/src/capstonenext/arch/BPF/BPFInstPrinter.c

Source (jump to first uncovered line)
/* Capstone Disassembly Engine */
/* BPF Backend by david942j <david942j@gmail.com>, 2019 */
/* SPDX-FileCopyrightText: 2024 Roee Toledano <roeetoledano10@gmail.com> */
/* SPDX-License-Identifier: BSD-3 */

#include <capstone/platform.h>

#include "BPFConstants.h"
#include "BPFInstPrinter.h"
#include "BPFMapping.h"
#include "../../Mapping.h"

static cs_bpf_op *expand_bpf_operands(cs_bpf *bpf)
{
  assert(bpf->op_count < 3);
  return &bpf->operands[bpf->op_count++];
}

static void push_op_reg(cs_bpf *bpf, bpf_op_type val, uint8_t ac_mode)
{
  cs_bpf_op *op = expand_bpf_operands(bpf);

  op->type = BPF_OP_REG;
  op->reg = val;
  op->access = ac_mode;
}

static void push_op_imm(cs_bpf *bpf, uint64_t val, const bool is_signed)
{
  cs_bpf_op *op = expand_bpf_operands(bpf);

  op->type = BPF_OP_IMM;
  op->imm = val;
  op->is_signed = is_signed;
}

static void push_op_off(cs_bpf *bpf, uint32_t val, const bool is_signed)
{
  cs_bpf_op *op = expand_bpf_operands(bpf);

  op->type = BPF_OP_OFF;
  op->off = val;
  op->is_signed = is_signed;
}

static void push_op_mem(cs_bpf *bpf, bpf_reg reg, uint32_t val,
      const bool is_signed, const bool is_pkt)
{
  cs_bpf_op *op = expand_bpf_operands(bpf);

  op->type = BPF_OP_MEM;
  op->mem.base = reg;
  op->mem.disp = val;
  op->is_signed = is_signed;
  op->is_pkt = is_pkt;
}

static void push_op_mmem(cs_bpf *bpf, uint32_t val)
{
  cs_bpf_op *op = expand_bpf_operands(bpf);

  op->type = BPF_OP_MMEM;
  op->mmem = val;
}

static void push_op_msh(cs_bpf *bpf, uint32_t val)
{
  cs_bpf_op *op = expand_bpf_operands(bpf);

  op->type = BPF_OP_MSH;
  op->msh = val;
}

static void push_op_ext(cs_bpf *bpf, bpf_ext_type val)
{
  cs_bpf_op *op = expand_bpf_operands(bpf);

  op->type = BPF_OP_EXT;
  op->ext = val;
}

static void convert_operands(MCInst *MI, cs_bpf *bpf)
{
  unsigned opcode = MCInst_getOpcode(MI);
  unsigned mc_op_count = MCInst_getNumOperands(MI);
  MCOperand *op;
  MCOperand *op2;

