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-rw-r--r--Documentation/kbuild/kbuild.txt26
-rw-r--r--Documentation/kbuild/makefiles.txt27
-rw-r--r--Makefile29
-rw-r--r--arch/avr32/Makefile2
-rw-r--r--arch/blackfin/Makefile4
-rw-r--r--arch/frv/Makefile22
-rw-r--r--arch/ia64/Makefile6
-rw-r--r--arch/m32r/Makefile4
-rw-r--r--arch/m68k/Makefile2
-rw-r--r--arch/mips/Makefile6
-rw-r--r--arch/powerpc/Makefile2
-rw-r--r--arch/s390/Makefile3
-rw-r--r--arch/score/Makefile3
-rw-r--r--lib/Kconfig.debug13
-rw-r--r--scripts/Makefile.build37
-rw-r--r--scripts/Makefile.modpost9
-rw-r--r--scripts/mod/file2alias.c6
-rw-r--r--scripts/mod/modpost.c102
-rw-r--r--scripts/mod/modpost.h43
19 files changed, 246 insertions, 100 deletions
diff --git a/Documentation/kbuild/kbuild.txt b/Documentation/kbuild/kbuild.txt
index 0d8addbb0fae..1e5165aa9e4e 100644
--- a/Documentation/kbuild/kbuild.txt
+++ b/Documentation/kbuild/kbuild.txt
@@ -22,11 +22,33 @@ building C files and assembler files.
22 22
23KAFLAGS 23KAFLAGS
24-------------------------------------------------- 24--------------------------------------------------
25Additional options to the assembler. 25Additional options to the assembler (for built-in and modules).
26
27AFLAGS_MODULE
28--------------------------------------------------
29Addtional module specific options to use for $(AS).
30
31AFLAGS_KERNEL
32--------------------------------------------------
33Addtional options for $(AS) when used for assembler
34code for code that is compiled as built-in.
26 35
27KCFLAGS 36KCFLAGS
28-------------------------------------------------- 37--------------------------------------------------
29Additional options to the C compiler. 38Additional options to the C compiler (for built-in and modules).
39
40CFLAGS_KERNEL
41--------------------------------------------------
42Addtional options for $(CC) when used to compile
43code that is compiled as built-in.
44
45CFLAGS_MODULE
46--------------------------------------------------
47Addtional module specific options to use for $(CC).
48
49LDFLAGS_MODULE
50--------------------------------------------------
51Additional options used for $(LD) when linking modules.
30 52
31KBUILD_VERBOSE 53KBUILD_VERBOSE
32-------------------------------------------------- 54--------------------------------------------------
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 8abd041b605d..c375313cb128 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -921,16 +921,33 @@ When kbuild executes, the following steps are followed (roughly):
921 The first example utilises the trick that a config option expands 921 The first example utilises the trick that a config option expands
922 to 'y' when selected. 922 to 'y' when selected.
923 923
924 CFLAGS_KERNEL $(CC) options specific for built-in 924 KBUILD_AFLAGS_KERNEL $(AS) options specific for built-in
925 925
926 $(CFLAGS_KERNEL) contains extra C compiler flags used to compile 926 $(KBUILD_AFLAGS_KERNEL) contains extra C compiler flags used to compile
927 resident kernel code. 927 resident kernel code.
928 928
929 CFLAGS_MODULE $(CC) options specific for modules 929 KBUILD_AFLAGS_MODULE Options for $(AS) when building modules
930 930
931 $(CFLAGS_MODULE) contains extra C compiler flags used to compile code 931 $(KBUILD_AFLAGS_MODULE) is used to add arch specific options that
932 for loadable kernel modules. 932 are used for $(AS).
933 From commandline AFLAGS_MODULE shall be used (see kbuild.txt).
933 934
935 KBUILD_CFLAGS_KERNEL $(CC) options specific for built-in
936
937 $(KBUILD_CFLAGS_KERNEL) contains extra C compiler flags used to compile
938 resident kernel code.
939
940 KBUILD_CFLAGS_MODULE Options for $(CC) when building modules
941
942 $(KBUILD_CFLAGS_MODULE) is used to add arch specific options that
943 are used for $(CC).
944 From commandline CFLAGS_MODULE shall be used (see kbuild.txt).
945
946 KBUILD_LDFLAGS_MODULE Options for $(LD) when linking modules
947
948 $(KBUILD_LDFLAGS_MODULE) is used to add arch specific options
949 used when linking modules. This is often a linker script.
