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1111 lines
28 KiB
1111 lines
28 KiB
3 years ago
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/* BEGIN_LEGAL
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Copyright (c) 2021 Intel Corporation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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END_LEGAL */
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// more natural assembly language parser
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#include <assert.h>
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#include <stdint.h>
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#include <string.h> // strcmp, strncmp
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#include <stdlib.h> // malloc, free
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#include <stdio.h> // vprintf, fprintf
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#include <ctype.h> // isspace, isdigit, isalnum
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#include <stdarg.h>
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#include "xed-examples-util.h" // xed_upcase_buf
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#include "xed-asmparse.h"
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static int asp_dbg_verbosity = 1;
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/* PROTOTYPES */
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static char* asp_strdup(const char* s);
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static void upcase(char* s);
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static void delete_slist_t(slist_t* s);
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static slist_t* get_slist_node(void);
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static void clean_out_memparse_rec_t(memparse_rec_t* p);
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static void delete_opnd_list_t(opnd_list_t* s);
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static opnd_list_t* get_opnd_list_node(void);
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static void add_decorator(opnd_list_t* onode, char* d);
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static void grab_prefixes(char**p, xed_enc_line_parsed_t* v);
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static void study_prefixes(xed_enc_line_parsed_t* v);
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static void grab_inst(char**p, xed_enc_line_parsed_t* v);
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static void grab_operand(char**p, xed_enc_line_parsed_t* v);
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//static slist_t* reverse_list(slist_t* head);
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static int isreg(char* s);
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static int isdecorator(char* s);
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static int64_t letter_cvt(char a, char base);
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static int asm_isnumber(char* s, int64_t* onum, int arg_negative);
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static int ismemref(char* s);
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static int valid_decorator(char const* s);
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static int grab_decorator(char* s, unsigned int pos, char** optr);
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static void parse_reg(xed_enc_line_parsed_t* v, char* s, opnd_list_t* onode);
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static void parse_decorator(char* s, opnd_list_t* onode);
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static void parse_memref(char* s, opnd_list_t* onode);
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static void refine_operand(xed_enc_line_parsed_t* v, char* s);
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static void refine_operands(xed_enc_line_parsed_t* v);
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static unsigned int skip_spaces(char *s, unsigned int offset);
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/////////////////////////
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static char* asp_strdup(char const* s) {
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return xed_strdup(s);
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}
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/* Verbosity levels:
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0 - only errors and end result
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1 - informational messages about implicit decision made by encoder,
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such as correction of operand sizes, bitness etc
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2 - debugging info */
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void asp_set_verbosity(int v) {
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asp_dbg_verbosity = v;
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}
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void asp_printf(const char* format, ...) {
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if (asp_dbg_verbosity < 1)
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return;
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va_list args;
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va_start(args, format);
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vprintf(format, args);
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va_end(args);
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}
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void asp_dbg_printf(const char* format, ...) {
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if (asp_dbg_verbosity < 2)
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return;
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va_list args;
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va_start(args, format);
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vprintf(format, args);
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va_end(args);
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}
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/* Errors are always printed to stderr */
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void asp_error_printf(const char* format, ...) {
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va_list args;
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va_start(args, format);
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fprintf(stderr, "ERROR: ");
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vfprintf(stderr, format, args);
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va_end(args);
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}
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static void upcase(char* s) {
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(void)xed_upcase_buf(s);
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}
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static void delete_slist_t(slist_t* s) {
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slist_t* p = s;
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while(p) {
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slist_t* t = p;
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p=p->next;
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free(t->s); // FIXME: might free static stuff!
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free(t);
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}
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}
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static slist_t* get_slist_node() {
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slist_t* node = (slist_t*)malloc(sizeof(slist_t));
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assert(node != 0);
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node->s = 0;
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node->next = 0;
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return node;
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}
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static void clean_out_memparse_rec_t(memparse_rec_t* p) {
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if (p->seg)
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free(p->seg);
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if (p->base)
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free(p->base);
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if (p->index)
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free(p->index);
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if (p->disp)
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free(p->disp);
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if (p->scale)
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free(p->scale);
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p->mem_size = 0; // not allocated!
