[apple/xnu.git] / bsd / kern / kern_symfile.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * 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. 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_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.
 *
 * HISTORY
 * 
 *	.
 */

#include <mach/vm_param.h>

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/signalvar.h>
#include <sys/resourcevar.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/proc.h>
#include <sys/timeb.h>
#include <sys/times.h>
#include <sys/buf.h>
#include <sys/acct.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/stat.h>

#include <mach-o/loader.h>
#include <mach-o/nlist.h>

#include <vm/vm_kern.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);

/*
 * 
 */
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;
    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;
    int				error, error1;
    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 && orig_mh)
	IODTFreeLoaderInfo("Kernel-__HEADER",
			    (void *)orig_mh, round_page(orig_mhsize));

    rc_sc = IODTGetLoaderInfo("Kernel-__SYMTAB",
				(void **) &orig_st, &orig_st_size);
    if (rc_sc && orig_st)
	IODTFreeLoaderInfo("Kernel-__SYMTAB",
			    (void *)orig_st, round_page(orig_st_size));

    if (pcred->p_svuid != pcred->p_ruid || pcred->p_svgid != pcred->p_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;

    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)
	goto out;

    VATTR_NULL(&vattr);
    vattr.va_size = 0;
    VOP_LEASE(vp, p, cred, LEASE_WRITE);
    VOP_SETATTR(vp, &vattr, cred, p);
    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 *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;
	}
	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_wired(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((vm_address_t) 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_SYSSPACE, 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_SYSSPACE, 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_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
    if (error)
	goto out;

out:
    if (header)
	kmem_free(kernel_map, header, header_size);

    if (vp) {
	VOP_UNLOCK(vp, 0, p);
	error1 = vn_close(vp, FWRITE, cred, p);
	if (!error) error = error1;
    }

    return(error);
}
/*
 * 
 */
int get_kernel_symfile(struct proc *p, char **symfile)
{
    if (!kernel_symfile_opened) {
        kernel_symfile_opened = 1;
        error_code = output_kernel_symbols(p);
    }
    if (!error_code)
	*symfile = "\\mach.sym";

