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-rw-r--r--target/linux/generic/patches-4.1/203-kallsyms_uncompressed.patch108
1 files changed, 108 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.1/203-kallsyms_uncompressed.patch b/target/linux/generic/patches-4.1/203-kallsyms_uncompressed.patch
new file mode 100644
index 0000000000..10cfc83d78
--- /dev/null
+++ b/target/linux/generic/patches-4.1/203-kallsyms_uncompressed.patch
@@ -0,0 +1,108 @@
+--- 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 = 0;
++static int uncompressed = 0;
+ static int absolute_percpu = 0;
+ static char symbol_prefix_char = '\0';
+ static unsigned long long kernel_start_addr = 0;
+@@ -403,6 +404,9 @@ static void write_src(void)
+
+ free(markers);
+
++ if (uncompressed)
++ return;
++
+ output_label("kallsyms_token_table");
+ off = 0;
+ for (i = 0; i < 256; i++) {
+@@ -461,6 +465,9 @@ 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];
+@@ -533,6 +540,9 @@ 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--) {
+@@ -703,7 +713,9 @@ int main(int argc, char **argv)
+ } else if (strncmp(argv[i], "--page-offset=", 14) == 0) {
+ const char *p = &argv[i][14];
+ kernel_start_addr = strtoull(p, NULL, 16);
+- } else
++ } else if (strcmp(argv[i], "--uncompressed") == 0)
++ uncompressed = 1;
++ else
+ usage();
+ }
+ } else if (argc != 1)
+--- a/init/Kconfig
++++ b/init/Kconfig
+@@ -1334,6 +1334,17 @@ 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
+@@ -90,6 +90,10 @@ kallsyms()
+ kallsymopt="${kallsymopt} --absolute-percpu"
+ fi
+
++ if [ -n "${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
+@@ -109,6 +109,11 @@ 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++;
+@@ -141,6 +146,9 @@ 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.