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