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0.597, 0.848, 0.633 ], "angle": 0, "content": null, "poly": [ 241, 1396, 1402, 1396, 1402, 1480, 241, 1480 ] }, { "type": "text", "bbox": [ 0.216, 0.639, 0.695, 0.655 ], "angle": 0, "content": null, "poly": [ 357, 1494, 1149, 1494, 1149, 1532, 357, 1532 ] }, { "type": "text", "bbox": [ 0.198, 0.66, 0.416, 0.675 ], "angle": 0, "content": null, "poly": [ 327, 1543, 688, 1543, 688, 1578, 327, 1578 ] }, { "type": "text", "bbox": [ 0.198, 0.682, 0.604, 0.697 ], "angle": 0, "content": null, "poly": [ 327, 1595, 999, 1595, 999, 1630, 327, 1630 ] }, { "type": "list", "bbox": [ 0.146, 0.597, 0.848, 0.697 ], "angle": 0, "content": null }, { "type": "code", "bbox": [ 0.251, 0.703, 0.424, 0.761 ], "angle": 0, "content": " $ ./configure $ make $ sudo make install" }, { "type": "title", "bbox": [ 0.182, 0.773, 0.365, 0.789 ], "angle": 0, "content": null, "poly": [ 301, 1808, 603, 1808, 603, 1845, 301, 1845 ] }, { "type": "text", "bbox": [ 0.182, 0.804, 0.46, 0.82 ], "angle": 0, "content": null, 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], "angle": 0, "content": null, "poly": [ 357, 951, 701, 951, 701, 984, 357, 984 ] }, { "type": "text", "bbox": [ 0.182, 0.427, 0.497, 0.442 ], "angle": 0, "content": null, "poly": [ 301, 998, 822, 998, 822, 1033, 301, 1033 ] }, { "type": "code", "bbox": [ 0.185, 0.449, 0.779, 0.585 ], "angle": 0, "content": "static int effective_prio(struct task_struct *p) { p->normal_prio = normal_prio(p); /* If we are RT tasks or we were boosted to RT priority, * keep the priority unchanged. Otherwise, update priority * to the normal priority: */ if (!rt_prio(p->prio)) return p->normal_prio; return p->prio; }" }, { "type": "title", "bbox": [ 0.19, 0.597, 0.319, 0.611 ], "angle": 0, "content": null, "poly": [ 314, 1396, 527, 1396, 527, 1429, 314, 1429 ] }, { "type": "text", "bbox": [ 0.146, 0.617, 0.84, 0.653 ], "angle": 0, "content": null, "poly": [ 241, 1443, 1389, 1443, 1389, 1527, 241, 1527 ] }, { "type": "title", "bbox": [ 0.19, 0.66, 0.323, 0.673 ], "angle": 0, "content": null, "poly": [ 314, 1543, 534, 1543, 534, 1574, 314, 1574 ] }, { "type": "text", "bbox": [ 0.181, 0.68, 0.723, 0.695 ], "angle": 0, "content": null, "poly": [ 299, 1590, 1195, 1590, 1195, 1625, 299, 1625 ] }, { "type": "title", "bbox": [ 0.19, 0.702, 0.289, 0.716 ], "angle": 0, "content": null, "poly": [ 314, 1641, 478, 1641, 478, 1674, 314, 1674 ] }, { "type": "text", "bbox": [ 0.182, 0.722, 0.837, 0.737 ], "angle": 0, "content": null, "poly": [ 301, 1688, 1384, 1688, 1384, 1723, 301, 1723 ] }, { "type": "text", "bbox": [ 0.183, 0.745, 0.32, 0.759 ], "angle": 0, "content": null, "poly": [ 302, 1742, 529, 1742, 529, 1775, 302, 1775 ] }, { "type": "text", "bbox": [ 0.182, 0.765, 0.418, 0.78 ], "angle": 0, "content": null, "poly": [ 301, 1789, 691, 1789, 691, 1824, 301, 1824 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "code", "bbox": [ 0.186, 0.088, 0.653, 0.23 ], "angle": 0, "content": "```java\nstatic inline int normal_prio(struct task_struct *p) {\n int prio;\n if (task_has_DL_policy(p))\n prio = MAX_DL_PRIO-1;\n else if (task_has_rt_policy(p))\n prio = MAX_RT_PRIO-1 - p->rt_priority;\n else\n prio = __normal_prio(p);\n return prio;\n}" }, { "type": "text", "bbox": [ 0.196, 0.24, 0.71, 0.255 ], "angle": 0, "content": null, "poly": [ 324, 561, 1174, 561, 1174, 596, 324, 596 ] }, { "type": "title", "bbox": [ 0.191, 0.286, 0.416, 0.302 ], "angle": 0, "content": null, "poly": [ 315, 668, 688, 668, 688, 706, 315, 706 ] }, { "type": "text", "bbox": [ 0.146, 0.319, 0.844, 0.355 ], "angle": 0, "content": null, "poly": [ 241, 746, 1395, 746, 1395, 830, 241, 830 ] }, { "type": "title", "bbox": [ 0.191, 0.365, 0.356, 0.381 ], "angle": 0, "content": null, "poly": [ 315, 853, 588, 853, 588, 891, 315, 891 ] }, { "type": "text", "bbox": [ 0.146, 0.398, 0.77, 0.433 ], "angle": 0, "content": null, "poly": [ 241, 930, 1273, 930, 1273, 1012, 241, 1012 ] }, { "type": "text", "bbox": [ 0.146, 0.44, 0.847, 0.474 ], "angle": 0, "content": null, "poly": [ 241, 1029, 1400, 1029, 1400, 1108, 241, 1108 ] }, { "type": "list", "bbox": [ 0.146, 0.398, 0.847, 0.474 ], "angle": 0, "content": null }, { "type": "code", "bbox": [ 0.225, 0.477, 0.632, 0.548 ], "angle": 0, "content": "root@ubuntu:/etc/vim# unzip taglist_46.zip \nArchive: taglist_46.zip \ninflating: plugin/taglist.vim \ninflating: doc/taglist.txt \nroot@ubuntu:/etc/vim# ls \ndoc plugin taglist_46.zip vimrc vimrc.tiny" }, { "type": "text", "bbox": [ 0.146, 0.556, 0.848, 0.591 ], "angle": 0, "content": null, "poly": [ 241, 1300, 1402, 1300, 1402, 1382, 241, 1382 ] }, { "type": "text", "bbox": [ 0.194, 0.598, 0.778, 0.612 ], "angle": 0, "content": null, "poly": [ 320, 1398, 1286, 1398, 1286, 1431, 320, 1431 ] }, { "type": "list", "bbox": [ 0.146, 0.556, 0.848, 0.612 ], "angle": 0, "content": null }, { "type": "text", "bbox": [ 0.25, 0.618, 0.802, 0.633 ], "angle": 0, "content": null, "poly": [ 413, 1445, 1326, 1445, 1326, 1480, 413, 1480 ] }, { "type": "text", "bbox": [ 0.251, 0.639, 0.775, 0.655 ], "angle": 0, "content": null, "poly": [ 415, 1494, 1281, 1494, 1281, 1532, 415, 1532 ] }, { "type": "text", "bbox": [ 0.252, 0.662, 0.67, 0.676 ], "angle": 0, "content": null, "poly": [ 416, 1548, 1108, 1548, 1108, 1581, 416, 1581 ] }, { "type": "text", "bbox": [ 0.201, 0.681, 0.7, 0.696 ], "angle": 0, "content": null, "poly": [ 332, 1592, 1157, 1592, 1157, 1627, 332, 1627 ] }, { "type": "title", "bbox": [ 0.182, 0.707, 0.347, 0.723 ], "angle": 0, "content": null, "poly": [ 301, 1653, 573, 1653, 573, 1691, 301, 1691 ] }, { "type": "text", "bbox": [ 0.185, 0.737, 0.482, 0.752 ], "angle": 0, "content": null, "poly": [ 305, 1723, 797, 1723, 797, 1758, 305, 1758 ] }, { "type": "text", "bbox": [ 0.181, 0.757, 0.794, 0.773 ], "angle": 0, "content": null, "poly": [ 299, 1770, 1313, 1770, 1313, 1808, 299, 1808 ] }, { "type": "code", "bbox": [ 0.218, 0.777, 0.33, 0.83 ], "angle": 0, "content": ":Tlist :Tlist0pen :TlistToggle" } ], [ { "type": "header", "bbox": [ 0.376, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 621, 116, 1027, 116, 1027, 147, 621, 147 ] }, { "type": "image", "bbox": [ 0.153, 0.09, 0.85, 0.21 ], "angle": 0, "content": null }, { "type": "text", "bbox": [ 0.146, 0.218, 0.85, 0.271 ], "angle": 0, "content": null, "poly": [ 241, 509, 1405, 509, 1405, 633, 241, 633 ] }, { "type": "image", "bbox": [ 0.153, 0.277, 0.851, 0.359 ], "angle": 0, "content": null }, 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[ 301, 1344, 757, 1344, 757, 1377, 301, 1377 ] }, { "type": "text", "bbox": [ 0.183, 0.594, 0.478, 0.608 ], "angle": 0, "content": null, "poly": [ 302, 1389, 790, 1389, 790, 1422, 302, 1422 ] }, { "type": "text", "bbox": [ 0.182, 0.612, 0.478, 0.627 ], "angle": 0, "content": null, "poly": [ 301, 1431, 790, 1431, 790, 1466, 301, 1466 ] }, { "type": "text", "bbox": [ 0.146, 0.631, 0.838, 0.665 ], "angle": 0, "content": null, "poly": [ 241, 1475, 1386, 1475, 1386, 1555, 241, 1555 ] }, { "type": "code", "bbox": [ 0.288, 0.685, 0.712, 0.773 ], "angle": 0, "content": "Cscope tag: effective_priorio\n# line filename / context / line\n1 1761 kernel/sched.c <prio = effective_prio(p);\n2 4098 kernel/sched.c <> p->prio = effective_prio(p);\nType number and (empty Cancelcs):" }, { "type": "text", "bbox": [ 0.182, 0.795, 0.478, 0.81 ], "angle": 0, "content": null, "poly": [ 301, 1859, 790, 1859, 790, 1894, 301, 1894 ] }, { "type": "title", "bbox": [ 0.182, 0.814, 0.378, 0.829 ], "angle": 0, 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AT&T 格式Intel 格式
pushl %eaxpush eax
pushl $1push 1
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AT&T 格式Intel 格式
add1 $1, %eaxadd eax, 1
" }, { "type": "title", "bbox": [ 0.177, 0.793, 0.32, 0.809 ], "angle": 0, "content": null, "poly": [ 292, 1854, 529, 1854, 529, 1892, 292, 1892 ] }, { "type": "text", "bbox": [ 0.146, 0.829, 0.845, 0.9 ], "angle": 0, "content": null, "poly": [ 241, 1939, 1397, 1939, 1397, 2105, 241, 2105 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.064 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 149, 620, 149 ] }, { "type": "table", "bbox": [ 0.205, 0.085, 0.714, 0.141 ], "angle": 0, "content": "
AT&T 格式Intel 格式
movb val, %a1mov al, byte ptr val
" }, { "type": "title", "bbox": [ 0.177, 0.161, 0.405, 0.178 ], "angle": 0, "content": null, "poly": [ 292, 376, 669, 376, 669, 416, 292, 416 ] }, { "type": "text", "bbox": [ 0.146, 0.196, 0.848, 0.232 ], "angle": 0, "content": null, "poly": [ 241, 458, 1402, 458, 1402, 542, 241, 542 ] }, { "type": "title", "bbox": [ 0.177, 0.253, 0.339, 0.27 ], "angle": 0, "content": null, "poly": [ 292, 591, 560, 591, 560, 631, 292, 631 ] }, { "type": "text", "bbox": [ 0.146, 0.289, 0.85, 0.322 ], "angle": 0, "content": null, "poly": [ 241, 675, 1405, 675, 1405, 753, 241, 753 ] }, { "type": "table", "bbox": [ 0.205, 0.324, 0.714, 0.406 ], "angle": 0, "content": "
AT&T 格式Intel 格式
movl -4(%ebp), %eaxmov eax, [ebp - 4]
movl 5(%ebx),%eaxmov eax, [ebx+5]
" }, { "type": "title", "bbox": [ 0.146, 0.426, 0.326, 0.442 ], "angle": 0, "content": null, "poly": [ 241, 996, 539, 996, 539, 1033, 241, 1033 ] }, { "type": "text", "bbox": [ 0.146, 0.461, 0.85, 0.515 ], "angle": 0, "content": null, "poly": [ 241, 1078, 1405, 1078, 1405, 1204, 241, 1204 ] }, { "type": "title", "bbox": [ 0.182, 0.537, 0.396, 0.552 ], "angle": 0, "content": null, "poly": [ 301, 1256, 654, 1256, 654, 1291, 301, 1291 ] }, { "type": "text", "bbox": [ 0.182, 0.572, 0.62, 0.588 ], "angle": 0, "content": null, "poly": [ 301, 1337, 1025, 1337, 1025, 1375, 301, 1375 ] }, { "type": "text", "bbox": [ 0.185, 0.592, 0.47, 0.607 ], "angle": 0, "content": null, "poly": [ 305, 1384, 777, 1384, 777, 1419, 305, 1419 ] }, { "type": "text", "bbox": [ 0.185, 0.611, 0.461, 0.626 ], "angle": 0, "content": null, "poly": [ 305, 1429, 762, 1429, 762, 1464, 305, 1464 ] }, { "type": "text", "bbox": [ 0.185, 0.63, 0.47, 0.644 ], "angle": 0, "content": null, "poly": [ 305, 1473, 777, 1473, 777, 1506, 305, 1506 ] }, { "type": "text", "bbox": [ 0.184, 0.649, 0.203, 0.662 ], "angle": 0, "content": null, "poly": [ 304, 1518, 335, 1518, 335, 1548, 304, 1548 ] }, { "type": "text", "bbox": [ 0.183, 0.667, 0.494, 0.682 ], "angle": 0, "content": null, "poly": [ 302, 1560, 817, 1560, 817, 1595, 302, 1595 ] }, { "type": "text", "bbox": [ 0.191, 0.687, 0.294, 0.701 ], "angle": 0, "content": null, "poly": [ 315, 1606, 486, 1606, 486, 1639, 315, 1639 ] }, { "type": "text", "bbox": [ 0.182, 0.705, 0.644, 0.72 ], "angle": 0, "content": null, "poly": [ 301, 1648, 1065, 1648, 1065, 1684, 301, 1684 ] }, { "type": "text", "bbox": [ 0.191, 0.724, 0.338, 0.739 ], "angle": 0, "content": null, "poly": [ 315, 1693, 559, 1693, 559, 1728, 315, 1728 ] }, { "type": "text", "bbox": [ 0.181, 0.742, 0.812, 0.757 ], "angle": 0, "content": null, "poly": [ 299, 1735, 1343, 1735, 1343, 1770, 299, 1770 ] }, { "type": "text", "bbox": [ 0.191, 0.761, 0.443, 0.776 ], "angle": 0, "content": null, "poly": [ 315, 1779, 732, 1779, 732, 1815, 315, 1815 ] }, { "type": "text", "bbox": [ 0.146, 0.78, 0.842, 0.814 ], "angle": 0, "content": null, "poly": [ 241, 1824, 1392, 1824, 1392, 1903, 241, 1903 ] }, { "type": "text", "bbox": [ 