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erase_info.c
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erase_info.c
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/*
* erase_info.c
*
* Created by: Mahesh J Salgaonkar <mahesh@linux.vnet.ibm.com>
*
* Copyright (C) 2011 IBM Corporation
* Copyright (C) 2011 NEC Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "makedumpfile.h"
#include "print_info.h"
#include "dwarf_info.h"
#include "erase_info.h"
#include <dlfcn.h>
struct erase_info *erase_info = NULL;
unsigned long num_erase_info = 1; /* Node 0 is unused. */
struct call_back eppic_cb = {
&get_domain_all,
&readmem,
&get_die_attr_type,
&get_die_name,
&get_die_offset,
&get_die_length,
&get_die_member_all,
&get_die_nfields_all,
&get_symbol_addr_all,
&update_filter_info_raw
};
/*
* flags for config_entry.flag
*/
#define FILTER_ENTRY 0x0001
#define SIZE_ENTRY 0x0002
#define ITERATION_ENTRY 0x0004
#define LIST_ENTRY 0x0008
#define SYMBOL_ENTRY 0x0010
#define VAR_ENTRY 0x0020
#define TRAVERSAL_ENTRY 0x0040
#define ENTRY_RESOLVED 0x8000
/*
* flags for get_config()
*/
#define CONFIG_SKIP_SECTION 0x01
#define CONFIG_NEW_CMD 0x02
#define IS_KEYWORD(tkn) \
(!strcmp(tkn, "erase") || !strcmp(tkn, "size") || \
!strcmp(tkn, "nullify") || !strcmp(tkn, "for") || \
!strcmp(tkn, "in") || !strcmp(tkn, "within") || \
!strcmp(tkn, "endfor"))
struct module_sym_table {
unsigned int num_modules;
unsigned int current_mod;
struct module_info *modules;
};
/*
* Filtering physical address range.
*/
struct filter_info {
unsigned long long vaddr; /* symbol address for debugging */
unsigned long long paddr;
long size;
/* direct access to update erase information node */
int erase_info_idx; /* 0= invalid index */
int size_idx;
int erase_ch;
struct filter_info *next;
unsigned short nullify;
};
/*
* Filter config information
*/
struct filter_config {
char *name_filterconfig;
FILE *file_filterconfig;
char *cur_module;
char *saved_token;
char *token;
int new_section;
int line_count;
};
struct config_entry {
char *name;
char *type_name;
char *symbol_expr; /* original symbol expression */
unsigned short flag;
unsigned short nullify;
unsigned long long sym_addr; /* Symbol address */
unsigned long vaddr; /* Symbol address or
value pointed by sym_addr */
unsigned long long cmp_addr; /* for LIST_ENTRY */
unsigned long offset;
unsigned long type_flag;
long array_length;
long index;
long size;
int line; /* Line number in config file. */
int erase_info_idx; /* 0= invalid index */
struct config_entry *refer_to;
struct config_entry *next;
};
struct config {
char *module_name;
struct config_entry *iter_entry;
struct config_entry *list_entry;
int num_filter_symbols;
struct config_entry **filter_symbol;
struct config_entry **size_symbol;
};
static struct module_sym_table mod_st = { 0 };
static struct filter_info *filter_info = NULL;
static struct filter_config filter_config;
static char config_buf[BUFSIZE_FGETS];
/*
* Internal functions.
