/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_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.
+ * 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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 OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_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.
- *
- * 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 <mach/vm_param.h>
#include <pexpert/pexpert.h>
#include <IOKit/IOHibernatePrivate.h>
-extern unsigned char rootdevice[];
-extern struct mach_header _mh_execute_header;
-
-static int kernel_symfile_opened = 0;
-static int error_code = 0;
-
-extern int IODTGetLoaderInfo(char *key, void **infoAddr, int *infoSize);
-extern void IODTFreeLoaderInfo(char *key, void *infoAddr, int infoSize);
-
-/*
- * Can only operate against currently running 32 bit mach_kernel
+/* This function is called from kern_sysctl in the current process context;
+ * it is exported with the System6.0.exports, but this appears to be a legacy
+ * export, as there are no internal consumers.
*/
-static int
-output_kernel_symbols(struct proc *p)
-{
- struct vnode *vp;
- 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 section *se, *const_text;
- struct symtab_command *st, *orig_st;
- struct nlist *sym;
- vm_size_t orig_mhsize, orig_st_size;
- vm_offset_t header;
- vm_size_t header_size = 0; /* out: protected by header */
- int error, error1;
- unsigned int i, j;
- caddr_t addr;
- vm_offset_t offset;
- int rc_mh, rc_sc;
-
- error = EFAULT;
-
- vp = NULL;
- header = NULL;
- orig_mh = NULL;
- orig_st = NULL;
-
- // Dispose of unnecessary gumf, the booter doesn't need to load these
- rc_mh = IODTGetLoaderInfo("Kernel-__HEADER",
- (void **)&orig_mh, &orig_mhsize);
- if (rc_mh == 0 && orig_mh)
- IODTFreeLoaderInfo("Kernel-__HEADER",
- (void *)orig_mh, round_page_32(orig_mhsize));
-
- rc_sc = IODTGetLoaderInfo("Kernel-__SYMTAB",
- (void **) &orig_st, &orig_st_size);
- if (rc_sc == 0 && orig_st)
- IODTFreeLoaderInfo("Kernel-__SYMTAB",
- (void *)orig_st, round_page_32(orig_st_size));
-
- 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;
-
- 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;
-
- /* Don't dump to non-regular files or files with links. */
- error = EFAULT;
- 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_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
- // as all Kernel extensions must be of type MH_OBJECT
- orig_ds = orig_ts = orig_le = NULL;
- orig_st = NULL;
- orig_mh = &_mh_execute_header;
- cmd = (struct load_command *) &orig_mh[1];
- for (i = 0; i < orig_mh->ncmds; i++) {
- if (cmd->cmd == LC_SEGMENT) {
- struct segment_command *orig_sg = (struct segment_command *) cmd;
-
- 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;
-
- cmd = (struct load_command *) ((caddr_t) cmd + cmd->cmdsize);
- }
-
- if (!orig_ts || !orig_ds || !orig_le || !orig_st)
- goto out;
-
- const_text = NULL;
- se = (struct section *) &orig_ts[1];
- for (i = 0; i < orig_ts->nsects; i++, se++) {
- if (!strcmp("__const", se->sectname)) {
- const_text = se;
- break;
- }
- }
- if (!const_text)
- goto out;
-
- header_size = sizeof(struct mach_header)
- + orig_ts->cmdsize
- + orig_ds->cmdsize
- + sizeof(struct symtab_command);
-
- (void) kmem_alloc(kernel_map,
- (vm_offset_t *) &header,
- (vm_size_t) header_size);
- if (header)
- bzero((void *) header, header_size);
- else
- goto out;
-
- /*
- * Set up Mach-O header.
- */
- mh = (struct mach_header *) header;
- mh->magic = orig_mh->magic;
- mh->cputype = orig_mh->cputype;
- mh->cpusubtype = orig_mh->cpusubtype;
- mh->filetype = orig_mh->filetype;
- mh->ncmds = 3;
- mh->sizeofcmds = header_size - sizeof(struct mach_header);
- mh->flags = orig_mh->flags;
-
- // Initialise the current file offset and addr
- offset = round_page(header_size);
- addr = (caddr_t) const_text->addr; // Load address of __TEXT,__const
-
- /*
- * Construct a TEXT segment load command
- * the only part of the TEXT segment we keep is the __TEXT,__const
- * which contains the kernel vtables.
- */
- sg = (struct segment_command *) &mh[1];
- bcopy(orig_ts, sg, orig_ts->cmdsize);
- sg->vmaddr = (unsigned long) addr;
- sg->vmsize = const_text->size;
- sg->fileoff = 0;
- sg->filesize = const_text->size + round_page(header_size);
- sg->maxprot = 0;
- sg->initprot = 0;
- sg->flags = 0;
- se = (struct section *)(sg+1);
- for ( j = 0; j < sg->nsects; j++, se++ ) {
- se->addr = (unsigned long) addr;
- se->size = 0;
- se->offset = offset;
- se->nreloc = 0;
- if (!strcmp("__const", se->sectname)) {
- se->size = const_text->size;
- addr += const_text->size;
- offset += const_text->size;
- const_text = se;
- }
- }
- offset = round_page(offset);
-
- // Now copy of the __DATA segment load command, the image need
- // not be stored to disk nobody needs it, yet!
