pt_regs32
#define GP_REGS_SIZE min(sizeof(elf_gregset_t32), sizeof(struct pt_regs32))
#define TRACEREG32_SZ sizeof(struct pt_regs32)
struct pt_regs32 __user *pregs;
pregs = (struct pt_regs32 __user *) addr;
struct pt_regs32 regs;