1 /* JIT declarations for GDB, the GNU Debugger. 2 3 Copyright (C) 2009-2013 Free Software Foundation, Inc. 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 3 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, see <http://www.gnu.org/licenses/>. */ 19 20 #ifndef JIT_H 21 #define JIT_H 22 23 /* When the JIT breakpoint fires, the inferior wants us to take one of 24 these actions. These values are used by the inferior, so the 25 values of these enums cannot be changed. */ 26 27 typedef enum 28 { 29 JIT_NOACTION = 0, 30 JIT_REGISTER, 31 JIT_UNREGISTER 32 } jit_actions_t; 33 34 /* This struct describes a single symbol file in a linked list of 35 symbol files describing generated code. As the inferior generates 36 code, it adds these entries to the list, and when we attach to the 37 inferior, we read them all. For the first element prev_entry 38 should be NULL, and for the last element next_entry should be 39 NULL. */ 40 41 struct jit_code_entry 42 { 43 CORE_ADDR next_entry; 44 CORE_ADDR prev_entry; 45 CORE_ADDR symfile_addr; 46 ULONGEST symfile_size; 47 }; 48 49 /* This is the global descriptor that the inferior uses to communicate 50 information to the debugger. To alert the debugger to take an 51 action, the inferior sets the action_flag to the appropriate enum 52 value, updates relevant_entry to point to the relevant code entry, 53 and calls the function at the well-known symbol with our 54 breakpoint. We then read this descriptor from another global 55 well-known symbol. */ 56 57 struct jit_descriptor 58 { 59 uint32_t version; 60 /* This should be jit_actions_t, but we want to be specific about the 61 bit-width. */ 62 uint32_t action_flag; 63 CORE_ADDR relevant_entry; 64 CORE_ADDR first_entry; 65 }; 66 67 /* Looks for the descriptor and registration symbols and breakpoints 68 the registration function. If it finds both, it registers all the 69 already JITed code. If it has already found the symbols, then it 70 doesn't try again. */ 71 72 extern void jit_inferior_created_hook (void); 73 74 /* Re-establish the jit breakpoint(s). */ 75 76 extern void jit_breakpoint_re_set (void); 77 78 /* This function is called by handle_inferior_event when it decides 79 that the JIT event breakpoint has fired. */ 80 81 extern void jit_event_handler (struct gdbarch *gdbarch); 82 83 #endif /* JIT_H */ 84