950 From commandline LDFLAGS_MODULE shall be used (see kbuild.txt).
934 951
935--- 6.2 Add prerequisites to archprepare: 952--- 6.2 Add prerequisites to archprepare:
936 953
diff --git a/Makefile b/Makefile
index 141da26fda4b..968ac2af763b 100644
--- a/Makefile
+++ b/Makefile
@@ -332,10 +332,9 @@ CHECK = sparse
332 332
333CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 333CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
334 -Wbitwise -Wno-return-void $(CF) 334 -Wbitwise -Wno-return-void $(CF)
335MODFLAGS = -DMODULE 335CFLAGS_MODULE =
336CFLAGS_MODULE = $(MODFLAGS) 336AFLAGS_MODULE =
337AFLAGS_MODULE = $(MODFLAGS) 337LDFLAGS_MODULE =
338LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
339CFLAGS_KERNEL = 338CFLAGS_KERNEL =
340AFLAGS_KERNEL = 339AFLAGS_KERNEL =
341CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 340CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
@@ -354,7 +353,12 @@ KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
354 -Werror-implicit-function-declaration \ 353 -Werror-implicit-function-declaration \
355 -Wno-format-security \ 354 -Wno-format-security \
356 -fno-delete-null-pointer-checks 355 -fno-delete-null-pointer-checks
356KBUILD_AFLAGS_KERNEL :=
357KBUILD_CFLAGS_KERNEL :=
357KBUILD_AFLAGS := -D__ASSEMBLY__ 358KBUILD_AFLAGS := -D__ASSEMBLY__
359KBUILD_AFLAGS_MODULE := -DMODULE
360KBUILD_CFLAGS_MODULE := -DMODULE
361KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
358 362
359# Read KERNELRELEASE from include/config/kernel.release (if it exists) 363# Read KERNELRELEASE from include/config/kernel.release (if it exists)
360KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 364KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
@@ -369,6 +373,8 @@ export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
369export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 373export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
370export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 374export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
371export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 375export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
376export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
377export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
372 378
373# When compiling out-of-tree modules, put MODVERDIR in the module 379# When compiling out-of-tree modules, put MODVERDIR in the module
374# tree rather than in the kernel tree. The kernel tree might 380# tree rather than in the kernel tree. The kernel tree might
@@ -414,7 +420,7 @@ endif
414no-dot-config-targets := clean mrproper distclean \ 420no-dot-config-targets := clean mrproper distclean \
415 cscope TAGS tags help %docs check% \ 421 cscope TAGS tags help %docs check% \
416 include/linux/version.h headers_% \ 422 include/linux/version.h headers_% \
417 kernelrelease kernelversion 423 kernelversion
418 424
419config-targets := 0 425config-targets := 0
420mixed-targets := 0 426mixed-targets := 0
@@ -557,6 +563,10 @@ KBUILD_CFLAGS += -g
557KBUILD_AFLAGS += -gdwarf-2 563KBUILD_AFLAGS += -gdwarf-2
558endif 564endif
559 565
566ifdef CONFIG_DEBUG_INFO_REDUCED
567KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
568endif
569
560ifdef CONFIG_FUNCTION_TRACER 570ifdef CONFIG_FUNCTION_TRACER
561KBUILD_CFLAGS += -pg 571KBUILD_CFLAGS += -pg
562endif 572endif
@@ -603,7 +613,7 @@ endif
603# Use --build-id when available. 613# Use --build-id when available.
604LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 614LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
605 $(call cc-ldoption, -Wl$(comma)--build-id,)) 615 $(call cc-ldoption, -Wl$(comma)--build-id,))
606LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 616KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
607LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 617LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
608 618
609ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 619ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
@@ -1393,9 +1403,9 @@ checkstack:
1393 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1403 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1394 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1404 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1395 1405
1396kernelrelease: 1406kernelrelease: include/config/kernel.release
1397 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1407 @echo $(KERNELRELEASE)
1398 $(error kernelrelease not valid - run 'make prepare' to update it)) 1408
1399kernelversion: 1409kernelversion:
1400 @echo $(KERNELVERSION) 1410 @echo $(KERNELVERSION)
1401 1411
@@ -1472,6 +1482,7 @@ cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1472 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1482 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1473 1483
1474a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1484a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1485 $(KBUILD_AFLAGS_KERNEL) \
