kernel/bpf/disasm.c - linux - Git at Google

 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
  * Copyright (c) 2016 Facebook
  */

 #include <linux/bpf.h>

 #include "disasm.h"

 #define __BPF_FUNC_STR_FN(x) [BPF_FUNC_ ## x] = __stringify(bpf_ ## x)
 static const char * const func_id_str[] = {
 	__BPF_FUNC_MAPPER(__BPF_FUNC_STR_FN)
 };
 #undef __BPF_FUNC_STR_FN

 static const char *__func_get_name(const struct bpf_insn_cbs *cbs,
 				   const struct bpf_insn *insn,
 				   char *buff, size_t len)
 {
 	BUILD_BUG_ON(ARRAY_SIZE(func_id_str) != __BPF_FUNC_MAX_ID);

 	if (!insn->src_reg &&
 	    insn->imm >= 0 && insn->imm < __BPF_FUNC_MAX_ID &&
 	    func_id_str[insn->imm])
 		return func_id_str[insn->imm];

 	if (cbs && cbs->cb_call) {
 		const char *res;

 		res = cbs->cb_call(cbs->private_data, insn);
 		if (res)
 			return res;
 	}

 	if (insn->src_reg == BPF_PSEUDO_CALL)
 		snprintf(buff, len, "%+d", insn->imm);
 	else if (insn->src_reg == BPF_PSEUDO_KFUNC_CALL)
 		snprintf(buff, len, "kernel-function");

 	return buff;
 }

 static const char *__func_imm_name(const struct bpf_insn_cbs *cbs,
 				   const struct bpf_insn *insn,
 				   u64 full_imm, char *buff, size_t len)
 {
 	if (cbs && cbs->cb_imm)
 		return cbs->cb_imm(cbs->private_data, insn, full_imm);

 	snprintf(buff, len, "0x%llx", (unsigned long long)full_imm);
 	return buff;
 }

 const char *func_id_name(int id)
 {
 	if (id >= 0 && id < __BPF_FUNC_MAX_ID && func_id_str[id])
 		return func_id_str[id];
 	else
 		return "unknown";
 }

 const char *const bpf_class_string[8] = {
 	[BPF_LD]    = "ld",
 	[BPF_LDX]   = "ldx",
 	[BPF_ST]    = "st",
 	[BPF_STX]   = "stx",
 	[BPF_ALU]   = "alu",
 	[BPF_JMP]   = "jmp",
 	[BPF_JMP32] = "jmp32",
 	[BPF_ALU64] = "alu64",
 };

 const char *const bpf_alu_string[16] = {
 	[BPF_ADD >> 4]  = "+=",
 	[BPF_SUB >> 4]  = "-=",
 	[BPF_MUL >> 4]  = "*=",
 	[BPF_DIV >> 4]  = "/=",
 	[BPF_OR  >> 4]  = "|=",
 	[BPF_AND >> 4]  = "&=",
 	[BPF_LSH >> 4]  = "<<=",
 	[BPF_RSH >> 4]  = ">>=",
 	[BPF_NEG >> 4]  = "neg",
 	[BPF_MOD >> 4]  = "%=",
 	[BPF_XOR >> 4]  = "^=",
 	[BPF_MOV >> 4]  = "=",
 	[BPF_ARSH >> 4] = "s>>=",
 	[BPF_END >> 4]  = "endian",
 };

 static const char *const bpf_alu_sign_string[16] = {
 	[BPF_DIV >> 4]  = "s/=",
 	[BPF_MOD >> 4]  = "s%=",
 };

 static const char *const bpf_movsx_string[4] = {
 	[0] = "(s8)",
 	[1] = "(s16)",
 	[3] = "(s32)",
 };

 static const char *const bpf_atomic_alu_string[16] = {
 	[BPF_ADD >> 4]  = "add",
 	[BPF_AND >> 4]  = "and",
 	[BPF_OR >> 4]  = "or",
 	[BPF_XOR >> 4]  = "xor",
 };

 static const char *const bpf_ldst_string[] = {
 	[BPF_W >> 3]  = "u32",
 	[BPF_H >> 3]  = "u16",
 	[BPF_B >> 3]  = "u8",
 	[BPF_DW >> 3] = "u64",
 };

