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authorFelix Fietkau <nbd@nbd.name>2017-01-27 14:32:10 +0100
committerFelix Fietkau <nbd@nbd.name>2017-02-04 20:28:14 +0100
commitf791fb4af45032a653ba7c850f4564923871cb16 (patch)
treec1fc4e564c8e27faad582e5b55a9ce91816a241c /target/linux/generic/patches-4.9/203-kallsyms_uncompressed.patch
parent7d00cfe9bb693e376ac9d035e13f8ce8a5ff572c (diff)
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kernel: add linux 4.9 support
Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Tim Harvey <tharvey@gateworks.com> [fixes]
Diffstat (limited to 'target/linux/generic/patches-4.9/203-kallsyms_uncompressed.patch')
-rw-r--r--target/linux/generic/patches-4.9/203-kallsyms_uncompressed.patch106
1 files changed, 106 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.9/203-kallsyms_uncompressed.patch b/target/linux/generic/patches-4.9/203-kallsyms_uncompressed.patch
new file mode 100644
index 0000000..e3c9562
--- /dev/null
+++ b/target/linux/generic/patches-4.9/203-kallsyms_uncompressed.patch
@@ -0,0 +1,106 @@
+--- a/scripts/kallsyms.c
++++ b/scripts/kallsyms.c
+@@ -61,6 +61,7 @@ static struct addr_range percpu_range =
+ static struct sym_entry *table;
+ static unsigned int table_size, table_cnt;
+ static int all_symbols = 0;
++static int uncompressed = 0;
+ static int absolute_percpu = 0;
+ static char symbol_prefix_char = '\0';
+ static int base_relative = 0;
+@@ -446,6 +447,9 @@ static void write_src(void)
+
+ free(markers);
+
++ if (uncompressed)
++ return;
++
+ output_label("kallsyms_token_table");
+ off = 0;
+ for (i = 0; i < 256; i++) {
+@@ -504,6 +508,9 @@ static void *find_token(unsigned char *s
+ {
+ 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];
+@@ -576,6 +583,9 @@ 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--) {
+@@ -764,6 +774,8 @@ int main(int argc, char **argv)
+ symbol_prefix_char = *p;
+ } else if (strcmp(argv[i], "--base-relative") == 0)
+ base_relative = 1;
++ else if (strcmp(argv[i], "--uncompressed") == 0)
++ uncompressed = 1;
+ else
+ usage();
+ }
+--- a/init/Kconfig
++++ b/init/Kconfig
+@@ -1370,6 +1370,17 @@ 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/scripts/link-vmlinux.sh
++++ b/scripts/link-vmlinux.sh
+@@ -136,6 +136,10 @@ kallsyms()
+ kallsymopt="${kallsymopt} --base-relative"
+ fi
+
++ if [ -n "${CONFIG_KALLSYMS_UNCOMPRESSED}" ]; then
++ kallsymopt="${kallsymopt} --uncompressed"
++ fi
++
+ local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \
+ ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}"
+
+--- a/kernel/kallsyms.c
++++ b/kernel/kallsyms.c
+@@ -113,6 +113,11 @@ 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++;
+@@ -145,6 +150,9 @@ 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.