/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple 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) 1988, 1989, NeXT, Inc.
#include <mach/vm_map.h> /* vm_allocate() */
#include <mach/mach_vm.h> /* mach_vm_allocate() */
#include <mach/vm_statistics.h>
-#include <mach/shared_memory_server.h>
#include <mach/task.h>
#include <mach/thread_act.h>
#include <machine/vmparam.h>
+#include <machine/exec.h>
#include <kern/kern_types.h>
#include <kern/cpu_number.h>
#include <vm/vm_kern.h>
#include <vm/vm_pager.h>
#include <vm/vnode_pager.h>
-#include <vm/vm_shared_memory_server.h>
#include <vm/vm_protos.h>
/*
* XXX vm/pmap.h should not treat these prototypes as MACH_KERNEL_PRIVATE
* when KERNEL is defined.
*/
-extern pmap_t pmap_create(vm_map_size_t size);
+extern pmap_t pmap_create(vm_map_size_t size, boolean_t is_64bit);
extern void pmap_switch(pmap_t);
-extern void pmap_map_sharedpage(task_t task, pmap_t pmap);
/*
* XXX kern/thread.h should not treat these prototypes as MACH_KERNEL_PRIVATE
/* XXX should have prototypes in a shared header file */
-extern int grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype);
extern int get_map_nentries(vm_map_t);
extern kern_return_t thread_userstack(thread_t, int, thread_state_t,
unsigned int, mach_vm_offset_t *, int *);
extern kern_return_t thread_entrypoint(thread_t, int, thread_state_t,
unsigned int, mach_vm_offset_t *);
+extern kern_return_t memory_object_signed(memory_object_control_t control,
+ boolean_t is_signed);
/* An empty load_result_t */
static load_result_t load_result_null = {
- MACH_VM_MIN_ADDRESS,
- MACH_VM_MIN_ADDRESS,
- MACH_VM_MIN_ADDRESS,
- 0,
- 0,
- 0,
- 0
+ .mach_header = MACH_VM_MIN_ADDRESS,
+ .entry_point = MACH_VM_MIN_ADDRESS,
+ .user_stack = MACH_VM_MIN_ADDRESS,
+ .thread_count = 0,
+ .unixproc = 0,
+ .dynlinker = 0,
+ .customstack = 0,
+ .csflags = 0
};
/*
parse_machfile(
struct vnode *vp,
vm_map_t map,
- thread_t thr_act,
+ thread_t thread,
struct mach_header *header,
off_t file_offset,
off_t macho_size,
- boolean_t shared_regions,
- boolean_t clean_regions,
int depth,
load_result_t *result
);
load_result_t *result
);
+int load_code_signature(
+ struct linkedit_data_command *lcp,
+ struct vnode *vp,
+ off_t macho_offset,
+ off_t macho_size,
+ cpu_type_t cputype,
+ load_result_t *result);
+
static load_return_t
load_unixthread(
struct thread_command *tcp,
- thread_t thr_act,
+ thread_t thread,
load_result_t *result
);
static load_return_t
load_thread(
struct thread_command *tcp,
- thread_t thr_act,
+ thread_t thread,
load_result_t *result
);
thread_t thread,
unsigned long *ts,
unsigned long total_size,
- mach_vm_offset_t *user_stack,
+ user_addr_t *user_stack,
int *customstack
);
struct dylinker_command *lcp,
integer_t archbits,
vm_map_t map,
- thread_t thr_act,
+ thread_t thread,
int depth,
load_result_t *result,
- boolean_t clean_regions
+ boolean_t is_64bit
);
static load_return_t
load_machfile(
struct image_params *imgp,
struct mach_header *header,
- thread_t thr_act,
+ thread_t thread,
vm_map_t new_map,
- boolean_t clean_regions,
load_result_t *result
)
{
if (create_map) {
old_map = current_map();
-#ifdef i386
- pmap = get_task_pmap(current_task());
- pmap_reference(pmap);
-#else
- pmap = pmap_create((vm_map_size_t) 0);
-#endif
+ pmap = pmap_create((vm_map_size_t) 0, (imgp->ip_flags & IMGPF_IS_64BIT));
map = vm_map_create(pmap,
- get_map_min(old_map),
- get_map_max(old_map),
- TRUE); /**** FIXME ****/
+ 0,
+ vm_compute_max_offset((imgp->ip_flags & IMGPF_IS_64BIT)),
+ TRUE);
} else
map = new_map;
+
+ if ( (header->flags & MH_ALLOW_STACK_EXECUTION) )
+ vm_map_disable_NX(map);
if (!result)
result = &myresult;
*result = load_result_null;
- lret = parse_machfile(vp, map, thr_act, header, file_offset, macho_size,
- ((imgp->ip_flags & IMGPF_IS_64BIT) == 0), /* shared regions? */
- clean_regions, 0, result);
+ lret = parse_machfile(vp, map, thread, header, file_offset, macho_size,
+ 0, result);
if (lret != LOAD_SUCCESS) {
if (create_map) {
return(lret);
}
+ /*
+ * For 64-bit users, check for presence of a 4GB page zero
+ * which will enable the kernel to share the user's address space
+ * and hence avoid TLB flushes on kernel entry/exit
+ */
+ if ((imgp->ip_flags & IMGPF_IS_64BIT) &&
+ vm_map_has_4GB_pagezero(map))
+ vm_map_set_4GB_pagezero(map);
+
/*
* Commit to new map. First make sure that the current
* users of the task get done with it, and that we clean
* That lets us get off the pmap associated with it, and
* then we can release it.
