/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
*
- * This 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 OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
*
- * @APPLE_LICENSE_HEADER_END@
+ * 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_LICENSE_OSREFERENCE_HEADER_END@
*/
/* Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
*
* File: bsd/kern/kern_symfile.c
*
- * This file contains creates a dummy symbol file for mach_kernel based on
- * the symbol table information passed by the SecondaryLoader/PlatformExpert.
- * This allows us to correctly link other executables (drivers, etc) against the
- * the kernel in cases where the kernel image on the root device does not match
- * the live kernel. This can occur during net-booting where the actual kernel
- * image is obtained from the network via tftp rather than the root
- * device.
+ * This file contains creates a dummy symbol file for mach_kernel
+ * based on the symbol table information passed by the
+ * SecondaryLoader/PlatformExpert. This allows us to correctly
+ * link other executables (drivers, etc) against the the kernel in
+ * cases where the kernel image on the root device does not match
+ * the live kernel. This can occur during net-booting where the
+ * actual kernel image is obtained from the network via tftp rather
+ * than the root device.
*
- * If a symbol table is available, then the file /mach.sym will be created
- * containing a Mach Header and a LC_SYMTAB load command followed by the
- * the symbol table data for mach_kernel.
+ * If a symbol table is available, then the file /mach.sym will be
+ * created containing a Mach Header and a LC_SYMTAB load command
+ * followed by the the symbol table data for mach_kernel.
+ *
+ * NOTE: This file supports only 32 bit kernels at the present time;
+ * adding support for 64 bit kernels is possible, but is not
+ * necessary at the present time.
*
* HISTORY
*
#include <sys/signalvar.h>
#include <sys/resourcevar.h>
#include <sys/namei.h>
-#include <sys/vnode.h>
-#include <sys/proc.h>
+#include <sys/vnode_internal.h>
+#include <sys/proc_internal.h>
+#include <sys/kauth.h>
#include <sys/timeb.h>
#include <sys/times.h>
-#include <sys/buf.h>
#include <sys/acct.h>
-#include <sys/file.h>
+#include <sys/file_internal.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/stat.h>
+#include <sys/disk.h>
+#include <sys/conf.h>
#include <mach-o/loader.h>
#include <mach-o/nlist.h>
+#include <kern/kalloc.h>
#include <vm/vm_kern.h>
+#include <pexpert/pexpert.h>
+#include <IOKit/IOHibernatePrivate.h>
extern unsigned char rootdevice[];
extern struct mach_header _mh_execute_header;
extern void IODTFreeLoaderInfo(char *key, void *infoAddr, int infoSize);
/*
- *
+ * Can only operate against currently running 32 bit mach_kernel
*/
-static int output_kernel_symbols(struct proc *p)
+static int
+output_kernel_symbols(struct proc *p)
{
struct vnode *vp;
- struct pcred *pcred = p->p_cred;
- struct ucred *cred = pcred->pc_ucred;
- struct nameidata nd;
- struct vattr vattr;
+ kauth_cred_t cred = p->p_ucred; /* XXX */
+ struct vnode_attr va;
+ struct vfs_context context;
struct load_command *cmd;
struct mach_header *orig_mh, *mh;
struct segment_command *orig_ds, *orig_ts, *orig_le, *sg;
struct nlist *sym;
vm_size_t orig_mhsize, orig_st_size;
vm_offset_t header;
- vm_size_t header_size;
+ vm_size_t header_size = 0; /* out: protected by header */
int error, error1;
- int i, j;
+ unsigned int i, j;
caddr_t addr;
vm_offset_t offset;
int rc_mh, rc_sc;
IODTFreeLoaderInfo("Kernel-__SYMTAB",
(void *)orig_st, round_page_32(orig_st_size));
- if (pcred->p_svuid != pcred->p_ruid || pcred->p_svgid != pcred->p_rgid)
+ if (cred->cr_svuid != cred->cr_ruid || cred->cr_svgid != cred->cr_rgid)
goto out;
// Check to see if the root is 'e' or 'n', is this a test for network?