  bpf->op_count = 0;
  if (BPF_CLASS(opcode) == BPF_CLASS_LD ||
      BPF_CLASS(opcode) == BPF_CLASS_LDX) {
    switch (BPF_MODE(opcode)) {
    case BPF_MODE_IMM:
      if (EBPF_MODE(MI->csh->mode)) {
        push_op_reg(bpf,
              MCOperand_getReg(
                MCInst_getOperand(MI, 0)),
              CS_AC_WRITE);
        push_op_imm(bpf,
              MCOperand_getImm(
                MCInst_getOperand(MI, 1)),
              false);
      } else {
        push_op_imm(bpf,
              MCOperand_getImm(
                MCInst_getOperand(MI, 0)),
              false);
      }
      break;
    case BPF_MODE_ABS:
      op = MCInst_getOperand(MI, 0);
      push_op_mem(bpf, BPF_REG_INVALID,
            (uint32_t)MCOperand_getImm(op), EBPF_MODE(MI->csh->mode), true);
      break;
    case BPF_MODE_IND:
      op = MCInst_getOperand(MI, 0);
      if (EBPF_MODE(MI->csh->mode))
        push_op_mem(bpf, MCOperand_getReg(op), 0x0,
              true, true);
      else {
        op2 = MCInst_getOperand(MI, 1);
        push_op_mem(bpf, MCOperand_getReg(op),
              (uint32_t)MCOperand_getImm(op2),
              false, true);
      }
      break;
    case BPF_MODE_MEM:
      if (EBPF_MODE(MI->csh->mode)) {
        /* ldx{w,h,b,dw} dst, [src+off] */
        push_op_reg(bpf,
              MCOperand_getReg(
                MCInst_getOperand(MI, 0)),
              CS_AC_WRITE);
        op = MCInst_getOperand(MI, 1);
        op2 = MCInst_getOperand(MI, 2);
        push_op_mem(bpf, MCOperand_getReg(op),
              (uint32_t)MCOperand_getImm(op2),
              true, false);
      } else {
        push_op_mmem(bpf,
               (uint32_t)MCOperand_getImm(
                 MCInst_getOperand(MI, 0)));
      }
      break;
    case BPF_MODE_LEN:
      push_op_ext(bpf, BPF_EXT_LEN);
      break;
    case BPF_MODE_MSH:
      op = MCInst_getOperand(MI, 0);
      push_op_msh(bpf, (uint32_t)MCOperand_getImm(op));
      break;
      /* case BPF_MODE_XADD: // not exists */
    }
    return;
  }
  if (BPF_CLASS(opcode) == BPF_CLASS_ST ||
      BPF_CLASS(opcode) == BPF_CLASS_STX) {
    if (!EBPF_MODE(MI->csh->mode)) {
      // cBPF has only one case - st* M[k]
      push_op_mmem(bpf, (uint32_t)MCOperand_getImm(
              MCInst_getOperand(MI, 0)));
      return;
    }
    /* eBPF has two cases:
     * - st [dst + off], src
     * - xadd [dst + off], src
     * they have same form of operands.
     */
    op = MCInst_getOperand(MI, 0);
    op2 = MCInst_getOperand(MI, 1);
    push_op_mem(bpf, MCOperand_getReg(op),
          (uint32_t)MCOperand_getImm(op2), true, false);

    op = MCInst_getOperand(MI, 2);
    if (MCOperand_isImm(op))
      push_op_imm(bpf, MCOperand_getImm(op), false);
    else if (MCOperand_isReg(op))
      push_op_reg(bpf, MCOperand_getReg(op), CS_AC_READ);
    return;
  }

  {
    const bool is_jmp32 = EBPF_MODE(MI->csh->mode) &&
              (BPF_CLASS(opcode) == BPF_CLASS_JMP32);
    if (BPF_CLASS(opcode) == BPF_CLASS_JMP || is_jmp32) {
      for (size_t i = 0; i < mc_op_count; i++) {
        op = MCInst_getOperand(MI, i);
        if (MCOperand_isImm(op)) {
          /* Decide if we're using IMM or OFF here (and if OFF, then signed or unsigned):
           *
           * 1. any jump/jump32 + signed off (not including exit/call and ja on jump32) // eBPF 
           * 2. exit/call/ja + k // eBPF
           * 3. ja + unsigned off // cBPF (cBPF programs can only jump forwards) 
           * 4. any jump {x,k}, +jt, +jf // cBPF 
           * */

          if ((BPF_OP(opcode) == BPF_JUMP_JA &&
               !is_jmp32) ||
              (!EBPF_MODE(MI->csh->mode) &&
               i >= 1) ||
              (EBPF_MODE(MI->csh->mode) &&
               i == 2))
            push_op_off(
              bpf,
              MCOperand_getImm(op),
              EBPF_MODE(
                MI->csh->mode));
          else
            push_op_imm(
              bpf,
              MCOperand_getImm(op),
              true);
        } else if (MCOperand_isReg(op)) {
          push_op_reg(bpf, MCOperand_getReg(op),
                CS_AC_READ);
        }
      }
      return;
    }
  }

  if (!EBPF_MODE(MI->csh->mode)) {
    /* In cBPF mode, all registers in operands are accessed as read */
    for (size_t i = 0; i < mc_op_count; i++) {
      op = MCInst_getOperand(MI, i);
      if (MCOperand_isImm(op))
        push_op_imm(bpf, MCOperand_getImm(op), false);
      else if (MCOperand_isReg(op))
        push_op_reg(bpf, MCOperand_getReg(op),
              CS_AC_READ);
    }
    return;
  }

  /* remain cases are: eBPF mode && ALU */
  /* if (BPF_CLASS(opcode) == BPF_CLASS_ALU || BPF_CLASS(opcode) == BPF_CLASS_ALU64) */