*/
+
if (create_map) {
task_halt(current_task());
old_map = swap_task_map(current_task(), map);
-#ifndef i386
+ vm_map_clear_4GB_pagezero(old_map);
pmap_switch(pmap); /* Make sure we are using the new pmap */
-#endif
vm_map_deallocate(old_map);
}
return(LOAD_SUCCESS);
}
-int dylink_test = 1;
-
/*
* The file size of a mach-o file is limited to 32 bits; this is because
* this is the limit on the kalloc() of enough bytes for a mach_header and
parse_machfile(
struct vnode *vp,
vm_map_t map,
- thread_t thr_act,
+ thread_t thread,
struct mach_header *header,
off_t file_offset,
off_t macho_size,
- boolean_t shared_regions,
- boolean_t clean_regions,
int depth,
load_result_t *result
)
size_t offset;
size_t oldoffset; /* for overflow check */
int pass;
- struct proc *p = current_proc(); /* XXXX */
+ proc_t p = current_proc(); /* XXXX */
int error;
int resid=0;
task_t task;
size_t mach_header_sz = sizeof(struct mach_header);
boolean_t abi64;
+ boolean_t got_code_signatures = FALSE;
if (header->magic == MH_MAGIC_64 ||
header->magic == MH_CIGAM_64) {
/*
* Break infinite recursion
*/
- if (depth > 6)
+ if (depth > 6) {
return(LOAD_FAILURE);
+ }
- task = (task_t)get_threadtask(thr_act);
+ task = (task_t)get_threadtask(thread);
depth++;
* Check to see if right machine type.
*/
if (((cpu_type_t)(header->cputype & ~CPU_ARCH_MASK) != cpu_type()) ||
- !grade_binary(header->cputype, header->cpusubtype))
+ !grade_binary(header->cputype,
+ header->cpusubtype & ~CPU_SUBTYPE_MASK))
return(LOAD_BADARCH);
abi64 = ((header->cputype & CPU_ARCH_ABI64) == CPU_ARCH_ABI64);
case MH_OBJECT:
case MH_EXECUTE:
case MH_PRELOAD:
- if (depth != 1)
+ if (depth != 1) {
return (LOAD_FAILURE);
+ }
break;
case MH_FVMLIB:
case MH_DYLIB:
- if (depth == 1)
+ if (depth == 1) {
return (LOAD_FAILURE);
+ }
break;
case MH_DYLINKER:
- if (depth != 2)
+ if (depth != 2) {
return (LOAD_FAILURE);
+ }
break;
default:
/*
* Get the pager for the file.
