PATCH: more ppc

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Hi,

I am still wondering where "pc" is in that CONTEXT struct, I am using 
Fill[0] for now.

New file server/context_powerpc.c is attached.

Ciao, Marcus

License: LGPL
Changelog:
	Implemented server context/ptrace handling for Linux/PowerPC.

Index: server/Makefile.in
===================================================================
RCS file: /home/wine/wine/server/Makefile.in,v
retrieving revision 1.33
diff -u -r1.33 Makefile.in
--- Makefile.in	9 May 2002 04:31:40 -0000	1.33
+++ Makefile.in	5 Aug 2002 11:59:28 -0000
@@ -11,6 +11,7 @@
 	change.c \
 	console.c \
 	context_i386.c \
+	context_powerpc.c \
 	context_sparc.c \
 	debugger.c \
 	device.c \
Index: dlls/ntdll/exception.c
===================================================================
RCS file: /home/wine/wine/dlls/ntdll/exception.c,v
retrieving revision 1.45
diff -u -r1.45 exception.c
--- dlls/ntdll/exception.c	31 May 2002 23:25:49 -0000	1.45
+++ dlls/ntdll/exception.c	5 Aug 2002 12:01:06 -0000
@@ -46,11 +46,11 @@
 
 #ifdef __i386__
 # define GET_IP(context) ((LPVOID)(context)->Eip)
-#endif
-#ifdef __sparc__
+#elif defined(__sparc__)
 # define GET_IP(context) ((LPVOID)(context)->pc)
-#endif
-#ifndef GET_IP
+#elif defined(__powerpc__)
+# define GET_IP(context) ((LPVOID)(context)->Fill[0])
+#else
 # error You must define GET_IP for this CPU
 #endif
 
/*
 * PowerPC register context support
 *
 * Copyright (C) 2002 Marcus Meissner, SuSE Linux AG.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "config.h"

#ifdef __powerpc__

#include <assert.h>
#include <errno.h>
#include <sys/types.h>
#ifdef HAVE_SYS_REG_H
# include <sys/reg.h>
#endif
#include <unistd.h>
#ifdef HAVE_SYS_PTRACE_H
# include <sys/ptrace.h>
#endif

#include "winbase.h"

#include "thread.h"
#include "request.h"

/* retrieve a thread context */
static void get_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
{
    int pid = thread->unix_pid;
    if (flags & CONTEXT_FULL)
    {
        if (flags & CONTEXT_INTEGER)
        {
#define XREG(x,y) if (ptrace( PTRACE_PEEKUSER, pid, (void*)(x<<2), &context->y) == -1) goto error;
#define IREG(x) if (ptrace( PTRACE_PEEKUSER, pid, (void*)(x<<2), &context->Gpr##x) == -1) goto error;
	    IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
	    IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
	    IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
	    IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
	    IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
#undef IREG
	    XREG(37,Xer);
	    XREG(38,Cr);

        }
        if (flags & CONTEXT_CONTROL)
        {
	    XREG(33,Msr);
	    XREG(35,Ctr);

	    XREG(32,Fill[0]); /* misused for PC / nip */

	/* what is Iar? Lr? */
	    /*XREG(33*4,Iar);*/
	    /*XREG(33*4,Lr);*/
        }
    }
    if (flags & CONTEXT_FLOATING_POINT)
    {
#define FREG(x) if (ptrace( PTRACE_PEEKUSER, pid, (void*)((48+x*2)<<2), &context->Fpr##x) == -1) goto error;
	FREG(0);
	FREG(1);
	FREG(2);
	FREG(3);
	FREG(4);
	FREG(5);
	FREG(6);
	FREG(7);
	FREG(8);
	FREG(9);
	FREG(10);
	FREG(11);
	FREG(12);
	FREG(13);
	FREG(14);
	FREG(15);
	FREG(16);
	FREG(17);
	FREG(18);
	FREG(19);
	FREG(20);
	FREG(21);
	FREG(22);
	FREG(23);
	FREG(24);
	FREG(25);
	FREG(26);
	FREG(27);
	FREG(28);
	FREG(29);
	FREG(30);
	FREG(31);
	XREG((48+32*2),Fpscr);
    }
    return;
 error:
    file_set_error();
}
#undef XREG
#undef IREG
#undef FREG

#define XREG(x,y) if (ptrace( PTRACE_POKEUSER, pid, (void*)(x<<2), &context->y) == -1) goto error;
#define IREG(x) if (ptrace( PTRACE_POKEUSER, pid, (void*)(x<<2), &context->Gpr##x) == -1) goto error;
#define FREG(x) if (ptrace( PTRACE_POKEUSER, pid, (void*)((48+x*2)<<2), &context->Fpr##x) == -1) goto error;
/* set a thread context */
static void set_thread_context( struct thread *thread, unsigned int flags, const CONTEXT *context )
{
    int pid = thread->unix_pid;
    if (flags & CONTEXT_FULL)
    {
        if (flags & CONTEXT_INTEGER)
        {
	    IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
	    IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
	    IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
	    IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
	    IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
	    XREG(37,Xer);
	    XREG(38,Cr);