    return error_code;
}
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
43866e37	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
1c79356b	7	*
43866e37 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
43866e37 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
1c79356b A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/* Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
	26	*
	27	* File: bsd/kern/kern_symfile.c
	28	*
	29	* This file contains creates a dummy symbol file for mach_kernel based on
	30	* the symbol table information passed by the SecondaryLoader/PlatformExpert.
	31	* This allows us to correctly link other executables (drivers, etc) against the
	32	* the kernel in cases where the kernel image on the root device does not match
	33	* the live kernel. This can occur during net-booting where the actual kernel
	34	* image is obtained from the network via tftp rather than the root
	35	* device.
	36	*
	37	* If a symbol table is available, then the file /mach.sym will be created
	38	* containing a Mach Header and a LC_SYMTAB load command followed by the
	39	* the symbol table data for mach_kernel.
	40	*
	41	* HISTORY
	42	*
	43	* .
	44	*/
	45
	46	#include <mach/vm_param.h>
	47
	48	#include <sys/param.h>
	49	#include <sys/systm.h>
	50	#include <sys/signalvar.h>
	51	#include <sys/resourcevar.h>
	52	#include <sys/namei.h>
	53	#include <sys/vnode.h>
	54	#include <sys/proc.h>
	55	#include <sys/timeb.h>
	56	#include <sys/times.h>
	57	#include <sys/buf.h>
	58	#include <sys/acct.h>
	59	#include <sys/file.h>
	60	#include <sys/uio.h>
	61	#include <sys/kernel.h>
	62	#include <sys/stat.h>
	63
	64	#include <mach-o/loader.h>
	65	#include <mach-o/nlist.h>
	66
	67	#include <vm/vm_kern.h>
	68
	69	extern unsigned char rootdevice[];
0b4e3aa0	70	extern struct mach_header _mh_execute_header;
1c79356b	71
0b4e3aa0 A	72	static int kernel_symfile_opened = 0;
0b4e3aa0 A	73	static int error_code = 0;
1c79356b	74
0b4e3aa0 A	75	extern int IODTGetLoaderInfo(char key, void infoAddr, int infoSize);
0b4e3aa0 A	76	extern void IODTFreeLoaderInfo(char key, void infoAddr, int infoSize);
1c79356b A	77
	78	/*
	79	*
	80	*/
0b4e3aa0	81	static int output_kernel_symbols(struct proc *p)
1c79356b	82	{
0b4e3aa0 A	83	struct vnode *vp;
	84	struct pcred *pcred = p->p_cred;
	85	struct ucred *cred = pcred->pc_ucred;
	86	struct nameidata nd;
	87	struct vattr vattr;
	88	struct load_command *cmd;
	89	struct mach_header orig_mh, mh;
	90	struct segment_command orig_ds, orig_ts, orig_le, sg;
	91	struct section se, const_text;
	92	struct symtab_command st, orig_st;
	93	struct nlist *sym;
	94	vm_size_t orig_mhsize, orig_st_size;
	95	vm_offset_t header;
	96	vm_size_t header_size;
	97	int error, error1;
	98	int i, j;
	99	caddr_t addr;
	100	vm_offset_t offset;
	101	int rc_mh, rc_sc;
	102
	103	error = EFAULT;
	104
	105	vp = NULL;
	106	header = NULL;
	107	orig_mh = NULL;
	108	orig_st = NULL;
	109
	110	// Dispose of unnecessary gumf, the booter doesn't need to load these
	111	rc_mh = IODTGetLoaderInfo("Kernel-__HEADER",
	112	(void **)&orig_mh, &orig_mhsize);
	113	if (rc_mh && orig_mh)
	114	IODTFreeLoaderInfo("Kernel-__HEADER",
de355530	115	(void *)orig_mh, round_page(orig_mhsize));
0b4e3aa0 A	116
	117	rc_sc = IODTGetLoaderInfo("Kernel-__SYMTAB",
	118	(void **) &orig_st, &orig_st_size);
	119	if (rc_sc && orig_st)
	120	IODTFreeLoaderInfo("Kernel-__SYMTAB",
