arch/sparc/net/bpf_jit_32.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BPF_JIT_H
   3 #define _BPF_JIT_H
   4
   5 /* Conventions:
   6  *  %g1 : temporary
   7  *  %g2 : Secondary temporary used by SKB data helper stubs.
   8  *  %g3 : packet offset passed into SKB data helper stubs.
   9  *  %o0 : pointer to skb (first argument given to JIT function)
  10  *  %o1 : BPF A accumulator
  11  *  %o2 : BPF X accumulator
  12  *  %o3 : Holds saved %o7 so we can call helper functions without needing
  13  *        to allocate a register window.
  14  *  %o4 : skb->len - skb->data_len
  15  *  %o5 : skb->data
  16  */
  17
  18 #ifndef __ASSEMBLER__
  19 #define G0              0x00
  20 #define G1              0x01
  21 #define G3              0x03
  22 #define G6              0x06
  23 #define O0              0x08
  24 #define O1              0x09
  25 #define O2              0x0a
  26 #define O3              0x0b
  27 #define O4              0x0c
  28 #define O5              0x0d
  29 #define SP              0x0e
  30 #define O7              0x0f
  31 #define FP              0x1e
  32
  33 #define r_SKB           O0
  34 #define r_A             O1
  35 #define r_X             O2
  36 #define r_saved_O7      O3
  37 #define r_HEADLEN       O4
  38 #define r_SKB_DATA      O5
  39 #define r_TMP           G1
  40 #define r_TMP2          G2
  41 #define r_OFF           G3
  42
  43 /* assembly code in arch/sparc/net/bpf_jit_asm_32.S */
  44 extern u32 bpf_jit_load_word[];
  45 extern u32 bpf_jit_load_half[];
  46 extern u32 bpf_jit_load_byte[];
  47 extern u32 bpf_jit_load_byte_msh[];
  48 extern u32 bpf_jit_load_word_positive_offset[];
  49 extern u32 bpf_jit_load_half_positive_offset[];
  50 extern u32 bpf_jit_load_byte_positive_offset[];
  51 extern u32 bpf_jit_load_byte_msh_positive_offset[];
  52 extern u32 bpf_jit_load_word_negative_offset[];
  53 extern u32 bpf_jit_load_half_negative_offset[];
  54 extern u32 bpf_jit_load_byte_negative_offset[];
  55 extern u32 bpf_jit_load_byte_msh_negative_offset[];
  56
  57 #else
  58 #define r_SKB           %o0
  59 #define r_A             %o1
  60 #define r_X             %o2
  61 #define r_saved_O7      %o3
  62 #define r_HEADLEN       %o4
  63 #define r_SKB_DATA      %o5
  64 #define r_TMP           %g1
  65 #define r_TMP2          %g2
  66 #define r_OFF           %g3
  67 #endif
  68
  69 #endif /* _BPF_JIT_H */