diff options
Diffstat (limited to 'newlib/libc/sys/linux/dl/dl-debug.c')
-rw-r--r-- | newlib/libc/sys/linux/dl/dl-debug.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/newlib/libc/sys/linux/dl/dl-debug.c b/newlib/libc/sys/linux/dl/dl-debug.c new file mode 100644 index 000000000..5a51b5335 --- /dev/null +++ b/newlib/libc/sys/linux/dl/dl-debug.c @@ -0,0 +1,57 @@ +/* Communicate dynamic linker state to the debugger at runtime. + Copyright (C) 1996, 1998, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <ldsodefs.h> + +/* This structure communicates dl state to the debugger. The debugger + normally finds it via the DT_DEBUG entry in the dynamic section, but in + a statically-linked program there is no dynamic section for the debugger + to examine and it looks for this particular symbol name. */ +struct r_debug _r_debug; + + +/* Initialize _r_debug if it has not already been done. The argument is + the run-time load address of the dynamic linker, to be put in + _r_debug.r_ldbase. Returns the address of _r_debug. */ + +struct r_debug * +internal_function +_dl_debug_initialize (ElfW(Addr) ldbase) +{ + if (_r_debug.r_brk == 0) + { + /* Tell the debugger where to find the map of loaded objects. */ + _r_debug.r_version = 1 /* R_DEBUG_VERSION XXX */; + _r_debug.r_ldbase = ldbase; + _r_debug.r_map = _dl_loaded; + _r_debug.r_brk = (ElfW(Addr)) &_dl_debug_state; + } + + return &_r_debug; +} + + +/* This function exists solely to have a breakpoint set on it by the + debugger. The debugger is supposed to find this function's address by + examining the r_brk member of struct r_debug, but GDB 4.15 in fact looks + for this particular symbol name in the PT_INTERP file. */ +void +_dl_debug_state (void) +{ +} |