^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/arch/arm/lib/putuser.S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2001 Russell King
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Idea from x86 version, (C) Copyright 1998 Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * These functions have a non-standard call interface to make
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * them more efficient, especially as they return an error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * value in addition to the "real" return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * __put_user_X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * Inputs: r0 contains the address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * r1 contains the address limit, which must be preserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * r2, r3 contains the value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Outputs: r0 is the error code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * lr corrupted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * No other registers must be altered. (see <asm/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * for specific ASM register usage).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * Note that ADDR_LIMIT is either 0 or 0xc0000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * Note also that it is intended that __put_user_bad is not global.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/assembler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <asm/domain.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) ENTRY(__put_user_1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) check_uaccess r0, 1, r1, ip, __put_user_bad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 1: TUSER(strb) r2, [r0]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) mov r0, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) ret lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) ENDPROC(__put_user_1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) ENTRY(__put_user_2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) check_uaccess r0, 2, r1, ip, __put_user_bad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #if __LINUX_ARM_ARCH__ >= 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 2: TUSER(strh) r2, [r0]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) mov ip, r2, lsr #8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #ifndef __ARMEB__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 2: TUSER(strb) r2, [r0], #1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 3: TUSER(strb) ip, [r0]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 2: TUSER(strb) ip, [r0], #1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 3: TUSER(strb) r2, [r0]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #endif /* __LINUX_ARM_ARCH__ >= 6 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) mov r0, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) ret lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) ENDPROC(__put_user_2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) ENTRY(__put_user_4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) check_uaccess r0, 4, r1, ip, __put_user_bad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 4: TUSER(str) r2, [r0]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) mov r0, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) ret lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) ENDPROC(__put_user_4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) ENTRY(__put_user_8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) check_uaccess r0, 8, r1, ip, __put_user_bad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #ifdef CONFIG_THUMB2_KERNEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 5: TUSER(str) r2, [r0]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 6: TUSER(str) r3, [r0, #4]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 5: TUSER(str) r2, [r0], #4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 6: TUSER(str) r3, [r0]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) mov r0, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ret lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ENDPROC(__put_user_8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) __put_user_bad:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) mov r0, #-EFAULT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) ret lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) ENDPROC(__put_user_bad)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .pushsection __ex_table, "a"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .long 1b, __put_user_bad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .long 2b, __put_user_bad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #if __LINUX_ARM_ARCH__ < 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .long 3b, __put_user_bad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .long 4b, __put_user_bad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .long 5b, __put_user_bad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .long 6b, __put_user_bad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .popsection
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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