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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-19 18:12:44 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-19 18:12:44 -0700 |
commit | d3876ff74437c5f3a1a2f8d2a45b6fb91d51ea25 (patch) | |
tree | 3f4502769af9197f220686be126c5b6a05efaf49 /arch/m68k | |
parent | bbe85027ce8019c73ab99ad1c2603e2dcd1afa49 (diff) | |
parent | 9f5fd809d7a02e32c2e044acb9f6aed1c79a699b (diff) | |
download | linux-d3876ff74437c5f3a1a2f8d2a45b6fb91d51ea25.tar.gz linux-d3876ff74437c5f3a1a2f8d2a45b6fb91d51ea25.tar.bz2 linux-d3876ff74437c5f3a1a2f8d2a45b6fb91d51ea25.zip |
Merge tag 'm68knommu-for-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
Pull m68knommu updates from Greg Ungerer:
"A collection of fixes for 5.10:
- switch to using asm-generic uaccess code
- fix sparse warnings in signal code
- fix compilation of ColdFire MMC support
- support sysrq in ColdFire serial driver"
* tag 'm68knommu-for-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
serial: mcf: add sysrq capability
m68knommu: include SDHC support only when hardware has it
m68knommu: fix sparse warnings in signal code
m68knommu: switch to using asm-generic/uaccess.h
Diffstat (limited to 'arch/m68k')
-rw-r--r-- | arch/m68k/Kconfig | 1 | ||||
-rw-r--r-- | arch/m68k/coldfire/device.c | 6 | ||||
-rw-r--r-- | arch/m68k/include/asm/uaccess.h | 398 | ||||
-rw-r--r-- | arch/m68k/include/asm/uaccess_mm.h | 390 | ||||
-rw-r--r-- | arch/m68k/include/asm/uaccess_no.h | 160 | ||||
-rw-r--r-- | arch/m68k/kernel/signal.c | 6 |
6 files changed, 402 insertions, 559 deletions
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index 93bbb74ea876..c830705bd3ac 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -31,6 +31,7 @@ config M68K select NO_DMA if !MMU && !COLDFIRE select OLD_SIGACTION select OLD_SIGSUSPEND3 + select UACCESS_MEMCPY if !MMU select VIRT_TO_BUS config CPU_BIG_ENDIAN diff --git a/arch/m68k/coldfire/device.c b/arch/m68k/coldfire/device.c index 9ef4ec0aea00..59f7dfe50a4d 100644 --- a/arch/m68k/coldfire/device.c +++ b/arch/m68k/coldfire/device.c @@ -554,7 +554,7 @@ static struct platform_device mcf_edma = { }; #endif /* IS_ENABLED(CONFIG_MCF_EDMA) */ -#if IS_ENABLED(CONFIG_MMC) +#ifdef MCFSDHC_BASE static struct mcf_esdhc_platform_data mcf_esdhc_data = { .max_bus_width = 4, .cd_type = ESDHC_CD_NONE, @@ -579,7 +579,7 @@ static struct platform_device mcf_esdhc = { .resource = mcf_esdhc_resources, .dev.platform_data = &mcf_esdhc_data, }; -#endif /* IS_ENABLED(CONFIG_MMC) */ +#endif /* MCFSDHC_BASE */ static struct platform_device *mcf_devices[] __initdata = { &mcf_uart, @@ -613,7 +613,7 @@ static struct platform_device *mcf_devices[] __initdata = { #if IS_ENABLED(CONFIG_MCF_EDMA) &mcf_edma, #endif -#if IS_ENABLED(CONFIG_MMC) +#ifdef MCFSDHC_BASE &mcf_esdhc, #endif }; diff --git a/arch/m68k/include/asm/uaccess.h b/arch/m68k/include/asm/uaccess.h index e896466a41a4..f98208ccbbcd 100644 --- a/arch/m68k/include/asm/uaccess.h +++ b/arch/m68k/include/asm/uaccess.h @@ -1,7 +1,397 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#ifdef __uClinux__ -#include <asm/uaccess_no.h> +#ifndef __M68K_UACCESS_H +#define __M68K_UACCESS_H + +#ifdef CONFIG_MMU + +/* + * User space memory access functions + */ +#include <linux/compiler.h> +#include <linux/types.h> +#include <asm/segment.h> +#include <asm/extable.h> + +/* We let the MMU do all checking */ +static inline int access_ok(const void __user *addr, + unsigned long size) +{ + return 1; +} + +/* + * Not