x86/kprobes: Fix crash when probing CS CALL instructionsgrafted

When using eBPF to probe CS CALL instructions within a function,
a crash can be triggered.

The eBPF tool probes offset 257 of the __hrtimer_run_queues()
function:

<__hrtimer_run_queues+249>:  nopl   0x0(%rax,%rax,1)
<__hrtimer_run_queues+254>:  mov    %r14,%rdi
<__hrtimer_run_queues+257>:  cs call <__x86_indirect_thunk_r12>
<__hrtimer_run_queues+263>:  mov    %eax,%r12d
<__hrtimer_run_queues+266>:  xchg   %ax,%ax
<__hrtimer_run_queues+268>:  mov    %r13,%rdi

Which triggers this crash:

  BUG: unable to handle page fault for address: 00000000000f41c9
  #PF: supervisor write access in kernel mode
  #PF: error_code(0x0002) - not-present page
  PGD 0 P4D 0
  Oops: 0002 [#1] SMP NOPTI
  CPU: 1 PID: 0 Comm: swapper/1 Kdump: loaded Tainted: P
  RIP: 0010:__hrtimer_run_queues+0x106/0x230

Note that __hrtimer_run_queues+0x106 is __hrtimer_run_queues+262, which is
at the 6th byte of the above CS CALL instruction. Since the CS CALL
instruction occupies 6 bytes, the exception occurred in the middle of that
call instruction.

The root cause is that when using eBPF tools to probe in the middle of a
function, a kprobe with INT3 is used as the underlying implementation.

During single-step emulation of the original CALL instruction,
int3_emulate_call() assumes that the probed CALL instruction is 5 bytes
long. However, the actual CS-prefixed CALL instruction occupies 6 bytes,
so it constructs an incorrect exception return address. When the CPU
returns from the kprobe handler, the next instruction to be executed is at
the address of the last byte of that CS CALL instruction. Coincidentally,
starting from that address, the CPU fetches and decodes a completely
different instruction, which ultimately triggers a kernel crash.

Fix the issue by using the actual instruction length obtained from
the instruction decoder when constructing the exception return
address, rather than relying on the hardcoded CALL_INSN_SIZE macro.

[ mingo: Refined the changelog ]

Fixes: 6256e668b7af ("x86/kprobes: Use int3 instead of debug trap for single-step")
Suggested-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Jinke Han <jinkehan@didiglobal.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://patch.msgid.link/20260908073742.GA10517@didi-ThinkCentre-M920t-N000

26 files changed, 1080 insertions, 0 deletions

diff --git a/arch/m68k/include/uapi/asm/Kbuild b/arch/m68k/include/uapi/asm/Kbuild
new file mode 100644
index 000000000..b97c552db
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/Kbuild
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+generated-y += unistd_32.h
diff --git a/arch/m68k/include/uapi/asm/a.out.h b/arch/m68k/include/uapi/asm/a.out.h
new file mode 100644
index 000000000..3eb24fd8b
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/a.out.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef __M68K_A_OUT_H__
+#define __M68K_A_OUT_H__
+
+struct exec
+{
+  unsigned long a_info;		/* Use macros N_MAGIC, etc for access */
+  unsigned a_text;		/* length of text, in bytes */
+  unsigned a_data;		/* length of data, in bytes */
+  unsigned a_bss;		/* length of uninitialized data area for file, in bytes */
+  unsigned a_syms;		/* length of symbol table data in file, in bytes */
+  unsigned a_entry;		/* start address */
+  unsigned a_trsize;		/* length of relocation info for text, in bytes */
+  unsigned a_drsize;		/* length of relocation info for data, in bytes */
+};
+
+#define N_TRSIZE(a)	((a).a_trsize)
+#define N_DRSIZE(a)	((a).a_drsize)
+#define N_SYMSIZE(a)	((a).a_syms)
+
+#endif /* __M68K_A_OUT_H__ */
diff --git a/arch/m68k/include/uapi/asm/bootinfo-amiga.h b/arch/m68k/include/uapi/asm/bootinfo-amiga.h
new file mode 100644
index 000000000..69bf4dda3
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/bootinfo-amiga.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+** asm/bootinfo-amiga.h -- Amiga-specific boot information definitions
+*/
+
+#ifndef _UAPI_ASM_M68K_BOOTINFO_AMIGA_H
+#define _UAPI_ASM_M68K_BOOTINFO_AMIGA_H
+
+
+    /*
+     *  Amiga-specific tags
+     */
+
+#define BI_AMIGA_MODEL		0x8000	/* model (__be32) */
+#define BI_AMIGA_AUTOCON	0x8001	/* AutoConfig device */
+					/* (AmigaOS struct ConfigDev) */
+#define BI_AMIGA_CHIP_SIZE	0x8002	/* size of Chip RAM (__be32) */
+#define BI_AMIGA_VBLANK		0x8003	/* VBLANK frequency (__u8) */
+#define BI_AMIGA_PSFREQ		0x8004	/* power supply frequency (__u8) */
+#define BI_AMIGA_ECLOCK		0x8005	/* EClock frequency (__be32) */
+#define BI_AMIGA_CHIPSET	0x8006	/* native chipset present (__be32) */