*/
- UBCINFOCHECK("parse_machfile", vp);
pager = (void *) ubc_getpager(vp);
/*
if (pass != 2)
break;
ret = load_thread((struct thread_command *)lcp,
- thr_act,
+ thread,
result);
break;
case LC_UNIXTHREAD:
break;
ret = load_unixthread(
(struct thread_command *) lcp,
- thr_act,
+ thread,
result);
break;
case LC_LOAD_DYLINKER:
ret = LOAD_FAILURE;
}
break;
+ case LC_CODE_SIGNATURE:
+ /* CODE SIGNING */
+ if (pass != 2)
+ break;
+ /* pager -> uip ->
+ load signatures & store in uip
+ set VM object "signed_pages"
+ */
+ ret = load_code_signature(
+ (struct linkedit_data_command *) lcp,
+ vp,
+ file_offset,
+ macho_size,
+ header->cputype,
+ (depth == 1) ? result : NULL);
+ if (ret != LOAD_SUCCESS) {
+ printf("proc %d: load code signature error %d "
+ "for file \"%s\"\n",
+ p->p_pid, ret, vp->v_name);
+ ret = LOAD_SUCCESS; /* ignore error */
+ } else {
+ got_code_signatures = TRUE;
+ }
+ break;
default:
/* Other commands are ignored by the kernel */
ret = LOAD_SUCCESS;
break;
}
if (ret == LOAD_SUCCESS) {
+ if (! got_code_signatures) {
+ struct cs_blob *blob;
+ /* no embedded signatures: look for detached ones */
+ blob = ubc_cs_blob_get(vp, -1, file_offset);
+ if (blob != NULL) {
+ /* get flags to be applied to the process */
+ result->csflags |= blob->csb_flags;
+ }
+ }
- if (shared_regions) {
- vm_offset_t vmaddr;
- shared_region_mapping_t shared_region;
- struct shared_region_task_mappings map_info;
- shared_region_mapping_t next;
-
-RedoLookup:
- vm_get_shared_region(task, &shared_region);
- map_info.self = (vm_offset_t)shared_region;
- shared_region_mapping_info(shared_region,
- &(map_info.text_region),
- &(map_info.text_size),
- &(map_info.data_region),
- &(map_info.data_size),
- &(map_info.region_mappings),
- &(map_info.client_base),
- &(map_info.alternate_base),
- &(map_info.alternate_next),
- &(map_info.fs_base),
- &(map_info.system),
- &(map_info.flags), &next);
-
- if((map_info.flags & SHARED_REGION_FULL) ||
- (map_info.flags & SHARED_REGION_STALE)) {
- shared_region_mapping_t system_region;
- system_region = lookup_default_shared_region(
- map_info.fs_base, map_info.system);
- if((map_info.self != (vm_offset_t)system_region) &&
- (map_info.flags & SHARED_REGION_SYSTEM)) {
- if(system_region == NULL) {
- shared_file_boot_time_init(
- map_info.fs_base, map_info.system);
- } else {
- vm_set_shared_region(task, system_region);
- }
- shared_region_mapping_dealloc(
- (shared_region_mapping_t)map_info.self);
- goto RedoLookup;
- } else if (map_info.flags & SHARED_REGION_SYSTEM) {
- shared_region_mapping_dealloc(system_region);
- shared_file_boot_time_init(
- map_info.fs_base, map_info.system);
- shared_region_mapping_dealloc(
- (shared_region_mapping_t)map_info.self);
- } else {
- shared_region_mapping_dealloc(system_region);
- }
- }
-
- if (dylink_test) {
- p->p_flag |= P_NOSHLIB; /* no shlibs in use */
- vmaddr = map_info.client_base;
- if(clean_regions) {
- vm_map(map, &vmaddr, map_info.text_size,
- 0, SHARED_LIB_ALIAS|VM_FLAGS_FIXED,
- map_info.text_region, 0, FALSE,
- VM_PROT_READ, VM_PROT_READ, VM_INHERIT_SHARE);
- } else {
- vm_map(map, &vmaddr, map_info.text_size, 0,
- (VM_MEMORY_SHARED_PMAP << 24)
- | SHARED_LIB_ALIAS | VM_FLAGS_FIXED,
- map_info.text_region, 0, FALSE,
- VM_PROT_READ, VM_PROT_READ, VM_INHERIT_SHARE);
- }
- vmaddr = map_info.client_base + map_info.text_size;
- vm_map(map, &vmaddr, map_info.data_size,
- 0, SHARED_LIB_ALIAS | VM_FLAGS_FIXED,
- map_info.data_region, 0, TRUE,
- VM_PROT_READ, VM_PROT_READ, VM_INHERIT_SHARE);
-
- while (next) {
- /* this should be fleshed out for the general case */
- /* but this is not necessary for now. Indeed we */
- /* are handling the com page inside of the */
- /* shared_region mapping create calls for now for */
- /* simplicities sake. If more general support is */
- /* needed the code to manipulate the shared range */
- /* chain can be pulled out and moved to the callers*/
- shared_region_mapping_info(next,
- &(map_info.text_region),
- &(map_info.text_size),
- &(map_info.data_region),
- &(map_info.data_size),
- &(map_info.region_mappings),
- &(map_info.client_base),
- &(map_info.alternate_base),
- &(map_info.alternate_next),
- &(map_info.fs_base),
- &(map_info.system),
- &(map_info.flags), &next);
-
- vmaddr = map_info.client_base;
- vm_map(map, &vmaddr, map_info.text_size,
- 0, SHARED_LIB_ALIAS | VM_FLAGS_FIXED,
- map_info.text_region, 0, FALSE,
- VM_PROT_READ, VM_PROT_READ, VM_INHERIT_SHARE);
- }
- }
- }
if (dlp != 0)
- ret = load_dylinker(dlp, dlarchbits, map, thr_act, depth, result, clean_regions);
+ ret = load_dylinker(dlp, dlarchbits, map, thread, depth, result, abi64);
if(depth == 1) {
- if (result->thread_count == 0)
+ if (result->thread_count == 0) {
ret = LOAD_FAILURE;
+ } else if ( abi64 ) {
#ifdef __ppc__
- else if ( abi64 ) {
/* Map in 64-bit commpage */
/* LP64todo - make this clean */
+ /*
+ * PPC51: ppc64 is limited to 51-bit addresses.
