1 # SPDX-License-Identifier: GPL-2.0 !! 1 #
2 # Unified Makefile for i386 and x86_64 !! 2 # This file is subject to the terms and conditions of the GNU General Public
3 !! 3 # License. See the file "COPYING" in the main directory of this archive
4 # select defconfig based on actual architectur !! 4 # for more details.
5 ifeq ($(ARCH),x86) !! 5 #
6 ifeq ($(shell uname -m | sed -e 's/i.86/i386 !! 6 # Copyright (C) 1994, 95, 96, 2003 by Ralf Baechle
7 KBUILD_DEFCONFIG := i386_defconfig !! 7 # DECStation modifications by Paul M. Antoine, 1996
8 else !! 8 # Copyright (C) 2002, 2003, 2004 Maciej W. Rozycki
9 KBUILD_DEFCONFIG := x86_64_defconfig !! 9 #
10 endif !! 10 # This file is included by the global makefile so that you can add your own
11 else !! 11 # architecture-specific flags and dependencies.
12 KBUILD_DEFCONFIG := $(ARCH)_defconfig !! 12 #
13 endif <<
14 <<
15 ifdef CONFIG_CC_IS_GCC <<
16 RETPOLINE_CFLAGS := $(call cc-option,-m <<
17 RETPOLINE_VDSO_CFLAGS := $(call cc-option,-m <<
18 endif <<
19 ifdef CONFIG_CC_IS_CLANG <<
20 RETPOLINE_CFLAGS := -mretpoline-externa <<
21 RETPOLINE_VDSO_CFLAGS := -mretpoline <<
22 endif <<
23 RETPOLINE_CFLAGS += $(call cc-option,-m <<
24 13
25 ifdef CONFIG_MITIGATION_RETHUNK !! 14 archscripts: scripts_basic
26 RETHUNK_CFLAGS := -mfunction-return=t !! 15 $(Q)$(MAKE) $(build)=arch/mips/tools elf-entry
27 RETHUNK_RUSTFLAGS := -Zfunction-return=t !! 16 ifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y)
28 RETPOLINE_CFLAGS += $(RETHUNK_CFLAGS) !! 17 $(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-check
29 RETPOLINE_RUSTFLAGS += $(RETHUNK_RUSTFLAGS <<
30 endif 18 endif
>> 19 $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
31 20
32 export RETHUNK_CFLAGS !! 21 KBUILD_DEFCONFIG := 32r2el_defconfig
33 export RETHUNK_RUSTFLAGS !! 22 KBUILD_DTBS := dtbs
34 export RETPOLINE_CFLAGS <<
35 export RETPOLINE_RUSTFLAGS <<
36 export RETPOLINE_VDSO_CFLAGS <<
37 23
38 # For gcc stack alignment is specified with -m !! 24 #
39 # clang has the option -mstack-alignment for t !! 25 # Select the object file format to substitute into the linker script.
40 ifneq ($(call cc-option, -mpreferred-stack-bou !! 26 #
41 cc_stack_align4 := -mpreferred-stack-bou !! 27 ifdef CONFIG_CPU_LITTLE_ENDIAN
42 cc_stack_align8 := -mpreferred-stack-bou !! 28 32bit-tool-archpref = mipsel
43 else ifneq ($(call cc-option, -mstack-alignmen !! 29 64bit-tool-archpref = mips64el
44 cc_stack_align4 := -mstack-alignment=4 !! 30 32bit-bfd = elf32-tradlittlemips
45 cc_stack_align8 := -mstack-alignment=8 !! 31 64bit-bfd = elf64-tradlittlemips
>> 32 32bit-emul = elf32ltsmip
>> 33 64bit-emul = elf64ltsmip
>> 34 else
>> 35 32bit-tool-archpref = mips
>> 36 64bit-tool-archpref = mips64
>> 37 32bit-bfd = elf32-tradbigmips
>> 38 64bit-bfd = elf64-tradbigmips
>> 39 32bit-emul = elf32btsmip
>> 40 64bit-emul = elf64btsmip
>> 41 endif
>> 42
>> 43 ifdef CONFIG_32BIT
>> 44 tool-archpref = $(32bit-tool-archpref)
>> 45 UTS_MACHINE := mips
>> 46 endif
>> 47 ifdef CONFIG_64BIT
>> 48 tool-archpref = $(64bit-tool-archpref)
>> 49 UTS_MACHINE := mips64
>> 50 endif
>> 51
>> 52 ifdef cross_compiling
>> 53 ifeq ($(CROSS_COMPILE),)
>> 54 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
>> 55 endif
46 endif 56 endif
47 57
48 # How to compile the 16-bit code. Note we alw !! 58 ifdef CONFIG_FUNCTION_GRAPH_TRACER
49 # that way we can complain to the user if the !! 59 ifndef KBUILD_MCOUNT_RA_ADDRESS
50 REALMODE_CFLAGS := -std=gnu11 -m16 -g -Os -DDI !! 60 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
51 -Wall -Wstrict-prototypes - !! 61 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
52 -fno-strict-aliasing -fomit !! 62 endif
53 -mno-mmx -mno-sse $(call cc !! 63 endif
54 <<
55 REALMODE_CFLAGS += -ffreestanding <<
56 REALMODE_CFLAGS += -fno-stack-protector <<
57 REALMODE_CFLAGS += -Wno-address-of-packed-memb <<
58 REALMODE_CFLAGS += $(cc_stack_align4) <<
