style: formatting
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parent
bce3e3bf25
commit
906b2d03e3
81
wai.c
81
wai.c
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@ -24,12 +24,12 @@
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*/
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#include <endian.h>
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#include <inttypes.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <inttypes.h>
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enum section {
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Section_Custom,
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@ -101,20 +101,14 @@ enum TYPE {
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TYPE_I64 = 0x7E,
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TYPE_F32 = 0x7D,
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TYPE_F64 = 0x7C,
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TYPE_V128= 0x7B,
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TYPE_V128 = 0x7B,
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TYPE_FUNCREF = 0x70,
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TYPE_EXTERNREF = 0x6F
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};
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static const int TYPE_SIZE[] = {
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[TYPE_I32] = 4,
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[TYPE_I64] = 8,
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[TYPE_F32] = 4,
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[TYPE_F64] = 8,
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[TYPE_V128] = 16,
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[TYPE_FUNCREF] = 16,
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[TYPE_EXTERNREF] = 16
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};
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[TYPE_I32] = 4, [TYPE_I64] = 8, [TYPE_F32] = 4, [TYPE_F64] = 8,
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[TYPE_V128] = 16, [TYPE_FUNCREF] = 16, [TYPE_EXTERNREF] = 16};
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struct value_t {
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enum TYPE type;
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@ -129,7 +123,11 @@ struct value_t {
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} value;
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};
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#define incr(i, len) i++; if (i >= len) {return -1;}
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#define incr(i, len) \
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i++; \
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if (i >= len) { \
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return -1; \
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}
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void stack_push(struct stack *s, const struct value_t *value) {
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size_t type_size = TYPE_SIZE[value->type];
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@ -145,25 +143,25 @@ void stack_push(struct stack *s, const struct value_t *value) {
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switch (t) {
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case TYPE_I32:
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printf("%d (I32)", *(int32_t*)value);
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printf("%d (I32)", *(int32_t *)value);
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break;
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case TYPE_I64:
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printf("%ld (I32)", *(int64_t*)value);
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printf("%ld (I32)", *(int64_t *)value);
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break;
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case TYPE_F32:
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printf("%f (F32)", *(float*)value);
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printf("%f (F32)", *(float *)value);
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break;
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case TYPE_F64:
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printf("%f (F64)", *(double*)value);
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printf("%f (F64)", *(double *)value);
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break;
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case TYPE_V128:
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printf("%ld (V128)", *(__int128*)value);
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printf("%ld (V128)", *(__int128 *)value);
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break;
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case TYPE_FUNCREF:
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printf("%ld (EREF)", *(int64_t*)value);
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printf("%ld (EREF)", *(int64_t *)value);
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break;
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case TYPE_EXTERNREF:
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printf("%ld (EREF)", *(int64_t*)value);
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printf("%ld (EREF)", *(int64_t *)value);
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break;
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}
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printf(", ");
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@ -172,8 +170,9 @@ void stack_push(struct stack *s, const struct value_t *value) {
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}
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void stack_top(struct stack *s, struct value_t *value) {
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value->type = s->items[s->bytes-1];
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memcpy(&value->value, &(s->items[s->bytes - 1 - TYPE_SIZE[value->type]]), TYPE_SIZE[value->type]);
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value->type = s->items[s->bytes - 1];
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memcpy(&value->value, &(s->items[s->bytes - 1 - TYPE_SIZE[value->type]]),
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TYPE_SIZE[value->type]);
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}
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void stack_pop(struct stack *s, struct value_t *value) {
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@ -201,10 +200,12 @@ int parse_type(u_char *binary, int len) {
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return i;
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}
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int parse_function(struct module *module, u_char *binary, double param, int len);
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int parse_instruction(struct module *module, u_char *binary, double param, int len) {
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int parse_function(struct module *module, u_char *binary, double param,
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int len);
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int parse_instruction(struct module *module, u_char *binary, double param,
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int len) {
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int i = 0;
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enum INSTRUCTION instr = (u_char) binary[i];
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enum INSTRUCTION instr = (u_char)binary[i];
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u_char *instr_addr = &binary[i];
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struct value_t a = {0};
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struct value_t b = {0};