+ * Memory above that limit is handled specially
+ * at the pmap level.
+ */
pmap_map_sharedpage(current_task(), get_map_pmap(map));
- vm_map_commpage64(map);
+#endif /* __ppc__ */
}
-#endif
}
}
kfree(kl_addr, kl_size);
if (ret == LOAD_SUCCESS)
- (void)ubc_map(vp, PROT_EXEC);
+ (void)ubc_map(vp, PROT_READ | PROT_EXEC);
return(ret);
}
+#ifdef __i386__
+
+#define APPLE_UNPROTECTED_HEADER_SIZE (3 * PAGE_SIZE_64)
+
+static load_return_t
+unprotect_segment_64(
+ uint64_t file_off,
+ uint64_t file_size,
+ vm_map_t map,
+ vm_map_offset_t map_addr,
+ vm_map_size_t map_size)
+{
+ kern_return_t kr;
+
+ /*
+ * The first APPLE_UNPROTECTED_HEADER_SIZE bytes (from offset 0 of
+ * this part of a Universal binary) are not protected...
+ * The rest needs to be "transformed".
+ */
+ if (file_off <= APPLE_UNPROTECTED_HEADER_SIZE &&
+ file_off + file_size <= APPLE_UNPROTECTED_HEADER_SIZE) {
+ /* it's all unprotected, nothing to do... */
+ kr = KERN_SUCCESS;
+ } else {
+ if (file_off <= APPLE_UNPROTECTED_HEADER_SIZE) {
+ /*
+ * We start mapping in the unprotected area.
+ * Skip the unprotected part...
+ */
+ vm_map_offset_t delta;
+
+ delta = APPLE_UNPROTECTED_HEADER_SIZE;
+ delta -= file_off;
+ map_addr += delta;
+ map_size -= delta;
+ }
+ /* ... transform the rest of the mapping. */
+ kr = vm_map_apple_protected(map,
+ map_addr,
+ map_addr + map_size);
+ }
+
+ if (kr != KERN_SUCCESS) {
+ return LOAD_FAILURE;
+ }
+ return LOAD_SUCCESS;
+}
+#else /* __i386__ */
+#define unprotect_segment_64(file_off, file_size, map, map_addr, map_size) \
+ LOAD_SUCCESS
+#endif /* __i386__ */
+
static
load_return_t
load_segment(
*/
if (scp->fileoff + scp->filesize > macho_size)
return (LOAD_BADMACHO);
+ /*
+ * Make sure the segment is page-aligned in the file.
+ */
+ if ((scp->fileoff & PAGE_MASK) != 0)
+ return LOAD_BADMACHO;
seg_size = round_page(scp->vmsize);
if (seg_size == 0)
map_size = round_page(scp->filesize);
map_addr = trunc_page(scp->vmaddr);
+#if 0 /* XXX (4596982) this interferes with Rosetta */
+ if (map_addr == 0 &&
+ map_size == 0 &&
+ seg_size != 0 &&
+ (scp->initprot & VM_PROT_ALL) == VM_PROT_NONE &&
+ (scp->maxprot & VM_PROT_ALL) == VM_PROT_NONE) {
+ /*
+ * This is a "page zero" segment: it starts at address 0,
+ * is not mapped from the binary file and is not accessible.
+ * User-space should never be able to access that memory, so
+ * make it completely off limits by raising the VM map's
+ * minimum offset.
+ */
+ ret = vm_map_raise_min_offset(map, (vm_map_offset_t) seg_size);
+ if (ret != KERN_SUCCESS) {
+ return LOAD_FAILURE;
+ }
+ return LOAD_SUCCESS;
+ }
+#endif
+
map_offset = pager_offset + scp->fileoff;
if (map_size > 0) {
if (delta_size > 0) {
vm_offset_t tmp = map_addr + map_size;
- ret = vm_allocate(map, &tmp, delta_size, VM_FLAGS_FIXED);
+ ret = vm_map(map, &tmp, delta_size, 0, VM_FLAGS_FIXED,
+ NULL, 0, FALSE,
+ scp->initprot, scp->maxprot,
+ VM_INHERIT_DEFAULT);
if (ret != KERN_SUCCESS)
return(LOAD_NOSPACE);
}
- /*
- * Set protection values. (Note: ignore errors!)