59 REALMODE_CFLAGS += $(CLANG_FLAGS) <<
60 ifdef CONFIG_CC_IS_CLANG <<
61 REALMODE_CFLAGS += -Wno-gnu <<
62 endif 64 endif
63 export REALMODE_CFLAGS !! 65 cflags-y += $(call cc-option, -mno-check-zero-division)
64 <<
65 # BITS is used as extension for files which ar <<
66 # and a 64 bit version to simplify shared Make <<
67 # e.g.: obj-y += foo_$(BITS).o <<
68 export BITS <<
69 66
70 # !! 67 ifdef CONFIG_32BIT
71 # Prevent GCC from generating any FP code by m !! 68 ld-emul = $(32bit-emul)
72 # !! 69 vmlinux-32 = vmlinux
73 # This must happen before we try the -mpreferr !! 70 vmlinux-64 = vmlinux.64
74 # !! 71
75 # https://gcc.gnu.org/bugzilla/show_bug.cgi !! 72 cflags-y += -mabi=32
76 # !! 73 endif
77 KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 - !! 74
78 KBUILD_RUSTFLAGS += --target=$(objtree)/script !! 75 ifdef CONFIG_64BIT
79 KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse !! 76 ld-emul = $(64bit-emul)
>> 77 vmlinux-32 = vmlinux.32
>> 78 vmlinux-64 = vmlinux
>> 79
>> 80 cflags-y += -mabi=64
>> 81 endif
>> 82
>> 83 all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
>> 84 all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
>> 85 all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
>> 86
>> 87 #
>> 88 # GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
>> 89 # code since it only slows down the whole thing. At some point we might make
>> 90 # use of global pointer optimizations but their use of $28 conflicts with
>> 91 # the current pointer optimization.
>> 92 #
>> 93 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
>> 94 # machines may also. Since BFD is incredibly buggy with respect to
>> 95 # crossformat linking we rely on the elf2ecoff tool for format conversion.
>> 96 #
>> 97 cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
>> 98 cflags-y += -msoft-float -Wa,-msoft-float
>> 99 LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
>> 100 KBUILD_AFLAGS_MODULE += -mlong-calls
>> 101 KBUILD_CFLAGS_MODULE += -mlong-calls
>> 102
>> 103 ifeq ($(CONFIG_RELOCATABLE),y)
>> 104 LDFLAGS_vmlinux += --emit-relocs
>> 105 endif
>> 106
>> 107 cflags-y += -ffreestanding
>> 108
>> 109 cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
>> 110 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL
>> 111
>> 112 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
>> 113 -fno-omit-frame-pointer
>> 114
>> 115 # Some distribution-specific toolchains might pass the -fstack-check
>> 116 # option during the build, which adds a simple stack-probe at the beginning
>> 117 # of every function. This stack probe is to ensure that there is enough
>> 118 # stack space, else a SEGV is generated. This is not desirable for MIPS
>> 119 # as kernel stacks are small, placed in unmapped virtual memory, and do not
>> 120 # grow when overflowed. Especially on SGI IP27 platforms, this check will
>> 121 # lead to a NULL pointer dereference in _raw_spin_lock_irq.
>> 122 #
>> 123 # In disassembly, this stack probe appears at the top of a function as:
>> 124 # sd zero,<offset>(sp)
>> 125 # Where <offset> is a negative value.
>> 126 #
>> 127 cflags-y += -fno-stack-check
>> 128
>> 129 # binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes,
>> 130 # supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll
>> 131 # instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h
>> 132 # for a description).
>> 133 #
>> 134 # We disable this in order to prevent the assembler meddling with the
>> 135 # instruction that labels refer to, ie. if we label an ll instruction:
>> 136 #
>> 137 # 1: ll v0, 0(a0)
>> 138 #
>> 139 # ...then with the assembler fix applied the label may actually point at a sync
>> 140 # instruction inserted by the assembler, and if we were using the label in an
>> 141 # exception table the table would no longer contain the address of the ll
>> 142 # instruction.
>> 143 #
>> 144 # Avoid this by explicitly disabling that assembler behaviour.