+#define BI_AMIGA_SERPER		0x8007	/* serial port period (__be16) */
+
+
+    /*
+     *  Amiga models (BI_AMIGA_MODEL)
+     */
+
+#define AMI_UNKNOWN		0
+#define AMI_500			1
+#define AMI_500PLUS		2
+#define AMI_600			3
+#define AMI_1000		4
+#define AMI_1200		5
+#define AMI_2000		6
+#define AMI_2500		7
+#define AMI_3000		8
+#define AMI_3000T		9
+#define AMI_3000PLUS		10
+#define AMI_4000		11
+#define AMI_4000T		12
+#define AMI_CDTV		13
+#define AMI_CD32		14
+#define AMI_DRACO		15
+
+
+    /*
+     *  Amiga chipsets (BI_AMIGA_CHIPSET)
+     */
+
+#define CS_STONEAGE		0
+#define CS_OCS			1
+#define CS_ECS			2
+#define CS_AGA			3
+
+
+    /*
+     *  Latest Amiga bootinfo version
+     */
+
+#define AMIGA_BOOTI_VERSION	MK_BI_VERSION(2, 0)
+
+
+#endif /* _UAPI_ASM_M68K_BOOTINFO_AMIGA_H */
diff --git a/arch/m68k/include/uapi/asm/bootinfo-apollo.h b/arch/m68k/include/uapi/asm/bootinfo-apollo.h
new file mode 100644
index 000000000..c226f7957
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/bootinfo-apollo.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+** asm/bootinfo-apollo.h -- Apollo-specific boot information definitions
+*/
+
+#ifndef _UAPI_ASM_M68K_BOOTINFO_APOLLO_H
+#define _UAPI_ASM_M68K_BOOTINFO_APOLLO_H
+
+
+    /*
+     *  Apollo-specific tags
+     */
+
+#define BI_APOLLO_MODEL		0x8000	/* model (__be32) */
+
+
+    /*
+     *  Apollo models (BI_APOLLO_MODEL)
+     */
+
+#define APOLLO_UNKNOWN		0
+#define APOLLO_DN3000		1
+#define APOLLO_DN3010		2
+#define APOLLO_DN3500		3
+#define APOLLO_DN4000		4
+#define APOLLO_DN4500		5
+
+
+#endif /* _UAPI_ASM_M68K_BOOTINFO_APOLLO_H */
diff --git a/arch/m68k/include/uapi/asm/bootinfo-atari.h b/arch/m68k/include/uapi/asm/bootinfo-atari.h
new file mode 100644
index 000000000..f2218a090
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/bootinfo-atari.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+** asm/bootinfo-atari.h -- Atari-specific boot information definitions
+*/
+
+#ifndef _UAPI_ASM_M68K_BOOTINFO_ATARI_H
+#define _UAPI_ASM_M68K_BOOTINFO_ATARI_H
+
+
+    /*
+     *  Atari-specific tags
+     */
+
+#define BI_ATARI_MCH_COOKIE	0x8000	/* _MCH cookie from TOS (__be32) */
+#define BI_ATARI_MCH_TYPE	0x8001	/* special machine type (__be32) */
+
+
+    /*
+     *  mch_cookie values (upper word of BI_ATARI_MCH_COOKIE)
+     */
+
+#define ATARI_MCH_ST		0
+#define ATARI_MCH_STE		1
+#define ATARI_MCH_TT		2
+#define ATARI_MCH_FALCON	3
+
+
+    /*
+     *  Atari machine types (BI_ATARI_MCH_TYPE)
+     */
+
+#define ATARI_MACH_NORMAL	0	/* no special machine type */
+#define ATARI_MACH_MEDUSA	1	/* Medusa 040 */
+#define ATARI_MACH_HADES	2	/* Hades 040 or 060 */
+#define ATARI_MACH_AB40		3	/* Afterburner040 on Falcon */
+
+
+    /*
+     *  Latest Atari bootinfo version
+     */
+
+#define ATARI_BOOTI_VERSION	MK_BI_VERSION(2, 1)
+
+
+#endif /* _UAPI_ASM_M68K_BOOTINFO_ATARI_H */
diff --git a/arch/m68k/include/uapi/asm/bootinfo-hp300.h b/arch/m68k/include/uapi/asm/bootinfo-hp300.h
new file mode 100644
index 000000000..2141c4f5f
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/bootinfo-hp300.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+** asm/bootinfo-hp300.h -- HP9000/300-specific boot information definitions
+*/
+
+#ifndef _UAPI_ASM_M68K_BOOTINFO_HP300_H
+#define _UAPI_ASM_M68K_BOOTINFO_HP300_H
+
+
+    /*
+     *  HP9000/300-specific tags
+     */
+
+#define BI_HP300_MODEL		0x8000	/* model (__be32) */
+#define BI_HP300_UART_SCODE	0x8001	/* UART select code (__be32) */
+#define BI_HP300_UART_ADDR	0x8002	/* phys. addr of UART (__be32) */
+
+
+    /*
+     *  HP9000/300 and /400 models (BI_HP300_MODEL)
+     *
+     * This information was taken from NetBSD
+     */
+
+#define HP_320		0	/* 16MHz 68020+HP MMU+16K external cache */
+#define HP_330		1	/* 16MHz 68020+68851 MMU */
+#define HP_340		2	/* 16MHz 68030 */
+#define HP_345		3	/* 50MHz 68030+32K external cache */
+#define HP_350		4	/* 25MHz 68020+HP MMU+32K external cache */
+#define HP_360		5	/* 25MHz 68030 */
+#define HP_370		6	/* 33MHz 68030+64K external cache */
+#define HP_375		7	/* 50MHz 68030+32K external cache */
+#define HP_380		8	/* 25MHz 68040 */
+#define HP_385		9	/* 33MHz 68040 */
+
+#define HP_400		10	/* 50MHz 68030+32K external cache */
+#define HP_425T		11	/* 25MHz 68040 - model 425t */
+#define HP_425S		12	/* 25MHz 68040 - model 425s */
+#define HP_425E		13	/* 25MHz 68040 - model 425e */
+#define HP_433T		14	/* 33MHz 68040 - model 433t */
+#define HP_433S		15	/* 33MHz 68040 - model 433s */
+
+
+    /*
+     *  Latest HP9000/300 bootinfo version
+     */
+
+#define HP300_BOOTI_VERSION	MK_BI_VERSION(2, 0)