- */
-
- if (scp->maxprot != VM_PROT_DEFAULT) {
- (void) vm_protect(map,
- map_addr, seg_size,
- TRUE, scp->maxprot);
- }
- if (scp->initprot != VM_PROT_DEFAULT) {
- (void) vm_protect(map,
- map_addr, seg_size,
- FALSE, scp->initprot);
- }
if ( (scp->fileoff == 0) && (scp->filesize != 0) )
result->mach_header = map_addr;
- return(LOAD_SUCCESS);
+
+ if (scp->flags & SG_PROTECTED_VERSION_1) {
+ ret = unprotect_segment_64((uint64_t) scp->fileoff,
+ (uint64_t) scp->filesize,
+ map,
+ (vm_map_offset_t) map_addr,
+ (vm_map_size_t) map_size);
+ } else {
+ ret = LOAD_SUCCESS;
+ }
+
+ return ret;
}
static
*/
if (scp64->fileoff + scp64->filesize > (uint64_t)macho_size)
return (LOAD_BADMACHO);
+ /*
+ * Make sure the segment is page-aligned in the file.
+ */
+ if ((scp64->fileoff & PAGE_MASK_64) != 0)
+ return LOAD_BADMACHO;
seg_size = round_page_64(scp64->vmsize);
if (seg_size == 0)
map_size = round_page_64(scp64->filesize); /* limited to 32 bits */
map_addr = round_page_64(scp64->vmaddr);
+ if (map_addr == 0 &&
+ map_size == 0 &&
+ seg_size != 0 &&
+ (scp64->initprot & VM_PROT_ALL) == VM_PROT_NONE &&
+ (scp64->maxprot & VM_PROT_ALL) == VM_PROT_NONE) {
+ /*
+ * This is a "page zero" segment: it starts at address 0,
+ * is not mapped from the binary file and is not accessible.
+ * User-space should never be able to access that memory, so
+ * make it completely off limits by raising the VM map's
+ * minimum offset.
+ */
+ ret = vm_map_raise_min_offset(map, seg_size);
+ if (ret != KERN_SUCCESS) {
+ return LOAD_FAILURE;
+ }
+ return LOAD_SUCCESS;
+ }
+
map_offset = pager_offset + scp64->fileoff; /* limited to 32 bits */
if (map_size > 0) {
delta_size)) {
(void) vm_deallocate(
kernel_map, tmp, delta_size);
- return (LOAD_FAILURE);
+ return (LOAD_FAILURE);
}
(void) vm_deallocate(kernel_map, tmp, delta_size);
if (delta_size > 0) {
mach_vm_offset_t tmp = map_addr + map_size;
- ret = mach_vm_allocate(map, &tmp, delta_size, VM_FLAGS_FIXED);
+ ret = mach_vm_map(map, &tmp, delta_size, 0, VM_FLAGS_FIXED,
+ NULL, 0, FALSE,
+ scp64->initprot, scp64->maxprot,
+ VM_INHERIT_DEFAULT);
if (ret != KERN_SUCCESS)
return(LOAD_NOSPACE);
}
- /*
- * Set protection values. (Note: ignore errors!)
- */
-
- if (scp64->maxprot != VM_PROT_DEFAULT) {
- (void) mach_vm_protect(map,
- map_addr, seg_size,
- TRUE, scp64->maxprot);
- }
- if (scp64->initprot != VM_PROT_DEFAULT) {
- (void) mach_vm_protect(map,
- map_addr, seg_size,
- FALSE, scp64->initprot);
- }
if ( (scp64->fileoff == 0) && (scp64->filesize != 0) )
result->mach_header = map_addr;
- return(LOAD_SUCCESS);
+
+ if (scp64->flags & SG_PROTECTED_VERSION_1) {
+ ret = unprotect_segment_64(scp64->fileoff,
+ scp64->filesize,
+ map,
+ map_addr,
+ map_size);
+ } else {
+ ret = LOAD_SUCCESS;
+ }
+
+ return ret;
}
static
task = get_threadtask(thread);
- /* if count is 0; same as thr_act */
+ /* if count is 0; same as thread */
if (result->thread_count != 0) {
kret = thread_create(task, &thread);
if (kret != KERN_SUCCESS)
load_return_t ret;
int customstack =0;
- if (result->thread_count != 0)
+ if (result->thread_count != 0) {
+printf("load_unixthread: already have a thread!");
return (LOAD_FAILURE);
+ }
ret = load_threadstack(thread,
(unsigned long *)(((vm_offset_t)tcp) +
unsigned long thread_size;
ret = thread_state_initialize( thread );
- if (ret != KERN_SUCCESS)
+ if (ret != KERN_SUCCESS) {
return(LOAD_FAILURE);
+ }
/*
* Set the new thread state; iterate through the state flavors in
* based on the value of flavor.
