fix endianness
This commit is contained in:
parent
807527310d
commit
7a003fc89f
105
classfile.c
105
classfile.c
@ -1,4 +1,5 @@
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#include "classfile.h"
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#include "classfile.h"
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#include <assert.h>
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#include <memory.h>
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#include <memory.h>
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#include <stddef.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdio.h>
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@ -19,7 +20,7 @@ void read_u2(void *ptr, size_t n, FILE *file) {
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void read_u4(void *ptr, size_t n, FILE *file) {
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void read_u4(void *ptr, size_t n, FILE *file) {
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u4 buffer[n];
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u4 buffer[n];
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fread(&buffer, sizeof(u2), n, file);
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fread(&buffer, sizeof(u4), n, file);
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#ifdef SWAP_ENDIANNESS
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#ifdef SWAP_ENDIANNESS
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for (size_t i = 0; i < n; i++) {
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for (size_t i = 0; i < n; i++) {
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buffer[i] = ((buffer[i] >> 24) & 0xff) | // move byte 3 to byte 0
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buffer[i] = ((buffer[i] >> 24) & 0xff) | // move byte 3 to byte 0
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@ -40,96 +41,125 @@ ClassFile *ClassFile_load(const char *path) {
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// magic 4bytes, minor_version 2bytes, major_version 2bytes,
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// magic 4bytes, minor_version 2bytes, major_version 2bytes,
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// constant_pool_count 2bytes
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// constant_pool_count 2bytes
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fread(&(cf->magic), 4 + 2 + 2 + 2, 1, file);
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read_u4(&(cf->magic), 1, file);
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read_u2(&(cf->minor_version), 3, file);
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// constant_pool
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// constant_pool
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cf->constant_pool =
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cf->constant_pool =
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(cp_info *)malloc(sizeof(cp_info) * (cf->constant_pool_count - 1));
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(cp_info *)malloc(sizeof(cp_info) * (cf->constant_pool_count - 1));
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for (u2 i = 0; i < (cf->constant_pool_count - 1); i++) {
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for (u2 i = 0; i < (cf->constant_pool_count - 1); i++) {
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// cp_info.tag 2bytes
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// cp_info.tag 2bytes
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fread(&(cf->constant_pool[i].tag), 2, 1, file);
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fread(&(cf->constant_pool[i].tag), 1, 1, file);
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size_t size;
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size_t size;
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switch (cf->constant_pool[i].tag) {
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switch (cf->constant_pool[i].tag) {
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case CONSTANT_Class:
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case CONSTANT_Class:
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size = sizeof(CONSTANT_Class_info);
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read_u2(&(cf->constant_pool[i].info.class_info.name_index), 1, file);
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break;
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break;
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case CONSTANT_Fieldref:
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case CONSTANT_Fieldref:
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size = sizeof(CONSTANT_Fieldref_info);
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read_u2(&(cf->constant_pool[i].info.fieldref_info.class_index), 1, file);
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read_u2(&(cf->constant_pool[i].info.fieldref_info.name_and_type_index), 1,
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file);
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break;
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break;
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case CONSTANT_Methodref:
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case CONSTANT_Methodref:
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size = sizeof(CONSTANT_Methodref_info);
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read_u2(&(cf->constant_pool[i].info.methodref_info.class_index), 1, file);
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read_u2(&(cf->constant_pool[i].info.methodref_info.name_and_type_index),
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1, file);
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break;
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break;
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case CONSTANT_InterfaceMethodref:
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case CONSTANT_InterfaceMethodref:
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size = sizeof(CONSTANT_InterfaceMethodref_info);
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read_u2(&(cf->constant_pool[i].info.interface_methodred_info.class_index),
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1, file);
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read_u2(&(cf->constant_pool[i]
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.info.interface_methodred_info.name_and_type_index),
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1, file);
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break;
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break;
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case CONSTANT_String:
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case CONSTANT_String:
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size = sizeof(CONSTANT_String_info);
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read_u2(&(cf->constant_pool[i].info.string_info.string_index), 1, file);
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break;
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break;