*/
static struct module_info *
get_loaded_module(char *mod_name)
{
unsigned int i;
struct module_info *modules;
modules = mod_st.modules;
if (strcmp(mod_name, modules[mod_st.current_mod].name)) {
for (i = 0; i < mod_st.num_modules; i++) {
if (!strcmp(mod_name, modules[i].name))
break;
}
if (i == mod_st.num_modules)
return NULL;
/* set the current_mod for fast lookup next time */
mod_st.current_mod = i;
}
return &modules[mod_st.current_mod];
}
static unsigned long long
find_module_symbol(struct module_info *module_ptr, char *symname)
{
int i;
struct symbol_info *sym_info;
sym_info = module_ptr->sym_info;
if (!sym_info)
return FALSE;
for (i = 1; i < module_ptr->num_syms; i++) {
if (sym_info[i].name && !strcmp(sym_info[i].name, symname))
return sym_info[i].value;
}
return NOT_FOUND_SYMBOL;
}
static int
sym_in_module(char *symname, unsigned long long *symbol_addr)
{
char *module_name;
struct module_info *module_ptr;
module_name = get_dwarf_module_name();
if (!mod_st.num_modules
|| !strcmp(module_name, "vmlinux")
|| !strcmp(module_name, "xen-syms"))
return FALSE;
module_ptr = get_loaded_module(module_name);
if (!module_ptr)
return FALSE;
*symbol_addr = find_module_symbol(module_ptr, symname);
if (*symbol_addr == NOT_FOUND_SYMBOL)
return FALSE;
else
return TRUE;
}
static unsigned int
get_num_modules(unsigned long head, unsigned int *num)
{
unsigned long cur;
unsigned int num_modules = 0;
if (!num)
return FALSE;
if (!readmem(VADDR, head + OFFSET(list_head.next), &cur, sizeof cur)) {
ERRMSG("Can't get next list_head.\n");
return FALSE;
}
while (cur != head) {
num_modules++;
if (!readmem(VADDR, cur + OFFSET(list_head.next),
&cur, sizeof cur)) {
ERRMSG("Can't get next list_head.\n");
return FALSE;
}
}
*num = num_modules;
return TRUE;
}
static void
free_symbol_info(struct module_info *module)
{
int i;
if (module->num_syms == 0)
return;
for (i = 1; i < module->num_syms; i++)
if (module->sym_info[i].name)
free(module->sym_info[i].name);
free(module->sym_info);
}
static void
clean_module_symbols(void)
{
int i;
for (i = 0; i < mod_st.num_modules; i++)
free_symbol_info(&mod_st.modules[i]);
if (mod_st.num_modules) {
free(mod_st.modules);
mod_st.modules = NULL;
mod_st.num_modules = 0;
}
}
static int
__load_module_symbol(struct module_info *modules, unsigned long addr_module)
{
int ret = FALSE;
unsigned int nsym;
unsigned long symtab, strtab;
unsigned long mod_base, mod_init;
unsigned int mod_size, mod_init_size;
unsigned char *module_struct_mem = NULL;
unsigned char *module_core_mem = NULL;
unsigned char *module_init_mem = NULL;
unsigned char *symtab_mem;
char *module_name, *strtab_mem, *nameptr;
unsigned int num_symtab;
/* Allocate buffer to read struct module data from vmcore. */
if ((module_struct_mem = calloc(1, SIZE(module))) == NULL) {
ERRMSG("Failed to allocate buffer for module\n");
return FALSE;
}
if (!readmem(VADDR, addr_module, module_struct_mem,
SIZE(module))) {
ERRMSG("Can't get module info.\n");
goto out;
}
module_name = (char *)(module_struct_mem + OFFSET(module.name));
if (strlen(module_name) < MOD_NAME_LEN)
strcpy(modules->name, module_name);
else
strncpy(modules->name, module_name, MOD_NAME_LEN-1);
mod_init = ULONG(module_struct_mem +
OFFSET(module.module_init));
mod_init_size = UINT(module_struct_mem +
OFFSET(module.init_size));
