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/*
* Copyright 2016 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef WASM_BINARY_READER_H_
#define WASM_BINARY_READER_H_
#include <stddef.h>
#include <stdint.h>
#include "binary.h"
#include "common.h"
struct WasmAllocator;
#define WASM_READ_BINARY_OPTIONS_DEFAULT \
{ NULL, WASM_FALSE }
typedef struct WasmReadBinaryOptions {
struct WasmStream* log_stream;
WasmBool read_debug_names;
} WasmReadBinaryOptions;
typedef struct WasmBinaryReaderContext {
const uint8_t* data;
size_t size;
size_t offset;
void* user_data;
} WasmBinaryReaderContext;
typedef struct WasmBinaryReader {
void* user_data;
void (*on_error)(WasmBinaryReaderContext* ctx, const char* message);
/* module */
WasmResult (*begin_module)(uint32_t version, void* user_data);
WasmResult (*end_module)(void* user_data);
WasmResult (*begin_section)(WasmBinaryReaderContext* ctx,
WasmBinarySection section_type,
uint32_t size);
/* custom section */
WasmResult (*begin_custom_section)(WasmBinaryReaderContext* ctx,
uint32_t size,
WasmStringSlice section_name);
WasmResult (*end_custom_section)(WasmBinaryReaderContext* ctx);
/* signatures section */
/* TODO(binji): rename to "type" section */
WasmResult (*begin_signature_section)(WasmBinaryReaderContext* ctx,
uint32_t size);
WasmResult (*on_signature_count)(uint32_t count, void* user_data);
WasmResult (*on_signature)(uint32_t index,
uint32_t param_count,
WasmType* param_types,
uint32_t result_count,
WasmType* result_types,
void* user_data);
WasmResult (*end_signature_section)(WasmBinaryReaderContext* ctx);
/* import section */
WasmResult (*begin_import_section)(WasmBinaryReaderContext* ctx,
uint32_t size);
WasmResult (*on_import_count)(uint32_t count, void* user_data);
WasmResult (*on_import)(uint32_t index,
WasmStringSlice module_name,
WasmStringSlice field_name,
void* user_data);
WasmResult (*on_import_func)(uint32_t import_index,
uint32_t func_index,
uint32_t sig_index,
void* user_data);
WasmResult (*on_import_table)(uint32_t import_index,
uint32_t table_index,
WasmType elem_type,
const WasmLimits* elem_limits,
void* user_data);
WasmResult (*on_import_memory)(uint32_t import_index,
uint32_t memory_index,
const WasmLimits* page_limits,
void* user_data);
WasmResult (*on_import_global)(uint32_t import_index,
uint32_t global_index,
WasmType type,
WasmBool mutable_,
void* user_data);
WasmResult (*end_import_section)(WasmBinaryReaderContext* ctx);
/* function signatures section */
/* TODO(binji): rename to "function" section */
WasmResult (*begin_function_signatures_section)(WasmBinaryReaderContext* ctx,
uint32_t size);
WasmResult (*on_function_signatures_count)(uint32_t count, void* user_data);
WasmResult (*on_function_signature)(uint32_t index,
uint32_t sig_index,
void* user_data);
WasmResult (*end_function_signatures_section)(WasmBinaryReaderContext* ctx);
/* table section */
WasmResult (*begin_table_section)(WasmBinaryReaderContext* ctx,
uint32_t size);
WasmResult (*on_table_count)(uint32_t count, void* user_data);
WasmResult (*on_table)(uint32_t index,
WasmType elem_type,
const WasmLimits* elem_limits,
void* user_data);
WasmResult (*end_table_section)(WasmBinaryReaderContext* ctx);
/* memory section */
WasmResult (*begin_memory_section)(WasmBinaryReaderContext* ctx,
uint32_t size);
WasmResult (*on_memory_count)(uint32_t count, void* user_data);
WasmResult (*on_memory)(uint32_t index,
const WasmLimits* limits,
void* user_data);
WasmResult (*end_memory_section)(WasmBinaryReaderContext* ctx);
/* global section */
WasmResult (*begin_global_section)(WasmBinaryReaderContext* ctx,
uint32_t size);
WasmResult (*on_global_count)(uint32_t count, void* user_data);
WasmResult (*begin_global)(uint32_t index,
WasmType type,
WasmBool mutable_,
void* user_data);
WasmResult (*begin_global_init_expr)(uint32_t index, void* user_data);
WasmResult (*end_global_init_expr)(uint32_t index, void* user_data);
