diff options
Diffstat (limited to 'kernel/arch/s390/net/bpf_jit.h')
| -rw-r--r-- | kernel/arch/s390/net/bpf_jit.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/arch/s390/net/bpf_jit.h b/kernel/arch/s390/net/bpf_jit.h index de156ba3b..f010c93a8 100644 --- a/kernel/arch/s390/net/bpf_jit.h +++ b/kernel/arch/s390/net/bpf_jit.h @@ -28,11 +28,16 @@ extern u8 sk_load_word[], sk_load_half[], sk_load_byte[]; * | old backchain | | * +---------------+ | * | r15 - r6 | | + * +---------------+ | + * | 4 byte align | | + * | tail_call_cnt | | * BFP -> +===============+ | * | | | * | BPF stack | | * | | | * +---------------+ | + * | 8 byte skbp | | + * R15+170 -> +---------------+ | * | 8 byte hlen | | * R15+168 -> +---------------+ | * | 4 byte align | | @@ -46,13 +51,17 @@ extern u8 sk_load_word[], sk_load_half[], sk_load_byte[]; * R15 -> +---------------+ + low * * We get 160 bytes stack space from calling function, but only use - * 11 * 8 byte (old backchain + r15 - r6) for storing registers. + * 12 * 8 byte for old backchain, r15..r6, and tail_call_cnt. */ -#define STK_SPACE (MAX_BPF_STACK + 8 + 4 + 4 + 160) -#define STK_160_UNUSED (160 - 11 * 8) +#define STK_SPACE (MAX_BPF_STACK + 8 + 8 + 4 + 4 + 160) +#define STK_160_UNUSED (160 - 12 * 8) #define STK_OFF (STK_SPACE - STK_160_UNUSED) #define STK_OFF_TMP 160 /* Offset of tmp buffer on stack */ #define STK_OFF_HLEN 168 /* Offset of SKB header length on stack */ +#define STK_OFF_SKBP 170 /* Offset of SKB pointer on stack */ + +#define STK_OFF_R6 (160 - 11 * 8) /* Offset of r6 on stack */ +#define STK_OFF_TCCNT (160 - 12 * 8) /* Offset of tail_call_cnt on stack */ /* Offset to skip condition code check */ #define OFF_OK 4 |