diff options
Diffstat (limited to 'arch/um/os-Linux')
| -rw-r--r-- | arch/um/os-Linux/Makefile | 4 | ||||
| -rw-r--r-- | arch/um/os-Linux/uaccess.c | 32 |
2 files changed, 34 insertions, 2 deletions
diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile index d15ec2af6a2..d389c58b18b 100644 --- a/arch/um/os-Linux/Makefile +++ b/arch/um/os-Linux/Makefile @@ -4,10 +4,10 @@ # obj-y = aio.o elf_aux.o file.o mem.o process.o signal.o start_up.o time.o \ - tt.o tty.o user_syms.o drivers/ sys-$(SUBARCH)/ + tt.o tty.o uaccess.o user_syms.o drivers/ sys-$(SUBARCH)/ USER_OBJS := aio.o elf_aux.o file.o mem.o process.o signal.o start_up.o \ - time.o tt.o tty.o + time.o tt.o tty.o uaccess.o elf_aux.o: $(ARCH_DIR)/kernel-offsets.h CFLAGS_elf_aux.o += -I$(objtree)/arch/um diff --git a/arch/um/os-Linux/uaccess.c b/arch/um/os-Linux/uaccess.c new file mode 100644 index 00000000000..38d710158c3 --- /dev/null +++ b/arch/um/os-Linux/uaccess.c @@ -0,0 +1,32 @@ +/* + * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk) + * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <setjmp.h> +#include <string.h> + +unsigned long __do_user_copy(void *to, const void *from, int n, + void **fault_addr, void **fault_catcher, + void (*op)(void *to, const void *from, + int n), int *faulted_out) +{ + unsigned long *faddrp = (unsigned long *) fault_addr, ret; + + sigjmp_buf jbuf; + *fault_catcher = &jbuf; + if(sigsetjmp(jbuf, 1) == 0){ + (*op)(to, from, n); + ret = 0; + *faulted_out = 0; + } + else { + ret = *faddrp; + *faulted_out = 1; + } + *fault_addr = NULL; + *fault_catcher = NULL; + return ret; +} + |