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lkdtm: Force do_nothing() out of line
LKDTM tests display that the run do_nothing() at a given address, but in reality do_nothing() is inlined into the caller. Force it out of line so that it really runs text at the displayed address. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/a5dcf4d2088e6aca47ab3b4c6d5c0f7fa064e25a.1644928018.git.christophe.leroy@csgroup.eu
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1 changed files with 2 additions and 2 deletions
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@ -21,7 +21,7 @@
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/* This is non-const, so it will end up in the .data section. */
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static u8 data_area[EXEC_SIZE];
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/* This is cost, so it will end up in the .rodata section. */
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/* This is const, so it will end up in the .rodata section. */
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static const unsigned long rodata = 0xAA55AA55;
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/* This is marked __ro_after_init, so it should ultimately be .rodata. */
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@ -31,7 +31,7 @@ static unsigned long ro_after_init __ro_after_init = 0x55AA5500;
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* This just returns to the caller. It is designed to be copied into
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* non-executable memory regions.
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*/
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static void do_nothing(void)
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static noinline void do_nothing(void)
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{
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return;
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}
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