if (rootdevice[0] == 'e' && rootdevice[1] == 'n')
goto out;
- NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "mach.sym", p);
- if((error = vn_open(&nd, O_CREAT | FWRITE, S_IRUSR | S_IRGRP | S_IROTH))) goto out;
+ context.vc_proc = p;
+ context.vc_ucred = cred;
+
+ if ((error = vnode_open("mach.sym", (O_CREAT | FWRITE), (S_IRUSR | S_IRGRP | S_IROTH), 0, &vp, &context)))
+ goto out;
- vp = nd.ni_vp;
-
/* Don't dump to non-regular files or files with links. */
error = EFAULT;
- if (vp->v_type != VREG || VOP_GETATTR(vp, &vattr, cred, p)
- || vattr.va_nlink != 1)
+ VATTR_INIT(&va);
+ VATTR_WANTED(&va, va_nlink);
+ if ((vp->v_type != VREG) || vnode_getattr(vp, &va, &context) || (va.va_nlink != 1))
goto out;
- VATTR_NULL(&vattr);
- vattr.va_size = 0;
- VOP_LEASE(vp, p, cred, LEASE_WRITE);
- VOP_SETATTR(vp, &vattr, cred, p);
+ VATTR_INIT(&va); /* better to do it here than waste more stack in vnode_getsize */
+ VATTR_SET(&va, va_data_size, 0);
+ vnode_setattr(vp, &va, &context);
p->p_acflag |= ACORE;
// If the file type is MH_EXECUTE then this must be a kernel
cmd = (struct load_command *) &orig_mh[1];
for (i = 0; i < orig_mh->ncmds; i++) {
if (cmd->cmd == LC_SEGMENT) {
- struct segment_command *sg = (struct segment_command *) cmd;
+ struct segment_command *orig_sg = (struct segment_command *) cmd;
- if (!strcmp(SEG_TEXT, sg->segname))
- orig_ts = sg;
- else if (!strcmp(SEG_DATA, sg->segname))
- orig_ds = sg;
- else if (!strcmp(SEG_LINKEDIT, sg->segname))
- orig_le = sg;
+ if (!strcmp(SEG_TEXT, orig_sg->segname))
+ orig_ts = orig_sg;
+ else if (!strcmp(SEG_DATA, orig_sg->segname))
+ orig_ds = orig_sg;
+ else if (!strcmp(SEG_LINKEDIT, orig_sg->segname))
+ orig_le = orig_sg;
}
else if (cmd->cmd == LC_SYMTAB)
orig_st = (struct symtab_command *) cmd;
+ orig_ds->cmdsize
+ sizeof(struct symtab_command);
- (void) kmem_alloc_wired(kernel_map,
+ (void) kmem_alloc(kernel_map,
(vm_offset_t *) &header,
(vm_size_t) header_size);
if (header)
mh->flags = orig_mh->flags;
// Initialise the current file offset and addr
- offset = round_page_32(header_size);
+ offset = round_page(header_size);
addr = (caddr_t) const_text->addr; // Load address of __TEXT,__const
/*
sg->vmaddr = (unsigned long) addr;
sg->vmsize = const_text->size;
sg->fileoff = 0;
- sg->filesize = const_text->size + round_page_32(header_size);
+ sg->filesize = const_text->size + round_page(header_size);
sg->maxprot = 0;
sg->initprot = 0;
sg->flags = 0;
const_text = se;
}
}
- offset = round_page_32((vm_address_t) offset);
+ offset = round_page(offset);
// Now copy of the __DATA segment load command, the image need
// not be stored to disk nobody needs it, yet!
se->offset = offset;
se->nreloc = 0;
}
- offset = round_page_32(offset);
+ offset = round_page(offset);
/*
* Write out the load commands at the beginning of the file.