1475 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1486 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1476 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1487 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1477 1488
diff --git a/arch/avr32/Makefile b/arch/avr32/Makefile
index ead8a75203a9..22fb66590dcd 100644
--- a/arch/avr32/Makefile
+++ b/arch/avr32/Makefile
@@ -13,7 +13,7 @@ KBUILD_DEFCONFIG := atstk1002_defconfig
13 13
14KBUILD_CFLAGS += -pipe -fno-builtin -mno-pic 14KBUILD_CFLAGS += -pipe -fno-builtin -mno-pic
15KBUILD_AFLAGS += -mrelax -mno-pic 15KBUILD_AFLAGS += -mrelax -mno-pic
16CFLAGS_MODULE += -mno-relax 16KBUILD_CFLAGS_MODULE += -mno-relax
17LDFLAGS_vmlinux += --relax 17LDFLAGS_vmlinux += --relax
18 18
19cpuflags-$(CONFIG_PLATFORM_AT32AP) += -march=ap 19cpuflags-$(CONFIG_PLATFORM_AT32AP) += -march=ap
diff --git a/arch/blackfin/Makefile b/arch/blackfin/Makefile
index 5a97a31d4bbd..9d5ffaf5492a 100644
--- a/arch/blackfin/Makefile
+++ b/arch/blackfin/Makefile
@@ -18,8 +18,8 @@ ifeq ($(CONFIG_ROMKERNEL),y)
18KBUILD_CFLAGS += -mlong-calls 18KBUILD_CFLAGS += -mlong-calls
19endif 19endif
20KBUILD_AFLAGS += $(call cc-option,-mno-fdpic) 20KBUILD_AFLAGS += $(call cc-option,-mno-fdpic)
21CFLAGS_MODULE += -mlong-calls 21KBUILD_CFLAGS_MODULE += -mlong-calls
22LDFLAGS_MODULE += -m elf32bfin 22KBUILD_LDFLAGS_MODULE += -m elf32bfin
23KALLSYMS += --symbol-prefix=_ 23KALLSYMS += --symbol-prefix=_
24 24
25KBUILD_DEFCONFIG := BF537-STAMP_defconfig 25KBUILD_DEFCONFIG := BF537-STAMP_defconfig
diff --git a/arch/frv/Makefile b/arch/frv/Makefile
index 310c47a663f8..7ff84575b186 100644
--- a/arch/frv/Makefile
+++ b/arch/frv/Makefile
@@ -23,20 +23,14 @@
23# Copyright (C) 1994 by Hamish Macdonald 23# Copyright (C) 1994 by Hamish Macdonald
24# 24#
25 25
26CCSPECS := $(shell $(CC) -v 2>&1 | grep "^Reading specs from " | head -1 | cut -c20-)
27CCDIR := $(strip $(patsubst %/specs,%,$(CCSPECS)))
28CPUCLASS := fr400
29
30# test for cross compiling
31COMPILE_ARCH = $(shell uname -m)
32
33ifdef CONFIG_MMU 26ifdef CONFIG_MMU
34UTS_SYSNAME = -DUTS_SYSNAME=\"Linux\" 27UTS_SYSNAME = -DUTS_SYSNAME=\"Linux\"
35else 28else
36UTS_SYSNAME = -DUTS_SYSNAME=\"uClinux\" 29UTS_SYSNAME = -DUTS_SYSNAME=\"uClinux\"
37endif 30endif
38 31
39ARCHMODFLAGS += -G0 -mlong-calls 32KBUILD_AFLAGS_MODULE += -G0 -mlong-calls
33KBUILD_CFLAGS_MODULE += -G0 -mlong-calls
40 34
41ifdef CONFIG_GPREL_DATA_8 35ifdef CONFIG_GPREL_DATA_8
42KBUILD_CFLAGS += -G8 36KBUILD_CFLAGS += -G8
@@ -54,7 +48,6 @@ endif
54 48
55ifdef CONFIG_GC_SECTIONS 49ifdef CONFIG_GC_SECTIONS
56KBUILD_CFLAGS += -ffunction-sections -fdata-sections 50KBUILD_CFLAGS += -ffunction-sections -fdata-sections
57LINKFLAGS += --gc-sections
58endif 51endif
59 52
60ifndef CONFIG_FRAME_POINTER 53ifndef CONFIG_FRAME_POINTER
@@ -64,16 +57,13 @@ endif
64ifdef CONFIG_CPU_FR451_COMPILE 57ifdef CONFIG_CPU_FR451_COMPILE
65KBUILD_CFLAGS += -mcpu=fr450 58KBUILD_CFLAGS += -mcpu=fr450
66KBUILD_AFLAGS += -mcpu=fr450 59KBUILD_AFLAGS += -mcpu=fr450
67ASFLAGS += -mcpu=fr450
68else 60else
69ifdef CONFIG_CPU_FR551_COMPILE 61ifdef CONFIG_CPU_FR551_COMPILE
70KBUILD_CFLAGS += -mcpu=fr550 62KBUILD_CFLAGS += -mcpu=fr550
71KBUILD_AFLAGS += -mcpu=fr550 63KBUILD_AFLAGS += -mcpu=fr550
72ASFLAGS += -mcpu=fr550
73else 64else
74KBUILD_CFLAGS += -mcpu=fr400 65KBUILD_CFLAGS += -mcpu=fr400
75KBUILD_AFLAGS += -mcpu=fr400 66KBUILD_AFLAGS += -mcpu=fr400
76ASFLAGS += -mcpu=fr400
77endif 67endif
78endif 68endif
79 69
@@ -83,14 +73,12 @@ endif
83KBUILD_CFLAGS += -mno-fdpic -mgpr-32 -msoft-float -mno-media 73KBUILD_CFLAGS += -mno-fdpic -mgpr-32 -msoft-float -mno-media
84KBUILD_CFLAGS += -ffixed-fcc3 -ffixed-cc3 -ffixed-gr15 -ffixed-icc2 74KBUILD_CFLAGS += -ffixed-fcc3 -ffixed-cc3 -ffixed-gr15 -ffixed-icc2
85KBUILD_AFLAGS += -mno-fdpic 75KBUILD_AFLAGS += -mno-fdpic
86ASFLAGS += -mno-fdpic
87 76
88# make sure the .S files get compiled with debug info 77# make sure the .S files get compiled with debug info
89# and disable optimisations that are unhelpful whilst debugging 78# and disable optimisations that are unhelpful whilst debugging
90ifdef CONFIG_DEBUG_INFO 79ifdef CONFIG_DEBUG_INFO
91#KBUILD_CFLAGS += -O1 80#KBUILD_CFLAGS += -O1
92KBUILD_AFLAGS += -Wa,--gdwarf2 81KBUILD_AFLAGS += -Wa,--gdwarf2
93ASFLAGS += -Wa,--gdwarf2
94endif 82endif
95 83
96head-y := arch/frv/kernel/head.o arch/frv/kernel/init_task.o 84head-y := arch/frv/kernel/head.o arch/frv/kernel/init_task.o
@@ -105,11 +93,5 @@ all: Image
105Image: vmlinux 93Image: vmlinux
106 $(Q)$(MAKE) $(build)=arch/frv/boot $@ 94 $(Q)$(MAKE) $(build)=arch/frv/boot $@
107 95
108bootstrap:
109 $(Q)$(MAKEBOOT) bootstrap
110
111archclean: 96archclean:
112 $(Q)$(MAKE) $(clean)=arch/frv/boot 97 $(Q)$(MAKE) $(clean)=arch/frv/boot
113
114archdep: scripts/mkdep symlinks
115 $(Q)$(MAKE) $(build)=arch/frv/boot dep
diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile
index 8ae0d2604ce1..be7bfa12b705 100644
--- a/arch/ia64/Makefile
+++ b/arch/ia64/Makefile
@@ -22,13 +22,13 @@ CHECKFLAGS += -m64 -D__ia64=1 -D__ia64__=1 -D_LP64 -D__LP64__
22 22
23OBJCOPYFLAGS := --strip-all 23OBJCOPYFLAGS := --strip-all
24LDFLAGS_vmlinux := -static 24LDFLAGS_vmlinux := -static
