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Diffstat (limited to 'gdb/wince.c')
| -rw-r--r-- | gdb/wince.c | 2034 |
1 files changed, 2034 insertions, 0 deletions
diff --git a/gdb/wince.c b/gdb/wince.c new file mode 100644 index 0000000..bdd7c2f --- /dev/null +++ b/gdb/wince.c @@ -0,0 +1,2034 @@ +/* Target-vector operations for controlling Windows CE child processes, for GDB. + Copyright 1999, 2000 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. + */ + +/* by Christopher Faylor (cgf@cygnus.com) */ + +/* We assume we're being built with and will be used for cygwin. */ + +#ifdef SHx +#undef SH4 +#define SH4 /* Just to get all of the CONTEXT defines. */ +#endif + +#include "defs.h" +#include "frame.h" /* required by inferior.h */ +#include "inferior.h" +#include "target.h" +#include "wait.h" +#include "gdbcore.h" +#include "command.h" +#include <signal.h> +#include <sys/types.h> +#include <fcntl.h> +#include <stdlib.h> + +#include <windows.h> +#include <rapi.h> +#include <netdb.h> +#include <cygwin/in.h> +#include <cygwin/socket.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 "wince-stub.h" +#include "dcache.h" + +/* The ui's event loop. */ +extern int (*ui_loop_hook) PARAMS ((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 +#define FLAG_TRACE_BIT 0x100 +#ifdef CONTEXT_FLOATING_POINT +#define CONTEXT_DEBUGGER0 (CONTEXT_FULL | CONTEXT_FLOATING_POINT) +#else +#define CONTEXT_DEBUGGER0 (CONTEXT_FULL) +#endif +#endif + +#ifdef SH4 +#define CONTEXT_DEBUGGER ((CONTEXT_DEBUGGER0 & ~(CONTEXT_SH4 | CONTEXT_FLOATING_POINT)) | CONTEXT_SH3) +#else +#define CONTEXT_DEBUGGER CONTEXT_DEBUGGER0 +#endif +/* 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 x +#define DEBUG_EVENTS(x) if (debug_events) printf x +#define DEBUG_MEM(x) if (debug_memory) printf x +#define DEBUG_EXCEPT(x) if (debug_exceptions) printf x + +static int connection_initialized = 0; /* True if we've initialized a RAPI session. */ + +static DCACHE *remote_dcache; + +/* The directory where the stub and executable files are uploaded. */ +static const char *remote_directory = "\\gdb"; + +/* The types automatic upload available. */ +static enum + { + UPLOAD_ALWAYS = 0, + UPLOAD_NEWER = 1, + UPLOAD_NEVER = 2 + } +upload_when = UPLOAD_NEWER; + +/* Valid options for 'set remoteupload'. Note that options + must track upload_when enum. */ +static struct opts + { + const char *name; + int abbrev; + } +upload_options[3] = +{ + { + "always", 1 + } + , + { + "newer", 3 + } + , + { + "never", 3 + } +}; + +static char *remote_upload = NULL; /* Set by set remoteupload */ +static int remote_add_host = 0; + +/* Forward declaration */ +extern struct target_ops child_ops; + +static int win32_child_thread_alive PARAMS ((int)); +void child_kill_inferior PARAMS ((void)); + +static int last_sig = 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; + int stepped; /* True if stepped. */ + CORE_ADDR step_pc; + unsigned long step_instr; + unsigned long step_prev; + CONTEXT context; + } +thread_info; + +static thread_info thread_head = +{NULL}; + +/* 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 thread_info *this_thread; /* Info on thread returned by wait_for_debug_event */ +static DWORD main_thread_id; /* Thread ID of the main thread */ + +/* Counts of things. */ +static int exception_count = 0; +static int event_count = 0; + +/* User options. */ +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 */ + +/* An array of offset mappings into a Win32 Context structure. + This is a one-to-one mapping which is indexed by gdb's register + numbers. It retrieves an offset into the context structure where + the 4 byte register is located. + An offset value of -1 indicates that Win32 does not provide this + register in it's CONTEXT structure. regptr will return zero for this + register. + + This is used by the regptr function. */ +#define context_offset(x) ((int)&(((PCONTEXT)NULL)->x)) +static const int mappings[NUM_REGS + 1] = +{ +#ifdef __i386__ + 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]), +#elif defined(SHx) + context_offset (R0), + context_offset (R1), + context_offset (R2), + context_offset (R3), + context_offset (R4), + context_offset (R5), + context_offset (R6), + context_offset (R7), + context_offset (R8), + context_offset (R9), + context_offset (R10), + context_offset (R11), + context_offset (R12), + context_offset (R13), + context_offset (R14), + context_offset (R15), + context_offset (Fir), + context_offset (PR), /* Procedure Register */ + context_offset (GBR), /* Global Base Register */ + context_offset (MACH), /* Accumulate */ + context_offset (MACL), /* Multiply */ + context_offset (Psr), + context_offset (Fpul), + context_offset (Fpscr), + context_offset (FRegs[0]), + context_offset (FRegs[1]), + context_offset (FRegs[2]), + context_offset (FRegs[3]), + context_offset (FRegs[4]), + context_offset (FRegs[5]), + context_offset (FRegs[6]), + context_offset (FRegs[7]), + context_offset (FRegs[8]), + context_offset (FRegs[9]), + context_offset (FRegs[10]), + context_offset (FRegs[11]), + context_offset (FRegs[12]), + context_offset (FRegs[13]), + context_offset (FRegs[14]), + context_offset (FRegs[15]), + context_offset (xFRegs[0]), + context_offset (xFRegs[1]), + context_offset (xFRegs[2]), + context_offset (xFRegs[3]), + context_offset (xFRegs[4]), + context_offset (xFRegs[5]), + context_offset (xFRegs[6]), + context_offset (xFRegs[7]), + context_offset (xFRegs[8]), + context_offset (xFRegs[9]), + context_offset (xFRegs[10]), + context_offset (xFRegs[11]), + context_offset (xFRegs[12]), + context_offset (xFRegs[13]), + context_offset (xFRegs[14]), + context_offset (xFRegs[15]), +#elif defined(MIPS) + context_offset (IntZero), + context_offset (IntAt), + context_offset (IntV0), + context_offset (IntV1), + context_offset (IntA0), + context_offset (IntA1), + context_offset (IntA2), + context_offset (IntA3), + context_offset (IntT0), + context_offset (IntT1), + context_offset (IntT2), + context_offset (IntT3), + context_offset (IntT4), + context_offset (IntT5), + context_offset (IntT6), + context_offset (IntT7), + context_offset (IntS0), + context_offset (IntS1), + context_offset (IntS2), + context_offset (IntS3), + context_offset (IntS4), + context_offset (IntS5), + context_offset (IntS6), + context_offset (IntS7), + context_offset (IntT8), + context_offset (IntT9), + context_offset (IntK0), + context_offset (IntK1), + context_offset (IntGp), + context_offset (IntSp), + context_offset (IntS8), + context_offset (IntRa), + context_offset (Psr), + context_offset (IntLo), + context_offset (IntHi), + -1, /* bad */ + -1, /* cause */ + context_offset (Fir), + context_offset (FltF0), + context_offset (FltF1), + context_offset (FltF2), + context_offset (FltF3), + context_offset (FltF4), + context_offset (FltF5), + context_offset (FltF6), + context_offset (FltF7), + context_offset (FltF8), + context_offset (FltF9), + context_offset (FltF10), + context_offset (FltF11), + context_offset (FltF12), + context_offset (FltF13), + context_offset (FltF14), + context_offset (FltF15), + context_offset (FltF16), + context_offset (FltF17), + context_offset (FltF18), + context_offset (FltF19), + context_offset (FltF20), + context_offset (FltF21), + context_offset (FltF22), + context_offset (FltF23), + context_offset (FltF24), + context_offset (FltF25), + context_offset (FltF26), + context_offset (FltF27), + context_offset (FltF28), + context_offset (FltF29), + context_offset (FltF30), + context_offset (FltF31), + context_offset (Fsr), + context_offset (Fir), + -1, /* fp */ +#elif defined(ARM) + context_offset (R0), + context_offset (R1), + context_offset (R2), + context_offset (R3), + context_offset (R4), + context_offset (R5), + context_offset (R6), + context_offset (R7), + context_offset (R8), + context_offset (R9), + context_offset (R10), + context_offset (R11), + context_offset (R12), + context_offset (Sp), + context_offset (Lr), + context_offset (Pc), + -1, + -1, + -1, + -1, + -1, + -1, + -1, + -1, + -1, + context_offset (Psr), +#endif + -1 +}; + +/* 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}, + {-1, -1}}; + +/******************** Beginning of stub interface ********************/ + +/* Stub interface description: + + The Windows CE stub implements a crude RPC. The hand-held device + connects to gdb using port 7000. gdb and the stub then communicate + using packets where: + + byte 0: command id (e.g. Create Process) + + byte 1-4: DWORD + + byte 1-2: WORD + + byte 1-2: length + byte 3-n: arbitrary memory. + + The interface is deterministic, i.e., if the stub expects a DWORD then + the gdb server should send a DWORD. + */ + +/* Note: In the functions below, the `huh' parameter is a string passed from the + function containing a descriptive string concerning the current operation. + This is used for error reporting. + + The 'what' parameter is a command id as found in wince-stub.h. + + Hopefully, the rest of the parameters are self-explanatory. + */ + +static int s; /* communication socket */ + +/* v-style interface for handling varying argyment list error messages. + Displays the error message in a dialog box and exits when user clicks + on OK. */ +static void +vstub_error (LPCSTR fmt, va_list * args) +{ + char buf[4096]; + vsprintf (buf, fmt, args); + s = -1; + error ("%s", buf); +} + +/* The standard way to display an error message and exit. */ +static void +stub_error (LPCSTR fmt,...) +{ + va_list args; + va_start (args, fmt); + vstub_error (fmt, args); +} + +/* Standard "oh well" can't communicate error. Someday this might attempt + synchronization. */ +static void +attempt_resync (LPCSTR huh, int s) +{ + stub_error ("lost synchronization with target attempting %s", huh); +} + +/* Read arbitrary stuff from a socket. */ +static int +sockread (LPCSTR huh, int s, void *str, size_t n) +{ + for (;;) + { + if (recv (s, str, n, 0) == n) + return n; + attempt_resync (huh, s); + } +} + +/* Write arbitrary stuff to a socket. */ +static int +sockwrite (LPCSTR huh, const void *str, size_t n) +{ + for (;;) + { + if (send (s, str, n, 0) == n) + return n; + attempt_resync (huh, s); + } +} + +/* Output an id/dword to the host */ +static void +putdword (LPCSTR huh, gdb_wince_id what, DWORD n) +{ + if (sockwrite (huh, &what, sizeof (what)) != sizeof (what)) + stub_error ("error writing record id to host for %s", huh); + if (sockwrite (huh, &n, sizeof (n)) != sizeof (n)) + stub_error ("error writing %s to host.", huh); +} + +/* Output an id/word to the host */ +static void +putword (LPCSTR huh, gdb_wince_id what, WORD n) +{ + if (sockwrite (huh, &what, sizeof (what)) != sizeof (what)) + stub_error ("error writing record id to host for %s", huh); + if (sockwrite (huh, &n, sizeof (n)) != sizeof (n)) + stub_error ("error writing %s host.", huh); +} + +/* Convenience define for outputting a "gdb_wince_len" type. */ +#define putlen(huh, what, n) putword((huh), (what), (gdb_wince_len) (n)) + +/* Put an arbitrary block of memory to the gdb host. This comes in + two chunks an id/dword representing the length and the stream of memory + itself. */ +static void +putmemory (LPCSTR huh, gdb_wince_id what, const void *mem, gdb_wince_len len) +{ + putlen (huh, what, len); + if (((short) len > 0) && sockwrite (huh, mem, len) != len) + stub_error ("error writing %s to host.", huh); +} + +/* Output the result of an operation to the host. If res != 0, sends a block of + memory starting at mem of len bytes. If res == 0, sends -GetLastError () and + avoids sending the mem. */ +static DWORD +getdword (LPCSTR huh, gdb_wince_id what_this) +{ + DWORD n; + gdb_wince_id what; + do + if (sockread (huh, s, &what, sizeof (what)) != sizeof (what)) + stub_error ("error getting record type from host - %s.", huh); + while (what_this != what); + + if (sockread (huh, s, &n, sizeof (n)) != sizeof (n)) + stub_error ("error getting %s from host.", huh); + + return n; +} + +/* Get a an ID (possibly) and a WORD from the host gdb. + Don't