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c0192c |
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c0192c |
Fix the extension trace.so for RHEL7.6, which moved
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c0192c |
ftrace_event_call.data into an anonymous union, and the
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c0192c |
previous offset has changed, so the trace.so extension
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c0192c |
module fails to load, indicating "no commands registered:
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c0192c |
shared object unloaded".
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c0192c |
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c0192c |
--- crash-trace-command-2.0/trace.c.orig
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c0192c |
+++ crash-trace-command-2.0/trace.c
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c0192c |
@@ -853,8 +853,18 @@ static int syscall_get_enter_fields(ulon
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c0192c |
inited = 1;
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c0192c |
data_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "data"),
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c0192c |
MEMBER_OFFSET("trace_event_call", "data"));
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c0192c |
- if (data_offset < 0)
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c0192c |
- return -1;
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c0192c |
+ if (data_offset < 0) {
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c0192c |
+ /*
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c0192c |
+ * rhel-7.6 moved the .data member into an anonymous union.
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c0192c |
+ */
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c0192c |
+ if (MEMBER_EXISTS("ftrace_event_call", "rh_data") &&
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c0192c |
+ MEMBER_EXISTS("ftrace_event_data", "data")) {
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c0192c |
+ data_offset = MEMBER_OFFSET("ftrace_event_call", "rh_data") +
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c0192c |
+ MEMBER_OFFSET("ftrace_event_data", "data");
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c0192c |
+ inited = 2;
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c0192c |
+ } else
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c0192c |
+ return -1;
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c0192c |
+ }
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c0192c |
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c0192c |
enter_fields_offset = MEMBER_OFFSET("syscall_metadata", "enter_fields");
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c0192c |
if (enter_fields_offset < 0)
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c0192c |
@@ -868,6 +878,12 @@ work:
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c0192c |
"read ftrace_event_call data", RETURN_ON_ERROR))
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c0192c |
return -1;
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c0192c |
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c0192c |
+ if (inited == 2) {
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c0192c |
+ if (!readmem(metadata, KVADDR, &metadata, sizeof(metadata),
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c0192c |
+ "read ftrace_event_call data (indirect rh_data)", RETURN_ON_ERROR))
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c0192c |
+ return -1;
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c0192c |
+ }
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c0192c |
+
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c0192c |
*fields = metadata + enter_fields_offset;
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c0192c |
return 0;
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c0192c |
}
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