25LDFLAGS_MODULE += -T $(srctree)/arch/ia64/module.lds 25KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/ia64/module.lds
26AFLAGS_KERNEL := -mconstant-gp 26KBUILD_AFLAGS_KERNEL := -mconstant-gp
27EXTRA := 27EXTRA :=
28 28
29cflags-y := -pipe $(EXTRA) -ffixed-r13 -mfixed-range=f12-f15,f32-f127 \ 29cflags-y := -pipe $(EXTRA) -ffixed-r13 -mfixed-range=f12-f15,f32-f127 \
30 -falign-functions=32 -frename-registers -fno-optimize-sibling-calls 30 -falign-functions=32 -frename-registers -fno-optimize-sibling-calls
31CFLAGS_KERNEL := -mconstant-gp 31KBUILD_CFLAGS_KERNEL := -mconstant-gp
32 32
33GAS_STATUS = $(shell $(srctree)/arch/ia64/scripts/check-gas "$(CC)" "$(OBJDUMP)") 33GAS_STATUS = $(shell $(srctree)/arch/ia64/scripts/check-gas "$(CC)" "$(OBJDUMP)")
34KBUILD_CPPFLAGS += $(shell $(srctree)/arch/ia64/scripts/toolchain-flags "$(CC)" "$(OBJDUMP)" "$(READELF)") 34KBUILD_CPPFLAGS += $(shell $(srctree)/arch/ia64/scripts/toolchain-flags "$(CC)" "$(OBJDUMP)" "$(READELF)")
diff --git a/arch/m32r/Makefile b/arch/m32r/Makefile
index 469766b24e22..8ff5ba0ea26c 100644
--- a/arch/m32r/Makefile
+++ b/arch/m32r/Makefile
@@ -12,8 +12,8 @@ OBJCOPYFLAGS := -O binary -R .note -R .comment -S
12LDFLAGS_vmlinux := 12LDFLAGS_vmlinux :=
13 13
14KBUILD_CFLAGS += -pipe -fno-schedule-insns 14KBUILD_CFLAGS += -pipe -fno-schedule-insns
15CFLAGS_KERNEL += -mmodel=medium 15KBUILD_CFLAGS_KERNEL += -mmodel=medium
16CFLAGS_MODULE += -mmodel=large 16KBUILD_CFLAGS_MODULE += -mmodel=large
17 17
18ifdef CONFIG_CHIP_VDEC2 18ifdef CONFIG_CHIP_VDEC2
19cflags-$(CONFIG_ISA_M32R2) += -DNO_FPU -Wa,-bitinst 19cflags-$(CONFIG_ISA_M32R2) += -DNO_FPU -Wa,-bitinst
diff --git a/arch/m68k/Makefile b/arch/m68k/Makefile
index 570d85c3f97f..b06a7e3cbcd6 100644
--- a/arch/m68k/Makefile
+++ b/arch/m68k/Makefile
@@ -18,7 +18,7 @@ KBUILD_DEFCONFIG := multi_defconfig
18# override top level makefile 18# override top level makefile
19AS += -m68020 19AS += -m68020
20LDFLAGS := -m m68kelf 20LDFLAGS := -m m68kelf
21LDFLAGS_MODULE += -T $(srctree)/arch/m68k/kernel/module.lds 21KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/m68k/kernel/module.lds
22ifneq ($(SUBARCH),$(ARCH)) 22ifneq ($(SUBARCH),$(ARCH))
23 ifeq ($(CROSS_COMPILE),) 23 ifeq ($(CROSS_COMPILE),)
24 CROSS_COMPILE := $(call cc-cross-prefix, \ 24 CROSS_COMPILE := $(call cc-cross-prefix, \
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index f0d196090e94..f4a4b663ebb3 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -93,7 +93,8 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
93cflags-y += -G 0 -mno-abicalls -fno-pic -pipe 93cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
94cflags-y += -msoft-float 94cflags-y += -msoft-float
95LDFLAGS_vmlinux += -G 0 -static -n -nostdlib 95LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
96MODFLAGS += -mlong-calls 96KBUILD_AFLAGS_MODULE += -mlong-calls
97KBUILD_CFLAGS_MODULE += -mlong-calls
97 98
98cflags-y += -ffreestanding 99cflags-y += -ffreestanding
99 100
@@ -165,7 +166,8 @@ cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
165 166
166ifdef CONFIG_CPU_SB1 167ifdef CONFIG_CPU_SB1
167ifdef CONFIG_SB1_PASS_1_WORKAROUNDS 168ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
168MODFLAGS += -msb1-pass1-workarounds 169KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
170KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
169endif 171endif
170endif 172endif
171 173
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 77cfe7a29e25..5d42f5eae70f 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -94,7 +94,7 @@ else
94endif 94endif
95endif 95endif
96 96
97LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 97KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
98 98
99ifeq ($(CONFIG_TUNE_CELL),y) 99ifeq ($(CONFIG_TUNE_CELL),y)
100 KBUILD_CFLAGS += $(call cc-option,-mtune=cell) 100 KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 30c5f01f93b0..0c9e6c6d2a64 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -24,7 +24,8 @@ CHECKFLAGS += -D__s390__ -msize-long
24else 24else
25LD_BFD := elf64-s390 25LD_BFD := elf64-s390
26LDFLAGS := -m elf64_s390 26LDFLAGS := -m elf64_s390
27MODFLAGS += -fpic -D__PIC__ 27KBUILD_AFLAGS_MODULE += -fpic -D__PIC__
28KBUILD_CFLAGS_MODULE += -fpic -D__PIC__
28KBUILD_CFLAGS += -m64 29KBUILD_CFLAGS += -m64
29KBUILD_AFLAGS += -m64 30KBUILD_AFLAGS += -m64
30UTS_MACHINE := s390x 31UTS_MACHINE := s390x
diff --git a/arch/score/Makefile b/arch/score/Makefile
index 68e0cd06d5c9..d77dc639d8e3 100644
--- a/arch/score/Makefile
+++ b/arch/score/Makefile
@@ -20,7 +20,8 @@ cflags-y += -G0 -pipe -mel -mnhwloop -D__SCOREEL__ \
20# 20#
21KBUILD_AFLAGS += $(cflags-y) 21KBUILD_AFLAGS += $(cflags-y)
22KBUILD_CFLAGS += $(cflags-y) 22KBUILD_CFLAGS += $(cflags-y)
23MODFLAGS += -mlong-calls 23KBUILD_AFLAGS_MODULE += -mlong-calls
24KBUILD_CFLAGS_MODULE += -mlong-calls
24LDFLAGS += --oformat elf32-littlescore 25LDFLAGS += --oformat elf32-littlescore
25LDFLAGS_vmlinux += -G0 -static -nostdlib 26LDFLAGS_vmlinux += -G0 -static -nostdlib
26 27
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 154ff43aaa81..67fa774f9572 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -628,6 +628,19 @@ config DEBUG_INFO