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p->mem_bits = 0;
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p->ndisp = 0;
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}
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static void delete_opnd_list_t(opnd_list_t* s) {
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opnd_list_t* p = s;
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while(p) {
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opnd_list_t* t = p;
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free(p->s);
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clean_out_memparse_rec_t(&p->mem);
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delete_slist_t(p->decorators);
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p = p->next;
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free(t);
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}
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}
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xed_enc_line_parsed_t* asp_get_xed_enc_node(void) {
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xed_enc_line_parsed_t* v = (xed_enc_line_parsed_t*)
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malloc(sizeof(xed_enc_line_parsed_t));
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assert(v != 0);
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memset(v, 0, sizeof(xed_enc_line_parsed_t));
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return v;
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}
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void asp_delete_xed_enc_line_parsed_t(xed_enc_line_parsed_t* v) {
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if (v->iclass_str)
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free(v->iclass_str);
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if (v->input)
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free(v->input);
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delete_slist_t(v->operands);
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delete_slist_t(v->prefixes);
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delete_opnd_list_t(v->opnds);
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free(v);
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}
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static opnd_list_t* get_opnd_list_node() {
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opnd_list_t* p = (opnd_list_t*)malloc(sizeof(opnd_list_t));
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assert(p != 0);
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memset(p, 0, sizeof(opnd_list_t));
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p->type = OPND_INVALID;
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return p;
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}
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static void add_decorator(opnd_list_t* onode, char* d) {
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slist_t* dnode = get_slist_node();
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dnode->s = d;
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dnode->next = onode->decorators;
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onode->decorators = dnode;
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}
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static char const* decorators[] = {
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"{K0}",
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"{K1}",
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"{K2}",
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"{K3}",
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"{K4}",
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"{K5}",
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"{K6}",
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"{K7}",
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"{Z}",
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"{RNE-SAE}",
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"{RD-SAE}",
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"{RU-SAE}",
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"{RZ-SAE}",
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"{SAE}",
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"{1TO2}",
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"{1TO4}",
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"{1TO8}",
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"{1TO16}",
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"{1TO32}",
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"{1TO64}",
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0 };
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static char const* mem_size_qualifiers[] = {
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"BYTE",
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"WORD",
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"DWORD",
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"QWORD",
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"XMMWORD",
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"YMMWORD",
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"ZMMWORD",
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0
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};
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static char const* scales[] = {
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"1",
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"2",
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"4",
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"8",
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0
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};
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static void study_prefixes(xed_enc_line_parsed_t* v) {
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slist_t* p = v->prefixes;
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while(p) {
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if (strcmp("REPNE",p->s) == 0)
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v->seen_repne = 1;
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else if (strcmp("REPE",p->s) == 0)
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v->seen_repe = 1;
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else if (strcmp("REP",p->s) == 0)
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v->seen_repe = 1;
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else if (strcmp("LOCK",p->s) == 0)
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v->seen_lock = 1;
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p = p->next;
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}
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}
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static void grab_prefixes(char**p, xed_enc_line_parsed_t* v)
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{
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// grab any matching strings up to next space
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char const* prefixes[] = { "DATA16", "DATA32",
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"ADDR16", "ADDR32",
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"REX", "REWXW",
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"XACQUIRE", "XRELEASE",
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"LOCK",
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"REP", "REPE", "REPNE",
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0 };
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char* h = asp_strdup(*p);
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char* q = h;
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char* r = h;
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unsigned int found=1;
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do {
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unsigned int i=0;
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r = q;
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while(*q) {
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if (isspace(*q)) {
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*q = 0; // jam a null
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q++;
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break;
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}
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q++;
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}
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found = 0;
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for (i=0; prefixes[i]; i++) {
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if (strcmp(r, prefixes[i]) == 0) {
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slist_t* node = 0;
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// matched a prefix
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found = 1;
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//grab the string, pointed to by r
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asp_dbg_printf("PREFIX [%s]\n",r);
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node = get_slist_node();
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node->s = asp_strdup(r);
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if (v->prefixes)
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node->next = v->prefixes;
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v->prefixes = node;
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// advance q to next nonspace
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while(*q && isspace(*q))
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q++;
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break;
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}
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}
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}
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while(found);
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// r-h is the distance in the copy of the string we've advanced through so far.
