From 7d3392e54653171bd13467bf37f1182e83fadd08 Mon Sep 17 00:00:00 2001 From: Markus Heidelberg Date: Fri, 12 Jun 2009 01:02:35 +0200 Subject: trivial: remove references to non-existent include/linux/config.h Ignore drivers/staging/ since it is very likely that new drivers introduce it again. Signed-off-by: Markus Heidelberg Signed-off-by: Jiri Kosina --- scripts/mod/sumversion.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/sumversion.c b/scripts/mod/sumversion.c index aadc522..ecf9c7d 100644 --- a/scripts/mod/sumversion.c +++ b/scripts/mod/sumversion.c @@ -334,8 +334,6 @@ static int parse_source_files(const char *objfile, struct md4_ctx *md) deps_drivers/net/dummy.o := \ drivers/net/dummy.c \ $(wildcard include/config/net/fastroute.h) \ - include/linux/config.h \ - $(wildcard include/config/h.h) \ include/linux/module.h \ Sum all files in the same dir or subdirs. -- cgit v1.1 From 5c725138437837291db5c25f4a076ee852e806e3 Mon Sep 17 00:00:00 2001 From: Trevor Keith Date: Tue, 22 Sep 2009 16:43:38 -0700 Subject: Fix all -Wmissing-prototypes warnings in x86 defconfig Signed-off-by: Trevor Keith Cc: Sam Ravnborg Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/mod/modpost.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 4522948..801a16a 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -691,7 +691,7 @@ static int number_prefix(const char *sym) * The $ syntax is for sections where ld append a dot number * to make section name unique. */ -int match(const char *sym, const char * const pat[]) +static int match(const char *sym, const char * const pat[]) { const char *p; while (*pat) { @@ -1746,7 +1746,7 @@ static void add_header(struct buffer *b, struct module *mod) buf_printf(b, "};\n"); } -void add_staging_flag(struct buffer *b, const char *name) +static void add_staging_flag(struct buffer *b, const char *name) { static const char *staging_dir = "drivers/staging"; -- cgit v1.1 From 75368bf6c2876d8f33abfe77aa3864869a3893eb Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Tue, 22 Sep 2009 16:46:04 -0700 Subject: spi: add support for device table matching With this patch spi drivers can use standard spi_driver.id_table and MODULE_DEVICE_TABLE() mechanisms to bind against the devices. Just like we do with I2C drivers. This is useful when a single driver supports several variants of devices but it is not possible to detect them in run-time (like non-JEDEC chips probing in drivers/mtd/devices/m25p80.c), and when platform_data usage is overkill. This patch also makes life a lot easier on OpenFirmware platforms, since with OF we extensively use proper device IDs in modaliases. Signed-off-by: Anton Vorontsov Cc: David Brownell Cc: David Woodhouse Cc: Grant Likely Cc: Jean Delvare Cc: Ben Dooks Cc: Benjamin Herrenschmidt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/mod/file2alias.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'scripts/mod') diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 40e0045..9d446e3 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -657,6 +657,15 @@ static int do_i2c_entry(const char *filename, struct i2c_device_id *id, return 1; } +/* Looks like: S */ +static int do_spi_entry(const char *filename, struct spi_device_id *id, + char *alias) +{ + sprintf(alias, "%s", id->name); + + return 1; +} + static const struct dmifield { const char *prefix; int field; @@ -853,6 +862,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, do_table(symval, sym->st_size, sizeof(struct i2c_device_id), "i2c", do_i2c_entry, mod); + else if (sym_is(symname, "__mod_spi_device_table")) + do_table(symval, sym->st_size, + sizeof(struct spi_device_id), "spi", + do_spi_entry, mod); else if (sym_is(symname, "__mod_dmi_device_table")) do_table(symval, sym->st_size, sizeof(struct dmi_system_id), "dmi", -- cgit v1.1 From e0626e3844e8f430fc1a4417f523a00797df7ca6 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Tue, 22 Sep 2009 16:46:08 -0700 Subject: spi: prefix modalias with "spi:" This makes it consistent with other buses (platform, i2c, vio, ...). I'm not sure why we use the prefixes, but there must be a reason. This was easy enough to do it, and I did it. Signed-off-by: Anton Vorontsov Cc: David Brownell Cc: David Woodhouse Cc: Grant Likely Cc: Jean Delvare Cc: Ben Dooks Cc: Benjamin Herrenschmidt Cc: Dmitry Torokhov Cc: Samuel Ortiz Cc: "John W. Linville" Acked-by: Mike Frysinger Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/mod/file2alias.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 9d446e3..62a9025 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -657,11 +657,11 @@ static int do_i2c_entry(const char *filename, struct i2c_device_id *id, return 1; } -/* Looks like: S */ +/* Looks like: spi:S */ static int do_spi_entry(const char *filename, struct spi_device_id *id, char *alias) { - sprintf(alias, "%s", id->name); + sprintf(alias, SPI_MODULE_PREFIX "%s", id->name); return 1; } -- cgit v1.1 From afe2dab4f6d32d5650aaba42f2c7ec9c0622f4dd Mon Sep 17 00:00:00 2001 From: Nathaniel McCallum Date: Wed, 18 Nov 2009 20:11:23 -0500 Subject: USB: add hex/bcd detection to usb modalias generation The current code to generate usb modaliases from usb_device_id assumes that the device's bcdDevice descriptor will actually be in BCD format. While this should be a sane assumption, some devices don't follow spec and just use plain old hex. This causes drivers for these devices to generate invalid modalias lines which will never actually match for the hardware. The following patch adds hex support for bcdDevice in file2alias.c by detecting when a driver uses a hex formatted bcdDevice_(lo|hi) and adjusts the output to hex format accordingly. Drivers for devices which have bcdDevice conforming to BCD will have no change in modalias output. Drivers for devices which don't conform (i.e. ibmcam) should now generate valid modaliases. EXAMPLE OUTPUT (ibmcam; space added to highlight change) Old: usb:v0545p800D d030[10-9] dc*dsc*dp*ic*isc*ip* New: usb:v0545p800D d030a dc*dsc*dp*ic*isc*ip* Signed-off-by: Nathaniel McCallum Signed-off-by: Greg Kroah-Hartman --- scripts/mod/file2alias.c | 48 ++++++++++++++++++++++++++++++++++++------------ 1 file changed, 36 insertions(+), 12 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 62a9025..e31f03a 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -104,7 +104,7 @@ static void device_id_check(const char *modname, const char *device_id, static void do_usb_entry(struct usb_device_id *id, unsigned int bcdDevice_initial, int bcdDevice_initial_digits, unsigned char range_lo, unsigned char range_hi, - struct module *mod) + unsigned char max, struct module *mod) { char alias[500]; strcpy(alias, "usb:"); @@ -118,9 +118,22 @@ static void do_usb_entry(struct usb_device_id *id, sprintf(alias + strlen(alias), "%0*X", bcdDevice_initial_digits, bcdDevice_initial); if (range_lo == range_hi) - sprintf(alias + strlen(alias), "%u", range_lo); - else if (range_lo > 0 || range_hi < 9) - sprintf(alias + strlen(alias), "[%u-%u]", range_lo, range_hi); + sprintf(alias + strlen(alias), "%X", range_lo); + else if (range_lo > 0 || range_hi < max) { + if (range_lo > 0x9 || range_hi < 0xA) + sprintf(alias + strlen(alias), + "[%X-%X]", + range_lo, + range_hi); + else { + sprintf(alias + strlen(alias), + range_lo < 0x9 ? "[%X-9" : "[%X", + range_lo); + sprintf(alias + strlen(alias), + range_hi > 0xA ? "a-%X]" : "%X]", + range_lo); + } + } if (bcdDevice_initial_digits < (sizeof(id->bcdDevice_lo) * 2 - 1)) strcat(alias, "*"); @@ -150,7 +163,7 @@ static void do_usb_entry(struct usb_device_id *id, static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod) { unsigned int devlo, devhi; - unsigned char chi, clo; + unsigned char chi, clo, max; int ndigits; id->match_flags = TO_NATIVE(id->match_flags); @@ -162,6 +175,17 @@ static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod) devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ? TO_NATIVE(id->bcdDevice_hi) : ~0x0U; + /* Figure out if this entry is in bcd or hex format */ + max = 0x9; /* Default to decimal format */ + for (ndigits = 0 ; ndigits < sizeof(id->bcdDevice_lo) * 2 ; ndigits++) { + clo = (devlo >> (ndigits << 2)) & 0xf; + chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf; + if (clo > max || chi > max) { + max = 0xf; + break; + } + } + /* * Some modules (visor) have empty slots as placeholder for * run-time specification that results in catch-all alias @@ -173,21 +197,21 @@ static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod) for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) { clo = devlo & 0xf; chi = devhi & 0xf; - if (chi > 9) /* it's bcd not hex */ - chi = 9; + if (chi > max) /* If we are in bcd mode, truncate if necessary */ + chi = max; devlo >>= 4; devhi >>= 4; if (devlo == devhi || !ndigits) { - do_usb_entry(id, devlo, ndigits, clo, chi, mod); + do_usb_entry(id, devlo, ndigits, clo, chi, max, mod); break; } - if (clo > 0) - do_usb_entry(id, devlo++, ndigits, clo, 9, mod); + if (clo > 0x0) + do_usb_entry(id, devlo++, ndigits, clo, max, max, mod); - if (chi < 9) - do_usb_entry(id, devhi--, ndigits, 0, chi, mod); + if (chi < max) + do_usb_entry(id, devhi--, ndigits, 0x0, chi, max, mod); } } -- cgit v1.1 From 55f49f26821f379c451deb9fd6de8e59afb9b37e Mon Sep 17 00:00:00 2001 From: Nathaniel McCallum Date: Wed, 18 Nov 2009 20:15:28 -0500 Subject: USB: handle bcd incrementation in usb modalias generation This patch fixes a bug when incrementing/decrementing on a BCD formatted integer (i.e. 0x09++ should be 0x10 not 0x0A). It just adds a function for incrementing/decrementing BCD integers by converting to decimal, doing the increment/decrement and then converting back to BCD. Signed-off-by: Nathaniel McCallum Signed-off-by: Greg Kroah-Hartman --- scripts/mod/file2alias.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 47 insertions(+), 2 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index e31f03a..6f426af 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -160,6 +160,45 @@ static void do_usb_entry(struct usb_device_id *id, "MODULE_ALIAS(\"%s\");\n", alias); } +/* Handles increment/decrement of BCD formatted integers */ +/* Returns the previous value, so it works like i++ or i-- */ +static unsigned int incbcd(unsigned int *bcd, + int inc, + unsigned char max, + size_t chars) +{ + unsigned int init = *bcd, i, j; + unsigned long long c, dec = 0; + + /* If bcd is not in BCD format, just increment */ + if (max > 0x9) { + *bcd += inc; + return init; + } + + /* Convert BCD to Decimal */ + for (i=0 ; i < chars ; i++) { + c = (*bcd >> (i << 2)) & 0xf; + c = c > 9 ? 9 : c; /* force to bcd just in case */ + for (j=0 ; j < i ; j++) + c = c * 10; + dec += c; + } + + /* Do our increment/decrement */ + dec += inc; + *bcd = 0; + + /* Convert back to BCD */ + for (i=0 ; i < chars ; i++) { + for (c=1,j=0 ; j < i ; j++) + c = c * 10; + c = (dec / c) % 10; + *bcd += c << (i << 2); + } + return init; +} + static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod) { unsigned int devlo, devhi; @@ -208,10 +247,16 @@ static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod) } if (clo > 0x0) - do_usb_entry(id, devlo++, ndigits, clo, max, max, mod); + do_usb_entry(id, + incbcd(&devlo, 1, max, + sizeof(id->bcdDevice_lo) * 2), + ndigits, clo, max, max, mod); if (chi < max) - do_usb_entry(id, devhi--, ndigits, 0x0, chi, max, mod); + do_usb_entry(id, + incbcd(&devhi, -1, max, + sizeof(id->bcdDevice_lo) * 2), + ndigits, 0x0, chi, max, mod); } } -- cgit v1.1 From 9e1b9b80721661bd63b3662453767b22cd614fe7 Mon Sep 17 00:00:00 2001 From: Alan Jenkins Date: Sat, 7 Nov 2009 21:03:54 +0000 Subject: module: make MODULE_SYMBOL_PREFIX into a CONFIG option The next commit will require the use of MODULE_SYMBOL_PREFIX in .tmp_exports-asm.S. Currently it is mixed in with C structure definitions in "asm/module.h". Move the definition of this arch option into Kconfig, so it can be easily accessed by any code. This also lets modpost.c use the same definition. Previously modpost relied on a hardcoded list of architectures in mk_elfconfig.c. A build test for blackfin, one of the two MODULE_SYMBOL_PREFIX archs, showed the generated code was unchanged. vmlinux was identical save for build ids, and an apparently randomized suffix on a single "__key" symbol in the kallsyms data). Signed-off-by: Alan Jenkins Acked-by: Mike Frysinger (blackfin) CC: Sam Ravnborg Signed-off-by: Rusty Russell --- scripts/mod/Makefile | 2 +- scripts/mod/mk_elfconfig.c | 9 --------- scripts/mod/modpost.c | 9 +++++++++ 3 files changed, 10 insertions(+), 10 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile index 11d69c3..ff954f8 100644 --- a/scripts/mod/Makefile +++ b/scripts/mod/Makefile @@ -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) diff --git a/scripts/mod/mk_elfconfig.c b/scripts/mod/mk_elfconfig.c index 6a96d47..639bca7 100644 --- a/scripts/mod/mk_elfconfig.c +++ b/scripts/mod/mk_elfconfig.c @@ -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; } diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 801a16a..fb0f9b7 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -15,8 +15,17 @@ #include #include #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) */ -- cgit v1.1 From a8773769d1a1e08d0ca15f890515401ab3860637 Mon Sep 17 00:00:00 2001 From: Wenji Huang Date: Mon, 16 Nov 2009 13:49:55 +0800 Subject: Kbuild: clear marker out of modpost Remove the unnecessary functions and variables. Signed-off-by: Wenji Huang Signed-off-by: Michal Marek Signed-off-by: Rusty Russell --- scripts/mod/modpost.c | 164 -------------------------------------------------- scripts/mod/modpost.h | 3 - 2 files changed, 167 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index fb0f9b7..c16c0a0 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -460,8 +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; @@ -1518,62 +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; @@ -1629,8 +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 @@ -1985,96 +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; @@ -2086,8 +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; @@ -2131,12 +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); } @@ -2191,11 +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; } diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h index 09f58e3..be987a4 100644 --- a/scripts/mod/modpost.h +++ b/scripts/mod/modpost.h @@ -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; -- cgit v1.1 From 8d99513c1b76cfd0b2dcf061c5136cb1061e6b37 Mon Sep 17 00:00:00 2001 From: Michal Marek Date: Sat, 12 Dec 2009 12:02:24 +0100 Subject: modpost: fix segfault with short symbol names memcmp() is wrong here, the symbol name can be shorter than KSYMTAB_PFX or CRC_PFX. Signed-off-by: Michal Marek Signed-off-by: Rusty Russell --- scripts/mod/modpost.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index c16c0a0..6c4ffc7 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -522,7 +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); @@ -566,7 +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); } -- cgit v1.1 From 3a5dd791abef032fe57fc652c0232913c696e59b Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sun, 17 Jan 2010 08:27:34 +1030 Subject: modpost: fix segfault in sym_is() with prefixed arches The sym_is() compares a symbol in an attempt to automatically skip symbol prefixes. It does this first by searching the real symbol with the normal unprefixed symbol. But then it uses the length of the original symbol to check the end of the substring instead of the length of the symbol it is looking for. On non-prefixed arches, this is effectively the same thing, so there is no problem. On prefixed-arches, since this is exceeds by just one byte, a crash is rare and it is usually a NUL byte anyways. But every once in a blue moon, you get the right page alignment and it segfaults. For example, on the Blackfin arch, sym_is() will be called with the real symbol "___mod_usb_device_table" as "symbol" when looking for the normal symbol "__mod_usb_device_table" as "name". The substring will thus return one byte into "symbol" and store it into "match". But then "match" will be indexed with the length of "symbol" instead of "name" and so we will exceed the storage. i.e. the code ends up doing: char foo[] = "abc"; return foo[strlen(foo)+1] == '\0'; Signed-off-by: Mike Frysinger Signed-off-by: Rusty Russell Signed-off-by: Linus Torvalds --- scripts/mod/file2alias.