>> 145 #
>> 146 cflags-y += $(call cc-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
>> 147
>> 148 #
>> 149 # CPU-dependent compiler/assembler options for optimization.
>> 150 #
>> 151 cflags-$(CONFIG_CPU_R3000) += $(call cc-option,-march=r3000,-march=mips1)
>> 152 cflags-$(CONFIG_CPU_R4300) += $(call cc-option,-march=r4300,-march=mips3) -Wa,--trap
>> 153 cflags-$(CONFIG_CPU_R4X00) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trap
>> 154 cflags-$(CONFIG_CPU_TX49XX) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trap
>> 155 cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap
>> 156 cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap
>> 157 cflags-$(CONFIG_CPU_MIPS32_R5) += -march=mips32r5 -Wa,--trap -modd-spreg
>> 158 cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg
>> 159 cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap
>> 160 cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap
>> 161 cflags-$(CONFIG_CPU_MIPS64_R5) += -march=mips64r5 -Wa,--trap
>> 162 cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
>> 163 cflags-$(CONFIG_CPU_P5600) += $(call cc-option,-march=p5600,-march=mips32r5) \
>> 164 -Wa,--trap -modd-spreg
>> 165 cflags-$(CONFIG_CPU_R5000) += $(call cc-option,-march=r5000,-march=mips4) \
>> 166 -Wa,--trap
>> 167 cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=mips4) \
>> 168 -Wa,--trap
>> 169 cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=mips4) \
>> 170 -Wa,--trap
>> 171 cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=mips4) \
>> 172 -Wa,--trap
>> 173 cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=mips64) \
>> 174 -Wa,--trap
>> 175 cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
>> 176 cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
>> 177 cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=mips4) \
>> 178 -Wa,--trap
>> 179 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -march=octeon -Wa,--trap
>> 180 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
>> 181 cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,--trap
>> 182
>> 183 cflags-$(CONFIG_CPU_LOONGSON2E) += \
>> 184 $(call cc-option,-march=loongson2e,-march=mips3) -Wa,--trap
>> 185 cflags-$(CONFIG_CPU_LOONGSON2F) += \
>> 186 $(call cc-option,-march=loongson2f,-march=mips3) -Wa,--trap
>> 187 # Some -march= flags enable MMI instructions, and GCC complains about that
>> 188 # support being enabled alongside -msoft-float. Thus explicitly disable MMI.
>> 189 cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call cc-option,-mno-loongson-mmi)
>> 190 cflags-$(CONFIG_CPU_LOONGSON64) += \
>> 191 $(call cc-option,-march=loongson3a,-march=mips64r2) -Wa,--trap
>> 192 cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi)
>> 193
>> 194 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
>> 195 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
>> 196 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
>> 197 ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS
>> 198 cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop
>> 199 cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump
>> 200 endif
>> 201
>> 202 #
>> 203 # Some versions of binutils, not currently mainline as of 2019/02/04, support
>> 204 # an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction
>> 205 # to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a
>> 206 # description).
>> 207 #
>> 208 # We disable this in order to prevent the assembler meddling with the
>> 209 # instruction that labels refer to, ie. if we label an ll instruction:
>> 210 #
>> 211 # 1: ll v0, 0(a0)
>> 212 #
>> 213 # ...then with the assembler fix applied the label may actually point at a sync
>> 214 # instruction inserted by the assembler, and if we were using the label in an
>> 215 # exception table the table would no longer contain the address of the ll
>> 216 # instruction.
>> 217 #
>> 218 # Avoid this by explicitly disabling that assembler behaviour. If upstream
>> 219 # binutils does not merge support for the flag then we can revisit & remove
>> 220 # this later - for now it ensures vendor toolchains don't cause problems.
>> 221 #
>> 222 cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
>> 223
>> 224 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
>> 225 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
>> 226 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
>> 227 # similar directives in the kernel will spam the build logs with the following warnings:
>> 228 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
>> 229 # or
>> 230 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
>> 231 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
>> 232 # been fixed properly.