628 628
629 If unsure, say N. 629 If unsure, say N.
630 630
631config DEBUG_INFO_REDUCED
632 bool "Reduce debugging information"
633 depends on DEBUG_INFO
634 help
635 If you say Y here gcc is instructed to generate less debugging
636 information for structure types. This means that tools that
637 need full debugging information (like kgdb or systemtap) won't
638 be happy. But if you merely need debugging information to
639 resolve line numbers there is no loss. Advantage is that
640 build directory object sizes shrink dramatically over a full
641 DEBUG_INFO build and compile times are reduced too.
642 Only works with newer gcc versions.
643
631config DEBUG_VM 644config DEBUG_VM
632 bool "Debug VM" 645 bool "Debug VM"
633 depends on DEBUG_KERNEL 646 depends on DEBUG_KERNEL
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index e4deb73e9a84..a1a5cf95a68d 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -115,7 +115,10 @@ endif
115# --------------------------------------------------------------------------- 115# ---------------------------------------------------------------------------
116 116
117# Default is built-in, unless we know otherwise 117# Default is built-in, unless we know otherwise
118modkern_cflags = $(if $(part-of-module), $(CFLAGS_MODULE), $(CFLAGS_KERNEL)) 118modkern_cflags = \
119 $(if $(part-of-module), \
120 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
121 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
119quiet_modtag := $(empty) $(empty) 122quiet_modtag := $(empty) $(empty)
120 123
121$(real-objs-m) : part-of-module := y 124$(real-objs-m) : part-of-module := y
@@ -156,14 +159,14 @@ $(obj)/%.i: $(src)/%.c FORCE
156 159
157cmd_gensymtypes = \ 160cmd_gensymtypes = \
158 $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ 161 $(CPP) -D__GENKSYMS__ $(c_flags) $< | \
159 $(GENKSYMS) -T $@ -a $(ARCH) \ 162 $(GENKSYMS) $(if $(1), -T $(2)) -a $(ARCH) \
160 $(if $(KBUILD_PRESERVE),-p) \ 163 $(if $(KBUILD_PRESERVE),-p) \
161 $(if $(1),-r $(firstword $(wildcard $(@:.symtypes=.symref) /dev/null))) 164 -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
162 165
163quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ 166quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
164cmd_cc_symtypes_c = \ 167cmd_cc_symtypes_c = \
165 set -e; \ 168 set -e; \
166 $(call cmd_gensymtypes, true) >/dev/null; \ 169 $(call cmd_gensymtypes,true,$@) >/dev/null; \
167 test -s $@ || rm -f $@ 170 test -s $@ || rm -f $@
168 171
169$(obj)/%.symtypes : $(src)/%.c FORCE 172$(obj)/%.symtypes : $(src)/%.c FORCE
@@ -192,16 +195,16 @@ else
192# the actual value of the checksum generated by genksyms 195# the actual value of the checksum generated by genksyms
193 196
194cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< 197cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
195cmd_modversions = \ 198cmd_modversions = \
196 if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ 199 if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
197 $(call cmd_gensymtypes, $(KBUILD_SYMTYPES)) \ 200 $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
198 > $(@D)/.tmp_$(@F:.o=.ver); \ 201 > $(@D)/.tmp_$(@F:.o=.ver); \
199 \ 202 \
200 $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ 203 $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
201 -T $(@D)/.tmp_$(@F:.o=.ver); \ 204 -T $(@D)/.tmp_$(@F:.o=.ver); \
202 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ 205 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
203 else \ 206 else \
204 mv -f $(@D)/.tmp_$(@F) $@; \ 207 mv -f $(@D)/.tmp_$(@F) $@; \
205 fi; 208 fi;
206endif 209endif
207 210
@@ -248,10 +251,10 @@ $(obj)/%.lst: $(src)/%.c FORCE
248# Compile assembler sources (.S) 251# Compile assembler sources (.S)
249# --------------------------------------------------------------------------- 252# ---------------------------------------------------------------------------
250 253
251modkern_aflags := $(AFLAGS_KERNEL) 254modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
252 255
253$(real-objs-m) : modkern_aflags := $(AFLAGS_MODULE) 256$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
254$(real-objs-m:.o=.s): modkern_aflags := $(AFLAGS_MODULE) 257$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
255 258
256quiet_cmd_as_s_S = CPP $(quiet_modtag) $@ 259quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
257cmd_as_s_S = $(CPP) $(a_flags) -o $@ $< 260cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 8f14c81abbc7..7d22056582c1 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -30,7 +30,7 @@
30# - See include/linux/module.h for more details 30# - See include/linux/module.h for more details
31 31
32# Step 4 is solely used to allow module versioning in external modules, 32# Step 4 is solely used to allow module versioning in external modules,
33# where the CRC of each module is retrieved from the Module.symers file. 33# where the CRC of each module is retrieved from the Module.symvers file.
