#include <string.h>
#include <ctype.h>
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
+#endif
+
#define KSYM_NAME_LEN 128
struct sym_entry {
unsigned char *sym;
};
+struct text_range {
+ const char *stext, *etext;
+ unsigned long long start, end;
+};
+
+static unsigned long long _text;
+static struct text_range text_ranges[] = {
+ { "_stext", "_etext" },
+ { "_sinittext", "_einittext" },
+ { "_stext_l1", "_etext_l1" }, /* Blackfin on-chip L1 inst SRAM */
+ { "_stext_l2", "_etext_l2" }, /* Blackfin on-chip L2 SRAM */
+};
+#define text_range_text (&text_ranges[0])
+#define text_range_inittext (&text_ranges[1])
+
static struct sym_entry *table;
static unsigned int table_size, table_cnt;
-static unsigned long long _text, _stext, _etext, _sinittext, _einittext;
static int all_symbols = 0;
static char symbol_prefix_char = '\0';
&& (str[2] == '\0' || str[2] == '.');
}
+static int read_symbol_tr(const char *sym, unsigned long long addr)
+{
+ size_t i;
+ struct text_range *tr;
+
+ for (i = 0; i < ARRAY_SIZE(text_ranges); ++i) {
+ tr = &text_ranges[i];
+
+ if (strcmp(sym, tr->stext) == 0) {
+ tr->start = addr;
+ return 0;
+ } else if (strcmp(sym, tr->etext) == 0) {
+ tr->end = addr;
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
static int read_symbol(FILE *in, struct sym_entry *s)
{
char str[500];
/* Ignore most absolute/undefined (?) symbols. */
if (strcmp(sym, "_text") == 0)
_text = s->addr;
- else if (strcmp(sym, "_stext") == 0)
- _stext = s->addr;
- else if (strcmp(sym, "_etext") == 0)
- _etext = s->addr;
- else if (strcmp(sym, "_sinittext") == 0)
- _sinittext = s->addr;
- else if (strcmp(sym, "_einittext") == 0)
- _einittext = s->addr;
+ else if (read_symbol_tr(sym, s->addr) == 0)
+ /* nothing to do */;
else if (toupper(stype) == 'A')
{
/* Keep these useful absolute symbols */
/* exclude also MIPS ELF local symbols ($L123 instead of .L123) */
else if (str[0] == '$')
return -1;
+ /* exclude debugging symbols */
+ else if (stype == 'N')
+ return -1;
/* include the type field in the symbol name, so that it gets
* compressed together */
return 0;
}
+static int symbol_valid_tr(struct sym_entry *s)
+{
+ size_t i;
+ struct text_range *tr;
+
+ for (i = 0; i < ARRAY_SIZE(text_ranges); ++i) {
+ tr = &text_ranges[i];
+
+ if (s->addr >= tr->start && s->addr <= tr->end)
+ return 1;
+ }
+
+ return 0;
+}
+
static int symbol_valid(struct sym_entry *s)
{
/* Symbols which vary between passes. Passes 1 and 2 must have
/* if --all-symbols is not specified, then symbols outside the text
* and inittext sections are discarded */
if (!all_symbols) {
- if ((s->addr < _stext || s->addr > _etext)
- && (s->addr < _sinittext || s->addr > _einittext))
+ if (symbol_valid_tr(s) == 0)
return 0;
/* Corner case. Discard any symbols with the same value as
* _etext _einittext; they can move between pass 1 and 2 when
* they may get dropped in pass 2, which breaks the kallsyms
* rules.
*/
- if ((s->addr == _etext &&
- strcmp((char *)s->sym + offset, "_etext")) ||
- (s->addr == _einittext &&
- strcmp((char *)s->sym + offset, "_einittext")))
+ if ((s->addr == text_range_text->end &&
+ strcmp((char *)s->sym + offset, text_range_text->etext)) ||
+ (s->addr == text_range_inittext->end &&
+ strcmp((char *)s->sym + offset, text_range_inittext->etext)))
return 0;
}
optimize_result();
}
+/* guess for "linker script provide" symbol */
+static int may_be_linker_script_provide_symbol(const struct sym_entry *se)
+{
+ const char *symbol = (char *)se->sym + 1;
+ int len = se->len - 1;
+
+ if (len < 8)
+ return 0;
+
+ if (symbol[0] != '_' || symbol[1] != '_')
+ return 0;
+
+ /* __start_XXXXX */
+ if (!memcmp(symbol + 2, "start_", 6))
+ return 1;
+
+ /* __stop_XXXXX */
+ if (!memcmp(symbol + 2, "stop_", 5))
+ return 1;
+
+ /* __end_XXXXX */
+ if (!memcmp(symbol + 2, "end_", 4))
+ return 1;
+
+ /* __XXXXX_start */
+ if (!memcmp(symbol + len - 6, "_start", 6))
+ return 1;
+
+ /* __XXXXX_end */
+ if (!memcmp(symbol + len - 4, "_end", 4))
+ return 1;
+
+ return 0;
+}
+
+static int prefix_underscores_count(const char *str)
+{
+ const char *tail = str;
+
+ while (*tail == '_')
+ tail++;
+
+ return tail - str;
+}
+
static int compare_symbols(const void *a, const void *b)
{
const struct sym_entry *sa;
if (wa != wb)
return wa - wb;
+ /* sort by "linker script provide" type */
+ wa = may_be_linker_script_provide_symbol(sa);
+ wb = may_be_linker_script_provide_symbol(sb);
+ if (wa != wb)
+ return wa - wb;
+
+ /* sort by the number of prefix underscores */
+ wa = prefix_underscores_count((const char *)sa->sym + 1);
+ wb = prefix_underscores_count((const char *)sb->sym + 1);
+ if (wa != wb)
+ return wa - wb;
+
/* sort by initial order, so that other symbols are left undisturbed */
return sa->start_pos - sb->start_pos;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff