/* set the thread x86 registers */
void set_thread_context( struct thread *thread, const context_t *context, unsigned int flags )
{
int pid = get_ptrace_tid(thread);
struct dbreg dbregs;
/* all other regs are handled on the client side */
assert( flags == SERVER_CTX_DEBUG_REGISTERS );
if (!suspend_for_ptrace( thread )) return;
#ifdef DBREG_DRX
/* needed for FreeBSD, the structure fields have changed under 5.x */
DBREG_DRX((&dbregs), 0) = context->debug.i386_regs.dr0;
DBREG_DRX((&dbregs), 1) = context->debug.i386_regs.dr1;
DBREG_DRX((&dbregs), 2) = context->debug.i386_regs.dr2;
DBREG_DRX((&dbregs), 3) = context->debug.i386_regs.dr3;
DBREG_DRX((&dbregs), 4) = 0;
DBREG_DRX((&dbregs), 5) = 0;
DBREG_DRX((&dbregs), 6) = context->debug.i386_regs.dr6;
DBREG_DRX((&dbregs), 7) = context->debug.i386_regs.dr7;
#else
dbregs.dr0 = context->debug.i386_regs.dr0;
dbregs.dr1 = context->debug.i386_regs.dr1;
dbregs.dr2 = context->debug.i386_regs.dr2;
dbregs.dr3 = context->debug.i386_regs.dr3;
dbregs.dr4 = 0;
dbregs.dr5 = 0;
dbregs.dr6 = context->debug.i386_regs.dr6;
dbregs.dr7 = context->debug.i386_regs.dr7;
#endif
if (ptrace( PTRACE_SETDBREGS, pid, (caddr_t) &dbregs, 0 ) == -1) file_set_error();
else if (thread->context)
thread->context->debug.i386_regs = context->debug.i386_regs; /* update the cached values */
resume_after_ptrace( thread );
}
/* retrieve the thread x86 registers */
void get_thread_context( struct thread *thread, context_t *context, unsigned int flags )
{
int pid = get_ptrace_tid(thread);
struct dbreg dbregs;
/* all other regs are handled on the client side */
assert( flags == SERVER_CTX_DEBUG_REGISTERS );
if (!suspend_for_ptrace( thread )) return;
if (ptrace( PTRACE_GETDBREGS, pid, (caddr_t) &dbregs, 0 ) == -1) file_set_error();
else
{
#ifdef DBREG_DRX
/* needed for FreeBSD, the structure fields have changed under 5.x */
context->debug.i386_regs.dr0 = DBREG_DRX((&dbregs), 0);
context->debug.i386_regs.dr1 = DBREG_DRX((&dbregs), 1);
context->debug.i386_regs.dr2 = DBREG_DRX((&dbregs), 2);
context->debug.i386_regs.dr3 = DBREG_DRX((&dbregs), 3);
context->debug.i386_regs.dr6 = DBREG_DRX((&dbregs), 6);
context->debug.i386_regs.dr7 = DBREG_DRX((&dbregs), 7);
#else
context->debug.i386_regs.dr0 = dbregs.dr0;
context->debug.i386_regs.dr1 = dbregs.dr1;
context->debug.i386_regs.dr2 = dbregs.dr2;
context->debug.i386_regs.dr3 = dbregs.dr3;
context->debug.i386_regs.dr6 = dbregs.dr6;
context->debug.i386_regs.dr7 = dbregs.dr7;
#endif
context->flags |= SERVER_CTX_DEBUG_REGISTERS;
}
resume_after_ptrace( thread );
}
/* if the function fails the fd is closed */
struct file *create_file_for_fd( int fd, unsigned int access, unsigned int sharing )
{
struct file *file;
struct stat st;
if (fstat( fd, &st ) == -1)
{
file_set_error();
close( fd );
return NULL;
}
if (!(file = alloc_object( &file_ops )))
{
close( fd );
return NULL;
}
file->mode = st.st_mode;
file->access = default_fd_map_access( &file->obj, access );
if (!(file->fd = create_anonymous_fd( &file_fd_ops, fd, &file->obj,
FILE_SYNCHRONOUS_IO_NONALERT )))
{
release_object( file );
return NULL;
}
allow_fd_caching( file->fd );
return file;
}
static int file_flush( struct fd *fd, struct async *async )
{
int unix_fd = get_unix_fd( fd );
if (unix_fd != -1 && fsync( unix_fd ) == -1)
{
file_set_error();
return 0;
}
return 1;
}
/* read a long from a thread address space */
static long read_thread_long( struct thread *thread, long *addr, long *data )
{
errno = 0;
*data = ptrace( PTRACE_PEEKDATA, get_ptrace_pid(thread), (caddr_t)addr, 0 );
if ( *data == -1 && errno)
{
file_set_error();
return -1;
}
return 0;
}
/* set the thread x86 registers */
void set_thread_context( struct thread *thread, const context_t *context, unsigned int flags )