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*p = *p + (r-h);
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free(h);
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}
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static void grab_inst(char**p, xed_enc_line_parsed_t* v)
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{
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// grab next non-whitespace string
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char* q = *p;
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while(*q) {
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if (isspace(*q)) {
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*q = 0; // jam a null
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q++;
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break;
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}
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q++;
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}
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v->iclass_str = asp_strdup(*p);
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/* Note that it is not the final iclass as it may require mangling */
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asp_dbg_printf("MNEMONIC [%s]\n",v->iclass_str);
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*p = q;
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}
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static void grab_operand(char**p, xed_enc_line_parsed_t* v)
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{
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// grab next operand string (reg, memop) with decorations
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slist_t* node = 0;
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char* q = *p;
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char* r = 0;
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while(*q && isspace(*q))
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q++;
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// grab until next comma or end-of-string
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r = q;
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while(*q && *q != ',')
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q++;
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if (*q) {
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*q = 0; // jam null or overwrite null
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q++;
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}
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// remove trailing white space
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if (q>r) {
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char *z = q-1; // start at null
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while (z > r) {
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if (*z == 0) {
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z--;
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continue;
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}
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if (isspace(*z)) {
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*z = 0;
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z--;
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continue;
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}
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break;
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}
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}
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asp_dbg_printf("OPERAND: [%s]\n", r);
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node = get_slist_node();
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node->s = asp_strdup(r);
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if (v->operands)
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node->next = v->operands;
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v->operands = node;
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*p = q;
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}
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#if 0
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/*
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a->b->c->d->0
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p q
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0<-a b->c->d->0
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p q
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0<-a<-b c->d->0
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p q t
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0<-a<-b<-c d->0
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p q t
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0<-a<-b<-c<-d 0
|
||
|
|
p q t
|
||
|
|
|
||
|
|
0<-a<-b<-c<-d 0
|
||
|
|
p q
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
static slist_t* reverse_list(slist_t* head) {
|
||
|
|
slist_t* p = head; // prev
|
||
|
|
slist_t* q = 0; // current
|
||
|
|
slist_t* t = 0; // dangling head of rest of list
|
||
|
|
|
||
|
|
if (p && p->next) {
|
||
|
|
q = p->next;
|
||
|
|
p->next = 0; // new end of list
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return p;
|
||
|
|
|
||
|
|
while(q) {
|
||
|
|
t = q->next;
|
||
|
|
q->next = p;
|
||
|
|
p = q;
|
||
|
|
q = t;
|
||
|
|
}
|
||
|
|
return p;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static int isreg(char* s) { // including decorators
|
||
|
|
if (s) {
|
||
|
|
if (isalpha(s[0])) {
|
||
|
|
int i;
|
||
|
|
for(i=1;s[i];i++)
|
||
|
|
// allow alnum, dash & parens (x87), curlies, else bail
|
||
|
|
if ( !isalnum(s[i]) &&
|
||
|
|
s[i] != '{' &&
|
||
|
|
s[i] != '(' &&
|
||
|
|
s[i] != ')' &&
|
||
|
|
s[i] != '-' &&
|
||
|
|
s[i] != '}' )
|
||
|
|
return 0;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
static int isdecorator(char* s) {
|
||
|
|
if (s) {
|
||
|
|
if (s[0] == '{') {
|
||
|
|
int i;
|
||
|
|
for(i=1;s[i];i++)
|
||
|
|
// allow alnum, dash & right-curly, else bail
|
||
|
|
if ( !isalnum(s[i]) &&
|
||
|
|
s[i] != '-' &&
|
||
|
|
s[i] != '}' )
|
||
|
|
return 0;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Return true if s matches pattern "num:num" */
|
||
|
|
static int islongptr(char *s) {
|
||
|
|
if (!s)
|
||
|
|
return 0;
|
||
|
|
/* skip optional "far" */
|
||
|
|
if (s[0] == 'F' && s[1] == 'A' && s[2] == 'R') {
|
||
|
|
s += 3;
|
||
|
|
s += skip_spaces(s, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
int column_pos = -1;
|
||
|
|
for (int i = 0; s[i]; i++) {
|
||
|
|
if (s[i] == ':') {
|
||
|
|
column_pos = i;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (column_pos < 0)
|
||
|
|
return 0;
|
||
|
|
char *first = s;
|
||
|
|
char *second = s + column_pos + 1;
|
||
|
|
s[column_pos] = '\0'; // temporarily split the string
|
||
|
|
int64_t unused = 0;
|
||
|
|
int res = asm_isnumber(first, &unused, 0)
|
||
|
|
&& asm_isnumber(second, &unused, 0); // both parts are numbers
|
||
|
|
s[column_pos] = ':'; // restore the separator
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int64_t letter_cvt(char a, char base) {
|
||
|
|
return (int64_t)(a-base);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int asm_isnumber(char* s, int64_t* onum, int arg_negative) {
|
||
|
|
// return 1/0 if the string s is a number, and store the number in
|
||
|
|
// onum. Handles base10, binary (0b prefix), octal (0 prefix) and hex
|
||
|
|
// (0x prefix) number strings.
|
||
|
|
|
||
|
|
// The arg_negative will normally be zero, but I encountered a case
|
||
|
|
// when parsing displacements where the minus sign was already eaten by
|
||
|
|
// the parser and I didn't want to reallocate the string just to
|
||
|
|
// reassociate the minus sign with the number. So for that case, I
|
||
|
|
// added a arg_negative to allow me to force the number to be negative
|
||
|
|
// without there being an actual leading minus sign present.
