/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ #if 0 // dead code #include <debug.h> #include <mach_debug.h> #include <mach/ppc/thread_status.h> #include <mach/vm_types.h> #include <kern/thread.h> #include <kern/misc_protos.h> #include <ppc/proc_reg.h> #include <ppc/pmap.h> #include <ppc/misc_protos.h> #include <ppc/exception.h> /* * copyin/out_multiple - the assembler copyin/out functions jump to C for * help when the copyin lies over a segment boundary. The C breaks * down the copy into two sub-copies and re-calls the assembler with * these sub-copies. Very rare occurrance. Warning: These functions are * called whilst active_thread->thread_recover is still set. */ extern boolean_t copyin_multiple(const char *src, char *dst, vm_size_t count); boolean_t copyin_multiple(const char *src, char *dst, vm_size_t count) { const char *midpoint; vm_size_t first_count; boolean_t first_result; /* Assert that we've been called because of a segment boundary, * this function is more expensive than the assembler, and should * only be called in this difficult case. */ assert(((vm_offset_t)src & 0xF0000000) != ((vm_offset_t)(src + count -1) & 0xF0000000)); /* TODO NMGS define sensible constants for segments, and apply * to C and assembler (assembler is much harder) */ midpoint = (const char*) ((vm_offset_t)(src + count) & 0xF0000000); first_count = (midpoint - src); first_result = copyin(CAST_USER_ADDR_T(src), dst, first_count); /* If there was an error, stop now and return error */ if (first_result != 0) return first_result; /* otherwise finish the job and return result */ return copyin(CAST_USER_ADDR_T(midpoint), dst + first_count, count-first_count); } extern int copyout_multiple(const char *src, char *dst, vm_size_t count); int copyout_multiple(const char *src, char *dst, vm_size_t count) { char *midpoint; vm_size_t first_count; boolean_t first_result; /* Assert that we've been called because of a segment boundary, * this function is more expensive than the assembler, and should * only be called in this difficult case. For copyout, the * segment boundary is on the dst */ assert(((vm_offset_t)dst & 0xF0000000) != ((vm_offset_t)(dst + count - 1) & 0xF0000000)); /* TODO NMGS define sensible constants for segments, and apply * to C and assembler (assembler is much harder) */ midpoint = (char *) ((vm_offset_t)(dst + count) & 0xF0000000); first_count = (midpoint - dst); first_result = copyout(src, CAST_USER_ADDR_T(dst), first_count); /* If there was an error, stop now and return error */ if (first_result != 0) return first_result; /* otherwise finish the job and return result */ return copyout(src + first_count, CAST_USER_ADDR_T(midpoint), count-first_count); } #endif // dead code