diff options
Diffstat (limited to 'gdb/windows-nat.c')
| -rw-r--r-- | gdb/windows-nat.c | 2204 |
1 files changed, 0 insertions, 2204 deletions
diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c deleted file mode 100644 index ddbcd0b0500..00000000000 --- a/gdb/windows-nat.c +++ /dev/null @@ -1,2204 +0,0 @@ -/* Target-vector operations for controlling win32 child processes, for GDB. - - Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free - Software Foundation, Inc. - - Contributed by Cygnus Solutions, A Red Hat Company. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without eve nthe implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* Originally by Steve Chamberlain, sac@cygnus.com */ - -/* We assume we're being built with and will be used for cygwin. */ - -#include "defs.h" -#include "tm.h" /* required for SSE registers */ -#include "frame.h" /* required by inferior.h */ -#include "inferior.h" -#include "target.h" -#include "gdbcore.h" -#include "command.h" -#include "completer.h" -#include "regcache.h" -#include "top.h" -#include "i386-tdep.h" -#include <signal.h> -#include <sys/types.h> -#include <fcntl.h> -#include <stdlib.h> -#include <windows.h> -#include <imagehlp.h> -#include <sys/cygwin.h> - -#include "buildsym.h" -#include "symfile.h" -#include "objfiles.h" -#include "gdb_string.h" -#include "gdbthread.h" -#include "gdbcmd.h" -#include <sys/param.h> -#include <unistd.h> - -/* The ui's event loop. */ -extern int (*ui_loop_hook) (int signo); - -/* If we're not using the old Cygwin header file set, define the - following which never should have been in the generic Win32 API - headers in the first place since they were our own invention... */ -#ifndef _GNU_H_WINDOWS_H -enum - { - FLAG_TRACE_BIT = 0x100, - CONTEXT_DEBUGGER = (CONTEXT_FULL | CONTEXT_FLOATING_POINT) - }; -#endif -#include <sys/procfs.h> -#include <psapi.h> - -#ifdef HAVE_SSE_REGS -#define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \ - | CONTEXT_EXTENDED_REGISTERS -#else -#define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS -#endif - -static unsigned dr[8]; -static int debug_registers_changed = 0; -static int debug_registers_used = 0; - -/* The string sent by cygwin when it processes a signal. - FIXME: This should be in a cygwin include file. */ -#define CYGWIN_SIGNAL_STRING "cygwin: signal" - -#define CHECK(x) check (x, __FILE__,__LINE__) -#define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x -#define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x -#define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x -#define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x - -/* Forward declaration */ -extern struct target_ops child_ops; - -static void child_stop (void); -static int win32_child_thread_alive (ptid_t); -void child_kill_inferior (void); - -static enum target_signal last_sig = TARGET_SIGNAL_0; -/* Set if a signal was received from the debugged process */ - -/* Thread information structure used to track information that is - not available in gdb's thread structure. */ -typedef struct thread_info_struct - { - struct thread_info_struct *next; - DWORD id; - HANDLE h; - char *name; - int suspend_count; - CONTEXT context; - STACKFRAME sf; - } -thread_info; - -static thread_info thread_head; - -/* The process and thread handles for the above context. */ - -static DEBUG_EVENT current_event; /* The current debug event from - WaitForDebugEvent */ -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 */ - -/* Counts of things. */ -static int exception_count = 0; -static int event_count = 0; -static int saw_create; - -/* User options. */ -static int new_console = 0; -static int new_group = 1; -static int debug_exec = 0; /* show execution */ -static int debug_events = 0; /* show events from kernel */ -static int debug_memory = 0; /* show target memory accesses */ -static int debug_exceptions = 0; /* show target exceptions */ -static int useshell = 0; /* use shell for subprocesses */ - -/* Path to shell */ -static char shell[MAX_PATH + 1]; - -/* This vector maps GDB's idea of a register's number into an address - in the win32 exception context vector. - - It also contains the bit mask needed to load the register in question. - - One day we could read a reg, we could inspect the context we - already have loaded, if it doesn't have the bit set that we need, - we read that set of registers in using GetThreadContext. If the - context already contains what we need, we just unpack it. Then to - write a register, first we have to ensure that the context contains - the other regs of the group, and then we copy the info in and set - out bit. */ - -#define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) -static const int mappings[] = -{ - context_offset (Eax), - context_offset (Ecx), - context_offset (Edx), - context_offset (Ebx), - context_offset (Esp), - context_offset (Ebp), - context_offset (Esi), - context_offset (Edi), - context_offset (Eip), - context_offset (EFlags), - context_offset (SegCs), - context_offset (SegSs), - context_offset (SegDs), - context_offset (SegEs), - context_offset (SegFs), - context_offset (SegGs), - context_offset (FloatSave.RegisterArea[0 * 10]), - context_offset (FloatSave.RegisterArea[1 * 10]), - context_offset (FloatSave.RegisterArea[2 * 10]), - context_offset (FloatSave.RegisterArea[3 * 10]), - context_offset (FloatSave.RegisterArea[4 * 10]), - context_offset (FloatSave.RegisterArea[5 * 10]), - context_offset (FloatSave.RegisterArea[6 * 10]), - context_offset (FloatSave.RegisterArea[7 * 10]), - context_offset (FloatSave.ControlWord), - context_offset (FloatSave.StatusWord), - context_offset (FloatSave.TagWord), - context_offset (FloatSave.ErrorSelector), - context_offset (FloatSave.ErrorOffset), - context_offset (FloatSave.DataSelector), - context_offset (FloatSave.DataOffset), - context_offset (FloatSave.ErrorSelector) -#ifdef HAVE_SSE_REGS - /* XMM0-7 */ , - context_offset (ExtendedRegisters[10*16]), - context_offset (ExtendedRegisters[11*16]), - context_offset (ExtendedRegisters[12*16]), - context_offset (ExtendedRegisters[13*16]), - context_offset (ExtendedRegisters[14*16]), - context_offset (ExtendedRegisters[15*16]), - context_offset (ExtendedRegisters[16*16]), - context_offset (ExtendedRegisters[17*16]), - /* MXCSR */ - context_offset (ExtendedRegisters[24]) -#endif -}; - -#undef context_offset - -/* This vector maps the target's idea of an exception (extracted - from the DEBUG_EVENT structure) to GDB's idea. */ - -struct xlate_exception - { - int them; - enum target_signal us; - }; - -static const struct xlate_exception - xlate[] = -{ - {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV}, - {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV}, - {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP}, - {DBG_CONTROL_C, TARGET_SIGNAL_INT}, - {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP}, - {STATUS_FLOAT_DIVIDE_BY_ZERO, TARGET_SIGNAL_FPE}, - {-1, -1}}; - -static void -check (BOOL ok, const char *file, int line) -{ - if (!ok) - printf_filtered ("error return %s:%d was %lu\n", file, line, - GetLastError ()); -} - - -/* Find a thread record given a thread id. - If get_context