WasmResult (*end_global)(uint32_t index, void* user_data);
WasmResult (*end_global_section)(WasmBinaryReaderContext* ctx);
/* exports section */
WasmResult (*begin_export_section)(WasmBinaryReaderContext* ctx,
uint32_t size);
WasmResult (*on_export_count)(uint32_t count, void* user_data);
WasmResult (*on_export)(uint32_t index,
WasmExternalKind kind,
uint32_t item_index,
WasmStringSlice name,
void* user_data);
WasmResult (*end_export_section)(WasmBinaryReaderContext* ctx);
/* start section */
WasmResult (*begin_start_section)(WasmBinaryReaderContext* ctx,
uint32_t size);
WasmResult (*on_start_function)(uint32_t func_index, void* user_data);
WasmResult (*end_start_section)(WasmBinaryReaderContext* ctx);
/* function bodies section */
/* TODO(binji): rename to code section */
WasmResult (*begin_function_bodies_section)(WasmBinaryReaderContext* ctx,
uint32_t size);
WasmResult (*on_function_bodies_count)(uint32_t count, void* user_data);
WasmResult (*begin_function_body_pass)(uint32_t index,
uint32_t pass,
void* user_data);
WasmResult (*begin_function_body)(uint32_t index, void* user_data);
WasmResult (*on_local_decl_count)(uint32_t count, void* user_data);
WasmResult (*on_local_decl)(uint32_t decl_index,
uint32_t count,
WasmType type,
void* user_data);
/* function expressions; called between begin_function_body and
end_function_body */
WasmResult (*on_opcode)(WasmBinaryReaderContext* ctx, WasmOpcode Opcode);
WasmResult (*on_opcode_bare)(WasmBinaryReaderContext* ctx);
WasmResult (*on_opcode_uint32)(WasmBinaryReaderContext* ctx, uint32_t value);
WasmResult (*on_opcode_uint32_uint32)(WasmBinaryReaderContext* ctx,
uint32_t value,
uint32_t value2);
WasmResult (*on_opcode_uint64)(WasmBinaryReaderContext* ctx, uint64_t value);
WasmResult (*on_opcode_f32)(WasmBinaryReaderContext* ctx, uint32_t value);
WasmResult (*on_opcode_f64)(WasmBinaryReaderContext* ctx, uint64_t value);
WasmResult (*on_opcode_block_sig)(WasmBinaryReaderContext* ctx,
uint32_t num_types,
WasmType* sig_types);
WasmResult (*on_binary_expr)(WasmOpcode opcode, void* user_data);
WasmResult (*on_block_expr)(uint32_t num_types,
WasmType* sig_types,
void* user_data);
WasmResult (*on_br_expr)(uint32_t depth, void* user_data);
WasmResult (*on_br_if_expr)(uint32_t depth, void* user_data);
WasmResult (*on_br_table_expr)(WasmBinaryReaderContext* ctx,
uint32_t num_targets,
uint32_t* target_depths,
uint32_t default_target_depth);
WasmResult (*on_call_expr)(uint32_t func_index, void* user_data);
WasmResult (*on_call_import_expr)(uint32_t import_index, void* user_data);
WasmResult (*on_call_indirect_expr)(uint32_t sig_index, void* user_data);
WasmResult (*on_compare_expr)(WasmOpcode opcode, void* user_data);
WasmResult (*on_convert_expr)(WasmOpcode opcode, void* user_data);
WasmResult (*on_drop_expr)(void* user_data);
WasmResult (*on_else_expr)(void* user_data);
WasmResult (*on_end_expr)(void* user_data);
WasmResult (*on_f32_const_expr)(uint32_t value_bits, void* user_data);
WasmResult (*on_f64_const_expr)(uint64_t value_bits, void* user_data);
WasmResult (*on_get_global_expr)(uint32_t global_index, void* user_data);
WasmResult (*on_get_local_expr)(uint32_t local_index, void* user_data);
WasmResult (*on_grow_memory_expr)(void* user_data);
WasmResult (*on_i32_const_expr)(uint32_t value, void* user_data);
WasmResult (*on_i64_const_expr)(uint64_t value, void* user_data);
WasmResult (*on_if_expr)(uint32_t num_types,
WasmType* sig_types,
void* user_data);
WasmResult (*on_load_expr)(WasmOpcode opcode,
uint32_t alignment_log2,
uint32_t offset,
void* user_data);
WasmResult (*on_loop_expr)(uint32_t num_types,
WasmType* sig_types,
void* user_data);
WasmResult (*on_current_memory_expr)(void* user_data);
WasmResult (*on_nop_expr)(void* user_data);
WasmResult (*on_return_expr)(void* user_data);
WasmResult (*on_select_expr)(void* user_data);
WasmResult (*on_set_global_expr)(uint32_t global_index, void* user_data);
