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server: Moved read/write_process_memory and get_selector_entry to ptrace.c.
This commit is contained in:
Alexandre Julliard
parent
0b492c708f
commit
cb70931f67
131
server/process.c
131
server/process.c
@ -709,137 +709,6 @@ void enum_processes( int (*cb)(struct process*, void*), void *user )
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}
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}
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}
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}
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/* read data from a process memory space */
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static int read_process_memory( struct process *process, const void *ptr, size_t size, char *dest )
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{
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struct thread *thread = get_process_first_thread( process );
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unsigned int first_offset, last_offset, len;
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int data, *addr;
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if (!thread) /* process is dead */
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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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first_offset = (unsigned long)ptr % sizeof(int);
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last_offset = (size + first_offset) % sizeof(int);
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if (!last_offset) last_offset = sizeof(int);
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addr = (int *)((char *)ptr - first_offset);
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len = (size + first_offset + sizeof(int) - 1) / sizeof(int);
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if (suspend_for_ptrace( thread ))
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{
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if (len > 1)
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{
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if (read_thread_int( thread, addr++, &data ) == -1) goto done;
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memcpy( dest, (char *)&data + first_offset, sizeof(int) - first_offset );
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dest += sizeof(int) - first_offset;
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first_offset = 0;
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len--;
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}
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while (len > 1)
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{
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if (read_thread_int( thread, addr++, &data ) == -1) goto done;
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memcpy( dest, &data, sizeof(int) );
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dest += sizeof(int);
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len--;
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}
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if (read_thread_int( thread, addr++, &data ) == -1) goto done;
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memcpy( dest, (char *)&data + first_offset, last_offset - first_offset );
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len--;
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done:
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resume_after_ptrace( thread );
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}
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return !len;
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}
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/* make sure we can write to the whole address range */
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/* len is the total size (in ints) */
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static int check_process_write_access( struct thread *thread, int *addr, size_t len )
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{
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int page = get_page_size() / sizeof(int);
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for (;;)
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{
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if (write_thread_int( thread, addr, 0, 0 ) == -1) return 0;
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if (len <= page) break;
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addr += page;
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len -= page;
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}
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return (write_thread_int( thread, addr + len - 1, 0, 0 ) != -1);
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}
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/* write data to a process memory space */
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static int write_process_memory( struct process *process, void *ptr, size_t size, const char *src )
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{
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struct thread *thread = get_process_first_thread( process );
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int ret = 0, data = 0;
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size_t len;
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int *addr;
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unsigned int first_mask, first_offset, last_mask, last_offset;
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if (!thread) /* process is dead */
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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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/* compute the mask for the first int */
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first_mask = ~0;
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first_offset = (unsigned long)ptr % sizeof(int);
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memset( &first_mask, 0, first_offset );
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/* compute the mask for the last int */
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last_offset = (size + first_offset) % sizeof(int);
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if (!last_offset) last_offset = sizeof(int);
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last_mask = 0;
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memset( &last_mask, 0xff, last_offset );
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addr = (int *)((char *)ptr - first_offset);
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len = (size + first_offset + sizeof(int) - 1) / sizeof(int);
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if (suspend_for_ptrace( thread ))
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{
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if (!check_process_write_access( thread, addr, len ))
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{
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set_error( STATUS_ACCESS_DENIED );
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goto done;
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}
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/* first word is special */
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if (len > 1)
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{
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memcpy( (char *)&data + first_offset, src, sizeof(int) - first_offset );
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src += sizeof(int) - first_offset;
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if (write_thread_int( thread, addr++, data, first_mask ) == -1) goto done;
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first_offset = 0;
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len--;
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}
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else last_mask &= first_mask;
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while (len > 1)
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{
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memcpy( &data, src, sizeof(int) );
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src += sizeof(int);
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if (write_thread_int( thread, addr++, data, ~0 ) == -1) goto done;
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len--;
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}
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/* last word is special too */
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memcpy( (char *)&data + first_offset, src, last_offset - first_offset );
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if (write_thread_int( thread, addr, data, last_mask ) == -1) goto done;
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ret = 1;
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done:
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resume_after_ptrace( thread );
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}
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return ret;
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}
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/* set the debugged flag in the process PEB */
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/* set the debugged flag in the process PEB */