  /* We have three types:
   * 1. {l,b}e dst               // dst = byteswap(dst)
   * 2. neg dst                  // dst = -dst
   * 3. <op> dst, {src_reg, imm} // dst = dst <op> src
   * so we can simply check the number of operands,
   * exactly one operand means we are in case 1. and 2.,
   * otherwise in case 3.
   */
  if (mc_op_count == 1) {
    op = MCInst_getOperand(MI, 0);
    push_op_reg(bpf, MCOperand_getReg(op),
          CS_AC_READ | CS_AC_WRITE);
  } else { // if (mc_op_count == 2)
    op = MCInst_getOperand(MI, 0);
    push_op_reg(bpf, MCOperand_getReg(op),
          CS_AC_READ | CS_AC_WRITE);

    op = MCInst_getOperand(MI, 1);
    if (MCOperand_isImm(op))
      push_op_imm(bpf, MCOperand_getImm(op), false);
    else if (MCOperand_isReg(op))
      push_op_reg(bpf, MCOperand_getReg(op), CS_AC_READ);
  }
}

static void print_operand(MCInst *MI, struct SStream *O, const cs_bpf_op *op)
{
  switch (op->type) {
  case BPF_OP_INVALID:
    SStream_concat(O, "invalid");
    break;
  case BPF_OP_REG:
    SStream_concat(O, BPF_reg_name((csh)MI->csh, op->reg));
    break;
  case BPF_OP_IMM:
    if (op->is_signed)
      printInt32Hex(O, op->imm);
    else
      SStream_concat(O, "0x%" PRIx64, op->imm);
    break;
  case BPF_OP_OFF:
    if (op->is_signed)
      printInt16HexOffset(O, op->off);
    else
      SStream_concat(O, "+0x%" PRIx32, op->off);
    break;
  case BPF_OP_MEM:
    SStream_concat(O, "[");

    if (op->is_pkt && EBPF_MODE(MI->csh->mode)) {
      SStream_concat(O, "skb");

      if (op->mem.base != BPF_REG_INVALID)
        SStream_concat(O, "+%s",
                 BPF_reg_name((csh)MI->csh,
                  op->mem.base));
      else {
        if (op->is_signed)
          printInt32HexOffset(O, op->mem.disp);
        else
          SStream_concat(O, "+0x%" PRIx32,
                   op->mem.disp);
      }
    } else {
      if (op->mem.base != BPF_REG_INVALID)
        SStream_concat(O, BPF_reg_name((csh)MI->csh,
                     op->mem.base));
      if (op->mem.disp != 0) {
        if (op->mem.base != BPF_REG_INVALID) {
          // if operation is signed, then it always uses off, not k
          if (op->is_signed)
            printInt16HexOffset(
              O, op->mem.disp);
          else if (op->is_pkt)
            SStream_concat(O, "+0x%" PRIx32,
                     op->mem.disp);
          else
            SStream_concat(O, "+0x%" PRIx16,
                     op->mem.disp);
        } else
          SStream_concat(O, "0x%" PRIx32,
                   op->mem.disp);
      }

      if (op->mem.base == BPF_REG_INVALID &&
          op->mem.disp == 0)
        SStream_concat(O, "0x0");
    }

    SStream_concat(O, "]");
    break;
  case BPF_OP_MMEM:
    SStream_concat(O, "m[0x%x]", op->mmem);
    break;
  case BPF_OP_MSH:
    SStream_concat(O, "4*([0x%x]&0xf)", op->msh);
    break;
  case BPF_OP_EXT:
    switch (op->ext) {
    case BPF_EXT_LEN:
      SStream_concat(O, "#len");
      break;
    }
    break;
  }
}

/*
 * 1. human readable mnemonic
 * 2. set pubOpcode (BPF_INSN_*)
 * 3. set detail->bpf.operands
 * */
void BPF_printInst(MCInst *MI, struct SStream *O, void *PrinterInfo)
{
  cs_bpf bpf = { 0 };

  /* set pubOpcode as instruction id */
  SStream_concat(O, BPF_insn_name((csh)MI->csh, MCInst_getOpcodePub(MI)));
  convert_operands(MI, &bpf);
  for (size_t i = 0; i < bpf.op_count; i++) {
    if (i == 0)
      SStream_concat(O, "\t");
    else
      SStream_concat(O, ", ");
    print_operand(MI, O, &bpf.operands[i]);
  }

