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96 lines
2.3 KiB
96 lines
2.3 KiB
/*
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* Load, verify and execute ClamAV bytecode.
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*
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* Copyright (C) 2009 Sourcefire, Inc.
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*
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* Authors: Török Edvin
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef BYTECODE_PRIV_H
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#define BYTECODE_PRIV_H
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typedef uint32_t operand_t;
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typedef uint16_t bbid_t;
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typedef uint16_t funcid_t;
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struct cli_bc_callop {
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operand_t* ops;
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uint8_t numOps;
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funcid_t funcid;
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};
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struct branch {
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operand_t condition;
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bbid_t br_true;
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bbid_t br_false;
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};
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#define MAX_OP (operand_t)(~0u)
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#define CONSTANT_OP (MAX_OP-1)
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#define ARG_OP (MAX_OP-1)
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struct cli_bc_value {
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uint64_t v;
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operand_t ref;/* this has CONSTANT_OP value for constants, and ARG_op for arguments */
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};
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struct cli_bc_cast {
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operand_t source;
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uint64_t mask;
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};
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struct cli_bc_inst {
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enum bc_opcode opcode;
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uint16_t type;
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union {
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operand_t unaryop;
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struct cli_bc_cast cast;
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operand_t binop[2];
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operand_t three[3];
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struct cli_bc_callop ops;
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struct branch branch;
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bbid_t jump;
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} u;
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};
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struct cli_bc_bb {
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unsigned numInsts;
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struct cli_bc_inst *insts;
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};
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struct cli_bc_func {
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uint8_t numArgs;
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uint16_t numLocals;
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uint32_t numInsts;
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uint32_t numConstants;
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uint16_t numBB;
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uint16_t *types;
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uint32_t insn_idx;
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struct cli_bc_bb *BB;
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struct cli_bc_inst *allinsts;
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struct cli_bc_value *values;
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};
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struct cli_bc_ctx {
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/* id and params of toplevel function called */
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struct cli_bc *bc;
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struct cli_bc_func *func;
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struct cli_bc_value *values;
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operand_t *operands;
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uint16_t funcid;
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unsigned numParams;
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};
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int cli_vm_execute(struct cli_bc *bc, struct cli_bc_ctx *ctx, struct cli_bc_func *func, struct cli_bc_inst *inst, struct cli_bc_value *value);
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#endif
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