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-rw-r--r--arch/x86/net/bpf_jit.S154
1 files changed, 0 insertions, 154 deletions
diff --git a/arch/x86/net/bpf_jit.S b/arch/x86/net/bpf_jit.S
deleted file mode 100644
index b33093f84528..000000000000
--- a/arch/x86/net/bpf_jit.S
+++ /dev/null
@@ -1,154 +0,0 @@
-/* bpf_jit.S : BPF JIT helper functions
- *
- * Copyright (C) 2011 Eric Dumazet (eric.dumazet@gmail.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; version 2
- * of the License.
- */
-#include <linux/linkage.h>
-#include <asm/frame.h>
-
-/*
- * Calling convention :
- * rbx : skb pointer (callee saved)
- * esi : offset of byte(s) to fetch in skb (can be scratched)
- * r10 : copy of skb->data
- * r9d : hlen = skb->len - skb->data_len
- */
-#define SKBDATA %r10
-#define SKF_MAX_NEG_OFF $(-0x200000) /* SKF_LL_OFF from filter.h */
-
-#define FUNC(name) \
- .globl name; \
- .type name, @function; \
- name:
-
-FUNC(sk_load_word)
- test %esi,%esi
- js bpf_slow_path_word_neg
-
-FUNC(sk_load_word_positive_offset)
- mov %r9d,%eax # hlen
- sub %esi,%eax # hlen - offset
- cmp $3,%eax
- jle bpf_slow_path_word
- mov (SKBDATA,%rsi),%eax
- bswap %eax /* ntohl() */
- ret
-
-FUNC(sk_load_half)
- test %esi,%esi
- js bpf_slow_path_half_neg
-
-FUNC(sk_load_half_positive_offset)
- mov %r9d,%eax
- sub %esi,%eax # hlen - offset
- cmp $1,%eax
- jle bpf_slow_path_half
- movzwl (SKBDATA,%rsi),%eax
- rol $8,%ax # ntohs()
- ret
-
-FUNC(sk_load_byte)
- test %esi,%esi
- js bpf_slow_path_byte_neg
-
-FUNC(sk_load_byte_positive_offset)
- cmp %esi,%r9d /* if (offset >= hlen) goto bpf_slow_path_byte */
- jle bpf_slow_path_byte
- movzbl (SKBDATA,%rsi),%eax
- ret
-
-/* rsi contains offset and can be scratched */
-#define bpf_slow_path_common(LEN) \
- lea 32(%rbp), %rdx;\
- FRAME_BEGIN; \
- mov %rbx, %rdi; /* arg1 == skb */ \
- push %r9; \
- push SKBDATA; \
-/* rsi already has offset */ \
- mov $LEN,%ecx; /* len */ \
- call skb_copy_bits; \
- test %eax,%eax; \
- pop SKBDATA; \
- pop %r9; \
- FRAME_END
-
-
-bpf_slow_path_word:
- bpf_slow_path_common(4)
- js bpf_error
- mov 32(%rbp),%eax
- bswap %eax
- ret
-
-bpf_slow_path_half:
- bpf_slow_path_common(2)
- js bpf_error
- mov 32(%rbp),%ax
- rol $8,%ax
- movzwl %ax,%eax
- ret
-
-bpf_slow_path_byte:
- bpf_slow_path_common(1)
- js bpf_error
- movzbl 32(%rbp),%eax
- ret
-
-#define sk_negative_common(SIZE) \
- FRAME_BEGIN; \
- mov %rbx, %rdi; /* arg1 == skb */ \
- push %r9; \
- push SKBDATA; \
-/* rsi already has offset */ \
- mov $SIZE,%edx; /* size */ \
- call bpf_internal_load_pointer_neg_helper; \
- test %rax,%rax; \
- pop SKBDATA; \
- pop %r9; \
- FRAME_END; \
- jz bpf_error
-
-bpf_slow_path_word_neg:
- cmp SKF_MAX_NEG_OFF, %esi /* test range */
- jl bpf_error /* offset lower -> error */
-
-FUNC(sk_load_word_negative_offset)
- sk_negative_common(4)
- mov (%rax), %eax
- bswap %eax
- ret
-
-bpf_slow_path_half_neg:
- cmp SKF_MAX_NEG_OFF, %esi
- jl bpf_error
-
-FUNC(sk_load_half_negative_offset)
- sk_negative_common(2)
- mov (%rax),%ax
- rol $8,%ax
- movzwl %ax,%eax
- ret
-
-bpf_slow_path_byte_neg:
- cmp SKF_MAX_NEG_OFF, %esi
- jl bpf_error
-
-FUNC(sk_load_byte_negative_offset)
- sk_negative_common(1)
- movzbl (%rax), %eax
- ret
-
-bpf_error:
-# force a return 0 from jit handler
- xor %eax,%eax
- mov (%rbp),%rbx
- mov 8(%rbp),%r13
- mov 16(%rbp),%r14
- mov 24(%rbp),%r15
- add $40, %rbp
- leaveq
- ret