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| author | Zong Li <zong.li@sifive.com> | 2020-06-03 16:03:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-03 20:09:50 -0700 |
| commit | b422d28b21773bbfc9e84dbb5579a8ce355279ca (patch) | |
| tree | 1dbe652d8d959d8d53d0772f85edb772994d75c5 /arch/riscv | |
| parent | 375d315cbfdb50e1eda099d4d004f7f401285111 (diff) | |
| download | linux-b422d28b21773bbfc9e84dbb5579a8ce355279ca.tar.bz2 | |
riscv: support DEBUG_WX
Support DEBUG_WX to check whether there are mapping with write and execute
permission at the same time.
[akpm@linux-foundation.org: replace macros with C]
Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Link: http://lkml.kernel.org/r/282e266311bced080bc6f7c255b92f87c1eb65d6.1587455584.git.zong.li@sifive.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/Kconfig | 1 | ||||
| -rw-r--r-- | arch/riscv/include/asm/ptdump.h | 11 | ||||
| -rw-r--r-- | arch/riscv/mm/init.c | 3 |
3 files changed, 15 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 5c07ca4d5cd6..68418201734a 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -16,6 +16,7 @@ config RISCV select OF_EARLY_FLATTREE select OF_IRQ select ARCH_HAS_BINFMT_FLAT + select ARCH_HAS_DEBUG_WX select ARCH_WANT_FRAME_POINTERS select CLONE_BACKWARDS select COMMON_CLK diff --git a/arch/riscv/include/asm/ptdump.h b/arch/riscv/include/asm/ptdump.h index e29af7191909..3c9ea6dd5af7 100644 --- a/arch/riscv/include/asm/ptdump.h +++ b/arch/riscv/include/asm/ptdump.h @@ -8,4 +8,15 @@ void ptdump_check_wx(void); +#ifdef CONFIG_DEBUG_WX +static inline void debug_checkwx(void) +{ + ptdump_check_wx(); +} +#else +static inline void debug_checkwx(void) +{ +} +#endif + #endif /* _ASM_RISCV_PTDUMP_H */ diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 6168b1985b77..939159b13a13 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -19,6 +19,7 @@ #include <asm/sections.h> #include <asm/pgtable.h> #include <asm/io.h> +#include <asm/ptdump.h> #include "../kernel/head.h" @@ -514,6 +515,8 @@ void mark_rodata_ro(void) set_memory_ro(rodata_start, (data_start - rodata_start) >> PAGE_SHIFT); set_memory_nx(rodata_start, (data_start - rodata_start) >> PAGE_SHIFT); set_memory_nx(data_start, (max_low - data_start) >> PAGE_SHIFT); + + debug_checkwx(); } #endif |