| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| #ifndef _POWERPC_PERF_CALLCHAIN_H |
| #define _POWERPC_PERF_CALLCHAIN_H |
| |
| int read_user_stack_slow(void __user *ptr, void *buf, int nb); |
| void perf_callchain_user_64(struct perf_callchain_entry_ctx *entry, |
| struct pt_regs *regs); |
| void perf_callchain_user_32(struct perf_callchain_entry_ctx *entry, |
| struct pt_regs *regs); |
| |
| static inline bool invalid_user_sp(unsigned long sp) |
| { |
| unsigned long mask = is_32bit_task() ? 3 : 7; |
| unsigned long top = STACK_TOP - (is_32bit_task() ? 16 : 32); |
| |
| return (!sp || (sp & mask) || (sp > top)); |
| } |
| |
| #endif /* _POWERPC_PERF_CALLCHAIN_H */ |
