summaryrefslogtreecommitdiffstats
path: root/scripts/mod/modpost.c
diff options
context:
space:
mode:
Diffstat (limited to 'scripts/mod/modpost.c')
-rw-r--r--scripts/mod/modpost.c153
1 files changed, 74 insertions, 79 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index ff36c508a10..62164348ecf 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -15,17 +15,12 @@
#include <stdio.h>
#include <ctype.h>
#include <string.h>
+#include <limits.h>
+#include <stdbool.h>
#include "modpost.h"
#include "../../include/generated/autoconf.h"
#include "../../include/linux/license.h"
-
-/* Some toolchains use a `_' prefix for all user symbols. */
-#ifdef CONFIG_SYMBOL_PREFIX
-#define MODULE_SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX
-#else
-#define MODULE_SYMBOL_PREFIX ""
-#endif
-
+#include "../../include/linux/export.h"
/* Are we using CONFIG_MODVERSIONS? */
int modversions = 0;
@@ -85,6 +80,14 @@ PRINTF void merror(const char *fmt, ...)
va_end(arglist);
}
+static inline bool strends(const char *str, const char *postfix)
+{
+ if (strlen(str) < strlen(postfix))
+ return false;
+
+ return strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
+}
+
static int is_vmlinux(const char *modname)
{
const char *myname;
@@ -120,22 +123,20 @@ static struct module *find_module(char *modname)
return mod;
}
-static struct module *new_module(char *modname)
+static struct module *new_module(const char *modname)
{
struct module *mod;
- char *p, *s;
+ char *p;
mod = NOFAIL(malloc(sizeof(*mod)));
memset(mod, 0, sizeof(*mod));
p = NOFAIL(strdup(modname));
/* strip trailing .o */
- s = strrchr(p, '.');
- if (s != NULL)
- if (strcmp(s, ".o") == 0) {
- *s = '\0';
- mod->is_dot_o = 1;
- }
+ if (strends(p, ".o")) {
+ p[strlen(p) - 2] = '\0';
+ mod->is_dot_o = 1;
+ }
/* add to list */
mod->name = p;
@@ -562,7 +563,7 @@ static void parse_elf_finish(struct elf_info *info)
static int ignore_undef_symbol(struct elf_info *info, const char *symname)
{
/* ignore __this_module, it will be resolved shortly */
- if (strcmp(symname, MODULE_SYMBOL_PREFIX "__this_module") == 0)
+ if (strcmp(symname, VMLINUX_SYMBOL_STR(__this_module)) == 0)
return 1;
/* ignore global offset table */
if (strcmp(symname, "_GLOBAL_OFFSET_TABLE_") == 0)
@@ -583,8 +584,8 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname)
return 0;
}
-#define CRC_PFX MODULE_SYMBOL_PREFIX "__crc_"
-#define KSYMTAB_PFX MODULE_SYMBOL_PREFIX "__ksymtab_"
+#define CRC_PFX VMLINUX_SYMBOL_STR(__crc_)
+#define KSYMTAB_PFX VMLINUX_SYMBOL_STR(__ksymtab_)
static void handle_modversions(struct module *mod, struct elf_info *info,
Elf_Sym *sym, const char *symname)
@@ -637,14 +638,15 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
}
#endif
- if (memcmp(symname, MODULE_SYMBOL_PREFIX,
- strlen(MODULE_SYMBOL_PREFIX)) == 0) {
- mod->unres =
- alloc_symbol(symname +
- strlen(MODULE_SYMBOL_PREFIX),
- ELF_ST_BIND(sym->st_info) == STB_WEAK,
- mod->unres);
- }
+#ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
+ if (symname[0] != '_')
+ break;
+ else
+ symname++;
+#endif
+ mod->unres = alloc_symbol(symname,
+ ELF_ST_BIND(sym->st_info) == STB_WEAK,
+ mod->unres);
break;
default:
/* All exported symbols */
@@ -652,9 +654,9 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
sym_add_exported(symname + strlen(KSYMTAB_PFX), mod,
export);
}
- if (strcmp(symname, MODULE_SYMBOL_PREFIX "init_module") == 0)
+ if (strcmp(symname, VMLINUX_SYMBOL_STR(init_module)) == 0)
mod->has_init = 1;
- if (strcmp(symname, MODULE_SYMBOL_PREFIX "cleanup_module") == 0)
+ if (strcmp(symname, VMLINUX_SYMBOL_STR(cleanup_module)) == 0)
mod->has_cleanup = 1;
break;
}
@@ -830,6 +832,8 @@ static const char *section_white_list[] =
".toc*",
".xt.prop", /* xtensa */