bother with the id if the main loop has already + read it. */ +static WORD +getword (LPCSTR huh, gdb_wince_id what_this) +{ + WORD n; + gdb_wince_id what; + do + if (sockread (huh, s, &what, sizeof (what)) != sizeof (what)) + stub_error ("error getting record type from host - %s.", huh); + while (what_this != what); + + if (sockread (huh, s, &n, sizeof (n)) != sizeof (n)) + stub_error ("error getting %s from host.", huh); + + return n; +} + +/* Handy defines for getting/putting various types of values. */ +#define gethandle(huh, what) (HANDLE) getdword ((huh), (what)) +#define getpvoid(huh, what) (LPVOID) getdword ((huh), (what)) +#define getlen(huh, what) (gdb_wince_len) getword ((huh), (what)) +#define puthandle(huh, what, h) putdword ((huh), (what), (DWORD) (h)) +#define putpvoid(huh, what, p) putdword ((huh), (what), (DWORD) (p)) + +/* Retrieve the result of an operation from the stub. If nbytes < 0) then nbytes + is actually an error and nothing else follows. Use SetLastError to remember this. + if nbytes > 0, retrieve a block of *nbytes into buf. + */ +int +getresult (LPCSTR huh, gdb_wince_id what, LPVOID buf, gdb_wince_len * nbytes) +{ + gdb_wince_len dummy; + if (nbytes == NULL) + nbytes = &dummy; + + *nbytes = getlen (huh, what); + + if ((short) *nbytes < 0) + { + SetLastError (-(short) *nbytes); + return 0; + } + + if ((gdb_wince_len) sockread (huh, s, buf, *nbytes) != *nbytes) + stub_error ("couldn't read information from wince stub - %s", huh); + + return 1; +} + +/* Convert "narrow" string to "wide". Manipulates a buffer ring of 8 + buffers which hold the translated string. This is an arbitrary limit + but it is approximately double the current needs of this module. + */ +LPWSTR +towide (const char *s, gdb_wince_len * out_len) +{ + static int n = -1; + static LPWSTR outs[8] = + {NULL /*, NULL, etc. */ }; + gdb_wince_len dummy; + + if (!out_len) + out_len = &dummy; + + /* First determine the length required to hold the converted string. */ + *out_len = sizeof (WCHAR) * MultiByteToWideChar (CP_ACP, 0, s, -1, NULL, 0); + if (!*out_len) + return NULL; /* The conversion failed */ + + if (++n >= (sizeof (outs) / sizeof (outs[0]))) + n = 0; /* wrap */ + + /* Allocate space for the converted string, reusing any previously allocated + space, if applicable. Note that if outs[n] is NULL, realloc will act as + a malloc (under cygwin, at least). + */ + outs[n] = (LPWSTR) realloc (outs[n], *out_len); + memset (outs[n], 0, *out_len); + (void) MultiByteToWideChar (CP_ACP, 0, s, -1, outs[n], *out_len); + return outs[n]; +} + +/******************** Emulation routines start here. ******************** + + The functions below are modelled after their Win32 counterparts. They are named + similarly to Win32 and take exactly the same arguments except where otherwise noted. + They communicate with the stub on the hand-held device by sending their arguments + over the socket and waiting for results from the socket. + + There is one universal change. In cases where a length is expected to be returned + in a DWORD, we use a gdb_wince_len type instead. Currently this is an unsigned short + which is smaller than the standard Win32 DWORD. This is done to minimize unnecessary + traffic since the connection to Windows CE can be slow. To change this, modify the + typedef in wince-stub.h and change the putlen/getlen macros in this file and in + the stub. +*/ +static int +create_process (LPSTR exec_file, LPSTR args, DWORD flags, PROCESS_INFORMATION * pi) +{ + gdb_wince_len len; + LPWSTR buf; + + buf = towide (exec_file, &len); + putmemory ("CreateProcess exec_file", GDB_CREATEPROCESS, buf, len); + buf = towide (args, &len); + putmemory ("CreateProcess args", GDB_CREATEPROCESS, buf, len); + putdword ("CreateProcess flags", GDB_CREATEPROCESS, flags); + return getresult ("CreateProcess result", GDB_CREATEPROCESS, pi, NULL); +} + +/* Emulate TerminateProcess. Don't bother with the second argument since CE + ignores it. + */ +static int +terminate_process (HANDLE h) +{ + gdb_wince_result res; + if (s < 0) + return 1; + puthandle ("TerminateProcess handle", GDB_TERMINATEPROCESS, h); + return getresult ("TerminateProcess result", GDB_TERMINATEPROCESS, &res, NULL); +} + +static int +wait_for_debug_event (DEBUG_EVENT * ev, DWORD ms) +{ + if (s < 0) + return 1; + putdword ("WaitForDebugEvent ms", GDB_WAITFORDEBUGEVENT, ms); + return getresult ("WaitForDebugEvent event", GDB_WAITFORDEBUGEVENT, ev, NULL); +} + +static int +get_thread_context (HANDLE h, CONTEXT * c) +{ + if (s < 0) + return 1; + puthandle ("GetThreadContext handle", GDB_GETTHREADCONTEXT, h); + putdword ("GetThreadContext flags", GDB_GETTHREADCONTEXT, c->ContextFlags); + return getresult ("GetThreadContext context", GDB_GETTHREADCONTEXT, c, NULL); +} + +static int +set_thread_context (HANDLE h, CONTEXT * c) +{ + gdb_wince_result res; + if (s < 0) + return 1; + puthandle ("SetThreadContext handle", GDB_SETTHREADCONTEXT, h); + putmemory ("SetThreadContext context", GDB_SETTHREADCONTEXT, c, sizeof (*c)); + return getresult ("SetThreadContext context", GDB_SETTHREADCONTEXT, &res, NULL); +} + +static int +read_process_memory (HANDLE h, LPCVOID where, LPVOID buf, gdb_wince_len len, gdb_wince_len * nbytes) +{ + if (s < 0) + return 1; + puthandle ("ReadProcessMemory handle", GDB_READPROCESSMEMORY, h); + putpvoid ("ReadProcessMemory location", GDB_READPROCESSMEMORY, where); + putlen ("ReadProcessMemory size", GDB_READPROCESSMEMORY, len); + + return getresult ("ReadProcessMemory buf", GDB_READPROCESSMEMORY, buf, nbytes); +} + +static int +write_process_memory (HANDLE h, LPCVOID where, LPCVOID buf, gdb_wince_len len, gdb_wince_len * nbytes) +{ + if (s < 0) + return 1; + puthandle ("WriteProcessMemory handle", GDB_WRITEPROCESSMEMORY, h); + putpvoid ("WriteProcessMemory location", GDB_WRITEPROCESSMEMORY, where); + putmemory ("WriteProcProcessMemory buf", GDB_WRITEPROCESSMEMORY, buf, len); + + return getresult ("WriteProcessMemory result", GDB_WRITEPROCESSMEMORY, nbytes, NULL); +} + +static