perf riscv: fix register name strings

On risc-v, pref probe generates an invalid syntax for a named register in
a kprobe.

$ perf probe --debug verbose --add "n_tty_write tty"
...
Writing event: p:probe/n_tty_write _text+8922528 tty=%"%a0":x64
Failed to write event: Invalid argument

The problem is the combination of

   #define REG_DWARFNUM_NAME(reg, idx) [idx] = "%" #reg

and entries such as

   REG_DWARFNUM_NAME("%a0", 10)

where #reg will escape the quotes of the first macro parameter.

Update the macro definition to produce the correct syntax for a named
register in a kprobe, i.e. the unquoted register name with only one
leading %.

Fixes: a90c4519186dfc08 ("perf riscv: Remove dwarf-regs.c and add dwarf-regs-table.h")
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Cc: Ian Rogers <irogers@google.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

0 files changed, 0 insertions, 0 deletions