+
+
+#endif /* _UAPI_ASM_M68K_BOOTINFO_HP300_H */
diff --git a/arch/m68k/include/uapi/asm/bootinfo-mac.h b/arch/m68k/include/uapi/asm/bootinfo-mac.h
new file mode 100644
index 000000000..449928cfc
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/bootinfo-mac.h
@@ -0,0 +1,120 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+** asm/bootinfo-mac.h -- Macintosh-specific boot information definitions
+*/
+
+#ifndef _UAPI_ASM_M68K_BOOTINFO_MAC_H
+#define _UAPI_ASM_M68K_BOOTINFO_MAC_H
+
+
+    /*
+     *  Macintosh-specific tags (all __be32)
+     */
+
+#define BI_MAC_MODEL		0x8000	/* Mac Gestalt ID (model type) */
+#define BI_MAC_VADDR		0x8001	/* Mac video base address */
+#define BI_MAC_VDEPTH		0x8002	/* Mac video depth */
+#define BI_MAC_VROW		0x8003	/* Mac video rowbytes */
+#define BI_MAC_VDIM		0x8004	/* Mac video dimensions */
+#define BI_MAC_VLOGICAL		0x8005	/* Mac video logical base */
+#define BI_MAC_SCCBASE		0x8006	/* Mac SCC base address */
+#define BI_MAC_BTIME		0x8007	/* Mac boot time */
+#define BI_MAC_GMTBIAS		0x8008	/* Mac GMT timezone offset */
+#define BI_MAC_MEMSIZE		0x8009	/* Mac RAM size (sanity check) */
+#define BI_MAC_CPUID		0x800a	/* Mac CPU type (sanity check) */
+#define BI_MAC_ROMBASE		0x800b	/* Mac system ROM base address */
+
+
+    /*
+     *  Macintosh hardware profile data - unused, see macintosh.h for
+     *  reasonable type values
+     */
+
+#define BI_MAC_VIA1BASE		0x8010	/* Mac VIA1 base address (always present) */
+#define BI_MAC_VIA2BASE		0x8011	/* Mac VIA2 base address (type varies) */
+#define BI_MAC_VIA2TYPE		0x8012	/* Mac VIA2 type (VIA, RBV, OSS) */
+#define BI_MAC_ADBTYPE		0x8013	/* Mac ADB interface type */
+#define BI_MAC_ASCBASE		0x8014	/* Mac Apple Sound Chip base address */
+#define BI_MAC_SCSI5380		0x8015	/* Mac NCR 5380 SCSI (base address, multi) */
+#define BI_MAC_SCSIDMA		0x8016	/* Mac SCSI DMA (base address) */
+#define BI_MAC_SCSI5396		0x8017	/* Mac NCR 53C96 SCSI (base address, multi) */
+#define BI_MAC_IDETYPE		0x8018	/* Mac IDE interface type */
+#define BI_MAC_IDEBASE		0x8019	/* Mac IDE interface base address */
+#define BI_MAC_NUBUS		0x801a	/* Mac Nubus type (none, regular, pseudo) */
+#define BI_MAC_SLOTMASK		0x801b	/* Mac Nubus slots present */
+#define BI_MAC_SCCTYPE		0x801c	/* Mac SCC serial type (normal, IOP) */
+#define BI_MAC_ETHTYPE		0x801d	/* Mac builtin ethernet type (Sonic, MACE */
+#define BI_MAC_ETHBASE		0x801e	/* Mac builtin ethernet base address */
+#define BI_MAC_PMU		0x801f	/* Mac power management / poweroff hardware */
+#define BI_MAC_IOP_SWIM		0x8020	/* Mac SWIM floppy IOP */
+#define BI_MAC_IOP_ADB		0x8021	/* Mac ADB IOP */
+
+
+    /*
+     * Macintosh Gestalt numbers (BI_MAC_MODEL)
+     */
+
+#define MAC_MODEL_II		6
+#define MAC_MODEL_IIX		7
+#define MAC_MODEL_IICX		8
+#define MAC_MODEL_SE30		9
+#define MAC_MODEL_IICI		11
+#define MAC_MODEL_IIFX		13	/* And well numbered it is too */
+#define MAC_MODEL_IISI		18
+#define MAC_MODEL_LC		19
+#define MAC_MODEL_Q900		20
+#define MAC_MODEL_PB170		21
+#define MAC_MODEL_Q700		22
+#define MAC_MODEL_CLII		23	/* aka: P200 */
+#define MAC_MODEL_PB140		25
+#define MAC_MODEL_Q950		26	/* aka: WGS95 */
+#define MAC_MODEL_LCIII		27	/* aka: P450 */
+#define MAC_MODEL_PB210		29
+#define MAC_MODEL_C650		30
+#define MAC_MODEL_PB230		32
+#define MAC_MODEL_PB180		33
+#define MAC_MODEL_PB160		34
+#define MAC_MODEL_Q800		35	/* aka: WGS80 */
+#define MAC_MODEL_Q650		36
+#define MAC_MODEL_LCII		37	/* aka: P400/405/410/430 */
+#define MAC_MODEL_PB250		38
+#define MAC_MODEL_IIVI		44
+#define MAC_MODEL_P600		45	/* aka: P600CD */
+#define MAC_MODEL_IIVX		48
+#define MAC_MODEL_CCL		49	/* aka: P250 */
+#define MAC_MODEL_PB165C	50
+#define MAC_MODEL_C610		52	/* aka: WGS60 */
+#define MAC_MODEL_Q610		53
+#define MAC_MODEL_PB145		54	/* aka: PB145B */
+#define MAC_MODEL_P520		56	/* aka: LC520 */
+#define MAC_MODEL_C660		60
+#define MAC_MODEL_P460		62	/* aka: LCIII+, P466/P467 */
+#define MAC_MODEL_PB180C	71
+#define MAC_MODEL_PB520		72	/* aka: PB520C, PB540, PB540C, PB550C */
+#define MAC_MODEL_PB270C	77
+#define MAC_MODEL_Q840		78
+#define MAC_MODEL_P550		80	/* aka: LC550, P560 */
+#define MAC_MODEL_CCLII		83	/* aka: P275 */
+#define MAC_MODEL_PB165		84
+#define MAC_MODEL_PB190		85	/* aka: PB190CS */
+#define MAC_MODEL_TV		88
+#define MAC_MODEL_P475		89	/* aka: LC475, P476 */
+#define MAC_MODEL_P475F		90	/* aka: P475 w/ FPU (no LC040) */
+#define MAC_MODEL_P575		92	/* aka: LC575, P577/P578 */
+#define MAC_MODEL_Q605		94
+#define MAC_MODEL_Q605_ACC	95	/* Q605 accelerated to 33 MHz */