*/
error = vn_rdwr(UIO_WRITE, vp, (caddr_t) mh, header_size, (off_t) 0,
- UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
+ UIO_SYSSPACE32, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
if (error)
goto out;
*/
error = vn_rdwr(UIO_WRITE, vp, (caddr_t) const_text->addr,
const_text->size, const_text->offset,
- UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
+ UIO_SYSSPACE32, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
if (error)
goto out;
offset = st->nsyms * sizeof(struct nlist) + st->strsize; // symtab size
error = vn_rdwr(UIO_WRITE, vp,
(caddr_t) orig_le->vmaddr, offset, st->symoff,
- UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
- if (error)
- goto out;
-
+ UIO_SYSSPACE32, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
out:
if (header)
kmem_free(kernel_map, header, header_size);
if (vp) {
- VOP_UNLOCK(vp, 0, p);
- error1 = vn_close(vp, FWRITE, cred, p);
+ error1 = vnode_close(vp, FWRITE, &context);
if (!error) error = error1;
}
return error_code;
}
+
+struct kern_direct_file_io_ref_t
+{
+ struct vfs_context context;
+ struct vnode *vp;
+};
+
+
+static int file_ioctl(void * p1, void * p2, int theIoctl, caddr_t result)
+{
+ dev_t device = (dev_t) p1;
+
+ return ((*bdevsw[major(device)].d_ioctl)
+ (device, theIoctl, result, S_IFBLK, p2));
+}
+
+static int device_ioctl(void * p1, __unused void * p2, int theIoctl, caddr_t result)
+{
+ return (VNOP_IOCTL(p1, theIoctl, result, 0, p2));
+}
+
+struct kern_direct_file_io_ref_t *
+kern_open_file_for_direct_io(const char * name,
+ kern_get_file_extents_callback_t callback,
+ void * callback_ref,
+ dev_t * device_result,
+ uint64_t * partitionbase_result,
+ uint64_t * maxiocount_result)
+{
+ struct kern_direct_file_io_ref_t * ref;
+
+ struct proc *p;
+ struct ucred *cred;
+ struct vnode_attr va;
+ int error;
+ off_t f_offset;
+ uint32_t blksize;
+ uint64_t size;
+ dev_t device;
+ off_t maxiocount, count;
+
+ int (*do_ioctl)(void * p1, void * p2, int theIoctl, caddr_t result);
+ void * p1;
+ void * p2;
+
+ error = EFAULT;
+
+ ref = (struct kern_direct_file_io_ref_t *) kalloc(sizeof(struct kern_direct_file_io_ref_t));
+ if (!ref)
+ {
+ error = EFAULT;
+ goto out;
+ }
+
+ ref->vp = NULL;
+ p = current_proc(); // kernproc;
+ cred = p->p_ucred;
+ ref->context.vc_proc = p;
+ ref->context.vc_ucred = cred;
+
+ if ((error = vnode_open(name, (O_CREAT | FWRITE), (0), 0, &ref->vp, &ref->context)))
+ goto out;
+
+ VATTR_INIT(&va);
+ VATTR_WANTED(&va, va_rdev);
+ VATTR_WANTED(&va, va_fsid);
+ VATTR_WANTED(&va, va_data_size);
+ VATTR_WANTED(&va, va_nlink);
+ error = EFAULT;
+ if (vnode_getattr(ref->vp, &va, &ref->context))
+ goto out;
+
+ kprintf("vp va_rdev major %d minor %d\n", major(va.va_rdev), minor(va.va_rdev));
+ kprintf("vp va_fsid major %d minor %d\n", major(va.va_fsid), minor(va.va_fsid));
+ kprintf("vp size %qd\n", va.va_data_size);
+
+ if (ref->vp->v_type == VREG)
+ {
+ /* Don't dump files with links. */
+ if (va.va_nlink != 1)
+ goto out;
+
+ device = va.va_fsid;
+ p1 = (void *) device;
+ p2 = p;
+ do_ioctl = &file_ioctl;
+ }
+ else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
+ {
+ /* Partition. */
+ device = va.va_rdev;
+
+ p1 = ref->vp;
+ p2 = &ref->context;
+ do_ioctl = &device_ioctl;
