109 lines
2.9 KiB
Diff
109 lines
2.9 KiB
Diff
--- a/scripts/kallsyms.c
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+++ b/scripts/kallsyms.c
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@@ -54,6 +54,7 @@ static struct text_range text_ranges[] =
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static struct sym_entry *table;
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static unsigned int table_size, table_cnt;
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static int all_symbols = 0;
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+static int uncompressed = 0;
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static char symbol_prefix_char = '\0';
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int token_profit[0x10000];
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@@ -360,6 +361,9 @@ static void write_src(void)
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free(markers);
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+ if (uncompressed)
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+ return;
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+
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output_label("kallsyms_token_table");
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off = 0;
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for (i = 0; i < 256; i++) {
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@@ -418,6 +422,9 @@ static void *find_token(unsigned char *s
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{
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int i;
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+ if (uncompressed)
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+ return NULL;
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+
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for (i = 0; i < len - 1; i++) {
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if (str[i] == token[0] && str[i+1] == token[1])
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return &str[i];
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@@ -490,6 +497,9 @@ static void optimize_result(void)
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{
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int i, best;
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+ if (uncompressed)
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+ return;
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+
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/* using the '\0' symbol last allows compress_symbols to use standard
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* fast string functions */
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for (i = 255; i >= 0; i--) {
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@@ -646,7 +656,9 @@ int main(int argc, char **argv)
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if ((*p == '"' && *(p+2) == '"') || (*p == '\'' && *(p+2) == '\''))
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p++;
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symbol_prefix_char = *p;
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- } else
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+ } else if (strcmp(argv[i], "--uncompressed") == 0)
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+ uncompressed = 1;
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+ else
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usage();
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}
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} else if (argc != 1)
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--- a/init/Kconfig
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+++ b/init/Kconfig
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@@ -1257,6 +1257,17 @@ config KALLSYMS_ALL
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Say N unless you really need all symbols.
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+config KALLSYMS_UNCOMPRESSED
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+ bool "Keep kallsyms uncompressed"
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+ depends on KALLSYMS
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+ help
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+ Normally kallsyms contains compressed symbols (using a token table),
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+ reducing the uncompressed kernel image size. Keeping the symbol table
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+ uncompressed significantly improves the size of this part in compressed
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+ kernel images.
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+
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+ Say N unless you need compressed kernel images to be small.
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+
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config HOTPLUG
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def_bool y
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--- a/scripts/link-vmlinux.sh
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+++ b/scripts/link-vmlinux.sh
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@@ -83,6 +83,10 @@ kallsyms()
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kallsymopt="${kallsymopt} --all-symbols"
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fi
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+ if [ -n "${CONFIG_KALLSYMS_UNCOMPRESSED}" ]; then
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+ kallsymopt="${kallsymopt} --uncompressed"
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+ fi
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+
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local aflags="${KBUILD_AFLAGS} ${KBUILD_AFLAGS_KERNEL} \
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${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS}"
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--- a/kernel/kallsyms.c
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+++ b/kernel/kallsyms.c
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@@ -106,6 +106,11 @@ static unsigned int kallsyms_expand_symb
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* For every byte on the compressed symbol data, copy the table
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* entry for that byte.
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*/
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+#ifdef CONFIG_KALLSYMS_UNCOMPRESSED
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+ memcpy(result, data + 1, len - 1);
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+ result += len - 1;
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+ len = 0;
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+#endif
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while (len) {
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tptr = &kallsyms_token_table[kallsyms_token_index[*data]];
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data++;
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@@ -133,6 +138,9 @@ static unsigned int kallsyms_expand_symb
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*/
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static char kallsyms_get_symbol_type(unsigned int off)
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{
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+#ifdef CONFIG_KALLSYMS_UNCOMPRESSED
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+ return kallsyms_names[off + 1];
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+#endif
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/*
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* Get just the first code, look it up in the token table,
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* and return the first char from this token.
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