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author | 2022-05-01 17:40:12 +0900 | |
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committer | 2022-05-08 03:17:00 +0900 | |
commit | 8a69152be9a8c1f7a02c6b8410b35c68cb200f6d (patch) | |
tree | db2e260b405d9f375efb06ba993a686f2e8be333 /scripts/mod/modpost.c | |
parent | modpost: add sym_add_unresolved() helper (diff) | |
download | linux-8a69152be9a8c1f7a02c6b8410b35c68cb200f6d.tar.gz linux-8a69152be9a8c1f7a02c6b8410b35c68cb200f6d.tar.bz2 linux-8a69152be9a8c1f7a02c6b8410b35c68cb200f6d.zip |
modpost: traverse unresolved symbols in order
Currently, modpost manages unresolved in a singly linked list; it adds
a new node to the head, and traverses the list from new to old.
Use a doubly linked list to keep the order in the symbol table in the
ELF file.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Diffstat (limited to 'scripts/mod/modpost.c')
-rw-r--r-- | scripts/mod/modpost.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 59d817692893..70a66ce9ffd9 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -185,6 +185,8 @@ static struct module *new_module(const char *modname) mod = NOFAIL(malloc(sizeof(*mod) + strlen(modname) + 1)); memset(mod, 0, sizeof(*mod)); + INIT_LIST_HEAD(&mod->unresolved_symbols); + strcpy(mod->name, modname); mod->is_vmlinux = (strcmp(modname, "vmlinux") == 0); @@ -207,6 +209,7 @@ static struct module *new_module(const char *modname) struct symbol { struct symbol *next; + struct list_head list; /* link to module::unresolved_symbols */ struct module *module; char *namespace; unsigned int crc; @@ -261,8 +264,12 @@ static struct symbol *new_symbol(const char *name, struct module *module, static void sym_add_unresolved(const char *name, struct module *mod, bool weak) { - mod->unres = alloc_symbol(name, mod->unres); - mod->unres->weak = weak; + struct symbol *sym; + + sym = alloc_symbol(name, NULL); + sym->weak = weak; + + list_add_tail(&sym->list, &mod->unresolved_symbols); } static struct symbol *find_symbol(const char *name) @@ -2156,7 +2163,7 @@ static void check_exports(struct module *mod) { struct symbol *s, *exp; - for (s = mod->unres; s; s = s->next) { + list_for_each_entry(s, &mod->unresolved_symbols, list) { const char *basename; exp = find_symbol(s->name); if (!exp) { @@ -2277,7 +2284,7 @@ static void add_versions(struct buffer *b, struct module *mod) buf_printf(b, "static const struct modversion_info ____versions[]\n"); buf_printf(b, "__used __section(\"__versions\") = {\n"); - for (s = mod->unres; s; s = s->next) { + list_for_each_entry(s, &mod->unresolved_symbols, list) { if (!s->module) continue; if (!s->crc_valid) { @@ -2303,13 +2310,14 @@ static void add_depends(struct buffer *b, struct module *mod) int first = 1; /* Clear ->seen flag of modules that own symbols needed by this. */ - for (s = mod->unres; s; s = s->next) + list_for_each_entry(s, &mod->unresolved_symbols, list) { if (s->module) s->module->seen = s->module->is_vmlinux; + } buf_printf(b, "\n"); buf_printf(b, "MODULE_INFO(depends, \""); - for (s = mod->unres; s; s = s->next) { + list_for_each_entry(s, &mod->unresolved_symbols, list) { const char *p; if (!s->module) continue; |