git.joshuawise.com / netwatch.git / blame
| Commit | Line | Data |
|---|---|---|
| 6f9272bd JW |
1 | /* |
| 2 | * Copyright (c) 2001-2003 Swedish Institute of Computer Science. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without modification, | |
| 6 | * are permitted provided that the following conditions are met: | |
| 7 | * | |
| 8 | * 1. Redistributions of source code must retain the above copyright notice, | |
| 9 | * this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 11 | * this list of conditions and the following disclaimer in the documentation | |
| 12 | * and/or other materials provided with the distribution. | |
| 13 | * 3. The name of the author may not be used to endorse or promote products | |
| 14 | * derived from this software without specific prior written permission. | |
| 15 | * | |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT | |
| 19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT | |
| 21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
| 24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY | |
| 25 | * OF SUCH DAMAGE. | |
| 26 | * | |
| 27 | * This file is part of the lwIP TCP/IP stack. | |
| 28 | * | |
| 29 | * Author: Adam Dunkels <adam@sics.se> | |
| 30 | * | |
| 31 | */ | |
| 32 | #include "lwip/def.h" | |
| 33 | #include "fs.h" | |
| 34 | #include "fsdata.h" | |
| 35 | #include "fsdata.c" | |
| 923ea2c2 | 36 | #include <io.h> |
| 9343e933 JW |
37 | #include <minilib.h> |
| 38 | #include <paging.h> | |
| 4e3ef36b | 39 | #include <demap.h> |
| 9343e933 | 40 | #include <output.h> |
| 4e3ef36b | 41 | #include <state.h> |
| 6f9272bd | 42 | |
| 4e3ef36b | 43 | static char http_output_buffer[1280]; |
| db9fad13 | 44 | |
| 6f9272bd JW |
45 | /*-----------------------------------------------------------------------------------*/ |
| 46 | ||
| 923ea2c2 | 47 | void handle_regs(struct fs_file *file) |
| 6f9272bd | 48 | { |
| 4e3ef36b JW |
49 | int i; |
| 50 | int len; | |
| 51 | ||
| 52 | len = snprintf(http_output_buffer, sizeof(http_output_buffer), "<html><pre>"); | |
| 53 | ||
| 8e7d9af0 | 54 | for (i = 0; i < state_num_regs(); i++) { |
| 4e3ef36b JW |
55 | len += state_dump_reg(http_output_buffer + len, sizeof(http_output_buffer) - len, i); |
| 56 | } | |
| 57 | ||
| 58 | file->len = len; | |
| db9fad13 | 59 | file->data = http_output_buffer; |
| 923ea2c2 JW |
60 | } |
| 61 | ||
| db9fad13 JAW |
62 | #define LEFT (sizeof(http_output_buffer) - len) |
| 63 | ||
| 9343e933 JW |
64 | void handle_backtrace(struct fs_file *file) |
| 65 | { | |
| 9343e933 | 66 | int i = 10; |
| db9fad13 | 67 | int len; |
| 4e3ef36b JW |
68 | void *pebp, *peip; |
| 69 | uint64_t bp, next; | |
| 70 | ||
| 71 | int longmode = (get_operating_mode() == LONG_64BIT); | |
| db9fad13 JAW |
72 | |
| 73 | char * buf = http_output_buffer; | |
| 9343e933 JW |
74 | |
| 75 | strcpy(buf, "<html><head><title>Backtrace</title></head><body><tt><pre>"); | |
| db9fad13 | 76 | len = strlen(buf); |
| 4e3ef36b | 77 | |
| 8e7d9af0 | 78 | bp = state_get_reg(longmode ? STATE_REG_RIP : STATE_REG_EIP); |
| 4e3ef36b JW |
79 | |
| 80 | if (longmode) | |
| 81 | len += snprintf(buf + len, LEFT, "0x%08x%08x, from\n", (uint32_t)(bp >> 32), (uint32_t)bp); | |
| 82 | else | |
| 83 | len += snprintf(buf + len, LEFT, "0x%08x, from\n", (uint32_t)bp); | |
| 9343e933 | 84 | |