mod_base = ULONG(module_struct_mem +
OFFSET(module.module_core));
mod_size = UINT(module_struct_mem +
OFFSET(module.core_size));
DEBUG_MSG("Module: %s, Base: 0x%lx, Size: %u\n",
module_name, mod_base, mod_size);
if (mod_init_size > 0) {
module_init_mem = calloc(1, mod_init_size);
if (module_init_mem == NULL) {
ERRMSG("Can't allocate memory for module "
"init\n");
goto out;
}
if (!readmem(VADDR, mod_init, module_init_mem,
mod_init_size)) {
ERRMSG("Can't access module init in memory.\n");
goto out;
}
}
if ((module_core_mem = calloc(1, mod_size)) == NULL) {
ERRMSG("Can't allocate memory for module\n");
goto out;
}
if (!readmem(VADDR, mod_base, module_core_mem, mod_size)) {
ERRMSG("Can't access module in memory.\n");
goto out;
}
num_symtab = UINT(module_struct_mem +
OFFSET(module.num_symtab));
if (!num_symtab) {
ERRMSG("%s: Symbol info not available\n", module_name);
goto out;
}
modules->num_syms = num_symtab;
DEBUG_MSG("num_sym: %d\n", num_symtab);
symtab = ULONG(module_struct_mem + OFFSET(module.symtab));
strtab = ULONG(module_struct_mem + OFFSET(module.strtab));
/* check if symtab and strtab are inside the module space. */
if (!IN_RANGE(symtab, mod_base, mod_size) &&
!IN_RANGE(symtab, mod_init, mod_init_size)) {
ERRMSG("%s: module symtab is outside of module "
"address space\n", module_name);
goto out;
}
if (IN_RANGE(symtab, mod_base, mod_size))
symtab_mem = module_core_mem + (symtab - mod_base);
else
symtab_mem = module_init_mem + (symtab - mod_init);
if (!IN_RANGE(strtab, mod_base, mod_size) &&
!IN_RANGE(strtab, mod_init, mod_init_size)) {
ERRMSG("%s: module strtab is outside of module "
"address space\n", module_name);
goto out;
}
if (IN_RANGE(strtab, mod_base, mod_size))
strtab_mem = (char *)(module_core_mem
+ (strtab - mod_base));
else
strtab_mem = (char *)(module_init_mem
+ (strtab - mod_init));
modules->sym_info = calloc(num_symtab, sizeof(struct symbol_info));
if (modules->sym_info == NULL) {
ERRMSG("Can't allocate memory to store sym info\n");
goto out;
}
/* symbols starts from 1 */
for (nsym = 1; nsym < num_symtab; nsym++) {
Elf32_Sym *sym32;
Elf64_Sym *sym64;
/*
* TODO:
* If case of ELF vmcore then the word size can be
* determined using flag_elf64_memory flag.
* But in case of kdump-compressed dump, kdump header
* does not carry word size info. May be in future
* this info will be available in kdump header.
* Until then, in order to make this logic work on both
* situation we depend on pointer_size that is
* extracted from vmlinux dwarf information.
*/
if ((get_pointer_size() * 8) == 64) {
sym64 = (Elf64_Sym *) (symtab_mem
+ (nsym * sizeof(Elf64_Sym)));
modules->sym_info[nsym].value =
(unsigned long long) sym64->st_value;
nameptr = strtab_mem + sym64->st_name;
} else {
sym32 = (Elf32_Sym *) (symtab_mem
+ (nsym * sizeof(Elf32_Sym)));
modules->sym_info[nsym].value =
(unsigned long long) sym32->st_value;
nameptr = strtab_mem + sym32->st_name;
}
if (strlen(nameptr))
modules->sym_info[nsym].name = strdup(nameptr);
DEBUG_MSG("\t[%d] %llx %s\n", nsym,
modules->sym_info[nsym].value, nameptr);
}
ret = TRUE;
out:
free(module_struct_mem);
free(module_core_mem);
free(module_init_mem);
return ret;
}
static int
load_module_symbols(void)
{
unsigned long head, cur, cur_module;
struct module_info *modules = NULL;
