| /* | |
| * BPF Jit compiler defines | |
| * | |
| * Copyright IBM Corp. 2012,2015 | |
| * | |
| * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| * Michael Holzheu <holzheu@linux.vnet.ibm.com> | |
| */ | |
| #ifndef __ARCH_S390_NET_BPF_JIT_H | |
| #define __ARCH_S390_NET_BPF_JIT_H | |
| #ifndef __ASSEMBLY__ | |
| #include <linux/filter.h> | |
| #include <linux/types.h> | |
| extern u8 sk_load_word_pos[], sk_load_half_pos[], sk_load_byte_pos[]; | |
| extern u8 sk_load_word[], sk_load_half[], sk_load_byte[]; | |
| #endif /* __ASSEMBLY__ */ | |
| /* | |
| * Stackframe layout (packed stack): | |
| * | |
| * ^ high | |
| * +---------------+ | | |
| * | old backchain | | | |
| * +---------------+ | | |
| * | r15 - r6 | | | |
| * +---------------+ | | |
| * | 4 byte align | | | |
| * | tail_call_cnt | | | |
| * BFP -> +===============+ | | |
| * | | | | |
| * | BPF stack | | | |
| * | | | | |
| * +---------------+ | | |
| * | 8 byte skbp | | | |
| * R15+176 -> +---------------+ | | |
| * | 8 byte hlen | | | |
| * R15+168 -> +---------------+ | | |
| * | 4 byte align | | | |
| * +---------------+ | | |
| * | 4 byte temp | | | |
| * | for bpf_jit.S | | | |
| * R15+160 -> +---------------+ | | |
| * | new backchain | | | |
| * R15+152 -> +---------------+ | | |
| * | + 152 byte SA | | | |
| * R15 -> +---------------+ + low | |
| * | |
| * We get 160 bytes stack space from calling function, but only use | |
| * 12 * 8 byte for old backchain, r15..r6, and tail_call_cnt. | |
| */ | |
| #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 176 /* 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 | |
| #endif /* __ARCH_S390_NET_BPF_JIT_H */ |