1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef _POWERPC_PERF_CALLCHAIN_H 3 #define _POWERPC_PERF_CALLCHAIN_H 4 5 int read_user_stack_slow(void __user *ptr, void *buf, int nb); 6 void perf_callchain_user_64(struct perf_callchain_entry_ctx *entry, 7 struct pt_regs *regs); 8 void perf_callchain_user_32(struct perf_callchain_entry_ctx *entry, 9 struct pt_regs *regs); 10 11 static inline bool invalid_user_sp(unsigned long sp) 12 { 13 unsigned long mask = is_32bit_task() ? 3 : 7; 14 unsigned long top = STACK_TOP - (is_32bit_task() ? 16 : 32); 15 16 return (!sp || (sp & mask) || (sp > top)); 17 } 18 19 #endif /* _POWERPC_PERF_CALLCHAIN_H */ 20