diff options
Diffstat (limited to 'sys/kern/imgact_aout.c')
| -rw-r--r-- | sys/kern/imgact_aout.c | 96 |
1 files changed, 95 insertions, 1 deletions
diff --git a/sys/kern/imgact_aout.c b/sys/kern/imgact_aout.c index 15f613d..7f1d6ec 100644 --- a/sys/kern/imgact_aout.c +++ b/sys/kern/imgact_aout.c @@ -23,19 +23,28 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $Id: imgact_aout.c,v 1.40 1998/02/20 13:11:48 bde Exp $ + * $Id: imgact_aout.c,v 1.41 1998/07/15 05:00:26 bde Exp $ */ #include <sys/param.h> +#include <sys/acct.h> #include <sys/resourcevar.h> #include <sys/exec.h> +#include <sys/fcntl.h> #include <sys/imgact.h> #include <sys/imgact_aout.h> #include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/namei.h> +#include <sys/pioctl.h> #include <sys/proc.h> +#include <sys/signalvar.h> +#include <sys/stat.h> #include <sys/sysent.h> +#include <sys/syscall.h> #include <sys/vnode.h> #include <sys/systm.h> +#include <machine/md_var.h> #include <vm/vm.h> #include <vm/vm_param.h> @@ -44,9 +53,28 @@ #include <vm/pmap.h> #include <vm/vm_map.h> #include <vm/vm_object.h> +#include <sys/user.h> static int exec_aout_imgact __P((struct image_params *imgp)); +struct sysentvec aout_sysvec = { + SYS_MAXSYSCALL, + sysent, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + sendsig, + sigcode, + &szsigcode, + 0, + "FreeBSD a.out", + aout_coredump +}; + static int exec_aout_imgact(imgp) struct image_params *imgp; @@ -204,6 +232,72 @@ exec_aout_imgact(imgp) } /* + * Dump core, into a file named "progname.core", unless the process was + * setuid/setgid. + */ +int +aout_coredump(p) + register struct proc *p; +{ + register struct vnode *vp; + register struct ucred *cred = p->p_cred->pc_ucred; + register struct vmspace *vm = p->p_vmspace; + struct nameidata nd; + struct vattr vattr; + int error, error1; + char *name; /* name of corefile */ + + STOPEVENT(p, S_CORE, 0); + + if (sugid_coredump == 0 && p->p_flag & P_SUGID) + return (EFAULT); + if (ctob(UPAGES + vm->vm_dsize + vm->vm_ssize) >= + p->p_rlimit[RLIMIT_CORE].rlim_cur) + return (EFAULT); + name = expand_name(p->p_comm, p->p_ucred->cr_uid, p->p_pid); + if (name == NULL) + return (EFAULT); /* XXX -- not the best error */ + + NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, name, p); + error = vn_open(&nd, O_CREAT | FWRITE, S_IRUSR | S_IWUSR); + free(name, M_TEMP); + if (error) + return (error); + vp = nd.ni_vp; + + /* Don't dump to non-regular files or files with links. */ + if (vp->v_type != VREG || + VOP_GETATTR(vp, &vattr, cred, p) || vattr.va_nlink != 1) { + error = EFAULT; + 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; + bcopy(p, &p->p_addr->u_kproc.kp_proc, sizeof(struct proc)); + fill_eproc(p, &p->p_addr->u_kproc.kp_eproc); + error = cpu_coredump(p, vp, cred); + if (error == 0) + error = vn_rdwr(UIO_WRITE, vp, vm->vm_daddr, + (int)ctob(vm->vm_dsize), (off_t)ctob(UPAGES), UIO_USERSPACE, + IO_NODELOCKED|IO_UNIT, cred, (int *) NULL, p); + if (error == 0) + error = vn_rdwr(UIO_WRITE, vp, + (caddr_t) trunc_page(USRSTACK - ctob(vm->vm_ssize)), + round_page(ctob(vm->vm_ssize)), + (off_t)ctob(UPAGES) + ctob(vm->vm_dsize), UIO_USERSPACE, + IO_NODELOCKED|IO_UNIT, cred, (int *) NULL, p); +out: + VOP_UNLOCK(vp, 0, p); + error1 = vn_close(vp, FWRITE, cred, p); + if (error == 0) + error = error1; + return (error); +} + +/* * Tell kern_execve.c about it, with a little help from the linker. * Since `const' objects end up in the text segment, TEXT_SET is the * correct directive to use. |