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int set_process_debug_flag( struct process *process, int flag )
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int set_process_debug_flag( struct process *process, int flag )
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{
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{
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@ -125,6 +125,8 @@ extern void detach_debugged_processes( struct thread *debugger );
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extern struct process_snapshot *process_snap( int *count );
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extern struct process_snapshot *process_snap( int *count );
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extern struct module_snapshot *module_snap( struct process *process, int *count );
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extern struct module_snapshot *module_snap( struct process *process, int *count );
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extern void enum_processes( int (*cb)(struct process*, void*), void *user);
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extern void enum_processes( int (*cb)(struct process*, void*), void *user);
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extern int read_process_memory( struct process *process, const void *ptr, size_t size, char *dest );
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extern int write_process_memory( struct process *process, void *ptr, size_t size, const char *src );
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inline static process_id_t get_process_id( struct process *process ) { return process->id; }
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inline static process_id_t get_process_id( struct process *process ) { return process->id; }
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163
server/ptrace.c
163
server/ptrace.c
@ -279,7 +279,7 @@ void resume_after_ptrace( struct thread *thread )
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}
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}
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/* read an int from a thread address space */
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/* read an int from a thread address space */
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int read_thread_int( struct thread *thread, const int *addr, int *data )
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static int read_thread_int( struct thread *thread, const int *addr, int *data )
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{
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{
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errno = 0;
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errno = 0;
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*data = ptrace( PTRACE_PEEKDATA, get_ptrace_pid(thread), (caddr_t)addr, 0 );
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*data = ptrace( PTRACE_PEEKDATA, get_ptrace_pid(thread), (caddr_t)addr, 0 );
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@ -292,7 +292,7 @@ int read_thread_int( struct thread *thread, const int *addr, int *data )
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}
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}
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/* write an int to a thread address space */
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/* write an int to a thread address space */
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int write_thread_int( struct thread *thread, int *addr, int data, unsigned int mask )
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static int write_thread_int( struct thread *thread, int *addr, int data, unsigned int mask )
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{
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{
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int res;
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int res;
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if (mask != ~0)
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if (mask != ~0)
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@ -304,3 +304,162 @@ int write_thread_int( struct thread *thread, int *addr, int data, unsigned int m
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file_set_error();
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file_set_error();
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return res;
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return res;
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}
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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, const void *ptr, size_t size, char *dest )
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{
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struct thread *thread = get_process_first_thread( process );
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unsigned int first_offset, last_offset, len;
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int data, *addr;
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if (!thread) /* process is dead */
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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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first_offset = (unsigned long)ptr % sizeof(int);
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last_offset = (size + first_offset) % sizeof(int);
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if (!last_offset) last_offset = sizeof(int);
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addr = (int *)((char *)ptr - first_offset);
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len = (size + first_offset + sizeof(int) - 1) / sizeof(int);
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if (suspend_for_ptrace( thread ))
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{
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if (len > 1)
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{
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if (read_thread_int( thread, addr++, &data ) == -1) goto done;
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memcpy( dest, (char *)&data + first_offset, sizeof(int) - first_offset );
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dest += sizeof(int) - first_offset;
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first_offset = 0;
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len--;
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}
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while (len > 1)
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{
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if (read_thread_int( thread, addr++, &data ) == -1) goto done;
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memcpy( dest, &data, sizeof(int) );
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dest += sizeof(int);
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len--;
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}
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if (read_thread_int( thread, addr++, &data ) == -1) goto done;
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memcpy( dest, (char *)&data + first_offset, last_offset - first_offset );
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len--;
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done:
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resume_after_ptrace( thread );
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}
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return !len;
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}
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/* make sure we can write to the whole address range */
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/* len is the total size (in ints) */
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static int check_process_write_access( struct thread *thread, int *addr, size_t len )
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{
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int page = get_page_size() / sizeof(int);
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for (;;)
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{
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if (write_thread_int( thread, addr, 0, 0 ) == -1) return 0;
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if (len <= page) break;
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addr += page;
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len -= page;
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}
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return (write_thread_int( thread, addr + len - 1, 0, 0 ) != -1);
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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, void *ptr, size_t size, const char *src )
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{
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struct thread *thread = get_process_first_thread( process );
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int ret = 0, data = 0;
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size_t len;
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int *addr;
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unsigned int first_mask, first_offset, last_mask, last_offset;
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if (!thread) /* process is dead */