#ifndef CAPSTONE_DIET
  if (detail_is_set(MI)) {
    MI->flat_insn->detail->bpf = bpf;
  }
#endif
}

Coverage Report

Created: 2025-07-11 06:32

Line	Count	Source (jump to first uncovered line)
1		/* Capstone Disassembly Engine */
2		/* BPF Backend by david942j <david942j@gmail.com>, 2019 */
3		/* SPDX-FileCopyrightText: 2024 Roee Toledano <roeetoledano10@gmail.com> */
4		/* SPDX-License-Identifier: BSD-3 */
5
6		#include <capstone/platform.h>
7
8		#include "BPFConstants.h"
9		#include "BPFInstPrinter.h"
10		#include "BPFMapping.h"
11		#include "../../Mapping.h"
12
13		static cs_bpf_op expand_bpf_operands(cs_bpf bpf)
14	33.7k	{
15	33.7k	assert(bpf->op_count < 3);
16	33.7k	return &bpf->operands[bpf->op_count++];
17	33.7k	}
18
19		static void push_op_reg(cs_bpf *bpf, bpf_op_type val, uint8_t ac_mode)
20	19.0k	{
21	19.0k	cs_bpf_op *op = expand_bpf_operands(bpf);
22
23	19.0k	op->type = BPF_OP_REG;
24	19.0k	op->reg = val;
25	19.0k	op->access = ac_mode;
26	19.0k	}
27
28		static void push_op_imm(cs_bpf *bpf, uint64_t val, const bool is_signed)
29	15.5k	{
30	15.5k	cs_bpf_op *op = expand_bpf_operands(bpf);
31
32	15.5k	op->type = BPF_OP_IMM;
33	15.5k	op->imm = val;
34	15.5k	op->is_signed = is_signed;
35	15.5k	}
36
37		static void push_op_off(cs_bpf *bpf, uint32_t val, const bool is_signed)
38	9.77k	{
39	9.77k	cs_bpf_op *op = expand_bpf_operands(bpf);
40
41	9.77k	op->type = BPF_OP_OFF;
42	9.77k	op->off = val;
43	9.77k	op->is_signed = is_signed;
44	9.77k	}
45
46		static void push_op_mem(cs_bpf *bpf, bpf_reg reg, uint32_t val,
47		const bool is_signed, const bool is_pkt)
48	8.36k	{
49	8.36k	cs_bpf_op *op = expand_bpf_operands(bpf);
50
51	8.36k	op->type = BPF_OP_MEM;
52	8.36k	op->mem.base = reg;
53	8.36k	op->mem.disp = val;
54	8.36k	op->is_signed = is_signed;
55	8.36k	op->is_pkt = is_pkt;
56	8.36k	}
57
58		static void push_op_mmem(cs_bpf *bpf, uint32_t val)
59	502	{
60	502	cs_bpf_op *op = expand_bpf_operands(bpf);
61
62	502	op->type = BPF_OP_MMEM;
63	502	op->mmem = val;
64	502	}
65
66		static void push_op_msh(cs_bpf *bpf, uint32_t val)
67	474	{
68	474	cs_bpf_op *op = expand_bpf_operands(bpf);
69
70	474	op->type = BPF_OP_MSH;
71	474	op->msh = val;
72	474	}
73
74		static void push_op_ext(cs_bpf *bpf, bpf_ext_type val)
75	446	{
76	446	cs_bpf_op *op = expand_bpf_operands(bpf);
77
78	446	op->type = BPF_OP_EXT;
79	446	op->ext = val;
80	446	}
81
82		static void convert_operands(MCInst MI, cs_bpf bpf)
83	18.7k	{
84	18.7k	unsigned opcode = MCInst_getOpcode(MI);
85	18.7k	unsigned mc_op_count = MCInst_getNumOperands(MI);
86	18.7k	MCOperand *op;
87	18.7k	MCOperand *op2;
88
89	18.7k	bpf->op_count = 0;
90	18.7k	if (BPF_CLASS(opcode) == BPF_CLASS_LD \|\|
91	18.7k	BPF_CLASS(opcode) == BPF_CLASS_LDX) {
92	4.52k	switch (BPF_MODE(opcode)) {
93	620	case BPF_MODE_IMM:
94	620	if (EBPF_MODE(MI->csh->mode)) {
95	208	push_op_reg(bpf,
