Commit a1d2a6b4 authored by Alan Kao's avatar Alan Kao Committed by Palmer Dabbelt

riscv/ftrace: Add RECORD_MCOUNT support

Now recordmcount.pl recognizes RISC-V object files. For the mechanism to
work, we have to disable the linker relaxation.

Cc: Greentime Hu <greentime@andestech.com>
Signed-off-by: default avatarAlan Kao <alankao@andestech.com>
Signed-off-by: default avatarPalmer Dabbelt <palmer@sifive.com>
parent 0adb3285
...@@ -114,6 +114,7 @@ config ARCH_RV64I ...@@ -114,6 +114,7 @@ config ARCH_RV64I
select 64BIT select 64BIT
select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_TRACER
select HAVE_FUNCTION_GRAPH_TRACER select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FTRACE_MCOUNT_RECORD
endchoice endchoice
......
...@@ -11,6 +11,9 @@ ...@@ -11,6 +11,9 @@
LDFLAGS := LDFLAGS :=
OBJCOPYFLAGS := -O binary OBJCOPYFLAGS := -O binary
LDFLAGS_vmlinux := LDFLAGS_vmlinux :=
ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
LDFLAGS_vmlinux := --no-relax
endif
KBUILD_AFLAGS_MODULE += -fPIC KBUILD_AFLAGS_MODULE += -fPIC
KBUILD_CFLAGS_MODULE += -fPIC KBUILD_CFLAGS_MODULE += -fPIC
......
...@@ -376,6 +376,11 @@ if ($arch eq "x86_64") { ...@@ -376,6 +376,11 @@ if ($arch eq "x86_64") {
$mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s__mcount\$"; $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s__mcount\$";
$type = ".quad"; $type = ".quad";
$alignment = 8; $alignment = 8;
} elsif ($arch eq "riscv") {
$function_regex = "^([0-9a-fA-F]+)\\s+<([^.0-9][0-9a-zA-Z_\\.]+)>:";
$mcount_regex = "^\\s*([0-9a-fA-F]+):\\sR_RISCV_CALL\\s_mcount\$";
$type = ".quad";
$alignment = 2;
} else { } else {
die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD"; die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD";
} }
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment