Mike Dodd | 8cfa702 | 2010-11-17 11:12:26 -0800 | [diff] [blame^] | 1 | /** |
| 2 | * @file opd_mapping.h |
| 3 | * Management of process mappings |
| 4 | * |
| 5 | * @remark Copyright 2002 OProfile authors |
| 6 | * @remark Read the file COPYING |
| 7 | * |
| 8 | * @author John Levon |
| 9 | * @author Philippe Elie |
| 10 | */ |
| 11 | |
| 12 | #ifndef OPD_MAPPING_H |
| 13 | #define OPD_MAPPING_H |
| 14 | |
| 15 | #include "op_list.h" |
| 16 | |
| 17 | struct opd_image; |
| 18 | struct opd_proc; |
| 19 | struct op_note; |
| 20 | |
| 21 | /** |
| 22 | * represent a mmap'ed area, we create such area only for vma area with exec |
| 23 | * access right |
| 24 | */ |
| 25 | struct opd_map { |
| 26 | /** next mapping for this image */ |
| 27 | struct list_head next; |
| 28 | /** owning image */ |
| 29 | struct opd_image * image; |
| 30 | /** mapping start vma */ |
| 31 | unsigned long start; |
| 32 | /** mapping offset */ |
| 33 | unsigned long offset; |
| 34 | /** mapping end vma */ |
| 35 | unsigned long end; |
| 36 | }; |
| 37 | |
| 38 | /** |
| 39 | * opd_init_hash_map - initialise the hashmap |
| 40 | */ |
| 41 | void opd_init_hash_map(void); |
| 42 | |
| 43 | /** |
| 44 | * op_cleanup_hash_name |
| 45 | * |
| 46 | * release resource owned by hash_name array |
| 47 | */ |
| 48 | void opd_cleanup_hash_name(void); |
| 49 | |
| 50 | /** |
| 51 | * opd_handle_mapping - deal with mapping notification |
| 52 | * @param note mapping notification |
| 53 | * |
| 54 | * Deal with one notification that a process has mapped |
| 55 | * in a new executable file. The mapping information is |
| 56 | * added to the process structure. |
| 57 | */ |
| 58 | void opd_handle_mapping(struct op_note const * note); |
| 59 | |
| 60 | /** |
| 61 | * opd_put_mapping - add a mapping to a process |
| 62 | * @param proc process to add map to |
| 63 | * @param image mapped image pointer |
| 64 | * @param start start of mapping |
| 65 | * @param offset file offset of mapping |
| 66 | * @param end end of mapping |
| 67 | * |
| 68 | * Add the mapping specified to the process proc growing the maps array |
| 69 | * if necessary. |
| 70 | */ |
| 71 | void opd_add_mapping(struct opd_proc * proc, struct opd_image * image, |
| 72 | unsigned long start, unsigned long offset, unsigned long end); |
| 73 | |
| 74 | /** |
| 75 | * opd_kill_maps - delete mapping information for a process |
| 76 | * @param proc process to work on |
| 77 | * |
| 78 | * Frees structures holding mapping information |
| 79 | */ |
| 80 | void opd_kill_maps(struct opd_proc * proc); |
| 81 | |
| 82 | /** |
| 83 | * opd_is_in_map - check whether an EIP is within a mapping |
| 84 | * @param map map to check |
| 85 | * @param eip EIP value |
| 86 | * |
| 87 | * Return %1 if the EIP value @eip is within the boundaries |
| 88 | * of the map @map, %0 otherwise. |
| 89 | */ |
| 90 | inline static int opd_is_in_map(struct opd_map * map, unsigned long eip) |
| 91 | { |
| 92 | return (eip >= map->start && eip < map->end); |
| 93 | } |
| 94 | |
| 95 | |
| 96 | /* |
| 97 | * opd_map_offset - return offset of sample against map |
| 98 | * @param map map to use |
| 99 | * @param eip EIP value to use |
| 100 | * |
| 101 | * Returns the offset of the EIP value @eip into |
| 102 | * the map @map, which is the same as the file offset |
| 103 | * for the relevant binary image. |
| 104 | */ |
| 105 | inline static unsigned long opd_map_offset(struct opd_map * map, |
| 106 | unsigned long eip) |
| 107 | { |
| 108 | return (eip - map->start) + map->offset; |
| 109 | } |
| 110 | |
| 111 | #endif /* OPD_MAPPING_H */ |