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https://github.com/reactos/wine.git
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462 lines
15 KiB
C
462 lines
15 KiB
C
/*
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* Server-side debugger support using Mach primitives
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*
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* Copyright (C) 1999, 2006 Alexandre Julliard
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* Copyright (C) 2006 Ken Thomases for CodeWeavers
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "winternl.h"
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#include "file.h"
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#include "process.h"
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#include "thread.h"
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#include "request.h"
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#include "wine/library.h"
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#ifdef USE_MACH
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#include <mach/mach.h>
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#include <mach/mach_error.h>
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#include <mach/thread_act.h>
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#include <servers/bootstrap.h>
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#if defined(__APPLE__) && defined(__i386__)
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extern int pthread_kill_syscall( mach_port_t, int );
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__ASM_GLOBAL_FUNC( pthread_kill_syscall,
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"movl $328,%eax\n\t" /* SYS___pthread_kill */
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"int $0x80\n\t"
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"jae 1f\n\t"
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"negl %eax\n"
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"1:\tret" )
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#else
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static inline int pthread_kill_syscall( mach_port_t, int )
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{
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return -ENOSYS;
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}
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#endif
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static mach_port_t server_mach_port;
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void sigchld_callback(void)
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{
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assert(0); /* should never be called on MacOS */
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}
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static void mach_set_error(kern_return_t mach_error)
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{
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switch (mach_error)
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{
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case KERN_SUCCESS: break;
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case KERN_INVALID_ARGUMENT: set_error(STATUS_INVALID_PARAMETER); break;
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case KERN_NO_SPACE: set_error(STATUS_NO_MEMORY); break;
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case KERN_PROTECTION_FAILURE: set_error(STATUS_ACCESS_DENIED); break;
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case KERN_INVALID_ADDRESS: set_error(STATUS_ACCESS_VIOLATION); break;
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default: set_error(STATUS_UNSUCCESSFUL); break;
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}
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}
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static mach_port_t get_process_port( struct process *process )
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{
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return process->trace_data;
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}
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/* initialize the process control mechanism */
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void init_tracing_mechanism(void)
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{
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mach_port_t bp;
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if (task_get_bootstrap_port(mach_task_self(), &bp) != KERN_SUCCESS)
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fatal_error("Can't find bootstrap port\n");
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if (mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &server_mach_port) != KERN_SUCCESS)
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fatal_error("Can't allocate port\n");
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if (mach_port_insert_right( mach_task_self(),
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server_mach_port,
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server_mach_port,
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MACH_MSG_TYPE_MAKE_SEND ) != KERN_SUCCESS)
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fatal_error("Error inserting rights\n");
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if (bootstrap_register(bp, (char*)wine_get_server_dir(), server_mach_port) != KERN_SUCCESS)
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fatal_error("Can't check in server_mach_port\n");
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mach_port_deallocate(mach_task_self(), bp);
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}
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/* initialize the per-process tracing mechanism */
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void init_process_tracing( struct process *process )
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{
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int pid, ret;
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struct
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{
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mach_msg_header_t header;
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mach_msg_body_t body;
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mach_msg_port_descriptor_t task_port;
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mach_msg_trailer_t trailer; /* only present on receive */
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} msg;
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for (;;)
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{
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ret = mach_msg( &msg.header, MACH_RCV_MSG|MACH_RCV_TIMEOUT, 0, sizeof(msg),
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server_mach_port, 0, 0 );
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if (ret)
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{
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if (ret != MACH_RCV_TIMED_OUT && debug_level)
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fprintf( stderr, "warning: mach port receive failed with %x\n", ret );
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return;
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}
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/* if anything in the message is invalid, ignore it */
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if (msg.header.msgh_size != offsetof(typeof(msg), trailer)) continue;
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if (msg.body.msgh_descriptor_count != 1) continue;
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if (msg.task_port.type != MACH_MSG_PORT_DESCRIPTOR) continue;
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if (msg.task_port.disposition != MACH_MSG_TYPE_PORT_SEND) continue;
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if (msg.task_port.name == MACH_PORT_NULL) continue;
