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Code Issues

generic: 6.6: fix uncompressed kallsyms

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Currently, the existing uncompressed kallsym support is causing qualcommax
boards to hang on boot, and only after earlycon and verbose BUG() prints
are enabled the trace is visible:
[    0.000000] ------------[ cut here ]------------
[    0.000000] kernel BUG at kernel/kallsyms.c:340!
[    0.000000] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP

Felix has fixed up the uncompressed kallsyms support so modify the current
patch with the fix.
All credits for the code go to Felix.

Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Robert Marko 2024-03-01 14:15:15 +01:00
parent d356fb33c3
commit 7acb8203c2
1 changed files with 59 additions and 10 deletions
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69
target/linux/generic/pending-6.6/203-kallsyms_uncompressed.patch
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@ -65,17 +65,66 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
static int absolute_percpu;
static int base_relative;
static int lto_clang;
@@ -469,6 +470,9 @@ static void write_src(void)
@@ -453,13 +454,15 @@ static void write_src(void)
}
printf("\n");
- /*
- * Now that we wrote out the compressed symbol names, restore the
- * original names, which are needed in some of the later steps.
- */
- for (i = 0; i < table_cnt; i++) {
- expand_symbol(table[i]->sym, table[i]->len, buf);
- strcpy((char *)table[i]->sym, buf);
+ if (!uncompressed) {
+ /*
+ * Now that we wrote out the compressed symbol names, restore the
+ * original names, which are needed in some of the later steps.
+ */
+ for (i = 0; i < table_cnt; i++) {
+ expand_symbol(table[i]->sym, table[i]->len, buf);
+ strcpy((char *)table[i]->sym, buf);
+ }
}
output_label("kallsyms_markers");
@@ -469,20 +472,22 @@ static void write_src(void)
free(markers);
+ if (uncompressed)
+ return;
+
output_label("kallsyms_token_table");
off = 0;
for (i = 0; i < 256; i++) {
@@ -582,6 +586,9 @@ static unsigned char *find_token(unsigne
- output_label("kallsyms_token_table");
- off = 0;
- for (i = 0; i < 256; i++) {
- best_idx[i] = off;
- expand_symbol(best_table[i], best_table_len[i], buf);
- printf("\t.asciz\t\"%s\"\n", buf);
- off += strlen(buf) + 1;
- }
- printf("\n");
+ if (!uncompressed) {
+ output_label("kallsyms_token_table");
+ off = 0;
+ for (i = 0; i < 256; i++) {
+ best_idx[i] = off;
+ expand_symbol(best_table[i], best_table_len[i], buf);
+ printf("\t.asciz\t\"%s\"\n", buf);
+ off += strlen(buf) + 1;
+ }
+ printf("\n");
- output_label("kallsyms_token_index");
- for (i = 0; i < 256; i++)
- printf("\t.short\t%d\n", best_idx[i]);
- printf("\n");
+ output_label("kallsyms_token_index");
+ for (i = 0; i < 256; i++)
+ printf("\t.short\t%d\n", best_idx[i]);
+ printf("\n");
+ }
if (!base_relative)
output_label("kallsyms_addresses");
@@ -582,6 +587,9 @@ static unsigned char *find_token(unsigne
{
int i;
@ -85,7 +134,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
for (i = 0; i < len - 1; i++) {
if (str[i] == token[0] && str[i+1] == token[1])
return &str[i];
@@ -654,6 +661,9 @@ static void optimize_result(void)
@@ -654,6 +662,9 @@ static void optimize_result(void)
{
int i, best;
@ -95,7 +144,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
/* using the '\0' symbol last allows compress_symbols to use standard
* fast string functions */
for (i = 255; i >= 0; i--) {
@@ -815,6 +825,7 @@ int main(int argc, char **argv)
@@ -815,6 +826,7 @@ int main(int argc, char **argv)
{"absolute-percpu", no_argument, &absolute_percpu, 1},
{"base-relative", no_argument, &base_relative, 1},
{"lto-clang", no_argument, &lto_clang, 1},