#undef DEBUG_DARWIN #undef DEBUG_MACH /* $NetBSD: darwin_mman.c,v 1.22 2007/02/09 21:55:16 ad Exp $ */ /*- * Copyright (c) 2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Emmanuel Dreyfus. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: darwin_mman.c,v 1.22 2007/02/09 21:55:16 ad Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include int darwin_sys_load_shared_file(l, v, retval) struct lwp *l; void *v; register_t *retval; { struct darwin_sys_load_shared_file_args /* { syscallarg(char *) filename; syscallarg(caddr_t) addr; syscallarg(u_long) len; syscallarg(caddr_t *) base; syscallarg(int) count: syscallarg(mach_sf_mapping_t *) mappings; syscallarg(int *) flags; } */ *uap = v; struct file *fp; struct filedesc *fdp; struct vnode *vp = NULL; vaddr_t base; struct proc *p = l->l_proc; int flags; char *filename; mach_sf_mapping_t *mapp = NULL; size_t maplen; struct sys_open_args open_cup; struct sys_close_args close_cup; register_t fdc; int fd; int i; int error; vaddr_t max_addr, addr; size_t len; vaddr_t uaddr; int need_relocation; struct exec_vmcmd evc; filename = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); if ((error = copyin(SCARG(uap, filename), filename, MAXPATHLEN)) != 0) goto bad1; if ((error = copyin(SCARG(uap, base), &base, sizeof(base))) != 0) goto bad1; if ((error = copyin(SCARG(uap, flags), &flags, sizeof(base))) != 0) goto bad1; #ifdef DEBUG_DARWIN DPRINTF(("darwin_sys_load_shared_file: filename = %p ", SCARG(uap, filename))); DPRINTF(("addr = %p len = 0x%08lx base = %p ", SCARG(uap, addr), SCARG(uap, len), SCARG(uap, base))); DPRINTF(("count = %d mappings = %p flags = %p ", SCARG(uap, count), SCARG(uap, mappings), SCARG(uap, flags))); DPRINTF(("*base = 0x%08lx *flags = %d filename=`%s'\n", base, flags, filename)); #endif SCARG(&open_cup, path) = SCARG(uap, filename); SCARG(&open_cup, flags) = O_RDONLY; SCARG(&open_cup, mode) = 0; if ((error = bsd_sys_open(l, &open_cup, &fdc)) != 0) goto bad1; fd = (int)fdc; fdp = p->p_fd; fp = fd_getfile(fdp, fd); if (fp == NULL) { error = EBADF; goto bad2; } FILE_USE(fp); vp = (struct vnode *)fp->f_data; vref(vp); if (SCARG(uap, count) < 0 || SCARG(uap, count) > PAGE_SIZE / sizeof(*mapp)) { error = EINVAL; goto bad2; } maplen = SCARG(uap, count) * sizeof(*mapp); mapp = malloc(maplen, M_TEMP, M_WAITOK); if ((error = copyin(SCARG(uap, mappings), mapp, maplen)) != 0) goto bad2; #ifdef DEBUG_DARWIN for (i = 0; i < SCARG(uap, count); i++) { DPRINTF(("mapp[%d].mapping_offset = 0x%08lx\n", i, mapp[i].mapping_offset)); DPRINTF(("mapp[%d].size = 0x%08lx\n", i, (long)mapp[i].size)); DPRINTF(("mapp[%d].file_offset = 0x%08lx\n", i, mapp[i].file_offset)); DPRINTF(("mapp[%d].protection = %d\n", i, mapp[i].protection)); DPRINTF(("mapp[%d].cksum = %ld\n", i, mapp[i].cksum)); } #endif /* Check if we can load at the default addresses */ need_relocation = 0; vm_map_lock(&p->p_vmspace->vm_map); for (i = 0; i < SCARG(uap, count); i++) if ((uvm_map_findspace(&p->p_vmspace->vm_map, base + mapp[i].mapping_offset, mapp[i].size, &uaddr, NULL, 0, 0, UVM_FLAG_FIXED)) == NULL) need_relocation = 1; vm_map_unlock(&p->p_vmspace->vm_map); /* If we cannot, we need a relocation */ if (need_relocation) { DPRINTF(("Relocating\n")); /* Compute the length of the region enclosing all sections */ max_addr = 0; for (i = 0; i < SCARG(uap, count); i++) { addr = (vaddr_t)(mapp[i].mapping_offset + base + mapp[i].size); if (addr > max_addr) max_addr = addr; } len = max_addr - base; DPRINTF(("base = 0x%08lx max_addr = 0x%08lx len = 0x%08x\n", base, max_addr, len)); /* Find some place to map this region */ vm_map_lock(&p->p_vmspace->vm_map); if ((uvm_map_findspace(&p->p_vmspace->vm_map, base, len, &uaddr, NULL, 0, PAGE_SIZE, 0)) == NULL) { DPRINTF(("Impossible to find some space\n")); vm_map_unlock(&p->p_vmspace->vm_map); error = ENOMEM; goto bad2; } vm_map_unlock(&p->p_vmspace->vm_map); /* Update the base address */ base = uaddr; DPRINTF(("New base address: base = 0x%08lx\n", base)); } /* Do the actual mapping */ for (i = 0; i < SCARG(uap, count); i++) { bzero(&evc, sizeof(evc)); evc.ev_addr = base + mapp[i].mapping_offset; evc.ev_len = mapp[i].size; evc.ev_prot = mapp[i].protection & VM_PROT_ALL; evc.ev_flags = 0; if (mapp[i].protection & MACH_VM_PROT_ZF) evc.ev_proc = vmcmd_map_zero; else evc.ev_proc = vmcmd_map_readvn; evc.ev_offset = mapp[i].file_offset; evc.ev_vp = vp; DPRINTF(("map section %d: start = 0x%08lx, len = 0x%08lx\n", i, evc.ev_addr, evc.ev_len)); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); if ((error = (*evc.ev_proc)(l, &evc)) != 0) { VOP_UNLOCK(vp, 0); DPRINTF(("Failed\n")); goto bad2; } VOP_UNLOCK(vp, 0); DPRINTF(("Success\n")); } bad2: if (mapp) free(mapp, M_TEMP); vrele(vp); FILE_UNUSE(fp, l); SCARG(&close_cup, fd) = fd; if ((error = sys_close(l, &close_cup, retval)) != 0) goto bad1; if ((error = copyout(&base, SCARG(uap, base), sizeof(base))) != 0) goto bad1; if ((error = copyout(&flags, SCARG(uap, flags), sizeof(base))) != 0) goto bad1; bad1: free(filename, M_TEMP); return error; }