diff options
| -rw-r--r-- | arch/arm64/net/bpf_jit.h | 3 | ||||
| -rw-r--r-- | arch/arm64/net/bpf_jit_comp.c | 12 |
2 files changed, 13 insertions, 2 deletions
diff --git a/arch/arm64/net/bpf_jit.h b/arch/arm64/net/bpf_jit.h index 3920213244f0..194c95ccc1cf 100644 --- a/arch/arm64/net/bpf_jit.h +++ b/arch/arm64/net/bpf_jit.h @@ -263,6 +263,9 @@ /* HINTs */ #define A64_HINT(x) aarch64_insn_gen_hint(x) +#define A64_PACIASP A64_HINT(AARCH64_INSN_HINT_PACIASP) +#define A64_AUTIASP A64_HINT(AARCH64_INSN_HINT_AUTIASP) + /* BTI */ #define A64_BTI_C A64_HINT(AARCH64_INSN_HINT_BTIC) #define A64_BTI_J A64_HINT(AARCH64_INSN_HINT_BTIJ) diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index 093fa9ea1083..8ab4035dea27 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c @@ -236,7 +236,8 @@ static bool is_lsi_offset(int offset, int scale) } /* Tail call offset to jump into */ -#if IS_ENABLED(CONFIG_ARM64_BTI_KERNEL) +#if IS_ENABLED(CONFIG_ARM64_BTI_KERNEL) || \ + IS_ENABLED(CONFIG_ARM64_PTR_AUTH_KERNEL) #define PROLOGUE_OFFSET 9 #else #define PROLOGUE_OFFSET 8 @@ -278,8 +279,11 @@ static int build_prologue(struct jit_ctx *ctx, bool ebpf_from_cbpf) * */ + /* Sign lr */ + if (IS_ENABLED(CONFIG_ARM64_PTR_AUTH_KERNEL)) + emit(A64_PACIASP, ctx); /* BTI landing pad */ - if (IS_ENABLED(CONFIG_ARM64_BTI_KERNEL)) + else if (IS_ENABLED(CONFIG_ARM64_BTI_KERNEL)) emit(A64_BTI_C, ctx); /* Save FP and LR registers to stay align with ARM64 AAPCS */ @@ -580,6 +584,10 @@ static void build_epilogue(struct jit_ctx *ctx) /* Set return value */ emit(A64_MOV(1, A64_R(0), r0), ctx); + /* Authenticate lr */ + if (IS_ENABLED(CONFIG_ARM64_PTR_AUTH_KERNEL)) + emit(A64_AUTIASP, ctx); + emit(A64_RET(A64_LR), ctx); } |