update to ida 7.6, add builds

idasdk76/dbg/linux/linuxbase_debmod.cpp

@@ -0,0 +1,146 @@
+#include <fpro.h>
+#include <prodir.h>
+#include <diskio.hpp>
+#include "linuxbase_debmod.h"
+
+//--------------------------------------------------------------------------
+static inline const char *str_bitness(int bitness)
+{
+  switch ( bitness )
+  {
+    case 8:
+      return "[64]";
+    case 4:
+      return "[32]";
+    default:
+      return "[x]";
+  }
+}
+
+//--------------------------------------------------------------------------
+static void build_process_ext_name(ext_process_info_t *pinfo)
+{
+  pinfo->ext_name = str_bitness(pinfo->addrsize);
+
+  char buf[QMAXPATH];
+  qsnprintf(buf, sizeof(buf), "/proc/%u/cmdline", pinfo->pid);
+
+  FILE *cmdfp = qfopen(buf, "r");
+  if ( cmdfp == nullptr )
+    return;
+
+  int size = qfread(cmdfp, buf, sizeof(buf));
+  buf[size] = '\0';
+  qfclose(cmdfp);
+
+#ifdef __ANDROID__
+  while ( size >= 0 && buf[size] == '\0' )
+    size--;
+  size++;
+#endif
+
+  // arguments are separated by '\0'
+  for ( int i=0; i < size; )
+  {
+    const char *in = &buf[i];
+    qstring arg = in;
+    quote_cmdline_arg(&arg);
+    pinfo->ext_name.append(" ");
+    pinfo->ext_name.append(arg);
+
+    i += strlen(in) + 1;
+  }
+}
+
+//--------------------------------------------------------------------------
+// Returns the file name assciated with pid
+bool idaapi linuxbase_debmod_t::get_exec_fname(
+        int _pid,
+        char *buf,
+        size_t bufsize)
+{
+  char path[QMAXPATH];
+  qsnprintf(path, sizeof(path), "/proc/%u/exe", _pid);
+  int len = readlink(path, buf, bufsize-1);
+  if ( len > 0 )
+  {
+    buf[len] = '\0';
+    return true;
+  }
+  else
+  {
+    // ESXi keeps the real file name inside /proc/PID/exe (which is not a link)
+    FILE *fp = qfopen(path, "r");
+    if ( fp != NULL )
+    {
+      len = qfread(fp, buf, bufsize);
+      qfclose(fp);
+      if ( len > 1 && len < bufsize && buf[0] == '/' ) // sanity check
+      {
+        buf[len] = '\0';
+        return true;
+      }
+    }
+    buf[0] = '\0';
+    return false;
+  }
+}
+
+//--------------------------------------------------------------------------
+// Get process bitness: 32bit - 4, 64bit - 8, 0 - unknown
+int idaapi linuxbase_debmod_t::get_process_bitness(int _pid)
+{
+  char fname[QMAXPATH];
+  qsnprintf(fname, sizeof(fname), "/proc/%u/maps", _pid);
+  FILE *mapfp = fopenRT(fname);
+  if ( mapfp == NULL )
+    return 0;
+
+  int bitness = 4;
+  qstring line;
+  while ( qgetline(&line, mapfp) >= 0 )
+  {
+    if ( line.empty() )
+      continue;
+    ea_t ea1;
+    ea_t ea2;
+    if ( qsscanf(line.begin(), "%a-%a ", &ea1, &ea2) == 2 )
+    {
+      size_t pos = line.find('-');
+      if ( pos != qstring::npos && pos > 8 )
+      {
+        bitness = 8;
+        break;
+      }
+    }
+  }
+  qfclose(mapfp);
+  return bitness;
+}
+
+//--------------------------------------------------------------------------
+int idaapi linuxbase_debmod_t::get_process_list(procvec_t *list, qstring *)
+{
+  int mypid = getpid();
+  list->clear();
+  qffblk64_t fb;
+  for ( int code = qfindfirst("/proc/*", &fb, FA_DIREC);
+        code == 0;
+        code = qfindnext(&fb) )
+  {
+    if ( !qisdigit(fb.ff_name[0]) )
+      continue;
+    ext_process_info_t pinfo;
+    pinfo.pid = atoi(fb.ff_name);
+    if ( pinfo.pid == mypid )
+      continue;
+    char buf[MAXSTR];
+    if ( !get_exec_fname(pinfo.pid, buf, sizeof(buf)) )
+      continue; // we skip the process because we cannot debug it anyway
+    pinfo.name = buf;
+    pinfo.addrsize = get_process_bitness(pinfo.pid);
+    build_process_ext_name(&pinfo);
+    list->push_back(pinfo);
+  }
+  return list->size();
+}