0.182, 0.818, 0.498, 0.834 ], "angle": 0, "content": null, "poly": [ 301, 1913, 823, 1913, 823, 1950, 301, 1950 ] }, { "type": "text", "bbox": [ 0.182, 0.837, 0.555, 0.852 ], "angle": 0, "content": null, "poly": [ 301, 1957, 917, 1957, 917, 1992, 301, 1992 ] }, { "type": "text", "bbox": [ 0.186, 0.856, 0.2, 0.87 ], "angle": 0, "content": null, "poly": [ 307, 2002, 330, 2002, 330, 2034, 307, 2034 ] }, { "type": "text", "bbox": [ 0.234, 0.875, 0.629, 0.89 ], "angle": 0, "content": null, "poly": [ 387, 2046, 1040, 2046, 1040, 2081, 387, 2081 ] }, { "type": "text", "bbox": [ 0.234, 0.894, 0.787, 0.91 ], "angle": 0, "content": null, "poly": [ 387, 2091, 1301, 2091, 1301, 2128, 387, 2128 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.064 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 149, 620, 149 ] }, { "type": "code", "bbox": [ 0.182, 0.089, 0.335, 0.122 ], "angle": 0, "content": "return cr0;" }, { "type": "text", "bbox": [ 0.145, 0.126, 0.859, 0.219 ], "angle": 0, "content": null, "poly": [ 239, 294, 1420, 294, 1420, 512, 239, 512 ] }, { "type": "text", "bbox": [ 0.19, 0.239, 0.489, 0.255 ], "angle": 0, "content": null, "poly": [ 314, 559, 808, 559, 808, 596, 314, 596 ] }, { "type": "text", "bbox": [ 0.146, 0.258, 0.851, 0.312 ], "angle": 0, "content": null, "poly": [ 241, 603, 1407, 603, 1407, 729, 241, 729 ] }, { "type": "text", "bbox": [ 0.182, 0.315, 0.283, 0.33 ], "angle": 0, "content": null, "poly": [ 301, 736, 468, 736, 468, 771, 301, 771 ] }, { "type": "code", "bbox": [ 0.219, 0.333, 0.326, 0.349 ], "angle": 0, "content": "： \\(\\mathbf{\\Pi}^{\\prime \\prime} = \\mathbf{r}^{\\prime \\prime}\\) (cr0)" }, { "type": "text", "bbox": [ 0.146, 0.352, 0.841, 0.387 ], "angle": 0, "content": null, "poly": [ 241, 823, 1391, 823, 1391, 905, 241, 905 ] }, { "type": "text", "bbox": [ 0.182, 0.39, 0.591, 0.406 ], "angle": 0, "content": null, "poly": [ 301, 912, 977, 912, 977, 949, 301, 949 ] }, { "type": "table", "bbox": [ 0.231, 0.406, 0.785, 0.487 ], "angle": 0, "content": "
保留字含义
=只写/输出变量
+可读可写变量
&该输出操作数不能使用输入操作数相同的寄存器
" }, { "type": "text", "bbox": [ 0.183, 0.507, 0.546, 0.522 ], "angle": 0, "content": null, "poly": [ 302, 1185, 903, 1185, 903, 1220, 302, 1220 ] }, { "type": "table", "bbox": [ 0.184, 0.522, 0.785, 0.681 ], "angle": 0, "content": "
约束字母含义
m, v, o表示内存单元
r任意通用寄存器
q寄存器EAX/EBX/ECX/EDX之一
a, b, c, d表示寄存器EAX/EBX/ECX/EDX
S, D寄存器ESI或EDI
A与a+b相同，使用EAX与EBX联合，形成一个64位寄存器
I常数0-31
" }, { "type": "text", "bbox": [ 0.19, 0.701, 0.478, 0.716 ], "angle": 0, "content": null, "poly": [ 314, 1639, 790, 1639, 790, 1674, 314, 1674 ] }, { "type": "text", "bbox": [ 0.145, 0.72, 0.85, 0.829 ], "angle": 0, "content": null, "poly": [ 239, 1684, 1405, 1684, 1405, 1939, 239, 1939 ] }, { "type": "text", "bbox": [ 0.19, 0.833, 0.585, 0.849 ], "angle": 0, "content": null, "poly": [ 314, 1948, 967, 1948, 967, 1985, 314, 1985 ] }, { "type": "text", "bbox": [ 0.146, 0.85, 0.851, 0.884 ], "angle": 0, "content": null, "poly": [ 241, 1988, 1407, 1988, 1407, 2067, 241, 2067 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "text", "bbox": [ 0.146, 0.086, 0.844, 0.12 ], "angle": 0, "content": null, "poly": [ 241, 201, 1395, 201, 1395, 280, 241, 280 ] }, { "type": "text", "bbox": [ 0.146, 0.125, 0.849, 0.178 ], "angle": 0, "content": null, "poly": [ 241, 292, 1404, 292, 1404, 416, 241, 416 ] }, { "type": "code", "bbox": [ 0.18, 0.182, 0.722, 0.198 ], "angle": 0, "content": "define __cli() __asm__ __volatile__( \"cli\": : : \"memory\")" }, { "type": "text", "bbox": [ 0.146, 0.2, 0.85, 0.234 ], "angle": 0, "content": null, "poly": [ 241, 467, 1405, 467, 1405, 547, 241, 547 ] }, { "type": "code", "bbox": [ 0.18, 0.238, 0.64, 0.443 ], "angle": 0, "content": "/\\*Embedded.c\\*/ \nint main() \n{ int \\(\\mathrm{a} = 10\\) ， \\(\\mathrm{b} = 0\\) ： _asm_ volatile_(\"movl %1,%%eax;\\\\n\\\\r\" \"movl%%eax， \\(\\% 0\\) ： \\(^{\\prime \\prime} = \\mathrm{r}^{\\prime \\prime}(\\mathrm{b})\\) /\\*输出部\\*/ :\"\\r\"(a) /\\*输入部\\*/ :\"\\%eax\"); /\\*修改部\\*/ printf(\"Result:%d,%d\\\\n\",a,b); \n}" }, { "type": "title", "bbox": [ 0.182, 0.464, 0.443, 0.48 ], "angle": 0, "content": null, "poly": [ 301, 1085, 732, 1085, 732, 1122, 301, 1122 ] }, { "type": "text", "bbox": [ 0.19, 0.5, 0.309, 0.516 ], "angle": 0, "content": null, "poly": [ 314, 1169, 511, 1169, 511, 1206, 314, 1206 ] }, { "type": "code", "bbox": [ 0.182, 0.519, 0.795, 0.592 ], "angle": 0, "content": "define __save_flags(x) \\ \nasm volatile (\"stc ccr, %w0\": \"=r\" (x)) //将 flags 值压栈 \n#define __restore_flags(x) \\ \nasm volatile (\"ldc %w0, ccr\": \"r\" (x)) //恢复 flags 值到 cpu 中" }, { "type": "text", "bbox": [ 0.191, 0.595, 0.309, 0.61 ], "angle": 0, "content": null, "poly": [ 315, 1391, 511, 1391, 511, 1426, 315, 1426 ] }, { "type": "code", "bbox": [ 0.182, 0.613, 0.842, 0.895 ], "angle": 0, "content": "static inline int strcmp(const char *cs, const char *ct) \n{ \n char res; \n asm(\"\\n\") \n \"1: move.b (%0)+,%2\\n\" /* get *cs */ \n \" cmp.b (%1)+,%2\\n\" /* compare a byte */ \n \" jne 2f\\n\" /* not equal, break out */ \n \" tst.b %2\\n\" /* at end of cs? */ \n \" jne 1b\\n\" /* no, keep going */ \n \" jra 3f\\n\" /* strings are equal */ \n \"2: sub.b -(%1),%2\\n\" /* *cs - *ct */ \n \"3:\" \n : \"+\" (cs), \"+\" (ct), \"=\" (res)); \n return res;" } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "text", "bbox": [ 0.146, 0.088, 0.85, 0.122 ], "angle": 0, "content": null, "poly": [ 241, 205, 1405, 205, 1405, 285, 241, 285 ] }, { "type": "code", "bbox": [ 0.182, 0.126, 0.85, 0.481 ], "angle": 0, "content": "1 extern struct task_struct *FASTCALL(_switch_to(struct task_struct *prev, struct task_struct *next)); \n2 #define switch_to(prev, next, last) do { \n3 unsigned long esi,EDI; \n4 asm volatile(\"pushfl\\n\\t\" /* Save flags */ \n5 \"pushl%%ebp\\n\\t\" \n6 \"mov1%%esp,%0\\n\\t\" /* save ESP */ \n7 \"mov1%5,%%esp\\n\\t\" /* restore ESP */ \n8 \"mov1$1f,%1\\n\\t\" /* save EIP */ \n9 \"push1%6\\n\\t\" /* restore EIP */ \n10 \"jmp __switch_to\\n\" \n11 \"1:\\t\" \n12 \"pop1%%ebp\\n\\t\" \n13 \"popfl\" \n14 :=\"m\" (prev->thread.asp), \"=\"m\" (prev->thread.eip), \n15 :=a\" (last),\"=S\" (esi), \"=\"D\" (edi) \n16 : \"m\" (next->thread.asp), \"m\" (next->thread.eip), \n17 \"2\" (prev), \"d\" (next)); \n18 } while (0)" }, { "type": "text", "bbox": [ 0.183, 0.485, 0.405, 0.5 ], "angle": 0, "content": null, "poly": [ 302, 1134, 669, 1134, 669, 1169, 302, 1169 ] }, { "type": "text", "bbox": [ 0.146, 0.504, 0.85, 0.537 ], "angle": 0, "content": null, "poly": [ 241, 1178, 1405, 1178, 1405, 1256, 241, 1256 ] }, { "type": "text", "bbox": [ 0.182, 0.542, 0.45, 0.556 ], "angle": 0, "content": null, "poly": [ 301, 1267, 744, 1267, 744, 1300, 301, 1300 ] }, { "type": "text", "bbox": [ 0.146, 0.561, 0.834, 0.594 ], "angle": 0, "content": null, "poly": [ 241, 1312, 1379, 1312, 1379, 1389, 241, 1389 ] }, { "type": "text", "bbox": [ 0.145, 0.598, 0.843, 0.651 ], "angle": 0, "content": null, "poly": [ 239, 1398, 1394, 1398, 1394, 1522, 239, 1522 ] }, { "type": "title", "bbox": [ 0.146, 0.692, 0.33, 0.708 ], "angle": 0, "content": null, "poly": [ 241, 1618, 545, 1618, 545, 1656, 241, 1656 ] }, { "type": "title", "bbox": [ 0.147, 0.73, 0.357, 0.745 ], "angle": 0, "content": null, "poly": [ 243, 1707, 590, 1707, 590, 1742, 243, 1742 ] }, { "type": "text", "bbox": [ 0.146, 0.765, 0.849, 0.8 ], "angle": 0, "content": null, "poly": [ 241, 1789, 1404, 1789, 1404, 1871, 241, 1871 ] }, { "type": "text", "bbox": [ 0.182, 0.804, 0.352, 0.818 ], "angle": 0, "content": null, "poly": [ 301, 1880, 582, 1880, 582, 1913, 301, 1913 ] }, { "type": "code", "bbox": [ 0.18, 0.823, 0.748, 0.856 ], "angle": 0, "content": "asmlinkage long sys_gettimeofday(struct timeval __user *tv, structtimezone __user *tz)" }, { "type": "text", "bbox": [ 0.183, 0.861, 0.353, 0.875 ], "angle": 0, "content": null, "poly": [ 302, 2013, 583, 2013, 583, 2046, 302, 2046 ] }, { "type": "code", "bbox": [ 0.163, 0.88, 0.845, 0.914 ], "angle": 0, "content": "```c\nstruct task_struct FASTCALL * __switch_to(struct task_struct *prev_p, struct task_struct *next_p)" } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "title", "bbox": [ 0.146, 0.091, 0.197, 0.105 ], "angle": 0, "content": null, "poly": [ 241, 212, 325, 212, 325, 245, 241, 245 ] }, { "type": "text", "bbox": [ 0.146, 0.126, 0.848, 0.16 ], "angle": 0, "content": null, "poly": [ 241, 294, 1402, 294, 1402, 374, 241, 374 ] }, { "type": "text", "bbox": [ 0.18, 0.164, 0.848, 0.179 ], "angle": 0, "content": null, "poly": [ 297, 383, 1402, 383, 1402, 418, 297, 418 ] }, { "type": "title", "bbox": [ 0.146, 0.202, 0.295, 0.216 ], "angle": 0, "content": null, "poly": [ 241, 472, 487, 472, 487, 505, 241, 505 ] }, { "type": "text", "bbox": [ 0.145, 0.237, 0.848, 0.289 ], "angle": 0, "content": null, "poly": [ 239, 554, 1402, 554, 1402, 675, 239, 675 ] }, { "type": "title", "bbox": [ 0.146, 0.313, 0.312, 0.327 ], "angle": 0, "content": null, "poly": [ 241, 732, 516, 732, 516, 764, 241, 764 ] }, { "type": "text", "bbox": [ 0.146, 0.348, 0.848, 0.401 ], "angle": 0, "content": null, "poly": [ 241, 813, 1402, 813, 1402, 937, 241, 937 ] }, { "type": "text", "bbox": [ 0.146, 0.404, 0.848, 0.438 ], "angle": 0, "content": null, "poly": [ 241, 944, 1402, 944, 1402, 1024, 241, 1024 ] }, { "type": "title", "bbox": [ 0.146, 0.461, 0.24, 0.476 ], "angle": 0, "content": null, "poly": [ 241, 1078, 396, 1078, 396, 1113, 241, 1113 ] }, { "type": "text", "bbox": [ 0.145, 0.496, 0.848, 0.549 ], "angle": 0, "content": null, "poly": [ 239, 1160, 1402, 1160, 1402, 1284, 239, 1284 ] }, { "type": "text", "bbox": [ 0.182, 0.556, 0.512, 0.571 ], "angle": 0, "content": null, "poly": [ 301, 1300, 846, 1300, 846, 1335, 301, 1335 ] }, { "type": "text", "bbox": [ 0.146, 0.574, 0.848, 0.607 ], "angle": 0, "content": null, "poly": [ 241, 1342, 1402, 1342, 1402, 1419, 241, 1419 ] }, { "type": "text", "bbox": [ 0.19, 0.613, 0.356, 0.627 ], "angle": 0, "content": null, "poly": [ 314, 1433, 588, 1433, 588, 1466, 314, 1466 ] }, { "type": "text", "bbox": [ 0.19, 0.631, 0.758, 0.646 ], "angle": 0, "content": null, "poly": [ 314, 1475, 1253, 1475, 1253, 1510, 314, 1510 ] }, { "type": "text", "bbox": [ 0.191, 0.65, 0.662, 0.664 ], "angle": 0, "content": null, "poly": [ 315, 1520, 1094, 1520, 1094, 1553, 315, 1553 ] }, { "type": "text", "bbox": [ 0.146, 0.668, 0.848, 0.703 ], "angle": 0, "content": null, "poly": [ 241, 1562, 1402, 1562, 1402, 1644, 241, 1644 ] }, { "type": "title", "bbox": [ 0.146, 0.725, 0.401, 0.74 ], "angle": 0, "content": null, "poly": [ 241, 1695, 663, 1695, 663, 1730, 241, 1730 ] }, { "type": "text", "bbox": [ 0.145, 0.763, 0.848, 0.82 ], "angle": 0, "content": null, "poly": [ 239, 1784, 1402, 1784, 1402, 1917, 239, 1917 ] }, { "type": "text", "bbox": [ 0.182, 0.826, 0.399, 0.841 ], "angle": 0, "content": null, "poly": [ 301, 1932, 659, 1932, 659, 1967, 301, 1967 ] }, { "type": "text", "bbox": [ 0.18, 0.847, 0.59, 0.862 ], "angle": 0, "content": null, "poly": [ 297, 1981, 975, 1981, 975, 2016, 297, 2016 ] }, { "type": "text", "bbox": [ 0.18, 0.868, 0.625, 0.883 ], "angle": 0, 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0, "content": null }, { "type": "title", "bbox": [ 0.234, 0.355, 0.778, 0.38 ], "angle": 0, "content": null, "poly": [ 387, 830, 1286, 830, 1286, 888, 387, 888 ] }, { "type": "title", "bbox": [ 0.193, 0.411, 0.471, 0.43 ], "angle": 0, "content": null, "poly": [ 319, 961, 779, 961, 779, 1005, 319, 1005 ] }, { "type": "title", "bbox": [ 0.193, 0.466, 0.31, 0.481 ], "angle": 0, "content": null, "poly": [ 319, 1089, 512, 1089, 512, 1125, 319, 1125 ] }, { "type": "text", "bbox": [ 0.146, 0.498, 0.848, 0.534 ], "angle": 0, "content": null, "poly": [ 241, 1164, 1402, 1164, 1402, 1249, 241, 1249 ] }, { "type": "text", "bbox": [ 0.146, 0.541, 0.842, 0.577 ], "angle": 0, "content": null, "poly": [ 241, 1265, 1392, 1265, 1392, 1349, 241, 1349 ] }, { "type": "title", "bbox": [ 0.191, 0.589, 0.31, 0.604 ], "angle": 0, "content": null, "poly": [ 315, 1377, 512, 1377, 512, 1412, 315, 1412 ] }, { "type": "text", "bbox": [ 0.146, 0.621, 0.848, 0.657 ], "angle": 0, "content": null, "poly": [ 241, 1452, 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系统调用号32 位/64 位/common系统调用名称服务例程入口
