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ksym_tracer: Support read accesses independent of read/write.

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All of the infrastructure already exists to support read accesses
for platforms that support a read access independently of read/write
(such as in the case of the SuperH UBC). This just trivially hooks
up the read case by itself.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Prasad <prasad@linux.vnet.ibm.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jan Kiszka <jan.kiszka@web.de>
Cc: Jiri Slaby <jirislaby@gmail.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
LKML-Reference: <20091109083733.GA25848@linux-sh.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Paul Mundt 2009-11-09 17:37:34 +09:00 committed by Frederic Weisbecker
parent 30ff21e31f
commit 676c0dbe6e
1 changed files with 10 additions and 1 deletions
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11
kernel/trace/trace_ksym.c
View file

@ -136,6 +136,7 @@ static int ksym_trace_get_access_type(char *str)
access |= HW_BREAKPOINT_X; access |= HW_BREAKPOINT_X;
switch (access) { switch (access) {
case HW_BREAKPOINT_R:
case HW_BREAKPOINT_W: case HW_BREAKPOINT_W:
case HW_BREAKPOINT_W | HW_BREAKPOINT_R: case HW_BREAKPOINT_W | HW_BREAKPOINT_R:
return access; return access;
@ -239,7 +240,9 @@ static ssize_t ksym_trace_filter_read(struct file *filp, char __user *ubuf,
hlist_for_each_entry(entry, node, &ksym_filter_head, ksym_hlist) { hlist_for_each_entry(entry, node, &ksym_filter_head, ksym_hlist) {
ret = trace_seq_printf(s, "%pS:", (void *)entry->ksym_addr); ret = trace_seq_printf(s, "%pS:", (void *)entry->ksym_addr);
if (entry->type == HW_BREAKPOINT_W) if (entry->type == HW_BREAKPOINT_R)
ret = trace_seq_puts(s, "r--\n");
else if (entry->type == HW_BREAKPOINT_W)
ret = trace_seq_puts(s, "-w-\n"); ret = trace_seq_puts(s, "-w-\n");
else if (entry->type == (HW_BREAKPOINT_W | HW_BREAKPOINT_R)) else if (entry->type == (HW_BREAKPOINT_W | HW_BREAKPOINT_R))
ret = trace_seq_puts(s, "rw-\n"); ret = trace_seq_puts(s, "rw-\n");
@ -414,6 +417,9 @@ static enum print_line_t ksym_trace_output(struct trace_iterator *iter)
return TRACE_TYPE_PARTIAL_LINE; return TRACE_TYPE_PARTIAL_LINE;
switch (field->type) { switch (field->type) {
case HW_BREAKPOINT_R:
ret = trace_seq_printf(s, " R ");
break;
case HW_BREAKPOINT_W: case HW_BREAKPOINT_W:
ret = trace_seq_printf(s, " W "); ret = trace_seq_printf(s, " W ");
break; break;
@ -488,6 +494,9 @@ static int ksym_tracer_stat_show(struct seq_file *m, void *v)
access_type = entry->type; access_type = entry->type;
switch (access_type) { switch (access_type) {
case HW_BREAKPOINT_R:
seq_puts(m, " R ");
break;
case HW_BREAKPOINT_W: case HW_BREAKPOINT_W:
seq_puts(m, " W "); seq_puts(m, " W ");
break; break;