{
int pid = get_ptrace_tid( thread );
/* all other regs are handled on the client side */
assert( flags == SERVER_CTX_DEBUG_REGISTERS );
if (!suspend_for_ptrace( thread )) return;
switch (context->cpu)
{
case CPU_x86:
/* Linux 2.6.33+ does DR0-DR3 alignment validation, so it has to know LEN bits first */
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.i386_regs.dr7 & 0xffff0000 ) == -1) goto error;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(0), context->debug.i386_regs.dr0 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr0 = context->debug.i386_regs.dr0;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(1), context->debug.i386_regs.dr1 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr1 = context->debug.i386_regs.dr1;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(2), context->debug.i386_regs.dr2 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr2 = context->debug.i386_regs.dr2;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(3), context->debug.i386_regs.dr3 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr3 = context->debug.i386_regs.dr3;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(6), context->debug.i386_regs.dr6 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr6 = context->debug.i386_regs.dr6;
/* Linux 2.6.33+ needs enable bits set briefly to update value returned by PEEKUSER later */
ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.i386_regs.dr7 | 0x55 );
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.i386_regs.dr7 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr7 = context->debug.i386_regs.dr7;
break;
case CPU_x86_64:
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.x86_64_regs.dr7 & 0xffff0000 ) == -1) goto error;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(0), context->debug.x86_64_regs.dr0 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr0 = context->debug.x86_64_regs.dr0;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(1), context->debug.x86_64_regs.dr1 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr1 = context->debug.x86_64_regs.dr1;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(2), context->debug.x86_64_regs.dr2 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr2 = context->debug.x86_64_regs.dr2;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(3), context->debug.x86_64_regs.dr3 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr3 = context->debug.x86_64_regs.dr3;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(6), context->debug.x86_64_regs.dr6 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr6 = context->debug.x86_64_regs.dr6;
ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.x86_64_regs.dr7 | 0x55 );
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.x86_64_regs.dr7 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr7 = context->debug.x86_64_regs.dr7;
break;
default:
set_error( STATUS_INVALID_PARAMETER );
}
resume_after_ptrace( thread );
return;
error:
file_set_error();
resume_after_ptrace( thread );
}
static int file_flush( struct fd *fd, struct event **event )
{
int ret = 0, unix_fd = get_unix_fd( fd );
if (unix_fd != -1)
{
ret = (fsync( unix_fd ) != -1);
if (!ret) file_set_error();
}
return ret;
}
/* write a long to a thread address space */
static long write_thread_long( struct thread *thread, long *addr, long data, unsigned long mask )
{
long res;
if (mask != ~0ul)
{
if (read_thread_long( thread, addr, &res ) == -1) return -1;
data = (data & mask) | (res & ~mask);
}
if ((res = ptrace( PTRACE_POKEDATA, get_ptrace_pid(thread), (caddr_t)addr, data )) == -1)
file_set_error();
return res;
}
static int file_set_sd( struct object *obj, const struct security_descriptor *sd,