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case CONSTANT_Integer:
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case CONSTANT_Integer:
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size = sizeof(CONSTANT_Integer_info);
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read_u4(&(cf->constant_pool[i].info.integer_info.bytes), 1, file);
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break;
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break;
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case CONSTANT_Float:
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case CONSTANT_Float:
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size = sizeof(CONSTANT_Float_info);
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read_u4(&(cf->constant_pool[i].info.float_info.bytes), 1, file);
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break;
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break;
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case CONSTANT_Long:
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case CONSTANT_Long:
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size = sizeof(CONSTANT_Long_info);
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read_u4(&(cf->constant_pool[i].info.long_info.high_bytes), 1, file);
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read_u4(&(cf->constant_pool[i].info.long_info.low_bytes), 1, file);
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break;
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break;
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case CONSTANT_Double:
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case CONSTANT_Double:
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size = sizeof(CONSTANT_Double_info);
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read_u4(&(cf->constant_pool[i].info.double_info.high_bytes), 1, file);
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read_u4(&(cf->constant_pool[i].info.double_info.low_bytes), 1, file);
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break;
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break;
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case CONSTANT_NameAndType:
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case CONSTANT_NameAndType:
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size = sizeof(CONSTANT_NameAndType_info);
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read_u2(&(cf->constant_pool[i].info.name_and_type_info.name_index), 1,
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file);
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read_u2(&(cf->constant_pool[i].info.name_and_type_info.descriptor_index),
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1, file);
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break;
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break;
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case CONSTANT_Utf8:
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case CONSTANT_Utf8:
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size = sizeof(CONSTANT_Utf8_info);
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read_u2(&(cf->constant_pool[i].info.utf8_info.length), 1, file);
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fread(&(cf->constant_pool[i].info.utf8_info.bytes),
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cf->constant_pool[i].info.utf8_info.length, 1, file);
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break;
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break;
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case CONSTANT_MethodHandle:
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case CONSTANT_MethodHandle:
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size = sizeof(CONSTANT_MethodHandle_info);
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fread(&(cf->constant_pool[i].info.method_handle_info.reference_kind), 1,
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1, file);
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read_u2(&(cf->constant_pool[i].info.method_handle_info.reference_index),
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1, file);
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break;
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break;
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case CONSTANT_MethodType:
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case CONSTANT_MethodType:
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size = sizeof(CONSTANT_MethodType_info);
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read_u2(&(cf->constant_pool[i].info.method_type_info.descriptor_index), 1,
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file);
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break;
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break;
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case CONSTANT_Dynamic:
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case CONSTANT_Dynamic:
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size = sizeof(CONSTANT_Dynamic_info);
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read_u2(
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&(cf->constant_pool[i].info.dynamic_info.bootstrap_method_attr_index),
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1, file);
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read_u2(&(cf->constant_pool[i].info.dynamic_info.name_and_type_index), 1,
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file);
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break;
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break;
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case CONSTANT_InvokeDynamic:
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case CONSTANT_InvokeDynamic:
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size = sizeof(CONSTANT_InvokeDynamic_info);
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read_u2(&(cf->constant_pool[i]
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.info.invoke_dynamic_info.bootstrap_method_attr_index),
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1, file);
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read_u2(
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&(cf->constant_pool[i].info.invoke_dynamic_info.name_and_type_index),
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1, file);
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break;
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break;
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case CONSTANT_Module:
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case CONSTANT_Module:
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size = sizeof(CONSTANT_Module_info);
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read_u2(&(cf->constant_pool[i].info.module_info.name_index), 1, file);
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break;
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break;
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case CONSTANT_Package:
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case CONSTANT_Package:
