static void extract_sb_section(struct sb_section_t *sec)
{
if(sec->is_data)
{
char sec_name[5];
char *filename = xmalloc(strlen(g_out_prefix) + 32);
sb_fill_section_name(sec_name, sec->identifier);
sprintf(filename, "%s%s.bin", g_out_prefix, sec_name);
FILE *fd = fopen(filename, "wb");
if(fd == NULL)
bugp("Cannot open %s for writing\n", filename);
if(g_debug)
printf("Write data section %s to %s\n", sec_name, filename);
free(filename);
for(int j = 0; j < sec->nr_insts; j++)
{
assert(sec->insts[j].inst == SB_INST_DATA);
fwrite(sec->insts[j].data, sec->insts[j].size, 1, fd);
}
fclose(fd);
}
int elf_count = 0;
struct elf_params_t elf;
elf_init(&elf);
for(int i = 0; i < sec->nr_insts; i++)
{
struct sb_inst_t *inst = &sec->insts[i];
switch(inst->inst)
{
case SB_INST_LOAD:
elf_add_load_section(&elf, inst->addr, inst->size, inst->data);
break;
case SB_INST_FILL:
elf_add_fill_section(&elf, inst->addr, inst->size, inst->pattern);
break;
case SB_INST_CALL:
case SB_INST_JUMP:
elf_set_start_addr(&elf, inst->addr);
extract_elf_section(&elf, elf_count++, sec->identifier);
elf_release(&elf);
elf_init(&elf);
break;
default:
/* ignore mode and nop */
break;
}
}
if(!elf_is_empty(&elf))
extract_elf_section(&elf, elf_count, sec->identifier);
elf_release(&elf);
}
static void extract_sb1_file(struct sb1_file_t *file)
{
int elf_count = 0;
struct elf_params_t elf;
elf_init(&elf);
int bss_idx = 0, text_idx = 0;
char secname[32];
for(int i = 0; i < file->nr_insts; i++)
{
struct sb1_inst_t *inst = &file->insts[i];
switch(inst->cmd)
{
case SB1_INST_LOAD:
sprintf(secname, ".text%d", text_idx++);
elf_add_load_section(&elf, inst->addr, inst->size, inst->data, secname);
break;
case SB1_INST_FILL:
sprintf(secname, ".bss%d", bss_idx++);
elf_add_fill_section(&elf, inst->addr, inst->size, inst->pattern, secname);
break;
case SB1_INST_CALL:
case SB1_INST_JUMP:
elf_set_start_addr(&elf, inst->addr);
extract_elf(&elf, elf_count++);
elf_release(&elf);
elf_init(&elf);
break;
default:
/* ignore mode and nop */
break;
}
}
if(!elf_is_empty(&elf))
extract_elf(&elf, elf_count);
elf_release(&elf);
}
static void extract_section(int data_sec, char name[5], byte *buf, int size, const char *indent)
{
char filename[PREFIX_SIZE + 32];
snprintf(filename, sizeof filename, "%s%s.bin", out_prefix, name);
FILE *fd = fopen(filename, "wb");
if (fd != NULL) {
fwrite(buf, size, 1, fd);
fclose(fd);
}
if(data_sec)
return;
snprintf(filename, sizeof filename, "%s%s", out_prefix, name);
/* elf construction */
struct elf_params_t elf;
elf_init(&elf);
int elf_count = 0;
/* Pretty print the content */
int pos = 0;
while(pos < size)
{
struct sb_instruction_header_t *hdr = (struct sb_instruction_header_t *)&buf[pos];
printf("%s", indent);
uint8_t checksum = instruction_checksum(hdr);
if(checksum != hdr->checksum)
{
color(GREY);
printf("[Bad checksum]");
}
if(hdr->opcode == SB_INST_LOAD)
{
struct sb_instruction_load_t *load = (struct sb_instruction_load_t *)&buf[pos];
color(RED);
printf("LOAD");
color(OFF);printf(" | ");
color(BLUE);
printf("addr=0x%08x", load->addr);
color(OFF);printf(" | ");
color(GREEN);
printf("len=0x%08x", load->len);
color(OFF);printf(" | ");
color(YELLOW);
printf("crc=0x%08x", load->crc);
/* data is padded to 16-byte boundary with random data and crc'ed with it */
uint32_t computed_crc = crc(&buf[pos + sizeof(struct sb_instruction_load_t)],
ROUND_UP(load->len, 16));
color(RED);
if(load->crc == computed_crc)
printf(" Ok\n");
else
printf(" Failed (crc=0x%08x)\n", computed_crc);
/* elf construction */
elf_add_load_section(&elf, load->addr, load->len,
&buf[pos + sizeof(struct sb_instruction_load_t)]);
pos += load->len + sizeof(struct sb_instruction_load_t);
// unsure about rounding
pos = ROUND_UP(pos, 16);
}
else if(hdr->opcode == SB_INST_FILL)
{
struct sb_instruction_fill_t *fill = (struct sb_instruction_fill_t *)&buf[pos];
color(RED);
printf("FILL");
color(OFF);printf(" | ");
color(BLUE);
printf("addr=0x%08x", fill->addr);
color(OFF);printf(" | ");
color(GREEN);
printf("len=0x%08x", fill->len);
color(OFF);printf(" | ");
color(YELLOW);
printf("pattern=0x%08x\n", fill->pattern);
color(OFF);
/* elf construction */
elf_add_fill_section(&elf, fill->addr, fill->len, fill->pattern);
pos += sizeof(struct sb_instruction_fill_t);
// fixme: useless as pos is a multiple of 16 and fill struct is 4-bytes wide ?