unsigned int set_info )
{
struct file *file = (struct file *)obj;
const SID *owner;
struct stat st;
mode_t mode;
int unix_fd;
assert( obj->ops == &file_ops );
unix_fd = get_file_unix_fd( file );
if (unix_fd == -1 || fstat( unix_fd, &st ) == -1) return 1;
if (set_info & OWNER_SECURITY_INFORMATION)
{
owner = sd_get_owner( sd );
if (!owner)
{
set_error( STATUS_INVALID_SECURITY_DESCR );
return 0;
}
if (!obj->sd || !security_equal_sid( owner, sd_get_owner( obj->sd ) ))
{
/* FIXME: get Unix uid and call fchown */
}
}
else if (obj->sd)
owner = sd_get_owner( obj->sd );
else
owner = token_get_user( current->process->token );
/* group and sacl not supported */
if (set_info & DACL_SECURITY_INFORMATION)
{
/* keep the bits that we don't map to access rights in the ACL */
mode = st.st_mode & (S_ISUID|S_ISGID|S_ISVTX);
mode |= sd_to_mode( sd, owner );
if (((st.st_mode ^ mode) & (S_IRWXU|S_IRWXG|S_IRWXO)) && fchmod( unix_fd, mode ) == -1)
{
file_set_error();
return 0;
}
}
return 1;
}
/* try to grow the file to the specified size */
int grow_file( struct file *file, file_pos_t size )
{
struct stat st;
int unix_fd = get_file_unix_fd( file );
if (unix_fd == -1) return 0;
if (fstat( unix_fd, &st ) == -1)
{
file_set_error();
return 0;
}
if (st.st_size >= size) return 1; /* already large enough */
return extend_file( file, size );
}
/* create a temp file for anonymous mappings */
struct file *create_temp_file( int access )
{
char tmpfn[16];
int fd;
sprintf( tmpfn, "anonmap.XXXXXX" ); /* create it in the server directory */
fd = mkstemps( tmpfn, 0 );
if (fd == -1)
{
file_set_error();
return NULL;
}
unlink( tmpfn );
return create_file_for_fd( fd, access, 0 );
}
/* set the thread x86 registers */
void set_thread_context( struct thread *thread, const context_t *context, unsigned int flags )
{
int pid = get_ptrace_tid( thread );
/* all other regs are handled on the client side */
assert( flags == SERVER_CTX_DEBUG_REGISTERS );
if (!suspend_for_ptrace( thread )) return;
switch (context->cpu)
{
case CPU_x86:
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(0), context->debug.i386_regs.dr0 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr0 = context->debug.i386_regs.dr0;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(1), context->debug.i386_regs.dr1 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr1 = context->debug.i386_regs.dr1;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(2), context->debug.i386_regs.dr2 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr2 = context->debug.i386_regs.dr2;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(3), context->debug.i386_regs.dr3 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr3 = context->debug.i386_regs.dr3;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(6), context->debug.i386_regs.dr6 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr6 = context->debug.i386_regs.dr6;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.i386_regs.dr7 ) == -1) goto error;
if (thread->context) thread->context->debug.i386_regs.dr7 = context->debug.i386_regs.dr7;
break;
case CPU_x86_64:
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(0), context->debug.x86_64_regs.dr0 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr0 = context->debug.x86_64_regs.dr0;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(1), context->debug.x86_64_regs.dr1 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr1 = context->debug.x86_64_regs.dr1;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(2), context->debug.x86_64_regs.dr2 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr2 = context->debug.x86_64_regs.dr2;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(3), context->debug.x86_64_regs.dr3 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr3 = context->debug.x86_64_regs.dr3;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(6), context->debug.x86_64_regs.dr6 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr6 = context->debug.x86_64_regs.dr6;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.x86_64_regs.dr7 ) == -1) goto error;
