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#include <interp.h>
#include <interp_private.h>
#include <opcodes.h>
#include <ops.h>
#include <wasm_types.h>
#include <errno.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static const enum opcode initexpr_opcodes[] =
{
OP_NOP,
OP_END,
OP_I32_CONST,
OP_I64_CONST,
OP_F32_CONST,
OP_F64_CONST
};
const struct interp_set interp_initexpr_set =
{
.opcodes = initexpr_opcodes,
.n = sizeof initexpr_opcodes / sizeof *initexpr_opcodes
};
static int (*const ops[])(struct interp *) =
{
[OP_UNREACHABLE] = op_unreachable,
[OP_NOP] = op_nop,
[OP_BLOCK] = op_block,
[OP_LOOP] = op_loop,
[OP_IF] = op_if,
[OP_ELSE] = op_else,
[OP_END] = op_end,
[OP_BR] = op_br,
[OP_BR_IF] = op_br_if,
[OP_BR_TABLE] = op_br_table,
[OP_RETURN] = op_return,
[OP_CALL] = op_call,
[OP_CALL_INDIRECT] = op_call_indirect,
[OP_GET_LOCAL] = op_get_local,
[OP_SET_LOCAL] = op_set_local,
[OP_TEE_LOCAL] = op_tee_local,
[OP_GET_GLOBAL] = op_get_global,
[OP_SET_GLOBAL] = op_set_global,
[OP_I32_LOAD] = op_i32_load,
[OP_I32_STORE] = op_i32_store,
[OP_I32_CONST] = op_i32_const,
[OP_F64_CONST] = op_i64_const,
[OP_F32_CONST] = op_f32_const,
[OP_F64_CONST] = op_f64_const,
[OP_I32_SUB] = op_i32_sub
};
const char *interp_get_exception(const struct interp *const i)
{
return i->exception;
}
int interp_run(struct interp *const i)
{
uint8_t op;
FILE *const f = i->cfg.f;
if (!fread(&op, sizeof op, 1, f))
{
fprintf(stderr, "%s: fread(3) failed, feof=%d, ferror=%d\n",
__func__, feof(f), ferror(f));
return 1;
}
else if (op >= sizeof ops / sizeof *ops)
{
fprintf(stderr, "%s: invalid opcode %#" PRIx8 "\n", __func__, op);
return 1;
}
else if (!ops[op])
{
fprintf(stderr, "%s: unsupported opcode %#" PRIx8 "\n", __func__, op);
return 1;
}
return ops[op](i);
}
static int run_opcode_limited(struct interp *const in,
const struct interp_set *const set)
{
uint8_t op;
FILE *const f = in->cfg.f;
if (!fread(&op, sizeof op, 1, f))
{
fprintf(stderr, "%s: fread(3) failed, feof=%d, ferror=%d\n",
__func__, feof(f), ferror(f));
return -1;
}
for (size_t i = 0; i < set->n; i++)
if (op == set->opcodes[i])
return ops[op](in);
fprintf(stderr, "%s: unexpected opcode %#" PRIx8 "\n", __func__, op);
return -1;
}
int interp_run_limited(struct interp *const in,
const struct interp_set *const set)
{
while (!in->exit)
if (run_opcode_limited(in, set))
{
fprintf(stderr, "%s: run_opcode_limited failed\n", __func__);
return -1;
}
return 0;
}
int interp_check_opcode(const uint8_t op, FILE *const f)
{
static int (*const checks[])(FILE *) =
{
[OP_UNREACHABLE] = check_unreachable,
[OP_NOP] = check_nop,
[OP_BLOCK] = check_block,
[OP_LOOP] = check_loop,
[OP_IF] = check_if,
[OP_ELSE] = check_else,
[OP_END] = check_end,
[OP_BR] = check_br,
[OP_BR_IF] = check_br_if,
[OP_BR_TABLE] = check_br_table,
[OP_RETURN] = check_return,
[OP_CALL] = check_call,
[OP_CALL_INDIRECT] = check_call_indirect,
[OP_GET_LOCAL] = check_get_local,
[OP_SET_LOCAL] = check_set_local,
[OP_TEE_LOCAL] = check_tee_local,
[OP_GET_GLOBAL] = check_get_global,
[OP_SET_GLOBAL] = check_set_global,
[OP_I32_LOAD] = check_i32_load,
[OP_I32_STORE] = check_i32_store,
[OP_I32_CONST] = check_i32_const,
[OP_F64_CONST] = check_i64_const,
[OP_F32_CONST] = check_f32_const,
[OP_F64_CONST] = check_f64_const,
[OP_I32_SUB] = check_i32_sub
};
if (op >= sizeof checks / sizeof *checks)
{
fprintf(stderr, "%s: invalid opcode %#" PRIx8 "\n", __func__, op);
return 1;
}
else if (!checks[op])
{
fprintf(stderr, "%s: unsupported opcode %#" PRIx8 "\n", __func__, op);
return 1;
}
return checks[op](f);
}
void interp_free(struct interp *const i)
{
free(i);
}
struct interp *interp_alloc(const struct interp_cfg *const cfg)
{
struct interp *const ret = malloc(sizeof *ret);
if (!ret)
{
fprintf(stderr, "%s: malloc(3): %s\n", __func__, strerror(errno));
return NULL;
}
*ret = (const struct interp)
{
.cfg = *cfg
};
return ret;
}
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