96	208	MCOperand_getReg(
97	208	MCInst_getOperand(MI, 0)),
98	208	CS_AC_WRITE);
99	208	push_op_imm(bpf,
100	208	MCOperand_getImm(
101	208	MCInst_getOperand(MI, 1)),
102	208	false);
103	412	} else {
104	412	push_op_imm(bpf,
105	412	MCOperand_getImm(
106	412	MCInst_getOperand(MI, 0)),
107	412	false);
108	412	}
109	620	break;
110	1.65k	case BPF_MODE_ABS:
111	1.65k	op = MCInst_getOperand(MI, 0);
112	1.65k	push_op_mem(bpf, BPF_REG_INVALID,
113	1.65k	(uint32_t)MCOperand_getImm(op), EBPF_MODE(MI->csh->mode), true);
114	1.65k	break;
115	791	case BPF_MODE_IND:
116	791	op = MCInst_getOperand(MI, 0);
117	791	if (EBPF_MODE(MI->csh->mode))
118	408	push_op_mem(bpf, MCOperand_getReg(op), 0x0,
119	408	true, true);
120	383	else {
121	383	op2 = MCInst_getOperand(MI, 1);
122	383	push_op_mem(bpf, MCOperand_getReg(op),
123	383	(uint32_t)MCOperand_getImm(op2),
124	383	false, true);
125	383	}
126	791	break;
127	1.01k	case BPF_MODE_MEM:
128	1.01k	if (EBPF_MODE(MI->csh->mode)) {
129		/* ldx{w,h,b,dw} dst, [src+off] */
130	818	push_op_reg(bpf,
131	818	MCOperand_getReg(
132	818	MCInst_getOperand(MI, 0)),
133	818	CS_AC_WRITE);
134	818	op = MCInst_getOperand(MI, 1);
135	818	op2 = MCInst_getOperand(MI, 2);
136	818	push_op_mem(bpf, MCOperand_getReg(op),
137	818	(uint32_t)MCOperand_getImm(op2),
138	818	true, false);
139	818	} else {
140	199	push_op_mmem(bpf,
141	199	(uint32_t)MCOperand_getImm(
142	199	MCInst_getOperand(MI, 0)));
143	199	}
144	1.01k	break;
145	247	case BPF_MODE_LEN:
146	247	push_op_ext(bpf, BPF_EXT_LEN);
147	247	break;
148	195	case BPF_MODE_MSH:
149	195	op = MCInst_getOperand(MI, 0);
150	195	push_op_msh(bpf, (uint32_t)MCOperand_getImm(op));
151	195	break;
152		/* case BPF_MODE_XADD: // not exists */
153	4.52k	}
154	4.52k	return;
155	4.52k	}
156	14.2k	if (BPF_CLASS(opcode) == BPF_CLASS_ST \|\|
157	14.2k	BPF_CLASS(opcode) == BPF_CLASS_STX) {
158	1.38k	if (!EBPF_MODE(MI->csh->mode)) {
159		// cBPF has only one case - st* M[k]
160	54	push_op_mmem(bpf, (uint32_t)MCOperand_getImm(
161	54	MCInst_getOperand(MI, 0)));
162	54	return;
163	54	}
164		/* eBPF has two cases:
165		* - st [dst + off], src
166		* - xadd [dst + off], src
167		* they have same form of operands.
168		*/
169	1.32k	op = MCInst_getOperand(MI, 0);
170	1.32k	op2 = MCInst_getOperand(MI, 1);
171	1.32k	push_op_mem(bpf, MCOperand_getReg(op),
172	1.32k	(uint32_t)MCOperand_getImm(op2), true, false);
173
174	1.32k	op = MCInst_getOperand(MI, 2);
175	1.32k	if (MCOperand_isImm(op))
176	592	push_op_imm(bpf, MCOperand_getImm(op), false);
177	736	else if (MCOperand_isReg(op))
178	736	push_op_reg(bpf, MCOperand_getReg(op), CS_AC_READ);
179	1.32k	return;
180	1.38k	}
181
182	12.8k	{
183	12.8k	const bool is_jmp32 = EBPF_MODE(MI->csh->mode) &&
184	12.8k	(BPF_CLASS(opcode) == BPF_CLASS_JMP32);
185	12.8k	if (BPF_CLASS(opcode) == BPF_CLASS_JMP \|\| is_jmp32) {