then also retrieve the context for this - thread. */ -static thread_info * -thread_rec (DWORD id, int get_context) -{ - thread_info *th; - - for (th = &thread_head; (th = th->next) != NULL;) - if (th->id == id) - { - if (!th->suspend_count && get_context) - { - if (get_context > 0 && id != current_event.dwThreadId) - th->suspend_count = SuspendThread (th->h) + 1; - else if (get_context < 0) - th->suspend_count = -1; - - th->context.ContextFlags = CONTEXT_DEBUGGER_DR; - GetThreadContext (th->h, &th->context); - if (id == current_event.dwThreadId) - { - /* Copy dr values from that thread. */ - dr[0] = th->context.Dr0; - dr[1] = th->context.Dr1; - dr[2] = th->context.Dr2; - dr[3] = th->context.Dr3; - dr[6] = th->context.Dr6; - dr[7] = th->context.Dr7; - } - } - return th; - } - - return NULL; -} - -/* Add a thread to the thread list */ -static thread_info * -child_add_thread (DWORD id, HANDLE h) -{ - thread_info *th; - - if ((th = thread_rec (id, FALSE))) - return th; - - th = (thread_info *) xmalloc (sizeof (*th)); - memset (th, 0, sizeof (*th)); - th->id = id; - th->h = h; - th->next = thread_head.next; - thread_head.next = th; - add_thread (pid_to_ptid (id)); - /* Set the debug registers for the new thread in they are used. */ - if (debug_registers_used) - { - /* Only change the value of the debug registers. */ - th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; - CHECK (GetThreadContext (th->h, &th->context)); - th->context.Dr0 = dr[0]; - th->context.Dr1 = dr[1]; - th->context.Dr2 = dr[2]; - th->context.Dr3 = dr[3]; - /* th->context.Dr6 = dr[6]; - FIXME: should we set dr6 also ?? */ - th->context.Dr7 = dr[7]; - CHECK (SetThreadContext (th->h, &th->context)); - th->context.ContextFlags = 0; - } - return th; -} - -/* Clear out any old thread list and reintialize it to a - pristine state. */ -static void -child_init_thread_list (void) -{ - thread_info *th = &thread_head; - - DEBUG_EVENTS (("gdb: child_init_thread_list\n")); - init_thread_list (); - while (th->next != NULL) - { - thread_info *here = th->next; - th->next = here->next; - (void) CloseHandle (here->h); - xfree (here); - } -} - -/* Delete a thread from the list of threads */ -static void -child_delete_thread (DWORD id) -{ - thread_info *th; - - if (info_verbose) - printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (pid_to_ptid (id))); - delete_thread (pid_to_ptid (id)); - - for (th = &thread_head; - th->next != NULL && th->next->id != id; - th = th->next) - continue; - - if (th->next != NULL) - { - thread_info *here = th->next; - th->next = here->next; - CloseHandle (here->h); - xfree (here); - } -} - -static void -do_child_fetch_inferior_registers (int r) -{ - char *context_offset = ((char *) ¤t_thread->context) + mappings[r]; - long l; - if (r == FCS_REGNUM) - { - l = *((long *) context_offset) & 0xffff; - supply_register (r, (char *) &l); - } - else if (r == FOP_REGNUM) - { - l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); - supply_register (r, (char *) &l); - } - else if (r >= 0) - supply_register (r, context_offset); - else - { - for (r = 0; r < NUM_REGS; r++) - do_child_fetch_inferior_registers (r); - } -} - -static void -child_fetch_inferior_registers (int r) -{ - current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); - do_child_fetch_inferior_registers (r); -} - -static void -do_child_store_inferior_registers (int r) -{ - if (r >= 0) - read_register_gen (r, ((char *) ¤t_thread->context) + mappings[r]); - else - { - for (r = 0; r < NUM_REGS; r++) - do_child_store_inferior_registers (r); - } -} - -/* Store a new register value into the current thread context */ -static void -child_store_inferior_registers (int r) -{ - current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); - do_child_store_inferior_registers (r); -} - -static int psapi_loaded = 0; -static HMODULE psapi_module_handle = NULL; -static BOOL WINAPI (*psapi_EnumProcessModules) (HANDLE, HMODULE *, DWORD, LPDWORD) = NULL; -static BOOL WINAPI (*psapi_GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO, DWORD) = NULL; -static DWORD WINAPI (*psapi_GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR, DWORD) = NULL; - -int -psapi_get_dll_name (DWORD BaseAddress, char *dll_name_ret) -{ - DWORD len; - MODULEINFO mi; - int i; - HMODULE dh_buf[1]; - HMODULE *DllHandle = dh_buf; - DWORD cbNeeded; - BOOL ok; - - if (!psapi_loaded || - psapi_EnumProcessModules == NULL || - psapi_GetModuleInformation == NULL || - psapi_GetModuleFileNameExA == NULL) - { - if (psapi_loaded) - goto failed; - psapi_loaded = 1; - psapi_module_handle = LoadLibrary ("psapi.dll"); - if (!psapi_module_handle) - { - /* printf_unfiltered ("error loading psapi.dll: %u", GetLastError ()); */ - goto failed; - } - psapi_EnumProcessModules = GetProcAddress (psapi_module_handle, "EnumProcessModules"); - psapi_GetModuleInformation = GetProcAddress (psapi_module_handle, "GetModuleInformation"); - psapi_GetModuleFileNameExA = (void *) GetProcAddress (psapi_module_handle, - "GetModuleFileNameExA"); - if (psapi_EnumProcessModules == NULL || - psapi_GetModuleInformation == NULL || - psapi_GetModuleFileNameExA == NULL) - goto failed; - } - - cbNeeded = 0; - ok = (*psapi_EnumProcessModules) (current_process_handle, - DllHandle, - sizeof (HMODULE), - &cbNeeded); - - if (!ok || !cbNeeded) - goto failed; - - DllHandle = (HMODULE *) alloca (cbNeeded); - if (!DllHandle) - goto failed; - - ok = (*psapi_EnumProcessModules) (current_process_handle, - DllHandle, - cbNeeded, - &cbNeeded); - if (!ok) - goto failed; - - for (i = 0; i < (int) (cbNeeded / sizeof (HMODULE)); i++) - { - if (!(*psapi_GetModuleInformation) (current_process_handle, - DllHandle[i], - &mi, - sizeof (mi))) - error ("Can't get module info"); - - len = (*psapi_GetModuleFileNameExA) (current_process_handle, - DllHandle[i], - dll_name_ret, - MAX_PATH); - if (len == 0) - error ("Error getting dll name: %u\n", GetLastError ()); - - if ((DWORD) (mi.lpBaseOfDll) == BaseAddress) - return 1; - } - -failed: - dll_name_ret[0] = '\0'; - return 0; -} - -/* Encapsulate the information required in a call to - symbol_file_add_args */ -struct safe_symbol_file_add_args -{ - char *name; - int from_tty; - struct section_addr_info *addrs; - int mainline; - int flags; - struct ui_file *err, *out; - struct objfile *ret; -}; - -/* Maintain a linked list of "so" information. */ -struct so_stuff -{ - struct so_stuff *next; - DWORD load_addr; - int loaded; - struct objfile *objfile; - char name[1]; -} solib_start, *solib_end; - -/* Call symbol_file_add with stderr redirected. We don't care if there - are errors. */ -static int -safe_symbol_file_add_stub (void *argv) -{ -#define p ((struct safe_symbol_file_add_args *)argv) - struct so_stuff *so = &solib_start; - - while ((so = so->next)) - if (so->loaded && strcasecmp (so->name, p->name) == 0) - return 0; - p->ret = symbol_file_add (p->name, p->from_tty, p->addrs, p->mainline, p->flags); - return !!p->ret; -#undef p -} - -/* Restore gdb's stderr after calling symbol_file_add */ -static void -safe_symbol_file_add_cleanup (void *p) -{ -#define sp ((struct safe_symbol_file_add_args *)p) - gdb_flush (gdb_stderr); - gdb_flush (gdb_stdout); - ui_file_delete (gdb_stderr); - ui_file_delete (gdb_stdout); - gdb_stderr = sp->err; - gdb_stdout = sp->out; -#undef sp -} - -/* symbol_file_add wrapper that prevents errors from being displayed. */ -static struct objfile * -safe_symbol_file_add (char *name, int from_tty, - struct section_addr_info *addrs, - int mainline, int flags) -{ - struct safe_symbol_file_add_args p; - struct cleanup *cleanup; - - cleanup = make_cleanup (safe_symbol_file_add_cleanup, &p); - - p.err = gdb_stderr; - p.out = gdb_stdout; - gdb_flush (gdb_stderr); - gdb_flush (gdb_stdout); - gdb_stderr = ui_file_new (); - gdb_stdout = ui_file_new (); - p.name = name; - p.from_tty = from_tty; - p.addrs = addrs; - p.mainline = mainline; - p.flags = flags; - catch_errors (safe_symbol_file_add_stub, &p, "", RETURN_MASK_ERROR); - - do_cleanups (cleanup); - return p.ret; -} - -/* Remember the maximum DLL length for printing in info dll command. */ -int max_dll_name_len; - -static void -register_loaded_dll (const char *name, DWORD load_addr) -{ - struct so_stuff *so; - char ppath[MAX_PATH + 1]; - char buf[MAX_PATH + 1]; - char cwd[MAX_PATH + 1]; - char *p; - WIN32_FIND_DATA w32_fd; - HANDLE h = FindFirstFile(name, &w32_fd); - size_t len; - - if (h == INVALID_HANDLE_VALUE) - strcpy (buf, name); - else - { - FindClose (h); - strcpy (buf, name); - if (GetCurrentDirectory (MAX_PATH + 1, cwd)) - { - p = strrchr (buf, '\\'); - if (p) - p[1] = '\0'; - SetCurrentDirectory (buf); - GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p); - SetCurrentDirectory (cwd); - } - } - - cygwin_conv_to_posix_path (buf, ppath); - so = (struct so_stuff *) xmalloc (sizeof (struct so_stuff) + strlen (ppath) + 8 + 1); - so->loaded = 0; - so->load_addr = load_addr; - so->next = NULL; - so->objfile = NULL; - strcpy (so->name, ppath); - - solib_end->next = so; - solib_end = so; - len = strlen (ppath); - if (len > max_dll_name_len) - max_dll_name_len = len; -} - -char * -get_image_name (HANDLE h, void *address, int unicode) -{ - static char buf[(2 * MAX_PATH) + 1]; - DWORD size = unicode ? sizeof (WCHAR) : sizeof (char); - char *address_ptr; - int len = 0; - char b[2]; - DWORD done; - - /* Attempt to read the name of the dll that was detected. - This is documented to work only when actively debugging - a program. It will not work for attached processes. */ - if (address == NULL) - return NULL; - - ReadProcessMemory (h, address, &address_ptr, sizeof (address_ptr), &done); - - /* See if we could read the address of a string, and that the - address isn't null. */ - - if (done != sizeof (address_ptr) || !address_ptr) - return NULL; - - /* Find the length of the string */ - do - { - ReadProcessMemory (h, address_ptr + len * size, &b, size, &done); - len++; - } - while ((b[0] != 0 || b[size - 1] != 0) && done == size); - - if (!unicode) - ReadProcessMemory (h, address_ptr, buf, len, &done); - else - { - WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR)); - ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR), - &done); - - WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, len, 0, 0); - } - - return buf; -} - -/* Wait for child to do something. Return pid of child, or -1 in case - of error; store status through argument pointer OURSTATUS. */ -static int -handle_load_dll (void *dummy) -{ - LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; - char dll_buf[MAX_PATH + 1]; - char *dll_name = NULL; - char *p; - - dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; - - if (!psapi_get_dll_name ((DWORD) (event->lpBaseOfDll), dll_buf)) - dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; - - dll_name = dll_buf; - - if (*dll_name == '\0') - dll_name = get_image_name (current_process_handle, event->lpImageName, event->fUnicode); - if (!dll_name) - return 1; - - register_loaded_dll (dll_name, (DWORD) event->lpBaseOfDll + 0x1000); - - return 1; -} - -static int -handle_unload_dll (void *dummy) -{ - DWORD lpBaseOfDll = (DWORD) current_event.u.UnloadDll.lpBaseOfDll + 0x1000; - struct so_stuff *so; - - for (so = &solib_start; so->next != NULL; so = so->next) - if (so->next->load_addr == lpBaseOfDll) - { - struct so_stuff *sodel = so->next; - so->next = sodel->next; - if (!so->next) - solib_end = so; - if (sodel->objfile) - free_objfile (sodel->objfile); - xfree(sodel); - return 1; - } - error ("Error: dll starting at 0x%lx not found.\n", (DWORD) lpBaseOfDll); - - return 0; -} - -/* Return name of last loaded DLL. */ -char * -child_solib_loaded_library_pathname (int pid) -{ - return !solib_end || !solib_end->name[0] ? NULL : solib_end->name; -} - -/* Clear list of loaded DLLs. */ -void -child_clear_solibs (void) -{ - struct so_stuff *so, *so1 = solib_start.next; - - while ((so = so1) != NULL) - { - so1 = so->next; - xfree (so); - } - - solib_start.next = NULL; - solib_start.objfile = NULL; - solib_end = &solib_start; - max_dll_name_len = sizeof ("DLL Name") - 1; -} - -/* Add DLL symbol information. */ -static struct objfile * -solib_symbols_add (char *name, int from_tty, CORE_ADDR load_addr) -{ - struct section_addr_info section_addrs; - - /* The symbols in a dll are offset by 0x1000, which is the - the offset from 0 of the first byte in an image - because - of the file header and the section alignment. */ - - if (!name || !name[0]) - return NULL; - - memset (§ion_addrs, 0, sizeof (section_addrs)); - section_addrs.other[0].name = ".text"; - section_addrs.other[0].addr = load_addr; - return safe_symbol_file_add (name, from_tty, NULL, 0, OBJF_SHARED); -} - -/* Load DLL symbol info. */ -void -dll_symbol_command (char *args, int from_tty) -{ - int n; - dont_repeat (); - - if (args == NULL) - error ("dll-symbols requires a file name"); - - n = strlen (args); - if (n > 4 && strcasecmp (args + n - 4, ".dll") != 0) - { - char *newargs = (char *) alloca (n + 4 + 1); - strcpy (newargs, args); - strcat (newargs, ".dll"); - args = newargs; - } - - safe_symbol_file_add (args, from_tty, NULL, 0, OBJF_SHARED | OBJF_USERLOADED); -} - -/* List currently loaded DLLs. */ -void -info_dll_command (char *ignore, int from_tty) -{ - struct so_stuff *so = &solib_start; - - if (!so->next) - return; - - printf_filtered ("%*s Load Address\n", -max_dll_name_len, "DLL Name"); - while ((so = so->next) != NULL) - printf_filtered ("%*s %08lx\n", -max_dll_name_len, so->name, so->load_addr); - - return; -} - -/* Handle DEBUG_STRING output from child process. - Cygwin prepends its messages with a "cygwin:". Interpret this as - a Cygwin signal. Otherwise just print the string as a warning. */ -static int -handle_output_debug_string (struct target_waitstatus *ourstatus) -{ - char *s; - int gotasig = FALSE; - - if (!target_read_string - ((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0) - || !s || !