- sg = (struct segment_command *)((int)sg + sg->cmdsize);
- bcopy(orig_ds, sg, orig_ds->cmdsize);
-
- sg->vmaddr = (unsigned long) addr;
- sg->vmsize = 0x1000; // One page for some reason?
- sg->fileoff = offset;
- sg->filesize = 0;
- sg->maxprot = 0;
- sg->initprot = 0;
- sg->flags = 0;
- se = (struct section *)(sg+1);
- for ( j = 0; j < sg->nsects; j++, se++ ) {
- se->addr = (unsigned long) addr;
- se->size = 0;
- se->offset = offset;
- se->nreloc = 0;
- }
- offset = round_page(offset);
-
-
- /*
- * Set up LC_SYMTAB command
- */
- st = (struct symtab_command *)((int)sg + sg->cmdsize);
- st->cmd = LC_SYMTAB;
- st->cmdsize = sizeof(struct symtab_command);
- st->symoff = offset;
- st->nsyms = orig_st->nsyms;
- st->strsize = orig_st->strsize;
- st->stroff = offset + st->nsyms * sizeof(struct nlist);
-
- /*
- * Convert the symbol table in place from section references
- * to absolute references.
- */
- sym = (struct nlist *) orig_le->vmaddr;
- for (i = 0; i < st->nsyms; i++, sym++ ) {
- if ( (sym->n_type & N_TYPE) == N_SECT) {
- sym->n_sect = NO_SECT;
- sym->n_type = (sym->n_type & ~N_TYPE) | N_ABS;
- }
- }
-
- /*
- * 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_SYSSPACE32, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
- if (error)
- goto out;
-
- /*
- * Write out the __TEXT,__const data segment.
- */
- error = vn_rdwr(UIO_WRITE, vp, (caddr_t) const_text->addr,
- const_text->size, const_text->offset,
- UIO_SYSSPACE32, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
- if (error)
- goto out;
-
- /*
- * Write out kernel symbols
- */
- 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_SYSSPACE32, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
-out:
- if (header)
- kmem_free(kernel_map, header, header_size);
-
- if (vp) {
- error1 = vnode_close(vp, FWRITE, &context);
- if (!error) error = error1;
- }
-
- return(error);
-}
-/*
- *
- */
-int get_kernel_symfile(struct proc *p, char **symfile)
+int
+get_kernel_symfile(__unused proc_t p, __unused char const **symfile)
{
- if (!kernel_symfile_opened) {
- kernel_symfile_opened = 1;
- error_code = output_kernel_symbols(p);
- }
- if (!error_code)
- *symfile = "\\mach.sym";
-
- return error_code;
+ return KERN_FAILURE;
}
struct kern_direct_file_io_ref_t
{
- struct vfs_context context;
+ vfs_context_t ctx;
struct vnode *vp;
};
{
struct kern_direct_file_io_ref_t * ref;
- struct proc *p;
- struct ucred *cred;
+ proc_t p;
struct vnode_attr va;
int error;
off_t f_offset;
ref->vp = NULL;
p = current_proc(); // kernproc;
- cred = p->p_ucred;
- ref->context.vc_proc = p;
- ref->context.vc_ucred = cred;
+ ref->ctx = vfs_context_create(vfs_context_current());
- if ((error = vnode_open(name, (O_CREAT | FWRITE), (0), 0, &ref->vp, &ref->context)))
+ if ((error = vnode_open(name, (O_CREAT | FWRITE), (0), 0, &ref->vp, ref->ctx)))
goto out;
VATTR_INIT(&va);
VATTR_WANTED(&va, va_data_size);
VATTR_WANTED(&va, va_nlink);
error = EFAULT;
- if (vnode_getattr(ref->vp, &va, &ref->context))
+ if (vnode_getattr(ref->vp, &va, ref->ctx))
goto out;
kprintf("vp va_rdev major %d minor %d\n", major(va.va_rdev), minor(va.va_rdev));
device = va.va_rdev;
p1 = ref->vp;
- p2 = &ref->context;
+ p2 = ref->ctx;
do_ioctl = &device_ioctl;
}
else
if (error && ref) {
if (ref->vp) {
- vnode_close(ref->vp, FWRITE, &ref->context);
- ref->vp = NULLVP;
+ vnode_close(ref->vp, FWRITE, ref->ctx);
+ ref->vp = NULLVP;
}
+ vfs_context_rele(ref->ctx);
kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
ref = NULL;
}
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));
+ vfs_context_ucred(ref->ctx), (int *) 0,
+ vfs_context_proc(ref->ctx)));
}
void
int error;
if (ref->vp) {
- error = vnode_close(ref->vp, FWRITE, &ref->context);
+ error = vnode_close(ref->vp, FWRITE, ref->ctx);
+ ref->vp = NULLVP;
kprintf("vnode_close(%d)\n", error);
- ref->vp = NULLVP;
}
+ vfs_context_rele(ref->ctx);
+ ref->ctx = NULL;
kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
}
}
+
projects / apple / xnu.git / blobdiff