all varients of the 68k family support the notion of address spaces. + * The traditional 680x0 parts do, and they use the sfc/dfc registers and + * the "moves" instruction to access user space from kernel space. Other + * family members like ColdFire don't support this, and only have a single + * address space, and use the usual "move" instruction for user space access. + * + * Outside of this difference the user space access functions are the same. + * So lets keep the code simple and just define in what we need to use. + */ +#ifdef CONFIG_CPU_HAS_ADDRESS_SPACES +#define MOVES "moves" #else -#include <asm/uaccess_mm.h> +#define MOVES "move" #endif -#include <asm/extable.h> + +extern int __put_user_bad(void); +extern int __get_user_bad(void); + +#define __put_user_asm(res, x, ptr, bwl, reg, err) \ +asm volatile ("\n" \ + "1: "MOVES"."#bwl" %2,%1\n" \ + "2:\n" \ + " .section .fixup,\"ax\"\n" \ + " .even\n" \ + "10: moveq.l %3,%0\n" \ + " jra 2b\n" \ + " .previous\n" \ + "\n" \ + " .section __ex_table,\"a\"\n" \ + " .align 4\n" \ + " .long 1b,10b\n" \ + " .long 2b,10b\n" \ + " .previous" \ + : "+d" (res), "=m" (*(ptr)) \ + : #reg (x), "i" (err)) + +/* + * These are the main single-value transfer routines. They automatically + * use the right size if we just have the right pointer type. + */ + +#define __put_user(x, ptr) \ +({ \ + typeof(*(ptr)) __pu_val = (x); \ + int __pu_err = 0; \ + __chk_user_ptr(ptr); \ + switch (sizeof (*(ptr))) { \ + case 1: \ + __put_user_asm(__pu_err, __pu_val, ptr, b, d, -EFAULT); \ + break; \ + case 2: \ + __put_user_asm(__pu_err, __pu_val, ptr, w, r, -EFAULT); \ + break; \ + case 4: \ + __put_user_asm(__pu_err, __pu_val, ptr, l, r, -EFAULT); \ + break; \ + case 8: \ + { \ + const void __user *__pu_ptr = (ptr); \ + asm volatile ("\n" \ + "1: "MOVES".l %2,(%1)+\n" \ + "2: "MOVES".l %R2,(%1)\n" \ + "3:\n" \ + " .section .fixup,\"ax\"\n" \ + " .even\n" \ + "10: movel %3,%0\n" \ + " jra 3b\n" \ + " .previous\n" \ + "\n" \ + " .section __ex_table,\"a\"\n" \ + " .align 4\n" \ + " .long 1b,10b\n" \ + " .long 2b,10b\n" \ + " .long 3b,10b\n" \ + " .previous" \ + : "+d" (__pu_err), "+a" (__pu_ptr) \ + : "r" (__pu_val), "i" (-EFAULT) \ + : "memory"); \ + break; \ + } \ + default: \ + __pu_err = __put_user_bad(); \ + break; \ + } \ + __pu_err; \ +}) +#define put_user(x, ptr) __put_user(x, ptr) + + +#define __get_user_asm(res, x, ptr, type, bwl, reg, err) ({ \ + type __gu_val; \ + asm volatile ("\n" \ + "1: "MOVES"."#bwl" %2,%1\n" \ + "2:\n" \ + " .section .fixup,\"ax\"\n" \ + " .even\n" \ + "10: move.l %3,%0\n" \ + " sub.l %1,%1\n" \ + " jra 2b\n" \ + " .previous\n" \ + "\n" \ + " .section __ex_table,\"a\"\n" \ + " .align 4\n" \ + " .long 1b,10b\n" \ + " .previous" \ + : "+d" (res), "=&" #reg (__gu_val) \ + : "m" (*(ptr)), "i" (err)); \ + (x) = (__force typeof(*(ptr)))(__force unsigned long)__gu_val; \ +}) + +#define __get_user(x, ptr) \ +({ \ + int __gu_err = 0; \ + __chk_user_ptr(ptr); \ + switch (sizeof(*(ptr))) { \ + case 1: \ + __get_user_asm(__gu_err, x, ptr, u8, b, d, -EFAULT); \ + break; \ + case 2: \ + __get_user_asm(__gu_err, x, ptr, u16, w, r, -EFAULT); \ + break; \ + case 4: \ + __get_user_asm(__gu_err, x, ptr, u32, l, r, -EFAULT); \ + break; \ + case 8: { \ + const void __user *__gu_ptr = (ptr); \ + union { \ + u64 l; \ + __typeof__(*(ptr)) t; \ + } __gu_val; \ + asm volatile ("\n" \ + "1: "MOVES".l (%2)+,%1\n" \ + "2: "MOVES".l (%2),%R1\n" \ + "3:\n" \ + " .section .fixup,\"ax\"\n" \ + " .even\n" \ + "10: move.l %3,%0\n" \ + " sub.l %1,%1\n" \ + " sub.l %R1,%R1\n" \ + " jra 3b\n" \ + " .previous\n" \ + "\n" \ + " .section __ex_table,\"a\"\n" \ + " .align 4\n" \ + " .long 1b,10b\n" \ + " .long 2b,10b\n" \ + " .previous" \ + : "+d" (__gu_err), "=&r" (__gu_val.l), \ + "+a" (__gu_ptr) \ + : "i" (-EFAULT) \ + : "memory"); \ + (x) = __gu_val.t; \ + break; \ + } \ + default: \ + __gu_err = __get_user_bad(); \ + break; \ + } \ + __gu_err; \ +}) +#define get_user(x, ptr) __get_user(x, ptr) + +unsigned long __generic_copy_from_user(void *to, const void __user *from, unsigned long n); +unsigned long __generic_copy_to_user(void __user *to, const void *from, unsigned long n); + +#define __suffix0 +#define __suffix1 b +#define __suffix2 w +#define __suffix4 l + +#define ____constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3)\ + asm volatile ("\n" \ + "1: "MOVES"."#s1" (%2)+,%3\n" \ + " move."#s1" %3,(%1)+\n" \ + " .ifnc \""#s2"\",\"\"\n" \ + "2: "MOVES"."#s2" (%2)+,%3\n" \ + " move."#s2" %3,(%1)+\n" \ + " .ifnc \""#s3"\",\"\"\n" \ + "3: "MOVES"."#s3" (%2)+,%3\n" \ + " move."#s3" %3,(%1)+\n" \ + " .endif\n" \ + " .endif\n" \ + "4:\n" \ + " .section __ex_table,\"a\"\n" \ + " .align 4\n" \ + " .long 1b,10f\n" \ + " .ifnc \""#s2"\",\"\"\n" \ + " .long 2b,20f\n" \ + " .ifnc \""#s3"\",\"\"\n" \ + " .long 3b,30f\n" \ + " .endif\n" \ + " .endif\n" \ + " .previous\n" \ + "\n" \ + " .section .fixup,\"ax\"\n" \ + " .even\n" \ + "10: addq.l #"#n1",%0\n" \ + " .ifnc \""#s2"\",\"\"\n" \ + "20: addq.l #"#n2",%0\n" \ + " .ifnc \""#s3"\",\"\"\n" \ + "30: addq.l #"#n3",%0\n" \ + " .endif\n" \ + " .endif\n" \ + " jra 4b\n" \ + " .previous\n" \ + : "+d" (res), "+&a" (to), "+a" (from), "=&d" (tmp) \ + : : "memory") + +#define ___constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3)\ + ____constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3) +#define __constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3) \ + ___constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, \ + __suffix##n1, __suffix##n2, __suffix##n3) + +static __always_inline unsigned long +__constant_copy_from_user(void *to, const void __user *from, unsigned long n) +{ + unsigned long res = 0, tmp; + + switch (n) { + case 1: + __constant_copy_from_user_asm(res, to, from, tmp, 1, 0, 0); + break; + case 2: + __constant_copy_from_user_asm(res, to, from, tmp, 2, 0, 0); + break; + case 3: + __constant_copy_from_user_asm(res, to, from, tmp, 2, 1, 0); + break; + case 4: + __constant_copy_from_user_asm(res, to, from, tmp, 4, 0, 0); + break; + case 5: + __constant_copy_from_user_asm(res, to, from, tmp, 4, 1, 0); + break; + case 6: + __constant_copy_from_user_asm(res, to, from, tmp, 4, 2, 0); + break; + case 7: + __constant_copy_from_user_asm(res, to, from, tmp, 4, 2, 1); + break; + case 8: + __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 0); + break; + case 9: + __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 1); + break; + case 10: + __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 2); + break; + case 12: + __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 4); + break; + default: + /* we limit the inlined version to 3 moves */ + return __generic_copy_from_user(to, from, n); + } + + return res; +} + +#define __constant_copy_to_user_asm(res, to, from, tmp, n, s1, s2, s3) \ + asm volatile ("\n" \ + " move."#s1" (%2)+,%3\n" \ + "11: "MOVES"."#s1" %3,(%1)+\n" \ + "12: move."#s2" (%2)+,%3\n" \ + "21: "MOVES"."#s2" %3,(%1)+\n" \ + "22:\n" \ + " .ifnc \""#s3"\",\"\"\n" \ + " move."