*s) - return gotasig; - - if (strncmp (s, CYGWIN_SIGNAL_STRING, sizeof (CYGWIN_SIGNAL_STRING) - 1) != 0) - { - if (strncmp (s, "cYg", 3) != 0) - warning ("%s", s); - } - else - { - char *p; - int sig = strtol (s + sizeof (CYGWIN_SIGNAL_STRING) - 1, &p, 0); - gotasig = target_signal_from_host (sig); - ourstatus->value.sig = gotasig; - if (gotasig) - ourstatus->kind = TARGET_WAITKIND_STOPPED; - } - - xfree (s); - return gotasig; -} - -static int -display_selector (HANDLE thread, DWORD sel) -{ - LDT_ENTRY info; - if (GetThreadSelectorEntry (thread, sel, &info)) - { - int base, limit; - printf_filtered ("0x%03lx: ", sel); - if (!info.HighWord.Bits.Pres) - { - puts_filtered ("Segment not present\n"); - return 0; - } - base = (info.HighWord.Bits.BaseHi << 24) + - (info.HighWord.Bits.BaseMid << 16) - + info.BaseLow; - limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow; - if (info.HighWord.Bits.Granularity) - limit = (limit << 12) | 0xfff; - printf_filtered ("base=0x%08x limit=0x%08x", base, limit); - if (info.HighWord.Bits.Default_Big) - puts_filtered(" 32-bit "); - else - puts_filtered(" 16-bit "); - switch ((info.HighWord.Bits.Type & 0xf) >> 1) - { - case 0: - puts_filtered ("Data (Read-Only, Exp-up"); - break; - case 1: - puts_filtered ("Data (Read/Write, Exp-up"); - break; - case 2: - puts_filtered ("Unused segment ("); - break; - case 3: - puts_filtered ("Data (Read/Write, Exp-down"); - break; - case 4: - puts_filtered ("Code (Exec-Only, N.Conf"); - break; - case 5: - puts_filtered ("Code (Exec/Read, N.Conf"); - break; - case 6: - puts_filtered ("Code (Exec-Only, Conf"); - break; - case 7: - 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"); - 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"); - else - puts_filtered ("Byte granular.\n"); - return 1; - } - else - { - printf_filtered ("Invalid selector 0x%lx.\n",sel); - return 0; - } -} - -static void -display_selectors (char * args, int from_tty) -{ - if (!current_thread) - { - puts_filtered ("Impossible to display selectors now.\n"); - return; - } - if (!args) - { - - puts_filtered ("Selector $cs\n"); - display_selector (current_thread->h, - current_thread->context.SegCs); - puts_filtered ("Selector $ds\n"); - display_selector (current_thread->h, - current_thread->context.SegDs); - puts_filtered ("Selector $es\n"); - display_selector (current_thread->h, - current_thread->context.SegEs); - puts_filtered ("Selector $ss\n"); - display_selector (current_thread->h, - 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); - } - else - { - int sel; - sel = parse_and_eval_long (args); - printf_filtered ("Selector \"%s\"\n",args); - display_selector (current_thread->h, sel); - } -} - -static struct cmd_list_element *info_w32_cmdlist = NULL; - -static void -info_w32_command (char *args, int from_tty) -{ - help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout); -} - - -#define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \ - printf_unfiltered ("gdb: Target exception %s at 0x%08lx\n", x, \ - (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress) - -static int -handle_exception (struct target_waitstatus *ourstatus) -{ - thread_info *th; - DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode; - - ourstatus->kind = TARGET_WAITKIND_STOPPED; - - /* Record the context of the current thread */ - th = thread_rec (current_event.dwThreadId, -1); - - switch (code) - { - case EXCEPTION_ACCESS_VIOLATION: - DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION"); - ourstatus->value.sig = TARGET_SIGNAL_SEGV; - break; - case STATUS_STACK_OVERFLOW: - DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW"); - ourstatus->value.sig = TARGET_SIGNAL_SEGV; - break; - case STATUS_FLOAT_DENORMAL_OPERAND: - DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND"); - ourstatus->value.sig = TARGET_SIGNAL_FPE; - break; - case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: - DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED"); - ourstatus->value.sig = TARGET_SIGNAL_FPE; - break; - case STATUS_FLOAT_INEXACT_RESULT: - DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT"); - ourstatus->value.sig = TARGET_SIGNAL_FPE; - break; - case STATUS_FLOAT_INVALID_OPERATION: - DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION"); - ourstatus->value.sig = TARGET_SIGNAL_FPE; - break; - case STATUS_FLOAT_OVERFLOW: - DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW"); - ourstatus->value.sig = TARGET_SIGNAL_FPE; - break; - case STATUS_FLOAT_STACK_CHECK: - DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK"); - ourstatus->value.sig = TARGET_SIGNAL_FPE; - break; - case STATUS_FLOAT_UNDERFLOW: - DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW"); - ourstatus->value.sig = TARGET_SIGNAL_FPE; - break; - case STATUS_FLOAT_DIVIDE_BY_ZERO: - DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO"); - ourstatus->value.sig = TARGET_SIGNAL_FPE; - break; - case STATUS_INTEGER_DIVIDE_BY_ZERO: - DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO"); - ourstatus->value.sig = TARGET_SIGNAL_FPE; - break; - case STATUS_INTEGER_OVERFLOW: - DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW"); - ourstatus->value.sig = TARGET_SIGNAL_FPE; - break; - case EXCEPTION_BREAKPOINT: - DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT"); - ourstatus->value.sig = TARGET_SIGNAL_TRAP; - break; - case DBG_CONTROL_C: - DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C"); - ourstatus->value.sig = TARGET_SIGNAL_INT; - break; - case DBG_CONTROL_BREAK: - DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK"); - ourstatus->value.sig = TARGET_SIGNAL_INT; - break; - case EXCEPTION_SINGLE_STEP: - DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP"); - ourstatus->value.sig = TARGET_SIGNAL_TRAP; - break; - case EXCEPTION_ILLEGAL_INSTRUCTION: - DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION"); - ourstatus->value.sig = TARGET_SIGNAL_ILL; - break; - case EXCEPTION_PRIV_INSTRUCTION: - DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION"); - ourstatus->value.sig = TARGET_SIGNAL_ILL; - break; - case EXCEPTION_NONCONTINUABLE_EXCEPTION: - DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION"); - ourstatus->value.sig = TARGET_SIGNAL_ILL; - break; - default: - if (current_event.u.Exception.dwFirstChance) - return 0; - printf_unfiltered ("gdb: unknown target exception 0x%08lx at 0x%08lx\n", - current_event.u.Exception.ExceptionRecord.ExceptionCode, - (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress); - ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; - break; - } - exception_count++; - last_sig = ourstatus->value.sig; - return 1; -} - -/* Resume all artificially suspended threads if we are continuing - execution */ -static BOOL -child_continue (DWORD continue_status, int id) -{ - int i; - thread_info *th; - BOOL res; - - DEBUG_EVENTS (("ContinueDebugEvent (cpid=%ld, ctid=%ld, %s);\n", - current_event.dwProcessId, current_event.dwThreadId, - continue_status == DBG_CONTINUE ? - "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED")); - res = ContinueDebugEvent (current_event.dwProcessId, - current_event.dwThreadId, - continue_status); - continue_status = 0; - if (res) - for (th = &thread_head; (th = th->next) != NULL;) - if (((id == -1) || (id == (int) th->id)) && th->suspend_count) - { - - for (i = 0; i < th->suspend_count; i++) - (void) ResumeThread (th->h); - th->suspend_count = 0; - if (debug_registers_changed) - { - /* Only change the value of the debug reisters */ - th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; - th->context.Dr0 = dr[0]; - th->context.Dr1 = dr[1]; - th->context.Dr2 = dr[2]; - th->context.Dr3 = dr[3]; - /* th->context.Dr6 = dr[6]; - FIXME: should we set dr6 also ?? */ - th->context.Dr7 = dr[7]; - CHECK (SetThreadContext (th->h, &th->context)); - th->context.ContextFlags = 0; - } - } - - debug_registers_changed = 0; - return res; -} - -/* Get the next event from the child. Return 1 if the event requires - handling by WFI (or whatever). - */ -static int -get_child_debug_event (int pid, struct target_waitstatus *ourstatus) -{ - BOOL debug_event; - DWORD continue_status, event_code; - thread_info *th = NULL; - static thread_info dummy_thread_info; - int retval = 0; - - last_sig = TARGET_SIGNAL_0; - - if (!