#include <linux/types.h>
#include <stdbool.h>
#include <stdint.h>
#include "map.h"
#include "../perf.h"
#include <linux/list.h>
#include <linux/rbtree.h>
#include <stdio.h>
#include <byteswap.h>
#include <libgen.h>
#include "build-id.h"
#include "event.h"
#include "path.h"
#include <elf.h>
#include "dso.h"

Include dependency graph for symbol.h:

Classes
struct	symbol

struct	symbol_conf

struct	symbol_name_rb_node

struct	ref_reloc_sym

struct	map_symbol

struct	addr_map_symbol

struct	branch_info

struct	mem_info

struct	addr_location

struct	symsrc

struct	kcore_extract

struct	sdt_note

Macros
#define	PERF_ELF_C_READ_MMAP ELF_C_READ

#define	DMGL_NO_OPTS 0 /* For readability... */

#define	DMGL_PARAMS (1 << 0) /* Include function args */

#define	DMGL_ANSI (1 << 1) /* Include const, volatile, etc */

#define	DSO__NAME_KALLSYMS "[kernel.kallsyms]"

#define	DSO__NAME_KCORE "[kernel.kcore]"

#define	symbols__for_each_entry(symbols, pos, nd)

#define	symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)

#define	PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"

#define	SYMBOL_A 0

#define	SYMBOL_B 1

#define	SDT_BASE_SCN ".stapsdt.base"

#define	SDT_NOTE_SCN ".note.stapsdt"

#define	SDT_NOTE_TYPE 3

#define	SDT_NOTE_NAME "stapsdt"

#define	NR_ADDR 3

#define	mem_info__zput(mi) __mem_info__zput(&mi)

Typedefs
typedef int(*	mapfn_t) (u64 start, u64 len, u64 pgoff, void *data)

Enumerations
enum	symbol_tag_include { SYMBOL_TAG_INCLUDE__NONE = 0, SYMBOL_TAG_INCLUDE__DEFAULT_ONLY }

Functions
void	symbol__delete (struct symbol *sym)

void	symbols__delete (struct rb_root *symbols)

static size_t	symbol__size (const struct symbol *sym)

static int	__symbol__join_symfs (char bf, size_t size, const char path)

static void *	symbol__priv (struct symbol *sym)

void	symsrc__destroy (struct symsrc *ss)

int	symsrc__init (struct symsrc ss, struct dso dso, const char *name, enum dso_binary_type type)

bool	symsrc__has_symtab (struct symsrc *ss)

bool	symsrc__possibly_runtime (struct symsrc *ss)

int	dso__load (struct dso dso, struct map map)

int	dso__load_vmlinux (struct dso dso, struct map map, const char *vmlinux, bool vmlinux_allocated)

int	dso__load_vmlinux_path (struct dso dso, struct map map)

int	__dso__load_kallsyms (struct dso dso, const char filename, struct map *map, bool no_kcore)

int	dso__load_kallsyms (struct dso dso, const char filename, struct map *map)

void	dso__insert_symbol (struct dso dso, struct symbol sym)

struct symbol *	dso__find_symbol (struct dso *dso, u64 addr)

struct symbol *	dso__find_symbol_by_name (struct dso dso, const char name)

struct symbol *	symbol__next_by_name (struct symbol *sym)

struct symbol *	dso__first_symbol (struct dso *dso)

struct symbol *	dso__last_symbol (struct dso *dso)

struct symbol *	dso__next_symbol (struct symbol *sym)

enum dso_type	dso__type_fd (int fd)

int	filename__read_build_id (const char filename, void bf, size_t size)

int	sysfs__read_build_id (const char filename, void bf, size_t size)

int	modules__parse (const char filename, void arg, int(process_module)(void arg, const char *name, u64 start, u64 size))

int	filename__read_debuglink (const char filename, char debuglink, size_t size)

int	symbol__init (struct perf_env *env)

void	symbol__exit (void)

void	symbol__elf_init (void)

int	symbol__annotation_init (void)

struct symbol *	symbol__new (u64 start, u64 len, u8 binding, u8 type, const char *name)

size_t	__symbol__fprintf_symname_offs (const struct symbol sym, const struct addr_location al, bool unknown_as_addr, bool print_offsets, FILE *fp)

