diff options
Diffstat (limited to 'nixos/modules/kernel-patches/0036-kernel-add-a-config-option-for-keeping-the-kallsyms-.patch')
| -rw-r--r-- | nixos/modules/kernel-patches/0036-kernel-add-a-config-option-for-keeping-the-kallsyms-.patch | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/nixos/modules/kernel-patches/0036-kernel-add-a-config-option-for-keeping-the-kallsyms-.patch b/nixos/modules/kernel-patches/0036-kernel-add-a-config-option-for-keeping-the-kallsyms-.patch deleted file mode 100644 index 4597baa..0000000 --- a/nixos/modules/kernel-patches/0036-kernel-add-a-config-option-for-keeping-the-kallsyms-.patch +++ /dev/null @@ -1,133 +0,0 @@ -From 0ef054c3e7d7423d0f18edd7a29f62a9c6a811b4 Mon Sep 17 00:00:00 2001 -From: Felix Fietkau <nbd@nbd.name> -Date: Tue, 27 Sep 2022 16:21:26 +0200 -Subject: [PATCH 36/96] 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(+) - -diff --git a/init/Kconfig b/init/Kconfig -index c7900e8975f1..4d5f1ee66139 100644 ---- a/init/Kconfig -+++ b/init/Kconfig -@@ -1475,6 +1475,17 @@ 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 - -diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c -index fbdf8d3279ac..f30ecfedd293 100644 ---- a/kernel/kallsyms.c -+++ b/kernel/kallsyms.c -@@ -81,6 +81,11 @@ static unsigned int kallsyms_expand_symbol(unsigned int off, - * 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++; -@@ -113,6 +118,9 @@ static unsigned int kallsyms_expand_symbol(unsigned int off, - */ - 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. -diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c -index f18e6dfc68c5..262a3799bae1 100644 ---- 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; - -@@ -487,6 +488,9 @@ static void write_src(void) - - free(markers); - -+ if (uncompressed) -+ return; -+ - output_label("kallsyms_token_table"); - off = 0; - for (i = 0; i < 256; i++) { -@@ -538,6 +542,9 @@ static unsigned char *find_token(unsigned char *str, int len, - { - 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]; -@@ -610,6 +617,9 @@ 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--) { -@@ -774,6 +784,8 @@ 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(); - } -diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh -index eecc1863e556..8b8c9000892a 100755 ---- a/scripts/link-vmlinux.sh -+++ b/scripts/link-vmlinux.sh -@@ -156,6 +156,10 @@ 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} - } --- -2.37.2 - |