(debug_event = WaitForDebugEvent (¤t_event, 1000))) - goto out; - - event_count++; - continue_status = DBG_CONTINUE; - - event_code = current_event.dwDebugEventCode; - ourstatus->kind = TARGET_WAITKIND_SPURIOUS; - - switch (event_code) - { - case CREATE_THREAD_DEBUG_EVENT: - DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n", - (unsigned) current_event.dwProcessId, - (unsigned) current_event.dwThreadId, - "CREATE_THREAD_DEBUG_EVENT")); - if (saw_create != 1) - break; - /* Record the existence of this thread */ - th = child_add_thread (current_event.dwThreadId, - current_event.u.CreateThread.hThread); - if (info_verbose) - printf_unfiltered ("[New %s]\n", - target_pid_to_str ( - pid_to_ptid (current_event.dwThreadId))); - retval = current_event.dwThreadId; - break; - - case EXIT_THREAD_DEBUG_EVENT: - DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", - (unsigned) current_event.dwProcessId, - (unsigned) current_event.dwThreadId, - "EXIT_THREAD_DEBUG_EVENT")); - if (saw_create != 1) - break; - child_delete_thread (current_event.dwThreadId); - th = &dummy_thread_info; - break; - - case CREATE_PROCESS_DEBUG_EVENT: - DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", - (unsigned) current_event.dwProcessId, - (unsigned) current_event.dwThreadId, - "CREATE_PROCESS_DEBUG_EVENT")); - CloseHandle (current_event.u.CreateProcessInfo.hFile); - if (++saw_create != 1) - { - CloseHandle (current_event.u.CreateProcessInfo.hProcess); - break; - } - - current_process_handle = current_event.u.CreateProcessInfo.hProcess; - main_thread_id = current_event.dwThreadId; - /* Add the main thread */ -#if 0 - th = child_add_thread (current_event.dwProcessId, - current_event.u.CreateProcessInfo.hProcess); -#endif - th = child_add_thread (main_thread_id, - current_event.u.CreateProcessInfo.hThread); - retval = ourstatus->value.related_pid = current_event.dwThreadId; - break; - - case EXIT_PROCESS_DEBUG_EVENT: - DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", - (unsigned) current_event.dwProcessId, - (unsigned) current_event.dwThreadId, - "EXIT_PROCESS_DEBUG_EVENT")); - if (saw_create != 1) - break; - ourstatus->kind = TARGET_WAITKIND_EXITED; - ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode; - CloseHandle (current_process_handle); - retval = main_thread_id; - break; - - case LOAD_DLL_DEBUG_EVENT: - DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", - (unsigned) current_event.dwProcessId, - (unsigned) current_event.dwThreadId, - "LOAD_DLL_DEBUG_EVENT")); - CloseHandle (current_event.u.LoadDll.hFile); - if (saw_create != 1) - break; - catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL); - registers_changed (); /* mark all regs invalid */ - ourstatus->kind = TARGET_WAITKIND_LOADED; - ourstatus->value.integer = 0; - retval = main_thread_id; - break; - - case UNLOAD_DLL_DEBUG_EVENT: - DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", - (unsigned) current_event.dwProcessId, - (unsigned) current_event.dwThreadId, - "UNLOAD_DLL_DEBUG_EVENT")); - if (saw_create != 1) - break; - catch_errors (handle_unload_dll, NULL, (char *) "", RETURN_MASK_ALL); - registers_changed (); /* mark all regs invalid */ - /* ourstatus->kind = TARGET_WAITKIND_UNLOADED; - does not exist yet. */ - break; - - case EXCEPTION_DEBUG_EVENT: - DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", - (unsigned) current_event.dwProcessId, - (unsigned) current_event.dwThreadId, - "EXCEPTION_DEBUG_EVENT")); - if (saw_create != 1) - break; - if (handle_exception (ourstatus)) - retval = current_event.dwThreadId; - break; - - case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */ - DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", - (unsigned) current_event.dwProcessId, - (unsigned) current_event.dwThreadId, - "OUTPUT_DEBUG_STRING_EVENT")); - if (saw_create != 1) - break; - if (handle_output_debug_string (ourstatus)) - retval = main_thread_id; - break; - - default: - if (saw_create != 1) - break; - printf_unfiltered ("gdb: kernel event for pid=%ld tid=%ld\n", - (DWORD) current_event.dwProcessId, - (DWORD) current_event.dwThreadId); - printf_unfiltered (" unknown event code %ld\n", - current_event.dwDebugEventCode); - break; - } - - if (!retval || saw_create != 1) - CHECK (child_continue (continue_status, -1)); - else - { - current_thread = th ? : thread_rec (current_event.dwThreadId, TRUE); - inferior_ptid = pid_to_ptid (retval); - } - -out: - return retval; -} - -/* Wait for interesting events to occur in the target process. */ -static ptid_t -child_wait (ptid_t ptid, struct target_waitstatus *ourstatus) -{ - int pid = PIDGET (ptid); - - /* We loop when we get a non-standard exception rather than return - with a SPURIOUS because resume can try and step or modify things, - which needs a current_thread->h. But some of these exceptions mark - the birth or death of threads, which mean that the current thread - isn't necessarily what you think it is. */ - - while (1) - { - int retval = get_child_debug_event (pid, ourstatus); - if (retval) - return pid_to_ptid (retval); - else - { - int detach = 0; - - if (ui_loop_hook != NULL) - detach = ui_loop_hook (0); - - if (detach) - child_kill_inferior (); - } - } -} - -static void -do_initial_child_stuff (DWORD pid) -{ - extern int stop_after_trap; - int i; - - last_sig = TARGET_SIGNAL_0; - event_count = 0; - exception_count = 0; - debug_registers_changed = 0; - debug_registers_used = 0; - for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++) - dr[i] = 0; - current_event.dwProcessId = pid; - memset (¤t_event, 0, sizeof (current_event)); - push_target (&child_ops); - child_init_thread_list (); - child_clear_solibs (); - clear_proceed_status (); - init_wait_for_inferior (); - - target_terminal_init (); - target_terminal_inferior (); - - while (1) - { - stop_after_trap = 1; - wait_for_inferior (); - if (stop_signal != TARGET_SIGNAL_TRAP) - resume (0, stop_signal); - else - break; - } - stop_after_trap = 0; - return; -} - -/* Since Windows XP, detaching from a process is supported by Windows. - The following code tries loading the appropriate functions dynamically. - If loading these functions succeeds use them to actually detach from - the inferior process, otherwise behave as usual, pretending that - detach has worked. */ -static BOOL WINAPI (*DebugSetProcessKillOnExit)(BOOL); -static BOOL WINAPI (*DebugActiveProcessStop)(DWORD); - -static int -has_detach_ability () -{ - static HMODULE kernel32 = NULL; - - if (!kernel32) - kernel32 = LoadLibrary ("kernel32.dll"); - if (kernel32) - { - if (!DebugSetProcessKillOnExit) - DebugSetProcessKillOnExit = GetProcAddress (kernel32, - "DebugSetProcessKillOnExit"); - if (!DebugActiveProcessStop) - DebugActiveProcessStop = GetProcAddress (kernel32, - "DebugActiveProcessStop"); - if (DebugSetProcessKillOnExit && DebugActiveProcessStop) - return 1; - } - return 0; -} - -/* Attach to process PID, then initialize for debugging it. */ -static void -child_attach (char *args, int from_tty) -{ - BOOL ok; - DWORD pid; - - if (!args) - error_no_arg ("process-id to attach"); - - pid = strtoul (args, 0, 0); - ok = DebugActiveProcess (pid); - - if (!ok) - error ("Can't attach to process."); - - if (has_detach_ability ()) - { - attach_flag = 1; - DebugSetProcessKillOnExit (FALSE); - } - - if (from_tty) - { - char *exec_file = (char *) get_exec_file (0); - - if (exec_file) - printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, - target_pid_to_str (pid_to_ptid (pid))); - else - printf_unfiltered ("Attaching to %s\n", - target_pid_to_str (pid_to_ptid (pid))); - - gdb_flush (gdb_stdout); - } - - do_initial_child_stuff (pid); - target_terminal_ours (); -} - -static void -child_detach (char *args, int from_tty) -{ - int detached = 1; - - if (has_detach_ability ()) - { - delete_command (NULL, 0); - child_continue (DBG_CONTINUE, -1); - if (!DebugActiveProcessStop (current_event.dwProcessId)) - { - error ("Can't detach process %lu (error %lu)", - current_event.dwProcessId, GetLastError ()); - detached = 0; - } - DebugSetProcessKillOnExit (FALSE); - } - if (detached && from_tty) - { - char *exec_file = get_exec_file (0); - if (exec_file == 0) - exec_file = ""; - printf_unfiltered ("Detaching from program: %s, Pid %lu\n", exec_file, - current_event.dwProcessId); - gdb_flush (gdb_stdout); - } - inferior_ptid = null_ptid; - unpush_target (&child_ops); -} - -/* Print status information about what we're accessing. */ - -static void -child_files_info (struct target_ops *ignore) -{ - printf_unfiltered ("\tUsing the running image of %s %s.\n", - attach_flag ? "attached" : "child", target_pid_to_str (inferior_ptid)); -} - -/* ARGSUSED */ -static void -child_open (char *arg, int from_tty) -{ - error ("Use the \"run\" command to start a Unix child process."); -} - -/* Start an inferior win32 child process and sets inferior_ptid to its pid. - EXEC_FILE is the file to run. - ALLARGS is a string containing the arguments to the program. - ENV is the environment vector to pass. Errors reported with error(). */ - -static void -child_create_inferior (char *exec_file, char *allargs, char **env) -{ - char *winenv; - char *temp; - int envlen; - int i; - STARTUPINFO si; - PROCESS_INFORMATION pi; - BOOL ret; - DWORD flags; - char *args; - char real_path[MAXPATHLEN]; - char *toexec; - - if (!exec_file) - error ("No executable specified, use `target exec'.\n"); - - memset (&si, 0, sizeof (si)); - si.cb = sizeof (si); - - if (!useshell || !shell[0]) - { - flags = DEBUG_ONLY_THIS_PROCESS; - cygwin_conv_to_win32_path (exec_file, real_path); - toexec = real_path; - } - else - { - char *newallargs = alloca (sizeof (" -c 'exec '") + strlen (exec_file) - + strlen (allargs) + 2); - sprintf (newallargs, " -c 'exec %s %s'", exec_file, allargs); - allargs = newallargs; - toexec = shell; - flags = DEBUG_PROCESS; - } - - if (new_group) - flags |= CREATE_NEW_PROCESS_GROUP; - - if (new_console) - flags |= CREATE_NEW_CONSOLE; - - args = alloca (strlen (toexec) + strlen (allargs) + 2); - strcpy (args, toexec); - strcat (args, " "); - strcat (args, allargs); - - /* Prepare the environment vars for CreateProcess. */ - { - /* This code use to assume all env vars were file names and would - translate them all to win32 style. That obviously doesn't work in the - general case. The current rule is that we only translate PATH. - We need to handle PATH because we're about to call CreateProcess and - it uses PATH to find DLL's. Fortunately PATH has a well-defined value - in both posix and win32 environments. cygwin.dll will change it back - to posix style if necessary. */ - - static const char *conv_path_names[] = - { - "PATH=", - 0 - }; - - /* CreateProcess takes the environment list as a null terminated set of - strings (i.e. two nulls terminate the list). */ - - /* Get total size for env strings. */ - for (envlen = 0, i = 0; env[i] && *env[i]; i++) - { - int j, len; - - for (j = 0; conv_path_names[j]; j++) - { - len = strlen (conv_path_names[j]); - if (strncmp (conv_path_names[j], env[i], len) == 0) - { - if (cygwin_posix_path_list_p (env[i] + len)) - envlen += len - + cygwin_posix_to_win32_path_list_buf_size (env[i] + len); - else - envlen += strlen (env[i]) + 1; - break; - } - } - if (conv_path_names[j] == NULL) - envlen += strlen (env[i]) + 1; - } - - winenv = alloca (envlen + 1); - - /* Copy env strings into new buffer. */ - for (temp = winenv, i = 0; env[i] && *env[i]; i++) - { - int j, len; - - for (j = 0; conv_path_names[j]; j++) - { - len = strlen (conv_path_names[j]); - if (strncmp (conv_path_names[j], env[i], len) == 0) - { - if (cygwin_posix_path_list_p (env[i] + len)) - { - memcpy (temp, env[i], len); - cygwin_posix_to_win32_path_list (env[i] + len, temp + len); - } - else - strcpy (temp, env[i]); - break; - } - } - if (conv_path_names[j] == NULL) - strcpy (temp, env[i]); - - temp += strlen (temp) + 1; - } - - /* Final nil string to terminate new env. */ - *temp = 0; - } - - ret = CreateProcess (0, - args, /* command line */ - NULL, /* Security */ - NULL, /* thread */ - TRUE, /* inherit handles */ - flags, /* start flags */ - winenv, - NULL, /* current directory */ - &si, - &pi); - if (!ret) - error ("Error creating process %s, (error %d)\n", exec_file, GetLastError ()); - - CloseHandle (pi.hThread); - CloseHandle (pi.hProcess); - - if (useshell && shell[0] != '\0') - saw_create = -1; - else - saw_create = 0; - - do_initial_child_stuff (pi.dwProcessId); - - /* child_continue (DBG_CONTINUE, -1); */ - proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0); -} - -static void -child_mourn_inferior (void) -{ - (void) child_continue (DBG_CONTINUE, -1); - i386_cleanup_dregs(); - unpush_target (&child_ops); - generic_mourn_inferior (); -} - -/* Send a SIGINT to the process group. This acts just like the user typed a - ^C on the controlling terminal. */ - -static void -child_stop (void) -{ - DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n")); - CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId)); - registers_changed (); /* refresh register state */ -} - -int -child_xfer_memory (CORE_ADDR memaddr, char *our, int len, - int write, struct mem_attrib *mem, - struct target_ops *target) -{ - DWORD done; - if (write) - { - DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08lx\n", - len, (DWORD) memaddr)); - WriteProcessMemory (current_process_handle, (LPVOID) memaddr, our, - len, &done); - FlushInstructionCache (current_process_handle, (LPCVOID) memaddr, len); - } - else - { - DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08lx\n", - len, (DWORD) memaddr)); - ReadProcessMemory (current_process_handle, (LPCVOID) memaddr, our, len, - &done); - } - return done; -} - -void -child_kill_inferior (void) -{ - CHECK (TerminateProcess (current_process_handle, 0)); - - for (;;) - { - if (!child_continue (DBG_CONTINUE, -1)) - break; - if (!WaitForDebugEvent (¤t_event, INFINITE)) - break; - if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) - break; - } - - CHECK (CloseHandle (current_process_handle)); - - /* this may fail in an attached process so don't check. */ - (void) CloseHandle (current_thread->h); - target_mourn_inferior (); /* or just child_mourn_inferior? */ -} - -void -child_resume (ptid_t ptid, int step, enum target_signal sig) -{ - thread_info *th; - DWORD continue_status = DBG_CONTINUE; - - int pid = PIDGET (ptid); - - if (sig != TARGET_SIGNAL_0) - { - if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT) - { - DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig)); - } - else if (sig == last_sig) - continue_status = DBG_EXCEPTION_NOT_HANDLED; - else -#if 0 -/* This code does not seem to work, because - the kernel does probably not consider changes in the ExceptionRecord - structure when passing the exception to the inferior. - Note that this seems possible in the exception handler itself. */ - { - int i; - for (i = 0; xlate[i].them != -1; i++) - if (xlate[i].us == sig) - { - current_event.u.Exception.ExceptionRecord.ExceptionCode = - xlate[i].them; - continue_status = DBG_EXCEPTION_NOT_HANDLED; - break; - } - if (continue_status == DBG_CONTINUE) - { - DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig)); - } - } -#endif - DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n", - last_sig)); - } - - last_sig = TARGET_SIGNAL_0; - - DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, sig=%d);\n", - pid, step, sig)); - - /* Get context for currently selected thread */ - th = thread_rec (current_event.dwThreadId, FALSE); - if (th) - { - if (step) - { - /* Single step by setting t bit */ - child_fetch_inferior_registers (PS_REGNUM); - th->context.EFlags |= FLAG_TRACE_BIT; - } - - if (th->context.ContextFlags) - { - if (debug_registers_changed) - { - th->context.Dr0 = dr[0]; - th->context.Dr1 = dr[1]; - th->context.Dr2 = dr[2]; - th->context.Dr3 = dr[3]; - /* th->context.Dr6 = dr[6]; - FIXME: should we set dr6 also ?? */ - th->context.Dr7 = dr[7]; - } - CHECK (SetThreadContext (th->h, &th->context)); - th->context.ContextFlags = 0; - } - } - - /* Allow continuing with the same signal that interrupted us. - Otherwise complain. */ - - child_continue (continue_status, pid); -} - -static void -child_prepare_to_store (void) -{ - /* Do nothing, since we can store individual regs */ -} - -static int -child_can_run (void) -{ - return 1; -} - -static void -child_close (int x) -{ - DEBUG_EVENTS (("gdb: child_close, inferior_ptid=%d\n", - PIDGET (inferior_ptid))); -} - -struct target_ops child_ops; - -static void -init_child_ops (void) -{ - child_ops.to_shortname = "child"; - child_ops.to_longname = "Win32 child process"; - child_ops.to_doc = "Win32 child process (started by the \"run\" command)."; - child_ops.to_open = child_open; - child_ops.to_close = child_close; - child_ops.to_attach = child_attach; - child_ops.to_detach = child_detach; - child_ops.to_resume = child_resume; - child_ops.to_wait = child_wait; - child_ops.to_fetch_registers = child_fetch_inferior_registers; - child_ops.to_store_registers = child_store_inferior_registers; - child_ops.to_prepare_to_store = child_prepare_to_store; - child_ops.to_xfer_memory = child_xfer_memory; - child_ops.to_files_info = child_files_info; - child_ops.to_insert_breakpoint = memory_insert_breakpoint; - child_ops.to_remove_breakpoint = memory_remove_breakpoint; - child_ops.to_terminal_init = terminal_init_inferior; - child_ops.to_terminal_inferior = terminal_inferior; - child_ops.to_terminal_ours_for_output = terminal_ours_for_output; - child_ops.to_terminal_ours = terminal_ours; - child_ops.to_terminal_info = child_terminal_info; - child_ops.to_kill = child_kill_inferior; - child_ops.to_load = 0; - child_ops.to_lookup_symbol = 0; - child_ops.to_create_inferior = child_create_inferior; - child_ops.to_mourn_inferior = child_mourn_inferior; - child_ops.to_can_run = child_can_run; - child_ops.to_notice_signals = 0; - child_ops.to_thread_alive = win32_child_thread_alive; - child_ops.to_pid_to_str = cygwin_pid_to_str; - child_ops.to_stop = child_stop; - child_ops.to_stratum = process_stratum; - child_ops.DONT_USE = 0; - child_ops.to_has_all_memory = 1; - child_ops.to_has_memory = 1; - child_ops.to_has_stack = 1; - child_ops.to_has_registers = 1; - child_ops.to_has_execution = 1; - child_ops.to_sections = 0; - child_ops.to_sections_end = 0; - child_ops.to_magic = OPS_MAGIC; -} - -void -_initialize_inftarg (void) -{ - struct cmd_list_element *c; - const char *sh; - - init_child_ops (); - - c = add_com ("dll-symbols", class_files, dll_symbol_command, - "Load dll library symbols from FILE."); - c->completer = filename_completer; - - sh = getenv ("SHELL"); - if (!sh) - sh = "/bin/sh"; - if (access (sh, X_OK) != 0) - { - shell[0] = '\0'; - useshell = 0; - } - else - { - cygwin_conv_to_win32_path (sh, shell); - useshell = 1; - } - - add_com_alias ("sharedlibrary", "dll-symbols", class_alias, 1); - - add_show_from_set (add_set_cmd ("shell", class_support, var_boolean, - (char *) &useshell, - "Set use of shell to start subprocess.", - &setlist), - &showlist); - - add_show_from_set (add_set_cmd ("new-console", class_support, var_boolean, - (char *) &new_console, - "Set creation of new console when creating child process.", - &setlist), - &showlist); - - add_show_from_set (add_set_cmd ("new-group", class_support, var_boolean, - (char *) &new_group, - "Set creation of new group when creating child process.", - &setlist), - &showlist); - - add_show_from_set (add_set_cmd ("debugexec", class_support, var_boolean, - (char *) &debug_exec, - "Set whether to display execution in child process.", - &setlist), - &showlist); - - add_show_from_set (add_set_cmd ("debugevents", class_support, var_boolean, - (char *) &debug_events, - "Set whether to display kernel events in child process.", - &setlist), - &showlist); - - add_show_from_set (add_set_cmd ("debugmemory", class_support, var_boolean, - (char *) &debug_memory, - "Set whether to display memory accesses in child process.", - &setlist), - &showlist); - - add_show_from_set (add_set_cmd ("debugexceptions", class_support, var_boolean, - (char *) &debug_exceptions, - "Set whether to display kernel exceptions in child process.", - &setlist), - &showlist); - - add_info ("dll", info_dll_command, "Status of loaded DLLs."); - 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); - - add_cmd ("selector", class_info, display_selectors, - "Display selectors infos.", - &info_w32_cmdlist); - - add_target (&child_ops); -} - -/* Hardware watchpoint support, adapted from go32-nat.c code. */ - -/* Pass the address ADDR to the inferior in the I'th debug register. - Here we just store the address in dr array, the registers will be - actually set up when child_continue is called. */ -void -cygwin_set_dr (int i, CORE_ADDR addr) -{ - if (i < 0 || i > 3) - internal_error (__FILE__, __LINE__, - "Invalid register %d in cygwin_set_dr.