From: Robert Marko <robimarko@gmail.com>
Date: Fri, 1 Mar 2024 13:15:15 +0000 (+0100)
Subject: generic: 6.6: fix uncompressed kallsyms
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=7acb8203c2e61d045c5129bb2c3df0b3a99d0f0b;p=openwrt%2Fstaging%2Fxback.git

generic: 6.6: fix uncompressed kallsyms

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>
---

diff --git a/target/linux/generic/pending-6.6/203-kallsyms_uncompressed.patch b/target/linux/generic/pending-6.6/203-kallsyms_uncompressed.patch
index d935077c05..c23811ed39 100644
--- a/target/linux/generic/pending-6.6/203-kallsyms_uncompressed.patch
+++ b/target/linux/generic/pending-6.6/203-kallsyms_uncompressed.patch
@@ -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},