1 #include <linux/errno.h>
2 #include <linux/kernel.h>
3 #include <linux/perf_event.h>
5 #include <asm/perf_regs.h>
6 #include <asm/ptrace.h>
8 u64 perf_reg_value(struct pt_regs *regs, int idx)
10 if (WARN_ON_ONCE((u32)idx >= PERF_REG_ARM64_MAX))
14 * Compat (i.e. 32 bit) mode:
15 * - PC has been set in the pt_regs struct in kernel_entry,
16 * - Handle SP and LR here.
18 if (compat_user_mode(regs)) {
19 if ((u32)idx == PERF_REG_ARM64_SP)
20 return regs->compat_sp;
21 if ((u32)idx == PERF_REG_ARM64_LR)
22 return regs->compat_lr;
25 return regs->regs[idx];
28 #define REG_RESERVED (~((1ULL << PERF_REG_ARM64_MAX) - 1))
30 int perf_reg_validate(u64 mask)
32 if (!mask || mask & REG_RESERVED)
38 u64 perf_reg_abi(struct task_struct *task)
40 if (is_compat_thread(task_thread_info(task)))
41 return PERF_SAMPLE_REGS_ABI_32;
43 return PERF_SAMPLE_REGS_ABI_64;