1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef _DWARF_AUX_H 3 #define _DWARF_AUX_H 4 /* 5 * dwarf-aux.h : libdw auxiliary interfaces 6 */ 7 8 #include <dwarf.h> 9 #include <elfutils/libdw.h> 10 #include <elfutils/libdwfl.h> 11 #include <elfutils/version.h> 12 13 struct strbuf; 14 15 /* Find the realpath of the target file */ 16 const char *cu_find_realpath(Dwarf_Die *cu_die, const char *fname); 17 18 /* Get DW_AT_comp_dir (should be NULL with older gcc) */ 19 const char *cu_get_comp_dir(Dwarf_Die *cu_die); 20 21 /* Get a line number and file name for given address */ 22 int cu_find_lineinfo(Dwarf_Die *cudie, Dwarf_Addr addr, 23 const char **fname, int *lineno); 24 25 /* Walk on functions at given address */ 26 int cu_walk_functions_at(Dwarf_Die *cu_die, Dwarf_Addr addr, 27 int (*callback)(Dwarf_Die *, void *), void *data); 28 29 /* Get DW_AT_linkage_name (should be NULL for C binary) */ 30 const char *die_get_linkage_name(Dwarf_Die *dw_die); 31 32 /* Get the lowest PC in DIE (including range list) */ 33 int die_entrypc(Dwarf_Die *dw_die, Dwarf_Addr *addr); 34 35 /* Ensure that this DIE is a subprogram and definition (not declaration) */ 36 bool die_is_func_def(Dwarf_Die *dw_die); 37 38 /* Ensure that this DIE is an instance of a subprogram */ 39 bool die_is_func_instance(Dwarf_Die *dw_die); 40 41 /* Compare diename and tname */ 42 bool die_compare_name(Dwarf_Die *dw_die, const char *tname); 43 44 /* Matching diename with glob pattern */ 45 bool die_match_name(Dwarf_Die *dw_die, const char *glob); 46 47 /* Get callsite line number of inline-function instance */ 48 int die_get_call_lineno(Dwarf_Die *in_die); 49 50 /* Get callsite file name of inlined function instance */ 51 const char *die_get_call_file(Dwarf_Die *in_die); 52 53 /* Get type die */ 54 Dwarf_Die *die_get_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem); 55 56 /* Get a type die, but skip qualifiers and typedef */ 57 Dwarf_Die *die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem); 58 59 /* Check whether the DIE is signed or not */ 60 bool die_is_signed_type(Dwarf_Die *tp_die); 61 62 /* Get data_member_location offset */ 63 int die_get_data_member_location(Dwarf_Die *mb_die, Dwarf_Word *offs); 64 65 /* Return values for die_find_child() callbacks */ 66 enum { 67 DIE_FIND_CB_END = 0, /* End of Search */ 68 DIE_FIND_CB_CHILD = 1, /* Search only children */ 69 DIE_FIND_CB_SIBLING = 2, /* Search only siblings */ 70 DIE_FIND_CB_CONTINUE = 3, /* Search children and siblings */ 71 }; 72 73 /* Search child DIEs */ 74 Dwarf_Die *die_find_child(Dwarf_Die *rt_die, 75 int (*callback)(Dwarf_Die *, void *), 76 void *data, Dwarf_Die *die_mem); 77 78 /* Search a non-inlined function including given address */ 79 Dwarf_Die *die_find_realfunc(Dwarf_Die *cu_die, Dwarf_Addr addr, 80 Dwarf_Die *die_mem); 81 82 /* Search a non-inlined function with tail call at given address */ 83 Dwarf_Die *die_find_tailfunc(Dwarf_Die *cu_die, Dwarf_Addr addr, 84 Dwarf_Die *die_mem); 85 86 /* Search the top inlined function including given address */ 87 Dwarf_Die *die_find_top_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr, 88 Dwarf_Die *die_mem); 89 90 /* Search the deepest inlined function including given address */ 91 Dwarf_Die *die_find_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr, 92 Dwarf_Die *die_mem); 93 94 /* Walk on the instances of given DIE */ 95 int die_walk_instances(Dwarf_Die *in_die, 96 int (*callback)(Dwarf_Die *, void *), void *data); 97 98 /* Walker on lines (Note: line number will not be sorted) */ 99 typedef int (* line_walk_callback_t) (const char *fname, int lineno, 100 Dwarf_Addr addr, void *data); 101 102 /* 103 * Walk on lines inside given DIE. If the DIE is a subprogram, walk only on 104 * the lines inside the subprogram, otherwise the DIE must be a CU DIE. 105 */ 106 int die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback, void *data); 107 108 /* Find a variable called 'name' at given address */ 109 Dwarf_Die *die_find_variable_at(Dwarf_Die *sp_die, const char *name, 110 Dwarf_Addr addr, Dwarf_Die *die_mem); 111 112 /* Find a member called 'name' */ 113 Dwarf_Die *die_find_member(Dwarf_Die *st_die, const char *name, 114 Dwarf_Die *die_mem); 115 116 /* Get the name of given variable DIE */ 117 int die_get_typename(Dwarf_Die *vr_die, struct strbuf *buf); 118 119 /* Get the name and type of given variable DIE, stored as "type\tname" */ 120 int die_get_varname(Dwarf_Die *vr_die, struct strbuf *buf); 121 int die_get_var_range(Dwarf_Die *sp_die, Dwarf_Die *vr_die, struct strbuf *buf); 122 123 /* Check if target program is compiled with optimization */ 124 bool die_is_optimized_target(Dwarf_Die *cu_die); 125 126 /* Use next address after prologue as probe location */ 127 void die_skip_prologue(Dwarf_Die *sp_die, Dwarf_Die *cu_die, 128 Dwarf_Addr *entrypc); 129 130 #endif 131