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Merge branch 'module' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus

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* 'module' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  modpost: fix segfault with short symbol names
  module: handle ppc64 relocating kcrctabs when CONFIG_RELOCATABLE=y
  Kbuild: clear marker out of modpost
  module: make MODULE_SYMBOL_PREFIX into a CONFIG option
  ARM: unexport symbols used to implement floating point emulation
  ARM: use unified discard definition in linker script
  x86: don't export inline function
  sparc64: don't export static inline pci_ functions
This commit is contained in:
Linus Torvalds
2009-12-16 10:47:24 -08:00
parent d8bef0bb21 8d99513c1b
commit 74f3ae7434
21 changed files with 75 additions and 236 deletions
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5
scripts/Makefile.lib
View File

@ -127,6 +127,11 @@ _c_flags += $(if $(patsubst n%,, \
$(CFLAGS_GCOV))
endif
ifdef CONFIG_SYMBOL_PREFIX
_cpp_flags += -DSYMBOL_PREFIX=$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX))
endif
# If building the kernel in a separate objtree expand all occurrences
# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').

2
scripts/mod/Makefile
View File

@ -8,7 +8,7 @@ modpost-objs := modpost.o file2alias.o sumversion.o
$(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o: $(obj)/elfconfig.h
quiet_cmd_elfconfig = MKELF $@
cmd_elfconfig = $(obj)/mk_elfconfig $(ARCH) < $< > $@
cmd_elfconfig = $(obj)/mk_elfconfig < $< > $@
$(obj)/elfconfig.h: $(obj)/empty.o $(obj)/mk_elfconfig FORCE
$(call if_changed,elfconfig)

9
scripts/mod/mk_elfconfig.c
View File

@ -9,9 +9,6 @@ main(int argc, char **argv)
unsigned char ei[EI_NIDENT];
union { short s; char c[2]; } endian_test;
if (argc != 2) {
fprintf(stderr, "Error: no arch\n");
}
if (fread(ei, 1, EI_NIDENT, stdin) != EI_NIDENT) {
fprintf(stderr, "Error: input truncated\n");
return 1;
@ -55,12 +52,6 @@ main(int argc, char **argv)
else
exit(1);
if ((strcmp(argv[1], "h8300") == 0)
|| (strcmp(argv[1], "blackfin") == 0))
printf("#define MODULE_SYMBOL_PREFIX \"_\"\n");
else
printf("#define MODULE_SYMBOL_PREFIX \"\"\n");
return 0;
}

