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Diffstat (limited to 'gdb/win32-nat.c')
-rw-r--r--gdb/win32-nat.c158
1 files changed, 125 insertions, 33 deletions
diff --git a/gdb/win32-nat.c b/gdb/win32-nat.c
index f3fb0a7a970..d6bb27ec533 100644
--- a/gdb/win32-nat.c
+++ b/gdb/win32-nat.c
@@ -1,6 +1,6 @@
/* Target-vector operations for controlling win32 child processes, for GDB.
- Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free
+ Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free
Software Foundation, Inc.
Contributed by Cygnus Solutions, A Red Hat Company.
@@ -124,7 +124,6 @@ static DEBUG_EVENT current_event; /* The current debug event from
static HANDLE current_process_handle; /* Currently executing process */
static thread_info *current_thread; /* Info on currently selected thread */
static DWORD main_thread_id; /* Thread ID of the main thread */
-static pid_t cygwin_pid; /* pid of cygwin process */
/* Counts of things. */
static int exception_count = 0;
@@ -383,7 +382,7 @@ static void
do_child_store_inferior_registers (int r)
{
if (r >= 0)
- deprecated_read_register_gen (r, ((char *) &current_thread->context) + mappings[r]);
+ regcache_collect (r, ((char *) &current_thread->context) + mappings[r]);
else
{
for (r = 0; r < NUM_REGS; r++)
@@ -850,10 +849,10 @@ display_selector (HANDLE thread, DWORD sel)
int base, limit;
printf_filtered ("0x%03lx: ", sel);
if (!info.HighWord.Bits.Pres)
- {
- puts_filtered ("Segment not present\n");
- return 0;
- }
+ {
+ puts_filtered ("Segment not present\n");
+ return 0;
+ }
base = (info.HighWord.Bits.BaseHi << 24) +
(info.HighWord.Bits.BaseMid << 16)
+ info.BaseLow;
@@ -862,46 +861,46 @@ display_selector (HANDLE thread, DWORD sel)
limit = (limit << 12) | 0xfff;
printf_filtered ("base=0x%08x limit=0x%08x", base, limit);
if (info.HighWord.Bits.Default_Big)
- puts_filtered(" 32-bit ");
+ puts_filtered(" 32-bit ");
else
- puts_filtered(" 16-bit ");
+ puts_filtered(" 16-bit ");
switch ((info.HighWord.Bits.Type & 0xf) >> 1)
{
case 0:
- puts_filtered ("Data (Read-Only, Exp-up");
- break;
+ puts_filtered ("Data (Read-Only, Exp-up");
+ break;
case 1:
- puts_filtered ("Data (Read/Write, Exp-up");
- break;
+ puts_filtered ("Data (Read/Write, Exp-up");
+ break;
case 2:
- puts_filtered ("Unused segment (");
- break;
+ puts_filtered ("Unused segment (");
+ break;
case 3:
- puts_filtered ("Data (Read/Write, Exp-down");
- break;
+ puts_filtered ("Data (Read/Write, Exp-down");
+ break;
case 4:
- puts_filtered ("Code (Exec-Only, N.Conf");
- break;
+ puts_filtered ("Code (Exec-Only, N.Conf");
+ break;
case 5:
- puts_filtered ("Code (Exec/Read, N.Conf");
+ puts_filtered ("Code (Exec/Read, N.Conf");
break;
case 6:
- puts_filtered ("Code (Exec-Only, Conf");
+ puts_filtered ("Code (Exec-Only, Conf");
break;
case 7:
- puts_filtered ("Code (Exec/Read, Conf");
+ puts_filtered ("Code (Exec/Read, Conf");
break;
default:
printf_filtered ("Unknown type 0x%x",info.HighWord.Bits.Type);
}
if ((info.HighWord.Bits.Type & 0x1) == 0)
- puts_filtered(", N.Acc");
+ puts_filtered(", N.Acc");
puts_filtered (")\n");
if ((info.HighWord.Bits.Type & 0x10) == 0)
puts_filtered("System selector ");
printf_filtered ("Priviledge level = %d. ", info.HighWord.Bits.Dpl);
if (info.HighWord.Bits.Granularity)
- puts_filtered ("Page granular.\n");
+ puts_filtered ("Page granular.\n");
else
puts_filtered ("Byte granular.\n");
return 1;
@@ -926,22 +925,22 @@ display_selectors (char * args, int from_tty)
puts_filtered ("Selector $cs\n");
display_selector (current_thread->h,
- current_thread->context.SegCs);
+ current_thread->context.SegCs);
puts_filtered ("Selector $ds\n");
display_selector (current_thread->h,
- current_thread->context.SegDs);
+ current_thread->context.SegDs);
puts_filtered ("Selector $es\n");
display_selector (current_thread->h,
- current_thread->context.SegEs);
+ current_thread->context.SegEs);
puts_filtered ("Selector $ss\n");
display_selector (current_thread->h,
- current_thread->context.SegSs);
+ current_thread->context.SegSs);
puts_filtered ("Selector $fs\n");
display_selector (current_thread->h,
current_thread->context.SegFs);
puts_filtered ("Selector $gs\n");
display_selector (current_thread->h,
- current_thread->context.SegGs);
+ current_thread->context.SegGs);
}
else
{
@@ -1374,6 +1373,83 @@ has_detach_ability (void)
return 0;
}
+/* Try to set or remove a user privilege to the current process. Return -1
+ if that fails, the previous setting of that privilege otherwise.