unsigned int i = 0;
head = SYMBOL(modules);
if (!get_num_modules(head, &mod_st.num_modules) ||
!mod_st.num_modules) {
ERRMSG("Can't get module count\n");
return FALSE;
}
mod_st.modules = calloc(mod_st.num_modules,
sizeof(struct module_info));
if (!mod_st.modules) {
ERRMSG("Can't allocate memory for module info\n");
return FALSE;
}
modules = mod_st.modules;
if (!readmem(VADDR, head + OFFSET(list_head.next), &cur, sizeof cur)) {
ERRMSG("Can't get next list_head.\n");
return FALSE;
}
/* Travese the list and read module symbols */
while (cur != head) {
cur_module = cur - OFFSET(module.list);
if (!__load_module_symbol(&modules[i], cur_module))
return FALSE;
if (!readmem(VADDR, cur + OFFSET(list_head.next),
&cur, sizeof cur)) {
ERRMSG("Can't get next list_head.\n");
return FALSE;
}
i++;
}
return TRUE;
}
static void
free_config_entry(struct config_entry *ce)
{
struct config_entry *p;
while(ce) {
p = ce;
ce = p->next;
if (p->name)
free(p->name);
if (p->type_name)
free(p->type_name);
if (p->symbol_expr)
free(p->symbol_expr);
free(p);
}
}
static void
free_config(struct config *config)
{
int i;
if (config == NULL)
return;
if (config->module_name)
free(config->module_name);
for (i = 0; i < config->num_filter_symbols; i++) {
if (config->filter_symbol[i])
free_config_entry(config->filter_symbol[i]);
if (config->size_symbol[i])
free_config_entry(config->size_symbol[i]);
}
if (config->filter_symbol)
free(config->filter_symbol);
if (config->size_symbol)
free(config->size_symbol);
free(config);
}
static void
print_config_entry(struct config_entry *ce)
{
while (ce) {
DEBUG_MSG("Name: %s\n", ce->name);
DEBUG_MSG("Type Name: %s, ", ce->type_name);
DEBUG_MSG("flag: %x, ", ce->flag);
DEBUG_MSG("Type flag: %lx, ", ce->type_flag);
DEBUG_MSG("sym_addr: %llx, ", ce->sym_addr);
DEBUG_MSG("vaddr: %lx, ", ce->vaddr);
DEBUG_MSG("offset: %llx, ", (unsigned long long)ce->offset);
DEBUG_MSG("size: %ld\n", ce->size);
ce = ce->next;
}
}
/*
* Read the non-terminal's which are in the form of <Symbol>[.member[...]]
*/
static struct config_entry *
create_config_entry(const char *token, unsigned short flag, int line)
{
struct config_entry *ce = NULL, *ptr, *prev_ce;
char *str, *cur, *next;
long len;
int depth = 0;
if (!token)
return NULL;
cur = str = strdup(token);
prev_ce = ptr = NULL;
while (cur != NULL) {
if ((next = strchr(cur, '.')) != NULL) {
*next++ = '\0';
}
if (!strlen(cur)) {
cur = next;
continue;
}
if ((ptr = calloc(1, sizeof(struct config_entry))) == NULL) {
ERRMSG("Can't allocate memory for config_entry\n");
goto err_out;
}
ptr->line = line;
ptr->flag |= flag;
if (depth == 0) {
/* First node is always a symbol name */
ptr->flag |= SYMBOL_ENTRY;
}
if (flag & ITERATION_ENTRY) {
/* Max depth for iteration entry is 1 */
if (depth > 0) {
ERRMSG("Config error at %d: Invalid iteration "
"variable entry.\n", line);
goto err_out;
}
ptr->name = strdup(cur);
}
if (flag & (FILTER_ENTRY | LIST_ENTRY)) {
ptr->name = strdup(cur);
}
if (flag & SIZE_ENTRY) {
char ch = '\0';
int n = 0;
/* See if absolute length is provided */
if ((depth == 0) &&
((n = sscanf(cur, "%ld%c", &len, &ch)) > 0)) {
if (len < 0) {
ERRMSG("Config error at %d: size "
"value must be positive.\n",
line);
goto err_out;
}
ptr->size = len;
ptr->flag |= ENTRY_RESOLVED;
if (n == 2) {
/* Handle suffix.
