Registers

X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/9343e9338ddf1015a63a95e4e78bfe659a557b76..4753ffd55e1ec5906f80fa4728354d6873ea8f1f:/net/http/fs.c?ds=sidebyside diff --git a/net/http/fs.c b/net/http/fs.c index cb7a226..2a63b4d 100644 --- a/net/http/fs.c +++ b/net/http/fs.c @@ -36,82 +36,100 @@ #include #include #include +#include #include +#include + +static char http_output_buffer[1280]; /*-----------------------------------------------------------------------------------*/ void handle_regs(struct fs_file *file) { - static unsigned char buf[2048]; - - 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); - - - file->data = buf; - file->len = strlen(buf)-1; + 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)
 {
-  static unsigned char buf[2048];
-  static unsigned char buf2[64];
   int i = 10;
-  unsigned long *pebp, *peip;
-  unsigned long ebp;
-  unsigned long cr3;
+  int len;
+  void *pebp, *peip;
+  uint64_t bp, next;
+
+  int longmode = (get_operating_mode() == LONG_64BIT);
+
+  char * buf = http_output_buffer;
   
   strcpy(buf, "Backtrace");
-  ebp = *(unsigned long *)0xAFFE4;
-  cr3 = *(unsigned long *)0xAFFF8;
+  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);
   
-  sprintf(buf2, "0x%08x, from\n", *(unsigned long*)0xAFFF0);
-  strcat(buf, buf2);
+  bp = state_get_reg(longmode ? STATE_REG_RBP : STATE_REG_EBP);
   
-  /* I never thought I'd do this again. */
-  while ((peip = demap(cr3, ebp+4)) != 0x0 && i--)
+
+  outputf("Backtrace:");
+  while ((peip = demap(bp+(longmode?8:4))) != 0x0 && i--)
   {
-    sprintf(buf2, "0x%08x, from\n", *peip);
-    strcat(buf, buf2);
-    pebp = demap(cr3, ebp);
-    if (!pebp)
+    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))
     {
-      strcat(buf, "<unreadable %ebp>\n");
+      len += snprintf(buf + len, LEFT, "<unreadable frame>\n");
       break;
     }
-    if (ebp >= *pebp && *pebp)
+    outputf("   *EBP: %08x", *(uint32_t *)pebp);
+
+    if (longmode)
+      next = *(uint64_t *)pebp;
+    else
+      next = *(uint32_t *)pebp;
+
+    if (bp >= next && next)
     {
-      strcat(buf, "<recursive %ebp>\n");
+      len += snprintf(buf + len, LEFT, "<recursive frame>\n");
       break;
     }
-    ebp = *pebp;
+
+    bp = next;
   }
+
   if (i == -1)
-    strcat(buf, "...\n");
+    len += snprintf(buf + len, LEFT, "...\n");
+  else if (bp && !peip)
+    len += snprintf(buf + len, LEFT, "<unreadable fp @ %08x>\n", (uint32_t) bp);
   else
-    strcat(buf, "<root>");
-  strcat(buf, "");
+    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)