*/
ret = thread_setstatus(thread, flavor, (thread_state_t)ts, size);
- if (ret != KERN_SUCCESS)
+ if (ret != KERN_SUCCESS) {
return(LOAD_FAILURE);
+ }
ts += size; /* ts is a (unsigned long *) */
}
return(LOAD_SUCCESS);
* the value of flavor.
*/
ret = thread_userstack(thread, flavor, (thread_state_t)ts, size, user_stack, customstack);
- if (ret != KERN_SUCCESS)
+ if (ret != KERN_SUCCESS) {
return(LOAD_FAILURE);
+ }
ts += size; /* ts is a (unsigned long *) */
}
return(LOAD_SUCCESS);
* the value of flavor.
*/
ret = thread_entrypoint(thread, flavor, (thread_state_t)ts, size, entry_point);
- if (ret != KERN_SUCCESS)
+ if (ret != KERN_SUCCESS) {
return(LOAD_FAILURE);
+ }
ts += size; /* ts is a (unsigned long *) */
}
return(LOAD_SUCCESS);
struct dylinker_command *lcp,
integer_t archbits,
vm_map_t map,
- thread_t thr_act,
+ thread_t thread,
int depth,
load_result_t *result,
- boolean_t clean_regions
+ boolean_t is_64bit
)
{
char *name;
char *p;
- struct vnode *vp;
+ struct vnode *vp = NULLVP; /* set by get_macho_vnode() */
struct mach_header header;
- off_t file_offset;
- off_t macho_size;
+ off_t file_offset = 0; /* set by get_macho_vnode() */
+ off_t macho_size = 0; /* set by get_macho_vnode() */
vm_map_t copy_map;
load_result_t myresult;
kern_return_t ret;
if (ret)
return (ret);
- /*
- * Load the Mach-O.
- * Use a temporary map to do the work.
- */
- copy_map = vm_map_create(pmap_create(vm_map_round_page(macho_size)),
- get_map_min(map), get_map_max(map), TRUE);
- if (VM_MAP_NULL == copy_map) {
- ret = LOAD_RESOURCE;
- goto out;
- }
-
myresult = load_result_null;
- ret = parse_machfile(vp, copy_map, thr_act, &header,
- file_offset, macho_size,
- FALSE, clean_regions, depth, &myresult);
-
- if (ret)
- goto out;
+ /*
+ * First try to map dyld in directly. This should work most of
+ * the time since there shouldn't normally be something already
+ * mapped to its address.
+ */
- if (get_map_nentries(copy_map) > 0) {
+ ret = parse_machfile(vp, map, thread, &header, file_offset, macho_size,
+ depth, &myresult);
- dyl_start = mach_get_vm_start(copy_map);
- dyl_length = mach_get_vm_end(copy_map) - dyl_start;
+ /*
+ * If it turned out something was in the way, then we'll take
+ * take this longer path to map dyld into a temporary map and
+ * copy it into destination map at a different address.
+ */
- map_addr = dyl_start;
- ret = mach_vm_allocate(map, &map_addr, dyl_length, VM_FLAGS_FIXED);
- if (ret != KERN_SUCCESS) {
- ret = mach_vm_allocate(map, &map_addr, dyl_length, VM_FLAGS_ANYWHERE);
- }
+ if (ret == LOAD_NOSPACE) {
- if (ret != KERN_SUCCESS) {
- ret = LOAD_NOSPACE;
+ /*
+ * Load the Mach-O.
+ * Use a temporary map to do the work.