|
||
|
|
|
||
|
|
|
||
|
|
int binary = 0;
|
||
|
|
int hex = 0;
|
||
|
|
int octal = 0;
|
||
|
|
int negative = 0;
|
||
|
|
unsigned int i = 0;
|
||
|
|
unsigned int j = 0;
|
||
|
|
unsigned int len = xed_strlen(s);
|
||
|
|
int64_t val = 0;
|
||
|
|
|
||
|
|
if (arg_negative) {
|
||
|
|
negative = 1;
|
||
|
|
}
|
||
|
|
if (s[0]=='-') {
|
||
|
|
negative = 1;
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
if (s[0] == '+') {
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (i < len && isdigit(s[i])) { //first digit
|
||
|
|
if (s[i]=='0' && i+1 < len) {
|
||
|
|
if (s[i+1] == 'B') {
|
||
|
|
binary = 1;
|
||
|
|
i+=2;
|
||
|
|
}
|
||
|
|
else if (s[i+1] == 'X') {
|
||
|
|
hex = 1;
|
||
|
|
i+=2;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
octal = 1;
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (binary) {
|
||
|
|
for(j=i;j<len;j++) {
|
||
|
|
if (s[j] != '0' && s[j] != '1')
|
||
|
|
return 0; // bad binary number
|
||
|
|
else
|
||
|
|
val = val << 1 | (s[j] == '1');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (hex) {
|
||
|
|
for(j=i;j<len;j++) {
|
||
|
|
if (!isdigit(s[j]) && (s[j] < 'A' || s[j] > 'F') )
|
||
|
|
return 0; // bad hex number
|
||
|
|
else if (isdigit(s[j]))
|
||
|
|
val = val << 4 | letter_cvt(s[j],'0');
|
||
|
|
else
|
||
|
|
val = val << 4 | (letter_cvt(s[j],'A')+10 );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (octal) {
|
||
|
|
for(j=i;j<len;j++) {
|
||
|
|
if (s[j] < '0' || s[j] > '7')
|
||
|
|
return 0; // bad octal number
|
||
|
|
else
|
||
|
|
val = val << 3 | letter_cvt(s[j],'0');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else { //decimal
|
||
|
|
for(j=i;j<len;j++) {
|
||
|
|
if (!isdigit(s[j]))
|
||
|
|
return 0; // bad normal number
|
||
|
|
else
|
||
|
|
val = val * 10 + letter_cvt(s[j],'0');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
asp_dbg_printf("IMM value 0x%016llx\n",val);
|
||
|
|
if (negative) {
|
||
|
|
if ((val >> 63ULL) == 1) {
|
||
|
|
asp_error_printf("Bad immediate operand - too big to be negative: %s\n",s);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
val = - val; // FIXME: 2018-11-30 wcvt. error negeating unsigned value...
|
||
|
|
asp_dbg_printf("IMM value 0x%016llx\n",val);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
*onum = val;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned int skip_spaces(char *s, unsigned int offset) {
|
||
|
|
while (s[offset] && isspace(s[offset])) {
|
||
|
|
offset++;
|
||
|
|
}
|
||
|
|
return offset;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ismemref(char* s) { // FIXME include directorators
|
||
|
|
if (s) {
|
||
|
|
unsigned int i=0,offset=0;
|
||
|
|
for(i=0;mem_size_qualifiers[i];i++) {
|
||
|
|
unsigned int len;
|
||
|
|
len = xed_strlen(mem_size_qualifiers[i]);
|
||
|
|
if (strncmp(mem_size_qualifiers[i],s,len) == 0) {
|
||
|
|
offset = len;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
offset = skip_spaces(s, offset);
|
||
|
|
/* skip optional "ptr" part of memref */
|
||
|
|
if (!strncmp(s + offset, "PTR", 3)) {
|
||
|
|
offset += 3;
|
||
|
|
offset = skip_spaces(s, offset);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (s[offset] == '[') {
|
||
|
|
// search backwards from end as there might be some {...} decorators.
|
||
|
|
unsigned int len = xed_strlen(s);
|
||
|
|
for(i=len-1;i>offset && i>0;i--) {
|
||
|
|
if (s[i] == ']')
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#define BLEN 100
|
||
|
|
|
||
|
|
static int valid_decorator(char const* s) {
|
||
|
|
int i=0;
|
||
|
|
while(decorators[i]) {
|
||
|
|
if (strcmp(decorators[i],s) == 0)
|
||
|
|
return 1;
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
static int grab_decorator(char* s, unsigned int pos, char** optr)
|
||
|
|
{
|
||
|
|
char tbuf[BLEN];
|
||
|
|
int tpos=0;
|
||
|
|
char* p = s+pos;
|
||
|
|
int start = 0;
|
||
|
|
while(*p) {
|
||
|
|
if (start == 0 && *p == '{') {
|
||
|
|
start = 1;
|
||
|
|
tbuf[tpos++] = *p;
|
||
|
|
}
|
||
|
|
else if (start) {
|
||
|
|
tbuf[tpos++] = *p;
|
||
|
|
if (*p == '}') {
|
||
|
|
tbuf[tpos]=0;
|
||
|
|
if (valid_decorator(tbuf)) {
|
||
|
|
*optr = asp_strdup(tbuf);
|
||
|
|
return (int)(pos+1);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
asp_error_printf("Bad decorator: %s\n", tbuf);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
p++;
|
||
|
|
pos++;
|
||
|
|
}
|
||
|
|
*optr = 0;
|
||
|
|
if (start) { // we started something but didn't finish it.