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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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/* compute the mask for the first int */
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first_mask = ~0;
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first_offset = (unsigned long)ptr % sizeof(int);
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memset( &first_mask, 0, first_offset );
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/* compute the mask for the last int */
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last_offset = (size + first_offset) % sizeof(int);
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if (!last_offset) last_offset = sizeof(int);
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last_mask = 0;
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memset( &last_mask, 0xff, last_offset );
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addr = (int *)((char *)ptr - first_offset);
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len = (size + first_offset + sizeof(int) - 1) / sizeof(int);
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if (suspend_for_ptrace( thread ))
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{
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if (!check_process_write_access( thread, addr, len ))
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{
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set_error( STATUS_ACCESS_DENIED );
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goto done;
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}
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/* first word is special */
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if (len > 1)
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{
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memcpy( (char *)&data + first_offset, src, sizeof(int) - first_offset );
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src += sizeof(int) - first_offset;
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if (write_thread_int( thread, addr++, data, first_mask ) == -1) goto done;
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first_offset = 0;
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len--;
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}
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else last_mask &= first_mask;
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while (len > 1)
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{
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memcpy( &data, src, sizeof(int) );
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src += sizeof(int);
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if (write_thread_int( thread, addr++, data, ~0 ) == -1) goto done;
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len--;
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}
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/* last word is special too */
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memcpy( (char *)&data + first_offset, src, last_offset - first_offset );
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if (write_thread_int( thread, addr, data, last_mask ) == -1) goto done;
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ret = 1;
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done:
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resume_after_ptrace( thread );
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}
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return ret;
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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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if (!thread->process->ldt_copy)
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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 (suspend_for_ptrace( thread ))
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{
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unsigned char flags_buf[4];
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int *addr = (int *)thread->process->ldt_copy + entry;
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if (read_thread_int( thread, addr, (int *)base ) == -1) goto done;
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if (read_thread_int( thread, addr + 8192, (int *)limit ) == -1) goto done;
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addr = (int *)thread->process->ldt_copy + 2*8192 + (entry >> 2);
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if (read_thread_int( thread, addr, (int *)flags_buf ) == -1) goto done;
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*flags = flags_buf[entry & 3];
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done:
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resume_after_ptrace( thread );
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}
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}
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@ -733,35 +733,6 @@ int thread_get_inflight_fd( struct thread *thread, int client )
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return -1;
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return -1;
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}
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}
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/* retrieve an LDT selector entry */
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static void get_selector_entry( struct thread *thread, int entry,
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unsigned int *base, unsigned int *limit,
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unsigned char *flags )
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{
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if (!thread->process->ldt_copy)
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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 (suspend_for_ptrace( thread ))
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{
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unsigned char flags_buf[4];
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int *addr = (int *)thread->process->ldt_copy + entry;
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if (read_thread_int( thread, addr, (int *)base ) == -1) goto done;
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if (read_thread_int( thread, addr + 8192, (int *)limit ) == -1) goto done;
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addr = (int *)thread->process->ldt_copy + 2*8192 + (entry >> 2);
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if (read_thread_int( thread, addr, (int *)flags_buf ) == -1) goto done;
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*flags = flags_buf[entry & 3];
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done:
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resume_after_ptrace( thread );
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}
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}
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/* kill a thread on the spot */
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/* kill a thread on the spot */
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void kill_thread( struct thread *thread, int violent_death )
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void kill_thread( struct thread *thread, int violent_death )
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{
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{
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@ -126,14 +126,14 @@ extern int attach_process( struct process *process );
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|||||||
extern void detach_process( struct process *process );
|
extern void detach_process( struct process *process );
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||||||
extern int suspend_for_ptrace( struct thread *thread );
|
extern int suspend_for_ptrace( struct thread *thread );
|
||||||
extern void resume_after_ptrace( struct thread *thread );
|
extern void resume_after_ptrace( struct thread *thread );
|
||||||
extern int read_thread_int( struct thread *thread, const int *addr, int *data );
|
|
||||||
extern int write_thread_int( struct thread *thread, int *addr, int data, unsigned int mask );
|
|
||||||
extern void *get_thread_ip( struct thread *thread );
|
extern void *get_thread_ip( struct thread *thread );
|
||||||
extern int get_thread_single_step( struct thread *thread );
|
extern int get_thread_single_step( struct thread *thread );
|
||||||
extern void get_thread_context( struct thread *thread, CONTEXT *context, unsigned int flags );
|
extern void get_thread_context( struct thread *thread, CONTEXT *context, unsigned int flags );
|
||||||
extern void set_thread_context( struct thread *thread, const CONTEXT *context, unsigned int flags );
|
extern void set_thread_context( struct thread *thread, const CONTEXT *context, unsigned int flags );
|
||||||
extern int tkill( int tgid, int pid, int sig );
|
extern int tkill( int tgid, int pid, int sig );
|
||||||
extern int send_thread_signal( struct thread *thread, int sig );
|
extern int send_thread_signal( struct thread *thread, int sig );
|
||||||
|
extern void get_selector_entry( struct thread *thread, int entry, unsigned int *base,
|
||||||
|
unsigned int *limit, unsigned char *flags );
|
||||||
|
|
||||||
extern unsigned int global_error; /* global error code for when no thread is current */
|
extern unsigned int global_error; /* global error code for when no thread is current */
|
||||||
|
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user