186	22.7k	for (size_t i = 0; i < mc_op_count; i++) {
187	16.5k	op = MCInst_getOperand(MI, i);
188	16.5k	if (MCOperand_isImm(op)) {
189		/* Decide if we're using IMM or OFF here (and if OFF, then signed or unsigned):
190		*
191		* 1. any jump/jump32 + signed off (not including exit/call and ja on jump32) // eBPF
192		* 2. exit/call/ja + k // eBPF
193		* 3. ja + unsigned off // cBPF (cBPF programs can only jump forwards)
194		* 4. any jump {x,k}, +jt, +jf // cBPF
195		* */
196
197	11.9k	if ((BPF_OP(opcode) == BPF_JUMP_JA &&
198	11.9k	!is_jmp32) \|\|
199	11.9k	(!EBPF_MODE(MI->csh->mode) &&
200	11.6k	i >= 1) \|\|
201	11.9k	(EBPF_MODE(MI->csh->mode) &&
202	9.34k	i == 2))
203	6.73k	push_op_off(
204	6.73k	bpf,
205	6.73k	MCOperand_getImm(op),
206	6.73k	EBPF_MODE(
207	6.73k	MI->csh->mode));
208	5.22k	else
209	5.22k	push_op_imm(
210	5.22k	bpf,
211	5.22k	MCOperand_getImm(op),
212	5.22k	true);
213	11.9k	} else if (MCOperand_isReg(op)) {
214	4.59k	push_op_reg(bpf, MCOperand_getReg(op),
215	4.59k	CS_AC_READ);
216	4.59k	}
217	16.5k	}
218	6.23k	return;
219	6.23k	}
220	12.8k	}
221
222	6.62k	if (!EBPF_MODE(MI->csh->mode)) {
223		/* In cBPF mode, all registers in operands are accessed as read */
224	5.79k	for (size_t i = 0; i < mc_op_count; i++) {
225	2.75k	op = MCInst_getOperand(MI, i);
226	2.75k	if (MCOperand_isImm(op))
227	1.08k	push_op_imm(bpf, MCOperand_getImm(op), false);
228	1.67k	else if (MCOperand_isReg(op))
229	1.67k	push_op_reg(bpf, MCOperand_getReg(op),
230	1.67k	CS_AC_READ);
231	2.75k	}
232	3.03k	return;
233	3.03k	}
234
235		/* remain cases are: eBPF mode && ALU */
236		/* if (BPF_CLASS(opcode) == BPF_CLASS_ALU \|\| BPF_CLASS(opcode) == BPF_CLASS_ALU64) */
237
238		/* We have three types:
239		* 1. {l,b}e dst // dst = byteswap(dst)
240		* 2. neg dst // dst = -dst
241		* 3. <op> dst, {src_reg, imm} // dst = dst <op> src
242		* so we can simply check the number of operands,
243		* exactly one operand means we are in case 1. and 2.,
244		* otherwise in case 3.
245		*/
246	3.59k	if (mc_op_count == 1) {
247	974	op = MCInst_getOperand(MI, 0);
248	974	push_op_reg(bpf, MCOperand_getReg(op),
249	974	CS_AC_READ \| CS_AC_WRITE);
250	2.62k	} else { // if (mc_op_count == 2)
251	2.62k	op = MCInst_getOperand(MI, 0);
252	2.62k	push_op_reg(bpf, MCOperand_getReg(op),
253	2.62k	CS_AC_READ \| CS_AC_WRITE);
254
255	2.62k	op = MCInst_getOperand(MI, 1);
256	2.62k	if (MCOperand_isImm(op))
257	2.35k	push_op_imm(bpf, MCOperand_getImm(op), false);
258	263	else if (MCOperand_isReg(op))
259	263	push_op_reg(bpf, MCOperand_getReg(op), CS_AC_READ);
260	2.62k	}
261	3.59k	}
262
263		static void print_operand(MCInst MI, struct SStream O, const cs_bpf_op *op)
264	33.7k	{
265	33.7k	switch (op->type) {
266	0	case BPF_OP_INVALID:
267	0	SStream_concat(O, "invalid");
268	0	break;
269	11.8k	case BPF_OP_REG:
270	11.8k	SStream_concat(O, BPF_reg_name((csh)MI->csh, op->reg));