size_t	symbol__fprintf_symname_offs (const struct symbol sym, const struct addr_location al, FILE *fp)

size_t	__symbol__fprintf_symname (const struct symbol sym, const struct addr_location al, bool unknown_as_addr, FILE *fp)

size_t	symbol__fprintf_symname (const struct symbol sym, FILE fp)

size_t	symbol__fprintf (struct symbol sym, FILE fp)

bool	symbol__restricted_filename (const char filename, const char restricted_filename)

int	symbol__config_symfs (const struct option opt __maybe_unused, const char dir, int unset __maybe_unused)

int	dso__load_sym (struct dso dso, struct map map, struct symsrc syms_ss, struct symsrc runtime_ss, int kmodule)

int	dso__synthesize_plt_symbols (struct dso dso, struct symsrc ss)

char *	dso__demangle_sym (struct dso dso, int kmodule, const char elf_name)

void	__symbols__insert (struct rb_root symbols, struct symbol sym, bool kernel)

void	symbols__insert (struct rb_root symbols, struct symbol sym)

void	symbols__fixup_duplicate (struct rb_root *symbols)

void	symbols__fixup_end (struct rb_root *symbols)

void	map_groups__fixup_end (struct map_groups *mg)

int	file__read_maps (int fd, bool exe, mapfn_t mapfn, void data, bool is_64_bit)

int	kcore_extract__create (struct kcore_extract *kce)

void	kcore_extract__delete (struct kcore_extract *kce)

int	kcore_copy (const char from_dir, const char to_dir)

int	compare_proc_modules (const char from, const char to)

int	setup_list (struct strlist *list, const char list_str, const char *list_name)

int	setup_intlist (struct intlist *list, const char list_str, const char *list_name)

const char *	arch__normalize_symbol_name (const char *name)

int	arch__compare_symbol_names (const char namea, const char nameb)

int	arch__compare_symbol_names_n (const char namea, const char nameb, unsigned int n)

int	arch__choose_best_symbol (struct symbol syma, struct symbol symb)

int	symbol__match_symbol_name (const char namea, const char nameb, enum symbol_tag_include includes)

int	get_sdt_note_list (struct list_head head, const char target)

int	cleanup_sdt_note_list (struct list_head *sdt_notes)

int	sdt_notes__get_count (struct list_head *start)

struct mem_info *	mem_info__new (void)

struct mem_info *	mem_info__get (struct mem_info *mi)

void	mem_info__put (struct mem_info *mi)

static void	__mem_info__zput (struct mem_info **mi)

Variables
struct symbol_conf	symbol_conf

int	vmlinux_path__nr_entries

char **	vmlinux_path

Macro Definition Documentation

◆ DMGL_ANSI

#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */

Definition at line 45 of file symbol.h.

◆ DMGL_NO_OPTS

#define DMGL_NO_OPTS 0 /* For readability... */

Definition at line 43 of file symbol.h.

◆ DMGL_PARAMS

#define DMGL_PARAMS (1 << 0) /* Include function args */

Definition at line 44 of file symbol.h.

◆ DSO__NAME_KALLSYMS

#define DSO__NAME_KALLSYMS "[kernel.kallsyms]"

Definition at line 48 of file symbol.h.

◆ DSO__NAME_KCORE

#define DSO__NAME_KCORE "[kernel.kcore]"

Definition at line 49 of file symbol.h.

◆ mem_info__zput

#define mem_info__zput ( mi ) __mem_info__zput(&mi)

Definition at line 398 of file symbol.h.

◆ NR_ADDR

#define NR_ADDR 3

Definition at line 386 of file symbol.h.

◆ PERF_ELF_C_READ_MMAP

#define PERF_ELF_C_READ_MMAP ELF_C_READ

Definition at line 34 of file symbol.h.

◆ PERF_KCORE_EXTRACT

#define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"

Definition at line 321 of file symbol.h.

◆ SDT_BASE_SCN

#define SDT_BASE_SCN ".stapsdt.base"

Definition at line 382 of file symbol.h.

◆ SDT_NOTE_NAME

#define SDT_NOTE_NAME "stapsdt"

Definition at line 385 of file symbol.h.