if (thread->context) thread->context->debug.x86_64_regs.dr7 = context->debug.x86_64_regs.dr7;
break;
default:
set_error( STATUS_INVALID_PARAMETER );
}
resume_after_ptrace( thread );
return;
error:
file_set_error();
resume_after_ptrace( thread );
}
/* retrieve the thread x86 registers */
void get_thread_context( struct thread *thread, context_t *context, unsigned int flags )
{
int i, pid = get_ptrace_tid(thread);
long data[8];
/* all other regs are handled on the client side */
assert( flags == SERVER_CTX_DEBUG_REGISTERS );
if (!suspend_for_ptrace( thread )) return;
for (i = 0; i < 8; i++)
{
if (i == 4 || i == 5) continue;
errno = 0;
data[i] = ptrace( PTRACE_PEEKUSER, pid, DR_OFFSET(i), 0 );
if ((data[i] == -1) && errno)
{
file_set_error();
goto done;
}
}
switch (context->cpu)
{
case CPU_x86:
context->debug.i386_regs.dr0 = data[0];
context->debug.i386_regs.dr1 = data[1];
context->debug.i386_regs.dr2 = data[2];
context->debug.i386_regs.dr3 = data[3];
context->debug.i386_regs.dr6 = data[6];
context->debug.i386_regs.dr7 = data[7];
break;
case CPU_x86_64:
context->debug.x86_64_regs.dr0 = data[0];
context->debug.x86_64_regs.dr1 = data[1];
context->debug.x86_64_regs.dr2 = data[2];
context->debug.x86_64_regs.dr3 = data[3];
context->debug.x86_64_regs.dr6 = data[6];
context->debug.x86_64_regs.dr7 = data[7];
break;
default:
set_error( STATUS_INVALID_PARAMETER );
goto done;
}
context->flags |= SERVER_CTX_DEBUG_REGISTERS;
done:
resume_after_ptrace( thread );
}
/* create a temp file for anonymous mappings */
static int create_temp_file( file_pos_t size )
{
char tmpfn[16];
int fd;
sprintf( tmpfn, "anonmap.XXXXXX" ); /* create it in the server directory */
fd = mkstemps( tmpfn, 0 );
if (fd != -1)
{
if (!grow_file( fd, size ))
{
close( fd );
fd = -1;
}
unlink( tmpfn );
}
else file_set_error();
return fd;
}
/* extend a file beyond the current end of file */
static int grow_file( int unix_fd, file_pos_t new_size )
{
static const char zero;
off_t size = new_size;
if (sizeof(new_size) > sizeof(size) && size != new_size)
{
set_error( STATUS_INVALID_PARAMETER );
return 0;
}
/* extend the file one byte beyond the requested size and then truncate it */
/* this should work around ftruncate implementations that can't extend files */
if (pwrite( unix_fd, &zero, 1, size ) != -1)
{
ftruncate( unix_fd, size );
return 1;
}
file_set_error();
return 0;
}
/* create a temp file for anonymous mappings */
static int create_temp_file( file_pos_t size )
{
static int temp_dir_fd = -1;
char tmpfn[] = "anonmap.XXXXXX";
int fd;
if (temp_dir_fd == -1)
{
temp_dir_fd = server_dir_fd;
if (!check_current_dir_for_exec())
{
/* the server dir is noexec, try the config dir instead */
fchdir( config_dir_fd );
if (check_current_dir_for_exec())
temp_dir_fd = config_dir_fd;
else /* neither works, fall back to server dir */
fchdir( server_dir_fd );
}
}
else if (temp_dir_fd != server_dir_fd) fchdir( temp_dir_fd );
fd = mkstemps( tmpfn, 0 );
if (fd != -1)
{
if (!grow_file( fd, size ))
{
close( fd );
fd = -1;
}
unlink( tmpfn );
}
else file_set_error();
if (temp_dir_fd != server_dir_fd) fchdir( server_dir_fd );
return fd;
}
/* create a file by duplicating an fd object */
struct file *create_file_for_fd_obj( struct fd *fd, unsigned int access, unsigned int sharing )
{
struct file *file;
struct stat st;
if (fstat( get_unix_fd(fd), &st ) == -1)
{
file_set_error();
