+void handle_backtrace(struct fs_file *file)
+{
+ static char buf[2048];
+ static char buf2[64];
+ int i = 10;
+ unsigned long *pebp, *peip;
+ unsigned long ebp;
+ unsigned long cr3;
+
+ strcpy(buf, "<html><head><title>Backtrace</title></head><body><tt><pre>");
+ ebp = *(unsigned long *)0xAFFE4;
+ cr3 = *(unsigned long *)0xAFFF8;
+
+ sprintf(buf2, "0x%08x, from\n", *(unsigned long*)0xAFFF0);
+ strcat(buf, buf2);
+
+ /* I never thought I'd do this again. */
+ while ((peip = demap(cr3, ebp+4)) != 0x0 && i--)
+ {
+ sprintf(buf2, "0x%08x, from\n", *peip);
+ strcat(buf, buf2);
+ pebp = demap(cr3, ebp);
+ if (!pebp)
+ {
+ strcat(buf, "<unreadable %ebp>\n");
+ break;
+ }
+ if (ebp >= *pebp && *pebp)
+ {
+ strcat(buf, "<recursive %ebp>\n");
+ break;
+ }
+ ebp = *pebp;
+ }
+ if (i == -1)
+ strcat(buf, "...\n");
+ else
+ strcat(buf, "<root>");
+ strcat(buf, "</pre></tt></body></html>");
+
+ file->data = buf;
+ file->len = strlen(buf)-1;
+}
+