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-rw-r--r--scripts/kallsyms.c94
1 files changed, 68 insertions, 26 deletions
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 090ffda4adb..d3d2e534105 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -67,8 +67,9 @@ struct sym_entry {
static struct sym_entry *table;
static int size, cnt;
-static unsigned long long _stext, _etext, _sinittext, _einittext;
+static unsigned long long _stext, _etext, _sinittext, _einittext, _sextratext, _eextratext;
static int all_symbols = 0;
+static char symbol_prefix_char = '\0';
struct token {
unsigned char data[MAX_TOK_SIZE];
@@ -93,7 +94,7 @@ unsigned char best_table_len[256];
static void
usage(void)
{
- fprintf(stderr, "Usage: kallsyms [--all-symbols] < in.map > out.S\n");
+ fprintf(stderr, "Usage: kallsyms [--all-symbols] [--symbol-prefix=<prefix char>] < in.map > out.S\n");
exit(1);
}
@@ -112,6 +113,7 @@ static int
read_symbol(FILE *in, struct sym_entry *s)
{
char str[500];
+ char *sym;
int rc;
rc = fscanf(in, "%llx %c %499s\n", &s->addr, &s->type, str);
@@ -123,27 +125,36 @@ read_symbol(FILE *in, struct sym_entry *s)
return -1;
}
+ sym = str;
+ /* skip prefix char */
+ if (symbol_prefix_char && str[0] == symbol_prefix_char)
+ sym++;
+
/* Ignore most absolute/undefined (?) symbols. */
- if (strcmp(str, "_stext") == 0)
+ if (strcmp(sym, "_stext") == 0)
_stext = s->addr;
- else if (strcmp(str, "_etext") == 0)
+ else if (strcmp(sym, "_etext") == 0)
_etext = s->addr;
- else if (strcmp(str, "_sinittext") == 0)
+ else if (strcmp(sym, "_sinittext") == 0)
_sinittext = s->addr;
- else if (strcmp(str, "_einittext") == 0)
+ else if (strcmp(sym, "_einittext") == 0)
_einittext = s->addr;
+ else if (strcmp(sym, "_sextratext") == 0)
+ _sextratext = s->addr;
+ else if (strcmp(sym, "_eextratext") == 0)
+ _eextratext = s->addr;
else if (toupper(s->type) == 'A')
{
/* Keep these useful absolute symbols */
- if (strcmp(str, "__kernel_syscall_via_break") &&
- strcmp(str, "__kernel_syscall_via_epc") &&
- strcmp(str, "__kernel_sigtramp") &&
- strcmp(str, "__gp"))
+ if (strcmp(sym, "__kernel_syscall_via_break") &&
+ strcmp(sym, "__kernel_syscall_via_epc") &&
+ strcmp(sym, "__kernel_sigtramp") &&
+ strcmp(sym, "__gp"))
return -1;
}
else if (toupper(s->type) == 'U' ||
- is_arm_mapping_symbol(str))
+ is_arm_mapping_symbol(sym))
return -1;
/* include the type field in the symbol name, so that it gets
@@ -177,30 +188,37 @@ symbol_valid(struct sym_entry *s)
"_SDA2_BASE_", /* ppc */
NULL };
int i;
+ int offset = 1;
+
+ /* skip prefix char */
+ if (symbol_prefix_char && *(s->sym + 1) == symbol_prefix_char)
+ offset++;
/* 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 < _sinittext || s->addr > _einittext)
+ && (s->addr < _sextratext || s->addr > _eextratext))
return 0;
/* Corner case. Discard any symbols with the same value as
- * _etext or _einittext, they can move between pass 1 and 2
- * when the kallsyms data is added. If these symbols move then
- * they may get dropped in pass 2, which breaks the kallsyms
- * rules.
+ * _etext _einittext or _eextratext; they can move between pass
+ * 1 and 2 when the kallsyms data are added. If these symbols
+ * move then they may get dropped in pass 2, which breaks the
+ * kallsyms rules.
*/
- if ((s->addr == _etext && strcmp(s->sym + 1, "_etext")) ||
- (s->addr == _einittext && strcmp(s->sym + 1, "_einittext")))
+ if ((s->addr == _etext && strcmp(s->sym + offset, "_etext")) ||
+ (s->addr == _einittext && strcmp(s->sym + offset, "_einittext")) ||
+ (s->addr == _eextratext && strcmp(s->sym + offset, "_eextratext")))
return 0;
}
/* Exclude symbols which vary between passes. */
- if (strstr(s->sym + 1, "_compiled."))
+ if (strstr(s->sym + offset, "_compiled."))
return 0;
for (i = 0; special_symbols[i]; i++)
- if( strcmp(s->sym + 1, special_symbols[i]) == 0 )
+ if( strcmp(s->sym + offset, special_symbols[i]) == 0 )
return 0;
return 1;
@@ -225,9 +243,15 @@ read_map(FILE *in)
static void output_label(char *label)
{
- printf(".globl %s\n",label);
+ if (symbol_prefix_char)
+ printf(".globl %c%s\n", symbol_prefix_char, label);
+ else
+ printf(".globl %s\n", label);
printf("\tALGN\n");
- printf("%s:\n",label);
+ if (symbol_prefix_char)
+ printf("%c%s:\n", symbol_prefix_char, label);
+ else
+ printf("%s:\n", label);
}
/* uncompress a compressed symbol. When this function is called, the best table
@@ -665,6 +689,13 @@ static void optimize_token_table(void)
insert_real_symbols_in_table();
+ /* When valid symbol is not registered, exit to error */
+ if (good_head.left == good_head.right &&
+ bad_head.left == bad_head.right) {
+ fprintf(stderr, "No valid symbol.\n");
+ exit(1);
+ }
+
optimize_result();
}
@@ -672,9 +703,21 @@ static void optimize_token_table(void)
int
main(int argc, char **argv)
{
- if (argc == 2 && strcmp(argv[1], "--all-symbols") == 0)
- all_symbols = 1;
- else if (argc != 1)
+ if (argc >= 2) {
+ int i;
+ for (i = 1; i < argc; i++) {
+ if(strcmp(argv[i], "--all-symbols") == 0)
+ all_symbols = 1;
+ else if (strncmp(argv[i], "--symbol-prefix=", 16) == 0) {
+ char *p = &argv[i][16];
+ /* skip quote */
+ if ((*p == '"' && *(p+2) == '"') || (*p == '\'' && *(p+2) == '\''))
+ p++;
+ symbol_prefix_char = *p;
+ } else
+ usage();
+ }
+ } else if (argc != 1)
usage();
read_map(stdin);
@@ -683,4 +726,3 @@ main(int argc, char **argv)
return 0;
}
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 23:05:56 +0000