◆ SDT_NOTE_SCN

#define SDT_NOTE_SCN ".note.stapsdt"

Definition at line 383 of file symbol.h.

◆ SDT_NOTE_TYPE

#define SDT_NOTE_TYPE 3

Definition at line 384 of file symbol.h.

◆ symbol__join_symfs

#define symbol__join_symfs	(	bf,
		path
	)	__symbol__join_symfs(bf, sizeof(bf), path)

Definition at line 163 of file symbol.h.

◆ SYMBOL_A

#define SYMBOL_A 0

Definition at line 349 of file symbol.h.

◆ SYMBOL_B

#define SYMBOL_B 1

Definition at line 350 of file symbol.h.

◆ symbols__for_each_entry

#define symbols__for_each_entry	(	symbols,
		pos,
		nd
	)

Value:

for (nd = rb_first(symbols);                    \
         nd && (pos = rb_entry(nd, struct symbol, rb_node));    \
         nd = rb_next(nd))

Definition at line 78 of file symbol.h.

Typedef Documentation

◆ mapfn_t

typedef int(* mapfn_t) (u64 start, u64 len, u64 pgoff, void *data)

Definition at line 317 of file symbol.h.

Enumeration Type Documentation

◆ symbol_tag_include

enum symbol_tag_include

Enumerator
SYMBOL_TAG_INCLUDE__NONE
SYMBOL_TAG_INCLUDE__DEFAULT_ONLY

Definition at line 357 of file symbol.h.

Function Documentation

◆ dsoload_kallsyms()

int __dso__load_kallsyms	(	struct dso *	dso,
		const char *	filename,
		struct map *	map,
		bool	no_kcore
	)

Definition at line 1311 of file symbol.c.

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◆ __mem_info__zput()

static void __mem_info__zput ( struct mem_info ** mi )

inlinestatic

Definition at line 392 of file symbol.h.

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◆ symbolfprintf_symname()

size_t __symbol__fprintf_symname	(	const struct symbol *	sym,
		const struct addr_location *	al,
		bool	unknown_as_addr,
		FILE *	fp
	)

Definition at line 48 of file symbol_fprintf.c.

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◆ symbolfprintf_symname_offs()

size_t __symbol__fprintf_symname_offs	(	const struct symbol *	sym,
		const struct addr_location *	al,
		bool	unknown_as_addr,
		bool	print_offsets,
		FILE *	fp
	)

Definition at line 17 of file symbol_fprintf.c.

◆ symboljoin_symfs()

static int __symbol__join_symfs	(	char *	bf,
		size_t	size,
		const char *	path
	)

inlinestatic

Definition at line 158 of file symbol.h.

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◆ symbolsinsert()

void __symbols__insert	(	struct rb_root *	symbols,
		struct symbol *	sym,
		bool	kernel
	)

Definition at line 298 of file symbol.c.

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◆ arch__choose_best_symbol()

int arch__choose_best_symbol	(	struct symbol *	syma,
		struct symbol *	symb
	)

◆ arch__compare_symbol_names()

int arch__compare_symbol_names	(	const char *	namea,
		const char *	nameb
	)

Definition at line 45 of file sym-handling.c.

◆ arch__compare_symbol_names_n()

int arch__compare_symbol_names_n	(	const char *	namea,
		const char *	nameb,
		unsigned int	n
	)

Definition at line 56 of file sym-handling.c.

◆ arch__normalize_symbol_name()

const char* arch__normalize_symbol_name ( const char * name )

Definition at line 68 of file sym-handling.c.

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◆ cleanup_sdt_note_list()

int cleanup_sdt_note_list ( struct list_head * sdt_notes )

◆ compare_proc_modules()

int compare_proc_modules	(	const char *	from,
		const char *	to
	)

Definition at line 986 of file symbol.c.

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◆ dso__demangle_sym()

char* dso__demangle_sym	(	struct dso *	dso,
		int	kmodule,
		const char *	elf_name
	)

Definition at line 398 of file symbol-elf.c.

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◆ dso__find_symbol()

struct symbol* dso__find_symbol	(	struct dso *	dso,
		u64	addr
	)

Definition at line 496 of file symbol.c.