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'scripts/mod') diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 6f426af..220213e 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -804,7 +804,7 @@ static inline int sym_is(const char *symbol, const char *name) match = strstr(symbol, name); if (!match) return 0; - return match[strlen(symbol)] == '\0'; + return match[strlen(name)] == '\0'; } static void do_table(void *symval, unsigned long size, -- cgit v1.1 From b75dcabd6c6c71d7cea64f78b06d18d9cda0ddd1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Fri, 29 Jan 2010 11:40:38 +0100 Subject: modpost: members of *driver structs should not point to __init functions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Either the functions referred to in a driver struct should live in .devinit or the driver should be registered using platform_driver_probe (or equivalent for different driver types) with ->probe being NULL. Signed-off-by: Uwe Kleine-König --- scripts/mod/modpost.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 2092361..713b62e 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -961,7 +961,7 @@ static int section_mismatch(const char *fromsec, const char *tosec) * Pattern 2: * Many drivers utilise a *driver container with references to * add, remove, probe functions etc. - * These functions may often be marked __init and we do not want to + * These functions may often be marked __devinit and we do not want to * warn here. * the pattern is identified by: * tosec = init or exit section -- cgit v1.1 From 4a31a229fb6cbbeabf5ca9a0dcb55d53ca052048 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Fri, 29 Jan 2010 12:04:26 +0100 Subject: modpost: define ALL_XXX{IN,EX}IT_SECTIONS MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Uwe Kleine-König --- scripts/mod/modpost.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 713b62e..dbab53a 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -781,10 +781,13 @@ static void check_section(const char *modname, struct elf_info *elf, #define ALL_EXIT_TEXT_SECTIONS \ ".exit.text$", ".devexit.text$", ".cpuexit.text$", ".memexit.text$" -#define ALL_INIT_SECTIONS INIT_SECTIONS, DEV_INIT_SECTIONS, \ - CPU_INIT_SECTIONS, MEM_INIT_SECTIONS -#define ALL_EXIT_SECTIONS EXIT_SECTIONS, DEV_EXIT_SECTIONS, \ - CPU_EXIT_SECTIONS, MEM_EXIT_SECTIONS +#define ALL_XXXINIT_SECTIONS DEV_INIT_SECTIONS, CPU_INIT_SECTIONS, \ + MEM_INIT_SECTIONS +#define ALL_XXXEXIT_SECTIONS DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, \ + MEM_EXIT_SECTIONS + +#define ALL_INIT_SECTIONS INIT_SECTIONS, ALL_XXXINIT_SECTIONS +#define ALL_EXIT_SECTIONS EXIT_SECTIONS, ALL_XXXEXIT_SECTIONS #define DATA_SECTIONS ".data$", ".data.rel$" #define TEXT_SECTIONS ".text$" @@ -876,7 +879,7 @@ const struct sectioncheck sectioncheck[] = { }, /* Do not reference init code/data from devinit/cpuinit/meminit code/data */ { - .fromsec = { DEV_INIT_SECTIONS, CPU_INIT_SECTIONS, MEM_INIT_SECTIONS, NULL }, + .fromsec = { ALL_XXXINIT_SECTIONS, NULL }, .tosec = { INIT_SECTIONS, NULL }, .mismatch = XXXINIT_TO_INIT, }, @@ -894,7 +897,7 @@ const struct sectioncheck sectioncheck[] = { }, /* Do not reference exit code/data from devexit/cpuexit/memexit code/data */ { - .fromsec = { DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, MEM_EXIT_SECTIONS, NULL }, + .fromsec = { ALL_XXXEXIT_SECTIONS, NULL }, .tosec = { EXIT_SECTIONS, NULL }, .mismatch = XXXEXIT_TO_EXIT, }, -- cgit v1.1 From bbd3f4fb84f8c4a04f22c9c6dc119b0c4856c7d9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Sat, 30 Jan 2010 16:35:47 +0100 Subject: modpost: give most mismatch constants a better name MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Uwe Kleine-König --- scripts/mod/modpost.c | 56 +++++++++++++++++++++++++-------------------------- 1 file changed, 28 insertions(+), 28 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index dbab53a..598d54a 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -836,14 +836,14 @@ static const char *linker_symbols[] = enum mismatch { NO_MISMATCH, - TEXT_TO_INIT, - DATA_TO_INIT, - TEXT_TO_EXIT, - DATA_TO_EXIT, - XXXINIT_TO_INIT, - XXXEXIT_TO_EXIT, - INIT_TO_EXIT, - EXIT_TO_INIT, + TEXT_TO_ANY_INIT, + DATA_TO_ANY_INIT, + TEXT_TO_ANY_EXIT, + DATA_TO_ANY_EXIT, + XXXINIT_TO_SOME_INIT, + XXXEXIT_TO_SOME_EXIT, + ANY_INIT_TO_ANY_EXIT, + ANY_EXIT_TO_ANY_INIT, EXPORT_TO_INIT_EXIT, }; @@ -860,70 +860,70 @@ const struct sectioncheck sectioncheck[] = { { .fromsec = { TEXT_SECTIONS, NULL }, .tosec = { ALL_INIT_SECTIONS, NULL }, - .mismatch = TEXT_TO_INIT, + .mismatch = TEXT_TO_ANY_INIT, }, { .fromsec = { DATA_SECTIONS, NULL }, .tosec = { ALL_INIT_SECTIONS, NULL }, - .mismatch = DATA_TO_INIT, + .mismatch = DATA_TO_ANY_INIT, }, { .fromsec = { TEXT_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, - .mismatch = TEXT_TO_EXIT, + .mismatch = TEXT_TO_ANY_EXIT, }, { .fromsec = { DATA_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, - .mismatch = DATA_TO_EXIT, + .mismatch = DATA_TO_ANY_EXIT, }, /* Do not reference init code/data from devinit/cpuinit/meminit code/data */ { .fromsec = { ALL_XXXINIT_SECTIONS, NULL }, .tosec = { INIT_SECTIONS, NULL }, - .mismatch = XXXINIT_TO_INIT, + .mismatch = XXXINIT_TO_SOME_INIT, }, /* Do not reference cpuinit code/data from meminit code/data */ { .fromsec = { MEM_INIT_SECTIONS, NULL }, .tosec = { CPU_INIT_SECTIONS, NULL }, - .mismatch = XXXINIT_TO_INIT, + .mismatch = XXXINIT_TO_SOME_INIT, }, /* Do not reference meminit code/data from cpuinit code/data */ { .fromsec = { CPU_INIT_SECTIONS, NULL }, .tosec = { MEM_INIT_SECTIONS, NULL }, - .mismatch = XXXINIT_TO_INIT, + .mismatch = XXXINIT_TO_SOME_INIT, }, /* Do not reference exit code/data from devexit/cpuexit/memexit code/data */ { .fromsec = { ALL_XXXEXIT_SECTIONS, NULL }, .tosec = { EXIT_SECTIONS, NULL }, - .mismatch = XXXEXIT_TO_EXIT, + .mismatch = XXXEXIT_TO_SOME_EXIT, }, /* Do not reference cpuexit code/data from memexit code/data */ { .fromsec = { MEM_EXIT_SECTIONS, NULL }, .tosec = { CPU_EXIT_SECTIONS, NULL }, - .mismatch = XXXEXIT_TO_EXIT, + .mismatch = XXXEXIT_TO_SOME_EXIT, }, /* Do not reference memexit code/data from cpuexit code/data */ { .fromsec = { CPU_EXIT_SECTIONS, NULL }, .tosec = { MEM_EXIT_SECTIONS, NULL }, - .mismatch = XXXEXIT_TO_EXIT, + .mismatch = XXXEXIT_TO_SOME_EXIT, }, /* Do not use exit code/data from init code */ { .fromsec = { ALL_INIT_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, - .mismatch = INIT_TO_EXIT, + .mismatch = ANY_INIT_TO_ANY_EXIT, }, /* Do not use init code/data from exit code */ { .fromsec = { ALL_EXIT_SECTIONS, NULL }, .tosec = { ALL_INIT_SECTIONS, NULL }, - .mismatch = EXIT_TO_INIT, + .mismatch = ANY_EXIT_TO_ANY_INIT, }, /* Do not export init/exit functions or data */ { @@ -1190,7 +1190,7 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch, tosym, to_p); switch (mismatch) { - case TEXT_TO_INIT: + case TEXT_TO_ANY_INIT: fprintf(stderr, "The function %s%s() references\n" "the %s %s%s%s.\n" @@ -1200,7 +1200,7 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch, to, sec2annotation(tosec), tosym, to_p, fromsym, sec2annotation(tosec), tosym); break; - case DATA_TO_INIT: { + case DATA_TO_ANY_INIT: { const char **s = symbol_white_list; fprintf(stderr, "The variable %s references\n" @@ -1214,14 +1214,14 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch, fprintf(stderr, "\n"); break; } - case TEXT_TO_EXIT: + case TEXT_TO_ANY_EXIT: fprintf(stderr, "The function %s() references a %s in an exit section.\n" "Often the %s %s%s has valid usage outside the exit section\n" "and the fix is to remove the %sannotation of %s.\n", fromsym, to, to, tosym, to_p, sec2annotation(tosec), tosym); break; - case DATA_TO_EXIT: { + case DATA_TO_ANY_EXIT: { const char **s = symbol_white_list; fprintf(stderr, "The variable %s references\n" @@ -1235,8 +1235,8 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch, fprintf(stderr, "\n"); break; } - case XXXINIT_TO_INIT: - case XXXEXIT_TO_EXIT: + case XXXINIT_TO_SOME_INIT: + case XXXEXIT_TO_SOME_EXIT: fprintf(stderr, "The %s %s%s%s references\n" "a %s %s%s%s.\n" @@ -1246,7 +1246,7 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch, to, sec2annotation(tosec), tosym, to_p, tosym, fromsym, tosym); break; - case INIT_TO_EXIT: + case ANY_INIT_TO_ANY_EXIT: fprintf(stderr, "The %s %s%s%s references\n" "a %s %s%s%s.