int +remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len) +{ + gdb_wince_len nbytes; + if (!read_process_memory (current_process_handle, (LPCVOID) memaddr, + (LPVOID) myaddr, len, &nbytes)) + return -1; + return nbytes; +} + +static int +remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len) +{ + gdb_wince_len nbytes; + if (!write_process_memory (current_process_handle, (LPCVOID) memaddr, + (LPCVOID) myaddr, len, &nbytes)) + return -1; + return nbytes; +} + +/* This is not a standard Win32 function. It instructs the stub to return TRUE + if the thread referenced by HANDLE h is alive. + */ +static int +thread_alive (HANDLE h) +{ + gdb_wince_result res; + if (s < 0) + return 1; + puthandle ("ThreadAlive handle", GDB_THREADALIVE, h); + return getresult ("ThreadAlive result", GDB_THREADALIVE, &res, NULL); +} + +static int +suspend_thread (HANDLE h) +{ + if (s < 0) + return 1; + puthandle ("SuspendThread handle", GDB_SUSPENDTHREAD, h); + return (int) getdword ("SuspendThread result", GDB_SUSPENDTHREAD); +} + +static int +resume_thread (HANDLE h) +{ + if (s < 0) + return 1; + puthandle ("ResumeThread handle", GDB_RESUMETHREAD, h); + return (int) getdword ("SuspendThread result", GDB_RESUMETHREAD); +} + +static int +continue_debug_event (DWORD pid, DWORD tid, DWORD status) +{ + gdb_wince_result res; + if (s < 0) + return 0; + putdword ("ContinueDebugEvent pid", GDB_CONTINUEDEBUGEVENT, pid); + putdword ("ContinueDebugEvent tid", GDB_CONTINUEDEBUGEVENT, tid); + putdword ("ContinueDebugEvent status", GDB_CONTINUEDEBUGEVENT, status); + return getresult ("ContinueDebugEvent result", GDB_CONTINUEDEBUGEVENT, &res, NULL); +} + +static int +close_handle (HANDLE h) +{ + gdb_wince_result res; + if (s < 0) + return 1; + puthandle ("CloseHandle handle", GDB_CLOSEHANDLE, h); + return (int) getresult ("CloseHandle result", GDB_CLOSEHANDLE, &res, NULL); +} + +/* This is not a standard Win32 interface. This function tells the stub + to terminate. + */ +static void +stop_stub () +{ + if (s < 0) + return; + (void) putdword ("Stopping gdb stub", GDB_STOPSTUB, 0); + s = -1; +} + +/******************** End of emulation routines. ********************/ +/******************** End of stub interface ********************/ + +/* 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 && th != this_thread) + th->suspend_count = suspend_thread (th->h) + 1; + else if (get_context < 0) + th->suspend_count = -1; + + th->context.ContextFlags = CONTEXT_DEBUGGER; + get_thread_context (th->h, &th->context); + } + 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 (id); + return th; +} + +/* Clear out any old thread list and reintialize it to a + pristine state. */ +static void +child_init_thread_list () +{ + 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) close_handle (here->h); + free (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 (id)); + delete_thread (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; + close_handle (here->h); + free (here); + } +} + +static void +check (BOOL ok, const char *file, int line) +{ + if (!ok) + printf_filtered ("error return %s:%d was %d\n", file, line, GetLastError ()); +} + +/* Return a pointer into a CONTEXT field indexed by gdb register number. + Return a pointer to an address pointing to zero if there is no + corresponding CONTEXT field for the given register number. + */ +static ULONG * +regptr (LPCONTEXT c, int r) +{ + static ULONG zero = 0; + ULONG *p; + if (mappings[r] < 0) + p = &zero; + else + p = (ULONG *) (((char *) c) + mappings[r]); + return p; +} + +static void +do_child_fetch_inferior_registers (int r) +{ + if (r >= 0) + { + supply_register (r, (char *) regptr (¤t_thread->context, r)); + } + 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 (inferior_pid, 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 (inferior_pid, TRUE); + do_child_store_inferior_registers (r); +} + +/* 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 (PTR dummy) +{ + LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; + char dll_buf[MAX_PATH + 1]; + char *p, *bufp, *imgp, *dll_name, *dll_basename; + int len; + + dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; + if (!event->lpImageName) + return 1; + + len = 0; + for (bufp = dll_buf, imgp = event->lpImageName; + bufp < dll_buf + sizeof (dll_buf); + bufp += 16, imgp += 16) + { + gdb_wince_len nbytes = 0; + (void) read_process_memory (current_process_handle, + imgp, bufp, 16, &nbytes); + + if (!nbytes && bufp == dll_buf) + return 1; /* couldn't read it */ + for (p = bufp; p < bufp + nbytes; p++) + { + len++; + if (*p == '\0') + goto out; + if (event->fUnicode) + p++; + } + if (!nbytes) + break; + } + +out: + if (!len) + return 1; + dll_buf[len] = '\0'; + dll_name = alloca (len); + + if (!dll_name) + return 1; + + if (!event->fUnicode) + memcpy (dll_name, dll_buf, len); + else + WideCharToMultiByte (CP_ACP, 0, (LPCWSTR) dll_buf, len, + dll_name, len, 0, 0); + + while ((p = strchr (dll_name, '\\'))) + *p = '/'; + + /* FIXME!! It would be nice to define one symbol which pointed to the + front of the dll if we can't find any symbols. */ + + if (!(dll_basename = strrchr (dll_name, '/'))) + dll_basename = dll_name; + else + dll_basename++; + + /* 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. + + FIXME: Is this the real reason that we need the 0x1000 ? */ + + printf_unfiltered ("%x:%s", event->lpBaseOfDll, dll_name); +#if 0 /* FIXME: Need to use RAPI stuff to read the file someday. */ + { + struct section_addr_info section_addrs; + memset (§ion_addrs, 0, sizeof (section_addrs)); + section_addrs.text_addr = (int) event->lpBaseOfDll + 0x1000; + symbol_file_add (dll_name, 0, §ion_addrs, 0, OBJF_SHARED); + } +#endif + printf_unfiltered ("\n"); + + return 1; +} + +/* 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 void +handle_output_debug_string (struct target_waitstatus *ourstatus) +{ + char p[256]; + char s[255]; + char *q; + gdb_wince_len nbytes_read; + gdb_wince_len nbytes = current_event.u.DebugString.nDebugStringLength; + + if (nbytes > 255) + nbytes = 255; + + memset (p, 0, sizeof (p)); + if (!read_process_memory (current_process_handle, + current_event.u.DebugString.lpDebugStringData, + &p, nbytes, &nbytes_read) + || !