de355530	121	(void *)orig_st, round_page(orig_st_size));
0b4e3aa0 A	122
	123	if (pcred->p_svuid != pcred->p_ruid \|\| pcred->p_svgid != pcred->p_rgid)
	124	goto out;
	125
	126	// Check to see if the root is 'e' or 'n', is this a test for network?
	127	if (rootdevice[0] == 'e' && rootdevice[1] == 'n')
	128	goto out;
	129
	130	NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "mach.sym", p);
	131	if((error = vn_open(&nd, O_CREAT \| FWRITE, S_IRUSR \| S_IRGRP \| S_IROTH))) goto out;
	132
	133	vp = nd.ni_vp;
	134
	135	/* Don't dump to non-regular files or files with links. */
	136	error = EFAULT;
	137	if (vp->v_type != VREG \|\| VOP_GETATTR(vp, &vattr, cred, p)
	138	\|\| vattr.va_nlink != 1)
	139	goto out;
	140
	141	VATTR_NULL(&vattr);
	142	vattr.va_size = 0;
	143	VOP_LEASE(vp, p, cred, LEASE_WRITE);
	144	VOP_SETATTR(vp, &vattr, cred, p);
	145	p->p_acflag \|= ACORE;
	146
	147	// If the file type is MH_EXECUTE then this must be a kernel
	148	// as all Kernel extensions must be of type MH_OBJECT
	149	orig_ds = orig_ts = orig_le = NULL;
	150	orig_st = NULL;
	151	orig_mh = &_mh_execute_header;
	152	cmd = (struct load_command *) &orig_mh[1];
	153	for (i = 0; i < orig_mh->ncmds; i++) {
	154	if (cmd->cmd == LC_SEGMENT) {
	155	struct segment_command sg = (struct segment_command ) cmd;
	156
	157	if (!strcmp(SEG_TEXT, sg->segname))
	158	orig_ts = sg;
	159	else if (!strcmp(SEG_DATA, sg->segname))
	160	orig_ds = sg;
	161	else if (!strcmp(SEG_LINKEDIT, sg->segname))
	162	orig_le = sg;
	163	}
	164	else if (cmd->cmd == LC_SYMTAB)
	165	orig_st = (struct symtab_command *) cmd;
	166
	167	cmd = (struct load_command *) ((caddr_t) cmd + cmd->cmdsize);
1c79356b	168	}
1c79356b	169
0b4e3aa0 A	170	if (!orig_ts \|\| !orig_ds \|\| !orig_le \|\| !orig_st)
0b4e3aa0 A	171	goto out;
1c79356b	172
0b4e3aa0 A	173	const_text = NULL;
	174	se = (struct section *) &orig_ts[1];
	175	for (i = 0; i < orig_ts->nsects; i++, se++) {
	176	if (!strcmp("__const", se->sectname)) {
	177	const_text = se;
	178	break;
	179	}
	180	}
	181	if (!const_text)
	182	goto out;
	183
	184	header_size = sizeof(struct mach_header)
	185	+ orig_ts->cmdsize
	186	+ orig_ds->cmdsize
	187	+ sizeof(struct symtab_command);
	188
	189	(void) kmem_alloc_wired(kernel_map,
	190	(vm_offset_t *) &header,
	191	(vm_size_t) header_size);
	192	if (header)
	193	bzero((void *) header, header_size);
	194	else
	195	goto out;
	196
	197	/*
	198	* Set up Mach-O header.
	199	*/
	200	mh = (struct mach_header *) header;
	201	mh->magic = orig_mh->magic;
	202	mh->cputype = orig_mh->cputype;
	203	mh->cpusubtype = orig_mh->cpusubtype;
	204	mh->filetype = orig_mh->filetype;
	205	mh->ncmds = 3;
	206	mh->sizeofcmds = header_size - sizeof(struct mach_header);
	207	mh->flags = orig_mh->flags;
	208
	209	// Initialise the current file offset and addr
de355530	210	offset = round_page(header_size);
0b4e3aa0 A	211	addr = (caddr_t) const_text->addr; // Load address of __TEXT,__const
	212
	213	/*
	214	* Construct a TEXT segment load command
	215	* the only part of the TEXT segment we keep is the __TEXT,__const
	216	* which contains the kernel vtables.
	217	*/
	218	sg = (struct segment_command *) &mh[1];
	219	bcopy(orig_ts, sg, orig_ts->cmdsize);
	220	sg->vmaddr = (unsigned long) addr;
	221	sg->vmsize = const_text->size;
	222	sg->fileoff = 0;
de355530	223	sg->filesize = const_text->size + round_page(header_size);
0b4e3aa0 A	224	sg->maxprot = 0;
