diff options
Diffstat (limited to 'arch/arm64/kernel/insn.c')
| -rw-r--r-- | arch/arm64/kernel/insn.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c index 94b62c1fa4df..3a63954a8b14 100644 --- a/arch/arm64/kernel/insn.c +++ b/arch/arm64/kernel/insn.c @@ -31,6 +31,7 @@ #include <asm/debug-monitors.h> #include <asm/fixmap.h> #include <asm/insn.h> +#include <asm/kprobes.h> #define AARCH64_INSN_SF_BIT BIT(31) #define AARCH64_INSN_N_BIT BIT(22) @@ -93,10 +94,10 @@ static void __kprobes *patch_map(void *addr, int fixmap) bool module = !core_kernel_text(uintaddr); struct page *page; - if (module && IS_ENABLED(CONFIG_DEBUG_SET_MODULE_RONX)) + if (module && IS_ENABLED(CONFIG_STRICT_MODULE_RWX)) page = vmalloc_to_page(addr); else if (!module) - page = pfn_to_page(PHYS_PFN(__pa(addr))); + page = phys_to_page(__pa_symbol(addr)); else return addr; @@ -417,6 +418,35 @@ u32 __kprobes aarch64_insn_encode_immediate(enum aarch64_insn_imm_type type, return insn; } +u32 aarch64_insn_decode_register(enum aarch64_insn_register_type type, + u32 insn) +{ + int shift; + + switch (type) { + case AARCH64_INSN_REGTYPE_RT: + case AARCH64_INSN_REGTYPE_RD: + shift = 0; + break; + case AARCH64_INSN_REGTYPE_RN: + shift = 5; + break; + case AARCH64_INSN_REGTYPE_RT2: + case AARCH64_INSN_REGTYPE_RA: + shift = 10; + break; + case AARCH64_INSN_REGTYPE_RM: + shift = 16; + break; + default: + pr_err("%s: unknown register type encoding %d\n", __func__, + type); + return 0; + } + + return (insn >> shift) & GENMASK(4, 0); +} + static u32 aarch64_insn_encode_register(enum aarch64_insn_register_type type, u32 insn, enum aarch64_insn_register reg) |