+ */
+ copy_map = vm_map_create(pmap_create(vm_map_round_page(macho_size),
+ is_64bit),
+ get_map_min(map), get_map_max(map), TRUE);
+ if (VM_MAP_NULL == copy_map) {
+ ret = LOAD_RESOURCE;
goto out;
-
}
- ret = vm_map_copyin(copy_map,
- (vm_map_address_t)dyl_start,
- (vm_map_size_t)dyl_length,
- TRUE, &tmp);
- if (ret != KERN_SUCCESS) {
- (void) vm_map_remove(map,
- vm_map_trunc_page(map_addr),
- vm_map_round_page(map_addr + dyl_length),
- VM_MAP_NO_FLAGS);
+
+ myresult = load_result_null;
+
+ ret = parse_machfile(vp, copy_map, thread, &header,
+ file_offset, macho_size,
+ depth, &myresult);
+
+ if (ret) {
+ vm_map_deallocate(copy_map);
goto out;
}
+
+ if (get_map_nentries(copy_map) > 0) {
+
+ dyl_start = mach_get_vm_start(copy_map);
+ dyl_length = mach_get_vm_end(copy_map) - dyl_start;
+
+ map_addr = dyl_start;
+ ret = mach_vm_allocate(map, &map_addr, dyl_length, VM_FLAGS_ANYWHERE);
+
+ if (ret != KERN_SUCCESS) {
+ vm_map_deallocate(copy_map);
+ ret = LOAD_NOSPACE;
+ goto out;
+
+ }
- ret = vm_map_copy_overwrite(map,
- (vm_map_address_t)map_addr,
- tmp, FALSE);
- if (ret != KERN_SUCCESS) {
- vm_map_copy_discard(tmp);
- (void) vm_map_remove(map,
- vm_map_trunc_page(map_addr),
- vm_map_round_page(map_addr + dyl_length),
- VM_MAP_NO_FLAGS);
- goto out;
+ ret = vm_map_copyin(copy_map,
+ (vm_map_address_t)dyl_start,
+ (vm_map_size_t)dyl_length,
+ TRUE, &tmp);
+ if (ret != KERN_SUCCESS) {
+ (void) vm_map_remove(map,
+ vm_map_trunc_page(map_addr),
+ vm_map_round_page(map_addr + dyl_length),
+ VM_MAP_NO_FLAGS);
+ vm_map_deallocate(copy_map);
+ goto out;
+ }
+
+ ret = vm_map_copy_overwrite(map,
+ (vm_map_address_t)map_addr,
+ tmp, FALSE);
+ if (ret != KERN_SUCCESS) {
+ vm_map_copy_discard(tmp);
+ (void) vm_map_remove(map,
+ vm_map_trunc_page(map_addr),
+ vm_map_round_page(map_addr + dyl_length),
+ VM_MAP_NO_FLAGS);
+ vm_map_deallocate(copy_map);
+ goto out;
+ }
+
+ if (map_addr != dyl_start)
+ myresult.entry_point += (map_addr - dyl_start);
+ } else {
+ ret = LOAD_FAILURE;
}
- if (map_addr != dyl_start)
- myresult.entry_point += (map_addr - dyl_start);
- } else
- ret = LOAD_FAILURE;
+ vm_map_deallocate(copy_map);
+ }
if (ret == LOAD_SUCCESS) {
result->dynlinker = TRUE;
result->entry_point = myresult.entry_point;
- (void)ubc_map(vp, PROT_EXEC);
+ (void)ubc_map(vp, PROT_READ | PROT_EXEC);
}
out:
- vm_map_deallocate(copy_map);
-
vnode_put(vp);
return (ret);
}
+int
+load_code_signature(
+ struct linkedit_data_command *lcp,
+ struct vnode *vp,
+ off_t macho_offset,
+ off_t macho_size,
+ cpu_type_t cputype,
+ load_result_t *result)
+{
+ int ret;
+ kern_return_t kr;
+ vm_offset_t addr;
+ int resid;
+ struct cs_blob *blob;
+ int error;
+
+ addr = 0;
+ blob = NULL;
+
+ if (lcp->cmdsize != sizeof (struct linkedit_data_command) ||
+ lcp->dataoff + lcp->datasize > macho_size) {
+ ret = LOAD_BADMACHO;
+ goto out;
+ }
+
+ blob = ubc_cs_blob_get(vp, cputype, -1);
+ if (blob != NULL) {
+ /* we already have a blob for this vnode and cputype */
+ if (blob->csb_cpu_type == cputype &&
+ blob->csb_base_offset == macho_offset &&
+ blob->csb_mem_size == lcp->datasize) {
+ /* it matches the blob we want here: we're done */
+ ret = LOAD_SUCCESS;
+ } else {
+ /* the blob has changed for this vnode: fail ! */
+ ret = LOAD_BADMACHO;
+ }
+ goto out;
+ }
+
+ kr = kmem_alloc(kernel_map, &addr, round_page(lcp->datasize));
+ if (kr != KERN_SUCCESS) {
+ ret = LOAD_NOSPACE;
+ goto out;
+ }
+
+ resid = 0;
+ error = vn_rdwr(UIO_READ,
+ vp,
+ (caddr_t) addr,
+ lcp->datasize,
+ macho_offset + lcp->dataoff,
+ UIO_SYSSPACE32,
+ 0,
+ kauth_cred_get(),
+ &resid,
+ current_proc());
+ if (error || resid != 0) {
+ ret = LOAD_IOERROR;
+ goto out;
+ }
+
+ if (ubc_cs_blob_add(vp,
+ cputype,
+ macho_offset,
+ addr,
+ lcp->datasize)) {
+ ret = LOAD_FAILURE;
+ goto out;
+ } else {
+ /* ubc_cs_blob_add() has consumed "addr" */
+ addr = 0;
+ }
+
+ blob = ubc_cs_blob_get(vp, cputype, -1);
+
+ ret = LOAD_SUCCESS;
+out:
+ if (result && ret == LOAD_SUCCESS) {
+ result->csflags |= blob->csb_flags;
+ }
+ if (addr != 0) {
+ kmem_free(kernel_map, addr, round_page(lcp->datasize));
+ addr = 0;
+ }
+
+ return ret;
+}
+
/*
* This routine exists to support the load_dylinker().