34 34
35# KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined 35# KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined
36# symbols in the final module linking stage 36# symbols in the final module linking stage
@@ -107,7 +107,7 @@ $(modules:.ko=.mod.c): __modpost ;
107modname = $(notdir $(@:.mod.o=)) 107modname = $(notdir $(@:.mod.o=))
108 108
109quiet_cmd_cc_o_c = CC $@ 109quiet_cmd_cc_o_c = CC $@
110 cmd_cc_o_c = $(CC) $(c_flags) $(CFLAGS_MODULE) \ 110 cmd_cc_o_c = $(CC) $(c_flags) $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE) \
111 -c -o $@ $< 111 -c -o $@ $<
112 112
113$(modules:.ko=.mod.o): %.mod.o: %.mod.c FORCE 113$(modules:.ko=.mod.o): %.mod.o: %.mod.c FORCE
@@ -117,8 +117,9 @@ targets += $(modules:.ko=.mod.o)
117 117
118# Step 6), final link of the modules 118# Step 6), final link of the modules
119quiet_cmd_ld_ko_o = LD [M] $@ 119quiet_cmd_ld_ko_o = LD [M] $@
120 cmd_ld_ko_o = $(LD) -r $(LDFLAGS) $(LDFLAGS_MODULE) -o $@ \ 120 cmd_ld_ko_o = $(LD) -r $(LDFLAGS) \
121 $(filter-out FORCE,$^) 121 $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \
122 -o $@ $(filter-out FORCE,$^)
122 123
123$(modules): %.ko :%.o %.mod.o FORCE 124$(modules): %.ko :%.o %.mod.o FORCE
124 $(call if_changed,ld_ko_o) 125 $(call if_changed,ld_ko_o)
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 5758aab0d8bb..88f3f07205f8 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -884,16 +884,16 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
884 char *zeros = NULL; 884 char *zeros = NULL;
885 885
886 /* We're looking for a section relative symbol */ 886 /* We're looking for a section relative symbol */
887 if (!sym->st_shndx || sym->st_shndx >= info->hdr->e_shnum) 887 if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections)
888 return; 888 return;
889 889
890 /* Handle all-NULL symbols allocated into .bss */ 890 /* Handle all-NULL symbols allocated into .bss */
891 if (info->sechdrs[sym->st_shndx].sh_type & SHT_NOBITS) { 891 if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) {
892 zeros = calloc(1, sym->st_size); 892 zeros = calloc(1, sym->st_size);
893 symval = zeros; 893 symval = zeros;
894 } else { 894 } else {
895 symval = (void *)info->hdr 895 symval = (void *)info->hdr
896 + info->sechdrs[sym->st_shndx].sh_offset 896 + info->sechdrs[get_secindex(info, sym)].sh_offset
897 + sym->st_value; 897 + sym->st_value;
898 } 898 }
899 899
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index f6127b9f5aca..c827309c29cf 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -253,7 +253,7 @@ static enum export export_no(const char *s)
253 return export_unknown; 253 return export_unknown;
254} 254}
255 255
256static enum export export_from_sec(struct elf_info *elf, Elf_Section sec) 256static enum export export_from_sec(struct elf_info *elf, unsigned int sec)
257{ 257{
258 if (sec == elf->export_sec) 258 if (sec == elf->export_sec)
259 return export_plain; 259 return export_plain;
@@ -373,6 +373,8 @@ static int parse_elf(struct elf_info *info, const char *filename)
373 Elf_Ehdr *hdr; 373 Elf_Ehdr *hdr;
374 Elf_Shdr *sechdrs; 374 Elf_Shdr *sechdrs;
375 Elf_Sym *sym; 375 Elf_Sym *sym;
376 const char *secstrings;
377 unsigned int symtab_idx = ~0U, symtab_shndx_idx = ~0U;
376 378
377 hdr = grab_file(filename, &info->size); 379 hdr = grab_file(filename, &info->size);
378 if (!hdr) { 380 if (!hdr) {
@@ -417,8 +419,27 @@ static int parse_elf(struct elf_info *info, const char *filename)
417 return 0; 419 return 0;
418 } 420 }
419 421
422 if (hdr->e_shnum == 0) {
423 /*
424 * There are more than 64k sections,
425 * read count from .sh_size.
426 * note: it doesn't need shndx2secindex()
427 */
428 info->num_sections = TO_NATIVE(sechdrs[0].sh_size);
429 }
430 else {
431 info->num_sections = hdr->e_shnum;
432 }
433 if (hdr->e_shstrndx == SHN_XINDEX) {
434 info->secindex_strings =
435 shndx2secindex(TO_NATIVE(sechdrs[0].sh_link));
436 }
437 else {
438 info->secindex_strings = hdr->e_shstrndx;
439 }
440
420 /* Fix endianness in section headers */ 441 /* Fix endianness in section headers */
421 for (i = 0; i < hdr->e_shnum; i++) { 442 for (i = 0; i < info->num_sections; i++) {
422 sechdrs[i].sh_name = TO_NATIVE(sechdrs[i].sh_name); 443 sechdrs[i].sh_name = TO_NATIVE(sechdrs[i].sh_name);
423 sechdrs[i].sh_type = TO_NATIVE(sechdrs[i].sh_type); 444 sechdrs[i].sh_type = TO_NATIVE(sechdrs[i].sh_type);
424 sechdrs[i].sh_flags = TO_NATIVE(sechdrs[i].sh_flags); 445 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)
431 sechdrs[i].sh_entsize = TO_NATIVE(sechdrs[i].sh_entsize); 452 sechdrs[i].sh_entsize = TO_NATIVE(sechdrs[i].sh_entsize);
432 } 453 }
433 /* Find symbol table. */ 454 /* Find symbol table. */
434 for (i = 1; i < hdr->e_shnum; i++) { 455 secstrings = (void *)hdr + sechdrs[info->secindex_strings].sh_offset;
435 const char *secstrings 456 for (i = 1; i < info->num_sections; i++) {
436 = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
437 const char *secname; 457 const char *secname;
438 int nobits = sechdrs[i].sh_type == SHT_NOBITS; 458 int nobits = sechdrs[i].sh_type == SHT_NOBITS;