        }
        if (flags & CONTEXT_CONTROL)
        {
	    XREG(33,Msr);
	    XREG(35,Ctr);

	    XREG(32,Fill[0]); /* misused for PC / nip */

	/* what is Iar? Lr? */
	    /*XREG(33*4,Iar);*/
	    /*XREG(33*4,Lr);*/
        }
    }
    if (flags & CONTEXT_FLOATING_POINT)
    {
	FREG(0);
	FREG(1);
	FREG(2);
	FREG(3);
	FREG(4);
	FREG(5);
	FREG(6);
	FREG(7);
	FREG(8);
	FREG(9);
	FREG(10);
	FREG(11);
	FREG(12);
	FREG(13);
	FREG(14);
	FREG(15);
	FREG(16);
	FREG(17);
	FREG(18);
	FREG(19);
	FREG(20);
	FREG(21);
	FREG(22);
	FREG(23);
	FREG(24);
	FREG(25);
	FREG(26);
	FREG(27);
	FREG(28);
	FREG(29);
	FREG(30);
	FREG(31);
#undef FREG
	XREG((48+32*2),Fpscr);
    }
    return;
 error:
    file_set_error();
}
#undef XREG
#undef IREG
#undef FREG

#define IREG(x) to->Gpr##x = from->Gpr##x;
#define FREG(x) to->Fpr##x = from->Fpr##x;
#define CREG(x) to->x = from->x;
/* copy a context structure according to the flags */
static void copy_context( CONTEXT *to, const CONTEXT *from, int flags )
{
    if (flags & CONTEXT_CONTROL)
    {
    	CREG(Msr);
    	CREG(Ctr);
    	CREG(Fill[0]);
    }
    if (flags & CONTEXT_INTEGER)
    {
	IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
	IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
	IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
	IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
	IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
	CREG(Xer);
	CREG(Cr);
    }
    if (flags & CONTEXT_FLOATING_POINT)
    {
	FREG(0);
	FREG(1);
	FREG(2);
	FREG(3);
	FREG(4);
	FREG(5);
	FREG(6);
	FREG(7);
	FREG(8);
	FREG(9);
	FREG(10);
	FREG(11);
	FREG(12);
	FREG(13);
	FREG(14);
	FREG(15);
	FREG(16);
	FREG(17);
	FREG(18);
	FREG(19);
	FREG(20);
	FREG(21);
	FREG(22);
	FREG(23);
	FREG(24);
	FREG(25);
	FREG(26);
	FREG(27);
	FREG(28);
	FREG(29);
	FREG(30);
	FREG(31);
	CREG(Fpscr);
    }
}

/* retrieve the current instruction pointer of a thread */
void *get_thread_ip( struct thread *thread )
{
    CONTEXT context;
    context.Fill[0] = 0;
    if (suspend_for_ptrace( thread ))
    {
        get_thread_context( thread, CONTEXT_CONTROL, &context );
        resume_thread( thread );
    }
    return (void *)context.Fill[0];
}

/* determine if we should continue the thread in single-step mode */
int get_thread_single_step( struct thread *thread )
{
    CONTEXT context;
    if (thread->context) return 0; 
    get_thread_context( thread, CONTEXT_CONTROL, &context );
#ifndef MSR_SE
# define MSR_SE (1<<10)
#endif
    return (context.Msr & MSR_SE) != 0;
}

/* retrieve the current context of a thread */
DECL_HANDLER(get_thread_context)
{
    struct thread *thread;
    void *data;
    int flags = req->flags;

    if (get_reply_max_size() < sizeof(CONTEXT))
    {
        set_error( STATUS_INVALID_PARAMETER );
        return;
    }
    if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;

    if ((data = set_reply_data_size( sizeof(CONTEXT) )))
    {
        if (thread->context)  /* thread is inside an exception event */
        {
            copy_context( data, thread->context, flags );
            flags = 0;
        }
        if (flags && suspend_for_ptrace( thread ))
        {
            get_thread_context( thread, flags, data );
            resume_thread( thread );
        }
    }
    release_object( thread );
}


/* set the current context of a thread */
DECL_HANDLER(set_thread_context)
{
    struct thread *thread;
    int flags = req->flags;

    if (get_req_data_size() < sizeof(CONTEXT))
    {
        set_error( STATUS_INVALID_PARAMETER );
        return;
    }
    if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
    {
        if (thread->context)  /* thread is inside an exception event */
        {
            copy_context( thread->context, get_req_data(), flags );
            flags = 0;
        }
        if (flags && suspend_for_ptrace( thread ))
        {
            set_thread_context( thread, flags, get_req_data() );
            resume_thread( thread );
        }
        release_object( thread );
    }
}

#endif  /* __sparc__ */

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