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authorLinus Torvalds <torvalds@linux-foundation.org>2022-10-10 21:00:45 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2022-10-10 21:00:45 +0200
commit8afc66e8d43be8edcf442165b70d50dd33091e68 (patch)
tree7e39a0a1f32b0d46acdac06c6ec515402ac9f583 /scripts/kallsyms.c
parentMerge tag 'livepatching-for-6.1' of git://git.kernel.org/pub/scm/linux/kernel... (diff)
parentdocs: bump minimal GNU Make version to 3.82 (diff)
downloadlinux-8afc66e8d43be8edcf442165b70d50dd33091e68.tar.xz
linux-8afc66e8d43be8edcf442165b70d50dd33091e68.zip
Merge tag 'kbuild-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada: - Remove potentially incomplete targets when Kbuid is interrupted by SIGINT etc in case GNU Make may miss to do that when stderr is piped to another program. - Rewrite the single target build so it works more correctly. - Fix rpm-pkg builds with V=1. - List top-level subdirectories in ./Kbuild. - Ignore auto-generated __kstrtab_* and __kstrtabns_* symbols in kallsyms. - Avoid two different modules in lib/zstd/ having shared code, which potentially causes building the common code as build-in and modular back-and-forth. - Unify two modpost invocations to optimize the build process. - Remove head-y syntax in favor of linker scripts for placing particular sections in the head of vmlinux. - Bump the minimal GNU Make version to 3.82. - Clean up misc Makefiles and scripts. * tag 'kbuild-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (41 commits) docs: bump minimal GNU Make version to 3.82 ia64: simplify esi object addition in Makefile Revert "kbuild: Check if linker supports the -X option" kbuild: rebuild .vmlinux.export.o when its prerequisite is updated kbuild: move modules.builtin(.modinfo) rules to Makefile.vmlinux_o zstd: Fixing mixed module-builtin objects kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols kallsyms: take the input file instead of reading stdin kallsyms: drop duplicated ignore patterns from kallsyms.c kbuild: reuse mksysmap output for kallsyms mksysmap: update comment about __crc_* kbuild: remove head-y syntax kbuild: use obj-y instead extra-y for objects placed at the head kbuild: hide error checker logs for V=1 builds kbuild: re-run modpost when it is updated kbuild: unify two modpost invocations kbuild: move vmlinux.o rule to the top Makefile kbuild: move .vmlinux.objs rule to Makefile.modpost kbuild: list sub-directories in ./Kbuild Makefile.compiler: replace cc-ifversion with compiler-specific macros ...
Diffstat (limited to 'scripts/kallsyms.c')
-rw-r--r--scripts/kallsyms.c54
1 files changed, 33 insertions, 21 deletions
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index ff5e7810e437..03fa07ad45d9 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -18,6 +18,7 @@
*
*/
+#include <getopt.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
@@ -87,7 +88,7 @@ static unsigned char best_table_len[256];
static void usage(void)
{
fprintf(stderr, "Usage: kallsyms [--all-symbols] [--absolute-percpu] "
- "[--base-relative] < in.map > out.S\n");
+ "[--base-relative] in.map > out.S\n");
exit(1);
}
@@ -123,9 +124,6 @@ static bool is_ignored_symbol(const char *name, char type)
/* Symbol names that begin with the following are ignored.*/
static const char * const ignored_prefixes[] = {
- "$", /* local symbols for ARM, MIPS, etc. */
- ".L", /* local labels, .LBB,.Ltmpxxx,.L__unnamed_xx,.LASANPC, etc. */
- "__crc_", /* modversions */
"__efistub_", /* arm64 EFI stub namespace */
"__kvm_nvhe_$", /* arm64 local symbols in non-VHE KVM namespace */
"__kvm_nvhe_.L", /* arm64 local symbols in non-VHE KVM namespace */
@@ -330,12 +328,19 @@ static void shrink_table(void)
}
}
-static void read_map(FILE *in)
+static void read_map(const char *in)
{
+ FILE *fp;
struct sym_entry *sym;
- while (!feof(in)) {
- sym = read_symbol(in);
+ fp = fopen(in, "r");
+ if (!fp) {
+ perror(in);
+ exit(1);
+ }
+
+ while (!feof(fp)) {
+ sym = read_symbol(fp);
if (!sym)
continue;
@@ -346,12 +351,15 @@ static void read_map(FILE *in)
table = realloc(table, sizeof(*table) * table_size);
if (!table) {
fprintf(stderr, "out of memory\n");
+ fclose(fp);
exit (1);
}
}
table[table_cnt++] = sym;
}
+
+ fclose(fp);
}
static void output_label(const char *label)
@@ -805,22 +813,26 @@ static void record_relative_base(void)
int main(int argc, char **argv)
{
- if (argc >= 2) {
- int i;
- for (i = 1; i < argc; i++) {
- if(strcmp(argv[i], "--all-symbols") == 0)
- all_symbols = 1;
- else if (strcmp(argv[i], "--absolute-percpu") == 0)
- absolute_percpu = 1;
- else if (strcmp(argv[i], "--base-relative") == 0)
- base_relative = 1;
- else
- usage();
- }
- } else if (argc != 1)
+ while (1) {
+ static struct option long_options[] = {
+ {"all-symbols", no_argument, &all_symbols, 1},
+ {"absolute-percpu", no_argument, &absolute_percpu, 1},
+ {"base-relative", no_argument, &base_relative, 1},
+ {},
+ };
+
+ int c = getopt_long(argc, argv, "", long_options, NULL);
+
+ if (c == -1)
+ break;
+ if (c != 0)
+ usage();
+ }
+
+ if (optind >= argc)
usage();
- read_map(stdin);
+ read_map(argv[optind]);
shrink_table();
if (absolute_percpu)
make_percpus_absolute();