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size = sizeof(CONSTANT_Package_info);
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read_u2(&(cf->constant_pool[i].info.package_info.name_index), 1, file);
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break;
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break;
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default:
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printf("unknown constant tag: %hhu\n", cf->constant_pool[i].tag);
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// assert(0);
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}
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}
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cf->constant_pool[i].info = (void *)malloc(size);
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fread(cf->constant_pool[i].info, size, 1, file);
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}
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}
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// access_flags 2bytes, this_class 2bytes, super_class 2bytes, interface_count
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// access_flags 2bytes, this_class 2bytes, super_class 2bytes, interface_count
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// 2bytes
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// 2byte
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fread(&(cf->access_flags), 2 + 2 + 2 + 2, 1, file);
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read_u2(&(cf->access_flags), 4, file);
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// interfaces
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// interfaces
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cf->interfaces = (u2 *)malloc(2 * cf->interfaces_count);
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cf->interfaces = (u2 *)malloc(2 * cf->interfaces_count);
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fread(cf->interfaces, 2 * cf->interfaces_count, 1, file);
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read_u2(cf->interfaces, cf->interfaces_count, file);
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// fields_count 2bytes
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// fields_count 2bytes
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fread(&(cf->fields_count), 2, 1, file);
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read_u2(&(cf->fields_count), 1, file);
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// fields
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// fields
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cf->fields = (field_info *)malloc(sizeof(field_info) * cf->fields_count);
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cf->fields = (field_info *)malloc(sizeof(field_info) * cf->fields_count);
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for (u2 i = 0; i < cf->fields_count; i++) {
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for (u2 i = 0; i < cf->fields_count; i++) {
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// access_flags 2bytes, name_index 2bytes, descriptor_index 2bytes,
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// access_flags 2bytes, name_index 2bytes, descriptor_index 2bytes,
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// attributes_count 2bytes
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// attributes_count 2bytes
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fread(&(cf->fields[i].access_flags), 2 + 2 + 2 + 2, 1, file);
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read_u2(&(cf->fields[i].access_flags), 4, file);
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cf->fields[i].attributes = (attribute_info *)malloc(
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cf->fields[i].attributes = (attribute_info *)malloc(
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sizeof(attribute_info) * cf->fields[i].attributes_count);
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sizeof(attribute_info) * cf->fields[i].attributes_count);
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for (u2 j = 0; j < cf->fields[i].attributes_count; j++) {
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for (u2 j = 0; j < cf->fields[i].attributes_count; j++) {
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// attribute_name_index 2bytes, attribute_length 4bytes
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// attribute_name_index 2bytes, attribute_length 4bytes
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fread(&(cf->fields[i].attributes[j].attribute_name_index), 2 + 4, 1,
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read_u2(&(cf->fields[i].attributes[j].attribute_name_index), 1, file);
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file);
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read_u4(&(cf->fields[i].attributes[j].attribute_length), 1, file);
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cf->fields[i].attributes[j].info =
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cf->fields[i].attributes[j].info =
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(u1 *)malloc(cf->fields[i].attributes[j].attribute_length);
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(u1 *)malloc(cf->fields[i].attributes[j].attribute_length);
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fread(cf->fields[i].attributes[j].info,
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fread(cf->fields[i].attributes[j].info,
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@ -138,20 +168,20 @@ ClassFile *ClassFile_load(const char *path) {
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}
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}
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// methods_count 2bytes
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// methods_count 2bytes
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fread(&(cf->methods_count), 2, 1, file);
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read_u2(&(cf->methods_count), 1, file);
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// methods
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// methods
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cf->methods = (method_info *)malloc(sizeof(method_info) * cf->methods_count);
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cf->methods = (method_info *)malloc(sizeof(method_info) * cf->methods_count);
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for (u2 i = 0; i < cf->methods_count; i++) {
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for (u2 i = 0; i < cf->methods_count; i++) {
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// access_flags 2bytes, name_index 2bytes, descriptor_index 2bytes,
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// access_flags 2bytes, name_index 2bytes, descriptor_index 2bytes,
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// attributes_count 2bytes
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// attributes_count 2bytes
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fread(&(cf->methods[i].access_flags), 2 + 2 + 2 + 2, 1, file);
