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authorArnaldo Carvalho de Melo <acme@redhat.com>2010-08-05 12:59:47 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-08-05 19:38:01 -0300
commitc408fedfc4a1fa16e611ffd6f3280301b38614be (patch)
tree5beaf2fe188dc724e0a494d49b389ef83a61720a /tools/perf
parentfc9ea5a1e53ee54f681e226d735008e2a6f8f470 (diff)
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perf symbols: Store the symbol binding
So that tools that wan't to act only on a subset of (weak, global, local) symbols can do so, such as the upcoming uprobes support in 'perf probe'. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/symbol.c30
-rw-r--r--tools/perf/util/symbol.h1
2 files changed, 23 insertions, 8 deletions
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 6f0dd90c36c..b6f5970f910 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -131,7 +131,8 @@ static void map_groups__fixup_end(struct map_groups *self)
__map_groups__fixup_end(self, i);
}
-static struct symbol *symbol__new(u64 start, u64 len, const char *name)
+static struct symbol *symbol__new(u64 start, u64 len, u8 binding,
+ const char *name)
{
size_t namelen = strlen(name) + 1;
struct symbol *self = calloc(1, (symbol_conf.priv_size +
@@ -144,6 +145,7 @@ static struct symbol *symbol__new(u64 start, u64 len, const char *name)
self->start = start;
self->end = len ? start + len - 1 : start;
+ self->binding = binding;
self->namelen = namelen - 1;
pr_debug4("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end);
@@ -160,8 +162,11 @@ void symbol__delete(struct symbol *self)
static size_t symbol__fprintf(struct symbol *self, FILE *fp)
{
- return fprintf(fp, " %llx-%llx %s\n",
- self->start, self->end, self->name);
+ return fprintf(fp, " %llx-%llx %c %s\n",
+ self->start, self->end,
+ self->binding == STB_GLOBAL ? 'g' :
+ self->binding == STB_LOCAL ? 'l' : 'w',
+ self->name);
}
void dso__set_long_name(struct dso *self, char *name)
@@ -453,6 +458,14 @@ struct process_kallsyms_args {
struct dso *dso;
};
+static u8 kallsyms2elf_type(char type)
+{
+ if (type == 'W')
+ return STB_WEAK;
+
+ return isupper(type) ? STB_GLOBAL : STB_LOCAL;
+}
+
static int map__process_kallsym_symbol(void *arg, const char *name,
char type, u64 start)
{
@@ -466,7 +479,7 @@ static int map__process_kallsym_symbol(void *arg, const char *name,
/*
* Will fix up the end later, when we have all symbols sorted.
*/
- sym = symbol__new(start, 0, name);
+ sym = symbol__new(start, 0, kallsyms2elf_type(type), name);
if (sym == NULL)
return -ENOMEM;
@@ -661,7 +674,7 @@ static int dso__load_perf_map(struct dso *self, struct map *map,
if (len + 2 >= line_len)
continue;
- sym = symbol__new(start, size, line + len);
+ sym = symbol__new(start, size, STB_GLOBAL, line + len);
if (sym == NULL)
goto out_delete_line;
@@ -873,7 +886,7 @@ static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
"%s@plt", elf_sym__name(&sym, symstrs));
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
- sympltname);
+ STB_GLOBAL, sympltname);
if (!f)
goto out_elf_end;
@@ -895,7 +908,7 @@ static int dso__synthesize_plt_symbols(struct dso *self, struct map *map,
"%s@plt", elf_sym__name(&sym, symstrs));
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
- sympltname);
+ STB_GLOBAL, sympltname);
if (!f)
goto out_elf_end;
@@ -1146,7 +1159,8 @@ static int dso__load_sym(struct dso *self, struct map *map, const char *name,
if (demangled != NULL)
elf_name = demangled;
new_symbol:
- f = symbol__new(sym.st_value, sym.st_size, elf_name);
+ f = symbol__new(sym.st_value, sym.st_size,
+ GELF_ST_BIND(sym.st_info), 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 906be20011d..b7a8da4af5a 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -53,6 +53,7 @@ struct symbol {
u64 start;
u64 end;
u16 namelen;
+ u8 binding;
char name[0];
};