WasmResult (*on_set_local_expr)(uint32_t local_index, void* user_data);
WasmResult (*on_store_expr)(WasmOpcode opcode,
uint32_t alignment_log2,
uint32_t offset,
void* user_data);
WasmResult (*on_tee_local_expr)(uint32_t local_index, void* user_data);
WasmResult (*on_unary_expr)(WasmOpcode opcode, void* user_data);
WasmResult (*on_unreachable_expr)(void* user_data);
WasmResult (*end_function_body)(uint32_t index, void* user_data);
WasmResult (*end_function_body_pass)(uint32_t index,
uint32_t pass,
void* user_data);
WasmResult (*end_function_bodies_section)(WasmBinaryReaderContext* ctx);
/* elem section */
WasmResult (*begin_elem_section)(WasmBinaryReaderContext* ctx, uint32_t size);
WasmResult (*on_elem_segment_count)(uint32_t count, void* user_data);
WasmResult (*begin_elem_segment)(uint32_t index,
uint32_t table_index,
void* user_data);
WasmResult (*begin_elem_segment_init_expr)(uint32_t index, void* user_data);
WasmResult (*end_elem_segment_init_expr)(uint32_t index, void* user_data);
WasmResult (*on_elem_segment_function_index_count)(
WasmBinaryReaderContext* ctx,
uint32_t index,
uint32_t count);
WasmResult (*on_elem_segment_function_index)(uint32_t index,
uint32_t func_index,
void* user_data);
WasmResult (*end_elem_segment)(uint32_t index, void* user_data);
WasmResult (*end_elem_section)(WasmBinaryReaderContext* ctx);
/* data section */
WasmResult (*begin_data_section)(WasmBinaryReaderContext* ctx, uint32_t size);
WasmResult (*on_data_segment_count)(uint32_t count, void* user_data);
WasmResult (*begin_data_segment)(uint32_t index,
uint32_t memory_index,
void* user_data);
WasmResult (*begin_data_segment_init_expr)(uint32_t index, void* user_data);
WasmResult (*end_data_segment_init_expr)(uint32_t index, void* user_data);
WasmResult (*on_data_segment_data)(uint32_t index,
const void* data,
uint32_t size,
void* user_data);
WasmResult (*end_data_segment)(uint32_t index, void* user_data);
WasmResult (*end_data_section)(WasmBinaryReaderContext* ctx);
/* names section */
WasmResult (*begin_names_section)(WasmBinaryReaderContext* ctx,
uint32_t size);
WasmResult (*on_function_names_count)(uint32_t count, void* user_data);
WasmResult (*on_function_name)(uint32_t index,
WasmStringSlice name,
void* user_data);
WasmResult (*on_local_names_count)(uint32_t index,
uint32_t count,
void* user_data);
WasmResult (*on_local_name)(uint32_t func_index,
uint32_t local_index,
WasmStringSlice name,
void* user_data);
WasmResult (*end_names_section)(WasmBinaryReaderContext* ctx);
/* names section */
WasmResult (*begin_reloc_section)(WasmBinaryReaderContext* ctx,
uint32_t size);
WasmResult (*on_reloc_count)(uint32_t count, void* user_data);
WasmResult (*on_reloc)(WasmRelocType type,
uint32_t section_index,
uint32_t offset,
void* user_data);
WasmResult (*end_reloc_section)(WasmBinaryReaderContext* ctx);
/* init_expr - used by elem, data and global sections; these functions are
* only called between calls to begin_*_init_expr and end_*_init_expr */
WasmResult (*on_init_expr_f32_const_expr)(uint32_t index,
uint32_t value,
void* user_data);
WasmResult (*on_init_expr_f64_const_expr)(uint32_t index,
uint64_t value,
void* user_data);
WasmResult (*on_init_expr_get_global_expr)(uint32_t index,
uint32_t global_index,
void* user_data);
WasmResult (*on_init_expr_i32_const_expr)(uint32_t index,
uint32_t value,
void* user_data);
WasmResult (*on_init_expr_i64_const_expr)(uint32_t index,
uint64_t value,
void* user_data);
} WasmBinaryReader;
WASM_EXTERN_C_BEGIN
WasmResult wasm_read_binary(struct WasmAllocator* allocator,
const void* data,
size_t size,
WasmBinaryReader* reader,
uint32_t num_function_passes,
const WasmReadBinaryOptions* options);
size_t wasm_read_u32_leb128(const uint8_t* ptr,
const uint8_t* end,
uint32_t* out_value);
size_t wasm_read_i32_leb128(const uint8_t* ptr,
const uint8_t* end,
uint32_t* out_value);
WASM_EXTERN_C_END
#endif /* WASM_BINARY_READER_H_ */
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