From: Andi Kleen <[email protected]>
Add a description of the JIT interface in the perf symbol resolution
code. I reverse engineered the format from the source.
Signed-off-by: Andi Kleen <[email protected]>
Acked-by: Pekka Enberg <[email protected]>
Cc: Pekka Enberg <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
tools/perf/Documentation/jit-interface.txt | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
create mode 100644 tools/perf/Documentation/jit-interface.txt
diff --git a/tools/perf/Documentation/jit-interface.txt b/tools/perf/Documentation/jit-interface.txt
new file mode 100644
index 0000000..a8656f5
--- /dev/null
+++ b/tools/perf/Documentation/jit-interface.txt
@@ -0,0 +1,15 @@
+perf supports a simple JIT interface to resolve symbols for dynamic code generated
+by a JIT.
+
+The JIT has to write a /tmp/perf-%d.map (%d = pid of process) file
+
+This is a text file.
+
+Each line has the following format, fields separated with spaces:
+
+START SIZE symbolname
+
+START and SIZE are hex numbers without 0x.
+symbolname is the rest of the line, so it could contain special characters.
+
+The ownership of the file has to match the process.
--
1.7.1