+
+ This code is copied from the Cygwin source code and rearranged to allow
+ dynamically loading of the needed symbols from advapi32 which is only
+ available on NT/2K/XP. */
+static int
+set_process_privilege (const char *privilege, BOOL enable)
+{
+ static HMODULE advapi32 = NULL;
+ static BOOL WINAPI (*OpenProcessToken)(HANDLE, DWORD, PHANDLE);
+ static BOOL WINAPI (*LookupPrivilegeValue)(LPCSTR, LPCSTR, PLUID);
+ static BOOL WINAPI (*AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES,
+ DWORD, PTOKEN_PRIVILEGES, PDWORD);
+
+ HANDLE token_hdl = NULL;
+ LUID restore_priv;
+ TOKEN_PRIVILEGES new_priv, orig_priv;
+ int ret = -1;
+ DWORD size;
+
+ if (GetVersion () >= 0x80000000) /* No security availbale on 9x/Me */
+ return 0;
+
+ if (!advapi32)
+ {
+ if (!(advapi32 = LoadLibrary ("advapi32.dll")))
+ goto out;
+ if (!OpenProcessToken)
+ OpenProcessToken = GetProcAddress (advapi32, "OpenProcessToken");
+ if (!LookupPrivilegeValue)
+ LookupPrivilegeValue = GetProcAddress (advapi32,
+ "LookupPrivilegeValueA");
+ if (!AdjustTokenPrivileges)
+ AdjustTokenPrivileges = GetProcAddress (advapi32,
+ "AdjustTokenPrivileges");
+ if (!OpenProcessToken || !LookupPrivilegeValue || !AdjustTokenPrivileges)
+ {
+ advapi32 = NULL;
+ goto out;
+ }
+ }
+
+ if (!OpenProcessToken (GetCurrentProcess (),
+ TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
+ &token_hdl))
+ goto out;
+
+ if (!LookupPrivilegeValue (NULL, privilege, &restore_priv))
+ goto out;
+
+ new_priv.PrivilegeCount = 1;
+ new_priv.Privileges[0].Luid = restore_priv;
+ new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0;
+
+ if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv,
+ sizeof orig_priv, &orig_priv, &size))
+ goto out;
+#if 0
+ /* Disabled, otherwise every `attach' in an unprivileged user session
+ would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
+ child_attach(). */
+ /* AdjustTokenPrivileges returns TRUE even if the privilege could not
+ be enabled. GetLastError () returns an correct error code, though. */
+ if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED)
+ goto out;
+#endif
+
+ ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0;
+
+out:
+ if (token_hdl)
+ CloseHandle (token_hdl);
+
+ return ret;
+}
+
/* Attach to process PID, then initialize for debugging it. */
static void
child_attach (char *args, int from_tty)
@@ -1384,12 +1460,28 @@ child_attach (char *args, int from_tty)
if (!args)
error_no_arg ("process-id to attach");
- pid = strtoul (args, 0, 0);
+ if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0)
+ {
+ printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
+ printf_unfiltered ("This can cause attach to fail on Windows NT/2K/XP\n");
+ }
+
+ pid = strtoul (args, 0, 0); /* Windows pid */
+
ok = DebugActiveProcess (pid);
saw_create = 0;
if (!ok)
+ {
+ /* Try fall back to Cygwin pid */
+ pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid);
+
+ if (pid > 0)
+ ok = DebugActiveProcess (pid);
+
+ if (!ok)
error ("Can't attach to process.");
+ }
if (has_detach_ability ())
{
@@ -1923,11 +2015,11 @@ _initialize_win32_nat (void)
add_info_alias ("sharedlibrary", "dll", 1);
add_prefix_cmd ("w32", class_info, info_w32_command,
- "Print information specific to Win32 debugging.",
- &info_w32_cmdlist, "info w32 ", 0, &infolist);
+ "Print information specific to Win32 debugging.",
+ &info_w32_cmdlist, "info w32 ", 0, &infolist);
add_cmd ("selector", class_info, display_selectors,
- "Display selectors infos.",
+ "Display selectors infos.",
&info_w32_cmdlist);
add_target (&child_ops);
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