From bb578426253ab9950cc20b4e5dd6aefb5500144f Mon Sep 17 00:00:00 2001 From: Gennady Sharapov Date: Mon, 7 Nov 2005 00:58:50 -0800 Subject: [PATCH] uml: separate libc-dependent uaccess code The serial UML OS-abstraction layer patch (um/kernel dir). This moves all systemcalls from uaccess_user.c file under os-Linux dir Signed-off-by: Gennady Sharapov Signed-off-by: Jeff Dike Cc: Paolo Giarrusso Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/os-Linux/uaccess.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 arch/um/os-Linux/uaccess.c (limited to 'arch/um/os-Linux/uaccess.c') 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 +#include + +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; +} + -- cgit v1.2.3