|
||
|
|
asp_error_printf("Bad decorator: %s\n", tbuf);
|
||
|
|
exit(1);
|
||
|
|
return -1; //notreached
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void parse_reg(xed_enc_line_parsed_t* v, char* s, opnd_list_t* onode)
|
||
|
|
{
|
||
|
|
char tbuf[BLEN];
|
||
|
|
unsigned int i=0;
|
||
|
|
unsigned int len=0;
|
||
|
|
|
||
|
|
len = xed_strlen(s);
|
||
|
|
|
||
|
|
while(i<len && s[i] && s[i] != '{') {
|
||
|
|
tbuf[i] = s[i];
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
tbuf[i]=0;
|
||
|
|
asp_dbg_printf("REGISTER: %s\n",tbuf);
|
||
|
|
onode->s = asp_strdup(tbuf);
|
||
|
|
onode->type = OPND_REG;
|
||
|
|
onode->reg = str2xed_reg_enum_t(onode->s);
|
||
|
|
|
||
|
|
if (onode->reg >= XED_REG_CR0 && onode->reg <= XED_REG_CR15) {
|
||
|
|
v->seen_cr = 1;
|
||
|
|
}
|
||
|
|
if (onode->reg >= XED_REG_DR0 && onode->reg <= XED_REG_DR7) {
|
||
|
|
v->seen_dr = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
while (i<len && s[i] == '{') {
|
||
|
|
char* d = 0;
|
||
|
|
int r;
|
||
|
|
r = grab_decorator(s,i, &d);
|
||
|
|
|
||
|
|
if (r<0) {
|
||
|
|
asp_error_printf("Decorator parsing error\n");
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
i = (unsigned int)r;
|
||
|
|
if (d) {
|
||
|
|
asp_dbg_printf("DECORATOR: %s\n",d);
|
||
|
|
add_decorator(onode,d);
|
||
|
|
}
|
||
|
|
if (d==0)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static void parse_decorator(char* s, opnd_list_t* onode)
|
||
|
|
{
|
||
|
|
unsigned int i=0;
|
||
|
|
unsigned int len=0;
|
||
|
|
|
||
|
|
len = xed_strlen(s);
|
||
|
|
onode->s = 0;
|
||
|
|
onode->type = OPND_DECORATOR;
|
||
|
|
while (i<len && s[i] == '{') {
|
||
|
|
char* d = 0;
|
||
|
|
int r;
|
||
|
|
r = grab_decorator(s,i, &d);
|
||
|
|
|
||
|
|
if (r<0) {
|
||
|
|
asp_error_printf("DECORATOR PARSING ERROR\n");
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
i = (unsigned int)r;
|
||
|
|
if (d) {
|
||
|
|
if (onode->s==0) {
|
||
|
|
asp_dbg_printf("DECORATOR: %s\n",d);
|
||
|
|
onode->s = d;
|
||
|
|
//add_decorator(onode,d);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
asp_error_printf("Too many lone decorators %s\n",s);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (d==0)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (onode->s == 0) {
|
||
|
|
asp_dbg_printf("No decorators: %s\n",s);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void parse_memref(char* s, opnd_list_t* onode)
|
||
|
|
{
|
||
|
|
// [ seg:reg + index * [1,2,4,8] +/- disp ]
|
||
|
|
memparse_rec_t r = { 0 };
|
||
|
|
r.len = xed_strlen(s);
|
||
|
|
assert(r.len < BLEN);
|
||
|
|
|
||
|
|
char tbuf[BLEN];
|
||
|
|
char stmp[BLEN];
|
||
|
|
char *q;
|
||
|
|
unsigned int i=0;
|
||
|
|
int p=0;
|
||
|
|
int plusses=0;
|
||
|
|
int last_star=0;
|
||
|
|
unsigned int offset=0;
|
||
|
|
|
||
|
|
for(i=0;mem_size_qualifiers[i];i++) {
|
||
|
|
unsigned int len;
|
||
|
|
len = xed_strlen(mem_size_qualifiers[i]);
|
||
|
|
if (strncmp(mem_size_qualifiers[i],s,len) == 0) {
|
||
|
|
asp_dbg_printf("MEM SIZE QUALIFIER: %s\n",mem_size_qualifiers[i]);
|
||
|
|
r.mem_size = mem_size_qualifiers[i]; // static string, not allocated
|
||
|
|
r.mem_bits = 1U << (i+3);
|
||
|
|
offset = len;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/* skip optional "ptr" part */
|
||
|
|
offset = skip_spaces(s, offset);
|
||
|
|
if (!strncmp(s+offset, "PTR", 3)) {
|
||
|
|
offset += 3;
|
||
|
|
}
|
||
|
|
|
||
|
|
// remove spaces -- makes figuring out terminators much easier!
