Make the loader a little less verbose.

[netwatch.git] / net / http / fs.c
diff --git a/net/http/fs.c b/net/http/fs.c

index 4fe2c41100c27ec94b60f8665bcb3e5e687d5cab..2a63b4d7c777a7b95505571b4f05bf102f95765f 100644 (file)
--- a/net/http/fs.c
+++ b/net/http/fs.c
@@ -36,35 +36,26 @@
  #include <io.h>
  #include <minilib.h>
  #include <paging.h>
+#include <demap.h>
  #include <output.h>
+#include <state.h>
  
-static char http_output_buffer[1024];
+static char http_output_buffer[1280];
  
  /*-----------------------------------------------------------------------------------*/
  
  void handle_regs(struct fs_file *file)
  {
-  file->len = snprintf(http_output_buffer, sizeof(http_output_buffer),
-    "<html><head><title>Registers</title></head><body>"
-    "<p>At the time you requested this page, the system's registers were:</p>"
-    "<tt><pre>"
-    "%%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"
-    "</pre></tt></body></html>",
-    *(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);
-  
+  int i;
+  int len;
+
+  len = snprintf(http_output_buffer, sizeof(http_output_buffer), "<html><pre>");
+
+  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;
  }
  
@@ -74,40 +65,64 @@ void handle_backtrace(struct fs_file *file)
  {
    int i = 10;
    int len;
-  unsigned long *pebp, *peip;
-  unsigned long ebp;
-  unsigned long cr3;
+  void *pebp, *peip;
+  uint64_t bp, next;
+
+  int longmode = (get_operating_mode() == LONG_64BIT);
  
    char * buf = http_output_buffer;
    
    strcpy(buf, "<html><head><title>Backtrace</title></head><body><tt><pre>");
    len = strlen(buf);
-  ebp = *(unsigned long *)0xAFFE4;
-  cr3 = *(unsigned long *)0xAFFF8;
+
+  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);
    
-  len += snprintf(buf + len, LEFT, "0x%08x, from\n", *(unsigned long*)0xAFFF0);
+  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--)
    {
-    len += snprintf(buf + len, LEFT, "0x%08x, from\n", *peip);
+    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(cr3, ebp);
-    if (!pebp)
+    pebp = demap(bp);
+    if (!pebp || (bp & 3))
      {
-      len += snprintf(buf + len, LEFT, "&lt;unreadable %ebp&gt;\n");
+      len += snprintf(buf + len, LEFT, "&lt;unreadable frame&gt;\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)
      {
-      len += snprintf(buf + len, LEFT, "&lt;recursive %ebp&gt;\n");
+      len += snprintf(buf + len, LEFT, "&lt;recursive frame&gt;\n");
        break;
      }
-    ebp = *pebp;
+
+    bp = next;
    }
  
    if (i == -1)
      len += snprintf(buf + len, LEFT, "...\n");
+  else if (bp && !peip)
+    len += snprintf(buf + len, LEFT, "&lt;unreadable fp @ %08x&gt;\n", (uint32_t) bp);
    else
      len += snprintf(buf + len, LEFT, "&lt;root&gt;");