*
)
{
struct vnode *vp;
- struct vfs_context context;
+ vfs_context_t ctx = vfs_context_current();
+ proc_t p = vfs_context_proc(ctx);
+ kauth_cred_t kerncred;
struct nameidata nid, *ndp;
- struct proc *p = current_proc(); /* XXXX */
boolean_t is_fat;
struct fat_arch fat_arch;
int error = LOAD_SUCCESS;
char pad[512];
} header;
off_t fsize = (off_t)0;
- struct ucred *cred = kauth_cred_get();
int err2;
- context.vc_proc = p;
- context.vc_ucred = cred;
+ /*
+ * Capture the kernel credential for use in the actual read of the
+ * file, since the user doing the execution may have execute rights
+ * but not read rights, but to exec something, we have to either map
+ * or read it into the new process address space, which requires
+ * read rights. This is to deal with lack of common credential
+ * serialization code which would treat NOCRED as "serialize 'root'".
+ */
+ kerncred = vfs_context_ucred(vfs_context_kernel());
ndp = &nid;
/* init the namei data to point the file user's program name */
- NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE32, CAST_USER_ADDR_T(path), &context);
+ NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE32, CAST_USER_ADDR_T(path), ctx);
if ((error = namei(ndp)) != 0) {
- if (error == ENOENT)
+ if (error == ENOENT) {
error = LOAD_ENOENT;
- else
+ } else {
error = LOAD_FAILURE;
+ }
return(error);
}
nameidone(ndp);
}
/* get size */
- if ((error = vnode_size(vp, &fsize, &context)) != 0) {
+ if ((error = vnode_size(vp, &fsize, ctx)) != 0) {
error = LOAD_FAILURE;
goto bad1;
}
}
/* check access */
- if ((error = vnode_authorize(vp, NULL, KAUTH_VNODE_EXECUTE, &context)) != 0) {
+ if ((error = vnode_authorize(vp, NULL, KAUTH_VNODE_EXECUTE, ctx)) != 0) {
error = LOAD_PROTECT;
goto bad1;
}
/* try to open it */
- if ((error = VNOP_OPEN(vp, FREAD, &context)) != 0) {
+ if ((error = VNOP_OPEN(vp, FREAD, ctx)) != 0) {
error = LOAD_PROTECT;
goto bad1;
}
if ((error = vn_rdwr(UIO_READ, vp, (caddr_t)&header, sizeof(header), 0,
- UIO_SYSSPACE32, IO_NODELOCKED, cred, &resid, p)) != 0) {
+ UIO_SYSSPACE32, IO_NODELOCKED, kerncred, &resid, p)) != 0) {
error = LOAD_IOERROR;
goto bad2;
}
/* Read the Mach-O header out of it */
error = vn_rdwr(UIO_READ, vp, (caddr_t)&header.mach_header,
sizeof(header.mach_header), fat_arch.offset,
- UIO_SYSSPACE32, IO_NODELOCKED, cred, &resid, p);
+ UIO_SYSSPACE32, IO_NODELOCKED, kerncred, &resid, p);
if (error) {
error = LOAD_IOERROR;
goto bad2;
}
*file_offset = fat_arch.offset;
- *macho_size = fsize = fat_arch.size;
+ *macho_size = fat_arch.size;
} else {
/*
* Force get_macho_vnode() to fail if the architecture bits
return (error);
bad2:
- err2 = VNOP_CLOSE(vp, FREAD, &context);
+ err2 = VNOP_CLOSE(vp, FREAD, ctx);
vnode_put(vp);
return (error);
projects / apple / xnu.git / blobdiff