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if (msg.task_port.name == MACH_PORT_DEAD) continue;
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if (!pid_for_task( msg.task_port.name, &pid ))
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{
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struct thread *thread = get_thread_from_pid( pid );
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if (thread && !thread->process->trace_data)
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thread->process->trace_data = msg.task_port.name;
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else
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mach_port_deallocate( mach_task_self(), msg.task_port.name );
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}
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}
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}
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/* terminate the per-process tracing mechanism */
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void finish_process_tracing( struct process *process )
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{
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if (process->trace_data)
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{
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mach_port_deallocate( mach_task_self(), process->trace_data );
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process->trace_data = 0;
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}
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}
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/* retrieve the thread x86 registers */
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void get_thread_context( struct thread *thread, context_t *context, unsigned int flags )
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{
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#ifdef __i386__
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x86_debug_state32_t state;
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mach_msg_type_number_t count = sizeof(state) / sizeof(int);
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mach_msg_type_name_t type;
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mach_port_t port, process_port = get_process_port( thread->process );
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/* all other regs are handled on the client side */
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assert( flags == SERVER_CTX_DEBUG_REGISTERS );
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if (thread->unix_pid == -1 || !process_port ||
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mach_port_extract_right( process_port, thread->unix_tid,
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MACH_MSG_TYPE_COPY_SEND, &port, &type ))
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{
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set_error( STATUS_ACCESS_DENIED );
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return;
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}
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if (!thread_get_state( port, x86_DEBUG_STATE32, (thread_state_t)&state, &count ))
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{
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/* work around silly renaming of struct members in OS X 10.5 */
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#if __DARWIN_UNIX03 && defined(_STRUCT_X86_DEBUG_STATE32)
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context->debug.i386_regs.dr0 = state.__dr0;
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context->debug.i386_regs.dr1 = state.__dr1;
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context->debug.i386_regs.dr2 = state.__dr2;
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context->debug.i386_regs.dr3 = state.__dr3;
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context->debug.i386_regs.dr6 = state.__dr6;
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context->debug.i386_regs.dr7 = state.__dr7;
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#else
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context->debug.i386_regs.dr0 = state.dr0;
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context->debug.i386_regs.dr1 = state.dr1;
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context->debug.i386_regs.dr2 = state.dr2;
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context->debug.i386_regs.dr3 = state.dr3;
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context->debug.i386_regs.dr6 = state.dr6;
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context->debug.i386_regs.dr7 = state.dr7;
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#endif
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context->flags |= SERVER_CTX_DEBUG_REGISTERS;
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}
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mach_port_deallocate( mach_task_self(), port );
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#endif
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}
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/* set the thread x86 registers */
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void set_thread_context( struct thread *thread, const context_t *context, unsigned int flags )
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{
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#ifdef __i386__
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x86_debug_state32_t state;
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mach_msg_type_number_t count = sizeof(state) / sizeof(int);
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mach_msg_type_name_t type;
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mach_port_t port, process_port = get_process_port( thread->process );
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/* all other regs are handled on the client side */
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assert( flags == SERVER_CTX_DEBUG_REGISTERS );
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if (thread->unix_pid == -1 || !process_port ||
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mach_port_extract_right( process_port, thread->unix_tid,
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MACH_MSG_TYPE_COPY_SEND, &port, &type ))
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{
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set_error( STATUS_ACCESS_DENIED );
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return;
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}
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#if __DARWIN_UNIX03 && defined(_STRUCT_X86_DEBUG_STATE32)
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state.__dr0 = context->debug.i386_regs.dr0;
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state.__dr1 = context->debug.i386_regs.dr1;
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state.__dr2 = context->debug.i386_regs.dr2;
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state.__dr3 = context->debug.i386_regs.dr3;
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state.__dr4 = 0;
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state.__dr5 = 0;
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state.__dr6 = context->debug.i386_regs.dr6;
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state.__dr7 = context->debug.i386_regs.dr7;
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#else
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state.dr0 = context->debug.i386_regs.dr0;
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state.dr1 = context->debug.i386_regs.dr1;
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state.dr2 = context->debug.i386_regs.dr2;
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state.dr3 = context->debug.i386_regs.dr3;
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state.dr4 = 0;
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state.dr5 = 0;
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state.dr6 = context->debug.i386_regs.dr6;
