diff options
| -rw-r--r-- | arch/um/include/os.h | 6 | ||||
| -rw-r--r-- | arch/um/include/uml_uaccess.h | 4 | ||||
| -rw-r--r-- | arch/um/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/um/kernel/tt/uaccess_user.c | 1 | ||||
| -rw-r--r-- | arch/um/kernel/uaccess.c | 30 | ||||
| -rw-r--r-- | arch/um/kernel/uaccess_user.c | 64 | ||||
| -rw-r--r-- | arch/um/os-Linux/Makefile | 4 | ||||
| -rw-r--r-- | arch/um/os-Linux/uaccess.c | 32 |
8 files changed, 72 insertions, 71 deletions
diff --git a/arch/um/include/os.h b/arch/um/include/os.h index 2e58e30..b9f5351 100644 --- a/arch/um/include/os.h +++ b/arch/um/include/os.h @@ -199,6 +199,12 @@ extern void forward_pending_sigio(int target); extern int start_fork_tramp(void *arg, unsigned long temp_stack, int clone_flags, int (*tramp)(void *)); +/* uaccess.c */ +extern 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); + #endif /* diff --git a/arch/um/include/uml_uaccess.h b/arch/um/include/uml_uaccess.h index f77eb64..c0df11d 100644 --- a/arch/um/include/uml_uaccess.h +++ b/arch/um/include/uml_uaccess.h @@ -8,10 +8,6 @@ extern int __do_copy_to_user(void *to, const void *from, int n, void **fault_addr, void **fault_catcher); -extern 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); void __do_copy(void *to, const void *from, int n); #endif diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile index 1a0001b..72fd4ea 100644 --- a/arch/um/kernel/Makefile +++ b/arch/um/kernel/Makefile @@ -10,7 +10,7 @@ obj-y = config.o exec_kern.o exitcode.o \ helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o physmem.o \ process_kern.o ptrace.o reboot.o resource.o sigio_user.o sigio_kern.o \ signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o time.o \ - time_kern.o tlb.o trap_kern.o trap_user.o uaccess_user.o um_arch.o \ + time_kern.o tlb.o trap_kern.o trap_user.o uaccess.o um_arch.o \ umid.o user_util.o obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o diff --git a/arch/um/kernel/tt/uaccess_user.c b/arch/um/kernel/tt/uaccess_user.c index 8c220f0..6c92bbc 100644 --- a/arch/um/kernel/tt/uaccess_user.c +++ b/arch/um/kernel/tt/uaccess_user.c @@ -10,6 +10,7 @@ #include "uml_uaccess.h" #include "task.h" #include "kern_util.h" +#include "os.h" int __do_copy_from_user(void *to, const void *from, int n, void **fault_addr, void **fault_catcher) diff --git a/arch/um/kernel/uaccess.c b/arch/um/kernel/uaccess.c new file mode 100644 index 0000000..054e3de --- /dev/null +++ b/arch/um/kernel/uaccess.c @@ -0,0 +1,30 @@ +/* + * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk) + * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +/* These are here rather than tt/uaccess.c because skas mode needs them in + * order to do SIGBUS recovery when a tmpfs mount runs out of room. + */ + +#include <linux/string.h> +#include "os.h" + +void __do_copy(void *to, const void *from, int n) +{ + memcpy(to, from, n); +} + + +int __do_copy_to_user(void *to, const void *from, int n, + void **fault_addr, void **fault_catcher) +{ + unsigned long fault; + int faulted; + + fault = __do_user_copy(to, from, n, fault_addr, fault_catcher, + __do_copy, &faulted); + if(!faulted) return(0); + else return(n - (fault - (unsigned long) to)); +} diff --git a/arch/um/kernel/uaccess_user.c b/arch/um/kernel/uaccess_user.c deleted file mode 100644 index d035257..0000000 --- a/arch/um/kernel/uaccess_user.c +++ /dev/null @@ -1,64 +0,0 @@ -/* - * 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> - -/* These are here rather than tt/uaccess.c because skas mode needs them in - * order to do SIGBUS recovery when a tmpfs mount runs out of room. - */ - -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; -} - -void __do_copy(void *to, const void *from, int n) -{ - memcpy(to, from, n); -} - - -int __do_copy_to_user(void *to, const void *from, int n, - void **fault_addr, void **fault_catcher) -{ - unsigned long fault; - int faulted; - - fault = __do_user_copy(to, from, n, fault_addr, fault_catcher, - __do_copy, &faulted); - if(!faulted) return(0); - else return(n - (fault - (unsigned long) to)); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile index d15ec2a..d389c58 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 0000000..38d7101 --- /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; +} + |