perf tools: Allow user to indicate path to objdump in command line

When analyzing perf data from hosts of other architecture than one of
the local host it's useful to call objdump that is part of a toolchain
for that architecture. Instead of calling regular objdump, call one that
user specified in command line.

Signed-off-by: Maciek Borzecki <maciek.borzecki@gmail.com>
Acked-by: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/1346754750.16299.3.camel@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Documentation/perf-annotate.txt

@@ -85,6 +85,9 @@ OPTIONS
 -M::
 --disassembler-style=:: Set disassembler style for objdump.
 
+--objdump=<path>::
+        Path to objdump binary.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-report[1]

tools/perf/Documentation/perf-report.txt

@@ -168,6 +168,9 @@ OPTIONS
 	branch stacks and it will automatically switch to the branch view mode,
 	unless --no-branch-stack is used.
 
+--objdump=<path>::
+        Path to objdump binary.
+
 SEE ALSO
 --------
 linkperf:perf-stat[1], linkperf:perf-annotate[1]

tools/perf/builtin-annotate.c

@@ -282,6 +282,8 @@ int cmd_annotate(int argc, const char **argv, const char *prefix __used)
 		    "Display raw encoding of assembly instructions (default)"),
 	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
 		   "Specify disassembler style (e.g. -M intel for intel syntax)"),
+	OPT_STRING(0, "objdump", &objdump_path, "path",
+		   "objdump binary to use for disassembly and annotations"),
 	OPT_END()
 	};
 

tools/perf/builtin-report.c

@@ -638,6 +638,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
 		    "Show a column with the sum of periods"),
 	OPT_CALLBACK_NOOPT('b', "branch-stack", &sort__branch_mode, "",
 		    "use branch records for histogram filling", parse_branch_mode),
+	OPT_STRING(0, "objdump", &objdump_path, "path",
+		   "objdump binary to use for disassembly and annotations"),
 	OPT_END()
 	};
 

tools/perf/util/annotate.c

@@ -17,6 +17,7 @@
 #include <pthread.h>
 
 const char 	*disassembler_style;
+const char	*objdump_path;
 
 static struct ins *ins__find(const char *name);
 static int disasm_line__parse(char *line, char **namep, char **rawp);
@@ -820,9 +821,10 @@ fallback:
 		 dso, dso->long_name, sym, sym->name);
 
 	snprintf(command, sizeof(command),
-		 "objdump %s%s --start-address=0x%016" PRIx64
+		 "%s %s%s --start-address=0x%016" PRIx64
 		 " --stop-address=0x%016" PRIx64
 		 " -d %s %s -C %s|grep -v %s|expand",
+		 objdump_path ? objdump_path : "objdump",
 		 disassembler_style ? "-M " : "",
 		 disassembler_style ? disassembler_style : "",
 		 map__rip_2objdump(map, sym->start),

tools/perf/util/annotate.h

@@ -152,5 +152,6 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 #endif
 
 extern const char	*disassembler_style;
+extern const char	*objdump_path;
 
 #endif	/* __PERF_ANNOTATE_H */