static struct write_list *
mk_empty_ptable(void)
{
struct write_list *wr;
static const short int magic = 0xAA55;
wr = alloc_wl(72);
if (!wr)
return NULL;
memset(wr->data, 0, 70);
memcpy(wr->data + 70, &magic, sizeof(magic));
wr->offset = 440;
return wr;
}
static struct write_list *
mk_empty_ptable(void)
{
struct write_list *wr;
static const unsigned char magic[2] = {0x55, 0xAA};
wr = alloc_wl(66);
if (!wr)
return NULL;
memset(wr->data, 0, 64);
memcpy(wr->data + 64, magic, sizeof(magic));
wr->offset = 446;
return wr;
}
static struct write_list *
mk_pri_pentry(struct disk_info *dinfo, struct part_info *pinfo, int pnum,
uint32_t *lba)
{
struct write_list *item;
struct pc_partition *pentry;
if (pnum >= PC_NUM_BOOT_RECORD_PARTS) {
LOGE("Maximum number of primary partition exceeded.");
return NULL;
}
if (!(item = alloc_wl(sizeof(struct pc_partition)))) {
LOGE("Unable to allocate memory for partition entry.");
return NULL;
}
{
/* DO NOT DEREFERENCE */
struct pc_boot_record *mbr = (void *)PC_MBR_DISK_OFFSET;
/* grab the offset in mbr where to write this partition entry. */
item->offset = (loff_t)((uint32_t)((uint8_t *)(&mbr->ptable[pnum])));
}
pentry = (struct pc_partition *) &item->data;
/* need a standard primary partition entry */
if (pinfo) {
/* need this to be 64 bit in case len_kb is large */
uint64_t len_lba;
if (pinfo->len_kb != (uint32_t)-1) {
/* bump it up to the next LBA boundary just in case */
len_lba = ((uint64_t)pinfo->len_kb * 1024);
len_lba += ((uint64_t)dinfo->sect_size - 1);
len_lba &= ~((uint64_t)dinfo->sect_size - 1);
len_lba /= (uint64_t)dinfo->sect_size;
} else {
/* make it fill the rest of disk */
len_lba = dinfo->num_lba - *lba;
}
cfg_pentry(pentry, ((pinfo->flags & PART_ACTIVE_FLAG) ?
PC_PART_ACTIVE : PC_PART_NORMAL),
pinfo->type, *lba, (uint32_t)len_lba);
pinfo->start_lba = *lba;
*lba += (uint32_t)len_lba;
} else {
/* this should be made an extended partition, and should take
* up the rest of the disk as a primary partition */
cfg_pentry(pentry, PC_PART_NORMAL, PC_PART_TYPE_EXTENDED,
*lba, dinfo->num_lba - *lba);
/* note that we do not update the *lba because we now have to
* create a chain of extended partition tables, and first one is at
* *lba */
}
return item;
}
/* This function configures an extended boot record at the beginning of an
* extended partition. This creates a logical partition and a pointer to
* the next EBR.
*
* ext_lba == The start of the toplevel extended partition (pointed to by the
* entry in the MBR).
*/
static struct write_list *
mk_ext_pentry(struct disk_info *dinfo, struct part_info *pinfo, uint32_t *lba,
uint32_t ext_lba, struct part_info *pnext)
{
struct write_list *item;
struct pc_boot_record *ebr;
uint32_t len; /* in lba units */
if (!(item = alloc_wl(sizeof(struct pc_boot_record)))) {
LOGE("Unable to allocate memory for EBR.");
return NULL;
}
/* we are going to write the ebr at the current LBA, and then bump the
* lba counter since that is where the logical data partition will start */
item->offset = (*lba) * dinfo->sect_size;
(*lba)++;
ebr = (struct pc_boot_record *) &item->data;
memset(ebr, 0, sizeof(struct pc_boot_record));
ebr->mbr_sig = PC_BIOS_BOOT_SIG;
if (pinfo->len_kb != (uint32_t)-1)
len = kb_to_lba(pinfo->len_kb, dinfo->sect_size);
else {
if (pnext) {
LOGE("Only the last partition can be specified to fill the disk "
"(name = '%s')", pinfo->name);
goto fail;
}
len = dinfo->num_lba - *lba;
/* update the pinfo structure to reflect the new size, for
* bookkeeping */
pinfo->len_kb =
(uint32_t)(((uint64_t)len * (uint64_t)dinfo->sect_size) /
((uint64_t)1024));
}
cfg_pentry(&ebr->ptable[PC_EBR_LOGICAL_PART], PC_PART_NORMAL,
pinfo->type, 1, len);
pinfo->start_lba = *lba;
*lba += len;
/* If this is not the last partition, we have to create a link to the
* next extended partition.