+#define MAC_MODEL_Q630		98	/* aka: LC630, P630/631/635/636/637/638/640 */
+#define MAC_MODEL_P588		99	/* aka: LC580, P580 */
+#define MAC_MODEL_PB280		102
+#define MAC_MODEL_PB280C	103
+#define MAC_MODEL_PB150		115
+
+
+    /*
+     *  Latest Macintosh bootinfo version
+     */
+
+#define MAC_BOOTI_VERSION	MK_BI_VERSION(2, 0)
+
+
+#endif /* _UAPI_ASM_M68K_BOOTINFO_MAC_H */
diff --git a/arch/m68k/include/uapi/asm/bootinfo-q40.h b/arch/m68k/include/uapi/asm/bootinfo-q40.h
new file mode 100644
index 000000000..78bda04bf
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/bootinfo-q40.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+** asm/bootinfo-q40.h -- Q40-specific boot information definitions
+*/
+
+#ifndef _UAPI_ASM_M68K_BOOTINFO_Q40_H
+#define _UAPI_ASM_M68K_BOOTINFO_Q40_H
+
+
+    /*
+     *  Latest Q40 bootinfo version
+     */
+
+#define Q40_BOOTI_VERSION	MK_BI_VERSION(2, 0)
+
+
+#endif /* _UAPI_ASM_M68K_BOOTINFO_Q40_H */
diff --git a/arch/m68k/include/uapi/asm/bootinfo-virt.h b/arch/m68k/include/uapi/asm/bootinfo-virt.h
new file mode 100644
index 000000000..7dbcd7bec
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/bootinfo-virt.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * asm/bootinfo-virt.h -- Virtual-m68k-specific boot information definitions
+ */
+
+#ifndef _UAPI_ASM_M68K_BOOTINFO_VIRT_H
+#define _UAPI_ASM_M68K_BOOTINFO_VIRT_H
+
+#define BI_VIRT_QEMU_VERSION	0x8000
+#define BI_VIRT_GF_PIC_BASE	0x8001
+#define BI_VIRT_GF_RTC_BASE	0x8002
+#define BI_VIRT_GF_TTY_BASE	0x8003
+#define BI_VIRT_VIRTIO_BASE	0x8004
+#define BI_VIRT_CTRL_BASE	0x8005
+
+/* No longer used -- replaced with BI_RNG_SEED -- but don't reuse this index:
+ * #define BI_VIRT_RNG_SEED	0x8006 */
+
+#define VIRT_BOOTI_VERSION	MK_BI_VERSION(2, 0)
+
+#endif /* _UAPI_ASM_M68K_BOOTINFO_MAC_H */
diff --git a/arch/m68k/include/uapi/asm/bootinfo-vme.h b/arch/m68k/include/uapi/asm/bootinfo-vme.h
new file mode 100644
index 000000000..b8139eb39
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/bootinfo-vme.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+** asm/bootinfo-vme.h -- VME-specific boot information definitions
+*/
+
+#ifndef _UAPI_ASM_M68K_BOOTINFO_VME_H
+#define _UAPI_ASM_M68K_BOOTINFO_VME_H
+
+
+#include <linux/types.h>
+
+
+    /*
+     *  VME-specific tags
+     */
+
+#define BI_VME_TYPE		0x8000	/* VME sub-architecture (__be32) */
+#define BI_VME_BRDINFO		0x8001	/* VME board information (struct) */
+
+
+    /*
+     *  VME models (BI_VME_TYPE)
+     */
+
+#define VME_TYPE_TP34V		0x0034	/* Tadpole TP34V */
+#define VME_TYPE_MVME147	0x0147	/* Motorola MVME147 */
+#define VME_TYPE_MVME162	0x0162	/* Motorola MVME162 */
+#define VME_TYPE_MVME166	0x0166	/* Motorola MVME166 */
+#define VME_TYPE_MVME167	0x0167	/* Motorola MVME167 */
+#define VME_TYPE_MVME172	0x0172	/* Motorola MVME172 */
+#define VME_TYPE_MVME177	0x0177	/* Motorola MVME177 */
+#define VME_TYPE_BVME4000	0x4000	/* BVM Ltd. BVME4000 */
+#define VME_TYPE_BVME6000	0x6000	/* BVM Ltd. BVME6000 */
+
+
+#ifndef __ASSEMBLER__
+
+/*
+ * Board ID data structure - pointer to this retrieved from Bug by head.S
+ *
+ * BI_VME_BRDINFO is a 32 byte struct as returned by the Bug code on
+ * Motorola VME boards.  Contains board number, Bug version, board
+ * configuration options, etc.
+ *
+ * Note, bytes 12 and 13 are board no in BCD (0162,0166,0167,0177,etc)
+ */
+
+typedef struct {
+	char	bdid[4];
+	__u8	rev, mth, day, yr;
+	__be16	size, reserved;
+	__be16	brdno;
+	char	brdsuffix[2];
+	__be32	options;
+	__be16	clun, dlun, ctype, dnum;
+	__be32	option2;
+} t_bdid, *p_bdid;
+
+#endif /* __ASSEMBLER__ */
+
+
+    /*
+     *  Latest VME bootinfo versions
+     */
+
+#define MVME147_BOOTI_VERSION	MK_BI_VERSION(2, 0)
+#define MVME16x_BOOTI_VERSION	MK_BI_VERSION(2, 0)
+#define BVME6000_BOOTI_VERSION	MK_BI_VERSION(2, 0)
+
+
+#endif /* _UAPI_ASM_M68K_BOOTINFO_VME_H */
diff --git a/arch/m68k/include/uapi/asm/bootinfo.h b/arch/m68k/include/uapi/asm/bootinfo.h
new file mode 100644
index 000000000..28d2d44c0
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/bootinfo.h
@@ -0,0 +1,184 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * asm/bootinfo.h -- Definition of the Linux/m68k boot information structure
+ *
+ * Copyright 1992 by Greg Harp
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _UAPI_ASM_M68K_BOOTINFO_H
+#define _UAPI_ASM_M68K_BOOTINFO_H
+
+
+#include <linux/types.h>
+
+
+#ifndef __ASSEMBLER__
+
+    /*
+     *  Bootinfo definitions
+     *
+     *  This is an easily parsable and extendable structure containing all
+     *  information to be passed from the bootstrap to the kernel.
