linux-kernel - [PATCH V5 12/17] tools/perf: Make capstone_init non-static so that it can be used during symbol disassemble

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Date: Mon,  1 Jul 2024 10:04:25 +0530
From: Athira Rajeev <atrajeev@...ux.vnet.ibm.com>
To: acme@...nel.org, jolsa@...nel.org, adrian.hunter@...el.com,
        irogers@...gle.com, namhyung@...nel.org, segher@...nel.crashing.org,
        christophe.leroy@...roup.eu
Cc: linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, akanksha@...ux.ibm.com,
        maddy@...ux.ibm.com, atrajeev@...ux.vnet.ibm.com, kjain@...ux.ibm.com,
        disgoel@...ux.vnet.ibm.com
Subject: [PATCH V5 12/17] tools/perf: Make capstone_init non-static so that it can be used during symbol disassemble

symbol__disassemble_capstone in util/disasm.c calls function
open_capstone_handle to open/init the capstone. We already have a
capstone_init function in "util/print_insn.c". But capstone_init
is defined as a static function in util/print_insn.c. Change this and
also add the function in print_insn.h

The open_capstone_handle checks the disassembler_style option from
annotation_options to decide whether to set CS_OPT_SYNTAX_ATT.
Add that logic in capstone_init also and by default set it to true.

Signed-off-by: Athira Rajeev <atrajeev@...ux.vnet.ibm.com>
---
 tools/perf/util/print_insn.c | 12 +++++++++---
 tools/perf/util/print_insn.h |  5 +++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/print_insn.c b/tools/perf/util/print_insn.c
index a950e9157d2d..a76aae81d7a0 100644
--- a/tools/perf/util/print_insn.c
+++ b/tools/perf/util/print_insn.c
@@ -32,7 +32,7 @@ size_t sample__fprintf_insn_raw(struct perf_sample *sample, FILE *fp)
 #ifdef HAVE_LIBCAPSTONE_SUPPORT
 #include <capstone/capstone.h>
 
-static int capstone_init(struct machine *machine, csh *cs_handle, bool is64)
+int capstone_init(struct machine *machine, csh *cs_handle, bool is64, bool disassembler_style)
 {
 	cs_arch arch;
 	cs_mode mode;
@@ -62,7 +62,13 @@ static int capstone_init(struct machine *machine, csh *cs_handle, bool is64)
 	}
 
 	if (machine__normalized_is(machine, "x86")) {
-		cs_option(*cs_handle, CS_OPT_SYNTAX, CS_OPT_SYNTAX_ATT);
+		/*
+		 * In case of using capstone_init while symbol__disassemble
+		 * setting CS_OPT_SYNTAX_ATT depends if disassembler_style opts
+		 * is set via annotation args
+		 */
+		if (disassembler_style)
+			cs_option(*cs_handle, CS_OPT_SYNTAX, CS_OPT_SYNTAX_ATT);
 		/*
 		 * Resolving address operands to symbols is implemented
 		 * on x86 by investigating instruction details.
@@ -122,7 +128,7 @@ ssize_t fprintf_insn_asm(struct machine *machine, struct thread *thread, u8 cpum
 	int ret;
 
 	/* TODO: Try to initiate capstone only once but need a proper place. */
-	ret = capstone_init(machine, &cs_handle, is64bit);
+	ret = capstone_init(machine, &cs_handle, is64bit, true);
 	if (ret < 0)
 		return ret;
 
diff --git a/tools/perf/util/print_insn.h b/tools/perf/util/print_insn.h
index 07d11af3fc1c..2c8ee41c4a5d 100644
--- a/tools/perf/util/print_insn.h
+++ b/tools/perf/util/print_insn.h
@@ -19,4 +19,9 @@ ssize_t fprintf_insn_asm(struct machine *machine, struct thread *thread, u8 cpum
 			 bool is64bit, const uint8_t *code, size_t code_size,
 			 uint64_t ip, int *lenp, int print_opts, FILE *fp);
 
+#ifdef HAVE_LIBCAPSTONE_SUPPORT
+#include <capstone/capstone.h>
+int capstone_init(struct machine *machine, csh *cs_handle, bool is64, bool disassembler_style);
+#endif
+
 #endif /* PERF_PRINT_INSN_H */
-- 
2.43.0