235 lines
7.6 KiB
C
235 lines
7.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _DWARF_AUX_H
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#define _DWARF_AUX_H
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/*
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* dwarf-aux.h : libdw auxiliary interfaces
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*/
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#include <dwarf.h>
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#include <elfutils/libdw.h>
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#include <elfutils/libdwfl.h>
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#include <elfutils/version.h>
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#include <errno.h>
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struct strbuf;
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/* Find the realpath of the target file */
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const char *cu_find_realpath(Dwarf_Die *cu_die, const char *fname);
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/* Get DW_AT_comp_dir (should be NULL with older gcc) */
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const char *cu_get_comp_dir(Dwarf_Die *cu_die);
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/* Get a line number and file name for given address */
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int cu_find_lineinfo(Dwarf_Die *cudie, Dwarf_Addr addr,
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const char **fname, int *lineno);
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/* Walk on functions at given address */
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int cu_walk_functions_at(Dwarf_Die *cu_die, Dwarf_Addr addr,
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int (*callback)(Dwarf_Die *, void *), void *data);
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/* Get DW_AT_linkage_name (should be NULL for C binary) */
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const char *die_get_linkage_name(Dwarf_Die *dw_die);
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/* Get the lowest PC in DIE (including range list) */
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int die_entrypc(Dwarf_Die *dw_die, Dwarf_Addr *addr);
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/* Ensure that this DIE is a subprogram and definition (not declaration) */
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bool die_is_func_def(Dwarf_Die *dw_die);
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/* Ensure that this DIE is an instance of a subprogram */
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bool die_is_func_instance(Dwarf_Die *dw_die);
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/* Compare diename and tname */
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bool die_compare_name(Dwarf_Die *dw_die, const char *tname);
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/* Matching diename with glob pattern */
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bool die_match_name(Dwarf_Die *dw_die, const char *glob);
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/* Get callsite line number of inline-function instance */
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int die_get_call_lineno(Dwarf_Die *in_die);
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/* Get callsite file name of inlined function instance */
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const char *die_get_call_file(Dwarf_Die *in_die);
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/* Get declared file name of a DIE */
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const char *die_get_decl_file(Dwarf_Die *dw_die);
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/* Get type die */
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Dwarf_Die *die_get_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
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/* Get a type die, but skip qualifiers */
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Dwarf_Die *__die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
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/* Get a type die, but skip qualifiers and typedef */
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Dwarf_Die *die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
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/* Check whether the DIE is signed or not */
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bool die_is_signed_type(Dwarf_Die *tp_die);
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/* Get data_member_location offset */
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int die_get_data_member_location(Dwarf_Die *mb_die, Dwarf_Word *offs);
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/* Return values for die_find_child() callbacks */
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enum {
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DIE_FIND_CB_END = 0, /* End of Search */
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DIE_FIND_CB_CHILD = 1, /* Search only children */
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DIE_FIND_CB_SIBLING = 2, /* Search only siblings */
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DIE_FIND_CB_CONTINUE = 3, /* Search children and siblings */
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};
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/* Search child DIEs */
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Dwarf_Die *die_find_child(Dwarf_Die *rt_die,
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int (*callback)(Dwarf_Die *, void *),
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void *data, Dwarf_Die *die_mem);
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/* Search a non-inlined function including given address */
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Dwarf_Die *die_find_realfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
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Dwarf_Die *die_mem);
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/* Search a non-inlined function with tail call at given address */
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Dwarf_Die *die_find_tailfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
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Dwarf_Die *die_mem);
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/* Search the top inlined function including given address */
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Dwarf_Die *die_find_top_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
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Dwarf_Die *die_mem);
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/* Search the deepest inlined function including given address */
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Dwarf_Die *die_find_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
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Dwarf_Die *die_mem);
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/* Search a non-inlined function by name and returns its return type */
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Dwarf_Die *die_find_func_rettype(Dwarf_Die *sp_die, const char *name,
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Dwarf_Die *die_mem);
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/* Walk on the instances of given DIE */
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int die_walk_instances(Dwarf_Die *in_die,
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int (*callback)(Dwarf_Die *, void *), void *data);
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/* Walker on lines (Note: line number will not be sorted) */
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typedef int (* line_walk_callback_t) (const char *fname, int lineno,
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Dwarf_Addr addr, void *data);
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/*
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* Walk on lines inside given DIE. If the DIE is a subprogram, walk only on
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* the lines inside the subprogram, otherwise the DIE must be a CU DIE.