 static const char *const bpf_ldsx_string[] = {
 	[BPF_W >> 3]  = "s32",
 	[BPF_H >> 3]  = "s16",
 	[BPF_B >> 3]  = "s8",
 };

 static const char *const bpf_jmp_string[16] = {
 	[BPF_JA >> 4]   = "jmp",
 	[BPF_JEQ >> 4]  = "==",
 	[BPF_JGT >> 4]  = ">",
 	[BPF_JLT >> 4]  = "<",
 	[BPF_JGE >> 4]  = ">=",
 	[BPF_JLE >> 4]  = "<=",
 	[BPF_JSET >> 4] = "&",
 	[BPF_JNE >> 4]  = "!=",
 	[BPF_JSGT >> 4] = "s>",
 	[BPF_JSLT >> 4] = "s<",
 	[BPF_JSGE >> 4] = "s>=",
 	[BPF_JSLE >> 4] = "s<=",
 	[BPF_CALL >> 4] = "call",
 	[BPF_EXIT >> 4] = "exit",
 };

 static void print_bpf_end_insn(bpf_insn_print_t verbose,
 			       void *private_data,
 			       const struct bpf_insn *insn)
 {
 	verbose(private_data, "(%02x) r%d = %s%d r%d\n",
 		insn->code, insn->dst_reg,
 		BPF_SRC(insn->code) == BPF_TO_BE ? "be" : "le",
 		insn->imm, insn->dst_reg);
 }

 static void print_bpf_bswap_insn(bpf_insn_print_t verbose,
 			       void *private_data,
 			       const struct bpf_insn *insn)
 {
 	verbose(private_data, "(%02x) r%d = bswap%d r%d\n",
 		insn->code, insn->dst_reg,
 		insn->imm, insn->dst_reg);
 }

 static bool is_sdiv_smod(const struct bpf_insn *insn)
 {
 	return (BPF_OP(insn->code)  == BPF_DIV || BPF_OP(insn->code) == BPF_MOD) &&
 	       insn->off == 1;
 }

 static bool is_movsx(const struct bpf_insn *insn)
 {
 	return BPF_OP(insn->code) == BPF_MOV &&
 	       (insn->off == 8 || insn->off == 16 || insn->off == 32);
 }

 static bool is_addr_space_cast(const struct bpf_insn *insn)
 {
 	return insn->code == (BPF_ALU64 | BPF_MOV | BPF_X) &&
 		insn->off == BPF_ADDR_SPACE_CAST;
 }

 void print_bpf_insn(const struct bpf_insn_cbs *cbs,
 		    const struct bpf_insn *insn,
 		    bool allow_ptr_leaks)
 {
 	const bpf_insn_print_t verbose = cbs->cb_print;
 	u8 class = BPF_CLASS(insn->code);