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read_u2(&(cf->methods[i].access_flags), 4, file);
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cf->methods[i].attributes = (attribute_info *)malloc(
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cf->methods[i].attributes = (attribute_info *)malloc(
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sizeof(attribute_info) * cf->methods[i].attributes_count);
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sizeof(attribute_info) * cf->methods[i].attributes_count);
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for (u2 j = 0; j < cf->methods[i].attributes_count; j++) {
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for (u2 j = 0; j < cf->methods[i].attributes_count; j++) {
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// attribute_name_index 2bytes, attribute_length 4bytes
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// attribute_name_index 2bytes, attribute_length 4bytes
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fread(&(cf->methods[i].attributes[j].attribute_name_index), 2 + 4, 1,
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read_u2(&(cf->methods[i].attributes[j].attribute_name_index), 1, file);
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file);
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read_u4(&(cf->methods[i].attributes[j].attribute_length), 1, file);
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cf->methods[i].attributes[j].info =
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cf->methods[i].attributes[j].info =
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(u1 *)malloc(cf->methods[i].attributes[j].attribute_length);
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(u1 *)malloc(cf->methods[i].attributes[j].attribute_length);
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fread(cf->methods[i].attributes[j].info,
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fread(cf->methods[i].attributes[j].info,
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@ -160,14 +190,15 @@ ClassFile *ClassFile_load(const char *path) {
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}
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}
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// attributes_count 2bytes
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// attributes_count 2bytes
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fread(&(cf->attributes_count), 2, 1, file);
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read_u2(&(cf->attributes_count), 1, file);
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// attributes
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// attributes
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cf->attributes =
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cf->attributes =
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(attribute_info *)malloc(sizeof(attribute_info) * cf->attributes_count);
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(attribute_info *)malloc(sizeof(attribute_info) * cf->attributes_count);
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for (u2 i = 0; i < cf->attributes_count; i++) {
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for (u2 i = 0; i < cf->attributes_count; i++) {
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// attribute_name_index 2bytes, attribute_length 4bytes
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// attribute_name_index 2bytes, attribute_length 4bytes
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fread(&(cf->attributes[i].attribute_name_index), 2 + 4, 1, file);
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read_u2(&(cf->attributes[i].attribute_name_index), 1, file);
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read_u4(&(cf->attributes[i].attribute_length), 1, file);
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cf->attributes[i].info = (u1 *)malloc(cf->attributes[i].attribute_length);
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cf->attributes[i].info = (u1 *)malloc(cf->attributes[i].attribute_length);
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fread(cf->attributes[i].info, cf->attributes[i].attribute_length, 1, file);
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fread(cf->attributes[i].info, cf->attributes[i].attribute_length, 1, file);
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}
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}
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@ -182,7 +213,7 @@ void ClassFile_info(const ClassFile *cf) {
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"minor_version=%hu\n"
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"minor_version=%hu\n"
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"major_version=%hu\n"
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"major_version=%hu\n"
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"constant_pool_count=%hu\n"
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"constant_pool_count=%hu\n"
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"access_flags=%hu\n"
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"access_flags=%hx\n"
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"this_class=%hu\n"
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"this_class=%hu\n"
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"super_class=%hu\n"
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"super_class=%hu\n"
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"interfaces_count=%hu\n"
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"interfaces_count=%hu\n"
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40
classfile.h
40
classfile.h
@ -52,17 +52,10 @@ typedef enum {
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} CONSTANT_TAGS;
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} CONSTANT_TAGS;
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typedef struct {
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typedef struct {
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u1 tag;
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void *info;
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} cp_info;
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typedef struct {
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u1 tag;
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u2 name_index;
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u2 name_index;
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} CONSTANT_Class_info;
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} CONSTANT_Class_info;
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typedef struct {
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typedef struct {
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u1 tag;
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u2 class_index;
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u2 class_index;
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u2 name_and_type_index;
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u2 name_and_type_index;
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} CONSTANT_Fieldref_info;
