From: Alan Kao <alankao@andestech.com>
To: Palmer Dabbelt <palmer@sifive.com>, Albert Ou <albert@sifive.com>,
"Steven Rostedt" <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>, <patches@groups.riscv.org>,
<linux-kernel@vger.kernel.org>, <greentime@andestech.com>
Cc: Alan Kao <alankao@andestech.com>
Subject: [PATCH v4 4/6] riscv/ftrace: Add ARCH_SUPPORTS_FTRACE_OPS support
Date: Tue, 13 Feb 2018 13:13:19 +0800 [thread overview]
Message-ID: <1518498801-677-5-git-send-email-alankao@andestech.com> (raw)
In-Reply-To: <1518498801-677-1-git-send-email-alankao@andestech.com>
Cc: Greentime Hu <greentime@andestech.com>
Signed-off-by: Alan Kao <alankao@andestech.com>
---
arch/riscv/include/asm/ftrace.h | 1 +
arch/riscv/kernel/mcount-dyn.S | 3 +++
2 files changed, 4 insertions(+)
diff --git a/arch/riscv/include/asm/ftrace.h b/arch/riscv/include/asm/ftrace.h
index 078743aacfd3..fedadc40e358 100644
--- a/arch/riscv/include/asm/ftrace.h
+++ b/arch/riscv/include/asm/ftrace.h
@@ -9,6 +9,7 @@
#define HAVE_FUNCTION_GRAPH_FP_TEST
#endif
+#define ARCH_SUPPORTS_FTRACE_OPS 1
#ifndef __ASSEMBLY__
void _mcount(void);
static inline unsigned long ftrace_call_adjust(unsigned long addr)
diff --git a/arch/riscv/kernel/mcount-dyn.S b/arch/riscv/kernel/mcount-dyn.S
index 739e07a6fd85..6bbc3f88fcb3 100644
--- a/arch/riscv/kernel/mcount-dyn.S
+++ b/arch/riscv/kernel/mcount-dyn.S
@@ -74,9 +74,12 @@ ENTRY(ftrace_caller)
/*
* a0: the address in the caller when calling ftrace_caller
* a1: the caller's return address
+ * a2: the address of global variable function_trace_op
*/
ld a1, -8(s0)
addi a0, ra, -MCOUNT_INSN_SIZE
+ la t5, function_trace_op
+ ld a2, 0(t5)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
/*
--
2.15.1
next prev parent reply other threads:[~2018-02-13 5:43 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-13 5:13 [PATCH v4 0/6] Add dynamic ftrace support for RISC-V platforms Alan Kao
2018-02-13 5:13 ` [PATCH v4 1/6] riscv/ftrace: Add RECORD_MCOUNT support Alan Kao
2018-02-13 5:13 ` [PATCH v4 2/6] riscv/ftrace: Add dynamic function tracer support Alan Kao
2018-02-13 5:13 ` [PATCH v4 3/6] riscv/ftrace: Add dynamic function graph " Alan Kao
2018-02-13 5:13 ` Alan Kao [this message]
2018-02-13 5:13 ` [PATCH v4 5/6] riscv/ftrace: Add DYNAMIC_FTRACE_WITH_REGS support Alan Kao
2018-02-13 5:13 ` [PATCH v4 6/6] riscv/ftrace: Add HAVE_FUNCTION_GRAPH_RET_ADDR_PTR support Alan Kao
2018-02-21 2:45 ` [PATCH v4 0/6] Add dynamic ftrace support for RISC-V platforms Alan Kao
2018-02-24 1:02 ` [patches] " Palmer Dabbelt
2018-02-21 16:05 ` [patches] " Palmer Dabbelt
2018-02-22 8:45 ` Alan Kao
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