Hi Arnaldo,
On Mon, Oct 23, 2023 at 9:38 AM Arnaldo Carvalho de Melo
<acme@xxxxxxxxxx> wrote:
>
> Em Wed, Oct 11, 2023 at 08:50:36PM -0700, Namhyung Kim escreveu:
> > The annotate_get_insn_location() is to get the detailed information of
> > instruction locations like registers and offset. It has source and
> > target operands locations in an array. Each operand can have a
> > register and an offset. The offset is meaningful when mem_ref flag is
> > set.
>
> This needs to be enclosed in HAVE_DWARF_SUPPORT, as the build is failing
> in systems where this isn't available, see patch below.
Thanks for the test and the patch, will add it to v2.
Namhyung
>
> CC /tmp/build/perf/arch/x86/util/pmu.o
> util/annotate.c: In function 'extract_reg_offset':
> util/annotate.c:3537:24: error: implicit declaration of function 'get_dwarf_regnum' [-Werror=implicit-function-declaration]
> 3537 | op_loc->reg1 = get_dwarf_regnum(regname, 0);
> | ^~~~~~~~~~~~~~~~
> CC /tmp/build/perf/tests/vmlinux-kallsyms.o
>
> I tested it with 'make NO_DWARF=1'
>
> - Arnaldo
>
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index 9d653a1e84ce4889..b998c81c89be04fc 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -3486,6 +3486,7 @@ int annotate_check_args(struct annotation_options *args)
> return 0;
> }
>
> +#ifdef HAVE_DWARF_SUPPORT
> /*
> * Get register number and access offset from the given instruction.
> * It assumes AT&T x86 asm format like OFFSET(REG). Maybe it needs
> @@ -3591,3 +3592,4 @@ int annotate_get_insn_location(struct arch *arch, struct disasm_line *dl,
>
> return 0;
> }
> +#endif // HAVE_DWARF_SUPPORT
> diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
> index 4adda492233d2742..484be346a279c481 100644
> --- a/tools/perf/util/annotate.h
> +++ b/tools/perf/util/annotate.h
> @@ -437,6 +437,7 @@ int annotate_parse_percent_type(const struct option *opt, const char *_str,
>
> int annotate_check_args(struct annotation_options *args);
>
> +#ifdef HAVE_DWARF_SUPPORT
> /**
> * struct annotated_op_loc - Location info of instruction operand
> * @reg: Register in the operand
> @@ -473,4 +474,5 @@ struct annotated_insn_loc {
> int annotate_get_insn_location(struct arch *arch, struct disasm_line *dl,
> struct annotated_insn_loc *loc);
>
> +#endif /* HAVE_DWARF_SUPPORT */
> #endif /* __PERF_ANNOTATE_H */
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