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◆ dso__find_symbol_by_name()

struct symbol* dso__find_symbol_by_name	(	struct dso *	dso,
		const char *	name
	)

Definition at line 532 of file symbol.c.

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◆ dso__first_symbol()

struct symbol* dso__first_symbol ( struct dso * dso )

Definition at line 506 of file symbol.c.

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◆ dso__insert_symbol()

void dso__insert_symbol	(	struct dso *	dso,
		struct symbol *	sym
	)

Definition at line 484 of file symbol.c.

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◆ dso__last_symbol()

struct symbol* dso__last_symbol ( struct dso * dso )

Definition at line 511 of file symbol.c.

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◆ dso__load()

int dso__load	(	struct dso *	dso,
		struct map *	map
	)

Definition at line 1487 of file symbol.c.

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◆ dso__load_kallsyms()

int dso__load_kallsyms	(	struct dso *	dso,
		const char *	filename,
		struct map *	map
	)

Definition at line 1343 of file symbol.c.

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◆ dso__load_sym()

int dso__load_sym	(	struct dso *	dso,
		struct map *	map,
		struct symsrc *	syms_ss,
		struct symsrc *	runtime_ss,
		int	kmodule
	)

Definition at line 904 of file symbol-elf.c.

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◆ dso__load_vmlinux()

int dso__load_vmlinux	(	struct dso *	dso,
		struct map *	map,
		const char *	vmlinux,
		bool	vmlinux_allocated
	)

Definition at line 1698 of file symbol.c.

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◆ dso__load_vmlinux_path()

int dso__load_vmlinux_path	(	struct dso *	dso,
		struct map *	map
	)

Definition at line 1735 of file symbol.c.

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◆ dso__next_symbol()

struct symbol* dso__next_symbol ( struct symbol * sym )

Definition at line 516 of file symbol.c.

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◆ dso__synthesize_plt_symbols()

int dso__synthesize_plt_symbols	(	struct dso *	dso,
		struct symsrc *	ss
	)

Definition at line 245 of file symbol-elf.c.

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◆ dso__type_fd()

enum dso_type dso__type_fd ( int fd )

Definition at line 1179 of file symbol-elf.c.

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◆ file__read_maps()

int file__read_maps	(	int	fd,
		bool	exe,
		mapfn_t	mapfn,
		void *	data,
		bool *	is_64_bit
	)

Definition at line 1160 of file symbol-elf.c.

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◆ filename__read_build_id()

int filename__read_build_id	(	const char *	filename,
		void *	bf,
		size_t	size
	)

Definition at line 487 of file symbol-elf.c.

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◆ filename__read_debuglink()

int filename__read_debuglink	(	const char *	filename,
		char *	debuglink,
		size_t	size
	)

Definition at line 565 of file symbol-elf.c.

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◆ get_sdt_note_list()

int get_sdt_note_list	(	struct list_head *	head,
		const char *	target
	)

◆ kcore_copy()

int kcore_copy	(	const char *	from_dir,
		const char *	to_dir
	)

kcore_copy - copy kallsyms, modules and kcore from one directory to another. : from directory : to directory

This function copies kallsyms, modules and kcore files from one directory to another. kallsyms and modules are copied entirely. Only code segments are copied from kcore. It is assumed that two segments suffice: one for the kernel proper and one for all the modules. The code segments are determined from kallsyms and modules files. The kernel map starts at _stext or the lowest function symbol, and ends at _etext or the highest function symbol. The module map starts at the lowest module address and ends at the highest module symbol. Start addresses are rounded down to the nearest page. End addresses are rounded up to the nearest page. An extra page is added to the highest kernel symbol and highest module symbol to, hopefully, encompass that symbol too. Because it contains only code sections, the resulting kcore is unusual. One significant peculiarity is that the mapping (start -> pgoff) is not the same for the kernel map and the modules map. That happens because the data is copied adjacently whereas the original kcore has gaps. Finally, kallsyms and modules files are compared with their copies to check that modules have not been loaded or unloaded while the copies were taking place.

Return: %0 on success, %-1 on failure.

Definition at line 1818 of file symbol-elf.c.

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◆ kcore_extract__create()

int kcore_extract__create ( struct kcore_extract * kce )

Definition at line 1904 of file symbol-elf.c.