 	if (class == BPF_ALU || class == BPF_ALU64) {
 		if (BPF_OP(insn->code) == BPF_END) {
 			if (class == BPF_ALU64)
 				print_bpf_bswap_insn(verbose, cbs->private_data, insn);
 			else
 				print_bpf_end_insn(verbose, cbs->private_data, insn);
 		} else if (BPF_OP(insn->code) == BPF_NEG) {
 			verbose(cbs->private_data, "(%02x) %c%d = -%c%d\n",
 				insn->code, class == BPF_ALU ? 'w' : 'r',
 				insn->dst_reg, class == BPF_ALU ? 'w' : 'r',
 				insn->dst_reg);
 		} else if (is_addr_space_cast(insn)) {
 			verbose(cbs->private_data, "(%02x) r%d = addr_space_cast(r%d, %d, %d)\n",
 				insn->code, insn->dst_reg,
 				insn->src_reg, ((u32)insn->imm) >> 16, (u16)insn->imm);
 		} else if (BPF_SRC(insn->code) == BPF_X) {
 			verbose(cbs->private_data, "(%02x) %c%d %s %s%c%d\n",
 				insn->code, class == BPF_ALU ? 'w' : 'r',
 				insn->dst_reg,
 				is_sdiv_smod(insn) ? bpf_alu_sign_string[BPF_OP(insn->code) >> 4]
 						   : bpf_alu_string[BPF_OP(insn->code) >> 4],
 				is_movsx(insn) ? bpf_movsx_string[(insn->off >> 3) - 1] : "",
 				class == BPF_ALU ? 'w' : 'r',
 				insn->src_reg);
 		} else {
 			verbose(cbs->private_data, "(%02x) %c%d %s %d\n",
 				insn->code, class == BPF_ALU ? 'w' : 'r',
 				insn->dst_reg,
 				is_sdiv_smod(insn) ? bpf_alu_sign_string[BPF_OP(insn->code) >> 4]
 						   : bpf_alu_string[BPF_OP(insn->code) >> 4],
 				insn->imm);
 		}
 	} else if (class == BPF_STX) {
 		if (BPF_MODE(insn->code) == BPF_MEM)
 			verbose(cbs->private_data, "(%02x) *(%s *)(r%d %+d) = r%d\n",
 				insn->code,
 				bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
 				insn->dst_reg,
 				insn->off, insn->src_reg);
 		else if (BPF_MODE(insn->code) == BPF_ATOMIC &&
 			 (insn->imm == BPF_ADD || insn->imm == BPF_AND ||
 			  insn->imm == BPF_OR || insn->imm == BPF_XOR)) {
 			verbose(cbs->private_data, "(%02x) lock *(%s *)(r%d %+d) %s r%d\n",
 				insn->code,
 				bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
 				insn->dst_reg, insn->off,
 				bpf_alu_string[BPF_OP(insn->imm) >> 4],
 				insn->src_reg);
 		} else if (BPF_MODE(insn->code) == BPF_ATOMIC &&
 			   (insn->imm == (BPF_ADD | BPF_FETCH) ||
 			    insn->imm == (BPF_AND | BPF_FETCH) ||
 			    insn->imm == (BPF_OR | BPF_FETCH) ||
 			    insn->imm == (BPF_XOR | BPF_FETCH))) {
 			verbose(cbs->private_data, "(%02x) r%d = atomic%s_fetch_%s((%s *)(r%d %+d), r%d)\n",
 				insn->code, insn->src_reg,
 				BPF_SIZE(insn->code) == BPF_DW ? "64" : "",
 				bpf_atomic_alu_string[BPF_OP(insn->imm) >> 4],
 				bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
 				insn->dst_reg, insn->off, insn->src_reg);
 		} else if (BPF_MODE(insn->code) == BPF_ATOMIC &&
 			   insn->imm == BPF_CMPXCHG) {
 			verbose(cbs->private_data, "(%02x) r0 = atomic%s_cmpxchg((%s *)(r%d %+d), r0, r%d)\n",
 				insn->code,
 				BPF_SIZE(insn->code) == BPF_DW ? "64" : "",
 				bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
 				insn->dst_reg, insn->off,
 				insn->src_reg);
 		} else if (BPF_MODE(insn->code) == BPF_ATOMIC &&
 			   insn->imm == BPF_XCHG) {
 			verbose(cbs->private_data, "(%02x) r%d = atomic%s_xchg((%s *)(r%d %+d), r%d)\n",
 				insn->code, insn->src_reg,
 				BPF_SIZE(insn->code) == BPF_DW ? "64" : "",
 				bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
 				insn->dst_reg, insn->off, insn->src_reg);
 		} else {
 			verbose(cbs->private_data, "BUG_%02x\n", insn->code);
 		}
 	} else if (class == BPF_ST) {
 		if (BPF_MODE(insn->code) == BPF_MEM) {
 			verbose(cbs->private_data, "(%02x) *(%s *)(r%d %+d) = %d\n",
 				insn->code,
 				bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
 				insn->dst_reg,
 				insn->off, insn->imm);
 		} else if (BPF_MODE(insn->code) == 0xc0 /* BPF_NOSPEC, no UAPI */) {
 			verbose(cbs->private_data, "(%02x) nospec\n", insn->code);
 		} else {
 			verbose(cbs->private_data, "BUG_st_%02x\n", insn->code);
 		}
 	} else if (class == BPF_LDX) {
 		if (BPF_MODE(insn->code) != BPF_MEM && BPF_MODE(insn->code) != BPF_MEMSX) {
 			verbose(cbs->private_data, "BUG_ldx_%02x\n", insn->code);
 			return;
 		}
 		verbose(cbs->private_data, "(%02x) r%d = *(%s *)(r%d %+d)\n",
 			insn->code, insn->dst_reg,
 			BPF_MODE(insn->code) == BPF_MEM ?
 				 bpf_ldst_string[BPF_SIZE(insn->code) >> 3] :
 				 bpf_ldsx_string[BPF_SIZE(insn->code) >> 3],
 			insn->src_reg, insn->off);
 	} else if (class == BPF_LD) {
 		if (BPF_MODE(insn->code) == BPF_ABS) {
 			verbose(cbs->private_data, "(%02x) r0 = *(%s *)skb[%d]\n",
 				insn->code,
 				bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
 				insn->imm);
 		} else if (BPF_MODE(insn->code) == BPF_IND) {
 			verbose(cbs->private_data, "(%02x) r0 = *(%s *)skb[r%d + %d]\n",
 				insn->code,
 				bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
 				insn->src_reg, insn->imm);
 		} else if (BPF_MODE(insn->code) == BPF_IMM &&
 			   BPF_SIZE(insn->code) == BPF_DW) {
 			/* At this point, we already made sure that the second
 			 * part of the ldimm64 insn is accessible.
 			 */
 			u64 imm = ((u64)(insn + 1)->imm << 32) | (u32)insn->imm;
 			bool is_ptr = insn->src_reg == BPF_PSEUDO_MAP_FD ||
 				      insn->src_reg == BPF_PSEUDO_MAP_VALUE;
 			char tmp[64];

