From 7c0eda1a04340a1de09bdf6521853e3bc0637c3b Mon Sep 17 00:00:00 2001 From: Michal Suchanek Date: Fri, 20 Mar 2020 11:20:18 +0100 Subject: powerpc/perf: split callchain.c by bitness Building callchain.c with !COMPAT proved quite ugly with all the defines. Splitting out the 32bit and 64bit parts looks better. No code change intended. Signed-off-by: Michal Suchanek Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/a20027bf1074935a7934ee2a6757c99ea047e70d.1584699455.git.msuchanek@suse.de --- arch/powerpc/perf/callchain.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 arch/powerpc/perf/callchain.h (limited to 'arch/powerpc/perf/callchain.h') diff --git a/arch/powerpc/perf/callchain.h b/arch/powerpc/perf/callchain.h new file mode 100644 index 000000000000..7a2cb9e1181a --- /dev/null +++ b/arch/powerpc/perf/callchain.h @@ -0,0 +1,19 @@ +/* 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 */ -- cgit v1.2.3