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state.dr7 = context->debug.i386_regs.dr7;
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#endif
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if (!thread_set_state( port, x86_DEBUG_STATE32, (thread_state_t)&state, count ))
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{
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if (thread->context) /* update the cached values */
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thread->context->debug.i386_regs = context->debug.i386_regs;
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}
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mach_port_deallocate( mach_task_self(), port );
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#endif
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}
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int send_thread_signal( struct thread *thread, int sig )
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{
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int ret = -1;
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mach_port_t process_port = get_process_port( thread->process );
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if (thread->unix_pid != -1 && process_port)
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{
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mach_msg_type_name_t type;
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mach_port_t port;
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if (!mach_port_extract_right( process_port, thread->unix_tid,
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MACH_MSG_TYPE_COPY_SEND, &port, &type ))
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{
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if ((ret = pthread_kill_syscall( port, sig )) < 0)
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{
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errno = -ret;
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ret = -1;
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}
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mach_port_deallocate( mach_task_self(), port );
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}
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else errno = ESRCH;
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if (ret == -1 && errno == ESRCH) /* thread got killed */
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{
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thread->unix_pid = -1;
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thread->unix_tid = -1;
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}
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}
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if (debug_level && ret != -1)
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fprintf( stderr, "%04x: *sent signal* signal=%d\n", thread->id, sig );
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return (ret != -1);
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}
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/* read data from a process memory space */
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int read_process_memory( struct process *process, client_ptr_t ptr, data_size_t size, char *dest )
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{
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kern_return_t ret;
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mach_msg_type_number_t bytes_read;
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vm_offset_t offset, data;
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vm_address_t aligned_address;
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vm_size_t aligned_size;
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unsigned int page_size = get_page_size();
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mach_port_t process_port = get_process_port( process );
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if (!process_port)
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{
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set_error( STATUS_ACCESS_DENIED );
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return 0;
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}
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if ((vm_address_t)ptr != ptr)
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{
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set_error( STATUS_ACCESS_DENIED );
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return 0;
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}
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if ((ret = task_suspend( process_port )) != KERN_SUCCESS)
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{
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mach_set_error( ret );
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return 0;
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}
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offset = ptr % page_size;
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aligned_address = (vm_address_t)(ptr - offset);
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aligned_size = (size + offset + page_size - 1) / page_size * page_size;
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ret = vm_read( process_port, aligned_address, aligned_size, &data, &bytes_read );
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if (ret != KERN_SUCCESS) mach_set_error( ret );
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else
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{
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memcpy( dest, (char *)data + offset, size );
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vm_deallocate( mach_task_self(), data, bytes_read );
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}
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task_resume( process_port );
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return (ret == KERN_SUCCESS);
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}
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/* write data to a process memory space */
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int write_process_memory( struct process *process, client_ptr_t ptr, data_size_t size, const char *src )
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{
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kern_return_t ret;
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vm_address_t aligned_address, region_address;
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vm_size_t aligned_size, region_size;
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mach_msg_type_number_t info_size, bytes_read;
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vm_offset_t offset, task_mem = 0;
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struct vm_region_basic_info info;
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mach_port_t dummy;
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unsigned int page_size = get_page_size();
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mach_port_t process_port = get_process_port( process );
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if (!process_port)
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{
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set_error( STATUS_ACCESS_DENIED );
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return 0;
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}
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if ((vm_address_t)ptr != ptr)
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{
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set_error( STATUS_ACCESS_DENIED );
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return 0;
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}
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offset = ptr % page_size;
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aligned_address = (vm_address_t)(ptr - offset);