 			if (is_ptr && !allow_ptr_leaks)
 				imm = 0;

 			verbose(cbs->private_data, "(%02x) r%d = %s\n",
 				insn->code, insn->dst_reg,
 				__func_imm_name(cbs, insn, imm,
 						tmp, sizeof(tmp)));
 		} else {
 			verbose(cbs->private_data, "BUG_ld_%02x\n", insn->code);
 			return;
 		}
 	} else if (class == BPF_JMP32 || class == BPF_JMP) {
 		u8 opcode = BPF_OP(insn->code);

 		if (opcode == BPF_CALL) {
 			char tmp[64];

 			if (insn->src_reg == BPF_PSEUDO_CALL) {
 				verbose(cbs->private_data, "(%02x) call pc%s\n",
 					insn->code,
 					__func_get_name(cbs, insn,
 							tmp, sizeof(tmp)));
 			} else {
 				strcpy(tmp, "unknown");
 				verbose(cbs->private_data, "(%02x) call %s#%d\n", insn->code,
 					__func_get_name(cbs, insn,
 							tmp, sizeof(tmp)),
 					insn->imm);
 			}
 		} else if (insn->code == (BPF_JMP | BPF_JA)) {
 			verbose(cbs->private_data, "(%02x) goto pc%+d\n",
 				insn->code, insn->off);
 		} else if (insn->code == (BPF_JMP | BPF_JCOND) &&
 			   insn->src_reg == BPF_MAY_GOTO) {
 			verbose(cbs->private_data, "(%02x) may_goto pc%+d\n",
 				insn->code, insn->off);
 		} else if (insn->code == (BPF_JMP32 | BPF_JA)) {
 			verbose(cbs->private_data, "(%02x) gotol pc%+d\n",
 				insn->code, insn->imm);
 		} else if (insn->code == (BPF_JMP | BPF_EXIT)) {
 			verbose(cbs->private_data, "(%02x) exit\n", insn->code);
 		} else if (BPF_SRC(insn->code) == BPF_X) {
 			verbose(cbs->private_data,
 				"(%02x) if %c%d %s %c%d goto pc%+d\n",
 				insn->code, class == BPF_JMP32 ? 'w' : 'r',
 				insn->dst_reg,
 				bpf_jmp_string[BPF_OP(insn->code) >> 4],
 				class == BPF_JMP32 ? 'w' : 'r',
 				insn->src_reg, insn->off);
 		} else {
 			verbose(cbs->private_data,
 				"(%02x) if %c%d %s 0x%x goto pc%+d\n",
 				insn->code, class == BPF_JMP32 ? 'w' : 'r',
 				insn->dst_reg,
 				bpf_jmp_string[BPF_OP(insn->code) >> 4],
 				insn->imm, insn->off);
 		}
 	} else {
 		verbose(cbs->private_data, "(%02x) %s\n",
 			insn->code, bpf_class_string[class]);
 	}
 }
	// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
	/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
	* Copyright (c) 2016 Facebook
	*/

