[PATCH] arm64: fix endianness annotation for 'struct jit_ctx' and friends
Luc Van Oostenryck
luc.vanoostenryck at gmail.com
Wed Jun 28 07:58:03 PDT 2017
struct jit_ctx::image is used the store a pointer to the jitted
intructions, which are always little-endian. These instructions
are thus correctly converted from native order to little-endian
before being stored but the pointer 'image' is declared as for
native order values.
Fix this by declaring the field as __le32* instead of u32*.
Same for the pointer used in jit_fill_hole() to initialize
the image.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck at gmail.com>
---
arch/arm64/net/bpf_jit_comp.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index c870d6f01..8860bb9c3 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -70,7 +70,7 @@ struct jit_ctx {
int idx;
int epilogue_offset;
int *offset;
- u32 *image;
+ __le32 *image;
};
static inline void emit(const u32 insn, struct jit_ctx *ctx)
@@ -130,7 +130,7 @@ static inline int bpf2a64_offset(int bpf_to, int bpf_from,
static void jit_fill_hole(void *area, unsigned int size)
{
- u32 *ptr;
+ __le32 *ptr;
/* We are guaranteed to have aligned memory. */
for (ptr = area; size >= sizeof(u32); size -= sizeof(u32))
*ptr++ = cpu_to_le32(AARCH64_BREAK_FAULT);
@@ -874,7 +874,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
/* 2. Now, the actual pass. */
- ctx.image = (u32 *)image_ptr;
+ ctx.image = (__le32 *)image_ptr;
ctx.idx = 0;
build_prologue(&ctx);
--
2.13.0
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