Re: [PATCH 19/27] perf tools: Introduce regs_query_register_offset() for x86

[Arnaldo Carvalho de Melo]

Em Sun, Sep 06, 2015 at 07:13:35AM +0000, Wang Nan escreveu:
> regs_query_register_offset() is a helper function which converts
> register name like "%rax" to offset of a register in 'struct pt_regs',
> which is required by BPF prologue generator. Since the function is
> identical, try to reuse the code in arch/x86/kernel/ptrace.c.
> 
> Comment inside dwarf-regs.c list the differences between this
> implementation and kernel code.
> 
> get_arch_regstr() switches to regoffset_table and the old string table
> is dropped.

Trying to cherry pick this one, but found this problem, trying to fix by
adding the prototype somewhere...


[acme@zoo linux]$ m
make: Entering directory '/home/git/linux/tools/perf'
  BUILD:   Doing 'make -j4' parallel build
  CC       /tmp/build/perf/arch/x86/util/dwarf-regs.o
  CC       /tmp/build/perf/arch/x86/util/intel-pt.o
arch/x86/util/dwarf-regs.c:122:5: error: no previous prototype for
âregs_query_register_offsetâ [-Werror=missing-prototypes]
 int regs_query_register_offset(const char *name)
     ^
cc1: all warnings being treated as errors
/home/git/linux/tools/build/Makefile.build:70: recipe for target
'/tmp/build/perf/arch/x86/util/dwarf-regs.o' failed
make[5]: *** [/tmp/build/perf/arch/x86/util/dwarf-regs.o] Error 1

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