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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-20 19:55:50 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-20 19:55:50 +0100 |
commit | 6b38e2fb70b6682fd8f8cd24c03597e27fec3df3 (patch) | |
tree | cc460d290dd2d8582d8d39d6c39776f34a7b9c3f /samples | |
parent | Merge tag '5.16-rc1-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6 (diff) | |
parent | ftrace/samples: add s390 support for ftrace direct multi sample (diff) | |
download | linux-6b38e2fb70b6682fd8f8cd24c03597e27fec3df3.tar.xz linux-6b38e2fb70b6682fd8f8cd24c03597e27fec3df3.zip |
Merge tag 's390-5.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Heiko Carstens:
- Add missing Kconfig option for ftrace direct multi sample, so it can
be compiled again, and also add s390 support for this sample.
- Update Christian Borntraeger's email address.
- Various fixes for memory layout setup. Besides other this makes it
possible to load shared DCSS segments again.
- Fix copy to user space of swapped kdump oldmem.
- Remove -mstack-guard and -mstack-size compile options when building
vdso binaries. This can happen when CONFIG_VMAP_STACK is disabled and
results in broken vdso code which causes more or less random
exceptions. Also remove the not needed -nostdlib option.
- Fix memory leak on cpu hotplug and return code handling in kexec
code.
- Wire up futex_waitv system call.
- Replace snprintf with sysfs_emit where appropriate.
* tag 's390-5.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
ftrace/samples: add s390 support for ftrace direct multi sample
ftrace/samples: add missing Kconfig option for ftrace direct multi sample
MAINTAINERS: update email address of Christian Borntraeger
s390/kexec: fix memory leak of ipl report buffer
s390/kexec: fix return code handling
s390/dump: fix copying to user-space of swapped kdump oldmem
s390: wire up sys_futex_waitv system call
s390/vdso: filter out -mstack-guard and -mstack-size
s390/vdso: remove -nostdlib compiler flag
s390: replace snprintf in show functions with sysfs_emit
s390/boot: simplify and fix kernel memory layout setup
s390/setup: re-arrange memblock setup
s390/setup: avoid using memblock_enforce_memory_limit
s390/setup: avoid reserving memory above identity mapping
Diffstat (limited to 'samples')
-rw-r--r-- | samples/Kconfig | 11 | ||||
-rw-r--r-- | samples/Makefile | 2 | ||||
-rw-r--r-- | samples/ftrace/Makefile | 2 | ||||
-rw-r--r-- | samples/ftrace/ftrace-direct-multi.c | 30 |
4 files changed, 42 insertions, 3 deletions
diff --git a/samples/Kconfig b/samples/Kconfig index bec3528aa2de..43d2e9aa557f 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -31,6 +31,15 @@ config SAMPLE_FTRACE_DIRECT This builds an ftrace direct function example that hooks to wake_up_process and prints the parameters. +config SAMPLE_FTRACE_DIRECT_MULTI + tristate "Build register_ftrace_direct_multi() example" + depends on DYNAMIC_FTRACE_WITH_DIRECT_CALLS && m + depends on HAVE_SAMPLE_FTRACE_DIRECT_MULTI + help + This builds an ftrace direct function example + that hooks to wake_up_process and schedule, and prints + the function addresses. + config SAMPLE_TRACE_ARRAY tristate "Build sample module for kernel access to Ftrace instancess" depends on EVENT_TRACING && m @@ -237,5 +246,5 @@ endif # SAMPLES config HAVE_SAMPLE_FTRACE_DIRECT bool -config HAVE_SAMPLE_FTRACE_MULTI_DIRECT +config HAVE_SAMPLE_FTRACE_DIRECT_MULTI bool diff --git a/samples/Makefile b/samples/Makefile index b7b98307c2b4..4bcd6b93bffa 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -22,7 +22,7 @@ subdir-$(CONFIG_SAMPLE_TIMER) += timers obj-$(CONFIG_SAMPLE_TRACE_EVENTS) += trace_events/ obj-$(CONFIG_SAMPLE_TRACE_PRINTK) += trace_printk/ obj-$(CONFIG_SAMPLE_FTRACE_DIRECT) += ftrace/ -obj-$(CONFIG_SAMPLE_FTRACE_MULTI_DIRECT) += ftrace/ +obj-$(CONFIG_SAMPLE_FTRACE_DIRECT_MULTI) += ftrace/ obj-$(CONFIG_SAMPLE_TRACE_ARRAY) += ftrace/ subdir-$(CONFIG_SAMPLE_UHID) += uhid obj-$(CONFIG_VIDEO_PCI_SKELETON) += v4l/ diff --git a/samples/ftrace/Makefile b/samples/ftrace/Makefile index e8a3f8520a44..b9198e2eef28 100644 --- a/samples/ftrace/Makefile +++ b/samples/ftrace/Makefile @@ -3,7 +3,7 @@ obj-$(CONFIG_SAMPLE_FTRACE_DIRECT) += ftrace-direct.o obj-$(CONFIG_SAMPLE_FTRACE_DIRECT) += ftrace-direct-too.o obj-$(CONFIG_SAMPLE_FTRACE_DIRECT) += ftrace-direct-modify.o -obj-$(CONFIG_SAMPLE_FTRACE_MULTI_DIRECT) += ftrace-direct-multi.o +obj-$(CONFIG_SAMPLE_FTRACE_DIRECT_MULTI) += ftrace-direct-multi.o CFLAGS_sample-trace-array.o := -I$(src) obj-$(CONFIG_SAMPLE_TRACE_ARRAY) += sample-trace-array.o diff --git a/samples/ftrace/ftrace-direct-multi.c b/samples/ftrace/ftrace-direct-multi.c index b6d7806b400e..2fafc9afcbf0 100644 --- a/samples/ftrace/ftrace-direct-multi.c +++ b/samples/ftrace/ftrace-direct-multi.c @@ -4,6 +4,7 @@ #include <linux/mm.h> /* for handle_mm_fault() */ #include <linux/ftrace.h> #include <linux/sched/stat.h> +#include <asm/asm-offsets.h> extern void my_direct_func(unsigned long ip); @@ -14,6 +15,8 @@ void my_direct_func(unsigned long ip) extern void my_tramp(void *); +#ifdef CONFIG_X86_64 + asm ( " .pushsection .text, \"ax\", @progbits\n" " .type my_tramp, @function\n" @@ -31,6 +34,33 @@ 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" +" lgr %r2,%r0\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 struct ftrace_ops direct; static int __init ftrace_direct_multi_init(void) |