439 459
@@ -461,14 +481,26 @@ static int parse_elf(struct elf_info *info, const char *filename)
461 else if (strcmp(secname, "__ksymtab_gpl_future") == 0) 481 else if (strcmp(secname, "__ksymtab_gpl_future") == 0)
462 info->export_gpl_future_sec = i; 482 info->export_gpl_future_sec = i;
463 483
464 if (sechdrs[i].sh_type != SHT_SYMTAB) 484 if (sechdrs[i].sh_type == SHT_SYMTAB) {
465 continue; 485 unsigned int sh_link_idx;
486 symtab_idx = i;
487 info->symtab_start = (void *)hdr +
488 sechdrs[i].sh_offset;
489 info->symtab_stop = (void *)hdr +
490 sechdrs[i].sh_offset + sechdrs[i].sh_size;
491 sh_link_idx = shndx2secindex(sechdrs[i].sh_link);
492 info->strtab = (void *)hdr +
493 sechdrs[sh_link_idx].sh_offset;
494 }
466 495
467 info->symtab_start = (void *)hdr + sechdrs[i].sh_offset; 496 /* 32bit section no. table? ("more than 64k sections") */
468 info->symtab_stop = (void *)hdr + sechdrs[i].sh_offset 497 if (sechdrs[i].sh_type == SHT_SYMTAB_SHNDX) {
469 + sechdrs[i].sh_size; 498 symtab_shndx_idx = i;
470 info->strtab = (void *)hdr + 499 info->symtab_shndx_start = (void *)hdr +
471 sechdrs[sechdrs[i].sh_link].sh_offset; 500 sechdrs[i].sh_offset;
501 info->symtab_shndx_stop = (void *)hdr +
502 sechdrs[i].sh_offset + sechdrs[i].sh_size;
503 }
472 } 504 }
473 if (!info->symtab_start) 505 if (!info->symtab_start)
474 fatal("%s has no symtab?\n", filename); 506 fatal("%s has no symtab?\n", filename);
@@ -480,6 +512,21 @@ static int parse_elf(struct elf_info *info, const char *filename)
480 sym->st_value = TO_NATIVE(sym->st_value); 512 sym->st_value = TO_NATIVE(sym->st_value);
481 sym->st_size = TO_NATIVE(sym->st_size); 513 sym->st_size = TO_NATIVE(sym->st_size);
482 } 514 }
515
516 if (symtab_shndx_idx != ~0U) {
517 Elf32_Word *p;
518 if (symtab_idx !=
519 shndx2secindex(sechdrs[symtab_shndx_idx].sh_link))
520 fatal("%s: SYMTAB_SHNDX has bad sh_link: %u!=%u\n",
521 filename,
522 shndx2secindex(sechdrs[symtab_shndx_idx].sh_link),
523 symtab_idx);
524 /* Fix endianness */
525 for (p = info->symtab_shndx_start; p < info->symtab_shndx_stop;
526 p++)
527 *p = TO_NATIVE(*p);
528 }
529
483 return 1; 530 return 1;
484} 531}
485 532
@@ -519,7 +566,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
519 Elf_Sym *sym, const char *symname) 566 Elf_Sym *sym, const char *symname)
520{ 567{
521 unsigned int crc; 568 unsigned int crc;
522 enum export export = export_from_sec(info, sym->st_shndx); 569 enum export export = export_from_sec(info, get_secindex(info, sym));
523 570
524 switch (sym->st_shndx) { 571 switch (sym->st_shndx) {
525 case SHN_COMMON: 572 case SHN_COMMON:
@@ -661,19 +708,19 @@ static const char *sym_name(struct elf_info *elf, Elf_Sym *sym)
661 return "(unknown)"; 708 return "(unknown)";
662} 709}
663 710
664static const char *sec_name(struct elf_info *elf, int shndx) 711static const char *sec_name(struct elf_info *elf, int secindex)
665{ 712{
666 Elf_Shdr *sechdrs = elf->sechdrs; 713 Elf_Shdr *sechdrs = elf->sechdrs;
667 return (void *)elf->hdr + 714 return (void *)elf->hdr +
668 elf->sechdrs[elf->hdr->e_shstrndx].sh_offset + 715 elf->sechdrs[elf->secindex_strings].sh_offset +
669 sechdrs[shndx].sh_name; 716 sechdrs[secindex].sh_name;
670} 717}
671 718
672static const char *sech_name(struct elf_info *elf, Elf_Shdr *sechdr) 719static const char *sech_name(struct elf_info *elf, Elf_Shdr *sechdr)
673{ 720{
674 return (void *)elf->hdr + 721 return (void *)elf->hdr +
675 elf->sechdrs[elf->hdr->e_shstrndx].sh_offset + 722 elf->sechdrs[elf->secindex_strings].sh_offset +
676 sechdr->sh_name; 723 sechdr->sh_name;
677} 724}
678 725
679/* if sym is empty or point to a string 726/* if sym is empty or point to a string
@@ -1052,11 +1099,14 @@ static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf64_Sword addr,
1052 Elf_Sym *near = NULL; 1099 Elf_Sym *near = NULL;
1053 Elf64_Sword distance = 20; 1100 Elf64_Sword distance = 20;
1054 Elf64_Sword d; 1101 Elf64_Sword d;
1102 unsigned int relsym_secindex;
1055 1103
1056 if (relsym->st_name != 0) 1104 if (relsym->st_name != 0)
1057 return relsym; 1105 return relsym;
1106
1107 relsym_secindex = get_secindex(elf, relsym);
1058 for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) { 1108 for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
1059 if (sym->st_shndx != relsym->st_shndx) 1109 if (get_secindex(elf, sym) != relsym_secindex)
1060 continue; 1110 continue;
1061 if (ELF_ST_TYPE(sym->st_info) == STT_SECTION) 1111 if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
1062 continue; 1112 continue;
@@ -1118,9 +1168,9 @@ static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr,
1118 for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) { 1168 for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
1119 const char *symsec; 1169 const char *symsec;
1120 1170
1121 if (sym->st_shndx >= SHN_LORESERVE) 1171 if (is_shndx_special(sym->st_shndx))
1122 continue; 1172 continue;
1123 symsec = sec_name(elf, sym->st_shndx); 1173 symsec = sec_name(elf, get_secindex(elf, sym));
1124 if (strcmp(symsec, sec) != 0) 1174 if (strcmp(symsec, sec) != 0)
