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