ftrace.lds.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef DIV_ROUND_UP
 3#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
 4#endif
 5
 6#define SIZEOF_MCOUNT_LOC_ENTRY 8
 7#define SIZEOF_FTRACE_HOTPATCH_TRAMPOLINE 24
 8#define FTRACE_HOTPATCH_TRAMPOLINES_SIZE(n)				       \
 9	DIV_ROUND_UP(SIZEOF_FTRACE_HOTPATCH_TRAMPOLINE * (n),		       \
10		     SIZEOF_MCOUNT_LOC_ENTRY)
11
12#ifdef CONFIG_FUNCTION_TRACER
13#define FTRACE_HOTPATCH_TRAMPOLINES_TEXT				       \
14	. = ALIGN(8);							       \
15	__ftrace_hotpatch_trampolines_start = .;			       \
16	. = . + FTRACE_HOTPATCH_TRAMPOLINES_SIZE(__stop_mcount_loc -	       \
17						 __start_mcount_loc);	       \
18	__ftrace_hotpatch_trampolines_end = .;
19#else
20#define FTRACE_HOTPATCH_TRAMPOLINES_TEXT
21#endif