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Give this a self contained a.out coredump routine.

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XXX freebsd-aout coredumps for a linux-aout binary is a bit pointless.
This commit is contained in:
peter 2002-09-07 01:29:21 +00:00
parent e3b1e6d8fa
commit ba1db69f48
1 changed files with 60 additions and 1 deletions
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61
sys/i386/linux/linux_sysvec.c
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@ -30,6 +30,7 @@
/* XXX we use functions that might not exist. */
#include "opt_compat.h"
#include "opt_kstack_pages.h"
#ifndef COMPAT_43
#error "Unable to compile Linux-emulator due to missing COMPAT_43 option!"
@ -48,6 +49,8 @@
#include <sys/syscallsubr.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
#include <sys/user.h>
#include <sys/vnode.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
@ -57,8 +60,15 @@
#include <sys/kernel.h>
#include <sys/module.h>
#include <machine/cpu.h>
#include <machine/md_var.h>
#include <sys/mutex.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <i386/linux/linux.h>
#include <i386/linux/linux_proto.h>
#include <compat/linux/linux_signal.h>
@ -709,6 +719,55 @@ linux_prepsyscall(struct trapframe *tf, int *args, u_int *code, caddr_t *params)
*params = NULL; /* no copyin */
}
/*
* Dump core, into a file named as described in the comments for
* expand_name(), unless the process was setuid/setgid.
*/
static int
linux_aout_coredump(struct thread *td, struct vnode *vp, off_t limit)
{
struct proc *p = td->td_proc;
struct ucred *cred = td->td_ucred;
struct vmspace *vm = p->p_vmspace;
caddr_t tempuser;
int error;
if (ctob((UAREA_PAGES + KSTACK_PAGES) +
vm->vm_dsize + vm->vm_ssize) >= limit)
return (EFAULT);
tempuser = malloc(ctob(UAREA_PAGES + KSTACK_PAGES), M_TEMP,
M_WAITOK | M_ZERO);
if (tempuser == NULL)
return (ENOMEM);
bcopy(p->p_uarea, tempuser, sizeof(struct user));
bcopy(td->td_frame,
tempuser + ctob(UAREA_PAGES) +
((caddr_t) td->td_frame - (caddr_t) td->td_kstack),
sizeof(struct trapframe));
PROC_LOCK(p);
fill_kinfo_proc(p, &p->p_uarea->u_kproc);
PROC_UNLOCK(p);
error = vn_rdwr(UIO_WRITE, vp, (caddr_t) tempuser,
ctob(UAREA_PAGES + KSTACK_PAGES),
(off_t)0, UIO_SYSSPACE, IO_UNIT, cred, NOCRED,
(int *)NULL, td);
free(tempuser, M_TEMP);
if (error == 0)
error = vn_rdwr(UIO_WRITE, vp, vm->vm_daddr,
(int)ctob(vm->vm_dsize),
(off_t)ctob(UAREA_PAGES + KSTACK_PAGES), UIO_USERSPACE,
IO_UNIT | IO_DIRECT, cred, NOCRED, (int *) NULL, td);
if (error == 0)
error = vn_rdwr_inchunks(UIO_WRITE, vp,
(caddr_t) trunc_page(USRSTACK - ctob(vm->vm_ssize)),
round_page(ctob(vm->vm_ssize)),
(off_t)ctob(UAREA_PAGES + KSTACK_PAGES) +
ctob(vm->vm_dsize), UIO_USERSPACE,
IO_UNIT | IO_DIRECT, cred, NOCRED, (int *) NULL, td);
return (error);
}
/*
* If a linux binary is exec'ing something, try this image activator
* first. We override standard shell script execution in order to
@ -768,7 +827,7 @@ struct sysentvec linux_sysvec = {
&linux_szsigcode,
linux_prepsyscall,
"Linux a.out",
aout_coredump,
linux_aout_coredump,
exec_linux_imgact_try,
LINUX_MINSIGSTKSZ,
PAGE_SIZE,