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28ac0a9e04
This patch implements ftrace trampolines through plt entry. Tested by forcing ftrace_make_call() to use the module PLT, and then loading up a module after setting up ftrace with: | echo ":mod:<module-name>" > set_ftrace_filter; | echo function > current_tracer; | modprobe <module-name> Since FTRACE_ADDR/FTRACE_REGS_ADDR is only defined when CONFIG_DYNAMIC_ FTRACE is selected, we wrap their usage in module_init_ftrace_plt() with ifdeffery rather than using IS_ENABLED(). Signed-off-by: Qing Zhang <zhangqing@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
10 lines
235 B
C
10 lines
235 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2020-2022 Loongson Technology Corporation Limited */
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SECTIONS {
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. = ALIGN(4);
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.got : { BYTE(0) }
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.plt : { BYTE(0) }
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.plt.idx : { BYTE(0) }
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.ftrace_trampoline : { BYTE(0) }
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}
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