	#include <linux/bpf.h>

	#include "disasm.h"

	#define __BPF_FUNC_STR_FN(x) [BPF_FUNC_ ## x] = __stringify(bpf_ ## x)
	static const char * const func_id_str[] = {
	__BPF_FUNC_MAPPER(__BPF_FUNC_STR_FN)
	};
	#undef __BPF_FUNC_STR_FN

	static const char __func_get_name(const struct bpf_insn_cbs cbs,
	const struct bpf_insn *insn,
	char *buff, size_t len)
	{
	BUILD_BUG_ON(ARRAY_SIZE(func_id_str) != __BPF_FUNC_MAX_ID);

	if (!insn->src_reg &&
	insn->imm >= 0 && insn->imm < __BPF_FUNC_MAX_ID &&
	func_id_str[insn->imm])
	return func_id_str[insn->imm];

	if (cbs && cbs->cb_call) {
	const char *res;

	res = cbs->cb_call(cbs->private_data, insn);
	if (res)
	return res;
	}

	if (insn->src_reg == BPF_PSEUDO_CALL)
	snprintf(buff, len, "%+d", insn->imm);
	else if (insn->src_reg == BPF_PSEUDO_KFUNC_CALL)
	snprintf(buff, len, "kernel-function");

	return buff;
	}

	static const char __func_imm_name(const struct bpf_insn_cbs cbs,
	const struct bpf_insn *insn,
	u64 full_imm, char *buff, size_t len)
	{
	if (cbs && cbs->cb_imm)
	return cbs->cb_imm(cbs->private_data, insn, full_imm);

	snprintf(buff, len, "0x%llx", (unsigned long long)full_imm);
	return buff;
	}

	const char *func_id_name(int id)
	{
	if (id >= 0 && id < __BPF_FUNC_MAX_ID && func_id_str[id])
	return func_id_str[id];
	else
	return "unknown";
	}

	const char *const bpf_class_string[8] = {
	[BPF_LD] = "ld",
	[BPF_LDX] = "ldx",
	[BPF_ST] = "st",
	[BPF_STX] = "stx",
	[BPF_ALU] = "alu",
	[BPF_JMP] = "jmp",
	[BPF_JMP32] = "jmp32",
	[BPF_ALU64] = "alu64",
	};

	const char *const bpf_alu_string[16] = {
	[BPF_ADD >> 4] = "+=",
	[BPF_SUB >> 4] = "-=",
	[BPF_MUL >> 4] = "*=",
	[BPF_DIV >> 4] = "/=",
	[BPF_OR >> 4] = "\|=",
	[BPF_AND >> 4] = "&=",
	[BPF_LSH >> 4] = "<<=",
	[BPF_RSH >> 4] = ">>=",
	[BPF_NEG >> 4] = "neg",
	[BPF_MOD >> 4] = "%=",
	[BPF_XOR >> 4] = "^=",
	[BPF_MOV >> 4] = "=",
	[BPF_ARSH >> 4] = "s>>=",
	[BPF_END >> 4] = "endian",
	};

	static const char *const bpf_alu_sign_string[16] = {
	[BPF_DIV >> 4] = "s/=",
	[BPF_MOD >> 4] = "s%=",
	};

	static const char *const bpf_movsx_string[4] = {
	[0] = "(s8)",
	[1] = "(s16)",
	[3] = "(s32)",
	};

	static const char *const bpf_atomic_alu_string[16] = {
	[BPF_ADD >> 4] = "add",
	[BPF_AND >> 4] = "and",
	[BPF_OR >> 4] = "or",
	[BPF_XOR >> 4] = "xor",
	};

