una_asm_32.S (2983B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2/* una_asm.S: Kernel unaligned trap assembler helpers. 3 * 4 * Copyright (C) 1996,2005,2008 David S. Miller (davem@davemloft.net) 5 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 6 */ 7 8#include <linux/errno.h> 9 10 .text 11 12retl_efault: 13 retl 14 mov -EFAULT, %o0 15 16 /* int __do_int_store(unsigned long *dst_addr, int size, 17 * unsigned long *src_val) 18 * 19 * %o0 = dest_addr 20 * %o1 = size 21 * %o2 = src_val 22 * 23 * Return '0' on success, -EFAULT on failure. 24 */ 25 .globl __do_int_store 26__do_int_store: 27 ld [%o2], %g1 28 cmp %o1, 2 29 be 2f 30 cmp %o1, 4 31 be 1f 32 srl %g1, 24, %g2 33 srl %g1, 16, %g7 344: stb %g2, [%o0] 35 srl %g1, 8, %g2 365: stb %g7, [%o0 + 1] 37 ld [%o2 + 4], %g7 386: stb %g2, [%o0 + 2] 39 srl %g7, 24, %g2 407: stb %g1, [%o0 + 3] 41 srl %g7, 16, %g1 428: stb %g2, [%o0 + 4] 43 srl %g7, 8, %g2 449: stb %g1, [%o0 + 5] 4510: stb %g2, [%o0 + 6] 46 b 0f 4711: stb %g7, [%o0 + 7] 481: srl %g1, 16, %g7 4912: stb %g2, [%o0] 50 srl %g1, 8, %g2 5113: stb %g7, [%o0 + 1] 5214: stb %g2, [%o0 + 2] 53 b 0f 5415: stb %g1, [%o0 + 3] 552: srl %g1, 8, %g2 5616: stb %g2, [%o0] 5717: stb %g1, [%o0 + 1] 580: retl 59 mov 0, %o0 60 61 .section __ex_table,#alloc 62 .word 4b, retl_efault 63 .word 5b, retl_efault 64 .word 6b, retl_efault 65 .word 7b, retl_efault 66 .word 8b, retl_efault 67 .word 9b, retl_efault 68 .word 10b, retl_efault 69 .word 11b, retl_efault 70 .word 12b, retl_efault 71 .word 13b, retl_efault 72 .word 14b, retl_efault 73 .word 15b, retl_efault 74 .word 16b, retl_efault 75 .word 17b, retl_efault 76 .previous 77 78 /* int do_int_load(unsigned long *dest_reg, int size, 79 * unsigned long *saddr, int is_signed) 80 * 81 * %o0 = dest_reg 82 * %o1 = size 83 * %o2 = saddr 84 * %o3 = is_signed 85 * 86 * Return '0' on success, -EFAULT on failure. 87 */ 88 .globl do_int_load 89do_int_load: 90 cmp %o1, 8 91 be 9f 92 cmp %o1, 4 93 be 6f 944: ldub [%o2], %g1 955: ldub [%o2 + 1], %g2 96 sll %g1, 8, %g1 97 tst %o3 98 be 3f 99 or %g1, %g2, %g1 100 sll %g1, 16, %g1 101 sra %g1, 16, %g1 1023: b 0f 103 st %g1, [%o0] 1046: ldub [%o2 + 1], %g2 105 sll %g1, 24, %g1 1067: ldub [%o2 + 2], %g7 107 sll %g2, 16, %g2 1088: ldub [%o2 + 3], %g3 109 sll %g7, 8, %g7 110 or %g3, %g2, %g3 111 or %g7, %g3, %g7 112 or %g1, %g7, %g1 113 b 0f 114 st %g1, [%o0] 1159: ldub [%o2], %g1 11610: ldub [%o2 + 1], %g2 117 sll %g1, 24, %g1 11811: ldub [%o2 + 2], %g7 119 sll %g2, 16, %g2 12012: ldub [%o2 + 3], %g3 121 sll %g7, 8, %g7 122 or %g1, %g2, %g1 123 or %g7, %g3, %g7 124 or %g1, %g7, %g7 12513: ldub [%o2 + 4], %g1 126 st %g7, [%o0] 12714: ldub [%o2 + 5], %g2 128 sll %g1, 24, %g1 12915: ldub [%o2 + 6], %g7 130 sll %g2, 16, %g2 13116: ldub [%o2 + 7], %g3 132 sll %g7, 8, %g7 133 or %g1, %g2, %g1 134 or %g7, %g3, %g7 135 or %g1, %g7, %g7 136 st %g7, [%o0 + 4] 1370: retl 138 mov 0, %o0 139 140 .section __ex_table,#alloc 141 .word 4b, retl_efault 142 .word 5b, retl_efault 143 .word 6b, retl_efault 144 .word 7b, retl_efault 145 .word 8b, retl_efault 146 .word 9b, retl_efault 147 .word 10b, retl_efault 148 .word 11b, retl_efault 149 .word 12b, retl_efault 150 .word 13b, retl_efault 151 .word 14b, retl_efault 152 .word 15b, retl_efault 153 .word 16b, retl_efault 154 .previous