#s3" (%2)+,%3\n" \ + "31: "MOVES"."#s3" %3,(%1)+\n" \ + "32:\n" \ + " .endif\n" \ + "4:\n" \ + "\n" \ + " .section __ex_table,\"a\"\n" \ + " .align 4\n" \ + " .long 11b,5f\n" \ + " .long 12b,5f\n" \ + " .long 21b,5f\n" \ + " .long 22b,5f\n" \ + " .ifnc \""#s3"\",\"\"\n" \ + " .long 31b,5f\n" \ + " .long 32b,5f\n" \ + " .endif\n" \ + " .previous\n" \ + "\n" \ + " .section .fixup,\"ax\"\n" \ + " .even\n" \ + "5: moveq.l #"#n",%0\n" \ + " jra 4b\n" \ + " .previous\n" \ + : "+d" (res), "+a" (to), "+a" (from), "=&d" (tmp) \ + : : "memory") + +static __always_inline unsigned long +__constant_copy_to_user(void __user *to, const void *from, unsigned long n) +{ + unsigned long res = 0, tmp; + + switch (n) { + case 1: + __put_user_asm(res, *(u8 *)from, (u8 __user *)to, b, d, 1); + break; + case 2: + __put_user_asm(res, *(u16 *)from, (u16 __user *)to, w, r, 2); + break; + case 3: + __constant_copy_to_user_asm(res, to, from, tmp, 3, w, b,); + break; + case 4: + __put_user_asm(res, *(u32 *)from, (u32 __user *)to, l, r, 4); + break; + case 5: + __constant_copy_to_user_asm(res, to, from, tmp, 5, l, b,); + break; + case 6: + __constant_copy_to_user_asm(res, to, from, tmp, 6, l, w,); + break; + case 7: + __constant_copy_to_user_asm(res, to, from, tmp, 7, l, w, b); + break; + case 8: + __constant_copy_to_user_asm(res, to, from, tmp, 8, l, l,); + break; + case 9: + __constant_copy_to_user_asm(res, to, from, tmp, 9, l, l, b); + break; + case 10: + __constant_copy_to_user_asm(res, to, from, tmp, 10, l, l, w); + break; + case 12: + __constant_copy_to_user_asm(res, to, from, tmp, 12, l, l, l); + break; + default: + /* limit the inlined version to 3 moves */ + return __generic_copy_to_user(to, from, n); + } + + return res; +} + +static inline unsigned long +raw_copy_from_user(void *to, const void __user *from, unsigned long n) +{ + if (__builtin_constant_p(n)) + return __constant_copy_from_user(to, from, n); + return __generic_copy_from_user(to, from, n); +} + +static inline unsigned long +raw_copy_to_user(void __user *to, const void *from, unsigned long n) +{ + if (__builtin_constant_p(n)) + return __constant_copy_to_user(to, from, n); + return __generic_copy_to_user(to, from, n); +} +#define INLINE_COPY_FROM_USER +#define INLINE_COPY_TO_USER + +#define user_addr_max() \ + (uaccess_kernel() ? ~0UL : TASK_SIZE) + +extern long strncpy_from_user(char *dst, const char __user *src, long count); +extern __must_check long strnlen_user(const char __user *str, long n); + +unsigned long __clear_user(void __user *to, unsigned long n); + +#define clear_user __clear_user + +#else /* !CONFIG_MMU */ +#include <asm-generic/uaccess.h> +#endif + +#endif /* _M68K_UACCESS_H */ diff --git a/arch/m68k/include/asm/uaccess_mm.h b/arch/m68k/include/asm/uaccess_mm.h deleted file mode 100644 index 9ae9f8d05925..000000000000 --- a/arch/m68k/include/asm/uaccess_mm.h +++ /dev/null @@ -1,390 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef __M68K_UACCESS_H -#define __M68K_UACCESS_H - -/* - * User space memory access functions - */ -#include <linux/compiler.h> -#include <linux/types.h> -#include <asm/segment.h> - -/* We let the MMU do all checking */ -static inline int access_ok(const void __user *addr, - unsigned long size) -{ - return 1; -} - -/* - * Not all varients of the 68k family support the notion of address spaces. - * The traditional 680x0 parts do, and they use the sfc/dfc registers and - * the "moves" instruction to access user space from kernel space. Other - * family members like ColdFire don't