| 8e7d9af0 | 85 | bp = state_get_reg(longmode ? STATE_REG_RBP : STATE_REG_EBP); |
| 9343e933 | 86 | |
| 8e7d9af0 JW |
87 | |
| 88 | outputf("Backtrace:"); | |
| 4e3ef36b | 89 | while ((peip = demap(bp+(longmode?8:4))) != 0x0 && i--) |
| 9343e933 | 90 | { |
| 4e3ef36b | 91 | if (longmode) { |
| 8e7d9af0 JW |
92 | uint64_t rip; |
| 93 | rip = *(uint64_t *)peip; | |
| 94 | len += snprintf(buf + len, LEFT, "0x%08x%08x, from\n", (uint32_t)(rip >> 32), (uint32_t)rip); | |
| 4e3ef36b | 95 | } else { |
| 8e7d9af0 | 96 | len += snprintf(buf + len, LEFT, "0x%08x, from\n", *(uint32_t *)peip); |
| 4e3ef36b | 97 | } |
| 8e7d9af0 | 98 | outputf(" EIP: %08x", *(uint32_t *)peip); |
| 4e3ef36b JW |
99 | |
| 100 | pebp = demap(bp); | |
| 8e7d9af0 | 101 | if (!pebp || (bp & 3)) |
| 9343e933 | 102 | { |
| 4e3ef36b | 103 | len += snprintf(buf + len, LEFT, "<unreadable frame>\n"); |
| 9343e933 JW |
104 | break; |
| 105 | } | |
| 8e7d9af0 | 106 | outputf(" *EBP: %08x", *(uint32_t *)pebp); |
| 4e3ef36b JW |
107 | |
| 108 | if (longmode) | |
| 109 | next = *(uint64_t *)pebp; | |
| 110 | else | |
| 111 | next = *(uint32_t *)pebp; | |
| 112 | ||
| 113 | if (bp >= next && next) | |
| 9343e933 | 114 | { |
| 4e3ef36b | 115 | len += snprintf(buf + len, LEFT, "<recursive frame>\n"); |
| 9343e933 JW |
116 | break; |
| 117 | } | |
| 4e3ef36b JW |
118 | |
| 119 | bp = next; | |
| 9343e933 | 120 | } |
| db9fad13 | 121 | |
| 9343e933 | 122 | if (i == -1) |
| db9fad13 | 123 | len += snprintf(buf + len, LEFT, "...\n"); |
| 8e7d9af0 JW |
124 | else if (bp && !peip) |
| 125 | len += snprintf(buf + len, LEFT, "<unreadable fp @ %08x>\n", (uint32_t) bp); | |
| 9343e933 | 126 | else |
| db9fad13 JAW |
127 | len += snprintf(buf + len, LEFT, "<root>"); |
| 128 | ||
| 129 | len += snprintf(buf + len, LEFT, "</pre></tt></body></html>"); | |
| 9343e933 JW |
130 | |
| 131 | file->data = buf; | |
| db9fad13 | 132 | file->len = len; |
| 9343e933 JW |
133 | } |
| 134 | ||
| 923ea2c2 JW |
135 | void handle_reboot(struct fs_file *file) |
| 136 | { | |
| 137 | outb(0xCF9, 0x4); | |
| 138 | file->data = "So long!"; | |
| 139 | file->len = 8; | |
| 6f9272bd JW |
140 | } |
| 141 | ||
| 142 | ||
| 143 | /*-----------------------------------------------------------------------------------*/ | |
| 144 | int | |
| 145 | fs_open(const char *name, struct fs_file *file) | |
| 146 | { | |
| 147 | const struct fsdata_file *f; | |
| 148 | ||
| 149 | /* /registers.html is CGI */ | |
| 150 | if (!strcmp(name, "/registers.html")) | |
| 151 | { | |
| 923ea2c2 JW |
152 | handle_regs(file); |
| 153 | return 1; | |
| 154 | } | |
| 9343e933 JW |
155 | if (!strcmp(name, "/backtrace.html")) |
| 156 | { | |
| 157 | handle_backtrace(file); | |
| 158 | return 1; | |
| 159 | } | |
| 923ea2c2 JW |
160 | if (!strcmp(name, "/reboot")) |
| 161 | { | |
| 162 | handle_reboot(file); | |
| 6f9272bd JW |
163 | return 1; |
| 164 | } | |
| 165 | ||
| 166 | for(f = FS_ROOT; | |
| 167 | f != NULL; | |
| 168 | f = f->next) { | |
| 169 | if (!strcmp(name, (const char*)f->name)) { | |
| 170 | file->data = f->data; | |
| 923ea2c2 | 171 | file->len = f->len-1; |
| 6f9272bd JW |
172 | return 1; |
| 173 | } | |
| 174 | } | |
| 175 | file->data = "You clown..."; | |
| 176 | file->len = 9; | |
| 177 | return 0; | |
| 178 | } | |
| 179 | /*-----------------------------------------------------------------------------------*/ |