0commonreadsys_read
1commonwritesys_write
2commonopensys_open
3commonclosesys_close
57commonforkstub_fork
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"content": "root@ubuntu:/usr/src/linux-source-4.4.0# make menuconfig \nHOSTCC scripts/basic/fixdep \nHOSTCC scripts/kconfig/mconf.o \nIn file included from scripts/kconfig/mconf.c:23:0: \nscripts/kconfig/lxdialog/dialog.h:38:20: fatal error: curses.h: No such file or directory \ncompilation terminated. \nscripts/Makefile.host:108: recipe for target 'scripts/kconfig/mconf.o' failed \nmake[1]: *** [scripts/kconfig/mconf.o] Error 1 \nMakefile:541: recipe for target 'menuconfig' failed \nmake: *** [menuconfig] Error 2" }, { "type": "image_caption", "bbox": [ 0.182, 0.291, 0.468, 0.305 ], "angle": 0, "content": null, "poly": [ 301, 680, 774, 680, 774, 713, 301, 713 ] }, { "type": "text", "bbox": [ 0.181, 0.309, 0.798, 0.325 ], "angle": 0, "content": null, "poly": [ 299, 722, 1319, 722, 1319, 760, 299, 760 ] }, { "type": "code", "bbox": [ 0.182, 0.329, 0.415, 0.343 ], "angle": 0, "content": "apt-get install libncurses5-dev" }, { "type": "text", "bbox": [ 0.145, 0.346, 0.848, 0.435 ], 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scripts/checksyscalts.sh \nHOSTCC scripts/sign-file \nscripts/sign-file.c:23:30: fatal error:openssl/opensslv.h: No such file or direc tory" }, { "type": "image_caption", "bbox": [ 0.315, 0.847, 0.444, 0.861 ], "angle": 0, "content": null, "poly": [ 521, 1981, 734, 1981, 734, 2013, 521, 2013 ] }, { "type": "text", "bbox": [ 0.181, 0.865, 0.585, 0.88 ], "angle": 0, "content": null, "poly": [ 299, 2023, 967, 2023, 967, 2058, 299, 2058 ] }, { "type": "text", "bbox": [ 0.182, 0.884, 0.457, 0.899 ], "angle": 0, "content": null, "poly": [ 301, 2067, 755, 2067, 755, 2102, 301, 2102 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.064 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 149, 620, 149 ] }, { "type": "text", "bbox": [ 0.146, 0.091, 0.845, 0.128 ], "angle": 0, "content": null, "poly": [ 241, 212, 1397, 212, 1397, 299, 241, 299 ] }, { "type": "title", "bbox": [ 0.191, 0.139, 0.31, 0.155 ], "angle": 0, "content": null, "poly": [ 315, 325, 512, 325, 512, 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"poly": [ 312, 290, 717, 290, 717, 325, 312, 325 ] }, { "type": "code", "bbox": [ 0.182, 0.143, 0.52, 0.455 ], "angle": 0, "content": "1 #include \n2 #include \n3 #include \n4 \n5 static int hello_init(void) \n6 { \n7 \\(\\mathrm{printk}(\\mathrm{KERN\\_ALERT}\"hello,\\mathrm{world}\\backslash \\mathrm{n\"});\\) \n8 return 0; \n9 } \n10 static void hello_exit(void) \n11 { \n12 \\(\\mathrm{printk}(\\mathrm{KERN\\_ALERT}\"goodbye\\backslash n\")\\) \n13 } \n14 \n15 module_init(hello_init); \n16 module_exit(hello_exit); \n17 MODULE licenses(\"GPL\");" }, { "type": "text", "bbox": [ 0.146, 0.476, 0.85, 0.528 ], "angle": 0, "content": null, "poly": [ 241, 1113, 1405, 1113, 1405, 1234, 241, 1234 ] }, { "type": "title", "bbox": [ 0.19, 0.532, 0.344, 0.546 ], "angle": 0, "content": null, "poly": [ 314, 1244, 568, 1244, 568, 1277, 314, 1277 ] }, { "type": "text", "bbox": [ 0.146, 0.55, 0.85, 0.603 ], "angle": 0, "content": null, "poly": [ 241, 1286, 1405, 1286, 1405, 1410, 241, 1410 ] }, { "type": "title", "bbox": [ 0.19, 0.606, 0.361, 0.62 ], "angle": 0, "content": null, "poly": [ 314, 1417, 597, 1417, 597, 1450, 314, 1450 ] }, { "type": "text", "bbox": [ 0.145, 0.624, 0.854, 0.751 ], "angle": 0, "content": null, "poly": [ 239, 1459, 1412, 1459, 1412, 1756, 239, 1756 ] }, { "type": "title", "bbox": [ 0.19, 0.754, 0.449, 0.769 ], "angle": 0, "content": null, "poly": [ 314, 1763, 742, 1763, 742, 1798, 314, 1798 ] }, { "type": "text", "bbox": [ 0.145, 0.772, 0.851, 0.899 ], "angle": 0, "content": null, "poly": [ 239, 1805, 1407, 1805, 1407, 2102, 239, 2102 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "code", "bbox": [ 0.182, 0.086, 0.371, 0.196 ], "angle": 0, "content": "初始化函数通常定义为： \nstatic int __init init_func(v{ //初始化代码} module_init(init_func);" }, { "type": "text", "bbox": [ 0.146, 0.198, 0.85, 0.25 ], "angle": 0, "content": null, "poly": [ 241, 463, 1405, 463, 1405, 584, 241, 584 ] }, { "type": "code", "bbox": [ 0.182, 0.253, 0.361, 0.362 ], "angle": 0, "content": "清理函数通常定义为： \nstatic void __exit exit_fu{//清理代码} \nmodule_exitexit_func);" }, { "type": "text", "bbox": [ 0.146, 0.365, 0.848, 0.399 ], "angle": 0, "content": null, "poly": [ 241, 853, 1402, 853, 1402, 933, 241, 933 ] }, { "type": "text", "bbox": [ 0.182, 0.402, 0.672, 0.417 ], "angle": 0, "content": null, "poly": [ 301, 940, 1111, 940, 1111, 975, 301, 975 ] }, { "type": "title", "bbox": [ 0.19, 0.421, 0.378, 0.436 ], "angle": 0, "content": null, "poly": [ 314, 984, 625, 984, 625, 1019, 314, 1019 ] }, { "type": "text", "bbox": [ 0.146, 0.439, 0.85, 0.491 ], "angle": 0, "content": null, "poly": [ 241, 1026, 1405, 1026, 1405, 1148, 241, 1148 ] }, { "type": "text", "bbox": [ 0.181, 0.495, 0.759, 0.51 ], "angle": 0, "content": null, "poly": [ 299, 1157, 1255, 1157, 1255, 1192, 299, 1192 ] }, { "type": "text", "bbox": [ 0.182, 0.513, 0.411, 0.528 ], "angle": 0, "content": 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头文件:#include<linux/init.h>#include<linux/module.h必选
许可声明MODULE_LICENSE("Dual BSD/GPL")必选
加载函数static int __init hello_init(void)必选
卸载函数static void __exit hello_exit(void)必选
模块参数moduleparam(name,type,perm)可选
模块导出符号EXPORT_SYMBOL(符号名)可选
模块作者等信息MODULE_AUTHOR("作者名")可选
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243, 542 ] }, { "type": "text", "bbox": [ 0.147, 0.235, 0.527, 0.251 ], "angle": 0, "content": null, "poly": [ 243, 549, 871, 549, 871, 587, 243, 587 ] }, { "type": "text", "bbox": [ 0.148, 0.255, 0.243, 0.269 ], "angle": 0, "content": null, "poly": [ 244, 596, 401, 596, 401, 629, 244, 629 ] }, { "type": "text", "bbox": [ 0.147, 0.272, 0.847, 0.288 ], "angle": 0, "content": null, "poly": [ 243, 636, 1400, 636, 1400, 673, 243, 673 ] }, { "type": "text", "bbox": [ 0.148, 0.292, 0.23, 0.305 ], "angle": 0, "content": null, "poly": [ 244, 682, 380, 682, 380, 713, 244, 713 ] }, { "type": "text", "bbox": [ 0.148, 0.31, 0.463, 0.324 ], "angle": 0, "content": null, "poly": [ 244, 725, 765, 725, 765, 757, 244, 757 ] }, { "type": "list", "bbox": [ 0.146, 0.198, 0.847, 0.324 ], "angle": 0, "content": null }, { "type": "text", "bbox": [ 0.146, 0.327, 0.85, 0.362 ], "angle": 0, "content": null, "poly": [ 241, 764, 1405, 764, 1405, 846, 241, 846 ] }, { "type": "text", "bbox": [ 0.182, 0.365, 0.821, 0.38 ], "angle": 0, "content": null, "poly": [ 301, 853, 1357, 853, 1357, 888, 301, 888 ] }, { "type": "title", "bbox": [ 0.181, 0.393, 0.562, 0.408 ], "angle": 0, "content": null, "poly": [ 299, 919, 929, 919, 929, 954, 299, 954 ] }, { "type": "text", "bbox": [ 0.182, 0.42, 0.848, 0.436 ], "angle": 0, "content": null, "poly": [ 301, 982, 1402, 982, 1402, 1019, 301, 1019 ] }, { "type": "code", "bbox": [ 0.182, 0.44, 0.655, 0.549 ], "angle": 0, "content": "hello1print.c: \n#include \n#include \n#include \nMODULE_LICENSE(\"GPL\"); \nvoid hello2print(void); //来源于第二个.c文件：hello2print.c" }, { "type": "code", "bbox": [ 0.182, 0.568, 0.486, 0.901 ], "angle": 0, "content": "static int __init hello_init(void) \n{ printf(KERN_ALERT\"hello,world\\n\"); hello2print(); return 0; \n} \nstatic void _exit hello_exit(void) \n{ printf(KERN_ALERT\"goodbye\\n\"); \n} \nmodule_init(hello_init); module_exit(hello_exit); \nhello2print.c \n#include \"linux/kernel.h\" \nvoid hello2print(void)" } ], [ { "type": 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null, "poly": [ 301, 1047, 537, 1047, 537, 1082, 301, 1082 ] }, { "type": "text", "bbox": [ 0.182, 0.476, 0.599, 0.491 ], "angle": 0, "content": null, "poly": [ 301, 1113, 990, 1113, 990, 1148, 301, 1148 ] }, { "type": "text", "bbox": [ 0.188, 0.495, 0.402, 0.509 ], "angle": 0, "content": null, "poly": [ 310, 1157, 664, 1157, 664, 1190, 310, 1190 ] }, { "type": "text", "bbox": [ 0.183, 0.513, 0.324, 0.527 ], "angle": 0, "content": null, "poly": [ 302, 1199, 535, 1199, 535, 1232, 302, 1232 ] }, { "type": "text", "bbox": [ 0.146, 0.532, 0.848, 0.565 ], "angle": 0, "content": null, "poly": [ 241, 1244, 1402, 1244, 1402, 1321, 241, 1321 ] }, { "type": "text", "bbox": [ 0.188, 0.569, 0.518, 0.583 ], "angle": 0, "content": null, "poly": [ 310, 1330, 856, 1330, 856, 1363, 310, 1363 ] }, { "type": "text", "bbox": [ 0.146, 0.587, 0.848, 0.621 ], "angle": 0, "content": null, "poly": [ 241, 1372, 1402, 1372, 1402, 1452, 241, 1452 ] }, { "type": "text", "bbox": [ 0.182, 0.625, 0.472, 0.64 ], "angle": 0, "content": null, "poly": [ 301, 1461, 780, 1461, 780, 1496, 301, 1496 ] }, { "type": "text", "bbox": [ 0.146, 0.643, 0.848, 0.676 ], "angle": 0, "content": null, "poly": [ 241, 1503, 1402, 1503, 1402, 1581, 241, 1581 ] }, { "type": "text", "bbox": [ 0.181, 0.681, 0.709, 0.695 ], "angle": 0, "content": null, "poly": [ 299, 1592, 1172, 1592, 1172, 1625, 299, 1625 ] }, { "type": "text", "bbox": [ 0.182, 0.699, 0.561, 0.713 ], "angle": 0, "content": null, "poly": [ 301, 1634, 927, 1634, 927, 1667, 301, 1667 ] }, { "type": "text", "bbox": [ 0.19, 0.717, 0.4, 0.731 ], "angle": 0, "content": null, "poly": [ 314, 1677, 661, 1677, 661, 1709, 314, 1709 ] }, { "type": "text", "bbox": [ 0.202, 0.735, 0.848, 0.768 ], "angle": 0, "content": null, "poly": [ 334, 1719, 1402, 1719, 1402, 1796, 334, 1796 ] }, { "type": "text", "bbox": [ 0.181, 0.772, 0.729, 0.787 ], "angle": 0, "content": null, "poly": [ 299, 1805, 1205, 1805, 1205, 1840, 299, 1840 ] }, { "type": "text", "bbox": [ 0.19, 0.792, 0.417, 0.806 ], "angle": 0, "content": null, "poly": [ 314, 1852, 689, 1852, 689, 1885, 314, 1885 ] }, { "type": "text", "bbox": [ 0.182, 0.81, 0.493, 0.824 ], "angle": 0, "content": null, "poly": [ 301, 1894, 815, 1894, 815, 1927, 301, 1927 ] }, { "type": "text", "bbox": [ 0.182, 0.828, 0.314, 0.842 ], "angle": 0, "content": null, "poly": [ 301, 1936, 519, 1936, 519, 1969, 301, 1969 ] }, { "type": "title", "bbox": [ 0.182, 0.856, 0.353, 0.87 ], "angle": 0, "content": null, "poly": [ 301, 2002, 583, 2002, 583, 2034, 301, 2034 ] }, { "type": "text", "bbox": [ 0.181, 0.883, 0.848, 0.898 ], "angle": 