1 /* SPDX-License-Identifier: GPL-2.0-or-later */
5 * dwarf-aux.h : libdw auxiliary interfaces
9 #include <elfutils/libdw.h>
10 #include <elfutils/libdwfl.h>
11 #include <elfutils/version.h>
15 /* Find the realpath of the target file */
16 const char *cu_find_realpath(Dwarf_Die *cu_die, const char *fname);
18 /* Get DW_AT_comp_dir (should be NULL with older gcc) */
19 const char *cu_get_comp_dir(Dwarf_Die *cu_die);
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);
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);
29 /* Get DW_AT_linkage_name (should be NULL for C binary) */
30 const char *die_get_linkage_name(Dwarf_Die *dw_die);
32 /* Get the lowest PC in DIE (including range list) */
33 int die_entrypc(Dwarf_Die *dw_die, Dwarf_Addr *addr);
35 /* Ensure that this DIE is a subprogram and definition (not declaration) */
36 bool die_is_func_def(Dwarf_Die *dw_die);
38 /* Ensure that this DIE is an instance of a subprogram */
39 bool die_is_func_instance(Dwarf_Die *dw_die);
41 /* Compare diename and tname */
42 bool die_compare_name(Dwarf_Die *dw_die, const char *tname);
44 /* Matching diename with glob pattern */
45 bool die_match_name(Dwarf_Die *dw_die, const char *glob);
47 /* Get callsite line number of inline-function instance */
48 int die_get_call_lineno(Dwarf_Die *in_die);
50 /* Get callsite file name of inlined function instance */
51 const char *die_get_call_file(Dwarf_Die *in_die);
54 Dwarf_Die *die_get_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
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);
59 /* Check whether the DIE is signed or not */
60 bool die_is_signed_type(Dwarf_Die *tp_die);
62 /* Get data_member_location offset */
63 int die_get_data_member_location(Dwarf_Die *mb_die, Dwarf_Word *offs);
65 /* Return values for die_find_child() callbacks */
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 */
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);
78 /* Search a non-inlined function including given address */
79 Dwarf_Die *die_find_realfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
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,
86 /* Search the top inlined function including given address */
87 Dwarf_Die *die_find_top_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
90 /* Search the deepest inlined function including given address */
91 Dwarf_Die *die_find_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
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);
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);
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.
106 int die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback, void *data);
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);
112 /* Find a member called 'name' */
113 Dwarf_Die *die_find_member(Dwarf_Die *st_die, const char *name,
116 /* Get the name of given variable DIE */
117 int die_get_typename(Dwarf_Die *vr_die, struct strbuf *buf);
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);
123 /* Check if target program is compiled with optimization */
124 bool die_is_optimized_target(Dwarf_Die *cu_die);
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);