On Fri, Feb 26, 2016 at 04:32:08PM -0800, Andi Kleen wrote: > From: Andi Kleen <a...@linux.intel.com> > > When dumping PT traces with perf script it is very useful to see the > assembler for each sample, so that it is easily possible to follow > the control flow. > > As using objdump is difficult and inefficient from perf script this > patch uses the udis86 library to implement assembler output. > The library can be downloaded from http://udis86.sourceforge.net/ > > The library is probed as an external dependency in the usual way. Then perf > script calls into it when needed, and handles callbacks to resolve > symbols. > > % perf record -e intel_pt//u true > % perf script -F sym,symoff,ip,asm --itrace=i0ns | head > 7fc7188b4190 _start+0x0 mov %rsp, %rdi > 7fc7188b4193 _start+0x3 call _dl_start > 7fc7188b7710 _dl_start+0x0 push %rbp > 7fc7188b7711 _dl_start+0x1 mov %rsp, %rbp > 7fc7188b7714 _dl_start+0x4 push %r15 > 7fc7188b7716 _dl_start+0x6 push %r14 > 7fc7188b7718 _dl_start+0x8 push %r13 > 7fc7188b771a _dl_start+0xa push %r12 > 7fc7188b771c _dl_start+0xc mov %rdi, %r12 > 7fc7188b771f _dl_start+0xf push %rbx > > Current issues: > - Some jump references do not get resolved to symbols. > - udis86 release does not support STAC/CLAC, which are used in the kernel, > but there is a pending patch for it. > > Cc: adrian.hun...@intel.com > Signed-off-by: Andi Kleen <a...@linux.intel.com> > --- > tools/build/Makefile.feature | 6 +- > tools/build/feature/Makefile | 8 ++- > tools/build/feature/test-all.c | 5 ++ > tools/build/feature/test-udis86.c | 8 +++
hi, could you please split the udis86 detection from the rest? thanks, jirka > tools/perf/Documentation/perf-script.txt | 4 +- > tools/perf/builtin-script.c | 108 > +++++++++++++++++++++++++++++-- > tools/perf/config/Makefile | 5 ++ > 7 files changed, 134 insertions(+), 10 deletions(-) > create mode 100644 tools/build/feature/test-udis86.c SNIP
