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mod/file2alias: make modalias generation safe for cross compiling

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Use the target compiler to compute the offsets for the fields of the
device_id structures, so that it won't be broken by different alignments
between the host and target ABIs.

This also fixes missing endian corrections for some modaliases.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Andreas Schwab
2013-01-20 17:58:47 +01:00
committed by Michal Marek
parent a49f0d1ea3
commit 6543becf26
8 changed files with 590 additions and 367 deletions
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7
scripts/Makefile.modpost
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@@ -66,10 +66,6 @@ modules := $(patsubst %.o,%.ko, $(wildcard $(__modules:.ko=.o)))
# Stop after building .o files if NOFINAL is set. Makes compile tests quicker
_modpost: $(if $(KBUILD_MODPOST_NOFINAL), $(modules:.ko:.o),$(modules))
ifneq ($(KBUILD_BUILDHOST),$(ARCH))
cross_build := 1
endif
# Step 2), invoke modpost
# Includes step 3,4
modpost = scripts/mod/modpost \
@@ -80,8 +76,7 @@ modpost = scripts/mod/modpost \
$(if $(KBUILD_EXTRA_SYMBOLS), $(patsubst %, -e %,$(KBUILD_EXTRA_SYMBOLS))) \
$(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \
$(if $(CONFIG_DEBUG_SECTION_MISMATCH),,-S) \
$(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w) \
$(if $(cross_build),-c)
$(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w)
quiet_cmd_modpost = MODPOST $(words $(filter-out vmlinux FORCE, $^)) modules
cmd_modpost = $(modpost) -s

1
scripts/mod/.gitignore vendored
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@@ -1,4 +1,5 @@
elfconfig.h
mk_elfconfig
modpost
devicetable-offsets.h

35
scripts/mod/Makefile
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@@ -3,9 +3,44 @@ always := $(hostprogs-y) empty.o
modpost-objs := modpost.o file2alias.o sumversion.o
devicetable-offsets-file := devicetable-offsets.h
define sed-y
"/^->/{s:->#\(.*\):/* \1 */:; \
s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
s:->::; p;}"
endef
quiet_cmd_offsets = GEN $@
define cmd_offsets
(set -e; \
echo "#ifndef __DEVICEVTABLE_OFFSETS_H__"; \
echo "#define __DEVICEVTABLE_OFFSETS_H__"; \
echo "/*"; \
echo " * DO NOT MODIFY."; \
echo " *"; \
echo " * This file was generated by Kbuild"; \
echo " *"; \
echo " */"; \
echo ""; \
sed -ne $(sed-y) $<; \
echo ""; \
echo "#endif" ) > $@
endef
# We use internal kbuild rules to avoid the "is up to date" message from make
scripts/mod/devicetable-offsets.s: scripts/mod/devicetable-offsets.c FORCE
$(Q)mkdir -p $(dir $@)
$(call if_changed_dep,cc_s_c)
$(obj)/$(devicetable-offsets-file): scripts/mod/devicetable-offsets.s
$(call cmd,offsets)
# dependencies on generated files need to be listed explicitly
$(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o: $(obj)/elfconfig.h
$(obj)/file2alias.o: $(obj)/$(devicetable-offsets-file)
quiet_cmd_elfconfig = MKELF $@
cmd_elfconfig = $(obj)/mk_elfconfig < $< > $@