	static const char *const bpf_ldst_string[] = {
	[BPF_W >> 3] = "u32",
	[BPF_H >> 3] = "u16",
	[BPF_B >> 3] = "u8",
	[BPF_DW >> 3] = "u64",
	};

	static const char *const bpf_ldsx_string[] = {
	[BPF_W >> 3] = "s32",
	[BPF_H >> 3] = "s16",
	[BPF_B >> 3] = "s8",
	};

	static const char *const bpf_jmp_string[16] = {
	[BPF_JA >> 4] = "jmp",
	[BPF_JEQ >> 4] = "==",
	[BPF_JGT >> 4] = ">",
	[BPF_JLT >> 4] = "<",
	[BPF_JGE >> 4] = ">=",
	[BPF_JLE >> 4] = "<=",
	[BPF_JSET >> 4] = "&",
	[BPF_JNE >> 4] = "!=",
	[BPF_JSGT >> 4] = "s>",
	[BPF_JSLT >> 4] = "s<",
	[BPF_JSGE >> 4] = "s>=",
	[BPF_JSLE >> 4] = "s<=",
	[BPF_CALL >> 4] = "call",
	[BPF_EXIT >> 4] = "exit",
	};

	static void print_bpf_end_insn(bpf_insn_print_t verbose,
	void *private_data,
	const struct bpf_insn *insn)
	{
	verbose(private_data, "(%02x) r%d = %s%d r%d\n",
	insn->code, insn->dst_reg,
	BPF_SRC(insn->code) == BPF_TO_BE ? "be" : "le",
	insn->imm, insn->dst_reg);
	}

	static void print_bpf_bswap_insn(bpf_insn_print_t verbose,
	void *private_data,
	const struct bpf_insn *insn)
	{
	verbose(private_data, "(%02x) r%d = bswap%d r%d\n",
	insn->code, insn->dst_reg,
	insn->imm, insn->dst_reg);
	}

	static bool is_sdiv_smod(const struct bpf_insn *insn)
	{
	return (BPF_OP(insn->code) == BPF_DIV \|\| BPF_OP(insn->code) == BPF_MOD) &&
	insn->off == 1;
	}

	static bool is_movsx(const struct bpf_insn *insn)
	{
	return BPF_OP(insn->code) == BPF_MOV &&
	(insn->off == 8 \|\| insn->off == 16 \|\| insn->off == 32);
	}

	static bool is_addr_space_cast(const struct bpf_insn *insn)
	{
	return insn->code == (BPF_ALU64 \| BPF_MOV \| BPF_X) &&
	insn->off == BPF_ADDR_SPACE_CAST;
	}

	void print_bpf_insn(const struct bpf_insn_cbs *cbs,
	const struct bpf_insn *insn,
	bool allow_ptr_leaks)
	{
	const bpf_insn_print_t verbose = cbs->cb_print;
	u8 class = BPF_CLASS(insn->code);