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◆ kcore_extract__delete()

void kcore_extract__delete ( struct kcore_extract * kce )

Definition at line 1944 of file symbol-elf.c.

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◆ map_groups__fixup_end()

void map_groups__fixup_end ( struct map_groups * mg )

Definition at line 223 of file symbol.c.

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◆ mem_info__get()

struct mem_info* mem_info__get ( struct mem_info * mi )

Definition at line 2228 of file symbol.c.

◆ mem_info__new()

struct mem_info* mem_info__new ( void )

Definition at line 2241 of file symbol.c.

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◆ mem_info__put()

void mem_info__put ( struct mem_info * mi )

Definition at line 2235 of file symbol.c.

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◆ modules__parse()

int modules__parse	(	const char *	filename,
		void *	arg,
		int()(void arg, const char *name, u64 start, u64 size)	process_module
	)

Definition at line 548 of file symbol.c.

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◆ sdt_notes__get_count()

int sdt_notes__get_count ( struct list_head * start )

◆ setup_intlist()

int setup_intlist	(	struct intlist **	list,
		const char *	list_str,
		const char *	list_name
	)

Definition at line 2064 of file symbol.c.

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◆ setup_list()

int setup_list	(	struct strlist **	list,
		const char *	list_str,
		const char *	list_name
	)

Definition at line 2048 of file symbol.c.

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◆ symbol__annotation_init()

int symbol__annotation_init ( void )

Definition at line 2097 of file symbol.c.

◆ symbol__config_symfs()

int symbol__config_symfs	(	const struct option *opt	__maybe_unused,
		const char *	dir,
		int unset	__maybe_unused
	)

Definition at line 2205 of file symbol.c.

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◆ symbol__delete()

void symbol__delete ( struct symbol * sym )

Definition at line 280 of file symbol.c.

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◆ symbol__elf_init()

void symbol__elf_init ( void )

Definition at line 2224 of file symbol-elf.c.

◆ symbol__exit()

void symbol__exit ( void )

Definition at line 2189 of file symbol.c.

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◆ symbol__fprintf()

size_t symbol__fprintf	(	struct symbol *	sym,
		FILE *	fp
	)

Definition at line 8 of file symbol_fprintf.c.

◆ symbol__fprintf_symname()

size_t symbol__fprintf_symname	(	const struct symbol *	sym,
		FILE *	fp
	)

Definition at line 55 of file symbol_fprintf.c.

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◆ symbol__fprintf_symname_offs()

size_t symbol__fprintf_symname_offs	(	const struct symbol *	sym,
		const struct addr_location *	al,
		FILE *	fp
	)

Definition at line 41 of file symbol_fprintf.c.

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◆ symbol__init()

int symbol__init ( struct perf_env * env )

Definition at line 2112 of file symbol.c.

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◆ symbol__match_symbol_name()

int symbol__match_symbol_name	(	const char *	namea,
		const char *	nameb,
		enum symbol_tag_include	includes
	)

Definition at line 417 of file symbol.c.

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◆ symbol__new()

struct symbol* symbol__new	(	u64	start,
		u64	len,
		u8	binding,
		u8	type,
		const char *	name
	)

Definition at line 251 of file symbol.c.

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◆ symbol__next_by_name()

struct symbol* symbol__next_by_name ( struct symbol * sym )

Definition at line 521 of file symbol.c.

◆ symbol__priv()

static void* symbol__priv ( struct symbol * sym )

inlinestatic

Definition at line 168 of file symbol.h.

◆ symbol__restricted_filename()

bool symbol__restricted_filename	(	const char *	filename,
		const char *	restricted_filename
	)

Definition at line 872 of file symbol.c.

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◆ symbol__size()

static size_t symbol__size ( const struct symbol * sym )

inlinestatic

Definition at line 83 of file symbol.h.

◆ symbols__delete()

void symbols__delete ( struct rb_root * symbols )

Definition at line 285 of file symbol.c.

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◆ symbols__fixup_duplicate()

void symbols__fixup_duplicate ( struct rb_root * symbols )

Definition at line 166 of file symbol.c.

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◆ symbols__fixup_end()

void symbols__fixup_end ( struct rb_root * symbols )

Definition at line 200 of file symbol.c.

