#include <mach/vm_param.h>
#include <mach/thread_status.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/signalvar.h>
#include <sys/resourcevar.h>
#include <sys/namei.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/acct.h>
#include <sys/file_internal.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/stat.h>
#include <mach-o/loader.h>
#include <mach/vm_region.h>
#include <mach/vm_statistics.h>
#include <vm/vm_kern.h>
#include <vm/vm_protos.h>
#include <vm/vm_map.h>
#include <mach/mach_vm.h>
#include <mach/task.h>
#include <kern/task.h>
typedef struct {
int flavor;
int count;
} mythread_state_flavor_t;
#if defined (__ppc__)
mythread_state_flavor_t thread_flavor_array[]={
{PPC_THREAD_STATE , PPC_THREAD_STATE_COUNT},
{PPC_FLOAT_STATE, PPC_FLOAT_STATE_COUNT},
{PPC_EXCEPTION_STATE, PPC_EXCEPTION_STATE_COUNT},
{PPC_VECTOR_STATE, PPC_VECTOR_STATE_COUNT}
};
int mynum_flavors=4;
#elif defined (__i386__)
mythread_state_flavor_t thread_flavor_array [] = {
{i386_THREAD_STATE, i386_THREAD_STATE_COUNT},
{i386_THREAD_FPSTATE, i386_THREAD_FPSTATE_COUNT},
{i386_THREAD_EXCEPTSTATE, i386_THREAD_EXCEPTSTATE_COUNT},
{i386_THREAD_CTHREADSTATE, i386_THREAD_CTHREADSTATE_COUNT},
{i386_NEW_THREAD_STATE, i386_NEW_THREAD_STATE_COUNT},
{i386_FLOAT_STATE, i386_FLOAT_STATE_COUNT},
{i386_ISA_PORT_MAP_STATE, i386_ISA_PORT_MAP_STATE_COUNT},
{i386_V86_ASSIST_STATE, i386_V86_ASSIST_STATE_COUNT},
{THREAD_SYSCALL_STATE, i386_THREAD_SYSCALL_STATE_COUNT}
};
int mynum_flavors=9;
#else
#error architecture not supported
#endif
typedef struct {
vm_offset_t header;
int hoffset;
mythread_state_flavor_t *flavors;
int tstate_size;
} tir_t;
void collectth_state(thread_t th_act, void *tirp);
kern_return_t thread_getstatus(register thread_t act, int flavor,
thread_state_t tstate, mach_msg_type_number_t *count);
void task_act_iterate_wth_args(task_t, void(*)(thread_t, void *), void *);
__private_extern__ int do_coredump = 1;
__private_extern__ int sugid_coredump = 0;
void
collectth_state(thread_t th_act, void *tirp)
{
vm_offset_t header;
int hoffset, i ;
mythread_state_flavor_t *flavors;
struct thread_command *tc;
tir_t *t = (tir_t *)tirp;
header = t->header;
hoffset = t->hoffset;
flavors = t->flavors;
tc = (struct thread_command *) (header + hoffset);
tc->cmd = LC_THREAD;
tc->cmdsize = sizeof(struct thread_command)
+ t->tstate_size;
hoffset += sizeof(struct thread_command);
for (i = 0; i < mynum_flavors; i++) {
*(mythread_state_flavor_t *)(header+hoffset) =
flavors[i];
hoffset += sizeof(mythread_state_flavor_t);
thread_getstatus(th_act, flavors[i].flavor,
(thread_state_t)(header+hoffset),
&flavors[i].count);
hoffset += flavors[i].count*sizeof(int);
}
t->hoffset = hoffset;
}
#define MAX_TSTATE_FLAVORS 10
int
coredump(struct proc *p)
{
int error=0;
kauth_cred_t cred = kauth_cred_get();
struct vnode_attr va;
struct vfs_context context;
vm_map_t map;
int thread_count, segment_count;
int command_size, header_size, tstate_size;
int hoffset;
off_t foffset;
vm_map_offset_t vmoffset;
vm_offset_t header;
vm_map_size_t vmsize;
vm_prot_t prot;
vm_prot_t maxprot;
vm_inherit_t inherit;
int error1;
task_t task;
char core_name[MAXCOMLEN+6];
char *name;
mythread_state_flavor_t flavors[MAX_TSTATE_FLAVORS];
vm_size_t mapsize;
int i;
int nesting_depth = 0;
kern_return_t kret;
struct vm_region_submap_info_64 vbr;
int vbrcount=0;
tir_t tir1;
struct vnode * vp;
struct mach_header *mh;
struct mach_header_64 *mh64;
int is_64 = 0;
size_t mach_header_sz = sizeof(struct mach_header);
size_t segment_command_sz = sizeof(struct segment_command);
if (do_coredump == 0 ||
( (sugid_coredump == 0) &&
( (cred->cr_svuid != cred->cr_ruid) ||
(cred->cr_svgid != cred->cr_rgid)))) {
return (EFAULT);
}
if (IS_64BIT_PROCESS(p)) {
is_64 = 1;
mach_header_sz = sizeof(struct mach_header_64);
segment_command_sz = sizeof(struct segment_command_64);
}
task = current_task();
map = current_map();
mapsize = get_vmmap_size(map);
if (mapsize >= p->p_rlimit[RLIMIT_CORE].rlim_cur)
return (EFAULT);
(void) task_suspend(task);
name = proc_core_name(p->p_comm, kauth_cred_getuid(cred), p->p_pid);
if (name == NULL) {
