diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c index e6aeaec46969..9f6e93343b6e 100644 --- a/arch/loongarch/net/bpf_jit.c +++ b/arch/loongarch/net/bpf_jit.c @@ -1284,7 +1284,7 @@ static int emit_jump_or_nops(void *target, void *ip, u32 *insns, bool is_call) return 0; } - return emit_jump_and_link(&ctx, is_call ? LOONGARCH_GPR_T0 : LOONGARCH_GPR_ZERO, (u64)target); + return emit_jump_and_link(&ctx, is_call ? LOONGARCH_GPR_RA : LOONGARCH_GPR_ZERO, (u64)target); } static int emit_call(struct jit_ctx *ctx, u64 addr) @@ -1641,14 +1641,12 @@ static int __arch_prepare_bpf_trampoline(struct jit_ctx *ctx, struct bpf_tramp_i /* To traced function */ /* Ftrace jump skips 2 NOP instructions */ - if (is_kernel_text((unsigned long)orig_call)) + if (is_kernel_text((unsigned long)orig_call) || + is_module_text_address((unsigned long)orig_call)) orig_call += LOONGARCH_FENTRY_NBYTES; /* Direct jump skips 5 NOP instructions */ else if (is_bpf_text_address((unsigned long)orig_call)) orig_call += LOONGARCH_BPF_FENTRY_NBYTES; - /* Module tracing not supported - cause kernel lockups */ - else if (is_module_text_address((unsigned long)orig_call)) - return -ENOTSUPP; if (flags & BPF_TRAMP_F_CALL_ORIG) { move_addr(ctx, LOONGARCH_GPR_A0, (const u64)im); @@ -1741,12 +1739,16 @@ static int __arch_prepare_bpf_trampoline(struct jit_ctx *ctx, struct bpf_tramp_i emit_insn(ctx, ldd, LOONGARCH_GPR_FP, LOONGARCH_GPR_SP, 0); emit_insn(ctx, addid, LOONGARCH_GPR_SP, LOONGARCH_GPR_SP, 16); - if (flags & BPF_TRAMP_F_SKIP_FRAME) + if (flags & BPF_TRAMP_F_SKIP_FRAME) { /* return to parent function */ - emit_insn(ctx, jirl, LOONGARCH_GPR_ZERO, LOONGARCH_GPR_RA, 0); - else - /* return to traced function */ + move_reg(ctx, LOONGARCH_GPR_RA, LOONGARCH_GPR_T0); emit_insn(ctx, jirl, LOONGARCH_GPR_ZERO, LOONGARCH_GPR_T0, 0); + } else { + /* return to traced function */ + move_reg(ctx, LOONGARCH_GPR_T1, LOONGARCH_GPR_RA); + move_reg(ctx, LOONGARCH_GPR_RA, LOONGARCH_GPR_T0); + emit_insn(ctx, jirl, LOONGARCH_GPR_ZERO, LOONGARCH_GPR_T1, 0); + } } ret = ctx->idx;