0, "content": null, "poly": [ 299, 2065, 1402, 2065, 1402, 2100, 299, 2100 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "text", "bbox": [ 0.146, 0.086, 0.495, 0.102 ], "angle": 0, "content": null, "poly": [ 241, 201, 818, 201, 818, 238, 241, 238 ] }, { "type": "text", "bbox": [ 0.19, 0.106, 0.308, 0.12 ], "angle": 0, "content": null, "poly": [ 314, 247, 509, 247, 509, 280, 314, 280 ] }, { "type": "text", "bbox": [ 0.182, 0.124, 0.714, 0.139 ], "angle": 0, "content": null, "poly": [ 301, 290, 1180, 290, 1180, 325, 301, 325 ] }, { "type": "text", "bbox": [ 0.19, 0.143, 0.39, 0.159 ], "angle": 0, "content": null, "poly": [ 314, 334, 645, 334, 645, 371, 314, 371 ] }, { "type": "text", "bbox": [ 0.146, 0.161, 0.856, 0.195 ], "angle": 0, "content": null, "poly": [ 241, 376, 1415, 376, 1415, 456, 241, 456 ] }, { "type": "text", "bbox": [ 0.182, 0.198, 0.41, 0.212 ], "angle": 0, "content": null, "poly": [ 301, 463, 678, 463, 678, 495, 301, 495 ] }, { "type": "text", "bbox": [ 0.234, 0.217, 0.445, 0.232 ], "angle": 0, "content": null, "poly": [ 387, 507, 736, 507, 736, 542, 387, 542 ] }, { "type": "text", "bbox": [ 0.235, 0.235, 0.451, 0.25 ], "angle": 0, "content": null, "poly": [ 388, 549, 745, 549, 745, 584, 388, 584 ] }, { "type": "text", "bbox": [ 0.182, 0.253, 0.512, 0.269 ], "angle": 0, "content": null, "poly": [ 301, 591, 846, 591, 846, 629, 301, 629 ] }, { "type": "text", "bbox": [ 0.146, 0.272, 0.856, 0.324 ], "angle": 0, "content": null, "poly": [ 241, 636, 1415, 636, 1415, 757, 241, 757 ] }, { "type": "text", "bbox": [ 0.146, 0.327, 0.85, 0.362 ], "angle": 0, "content": null, "poly": [ 241, 764, 1405, 764, 1405, 846, 241, 846 ] }, { "type": "code", "bbox": [ 0.212, 0.366, 0.535, 0.381 ], "angle": 0, "content": "insmod module_parako who \\(\\equiv\\) zwh times \\(= 4\\)" }, { "type": "text", "bbox": [ 0.205, 0.402, 0.286, 0.417 ], "angle": 0, "content": null, "poly": [ 339, 940, 473, 940, 473, 975, 339, 975 ] }, { "type": "text", "bbox": [ 0.206, 0.422, 0.378, 0.435 ], "angle": 0, "content": null, "poly": [ 340, 987, 625, 987, 625, 1017, 340, 1017 ] }, { "type": "text", "bbox": [ 0.206, 0.44, 0.41, 0.453 ], "angle": 0, "content": null, "poly": [ 340, 1029, 678, 1029, 678, 1059, 340, 1059 ] }, { "type": "text", "bbox": [ 0.206, 0.459, 0.4, 0.471 ], "angle": 0, "content": null, "poly": [ 340, 1073, 661, 1073, 661, 1101, 340, 1101 ] }, { "type": "text", "bbox": [ 0.206, 0.477, 0.46, 0.491 ], "angle": 0, "content": null, "poly": [ 340, 1115, 760, 1115, 760, 1148, 340, 1148 ] }, { "type": "text", "bbox": [ 0.206, 0.496, 0.411, 0.51 ], "angle": 0, "content": null, "poly": [ 340, 1160, 679, 1160, 679, 1192, 340, 1192 ] }, { "type": "text", "bbox": [ 0.206, 0.514, 0.454, 0.527 ], "angle": 0, "content": null, "poly": [ 340, 1202, 750, 1202, 750, 1232, 340, 1232 ] }, { "type": "text", "bbox": [ 0.206, 0.533, 0.345, 0.546 ], "angle": 0, "content": null, "poly": [ 340, 1246, 570, 1246, 570, 1277, 340, 1277 ] }, { "type": "text", "bbox": [ 0.206, 0.551, 0.563, 0.566 ], "angle": 0, "content": null, "poly": [ 340, 1288, 931, 1288, 931, 1323, 340, 1323 ] }, { "type": "text", "bbox": [ 0.206, 0.57, 0.451, 0.584 ], "angle": 0, "content": null, "poly": [ 340, 1333, 745, 1333, 745, 1365, 340, 1365 ] }, { "type": "text", "bbox": [ 0.206, 0.588, 0.475, 0.603 ], "angle": 0, "content": null, "poly": [ 340, 1375, 785, 1375, 785, 1410, 340, 1410 ] }, { "type": "text", "bbox": [ 0.206, 0.607, 0.264, 0.62 ], "angle": 0, "content": null, "poly": [ 340, 1419, 436, 1419, 436, 1450, 340, 1450 ] }, { "type": "text", "bbox": [ 0.206, 0.626, 0.325, 0.638 ], "angle": 0, "content": null, "poly": [ 340, 1464, 537, 1464, 537, 1492, 340, 1492 ] }, { "type": "text", "bbox": [ 0.206, 0.644, 0.454, 0.658 ], "angle": 0, "content": null, "poly": [ 340, 1506, 750, 1506, 750, 1539, 340, 1539 ] }, { "type": "text", "bbox": [ 0.206, 0.662, 0.49, 0.677 ], "angle": 0, "content": null, "poly": [ 340, 1548, 810, 1548, 810, 1583, 340, 1583 ] }, { "type": "text", "bbox": [ 0.206, 0.682, 0.356, 0.694 ], "angle": 0, "content": null, "poly": [ 340, 1595, 588, 1595, 588, 1623, 340, 1623 ] }, { "type": "text", "bbox": [ 0.206, 0.699, 0.264, 0.713 ], "angle": 0, "content": null, "poly": [ 340, 1634, 436, 1634, 436, 1667, 340, 1667 ] }, { "type": "text", "bbox": [ 0.206, 0.718, 0.493, 0.732 ], "angle": 0, "content": null, "poly": [ 340, 1679, 815, 1679, 815, 1712, 340, 1712 ] }, { "type": "text", "bbox": [ 0.206, 0.737, 0.264, 0.75 ], "angle": 0, "content": null, "poly": [ 340, 1723, 436, 1723, 436, 1754, 340, 1754 ] }, { "type": "text", "bbox": [ 0.206, 0.755, 0.51, 0.77 ], "angle": 0, "content": null, "poly": [ 340, 1765, 843, 1765, 843, 1801, 340, 1801 ] }, { "type": "text", "bbox": [ 0.206, 0.774, 0.264, 0.787 ], "angle": 0, "content": null, "poly": [ 340, 1810, 436, 1810, 436, 1840, 340, 1840 ] }, { "type": "text", "bbox": [ 0.206, 0.793, 0.427, 0.807 ], "angle": 0, "content": null, "poly": [ 340, 1854, 706, 1854, 706, 1887, 340, 1887 ] }, { "type": "text", "bbox": [ 0.206, 0.811, 0.433, 0.825 ], "angle": 0, "content": null, "poly": [ 340, 1896, 716, 1896, 716, 1929, 340, 1929 ] }, { "type": "list", "bbox": [ 0.206, 0.422, 0.563, 0.825 ], "angle": 0, "content": null }, { "type": "title", "bbox": [ 0.194, 0.87, 0.341, 0.89 ], "angle": 0, "content": null, "poly": [ 320, 2034, 564, 2034, 564, 2081, 320, 2081 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.064 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 149, 620, 149 ] }, { "type": "title", "bbox": [ 0.19, 0.095, 0.496, 0.112 ], "angle": 0, "content": null, "poly": [ 314, 222, 820, 222, 820, 261, 314, 261 ] }, { "type": "text", "bbox": [ 0.145, 0.124, 0.85, 0.178 ], "angle": 0, "content": null, "poly": [ 239, 290, 1405, 290, 1405, 416, 239, 416 ] }, { "type": "title", "bbox": [ 0.181, 0.189, 0.314, 0.204 ], "angle": 0, "content": null, "poly": [ 299, 442, 519, 442, 519, 477, 299, 477 ] }, { "type": "code", "bbox": [ 0.18, 0.217, 0.432, 0.288 ], "angle": 0, "content": "Linux中链表的定义为： \nstruct list_head{structlist_head \\*next,\\*prev;1" }, { "type": "text", "bbox": [ 0.163, 0.29, 0.829, 0.325 ], "angle": 0, "content": null, "poly": [ 269, 678, 1371, 678, 1371, 760, 269, 760 ] }, { "type": "code", "bbox": [ 0.18, 0.328, 0.365, 0.399 ], "angle": 0, "content": "```c\nstruct numlist {\n int num;\n struct list_head list;\n};" }, { "type": "title", "bbox": [ 0.18, 0.411, 0.306, 0.427 ], "angle": 0, "content": null, "poly": [ 297, 961, 506, 961, 506, 998, 297, 998 ] }, { "type": "title", "bbox": [ 0.19, 0.439, 0.482, 0.455 ], "angle": 0, "content": null, "poly": [ 314, 1026, 797, 1026, 797, 1064, 314, 1064 ] }, { "type": "text", "bbox": [ 0.163, 0.457, 0.84, 0.51 ], "angle": 0, "content": null, "poly": [ 269, 1068, 1389, 1068, 1389, 1192, 269, 1192 ] }, { "type": "text", "bbox": [ 0.197, 0.513, 0.426, 0.528 ], "angle": 0, "content": null, "poly": [ 325, 1199, 704, 1199, 704, 1234, 325, 1234 ] }, { "type": "code", "bbox": [ 0.197, 0.532, 0.617, 0.64 ], "angle": 0, "content": "/* list_for_each - iterate over a list\n* @pos: the &struct list_head to use as a loop cursor.\n* @head: the head for your list.\n*/\n#define list_for_each(pos, head) \\\nfor (pos = (head) -> next; pos != (head); pos = pos->next)" }, { "type": "text", "bbox": [ 0.198, 0.642, 0.748, 0.659 ], "angle": 0, "content": null, "poly": [ 327, 1501, 1237, 1501, 1237, 1541, 327, 1541 ] }, { "type": "image", "bbox": [ 0.207, 0.665, 0.441, 0.774 ], "angle": 0, "content": null }, { "type": "image_caption", "bbox": [ 0.241, 0.787, 0.422, 0.801 ], "angle": 0, "content": null, "poly": [ 398, 1840, 697, 1840, 697, 1873, 398, 1873 ] }, { "type": "image", "bbox": [ 0.522, 0.667, 0.726, 0.774 ], "angle": 0, "content": null }, { "type": "image_caption", "bbox": [ 0.551, 0.786, 0.71, 0.801 ], "angle": 0, "content": null, "poly": [ 911, 1838, 1174, 1838, 1174, 1873, 911, 1873 ] }, { "type": "text", "bbox": [ 0.163, 0.81, 0.85, 0.844 ], "angle": 0, "content": null, "poly": [ 269, 1894, 1405, 1894, 1405, 1974, 269, 1974 ] }, { "type": "text", "bbox": [ 0.197, 0.847, 0.498, 0.863 ], "angle": 0, "content": null, "poly": [ 325, 1981, 823, 1981, 823, 2018, 325, 2018 ] }, { "type": "text", "bbox": [ 0.207, 0.866, 0.503, 0.881 ], "angle": 0, "content": null, "poly": [ 342, 2025, 831, 2025, 831, 2060, 342, 2060 ] }, { "type": "text", "bbox": [ 0.207, 0.884, 0.593, 0.899 ], "angle": 0, "content": null, "poly": [ 342, 2067, 980, 2067, 980, 2102, 342, 2102 ] }, { "type": "list", "bbox": [ 0.207, 0.866, 0.593, 0.899 ], "angle": 0, "content": null } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "text", "bbox": [ 0.196, 0.087, 0.642, 0.103 ], "angle": 0, "content": null, "poly": [ 324, 203, 1061, 203, 1061, 240, 324, 240 ] }, { "type": "text", "bbox": [ 0.207, 0.106, 0.23, 0.12 ], "angle": 0, "content": null, "poly": [ 342, 247, 380, 247, 380, 280, 342, 280 ] }, { "type": "text", "bbox": [ 0.199, 0.125, 0.482, 0.159 ], "angle": 0, "content": null, "poly": [ 329, 292, 797, 292, 797, 371, 329, 371 ] }, { "type": "text", "bbox": [ 0.198, 0.161, 0.751, 0.177 ], "angle": 0, "content": null, "poly": [ 327, 376, 1242, 376, 1242, 414, 327, 414 ] }, { "type": "code", "bbox": [ 0.199, 0.18, 0.613, 0.233 ], "angle": 0, "content": "define container_of(ptr, type, member) {{const typeof((type*)0)->member)\\*mptr = (ptr);\\( (type\\*)(char\\)_mptr - offsetof(type,member));}}" }, { "type": "text", "bbox": [ 0.163, 0.235, 0.85, 0.288 ], "angle": 0, "content": null, "poly": [ 269, 549, 1405, 549, 1405, 673, 269, 673 ] }, { "type": "text", "bbox": [ 0.199, 0.291, 0.405, 0.306 ], "angle": 0, "content": null, "poly": [ 329, 680, 669, 680, 669, 715, 329, 715 ] }, { "type": "code", "bbox": [ 0.198, 0.31, 0.4, 0.38 ], "angle": 0, "content": "```c\nstruct numlist {\n int num;\n struct list_head list;\n};" }, { "type": "text", "bbox": [ 0.199, 0.384, 0.475, 0.398 ], "angle": 0, "content": null, "poly": [ 329, 898, 785, 898, 785, 930, 329, 930 ] }, { "type": "code", "bbox": [ 0.198, 0.402, 0.599, 0.528 ], "angle": 0, "content": "```c\nstruct numlist numhead //链表头节点\nstruct list_head *pos;\nstruct numlist *p;\nlist_for_each(pos, &numhead.list) {\n p=list_entry(pos, struct numlist, list);\n //下面可以对p指向的numlist节点进行相关操作\n}" }, { "type": "text", "bbox": [ 0.192, 0.532, 0.404, 0.565 ], "angle": 0, "content": null, "poly": [ 317, 1244, 668, 1244, 668, 1321, 317, 1321 ] }, { "type": "text", "bbox": [ 0.208, 0.569, 0.655, 0.585 ], "angle": 0, "content": null, "poly": [ 344, 1330, 1083, 1330, 1083, 1368, 344, 1368 ] }, { "type": "text", "bbox": [ 0.209, 0.588, 0.582, 0.603 ], "angle": 0, "content": null, "poly": [ 345, 1375, 962, 1375, 962, 1410, 345, 1410 ] }, { "type": "text", "bbox": [ 0.209, 0.606, 0.496, 0.621 ], "angle": 0, "content": null, "poly": [ 345, 1417, 820, 1417, 820, 1452, 345, 1452 ] }, { "type": "text", "bbox": [ 0.209, 0.625, 0.667, 0.64 ], "angle": 0, "content": null, "poly": [ 345, 1461, 1103, 1461, 1103, 1496, 345, 1496 ] }, { "type": "text", "bbox": [ 0.209, 0.644, 0.23, 0.657 ], "angle": 0, "content": null, "poly": [ 345, 1506, 380, 1506, 380, 1536, 345, 1536 ] }, { "type": "list", "bbox": [ 0.208, 0.569, 0.667, 0.657 ], "angle": 0, "content": null }, { "type": "code", "bbox": [ 