271	11.8k	break;
272	9.87k	case BPF_OP_IMM:
273	9.87k	if (op->is_signed)
274	5.22k	printInt32Hex(O, op->imm);
275	4.64k	else
276	4.64k	SStream_concat(O, "0x%" PRIx64, op->imm);
277	9.87k	break;
278	6.73k	case BPF_OP_OFF:
279	6.73k	if (op->is_signed)
280	4.33k	printInt16HexOffset(O, op->off);
281	2.40k	else
282	2.40k	SStream_concat(O, "+0x%" PRIx32, op->off);
283	6.73k	break;
284	4.59k	case BPF_OP_MEM:
285	4.59k	SStream_concat(O, "[");
286
287	4.59k	if (op->is_pkt && EBPF_MODE(MI->csh->mode)) {
288	1.57k	SStream_concat(O, "skb");
289
290	1.57k	if (op->mem.base != BPF_REG_INVALID)
291	408	SStream_concat(O, "+%s",
292	408	BPF_reg_name((csh)MI->csh,
293	408	op->mem.base));
294	1.16k	else {
295	1.16k	if (op->is_signed)
296	1.16k	printInt32HexOffset(O, op->mem.disp);
297	0	else
298	0	SStream_concat(O, "+0x%" PRIx32,
299	0	op->mem.disp);
300	1.16k	}
301	3.01k	} else {
302	3.01k	if (op->mem.base != BPF_REG_INVALID)
303	2.52k	SStream_concat(O, BPF_reg_name((csh)MI->csh,
304	2.52k	op->mem.base));
305	3.01k	if (op->mem.disp != 0) {
306	2.91k	if (op->mem.base != BPF_REG_INVALID) {
307		// if operation is signed, then it always uses off, not k
308	2.44k	if (op->is_signed)
309	2.06k	printInt16HexOffset(
310	2.06k	O, op->mem.disp);
311	382	else if (op->is_pkt)
312	382	SStream_concat(O, "+0x%" PRIx32,
313	382	op->mem.disp);
314	0	else
315	0	SStream_concat(O, "+0x%" PRIx16,
316	0	op->mem.disp);
317	2.44k	} else
318	465	SStream_concat(O, "0x%" PRIx32,
319	465	op->mem.disp);
320	2.91k	}
321
322	3.01k	if (op->mem.base == BPF_REG_INVALID &&
323	3.01k	op->mem.disp == 0)
324	22	SStream_concat(O, "0x0");
325	3.01k	}
326
327	4.59k	SStream_concat(O, "]");
328	4.59k	break;
329	253	case BPF_OP_MMEM:
330	253	SStream_concat(O, "m[0x%x]", op->mmem);
331	253	break;
332	195	case BPF_OP_MSH:
333	195	SStream_concat(O, "4*([0x%x]&0xf)", op->msh);
334	195	break;
335	247	case BPF_OP_EXT:
336	247	switch (op->ext) {
337	247	case BPF_EXT_LEN:
338	247	SStream_concat(O, "#len");
339	247	break;
340	247	}
341	247	break;
342	33.7k	}
343	33.7k	}
344
345		/*
346		* 1. human readable mnemonic
347		* 2. set pubOpcode (BPF_INSN_*)
348		* 3. set detail->bpf.operands
349		* */
350		void BPF_printInst(MCInst MI, struct SStream O, void *PrinterInfo)
351	31.7k	{
352	31.7k	cs_bpf bpf = { 0 };
353
354		/* set pubOpcode as instruction id */
355	31.7k	SStream_concat(O, BPF_insn_name((csh)MI->csh, MCInst_getOpcodePub(MI)));
356	31.7k	convert_operands(MI, &bpf);
357	85.9k	for (size_t i = 0; i < bpf.op_count; i++) {
358	54.1k	if (i == 0)
359	30.5k	SStream_concat(O, "\t");
360	23.6k	else
361	23.6k	SStream_concat(O, ", ");
362	54.1k	print_operand(MI, O, &bpf.operands[i]);
363	54.1k	}
364
365	31.7k	#ifndef CAPSTONE_DIET
366	31.7k	if (detail_is_set(MI)) {
367	31.7k	MI->flat_insn->detail->bpf = bpf;
368	31.7k	}
369	31.7k	#endif
370	31.7k	}