*p) + return; + + memset (s, 0, sizeof (s)); + WideCharToMultiByte (CP_ACP, 0, (LPCWSTR) p, (int) nbytes_read, s, + sizeof (s) - 1, NULL, NULL); + q = strchr (s, '\n'); + if (q != NULL) + { + *q = '\0'; + if (*--q = '\r') + *q = '\0'; + } + + warning (s); + return; +} + +/* Handle target exceptions. */ +static int +handle_exception (struct target_waitstatus *ourstatus) +{ + thread_info *th; + + if (current_event.u.Exception.dwFirstChance) + return 0; + + ourstatus->kind = TARGET_WAITKIND_STOPPED; + + /* Record the context of the current thread */ + th = thread_rec (current_event.dwThreadId, -1); + + switch (current_event.u.Exception.ExceptionRecord.ExceptionCode) + { + case EXCEPTION_ACCESS_VIOLATION: + DEBUG_EXCEPT (("gdb: Target exception ACCESS_VIOLATION at 0x%08x\n", + (unsigned) current_event.u.Exception.ExceptionRecord.ExceptionAddress)); + ourstatus->value.sig = TARGET_SIGNAL_SEGV; + break; + case STATUS_STACK_OVERFLOW: + DEBUG_EXCEPT (("gdb: Target exception STACK_OVERFLOW at 0x%08x\n", + (unsigned) current_event.u.Exception.ExceptionRecord.ExceptionAddress)); + ourstatus->value.sig = TARGET_SIGNAL_SEGV; + break; + case EXCEPTION_BREAKPOINT: + DEBUG_EXCEPT (("gdb: Target exception BREAKPOINT at 0x%08x\n", + (unsigned) current_event.u.Exception.ExceptionRecord.ExceptionAddress)); + ourstatus->value.sig = TARGET_SIGNAL_TRAP; + break; + case DBG_CONTROL_C: + DEBUG_EXCEPT (("gdb: Target exception CONTROL_C at 0x%08x\n", + (unsigned) current_event.u.Exception.ExceptionRecord.ExceptionAddress)); + ourstatus->value.sig = TARGET_SIGNAL_INT; + /* User typed CTRL-C. Continue with this status */ + last_sig = SIGINT; /* FIXME - should check pass state */ + break; + case EXCEPTION_SINGLE_STEP: + DEBUG_EXCEPT (("gdb: Target exception SINGLE_STEP at 0x%08x\n", + (unsigned) current_event.u.Exception.ExceptionRecord.ExceptionAddress)); + ourstatus->value.sig = TARGET_SIGNAL_TRAP; + break; + default: + /* This may be a structured exception handling exception. In + that case, we want to let the program try to handle it, and + only break if we see the exception a second time. */ + + printf_unfiltered ("gdb: unknown target exception 0x%08x at 0x%08x\n", + current_event.u.Exception.ExceptionRecord.ExceptionCode, + current_event.u.Exception.ExceptionRecord.ExceptionAddress); + ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; + break; + } + exception_count++; + 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=%d, ctid=%d, DBG_CONTINUE);\n", + (unsigned) current_event.dwProcessId, (unsigned) current_event.dwThreadId)); + res = continue_debug_event (current_event.dwProcessId, + current_event.dwThreadId, + continue_status); + if (res) + for (th = &thread_head; (th = th->next) != NULL;) + if (((id == -1) || (id == th->id)) && th->suspend_count) + { + for (i = 0; i < th->suspend_count; i++) + (void) resume_thread (th->h); + th->suspend_count = 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, DWORD * event_code, int *retval) +{ + BOOL debug_event; + DWORD continue_status; + int breakout = 1; + + if (!(debug_event = wait_for_debug_event (¤t_event, 1000))) + { + breakout = *retval = *event_code = 0; + goto out; + } + + this_thread = thread_rec (current_event.dwThreadId, FALSE); + event_count++; + continue_status = DBG_CONTINUE; + *retval = 0; + switch (*event_code = current_event.dwDebugEventCode) + { + 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")); + /* Record the existence of this thread */ + child_add_thread (current_event.dwThreadId, + current_event.u.CreateThread.hThread); + if (info_verbose) + printf_unfiltered ("[New %s]\n", + target_pid_to_str (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")); + child_delete_thread (current_event.dwThreadId); + 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")); + current_process_handle = current_event.u.CreateProcessInfo.hProcess; + + main_thread_id = inferior_pid = current_event.dwThreadId; + /* Add the main thread */ + current_thread = child_add_thread (inferior_pid, + current_event.u.CreateProcessInfo.hThread); + 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")); + ourstatus->kind = TARGET_WAITKIND_EXITED; + ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode; + close_handle (current_process_handle); + *retval = current_event.dwProcessId; + goto out; + + 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")); + catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL); + registers_changed (); /* mark all regs invalid */ + 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")); + break; /* FIXME: don't know what to do here */ + + 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 (handle_exception (ourstatus)) + { + char buf[32]; + *retval = current_event.dwThreadId; + remote_read_bytes (read_pc (), buf, sizeof (buf)); + dcache_xfer_memory (remote_dcache, read_pc (), buf, sizeof (buf), 0); + goto out; + } + continue_status = DBG_EXCEPTION_NOT_HANDLED; + 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")); + handle_output_debug_string (ourstatus); + break; + default: + printf_unfiltered ("gdb: kernel event for pid=%d tid=%d\n", + current_event.dwProcessId, + current_event.dwThreadId); + printf_unfiltered (" unknown event code %d\n", + current_event.dwDebugEventCode); + break; + } + + breakout = 0; + CHECK (child_continue (continue_status, -1)); + +out: + return breakout; +} + +/* Wait for interesting events to occur in the target process. */ +static int +child_wait (int pid, struct target_waitstatus *ourstatus) +{ + DWORD event_code; + int retval; + + /* 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) + if (get_child_debug_event (pid, ourstatus, &event_code, &retval)) + return retval; + else + { + int detach = 0; + + if (ui_loop_hook != NULL) + detach = ui_loop_hook (0); + + if (detach) + child_kill_inferior (); + } +} + +/* Print status information about what we're accessing. */ + +static void +child_files_info (ignore) + struct target_ops *ignore; +{ + printf_unfiltered ("\tUsing the running image of child %s.