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Message-Id: <20221123142025.1504030-3-suagrfillet@gmail.com>
Date: Wed, 23 Nov 2022 22:20:25 +0800
From: Song Shuai <suagrfillet@...il.com>
To: guoren@...nel.org, paul.walmsley@...ive.com, palmer@...belt.com,
aou@...s.berkeley.edu, rostedt@...dmis.org, mhiramat@...nel.org,
mark.rutland@....com, peterz@...radead.org, jolsa@...hat.com,
bp@...e.de, jpoimboe@...nel.org
Cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
Song Shuai <suagrfillet@...il.com>
Subject: [PATCH 2/2] samples/ftrace: add riscv support for SAMPLE_FTRACE_DIRECT[_MULTI]
select HAVE_SAMPLE_FTRACE_DIRECT and HAVE_SAMPLE_FTRACE_DIRECT_MULTI
for ARCH_RV64I in arch/riscv/Kconfig. And add riscv asm code for
the ftrace-direct*.c files in samples/ftrace/.
Signed-off-by: Song Shuai <suagrfillet@...il.com>
---
arch/riscv/Kconfig | 2 ++
samples/ftrace/ftrace-direct-modify.c | 35 ++++++++++++++++++-
samples/ftrace/ftrace-direct-multi-modify.c | 37 +++++++++++++++++++++
samples/ftrace/ftrace-direct-multi.c | 22 ++++++++++++
samples/ftrace/ftrace-direct-too.c | 26 +++++++++++++++
samples/ftrace/ftrace-direct.c | 22 ++++++++++++
6 files changed, 143 insertions(+), 1 deletion(-)
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index d083ec08d0b6..572973103d73 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -279,6 +279,8 @@ config ARCH_RV64I
select HAVE_DYNAMIC_FTRACE if !XIP_KERNEL && MMU && $(cc-option,-fpatchable-function-entry=8)
select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
+ select HAVE_SAMPLE_FTRACE_DIRECT
+ select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
select HAVE_FTRACE_MCOUNT_RECORD if !XIP_KERNEL
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FUNCTION_TRACER if !XIP_KERNEL && !PREEMPTION
diff --git a/samples/ftrace/ftrace-direct-modify.c b/samples/ftrace/ftrace-direct-modify.c
index 39146fa83e20..5582d000d803 100644
--- a/samples/ftrace/ftrace-direct-modify.c
+++ b/samples/ftrace/ftrace-direct-modify.c
@@ -17,10 +17,43 @@ void my_direct_func2(void)
trace_printk("my direct func2\n");
}
+static unsigned long my_ip = (unsigned long)schedule;
+
extern void my_tramp1(void *);
extern void my_tramp2(void *);
-static unsigned long my_ip = (unsigned long)schedule;
+#ifdef CONFIG_RISCV
+
+asm (" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp1, @function\n"
+" .globl my_tramp1\n"
+" my_tramp1:\n"
+" addi sp,sp,-16\n"
+" sd t0,0(sp)\n"
+" sd ra,8(sp)\n"
+" call my_direct_func1\n"
+" ld t0,0(sp)\n"
+" ld ra,8(sp)\n"
+" addi sp,sp,16\n"
+" jr t0\n"
+" .size my_tramp1, .-my_tramp1\n"
+
+" .type my_tramp2, @function\n"
+" .globl my_tramp2\n"
+" my_tramp2:\n"
+" addi sp,sp,-16\n"
+" sd t0,0(sp)\n"
+" sd ra,8(sp)\n"
+" call my_direct_func2\n"
+" ld t0,0(sp)\n"
+" ld ra,8(sp)\n"
+" addi sp,sp,16\n"
+" jr t0\n"
+" .size my_tramp2, .-my_tramp2\n"
+" .popsection\n"
+);
+
+#endif /* CONFIG_RISCV */
#ifdef CONFIG_X86_64
diff --git a/samples/ftrace/ftrace-direct-multi-modify.c b/samples/ftrace/ftrace-direct-multi-modify.c
index 65aa94d96f4e..43e02d39c652 100644
--- a/samples/ftrace/ftrace-direct-multi-modify.c
+++ b/samples/ftrace/ftrace-direct-multi-modify.c
@@ -20,6 +20,43 @@ void my_direct_func2(unsigned long ip)