>> 233 mips-cflags := $(cflags-y)
>> 234 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
>> 235 smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
>> 236 cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
>> 237 endif
>> 238 ifeq ($(CONFIG_CPU_MICROMIPS),y)
>> 239 micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
>> 240 cflags-$(micromips-ase) += -mmicromips
>> 241 endif
>> 242 ifeq ($(CONFIG_CPU_HAS_MSA),y)
>> 243 toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
>> 244 cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
>> 245 endif
>> 246 toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
>> 247 cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
>> 248 # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
>> 249 # only warns
>> 250 xpa-cflags-y := $(mips-cflags)
>> 251 xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings
>> 252 toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
>> 253 cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA
>> 254 toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
>> 255 cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC
>> 256 toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
>> 257 cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP
>> 258 toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
>> 259 cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV
>> 260
>> 261 #
>> 262 # Firmware support
>> 263 #
>> 264 libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/
>> 265 libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
>> 266 libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
>> 267 libs-y += arch/mips/fw/lib/
80 268
81 # 269 #
82 # CFLAGS for compiling floating point code ins !! 270 # Kernel compression
83 # <<
84 CC_FLAGS_FPU := -msse -msse2 <<
85 ifdef CONFIG_CC_IS_GCC <<
86 # Stack alignment mismatch, proceed with cauti <<
87 # GCC < 7.1 cannot compile code using `double` <<
88 # (8B stack alignment). <<
89 # See https://gcc.gnu.org/bugzilla/show_bug.cg <<
90 # 271 #
91 # The "-msse" in the first argument is there s !! 272 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
92 # -mpreferred-stack-boundary=3 build error: !! 273 COMPRESSION_FNAME = vmlinuz
93 # !! 274 else
94 # -mpreferred-stack-boundary=3 is not between !! 275 COMPRESSION_FNAME = vmlinux
95 # <<
96 # can be triggered. Otherwise gcc doesn't comp <<
97 CC_FLAGS_FPU += -mhard-float <<
98 CC_FLAGS_FPU += $(call cc-option,-msse -mprefe <<
99 endif 276 endif
100 277
101 ifeq ($(CONFIG_X86_KERNEL_IBT),y) <<
102 # 278 #
103 # Kernel IBT has S_CET.NOTRACK_EN=0, as such t !! 279 # Board-dependent options and extra files
104 # NOTRACK prefixes. Current generation compile <<
105 # for jump-tables, as such, disable jump-table <<
106 # 280 #
107 # (jump-tables are implicitly disabled by RETP !! 281 include $(srctree)/arch/mips/Kbuild.platforms
108 # <<
109 # https://gcc.gnu.org/bugzilla/show_bug.cgi? <<
110 # <<
111 KBUILD_CFLAGS += $(call cc-option,-fcf-protect <<
112 KBUILD_RUSTFLAGS += -Zcf-protection=branch -Zn <<
113 else <<
114 KBUILD_CFLAGS += $(call cc-option,-fcf-protect <<
115 endif <<
116 <<
117 ifeq ($(CONFIG_X86_32),y) <<
118 BITS := 32 <<
119 UTS_MACHINE := i386 <<
120 CHECKFLAGS += -D__i386__ <<
121 <<
122 KBUILD_AFLAGS += -m32 <<
123 KBUILD_CFLAGS += -m32 <<
124 282
125 KBUILD_CFLAGS += -msoft-float -mregpar !! 283 ifdef CONFIG_PHYSICAL_START
126 !! 284 load-y = $(CONFIG_PHYSICAL_START)
127 # Never want PIC in a 32-bit kernel, p !! 285 endif
128 # with nonstandard options <<
129 KBUILD_CFLAGS += -fno-pic <<
130 <<
131 # Align the stack to the register widt <<
132 # alignment of 16 bytes. This reduces <<
133 # alignment instructions. <<
134 KBUILD_CFLAGS += $(cc_stack_align4) <<
135 286
136 # CPU-specific tuning. Anything which !! 287 entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
137 include $(srctree)/arch/x86/Makefile_3 !! 288 cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
138 KBUILD_CFLAGS += $(cflags-y) !! 289 drivers-$(CONFIG_PCI) += arch/mips/pci/
139 290
140 # temporary until string.h is fixed !! 291 #
141 KBUILD_CFLAGS += -ffreestanding !! 292 # Automatically detect the build format. By default we choose
>> 293 # the elf format according to the load address.
>> 294 # We can always force a build with a 64-bits symbol format by
>> 295 # passing 'KBUILD_SYM32=no' option to the make's command line.