*
* Otherwise, there's nothing to do since the "pointer entry" is
* already zero-filled.
*/
if (pnext) {
/* The start lba for next partition is an offset from the beginning
* of the top-level extended partition */
uint32_t next_start_lba = *lba - ext_lba;
uint32_t next_len_lba;
if (pnext->len_kb != (uint32_t)-1)
next_len_lba = 1 + kb_to_lba(pnext->len_kb, dinfo->sect_size);
else
next_len_lba = dinfo->num_lba - *lba;
cfg_pentry(&ebr->ptable[PC_EBR_NEXT_PTR_PART], PC_PART_NORMAL,
PC_PART_TYPE_EXTENDED, next_start_lba, next_len_lba);
}
return item;
fail:
free_wl(item);
return NULL;
}
int process_defexternal()
{
int token;
struct word_list *relation;
DEF_EXT *cur_def_ex_funcs;
/*============================*/
/* Check for defexternal name */
/*============================*/
token = gettoken(cur_file);
IF(token NEQ WORD) THEN
error_message(ERROR, "Expected a name following defexternal keyword!");
find_rht_paren();
return(ERROR);
END_IF
cur_obj_name = TKNWORD;
IF(VERBOSE IS_ON) THEN
sprintf(msg_buf,"\n\nProcessing defexternal: %.40s",cur_obj_name);
send_message(msg_buf,NO);
END_IF
/*============================================*/
/* Check if function has been previously used */
/*============================================*/
IF(find_ex_func(ex_funcs_head, cur_obj_name) NEQ NULL) THEN
sprintf(msg_buf, "External function %.40s defined after being used.\n",
cur_obj_name);
error_message(WARNING, msg_buf);
END_IF
/*======================================*/
/* Get pointer to defexternal structure */
/*======================================*/
def_ext_head = find_create_def_ex_func(def_ext_head, cur_obj_name);
cur_def_ex_funcs = current_de;
/*===================================*/
/* Begin processing defexternal info */
/*===================================*/
token = gettoken(cur_file);
IF(token NEQ LPAREN) THEN
error_message(ERROR, "Expecting a left paren inside a defexternal");
return(RESTART);
END_IF
/*=================================*/
/* Check for ART style defexternal */
/*=================================*/
IF((token EQ BWORD) OR (token EQ BWORDS)) THEN
find_rht_paren(); /* Ignore ART style code */
find_rht_paren(); /* Provided for compatibility */
return(ERROR); /* Return error, not restart */
END_IF
/*===================================*/
/* Read and process defexternal info */
/*===================================*/
while(token NEQ RPAREN) DO
/*======================================*/
/* Find opening paren, and get key word */
/*======================================*/
IF(token NEQ LPAREN) THEN
error_message(ERROR, "Expecting a left paren inside a defexternal");
return(RESTART);
END_IF
token = gettoken(cur_file);
IF((token EQ WORD) AND
(strcmp("true-function-name",TKNWORD) EQ 0)) THEN
/*============================================*
* Process true function name *
*============================================*/
token = gettoken(cur_file);
IF((token NEQ WORD) AND (token NEQ STRING)) THEN
error_message(ERROR, "Expecting a word or a string for ");
send_message("true-function-name in defexternal",NO);
ELSE
cur_def_ex_funcs->true_name = TKNWORD;
END_IF
find_rht_paren();
ELSE_IF((token EQ WORD) AND (strcmp("asserts",TKNWORD) EQ 0))
/*===========================================================*
* Process the relations asserted by the external function *
*===========================================================*/
token = gettoken(cur_file);
IF(token == RPAREN) THEN
error_message(ERROR, "Expecting a word, string, ?NONE ");
send_message("or ?VARIABLE after asserts in defexternal",NO);
END_IF
while (token NEQ RPAREN) DO
IF(token EQ BWORD) THEN
IF((strcmp(TKNWORD,"VARIABLE") NEQ 0) AND
(strcmp(TKNWORD,"NONE") NEQ 0)) THEN
error_message(ERROR,
"Unidentified word, expected VARIABLE or NONE after ?");
END_IF
ELSE_IF((token NEQ WORD) AND (token NEQ STRING))
error_message(ERROR, "Expecting a word, string, ?NONE, or ");
send_message("?VARIABLE after asserts in defexternal",NO);
