projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 4d6acc61 RM |
1 | /* Communicate dynamic linker state to the debugger at runtime. |
| 2 | Copyright (C) 1996 Free Software Foundation, Inc. | |
| 3 | This file is part of the GNU C Library. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Library General Public License as | |
| 7 | published by the Free Software Foundation; either version 2 of the | |
| 8 | License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Library General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Library General Public | |
| 16 | License along with the GNU C Library; see the file COPYING.LIB. If | |
| 17 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
| 18 | Cambridge, MA 02139, USA. */ | |
| 19 | ||
| 20 | #include <link.h> | |
| 21 | ||
| 22 | /* This structure communicates dl state to the debugger. The debugger | |
| 23 | normally finds it via the DT_DEBUG entry in the dynamic section, but in | |
| 24 | a statically-linked program there is no dynamic section for the debugger | |
| 25 | to examine and it looks for this particular symbol name. */ | |
| 26 | struct r_debug _r_debug; | |
| 27 | ||
| 28 | ||
| 29 | /* Initialize _r_debug if it has not already been done. The argument is | |
| 30 | the run-time load address of the dynamic linker, to be put in | |
| 31 | _r_debug.r_ldbase. Returns the address of _r_debug. */ | |
| 32 | ||
| 33 | struct r_debug * | |
| 34 | _dl_debug_initialize (ElfW(Addr) ldbase) | |
| 35 | { | |
| 36 | if (_r_debug.r_brk == 0) | |
| 37 | { | |
| 38 | /* Tell the debugger where to find the map of loaded objects. */ | |
| 39 | _r_debug.r_version = 1 /* R_DEBUG_VERSION XXX */; | |
| 8a594e3c | 40 | _r_debug.r_ldbase = ldbase; |
| 4d6acc61 RM |
41 | _r_debug.r_map = _dl_loaded; |
| 42 | _r_debug.r_brk = (ElfW(Addr)) &_dl_debug_state; | |
| 43 | } | |
| 44 | ||
| 45 | return &_r_debug; | |
| 46 | } | |
| 47 | ||
| 48 | ||
| 49 | /* This function exists solely to have a breakpoint set on it by the | |
| 50 | debugger. The debugger is supposed to find this function's address by | |
| 51 | examining the r_brk member of struct r_debug, but GDB 4.15 in fact looks | |
| 52 | for this particular symbol name in the PT_INTERP file. */ | |
| 53 | void | |
| 54 | _dl_debug_state (void) | |
| 55 | { | |
| 56 | } |