support this, and only have a single - * address space, and use the usual "move" instruction for user space access. - * - * Outside of this difference the user space access functions are the same. - * So lets keep the code simple and just define in what we need to use. - */ -#ifdef CONFIG_CPU_HAS_ADDRESS_SPACES -#define MOVES "moves" -#else -#define MOVES "move" -#endif - -extern int __put_user_bad(void); -extern int __get_user_bad(void); - -#define __put_user_asm(res, x, ptr, bwl, reg, err) \ -asm volatile ("\n" \ - "1: "MOVES"."#bwl" %2,%1\n" \ - "2:\n" \ - " .section .fixup,\"ax\"\n" \ - " .even\n" \ - "10: moveq.l %3,%0\n" \ - " jra 2b\n" \ - " .previous\n" \ - "\n" \ - " .section __ex_table,\"a\"\n" \ - " .align 4\n" \ - " .long 1b,10b\n" \ - " .long 2b,10b\n" \ - " .previous" \ - : "+d" (res), "=m" (*(ptr)) \ - : #reg (x), "i" (err)) - -/* - * These are the main single-value transfer routines. They automatically - * use the right size if we just have the right pointer type. - */ - -#define __put_user(x, ptr) \ -({ \ - typeof(*(ptr)) __pu_val = (x); \ - int __pu_err = 0; \ - __chk_user_ptr(ptr); \ - switch (sizeof (*(ptr))) { \ - case 1: \ - __put_user_asm(__pu_err, __pu_val, ptr, b, d, -EFAULT); \ - break; \ - case 2: \ - __put_user_asm(__pu_err, __pu_val, ptr, w, r, -EFAULT); \ - break; \ - case 4: \ - __put_user_asm(__pu_err, __pu_val, ptr, l, r, -EFAULT); \ - break; \ - case 8: \ - { \ - const void __user *__pu_ptr = (ptr); \ - asm volatile ("\n" \ - "1: "MOVES".l %2,(%1)+\n" \ - "2: "MOVES".l %R2,(%1)\n" \ - "3:\n" \ - " .section .fixup,\"ax\"\n" \ - " .even\n" \ - "10: movel %3,%0\n" \ - " jra 3b\n" \ - " .previous\n" \ - "\n" \ - " .section __ex_table,\"a\"\n" \ - " .align 4\n" \ - " .long 1b,10b\n" \ - " .long 2b,10b\n" \ - " .long 3b,10b\n" \ - " .previous" \ - : "+d" (__pu_err), "+a" (__pu_ptr) \ - : "r" (__pu_val), "i" (-EFAULT) \ - : "memory"); \ - break; \ - } \ - default: \ - __pu_err = __put_user_bad(); \ - break; \ - } \ - __pu_err; \ -}) -#define put_user(x, ptr) __put_user(x, ptr) - - -#define __get_user_asm(res, x, ptr, type, bwl, reg, err) ({ \ - type __gu_val; \ - asm volatile ("\n" \ - "1: "MOVES"."#bwl" %2,%1\n" \ - "2:\n" \ - " .section .fixup,\"ax\"\n" \ - " .even\n" \ - "10: move.l %3,%0\n" \ - " sub.l %1,%1\n" \ - " jra 2b\n" \ - " .previous\n" \ - "\n" \ - " .section __ex_table,\"a\"\n" \ - " .align 4\n" \ - " .long 1b,10b\n" \ - " .previous" \ - : "+d" (res), "=&" #reg (__gu_val) \ - : "m" (*(ptr)), "i" (err)); \ - (x) = (__force typeof(*(ptr)))(__force unsigned long)__gu_val; \ -}) - -#define __get_user(x, ptr) \ -({ \ - int __gu_err = 0; \ - __chk_user_ptr(ptr); \ - switch (sizeof(*(ptr))) { \ - case 1: \ - __get_user_asm(__gu_err, x, ptr, u8, b, d, -EFAULT); \ - break; \ - case 2: \ - __get_user_asm(__gu_err, x, ptr, u16, w, r, -EFAULT); \ - break; \ - case 4: \ - __get_user_asm(__gu_err, x, ptr, u32, l, r, -EFAULT); \ - break; \ - case 8: { \ - const void __user *__gu_ptr = (ptr); \ - union { \ - u64 l; \ - __typeof__(*(ptr)) t; \ - } __gu_val; \ - asm volatile ("\n" \ - "1: "MOVES".l (%2)+,%1\n" \ - "2: "MOVES".l (%2),%R1\n" \ - "3:\n" \ - " .section .fixup,\"ax\"\n" \ - " .even\n" \ - "10: move.l %3,%0\n" \ - " sub.l %1,%1\n" \ - " sub.l %R1,%R1\n" \ - " jra 3b\n" \ - " .previous\n" \ - "\n" \ - " .section __ex_table,\"a\"\n" \ - " .align 4\n" \ - " .long 1b,10b\n" \ - " .long 2b,10b\n" \ - " .previous" \ - : "+d" (__gu_err), "=&r" (__gu_val.l), \ - "+a" (__gu_ptr) \ - : "i" (-EFAULT) \ - : "memory"); \ - (x) = __gu_val.t; \ - break; \ - } \ - default: \ - __gu_err = __get_user_bad(); \ - break; \ - } \ - __gu_err; \ -}) -#define get_user(x, ptr) __get_user(x, ptr) - -unsigned long __generic_copy_from_user(void *to, const void __user *from, unsigned long n); -unsigned long __generic_copy_to_user(void __user *to, const void *from, unsigned long n); - -#define __suffix0 -#define __suffix1 b -#define __suffix2 w -#define __suffix4 l - -#define ____constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3)\ - asm volatile ("\n" \ - "1: "MOVES"."#s1" (%2)+,%3\n" \ - " move."#s1" %3,(%1)+\n" \ - " .ifnc \""#s2"\",\"\"\n" \ - "2: "MOVES"."#s2" (%2)+,%3\n" \ - " move."#s2" %3,(%1)+\n" \ - " .ifnc \""#s3"\",\"\"\n" \ - "3: "MOVES"."#s3" (%2)+,%3\n" \ - " move."#s3" %3,(%1)+\n" \ - " .endif\n" \ - " .endif\n" \ - "4:\n" \ - " .section __ex_table,\"a\"\n" \ - " .align 4\n" \ - " .long 1b,10f\n" \ - " .ifnc \""#s2"\",\"\"\n" \ - " .long 2b,20f\n" \ - " .ifnc \""#s3"\",\"\"\n" \ - " .long 3b,30f\n" \ - " .endif\n" \ - " .endif\n" \ - " .previous\n" \ - "\n" \ - " .section .fixup,\"ax\"\n" \ - " .even\n" \ - "10: addq.l #"#n1",%0\n" \ - " .ifnc \""#s2"\",\"\"\n" \ - "20: addq.l #"#n2",%0\n" \ - " .ifnc \""#s3"\",\"\"\n" \ - "30: addq.l #"#n3",%0\n" \ - " .endif\n" \ - " .endif\n" \ - " jra 4b\n" \ - " .previous\n" \ - : "+d" (res), "+&a" (to), "+a" (from), "=&d" (tmp) \ - : : "memory") - -#define ___constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3)\ - ____constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3) -#define __constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3) \ - ___constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, \ - __suffix##n1, __suffix##n2, __suffix##n3) - -static __always_inline unsigned long -__constant_copy_from_user(void *to, const void __user *from, unsigned long n) -{ - unsigned long res = 0, tmp; - - switch (n) { - case 1: - __constant_copy_from_user_asm(res, to, from, tmp, 1, 0, 0); - break; - case 2: - __constant_copy_from_user_asm(res, to, from, tmp, 2, 0, 0); - break; - case 3: - __constant_copy_from_user_asm(res, to, from, tmp, 2, 1, 0); - break; - case 4: - __constant_copy_from_user_asm(res, to, from, tmp, 4, 0, 0); - break; - case 5: - __constant_copy_from_user_asm(res, to, from, tmp, 4, 1, 0); - break; - case 6: - __constant_copy_from_user_asm(res, to, from, tmp, 4, 2, 0); - break; - case 7: - __constant_copy_from_user_asm(res, to, from, tmp, 4, 2, 1); - break; - case 8: - __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 0); - break; - case 9: - __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 1); - break; - case 10: - __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 2); - break; - case 12: - __constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 4); - break; - default: - /* we limit the inlined version to 3 moves */ - return __generic_copy_from_user(to, from, n); - } - - return res; -} - -#define __constant_copy_to_user_asm(res, to, from, tmp, n, s1, s2, s3) \ - asm volatile ("\n" \ - " move."#s1" (%2)+,%3\n" \ - "11: "MOVES"."#s1" %3,(%1)+\n" \ - "12: move."#s2" (%2)+,%3\n" \ - "21: "MOVES"."#s2" %3,(%1)+\n" \ - "22:\n" \ - " .ifnc \""#s3"\",\"\"\n" \ - " move."#s3" (%2)+,%3\n" \ - "31: "MOVES"."