1 2 #include <linux/errno.h> 3 #include <linux/kernel.h> 4 #include <linux/perf_event.h> 5 #include <linux/bug.h> 6 #include <linux/sched/task_stack.h> 7 #include <asm/perf_regs.h> 8 #include <asm/ptrace.h> 9 10 u64 perf_reg_value(struct pt_regs *regs, int idx) 11 { 12 if (WARN_ON_ONCE((u32)idx >= PERF_REG_ARM_MAX)) 13 return 0; 14 15 return regs->uregs[idx]; 16 } 17 18 #define REG_RESERVED (~((1ULL << PERF_REG_ARM_MAX) - 1)) 19 20 int perf_reg_validate(u64 mask) 21 { 22 if (!mask || mask & REG_RESERVED) 23 return -EINVAL; 24 25 return 0; 26 } 27 28 u64 perf_reg_abi(struct task_struct *task) 29 { 30 return PERF_SAMPLE_REGS_ABI_32; 31 } 32 33 void perf_get_regs_user(struct perf_regs *regs_user, 34 struct pt_regs *regs, 35 struct pt_regs *regs_user_copy) 36 { 37 regs_user->regs = task_pt_regs(current); 38 regs_user->abi = perf_reg_abi(current); 39 } 40