|
||
|
|
for(i=0;s[offset+i];i++) {
|
||
|
|
unsigned int src_pos = offset + i;
|
||
|
|
if (!isspace(s[src_pos]))
|
||
|
|
stmp[p++] = s[src_pos];
|
||
|
|
}
|
||
|
|
stmp[p]=0;
|
||
|
|
p=0;
|
||
|
|
r.len=xed_strlen(stmp);
|
||
|
|
|
||
|
|
|
||
|
|
for(i=0;i<r.len;i++) {
|
||
|
|
if (stmp[i] == '[') {
|
||
|
|
assert(i==0);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
else if (stmp[i] == '+') { // can end base or index or scale
|
||
|
|
plusses++;
|
||
|
|
tbuf[p++]=0;
|
||
|
|
p=0;
|
||
|
|
q = asp_strdup(tbuf);
|
||
|
|
if (r.base && r.index)
|
||
|
|
r.scale=q;
|
||
|
|
else if (r.base)
|
||
|
|
r.index=q;
|
||
|
|
else
|
||
|
|
r.base=q;
|
||
|
|
}
|
||
|
|
else if (stmp[i] == '-') { // can end index or scale
|
||
|
|
plusses++;
|
||
|
|
r.minus++;
|
||
|
|
tbuf[p++]=0;
|
||
|
|
p=0;
|
||
|
|
q = asp_strdup(tbuf);
|
||
|
|
if (r.index)
|
||
|
|
r.scale=q;
|
||
|
|
else
|
||
|
|
r.index=q;
|
||
|
|
}
|
||
|
|
else if (stmp[i] == ':') { // can only end segment
|
||
|
|
tbuf[p++]=0;
|
||
|
|
p=0;
|
||
|
|
r.seg = asp_strdup(tbuf);
|
||
|
|
}
|
||
|
|
else if (stmp[i] == '*') { // can end index
|
||
|
|
tbuf[p++]=0;
|
||
|
|
p=0;
|
||
|
|
last_star=1;
|
||
|
|
r.index=asp_strdup(tbuf);
|
||
|
|
continue; // skip loop bottom
|
||
|
|
}
|
||
|
|
else if (stmp[i] == ']') { // can end base, index, scale or disp
|
||
|
|
int start_digit;
|
||
|
|
tbuf[p++]=0;
|
||
|
|
p=0;
|
||
|
|
q = asp_strdup(tbuf);
|
||
|
|
start_digit = isdigit(q[0]);
|
||
|
|
if (start_digit && (r.scale || r.minus || plusses==2 || last_star==0)) {
|
||
|
|
r.disp = q;
|
||
|
|
|
||
|
|
if (!asm_isnumber(q, &r.ndisp, r.minus)) {
|
||
|
|
asp_error_printf("Bad displacement: %s\n", q);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (last_star && start_digit)
|
||
|
|
r.scale=q;
|
||
|
|
else if (r.base==0 && start_digit==0)
|
||
|
|
r.base=q;
|
||
|
|
else if (r.index==0 && start_digit==0)
|
||
|
|
r.index=q;
|
||
|
|
else {
|
||
|
|
asp_error_printf("Internal error parsing memory operand\n");
|
||
|
|
exit(1); // FIXME: better error handling
|
||
|
|
}
|
||
|
|
i++; // skip over ']'
|
||
|
|
break; // done parsing memref
|
||
|
|
}
|
||
|
|
else if (isalnum(stmp[i])) {
|
||
|
|
tbuf[p++]= stmp[i];
|
||
|
|
}
|
||
|
|
|
||
|
|
else {
|
||
|
|
asp_error_printf("Internal error parsing SIB\n");
|
||
|
|
exit(1); // FIXME: better error handling
|
||
|
|
}
|
||
|
|
// loop bottom
|
||
|
|
last_star=0;
|
||
|
|
} //for loop over string
|
||
|
|
|
||
|
|
while (i<r.len && stmp[i] == '{') {
|
||
|
|
char* d = 0;
|
||
|
|
int rr;
|
||
|
|
rr = grab_decorator(stmp,i, &d);
|
||
|
|
if (rr<0) {
|
||
|
|
asp_error_printf("Decorator parsing error\n");
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
i = (unsigned int) rr;
|
||
|
|
|
||
|
|
if (d) {
|
||
|
|
asp_dbg_printf("DECORATOR: %s\n",d);
|
||
|
|
add_decorator(onode, d);
|
||
|
|
}
|
||
|
|
if (d==0)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (r.scale) {
|
||
|
|
int found = 0;
|
||
|
|
for(i=0;scales[i];i++) {
|
||
|
|
if (strcmp(r.scale,scales[i]) == 0) {
