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authorAnsuel Smith <ansuelsmth@gmail.com>2021-11-04 21:52:43 +0100
committerDaniel Golle <daniel@makrotopia.org>2022-03-27 00:07:34 +0000
commit9a038e7fd12eae3695875232962f96af8252f3ba (patch)
tree3ac43d08d68ead1856e271791f5f5ba75f555e95 /target/linux/generic/pending-5.15/203-kallsyms_uncompressed.patch
parent13960fb0e0babcd99530fcb234073af0c0a5e2f5 (diff)
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generic: 5.15: copy config and patch from 5.10
Copy config and patches from kernel 5.10 to kernel 5.15 Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Diffstat (limited to 'target/linux/generic/pending-5.15/203-kallsyms_uncompressed.patch')
-rw-r--r--target/linux/generic/pending-5.15/203-kallsyms_uncompressed.patch119
1 files changed, 119 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.15/203-kallsyms_uncompressed.patch b/target/linux/generic/pending-5.15/203-kallsyms_uncompressed.patch
new file mode 100644
index 0000000000..348a5afa3d
--- /dev/null
+++ b/target/linux/generic/pending-5.15/203-kallsyms_uncompressed.patch
@@ -0,0 +1,119 @@
+From: Felix Fietkau <nbd@nbd.name>
+Subject: kernel: add a config option for keeping the kallsyms table uncompressed, saving ~9kb kernel size after lzma on ar71xx
+
+[john@phrozen.org: added to my upstream queue 30.12.2016]
+lede-commit: e0e3509b5ce2ccf93d4d67ea907613f5f7ec2eed
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ init/Kconfig | 11 +++++++++++
+ kernel/kallsyms.c | 8 ++++++++
+ scripts/kallsyms.c | 12 ++++++++++++
+ scripts/link-vmlinux.sh | 4 ++++
+ 4 files changed, 35 insertions(+)
+
+--- a/init/Kconfig
++++ b/init/Kconfig
+@@ -1384,6 +1384,17 @@ config SYSCTL_ARCH_UNALIGN_ALLOW
+ the unaligned access emulation.
+ see arch/parisc/kernel/unaligned.c for reference
+
++config KALLSYMS_UNCOMPRESSED
++ bool "Keep kallsyms uncompressed"
++ depends on KALLSYMS
++ help
++ Normally kallsyms contains compressed symbols (using a token table),
++ reducing the uncompressed kernel image size. Keeping the symbol table
++ uncompressed significantly improves the size of this part in compressed
++ kernel images.
++
++ Say N unless you need compressed kernel images to be small.
++
+ config HAVE_PCSPKR_PLATFORM
+ bool
+
+--- a/kernel/kallsyms.c
++++ b/kernel/kallsyms.c
+@@ -77,6 +77,11 @@ static unsigned int kallsyms_expand_symb
+ * For every byte on the compressed symbol data, copy the table
+ * entry for that byte.
+ */
++#ifdef CONFIG_KALLSYMS_UNCOMPRESSED
++ memcpy(result, data + 1, len - 1);
++ result += len - 1;
++ len = 0;
++#endif
+ while (len) {
+ tptr = &kallsyms_token_table[kallsyms_token_index[*data]];
+ data++;
+@@ -109,6 +114,9 @@ tail:
+ */
+ static char kallsyms_get_symbol_type(unsigned int off)
+ {
++#ifdef CONFIG_KALLSYMS_UNCOMPRESSED
++ return kallsyms_names[off + 1];
++#endif
+ /*
+ * Get just the first code, look it up in the token table,
+ * and return the first char from this token.
+--- a/scripts/kallsyms.c
++++ b/scripts/kallsyms.c
+@@ -58,6 +58,7 @@ static struct addr_range percpu_range =
+ static struct sym_entry **table;
+ static unsigned int table_size, table_cnt;
+ static int all_symbols;
++static int uncompressed;
+ static int absolute_percpu;
+ static int base_relative;
+
+@@ -486,6 +487,9 @@ static void write_src(void)
+
+ free(markers);
+
++ if (uncompressed)
++ return;
++
+ output_label("kallsyms_token_table");
+ off = 0;
+ for (i = 0; i < 256; i++) {
+@@ -537,6 +541,9 @@ static unsigned char *find_token(unsigne
+ {
+ int i;
+
++ if (uncompressed)
++ return NULL;
++
+ for (i = 0; i < len - 1; i++) {
+ if (str[i] == token[0] && str[i+1] == token[1])
+ return &str[i];
+@@ -609,6 +616,9 @@ static void optimize_result(void)
+ {
+ int i, best;
+
++ if (uncompressed)
++ return;
++
+ /* using the '\0' symbol last allows compress_symbols to use standard
+ * fast string functions */
+ for (i = 255; i >= 0; i--) {
+@@ -773,6 +783,8 @@ int main(int argc, char **argv)
+ absolute_percpu = 1;
+ else if (strcmp(argv[i], "--base-relative") == 0)
+ base_relative = 1;
++ else if (strcmp(argv[i], "--uncompressed") == 0)
++ uncompressed = 1;
+ else
+ usage();
+ }
+--- a/scripts/link-vmlinux.sh
++++ b/scripts/link-vmlinux.sh
+@@ -186,6 +186,10 @@ kallsyms()
+ kallsymopt="${kallsymopt} --base-relative"
+ fi
+
++ if [ -n "${CONFIG_KALLSYMS_UNCOMPRESSED}" ]; then
++ kallsymopt="${kallsymopt} --uncompressed"
++ fi
++
+ info KSYMS ${2}
+ ${NM} -n ${1} | scripts/kallsyms ${kallsymopt} > ${2}
+ }