+     *
+     *  This way I hope to keep all future changes back/forewards compatible.
+     *  Thus, keep your fingers crossed...
+     *
+     *  This structure is copied right after the kernel by the bootstrap
+     *  routine.
+     */
+
+struct bi_record {
+	__be16 tag;			/* tag ID */
+	__be16 size;			/* size of record (in bytes) */
+	__be32 data[];			/* data */
+};
+
+
+struct mem_info {
+	__be32 addr;			/* physical address of memory chunk */
+	__be32 size;			/* length of memory chunk (in bytes) */
+};
+
+#endif /* __ASSEMBLER__ */
+
+
+    /*
+     *  Tag Definitions
+     *
+     *  Machine independent tags start counting from 0x0000
+     *  Machine dependent tags start counting from 0x8000
+     */
+
+#define BI_LAST			0x0000	/* last record (sentinel) */
+#define BI_MACHTYPE		0x0001	/* machine type (__be32) */
+#define BI_CPUTYPE		0x0002	/* cpu type (__be32) */
+#define BI_FPUTYPE		0x0003	/* fpu type (__be32) */
+#define BI_MMUTYPE		0x0004	/* mmu type (__be32) */
+#define BI_MEMCHUNK		0x0005	/* memory chunk address and size */
+					/* (struct mem_info) */
+#define BI_RAMDISK		0x0006	/* ramdisk address and size */
+					/* (struct mem_info) */
+#define BI_COMMAND_LINE		0x0007	/* kernel command line parameters */
+					/* (string) */
+/*
+ * A random seed used to initialize the RNG. Record format:
+ *
+ *   - length       [ 2 bytes, 16-bit big endian ]
+ *   - seed data    [ `length` bytes, padded to preserve 4-byte struct alignment ]
+ */
+#define BI_RNG_SEED		0x0008
+
+
+    /*
+     *  Linux/m68k Architectures (BI_MACHTYPE)
+     */
+
+#define MACH_AMIGA		1
+#define MACH_ATARI		2
+#define MACH_MAC		3
+#define MACH_APOLLO		4
+#define MACH_SUN3		5
+#define MACH_MVME147		6
+#define MACH_MVME16x		7
+#define MACH_BVME6000		8
+#define MACH_HP300		9
+#define MACH_Q40		10
+#define MACH_SUN3X		11
+#define MACH_M54XX		12
+#define MACH_M5441X		13
+#define MACH_VIRT		14
+
+
+    /*
+     *  CPU, FPU and MMU types (BI_CPUTYPE, BI_FPUTYPE, BI_MMUTYPE)
+     *
+     *  Note: we may rely on the following equalities:
+     *
+     *      CPU_68020 == MMU_68851
+     *      CPU_68030 == MMU_68030
+     *      CPU_68040 == FPU_68040 == MMU_68040
+     *      CPU_68060 == FPU_68060 == MMU_68060
+     */
+
+#define CPUB_68020		0
+#define CPUB_68030		1
+#define CPUB_68040		2
+#define CPUB_68060		3
+#define CPUB_COLDFIRE		4
+
+#define CPU_68020		(1 << CPUB_68020)
+#define CPU_68030		(1 << CPUB_68030)
+#define CPU_68040		(1 << CPUB_68040)
+#define CPU_68060		(1 << CPUB_68060)
+#define CPU_COLDFIRE		(1 << CPUB_COLDFIRE)
+
+#define FPUB_68881		0
+#define FPUB_68882		1
+#define FPUB_68040		2	/* Internal FPU */
+#define FPUB_68060		3	/* Internal FPU */
+#define FPUB_SUNFPA		4	/* Sun-3 FPA */
+#define FPUB_COLDFIRE		5	/* ColdFire FPU */
+
+#define FPU_68881		(1 << FPUB_68881)
+#define FPU_68882		(1 << FPUB_68882)
+#define FPU_68040		(1 << FPUB_68040)
+#define FPU_68060		(1 << FPUB_68060)
+#define FPU_SUNFPA		(1 << FPUB_SUNFPA)
+#define FPU_COLDFIRE		(1 << FPUB_COLDFIRE)
+
+#define MMUB_68851		0
+#define MMUB_68030		1	/* Internal MMU */
+#define MMUB_68040		2	/* Internal MMU */
+#define MMUB_68060		3	/* Internal MMU */
+#define MMUB_APOLLO		4	/* Custom Apollo */
+#define MMUB_SUN3		5	/* Custom Sun-3 */
+#define MMUB_COLDFIRE		6	/* Internal MMU */
+
+#define MMU_68851		(1 << MMUB_68851)
+#define MMU_68030		(1 << MMUB_68030)
+#define MMU_68040		(1 << MMUB_68040)
+#define MMU_68060		(1 << MMUB_68060)
+#define MMU_SUN3		(1 << MMUB_SUN3)
+#define MMU_APOLLO		(1 << MMUB_APOLLO)
+#define MMU_COLDFIRE		(1 << MMUB_COLDFIRE)
+
+
+    /*
+     * Stuff for bootinfo interface versioning
+     *
+     * At the start of kernel code, a 'struct bootversion' is located.