#s3" %3,(%1)+\n" \ - "32:\n" \ - " .endif\n" \ - "4:\n" \ - "\n" \ - " .section __ex_table,\"a\"\n" \ - " .align 4\n" \ - " .long 11b,5f\n" \ - " .long 12b,5f\n" \ - " .long 21b,5f\n" \ - " .long 22b,5f\n" \ - " .ifnc \""#s3"\",\"\"\n" \ - " .long 31b,5f\n" \ - " .long 32b,5f\n" \ - " .endif\n" \ - " .previous\n" \ - "\n" \ - " .section .fixup,\"ax\"\n" \ - " .even\n" \ - "5: moveq.l #"#n",%0\n" \ - " jra 4b\n" \ - " .previous\n" \ - : "+d" (res), "+a" (to), "+a" (from), "=&d" (tmp) \ - : : "memory") - -static __always_inline unsigned long -__constant_copy_to_user(void __user *to, const void *from, unsigned long n) -{ - unsigned long res = 0, tmp; - - switch (n) { - case 1: - __put_user_asm(res, *(u8 *)from, (u8 __user *)to, b, d, 1); - break; - case 2: - __put_user_asm(res, *(u16 *)from, (u16 __user *)to, w, r, 2); - break; - case 3: - __constant_copy_to_user_asm(res, to, from, tmp, 3, w, b,); - break; - case 4: - __put_user_asm(res, *(u32 *)from, (u32 __user *)to, l, r, 4); - break; - case 5: - __constant_copy_to_user_asm(res, to, from, tmp, 5, l, b,); - break; - case 6: - __constant_copy_to_user_asm(res, to, from, tmp, 6, l, w,); - break; - case 7: - __constant_copy_to_user_asm(res, to, from, tmp, 7, l, w, b); - break; - case 8: - __constant_copy_to_user_asm(res, to, from, tmp, 8, l, l,); - break; - case 9: - __constant_copy_to_user_asm(res, to, from, tmp, 9, l, l, b); - break; - case 10: - __constant_copy_to_user_asm(res, to, from, tmp, 10, l, l, w); - break; - case 12: - __constant_copy_to_user_asm(res, to, from, tmp, 12, l, l, l); - break; - default: - /* limit the inlined version to 3 moves */ - return __generic_copy_to_user(to, from, n); - } - - return res; -} - -static inline unsigned long -raw_copy_from_user(void *to, const void __user *from, unsigned long n) -{ - if (__builtin_constant_p(n)) - return __constant_copy_from_user(to, from, n); - return __generic_copy_from_user(to, from, n); -} - -static inline unsigned long -raw_copy_to_user(void __user *to, const void *from, unsigned long n) -{ - if (__builtin_constant_p(n)) - return __constant_copy_to_user(to, from, n); - return __generic_copy_to_user(to, from, n); -} -#define INLINE_COPY_FROM_USER -#define INLINE_COPY_TO_USER - -#define user_addr_max() \ - (uaccess_kernel() ? ~0UL : TASK_SIZE) - -extern long strncpy_from_user(char *dst, const char __user *src, long count); -extern __must_check long strnlen_user(const char __user *str, long n); - -unsigned long __clear_user(void __user *to, unsigned long n); - -#define clear_user __clear_user - -#endif /* _M68K_UACCESS_H */ diff --git a/arch/m68k/include/asm/uaccess_no.h b/arch/m68k/include/asm/uaccess_no.h deleted file mode 100644 index dcfb69361408..000000000000 --- a/arch/m68k/include/asm/uaccess_no.h +++ /dev/null @@ -1,160 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef __M68KNOMMU_UACCESS_H -#define __M68KNOMMU_UACCESS_H - -/* - * User space memory access functions - */ -#include <linux/string.h> - -#include <asm/segment.h> - -#define access_ok(addr,size) _access_ok((unsigned long)(addr),(size)) - -/* - * It is not enough to just have access_ok check for a real RAM address. - * This would disallow the case of code/ro-data running XIP in flash/rom. - * Ideally we would check the possible flash ranges too, but that is - * currently not so easy. - */ -static inline int _access_ok(unsigned long addr, unsigned long size) -{ - return 1; -} - -/* - * These are the main single-value transfer routines. They automatically - * use the right size if we just have the right pointer type. - */ - -#define put_user(x, ptr) \ -({ \ - int __pu_err = 0; \ - typeof(*(ptr)) __pu_val = (x); \ - switch (sizeof (*(ptr))) { \ - case 1: \ - __put_user_asm(__pu_err, __pu_val, ptr, b); \ - break; \ - case 2: \ - __put_user_asm(__pu_err, __pu_val, ptr, w); \ - break; \ - case 4: \ - __put_user_asm(__pu_err, __pu_val, ptr, l); \ - break; \ - case 8: \ - memcpy((void __force *)ptr, &__pu_val, sizeof(*(ptr))); \ - break; \ - default: \ - __pu_err = __put_user_bad(); \ - break; \ - } \ - __pu_err; \ -}) -#define __put_user(x, ptr) put_user(x, ptr) - -extern int __put_user_bad(void); - -/* - * Tell gcc we read from memory instead of writing: this is because - * we do not write to any memory gcc knows about, so there are no - * aliasing issues. - */ - -#define __ptr(x) ((unsigned long __user *)(x)) - -#define __put_user_asm(err,x,ptr,bwl) \ - __asm__ ("move" #bwl " %0,%1" \ - : /* no outputs */ \ - :"d" (x),"m" (*__ptr(ptr)) : "memory") - -#define get_user(x, ptr) \ -({ \ - int __gu_err = 0; \ - switch (sizeof(*(ptr))) { \ - case 1: \ - __get_user_asm(__gu_err, x, ptr, b, "=d"); \ - break; \ - case 2: \ - __get_user_asm(__gu_err, x, ptr, w, "=r"); \ - break; \ - case 4: \ - __get_user_asm(__gu_err, x, ptr, l, "=r"); \ - break; \ - case 8: { \ - union { \ - u64 l; \ - __typeof__(*(ptr)) t; \ - } __gu_val; \ - memcpy(&__gu_val.l, (const void __force *)ptr, sizeof(__gu_val.l)); \ - (x) = __gu_val.t; \ - break; \ - } \ - default: \ - __gu_err = __get_user_bad(); \ - break; \ - } \ - __gu_err; \ -}) -#define __get_user(x, ptr) get_user(x, ptr) - -extern int __get_user_bad(void); - -#define __get_user_asm(err,x,ptr,bwl,reg) \ - __asm__ ("move" #bwl " %1,%0" \ - : "=d" (x) \ - : "m" (*__ptr(ptr))) - -static inline unsigned long -raw_copy_from_user(void *to, const void __user *from, unsigned long n) -{ - memcpy(to, (__force const void *)from, n); - return 0; -} - -static inline unsigned long -raw_copy_to_user(void __user *to, const void *from, unsigned long n) -{ - memcpy((__force void *)to, from, n); - return 0; -} -#define INLINE_COPY_FROM_USER -#define INLINE_COPY_TO_USER - -/* - * Copy a null terminated string from userspace. - */ - -static inline long -strncpy_from_user(char *dst, const char *src, long count) -{ - char *tmp; - strncpy(dst, src, count); - for (tmp = dst; *tmp && count > 0; tmp++, count--) - ; - return(tmp - dst); /* DAVIDM should we count a NUL ? check getname */ -} - -/* - * Return the size of a string (including the ending 0) - * - * Return 0 on exception, a value greater than N if too long - */ -static inline long strnlen_user(const char *src, long n) -{ - return(strlen(src) + 1); /* DAVIDM make safer */ -} - -/* - * Zero Userspace - */ - -static inline unsigned long -__clear_user(void *to, unsigned long n) -{ - memset(to, 0, n); - return 0; -} - -#define clear_user(to,n) __clear_user(to,n) - -#endif /* _M68KNOMMU_UACCESS_H */ diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c index a98fca977073..a85f59bc1c35 100644 --- a/arch/m68k/kernel/signal.c +++ b/arch/m68k/kernel/signal.c @@ -920,7 +920,8 @@ static int setup_frame(struct ksignal *ksig, sigset_t *set, err |= __put_user(0x70004e40 + (__NR_sigreturn << 16), (long __user *)(frame->retcode)); #else - err |= __put_user((void *) ret_from_user_signal, &frame->pretcode); + err |= __put_user((long) ret_from_user_signal, + (long __user *) &frame->pretcode); #endif if (err) @@ -1004,7 +1005,8 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, err |= __put_user(0x4e40, (short __user *)(frame->retcode + 4)); #endif #else - err |= __put_user((void *) ret_from_user_rt_signal, &frame->pretcode); + err |= __put_user((long) ret_from_user_rt_signal, + (long __user *) &frame->pretcode); #endif /* CONFIG_MMU */ if (err) |