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samples: ftrace: Add RISC-V support for SAMPLE_FTRACE_DIRECT[_MULTI] 

Add RISC-V variants of the ftrace-direct* samples.

Tested-by: Evgenii Shatokhin <e.shatokhin@yadro.com>
Signed-off-by: Song Shuai <suagrfillet@gmail.com>
Tested-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Guo Ren <guoren@kernel.org>
Acked-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://lore.kernel.org/r/20231130121531.1178502-5-bjorn@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Song Shuai 2023-11-30 13:15:31 +01:00 committed by Palmer Dabbelt
parent 196c79f19a
commit 629291dd84
No known key found for this signature in database
GPG Key ID: 2E1319F35FBB1889
6 changed files with 155 additions and 0 deletions
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2
arch/riscv/Kconfig
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@ -142,6 +142,8 @@ config RISCV
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RETHOOK if !XIP_KERNEL
select HAVE_RSEQ
select HAVE_SAMPLE_FTRACE_DIRECT
select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
select HAVE_STACKPROTECTOR
select HAVE_SYSCALL_TRACEPOINTS
select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU

35
samples/ftrace/ftrace-direct-modify.c
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@ -24,6 +24,41 @@ extern void my_tramp2(void *);
static unsigned long my_ip = (unsigned long)schedule;
#ifdef CONFIG_RISCV
#include <asm/asm.h>
asm (
" .pushsection .text, \"ax\", @progbits\n"
" .type my_tramp1, @function\n"
" .globl my_tramp1\n"
" my_tramp1:\n"
" addi sp,sp,-2*"SZREG"\n"
" "REG_S" t0,0*"SZREG"(sp)\n"
" "REG_S" ra,1*"SZREG"(sp)\n"
" call my_direct_func1\n"
" "REG_L" t0,0*"SZREG"(sp)\n"
" "REG_L" ra,1*"SZREG"(sp)\n"
" addi sp,sp,2*"SZREG"\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,-2*"SZREG"\n"
" "REG_S" t0,0*"SZREG"(sp)\n"
" "REG_S" ra,1*"SZREG"(sp)\n"
" call my_direct_func2\n"
" "REG_L" t0,0*"SZREG"(sp)\n"
" "REG_L" ra,1*"SZREG"(sp)\n"
" addi sp,sp,2*"SZREG"\n"
" jr t0\n"
" .size my_tramp2, .-my_tramp2\n"
" .popsection\n"
);
#endif /* CONFIG_RISCV */
#ifdef CONFIG_X86_64
#include <asm/ibt.h>

41
samples/ftrace/ftrace-direct-multi-modify.c
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@ -22,6 +22,47 @@ void my_direct_func2(unsigned long ip)
extern void my_tramp1(void *);
extern void my_tramp2(void *);
#ifdef CONFIG_RISCV
#include <asm/asm.h>
asm (
" .pushsection .text, \"ax\", @progbits\n"
" .type my_tramp1, @function\n"
" .globl my_tramp1\n"
" my_tramp1:\n"
" addi sp,sp,-3*"SZREG"\n"
" "REG_S" a0,0*"SZREG"(sp)\n"
" "REG_S" t0,1*"SZREG"(sp)\n"
" "REG_S" ra,2*"SZREG"(sp)\n"
" mv a0,t0\n"
" call my_direct_func1\n"
" "REG_L" a0,0*"SZREG"(sp)\n"
" "REG_L" t0,1*"SZREG"(sp)\n"
" "REG_L" ra,2*"SZREG"(sp)\n"
" addi sp,sp,3*"SZREG"\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,-3*"SZREG"\n"
" "REG_S" a0,0*"SZREG"(sp)\n"
" "REG_S" t0,1*"SZREG"(sp)\n"
" "REG_S" ra,2*"SZREG"(sp)\n"
" mv a0,t0\n"
" call my_direct_func2\n"
" "REG_L" a0,0*"SZREG"(sp)\n"
" "REG_L" t0,1*"SZREG"(sp)\n"
" "REG_L" ra,2*"SZREG"(sp)\n"
" addi sp,sp,3*"SZREG"\n"
" jr t0\n"
" .size my_tramp2, .-my_tramp2\n"
" .popsection\n"
);
#endif /* CONFIG_RISCV */
#ifdef CONFIG_X86_64
#include <asm/ibt.h>