* K = Kilobytes
* M = Megabytes
*/
switch (ch) {
case 'M':
case 'm':
ptr->size *= 1024;
case 'K':
case 'k':
ptr->size *= 1024;
break;
}
}
}
else
ptr->name = strdup(cur);
}
if (prev_ce) {
prev_ce->next = ptr;
prev_ce = ptr;
} else
ce = prev_ce = ptr;
cur = next;
ptr = NULL;
depth++;
}
free(str);
return ce;
err_out:
if (ce)
free_config_entry(ce);
if (ptr)
free_config_entry(ptr);
free(str);
return NULL;
}
static int
is_module_loaded(char *mod_name)
{
if (!strcmp(mod_name, "vmlinux") || get_loaded_module(mod_name))
return TRUE;
return FALSE;
}
/*
* read filter config file and return each string token. If the parameter
* expected_token is non-NULL, then return the current token if it matches
* with expected_token otherwise save the current token and return NULL.
* At start of every module section filter_config.new_section is set to 1 and
* subsequent function invocations return NULL untill filter_config.new_section
* is reset to 0 by passing @flag = CONFIG_NEW_CMD (0x02).
*
* Parameters:
* @expected_token INPUT
* Token string to match with currnet token.
* =NULL - return the current available token.
*
* @flag INPUT
* =0x01 - Skip to next module section.
* =0x02 - Treat the next token as next filter command and reset.
*
* @line OUTPUT
* Line number of current token in filter config file.
*
* @cur_mod OUTPUT
* Points to current module section name on non-NULL return value.
*
* @eof OUTPUT
* set to -1 when end of file is reached.
* set to -2 when end of section is reached.
*/
#define NOT_REACH_END (0)
#define REACH_END_OF_FILE (-1)
#define REACH_END_OF_SECTION (-2)
static char *
get_config_token(char *expected_token, unsigned char flag, int *line,
char **cur_mod, int *eof)
{
char *p;
struct filter_config *fc = &filter_config;
int skip = flag & CONFIG_SKIP_SECTION;
if (!fc->file_filterconfig)
return NULL;
if (eof)
*eof = NOT_REACH_END;
/*
* set token and saved_token to NULL if skip module section is set
* to 1.
*/
if (skip) {
fc->token = NULL;
fc->saved_token = NULL;
} else if (fc->saved_token) {
fc->token = fc->saved_token;
fc->saved_token = NULL;
} else if (fc->token)
fc->token = strtok(NULL, " ");
/* Read next line if we are done all tokens from previous line */
while (!fc->token && fgets(config_buf, sizeof(config_buf),
fc->file_filterconfig)) {
if ((p = strchr(config_buf, '\n'))) {
*p = '\0';
fc->line_count++;
}
if ((p = strchr(config_buf, '#'))) {
*p = '\0';
}
/* replace all tabs with spaces */
for (p = config_buf; *p != '\0'; p++)
if (*p == '\t')
*p = ' ';
if (config_buf[0] == '[') {
/* module section entry */
p = strchr(config_buf, ']');
if (!p) {
ERRMSG("Config error at %d: Invalid module "
"section entry.\n", fc->line_count);
/* skip to next valid module section */
skip = 1;
} else {
/*
* Found the valid module section. Reset the
* skip flag.
*/
*p = '\0';
if (fc->cur_module)
free(fc->cur_module);
fc->cur_module = strdup(&config_buf[1]);
fc->new_section = 1;
skip = 0;
}
continue;
}
/*
* If symbol info for current module is not loaded then
* skip to next module section.
