-/*
+/* SPDX-License-Identifier: MIT
+ *
* lttng-filter-validator.c
*
* LTTng modules filter bytecode validator.
*
* Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
*/
#include <linux/types.h>
}
case FILTER_OP_RETURN:
+ case FILTER_OP_RETURN_S64:
{
if (unlikely(pc + sizeof(struct return_op)
> start_pc + bytecode->len)) {
case FILTER_OP_MOD:
case FILTER_OP_PLUS:
case FILTER_OP_MINUS:
- case FILTER_OP_RSHIFT:
- case FILTER_OP_LSHIFT:
case FILTER_OP_EQ_DOUBLE:
case FILTER_OP_NE_DOUBLE:
case FILTER_OP_GT_DOUBLE:
case FILTER_OP_LT_S64:
case FILTER_OP_GE_S64:
case FILTER_OP_LE_S64:
+ case FILTER_OP_BIT_RSHIFT:
+ case FILTER_OP_BIT_LSHIFT:
case FILTER_OP_BIT_AND:
case FILTER_OP_BIT_OR:
case FILTER_OP_BIT_XOR:
case FILTER_OP_UNARY_PLUS_S64:
case FILTER_OP_UNARY_MINUS_S64:
case FILTER_OP_UNARY_NOT_S64:
+ case FILTER_OP_UNARY_BIT_NOT:
{
if (unlikely(pc + sizeof(struct unary_op)
> start_pc + bytecode->len)) {
if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_symbol)
> start_pc + bytecode->len)) {
ret = -ERANGE;
+ break;
}
ret = validate_get_symbol(bytecode, sym);
break;
}
case FILTER_OP_RETURN:
+ case FILTER_OP_RETURN_S64:
{
goto end;
}
case FILTER_OP_MOD:
case FILTER_OP_PLUS:
case FILTER_OP_MINUS:
- case FILTER_OP_RSHIFT:
- case FILTER_OP_LSHIFT:
/* Floating point */
case FILTER_OP_EQ_DOUBLE:
case FILTER_OP_NE_DOUBLE:
break;
}
+ case FILTER_OP_BIT_RSHIFT:
+ ret = bin_op_bitwise_check(stack, opcode, ">>");
+ if (ret < 0)
+ goto end;
+ break;
+ case FILTER_OP_BIT_LSHIFT:
+ ret = bin_op_bitwise_check(stack, opcode, "<<");
+ if (ret < 0)
+ goto end;
+ break;
case FILTER_OP_BIT_AND:
ret = bin_op_bitwise_check(stack, opcode, "&");
if (ret < 0)
}
break;
}
+ case FILTER_OP_UNARY_BIT_NOT:
+ {
+ if (!vstack_ax(stack)) {
+ printk(KERN_WARNING "Empty stack\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ switch (vstack_ax(stack)->type) {
+ default:
+ printk(KERN_WARNING "unknown register type\n");
+ ret = -EINVAL;
+ goto end;
+
+ case REG_STRING:
+ case REG_STAR_GLOB_STRING:
+ case REG_DOUBLE:
+ printk(KERN_WARNING "Unary bitwise op can only be applied to numeric registers\n");
+ ret = -EINVAL;
+ goto end;
+ case REG_S64:
+ break;
+ case REG_TYPE_UNKNOWN:
+ break;
+ }
+ break;
+ }
case FILTER_OP_UNARY_PLUS_S64:
case FILTER_OP_UNARY_MINUS_S64:
goto end;
}
+ case FILTER_OP_RETURN_S64:
+ {
+ if (!vstack_ax(stack)) {
+ printk(KERN_WARNING "Empty stack\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ switch (vstack_ax(stack)->type) {
+ case REG_S64:
+ break;
+ default:
+ case REG_TYPE_UNKNOWN:
+ printk(KERN_WARNING "Unexpected register type %d at end of bytecode\n",
+ (int) vstack_ax(stack)->type);
+ ret = -EINVAL;
+ goto end;
+ }
+
+ ret = 0;
+ goto end;
+ }
+
/* binary */
case FILTER_OP_MUL:
case FILTER_OP_DIV:
case FILTER_OP_MOD:
case FILTER_OP_PLUS:
case FILTER_OP_MINUS:
- case FILTER_OP_RSHIFT:
- case FILTER_OP_LSHIFT:
/* Floating point */
case FILTER_OP_EQ_DOUBLE:
case FILTER_OP_NE_DOUBLE:
case FILTER_OP_LT_S64:
case FILTER_OP_GE_S64:
case FILTER_OP_LE_S64:
+ case FILTER_OP_BIT_RSHIFT:
+ case FILTER_OP_BIT_LSHIFT:
case FILTER_OP_BIT_AND:
case FILTER_OP_BIT_OR:
case FILTER_OP_BIT_XOR:
break;
}
+ case FILTER_OP_UNARY_BIT_NOT:
+ {
+ /* Pop 1, push 1 */
+ if (!vstack_ax(stack)) {
+ printk(KERN_WARNING "Empty stack\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ switch (vstack_ax(stack)->type) {
+ case REG_S64:
+ case REG_TYPE_UNKNOWN:
+ break;
+ case REG_DOUBLE:
+ default:
+ printk(KERN_WARNING "Unexpected register type %d for operation\n",
+ (int) vstack_ax(stack)->type);
+ ret = -EINVAL;
+ goto end;
+ }
+
+ vstack_ax(stack)->type = REG_S64;
+ next_pc += sizeof(struct unary_op);
+ break;
+ }
+
/* logical */
case FILTER_OP_AND:
case FILTER_OP_OR:
projects / lttng-modules.git / blobdiff