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@ -226,7 +227,7 @@ int parse_instruction(struct module *module, u_char *binary, double param, int l
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break;
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case INSTR_F64_CONST:
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result.type = TYPE_F64;
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result.value.f64 = *(double*)&binary[i];
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result.value.f64 = *(double *)&binary[i];
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i += 8;
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stack_push(&module->stack, &result);
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break;
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@ -290,17 +291,20 @@ int parse_instruction(struct module *module, u_char *binary, double param, int l
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case INSTR_LOCAL_GET: {
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int local_index = binary[i];
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incr(i, len);
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stack_push(&module->stack, &(struct value_t) {.value.f64 = param, .type = TYPE_F64});
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stack_push(&module->stack,
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&(struct value_t){.value.f64 = param, .type = TYPE_F64});
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break;
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}
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default:
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printf("unknown instruction! %x at %lx\n", instr, instr_addr - module->binary);
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printf("unknown instruction! %x at %lx\n", instr,
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instr_addr - module->binary);
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exit(1);
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}
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return i;
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}
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int parse_function(struct module *module, u_char *binary, double param, int len) {
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int parse_function(struct module *module, u_char *binary, double param,
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int len) {
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int i = 0;
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int body_size = binary[i];
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incr(i, len);
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@ -322,7 +326,7 @@ int parse_section(struct module *module, u_char *binary, int len) {
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incr(i, len);
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printf("section %x with size %d\n", type, size);
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switch ((enum section) type) {
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switch ((enum section)type) {
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case Section_Custom:
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break;
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case Section_Type:
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@ -367,8 +371,10 @@ int parse_section(struct module *module, u_char *binary, int len) {
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printf("section: exports\n");
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int num_exports = binary[i];
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if(num_exports > MAX_FUNCTIONS) {
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printf("Number of exports exceeds maximum number of functions in a module (%d)", MAX_FUNCTIONS);
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if (num_exports > MAX_FUNCTIONS) {
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printf("Number of exports exceeds maximum number of functions in a "
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"module (%d)",
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MAX_FUNCTIONS);
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return -1;
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}
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@ -379,13 +385,13 @@ int parse_section(struct module *module, u_char *binary, int len) {
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export->name_length = binary[i];
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incr(i, len);
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for (int si = 0; si < export->name_length; si++) {
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for (size_t si = 0; si < export->name_length; si++) {
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export->name[si] = binary[i];
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incr(i, len);
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}
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export->description = (int) binary[i];
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export->description = (int)binary[i];
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incr(i, len);
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export->index = (uint32_t) binary[i];
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export->index = (uint32_t)binary[i];
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printf("export name: %s of type %d\n", export->name, export->description);
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incr(i, len);
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}
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@ -413,7 +419,9 @@ int parse_section(struct module *module, u_char *binary, int len) {
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exit(1);
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}
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if (size == 0x0) {incr(i, len);}
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if (size == 0x0) {
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incr(i, len);
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}
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return i;
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}
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@ -421,14 +429,14 @@ int parse_module(u_char *binary, size_t len) {
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int i = 0;
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char *magic = "\0asm";
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while (i < 4) {
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if ((char) binary[i] != magic[i]) {
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if ((char)binary[i] != magic[i]) {
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fprintf(stderr, "no wasm magic\n");
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return 0;
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}
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incr(i, len);
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}
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printf("magic found\n");
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printf("wasm version: %d\n", le32toh(*(int*)&binary[i]));
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printf("wasm version: %d\n", le32toh(*(int *)&binary[i]));
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i += 4;
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printf("addr %d\n", i);
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@ -468,4 +476,3 @@ int main(int argc, char **argv) {
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fclose(file);
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return 0;
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}
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