\n" @@ -1259,7 +1259,7 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch, to, sec2annotation(tosec), tosym, to_p, sec2annotation(tosec), tosym, to_p); break; - case EXIT_TO_INIT: + case ANY_EXIT_TO_ANY_INIT: fprintf(stderr, "The %s %s%s%s references\n" "a %s %s%s%s.\n" -- cgit v1.1 From 0d2a636ee6c3b8c292fbaae05976fe1537b70958 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Sat, 30 Jan 2010 16:56:20 +0100 Subject: modpost: pass around const struct sectioncheck * instead of enum mismatch MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This prepares having a per-check whitelist of symbol names. Signed-off-by: Uwe Kleine-König --- scripts/mod/modpost.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 598d54a..3f0380b 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -933,7 +933,8 @@ const struct sectioncheck sectioncheck[] = { } }; -static int section_mismatch(const char *fromsec, const char *tosec) +static const struct sectioncheck *section_mismatch( + const char *fromsec, const char *tosec) { int i; int elems = sizeof(sectioncheck) / sizeof(struct sectioncheck); @@ -942,10 +943,10 @@ static int section_mismatch(const char *fromsec, const char *tosec) for (i = 0; i < elems; i++) { if (match(fromsec, check->fromsec) && match(tosec, check->tosec)) - return check->mismatch; + return check; check++; } - return NO_MISMATCH; + return NULL; } /** @@ -1158,7 +1159,8 @@ static int is_function(Elf_Sym *sym) * Try to find symbols near it so user can find it. * Check whitelist before warning - it may be a false positive. */ -static void report_sec_mismatch(const char *modname, enum mismatch mismatch, +static void report_sec_mismatch(const char *modname, + const struct sectioncheck *mismatch, const char *fromsec, unsigned long long fromaddr, const char *fromsym, @@ -1189,7 +1191,7 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch, modname, fromsec, fromaddr, from, fromsym, from_p, to, tosec, tosym, to_p); - switch (mismatch) { + switch (mismatch->mismatch) { case TEXT_TO_ANY_INIT: fprintf(stderr, "The function %s%s() references\n" @@ -1289,11 +1291,11 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf, Elf_Rela *r, Elf_Sym *sym, const char *fromsec) { const char *tosec; - enum mismatch mismatch; + const struct sectioncheck *mismatch; tosec = sec_name(elf, sym->st_shndx); mismatch = section_mismatch(fromsec, tosec); - if (mismatch != NO_MISMATCH) { + if (mismatch) { Elf_Sym *to; Elf_Sym *from; const char *tosym; -- cgit v1.1 From fc2f7efadb755b020ad8fdf195515dacaf185e2d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Sat, 30 Jan 2010 16:57:48 +0100 Subject: modpost: remove now unused NO_MISMATCH constant MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Uwe Kleine-König --- scripts/mod/modpost.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 3f0380b..a94bd10 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -835,7 +835,6 @@ static const char *linker_symbols[] = { "__init_begin", "_sinittext", "_einittext", NULL }; enum mismatch { - NO_MISMATCH, TEXT_TO_ANY_INIT, DATA_TO_ANY_INIT, TEXT_TO_ANY_EXIT, @@ -1280,8 +1279,6 @@ static void report_sec_mismatch(const char *modname, "Fix this by removing the %sannotation of %s " "or drop the export.\n", tosym, sec2annotation(tosec), sec2annotation(tosec), tosym); - case NO_MISMATCH: - /* To get warnings on missing members */ break; } fprintf(stderr, "\n"); -- cgit v1.1 From af92a82d0fec4dfd344b2ffd7a63e30f05c53938 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Sat, 30 Jan 2010 20:52:50 +0100 Subject: modpost: make symbol white list a per mismatch type variable MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Uwe Kleine-König --- scripts/mod/modpost.c | 49 +++++++++++++++++++++++++++++++------------------ 1 file changed, 31 insertions(+), 18 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index a94bd10..5dbe4db 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -817,18 +817,15 @@ static const char *data_sections[] = { DATA_SECTIONS, NULL }; /* symbols in .data that may refer to init/exit sections */ -static const char *symbol_white_list[] = -{ - "*driver", - "*_template", /* scsi uses *_template a lot */ - "*_timer", /* arm uses ops structures named _timer a lot */ - "*_sht", /* scsi also used *_sht to some extent */ - "*_ops", - "*_probe", - "*_probe_one", - "*_console", - NULL -}; +#define DEFAULT_SYMBOL_WHITE_LIST \ + "*driver", \ + "*_template", /* scsi uses *_template a lot */ \ + "*_timer", /* arm uses ops structures named _timer a lot */ \ + "*_sht", /* scsi also used *_sht to some extent */ \ + "*_ops", \ + "*_probe", \ + "*_probe_one", \ + "*_console" static const char *head_sections[] = { ".head.text*", NULL }; static const char *linker_symbols[] = @@ -850,6 +847,7 @@ struct sectioncheck { const char *fromsec[20]; const char *tosec[20]; enum mismatch mismatch; + const char *symbol_white_list[20]; }; const struct sectioncheck sectioncheck[] = { @@ -860,75 +858,88 @@ const struct sectioncheck sectioncheck[] = { .fromsec = { TEXT_SECTIONS, NULL }, .tosec = { ALL_INIT_SECTIONS, NULL }, .mismatch = TEXT_TO_ANY_INIT, + .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, }, { .fromsec = { DATA_SECTIONS, NULL }, .tosec = { ALL_INIT_SECTIONS, NULL }, .mismatch = DATA_TO_ANY_INIT, + .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, }, { .fromsec = { TEXT_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, .mismatch = TEXT_TO_ANY_EXIT, + .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, }, { .fromsec = { DATA_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, .mismatch = DATA_TO_ANY_EXIT, + .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, }, /* Do not reference init code/data from devinit/cpuinit/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 devexit/cpuexit/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 }, .tosec = { ALL_EXIT_SECTIONS, NULL }, .mismatch = ANY_INIT_TO_ANY_EXIT, + .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, }, /* Do not use init code/data from exit code */ { .fromsec = { ALL_EXIT_SECTIONS, NULL }, .tosec = { ALL_INIT_SECTIONS, NULL }, .mismatch = ANY_EXIT_TO_ANY_INIT, + .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, }, /* Do not export init/exit functions or data */ { .fromsec = { "__ksymtab*", NULL }, .tosec = { INIT_SECTIONS, EXIT_SECTIONS, NULL }, - .mismatch = EXPORT_TO_INIT_EXIT + .mismatch = EXPORT_TO_INIT_EXIT, + .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, } }; @@ -985,7 +996,8 @@ static const struct sectioncheck *section_mismatch( * refsymname = __init_begin, _sinittext, _einittext * **/ -static int secref_whitelist(const char *fromsec, const char *fromsym, +static int secref_whitelist(const struct sectioncheck *mismatch, + const char *fromsec, const char *fromsym, const char *tosec, const char *tosym) { /* Check for pattern 1 */ @@ -997,7 +1009,7 @@ static int secref_whitelist(const char *fromsec, const char *fromsym, /* Check for pattern 2 */ if (match(tosec, init_exit_sections) && match(fromsec, data_sections) && - match(fromsym, symbol_white_list)) + match(fromsym, mismatch->symbol_white_list)) return 0; /* Check for pattern 3 */ @@ -1202,7 +1214,7 @@ static void report_sec_mismatch(const char *modname, fromsym, sec2annotation(tosec), tosym); break; case DATA_TO_ANY_INIT: { - const char **s = symbol_white_list; + const char *const *s = mismatch->symbol_white_list; fprintf(stderr, "The variable %s references\n" "the %s %s%s%s\n" @@ -1223,7 +1235,7 @@ static void report_sec_mismatch(const char *modname, fromsym, to, to, tosym, to_p, sec2annotation(tosec), tosym); break; case DATA_TO_ANY_EXIT: { - const char **s = symbol_white_list; + const char *const *s = mismatch->symbol_white_list; fprintf(stderr, "The variable %s references\n" "the %s %s%s%s\n" @@ -1304,7 +1316,8 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf, tosym = sym_name(elf, to); /* check whitelist - we may ignore it */ - if (secref_whitelist(fromsec, fromsym, tosec, tosym)) { + if (secref_whitelist(mismatch, + fromsec, fromsym, tosec, tosym)) { report_sec_mismatch(modname, mismatch, fromsec, r->r_offset, fromsym, is_function(from), tosec, tosym, -- cgit v1.1 From 0db252452378aa7a9e001a13226e1cd1dc61453d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Sat, 30 Jan 2010 21:14:23 +0100 Subject: modpost: don't allow *driver to reference .init.* MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Uwe Kleine-König --- scripts/mod/modpost.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 5dbe4db..3318692 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -862,11 +862,20 @@ const struct sectioncheck sectioncheck[] = { }, { .fromsec = { DATA_SECTIONS, NULL }, - .tosec = { ALL_INIT_SECTIONS, NULL }, + .tosec = { ALL_XXXINIT_SECTIONS, NULL }, .mismatch = DATA_TO_ANY_INIT, .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL }, }, { + .fromsec = { DATA_SECTIONS, NULL }, + .tosec = { INIT_SECTIONS, NULL }, + .mismatch = DATA_TO_ANY_INIT, + .symbol_white_list = { + "*_template", "*_timer", "*_sht", "*_ops", + "*_probe", "*_probe_one", "*_console", NULL + }, +}, +{ .fromsec = { TEXT_SECTIONS, NULL }, .tosec = { ALL_EXIT_SECTIONS, NULL }, .mismatch = TEXT_TO_ANY_EXIT, -- cgit v1.1 From 8626d3b4328061f5b82b11ae1d6918a0c3602f42 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Fri, 2 Apr 2010 01:05:27 +0000 Subject: phylib: Support phy module autoloading We don't use the normal hotplug mechanism because it doesn't work. It will load the module some time after the device appears, but that's not good enough for us -- we need the driver loaded _immediately_ because otherwise the NIC driver may just abort and then the phy 'device' goes away. [bwh: s/phy/mdio/ in module alias, kerneldoc for struct mdio_device_id] Signed-off-by: David Woodhouse Signed-off-by: Ben Hutchings Acked-by: Andy Fleming Signed-off-by: David S. Miller --- scripts/mod/file2alias.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'scripts/mod') diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 220213e..36a60a8 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -796,6 +796,28 @@ static int do_platform_entry(const char *filename, return 1; } +static int do_mdio_entry(const char *filename, + struct mdio_device_id *id, char *alias) +{ + int i; + + alias += sprintf(alias, MDIO_MODULE_PREFIX); + + for (i = 0; i < 32; i++) { + if (!((id->phy_id_mask >> (31-i)) & 1)) + *(alias++) = '?'; + else if ((id->phy_id >> (31-i)) & 1) + *(alias++) = '1'; + else + *(alias++) = '0'; + } + + /* Terminate the string */ + *alias = 0; + + return 1; +} + /* Ignore any prefix, eg. some architectures prepend _ */ static inline int sym_is(const char *symbol, const char *name) { @@ -943,6 +965,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, do_table(symval, sym->st_size, sizeof(struct platform_device_id), "platform", do_platform_entry, mod); + else if (sym_is(symname, "__mod_mdio_device_table")) + do_table(symval, sym->st_size, + sizeof(struct mdio_device_id), "mdio", + do_mdio_entry, mod); free(zeros); } -- cgit v1.1 From bf54a2b3c0dbf76136f00ff785bf6d8f6291311d Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 18 Nov 2008 21:13:53 +0100 Subject: m68k: amiga - Zorro bus modalias support Add Amiga Zorro bus modalias and uevent support Signed-off-by: Geert Uytterhoeven --- scripts/mod/file2alias.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'scripts/mod') diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 220213e..df90f31 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -796,6 +796,16 @@ static int do_platform_entry(const char *filename, return 1; } +/* Looks like: zorro:iN. */ +static int do_zorro_entry(const char *filename, struct zorro_device_id *id, + char *alias) +{ + id->id = TO_NATIVE(id->id); + strcpy(alias, "zorro:"); + ADD(alias, "i", id->id != ZORRO_WILDCARD, id->id); + return 1; +} + /* Ignore any prefix, eg. some architectures prepend _ */ static inline int sym_is(const char *symbol, const char *name) { @@ -943,6 +953,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, do_table(symval, sym->st_size, sizeof(struct platform_device_id), "platform", do_platform_entry, mod); + else if (sym_is(symname, "__mod_zorro_device_table")) + do_table(symval, sym->st_size, + sizeof(struct zorro_device_id), "zorro", + do_zorro_entry, mod); free(zeros); } -- cgit v1.1 From fedb3d27d9e8606b3867b5ae49d6258458a07a72 Mon Sep 17 00:00:00 2001 From: Ondrej Zary Date: Fri, 18 Dec 2009 20:52:39 +0100 Subject: MODULE_DEVICE_TABLE(isapnp, ...) does nothing On Monday 23 November 2009 04:29:53 Rusty Russell wrote: > On Mon, 23 Nov 2009 07:31:57 am Ondrej Zary wrote: > > The problem is that > > scripts/mod/file2alias.c simply ignores isapnp. > > AFAICT it always has, and noone has complained until now. Perhaps > something was still reading /lib/modules/`uname -r`/modules.isapnpmap? The patch below works fine (at least with Debian). It needs your first patch that moves the definitions to mod_devicetable.h. Verified that aliases for these modules are generated correctly: drivers/media/radio/radio-sf16fmi.c drivers/net/ne.c drivers/net/3c515.c drivers/net/smc-ultra.c drivers/pcmcia/i82365.c drivers/scsi/aha1542.c drivers/scsi/aha152x.c drivers/scsi/sym53c416.c drivers/scsi/g_NCR5380.c Tested with RTL8019AS (ne), AVA-1505AE (aha152x) and dtc436e (g_NCR5380) cards - they now work automatically. Generate pnp:d aliases for isapnp_device_tables. This allows udev to load these modules automatically. Signed-off-by: Ondrej Zary Signed-off-by: Rusty Russell --- scripts/mod/file2alias.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'scripts/mod') diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index df90f31..808c20d 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -806,6 +806,19 @@ static int do_zorro_entry(const char *filename, struct zorro_device_id *id, return 1; } +/* looks like: "pnp:dD" */ +static int do_isapnp_entry(const char *filename, + struct isapnp_device_id *id, char *alias) +{ + sprintf(alias, "pnp:d%c%c%c%x%x%x%x*", + 'A' + ((id->vendor >> 2) & 0x3f) - 1, + 'A' + (((id->vendor & 3) << 3) | ((id->vendor >> 13) & 7)) - 1, + 'A' + ((id->vendor >> 8) & 0x1f) - 1, + (id->function >> 4) & 0x0f, id->function & 0x0f, + (id->function >> 12) & 0x0f, (id->function >> 8) & 0x0f); + return 1; +} + /* Ignore any prefix, eg. some architectures prepend _ */ static inline int sym_is(const char *symbol, const char *name) { @@ -957,6 +970,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, do_table(symval, sym->st_size, sizeof(struct zorro_device_id), "zorro", do_zorro_entry, mod); + else if (sym_is(symname, "__mod_isapnp_device_table")) + do_table(symval, sym->st_size, + sizeof(struct isapnp_device_id), "isa", + do_isapnp_entry, mod); free(zeros); } -- cgit v1.1 From 1c938663d58b5b2965976a6f54cc51b5d6f691aa Mon Sep 17 00:00:00 2001 From: Krzysztof Halasa Date: Fri, 11 Jun 2010 01:08:20 +0200 Subject: kbuild: Fix modpost segfault MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Alan writes: > program: /home/alan/GitTrees/linux-2.6-mid-ref/scripts/mod/modpost -o > Module.symvers -S vmlinux.o > > Program received signal SIGSEGV, Segmentation fault. It just hit me. It's the offset calculation in reloc_location() which overflows: return (void *)elf->hdr + sechdrs[section].sh_offset + (r->r_offset - sechdrs[section].sh_addr); E.g. for the first rodata r entry: r->r_offset < sechdrs[section].sh_addr and the expression in the parenthesis produces 0xFFFFFFE0 or something equally wise. Reported-by: Alan Signed-off-by: Krzysztof Hałasa Tested-by: Alan Signed-off-by: Michal Marek --- scripts/mod/modpost.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 3318692..f877900 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -1342,7 +1342,7 @@ static unsigned int *reloc_location(struct elf_info *elf, int section = sechdr->sh_info; return (void *)elf->hdr + sechdrs[section].sh_offset + - (r->r_offset - sechdrs[section].sh_addr); + r->r_offset - sechdrs[section].sh_addr; } static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r) -- cgit v1.1 From 7fca5dc8aa7aaa6a1023bd3587901b88ebfe8154 Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Tue, 29 Jun 2010 20:08:42 +0000 Subject: powerpc: Fix module building for gcc 4.5 and 64 bit Gcc 4.5 is now generating out of line register save and restore in the function prefix and postfix when we use -Os. Signed-off-by: Stephen Rothwell Signed-off-by: Benjamin Herrenschmidt --- scripts/mod/modpost.