find_rht_paren();
ELSE
relation = alloc_wl();
relation->word = TKNWORD;
relation->next_word = cur_def_ex_funcs->assert_list;
cur_def_ex_funcs->assert_list = relation;
END_IF
token = gettoken(cur_file);
END_WHILE
ELSE_IF((token EQ WORD) AND (strcmp("retracts",TKNWORD) EQ 0))
/*============================================================*
* Process the relations retracted by the external function *
*============================================================*/
token = gettoken(cur_file);
IF(token == RPAREN) THEN
error_message(ERROR, "Expecting a word, string, ?NONE ");
send_message("or ?VARIABLE after retracts in defexternal",NO);
END_IF
while (token NEQ RPAREN) DO
IF(token EQ BWORD) THEN
IF((strcmp(TKNWORD,"VARIABLE") NEQ 0) AND
(strcmp(TKNWORD,"NONE") NEQ 0)) THEN
error_message(ERROR,
"Unidentified word, expected VARIABLE or NONE after ?");
END_IF
ELSE_IF((token NEQ WORD) AND (token NEQ STRING))
error_message(ERROR, "Expecting a word, string, ?NONE, or ");
send_message("?VARIABLE after retracts in defexternal",NO);
find_rht_paren();
ELSE
relation = alloc_wl();
relation->word = TKNWORD;
relation->next_word = cur_def_ex_funcs->retract_list;
cur_def_ex_funcs->retract_list = relation;
END_IF
token = gettoken(cur_file);
END_WHILE
ELSE_IF((token EQ WORD) AND (strcmp("min-number-of-args", TKNWORD) EQ 0))
/*=================================*/
/* Process min-number-of-arguments */
/*=================================*/
token = gettoken(cur_file);
IF((token EQ BWORD) AND (strcmp("VARIABLE", TKNWORD) EQ 0)) THEN
cur_def_ex_funcs->min_arguments = 0;
ELSE_IF(token NEQ NUMBER)
error_message(ERROR,
"Expecting a number for argument min-number-of-argument in defexternal");
ELSE
cur_def_ex_funcs->min_arguments = TKNNUMBER;
END_IF
find_rht_paren();
ELSE_IF((token EQ WORD) AND (strcmp("max-number-of-args", TKNWORD) EQ 0))
/*=================================*/
/* Process max-number-of-arguments */
/*=================================*/
token = gettoken(cur_file);
IF((token EQ BWORD) AND (strcmp("VARIABLE", TKNWORD) EQ 0)) THEN
cur_def_ex_funcs->max_arguments = 10000;
ELSE_IF(token NEQ NUMBER)
error_message(ERROR,
"Expecting a number for argument max-number-of-arguments definition");
ELSE
cur_def_ex_funcs->max_arguments = TKNNUMBER;
END_IF
find_rht_paren();
ELSE_IF((token EQ WORD) AND (strcmp("return-type",TKNWORD) == 0))
/*================================*
* Process return-type *
*================================*/
token = gettoken(cur_file);
IF(token NEQ WORD) THEN
error_message(ERROR, "Expecting NUMBER, STRING, WORD, ");
send_message("MULTI, or NONE for return type",NO);
ELSE
IF(strcmp(TKNWORD,"MULTI") EQ 0) THEN
cur_def_ex_funcs->return_word = YES;
cur_def_ex_funcs->return_string = YES;
cur_def_ex_funcs->return_number = YES;
ELSE_IF((strcmp(TKNWORD,"FLOAT") EQ 0) OR
(strcmp(TKNWORD,"NUMBER") EQ 0) OR
(strcmp(TKNWORD,"INTEGER") EQ 0))
cur_def_ex_funcs->return_number = YES;
ELSE_IF((strcmp(TKNWORD,"NONE")) EQ 0)
cur_def_ex_funcs->return_word = NO;
cur_def_ex_funcs->return_string = NO;
cur_def_ex_funcs->return_number = NO;
ELSE_IF(strcmp(TKNWORD,"STRING") EQ 0)
cur_def_ex_funcs->return_string = YES;
ELSE_IF((strcmp(TKNWORD,"CHARACTER") EQ 0) OR
(strcmp(TKNWORD,"WORD") EQ 0))
cur_def_ex_funcs->return_word = YES;
ELSE
error_message(ERROR, "Expecting NUMBER, STRING, WORD, ");
send_message("MULTI, or NONE for return type",NO);
END_IF
END_IF
if(token != RPAREN)
find_rht_paren();
ELSE_IF((token EQ WORD) AND (strcmp("argument", TKNWORD) EQ 0))
/*=============================== */
/* Process an argument definition */
/*=============================== */
(void)process_argument_def(cur_def_ex_funcs);
ELSE
/*========================*/
/* Unrecognized key word! */
/*========================*/
sprintf(msg_buf,
"Unrecognized definition: %.40s inside a defexternal", TKNWORD);
error_message(ERROR, msg_buf);
find_rht_paren();
END_IF
token = gettoken(cur_file);
END_WHILE
return(OK);
}