>> 296 #
>> 297 ifdef CONFIG_64BIT
>> 298 ifndef KBUILD_SYM32
>> 299 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
>> 300 KBUILD_SYM32 = $(call cc-option-yn, -msym32)
>> 301 endif
>> 302 endif
142 303
143 ifeq ($(CONFIG_STACKPROTECTOR),y) !! 304 ifeq ($(KBUILD_SYM32), y)
144 ifeq ($(CONFIG_SMP),y) !! 305 cflags-$(KBUILD_SYM32) += -msym32 -DKBUILD_64BIT_SYM32
145 KBUILD_CFLAGS += -msta !! 306 else
146 else !! 307 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
147 KBUILD_CFLAGS += -msta !! 308 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
148 endif <<
149 endif 309 endif
150 else !! 310 endif
151 BITS := 64 <<
152 UTS_MACHINE := x86_64 <<
153 CHECKFLAGS += -D__x86_64__ <<
154 <<
155 KBUILD_AFLAGS += -m64 <<
156 KBUILD_CFLAGS += -m64 <<
157 <<
158 # Align jump targets to 1 byte, not th <<
159 KBUILD_CFLAGS += $(call cc-option,-fal <<
160 <<
161 # Pack loops tightly as well: <<
162 KBUILD_CFLAGS += $(call cc-option,-fal <<
163 <<
164 # Don't autogenerate traditional x87 i <<
165 KBUILD_CFLAGS += -mno-80387 <<
166 KBUILD_CFLAGS += $(call cc-option,-mno <<
167 <<
168 # By default gcc and clang use a stack <<
169 # However the standard kernel entry on <<
170 # 8-byte boundary. If the compiler isn <<
171 # alignment it will generate extra ali <<
172 # default alignment which keep the sta <<
173 # Furthermore an alignment to the regi <<
174 # and the number of alignment instruct <<
175 KBUILD_CFLAGS += $(cc_stack_align8) <<
176 <<
177 # Use -mskip-rax-setup if supported. <<
178 KBUILD_CFLAGS += $(call cc-option,-msk <<
179 <<
180 # FIXME - should be integrated in Make <<
181 cflags-$(CONFIG_MK8) += -ma <<
182 cflags-$(CONFIG_MPSC) += -ma <<
183 cflags-$(CONFIG_MCORE2) += -ma <<
184 cflags-$(CONFIG_MATOM) += -ma <<
185 cflags-$(CONFIG_GENERIC_CPU) += -mt <<
186 KBUILD_CFLAGS += $(cflags-y) <<
187 <<
188 rustflags-$(CONFIG_MK8) += -Ct <<
189 rustflags-$(CONFIG_MPSC) += -Ct <<
190 rustflags-$(CONFIG_MCORE2) += -Ct <<
191 rustflags-$(CONFIG_MATOM) += -Ct <<
192 rustflags-$(CONFIG_GENERIC_CPU) += -Zt <<
193 KBUILD_RUSTFLAGS += $(rustflags-y) <<
194 <<
195 KBUILD_CFLAGS += -mno-red-zone <<
196 KBUILD_CFLAGS += -mcmodel=kernel <<
197 KBUILD_RUSTFLAGS += -Cno-redzone=y <<
198 KBUILD_RUSTFLAGS += -Ccode-model=kerne <<
199 endif 311 endif
200 312
201 # !! 313 # When linking a 32-bit executable the LLVM linker cannot cope with a
202 # If the function graph tracer is used with mc !! 314 # 32-bit load address that has been sign-extended to 64 bits. Simply
203 # '-maccumulate-outgoing-args' is needed to pr !! 315 # remove the upper 32 bits then, as it is safe to do so with other
204 # (https://gcc.gnu.org/bugzilla/show_bug.cgi?i !! 316 # linkers.
205 # !! 317 ifdef CONFIG_64BIT
206 ifdef CONFIG_FUNCTION_GRAPH_TRACER !! 318 load-ld = $(load-y)
207 ifndef CONFIG_HAVE_FENTRY !! 319 else
208 ACCUMULATE_OUTGOING_ARGS := 1 !! 320 load-ld = $(subst 0xffffffff,0x,$(load-y))
209 endif <<
210 endif 321 endif
211 322
212 ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) !! 323 KBUILD_AFLAGS += $(cflags-y)
213 # This compiler flag is not supported !! 324 KBUILD_CFLAGS += $(cflags-y)
214 KBUILD_CFLAGS += $(call cc-option,-mac !! 325 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
>> 326 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
>> 327
>> 328 bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
>> 329 LINKER_LOAD_ADDRESS=$(load-ld) \
>> 330 VMLINUX_ENTRY_ADDRESS=$(entry-y) \
>> 331 PLATFORM="$(platform-y)" \
>> 332 ITS_INPUTS="$(its-y)"
>> 333 ifdef CONFIG_32BIT
>> 334 bootvars-y += ADDR_BITS=32
>> 335 endif
>> 336 ifdef CONFIG_64BIT
>> 337 bootvars-y += ADDR_BITS=64
215 endif 338 endif
216 339
217 # Workaround for a gcc prelease that unfortuna !! 340 # This is required to get dwarf unwinding tables into .debug_frame
