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154 lines
2.9 KiB
154 lines
2.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* una_asm.S: Kernel unaligned trap assembler helpers. |
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* |
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* Copyright (C) 1996,2005,2008 David S. Miller (davem@davemloft.net) |
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* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
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*/ |
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#include <linux/errno.h> |
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.text |
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retl_efault: |
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retl |
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mov -EFAULT, %o0 |
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/* int __do_int_store(unsigned long *dst_addr, int size, |
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* unsigned long *src_val) |
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* |
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* %o0 = dest_addr |
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* %o1 = size |
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* %o2 = src_val |
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* |
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* Return '0' on success, -EFAULT on failure. |
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*/ |
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.globl __do_int_store |
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__do_int_store: |
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ld [%o2], %g1 |
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cmp %o1, 2 |
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be 2f |
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cmp %o1, 4 |
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be 1f |
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srl %g1, 24, %g2 |
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srl %g1, 16, %g7 |
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4: stb %g2, [%o0] |
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srl %g1, 8, %g2 |
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5: stb %g7, [%o0 + 1] |
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ld [%o2 + 4], %g7 |
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6: stb %g2, [%o0 + 2] |
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srl %g7, 24, %g2 |
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7: stb %g1, [%o0 + 3] |
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srl %g7, 16, %g1 |
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8: stb %g2, [%o0 + 4] |
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srl %g7, 8, %g2 |
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9: stb %g1, [%o0 + 5] |
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10: stb %g2, [%o0 + 6] |
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b 0f |
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11: stb %g7, [%o0 + 7] |
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1: srl %g1, 16, %g7 |
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12: stb %g2, [%o0] |
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srl %g1, 8, %g2 |
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13: stb %g7, [%o0 + 1] |
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14: stb %g2, [%o0 + 2] |
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b 0f |
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15: stb %g1, [%o0 + 3] |
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2: srl %g1, 8, %g2 |
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16: stb %g2, [%o0] |
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17: stb %g1, [%o0 + 1] |
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0: retl |
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mov 0, %o0 |
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.section __ex_table,#alloc |
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.word 4b, retl_efault |
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.word 5b, retl_efault |
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.word 6b, retl_efault |
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.word 7b, retl_efault |
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.word 8b, retl_efault |
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.word 9b, retl_efault |
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.word 10b, retl_efault |
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.word 11b, retl_efault |
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.word 12b, retl_efault |
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.word 13b, retl_efault |
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.word 14b, retl_efault |
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.word 15b, retl_efault |
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.word 16b, retl_efault |
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.word 17b, retl_efault |
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.previous |
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/* int do_int_load(unsigned long *dest_reg, int size, |
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* unsigned long *saddr, int is_signed) |
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* |
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* %o0 = dest_reg |
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* %o1 = size |
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* %o2 = saddr |
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* %o3 = is_signed |
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* |
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* Return '0' on success, -EFAULT on failure. |
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*/ |
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.globl do_int_load |
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do_int_load: |
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cmp %o1, 8 |
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be 9f |
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cmp %o1, 4 |
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be 6f |
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4: ldub [%o2], %g1 |
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5: ldub [%o2 + 1], %g2 |
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sll %g1, 8, %g1 |
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tst %o3 |
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be 3f |
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or %g1, %g2, %g1 |
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sll %g1, 16, %g1 |
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sra %g1, 16, %g1 |
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3: b 0f |
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st %g1, [%o0] |
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6: ldub [%o2 + 1], %g2 |
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sll %g1, 24, %g1 |
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7: ldub [%o2 + 2], %g7 |
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sll %g2, 16, %g2 |
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8: ldub [%o2 + 3], %g3 |
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sll %g7, 8, %g7 |
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or %g3, %g2, %g3 |
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or %g7, %g3, %g7 |
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or %g1, %g7, %g1 |
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b 0f |
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st %g1, [%o0] |
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9: ldub [%o2], %g1 |
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10: ldub [%o2 + 1], %g2 |
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sll %g1, 24, %g1 |
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11: ldub [%o2 + 2], %g7 |
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sll %g2, 16, %g2 |
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12: ldub [%o2 + 3], %g3 |
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sll %g7, 8, %g7 |
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or %g1, %g2, %g1 |
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or %g7, %g3, %g7 |
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or %g1, %g7, %g7 |
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13: ldub [%o2 + 4], %g1 |
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st %g7, [%o0] |
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14: ldub [%o2 + 5], %g2 |
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sll %g1, 24, %g1 |
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15: ldub [%o2 + 6], %g7 |
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sll %g2, 16, %g2 |
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16: ldub [%o2 + 7], %g3 |
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sll %g7, 8, %g7 |
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or %g1, %g2, %g1 |
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or %g7, %g3, %g7 |
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or %g1, %g7, %g7 |
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st %g7, [%o0 + 4] |
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0: retl |
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mov 0, %o0 |
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.section __ex_table,#alloc |
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.word 4b, retl_efault |
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.word 5b, retl_efault |
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.word 6b, retl_efault |
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.word 7b, retl_efault |
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.word 8b, retl_efault |
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.word 9b, retl_efault |
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.word 10b, retl_efault |
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.word 11b, retl_efault |
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.word 12b, retl_efault |
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.word 13b, retl_efault |
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.word 14b, retl_efault |
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.word 15b, retl_efault |
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.word 16b, retl_efault |
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.previous
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