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} CONSTANT_Fieldref_info;
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@ -70,63 +63,76 @@ typedef CONSTANT_Fieldref_info CONSTANT_Methodref_info;
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typedef CONSTANT_Fieldref_info CONSTANT_InterfaceMethodref_info;
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typedef CONSTANT_Fieldref_info CONSTANT_InterfaceMethodref_info;
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typedef struct {
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typedef struct {
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u1 tag;
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u2 string_index;
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u2 string_index;
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} CONSTANT_String_info;
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} CONSTANT_String_info;
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typedef struct {
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typedef struct {
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u1 tag;
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u4 bytes;
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u4 bytes;
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} CONSTANT_Integer_info;
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} CONSTANT_Integer_info;
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typedef CONSTANT_Integer_info CONSTANT_Float_info;
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typedef CONSTANT_Integer_info CONSTANT_Float_info;
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typedef struct {
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typedef struct {
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u1 tag;
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u4 high_bytes;
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u4 high_bytes;
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u4 low_bytes;
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u4 low_bytes;
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} CONSTANT_Long_info;
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} CONSTANT_Long_info;
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typedef CONSTANT_Long_info CONSTANT_Double_info;
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typedef CONSTANT_Long_info CONSTANT_Double_info;
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typedef struct {
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typedef struct {
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u1 tag;
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u2 name_index;
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u2 name_index;
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u2 descriptor_index;
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u2 descriptor_index;
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} CONSTANT_NameAndType_info;
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} CONSTANT_NameAndType_info;
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typedef struct {
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typedef struct {
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u1 tag;
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u2 length;
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u2 length;
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u1 *bytes;
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u1 *bytes;
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} CONSTANT_Utf8_info;
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} CONSTANT_Utf8_info;
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typedef struct {
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typedef struct {
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u1 tag;
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u1 reference_kind;
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u1 reference_kind;
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u2 reference_index;
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u2 reference_index;
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} CONSTANT_MethodHandle_info;
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} CONSTANT_MethodHandle_info;
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typedef struct {
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typedef struct {
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u1 tag;
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u2 descriptor_index;
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u2 descriptor_index;
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} CONSTANT_MethodType_info;
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} CONSTANT_MethodType_info;
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typedef struct {
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typedef struct {
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u1 tag;
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u2 bootstrap_method_attr_index;
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u2 bootstrap_method_attr_index;
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u2 name_and_type_index;
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u2 name_and_type_index;
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} CONSTANT_Dynamic_info;
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} CONSTANT_Dynamic_info;
|
||||||
typedef CONSTANT_Dynamic_info CONSTANT_InvokeDynamic_info;
|
typedef CONSTANT_Dynamic_info CONSTANT_InvokeDynamic_info;
|
||||||
|
|
||||||
typedef struct {
|
typedef struct {
|
||||||
u1 tag;
|
|
||||||
u2 name_index;
|
u2 name_index;
|
||||||
} CONSTANT_Module_info;
|
} CONSTANT_Module_info;
|
||||||
|
|
||||||
typedef struct {
|
typedef struct {
|
||||||
u1 tag;
|
|
||||||
u2 name_index;
|
u2 name_index;
|
||||||
} CONSTANT_Package_info;
|
} CONSTANT_Package_info;
|
||||||
|
|
||||||
|
typedef struct {
|
||||||
|
u1 tag;
|
||||||
|
union {
|
||||||
|
CONSTANT_Class_info class_info;
|
||||||
|
CONSTANT_Fieldref_info fieldref_info;
|
||||||
|
CONSTANT_Methodref_info methodref_info;
|
||||||
|
CONSTANT_InterfaceMethodref_info interface_methodred_info;
|
||||||
|
CONSTANT_String_info string_info;
|
||||||
|
CONSTANT_Integer_info integer_info;
|
||||||
|
CONSTANT_Float_info float_info;
|
||||||
|
CONSTANT_Long_info long_info;
|
||||||
|
CONSTANT_Double_info double_info;
|
||||||
|
CONSTANT_NameAndType_info name_and_type_info;
|
||||||
|
CONSTANT_Utf8_info utf8_info;
|
||||||
|
CONSTANT_MethodHandle_info method_handle_info;
|
||||||
|
CONSTANT_MethodType_info method_type_info;
|
||||||
|
CONSTANT_Dynamic_info dynamic_info;
|
||||||
|
CONSTANT_InvokeDynamic_info invoke_dynamic_info;
|
||||||
|
CONSTANT_Module_info module_info;
|
||||||
|
CONSTANT_Package_info package_info;
|
||||||
|
} info;
|
||||||
|
} cp_info;
|
||||||
|
|
||||||
typedef struct {
|
typedef struct {
|
||||||
u2 attribute_name_index;
|
u2 attribute_name_index;
|
||||||
u4 attribute_length;
|
u4 attribute_length;
|
||||||
|
Loading…
Reference in New Issue
Block a user