|
||
|
|
found = 1;
|
||
|
|
r.nscale = 1U<<i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!found) {
|
||
|
|
asp_error_printf("bad scale: %s\n",r.scale);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (r.seg)
|
||
|
|
asp_dbg_printf("SEG: %s\n",r.seg);
|
||
|
|
if (r.base)
|
||
|
|
asp_dbg_printf("BASE: %s\n",r.base);
|
||
|
|
if (r.index)
|
||
|
|
asp_dbg_printf("INDEX: %s\n",r.index);
|
||
|
|
if (r.scale)
|
||
|
|
asp_dbg_printf("SCALE: %s\n",r.scale);
|
||
|
|
if (r.disp)
|
||
|
|
asp_dbg_printf("DISP: %s = 0x%016llx\n",r.disp, r.ndisp);
|
||
|
|
onode->type = OPND_MEM;
|
||
|
|
onode->mem = r;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Extract semantic values from string: "far number:number" */
|
||
|
|
static void parse_long_pointer(char* s, opnd_list_t* onode)
|
||
|
|
{
|
||
|
|
/* skip optional "far" part */
|
||
|
|
if (s[0] == 'F' && s[1] == 'A' && s[2] == 'R') {
|
||
|
|
s += 3;
|
||
|
|
s += skip_spaces(s, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
int column_pos = -1;
|
||
|
|
for (int i = 0; s[i]; i++) {
|
||
|
|
if (s[i] == ':') {
|
||
|
|
column_pos = i;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
assert(column_pos >= 0);
|
||
|
|
char *first = s;
|
||
|
|
char *second = s + column_pos + 1;
|
||
|
|
s[column_pos] = '\0'; // split the string
|
||
|
|
int64_t first_num, second_num;
|
||
|
|
asm_isnumber(first, &first_num, 0);
|
||
|
|
asm_isnumber(second, &second_num, 0);
|
||
|
|
|
||
|
|
onode->farptr.seg = s;
|
||
|
|
onode->farptr.offset = s + column_pos + 1;
|
||
|
|
onode->farptr.seg_value = first_num;
|
||
|
|
onode->farptr.offset_value = second_num;
|
||
|
|
onode->type = OPND_FARPTR;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void refine_operand(xed_enc_line_parsed_t* v, char* s)
|
||
|
|
{
|
||
|
|
opnd_list_t* onode = get_opnd_list_node();
|
||
|
|
int64_t num = 0;
|
||
|
|
|
||
|
|
asp_dbg_printf("REFINE OPERAND [%s]\n", s);
|
||
|
|
if (isreg(s)) {
|
||
|
|
asp_dbg_printf("REGISTER-ish: %s\n",s);
|
||
|
|
parse_reg(v,s,onode);
|
||
|
|
}
|
||
|
|
else if (asm_isnumber(s,&num,0)) {
|
||
|
|
/* Actual meaning depends on opcode */
|
||
|
|
asp_dbg_printf("Immediate or displacement: %s\n",s);
|
||
|
|
onode->type = OPND_IMM;
|
||
|
|
onode->s = asp_strdup(s);
|
||
|
|
onode->imm = num;
|
||
|
|
}
|
||
|
|
else if (ismemref(s)) {
|
||
|
|
// [ seg:reg + index * [1,2,4,8] + disp ]
|
||
|
|
asp_dbg_printf("MEMREF-ish\n");
|
||
|
|
parse_memref(s,onode);
|
||
|
|
}
|
||
|
|
else if (isdecorator(s)) {
|
||
|
|
asp_dbg_printf("LONE DECORATOR\n");
|
||
|
|
parse_decorator(s,onode);
|
||
|
|
}
|
||
|
|
else if (islongptr(s)) {
|
||
|
|
asp_dbg_printf("LONG POINTER\n");
|
||
|
|
v->seen_far_ptr = 1;
|
||
|
|
parse_long_pointer(s,onode);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
asp_error_printf("Bad operand: %s\n",s);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
// add onode to list
|
||
|
|
onode->next = v->opnds;
|
||
|
|
v->opnds = onode;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void refine_operands(xed_enc_line_parsed_t* v)