177
scripts/mod/modpost.c
View File

@ -15,8 +15,17 @@
#include <stdio.h>
#include <ctype.h>
#include "modpost.h"
#include "../../include/linux/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
/* Are we using CONFIG_MODVERSIONS? */
int modversions = 0;
/* Warn about undefined symbols? (do so if we have vmlinux) */
@ -451,8 +460,6 @@ static int parse_elf(struct elf_info *info, const char *filename)
info->export_unused_gpl_sec = i;
else if (strcmp(secname, "__ksymtab_gpl_future") == 0)
info->export_gpl_future_sec = i;
else if (strcmp(secname, "__markers_strings") == 0)
info->markers_strings_sec = i;
if (sechdrs[i].sh_type != SHT_SYMTAB)
continue;
@ -515,7 +522,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
break;
case SHN_ABS:
/* CRC'd symbol */
if (memcmp(symname, CRC_PFX, strlen(CRC_PFX)) == 0) {
if (strncmp(symname, CRC_PFX, strlen(CRC_PFX)) == 0) {
crc = (unsigned int) sym->st_value;
sym_update_crc(symname + strlen(CRC_PFX), mod, crc,
export);
@ -559,7 +566,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
break;
default:
/* All exported symbols */
if (memcmp(symname, KSYMTAB_PFX, strlen(KSYMTAB_PFX)) == 0) {
if (strncmp(symname, KSYMTAB_PFX, strlen(KSYMTAB_PFX)) == 0) {
sym_add_exported(symname + strlen(KSYMTAB_PFX), mod,
export);
}
@ -1509,62 +1516,6 @@ static void check_sec_ref(struct module *mod, const char *modname,
}
}
static void get_markers(struct elf_info *info, struct module *mod)
{
const Elf_Shdr *sh = &info->sechdrs[info->markers_strings_sec];
const char *strings = (const char *) info->hdr + sh->sh_offset;
const Elf_Sym *sym, *first_sym, *last_sym;
size_t n;
if (!info->markers_strings_sec)
return;
/*
* First count the strings. We look for all the symbols defined
* in the __markers_strings section named __mstrtab_*. For
* these local names, the compiler puts a random .NNN suffix on,
* so the names don't correspond exactly.
*/
first_sym = last_sym = NULL;
n = 0;
for (sym = info->symtab_start; sym < info->symtab_stop; sym++)
if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT &&
sym->st_shndx == info->markers_strings_sec &&
!strncmp(info->strtab + sym->st_name,
"__mstrtab_", sizeof "__mstrtab_" - 1)) {
if (first_sym == NULL)
first_sym = sym;
last_sym = sym;
++n;
}
if (n == 0)
return;
/*
* Now collect each name and format into a line for the output.
* Lines look like:
* marker_name vmlinux marker %s format %d
* The format string after the second \t can use whitespace.
*/
mod->markers = NOFAIL(malloc(sizeof mod->markers[0] * n));
mod->nmarkers = n;
n = 0;
for (sym = first_sym; sym <= last_sym; sym++)
if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT &&
sym->st_shndx == info->markers_strings_sec &&
!strncmp(info->strtab + sym->st_name,
"__mstrtab_", sizeof "__mstrtab_" - 1)) {
const char *name = strings + sym->st_value;
const char *fmt = strchr(name, '\0') + 1;
char *line = NULL;
asprintf(&line, "%s\t%s\t%s\n", name, mod->name, fmt);
NOFAIL(line);
mod->markers[n++] = line;
}
}
static void read_symbols(char *modname)
{
const char *symname;
@ -1620,8 +1571,6 @@ static void read_symbols(char *modname)
get_src_version(modname, mod->srcversion,
sizeof(mod->srcversion)-1);
get_markers(&info, mod);
parse_elf_finish(&info);
/* Our trick to get versioning for module struct etc. - it's
@ -1976,96 +1925,6 @@ static void write_dump(const char *fname)
write_if_changed(&buf, fname);
}
static void add_marker(struct module *mod, const char *name, const char *fmt)
{
char *line = NULL;
asprintf(&line, "%s\t%s\t%s\n", name, mod->name, fmt);
NOFAIL(line);
mod->markers = NOFAIL(realloc(mod->markers, ((mod->nmarkers + 1) *
sizeof mod->markers[0])));
mod->markers[mod->nmarkers++] = line;
}
static void read_markers(const char *fname)
{
unsigned long size, pos = 0;
void *file = grab_file(fname, &size);
char *line;
if (!file) /* No old markers, silently ignore */
return;
while ((line = get_next_line(&pos, file, size))) {
char *marker, *modname, *fmt;
struct module *mod;
marker = line;
modname = strchr(marker, '\t');
if (!modname)
goto fail;
*modname++ = '\0';
fmt = strchr(modname, '\t');
if (!fmt)
goto fail;
*fmt++ = '\0';
if (*marker == '\0' || *modname == '\0')
goto fail;
mod = find_module(modname);
if (!mod) {
mod = new_module(modname);
mod->skip = 1;
}
if (is_vmlinux(modname)) {
have_vmlinux = 1;
mod->skip = 0;
}
if (!mod->skip)
add_marker(mod, marker, fmt);
}
release_file(file, size);
return;
fail:
fatal("parse error in markers list file\n");
}
static int compare_strings(const void *a, const void *b)
{
return strcmp(*(const char **) a, *(const char **) b);
}
static void write_markers(const char *fname)
{
struct buffer buf = { };
struct module *mod;
size_t i;
for (mod = modules; mod; mod = mod->next)
if ((!external_module || !mod->skip) && mod->markers != NULL) {
/*
* Sort the strings so we can skip duplicates when
* we write them out.
*/
qsort(mod->markers, mod->nmarkers,
sizeof mod->markers[0], &compare_strings);
for (i = 0; i < mod->nmarkers; ++i) {
char *line = mod->markers[i];
buf_write(&buf, line, strlen(line));
while (i + 1 < mod->nmarkers &&
!strcmp(mod->markers[i],
mod->markers[i + 1]))
free(mod->markers[i++]);
free(mod->markers[i]);
}
free(mod->markers);
mod->markers = NULL;
}
write_if_changed(&buf, fname);
}
struct ext_sym_list {
struct ext_sym_list *next;
const char *file;
@ -2077,8 +1936,6 @@ int main(int argc, char **argv)
struct buffer buf = { };
char *kernel_read = NULL, *module_read = NULL;
char *dump_write = NULL;
char *markers_read = NULL;
char *markers_write = NULL;
int opt;
int err;
struct ext_sym_list *extsym_iter;
@ -2122,12 +1979,6 @@ int main(int argc, char **argv)
case 'w':
warn_unresolved = 1;
break;
case 'M':
markers_write = optarg;
break;
case 'K':
markers_read = optarg;
break;
default:
exit(1);
}
@ -2182,11 +2033,5 @@ int main(int argc, char **argv)
"'make CONFIG_DEBUG_SECTION_MISMATCH=y'\n",
sec_mismatch_count);
if (markers_read)
read_markers(markers_read);
if (markers_write)
write_markers(markers_write);
return err;
}

3
scripts/mod/modpost.h
View File

@ -112,8 +112,6 @@ struct module {
int has_init;
int has_cleanup;
struct buffer dev_table_buf;
char **markers;
size_t nmarkers;
char srcversion[25];
};
@ -128,7 +126,6 @@ struct elf_info {
Elf_Section export_gpl_sec;
Elf_Section export_unused_gpl_sec;
Elf_Section export_gpl_future_sec;
Elf_Section markers_strings_sec;
const char *strtab;
char *modinfo;
unsigned int modinfo_len;