	if (class == BPF_ALU \|\| class == BPF_ALU64) {
	if (BPF_OP(insn->code) == BPF_END) {
	if (class == BPF_ALU64)
	print_bpf_bswap_insn(verbose, cbs->private_data, insn);
	else
	print_bpf_end_insn(verbose, cbs->private_data, insn);
	} else if (BPF_OP(insn->code) == BPF_NEG) {
	verbose(cbs->private_data, "(%02x) %c%d = -%c%d\n",
	insn->code, class == BPF_ALU ? 'w' : 'r',
	insn->dst_reg, class == BPF_ALU ? 'w' : 'r',
	insn->dst_reg);
	} else if (is_addr_space_cast(insn)) {
	verbose(cbs->private_data, "(%02x) r%d = addr_space_cast(r%d, %d, %d)\n",
	insn->code, insn->dst_reg,
	insn->src_reg, ((u32)insn->imm) >> 16, (u16)insn->imm);
	} else if (BPF_SRC(insn->code) == BPF_X) {
	verbose(cbs->private_data, "(%02x) %c%d %s %s%c%d\n",
	insn->code, class == BPF_ALU ? 'w' : 'r',
	insn->dst_reg,
	is_sdiv_smod(insn) ? bpf_alu_sign_string[BPF_OP(insn->code) >> 4]
	: bpf_alu_string[BPF_OP(insn->code) >> 4],
	is_movsx(insn) ? bpf_movsx_string[(insn->off >> 3) - 1] : "",
	class == BPF_ALU ? 'w' : 'r',
	insn->src_reg);
	} else {
	verbose(cbs->private_data, "(%02x) %c%d %s %d\n",
	insn->code, class == BPF_ALU ? 'w' : 'r',
	insn->dst_reg,
	is_sdiv_smod(insn) ? bpf_alu_sign_string[BPF_OP(insn->code) >> 4]
	: bpf_alu_string[BPF_OP(insn->code) >> 4],
	insn->imm);
	}
	} else if (class == BPF_STX) {
	if (BPF_MODE(insn->code) == BPF_MEM)
	verbose(cbs->private_data, "(%02x) (%s )(r%d %+d) = r%d\n",
	insn->code,
	bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
	insn->dst_reg,
	insn->off, insn->src_reg);
	else if (BPF_MODE(insn->code) == BPF_ATOMIC &&
	(insn->imm == BPF_ADD \|\| insn->imm == BPF_AND \|\|
	insn->imm == BPF_OR \|\| insn->imm == BPF_XOR)) {
	verbose(cbs->private_data, "(%02x) lock (%s )(r%d %+d) %s r%d\n",
	insn->code,
	bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
	insn->dst_reg, insn->off,
	bpf_alu_string[BPF_OP(insn->imm) >> 4],
	insn->src_reg);
	} else if (BPF_MODE(insn->code) == BPF_ATOMIC &&
	(insn->imm == (BPF_ADD \| BPF_FETCH) \|\|
	insn->imm == (BPF_AND \| BPF_FETCH) \|\|
	insn->imm == (BPF_OR \| BPF_FETCH) \|\|
	insn->imm == (BPF_XOR \| BPF_FETCH))) {
	verbose(cbs->private_data, "(%02x) r%d = atomic%s_fetch_%s((%s *)(r%d %+d), r%d)\n",
	insn->code, insn->src_reg,
	BPF_SIZE(insn->code) == BPF_DW ? "64" : "",
	bpf_atomic_alu_string[BPF_OP(insn->imm) >> 4],
	bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
	insn->dst_reg, insn->off, insn->src_reg);
	} else if (BPF_MODE(insn->code) == BPF_ATOMIC &&
	insn->imm == BPF_CMPXCHG) {
	verbose(cbs->private_data, "(%02x) r0 = atomic%s_cmpxchg((%s *)(r%d %+d), r0, r%d)\n",
	insn->code,
	BPF_SIZE(insn->code) == BPF_DW ? "64" : "",
	bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
	insn->dst_reg, insn->off,
	insn->src_reg);
	} else if (BPF_MODE(insn->code) == BPF_ATOMIC &&
	insn->imm == BPF_XCHG) {
	verbose(cbs->private_data, "(%02x) r%d = atomic%s_xchg((%s *)(r%d %+d), r%d)\n",
	insn->code, insn->src_reg,
	BPF_SIZE(insn->code) == BPF_DW ? "64" : "",
	bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
	insn->dst_reg, insn->off, insn->src_reg);
	} else {
	verbose(cbs->private_data, "BUG_%02x\n", insn->code);
	}
	} else if (class == BPF_ST) {
	if (BPF_MODE(insn->code) == BPF_MEM) {
	verbose(cbs->private_data, "(%02x) (%s )(r%d %+d) = %d\n",
	insn->code,
	bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
	insn->dst_reg,
	insn->off, insn->imm);
	} else if (BPF_MODE(insn->code) == 0xc0 /* BPF_NOSPEC, no UAPI */) {
	verbose(cbs->private_data, "(%02x) nospec\n", insn->code);
	} else {
	verbose(cbs->private_data, "BUG_st_%02x\n", insn->code);
	}
	} else if (class == BPF_LDX) {
	if (BPF_MODE(insn->code) != BPF_MEM && BPF_MODE(insn->code) != BPF_MEMSX) {
	verbose(cbs->private_data, "BUG_ldx_%02x\n", insn->code);
	return;
	}
	verbose(cbs->private_data, "(%02x) r%d = (%s )(r%d %+d)\n",
	insn->code, insn->dst_reg,
	BPF_MODE(insn->code) == BPF_MEM ?
	bpf_ldst_string[BPF_SIZE(insn->code) >> 3] :
	bpf_ldsx_string[BPF_SIZE(insn->code) >> 3],
	insn->src_reg, insn->off);
	} else if (class == BPF_LD) {
	if (BPF_MODE(insn->code) == BPF_ABS) {
	verbose(cbs->private_data, "(%02x) r0 = (%s )skb[%d]\n",
	insn->code,
	bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
	insn->imm);
	} else if (BPF_MODE(insn->code) == BPF_IND) {
	verbose(cbs->private_data, "(%02x) r0 = (%s )skb[r%d + %d]\n",
	insn->code,
	bpf_ldst_string[BPF_SIZE(insn->code) >> 3],
	insn->src_reg, insn->imm);
	} else if (BPF_MODE(insn->code) == BPF_IMM &&
	BPF_SIZE(insn->code) == BPF_DW) {
	/* At this point, we already made sure that the second
	* part of the ldimm64 insn is accessible.
	*/
	u64 imm = ((u64)(insn + 1)->imm << 32) \| (u32)insn->imm;
	bool is_ptr = insn->src_reg == BPF_PSEUDO_MAP_FD \|\|
	insn->src_reg == BPF_PSEUDO_MAP_VALUE;
	char tmp[64];