	225	sg->initprot = 0;
	226	sg->flags = 0;
	227	se = (struct section *)(sg+1);
	228	for ( j = 0; j < sg->nsects; j++, se++ ) {
	229	se->addr = (unsigned long) addr;
	230	se->size = 0;
	231	se->offset = offset;
	232	se->nreloc = 0;
	233	if (!strcmp("__const", se->sectname)) {
	234	se->size = const_text->size;
	235	addr += const_text->size;
	236	offset += const_text->size;
	237	const_text = se;
	238	}
	239	}
de355530	240	offset = round_page((vm_address_t) offset);
0b4e3aa0 A	241
	242	// Now copy of the __DATA segment load command, the image need
	243	// not be stored to disk nobody needs it, yet!
	244	sg = (struct segment_command *)((int)sg + sg->cmdsize);
	245	bcopy(orig_ds, sg, orig_ds->cmdsize);
	246
	247	sg->vmaddr = (unsigned long) addr;
	248	sg->vmsize = 0x1000; // One page for some reason?
	249	sg->fileoff = offset;
	250	sg->filesize = 0;
	251	sg->maxprot = 0;
	252	sg->initprot = 0;
	253	sg->flags = 0;
	254	se = (struct section *)(sg+1);
	255	for ( j = 0; j < sg->nsects; j++, se++ ) {
	256	se->addr = (unsigned long) addr;
	257	se->size = 0;
	258	se->offset = offset;
	259	se->nreloc = 0;
	260	}
de355530	261	offset = round_page(offset);
0b4e3aa0 A	262
	263
	264	/*
	265	* Set up LC_SYMTAB command
	266	*/
	267	st = (struct symtab_command *)((int)sg + sg->cmdsize);
	268	st->cmd = LC_SYMTAB;
	269	st->cmdsize = sizeof(struct symtab_command);
	270	st->symoff = offset;
	271	st->nsyms = orig_st->nsyms;
	272	st->strsize = orig_st->strsize;
	273	st->stroff = offset + st->nsyms * sizeof(struct nlist);
	274
	275	/*
	276	* Convert the symbol table in place from section references
	277	* to absolute references.
	278	*/
	279	sym = (struct nlist *) orig_le->vmaddr;
	280	for (i = 0; i < st->nsyms; i++, sym++ ) {
	281	if ( (sym->n_type & N_TYPE) == N_SECT) {
	282	sym->n_sect = NO_SECT;
	283	sym->n_type = (sym->n_type & ~N_TYPE) \| N_ABS;
	284	}
	285	}
	286
	287	/*
	288	* Write out the load commands at the beginning of the file.
	289	*/
	290	error = vn_rdwr(UIO_WRITE, vp, (caddr_t) mh, header_size, (off_t) 0,
	291	UIO_SYSSPACE, IO_NODELOCKED\|IO_UNIT, cred, (int *) 0, p);
	292	if (error)
	293	goto out;
	294
	295	/*
	296	* Write out the __TEXT,__const data segment.
	297	*/
	298	error = vn_rdwr(UIO_WRITE, vp, (caddr_t) const_text->addr,
	299	const_text->size, const_text->offset,
	300	UIO_SYSSPACE, IO_NODELOCKED\|IO_UNIT, cred, (int *) 0, p);
	301	if (error)
	302	goto out;
	303
	304	/*
	305	* Write out kernel symbols
	306	*/
	307	offset = st->nsyms * sizeof(struct nlist) + st->strsize; // symtab size
	308	error = vn_rdwr(UIO_WRITE, vp,
	309	(caddr_t) orig_le->vmaddr, offset, st->symoff,
	310	UIO_SYSSPACE, IO_NODELOCKED\|IO_UNIT, cred, (int *) 0, p);
	311	if (error)
	312	goto out;
1c79356b A	313
1c79356b A	314	out:
0b4e3aa0 A	315	if (header)
	316	kmem_free(kernel_map, header, header_size);
	317
	318	if (vp) {
	319	VOP_UNLOCK(vp, 0, p);
	320	error1 = vn_close(vp, FWRITE, cred, p);
	321	if (!error) error = error1;
	322	}
1c79356b	323
0b4e3aa0 A	324	return(error);
0b4e3aa0 A	325	}
1c79356b A	326	/*
	327	*
	328	*/
0b4e3aa0	329	int get_kernel_symfile(struct proc p, char *symfile)
1c79356b	330	{
0b4e3aa0 A	331	if (!kernel_symfile_opened) {
	332	kernel_symfile_opened = 1;
	333	error_code = output_kernel_symbols(p);
1c79356b	334	}
0b4e3aa0 A	335	if (!error_code)
0b4e3aa0 A	336	*symfile = "\\mach.sym";
1c79356b	337
0b4e3aa0 A	338	return error_code;
0b4e3aa0 A	339	}