".xt.lit", /* xtensa */
+ ".arcextmap*", /* arc */
+ ".gnu.linkonce.arcext*", /* arc : modules */
NULL
};
@@ -857,37 +861,34 @@ static void check_section(const char *modname, struct elf_info *elf,
#define ALL_INIT_DATA_SECTIONS \
- ".init.setup$", ".init.rodata$", \
- ".cpuinit.rodata$", ".meminit.rodata$", \
- ".init.data$", ".cpuinit.data$", ".meminit.data$"
+ ".init.setup$", ".init.rodata$", ".meminit.rodata$", \
+ ".init.data$", ".meminit.data$"
#define ALL_EXIT_DATA_SECTIONS \
- ".exit.data$", ".cpuexit.data$", ".memexit.data$"
+ ".exit.data$", ".memexit.data$"
#define ALL_INIT_TEXT_SECTIONS \
- ".init.text$", ".cpuinit.text$", ".meminit.text$"
+ ".init.text$", ".meminit.text$"
#define ALL_EXIT_TEXT_SECTIONS \
- ".exit.text$", ".cpuexit.text$", ".memexit.text$"
+ ".exit.text$", ".memexit.text$"
#define ALL_PCI_INIT_SECTIONS \
".pci_fixup_early$", ".pci_fixup_header$", ".pci_fixup_final$", \
".pci_fixup_enable$", ".pci_fixup_resume$", \
".pci_fixup_resume_early$", ".pci_fixup_suspend$"
-#define ALL_XXXINIT_SECTIONS CPU_INIT_SECTIONS, MEM_INIT_SECTIONS
-#define ALL_XXXEXIT_SECTIONS CPU_EXIT_SECTIONS, MEM_EXIT_SECTIONS
+#define ALL_XXXINIT_SECTIONS MEM_INIT_SECTIONS
+#define ALL_XXXEXIT_SECTIONS MEM_EXIT_SECTIONS
#define ALL_INIT_SECTIONS INIT_SECTIONS, ALL_XXXINIT_SECTIONS
#define ALL_EXIT_SECTIONS EXIT_SECTIONS, ALL_XXXEXIT_SECTIONS
#define DATA_SECTIONS ".data$", ".data.rel$"
-#define TEXT_SECTIONS ".text$"
+#define TEXT_SECTIONS ".text$", ".text.unlikely$"
#define INIT_SECTIONS ".init.*"
-#define CPU_INIT_SECTIONS ".cpuinit.*"
#define MEM_INIT_SECTIONS ".meminit.*"
#define EXIT_SECTIONS ".exit.*"
-#define CPU_EXIT_SECTIONS ".cpuexit.*"
#define MEM_EXIT_SECTIONS ".memexit.*"
/* init data sections */
@@ -975,48 +976,20 @@ const struct sectioncheck sectioncheck[] = {
.mismatch = DATA_TO_ANY_EXIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
-/* Do not reference init code/data from cpuinit/meminit code/data */
+/* Do not reference init code/data from meminit code/data */
{
.fromsec = { ALL_XXXINIT_SECTIONS, NULL },
.tosec = { INIT_SECTIONS, NULL },
.mismatch = XXXINIT_TO_SOME_INIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
-/* Do not reference cpuinit code/data from meminit code/data */
-{
- .fromsec = { MEM_INIT_SECTIONS, NULL },
- .tosec = { CPU_INIT_SECTIONS, NULL },
- .mismatch = XXXINIT_TO_SOME_INIT,
- .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
-},
-/* Do not reference meminit code/data from cpuinit code/data */
-{
- .fromsec = { CPU_INIT_SECTIONS, NULL },
- .tosec = { MEM_INIT_SECTIONS, NULL },
- .mismatch = XXXINIT_TO_SOME_INIT,
- .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
-},
-/* Do not reference exit code/data from cpuexit/memexit code/data */
+/* Do not reference exit code/data from memexit code/data */
{
.fromsec = { ALL_XXXEXIT_SECTIONS, NULL },
.tosec = { EXIT_SECTIONS, NULL },
.mismatch = XXXEXIT_TO_SOME_EXIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
-/* Do not reference cpuexit code/data from memexit code/data */
-{
- .fromsec = { MEM_EXIT_SECTIONS, NULL },
- .tosec = { CPU_EXIT_SECTIONS, NULL },
- .mismatch = XXXEXIT_TO_SOME_EXIT,
- .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
-},
-/* Do not reference memexit code/data from cpuexit code/data */
-{
- .fromsec = { CPU_EXIT_SECTIONS, NULL },
- .tosec = { MEM_EXIT_SECTIONS, NULL },
- .mismatch = XXXEXIT_TO_SOME_EXIT,
- .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
-},
/* Do not use exit code/data from init code */
{
.fromsec = { ALL_INIT_SECTIONS, NULL },
@@ -1085,8 +1058,6 @@ static const struct sectioncheck *section_mismatch(
* Pattern 2:
* Many drivers utilise a *driver container with references to
* add, remove, probe functions etc.
