298 lines
6.9 KiB
C
298 lines
6.9 KiB
C
/*
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* PowerPC register context support
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*
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* Copyright (C) 2002 Marcus Meissner, SuSE Linux AG.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#ifdef __powerpc__
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#include <assert.h>
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#include <errno.h>
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#include <sys/types.h>
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#ifdef HAVE_SYS_REG_H
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# include <sys/reg.h>
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#endif
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#include <stdarg.h>
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#include <unistd.h>
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#ifdef HAVE_SYS_PTRACE_H
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# include <sys/ptrace.h>
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#endif
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#ifndef PTRACE_PEEKUSER
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# ifdef PT_READ_D
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# define PTRACE_PEEKUSER PT_READ_D
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# endif
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#endif /* PTRACE_PEEKUSER */
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#ifndef PTRACE_POKEUSER
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# ifdef PT_WRITE_D
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# define PTRACE_POKEUSER PT_WRITE_D
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# endif
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#endif /* PTRACE_POKEUSER */
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#include "windef.h"
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#include "file.h"
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#include "thread.h"
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#include "request.h"
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/* retrieve a thread context */
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static void get_thread_context_ptrace( struct thread *thread, unsigned int flags, CONTEXT *context )
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{
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int pid = get_ptrace_pid(thread);
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if (flags & CONTEXT_INTEGER)
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{
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#define XREG(x,y) if (ptrace( PTRACE_PEEKUSER, pid, (void*)(x<<2), &context->y) == -1) goto error;
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#define IREG(x) if (ptrace( PTRACE_PEEKUSER, pid, (void*)(x<<2), &context->Gpr##x) == -1) goto error;
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IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
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IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
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IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
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IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
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IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
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#undef IREG
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XREG(37,Xer);
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XREG(38,Cr);
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context->ContextFlags |= CONTEXT_INTEGER;
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}
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if (flags & CONTEXT_CONTROL)
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{
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XREG(32,Iar);
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XREG(33,Msr);
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XREG(35,Ctr);
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XREG(36,Lr); /* 36 is LNK ... probably Lr ? */
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context->ContextFlags |= CONTEXT_CONTROL;
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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#define FREG(x) if (ptrace( PTRACE_PEEKUSER, pid, (void*)((48+x*2)<<2), &context->Fpr##x) == -1) goto error;
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FREG(0);
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FREG(1);
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FREG(2);
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FREG(3);
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FREG(4);
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FREG(5);
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FREG(6);
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FREG(7);
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FREG(8);
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FREG(9);
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FREG(10);
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FREG(11);
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FREG(12);
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FREG(13);
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FREG(14);
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FREG(15);
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FREG(16);
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FREG(17);
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FREG(18);
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FREG(19);
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FREG(20);
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FREG(21);
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FREG(22);
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FREG(23);
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FREG(24);
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FREG(25);
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FREG(26);
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FREG(27);
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FREG(28);
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FREG(29);
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FREG(30);
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FREG(31);
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XREG((48+32*2),Fpscr);
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context->ContextFlags |= CONTEXT_FLOATING_POINT;
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}
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return;
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error:
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file_set_error();
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}
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#undef XREG
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#undef IREG
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#undef FREG
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#define XREG(x,y) if (ptrace( PTRACE_POKEUSER, pid, (void*)(x<<2), &context->y) == -1) goto error;
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#define IREG(x) if (ptrace( PTRACE_POKEUSER, pid, (void*)(x<<2), &context->Gpr##x) == -1) goto error;
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#define FREG(x) if (ptrace( PTRACE_POKEUSER, pid, (void*)((48+x*2)<<2), &context->Fpr##x) == -1) goto error;
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/* set a thread context */
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static void set_thread_context_ptrace( struct thread *thread, unsigned int flags, const CONTEXT *context )
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{
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int pid = get_ptrace_pid(thread);
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if (flags & CONTEXT_FULL)
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{
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if (flags & CONTEXT_INTEGER)
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{
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IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
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IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
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IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
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IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
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IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
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XREG(37,Xer);
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XREG(38,Cr);
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}
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if (flags & CONTEXT_CONTROL)
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{
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XREG(32,Iar);
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XREG(33,Msr);
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XREG(35,Ctr);
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XREG(36,Lr);
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}
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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FREG(0);
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FREG(1);
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FREG(2);
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FREG(3);
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FREG(4);
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FREG(5);
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FREG(6);
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FREG(7);
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FREG(8);
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FREG(9);
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FREG(10);
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FREG(11);
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FREG(12);
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FREG(13);
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FREG(14);
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FREG(15);
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FREG(16);
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FREG(17);
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FREG(18);
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FREG(19);
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FREG(20);
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FREG(21);
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FREG(22);
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FREG(23);
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FREG(24);
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FREG(25);
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FREG(26);
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FREG(27);
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FREG(28);
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FREG(29);
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FREG(30);
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FREG(31);
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#undef FREG
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XREG((48+32*2),Fpscr);
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}
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return;
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error:
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file_set_error();
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}
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#undef XREG
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#undef IREG
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#undef FREG
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#define IREG(x) to->Gpr##x = from->Gpr##x;
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#define FREG(x) to->Fpr##x = from->Fpr##x;
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#define CREG(x) to->x = from->x;
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/* copy a context structure according to the flags */
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static void copy_context( CONTEXT *to, const CONTEXT *from, unsigned int flags )
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{
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if (flags & CONTEXT_CONTROL)
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{
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CREG(Msr);
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CREG(Ctr);
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CREG(Iar);
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to->ContextFlags |= CONTEXT_CONTROL;
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}
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if (flags & CONTEXT_INTEGER)
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{
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IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
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IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
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IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
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IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
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IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
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CREG(Xer);
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CREG(Cr);
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to->ContextFlags |= CONTEXT_INTEGER;
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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FREG(0);
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FREG(1);
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FREG(2);
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FREG(3);
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FREG(4);
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FREG(5);
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FREG(6);
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FREG(7);
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FREG(8);
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FREG(9);
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FREG(10);
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FREG(11);
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FREG(12);
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FREG(13);
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FREG(14);
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FREG(15);
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FREG(16);
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FREG(17);
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FREG(18);
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FREG(19);
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FREG(20);
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FREG(21);
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FREG(22);
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FREG(23);
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FREG(24);
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FREG(25);
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FREG(26);
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FREG(27);
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FREG(28);
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FREG(29);
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FREG(30);
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FREG(31);
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CREG(Fpscr);
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to->ContextFlags |= CONTEXT_FLOATING_POINT;
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}
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}
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/* retrieve the current instruction pointer of a context */
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void *get_context_ip( const CONTEXT *context )
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{
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return (void *)context->Iar;
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}
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/* retrieve the thread context */
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void get_thread_context( struct thread *thread, CONTEXT *context, unsigned int flags )
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{
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if (thread->context) /* thread is inside an exception event or suspended */
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{
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copy_context( context, thread->context, flags );
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}
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else if (flags && suspend_for_ptrace( thread ))
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{
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get_thread_context_ptrace( thread, flags, context );
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resume_after_ptrace( thread );
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}
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}
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/* set the thread context */
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void set_thread_context( struct thread *thread, const CONTEXT *context, unsigned int flags )
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{
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if (thread->context) /* thread is inside an exception event or suspended */
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{
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copy_context( thread->context, context, flags );
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}
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else if (flags && suspend_for_ptrace( thread ))
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{
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set_thread_context_ptrace( thread, flags, context );
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resume_after_ptrace( thread );
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}
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}
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#endif /* __powerpc__ */
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