[PATCH v2 0/1] perf jitdump: Add riscv64 support

[Eric Lin <eric.lin@sifive.com>]

This patch enable perf jitdump for riscv64 and it tested with V8 on qemu rv64.

Qemu rv64:
$ perf record -e cpu-clock -c 1000 -g -k mono ./d8_rv64 --perf-prof --no-write-protect-code-memory test.js
$ perf inject -j -i perf.data -o perf.data.jitted
$ perf report -i perf.data.jitted

Output:
 To display the perf.data header info, please use --header/--header-only options.

 Total Lost Samples: 0

 Samples: 87K of event 'cpu-clock'
 Event count (approx.): 87974000

 Children      Self  Command          Shared Object                Symbol

....
     0.28%     0.06%  d8_rv64          d8_rv64                      [.] _ZN2v88i
nternal6WasmJs7InstallEPNS0_7IsolateEb
     0.28%     0.00%  d8_rv64          d8_rv64                      [.] _ZN2v88i
nternal10ParserBaseINS0_6ParserEE22ParseLogicalExpressionEv
     0.28%     0.03%  d8_rv64          jitted-112-76.so             [.] Builtin:
InterpreterEntryTrampoline
     0.12%     0.00%  d8_rv64          d8_rv64                      [.] _ZN2v88i
nternal19ContextDeserializer11DeserializeEPNS0_7IsolateENS0_6HandleINS0_13JSGlob
alProxyEEENS_33DeserializeInternalFieldsCallbackE
     0.12%     0.01%  d8_rv64          jitted-112-651.so            [.] Builtin:
CEntry_Return1_DontSaveFPRegs_ArgvOnStack_NoBuiltinExit
....

Changed in v2:
 - Rebase on tag v5.18-rc2
 - Show perf jitdump commands and dump in the commit message.

Eric Lin (1):
  perf jitdump: Add riscv64 support.

 tools/perf/arch/riscv/Makefile | 1 +
 tools/perf/util/genelf.h       | 3 +++
 2 files changed, 4 insertions(+)

-- 
2.35.1