1125 continue; 1175 continue;
1126 if (!is_valid_name(elf, sym)) 1176 if (!is_valid_name(elf, sym))
@@ -1316,7 +1366,7 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf,
1316 const char *tosec; 1366 const char *tosec;
1317 const struct sectioncheck *mismatch; 1367 const struct sectioncheck *mismatch;
1318 1368
1319 tosec = sec_name(elf, sym->st_shndx); 1369 tosec = sec_name(elf, get_secindex(elf, sym));
1320 mismatch = section_mismatch(fromsec, tosec); 1370 mismatch = section_mismatch(fromsec, tosec);
1321 if (mismatch) { 1371 if (mismatch) {
1322 Elf_Sym *to; 1372 Elf_Sym *to;
@@ -1344,7 +1394,7 @@ static unsigned int *reloc_location(struct elf_info *elf,
1344 Elf_Shdr *sechdr, Elf_Rela *r) 1394 Elf_Shdr *sechdr, Elf_Rela *r)
1345{ 1395{
1346 Elf_Shdr *sechdrs = elf->sechdrs; 1396 Elf_Shdr *sechdrs = elf->sechdrs;
1347 int section = sechdr->sh_info; 1397 int section = shndx2secindex(sechdr->sh_info);
1348 1398
1349 return (void *)elf->hdr + sechdrs[section].sh_offset + 1399 return (void *)elf->hdr + sechdrs[section].sh_offset +
1350 r->r_offset - sechdrs[section].sh_addr; 1400 r->r_offset - sechdrs[section].sh_addr;
@@ -1452,7 +1502,7 @@ static void section_rela(const char *modname, struct elf_info *elf,
1452 r.r_addend = TO_NATIVE(rela->r_addend); 1502 r.r_addend = TO_NATIVE(rela->r_addend);
1453 sym = elf->symtab_start + r_sym; 1503 sym = elf->symtab_start + r_sym;
1454 /* Skip special sections */ 1504 /* Skip special sections */
1455 if (sym->st_shndx >= SHN_LORESERVE) 1505 if (is_shndx_special(sym->st_shndx))
1456 continue; 1506 continue;
1457 check_section_mismatch(modname, elf, &r, sym, fromsec); 1507 check_section_mismatch(modname, elf, &r, sym, fromsec);
1458 } 1508 }
@@ -1510,7 +1560,7 @@ static void section_rel(const char *modname, struct elf_info *elf,
1510 } 1560 }
1511 sym = elf->symtab_start + r_sym; 1561 sym = elf->symtab_start + r_sym;
1512 /* Skip special sections */ 1562 /* Skip special sections */
1513 if (sym->st_shndx >= SHN_LORESERVE) 1563 if (is_shndx_special(sym->st_shndx))
1514 continue; 1564 continue;
1515 check_section_mismatch(modname, elf, &r, sym, fromsec); 1565 check_section_mismatch(modname, elf, &r, sym, fromsec);
1516 } 1566 }
@@ -1535,7 +1585,7 @@ static void check_sec_ref(struct module *mod, const char *modname,
1535 Elf_Shdr *sechdrs = elf->sechdrs; 1585 Elf_Shdr *sechdrs = elf->sechdrs;
1536 1586
1537 /* Walk through all sections */ 1587 /* Walk through all sections */
1538 for (i = 0; i < elf->hdr->e_shnum; i++) { 1588 for (i = 0; i < elf->num_sections; i++) {
1539 check_section(modname, elf, &elf->sechdrs[i]); 1589 check_section(modname, elf, &elf->sechdrs[i]);
1540 /* We want to process only relocation sections and not .init */ 1590 /* We want to process only relocation sections and not .init */
1541 if (sechdrs[i].sh_type == SHT_RELA) 1591 if (sechdrs[i].sh_type == SHT_RELA)
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index be987a44f250..0388cfccac8d 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -129,8 +129,51 @@ struct elf_info {
129 const char *strtab; 129 const char *strtab;
130 char *modinfo; 130 char *modinfo;
131 unsigned int modinfo_len; 131 unsigned int modinfo_len;
132
133 /* support for 32bit section numbers */
134
135 unsigned int num_sections; /* max_secindex + 1 */
136 unsigned int secindex_strings;
137 /* if Nth symbol table entry has .st_shndx = SHN_XINDEX,
138 * take shndx from symtab_shndx_start[N] instead */
139 Elf32_Word *symtab_shndx_start;
140 Elf32_Word *symtab_shndx_stop;
132}; 141};
133 142
143static inline int is_shndx_special(unsigned int i)
144{
145 return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE;
146}
147
148/* shndx is in [0..SHN_LORESERVE) U (SHN_HIRESERVE, 0xfffffff], thus:
149 * shndx == 0 <=> sechdrs[0]
150 * ......
151 * shndx == SHN_LORESERVE-1 <=> sechdrs[SHN_LORESERVE-1]
152 * shndx == SHN_HIRESERVE+1 <=> sechdrs[SHN_LORESERVE]
153 * shndx == SHN_HIRESERVE+2 <=> sechdrs[SHN_LORESERVE+1]
154 * ......
155 * fyi: sym->st_shndx is uint16, SHN_LORESERVE = ff00, SHN_HIRESERVE = ffff,
156 * so basically we map 0000..feff -> 0000..feff
157 * ff00..ffff -> (you are a bad boy, dont do it)
158 * 10000..xxxx -> ff00..(xxxx-0x100)
159 */
160static inline unsigned int shndx2secindex(unsigned int i)
161{
162 if (i <= SHN_HIRESERVE)
163 return i;
164 return i - (SHN_HIRESERVE + 1 - SHN_LORESERVE);
165}
166
167/* Accessor for sym->st_shndx, hides ugliness of "64k sections" */
168static inline unsigned int get_secindex(const struct elf_info *info,
169 const Elf_Sym *sym)
170{
171 if (sym->st_shndx != SHN_XINDEX)
172 return sym->st_shndx;
173 return shndx2secindex(info->symtab_shndx_start[sym -
174 info->symtab_start]);
175}
176
134/* file2alias.c */ 177/* file2alias.c */
135extern unsigned int cross_build; 178extern unsigned int cross_build;
136void handle_moddevtable(struct module *mod, struct elf_info *info, 179void handle_moddevtable(struct module *mod, struct elf_info *info,
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-20 09:33:30 -0400