*/
if (skip ||
(fc->cur_module && !is_module_loaded(fc->cur_module)))
continue;
fc->token = strtok(config_buf, " ");
}
if (!fc->token) {
if (eof)
*eof = REACH_END_OF_FILE;
return NULL;
}
if (fc->new_section && !(flag & CONFIG_NEW_CMD)) {
fc->saved_token = fc->token;
if (eof)
*eof = REACH_END_OF_SECTION;
return NULL;
}
fc->new_section = 0;
if (cur_mod)
*cur_mod = fc->cur_module;
if (line)
*line = fc->line_count;
if (expected_token && strcmp(fc->token, expected_token)) {
fc->saved_token = fc->token;
return NULL;
}
return fc->token;
}
static int
read_size_entry(struct config *config, int line, int idx)
{
char *token = get_config_token(NULL, 0, &line, NULL, NULL);
if (!token || IS_KEYWORD(token)) {
ERRMSG("Config error at %d: expected size symbol after"
" 'size' keyword.\n", line);
return FALSE;
}
config->size_symbol[idx] = create_config_entry(token, SIZE_ENTRY, line);
if (!config->size_symbol[idx]) {
ERRMSG("Error at line %d: Failed to read size symbol\n",
line);
return FALSE;
}
if (config->iter_entry && config->size_symbol[idx]->name &&
(!strcmp(config->size_symbol[idx]->name,
config->iter_entry->name))) {
config->size_symbol[idx]->flag &= ~SYMBOL_ENTRY;
config->size_symbol[idx]->flag |= VAR_ENTRY;
config->size_symbol[idx]->refer_to = config->iter_entry;
}
return TRUE;
}
/*
* Read erase command entry. The erase command syntax is:
*
* erase <Symbol>[.member[...]] [size <SizeValue>[K|M]]
* erase <Symbol>[.member[...]] [size <SizeSymbol>]
* erase <Symbol>[.member[...]] [nullify]
*/
static int
read_erase_cmd_entry(struct config *config, int line)
{
int size, idx;
char *token = get_config_token(NULL, 0, &line, NULL, NULL);
if (!token || IS_KEYWORD(token)) {
ERRMSG("Config error at %d: expected kernel symbol after"
" 'erase' command.\n", line);
return FALSE;
}
idx = config->num_filter_symbols;
config->num_filter_symbols++;
size = config->num_filter_symbols * sizeof(struct config_entry *);
config->filter_symbol = realloc(config->filter_symbol, size);
config->size_symbol = realloc(config->size_symbol, size);
if (!config->filter_symbol || !config->size_symbol) {
ERRMSG("Can't get memory to read config symbols.\n");
return FALSE;
}
config->filter_symbol[idx] = NULL;
config->size_symbol[idx] = NULL;
config->filter_symbol[idx] =
create_config_entry(token, FILTER_ENTRY, line);
if (!config->filter_symbol[idx]) {
ERRMSG("Error at line %d: Failed to read filter symbol\n",
line);
return FALSE;
}
/*
* Save the symbol expression string for generation of eraseinfo data
* later while writing dumpfile.
*/
config->filter_symbol[idx]->symbol_expr = strdup(token);
if (config->iter_entry) {
if (strcmp(config->filter_symbol[idx]->name,
config->iter_entry->name)) {
ERRMSG("Config error at %d: unused iteration"
" variable '%s'.\n", line,
config->iter_entry->name);
return FALSE;
}
config->filter_symbol[idx]->flag &= ~SYMBOL_ENTRY;
config->filter_symbol[idx]->flag |= VAR_ENTRY;
config->filter_symbol[idx]->refer_to = config->iter_entry;
}
if (get_config_token("nullify", 0, &line, NULL, NULL)) {
config->filter_symbol[idx]->nullify = 1;
} else if (get_config_token("size", 0, &line, NULL, NULL)) {
if (!read_size_entry(config, line, idx))
return FALSE;
}
return TRUE;
}
static int
add_traversal_entry(struct config_entry *ce, char *member, int line)
{
if (!ce)
return FALSE;
while (ce->next)
ce = ce->next;
ce->next = create_config_entry(member, LIST_ENTRY, line);
if (ce->next == NULL) {
ERRMSG("Error at line %d: Failed to read 'via' member\n",
line);
return FALSE;
}
ce->next->flag |= TRAVERSAL_ENTRY;
ce->next->flag &= ~SYMBOL_ENTRY;
return TRUE;
}
static int
