mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 22:23:27 +00:00
3a187fa718
Also add a new kconfig symbol (CONFIG_KCMP) to the generic config, disabling the SYS_kcmp syscall (it was split from CONFIG_CHECKPOINT_RESTORE, which is disabled by default, so the previous behaviour is kept). Removed (upstreamed) patches: 070-net-icmp-pass-zeroed-opts-from-icmp-v6-_ndo_send-bef.patch 081-wireguard-device-do-not-generate-ICMP-for-non-IP-pac.patch 082-wireguard-queueing-get-rid-of-per-peer-ring-buffers.patch 083-wireguard-kconfig-use-arm-chacha-even-with-no-neon.patch 830-v5.12-0002-usb-serial-option-update-interface-mapping-for-ZTE-P685M.patch Manually rebased patches: 313-helios4-dts-status-led-alias.patch 104-powerpc-mpc85xx-change-P2020RDB-dts-file-for-OpenWRT.patch Run tested: ath79 (TL-WDR3600) mvebu (Turris Omnia) Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
120 lines
3.3 KiB
Diff
120 lines
3.3 KiB
Diff
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
|
|
@@ -1385,6 +1385,17 @@ 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}
|
|
}
|