218 KBUILD_CFLAGS += -Wno-sign-compare !! 341 # instead of .eh_frame so we don't discard them.
219 # <<
220 KBUILD_CFLAGS += -fno-asynchronous-unwind-tabl 342 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
221 343
222 # Avoid indirect branches in kernel to deal wi !! 344 KBUILD_LDFLAGS += -m $(ld-emul)
223 ifdef CONFIG_MITIGATION_RETPOLINE <<
224 KBUILD_CFLAGS += $(RETPOLINE_CFLAGS) <<
225 KBUILD_RUSTFLAGS += $(RETPOLINE_RUSTFLAGS) <<
226 # Additionally, avoid generating expensive i <<
227 # are subject to retpolines for small number <<
228 # LLVM turns off jump table generation by de <<
229 # retpoline builds, however, gcc does not fo <<
230 # only been fixed starting from gcc stable v <<
231 # onwards, but not for older ones. See gcc b <<
232 ifndef CONFIG_CC_IS_CLANG <<
233 KBUILD_CFLAGS += -fno-jump-tables <<
234 endif <<
235 endif <<
236 345
237 ifdef CONFIG_MITIGATION_SLS !! 346 ifdef need-compiler
238 KBUILD_CFLAGS += -mharden-sls=all !! 347 CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
>> 348 grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
>> 349 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
239 endif 350 endif
240 351
241 ifdef CONFIG_CALL_PADDING !! 352 OBJCOPYFLAGS += --remove-section=.reginfo
242 PADDING_CFLAGS := -fpatchable-function-entry=$ <<
243 KBUILD_CFLAGS += $(PADDING_CFLAGS) <<
244 export PADDING_CFLAGS <<
245 353
246 PADDING_RUSTFLAGS := -Zpatchable-function-entr !! 354 libs-y += arch/mips/lib/
247 KBUILD_RUSTFLAGS += $(PADDING_RUSTFLAGS) !! 355 libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
248 export PADDING_RUSTFLAGS <<
249 endif <<
250 356
251 KBUILD_LDFLAGS += -m elf_$(UTS_MACHINE) !! 357 drivers-y += arch/mips/crypto/
252 358
253 ifdef CONFIG_X86_NEED_RELOCS !! 359 # suspend and hibernation support
254 LDFLAGS_vmlinux := --emit-relocs --discard-non !! 360 drivers-$(CONFIG_PM) += arch/mips/power/
255 else <<
256 LDFLAGS_vmlinux := <<
257 endif <<
258 361
259 # !! 362 # boot image targets (arch/mips/boot/)
260 # The 64-bit kernel must be aligned to 2MB. P !! 363 boot-y := vmlinux.bin
261 # the linker to force 2MB page size regardless !! 364 boot-y += vmlinux.ecoff
262 # by the linker. !! 365 boot-y += vmlinux.srec
263 # !! 366 boot-y += uImage
264 ifdef CONFIG_X86_64 !! 367 boot-y += uImage.bin
265 LDFLAGS_vmlinux += -z max-page-size=0x200000 !! 368 boot-y += uImage.bz2
>> 369 boot-y += uImage.gz
>> 370 boot-y += uImage.lzma
>> 371 boot-y += uImage.lzo
>> 372 boot-y += vmlinux.itb
>> 373 boot-y += vmlinux.gz.itb
>> 374 boot-y += vmlinux.bz2.itb
>> 375 boot-y += vmlinux.lzma.itb
>> 376 boot-y += vmlinux.lzo.itb
>> 377
>> 378 # compressed boot image targets (arch/mips/boot/compressed/)
>> 379 bootz-y := vmlinuz
>> 380 bootz-y += vmlinuz.bin
>> 381 bootz-y += vmlinuz.ecoff
>> 382 bootz-y += vmlinuz.srec
>> 383 bootz-y += uzImage.bin
>> 384 bootz-y += vmlinuz.itb
>> 385
>> 386 #
>> 387 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
>> 388 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
>> 389 # convert to ECOFF using elf2ecoff.
>> 390 #
>> 391 quiet_cmd_32 = OBJCOPY $@
>> 392 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
>> 393 vmlinux.32: vmlinux
>> 394 $(call cmd,32)
>> 395
>> 396 #
>> 397 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
>> 398 # ELF files from 32-bit files by conversion.