- * These functions may often be marked __cpuinit and we do not want to
- * warn here.
* the pattern is identified by:
* tosec = init or exit section
* fromsec = data section
@@ -1245,7 +1216,6 @@ static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr,
/*
* Convert a section name to the function/data attribute
* .init.text => __init
- * .cpuinit.data => __cpudata
* .memexitconst => __memconst
* etc.
*
@@ -1760,6 +1730,27 @@ static void read_symbols(char *modname)
mod->unres = alloc_symbol("module_layout", 0, mod->unres);
}
+static void read_symbols_from_files(const char *filename)
+{
+ FILE *in = stdin;
+ char fname[PATH_MAX];
+
+ if (strcmp(filename, "-") != 0) {
+ in = fopen(filename, "r");
+ if (!in)
+ fatal("Can't open filenames file %s: %m", filename);
+ }
+
+ while (fgets(fname, PATH_MAX, in) != NULL) {
+ if (strends(fname, "\n"))
+ fname[strlen(fname)-1] = '\0';
+ read_symbols(fname);
+ }
+
+ if (in != stdin)
+ fclose(in);
+}
+
#define SZ 500
/* We first write the generated file into memory using the
@@ -1932,7 +1923,8 @@ static int add_versions(struct buffer *b, struct module *mod)
s->name, mod->name);
continue;
}
- buf_printf(b, "\t{ %#8x, \"%s\" },\n", s->crc, s->name);
+ buf_printf(b, "\t{ %#8x, __VMLINUX_SYMBOL_STR(%s) },\n",
+ s->crc, s->name);
}
buf_printf(b, "};\n");
@@ -2120,13 +2112,13 @@ int main(int argc, char **argv)
struct module *mod;
struct buffer buf = { };
char *kernel_read = NULL, *module_read = NULL;
- char *dump_write = NULL;
+ char *dump_write = NULL, *files_source = NULL;
int opt;
int err;
struct ext_sym_list *extsym_iter;
struct ext_sym_list *extsym_start = NULL;
- while ((opt = getopt(argc, argv, "i:I:e:cmsSo:awM:K:")) != -1) {
+ while ((opt = getopt(argc, argv, "i:I:e:msST:o:awM:K:")) != -1) {
switch (opt) {
case 'i':
kernel_read = optarg;
@@ -2135,9 +2127,6 @@ int main(int argc, char **argv)
module_read = optarg;
external_module = 1;
break;
- case 'c':
- cross_build = 1;
- break;
case 'e':
external_module = 1;
extsym_iter =
@@ -2161,6 +2150,9 @@ int main(int argc, char **argv)
case 'S':
sec_mismatch_verbose = 0;
break;
+ case 'T':
+ files_source = optarg;
+ break;
case 'w':
warn_unresolved = 1;
break;
@@ -2183,6 +2175,9 @@ int main(int argc, char **argv)
while (optind < argc)
read_symbols(argv[optind++]);
+ if (files_source)
+ read_symbols_from_files(files_source);
+
for (mod = modules; mod; mod = mod->next) {
if (mod->skip)
continue;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-06-04 08:22:05 +0000