From c316eb4460463b6dd1aee6d241cb20323a0030aa Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Tue, 12 Oct 2021 15:38:01 +0200 Subject: samples: add HAVE_SAMPLE_FTRACE_DIRECT config option Add HAVE_SAMPLE_FTRACE_DIRECT config option which can be selected by architectures which have support for ftrace direct call samples. Acked-by: Ilya Leoshkevich Reviewed-by: Sven Schnelle Signed-off-by: Heiko Carstens Acked-by: Steven Rostedt (VMware) Link: https://lore.kernel.org/r/20211012133802.2460757-4-hca@linux.ibm.com Signed-off-by: Vasily Gorbik --- samples/Kconfig | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'samples') diff --git a/samples/Kconfig b/samples/Kconfig index b0503ef058d3..501f66309118 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -26,7 +26,7 @@ config SAMPLE_TRACE_PRINTK config SAMPLE_FTRACE_DIRECT tristate "Build register_ftrace_direct() example" depends on DYNAMIC_FTRACE_WITH_DIRECT_CALLS && m - depends on X86_64 # has x86_64 inlined asm + depends on HAVE_SAMPLE_FTRACE_DIRECT help This builds an ftrace direct function example that hooks to wake_up_process and prints the parameters. @@ -224,3 +224,6 @@ config SAMPLE_WATCH_QUEUE sb_notify() syscalls and the KEYCTL_WATCH_KEY keyctl() function. endif # SAMPLES + +config HAVE_SAMPLE_FTRACE_DIRECT + bool -- cgit From 1254cfbc5f97bc1afd019c30c6ca1d4ddfa127eb Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Tue, 12 Oct 2021 15:38:02 +0200 Subject: samples: add s390 support for ftrace direct call samples Add s390 support for ftrace direct call samples, which also enables ftrace direct call selftests within ftrace selftests. Acked-by: Ilya Leoshkevich Reviewed-by: Sven Schnelle Signed-off-by: Heiko Carstens Acked-by: Steven Rostedt (VMware) Link: https://lore.kernel.org/r/20211012133802.2460757-5-hca@linux.ibm.com Signed-off-by: Vasily Gorbik --- samples/ftrace/ftrace-direct-modify.c | 44 +++++++++++++++++++++++++++++++++++ samples/ftrace/ftrace-direct-too.c | 28 ++++++++++++++++++++++ samples/ftrace/ftrace-direct.c | 28 ++++++++++++++++++++++ 3 files changed, 100 insertions(+) (limited to 'samples') diff --git a/samples/ftrace/ftrace-direct-modify.c b/samples/ftrace/ftrace-direct-modify.c index 5b9a09957c6e..690e4a9ff333 100644 --- a/samples/ftrace/ftrace-direct-modify.c +++ b/samples/ftrace/ftrace-direct-modify.c @@ -2,6 +2,7 @@ #include #include #include +#include void my_direct_func1(void) { @@ -18,6 +19,8 @@ extern void my_tramp2(void *); static unsigned long my_ip = (unsigned long)schedule; +#ifdef CONFIG_X86_64 + asm ( " .pushsection .text, \"ax\", @progbits\n" " .type my_tramp1, @function\n" @@ -41,6 +44,47 @@ asm ( " .popsection\n" ); +#endif /* CONFIG_X86_64 */ + +#ifdef CONFIG_S390 + +asm ( +" .pushsection .text, \"ax\", @progbits\n" +" .type my_tramp1, @function\n" +" .globl my_tramp1\n" +" my_tramp1:" +" lgr %r1,%r15\n" +" stmg %r0,%r5,"__stringify(__SF_GPRS)"(%r15)\n" +" stg %r14,"__stringify(__SF_GPRS+8*8)"(%r15)\n" +" aghi %r15,"__stringify(-STACK_FRAME_OVERHEAD)"\n" +" stg %r1,"__stringify(__SF_BACKCHAIN)"(%r15)\n" +" brasl %r14,my_direct_func1\n" +" aghi %r15,"__stringify(STACK_FRAME_OVERHEAD)"\n" +" lmg %r0,%r5,"__stringify(__SF_GPRS)"(%r15)\n" +" lg %r14,"__stringify(__SF_GPRS+8*8)"(%r15)\n" +" lgr %r1,%r0\n" +" br %r1\n" +" .size my_tramp1, .