | /* Macro definitions for GDB on all SVR4 target systems. |
| 7919c3ed JG |
2 | Copyright (C) 1991, 1992, Free Software Foundation, Inc. |
| 3 | Written by Fred Fish at Cygnus Support ([email protected]). | |
| 9d872871 FF |
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 | ||
| 7919c3ed | 21 | #include "solib.h" /* Support for shared libraries. */ |
| dc52fc71 FF |
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) && (strcmp ("_init", name) == 0)) | |
| 23053b80 JG |
36 | |
| 37 | /* In SVR4 ELF files, the ABI defines (pg. 4-25) that "External C symbols | |
| 38 | have the same names in C, assembly code, and object files' symbol | |
| 39 | tables." So... */ | |
| 40 | ||
| 41 | #undef NAMES_HAVE_UNDERSCORE |