/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
*
* 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>
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;
// 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)
+ if (rc_mh == 0 && orig_mh)
IODTFreeLoaderInfo("Kernel-__HEADER",
- (void *)orig_mh, round_page(orig_mhsize));
+ (void *)orig_mh, round_page_32(orig_mhsize));
rc_sc = IODTGetLoaderInfo("Kernel-__SYMTAB",
(void **) &orig_st, &orig_st_size);
- if (rc_sc && orig_st)
+ if (rc_sc == 0 && orig_st)
IODTFreeLoaderInfo("Kernel-__SYMTAB",
- (void *)orig_st, round_page(orig_st_size));
+ (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)
const_text = se;
}
}
- offset = round_page((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!
* 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;
}
+
projects / apple / xnu.git / blobdiff