Joshua Wise's Git repositories - netwatch.git/blame_incremental

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Commit	Line	Data
	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"
	36	#include <io.h>
	37	#include <minilib.h>
	38	#include <paging.h>
	39	#include <output.h>
	40
	41	static char http_output_buffer[1024];
	42
	43	/-----------------------------------------------------------------------------------/
	44
	45	void handle_regs(struct fs_file *file)
	46	{
	47	file->len = snprintf(http_output_buffer, sizeof(http_output_buffer),
	48	"<html><head><title>Registers</title></head><body>"
	49	"<p>At the time you requested this page, the system's registers were:</p>"
	50	"<tt><pre>"
	51	"%%eax: 0x%08x %%ebx: 0x%08x %%ecx: 0x%08x %%edx: 0x%08x\n"
	52	"%%ebp: 0x%08x %%esi: 0x%08x %%edi: 0x%08x %%esp: 0x%08x\n"
	53	"%%cr0: 0x%08x %%cr3: 0x%08x %%eip: 0x%08x %%eflags: 0x%08x\n"
	54	"</pre></tt></body></html>",
	55	(unsigned long)0xAFFD0,
	56	(unsigned long)0xAFFDC,
	57	(unsigned long)0xAFFD4,
	58	(unsigned long)0xAFFD8,
	59	(unsigned long)0xAFFE4,
	60	(unsigned long)0xAFFE8,
	61	(unsigned long)0xAFFEC,
	62	(unsigned long)0xAFFE0,
	63	(unsigned long)0xAFFFC,
	64	(unsigned long)0xAFFF8,
	65	(unsigned long)0xAFFF0,
	66	(unsigned long)0xAFFF4);
	67
	68	file->data = http_output_buffer;
	69	}
	70
	71	#define LEFT (sizeof(http_output_buffer) - len)
	72
	73	void handle_backtrace(struct fs_file *file)
	74	{
	75	int i = 10;
	76	int len;
	77	unsigned long pebp, peip;
	78	unsigned long ebp;
	79	unsigned long cr3;
	80
	81	char * buf = http_output_buffer;
	82
	83	strcpy(buf, "<html><head><title>Backtrace</title></head><body><tt><pre>");
	84	len = strlen(buf);
	85	ebp = (unsigned long )0xAFFE4;
	86	cr3 = (unsigned long )0xAFFF8;
	87
	88	len += snprintf(buf + len, LEFT, "0x%08x, from\n", (unsigned long)0xAFFF0);
	89
	90	/* I never thought I'd do this again. */
	91	while ((peip = demap(cr3, ebp+4)) != 0x0 && i--)
	92	{
	93	len += snprintf(buf + len, LEFT, "0x%08x, from\n", *peip);
	94
	95	pebp = demap(cr3, ebp);
	96	if (!pebp)
	97	{
	98	len += snprintf(buf + len, LEFT, "<unreadable %ebp>\n");
	99	break;
	100	}
	101	if (ebp >= pebp && pebp)
	102	{
	103	len += snprintf(buf + len, LEFT, "<recursive %ebp>\n");
	104	break;
	105	}
	106	ebp = *pebp;
	107	}
	108
	109	if (i == -1)
	110	len += snprintf(buf + len, LEFT, "...\n");
	111	else
	112	len += snprintf(buf + len, LEFT, "<root>");
	113
	114	len += snprintf(buf + len, LEFT, "</pre></tt></body></html>");
	115
	116	file->data = buf;
	117	file->len = len;
	118	}
	119
	120	void handle_reboot(struct fs_file *file)
	121	{
	122	outb(0xCF9, 0x4);
	123	file->data = "So long!";
	124	file->len = 8;
	125	}
	126
	127
	128	/-----------------------------------------------------------------------------------/
	129	int
	130	fs_open(const char name, struct fs_file file)
	131	{
	132	const struct fsdata_file *f;
	133
	134	/* /registers.html is CGI */
	135	if (!strcmp(name, "/registers.html"))
	136	{
	137	handle_regs(file);
	138	return 1;
	139	}
	140	if (!strcmp(name, "/backtrace.html"))
	141	{
	142	handle_backtrace(file);
	143	return 1;
	144	}
	145	if (!strcmp(name, "/reboot"))
	146	{
	147	handle_reboot(file);
	148	return 1;
	149	}
	150
	151	for(f = FS_ROOT;
	152	f != NULL;
	153	f = f->next) {
	154	if (!strcmp(name, (const char*)f->name)) {
	155	file->data = f->data;
	156	file->len = f->len-1;
	157	return 1;
	158	}
	159	}
	160	file->data = "You clown...";
	161	file->len = 9;
	162	return 0;
	163	}
	164	/-----------------------------------------------------------------------------------/