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| author | Qing Zhang <zhangqing@loongson.cn> | 2022-12-10 17:40:21 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-12-14 03:41:54 +0300 |
| commit | 28ac0a9e04d7dfb42220dc9d221164d93f20fb3a (patch) | |
| tree | 520a7c5f68595d38a141a7866846f4cf40f19c1e /arch/loongarch/include/asm/module.lds.h | |
| parent | a51ac5246d2505b58229242959d2bc73d113ca50 (diff) | |
| download | linux-28ac0a9e04d7dfb42220dc9d221164d93f20fb3a.tar.xz | |
LoongArch: modules/ftrace: Initialize PLT at load time
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>
Diffstat (limited to 'arch/loongarch/include/asm/module.lds.h')
| -rw-r--r-- | arch/loongarch/include/asm/module.lds.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/module.lds.h b/arch/loongarch/include/asm/module.lds.h index a3d1bc0fcc72..438f09d4ccf4 100644 --- a/arch/loongarch/include/asm/module.lds.h +++ b/arch/loongarch/include/asm/module.lds.h @@ -5,4 +5,5 @@ SECTIONS { .got : { BYTE(0) } .plt : { BYTE(0) } .plt.idx : { BYTE(0) } + .ftrace_trampoline : { BYTE(0) } } |