tools/perf/arch/mips/util/unwind-libunwind.c

#include <errno.h>
#include <libunwind.h>
#include "perf_regs.h"
#include "../../util/unwind.h"
#include "../../util/debug.h"

int libunwind__arch_reg_id(int regnum)
{
       switch (regnum) {
       case UNW_MIPS_R1 ... UNW_MIPS_R25:
               return regnum - UNW_MIPS_R1 + PERF_REG_MIPS_R1;
       case UNW_MIPS_R28 ... UNW_MIPS_R31:
               return regnum - UNW_MIPS_R28 + PERF_REG_MIPS_R28;
       case UNW_MIPS_PC:
               return PERF_REG_MIPS_PC;
       default:
               pr_err("unwind: invalid reg id %d\n", regnum);
               return -EINVAL;
       }
}