178
scripts/mod/devicetable-offsets.c Normal file
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@@ -0,0 +1,178 @@
#include <linux/kbuild.h>
#include <linux/mod_devicetable.h>
#define DEVID(devid) DEFINE(SIZE_##devid, sizeof(struct devid))
#define DEVID_FIELD(devid, field) \
DEFINE(OFF_##devid##_##field, offsetof(struct devid, field))
int main(void)
{
DEVID(usb_device_id);
DEVID_FIELD(usb_device_id, match_flags);
DEVID_FIELD(usb_device_id, idVendor);
DEVID_FIELD(usb_device_id, idProduct);
DEVID_FIELD(usb_device_id, bcdDevice_lo);
DEVID_FIELD(usb_device_id, bcdDevice_hi);
DEVID_FIELD(usb_device_id, bDeviceClass);
DEVID_FIELD(usb_device_id, bDeviceSubClass);
DEVID_FIELD(usb_device_id, bDeviceProtocol);
DEVID_FIELD(usb_device_id, bInterfaceClass);
DEVID_FIELD(usb_device_id, bInterfaceSubClass);
DEVID_FIELD(usb_device_id, bInterfaceProtocol);
DEVID_FIELD(usb_device_id, bInterfaceNumber);
DEVID(hid_device_id);
DEVID_FIELD(hid_device_id, bus);
DEVID_FIELD(hid_device_id, group);
DEVID_FIELD(hid_device_id, vendor);
DEVID_FIELD(hid_device_id, product);
DEVID(ieee1394_device_id);
DEVID_FIELD(ieee1394_device_id, match_flags);
DEVID_FIELD(ieee1394_device_id, vendor_id);
DEVID_FIELD(ieee1394_device_id, model_id);
DEVID_FIELD(ieee1394_device_id, specifier_id);
DEVID_FIELD(ieee1394_device_id, version);
DEVID(pci_device_id);
DEVID_FIELD(pci_device_id, vendor);
DEVID_FIELD(pci_device_id, device);
DEVID_FIELD(pci_device_id, subvendor);
DEVID_FIELD(pci_device_id, subdevice);
DEVID_FIELD(pci_device_id, class);
DEVID_FIELD(pci_device_id, class_mask);
DEVID(ccw_device_id);
DEVID_FIELD(ccw_device_id, match_flags);
DEVID_FIELD(ccw_device_id, cu_type);
DEVID_FIELD(ccw_device_id, cu_model);
DEVID_FIELD(ccw_device_id, dev_type);
DEVID_FIELD(ccw_device_id, dev_model);
DEVID(ap_device_id);
DEVID_FIELD(ap_device_id, dev_type);
DEVID(css_device_id);
DEVID_FIELD(css_device_id, type);
DEVID(serio_device_id);
DEVID_FIELD(serio_device_id, type);
DEVID_FIELD(serio_device_id, proto);
DEVID_FIELD(serio_device_id, id);
DEVID_FIELD(serio_device_id, extra);
DEVID(acpi_device_id);
DEVID_FIELD(acpi_device_id, id);
DEVID(pnp_device_id);
DEVID_FIELD(pnp_device_id, id);
DEVID(pnp_card_device_id);
DEVID_FIELD(pnp_card_device_id, devs);
DEVID(pcmcia_device_id);
DEVID_FIELD(pcmcia_device_id, match_flags);
DEVID_FIELD(pcmcia_device_id, manf_id);
DEVID_FIELD(pcmcia_device_id, card_id);
DEVID_FIELD(pcmcia_device_id, func_id);
DEVID_FIELD(pcmcia_device_id, function);
DEVID_FIELD(pcmcia_device_id, device_no);
DEVID_FIELD(pcmcia_device_id, prod_id_hash);
DEVID(of_device_id);
DEVID_FIELD(of_device_id, name);
DEVID_FIELD(of_device_id, type);
DEVID_FIELD(of_device_id, compatible);
DEVID(vio_device_id);
DEVID_FIELD(vio_device_id, type);
DEVID_FIELD(vio_device_id, compat);
DEVID(input_device_id);
DEVID_FIELD(input_device_id, flags);
DEVID_FIELD(input_device_id, bustype);
DEVID_FIELD(input_device_id, vendor);
DEVID_FIELD(input_device_id, product);
DEVID_FIELD(input_device_id, version);
DEVID_FIELD(input_device_id, evbit);
DEVID_FIELD(input_device_id, keybit);
DEVID_FIELD(input_device_id, relbit);
DEVID_FIELD(input_device_id, absbit);
DEVID_FIELD(input_device_id, mscbit);
DEVID_FIELD(input_device_id, ledbit);
DEVID_FIELD(input_device_id, sndbit);
DEVID_FIELD(input_device_id, ffbit);
DEVID_FIELD(input_device_id, swbit);
DEVID(eisa_device_id);
DEVID_FIELD(eisa_device_id, sig);
DEVID(parisc_device_id);
DEVID_FIELD(parisc_device_id, hw_type);
DEVID_FIELD(parisc_device_id, hversion);
DEVID_FIELD(parisc_device_id, hversion_rev);
DEVID_FIELD(parisc_device_id, sversion);
DEVID(sdio_device_id);
DEVID_FIELD(sdio_device_id, class);
DEVID_FIELD(sdio_device_id, vendor);
DEVID_FIELD(sdio_device_id, device);
DEVID(ssb_device_id);
DEVID_FIELD(ssb_device_id, vendor);
DEVID_FIELD(ssb_device_id, coreid);
DEVID_FIELD(ssb_device_id, revision);
DEVID(bcma_device_id);
DEVID_FIELD(bcma_device_id, manuf);
DEVID_FIELD(bcma_device_id, id);
DEVID_FIELD(bcma_device_id, rev);
DEVID_FIELD(bcma_device_id, class);
DEVID(virtio_device_id);
DEVID_FIELD(virtio_device_id, device);
DEVID_FIELD(virtio_device_id, vendor);
DEVID(hv_vmbus_device_id);
DEVID_FIELD(hv_vmbus_device_id, guid);
DEVID(i2c_device_id);
DEVID_FIELD(i2c_device_id, name);
DEVID(spi_device_id);
DEVID_FIELD(spi_device_id, name);
DEVID(dmi_system_id);
DEVID_FIELD(dmi_system_id, matches);
DEVID(platform_device_id);
DEVID_FIELD(platform_device_id, name);
DEVID(mdio_device_id);
DEVID_FIELD(mdio_device_id, phy_id);
DEVID_FIELD(mdio_device_id, phy_id_mask);
DEVID(zorro_device_id);
DEVID_FIELD(zorro_device_id, id);
DEVID(isapnp_device_id);
DEVID_FIELD(isapnp_device_id, vendor);
DEVID_FIELD(isapnp_device_id, function);
DEVID(ipack_device_id);
DEVID_FIELD(ipack_device_id, format);
DEVID_FIELD(ipack_device_id, vendor);
DEVID_FIELD(ipack_device_id, device);
DEVID(amba_id);
DEVID_FIELD(amba_id, id);
DEVID_FIELD(amba_id, mask);
DEVID(x86_cpu_id);
DEVID_FIELD(x86_cpu_id, feature);
DEVID_FIELD(x86_cpu_id, family);
DEVID_FIELD(x86_cpu_id, model);
DEVID_FIELD(x86_cpu_id, vendor);
return 0;
}

672
scripts/mod/file2alias.c
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File diff suppressed because it is too large Load Diff

5
scripts/mod/modpost.c
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@@ -2126,7 +2126,7 @@ int main(int argc, char **argv)
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:msSo:awM:K:")) != -1) {
switch (opt) {
case 'i':
kernel_read = optarg;
@@ -2135,9 +2135,6 @@ 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 =