\n", + target_pid_to_str (inferior_pid)); +} + +/* ARGSUSED */ +static void +child_open (arg, from_tty) + char *arg; + int from_tty; +{ + error ("Use the \"run\" command to start a child process."); +} + +#define FACTOR (0x19db1ded53ea710LL) +#define NSPERSEC 10000000 + +/* Convert a Win32 time to "UNIX" format. */ +long +to_time_t (FILETIME * ptr) +{ + /* A file time is the number of 100ns since jan 1 1601 + stuffed into two long words. + A time_t is the number of seconds since jan 1 1970. */ + + long rem; + long long x = ((long long) ptr->dwHighDateTime << 32) + ((unsigned) ptr->dwLowDateTime); + x -= FACTOR; /* number of 100ns between 1601 and 1970 */ + rem = x % ((long long) NSPERSEC); + rem += (NSPERSEC / 2); + x /= (long long) NSPERSEC; /* number of 100ns in a second */ + x += (long long) (rem / NSPERSEC); + return x; +} + +/* Upload a file to the remote device depending on the user's + 'set remoteupload' specification. */ +char * +upload_to_device (const char *to, const char *from) +{ + HANDLE h; + const char *dir = remote_directory ? : "\\gdb"; + int len; + static char *remotefile = NULL; + LPWSTR wstr; + char *p; + DWORD err; + const char *in_to = to; + FILETIME ctime, atime, wtime; + struct stat st; + int fd; + + /* Look for a path separator and only use trailing part. */ + while ((p = strpbrk (to, "/\\")) != NULL) + to = p + 1; + + if (!*to) + error ("no filename found to upload - %s.", in_to); + + len = strlen (dir) + strlen (to) + 2; + remotefile = (char *) realloc (remotefile, len); + strcpy (remotefile, dir); + strcat (remotefile, "\\"); + strcat (remotefile, to); + + if (upload_when == UPLOAD_NEVER) + return remotefile; /* Don't bother uploading. */ + + /* Open the source. */ + if ((fd = openp (getenv ("PATH"), TRUE, (char *) from, O_RDONLY, 0, NULL)) < 0) + error ("couldn't open %s", from); + + /* Get the time for later comparison. */ + if (fstat (fd, &st)) + st.st_mtime = (time_t) - 1; + + /* Always attempt to create the directory on the remote system. */ + wstr = towide (dir, NULL); + (void) CeCreateDirectory (wstr, NULL); + + /* Attempt to open the remote file, creating it if it doesn't exist. */ + wstr = towide (remotefile, NULL); + h = CeCreateFile (wstr, GENERIC_READ | GENERIC_WRITE, 0, NULL, + OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); + + /* Some kind of problem? */ + err = CeGetLastError (); + if (h == NULL) + error ("error creating file to \"%s\". Windows error %d.", + remotefile, err); + + /* See if we need to upload the file. */ + if (upload_when == UPLOAD_ALWAYS || + err != ERROR_ALREADY_EXISTS || + !CeGetFileTime (h, &ctime, &atime, &wtime) || + to_time_t (&wtime) < st.st_mtime) + { + DWORD nbytes; + char buf[4096]; + int n; + + /* Upload the file. */ + while ((n = read (fd, buf, sizeof (buf))) > 0) + if (!CeWriteFile (h, buf, (DWORD) n, &nbytes, NULL)) + error ("error writing to remote device - %d.", + CeGetLastError ()); + } + + close (fd); + CeCloseHandle (h); + + return remotefile; +} + +/* Initialize the connection to the remote device. */ +static void +wince_initialize () +{ + int tmp; + char args[256]; + char *hostname; + struct sockaddr_in sin; + char *stub_file_name; + int s0; + PROCESS_INFORMATION pi; + + if (!connection_initialized) + switch (CeRapiInit ()) + { + case 0: + connection_initialized = 1; + break; + default: + CeRapiUninit (); + error ("Can't initialize connection to remote device.\n"); + break; + } + + /* Upload the stub to the handheld device. */ + stub_file_name = upload_to_device ("wince-stub.exe", WINCE_STUB); + strcpy (args, stub_file_name); + + if (remote_add_host) + { + strcat (args, " "); + hostname = strchr (args, '\0'); + if (gethostname (hostname, sizeof (args) - strlen (args))) + error ("couldn't get hostname of this system."); + } + + /* Get a socket. */ + if ((s0 = socket (AF_INET, SOCK_STREAM, 0)) < 0) + stub_error ("Couldn't connect to host system."); + + /* Allow rapid reuse of the port. */ + tmp = 1; + (void) setsockopt (s0, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, sizeof (tmp)); + + + /* Set up the information for connecting to the host gdb process. */ + memset (&sin, 0, sizeof (sin)); + sin.sin_family = AF_INET; + sin.sin_port = htons (7000); /* FIXME: This should be configurable */ + + if (bind (s0, (struct sockaddr *) &sin, sizeof (sin))) + error ("couldn't bind socket"); + + if (listen (s0, 1)) + error ("Couldn't open socket for listening.\n"); + + /* Start up the stub on the remote device. */ + if (!CeCreateProcess (towide (stub_file_name, NULL), towide (args, NULL), + NULL, NULL, 0, 0, NULL, NULL, NULL, &pi)) + error ("Unable to start remote stub '%s'. Windows CE error %d.", + stub_file_name, CeGetLastError ()); + + /* Wait for a connection */ + + if ((s = accept (s0, NULL, NULL)) < 0) + error ("couldn't set up server for connection."); + + close (s0); +} + +/* Start an inferior win32 child process and sets inferior_pid 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 *args, char **env) +{ + PROCESS_INFORMATION pi; + struct target_waitstatus dummy; + int ret; + DWORD flags, event_code; + char *exec_and_args; + + if (!exec_file) + error ("No executable specified, use `target exec'.