	if (is_ptr && !allow_ptr_leaks)
	imm = 0;

	verbose(cbs->private_data, "(%02x) r%d = %s\n",
	insn->code, insn->dst_reg,
	__func_imm_name(cbs, insn, imm,
	tmp, sizeof(tmp)));
	} else {
	verbose(cbs->private_data, "BUG_ld_%02x\n", insn->code);
	return;
	}
	} else if (class == BPF_JMP32 \|\| class == BPF_JMP) {
	u8 opcode = BPF_OP(insn->code);

	if (opcode == BPF_CALL) {
	char tmp[64];

	if (insn->src_reg == BPF_PSEUDO_CALL) {
	verbose(cbs->private_data, "(%02x) call pc%s\n",
	insn->code,
	__func_get_name(cbs, insn,
	tmp, sizeof(tmp)));
	} else {
	strcpy(tmp, "unknown");
	verbose(cbs->private_data, "(%02x) call %s#%d\n", insn->code,
	__func_get_name(cbs, insn,
	tmp, sizeof(tmp)),
	insn->imm);
	}
	} else if (insn->code == (BPF_JMP \| BPF_JA)) {
	verbose(cbs->private_data, "(%02x) goto pc%+d\n",
	insn->code, insn->off);
	} else if (insn->code == (BPF_JMP \| BPF_JCOND) &&
	insn->src_reg == BPF_MAY_GOTO) {
	verbose(cbs->private_data, "(%02x) may_goto pc%+d\n",
	insn->code, insn->off);
	} else if (insn->code == (BPF_JMP32 \| BPF_JA)) {
	verbose(cbs->private_data, "(%02x) gotol pc%+d\n",
	insn->code, insn->imm);
	} else if (insn->code == (BPF_JMP \| BPF_EXIT)) {
	verbose(cbs->private_data, "(%02x) exit\n", insn->code);
	} else if (BPF_SRC(insn->code) == BPF_X) {
	verbose(cbs->private_data,
	"(%02x) if %c%d %s %c%d goto pc%+d\n",
	insn->code, class == BPF_JMP32 ? 'w' : 'r',
	insn->dst_reg,
	bpf_jmp_string[BPF_OP(insn->code) >> 4],
	class == BPF_JMP32 ? 'w' : 'r',
	insn->src_reg, insn->off);
	} else {
	verbose(cbs->private_data,
	"(%02x) if %c%d %s 0x%x goto pc%+d\n",
	insn->code, class == BPF_JMP32 ? 'w' : 'r',
	insn->dst_reg,
	bpf_jmp_string[BPF_OP(insn->code) >> 4],
	insn->imm, insn->off);
	}
	} else {
	verbose(cbs->private_data, "(%02x) %s\n",
	insn->code, bpf_class_string[class]);
	}
	}