25
samples/ftrace/ftrace-direct-multi.c
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@ -17,6 +17,31 @@ void my_direct_func(unsigned long ip)
extern void my_tramp(void *);
#ifdef CONFIG_RISCV
#include <asm/asm.h>
asm (
" .pushsection .text, \"ax\", @progbits\n"
" .type my_tramp, @function\n"
" .globl my_tramp\n"
" my_tramp:\n"
" addi sp,sp,-3*"SZREG"\n"
" "REG_S" a0,0*"SZREG"(sp)\n"
" "REG_S" t0,1*"SZREG"(sp)\n"
" "REG_S" ra,2*"SZREG"(sp)\n"
" mv a0,t0\n"
" call my_direct_func\n"
" "REG_L" a0,0*"SZREG"(sp)\n"
" "REG_L" t0,1*"SZREG"(sp)\n"
" "REG_L" ra,2*"SZREG"(sp)\n"
" addi sp,sp,3*"SZREG"\n"
" jr t0\n"
" .size my_tramp, .-my_tramp\n"
" .popsection\n"
);
#endif /* CONFIG_RISCV */
#ifdef CONFIG_X86_64
#include <asm/ibt.h>

28
samples/ftrace/ftrace-direct-too.c
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@ -19,6 +19,34 @@ void my_direct_func(struct vm_area_struct *vma, unsigned long address,
extern void my_tramp(void *);
#ifdef CONFIG_RISCV
#include <asm/asm.h>
asm (
" .pushsection .text, \"ax\", @progbits\n"
" .type my_tramp, @function\n"
" .globl my_tramp\n"
" my_tramp:\n"
" addi sp,sp,-5*"SZREG"\n"
" "REG_S" a0,0*"SZREG"(sp)\n"
" "REG_S" a1,1*"SZREG"(sp)\n"
" "REG_S" a2,2*"SZREG"(sp)\n"
" "REG_S" t0,3*"SZREG"(sp)\n"
" "REG_S" ra,4*"SZREG"(sp)\n"
" call my_direct_func\n"
" "REG_L" a0,0*"SZREG"(sp)\n"
" "REG_L" a1,1*"SZREG"(sp)\n"
" "REG_L" a2,2*"SZREG"(sp)\n"
" "REG_L" t0,3*"SZREG"(sp)\n"
" "REG_L" ra,4*"SZREG"(sp)\n"
" addi sp,sp,5*"SZREG"\n"
" jr t0\n"
" .size my_tramp, .-my_tramp\n"
" .popsection\n"
);
#endif /* CONFIG_RISCV */
#ifdef CONFIG_X86_64
#include <asm/ibt.h>

24
samples/ftrace/ftrace-direct.c
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@ -16,6 +16,30 @@ void my_direct_func(struct task_struct *p)
extern void my_tramp(void *);
#ifdef CONFIG_RISCV
#include <asm/asm.h>
asm (
" .pushsection .text, \"ax\", @progbits\n"
" .type my_tramp, @function\n"
" .globl my_tramp\n"
" my_tramp:\n"
" addi sp,sp,-3*"SZREG"\n"
" "REG_S" a0,0*"SZREG"(sp)\n"
" "REG_S" t0,1*"SZREG"(sp)\n"
" "REG_S" ra,2*"SZREG"(sp)\n"
" call my_direct_func\n"
" "REG_L" a0,0*"SZREG"(sp)\n"
" "REG_L" t0,1*"SZREG"(sp)\n"
" "REG_L" ra,2*"SZREG"(sp)\n"
" addi sp,sp,3*"SZREG"\n"
" jr t0\n"
" .size my_tramp, .-my_tramp\n"
" .popsection\n"
);
#endif /* CONFIG_RISCV */
#ifdef CONFIG_X86_64
#include <asm/ibt.h>