\n", i); - dr[i] = (unsigned) addr; - debug_registers_changed = 1; - debug_registers_used = 1; -} - -/* Pass the value VAL to the inferior in the DR7 debug control - register. Here we just store the address in D_REGS, the watchpoint - will be actually set up in child_wait. */ -void -cygwin_set_dr7 (unsigned val) -{ - dr[7] = val; - debug_registers_changed = 1; - debug_registers_used = 1; -} - -/* Get the value of the DR6 debug status register from the inferior. - Here we just return the value stored in dr[6] - by the last call to thread_rec for current_event.dwThreadId id. */ -unsigned -cygwin_get_dr6 (void) -{ - return dr[6]; -} - - -/* Determine if the thread referenced by "pid" is alive - by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0 - it means that the pid has died. Otherwise it is assumed to be alive. */ -static int -win32_child_thread_alive (ptid_t ptid) -{ - int pid = PIDGET (ptid); - - return WaitForSingleObject (thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ? - FALSE : TRUE; -} - -/* Convert pid to printable format. */ -char * -cygwin_pid_to_str (ptid_t ptid) -{ - static char buf[80]; - int pid = PIDGET (ptid); - - if ((DWORD) pid == current_event.dwProcessId) - sprintf (buf, "process %d", pid); - else - sprintf (buf, "thread %ld.0x%x", current_event.dwProcessId, pid); - return buf; -} - -static int -core_dll_symbols_add (char *dll_name, DWORD base_addr) -{ - struct objfile *objfile; - char *objfile_basename; - const char *dll_basename; - - if (!(dll_basename = strrchr (dll_name, '/'))) - dll_basename = dll_name; - else - dll_basename++; - - ALL_OBJFILES (objfile) - { - objfile_basename = strrchr (objfile->name, '/'); - - if (objfile_basename && - strcmp (dll_basename, objfile_basename + 1) == 0) - { - printf_unfiltered ("%08lx:%s (symbols previously loaded)\n", - base_addr, dll_name); - goto out; - } - } - - register_loaded_dll (dll_name, base_addr + 0x1000); - solib_symbols_add (dll_name, 0, (CORE_ADDR) base_addr + 0x1000); - -out: - return 1; -} - -typedef struct -{ - struct target_ops *target; - bfd_vma addr; -} -map_code_section_args; - -static void -map_single_dll_code_section (bfd * abfd, asection * sect, void *obj) -{ - int old; - int update_coreops; - struct section_table *new_target_sect_ptr; - - map_code_section_args *args = (map_code_section_args *) obj; - struct target_ops *target = args->target; - if (sect->flags & SEC_CODE) - { - update_coreops = core_ops.to_sections == target->to_sections; - - if (target->to_sections) - { - old = target->to_sections_end - target->to_sections; - target->to_sections = (struct section_table *) - xrealloc ((char *) target->to_sections, - (sizeof (struct section_table)) * (1 + old)); - } - else - { - old = 0; - target->to_sections = (struct section_table *) - xmalloc ((sizeof (struct section_table))); - } - target->to_sections_end = target->to_sections + (1 + old); - - /* Update the to_sections field in the core_ops structure - if needed. */ - if (update_coreops) - { - core_ops.to_sections = target->to_sections; - core_ops.to_sections_end = target->to_sections_end; - } - new_target_sect_ptr = target->to_sections + old; - new_target_sect_ptr->addr = args->addr + bfd_section_vma (abfd, sect); - new_target_sect_ptr->endaddr = args->addr + bfd_section_vma (abfd, sect) + - bfd_section_size (abfd, sect);; - new_target_sect_ptr->the_bfd_section = sect; - new_target_sect_ptr->bfd = abfd; - } -} - -static int -dll_code_sections_add (const char *dll_name, int base_addr, struct target_ops *target) -{ - bfd *dll_bfd; - map_code_section_args map_args; - asection *lowest_sect; - char *name; - if (dll_name == NULL || target == NULL) - return 0; - name = xstrdup (dll_name); - dll_bfd = bfd_openr (name, "pei-i386"); - if (dll_bfd == NULL) - return 0; - - if (bfd_check_format (dll_bfd, bfd_object)) - { - lowest_sect = bfd_get_section_by_name (dll_bfd, ".text"); - if (lowest_sect == NULL) - return 0; - map_args.target = target; - map_args.addr = base_addr - bfd_section_vma (dll_bfd, lowest_sect); - - bfd_map_over_sections (dll_bfd, &map_single_dll_code_section, (void *) (&map_args)); - } - - return 1; -} - -static void -core_section_load_dll_symbols (bfd * abfd, asection * sect, void *obj) -{ - struct target_ops *target = (struct target_ops *) obj; - - DWORD base_addr; - - int dll_name_size; - char *dll_name = NULL; - char *buf = NULL; - struct win32_pstatus *pstatus; - char *p; - - if (strncmp (sect->name, ".module", 7)) - return; - - buf = (char *) xmalloc (sect->_raw_size + 1); - if (!buf) - { - printf_unfiltered ("memory allocation failed for %s\n", sect->name); - goto out; - } - if (!bfd_get_section_contents (abfd, sect, buf, 0, sect->_raw_size)) - goto out; - - pstatus = (struct win32_pstatus *) buf; - - memmove (&base_addr, &(pstatus->data.module_info.base_address), sizeof (base_addr)); - dll_name_size = pstatus->data.module_info.module_name_size; - if (offsetof (struct win32_pstatus, data.module_info.module_name) + dll_name_size > sect->_raw_size) - goto out; - - dll_name = (char *) xmalloc (dll_name_size + 1); - if (!dll_name) - { - printf_unfiltered ("memory allocation failed for %s\n", sect->name); - goto out; - } - strncpy (dll_name, pstatus->data.module_info.module_name, dll_name_size); - - while ((p = strchr (dll_name, '\\'))) - *p = '/'; - - if (!core_dll_symbols_add (dll_name, (DWORD) base_addr)) - printf_unfiltered ("%s: Failed to load dll symbols.\n", dll_name); - - if (!dll_code_sections_add (dll_name, (DWORD) base_addr + 0x1000, target)) - printf_unfiltered ("%s: Failed to map dll code sections.\n", dll_name); - -out: - if (buf) - xfree (buf); - if (dll_name) - xfree (dll_name); - return; -} - -void -child_solib_add (char *filename, int from_tty, struct target_ops *target, - int readsyms) -{ - if (!readsyms) - return; - if (core_bfd) - { - child_clear_solibs (); - bfd_map_over_sections (core_bfd, &core_section_load_dll_symbols, target); - } - else - { - if (solib_end && solib_end->name) - solib_end->objfile = solib_symbols_add (solib_end->name, from_tty, - solib_end->load_addr); - } -} - -static void -fetch_elf_core_registers (char *core_reg_sect, - unsigned core_reg_size, - int which, - CORE_ADDR reg_addr) -{ - int r; - if (core_reg_size < sizeof (CONTEXT)) - { - error ("Core file register section too small (%u bytes).", core_reg_size); - return; - } - for (r = 0; r < NUM_REGS; r++) - supply_register (r, core_reg_sect + mappings[r]); -} - -static struct core_fns win32_elf_core_fns = -{ - bfd_target_elf_flavour, - default_check_format, - default_core_sniffer, - fetch_elf_core_registers, - NULL -}; - -void -_initialize_core_win32 (void) -{ - add_core_fns (&win32_elf_core_fns); -} - -void -_initialize_check_for_gdb_ini (void) -{ - char *homedir; - if (inhibit_gdbinit) - return; - - homedir = getenv ("HOME"); - if (homedir) - { - char *p; - char *oldini = (char *) alloca (strlen (homedir) + - sizeof ("/gdb.ini")); - strcpy (oldini, homedir); - p = strchr (oldini, '\0'); - if (p > oldini && p[-1] != '/') - *p++ = '/'; - strcpy (p, "gdb.ini"); - if (access (oldini, 0) == 0) - { - int len = strlen (oldini); - char *newini = alloca (len + 1); - sprintf (newini, "%.*s.gdbinit", - (int) (len - (sizeof ("gdb.ini") - 1)), oldini); - warning ("obsolete '%s' found. Rename to '%s'.", oldini, newini); - } - } -} |