-my_tramp1\n" +" .type my_tramp2, @function\n" +" .globl my_tramp2\n" +" my_tramp2:" +" lgr %r1,%r15\n" +" stmg %r0,%r5,"__stringify(__SF_GPRS)"(%r15)\n" +" stg %r14,"__stringify(__SF_GPRS+8*8)"(%r15)\n" +" aghi %r15,"__stringify(-STACK_FRAME_OVERHEAD)"\n" +" stg %r1,"__stringify(__SF_BACKCHAIN)"(%r15)\n" +" brasl %r14,my_direct_func2\n" +" aghi %r15,"__stringify(STACK_FRAME_OVERHEAD)"\n" +" lmg %r0,%r5,"__stringify(__SF_GPRS)"(%r15)\n" +" lg %r14,"__stringify(__SF_GPRS+8*8)"(%r15)\n" +" lgr %r1,%r0\n" +" br %r1\n" +" .size my_tramp2, .-my_tramp2\n" +" .popsection\n" +); + +#endif /* CONFIG_S390 */ + static unsigned long my_tramp = (unsigned long)my_tramp1; static unsigned long tramps[2] = { (unsigned long)my_tramp1, diff --git a/samples/ftrace/ftrace-direct-too.c b/samples/ftrace/ftrace-direct-too.c index 3f0079c9bd6f..6e0de725bf22 100644 --- a/samples/ftrace/ftrace-direct-too.c +++ b/samples/ftrace/ftrace-direct-too.c @@ -3,6 +3,7 @@ #include /* for handle_mm_fault() */ #include +#include void my_direct_func(struct vm_area_struct *vma, unsigned long address, unsigned int flags) @@ -13,6 +14,8 @@ void my_direct_func(struct vm_area_struct *vma, extern void my_tramp(void *); +#ifdef CONFIG_X86_64 + asm ( " .pushsection .text, \"ax\", @progbits\n" " .type my_tramp, @function\n" @@ -33,6 +36,31 @@ asm ( " .popsection\n" ); +#endif /* CONFIG_X86_64 */ + +#ifdef CONFIG_S390 + +asm ( +" .pushsection .text, \"ax\", @progbits\n" +" .type my_tramp, @function\n" +" .globl my_tramp\n" +" my_tramp:" +" lgr %r1,%r15\n" +" stmg %r0,%r5,"__stringify(__SF_GPRS)"(%r15)\n" +" stg %r14,"__stringify(__SF_GPRS+8*8)"(%r15)\n" +" aghi %r15,"__stringify(-STACK_FRAME_OVERHEAD)"\n" +" stg %r1,"__stringify(__SF_BACKCHAIN)"(%r15)\n" +" brasl %r14,my_direct_func\n" +" aghi %r15,"__stringify(STACK_FRAME_OVERHEAD)"\n" +" lmg %r0,%r5,"__stringify(__SF_GPRS)"(%r15)\n" +" lg %r14,"__stringify(__SF_GPRS+8*8)"(%r15)\n" +" lgr %r1,%r0\n" +" br %r1\n" +" .size my_tramp, .-my_tramp\n" +" .popsection\n" +); + +#endif /* CONFIG_S390 */ static int __init ftrace_direct_init(void) { diff --git a/samples/ftrace/ftrace-direct.c b/samples/ftrace/ftrace-direct.c index a2729d1ef17f..a30aa42ec76a 100644 --- a/samples/ftrace/ftrace-direct.c +++ b/samples/ftrace/ftrace-direct.c @@ -3,6 +3,7 @@ #include /* for wake_up_process() */ #include +#include void my_direct_func(struct task_struct *p) { @@ -11,6 +12,8 @@ void my_direct_func(struct task_struct *p) extern void my_tramp(void *); +#ifdef CONFIG_X86_64 + asm ( " .pushsection .text, \"ax\", @progbits\n" " .type my_tramp, @function\n" @@ -27,6 +30,31 @@ asm ( " .popsection\n" ); +#endif /* CONFIG_X86_64 */ + +#ifdef CONFIG_S390 + +asm ( +" .pushsection .text, \"ax\", @progbits\n" +" .type my_tramp, @function\n" +" .globl my_tramp\n" +" my_tramp:" +" lgr %r1,%r15\n" +" stmg %r0,%r5,"__stringify(__SF_GPRS)"(%r15)\n" +" stg %r14,"__stringify(__SF_GPRS+8*8)"(%r15)\n" +" aghi %r15,"__stringify(-STACK_FRAME_OVERHEAD)"\n" +" stg %r1,"__stringify(__SF_BACKCHAIN)"(%r15)\n" +" brasl %r14,my_direct_func\n" +" aghi %r15,"__stringify(STACK_FRAME_OVERHEAD)"\n" +" lmg %r0,%r5,"__stringify(__SF_GPRS)"(%r15)\n" +" lg %r14,"__stringify(__SF_GPRS+8*8)"(%r15)\n" +" lgr %r1,%r0\n" +" br %r1\n" +" .size my_tramp, .-my_tramp\n" +" .popsection\n" +); + +#endif /* CONFIG_S390 */ static int __init ftrace_direct_init(void) { -- cgit