linux-kernel - [RFC PATCH v2 13/20] objtool: arm64: Dump ORC data present in object files

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Date:   Mon, 23 May 2022 19:16:30 -0500
From:   madvenka@...ux.microsoft.com
To:     jpoimboe@...hat.com, peterz@...radead.org, chenzhongjin@...wei.com,
        mark.rutland@....com, broonie@...nel.org, nobuta.keiya@...itsu.com,
        sjitindarsingh@...il.com, catalin.marinas@....com, will@...nel.org,
        jamorris@...ux.microsoft.com, linux-arm-kernel@...ts.infradead.org,
        live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
        madvenka@...ux.microsoft.com
Subject: [RFC PATCH v2 13/20] objtool: arm64: Dump ORC data present in object files

From: "Madhavan T. Venkataraman" <madvenka@...ux.microsoft.com>

Call orc_dump() from cmd_fpv() to dump the ORC sections in an object
file. This is for debug purposes.

Signed-off-by: Madhavan T. Venkataraman <madvenka@...ux.microsoft.com>
---
 tools/objtool/Build         | 1 +
 tools/objtool/builtin-fpv.c | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/tools/objtool/Build b/tools/objtool/Build
index 5de79c76f3f0..d40ee95039cf 100644
--- a/tools/objtool/Build
+++ b/tools/objtool/Build
@@ -20,6 +20,7 @@ objtool-$(SUBCMD_FPV) += cfi.o
 objtool-$(SUBCMD_FPV) += insn.o
 objtool-$(SUBCMD_FPV) += decode.o
 objtool-$(SUBCMD_FPV) += orc_gen.o
+objtool-$(SUBCMD_FPV) += orc_dump.o
 
 objtool-y += builtin-check.o
 objtool-y += builtin-orc.o
diff --git a/tools/objtool/builtin-fpv.c b/tools/objtool/builtin-fpv.c
index bc8f88f204b5..7934c569e60a 100644
--- a/tools/objtool/builtin-fpv.c
+++ b/tools/objtool/builtin-fpv.c
@@ -19,6 +19,7 @@
 
 static const char * const fpv_usage[] = {
 	"objtool fpv generate file.o",
+	"objtool fpv dump file.o",
 	NULL,
 };
 
@@ -69,6 +70,9 @@ int cmd_fpv(int argc, const char **argv)
 		return elf_write(file->elf);
 	}
 
+	if (!strcmp(argv[0], "dump"))
+		return orc_dump(objname);
+
 	usage_with_options(fpv_usage, fpv_options);
 
 	return 0;
-- 
2.25.1