diff options
Diffstat (limited to 'arch/arm/kernel/ftrace.c')
| -rw-r--r-- | arch/arm/kernel/ftrace.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c index 6fd7c4a1e532..5c9cecfaeb21 100644 --- a/arch/arm/kernel/ftrace.c +++ b/arch/arm/kernel/ftrace.c @@ -16,10 +16,11 @@ #include <linux/uaccess.h> #include <asm/cacheflush.h> +#include <asm/opcodes.h> #include <asm/ftrace.h> #ifdef CONFIG_THUMB2_KERNEL -#define NOP 0xeb04f85d /* pop.w {lr} */ +#define NOP 0xf85deb04 /* pop.w {lr} */ #else #define NOP 0xe8bd4000 /* pop {lr} */ #endif @@ -88,7 +89,7 @@ static unsigned long ftrace_gen_branch(unsigned long pc, unsigned long addr, if (link) second |= 1 << 14; - return (second << 16) | first; + return __opcode_thumb32_compose(first, second); } #else static unsigned long ftrace_gen_branch(unsigned long pc, unsigned long addr, @@ -125,6 +126,14 @@ static int ftrace_modify_code(unsigned long pc, unsigned long old, { unsigned long replaced; + if (IS_ENABLED(CONFIG_THUMB2_KERNEL)) { + old = __opcode_to_mem_thumb32(old); + new = __opcode_to_mem_thumb32(new); + } else { + old = __opcode_to_mem_arm(old); + new = __opcode_to_mem_arm(new); + } + if (validate) { if (probe_kernel_read(&replaced, (void *)pc, MCOUNT_INSN_SIZE)) return -EFAULT; |