Loading arch/arm/kernel/fiq.c +2 −1 Original line number Original line Diff line number Diff line Loading @@ -89,7 +89,8 @@ void set_fiq_handler(void *start, unsigned int length) memcpy(base + offset, start, length); memcpy(base + offset, start, length); if (!cache_is_vipt_nonaliasing()) if (!cache_is_vipt_nonaliasing()) flush_icache_range(base + offset, offset + length); flush_icache_range((unsigned long)base + offset, offset + length); flush_icache_range(0xffff0000 + offset, 0xffff0000 + offset + length); flush_icache_range(0xffff0000 + offset, 0xffff0000 + offset + length); } } Loading arch/arm/mm/Kconfig +6 −3 Original line number Original line Diff line number Diff line Loading @@ -809,15 +809,18 @@ config KUSER_HELPERS the CPU type fitted to the system. This permits binaries to be the CPU type fitted to the system. This permits binaries to be run on ARMv4 through to ARMv7 without modification. run on ARMv4 through to ARMv7 without modification. See Documentation/arm/kernel_user_helpers.txt for details. However, the fixed address nature of these helpers can be used However, the fixed address nature of these helpers can be used by ROP (return orientated programming) authors when creating by ROP (return orientated programming) authors when creating exploits. exploits. If all of the binaries and libraries which run on your platform If all of the binaries and libraries which run on your platform are built specifically for your platform, and make no use of are built specifically for your platform, and make no use of these helpers, then you can turn this option off. However, these helpers, then you can turn this option off to hinder when such an binary or library is run, it will receive a SIGILL such exploits. However, in that case, if a binary or library signal, which will terminate the program. relying on those helpers is run, it will receive a SIGILL signal, which will terminate the program. Say N here only if you are absolutely certain that you do not Say N here only if you are absolutely certain that you do not need these helpers; otherwise, the safe option is to say Y. need these helpers; otherwise, the safe option is to say Y. Loading Loading
arch/arm/kernel/fiq.c +2 −1 Original line number Original line Diff line number Diff line Loading @@ -89,7 +89,8 @@ void set_fiq_handler(void *start, unsigned int length) memcpy(base + offset, start, length); memcpy(base + offset, start, length); if (!cache_is_vipt_nonaliasing()) if (!cache_is_vipt_nonaliasing()) flush_icache_range(base + offset, offset + length); flush_icache_range((unsigned long)base + offset, offset + length); flush_icache_range(0xffff0000 + offset, 0xffff0000 + offset + length); flush_icache_range(0xffff0000 + offset, 0xffff0000 + offset + length); } } Loading
arch/arm/mm/Kconfig +6 −3 Original line number Original line Diff line number Diff line Loading @@ -809,15 +809,18 @@ config KUSER_HELPERS the CPU type fitted to the system. This permits binaries to be the CPU type fitted to the system. This permits binaries to be run on ARMv4 through to ARMv7 without modification. run on ARMv4 through to ARMv7 without modification. See Documentation/arm/kernel_user_helpers.txt for details. However, the fixed address nature of these helpers can be used However, the fixed address nature of these helpers can be used by ROP (return orientated programming) authors when creating by ROP (return orientated programming) authors when creating exploits. exploits. If all of the binaries and libraries which run on your platform If all of the binaries and libraries which run on your platform are built specifically for your platform, and make no use of are built specifically for your platform, and make no use of these helpers, then you can turn this option off. However, these helpers, then you can turn this option off to hinder when such an binary or library is run, it will receive a SIGILL such exploits. However, in that case, if a binary or library signal, which will terminate the program. relying on those helpers is run, it will receive a SIGILL signal, which will terminate the program. Say N here only if you are absolutely certain that you do not Say N here only if you are absolutely certain that you do not need these helpers; otherwise, the safe option is to say Y. need these helpers; otherwise, the safe option is to say Y. Loading