0.199, 0.662, 0.796, 0.733 ], "angle": 0, "content": "define list_for_each_entry(pos, head, member) \nfor (pos = list_entry((head) -> next, sizeof(*pos), member); \n prefetch(pos -> member.next), &pos -> member != (head); \n pos = list_entry(pos -> member.next, sizeof(*pos), member))" }, { "type": "text", "bbox": [ 0.146, 0.735, 0.85, 0.787 ], "angle": 0, "content": null, "poly": [ 241, 1719, 1405, 1719, 1405, 1840, 241, 1840 ] }, { "type": "title", "bbox": [ 0.201, 0.8, 0.585, 0.816 ], "angle": 0, "content": null, "poly": [ 332, 1871, 967, 1871, 967, 1908, 332, 1908 ] }, { "type": "text", "bbox": [ 0.146, 0.828, 0.85, 0.862 ], "angle": 0, "content": null, "poly": [ 241, 1936, 1405, 1936, 1405, 2016, 241, 2016 ] }, { "type": "text", "bbox": [ 0.203, 0.866, 0.445, 0.88 ], "angle": 0, "content": null, "poly": [ 335, 2025, 736, 2025, 736, 2058, 335, 2058 ] }, { "type": "text", "bbox": [ 0.204, 0.884, 0.444, 0.899 ], "angle": 0, "content": null, "poly": [ 337, 2067, 734, 2067, 734, 2102, 337, 2102 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "code", "bbox": [ 0.196, 0.086, 0.768, 0.584 ], "angle": 0, "content": "define TASK_UNINTERRUPTIBLE 2\n#define _TASK_STOPPED 4\n#define _TASK tracerED 8\n/* in tsk->exit_state */\n#define EXITDead 16\n#define EXIT_ZOMBIE 32\n/* in tsk->state again */\n#define TASK_DEAD 64\n#define TASK_WAKEKILL 128\n#define TASK_WAKING 256\nstruct task_struct {\n volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */\n void *stack;\n int prio, static_prio, normal_prio;\n unsigned int policy;\n struct list_head tasks; /*线程组长链表，是节点*/\n struct mm_struct *mm, *active_mm;\n pid_t pid;\n pid_t tgid;\n struct task_struct __rcu *real_parent; /* real parent process */\n struct task_struct __rcu *parent; /* recipient of SIGCHLD, wait4() reports */\n struct list_head children; /* list of my children */\n struct list_head sibling; /* linkage in my parent's children list */\n cptime_t utime, stime, utimescaled, stimescaled;\n char comm[TASKCOMM_LEN]; /* executable name excluding path */\n};" }, { "type": "text", "bbox": [ 0.146, 0.587, 0.85, 0.695 ], "angle": 0, "content": null, "poly": [ 241, 1372, 1405, 1372, 1405, 1625, 241, 1625 ] }, { "type": "text", "bbox": [ 0.162, 0.698, 0.85, 0.75 ], "angle": 0, "content": null, "poly": [ 267, 1632, 1405, 1632, 1405, 1754, 267, 1754 ] }, { "type": "code", "bbox": [ 0.182, 0.754, 0.605, 0.789 ], "angle": 0, "content": "define for_each_process(p) \\ \nfor (p = &init_task; (p = next_task(p)) != &init_task; )" }, { "type": "text", "bbox": [ 0.198, 0.791, 0.637, 0.807 ], "angle": 0, "content": null, "poly": [ 327, 1850, 1053, 1850, 1053, 1887, 327, 1887 ] }, { "type": "text", "bbox": [ 0.163, 0.809, 0.851, 0.899 ], "angle": 0, "content": null, "poly": [ 269, 1892, 1407, 1892, 1407, 2102, 269, 2102 ] } ], [ { "type": "header", "bbox": [ 0.376, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 621, 116, 1027, 116, 1027, 147, 621, 147 ] }, { "type": "image", "bbox": [ 0.214, 0.085, 0.744, 0.234 ], "angle": 0, "content": null }, { "type": "image_caption", "bbox": [ 0.403, 0.248, 0.545, 0.262 ], "angle": 0, "content": null, "poly": [ 666, 580, 901, 580, 901, 612, 666, 612 ] }, { "type": "text", "bbox": [ 0.162, 0.272, 0.85, 0.326 ], "angle": 0, "content": null, "poly": [ 267, 636, 1405, 636, 1405, 762, 267, 762 ] }, { "type": "code", "bbox": [ 0.196, 0.347, 0.703, 0.751 ], "angle": 0, "content": "```cpp\nstruct task_struct *result = NULL;\nif (pid) {\n struct hlist_node *first;\n first = rcu_dereference_check(pid->tasks[type].first, rcu_read_lock_held() || lockdep_tasklist_lock_is_held());\n if (first)\n result = hlist_entry(first, struct task_struct, pid[(type).node);\n} return result;\n}\nstruct pid *find_vpid(int nr) {\n return find.pid_ns(nr, current->nsproxy->pid_ns);\n}\nstruct pid *find_get.pid(pid_t nr) {\n struct pid *pid;\n pid = get.pid找到了pid(nr));\n rcu_read_unlock();\n return pid;\n}" }, { "type": "title", "bbox": [ 0.279, 0.794, 0.735, 0.818 ], "angle": 0, "content": null, "poly": [ 461, 1857, 1215, 1857, 1215, 1913, 461, 1913 ] }, { "type": "title", "bbox": [ 0.193, 0.85, 0.472, 0.87 ], "angle": 0, "content": null, "poly": [ 319, 1988, 780, 1988, 780, 2034, 319, 2034 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.622, 0.064 ], "angle": 0, "content": null, "poly": [ 620, 116, 1028, 116, 1028, 149, 620, 149 ] }, { "type": "title", "bbox": [ 0.182, 0.096, 0.287, 0.111 ], "angle": 0, "content": null, "poly": [ 301, 224, 474, 224, 474, 259, 301, 259 ] }, { "type": "text", "bbox": [ 0.146, 0.124, 0.849, 0.195 ], "angle": 0, "content": null, "poly": [ 241, 290, 1404, 290, 1404, 456, 241, 456 ] }, { "type": "title", "bbox": [ 0.181, 0.207, 0.287, 0.223 ], "angle": 0, "content": null, "poly": [ 299, 484, 474, 484, 474, 521, 299, 521 ] }, { "type": "text", "bbox": [ 0.146, 0.235, 0.85, 0.287 ], "angle": 0, "content": null, "poly": [ 241, 549, 1405, 549, 1405, 671, 241, 671 ] }, { "type": "text", "bbox": [ 0.171, 0.291, 0.68, 0.306 ], "angle": 0, "content": null, "poly": [ 282, 680, 1124, 680, 1124, 715, 282, 715 ] }, { "type": "text", "bbox": [ 0.172, 0.31, 0.603, 0.324 ], "angle": 0, "content": null, "poly": [ 284, 725, 997, 725, 997, 757, 284, 757 ] }, { "type": "text", "bbox": [ 0.172, 0.328, 0.786, 0.343 ], "angle": 0, "content": null, "poly": [ 284, 767, 1300, 767, 1300, 802, 284, 802 ] }, { "type": "list", "bbox": [ 0.146, 0.235, 0.85, 0.343 ], "angle": 0, "content": null }, { "type": "title", "bbox": [ 0.181, 0.374, 0.382, 0.39 ], "angle": 0, "content": null, "poly": [ 299, 874, 631, 874, 631, 912, 299, 912 ] }, { "type": "title", "bbox": [ 0.181, 0.411, 0.294, 0.426 ], "angle": 0, "content": null, "poly": [ 299, 961, 486, 961, 486, 996, 299, 996 ] }, { "type": "text", "bbox": [ 0.217, 0.439, 0.521, 0.455 ], "angle": 0, "content": null, "poly": [ 358, 1026, 861, 1026, 861, 1064, 358, 1064 ] }, { "type": "title", "bbox": [ 0.174, 0.481, 0.449, 0.501 ], "angle": 0, "content": null, "poly": [ 287, 1125, 742, 1125, 742, 1171, 287, 1171 ] }, { "type": "title", "bbox": [ 0.191, 0.536, 0.402, 0.554 ], "angle": 0, "content": null, "poly": [ 315, 1253, 664, 1253, 664, 1295, 315, 1295 ] }, { "type": "text", "bbox": [ 0.146, 0.565, 0.848, 0.616 ], "angle": 0, "content": null, "poly": [ 241, 1321, 1402, 1321, 1402, 1440, 241, 1440 ] }, { "type": "text", "bbox": [ 0.181, 0.62, 0.848, 0.654 ], "angle": 0, "content": null, "poly": [ 299, 1450, 1402, 1450, 1402, 1529, 299, 1529 ] }, { "type": "text", "bbox": [ 0.181, 0.657, 0.848, 0.691 ], "angle": 0, "content": null, "poly": [ 299, 1536, 1402, 1536, 1402, 1616, 299, 1616 ] }, { "type": "text", "bbox": [ 0.182, 0.694, 0.632, 0.71 ], "angle": 0, "content": null, "poly": [ 301, 1623, 1045, 1623, 1045, 1660, 301, 1660 ] }, { "type": "list", "bbox": [ 0.181, 0.62, 0.848, 0.71 ], "angle": 0, "content": null }, { "type": "title", "bbox": [ 0.191, 0.722, 0.381, 0.739 ], "angle": 0, "content": null, "poly": [ 315, 1688, 630, 1688, 630, 1728, 315, 1728 ] }, { "type": "title", "bbox": [ 0.182, 0.759, 0.321, 0.775 ], "angle": 0, "content": null, "poly": [ 301, 1775, 530, 1775, 530, 1812, 301, 1812 ] }, { "type": "text", "bbox": [ 0.146, 0.787, 0.848, 0.821 ], "angle": 0, "content": null, "poly": [ 241, 1840, 1402, 1840, 1402, 1920, 241, 1920 ] }, { "type": "text", "bbox": [ 0.181, 0.825, 0.499, 0.839 ], "angle": 0, "content": null, "poly": [ 299, 1929, 825, 1929, 825, 1962, 299, 1962 ] }, { "type": "text", "bbox": [ 0.181, 0.843, 0.666, 0.858 ], "angle": 0, "content": null, "poly": [ 299, 1971, 1101, 1971, 1101, 2006, 299, 2006 ] }, { "type": "text", "bbox": [ 0.181, 0.861, 0.771, 0.876 ], "angle": 0, "content": null, "poly": [ 299, 2013, 1275, 2013, 1275, 2048, 299, 2048 ] }, { "type": "list", "bbox": [ 0.181, 0.825, 0.771, 0.876 ], "angle": 0, "content": null }, { "type": "text", "bbox": [ 0.182, 0.88, 0.496, 0.895 ], "angle": 0, "content": null, "poly": [ 301, 2058, 820, 2058, 820, 2093, 301, 2093 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.622, 0.064 ], "angle": 0, "content": null, "poly": [ 620, 116, 1028, 116, 1028, 149, 620, 149 ] }, { "type": "image", "bbox": [ 0.183, 0.085, 0.735, 0.14 ], "angle": 0, "content": null }, { "type": "text", "bbox": [ 0.146, 0.142, 0.837, 0.175 ], "angle": 0, "content": null, "poly": [ 241, 332, 1384, 332, 1384, 409, 241, 409 ] }, { "type": "text", "bbox": [ 0.146, 0.179, 0.85, 0.213 ], "angle": 0, "content": null, "poly": [ 241, 418, 1405, 418, 1405, 498, 241, 498 ] }, { "type": "text", "bbox": [ 0.18, 0.217, 0.415, 0.232 ], "angle": 0, "content": null, "poly": [ 297, 507, 686, 507, 686, 542, 297, 542 ] }, { "type": "text", "bbox": [ 0.182, 0.236, 0.445, 0.251 ], "angle": 0, "content": null, "poly": [ 301, 552, 736, 552, 736, 587, 301, 587 ] }, { "type": "title", "bbox": [ 0.181, 0.263, 0.406, 0.278 ], "angle": 0, "content": null, "poly": [ 299, 615, 671, 615, 671, 650, 299, 650 ] }, { "type": "text", "bbox": [ 0.189, 0.291, 0.597, 0.306 ], "angle": 0, "content": null, "poly": [ 312, 680, 987, 680, 987, 715, 312, 715 ] }, { "type": "text", "bbox": [ 0.217, 0.309, 0.848, 0.325 ], "angle": 0, "content": null, "poly": [ 358, 722, 1402, 722, 1402, 760, 358, 760 ] }, { "type": "text", "bbox": [ 0.219, 0.327, 0.848, 0.344 ], "angle": 0, "content": null, "poly": [ 362, 764, 1402, 764, 1402, 804, 362, 804 ] }, { "type": "text", "bbox": [ 0.219, 0.346, 0.848, 0.38 ], "angle": 0, "content": null, "poly": [ 362, 809, 1402, 809, 1402, 888, 362, 888 ] }, { "type": "list", "bbox": [ 0.217, 0.309, 0.848, 0.38 ], "angle": 0, "content": null }, { "type": "text", "bbox": [ 0.188, 0.383, 0.466, 0.398 ], "angle": 0, "content": null, "poly": [ 310, 895, 770, 895, 770, 930, 310, 930 ] }, { "type": "text", "bbox": [ 0.146, 0.401, 0.847, 0.455 ], "angle": 0, "content": null, "poly": [ 241, 937, 1400, 937, 1400, 1064, 241, 1064 ] }, { "type": "text", "bbox": [ 0.18, 0.459, 0.7, 0.473 ], "angle": 0, "content": null, "poly": [ 297, 1073, 1157, 1073, 1157, 1106, 297, 1106 ] }, { "type": "text", "bbox": [ 0.18, 0.476, 0.812, 0.491 ], "angle": 0, "content": null, "poly": [ 297, 1113, 1343, 1113, 1343, 1148, 297, 1148 ] }, { "type": "text", "bbox": [ 0.182, 0.495, 0.265, 0.509 ], "angle": 0, "content": null, "poly": [ 301, 1157, 438, 1157, 438, 1190, 301, 1190 ] }, { "type": "text", "bbox": [ 0.18, 0.513, 0.671, 0.529 ], "angle": 0, "content": null, "poly": [ 297, 1199, 1109, 1199, 1109, 1237, 297, 1237 ] }, { "type": "text", "bbox": [ 0.181, 0.532, 0.446, 0.547 ], "angle": 0, "content": null, "poly": [ 299, 1244, 737, 1244, 737, 1279, 299, 1279 ] }, { "type": "text", "bbox": [ 0.181, 0.551, 0.596, 0.566 ], "angle": 0, "content": null, "poly": [ 299, 1288, 985, 1288, 985, 1323, 299, 1323 ] }, { "type": "text", "bbox": [ 0.181, 0.569, 0.59, 0.583 ], "angle": 0, "content": null, "poly": [ 299, 1330, 975, 1330, 975, 1363, 299, 1363 ] }, { "type": "text", "bbox": [ 0.188, 0.587, 0.466, 0.602 ], "angle": 0, "content": null, "poly": [ 310, 1372, 770, 1372, 770, 1408, 310, 1408 ] }, { "type": "text", "bbox": [ 0.146, 0.606, 0.834, 0.639 ], "angle": 0, "content": null, "poly": [ 241, 1417, 1379, 1417, 1379, 1494, 241, 1494 ] }, { "type": "text", "bbox": [ 0.181, 0.643, 