extern void my_tramp1(void *);
extern void my_tramp2(void *);
+#ifdef CONFIG_RISCV
+
+asm (" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp1, @function\n"
+" .globl my_tramp1\n"
+" my_tramp1:\n"
+" addi sp,sp,-24\n"
+" sd a0,0(sp)\n"
+" sd t0,8(sp)\n"
+" sd ra,16(sp)\n"
+" call my_direct_func1\n"
+" ld a0,0(sp)\n"
+" ld t0,8(sp)\n"
+" ld ra,16(sp)\n"
+" addi sp,sp,24\n"
+" jr t0\n"
+" .size my_tramp1, .-my_tramp1\n"
+
+" .type my_tramp2, @function\n"
+" .globl my_tramp2\n"
+" my_tramp2:\n"
+" addi sp,sp,-24\n"
+" sd a0,0(sp)\n"
+" sd t0,8(sp)\n"
+" sd ra,16(sp)\n"
+" call my_direct_func2\n"
+" ld a0,0(sp)\n"
+" ld t0,8(sp)\n"
+" ld ra,16(sp)\n"
+" addi sp,sp,24\n"
+" jr t0\n"
+" .size my_tramp2, .-my_tramp2\n"
+" .popsection\n"
+);
+
+#endif /* CONFIG_RISCV */
+
#ifdef CONFIG_X86_64
#include <asm/ibt.h>
diff --git a/samples/ftrace/ftrace-direct-multi.c b/samples/ftrace/ftrace-direct-multi.c
index 41ded7c615c7..df91339d3095 100644
--- a/samples/ftrace/ftrace-direct-multi.c
+++ b/samples/ftrace/ftrace-direct-multi.c
@@ -15,6 +15,28 @@ void my_direct_func(unsigned long ip)
extern void my_tramp(void *);
+#ifdef CONFIG_RISCV
+
+asm (" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp, @function\n"
+" .globl my_tramp\n"
+" my_tramp:\n"
+" addi sp,sp,-24\n"
+" sd a0,0(sp)\n"
+" sd t0,8(sp)\n"
+" sd ra,16(sp)\n"
+" call my_direct_func\n"
+" ld a0,0(sp)\n"
+" ld t0,8(sp)\n"
+" ld ra,16(sp)\n"
+" addi sp,sp,24\n"
+" jr t0\n"
+" .size my_tramp, .-my_tramp\n"
+" .popsection\n"
+);
+
+#endif /* CONFIG_RISCV */
+
#ifdef CONFIG_X86_64
#include <asm/ibt.h>
diff --git a/samples/ftrace/ftrace-direct-too.c b/samples/ftrace/ftrace-direct-too.c
index 6690468c5cc2..fe3b8c4f3336 100644
--- a/samples/ftrace/ftrace-direct-too.c
+++ b/samples/ftrace/ftrace-direct-too.c
@@ -17,6 +17,32 @@ void my_direct_func(struct vm_area_struct *vma,
extern void my_tramp(void *);
+#ifdef CONFIG_RISCV
+
+asm (" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp, @function\n"
+" .globl my_tramp\n"
+" my_tramp:\n"
+" addi sp,sp,-40\n"
+" sd a0,0(sp)\n"
+" sd a1,8(sp)\n"
+" sd a2,16(sp)\n"
+" sd t0,24(sp)\n"
+" sd ra,32(sp)\n"
+" call my_direct_func\n"
+" ld a0,0(sp)\n"
+" ld a1,8(sp)\n"
+" ld a2,16(sp)\n"
+" ld t0,24(sp)\n"
+" ld ra,32(sp)\n"
+" addi sp,sp,40\n"
+" jr t0\n"
+" .size my_tramp, .-my_tramp\n"
+" .popsection\n"
+);
+
+#endif /* CONFIG_RISCV */
+
#ifdef CONFIG_X86_64
#include <asm/ibt.h>
diff --git a/samples/ftrace/ftrace-direct.c b/samples/ftrace/ftrace-direct.c
index e8f1e440b9b8..0784024b6653 100644
--- a/samples/ftrace/ftrace-direct.c
+++ b/samples/ftrace/ftrace-direct.c
@@ -14,6 +14,28 @@ void my_direct_func(struct task_struct *p)
extern void my_tramp(void *);
+#ifdef CONFIG_RISCV
+
+asm (" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp, @function\n"
+" .globl my_tramp\n"
+" my_tramp:\n"
+" addi sp,sp,-24\n"
+" sd a0,0(sp)\n"
+" sd t0,8(sp)\n"
+" sd ra,16(sp)\n"
+" call my_direct_func\n"
+" ld a0,0(sp)\n"
+" ld t0,8(sp)\n"
+" ld ra,16(sp)\n"
+" addi sp,sp,24\n"
+" jr t0\n"
+" .size my_tramp, .-my_tramp\n"
+" .popsection\n"
+);
+
+#endif /* CONFIG_RISCV */
+
#ifdef CONFIG_X86_64
#include <asm/ibt.h>
--
2.20.1
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