pos = ROUND_UP(pos, 16);
}
else if(hdr->opcode == SB_INST_CALL ||
hdr->opcode == SB_INST_JUMP)
{
int is_call = (hdr->opcode == SB_INST_CALL);
struct sb_instruction_call_t *call = (struct sb_instruction_call_t *)&buf[pos];
color(RED);
if(is_call)
printf("CALL");
else
printf("JUMP");
color(OFF);printf(" | ");
color(BLUE);
printf("addr=0x%08x", call->addr);
color(OFF);printf(" | ");
color(GREEN);
printf("arg=0x%08x\n", call->arg);
color(OFF);
/* elf construction */
elf_set_start_addr(&elf, call->addr);
extract_elf_section(&elf, elf_count++, filename, indent);
elf_release(&elf);
elf_init(&elf);
pos += sizeof(struct sb_instruction_call_t);
// fixme: useless as pos is a multiple of 16 and call struct is 4-bytes wide ?
pos = ROUND_UP(pos, 16);
}
else
{
color(RED);
printf("Unknown instruction %d at address 0x%08lx\n", hdr->opcode, (unsigned long)pos);
break;
}
}
if(!elf_is_empty(&elf))
extract_elf_section(&elf, elf_count++, filename, indent);
elf_release(&elf);
}
static void extract_sb_section(struct sb_section_t *sec, struct cmd_file_t *cmd_file)
{
struct cmd_section_t *db_sec = db_add_section(cmd_file, sec->identifier, sec->is_data);
db_add_int_opt(&db_sec->opt_list, "alignment", sec->alignment);
db_add_int_opt(&db_sec->opt_list, "cleartext", sec->is_cleartext);
db_add_int_opt(&db_sec->opt_list, "sectionFlags", sec->other_flags);
if(sec->is_data)
{
char sec_name[5];
char *filename = xmalloc(strlen(g_out_prefix) + 32);
sb_fill_section_name(sec_name, sec->identifier);
sprintf(filename, "%s%s.bin", g_out_prefix, sec_name);
db_add_source(cmd_file, sec_name, filename + strlen(g_out_prefix));
db_sec->source_id = strdup(sec_name);
FILE *fd = fopen(filename, "wb");
if(fd == NULL)
bugp("Cannot open %s for writing\n", filename);
if(g_debug)
printf("Write data section %s to %s\n", sec_name, filename);
free(filename);
for(int j = 0; j < sec->nr_insts; j++)
{
assert(sec->insts[j].inst == SB_INST_DATA);
fwrite(sec->insts[j].data, sec->insts[j].size, 1, fd);
}
fclose(fd);
}
int elf_count = 0;
struct elf_params_t elf;
elf_init(&elf);
int bss_idx = 0, text_idx = 0;
char secname[32];
for(int i = 0; i < sec->nr_insts; i++)
{
struct sb_inst_t *inst = &sec->insts[i];
switch(inst->inst)
{
case SB_INST_LOAD:
sprintf(secname, ".text%d", text_idx++);
elf_add_load_section(&elf, inst->addr, inst->size, inst->data, secname);
break;
case SB_INST_FILL:
sprintf(secname, ".bss%d", bss_idx++);
elf_add_fill_section(&elf, inst->addr, inst->size, inst->pattern, secname);
break;
case SB_INST_CALL:
case SB_INST_JUMP:
elf_set_start_addr(&elf, inst->addr);
extract_elf_section(&elf, elf_count++, sec->identifier, cmd_file, db_sec,
inst->inst == SB_INST_CALL, inst->argument);
elf_release(&elf);
elf_init(&elf);
bss_idx = text_idx = 0;
break;
default:
/* ignore mode and nop */
break;
}
}
if(!elf_is_empty(&elf))
extract_elf_section(&elf, elf_count, sec->identifier, cmd_file, db_sec, false, 0);
elf_release(&elf);
}