+ }
+ else
+ {
+ /* Don't dump to non-regular files. */
+ error = EFAULT;
+ goto out;
+ }
+
+ // get partition base
+
+ error = do_ioctl(p1, p2, DKIOCGETBASE, (caddr_t) partitionbase_result);
+ if (error)
+ goto out;
+
+ // get block size & constraints
+
+ error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &blksize);
+ if (error)
+ goto out;
+
+ maxiocount = 1*1024*1024*1024;
+
+ error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTREAD, (caddr_t) &count);
+ if (error)
+ count = 0;
+ count *= blksize;
+ if (count && (count < maxiocount))
+ maxiocount = count;
+
+ error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTWRITE, (caddr_t) &count);
+ if (error)
+ count = 0;
+ count *= blksize;
+ if (count && (count < maxiocount))
+ maxiocount = count;
+
+ error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTREAD, (caddr_t) &count);
+ if (error)
+ count = 0;
+ if (count && (count < maxiocount))
+ maxiocount = count;
+
+ error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTWRITE, (caddr_t) &count);
+ if (error)
+ count = 0;
+ if (count && (count < maxiocount))
+ maxiocount = count;
+
+ error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTREAD, (caddr_t) &count);
+ if (error)
+ count = 0;
+ if (count && (count < maxiocount))
+ maxiocount = count;
+
+ error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTWRITE, (caddr_t) &count);
+ if (error)
+ count = 0;
+ if (count && (count < maxiocount))
+ maxiocount = count;
+
+ kprintf("max io 0x%qx bytes\n", maxiocount);
+ if (maxiocount_result)
+ *maxiocount_result = maxiocount;
+
+ // generate the block list
+
+ error = 0;
+ if (ref->vp->v_type == VREG)
+ {
+ f_offset = 0;
+ while(f_offset < (off_t) va.va_data_size)
+ {
+ size_t io_size = 1*1024*1024*1024;
+ daddr64_t blkno;
+
+ error = VNOP_BLOCKMAP(ref->vp, f_offset, io_size, &blkno, (size_t *)&io_size, NULL, 0, NULL);
+ if (error)
+ goto out;
+ callback(callback_ref, ((uint64_t) blkno) * blksize, (uint64_t) io_size);
+ f_offset += io_size;
+ }
+ callback(callback_ref, 0ULL, 0ULL);
+ }
+ else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
+ {
+ error = do_ioctl(p1, p2, DKIOCGETBLOCKCOUNT, (caddr_t) &size);
+ if (error)
+ goto out;
+ size *= blksize;
+ callback(callback_ref, 0ULL, size);
+ callback(callback_ref, size, 0ULL);
+ }
+
+ if (device_result)
+ *device_result = device;
+
+out:
+ kprintf("kern_open_file_for_direct_io(%d)\n", error);
+
+ if (error && ref) {
+ if (ref->vp)
+ vnode_close(ref->vp, FWRITE, &ref->context);
+
+ kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
+ }
+
+ return(ref);
+}
+
+int
+kern_write_file(struct kern_direct_file_io_ref_t * ref, off_t offset, caddr_t addr, vm_size_t len)
+{
+ return (vn_rdwr(UIO_WRITE, ref->vp,
+ addr, len, offset,
+ UIO_SYSSPACE32, IO_SYNC|IO_NODELOCKED|IO_UNIT,
+ ref->context.vc_ucred, (int *) 0, ref->context.vc_proc));
+}
+
+void
+kern_close_file_for_direct_io(struct kern_direct_file_io_ref_t * ref)
+{
+ kprintf("kern_close_file_for_direct_io\n");
+
+ if (ref) {
+ int error;
+
+ if (ref->vp) {
+ error = vnode_close(ref->vp, FWRITE, &ref->context);
+ kprintf("vnode_close(%d)\n", error);
+ }
+ kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
+ }
+}
projects / apple / xnu.git / blobdiff