X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/923ea2c2cd9df7f02ddcfd8c543f63b76be44660..4753ffd55e1ec5906f80fa4728354d6873ea8f1f:/net/http/fs.c?ds=sidebyside diff --git a/net/http/fs.c b/net/http/fs.c index 54c5bd9..2a63b4d 100644 --- a/net/http/fs.c +++ b/net/http/fs.c @@ -34,37 +34,102 @@ #include "fsdata.h" #include "fsdata.c" #include +#include +#include +#include +#include +#include + +static char http_output_buffer[1280]; /*-----------------------------------------------------------------------------------*/ void handle_regs(struct fs_file *file) { - static unsigned char buf[2048]; + int i; + int len; + + len = snprintf(http_output_buffer, sizeof(http_output_buffer), "
");
+
+  for (i = 0; i < state_num_regs(); i++) {
+    len += state_dump_reg(http_output_buffer + len, sizeof(http_output_buffer) - len, i);
+  }
+
+  file->len = len;
+  file->data = http_output_buffer;
+}
+
+#define LEFT (sizeof(http_output_buffer) - len)
+
+void handle_backtrace(struct fs_file *file)
+{
+  int i = 10;
+  int len;
+  void *pebp, *peip;
+  uint64_t bp, next;
+
+  int longmode = (get_operating_mode() == LONG_64BIT);
+
+  char * buf = http_output_buffer;
+  
+  strcpy(buf, "Backtrace
");
+  len = strlen(buf);
+
+  bp = state_get_reg(longmode ? STATE_REG_RIP : STATE_REG_EIP);
+
+  if (longmode)
+    len += snprintf(buf + len, LEFT, "0x%08x%08x, from\n", (uint32_t)(bp >> 32), (uint32_t)bp);
+  else
+    len += snprintf(buf + len, LEFT, "0x%08x, from\n", (uint32_t)bp);
+  
+  bp = state_get_reg(longmode ? STATE_REG_RBP : STATE_REG_EBP);
   
-  sprintf(buf,
-    "Registers"
-    "
At the time you requested this page, the system's registers were:
"
-    "
"
-    "%%eax: 0x%08x    %%ebx: 0x%08x    %%ecx: 0x%08x    %%edx: 0x%08x\n"
-    "%%ebp: 0x%08x    %%esi: 0x%08x    %%edi: 0x%08x    %%esp: 0x%08x\n"
-    "%%cr0: 0x%08x    %%cr3: 0x%08x    %%eip: 0x%08x    %%eflags: 0x%08x\n"
-    "
",
-    *(unsigned long*)0xAFFD0,
-    *(unsigned long*)0xAFFDC,
-    *(unsigned long*)0xAFFD4,
-    *(unsigned long*)0xAFFD8,
-    *(unsigned long*)0xAFFE4,
-    *(unsigned long*)0xAFFE8,
-    *(unsigned long*)0xAFFEC,
-    *(unsigned long*)0xAFFE0,
-    *(unsigned long*)0xAFFFC,
-    *(unsigned long*)0xAFFF8,
-    *(unsigned long*)0xAFFF0,
-    *(unsigned long*)0xAFFF4);
-    
+
+  outputf("Backtrace:");
+  while ((peip = demap(bp+(longmode?8:4))) != 0x0 && i--)
+  {
+    if (longmode) {
+      uint64_t rip;
+      rip = *(uint64_t *)peip;
+      len += snprintf(buf + len, LEFT, "0x%08x%08x, from\n", (uint32_t)(rip >> 32), (uint32_t)rip);
+    } else {
+      len += snprintf(buf + len, LEFT, "0x%08x, from\n", *(uint32_t *)peip);
+    }
+    outputf("   EIP: %08x", *(uint32_t *)peip);
+
+    pebp = demap(bp);
+    if (!pebp || (bp & 3))
+    {
+      len += snprintf(buf + len, LEFT, "<unreadable frame>\n");
+      break;
+    }
+    outputf("   *EBP: %08x", *(uint32_t *)pebp);
+
+    if (longmode)
+      next = *(uint64_t *)pebp;
+    else
+      next = *(uint32_t *)pebp;
+
+    if (bp >= next && next)
+    {
+      len += snprintf(buf + len, LEFT, "<recursive frame>\n");
+      break;
+    }
+
+    bp = next;
+  }
+
+  if (i == -1)
+    len += snprintf(buf + len, LEFT, "...\n");
+  else if (bp && !peip)
+    len += snprintf(buf + len, LEFT, "<unreadable fp @ %08x>\n", (uint32_t) bp);
+  else
+    len += snprintf(buf + len, LEFT, "<root>");
+
+  len += snprintf(buf + len, LEFT, "
");
   
   file->data = buf;
-  file->len = strlen(buf)-1;
+  file->len = len;
 }
 
 void handle_reboot(struct fs_file *file)
@@ -87,6 +152,11 @@ fs_open(const char *name, struct fs_file *file)
     handle_regs(file);
     return 1;
   }
+  if (!strcmp(name, "/backtrace.html"))
+  {
+    handle_backtrace(file);
+    return 1;
+  }
   if (!strcmp(name, "/reboot"))
   {
     handle_reboot(file);