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*/
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int die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback, void *data);
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/* Find a variable called 'name' at given address */
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Dwarf_Die *die_find_variable_at(Dwarf_Die *sp_die, const char *name,
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Dwarf_Addr addr, Dwarf_Die *die_mem);
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/* Find a member called 'name' */
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Dwarf_Die *die_find_member(Dwarf_Die *st_die, const char *name,
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Dwarf_Die *die_mem);
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/* Get the name of given type DIE */
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int die_get_typename_from_type(Dwarf_Die *type_die, struct strbuf *buf);
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/* Get the name of given variable DIE */
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int die_get_typename(Dwarf_Die *vr_die, struct strbuf *buf);
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/* Get the name and type of given variable DIE, stored as "type\tname" */
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int die_get_varname(Dwarf_Die *vr_die, struct strbuf *buf);
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/* Check if target program is compiled with optimization */
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bool die_is_optimized_target(Dwarf_Die *cu_die);
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/* Use next address after prologue as probe location */
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void die_skip_prologue(Dwarf_Die *sp_die, Dwarf_Die *cu_die,
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Dwarf_Addr *entrypc);
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/* Get the list of including scopes */
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int die_get_scopes(Dwarf_Die *cu_die, Dwarf_Addr pc, Dwarf_Die **scopes);
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/* Variable type information */
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struct die_var_type {
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struct die_var_type *next;
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u64 die_off;
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u64 addr;
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int reg;
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int offset;
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};
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/* Return type info of a member at offset */
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Dwarf_Die *die_get_member_type(Dwarf_Die *type_die, int offset, Dwarf_Die *die_mem);
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/* Return type info where the pointer and offset point to */
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Dwarf_Die *die_deref_ptr_type(Dwarf_Die *ptr_die, int offset, Dwarf_Die *die_mem);
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#ifdef HAVE_DWARF_GETLOCATIONS_SUPPORT
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/* Get byte offset range of given variable DIE */
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int die_get_var_range(Dwarf_Die *sp_die, Dwarf_Die *vr_die, struct strbuf *buf);
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/* Find a variable saved in the 'reg' at given address */
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Dwarf_Die *die_find_variable_by_reg(Dwarf_Die *sc_die, Dwarf_Addr pc, int reg,
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int *poffset, bool is_fbreg,
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Dwarf_Die *die_mem);
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/* Find a (global) variable located in the 'addr' */
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Dwarf_Die *die_find_variable_by_addr(Dwarf_Die *sc_die, Dwarf_Addr addr,
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Dwarf_Die *die_mem, int *offset);
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/* Save all variables and parameters in this scope */
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void die_collect_vars(Dwarf_Die *sc_die, struct die_var_type **var_types);
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/* Save all global variables in this CU */
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void die_collect_global_vars(Dwarf_Die *cu_die, struct die_var_type **var_types);
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#else /* HAVE_DWARF_GETLOCATIONS_SUPPORT */
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static inline int die_get_var_range(Dwarf_Die *sp_die __maybe_unused,
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Dwarf_Die *vr_die __maybe_unused,
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struct strbuf *buf __maybe_unused)
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{
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return -ENOTSUP;
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}
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static inline Dwarf_Die *die_find_variable_by_reg(Dwarf_Die *sc_die __maybe_unused,
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Dwarf_Addr pc __maybe_unused,
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int reg __maybe_unused,
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int *poffset __maybe_unused,
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bool is_fbreg __maybe_unused,
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Dwarf_Die *die_mem __maybe_unused)
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{
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return NULL;
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}
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static inline Dwarf_Die *die_find_variable_by_addr(Dwarf_Die *sc_die __maybe_unused,
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Dwarf_Addr addr __maybe_unused,
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Dwarf_Die *die_mem __maybe_unused,
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int *offset __maybe_unused)
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{
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return NULL;
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}
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static inline void die_collect_vars(Dwarf_Die *sc_die __maybe_unused,
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struct die_var_type **var_types __maybe_unused)
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{
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}
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static inline void die_collect_global_vars(Dwarf_Die *cu_die __maybe_unused,
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struct die_var_type **var_types __maybe_unused)
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{
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}
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#endif /* HAVE_DWARF_GETLOCATIONS_SUPPORT */
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#ifdef HAVE_DWARF_CFI_SUPPORT
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/* Get the frame base information from CFA */
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int die_get_cfa(Dwarf *dwarf, u64 pc, int *preg, int *poffset);
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#else /* HAVE_DWARF_CFI_SUPPORT */
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static inline int die_get_cfa(Dwarf *dwarf __maybe_unused, u64 pc __maybe_unused,
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int *preg __maybe_unused, int *poffset __maybe_unused)
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{
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return -1;
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}
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#endif /* HAVE_DWARF_CFI_SUPPORT */
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#endif /* _DWARF_AUX_H */
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