read_list_entry(struct config *config, int line)
{
char *token = get_config_token(NULL, 0, &line, NULL, NULL);
if (!token || IS_KEYWORD(token)) {
ERRMSG("Config error at %d: expected list symbol after"
" 'in' keyword.\n", line);
return FALSE;
}
config->list_entry = create_config_entry(token, LIST_ENTRY, line);
if (!config->list_entry) {
ERRMSG("Error at line %d: Failed to read list symbol\n",
line);
return FALSE;
}
/* Check if user has provided 'via' or 'within' keyword */
if (get_config_token("via", 0, &line, NULL, NULL)) {
/* next token is traversal member NextMember */
token = get_config_token(NULL, 0, &line, NULL, NULL);
if (!token) {
ERRMSG("Config error at %d: expected member name after"
" 'via' keyword.\n", line);
return FALSE;
}
if (!add_traversal_entry(config->list_entry, token, line))
return FALSE;
}
else if (get_config_token("within", 0, &line, NULL, NULL)) {
char *s_name, *lh_member;
/* next value is StructName:ListHeadMember */
s_name = get_config_token(NULL, 0, &line, NULL, NULL);
if (!s_name || IS_KEYWORD(s_name)) {
ERRMSG("Config error at %d: expected struct name after"
" 'within' keyword.\n", line);
return FALSE;
}
lh_member = strchr(s_name, ':');
if (lh_member) {
*lh_member++ = '\0';
if (!strlen(lh_member)) {
ERRMSG("Config error at %d: expected list_head"
" member after ':'.\n", line);
return FALSE;
}
config->iter_entry->next =
create_config_entry(lh_member,
ITERATION_ENTRY, line);
if (!config->iter_entry->next)
return FALSE;
config->iter_entry->next->flag &= ~SYMBOL_ENTRY;
}
if (!strlen(s_name)) {
ERRMSG("Config error at %d: Invalid token found "
"after 'within' keyword.\n", line);
return FALSE;
}
config->iter_entry->type_name = strdup(s_name);
}
return TRUE;
}
/*
* Read the iteration entry (LoopConstruct). The syntax is:
*
* for <id> in {<ArrayVar> |
* <StructVar> via <NextMember> |
* <ListHeadVar> within <StructName>:<ListHeadMember>}
* erase <id>[.MemberExpression] [size <SizeExpression>|nullify]
* [erase <id>...]
* [...]
* endfor
*/
static int
read_iteration_entry(struct config *config, int line)
{
int eof = NOT_REACH_END;
char *token = get_config_token(NULL, 0, &line, NULL, NULL);
if (!token || IS_KEYWORD(token)) {
ERRMSG("Config error at %d: expected iteration VAR entry after"
" 'for' keyword.\n", line);
return FALSE;
}
config->iter_entry =
create_config_entry(token, ITERATION_ENTRY, line);
if (!config->iter_entry) {
ERRMSG("Error at line %d: "
"Failed to read iteration VAR entry.\n", line);
return FALSE;
}
if (!get_config_token("in", 0, &line, NULL, NULL)) {
char *token;
token = get_config_token(NULL, 0, &line, NULL, NULL);
if (token)
ERRMSG("Config error at %d: Invalid token '%s'.\n",
line, token);
ERRMSG("Config error at %d: expected token 'in'.\n", line);
return FALSE;
}
if (!read_list_entry(config, line))
return FALSE;
while (!get_config_token("endfor", 0, &line, NULL, &eof) && !eof) {
if (get_config_token("erase", 0, &line, NULL, NULL)) {
if (!read_erase_cmd_entry(config, line))
return FALSE;
} else {
token = get_config_token(NULL, 0, &line, NULL, NULL);
ERRMSG("Config error at %d: "
"Invalid token '%s'.\n", line, token);
return FALSE;
}
}
if (eof != NOT_REACH_END) {
ERRMSG("Config error at %d: No matching 'endfor' found.\n",
line);
return FALSE;
}
return TRUE;
}
/*
* Configuration file 'makedumpfile.conf' contains filter commands.
* Every individual filter command is considered as a config entry.
* A config entry can be provided on a single line or multiple lines.
*/
static struct config *
get_config(int skip)
{
struct config *config;
char *token = NULL;
static int line_count = 0;
char *cur_module = NULL;
int eof = NOT_REACH_END;