sprintf(core_name, "/cores/core.%d", p->p_pid);
name = core_name;
}
context.vc_proc = p;
context.vc_ucred = cred;
if ((error = vnode_open(name, (O_CREAT | FWRITE | O_NOFOLLOW), S_IRUSR, VNODE_LOOKUP_NOFOLLOW, &vp, &context)))
return (error);
VATTR_INIT(&va);
VATTR_WANTED(&va, va_nlink);
if (vp->v_type != VREG ||
vnode_getattr(vp, &va, &context) || va.va_nlink != 1) {
error = EFAULT;
goto out;
}
VATTR_INIT(&va);
VATTR_SET(&va, va_data_size, 0);
vnode_setattr(vp, &va, &context);
p->p_acflag |= ACORE;
thread_count = get_task_numacts(task);
segment_count = get_vmmap_entries(map);
bcopy(thread_flavor_array,flavors,sizeof(thread_flavor_array));
tstate_size = 0;
for (i = 0; i < mynum_flavors; i++)
tstate_size += sizeof(mythread_state_flavor_t) +
(flavors[i].count * sizeof(int));
command_size = segment_count * segment_command_sz +
thread_count*sizeof(struct thread_command) +
tstate_size*thread_count;
header_size = command_size + mach_header_sz;
(void) kmem_alloc(kernel_map,
(vm_offset_t *)&header,
(vm_size_t)header_size);
if (is_64) {
mh64 = (struct mach_header_64 *)header;
mh64->magic = MH_MAGIC_64;
mh64->cputype = cpu_type();
mh64->cpusubtype = cpu_subtype();
mh64->filetype = MH_CORE;
mh64->ncmds = segment_count + thread_count;
mh64->sizeofcmds = command_size;
mh64->reserved = 0;
} else {
mh = (struct mach_header *)header;
mh->magic = MH_MAGIC;
mh->cputype = cpu_type();
mh->cpusubtype = cpu_subtype();
mh->filetype = MH_CORE;
mh->ncmds = segment_count + thread_count;
mh->sizeofcmds = command_size;
}
hoffset = mach_header_sz;
foffset = round_page(header_size);
vmoffset = MACH_VM_MIN_ADDRESS;
while (segment_count > 0) {
struct segment_command *sc;
struct segment_command_64 *sc64;
while (1) {
vbrcount = VM_REGION_SUBMAP_INFO_COUNT_64;
if((kret = mach_vm_region_recurse(map,
&vmoffset, &vmsize, &nesting_depth,
(vm_region_recurse_info_t)&vbr,
&vbrcount)) != KERN_SUCCESS) {
break;
}
if (!(is_64) &&
(vmoffset + vmsize > VM_MAX_ADDRESS)) {
kret = KERN_INVALID_ADDRESS;
break;
}
if(vbr.is_submap) {
nesting_depth++;
continue;
} else {
break;
}
}
if(kret != KERN_SUCCESS)
break;
prot = vbr.protection;
maxprot = vbr.max_protection;
inherit = vbr.inheritance;
if (is_64) {
sc64 = (struct segment_command_64 *)(header + hoffset);
sc64->cmd = LC_SEGMENT_64;
sc64->cmdsize = sizeof(struct segment_command_64);
sc64->segname[0] = 0;
sc64->vmaddr = vmoffset;
sc64->vmsize = vmsize;
sc64->fileoff = foffset;
sc64->filesize = vmsize;
sc64->maxprot = maxprot;
sc64->initprot = prot;
sc64->nsects = 0;
} else {
sc = (struct segment_command *) (header + hoffset);
sc->cmd = LC_SEGMENT;
sc->cmdsize = sizeof(struct segment_command);
sc->segname[0] = 0;
sc->vmaddr = CAST_DOWN(vm_offset_t,vmoffset);
sc->vmsize = CAST_DOWN(vm_size_t,vmsize);
sc->fileoff = CAST_DOWN(uint32_t,foffset);
sc->filesize = CAST_DOWN(uint32_t,vmsize);
sc->maxprot = maxprot;
sc->initprot = prot;
sc->nsects = 0;
}
if ((prot & VM_PROT_READ) == 0) {
mach_vm_protect(map, vmoffset, vmsize, FALSE,
prot|VM_PROT_READ);
}
if ((maxprot & VM_PROT_READ) == VM_PROT_READ
&& vbr.user_tag != VM_MEMORY_IOKIT
&& coredumpok(map,vmoffset)) {
vm_map_size_t tmp_vmsize = vmsize;
off_t xfer_foffset = foffset;
while (tmp_vmsize > 0) {
vm_map_size_t xfer_vmsize = tmp_vmsize;
if (xfer_vmsize > INT_MAX)
xfer_vmsize = INT_MAX;
error = vn_rdwr_64(UIO_WRITE, vp,
vmoffset, xfer_vmsize, xfer_foffset,
(IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32),
IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
tmp_vmsize -= xfer_vmsize;
xfer_foffset += xfer_vmsize;
}
}
hoffset += segment_command_sz;
foffset += vmsize;
vmoffset += vmsize;
segment_count--;
}
if (is_64) {
mh64->ncmds -= segment_count;
} else {
mh->ncmds -= segment_count;
}
tir1.header = header;
tir1.hoffset = hoffset;
tir1.flavors = flavors;
tir1.tstate_size = tstate_size;
task_act_iterate_wth_args(task, collectth_state,&tir1);
error = vn_rdwr(UIO_WRITE, vp, (caddr_t)header, header_size, (off_t)0,
UIO_SYSSPACE32, IO_NODELOCKED|IO_UNIT, cred, (int *) 0, p);
kmem_free(kernel_map, header, header_size);
out:
error1 = vnode_close(vp, FWRITE, &context);
if (error == 0)
error = error1;
return (error);
}