◆ symbols__insert()

void symbols__insert	(	struct rb_root *	symbols,
		struct symbol *	sym
	)

Definition at line 328 of file symbol.c.

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◆ symsrc__destroy()

void symsrc__destroy ( struct symsrc * ss )

Definition at line 654 of file symbol-elf.c.

◆ symsrc__has_symtab()

bool symsrc__has_symtab ( struct symsrc * ss )

Definition at line 649 of file symbol-elf.c.

◆ symsrc__init()

int symsrc__init	(	struct symsrc *	ss,
		struct dso *	dso,
		const char *	name,
		enum dso_binary_type	type
	)

Definition at line 666 of file symbol-elf.c.

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◆ symsrc__possibly_runtime()

bool symsrc__possibly_runtime ( struct symsrc * ss )

Definition at line 644 of file symbol-elf.c.

◆ sysfs__read_build_id()

int sysfs__read_build_id	(	const char *	filename,
		void *	bf,
		size_t	size
	)

Definition at line 514 of file symbol-elf.c.

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Variable Documentation

◆ symbol_conf

struct symbol_conf symbol_conf

Definition at line 40 of file symbol.c.

◆ vmlinux_path

char** vmlinux_path

Definition at line 38 of file symbol.c.

◆ vmlinux_path__nr_entries

int vmlinux_path__nr_entries

Definition at line 37 of file symbol.c.

Classes

Macros

Typedefs

Enumerations

Functions

Variables

Macro Definition Documentation

◆ DMGL_ANSI

◆ DMGL_NO_OPTS

◆ DMGL_PARAMS

◆ DSO__NAME_KALLSYMS

◆ DSO__NAME_KCORE

◆ mem_info__zput

◆ NR_ADDR

◆ PERF_ELF_C_READ_MMAP

◆ PERF_KCORE_EXTRACT

◆ SDT_BASE_SCN

◆ SDT_NOTE_NAME

◆ SDT_NOTE_SCN

◆ SDT_NOTE_TYPE

◆ symbol__join_symfs

◆ SYMBOL_A

◆ SYMBOL_B

◆ symbols__for_each_entry

Typedef Documentation

◆ mapfn_t

Enumeration Type Documentation

◆ symbol_tag_include

Function Documentation

◆ __dso__load_kallsyms()

◆ __mem_info__zput()

◆ __symbol__fprintf_symname()

◆ __symbol__fprintf_symname_offs()

◆ __symbol__join_symfs()

◆ __symbols__insert()

◆ arch__choose_best_symbol()

◆ arch__compare_symbol_names()

◆ arch__compare_symbol_names_n()

◆ arch__normalize_symbol_name()

◆ cleanup_sdt_note_list()

◆ compare_proc_modules()

◆ dso__demangle_sym()

◆ dso__find_symbol()

◆ dso__find_symbol_by_name()

◆ dso__first_symbol()

◆ dso__insert_symbol()

◆ dso__last_symbol()

◆ dso__load()

◆ dso__load_kallsyms()

◆ dso__load_sym()

◆ dso__load_vmlinux()

◆ dso__load_vmlinux_path()

◆ dso__next_symbol()

◆ dso__synthesize_plt_symbols()

◆ dso__type_fd()

◆ file__read_maps()

◆ filename__read_build_id()

◆ filename__read_debuglink()

◆ get_sdt_note_list()

◆ kcore_copy()

◆ kcore_extract__create()

◆ kcore_extract__delete()

◆ map_groups__fixup_end()

◆ mem_info__get()

◆ mem_info__new()

◆ mem_info__put()

◆ modules__parse()

◆ sdt_notes__get_count()

◆ setup_intlist()

◆ setup_list()

◆ symbol__annotation_init()

◆ symbol__config_symfs()

◆ symbol__delete()

◆ symbol__elf_init()

◆ symbol__exit()

◆ symbol__fprintf()

◆ symbol__fprintf_symname()

◆ symbol__fprintf_symname_offs()

◆ symbol__init()

◆ symbol__match_symbol_name()

◆ dsoload_kallsyms()

◆ symbolfprintf_symname()

◆ symbolfprintf_symname_offs()

◆ symboljoin_symfs()

◆ symbolsinsert()