+     * bootstrap checks for a matching version of the interface before booting
+     * a kernel, to avoid user confusion if kernel and bootstrap don't work
+     * together :-)
+     *
+     * If incompatible changes are made to the bootinfo interface, the major
+     * number below should be stepped (and the minor reset to 0) for the
+     * appropriate machine. If a change is backward-compatible, the minor
+     * should be stepped. "Backwards-compatible" means that booting will work,
+     * but certain features may not.
+     */
+
+#define BOOTINFOV_MAGIC			0x4249561A	/* 'BIV^Z' */
+#define MK_BI_VERSION(major, minor)	(((major) << 16) + (minor))
+#define BI_VERSION_MAJOR(v)		(((v) >> 16) & 0xffff)
+#define BI_VERSION_MINOR(v)		((v) & 0xffff)
+
+#ifndef __ASSEMBLER__
+
+struct bootversion {
+	__be16 branch;
+	__be32 magic;
+	struct {
+		__be32 machtype;
+		__be32 version;
+	} machversions[];
+} __packed;
+
+#endif /* __ASSEMBLER__ */
+
+
+#endif /* _UAPI_ASM_M68K_BOOTINFO_H */
diff --git a/arch/m68k/include/uapi/asm/byteorder.h b/arch/m68k/include/uapi/asm/byteorder.h
new file mode 100644
index 000000000..1fb5732f4
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/byteorder.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _M68K_BYTEORDER_H
+#define _M68K_BYTEORDER_H
+
+#include <linux/byteorder/big_endian.h>
+
+#endif /* _M68K_BYTEORDER_H */
diff --git a/arch/m68k/include/uapi/asm/cachectl.h b/arch/m68k/include/uapi/asm/cachectl.h
new file mode 100644
index 000000000..6171e246c
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/cachectl.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _M68K_CACHECTL_H
+#define _M68K_CACHECTL_H
+
+/* Definitions for the cacheflush system call.  */
+
+#define FLUSH_SCOPE_LINE    1	/* Flush a cache line */
+#define FLUSH_SCOPE_PAGE    2	/* Flush a page */
+#define FLUSH_SCOPE_ALL     3	/* Flush the whole cache -- superuser only */
+
+#define FLUSH_CACHE_DATA    1	/* Writeback and flush data cache */
+#define FLUSH_CACHE_INSN    2	/* Flush instruction cache */
+#define FLUSH_CACHE_BOTH    3	/* Flush both caches */
+
+#endif /* _M68K_CACHECTL_H */
diff --git a/arch/m68k/include/uapi/asm/fcntl.h b/arch/m68k/include/uapi/asm/fcntl.h
new file mode 100644
index 000000000..66c0e5515
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/fcntl.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _M68K_FCNTL_H
+#define _M68K_FCNTL_H
+
+#define O_DIRECTORY	(1 << 14)	/* must be a directory */
+#define O_NOFOLLOW	(1 << 15)	/* don't follow links */
+#define O_DIRECT	(1 << 16)	/* direct disk access hint - currently ignored */
+#define O_LARGEFILE	(1 << 17)
+
+#include <asm-generic/fcntl.h>
+
+#endif /* _M68K_FCNTL_H */
diff --git a/arch/m68k/include/uapi/asm/ioctls.h b/arch/m68k/include/uapi/asm/ioctls.h
new file mode 100644
index 000000000..d92d7c778
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/ioctls.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef __ARCH_M68K_IOCTLS_H__
+#define __ARCH_M68K_IOCTLS_H__
+
+#define FIOQSIZE	0x545E
+
+#include <asm-generic/ioctls.h>
+
+#endif /* __ARCH_M68K_IOCTLS_H__ */
diff --git a/arch/m68k/include/uapi/asm/param.h b/arch/m68k/include/uapi/asm/param.h
new file mode 100644
index 000000000..726b2e7ec
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/param.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _M68K_PARAM_H
+#define _M68K_PARAM_H
+
+#ifdef __uClinux__
+#define EXEC_PAGESIZE	4096
+#else
+#define EXEC_PAGESIZE	8192
+#endif
+
+#include <asm-generic/param.h>
+
+#endif /* _M68K_PARAM_H */
diff --git a/arch/m68k/include/uapi/asm/poll.h b/arch/m68k/include/uapi/asm/poll.h
new file mode 100644
index 000000000..c3e3fcc15
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/poll.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef __m68k_POLL_H
+#define __m68k_POLL_H
+
+#define POLLWRNORM	POLLOUT
+#define POLLWRBAND	256
+
+#include <asm-generic/poll.h>
+
+#endif
diff --git a/arch/m68k/include/uapi/asm/posix_types.h b/arch/m68k/include/uapi/asm/posix_types.h
new file mode 100644
index 000000000..10a65149b
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/posix_types.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef __ARCH_M68K_POSIX_TYPES_H
+#define __ARCH_M68K_POSIX_TYPES_H
+
+/*
+ * This file is generally used by user-level software, so you need to
+ * be a little careful about namespace pollution etc.  Also, we cannot
+ * assume GCC is being used.
