237 lines
6.2 KiB
C
237 lines
6.2 KiB
C
/*
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* Sparc register context support
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*
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* Copyright (C) 2000 Ulrich Weigand
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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 __sparc__
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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 <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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#include "winbase.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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#if defined(__sun) || defined(__sun__)
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/* retrieve a thread context */
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static void get_thread_context( 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_FULL)
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{
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struct regs regs;
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if (ptrace( PTRACE_GETREGS, pid, 0, (int) ®s ) == -1) goto error;
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if (flags & CONTEXT_INTEGER)
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{
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context->g0 = 0;
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context->g1 = regs.r_g1;
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context->g2 = regs.r_g2;
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context->g3 = regs.r_g3;
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context->g4 = regs.r_g4;
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context->g5 = regs.r_g5;
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context->g6 = regs.r_g6;
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context->g7 = regs.r_g7;
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context->o0 = regs.r_o0;
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context->o1 = regs.r_o1;
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context->o2 = regs.r_o2;
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context->o3 = regs.r_o3;
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context->o4 = regs.r_o4;
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context->o5 = regs.r_o5;
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context->o6 = regs.r_o6;
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context->o7 = regs.r_o7;
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/* FIXME: local and in registers */
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}
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if (flags & CONTEXT_CONTROL)
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{
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context->psr = regs.r_psr;
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context->pc = regs.r_pc;
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context->npc = regs.r_npc;
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context->y = regs.r_y;
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context->wim = 0; /* FIXME */
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context->tbr = 0; /* FIXME */
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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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/* FIXME */
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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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/* set a thread context */
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static void set_thread_context( struct thread *thread, unsigned int flags, const CONTEXT *context )
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{
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/* FIXME */
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}
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#else /* __sun__ */
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#error You must implement get/set_thread_context for your platform
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#endif /* __sun__ */
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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, int flags )
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{
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if (flags & CONTEXT_CONTROL)
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{
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to->psr = from->psr;
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to->pc = from->pc;
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to->npc = from->npc;
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to->y = from->y;
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to->wim = from->wim;
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to->tbr = from->tbr;
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}
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if (flags & CONTEXT_INTEGER)
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{
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to->g0 = from->g0;
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to->g1 = from->g1;
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to->g2 = from->g2;
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to->g3 = from->g3;
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to->g4 = from->g4;
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to->g5 = from->g5;
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to->g6 = from->g6;
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to->g7 = from->g7;
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to->o0 = from->o0;
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to->o1 = from->o1;
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to->o2 = from->o2;
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to->o3 = from->o3;
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to->o4 = from->o4;
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to->o5 = from->o5;
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to->o6 = from->o6;
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to->o7 = from->o7;
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to->l0 = from->l0;
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to->l1 = from->l1;
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to->l2 = from->l2;
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to->l3 = from->l3;
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to->l4 = from->l4;
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to->l5 = from->l5;
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to->l6 = from->l6;
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to->l7 = from->l7;
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to->i0 = from->i0;
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to->i1 = from->i1;
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to->i2 = from->i2;
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to->i3 = from->i3;
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to->i4 = from->i4;
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to->i5 = from->i5;
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to->i6 = from->i6;
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to->i7 = from->i7;
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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/* FIXME */
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}
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}
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/* retrieve the current instruction pointer of a thread */
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void *get_thread_ip( struct thread *thread )
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{
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CONTEXT context;
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context.pc = 0;
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if (suspend_for_ptrace( thread ))
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{
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get_thread_context( thread, CONTEXT_CONTROL, &context );
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resume_after_ptrace( thread );
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}
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return (void *)context.pc;
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}
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/* determine if we should continue the thread in single-step mode */
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int get_thread_single_step( struct thread *thread )
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{
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return 0; /* FIXME */
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}
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/* retrieve the current context of a thread */
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DECL_HANDLER(get_thread_context)
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{
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struct thread *thread;
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void *data;
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int flags = req->flags & ~CONTEXT_SPARC; /* get rid of CPU id */
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if (get_reply_max_size() < sizeof(CONTEXT))
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{
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set_error( STATUS_INVALID_PARAMETER );
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return;
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}
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if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;
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if ((data = set_reply_data_size( sizeof(CONTEXT) )))
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{
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if (thread->context) /* thread is inside an exception event */
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{
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copy_context( data, thread->context, flags );
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flags = 0;
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}
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if (flags && suspend_for_ptrace( thread ))
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{
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get_thread_context( thread, flags, data );
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resume_after_ptrace( thread );
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}
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}
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release_object( thread );
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}
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/* set the current context of a thread */
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DECL_HANDLER(set_thread_context)
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{
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struct thread *thread;
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int flags = req->flags & ~CONTEXT_SPARC; /* get rid of CPU id */
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if (get_req_data_size() < sizeof(CONTEXT))
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{
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set_error( STATUS_INVALID_PARAMETER );
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return;
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}
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if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
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{
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if (thread->context) /* thread is inside an exception event */
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{
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copy_context( thread->context, get_req_data(), flags );
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flags = 0;
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}
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if (flags && suspend_for_ptrace( thread ))
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{
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set_thread_context( thread, flags, get_req_data() );
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resume_after_ptrace( thread );
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}
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release_object( thread );
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}
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}
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#endif /* __sparc__ */
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