include/asm/ftrace.lds.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef DIV_ROUND_UP
0003 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
0004 #endif
0005
0006 #define SIZEOF_MCOUNT_LOC_ENTRY 8
0007 #define SIZEOF_FTRACE_HOTPATCH_TRAMPOLINE 24
0008 #define FTRACE_HOTPATCH_TRAMPOLINES_SIZE(n)                    \
0009     DIV_ROUND_UP(SIZEOF_FTRACE_HOTPATCH_TRAMPOLINE * (n),              \
0010              SIZEOF_MCOUNT_LOC_ENTRY)
0011
0012 #ifdef CONFIG_FUNCTION_TRACER
0013 #define FTRACE_HOTPATCH_TRAMPOLINES_TEXT                       \
0014     . = ALIGN(8);                                  \
0015     __ftrace_hotpatch_trampolines_start = .;                   \
0016     . = . + FTRACE_HOTPATCH_TRAMPOLINES_SIZE(__stop_mcount_loc -           \
0017                          __start_mcount_loc);          \
0018     __ftrace_hotpatch_trampolines_end = .;
0019 #else
0020 #define FTRACE_HOTPATCH_TRAMPOLINES_TEXT
0021 #endif