From 0fe7d7e9761ec7e23350b5543ddac470bb3cde1e Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Thu, 9 Aug 2012 08:31:00 -0700 Subject: [PATCH] perf symbols: Add description of JIT interface 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 Acked-by: Pekka Enberg Cc: Pekka Enberg Link: http://lkml.kernel.org/r/1344526260-18721-1-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/jit-interface.txt | 15 +++++++++++++++ 1 file changed, 15 insertions(+) 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 000000000000..a8656f564915 --- /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.