>> 399 #
>> 400 quiet_cmd_64 = OBJCOPY $@
>> 401 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
>> 402 vmlinux.64: vmlinux
>> 403 $(call cmd,64)
>> 404
>> 405 all: $(all-y) $(KBUILD_DTBS)
>> 406
>> 407 # boot
>> 408 $(boot-y): $(vmlinux-32) FORCE
>> 409 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
>> 410 $(bootvars-y) arch/mips/boot/$@
>> 411
>> 412 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
>> 413 # boot/compressed
>> 414 $(bootz-y): $(vmlinux-32) FORCE
>> 415 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
>> 416 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@
>> 417 else
>> 418 vmlinuz: FORCE
>> 419 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
>> 420 /bin/false
266 endif 421 endif
267 422
268 423
269 archscripts: scripts_basic !! 424 CLEAN_FILES += vmlinux.32 vmlinux.64
270 $(Q)$(MAKE) $(build)=arch/x86/tools re <<
271 425
272 ### !! 426 # device-trees
273 # Syscall table generation !! 427 core-y += arch/mips/boot/dts/
274 428
275 archheaders: !! 429 archprepare:
276 $(Q)$(MAKE) $(build)=arch/x86/entry/sy !! 430 ifdef CONFIG_MIPS32_N32
277 !! 431 @$(kecho) ' Checking missing-syscalls for N32'
278 ### !! 432 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
279 # Kernel objects !! 433 endif
>> 434 ifdef CONFIG_MIPS32_O32
>> 435 @$(kecho) ' Checking missing-syscalls for O32'
>> 436 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
>> 437 endif
280 438
281 libs-y += arch/x86/lib/ !! 439 install:
>> 440 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
>> 441 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
>> 442 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
>> 443 endif
>> 444 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
>> 445 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
282 446
283 # drivers-y are linked after core-y !! 447 archheaders:
284 drivers-$(CONFIG_MATH_EMULATION) += arch/x86/m !! 448 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
285 drivers-$(CONFIG_PCI) += arch/x86/p <<
286 449
287 # suspend and hibernation support !! 450 define archhelp
288 drivers-$(CONFIG_PM) += arch/x86/power/ !! 451 echo ' install - install kernel into $(INSTALL_PATH)'
>> 452 echo ' vmlinux.ecoff - ECOFF boot image'
>> 453 echo ' vmlinux.bin - Raw binary boot image'
>> 454 echo ' vmlinux.srec - SREC boot image'
>> 455 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)'
>> 456 echo ' vmlinuz - Compressed boot(zboot) image'
>> 457 echo ' vmlinuz.ecoff - ECOFF zboot image'
>> 458 echo ' vmlinuz.bin - Raw binary zboot image'
>> 459 echo ' vmlinuz.srec - SREC zboot image'
>> 460 echo ' uImage - U-Boot image'
>> 461 echo ' uImage.bin - U-Boot image (uncompressed)'
>> 462 echo ' uImage.bz2 - U-Boot image (bz2)'
>> 463 echo ' uImage.gz - U-Boot image (gzip)'
>> 464 echo ' uImage.lzma - U-Boot image (lzma)'
>> 465 echo ' uImage.lzo - U-Boot image (lzo)'
>> 466 echo ' uzImage.bin - U-Boot image (self-extracting)'
>> 467 echo
>> 468 echo ' These will be default as appropriate for a configured platform.'
>> 469 echo
>> 470 echo ' If you are targeting a system supported by generic kernels you may'
>> 471 echo ' configure the kernel for a given architecture target like so:'
>> 472 echo
>> 473 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
>> 474 echo
>> 475 echo ' Where BOARDS is some subset of the following:'
>> 476 for board in $(sort $(BOARDS)); do echo " $${board}"; done
>> 477 echo
>> 478 echo ' Specifically the following generic default configurations are'
>> 479 echo ' supported:'
>> 480 echo
>> 481 $(foreach cfg,$(generic_defconfigs),
>> 482 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
>> 483 echo
>> 484 echo ' The following legacy default configurations have been converted to'
>> 485 echo ' generic and can still be used:'
>> 486 echo
>> 487 $(foreach cfg,$(sort $(legacy_defconfigs)),
>> 488 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);)
>> 489 echo
>> 490 echo ' Otherwise, the following default configurations are available:'
>> 491 endef
289 492
290 drivers-$(CONFIG_VIDEO) += arch/x86/video/ !! 493 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
>> 494 generic_defconfigs :=
291 495
292 #### !! 496 #
293 # boot loader support. Several targets are kep !! 497 # If the user generates a generic kernel configuration without specifying a
>> 498 # list of boards to include the config fragments for, default to including all
>> 499 # available board config fragments.
>> 500 #
>> 501 ifeq ($(BOARDS),)
>> 502 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
>> 503 endif
294 504
295 boot := arch/x86/boot !! 505 #
>> 506 # Generic kernel configurations which merge generic_defconfig with the
>> 507 # appropriate config fragments from arch/mips/configs/generic/, resulting in
>> 508 # the ability to easily configure the kernel for a given architecture,
>> 509 # endianness & set of boards without duplicating the needed configuration in
>> 510 # hundreds of defconfig files.