|
||
|
|
{
|
||
|
|
slist_t* p = 0;
|
||
|
|
if (v->operands) {
|
||
|
|
//v->operands = reverse_list(v->operands);
|
||
|
|
p = v->operands;
|
||
|
|
while(p) {
|
||
|
|
refine_operand(v,p->s);
|
||
|
|
p = p->next;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void asp_parse_line(xed_enc_line_parsed_t* v)
|
||
|
|
{
|
||
|
|
char* p = asp_strdup(v->input);
|
||
|
|
char* q = p; // for deletion
|
||
|
|
int inst = 0;
|
||
|
|
int prefixes = 0;
|
||
|
|
upcase(p);
|
||
|
|
while(*p) {
|
||
|
|
if (isspace(*p)) {
|
||
|
|
p++; continue;
|
||
|
|
}
|
||
|
|
if (prefixes==0) {
|
||
|
|
grab_prefixes(&p,v);
|
||
|
|
study_prefixes(v);
|
||
|
|
prefixes = 1;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (inst==0) {
|
||
|
|
grab_inst(&p,v);
|
||
|
|
inst = 1;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (inst==1) { // grab operands
|
||
|
|
grab_operand(&p, v);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
p++;
|
||
|
|
}
|
||
|
|
|
||
|
|
refine_operands(v);
|
||
|
|
free(q);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void asp_print_parsed_line(xed_enc_line_parsed_t* v) {
|
||
|
|
slist_t* p=0;
|
||
|
|
opnd_list_t* q=0;
|
||
|
|
asp_printf("MODE: %d\n",v->mode);
|
||
|
|
asp_printf("MNEMONIC: %s\n",v->iclass_str);
|
||
|
|
asp_printf("PREFIXES: ");
|
||
|
|
p = v->prefixes;
|
||
|
|
while(p) {
|
||
|
|
asp_printf("%s ", p->s);
|
||
|
|
p = p->next;
|
||
|
|
}
|
||
|
|
asp_printf("\n");
|
||
|
|
|
||
|
|
asp_printf("OPERANDS: ");
|
||
|
|
p = v->operands;
|
||
|
|
while(p) {
|
||
|
|
asp_printf("<%s> ", p->s);
|
||
|
|
p = p->next;
|
||
|
|
}
|
||
|
|
asp_printf("\n");
|
||
|
|
|
||
|
|
|
||
|
|
asp_printf("OPERANDS DECODED:\n");
|
||
|
|
q = v->opnds;
|
||
|
|
while(q) {
|
||
|
|
slist_t* d = 0;
|
||
|
|
asp_printf("\t");
|
||
|
|
if (q->s) asp_printf("%s ", q->s);
|
||
|
|
|
||
|
|
switch (q->type) {
|
||
|
|
case OPND_REG: asp_printf("REG "); break;
|
||
|
|
case OPND_IMM: asp_printf("IMM 0x%016llx ", q->imm); break;
|
||
|
|
case OPND_DECORATOR: asp_printf("DECORATOR "); break;
|
||
|
|
case OPND_INVALID: asp_printf("INVALID "); break;
|
||
|
|
case OPND_MEM:
|
||
|
|
asp_printf("MEM "); break;
|
||
|
|
asp_printf("%d %s [%s:%s + %s*%s %s %s] ",
|
||
|
|
q->mem.len,
|
||
|
|
(q->mem.mem_size ? q->mem.mem_size : "n/a"),
|
||
|
|
(q->mem.seg ? q->mem.seg : "n/a"),
|
||
|
|
(q->mem.base ? q->mem.base : "n/a"),
|
||
|
|
(q->mem.index ? q->mem.index : "n/a"),
|
||
|
|
q->mem.scale,
|
||
|
|
(q->mem.minus ? "-" : "+"),
|
||
|
|
(q->mem.disp ? q->mem.disp : "n/a"));
|
||
|
|
break;
|
||
|
|
case OPND_FARPTR:
|
||
|
|
asp_printf("FAR PTR %s:%s", q->farptr.seg, q->farptr.offset);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
assert(0 && "Unhandled operand type");
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
d = q->decorators;
|
||
|
|
while(d) {
|
||
|
|
asp_printf("%s ",d->s);
|
||
|
|
d = d->next;
|
||
|
|
}
|
||
|
|
|
||
|
|
q = q->next;
|
||
|
|
asp_printf("\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
}
|
||
|
|
|