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aligned_size = (size + offset + page_size - 1) / page_size * page_size;
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if ((ret = task_suspend( process_port )) != KERN_SUCCESS)
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{
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mach_set_error( ret );
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return 0;
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}
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ret = vm_read( process_port, aligned_address, aligned_size, &task_mem, &bytes_read );
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if (ret != KERN_SUCCESS)
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{
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mach_set_error( ret );
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goto failed;
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}
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region_address = aligned_address;
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info_size = sizeof(info);
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ret = vm_region( process_port, ®ion_address, ®ion_size, VM_REGION_BASIC_INFO,
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(vm_region_info_t)&info, &info_size, &dummy );
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if (ret != KERN_SUCCESS)
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{
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mach_set_error( ret );
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goto failed;
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}
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if (region_address > aligned_address ||
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region_address + region_size < aligned_address + aligned_size)
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{
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/* FIXME: should support multiple regions */
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set_error( ERROR_ACCESS_DENIED );
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goto failed;
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}
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ret = vm_protect( process_port, aligned_address, aligned_size, 0, VM_PROT_READ | VM_PROT_WRITE );
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if (ret != KERN_SUCCESS)
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{
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mach_set_error( ret );
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goto failed;
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}
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/* FIXME: there's an optimization that can be made: check first and last */
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/* pages for writability; read first and last pages; write interior */
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/* pages to task without ever reading&modifying them; if that succeeds, */
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/* modify first and last pages and write them. */
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memcpy( (char*)task_mem + offset, src, size );
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ret = vm_write( process_port, aligned_address, task_mem, bytes_read );
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if (ret != KERN_SUCCESS) mach_set_error( ret );
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else
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{
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vm_deallocate( mach_task_self(), task_mem, bytes_read );
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/* restore protection */
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vm_protect( process_port, aligned_address, aligned_size, 0, info.protection );
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task_resume( process_port );
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return 1;
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}
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failed:
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if (task_mem) vm_deallocate( mach_task_self(), task_mem, bytes_read );
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task_resume( process_port );
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return 0;
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}
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/* retrieve an LDT selector entry */
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void get_selector_entry( struct thread *thread, int entry, unsigned int *base,
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unsigned int *limit, unsigned char *flags )
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{
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const unsigned int total_size = (2 * sizeof(int) + 1) * 8192;
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struct process *process = thread->process;
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unsigned int page_size = get_page_size();
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vm_offset_t data;
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kern_return_t ret;
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mach_msg_type_number_t bytes_read;
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mach_port_t process_port = get_process_port( thread->process );
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if (!process->ldt_copy || !process_port)
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{
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set_error( STATUS_ACCESS_DENIED );
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return;
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}
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if (entry >= 8192)
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{
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set_error( STATUS_INVALID_PARAMETER ); /* FIXME */
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return;
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}
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if ((ret = task_suspend( process_port )) == KERN_SUCCESS)
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{
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vm_offset_t offset = process->ldt_copy % page_size;
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vm_address_t aligned_address = (vm_address_t)(process->ldt_copy - offset);
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vm_size_t aligned_size = (total_size + offset + page_size - 1) / page_size * page_size;
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ret = vm_read( process_port, aligned_address, aligned_size, &data, &bytes_read );
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if (ret != KERN_SUCCESS) mach_set_error( ret );
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else
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{
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const int *ldt = (const int *)((char *)data + offset);
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memcpy( base, ldt + entry, sizeof(int) );
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memcpy( limit, ldt + entry + 8192, sizeof(int) );
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memcpy( flags, (char *)(ldt + 2 * 8192) + entry, 1 );
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vm_deallocate( mach_task_self(), data, bytes_read );
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}
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task_resume( process_port );
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}
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else mach_set_error( ret );
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}
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#endif /* USE_MACH */
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