projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ee0d7fd JP |
1 | #include <linux/errno.h> |
| 2 | #include <linux/kernel.h> | |
| 3 | #include <linux/perf_event.h> | |
| 4 | #include <linux/bug.h> | |
| ff268ff7 MS |
5 | |
| 6 | #include <asm/compat.h> | |
| 2ee0d7fd JP |
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_ARM64_MAX)) | |
| 13 | return 0; | |
| 14 | ||
| 15 | /* | |
| 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. | |
| 19 | */ | |
| 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; | |
| 25 | } | |
| 26 | ||
| 5b75a6af WD |
27 | if ((u32)idx == PERF_REG_ARM64_SP) |
| 28 | return regs->sp; | |
| 29 | ||
| 30 | if ((u32)idx == PERF_REG_ARM64_PC) | |
| 31 | return regs->pc; | |
| 32 | ||
| 2ee0d7fd JP |
33 | return regs->regs[idx]; |
| 34 | } | |
| 35 | ||
| 36 | #define REG_RESERVED (~((1ULL << PERF_REG_ARM64_MAX) - 1)) | |
| 37 | ||
| 38 | int perf_reg_validate(u64 mask) | |
| 39 | { | |
| 40 | if (!mask || mask & REG_RESERVED) | |
| 41 | return -EINVAL; | |
| 42 | ||
| 43 | return 0; | |
| 44 | } | |
| 45 | ||
| 46 | u64 perf_reg_abi(struct task_struct *task) | |
| 47 | { | |
| 48 | if (is_compat_thread(task_thread_info(task))) | |
| 49 | return PERF_SAMPLE_REGS_ABI_32; | |
| 50 | else | |
| 51 | return PERF_SAMPLE_REGS_ABI_64; | |
| 52 | } | |
| 88a7c26a AL |
53 | |
| 54 | void perf_get_regs_user(struct perf_regs *regs_user, | |
| 55 | struct pt_regs *regs, | |
| 56 | struct pt_regs *regs_user_copy) | |
| 57 | { | |
| 58 | regs_user->regs = task_pt_regs(current); | |
| 59 | regs_user->abi = perf_reg_abi(current); | |
| 60 | } |