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Samuel Bronson <naesten@gmail.com>:

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Reduce the time it takes GDB to attach

svn path=/trunk/; revision=17422
This commit is contained in:
Gé van Geldorp 2005-08-17 07:23:05 +00:00
parent 76f11b5f23
commit 598f28ffad
1 changed files with 43 additions and 28 deletions
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71
reactos/ntoskrnl/kd/wrappers/gdbstub.c
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@ -242,6 +242,7 @@ GspGetPacket()
{ {
GdbPutChar ('+'); /* successful transfer */ GdbPutChar ('+'); /* successful transfer */
#if 0
/* if a sequence char is present, reply the sequence ID */ /* if a sequence char is present, reply the sequence ID */
if (Buffer[2] == ':') if (Buffer[2] == ':')
{ {
@ -250,6 +251,7 @@ GspGetPacket()
return &Buffer[3]; return &Buffer[3];
} }
#endif
return &Buffer[0]; return &Buffer[0];
} }
@ -860,10 +862,12 @@ GspQuery(PCHAR Request)
GspMem2Hex ((PCHAR) &ThreadCount, &GspOutBuffer[2], 1, TRUE); GspMem2Hex ((PCHAR) &ThreadCount, &GspOutBuffer[2], 1, TRUE);
} }
#endif #endif
#if 0
else if (strncmp (Command, "Offsets", 7) == 0) else if (strncmp (Command, "Offsets", 7) == 0)
{ {
strcpy (GspOutBuffer, "Text=0;Data=0;Bss=0"); strcpy (GspOutBuffer, "Text=0;Data=0;Bss=0");
} }
#endif
} }
VOID VOID
@ -1064,6 +1068,7 @@ GspSetHwBreakpoint(ULONG BreakpointNumber,
} }
static BOOL gdb_attached_yet = TRUE;
/* /*
* This function does all command procesing for interfacing to gdb. * This function does all command procesing for interfacing to gdb.
*/ */
@ -1079,7 +1084,6 @@ KdpGdbEnterDebuggerException(PEXCEPTION_RECORD ExceptionRecord,
LONG SigVal; LONG SigVal;
LONG NewPC; LONG NewPC;
PCHAR ptr; PCHAR ptr;
LONG Esp;
/* FIXME: Stop on other CPUs too */ /* FIXME: Stop on other CPUs too */
/* Disable hardware debugging while we are inside the stub */ /* Disable hardware debugging while we are inside the stub */
@ -1098,7 +1102,7 @@ KdpGdbEnterDebuggerException(PEXCEPTION_RECORD ExceptionRecord,
{ {
GspAccessLocation = NULL; GspAccessLocation = NULL;
GspMemoryError = TRUE; GspMemoryError = TRUE;
TrapFrame->Eip += 2; TrapFrame->Eip += 3;
} }
else else
{ {
@ -1111,36 +1115,45 @@ KdpGdbEnterDebuggerException(PEXCEPTION_RECORD ExceptionRecord,
GspDbgThread = NULL; GspDbgThread = NULL;
} }
/* reply to host that an exception has occurred */ /* ugly hack to avoid attempting to send status at the very
SigVal = GspComputeSignal (ExceptionRecord->ExceptionCode); * beginning, right when GDB is trying to query the stub */
if (gdb_attached_yet) {
LONG Esp;
stop_reply:
/* reply to host that an exception has occurred */
SigVal = GspComputeSignal (ExceptionRecord->ExceptionCode);
ptr = &GspOutBuffer[0];
ptr = &GspOutBuffer[0]; *ptr++ = 'T'; /* notify gdb with signo, PC, FP and SP */
*ptr++ = HexChars[(SigVal >> 4) & 0xf];
*ptr++ = HexChars[SigVal & 0xf];
*ptr++ = 'T'; /* notify gdb with signo, PC, FP and SP */ *ptr++ = HexChars[ESP];
*ptr++ = HexChars[(SigVal >> 4) & 0xf]; *ptr++ = ':';
*ptr++ = HexChars[SigVal & 0xf];
Esp = GspGetEspFromTrapFrame (TrapFrame); /* SP */
ptr = GspMem2Hex ((PCHAR) &Esp, ptr, 4, 0);
*ptr++ = ';';
*ptr++ = HexChars[EBP];
*ptr++ = ':';
ptr = GspMem2Hex ((PCHAR) &TrapFrame->Ebp, ptr, 4, 0); /* FP */
*ptr++ = ';';
*ptr++ = HexChars[PC];
*ptr++ = ':';
ptr = GspMem2Hex((PCHAR) &TrapFrame->Eip, ptr, 4, 0); /* PC */
*ptr++ = ';';
*ptr++ = HexChars[ESP]; *ptr = '\0';
*ptr++ = ':';
Esp = GspGetEspFromTrapFrame (TrapFrame); /* SP */
ptr = GspMem2Hex ((PCHAR) &Esp, ptr, 4, 0);
*ptr++ = ';';
*ptr++ = HexChars[EBP];
*ptr++ = ':';
ptr = GspMem2Hex ((PCHAR) &TrapFrame->Ebp, ptr, 4, 0); /* FP */
*ptr++ = ';';
*ptr++ = HexChars[PC];
*ptr++ = ':';
ptr = GspMem2Hex((PCHAR) &TrapFrame->Eip, ptr, 4, 0); /* PC */
*ptr++ = ';';
*ptr = '\0';
GspPutPacket (&GspOutBuffer[0]);
GspPutPacket (&GspOutBuffer[0]);
} else {
gdb_attached_yet = 1;
}
Stepping = FALSE; Stepping = FALSE;
while (TRUE) while (TRUE)
@ -1152,6 +1165,8 @@ KdpGdbEnterDebuggerException(PEXCEPTION_RECORD ExceptionRecord,
switch (*ptr++) switch (*ptr++)
{ {
case '?': case '?':
/* a little hack to send more complete status information */
goto stop_reply;
GspOutBuffer[0] = 'S'; GspOutBuffer[0] = 'S';
GspOutBuffer[1] = HexChars[SigVal >> 4]; GspOutBuffer[1] = HexChars[SigVal >> 4];
GspOutBuffer[2] = HexChars[SigVal % 16]; GspOutBuffer[2] = HexChars[SigVal % 16];