| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // Normally gdb and lldb look for a symbol named "_dl_debug_state" in the |
| // interpreter to get notified when the dynamic loader has modified the |
| // list of shared libraries. When using the embeded linker, the debugger is not |
| // aware of the interpreter (PT_INTERP is unset and auxv AT_BASE is 0) so it |
| // doesn't know where to look for the symbol. It falls back to looking in the |
| // executable, so provide a symbol for it to find. The dynamic loader will |
| // need to forward its calls to its own _dl_debug_state symbol to this one. |
| // |
| // This has to be defined in a .c file because lldb looks for a symbol with |
| // DWARF language type DW_LANG_C. |
| extern void _dl_debug_state() { |
| } |