\n"); + + flags = DEBUG_PROCESS; + + wince_initialize (); /* Make sure we've got a connection. */ + if (!remote_dcache) + remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes); + else + dcache_flush (remote_dcache); + + exec_file = upload_to_device (exec_file, exec_file); + + while (*args == ' ') + args++; + + /* Allocate space for "command<sp>args" */ + if (*args == '\0') + { + exec_and_args = alloca (strlen (exec_file) + 1); + strcpy (exec_and_args, exec_file); + } + else + { + exec_and_args = alloca (strlen (exec_file + strlen (args) + 2)); + sprintf (exec_and_args, "%s %s", exec_file, args); + } + + memset (&pi, 0, sizeof (pi)); + /* Execute the process */ + if (!create_process (exec_file, exec_and_args, flags, &pi)) + error ("Error creating process %s, (error %d)\n", exec_file, GetLastError ()); + + exception_count = 0; + event_count = 0; + + current_process_handle = pi.hProcess; + current_event.dwProcessId = pi.dwProcessId; + memset (¤t_event, 0, sizeof (current_event)); + inferior_pid = current_event.dwThreadId = pi.dwThreadId; + push_target (&child_ops); + child_init_thread_list (); + child_add_thread (pi.dwThreadId, pi.hThread); + init_wait_for_inferior (); + clear_proceed_status (); + target_terminal_init (); + target_terminal_inferior (); + + + /* Run until process and threads are loaded */ + do + get_child_debug_event (inferior_pid, &dummy, &event_code, &ret); + while (event_code != CREATE_PROCESS_DEBUG_EVENT); + + proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); +} + +/* Chile has gone bye-bye. */ +static void +child_mourn_inferior () +{ + (void) child_continue (DBG_CONTINUE, -1); + unpush_target (&child_ops); + stop_stub (); + CeRapiUninit (); + connection_initialized = 0; + generic_mourn_inferior (); +} + +/* Move memory from child to/from gdb. */ +int +child_xfer_memory (CORE_ADDR memaddr, char *our, int len, + int write, struct target_ops *target) +{ + if (len <= 0) + return 0; + return dcache_xfer_memory (remote_dcache, memaddr, our, len, write); +} + +/* Terminate the process and wait for child to tell us it has completed. */ +void +child_kill_inferior (void) +{ + CHECK (terminate_process (current_process_handle)); + + for (;;) + { + if (!child_continue (DBG_CONTINUE, -1)) + break; + if (!wait_for_debug_event (¤t_event, INFINITE)) + break; + if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) + break; + } + + CHECK (close_handle (current_process_handle)); + close_handle (current_thread->h); + target_mourn_inferior (); /* or just child_mourn_inferior? */ +} + +#ifdef MIPS +static void +undoSStep (thread_info * th) +{ + if (th->stepped) + { + memory_remove_breakpoint (th->step_pc, (void *) &th->step_prev); + th->stepped = 0; + } +} + +void +wince_software_single_step (unsigned int ignore, int insert_breakpoints_p) +{ + unsigned long pc; + thread_info *th = current_thread; /* Info on currently selected thread */ + CORE_ADDR mips_next_pc (CORE_ADDR pc); + + if (!insert_breakpoints_p) + { + undoSStep (th); + return; + } + + th->stepped = 1; + pc = read_register (PC_REGNUM); + th->step_pc = mips_next_pc (pc); + th->step_prev = 0; + memory_insert_breakpoint (th->step_pc, (void *) &th->step_prev); +} +#elif SHx +/* Hitachi SH architecture instruction encoding masks */ + +#define COND_BR_MASK 0xff00 +#define UCOND_DBR_MASK 0xe000 +#define UCOND_RBR_MASK 0xf0df +#define TRAPA_MASK 0xff00 + +#define COND_DISP 0x00ff +#define UCOND_DISP 0x0fff +#define UCOND_REG 0x0f00 + +/* Hitachi SH instruction opcodes */ + +#define BF_INSTR 0x8b00 +#define BT_INSTR 0x8900 +#define BRA_INSTR 0xa000 +#define BSR_INSTR 0xb000 +#define JMP_INSTR 0x402b +#define JSR_INSTR 0x400b +#define RTS_INSTR 0x000b +#define RTE_INSTR 0x002b +#define TRAPA_INSTR 0xc300 +#define SSTEP_INSTR 0xc3ff + + +#define T_BIT_MASK 0x0001 + +/* Undo the effect of a previous doSStep. If we single stepped, + restore the old instruction. */ + +static void +undoSStep (thread_info * th) +{ + if (th->stepped) + { + gdb_wince_len done; + write_process_memory (current_process_handle, (LPVOID) th->step_pc, + (LPVOID) & th->step_instr, sizeof (short), &done); + if (done != sizeof (short)) + error ("error unsetting single step."); + th->stepped = 0; + } +} + +/* Single step (in a painstaking fashion) by inspecting the current + instruction and setting a breakpoint on the "next" instruction + which would be executed. This code hails from sh-stub.c. + */ +void +wince_software_single_step (unsigned int ignore, int insert_breakpoints_p) +{ + thread_info *th = current_thread; /* Info on currently selected thread */ + + if (!insert_breakpoints_p) + undoSStep (th); + else + { + short *instrMem; + int displacement; + int reg; + unsigned short opcode; + gdb_wince_len done; + LPCONTEXT c = &th->context; + + instrMem = (short *) c->Fir; + + read_process_memory (current_process_handle, (LPCVOID) c->Fir, &opcode, + sizeof (opcode), &done); + if (done != sizeof (opcode)) + error ("couldn't retrieve opcode"); + th->stepped = 1; + + if ((opcode & COND_BR_MASK) == BT_INSTR) + { + if (c->Psr & T_BIT_MASK) + { + displacement = (opcode & COND_DISP) << 1; + if (displacement & 0x80) + displacement |= 0xffffff00; + /* + * Remember PC points to second instr. + * after PC of branch ... so add 4 + */ + instrMem = (short *) (c->Fir + displacement + 4); + } + else + instrMem += 1; + } + else if ((opcode & COND_BR_MASK) == BF_INSTR) + { + if (c->Psr & T_BIT_MASK) + instrMem += 1; + else + { + displacement = (opcode & COND_DISP) << 1; + if (displacement & 0x80) + displacement |= 0xffffff00; + /* + * Remember PC points to second instr. + * after PC of branch ... so add 4 + */ + instrMem = (short *) (c->Fir + displacement + 4); + } + } + else if ((opcode & UCOND_DBR_MASK) == BRA_INSTR) + { + displacement = (opcode & UCOND_DISP) << 1; + if (displacement & 0x0800) + displacement |= 0xfffff000; + + /* + * Remember PC points to second instr. + * after PC of branch ... so add 4 + */ + instrMem = (short *) (c->Fir + displacement + 4); + } + else if ((opcode & UCOND_RBR_MASK) == JSR_INSTR) + { + reg = (char) ((opcode & UCOND_REG) >> 8); + + instrMem = (short *) *regptr (c, reg); + } + else if (opcode == RTS_INSTR) + instrMem = (short *) c->PR; + else if (opcode == RTE_INSTR) + instrMem = (short *) *regptr (c, 15); + else if ((opcode & TRAPA_MASK) == TRAPA_INSTR) + instrMem = (short *) ((opcode & ~TRAPA_MASK) << 2); + else + instrMem += 1; + + th->step_pc = (CORE_ADDR) instrMem; + + read_process_memory (current_process_handle, (LPVOID) instrMem, + (LPVOID) & th->step_instr, sizeof (short), &done); + opcode = SSTEP_INSTR; + write_process_memory (current_process_handle, (LPVOID) instrMem, + (LPVOID) & opcode, sizeof (short), &done); + } +} +#elif defined (ARM) +/* Single step (in a painstaking fashion) by inspecting the current + instruction and setting a breakpoint on the "next" instruction + which would be executed. This code hails from sh-stub.c. + */ +static void +undoSStep (thread_info * th) +{ + if (th->stepped) + { + memory_remove_breakpoint (th->step_pc, (void *) &th->step_prev); + th->stepped = 0; + } +} + +void +wince_software_single_step (unsigned int ignore, int insert_breakpoints_p) +{ + unsigned long pc; + thread_info *th = current_thread; /* Info on currently selected thread */ + CORE_ADDR mips_next_pc (CORE_ADDR pc); + + if (!insert_breakpoints_p) + { + undoSStep (th); + return; + } + + th->stepped = 1; + pc = read_register (PC_REGNUM); + th->step_pc = arm_get_next_pc (pc); + th->step_prev = 0; + memory_insert_breakpoint (th->step_pc, (void *) &th->step_prev); +} +#endif + +/* Resume the child after an exception. */ +void +child_resume (int pid, int step, enum target_signal sig) +{ + thread_info *th; + DWORD continue_status = last_sig > 0 && last_sig < NSIG ? + DBG_EXCEPTION_NOT_HANDLED : DBG_CONTINUE; + + 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->context.ContextFlags) + { + CHECK (set_thread_context (th->h, &th->context)); + th->context.ContextFlags = 0; + } + + dcache_flush (remote_dcache); + + /* Allow continuing with the same signal that interrupted us. + Otherwise complain. */ + if (sig && sig != last_sig) + fprintf_unfiltered (gdb_stderr, "Can't send signals to the child. signal %d\n", sig); + + last_sig = 0; + child_continue (continue_status, pid); +} + +static void +child_prepare_to_store () +{ + /* Do nothing, since we can store individual regs */ +} + +static int +child_can_run () +{ + return 1; +} + +static void +child_close () +{ + DEBUG_EVENTS (("gdb: child_close, inferior_pid=%d\n", inferior_pid)); +} + +/* Explicitly upload file to remotedir */ + +static void +child_load (char *file, int from_tty) +{ + upload_to_device (file, file); +} + +struct target_ops child_ops; + +static void +init_child_ops (void) +{ + memset (&child_ops, 0, sizeof (child_ops)); + child_ops.to_shortname = (char *) "child"; + child_ops.to_longname = (char *) "Windows CE process"; + child_ops.to_doc = (char *) "Windows CE process (started by the \"run\" command)."; + child_ops.to_open = child_open; + child_ops.to_close = child_close; + 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 = child_load; + 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_thread_alive = win32_child_thread_alive; + child_ops.to_stratum = process_stratum; + 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; +} + + +/* Handle 'set remoteupload' parameter. */ + +#define replace_upload(what) \ + upload_when = UPLOAD_NEWER; \ + remote_upload = realloc (remote_upload, strlen (upload_options[upload_when].name)); \ + strcpy (remote_upload, upload_options[upload_when].name); + +static void +set_upload_type (char *ignore, int from_tty) +{ + int i, len; + char *bad_option; + + if (!remote_upload || !remote_upload[0]) + { + replace_upload (UPLOAD_NEWER); + if (from_tty) + printf_unfiltered ("Upload upload_options are: always, newer, never.\n"); + return; + } + + len = strlen (remote_upload); + for (i = 0; i < (sizeof (upload_options) / sizeof (upload_options[0])); i++) + if (len >= upload_options[i].abbrev && + strncasecmp (remote_upload, upload_options[i].name, len) == 0) + { + remote_upload = (char *) upload_options[i].name; + upload_when = i; + return; + } + + bad_option = remote_upload; + replace_upload (UPLOAD_NEWER); + error ("Unknown upload type: %s.", bad_option); +} + +void +_initialize_inftarg () +{ + struct cmd_list_element *set; + init_child_ops (); + + add_show_from_set + (add_set_cmd ((char *) "remotedirectory", no_class, + var_string_noescape, (char *) &remote_directory, + (char *) "Set directory for remote upload.\n", + &setlist), + &showlist); + remote_directory = xstrdup (remote_directory); + + set = add_set_cmd ((char *) "remoteupload", no_class, + var_string_noescape, (char *) &remote_upload, + (char *) "Set how to upload executables to remote device.\n", + &setlist); + add_show_from_set (set, &showlist); + set->function.cfunc = set_upload_type; + set_upload_type (NULL, 0); + set_dcache_state (1); + + add_show_from_set + (add_set_cmd ((char *) "debugexec", class_support, var_boolean, + (char *) &debug_exec, + (char *) "Set whether to display execution in child process.", + &setlist), + &showlist); + + add_show_from_set + (add_set_cmd ((char *) "remoteaddhost", class_support, var_boolean, + (char *) &remote_add_host, + (char *) "Set whether to add this host to remote stub arguments for\n +debugging over a network.", &setlist), + &showlist); + + add_show_from_set + (add_set_cmd ((char *) "debugevents", class_support, var_boolean, + (char *) &debug_events, + (char *) "Set whether to display kernel events in child process.", + &setlist), + &showlist); + + add_show_from_set + (add_set_cmd ((char *) "debugmemory", class_support, var_boolean, + (char *) &debug_memory, + (char *) "Set whether to display memory accesses in child process.", + &setlist), + &showlist); + + add_show_from_set + (add_set_cmd ((char *) "debugexceptions", class_support, var_boolean, + (char *) &debug_exceptions, + (char *) "Set whether to display kernel exceptions in child process.", + &setlist), + &showlist); + + add_target (&child_ops); +} + +/* 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 (int pid) +{ + return thread_alive (thread_rec (pid, FALSE)->h); +} + +/* Convert pid to printable format. */ +char * +cygwin_pid_to_str (int pid) +{ + static char buf[80]; + if (pid == current_event.dwProcessId) + sprintf (buf, "process %d", pid); + else + sprintf (buf, "thread %d.0x%x", (unsigned) current_event.dwProcessId, pid); + return buf; +} |