Merge tag 'trace-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:
 "This release has a few updates:

   - STM can hook into the function tracer
   - Function filtering now supports more advance glob matching
   - Ftrace selftests updates and added tests
   - Softirq tag in traces now show only softirqs
   - ARM nop added to non traced locations at compile time
   - New trace_marker_raw file that allows for binary input
   - Optimizations to the ring buffer
   - Removal of kmap in trace_marker
   - Wakeup and irqsoff tracers now adhere to the set_graph_notrace file
   - Other various fixes and clean ups"

* tag 'trace-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (42 commits)
  selftests: ftrace: Shift down default message verbosity
  kprobes/trace: Fix kprobe selftest for newer gcc
  tracing/kprobes: Add a helper method to return number of probe hits
  tracing/rb: Init the CPU mask on allocation
  tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results
  tracing/fgraph: Have wakeup and irqsoff tracers ignore graph functions too
  fgraph: Handle a case where a tracer ignores set_graph_notrace
  tracing: Replace kmap with copy_from_user() in trace_marker writing
  ftrace/x86_32: Set ftrace_stub to weak to prevent gcc from using short jumps to it
  tracing: Allow benchmark to be enabled at early_initcall()
  tracing: Have system enable return error if one of the events fail
  tracing: Do not start benchmark on boot up
  tracing: Have the reg function allow to fail
  ring-buffer: Force rb_end_commit() and rb_set_commit_to_write() inline
  ring-buffer: Froce rb_update_write_stamp() to be inlined
  ring-buffer: Force inline of hotpath helper functions
  tracing: Make __buffer_unlock_commit() always_inline
  tracing: Make tracepoint_printk a static_key
  ring-buffer: Always inline rb_event_data()
  ring-buffer: Make rb_reserve_next_event() always inlined
  ...

1 files changed, 65 insertions, 0 deletions

diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c
index 5423a58..aeb3422 100644
--- a/scripts/recordmcount.c
+++ b/scripts/recordmcount.c
@@ -213,6 +213,59 @@ static int make_nop_x86(void *map, size_t const offset)
 	return 0;
 }
 
+static unsigned char ideal_nop4_arm_le[4] = { 0x00, 0x00, 0xa0, 0xe1 }; /* mov r0, r0 */
+static unsigned char ideal_nop4_arm_be[4] = { 0xe1, 0xa0, 0x00, 0x00 }; /* mov r0, r0 */
+static unsigned char *ideal_nop4_arm;
+
+static unsigned char bl_mcount_arm_le[4] = { 0xfe, 0xff, 0xff, 0xeb }; /* bl */
+static unsigned char bl_mcount_arm_be[4] = { 0xeb, 0xff, 0xff, 0xfe }; /* bl */
+static unsigned char *bl_mcount_arm;
+
+static unsigned char push_arm_le[4] = { 0x04, 0xe0, 0x2d, 0xe5 }; /* push {lr} */
+static unsigned char push_arm_be[4] = { 0xe5, 0x2d, 0xe0, 0x04 }; /* push {lr} */
+static unsigned char *push_arm;
+
+static unsigned char ideal_nop2_thumb_le[2] = { 0x00, 0xbf }; /* nop */
+static unsigned char ideal_nop2_thumb_be[2] = { 0xbf, 0x00 }; /* nop */
+static unsigned char *ideal_nop2_thumb;
+
+static unsigned char push_bl_mcount_thumb_le[6] = { 0x00, 0xb5, 0xff, 0xf7, 0xfe, 0xff }; /* push {lr}, bl */
+static unsigned char push_bl_mcount_thumb_be[6] = { 0xb5, 0x00, 0xf7, 0xff, 0xff, 0xfe }; /* push {lr}, bl */
+static unsigned char *push_bl_mcount_thumb;
+
+static int make_nop_arm(void *map, size_t const offset)
+{
+	char *ptr;
+	int cnt = 1;
+	int nop_size;
+	size_t off = offset;
+
+	ptr = map + offset;
+	if (memcmp(ptr, bl_mcount_arm, 4) == 0) {
+		if (memcmp(ptr - 4, push_arm, 4) == 0) {
+			off -= 4;
+			cnt = 2;
+		}
+		ideal_nop = ideal_nop4_arm;
+		nop_size = 4;
+	} else if (memcmp(ptr - 2, push_bl_mcount_thumb, 6) == 0) {
+		cnt = 3;
+		nop_size = 2;
+		off -= 2;
+		ideal_nop = ideal_nop2_thumb;
+	} else
+		return -1;
+
+	/* Convert to nop */
+	ulseek(fd_map, off, SEEK_SET);
+
+	do {
+		uwrite(fd_map, ideal_nop, nop_size);
+	} while (--cnt > 0);
+
+	return 0;
+}
+
 static unsigned char ideal_nop4_arm64[4] = {0x1f, 0x20, 0x03, 0xd5};
 static int make_nop_arm64(void *map, size_t const offset)
 {
@@ -430,6 +483,11 @@ do_file(char const *const fname)
 			w2 = w2rev;
 			w8 = w8rev;
 		}
+		ideal_nop4_arm = ideal_nop4_arm_le;
+		bl_mcount_arm = bl_mcount_arm_le;
+		push_arm = push_arm_le;
+		ideal_nop2_thumb = ideal_nop2_thumb_le;
+		push_bl_mcount_thumb = push_bl_mcount_thumb_le;
 		break;
 	case ELFDATA2MSB:
 		if (*(unsigned char const *)&endian != 0) {
@@ -438,6 +496,11 @@ do_file(char const *const fname)
 			w2 = w2rev;
 			w8 = w8rev;
 		}
+		ideal_nop4_arm = ideal_nop4_arm_be;
+		bl_mcount_arm = bl_mcount_arm_be;
+		push_arm = push_arm_be;
+		ideal_nop2_thumb = ideal_nop2_thumb_be;
+		push_bl_mcount_thumb = push_bl_mcount_thumb_be;
 		break;
 	}  /* end switch */
 	if (memcmp(ELFMAG, ehdr->e_ident, SELFMAG) != 0
@@ -463,6 +526,8 @@ do_file(char const *const fname)
 		break;
 	case EM_ARM:	 reltype = R_ARM_ABS32;
 			 altmcount = "__gnu_mcount_nc";
+			 make_nop = make_nop_arm;
+			 rel_type_nop = R_ARM_NONE;
 			 break;
 	case EM_AARCH64:
 			reltype = R_AARCH64_ABS64;