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index f877900..f6127b9 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -503,6 +503,11 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname) strncmp(symname, "_rest32gpr_", sizeof("_rest32gpr_") - 1) == 0 || strncmp(symname, "_save32gpr_", sizeof("_save32gpr_") - 1) == 0) return 1; + if (info->hdr->e_machine == EM_PPC64) + /* Special register function linked on all modules during final link of .ko */ + if (strncmp(symname, "_restgpr0_", sizeof("_restgpr0_") - 1) == 0 || + strncmp(symname, "_savegpr0_", sizeof("_savegpr0_") - 1) == 0) + return 1; /* Do not ignore this symbol */ return 0; } -- cgit v1.1 From 1ce53adf13a54375d2a5c7cdbe341b2558389615 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Thu, 29 Jul 2010 01:47:53 +0200 Subject: modpost: support objects with more than 64k sections This patch makes modpost able to process object files with more than 64k sections. Needed for huge kernel builds (allyesconfig, for example) with -ffunction-sections. 64k sections handling is covered, for example, by this document: "IA-64 gABI Proposal 74: Section Indexes" http://www.codesourcery.com/public/cxx-abi/abi/prop-74-sindex.html Signed-off-by: Denys Vlasenko Signed-off-by: Anders Kaseorg Acked-by: Sam Ravnborg Cc: Rusty Russell Cc: Andi Kleen Signed-off-by: Michal Marek --- scripts/mod/file2alias.c | 6 +-- scripts/mod/modpost.c | 102 +++++++++++++++++++++++++++++++++++------------ scripts/mod/modpost.h | 43 ++++++++++++++++++++ 3 files changed, 122 insertions(+), 29 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 220213e..33f4363 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -839,16 +839,16 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, char *zeros = NULL; /* We're looking for a section relative symbol */ - if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum) + if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections) return; /* Handle all-NULL symbols allocated into .bss */ - if (info->sechdrs[sym->st_shndx].sh_type & SHT_NOBITS) { + if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) { zeros = calloc(1, sym->st_size); symval = zeros; } else { symval = (void *)info->hdr - + info->sechdrs[sym->st_shndx].sh_offset + + info->sechdrs[get_secindex(info, sym)].sh_offset + sym->st_value; } diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 3318692..7249ab4 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -253,7 +253,7 @@ static enum export export_no(const char *s) return export_unknown; } -static enum export export_from_sec(struct elf_info *elf, Elf_Section sec) +static enum export export_from_sec(struct elf_info *elf, unsigned int sec) { if (sec == elf->export_sec) return export_plain; @@ -373,6 +373,8 @@ static int parse_elf(struct elf_info *info, const char *filename) Elf_Ehdr *hdr; Elf_Shdr *sechdrs; Elf_Sym *sym; + const char *secstrings; + unsigned int symtab_idx = ~0U, symtab_shndx_idx = ~0U; hdr = grab_file(filename, &info->size); if (!hdr) { @@ -417,8 +419,27 @@ static int parse_elf(struct elf_info *info, const char *filename) return 0; } + if (hdr->e_shnum == 0) { + /* + * There are more than 64k sections, + * read count from .sh_size. + * note: it doesn't need shndx2secindex() + */ + info->num_sections = TO_NATIVE(sechdrs[0].sh_size); + } + else { + info->num_sections = hdr->e_shnum; + } + if (hdr->e_shstrndx == SHN_XINDEX) { + info->secindex_strings = + shndx2secindex(TO_NATIVE(sechdrs[0].sh_link)); + } + else { + info->secindex_strings = hdr->e_shstrndx; + } + /* Fix endianness in section headers */ - for (i = 0; i < hdr->e_shnum; i++) { + for (i = 0; i < info->num_sections; i++) { sechdrs[i].sh_name = TO_NATIVE(sechdrs[i].sh_name); sechdrs[i].sh_type = TO_NATIVE(sechdrs[i].sh_type); sechdrs[i].sh_flags = TO_NATIVE(sechdrs[i].sh_flags); @@ -431,9 +452,8 @@ static int parse_elf(struct elf_info *info, const char *filename) sechdrs[i].sh_entsize = TO_NATIVE(sechdrs[i].sh_entsize); } /* Find symbol table. */ - for (i = 1; i < hdr->e_shnum; i++) { - const char *secstrings - = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; + secstrings = (void *)hdr + sechdrs[info->secindex_strings].sh_offset; + for (i = 1; i < info->num_sections; i++) { const char *secname; int nobits = sechdrs[i].sh_type == SHT_NOBITS; @@ -461,14 +481,26 @@ static int parse_elf(struct elf_info *info, const char *filename) else if (strcmp(secname, "__ksymtab_gpl_future") == 0) info->export_gpl_future_sec = i; - if (sechdrs[i].sh_type != SHT_SYMTAB) - continue; + if (sechdrs[i].sh_type == SHT_SYMTAB) { + unsigned int sh_link_idx; + symtab_idx = i; + info->symtab_start = (void *)hdr + + sechdrs[i].sh_offset; + info->symtab_stop = (void *)hdr + + sechdrs[i].sh_offset + sechdrs[i].sh_size; + sh_link_idx = shndx2secindex(sechdrs[i].sh_link); + info->strtab = (void *)hdr + + sechdrs[sh_link_idx].sh_offset; + } - info->symtab_start = (void *)hdr + sechdrs[i].sh_offset; - info->symtab_stop = (void *)hdr + sechdrs[i].sh_offset - + sechdrs[i].sh_size; - info->strtab = (void *)hdr + - sechdrs[sechdrs[i].sh_link].sh_offset; + /* 32bit section no. table? ("more than 64k sections") */ + if (sechdrs[i].sh_type == SHT_SYMTAB_SHNDX) { + symtab_shndx_idx = i; + info->symtab_shndx_start = (void *)hdr + + sechdrs[i].sh_offset; + info->symtab_shndx_stop = (void *)hdr + + sechdrs[i].sh_offset + sechdrs[i].sh_size; + } } if (!info->symtab_start) fatal("%s has no symtab?\n", filename); @@ -480,6 +512,21 @@ static int parse_elf(struct elf_info *info, const char *filename) sym->st_value = TO_NATIVE(sym->st_value); sym->st_size = TO_NATIVE(sym->st_size); } + + if (symtab_shndx_idx != ~0U) { + Elf32_Word *p; + if (symtab_idx != + shndx2secindex(sechdrs[symtab_shndx_idx].sh_link)) + fatal("%s: SYMTAB_SHNDX has bad sh_link: %u!=%u\n", + filename, + shndx2secindex(sechdrs[symtab_shndx_idx].sh_link), + symtab_idx); + /* Fix endianness */ + for (p = info->symtab_shndx_start; p < info->symtab_shndx_stop; + p++) + *p = TO_NATIVE(*p); + } + return 1; } @@ -514,7 +561,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info, Elf_Sym *sym, const char *symname) { unsigned int crc; - enum export export = export_from_sec(info, sym->st_shndx); + enum export export = export_from_sec(info, get_secindex(info, sym)); switch (sym->st_shndx) { case SHN_COMMON: @@ -656,19 +703,19 @@ static const char *sym_name(struct elf_info *elf, Elf_Sym *sym) return "(unknown)"; } -static const char *sec_name(struct elf_info *elf, int shndx) +static const char *sec_name(struct elf_info *elf, int secindex) { Elf_Shdr *sechdrs = elf->sechdrs; return (void *)elf->hdr + - elf->sechdrs[elf->hdr->e_shstrndx].sh_offset + - sechdrs[shndx].sh_name; + elf->sechdrs[elf->secindex_strings].sh_offset + + sechdrs[secindex].sh_name; } static const char *sech_name(struct elf_info *elf, Elf_Shdr *sechdr) { return (void *)elf->hdr + - elf->sechdrs[elf->hdr->e_shstrndx].sh_offset + - sechdr->sh_name; + elf->sechdrs[elf->secindex_strings].sh_offset + + sechdr->sh_name; } /* if sym is empty or point to a string @@ -1047,11 +1094,14 @@ static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf64_Sword addr, Elf_Sym *near = NULL; Elf64_Sword distance = 20; Elf64_Sword d; + unsigned int relsym_secindex; if (relsym->st_name != 0) return relsym; + + relsym_secindex = get_secindex(elf, relsym); for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) { - if (sym->st_shndx != relsym->st_shndx) + if (get_secindex(elf, sym) != relsym_secindex) continue; if (ELF_ST_TYPE(sym->st_info) == STT_SECTION) continue; @@ -1113,9 +1163,9 @@ static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr, for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) { const char *symsec; - if (sym->st_shndx >= SHN_LORESERVE) + if (is_shndx_special(sym->st_shndx)) continue; - symsec = sec_name(elf, sym->st_shndx); + symsec = sec_name(elf, get_secindex(elf, sym)); if (strcmp(symsec, sec) != 0) continue; if (!is_valid_name(elf, sym)) @@ -1311,7 +1361,7 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf, const char *tosec; const struct sectioncheck *mismatch; - tosec = sec_name(elf, sym->st_shndx); + tosec = sec_name(elf, get_secindex(elf, sym)); mismatch = section_mismatch(fromsec, tosec); if (mismatch) { Elf_Sym *to; @@ -1339,7 +1389,7 @@ static unsigned int *reloc_location(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r) { Elf_Shdr *sechdrs = elf->sechdrs; - int section = sechdr->sh_info; + int section = shndx2secindex(sechdr->sh_info); return (void *)elf->hdr + sechdrs[section].sh_offset + (r->r_offset - sechdrs[section].sh_addr); @@ -1447,7 +1497,7 @@ static void section_rela(const char *modname, struct elf_info *elf, r.r_addend = TO_NATIVE(rela->r_addend); sym = elf->symtab_start + r_sym; /* Skip special sections */ - if (sym->st_shndx >= SHN_LORESERVE) + if (is_shndx_special(sym->st_shndx)) continue; check_section_mismatch(modname, elf, &r, sym, fromsec); } @@ -1505,7 +1555,7 @@ static void section_rel(const char *modname, struct elf_info *elf, } sym = elf->symtab_start + r_sym; /* Skip special sections */ - if (sym->st_shndx >= SHN_LORESERVE) + if (is_shndx_special(sym->st_shndx)) continue; check_section_mismatch(modname, elf, &r, sym, fromsec); } @@ -1530,7 +1580,7 @@ static void check_sec_ref(struct module *mod, const char *modname, Elf_Shdr *sechdrs = elf->sechdrs; /* Walk through all sections */ - for (i = 0; i < elf->hdr->e_shnum; i++) { + for (i = 0; i < elf->num_sections; i++) { check_section(modname, elf, &elf->sechdrs[i]); /* We want to process only relocation sections and not .init */ if (sechdrs[i].sh_type == SHT_RELA) diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h index be987a4..0388cfcc 100644 --- a/scripts/mod/modpost.h +++ b/scripts/mod/modpost.h @@ -129,8 +129,51 @@ struct elf_info { const char *strtab; char *modinfo; unsigned int modinfo_len; + + /* support for 32bit section numbers */ + + unsigned int num_sections; /* max_secindex + 1 */ + unsigned int secindex_strings; + /* if Nth symbol table entry has .st_shndx = SHN_XINDEX, + * take shndx from symtab_shndx_start[N] instead */ + Elf32_Word *symtab_shndx_start; + Elf32_Word *symtab_shndx_stop; }; +static inline int is_shndx_special(unsigned int i) +{ + return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE; +} + +/* shndx is in [0..SHN_LORESERVE) U (SHN_HIRESERVE, 0xfffffff], thus: + * shndx == 0 <=> sechdrs[0] + * ...... + * shndx == SHN_LORESERVE-1 <=> sechdrs[SHN_LORESERVE-1] + * shndx == SHN_HIRESERVE+1 <=> sechdrs[SHN_LORESERVE] + * shndx == SHN_HIRESERVE+2 <=> sechdrs[SHN_LORESERVE+1] + * ...... + * fyi: sym->st_shndx is uint16, SHN_LORESERVE = ff00, SHN_HIRESERVE = ffff, + * so basically we map 0000..feff -> 0000..feff + * ff00..ffff -> (you are a bad boy, dont do it) + * 10000..xxxx -> ff00..(xxxx-0x100) + */ +static inline unsigned int shndx2secindex(unsigned int i) +{ + if (i <= SHN_HIRESERVE) + return i; + return i - (SHN_HIRESERVE + 1 - SHN_LORESERVE); +} + +/* Accessor for sym->st_shndx, hides ugliness of "64k sections" */ +static inline unsigned int get_secindex(const struct elf_info *info, + const Elf_Sym *sym) +{ + if (sym->st_shndx != SHN_XINDEX) + return sym->st_shndx; + return shndx2secindex(info->symtab_shndx_start[sym - + info->symtab_start]); +} + /* file2alias.c */ extern unsigned int cross_build; void handle_moddevtable(struct module *mod, struct elf_info *info, -- cgit v1.1 From 37ed19d5cce35a40d3913cf9aa208ce9f60db3d7 Mon Sep 17 00:00:00 2001 From: Alexey Fomenko Date: Mon, 9 Aug 2010 17:20:24 -0700 Subject: scripts/mod/modpost.c: fix memory leak sec2annotation returns malloc'ed buffer directly to printf as an argument. Free this buffer after printing. Signed-off-by: Alexey Fomenko Cc: Trevor Keith Cc: Rusty Russell Cc: Michal Marek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/mod/modpost.c | 54 ++++++++++++++++++++++++++++++++++++++------------- 1 file changed, 40 insertions(+), 14 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index c827309..1ce655d 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -1245,6 +1245,8 @@ static void report_sec_mismatch(const char *modname, { const char *from, *from_p; const char *to, *to_p; + char *prl_from; + char *prl_to; switch (from_is_func) { case 0: from = "variable"; from_p = ""; break; @@ -1268,16 +1270,21 @@ static void report_sec_mismatch(const char *modname, switch (mismatch->mismatch) { case TEXT_TO_ANY_INIT: + prl_from = sec2annotation(fromsec); + prl_to = sec2annotation(tosec); fprintf(stderr, "The function %s%s() references\n" "the %s %s%s%s.\n" "This is often because %s lacks a %s\n" "annotation or the annotation of %s is wrong.\n", - sec2annotation(fromsec), fromsym, - to, sec2annotation(tosec), tosym, to_p, - fromsym, sec2annotation(tosec), tosym); + prl_from, fromsym, + to, prl_to, tosym, to_p, + fromsym, prl_to, tosym); + free(prl_from); + free(prl_to); break; case DATA_TO_ANY_INIT: { + prl_to = sec2annotation(tosec); const char *const *s = mismatch->symbol_white_list; fprintf(stderr, "The variable %s references\n" @@ -1285,20 +1292,24 @@ static void report_sec_mismatch(const char *modname, "If the reference is valid then annotate the\n" "variable with __init* or __refdata (see linux/init.h) " "or name the variable:\n", - fromsym, to, sec2annotation(tosec), tosym, to_p); + fromsym, to, prl_to, tosym, to_p); while (*s) fprintf(stderr, "%s, ", *s++); fprintf(stderr, "\n"); + free(prl_to); break; } case TEXT_TO_ANY_EXIT: + prl_to = sec2annotation(tosec); fprintf(stderr, "The function %s() references a %s in an exit section.\n" "Often the %s %s%s has valid usage outside the exit section\n" "and the fix is to remove the %sannotation of %s.\n", - fromsym, to, to, tosym, to_p, sec2annotation(tosec), tosym); + fromsym, to, to, tosym, to_p, prl_to, tosym); + free(prl_to); break; case DATA_TO_ANY_EXIT: { + prl_to = sec2annotation(tosec); const char *const *s = mismatch->symbol_white_list; fprintf(stderr, "The variable %s references\n" @@ -1306,24 +1317,31 @@ static void report_sec_mismatch(const char *modname, "If the reference is valid then annotate the\n" "variable with __exit* (see linux/init.h) or " "name the variable:\n", - fromsym, to, sec2annotation(tosec), tosym, to_p); + fromsym, to, prl_to, tosym, to_p); while (*s) fprintf(stderr, "%s, ", *s++); fprintf(stderr, "\n"); + free(prl_to); break; } case XXXINIT_TO_SOME_INIT: case XXXEXIT_TO_SOME_EXIT: + prl_from = sec2annotation(fromsec); + prl_to = sec2annotation(tosec); fprintf(stderr, "The %s %s%s%s references\n" "a %s %s%s%s.\n" "If %s is only used by %s then\n" "annotate %s with a matching annotation.\n", - from, sec2annotation(fromsec), fromsym, from_p, - to, sec2annotation(tosec), tosym, to_p, + from, prl_from, fromsym, from_p, + to, prl_to, tosym, to_p, tosym, fromsym, tosym); + free(prl_from); + free(prl_to); break; case ANY_INIT_TO_ANY_EXIT: + prl_from = sec2annotation(fromsec); + prl_to = sec2annotation(tosec); fprintf(stderr, "The %s %s%s%s references\n" "a %s %s%s%s.\n" @@ -1332,11 +1350,15 @@ static void report_sec_mismatch(const char *modname, "uses functionality in the exit path.\n" "The fix is often to remove the %sannotation of\n" "%s%s so it may be used outside an exit section.\n", - from, sec2annotation(fromsec), fromsym, from_p, - to, sec2annotation(tosec), tosym, to_p, + from, prl_from, fromsym, from_p, + to, prl_to, tosym, to_p, sec2annotation(tosec), tosym, to_p); + free(prl_from); + free(prl_to); break; case ANY_EXIT_TO_ANY_INIT: + prl_from = sec2annotation(fromsec); + prl_to = sec2annotation(tosec); fprintf(stderr, "The %s %s%s%s references\n" "a %s %s%s%s.\n" @@ -1345,16 +1367,20 @@ static void report_sec_mismatch(const char *modname, "uses functionality in the init path.\n" "The fix is often to remove the %sannotation of\n" "%s%s so it may be used outside an init section.\n", - from, sec2annotation(fromsec), fromsym, from_p, - to, sec2annotation(tosec), tosym, to_p, - sec2annotation(tosec), tosym, to_p); + from, prl_from, fromsym, from_p, + to, prl_to, tosym, to_p, + prl_to, tosym, to_p); + free(prl_from); + free(prl_to); break; case EXPORT_TO_INIT_EXIT: + prl_to = sec2annotation(tosec); fprintf(stderr, "The symbol %s is exported and annotated %s\n" "Fix this by removing the %sannotation of %s " "or drop the export.