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kallsyms: generalize text region handling

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Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Mike Frysinger 2009-06-08 19:12:13 -04:00 committed by Sam Ravnborg
parent 028f042613
commit 17b1f0de79
1 changed files with 61 additions and 26 deletions
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87
scripts/kallsyms.c
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@ -23,6 +23,10 @@
#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 {
@ -32,10 +36,23 @@ 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 unsigned long long _stext_l1, _etext_l1, _stext_l2, _etext_l2;
static int all_symbols = 0;
static char symbol_prefix_char = '\0';
@ -62,6 +79,26 @@ static inline int is_arm_mapping_symbol(const char *str)
&& (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];
@ -85,22 +122,8 @@ static int read_symbol(FILE *in, struct sym_entry *s)
/* 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 (strcmp(sym, "_stext_l1") == 0)
_stext_l1 = s->addr;
else if (strcmp(sym, "_etext_l1") == 0)
_etext_l1 = s->addr;
else if (strcmp(sym, "_stext_l2") == 0)
_stext_l2 = s->addr;
else if (strcmp(sym, "_etext_l2") == 0)
_etext_l2 = s->addr;
else if (read_symbol_tr(sym, s->addr) == 0)
/* nothing to do */;
else if (toupper(stype) == 'A')
{
/* Keep these useful absolute symbols */
@ -136,6 +159,21 @@ static int read_symbol(FILE *in, struct sym_entry *s)
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 0;
}
return 1;
}
static int symbol_valid(struct sym_entry *s)
{
/* Symbols which vary between passes. Passes 1 and 2 must have
@ -165,10 +203,7 @@ static int symbol_valid(struct sym_entry *s)
/* 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)
&& (s->addr < _stext_l1 || s->addr > _etext_l1)
&& (s->addr < _stext_l2 || s->addr > _etext_l2))
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
@ -176,10 +211,10 @@ static int symbol_valid(struct sym_entry *s)
* 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;
}