+ */
+
+typedef unsigned short	__kernel_mode_t;
+#define __kernel_mode_t __kernel_mode_t
+
+typedef unsigned short	__kernel_ipc_pid_t;
+#define __kernel_ipc_pid_t __kernel_ipc_pid_t
+
+typedef unsigned short	__kernel_uid_t;
+typedef unsigned short	__kernel_gid_t;
+#define __kernel_uid_t __kernel_uid_t
+
+typedef unsigned short	__kernel_old_dev_t;
+#define __kernel_old_dev_t __kernel_old_dev_t
+
+#include <asm-generic/posix_types.h>
+
+#endif
diff --git a/arch/m68k/include/uapi/asm/ptrace.h b/arch/m68k/include/uapi/asm/ptrace.h
new file mode 100644
index 000000000..d70f77139
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/ptrace.h
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_M68K_PTRACE_H
+#define _UAPI_M68K_PTRACE_H
+
+#define PT_D1	   0
+#define PT_D2	   1
+#define PT_D3	   2
+#define PT_D4	   3
+#define PT_D5	   4
+#define PT_D6	   5
+#define PT_D7	   6
+#define PT_A0	   7
+#define PT_A1	   8
+#define PT_A2	   9
+#define PT_A3	   10
+#define PT_A4	   11
+#define PT_A5	   12
+#define PT_A6	   13
+#define PT_D0	   14
+#define PT_USP	   15
+#define PT_ORIG_D0 16
+#define PT_SR	   17
+#define PT_PC	   18
+
+#ifndef __ASSEMBLER__
+
+/* this struct defines the way the registers are stored on the
+   stack during a system call. */
+
+struct pt_regs {
+  long     d1;
+  long     d2;
+  long     d3;
+  long     d4;
+  long     d5;
+  long     a0;
+  long     a1;
+  long     a2;
+  long     d0;
+  long     orig_d0;
+  long     stkadj;
+#ifdef __mcoldfire__
+  unsigned format :  4; /* frame format specifier */
+  unsigned vector : 12; /* vector offset */
+  unsigned short sr;
+  unsigned long  pc;
+#else
+  unsigned short sr;
+  unsigned long  pc;
+  unsigned format :  4; /* frame format specifier */
+  unsigned vector : 12; /* vector offset */
+#endif
+};
+
+/*
+ * This is the extended stack used by signal handlers and the context
+ * switcher: it's pushed after the normal "struct pt_regs".
+ */
+struct switch_stack {
+	unsigned long  d6;
+	unsigned long  d7;
+	unsigned long  a3;
+	unsigned long  a4;
+	unsigned long  a5;
+	unsigned long  a6;
+	unsigned long  retpc;
+};
+
+/* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
+#define PTRACE_GETREGS            12
+#define PTRACE_SETREGS            13
+#define PTRACE_GETFPREGS          14
+#define PTRACE_SETFPREGS          15
+
+#define PTRACE_GET_THREAD_AREA    25
+
+#define PTRACE_GETFDPIC	31
+
+#define PTRACE_SINGLEBLOCK	33	/* resume execution until next branch */
+
+#define PTRACE_GETFDPIC_EXEC	0
+#define PTRACE_GETFDPIC_INTERP	1
+
+#endif /* __ASSEMBLER__ */
+#endif /* _UAPI_M68K_PTRACE_H */
diff --git a/arch/m68k/include/uapi/asm/setup.h b/arch/m68k/include/uapi/asm/setup.h
new file mode 100644
index 000000000..25fe26d55
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/setup.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+** asm/setup.h -- Definition of the Linux/m68k setup information
+**
+** Copyright 1992 by Greg Harp
+**
+** This file is subject to the terms and conditions of the GNU General Public
+** License.  See the file COPYING in the main directory of this archive
+** for more details.
+*/
+
+#ifndef _UAPI_M68K_SETUP_H
+#define _UAPI_M68K_SETUP_H
+
+#define COMMAND_LINE_SIZE 256
+
+#endif /* _UAPI_M68K_SETUP_H */
diff --git a/arch/m68k/include/uapi/asm/sigcontext.h b/arch/m68k/include/uapi/asm/sigcontext.h
new file mode 100644
index 000000000..6cc8421c8
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/sigcontext.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _ASM_M68k_SIGCONTEXT_H
+#define _ASM_M68k_SIGCONTEXT_H
+
+struct sigcontext {
+	unsigned long  sc_mask;		/* old sigmask */
+	unsigned long  sc_usp;		/* old user stack pointer */
+	unsigned long  sc_d0;
+	unsigned long  sc_d1;
+	unsigned long  sc_a0;
+	unsigned long  sc_a1;
+#ifdef __uClinux__
+	unsigned long  sc_a5;
+#endif
+	unsigned short sc_sr;
+	unsigned long  sc_pc;
+	unsigned short sc_formatvec;
+#ifndef __uClinux__
+	unsigned long  sc_fpregs[2*3];  /* room for two fp registers */
+	unsigned long  sc_fpcntl[3];
+	unsigned char  sc_fpstate[216];
+#endif
+};
+
+#endif
diff --git a/arch/m68k/include/uapi/asm/signal.h b/arch/m68k/include/uapi/asm/signal.h
new file mode 100644
index 000000000..80f520b9b
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/signal.h
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_M68K_SIGNAL_H
+#define _UAPI_M68K_SIGNAL_H
+
+#include <linux/types.h>
+
+/* Avoid too many header ordering problems.  */
+struct siginfo;
+
+#ifndef __KERNEL__
+/* Here we must cater to libcs that poke about in kernel headers.  */
+
+#define NSIG		32
+typedef unsigned long sigset_t;
+
+#endif /* __KERNEL__ */
+
+#define SIGHUP		 1
+#define SIGINT		 2
+#define SIGQUIT		 3
+#define SIGILL		 4
+#define SIGTRAP		 5
+#define SIGABRT		 6
+#define SIGIOT		 6
+#define SIGBUS		 7
+#define SIGFPE		 8
+#define SIGKILL		 9
+#define SIGUSR1		10
+#define SIGSEGV		11
+#define SIGUSR2		12
+#define SIGPIPE		13
+#define SIGALRM		14
+#define SIGTERM		15
+#define SIGSTKFLT	16
+#define SIGCHLD		17
+#define SIGCONT		18
+#define SIGSTOP		19
