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Subject[PATCH 5/8] perf symbols: Do not use ELF's symbol binding constants
Date
From: Namhyung Kim <namhyung.kim@lge.com>

There's no need to use the ELF's internal value directly.
Define and use our own - it's required to eliminated the
dependency of libelf.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/builtin-top.c | 5 ++---
tools/perf/ui/browsers/map.c | 5 ++---
tools/perf/util/symbol.c | 40 ++++++++++++++++++++++++++--------------
tools/perf/util/symbol.h | 4 ++++
4 files changed, 34 insertions(+), 20 deletions(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index e3cab5f088f8..e0977175f689 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -42,7 +42,6 @@
#include "util/debug.h"

#include <assert.h>
-#include <elf.h>
#include <fcntl.h>

#include <stdio.h>
@@ -181,8 +180,8 @@ static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
"Please report to linux-kernel@vger.kernel.org\n",
ip, map->dso->long_name, dso__symtab_origin(map->dso),
map->start, map->end, sym->start, sym->end,
- sym->binding == STB_GLOBAL ? 'g' :
- sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
+ sym->binding == SYMBIND_GLOBAL ? 'g' :
+ sym->binding == SYMBIND_LOCAL ? 'l' : 'w', sym->name,
err ? "[unknown]" : uts.machine,
err ? "[unknown]" : uts.release, perf_version_string);
if (use_browser <= 0)
diff --git a/tools/perf/ui/browsers/map.c b/tools/perf/ui/browsers/map.c
index 98851d55a53e..f2059664b23f 100644
--- a/tools/perf/ui/browsers/map.c
+++ b/tools/perf/ui/browsers/map.c
@@ -1,5 +1,4 @@
#include "../libslang.h"
-#include <elf.h>
#include <newt.h>
#include <inttypes.h>
#include <sys/ttydefaults.h>
@@ -61,8 +60,8 @@ static void map_browser__write(struct ui_browser *self, void *nd, int row)
ui_browser__set_percent_color(self, 0, current_entry);
slsmg_printf("%*" PRIx64 " %*" PRIx64 " %c ",
mb->addrlen, sym->start, mb->addrlen, sym->end,
- sym->binding == STB_GLOBAL ? 'g' :
- sym->binding == STB_LOCAL ? 'l' : 'w');
+ sym->binding == SYMBIND_GLOBAL ? 'g' :
+ sym->binding == SYMBIND_LOCAL ? 'l' : 'w');
width = self->width - ((mb->addrlen * 2) + 4);
if (width > 0)
slsmg_write_nstring(sym->name, width);
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 38447ad42ad1..db807a8535d1 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -114,16 +114,16 @@ static int choose_best_symbol(struct symbol *syma, struct symbol *symb)
return SYMBOL_B;

/* Prefer a non weak symbol over a weak one */
- a = syma->binding == STB_WEAK;
- b = symb->binding == STB_WEAK;
+ a = syma->binding == SYMBIND_WEAK;
+ b = symb->binding == SYMBIND_WEAK;
if (b && !a)
return SYMBOL_A;
if (a && !b)
return SYMBOL_B;

/* Prefer a global symbol over a non global one */
- a = syma->binding == STB_GLOBAL;
- b = symb->binding == STB_GLOBAL;
+ a = syma->binding == SYMBIND_GLOBAL;
+ b = symb->binding == SYMBIND_GLOBAL;
if (a && !b)
return SYMBOL_A;
if (b && !a)
@@ -259,8 +259,8 @@ static size_t symbol__fprintf(struct symbol *sym, FILE *fp)
{
return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n",
sym->start, sym->end,
- sym->binding == STB_GLOBAL ? 'g' :
- sym->binding == STB_LOCAL ? 'l' : 'w',
+ sym->binding == SYMBIND_GLOBAL ? 'g' :
+ sym->binding == SYMBIND_LOCAL ? 'l' : 'w',
sym->name);
}

@@ -609,12 +609,12 @@ struct process_kallsyms_args {
struct dso *dso;
};

-static u8 kallsyms2elf_type(char type)
+static u8 kallsyms_binding(char type)
{
if (type == 'W')
- return STB_WEAK;
+ return SYMBIND_WEAK;

- return isupper(type) ? STB_GLOBAL : STB_LOCAL;
+ return isupper(type) ? SYMBIND_GLOBAL : SYMBIND_LOCAL;
}

static int map__process_kallsym_symbol(void *arg, const char *name,
@@ -628,7 +628,7 @@ static int map__process_kallsym_symbol(void *arg, const char *name,
return 0;

sym = symbol__new(start, end - start + 1,
- kallsyms2elf_type(type), name);
+ kallsyms_binding(type), name);
if (sym == NULL)
return -ENOMEM;
/*
@@ -851,7 +851,7 @@ static int dso__load_perf_map(struct dso *dso, struct map *map,
if (len + 2 >= line_len)
continue;

- sym = symbol__new(start, size, STB_GLOBAL, line + len);
+ sym = symbol__new(start, size, SYMBIND_GLOBAL, line + len);

if (sym == NULL)
goto out_delete_line;
@@ -1064,7 +1064,7 @@ dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map,
"%s@plt", elf_sym__name(&sym, symstrs));

f = symbol__new(plt_offset, shdr_plt.sh_entsize,
- STB_GLOBAL, sympltname);
+ SYMBIND_GLOBAL, sympltname);
if (!f)
goto out_elf_end;

@@ -1086,7 +1086,7 @@ dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map,
"%s@plt", elf_sym__name(&sym, symstrs));

f = symbol__new(plt_offset, shdr_plt.sh_entsize,
- STB_GLOBAL, sympltname);
+ SYMBIND_GLOBAL, sympltname);
if (!f)
goto out_elf_end;

@@ -1157,6 +1157,18 @@ static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr)
return -1;
}

+static int elf_sym__binding(const GElf_Sym *sym)
+{
+ switch (GELF_ST_BIND(sym->st_info)) {
+ case STB_GLOBAL:
+ return SYMBIND_GLOBAL;
+ case STB_WEAK:
+ return SYMBIND_WEAK;
+ default:
+ return SYMBIND_LOCAL;
+ }
+}
+
static int dso__swap_init(struct dso *dso, unsigned char eidata)
{
static unsigned int const endian = 1;
@@ -1390,7 +1402,7 @@ static int dso__load_sym(struct dso *dso, struct map *map, const char *name,
elf_name = demangled;
new_symbol:
f = symbol__new(sym.st_value, sym.st_size,
- GELF_ST_BIND(sym.st_info), elf_name);
+ elf_sym__binding(&sym), elf_name);
free(demangled);
if (!f)
goto out_elf_end;
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 295a9aa1cc78..bd91d2aa8262 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -50,6 +50,10 @@ char *strxfrchar(char *s, char from, char to);

#define BUILD_ID_SIZE 20

+#define SYMBIND_LOCAL 0
+#define SYMBIND_GLOBAL 1
+#define SYMBIND_WEAK 2
+
/** struct symbol - symtab entry
*
* @ignore - resolvable but tools ignore it (e.g. idle routines)
--
1.7.10.2


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