return NULL;
}
if ((file = alloc_object( &file_ops )))
{
file->mode = st.st_mode;
file->access = default_fd_map_access( &file->obj, access );
if (!(file->fd = dup_fd_object( fd, access, sharing, FILE_SYNCHRONOUS_IO_NONALERT )))
{
release_object( file );
return NULL;
}
set_fd_user( file->fd, &file_fd_ops, &file->obj );
}
return file;
}
int set_file_sd( struct object *obj, struct fd *fd, const struct security_descriptor *sd,
unsigned int set_info )
{
struct security_descriptor *tmp_sd = NULL;
int unix_fd = get_unix_fd( fd );
const SID *owner, *group;
struct stat st;
mode_t mode;
int ret = 1;
if (unix_fd == -1 || fstat( unix_fd, &st ) == -1) return 1;
if (!(set_info & PROTECTED_DACL_SECURITY_INFORMATION))
{
char *child_name = fd_get_unix_name( fd );
if (child_name)
{
struct security_descriptor *parent_sd;
parent_sd = file_get_parent_sd( NULL, child_name, strlen(child_name),
S_ISDIR(st.st_mode) );
free( child_name );
if (parent_sd)
{
tmp_sd = file_combine_sds( parent_sd, sd );
if (tmp_sd) sd = tmp_sd; /* only used combined sd if successful */
free( parent_sd );
}
}
}
if (set_info & OWNER_SECURITY_INFORMATION)
{
owner = sd_get_owner( sd );
if (!owner)
{
set_error( STATUS_INVALID_SECURITY_DESCR );
ret = 0;
goto err;
}
if (!obj->sd || !security_equal_sid( owner, sd_get_owner( obj->sd ) ))
{
/* FIXME: get Unix uid and call fchown */
}
}
else if (obj->sd)
owner = sd_get_owner( obj->sd );
else
owner = token_get_user( current->process->token );
if (set_info & GROUP_SECURITY_INFORMATION)
{
group = sd_get_group( sd );
if (!group)
{
set_error( STATUS_INVALID_SECURITY_DESCR );
ret = 0;
goto err;
}
if (!obj->sd || !security_equal_sid( group, sd_get_group( obj->sd ) ))
{
/* FIXME: get Unix uid and call fchown */
}
}
else if (obj->sd)
group = sd_get_group( obj->sd );
else
group = token_get_primary_group( current->process->token );
/* group and sacl not supported */
if (set_info & DACL_SECURITY_INFORMATION)
{
/* keep the bits that we don't map to access rights in the ACL */
mode = st.st_mode & (S_ISUID|S_ISGID|S_ISVTX);
mode |= sd_to_mode( sd, owner );
set_xattr_sd( unix_fd, sd, owner, group );
if (((st.st_mode ^ mode) & (S_IRWXU|S_IRWXG|S_IRWXO)) && fchmod( unix_fd, mode ) == -1)
{
file_set_error();
ret = 0;
}
}
err:
free( tmp_sd );
return ret;
}
static void file_flush( struct fd *fd, struct event **event )
{
int unix_fd = get_unix_fd( fd );
if (unix_fd != -1 && fsync( unix_fd ) == -1) file_set_error();
}
/* set a thread context */
static void set_thread_context_ptrace( struct thread *thread, unsigned int flags, const CONTEXT *context )
{
int pid = get_ptrace_pid(thread);
if (flags & CONTEXT_FULL)
{
if (flags & CONTEXT_INTEGER)
{
IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
XREG(37,Xer);
XREG(38,Cr);
}
if (flags & CONTEXT_CONTROL)
{
XREG(32,Iar);
XREG(33,Msr);
XREG(35,Ctr);
XREG(36,Lr);
}
}
if (flags & CONTEXT_FLOATING_POINT)
{
FREG(0);
FREG(1);
FREG(2);
FREG(3);
FREG(4);
FREG(5);
FREG(6);
FREG(7);
FREG(8);
FREG(9);
FREG(10);
FREG(11);
FREG(12);
FREG(13);
FREG(14);
FREG(15);
FREG(16);
FREG(17);
FREG(18);
FREG(19);
FREG(20);
FREG(21);
FREG(22);
FREG(23);
FREG(24);
FREG(25);
FREG(26);
FREG(27);
FREG(28);
FREG(29);
FREG(30);
FREG(31);
#undef FREG
XREG((48+32*2),Fpscr);
}
return;
error:
file_set_error();
}
/* retrieve a thread context */
static void get_thread_context_ptrace( struct thread *thread, unsigned int flags, CONTEXT *context )
{
int pid = get_ptrace_pid(thread);
if (flags & CONTEXT_INTEGER)
{
#define XREG(x,y) if (ptrace( PTRACE_PEEKUSER, pid, (void*)(x<<2), &context->y) == -1) goto error;
#define IREG(x) if (ptrace( PTRACE_PEEKUSER, pid, (void*)(x<<2), &context->Gpr##x) == -1) goto error;
IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
#undef IREG