\n", - tosym, sec2annotation(tosec), sec2annotation(tosec), tosym); + tosym, prl_to, prl_to, tosym); + free(prl_to); break; } fprintf(stderr, "\n"); -- cgit v1.1 From 6a841528d288ac420052f5c98fd426b0fcdc5b52 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Wed, 11 Aug 2010 23:04:16 -0600 Subject: param: silence .init.text references from param ops Ideally, we'd check that it was only the "set" function which was __init, and that the permissions were r/o. But that's a little hard. Signed-off-by: Rusty Russell Acked-by: Sam Ravnborg Tested-by: Phil Carmody --- scripts/mod/modpost.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 1ce655d..b160440 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -1033,6 +1033,13 @@ static const struct sectioncheck *section_mismatch( * fromsec = .data* * atsym =__param* * + * Pattern 1a: + * module_param_call() ops can refer to __init set function if permissions=0 + * The pattern is identified by: + * tosec = .init.text + * fromsec = .data* + * atsym = __param_ops_* + * * Pattern 2: * Many drivers utilise a *driver container with references to * add, remove, probe functions etc. @@ -1067,6 +1074,12 @@ static int secref_whitelist(const struct sectioncheck *mismatch, (strncmp(fromsym, "__param", strlen("__param")) == 0)) return 0; + /* Check for pattern 1a */ + if (strcmp(tosec, ".init.text") == 0 && + match(fromsec, data_sections) && + (strncmp(fromsym, "__param_ops_", strlen("__param_ops_")) == 0)) + return 0; + /* Check for pattern 2 */ if (match(tosec, init_exit_sections) && match(fromsec, data_sections) && -- cgit v1.1 From 5003bab82d56754b27be01eef24495a02e00039d Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Wed, 11 Aug 2010 00:42:26 -0700 Subject: fix "scripts/mod/modpost.c: fix memory leak" Fix error introduced by 37ed19d5cce35a40d3913cf9aa208ce9f60db3d7 ("scripts/mod/modpost.c: fix memory leak"). - don't kfree("") - fix one missed conversion Reported-by: Stephen Rothwell Tested-by: Stephen Rothwell Cc: Alexey Fomenko Cc: Trevor Keith Cc: Rusty Russell Cc: Michal Marek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/mod/modpost.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 1ce655d..7acbdd8 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -14,6 +14,7 @@ #define _GNU_SOURCE #include #include +#include #include "modpost.h" #include "../../include/generated/autoconf.h" #include "../../include/linux/license.h" @@ -1217,7 +1218,7 @@ static char *sec2annotation(const char *s) strcat(p, " "); return r; /* we leak her but we do not care */ } else { - return ""; + return strdup(""); } } @@ -1352,7 +1353,7 @@ static void report_sec_mismatch(const char *modname, "%s%s so it may be used outside an exit section.\n", from, prl_from, fromsym, from_p, to, prl_to, tosym, to_p, - sec2annotation(tosec), tosym, to_p); + prl_to, tosym, to_p); free(prl_from); free(prl_to); break; -- cgit v1.1 From 019fca84e7c4b94817abc77df9081ba208fcc46a Mon Sep 17 00:00:00 2001 From: David Howells Date: Thu, 12 Aug 2010 16:54:47 +0100 Subject: MN10300: Permit .GCC-command-line sections Permit .GCC-command-line sections in modules. Otherwise modpost says things like: WARNING: drivers/mtd/chips/map_ram.o (.GCC-command-line): unexpected non-allocatable section. Did you forget to use "ax"/"aw" in a .S file? Note that for example contains section definitions for use in .S files. Signed-off-by: David Howells Signed-off-by: Linus Torvalds --- scripts/mod/modpost.c | 1 + 1 file changed, 1 insertion(+) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 7acbdd8..253c107 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -790,6 +790,7 @@ static const char *section_white_list[] = { ".comment*", ".debug*", + ".GCC-command-line", /* mn10300 */ ".mdebug*", /* alpha, score, mips etc. */ ".pdr", /* alpha, score, mips etc. */ ".stab*", -- cgit v1.1 From cbcf14a942eb06d031628046739b983e84b383bf Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 17 Aug 2010 13:36:40 +0300 Subject: scripts/mod/modpost.c: fix commentary accordingly to last changes The last commits 37ed19d5cce35a40d3913cf9aa208ce9f60db3d7 5003bab82d56754b27be01eef24495a02e00039d have introduced new behaviour of sec2annotation() method. However, the commentary inside the method was left as before. Let's fix it accordingly. Signed-off-by: Andy Shevchenko Cc: Rusty Russell Cc: Andrew Morton Acked-by: WANG Cong Signed-off-by: Michal Marek --- scripts/mod/modpost.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index c827309..859bee4 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -1193,6 +1193,9 @@ static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr, * .cpuinit.data => __cpudata * .memexitconst => __memconst * etc. + * + * The memory of returned value has been allocated on a heap. The user of this + * method should free it after usage. */ static char *sec2annotation(const char *s) { @@ -1215,7 +1218,7 @@ static char *sec2annotation(const char *s) strcat(p, "data "); else strcat(p, " "); - return r; /* we leak her but we do not care */ + return r; } else { return ""; } -- cgit v1.1 From 1121584f5db8a99a7ad94c6c5d62431b3187ad98 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Wed, 15 Dec 2010 17:11:22 -0800 Subject: modpost: Put .zdebug* section on white list "as --compress-debug-sections" will generate compressed debug sections with section names ".zdebug*". This patch puts .zdebug* section on white list. Signed-off-by: H.J. Lu Signed-off-by: Michal Marek --- scripts/mod/modpost.c | 1 + 1 file changed, 1 insertion(+) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 33122ca..194e2c4 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -790,6 +790,7 @@ static const char *section_white_list[] = { ".comment*", ".debug*", + ".zdebug*", /* Compressed debug sections. */ ".GCC-command-line", /* mn10300 */ ".mdebug*", /* alpha, score, mips etc. */ ".pdr", /* alpha, score, mips etc. */ -- cgit v1.1 From 731ece41fb1047816303295a0cdfed90a528137e Mon Sep 17 00:00:00 2001 From: Olof Johansson Date: Fri, 10 Dec 2010 02:09:23 -0600 Subject: modpost: Fix address calculation in reloc_location() This patch fixes a segfault in modpost that is observed when the gold linker is used to link the input objects. The problem is that reloc_location (modpost.c) is computing the address of the relocation target incorrectly. Here, elf->hdr points to the beginning of the ELF file in memory, sechdr points to the relocation section header, section is the index of the section being relocated, and sechdrs[section].sh_offset would be the offset of that section, relative to the beginning of the ELF file. Adding elf->hdr + sechdrs[section].sh_offset gives you the address of the beginning of the section, and adding r->r_offset to that gives you the address of the location to be relocated. You do not need to subtract sechdrs[section].sh_addr from that -- the result of this is an address outside the file, and causes the segfault when addend_386_rel tries to dereference it. This bug is not observed when GNU ld is used to link the inputs. The object file ubuntu/omnibook/omnibook.o is the result of an ld -r of several other files. When GNU ld does an ld -r, it sets the vaddr field for each section to 0, but gold lays out the section addresses sequentially instead: Section Headers: [Nr] Name Type Addr Off Size ES Flg Lk Inf Al [ 0] NULL 00000000 000000 000000 00 0 0 0 [ 1] .text PROGBITS 00000000 000034 004794 00 AX 0 0 4 [ 2] .data PROGBITS 0000b9d0 0047c8 0009c0 00 WA 0 0 4 [ 3] .bss NOBITS 000162f8 005188 00013c 00 WA 0 0 4 [ 4] .rodata.str1.1 PROGBITS 00004f2d 0052c4 001b1a 01 AMS 0 0 1 [ 5] .init.text PROGBITS 00004794 006dde 0005fa 00 AX 0 0 1 [ 6] .exit.text PROGBITS 00004d8e 0073d8 00018a 00 AX 0 0 1 ... So the bug in the tool remained undiscovered because the section's vaddr always happened to be 0. Signed-off-by: Raymes Khoury Signed-off-by: Olof Johansson Signed-off-by: Michal Marek --- scripts/mod/modpost.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'scripts/mod') diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 194e2c4..97d2259 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -1442,7 +1442,7 @@ static unsigned int *reloc_location(struct elf_info *elf, int section = shndx2secindex(sechdr->sh_info); return (void *)elf->hdr + sechdrs[section].sh_offset + - r->r_offset - sechdrs[section].sh_addr; + r->r_offset; } static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r) -- cgit v1.1