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perf tools: Fix compile with libelf without get_phdrnum

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Add a feature check for get_phdrnum() and implement a replacement if it
is not present.

Signed-off-by: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Adrian Hunter 2013-09-13 16:49:30 +03:00 • committed by Arnaldo Carvalho de Melo
commit e955d5c434
3 changed files with 28 additions and 0 deletions
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3
tools/perf/config/Makefile
View file

@ -180,6 +180,9 @@ FLAGS_LIBELF=$(CFLAGS) $(LDFLAGS) $(EXTLIBS)
ifeq ($(call try-cc,$(SOURCE_ELF_MMAP),$(FLAGS_LIBELF),-DLIBELF_MMAP),y)
CFLAGS += -DLIBELF_MMAP
endif
ifeq ($(call try-cc,$(SOURCE_ELF_GETPHDRNUM),$(FLAGS_LIBELF),-DHAVE_ELF_GETPHDRNUM),y)
CFLAGS += -DHAVE_ELF_GETPHDRNUM
endif
# include ARCH specific config
-include $(src-perf)/arch/$(ARCH)/Makefile

9
tools/perf/config/feature-tests.mak
View file

@ -61,6 +61,15 @@ int main(void)
}
endef
define SOURCE_ELF_GETPHDRNUM
#include <libelf.h>
int main(void)
{
size_t dst;
return elf_getphdrnum(0, &dst);
}
endef
ifndef NO_SLANG
define SOURCE_SLANG
#include <slang.h>

16
tools/perf/util/symbol-elf.c
View file

@ -8,6 +8,22 @@
#include "symbol.h"
#include "debug.h"
#ifndef HAVE_ELF_GETPHDRNUM
static int elf_getphdrnum(Elf *elf, size_t *dst)
{
GElf_Ehdr gehdr;
GElf_Ehdr *ehdr;
ehdr = gelf_getehdr(elf, &gehdr);
if (!ehdr)
return -1;
*dst = ehdr->e_phnum;
return 0;
}
#endif
#ifndef NT_GNU_BUILD_ID
#define NT_GNU_BUILD_ID 3
#endif