0.655, 0.658 ], "angle": 0, "content": null, "poly": [ 299, 1503, 1083, 1503, 1083, 1539, 299, 1539 ] }, { "type": "text", "bbox": [ 0.181, 0.662, 0.796, 0.677 ], "angle": 0, "content": null, "poly": [ 299, 1548, 1316, 1548, 1316, 1583, 299, 1583 ] }, { "type": "text", "bbox": [ 0.181, 0.68, 0.671, 0.695 ], "angle": 0, "content": null, "poly": [ 299, 1590, 1109, 1590, 1109, 1625, 299, 1625 ] }, { "type": "text", "bbox": [ 0.182, 0.699, 0.265, 0.713 ], "angle": 0, "content": null, "poly": [ 301, 1634, 438, 1634, 438, 1667, 301, 1667 ] }, { "type": "text", "bbox": [ 0.181, 0.717, 0.512, 0.732 ], "angle": 0, "content": null, "poly": [ 299, 1677, 846, 1677, 846, 1712, 299, 1712 ] }, { "type": "text", "bbox": [ 0.181, 0.736, 0.446, 0.75 ], "angle": 0, "content": null, "poly": [ 299, 1721, 737, 1721, 737, 1754, 299, 1754 ] }, { "type": "text", "bbox": [ 0.181, 0.754, 0.596, 0.769 ], "angle": 0, "content": null, "poly": [ 299, 1763, 985, 1763, 985, 1798, 299, 1798 ] }, { "type": "text", "bbox": [ 0.181, 0.773, 0.561, 0.787 ], "angle": 0, "content": null, "poly": [ 299, 1808, 927, 1808, 927, 1840, 299, 1840 ] }, { "type": "text", "bbox": [ 0.181, 0.791, 0.596, 0.806 ], "angle": 0, "content": null, "poly": [ 299, 1850, 985, 1850, 985, 1885, 299, 1885 ] }, { "type": "text", "bbox": [ 0.189, 0.81, 0.341, 0.825 ], "angle": 0, "content": null, "poly": [ 312, 1894, 564, 1894, 564, 1929, 312, 1929 ] }, { "type": "text", "bbox": [ 0.145, 0.828, 0.847, 0.881 ], "angle": 0, "content": null, "poly": [ 239, 1936, 1400, 1936, 1400, 2060, 239, 2060 ] }, { "type": "text", "bbox": [ 0.215, 0.884, 0.655, 0.9 ], "angle": 0, "content": null, "poly": [ 355, 2067, 1083, 2067, 1083, 2105, 355, 2105 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "text", "bbox": [ 0.181, 0.086, 0.467, 0.102 ], "angle": 0, "content": null, "poly": [ 299, 201, 772, 201, 772, 238, 299, 238 ] }, { "type": "title", "bbox": [ 0.189, 0.106, 0.411, 0.12 ], "angle": 0, "content": null, "poly": [ 312, 247, 679, 247, 679, 280, 312, 280 ] }, { "type": "text", "bbox": [ 0.146, 0.123, 0.849, 0.158 ], "angle": 0, "content": null, "poly": [ 241, 287, 1404, 287, 1404, 369, 241, 369 ] }, { "type": "text", "bbox": [ 0.182, 0.162, 0.334, 0.175 ], "angle": 0, "content": null, "poly": [ 301, 378, 552, 378, 552, 409, 301, 409 ] }, { "type": "text", "bbox": [ 0.2, 0.181, 0.31, 0.195 ], "angle": 0, "content": null, "poly": [ 330, 423, 512, 423, 512, 456, 330, 456 ] }, { "type": "text", "bbox": [ 0.182, 0.198, 0.525, 0.213 ], "angle": 0, "content": null, "poly": [ 301, 463, 868, 463, 868, 498, 301, 498 ] }, { "type": "title", "bbox": [ 0.19, 0.225, 0.502, 0.242 ], "angle": 0, "content": null, "poly": [ 314, 526, 830, 526, 830, 566, 314, 566 ] }, { "type": "title", "bbox": [ 0.183, 0.263, 0.354, 0.277 ], "angle": 0, "content": null, "poly": [ 302, 615, 585, 615, 585, 647, 302, 647 ] }, { "type": "code", "bbox": [ 0.163, 0.29, 0.834, 0.472 ], "angle": 0, "content": "Linux内核中使用structcdev来描述一个字符设备，定义在/usr/src/linux-4.4.19/ \ninclude/linux/cdev.h文件中：struct cdev{struct kobject kobj; /*内嵌的内核对象，包括引用计数、名称、父指针等*/struct module \\*owner; /*所属内核模块，一般设置为THISMODULE*/const struct file_operations \\*ops; /*设备操作集合\\*/struct list_head list; /*设备的inode链表头\\*/dev_t dev; /*设备号\\*/unsigned int count; /*分配的设备号数目\\*/}；" }, { "type": "text", "bbox": [ 0.146, 0.476, 0.85, 0.528 ], "angle": 0, "content": null, "poly": [ 241, 1113, 1405, 1113, 1405, 1234, 241, 1234 ] }, { "type": "code", "bbox": [ 0.197, 0.533, 0.41, 0.621 ], "angle": 0, "content": "```c\nstruct mymem_dev\n{\n Struct cdev cdev;\n Unsigned char mem[512];\n};" }, { "type": "title", "bbox": [ 0.182, 0.634, 0.474, 0.649 ], "angle": 0, "content": null, "poly": [ 301, 1482, 783, 1482, 783, 1518, 301, 1518 ] }, { "type": "text", "bbox": [ 0.146, 0.661, 0.849, 0.695 ], "angle": 0, "content": null, "poly": [ 241, 1546, 1404, 1546, 1404, 1625, 241, 1625 ] }, { "type": "code", "bbox": [ 0.201, 0.699, 0.822, 0.863 ], "angle": 0, "content": "static struct char_device_struct{ struct char_device_struct \\*next; /*指向散列链表中的下一个元素的指针*/ unsigned int major; /\\*主设备号\\*/ unsigned int baseminor; /\\*起始次设备号\\*/ int minorct; /\\*次设备号区间大小\\*/ char name[64]; /\\*设备名\\*/ struct file_operations \\*fops; /\\*未使用\\*/ struct cdev \\*cdev; /\\*指向字符设备描述符的指针\\*/ \n\\*chrdevs[CHRDEV Major HASH SIZE];" }, { "type": "title", "bbox": [ 0.181, 0.875, 0.382, 0.89 ], "angle": 0, "content": null, "poly": [ 299, 2046, 631, 2046, 631, 2081, 299, 2081 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "text", "bbox": [ 0.145, 0.086, 0.85, 0.139 ], "angle": 0, "content": null, "poly": [ 239, 201, 1405, 201, 1405, 325, 239, 325 ] }, { "type": "text", "bbox": [ 0.18, 0.142, 0.641, 0.158 ], "angle": 0, "content": null, "poly": [ 297, 332, 1060, 332, 1060, 369, 297, 369 ] }, { "type": "code", "bbox": [ 0.182, 0.162, 0.851, 0.343 ], "angle": 0, "content": "struct file_operations{ struct module \\*owner; /*拥有该结构的模块，一般为THIS_MODULE*/ ssize_t (*read) (struct file \\*, char __user \\*, size_t, loff_t \\*); /*从设备中读取数据*/ ssize_t (\\*write) (struct file \\*, const char __user \\*, size_t, loff_t \\*);/*向设备中写数据*/ int (\\*ioctl) (struct inode \\*, struct file \\*, unsigned int, unsigned long); /*执行设备的I/O 控制命令\\*/ int (\\*open) (struct inode \\*, struct file \\*); /*打开设备文件\\*/ int (\\*release) (struct inode \\*, struct file \\*); /*关闭设备文件\\*/" }, { "type": "title", "bbox": [ 0.18, 0.374, 0.282, 0.388 ], "angle": 0, "content": null, "poly": [ 297, 874, 466, 874, 466, 907, 297, 907 ] }, { "type": "text", "bbox": [ 0.146, 0.401, 0.85, 0.435 ], "angle": 0, "content": null, "poly": [ 241, 937, 1405, 937, 1405, 1017, 241, 1017 ] }, { "type": "code", "bbox": [ 0.18, 0.44, 0.748, 0.566 ], "angle": 0, "content": "```c\nstruct file{\nmode_t fmode; /*文件模式，如FMODE_READ，FMODE_WRITE*/\nloff_t f_pos; /*当前读写指针*/\nstruct file_operations *f_op; /*文件操作函数表指针*/\nvoid *private_data; /*非常重要，用于存放转换后的设备描述结构指针*/\n};" }, { "type": "title", "bbox": [ 0.18, 0.578, 0.307, 0.592 ], "angle": 0, "content": null, "poly": [ 297, 1351, 507, 1351, 507, 1384, 297, 1384 ] }, { "type": "text", "bbox": [ 0.18, 0.605, 0.767, 0.622 ], "angle": 0, "content": null, "poly": [ 297, 1415, 1268, 1415, 1268, 1454, 297, 1454 ] }, { "type": "code", "bbox": [ 0.183, 0.626, 0.576, 0.713 ], "angle": 0, "content": "```c\nstruct inode {\n dev_t i_rdev; /*设备号*/\n struct cdev *i_cdev; /*该设备的 cdev 结构*/\n ......\n};" }, { "type": "text", "bbox": [ 0.18, 0.716, 0.545, 0.731 ], "angle": 0, "content": null, "poly": [ 297, 1674, 901, 1674, 901, 1709, 297, 1709 ] }, { "type": "title", "bbox": [ 0.192, 0.778, 0.585, 0.797 ], "angle": 0, "content": null, "poly": [ 317, 1819, 967, 1819, 967, 1864, 317, 1864 ] }, { "type": "title", "bbox": [ 0.191, 0.833, 0.517, 0.849 ], "angle": 0, "content": null, "poly": [ 315, 1948, 855, 1948, 855, 1985, 315, 1985 ] }, { "type": "text", "bbox": [ 0.18, 0.861, 0.524, 0.877 ], "angle": 0, "content": null, "poly": [ 297, 2013, 866, 2013, 866, 2051, 297, 2051 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "image", "bbox": [ 0.184, 0.085, 0.789, 0.362 ], "angle": 0, "content": null }, { "type": "image_caption", "bbox": [ 0.348, 0.365, 0.604, 0.38 ], "angle": 0, "content": null, "poly": [ 575, 853, 999, 853, 999, 888, 575, 888 ] }, { "type": "title", "bbox": [ 0.19, 0.392, 0.659, 0.409 ], "angle": 0, "content": null, "poly": [ 314, 916, 1089, 916, 1089, 956, 314, 956 ] }, { "type": "text", "bbox": [ 0.181, 0.42, 0.67, 0.436 ], "angle": 0, "content": null, "poly": [ 299, 982, 1108, 982, 1108, 1019, 299, 1019 ] }, { "type": "text", "bbox": [ 0.205, 0.439, 0.8, 0.455 ], "angle": 0, "content": null, "poly": [ 339, 1026, 1323, 1026, 1323, 1064, 339, 1064 ] }, { "type": "text", "bbox": [ 0.205, 0.457, 0.85, 0.509 ], "angle": 0, "content": null, "poly": [ 339, 1068, 1405, 1068, 1405, 1190, 339, 1190 ] }, { "type": "text", "bbox": [ 0.205, 0.513, 0.707, 0.529 ], "angle": 0, "content": null, "poly": [ 339, 1199, 1169, 1199, 1169, 1237, 339, 1237 ] }, { "type": "text", "bbox": [ 0.205, 0.532, 0.765, 0.548 ], "angle": 0, "content": null, "poly": [ 339, 1244, 1265, 1244, 1265, 1281, 339, 1281 ] }, { "type": "text", "bbox": [ 0.205, 0.55, 0.564, 0.565 ], "angle": 0, "content": null, "poly": [ 339, 1286, 932, 1286, 932, 1321, 339, 1321 ] }, { "type": "text", "bbox": [ 0.205, 0.569, 0.555, 0.584 ], "angle": 0, "content": null, "poly": [ 339, 1330, 917, 1330, 917, 1365, 339, 1365 ] }, { "type": "text", "bbox": [ 0.206, 0.588, 0.381, 0.602 ], "angle": 0, "content": null, "poly": [ 340, 1375, 630, 1375, 630, 1408, 340, 1408 ] }, { "type": "text", "bbox": [ 0.205, 0.606, 0.812, 0.622 ], "angle": 0, "content": null, "poly": [ 339, 1417, 1343, 1417, 1343, 1454, 339, 1454 ] }, { "type": "title", "bbox": [ 0.191, 0.633, 0.496, 0.648 ], "angle": 0, "content": null, "poly": [ 315, 1480, 820, 1480, 820, 1515, 315, 1515 ] }, { "type": "title", "bbox": [ 0.182, 0.671, 0.309, 0.685 ], "angle": 0, "content": null, "poly": [ 301, 1569, 511, 1569, 511, 1602, 301, 1602 ] }, { "type": "text", "bbox": [ 0.146, 0.698, 0.847, 0.732 ], "angle": 0, "content": null, "poly": [ 241, 1632, 1400, 1632, 1400, 1712, 241, 1712 ] }, { "type": "text", "bbox": [ 0.148, 0.736, 0.7, 0.752 ], "angle": 0, "content": null, "poly": [ 244, 1721, 1157, 1721, 1157, 1758, 244, 1758 ] }, { "type": "text", "bbox": [ 0.148, 0.754, 0.336, 0.769 ], "angle": 0, "content": null, "poly": [ 244, 1763, 555, 1763, 555, 1798, 244, 1798 ] }, { "type": "text", "bbox": [ 0.179, 0.773, 0.795, 0.789 ], "angle": 0, "content": null, "poly": [ 296, 1808, 1314, 1808, 1314, 1845, 296, 1845 ] }, { "type": "title", "bbox": [ 0.181, 0.801, 0.411, 0.815 ], "angle": 0, "content": null, "poly": [ 299, 1873, 679, 1873, 679, 1906, 299, 1906 ] }, { "type": "text", "bbox": [ 0.146, 0.828, 0.85, 0.862 ], "angle": 0, "content": null, "poly": [ 241, 1936, 1405, 1936, 1405, 2016, 241, 2016 ] }, { "type": "text", "bbox": [ 0.189, 0.866, 0.454, 0.88 ], "angle": 0, "content": null, "poly": [ 312, 2025, 750, 2025, 750, 2058, 312, 2058 ] }, { "type": "text", "bbox": [ 0.242, 0.885, 0.398, 0.9 ], "angle": 0, "content": null, "poly": [ 400, 2070, 658, 2070, 658, 2105, 400, 2105 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "code", "bbox": [ 0.241, 0.087, 0.49, 0.121 ], "angle": 0, "content": "cdev_init(&my_cdev, &fops); \nmy_cdev owner = THISMODULE;" }, { "type": "text", "bbox": [ 0.19, 0.124, 0.473, 0.139 ], "angle": 0, "content": null, "poly": [ 314, 290, 782, 290, 782, 325, 314, 325 ] }, { "type": "code", "bbox": [ 0.241, 0.143, 0.51, 0.194 ], "angle": 0, "content": "```c\nstruct cdev *my_cdev = cdev_alloc();\nmy_cdev->ops = &fops;\nmy_cdev->owner = THISMODULE;" }, { "type": "text", "bbox": [ 0.146, 0.198, 0.838, 0.231 ], "angle": 0, "content": null, "poly": [ 241, 463, 1386, 463, 1386, 540, 241, 540 ] }, { "type": "code", "bbox": [ 0.206, 0.234, 0.696, 0.546 ], "angle": 0, "content": "```c\nstruct cdev *cdev_alloc(void) \n{ \n struct cdev *p = kzalloc(sizeof(struct cdev), GFP_KERNEL); \n if (p) { \n INIT_LIST_HEAD(&p->list); \n kobject_init(&p->kobj, &ktype_cdev_dynamic); \n } \n return p; \n} \nvoid cdev_init(struct cdev *cdev, const struct file_operations *fops) \n{ \n memset(cdev, 0, sizeof *cdev); \n INIT_LIST_HEAD(&cdev->list); \n kobject_init(&cdev->kobj, &ktype_cdev_default); \n cdev->ops = fops;" }, { "type": "text", "bbox": [ 0.207, 0.55, 0.752, 0.565 ], "angle": 0, "content": null, "poly": [ 342, 1286, 1243, 1286, 1243, 1321, 342, 1321 ] }, { "type": "title", "bbox": [ 0.182, 0.578, 0.341, 0.593 ], "angle": 0, "content": null, "poly": [ 301, 1351, 564, 1351, 564, 1387, 301, 1387 ] }, { "type": "text", "bbox": [ 0.146, 0.606, 0.848, 0.64 ], "angle": 0, "content": null, "poly": [ 241, 1417, 1402, 1417, 1402, 1496, 241, 1496 ] }, { "type": "code", "bbox": [ 0.18, 0.643, 0.819, 0.751 ], "angle": 0, "content": "int cdev_add(struct cdev *p, dev_t dev, unsigned count) \n{ \n p->dev = dev; \n p->count = count; \n return kobj_map(cdev_map, dev, count, NULL, exact_MATCH, exact_lock, p); \n}" }, { "type": "text", "bbox": [ 0.182, 0.754, 0.707, 0.769 ], "angle": 0, "content": null, "poly": [ 301, 1763, 1169, 1763, 1169, 1798, 301, 1798 ] }, { "type": "text", "bbox": [ 0.145, 0.772, 0.847, 0.844 ], "angle": 0, "content": null, "poly": [ 239, 1805, 1400, 1805, 1400, 1974, 239, 1974 ] }, { "type": "text", "bbox": [ 0.146, 0.847, 0.846, 0.88 ], "angle": 0, "content": null, "poly": [ 241, 1981, 1399, 1981, 1399, 2058, 241, 2058 ] }, { "type": "title", "bbox": [ 0.19, 0.892, 0.557, 0.909 ], "angle": 0, "content": null, "poly": [ 314, 2086, 921, 2086, 921, 2126, 314, 2126 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "title", "bbox": [ 0.182, 0.096, 0.55, 0.112 ], "angle": 0, "content": null, "poly": [ 301, 224, 909, 224, 909, 261, 301, 261 ] }, { "type": "text", "bbox": [ 0.146, 0.124, 0.846, 0.157 ], "angle": 0, "content": null, "poly": [ 241, 290, 1399, 290, 1399, 367, 241, 367 ] }, { "type": "text", "bbox": [ 0.19, 0.161, 0.4, 0.176 ], "angle": 0, "content": null, "poly": [ 314, 376, 661, 376, 661, 411, 314, 411 ] }, { "type": "code", "bbox": [ 0.242, 0.18, 0.682, 0.288 ], "angle": 0, "content": "static int char_dev_open(struct inode *inode, struct file *filp) \n{ // 这里可以进行一些初始化 \n printf(\"char_dev_device_open.\\n\"); \n return 0; \n}" }, { "type": "text", "bbox": [ 0.191, 0.291, 0.339, 0.306 ], "angle": 0, "content": null, "poly": [ 315, 680, 560, 680, 560, 715, 315, 715 ] }, { "type": "code", "bbox": [ 0.242, 0.31, 0.825, 0.418 ], "angle": 0, "content": "```cpp\nssize_t char_dev_read(struct file *file, char __user *buff, size_t count,loff_t *offp) {\n ...\n copy_to_user();\n ...\n}" }, { "type": "text", "bbox": [ 0.191, 0.421, 0.338, 0.436 ], "angle": 0, "content": null, "poly": [ 315, 984, 559, 984, 559, 1019, 315, 1019 ] }, { "type": "code", "bbox": [ 0.242, 0.44, 0.846, 0.566 ], "angle": 0, "content": "```cpp\nssize_t char_dev_write(struct file *file, const char __user *buff, size_t count,loff_t *offp) \n{ \n ... \n copy_from_user(); \n ... \n}" }, { "type": "text", "bbox": [ 0.191, 0.568, 0.351, 0.584 ], "angle": 0, "content": null, "poly": [ 315, 1328, 580, 1328, 580, 1365, 315, 1365 ] }, { "type": "code", "bbox": [ 0.242, 0.588, 0.798, 0.844 ], "angle": 0, "content": "static int char_dev_ioctl(struct inode *inode,struct file *filp,unsigned int cmd, unsigned long arg) \n{ ... switch(cmd) { case xxx_cmd1: break; case xxx_cmd2: break; ... }" }, { "type": "text", "bbox": [ 0.191, 0.847, 0.677, 0.862 ], "angle": 0, "content": null, "poly": [ 315, 1981, 1119, 1981, 1119, 2016, 315, 2016 ] }, { "type": "code", "bbox": [ 0.242, 0.866, 0.695, 0.9 ], "angle": 0, "content": "static int char_dev_release(struct inode *node, struct file *file) {" } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "code", "bbox": [ 0.242, 0.086, 0.526, 0.158 ], "angle": 0, "content": "//这里可以进行一些资源的释放printk(\"char_devdevice release.\\n\");return0;" }, { "type": "title", "bbox": [ 0.185, 0.17, 0.423, 0.186 ], "angle": 0, "content": null, "poly": [ 305, 397, 699, 397, 699, 435, 305, 435 ] }, { "type": "text", "bbox": [ 0.149, 0.197, 0.846, 0.231 ], "angle": 0, "content": null, "poly": [ 246, 460, 1399, 460, 1399, 540, 246, 540 ] }, { "type": "code", "bbox": [ 0.182, 0.236, 0.555, 0.399 ], "angle": 0, "content": "static struct file_operations char_dev_fops = \n{ \n .owner = THISMODULE, \n .open = char_dev_open, //打开设备 \n .release = char_dev_release, //关闭设备 \n .read = char_dev_read, //实现设备读功能 \n .write = char_dev_write, //实现设备写功能 \n .ioct1 = char_dev_ioct1, //实现设备控制功能 \n};" }, { "type": "title", "bbox": [ 0.194, 0.411, 0.333, 0.426 ], "angle": 0, "content": null, "poly": [ 320, 961, 550, 961, 550, 996, 320, 996 ] }, { "type": "text", "bbox": [ 0.149, 0.438, 0.849, 0.473 ], "angle": 0, "content": null, "poly": [ 246, 1024, 1404, 1024, 1404, 1106, 246, 1106 ] }, { "type": "title", "bbox": [ 0.185, 0.485, 0.339, 0.5 ], "angle": 0, "content": null, "poly": [ 305, 1134, 560, 1134, 560, 1169, 305, 1169 ] }, { "type": "code", "bbox": [ 0.182, 0.512, 0.842, 0.622 ], "angle": 0, "content": "Linux内核使用cdev_del()函数向系统删除一个cdev，完成字符设备的注销： \nvoid cdev_del(struct cdev *p) \n{ \n cdev_unmap(p->dev, p->count); //调用 kobj_unmap()释放 cdev_map散列表中的对象 \n kobj_put(&p->kobj); //释放 cdev结构本身 \n}" }, { "type": "title", "bbox": [ 0.185, 0.652, 0.307, 0.667 ], "angle": 0, "content": null, "poly": [ 305, 1525, 507, 1525, 507, 1560, 305, 1560 ] }, { "type": "text", "bbox": [ 0.149, 0.679, 0.848, 0.713 ], "angle": 0, "content": null, "poly": [ 246, 1588, 1402, 1588, 1402, 1667, 246, 1667 ] }, { "type": "code", "bbox": [ 0.184, 0.718, 0.64, 0.733 ], "angle": 0, "content": "void unregister_chrdev_region(dev_t first, unsigned int count);" }, { "type": "title", "bbox": [ 0.196, 0.759, 0.656, 0.779 ], "angle": 0, "content": null, "poly": [ 324, 1775, 1085, 1775, 1085, 1822, 324, 1822 ] }, { "type": "text", "bbox": [ 0.149, 0.805, 0.848, 0.839 ], "angle": 0, "content": null, "poly": [ 246, 1882, 1402, 1882, 1402, 1962, 246, 1962 ] }, { "type": "title", "bbox": [ 0.186, 0.852, 0.289, 0.867 ], "angle": 0, "content": null, "poly": [ 307, 1992, 478, 1992, 478, 2027, 307, 2027 ] }, { "type": "text", "bbox": [ 0.191, 0.88, 0.707, 0.895 ], "angle": 0, "content": null, "poly": [ 315, 2058, 1169, 2058, 1169, 2093, 315, 2093 ] }, { "type": "code", "bbox": [ 0.184, 0.9, 0.318, 0.914 ], "angle": 0, "content": "obj-m :=c_driver.o" } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "code", "bbox": [ 0.182, 0.087, 0.559, 0.194 ], "angle": 0, "content": "KDIR :=/usr/src/linux-headers-4.4.0-36-generic \nPWD :=$(shell pwd) \ndefault: \n make -C $(KDIR) M=$(PWD) modules \nclean: \n make -C $(KDIR) M=$(PWD) clean" }, { "type": "text", "bbox": [ 0.182, 0.198, 0.525, 0.213 ], "angle": 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"angle": 0, "content": null, "poly": [ 239, 1981, 1407, 1981, 1407, 2102, 239, 2102 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "text", "bbox": [ 0.146, 0.086, 0.782, 0.102 ], "angle": 0, "content": null, "poly": [ 241, 201, 1293, 201, 1293, 238, 241, 238 ] }, { "type": "text", "bbox": [ 0.145, 0.105, 0.85, 0.155 ], "angle": 0, "content": null, "poly": [ 239, 245, 1405, 245, 1405, 362, 239, 362 ] }, { "type": "code", "bbox": [ 0.18, 0.162, 0.399, 0.232 ], "angle": 0, "content": "include \nmain(){ printf(\"Hello,World!\\n\"); \n}" }, { "type": "text", "bbox": [ 0.189, 0.235, 0.72, 0.25 ], "angle": 0, "content": null, "poly": [ 312, 549, 1190, 549, 1190, 584, 312, 584 ] }, { "type": "text", "bbox": [ 0.19, 0.253, 0.637, 0.269 ], "angle": 0, "content": null, "poly": [ 314, 591, 1053, 591, 1053, 629, 314, 629 ] }, { "type": "list", "bbox": [ 0.189, 0.235, 0.72, 0.269 ], "angle": 0, "content": null }, { "type": "title", "bbox": [ 0.183, 0.29, 0.272, 0.305 ], "angle": 0, "content": null, "poly": [ 302, 678, 449, 678, 449, 713, 302, 713 ] }, { "type": "text", "bbox": [ 0.19, 0.309, 0.586, 0.324 ], "angle": 0, "content": null, "poly": [ 314, 722, 969, 722, 969, 757, 314, 757 ] }, { "type": "text", "bbox": [ 0.19, 0.327, 0.631, 0.343 ], "angle": 0, "content": null, "poly": [ 314, 764, 1043, 764, 1043, 802, 314, 802 ] }, { "type": "list", "bbox": [ 0.19, 0.309, 0.631, 0.343 ], "angle": 0, "content": null }, { "type": "code", "bbox": [ 0.181, 0.347, 0.514, 0.417 ], "angle": 0, "content": "You raise me up, so I can stand on mountains; \nYou raise me up, to walk on stormy seas; \nI am strong, when I am on your shoulders; \nYou raise me up: To more than I can be." }, { "type": "title", "bbox": [ 0.183, 0.439, 0.272, 0.453 ], "angle": 0, "content": null, "poly": [ 302, 1026, 449, 1026, 449, 1059, 302, 1059 ] }, { "type": "text", "bbox": [ 0.182, 0.457, 0.609, 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后缀约定规则
.cC语言源代码文件
.a由目标文件构成的档案库文件
.C .cc .cxxC++源代码文件
.h程序包含的头文件
.i已经预处理过的C源代码文件
.ii已经预处理过的C++源代码文件
.mObjective-C源代码文件
.o编译后的目标文件
.s汇编语言源代码文件
.S经过预编译的汇编语言源代码文件
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258, 421, 444, 421, 444, 453, 258, 453 ] }, { "type": "code", "bbox": [ 0.208, 0.199, 0.374, 0.232 ], "angle": 0, "content": "include int pipe(int fileds[2]);" }, { "type": "text", "bbox": [ 0.156, 0.235, 0.232, 0.25 ], "angle": 0, "content": null, "poly": [ 258, 549, 383, 549, 383, 584, 258, 584 ] }, { "type": "text", "bbox": [ 0.146, 0.257, 0.845, 0.294 ], "angle": 0, "content": null, "poly": [ 241, 601, 1397, 601, 1397, 687, 241, 687 ] }, { "type": "text", "bbox": [ 0.156, 0.297, 0.232, 0.311 ], "angle": 0, "content": null, "poly": [ 258, 694, 383, 694, 383, 727, 258, 727 ] }, { "type": "text", "bbox": [ 0.146, 0.319, 0.85, 0.356 ], "angle": 0, "content": null, "poly": [ 241, 746, 1405, 746, 1405, 832, 241, 832 ] }, { "type": "text", "bbox": [ 0.156, 0.358, 0.251, 0.373 ], "angle": 0, "content": null, "poly": [ 258, 837, 415, 837, 415, 872, 258, 872 ] }, { "type": "text", "bbox": [ 0.147, 0.376, 0.55, 0.392 ], "angle": 0, "content": null, "poly": [ 243, 879, 909, 879, 909, 916, 243, 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1212, 1815, 1212, 1852, 344, 1852 ] }, { "type": "text", "bbox": [ 0.146, 0.795, 0.705, 0.81 ], "angle": 0, "content": null, "poly": [ 241, 1859, 1166, 1859, 1166, 1894, 241, 1894 ] }, { "type": "text", "bbox": [ 0.146, 0.814, 0.336, 0.829 ], "angle": 0, "content": null, "poly": [ 241, 1903, 555, 1903, 555, 1939, 241, 1939 ] }, { "type": "text", "bbox": [ 0.145, 0.832, 0.847, 0.848 ], "angle": 0, "content": null, "poly": [ 239, 1946, 1400, 1946, 1400, 1983, 239, 1983 ] }, { "type": "text", "bbox": [ 0.146, 0.851, 0.606, 0.867 ], "angle": 0, "content": null, "poly": [ 241, 1990, 1002, 1990, 1002, 2027, 241, 2027 ] }, { "type": "list", "bbox": [ 0.145, 0.832, 0.847, 0.867 ], "angle": 0, "content": null }, { "type": "text", "bbox": [ 0.155, 0.87, 0.449, 0.884 ], "angle": 0, "content": null, "poly": [ 256, 2034, 742, 2034, 742, 2067, 256, 2067 ] }, { "type": "title", "bbox": [ 0.146, 0.888, 0.259, 0.903 ], "angle": 0, "content": null, "poly": [ 241, 2077, 428, 2077, 428, 2112, 241, 2112 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "text", "bbox": [ 0.146, 0.09, 0.853, 0.255 ], "angle": 0, "content": null, "poly": [ 241, 210, 1410, 210, 1410, 596, 241, 596 ] }, { "type": "text", "bbox": [ 0.182, 0.258, 0.392, 0.273 ], "angle": 0, "content": null, "poly": [ 301, 603, 648, 603, 648, 638, 301, 638 ] }, { "type": "code", "bbox": [ 0.182, 0.277, 0.542, 0.33 ], "angle": 0, "content": "include \n#include \nint mkfifo(const char \\*pathname,mode_t mode)" }, { "type": "text", "bbox": [ 0.145, 0.336, 0.848, 0.436 ], "angle": 0, "content": null, "poly": [ 239, 785, 1402, 785, 1402, 1019, 239, 1019 ] }, { "type": "text", "bbox": [ 0.146, 0.443, 0.848, 0.479 ], "angle": 0, "content": null, "poly": [ 241, 1036, 1402, 1036, 1402, 1120, 241, 1120 ] }, { "type": "code", "bbox": [ 0.182, 0.482, 0.487, 0.554 ], "angle": 0, "content": "include \n#include \n#include \nint open(const char \\*pathname,int flags);" }, { "type": "text", "bbox": [ 0.145, 0.56, 0.85, 0.703 ], "angle": 0, "content": null, "poly": [ 239, 1309, 1405, 1309, 1405, 1644, 239, 1644 ] }, { "type": "text", "bbox": [ 0.146, 0.709, 0.85, 0.746 ], "angle": 0, "content": null, "poly": [ 241, 1658, 1405, 1658, 1405, 1744, 241, 1744 ] }, { "type": "title", "bbox": [ 0.193, 0.772, 0.514, 0.791 ], "angle": 0, "content": null, "poly": [ 319, 1805, 850, 1805, 850, 1850, 319, 1850 ] }, { "type": "text", "bbox": [ 0.146, 0.822, 0.85, 0.903 ], "angle": 0, "content": null, "poly": [ 241, 1922, 1405, 1922, 1405, 2112, 241, 2112 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "text", "bbox": [ 0.146, 0.091, 0.406, 0.106 ], "angle": 0, "content": null, "poly": [ 241, 212, 671, 212, 671, 247, 241, 247 ] }, { "type": "title", "bbox": [ 0.182, 0.112, 0.279, 0.128 ], "angle": 0, "content": null, "poly": [ 301, 261, 461, 261, 461, 299, 301, 299 ] }, { "type": "title", "bbox": [ 0.155, 0.134, 0.406, 0.149 ], "angle": 0, "content": null, "poly": [ 256, 313, 671, 313, 671, 348, 256, 348 ] }, { "type": "text", "bbox": [ 0.146, 0.155, 0.85, 0.213 ], "angle": 0, "content": null, "poly": [ 241, 362, 1405, 362, 1405, 498, 241, 498 ] }, { "type": "code", "bbox": [ 0.182, 0.219, 0.727, 0.298 ], "angle": 0, "content": "```c\nstruct msgbuf{ /*消息定义的参照格式*/\n long mtype; /*消息类型（大于0的长整数）\n char mtext[1]; /*消息正文*/\n};" }, { "type": "text", "bbox": [ 0.146, 0.304, 0.85, 0.363 ], "angle": 0, "content": null, "poly": [ 241, 711, 1405, 711, 1405, 849, 241, 849 ] }, { "type": "text", "bbox": [ 0.145, 0.369, 0.85, 0.406 ], "angle": 0, "content": null, "poly": [ 239, 863, 1405, 863, 1405, 949, 239, 949 ] }, { "type": "title", "bbox": [ 0.156, 0.412, 0.361, 0.427 ], "angle": 0, "content": null, "poly": [ 258, 963, 597, 963, 597, 998, 258, 998 ] }, { "type": "text", "bbox": [ 0.147, 0.433, 0.85, 0.47 ], "angle": 0, "content": null, "poly": [ 243, 1012, 1405, 1012, 1405, 1099, 243, 1099 ] }, { "type": "code", "bbox": [ 0.182, 0.476, 0.797, 0.619 ], "angle": 0, "content": "```java\nstruct msg {\n struct msg *msg_next; /*消息队列链接指针，指向队列中的下一条消息 */\n long msg_type; /*消息类型，同 struct msgbuf 中的 mtype*/\n char *msgSpot; /*消息正文的地址，指向 msgbuf 的消息正文 */\n time_t msg_stime; /*消息发送的时间 */\n short msg-ts; /*消息正文的大小 */\n};" }, { "type": "title", "bbox": [ 0.156, 0.626, 0.473, 0.642 ], "angle": 0, "content": null, "poly": [ 258, 1464, 782, 1464, 782, 1501, 258, 1501 ] }, { "type": "code", "bbox": [ 0.182, 0.647, 0.788, 0.853 ], "angle": 0, "content": "struct ipcperm{ \nkey_t key; /* IPC对象键值*/ \nushort uid; /* owner euid and egid */ \nushort gid; \nushort cuid; /* creator euid and egid */ \nushort cgid; \nushort mode; /* 访问权限 */ \nushort seq; /* slot usage sequence number，即IPC对象使用频率信息*/}; \n其中：" }, { "type": "text", "bbox": [ 0.146, 0.861, 0.85, 0.898 ], "angle": 0, "content": null, "poly": [ 241, 2013, 1405, 2013, 1405, 2100, 241, 2100 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "text", "bbox": [ 0.145, 0.09, 0.853, 0.236 ], "angle": 0, "content": null, "poly": [ 239, 210, 1410, 210, 1410, 552, 239, 552 ] }, { "type": "text", "bbox": [ 0.145, 0.24, 0.851, 0.279 ], "angle": 0, "content": null, "poly": [ 239, 561, 1407, 561, 1407, 652, 239, 652 ] }, { "type": "table", "bbox": [ 0.324, 0.282, 0.561, 0.427 ], "angle": 0, "content": "
访问权限八进制整数
拥有者可读0400
拥有者可写0200
同组用户可读0040
同组用户可写0020
其他用户可读0004
其他用户可写0002
" }, { "type": "text", "bbox": [ 0.145, 0.433, 0.843, 0.47 ], "angle": 0, "content": null, "poly": [ 239, 1012, 1394, 1012, 1394, 1099, 239, 1099 ] }, { "type": "title", "bbox": [ 0.155, 0.476, 0.46, 0.492 ], "angle": 0, "content": null, "poly": [ 256, 1113, 760, 1113, 760, 1150, 256, 1150 ] }, { "type": "text", "bbox": [ 0.146, 0.497, 0.851, 0.534 ], "angle": 0, "content": null, "poly": [ 241, 1162, 1407, 1162, 1407, 1249, 241, 1249 ] }, { "type": "code", "bbox": [ 0.182, 0.54, 0.727, 0.833 ], "angle": 0, "content": "```c\nstruct msqid_ds {\n struct ipcperm msg_perm; /* 消息队列访问权限*/\n struct msg *msg_first; /* 队列上第一条消息，即链表头*/\n struct msg *msg_last; /* 队列中的最后一条消息，即链表尾*/\n time_t msg_stime; /* 发送给队列的最后一条消息的时间 */\n time_t msg_rtime; /* 从消息队列接收到最后一条消息的时间 */\n time_t msg_ctime; /* 最后修改队列的时间*/\n}\n... \nushort msg_cbytes; /*队列上所有消息总的字节数 */\nushort msg_qnum; /*当前队列上消息的个数 */\nushort msg_qbytes; /* 队列允许的最大的字节数 */\nushort msg_lspid; /* 发送最后一条消息的进程的 pid */\nushort msg_lrpid; /* 接收最后一条消息的进程的 pid */\n};" }, { "type": "text", "bbox": [ 0.18, 0.839, 0.848, 0.855 ], "angle": 0, "content": null, "poly": [ 297, 1962, 1402, 1962, 1402, 1999, 297, 1999 ] }, { "type": "title", "bbox": [ 0.182, 0.861, 0.403, 0.877 ], "angle": 0, "content": null, "poly": [ 301, 2013, 666, 2013, 666, 2051, 301, 2051 ] }, { "type": "text", "bbox": [ 0.18, 0.882, 0.721, 0.898 ], "angle": 0, "content": null, "poly": [ 297, 2062, 1192, 2062, 1192, 2100, 297, 2100 ] } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.064 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 149, 620, 149 ] }, { "type": "title", "bbox": [ 0.156, 0.09, 0.326, 0.107 ], "angle": 0, "content": null, "poly": [ 258, 210, 539, 210, 539, 250, 258, 250 ] }, { "type": "text", "bbox": [ 0.182, 0.112, 0.282, 0.127 ], "angle": 0, "content": null, "poly": [ 301, 261, 466, 261, 466, 297, 301, 297 ] }, { "type": "code", "bbox": [ 0.182, 0.134, 0.486, 0.214 ], "angle": 0, "content": "include \n#include \n#include \nint msgget(key_t key, int msgflg);" }, { "type": "text", "bbox": [ 0.182, 0.219, 0.246, 0.234 ], "angle": 0, "content": null, "poly": [ 301, 512, 406, 512, 406, 547, 301, 547 ] }, { "type": "text", "bbox": [ 0.146, 0.24, 0.85, 0.277 ], "angle": 0, "content": null, "poly": [ 241, 561, 1405, 561, 1405, 647, 241, 647 ] }, { "type": "text", "bbox": [ 0.146, 0.283, 0.851, 0.363 ], "angle": 0, "content": null, "poly": [ 241, 661, 1407, 661, 1407, 849, 241, 849 ] }, { "type": "text", "bbox": [ 0.146, 0.369, 0.841, 0.428 ], "angle": 0, "content": null, "poly": [ 241, 863, 1391, 863, 1391, 1001, 241, 1001 ] }, { "type": "text", "bbox": [ 0.146, 0.433, 0.851, 0.47 ], "angle": 0, "content": null, "poly": [ 241, 1012, 1407, 1012, 1407, 1099, 241, 1099 ] }, { "type": "list", "bbox": [ 0.146, 0.369, 0.851, 0.47 ], "angle": 0, "content": null }, { "type": "text", "bbox": [ 0.187, 0.476, 0.538, 0.492 ], "angle": 0, "content": null, "poly": [ 309, 1113, 889, 1113, 889, 1150, 309, 1150 ] }, { "type": 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1595 ] }, { "type": "text", "bbox": [ 0.18, 0.689, 0.774, 0.705 ], "angle": 0, "content": null, "poly": [ 297, 1611, 1280, 1611, 1280, 1648, 297, 1648 ] }, { "type": "text", "bbox": [ 0.181, 0.711, 0.506, 0.726 ], "angle": 0, "content": null, "poly": [ 299, 1663, 836, 1663, 836, 1698, 299, 1698 ] }, { "type": "text", "bbox": [ 0.181, 0.732, 0.575, 0.747 ], "angle": 0, "content": null, "poly": [ 299, 1712, 951, 1712, 951, 1747, 299, 1747 ] }, { "type": "title", "bbox": [ 0.156, 0.754, 0.325, 0.769 ], "angle": 0, "content": null, "poly": [ 258, 1763, 537, 1763, 537, 1798, 258, 1798 ] }, { "type": "text", "bbox": [ 0.182, 0.775, 0.282, 0.79 ], "angle": 0, "content": null, "poly": [ 301, 1812, 466, 1812, 466, 1847, 301, 1847 ] }, { "type": "code", "bbox": [ 0.182, 0.797, 0.794, 0.877 ], "angle": 0, "content": "include \n#include \n#include \nint mgsnd(int msqid, struct msgbuf \\*msgp,size_t msgsz,int msgflg);" }, { "type": "text", "bbox": [ 0.182, 0.882, 0.246, 0.897 ], "angle": 0, 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898 ] }, { "type": "text", "bbox": [ 0.181, 0.39, 0.62, 0.405 ], "angle": 0, "content": null, "poly": [ 299, 912, 1025, 912, 1025, 947, 299, 947 ] }, { "type": "text", "bbox": [ 0.147, 0.411, 0.849, 0.447 ], "angle": 0, "content": null, "poly": [ 243, 961, 1404, 961, 1404, 1045, 243, 1045 ] }, { "type": "text", "bbox": [ 0.181, 0.454, 0.629, 0.47 ], "angle": 0, "content": null, "poly": [ 299, 1061, 1040, 1061, 1040, 1099, 299, 1099 ] }, { "type": "title", "bbox": [ 0.156, 0.476, 0.325, 0.491 ], "angle": 0, "content": null, "poly": [ 258, 1113, 537, 1113, 537, 1148, 258, 1148 ] }, { "type": "text", "bbox": [ 0.182, 0.497, 0.282, 0.512 ], "angle": 0, "content": null, "poly": [ 301, 1162, 466, 1162, 466, 1197, 301, 1197 ] }, { "type": "code", "bbox": [ 0.146, 0.52, 0.85, 0.62 ], "angle": 0, "content": "include #include #include ssize_t msgcv(int msqid, struct msgbuf *msgp, size_t msgsz, long msgtyp, int msgflg);" }, { "type": "text", "bbox": [ 0.182, 0.626, 0.247, 0.64 ], "angle": 0, 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}, { "type": "code", "bbox": [ 0.22, 0.461, 0.498, 0.523 ], "angle": 0, "content": "include \n#include \nint shmget(key_t,int size,int shmflg);" }, { "type": "text", "bbox": [ 0.187, 0.53, 0.304, 0.545 ], "angle": 0, "content": null, "poly": [ 309, 1239, 502, 1239, 502, 1274, 309, 1274 ] }, { "type": "text", "bbox": [ 0.22, 0.553, 0.607, 0.569 ], "angle": 0, "content": null, "poly": [ 363, 1293, 1003, 1293, 1003, 1330, 363, 1330 ] }, { "type": "text", "bbox": [ 0.22, 0.576, 0.607, 0.591 ], "angle": 0, "content": null, "poly": [ 363, 1347, 1003, 1347, 1003, 1382, 363, 1382 ] }, { "type": "text", "bbox": [ 0.221, 0.599, 0.493, 0.615 ], "angle": 0, "content": null, "poly": [ 365, 1401, 815, 1401, 815, 1438, 365, 1438 ] }, { "type": "text", "bbox": [ 0.187, 0.623, 0.287, 0.637 ], "angle": 0, "content": null, "poly": [ 309, 1457, 474, 1457, 474, 1489, 309, 1489 ] }, { "type": "text", "bbox": [ 0.22, 0.645, 0.807, 0.661 ], "angle": 0, "content": null, "poly": [ 363, 1508, 1334, 1508, 1334, 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"bbox": [ 0.146, 0.711, 0.85, 0.833 ], "angle": 0, "content": "typedef struct USEROPEN \n{ char filename[8]; //文件名 char exname[3];//文件扩展名 unsigned char attribute;//文件属性：值为0时表示目录文件，值为1时表示数据文件" }, { "type": "code", "bbox": [ 0.216, 0.839, 0.549, 0.899 ], "angle": 0, "content": "unsigned short time; //文件创建时间 \nunsigned short data; //文件创建日期 \nunsigned short first; //文件起始盘块号" } ], [ { "type": "header", "bbox": [ 0.375, 0.05, 0.621, 0.063 ], "angle": 0, "content": null, "poly": [ 620, 116, 1027, 116, 1027, 147, 620, 147 ] }, { "type": "text", "bbox": [ 0.146, 0.091, 0.847, 0.127 ], "angle": 0, "content": null, "poly": [ 241, 212, 1400, 212, 1400, 297, 241, 297 ] }, { "type": "text", "bbox": [ 0.215, 0.133, 0.822, 0.171 ], "angle": 0, "content": null, "poly": [ 355, 311, 1359, 311, 1359, 399, 355, 399 ] }, { "type": "text", "bbox": [ 0.215, 0.176, 0.848, 0.213 ], "angle": 0, "content": null, "poly": [ 355, 411, 1402, 411, 1402, 498, 355, 498 ] }, { "type": "text", "bbox": [ 0.217, 0.219, 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块数 1块 2块 2块 995块
引导块FAT1FAT2数据区
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