XREG(37,Xer);
XREG(38,Cr);
context->ContextFlags |= CONTEXT_INTEGER;
}
if (flags & CONTEXT_CONTROL)
{
XREG(32,Iar);
XREG(33,Msr);
XREG(35,Ctr);
XREG(36,Lr); /* 36 is LNK ... probably Lr ? */
context->ContextFlags |= CONTEXT_CONTROL;
}
if (flags & CONTEXT_FLOATING_POINT)
{
#define FREG(x) if (ptrace( PTRACE_PEEKUSER, pid, (void*)((48+x*2)<<2), &context->Fpr##x) == -1) goto error;
FREG(0);
FREG(1);
FREG(2);
FREG(3);
FREG(4);
FREG(5);
FREG(6);
FREG(7);
FREG(8);
FREG(9);
FREG(10);
FREG(11);
FREG(12);
FREG(13);
FREG(14);
FREG(15);
FREG(16);
FREG(17);
FREG(18);
FREG(19);
FREG(20);
FREG(21);
FREG(22);
FREG(23);
FREG(24);
FREG(25);
FREG(26);
FREG(27);
FREG(28);
FREG(29);
FREG(30);
FREG(31);
XREG((48+32*2),Fpscr);
context->ContextFlags |= CONTEXT_FLOATING_POINT;
}
return;
error:
file_set_error();
}
static obj_handle_t file_flush( struct fd *fd, const async_data_t *async, int blocking )
{
int unix_fd = get_unix_fd( fd );
if (unix_fd != -1 && fsync( unix_fd ) == -1) file_set_error();
return 0;
}
static struct object *create_mapping( struct object *root, const struct unicode_str *name,
unsigned int attr, mem_size_t size, unsigned int flags,
obj_handle_t handle, unsigned int file_access,
const struct security_descriptor *sd )
{
struct mapping *mapping;
struct file *file;
struct fd *fd;
int unix_fd;
struct stat st;
if (!page_mask) page_mask = sysconf( _SC_PAGESIZE ) - 1;
if (!(mapping = create_named_object( root, &mapping_ops, name, attr, sd )))
return NULL;
if (get_error() == STATUS_OBJECT_NAME_EXISTS)
return &mapping->obj; /* Nothing else to do */
mapping->size = size;
mapping->fd = NULL;
mapping->shared = NULL;
mapping->committed = NULL;
if (!(mapping->flags = get_mapping_flags( handle, flags ))) goto error;
if (handle)
{
const unsigned int sharing = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
unsigned int mapping_access = FILE_MAPPING_ACCESS;
if (!(file = get_file_obj( current->process, handle, file_access ))) goto error;
fd = get_obj_fd( (struct object *)file );
/* file sharing rules for mappings are different so we use magic the access rights */
if (flags & SEC_IMAGE) mapping_access |= FILE_MAPPING_IMAGE;
else if (file_access & FILE_WRITE_DATA) mapping_access |= FILE_MAPPING_WRITE;
if (!(mapping->fd = get_fd_object_for_mapping( fd, mapping_access, sharing )))
{
mapping->fd = dup_fd_object( fd, mapping_access, sharing, FILE_SYNCHRONOUS_IO_NONALERT );
if (mapping->fd) set_fd_user( mapping->fd, &mapping_fd_ops, NULL );
}
release_object( file );
release_object( fd );
if (!mapping->fd) goto error;
if ((unix_fd = get_unix_fd( mapping->fd )) == -1) goto error;
if (fstat( unix_fd, &st ) == -1)
{
file_set_error();
goto error;
}
if (flags & SEC_IMAGE)
{
unsigned int err = get_image_params( mapping, st.st_size, unix_fd );
if (!err) return &mapping->obj;
set_error( err );
goto error;
}
if (!mapping->size)
{
if (!(mapping->size = st.st_size))
{
set_error( STATUS_MAPPED_FILE_SIZE_ZERO );
goto error;
}
}
else if (st.st_size < mapping->size)
{
if (!(file_access & FILE_WRITE_DATA))
{
set_error( STATUS_SECTION_TOO_BIG );
goto error;
}
if (!grow_file( unix_fd, mapping->size )) goto error;
}
}
else /* Anonymous mapping (no associated file) */
{
if (!mapping->size)
{
set_error( STATUS_INVALID_PARAMETER );
goto error;
}
if ((flags & SEC_RESERVE) && !(mapping->committed = create_ranges())) goto error;
mapping->size = (mapping->size + page_mask) & ~((mem_size_t)page_mask);
if ((unix_fd = create_temp_file( mapping->size )) == -1) goto error;
if (!(mapping->fd = create_anonymous_fd( &mapping_fd_ops, unix_fd, &mapping->obj,
FILE_SYNCHRONOUS_IO_NONALERT ))) goto error;
allow_fd_caching( mapping->fd );
}
return &mapping->obj;
error:
release_object( mapping );
return NULL;
}