+#define SIGTSTP		20
+#define SIGTTIN		21
+#define SIGTTOU		22
+#define SIGURG		23
+#define SIGXCPU		24
+#define SIGXFSZ		25
+#define SIGVTALRM	26
+#define SIGPROF		27
+#define SIGWINCH	28
+#define SIGIO		29
+#define SIGPOLL		SIGIO
+/*
+#define SIGLOST		29
+*/
+#define SIGPWR		30
+#define SIGSYS		31
+#define	SIGUNUSED	31
+
+/* These should not be considered constants from userland.  */
+#define SIGRTMIN	32
+#define SIGRTMAX	_NSIG
+
+#define MINSIGSTKSZ	2048
+#define SIGSTKSZ	8192
+
+#include <asm-generic/signal-defs.h>
+
+#ifndef __KERNEL__
+/* Here we must cater to libcs that poke about in kernel headers.  */
+
+struct sigaction {
+	union {
+	  __sighandler_t _sa_handler;
+	  void (*_sa_sigaction)(int, struct siginfo *, void *);
+	} _u;
+	sigset_t sa_mask;
+	unsigned long sa_flags;
+	void (*sa_restorer)(void);
+};
+
+#define sa_handler	_u._sa_handler
+#define sa_sigaction	_u._sa_sigaction
+
+#endif /* __KERNEL__ */
+
+typedef struct sigaltstack {
+	void __user *ss_sp;
+	int ss_flags;
+	__kernel_size_t ss_size;
+} stack_t;
+
+#endif /* _UAPI_M68K_SIGNAL_H */
diff --git a/arch/m68k/include/uapi/asm/stat.h b/arch/m68k/include/uapi/asm/stat.h
new file mode 100644
index 000000000..1e15e6517
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/stat.h
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _M68K_STAT_H
+#define _M68K_STAT_H
+
+struct __old_kernel_stat {
+	unsigned short st_dev;
+	unsigned short st_ino;
+	unsigned short st_mode;
+	unsigned short st_nlink;
+	unsigned short st_uid;
+	unsigned short st_gid;
+	unsigned short st_rdev;
+	unsigned long  st_size;
+	unsigned long  st_atime;
+	unsigned long  st_mtime;
+	unsigned long  st_ctime;
+};
+
+struct stat {
+	unsigned short st_dev;
+	unsigned short __pad1;
+	unsigned long  st_ino;
+	unsigned short st_mode;
+	unsigned short st_nlink;
+	unsigned short st_uid;
+	unsigned short st_gid;
+	unsigned short st_rdev;
+	unsigned short __pad2;
+	unsigned long  st_size;
+	unsigned long  st_blksize;
+	unsigned long  st_blocks;
+	unsigned long  st_atime;
+	unsigned long  __unused1;
+	unsigned long  st_mtime;
+	unsigned long  __unused2;
+	unsigned long  st_ctime;
+	unsigned long  __unused3;
+	unsigned long  __unused4;
+	unsigned long  __unused5;
+};
+
+/* This matches struct stat64 in glibc2.1, hence the absolutely
+ * insane amounts of padding around dev_t's.
+ */
+struct stat64 {
+	unsigned long long	st_dev;
+	unsigned char	__pad1[2];
+
+#define STAT64_HAS_BROKEN_ST_INO	1
+	unsigned long	__st_ino;
+
+	unsigned int	st_mode;
+	unsigned int	st_nlink;
+
+	unsigned long	st_uid;
+	unsigned long	st_gid;
+
+	unsigned long long	st_rdev;
+	unsigned char	__pad3[2];
+
+	long long	st_size;
+	unsigned long	st_blksize;
+
+	unsigned long long	st_blocks;	/* Number 512-byte blocks allocated. */
+
+	unsigned long	st_atime;
+	unsigned long	st_atime_nsec;
+
+	unsigned long	st_mtime;
+	unsigned long	st_mtime_nsec;
+
+	unsigned long	st_ctime;
+	unsigned long	st_ctime_nsec;
+
+	unsigned long long	st_ino;
+};
+
+#endif /* _M68K_STAT_H */
diff --git a/arch/m68k/include/uapi/asm/swab.h b/arch/m68k/include/uapi/asm/swab.h
new file mode 100644
index 000000000..9ef4fafba
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/swab.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _M68K_SWAB_H
+#define _M68K_SWAB_H
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+
+#define __SWAB_64_THRU_32__
+
+#if defined (__mcfisaaplus__) || defined (__mcfisac__)
+static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
+{
+	__asm__("byterev %0" : "=d" (val) : "0" (val));
+	return val;
+}
+
+#define __arch_swab32 __arch_swab32
+#elif !defined(__mcoldfire__)
+
+static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
+{
+	__asm__("rolw #8,%0; swap %0; rolw #8,%0" : "=d" (val) : "0" (val));
+	return val;
+}
+#define __arch_swab32 __arch_swab32
+#endif
+
+#endif /* _M68K_SWAB_H */
diff --git a/arch/m68k/include/uapi/asm/ucontext.h b/arch/m68k/include/uapi/asm/ucontext.h
new file mode 100644
index 000000000..ffac69160
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/ucontext.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _M68K_UCONTEXT_H
+#define _M68K_UCONTEXT_H
+
+#include <asm/sigcontext.h>
+#include <asm/signal.h>
+
+typedef int greg_t;
+#define NGREG 18
+typedef greg_t gregset_t[NGREG];
+
+typedef struct fpregset {
+	int f_fpcntl[3];
+	int f_fpregs[8*3];
+} fpregset_t;
+
+struct mcontext {
+	int version;
+	gregset_t gregs;
+	fpregset_t fpregs;
+};
+
+#define MCONTEXT_VERSION 2
+
+struct ucontext {
+	unsigned long	  uc_flags;
+	struct ucontext  *uc_link;
+	stack_t		  uc_stack;
+	struct mcontext	  uc_mcontext;
+	unsigned long	  uc_filler[80];
+	sigset_t	  uc_sigmask;	/* mask last for extensibility */
+};
+
+#endif
diff --git a/arch/m68k/include/uapi/asm/unistd.h b/arch/m68k/include/uapi/asm/unistd.h
new file mode 100644
index 000000000..cdbd090d4
--- /dev/null
+++ b/arch/m68k/include/uapi/asm/unistd.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_ASM_M68K_UNISTD_H_
+#define _UAPI_ASM_M68K_UNISTD_H_
+
+#include <asm/unistd_32.h>
+
+#endif /* _UAPI_ASM_M68K_UNISTD_H_ */