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