>> 511 #
>> 512 define gen_generic_defconfigs
>> 513 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
>> 514 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
>> 515 generic_defconfigs += $$(target)
>> 516 $$(target): $(generic_config_dir)/$(bits)$(rev).config
>> 517 $$(target): $(generic_config_dir)/$(endian).config
>> 518 )))
>> 519 endef
296 520
297 BOOT_TARGETS = bzdisk fdimage fdimage144 fdima !! 521 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
>> 522 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
298 523
299 PHONY += bzImage $(BOOT_TARGETS) !! 524 define describe_generic_defconfig
>> 525 $(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
>> 526 endef
300 527
301 # Default kernel to build !! 528 .PHONY: $(generic_defconfigs)
302 all: bzImage !! 529 $(generic_defconfigs):
>> 530 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
>> 531 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
>> 532 grep -Ev '^#'
>> 533 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
>> 534 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
>> 535 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
>> 536 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
>> 537 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
>> 538 "$(origin BOARDS)" $(BOARDS)
>> 539 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
303 540
304 # KBUILD_IMAGE specify target image being buil !! 541 #
305 KBUILD_IMAGE := $(boot)/bzImage !! 542 # Prevent generic merge_config rules attempting to merge single fragments
>> 543 #
>> 544 $(generic_config_dir)/%.config: ;
306 545
307 bzImage: vmlinux !! 546 #
308 ifeq ($(CONFIG_X86_DECODER_SELFTEST),y) !! 547 # Prevent direct use of generic_defconfig, which is intended to be used as the
309 $(Q)$(MAKE) $(build)=arch/x86/tools po !! 548 # basis of the various ISA-specific targets generated above.
310 endif !! 549 #
311 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_ !! 550 .PHONY: generic_defconfig
312 $(Q)mkdir -p $(objtree)/arch/$(UTS_MAC !! 551 generic_defconfig:
313 $(Q)ln -fsn ../../x86/boot/bzImage $(o !! 552 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
>> 553 $(Q)echo "used via an ISA-specific target from the following list:"
>> 554 $(Q)echo
>> 555 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done
>> 556 $(Q)echo
>> 557 $(Q)false
314 558
315 $(BOOT_TARGETS): vmlinux !! 559 #
316 $(Q)$(MAKE) $(build)=$(boot) $@ !! 560 # Legacy defconfig compatibility - these targets used to be real defconfigs but
>> 561 # now that the boards have been converted to use the generic kernel they are
>> 562 # wrappers around the generic rules above.
>> 563 #
>> 564 legacy_defconfigs += ocelot_defconfig
>> 565 ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot
317 566
318 PHONY += install !! 567 legacy_defconfigs += sead3_defconfig
319 install: !! 568 sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3
320 $(call cmd,install) <<
321 569
322 vdso-install-$(CONFIG_X86_64) += arc !! 570 legacy_defconfigs += sead3micro_defconfig
323 vdso-install-$(CONFIG_X86_X32_ABI) += arc !! 571 sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3
324 vdso-install-$(CONFIG_COMPAT_32) += arc <<
325 <<
326 archprepare: checkbin <<
327 checkbin: <<
328 ifdef CONFIG_MITIGATION_RETPOLINE <<
329 ifeq ($(RETPOLINE_CFLAGS),) <<
330 @echo "You are building kernel with no <<
331 @echo "Please update your compiler." > <<
332 @false <<
333 endif <<
334 endif <<
335 572
336 ifdef CONFIG_UNWINDER_ORC !! 573 legacy_defconfigs += xilfpga_defconfig
337 orc_hash_h := arch/$(SRCARCH)/include/generate !! 574 xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga
338 orc_hash_sh := $(srctree)/scripts/orc_hash.sh <<
339 targets += $(orc_hash_h) <<
340 quiet_cmd_orc_hash = GEN $@ <<
341 cmd_orc_hash = mkdir -p $(dir $@); \ <<
342 $(CONFIG_SHELL) $(orc_has <<
343 $(orc_hash_h): $(srctree)/arch/x86/include/asm <<
344 $(call if_changed,orc_hash) <<
345 archprepare: $(orc_hash_h) <<
346 endif <<
347 <<
348 archclean: <<
349 $(Q)rm -rf $(objtree)/arch/i386 <<
350 $(Q)rm -rf $(objtree)/arch/x86_64 <<
351 575
352 define archhelp !! 576 legacy_defconfigs += pistachio_defconfig
353 echo '* bzImage - Compressed k !! 577 pistachio_defconfig-y := 32r2el_defconfig BOARDS=marduk
354 echo ' install - Install kern <<
355 echo ' (distributio <<
356 echo ' $$(INSTALL_P <<
357 echo '' <<
358 echo ' fdimage - Create 1.4MB <<
359 echo ' fdimage144 - Create 1.4MB <<
360 echo ' fdimage288 - Create 2.8MB <<
361 echo ' hdimage - Create a BIO <<
362 echo ' isoimage - Create a boo <<
363 echo ' bzdisk/fdima <<
364 echo ' FDARGS="..." <<
365 echo ' FDINITRD=fil <<
366 578
367 endef !! 579 .PHONY: $(legacy_defconfigs)
>> 580 $(legacy_defconfigs):
>> 581 $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)
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