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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Problem with Xen headerfiles
On Tue, Jul 02, 2013 at 06:06:43PM +0430, Mina Jafari wrote:
> I tryied to implement it in xen but this time I had problems with xc_***
> functions which are in libxc library and can't be used there!
> where I really should implement this program?
>
So "implement it in Xen" means you're trying to add functionality to
Xen. I don't know what you're trying to do, but apparently you're mixing
Xen internal things with user space tool libraries. If you need to
modify Xen, don't include *any* user space headers, and don't link
against user space libraries.
On the other hand, to develop a user space program, you might be better
off using your distro's pre-packaged Xen and its development package /
header files.
Wei.
>
> On Tue, Jul 2, 2013 at 12:39 PM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
>
> > As you're writing a user space program you should only include public
> > headers installed in your system. Including internal header files of Xen
> > will not work.
> >
> >
> > Wei.
> >
> > On Tue, Jul 02, 2013 at 12:09:41PM +0430, Mina Jafari wrote:
> > > Hi all,
> > > I'm trying to compile this program to map domu's page. But it returns
> > > errors that can't find headerfiles!
> > >
> > > *gcc -c map_page.c -I/***/xen/xen-4.1.2/xen/include -lxenctrl -o
> > > map_page.o*
> > > *In file included from
> > > /home/ossl5/xen/xen-4.1.2original/xen/include/asm/smp.h:16:0,
> > > from
> > > /home/ossl5/xen/xen-4.1.2original/xen/include/xen/smp.h:5,
> > > from
> > > /home/ossl5/xen/xen-4.1.2original/xen/include/xen/sched.h:8,
> > > from /usr/include/xenctrl.h:43,
> > > from map_page.c:2:
> > > /home/ossl5/xen/xen-4.1.2original/xen/include/asm-x86/mpspec.h:6:25:
> > fatal
> > > error: mach_mpspec.h: No such file or directory
> > > compilation terminated.
> > > *
> > >
> > > And as I see this file isn't really located in this directory. I modified
> > > the path included, and compile it again. This time returned error about
> > not
> > > finding another headerfile and "previous declaration"!
> > >
> > > *gcc -I/***/xen/xen-4.1.2original/xen/include -lxenctrl map_page.c -o
> > > map_page.o
> > > In file included from
> > > /***/xen/xen-4.1.2original/xen/include/xen/sched.h:9:0,
> > > from /usr/include/xenctrl.h:43,
> > > from map_page.c:2:
> > > /***/xen/xen-4.1.2original/xen/include/xen/shared.h:13:3: error:
> > > conflicting types for âshared_info_tâ
> > > In file included from /usr/include/xenctrl.h:37:0,
> > > from map_page.c:2:
> > > /usr/include/xen/xen.h:537:28: note: previous declaration of
> > > âshared_info_tâ was here
> > > In file included from
> > > /***/xen/xen-4.1.2original/xen/include/xen/sched.h:9:0,
> > > from /usr/include/xenctrl.h:43,
> > > from map_page.c:2:
> > > /***/xen/xen-4.1.2original/xen/include/xen/shared.h:28:3: error:
> > > conflicting types for âvcpu_info_tâ
> > > In file included from /usr/include/xenctrl.h:37:0,
> > > from map_page.c:2:
> > > /usr/include/xen/xen.h:477:26: note: previous declaration of
> > âvcpu_info_tâ
> > > was here
> > > In file included from
> > > /***/xen/xen-4.1.2original/xen/include/xen/hvm/irq.h:28:0,
> > > from
> > > /***/xen/xen-4.1.2original/xen/include/asm/hvm/irq.h:25,
> > > from
> > > /***/xen/xen-4.1.2original/xen/include/asm/hvm/vpt.h:32,
> > > from
> > > /***/xen/xen-4.1.2original/xen/include/asm/hvm/vlapic.h:27,
> > > from
> > > /***/xen/xen-4.1.2original/xen/include/asm/hvm/vcpu.h:25,
> > > from
> > /***/xen/xen-4.1.2original/xen/include/asm/domain.h:6,
> > > from
> > /***/xen/xen-4.1.2original/xen/include/xen/domain.h:6,
> > > from
> > /***/xen/xen-4.1.2original/xen/include/xen/sched.h:19,
> > > from /usr/include/xenctrl.h:43,
> > > from map_page.c:2:
> > > /***/xen/xen-4.1.2original/xen/include/asm/irq.h:10:25: fatal error:
> > > irq_vectors.h: No such file or directory
> > > compilation terminated.*
> > >
> > > Am I compiling it in a wrong way that it couldn't find headerfiles?
> > >
> > > Here is my program "map_page.c" located in xen directory.
> > > *
> > > #include <stdio.h>
> > > #include <xenctrl.h>
> > > #include <xs_api.h>
> > > #include <asm-x86/current.h>
> > > #include <xen/sched.h>
> > >
> > >
> > > typedef unsigned long long guest_word_t;
> > >
> > > int main()
> > > {
> > >
> > > vcpu_guest_context_any_t *vcpu_ctx_any;
> > > int vcpu = 0;
> > > int ret = 0 ;
> > > xc_interface *xch = 0;
> > > char *domid = 0;
> > > char *buffer;
> > > guest_word_t virt;
> > >
> > >
> > >
> > >
> > > struct xs_handle *h = xs_daemon_open();
> > > xch = xc_interface_open(0,0,0);
> > > if (xc_handle < 0) {
> > > printf ("error : xc_interface_open");
> > > exit (-1);
> > > }
> > >
> > > domid = get_dom_domid (h);
> > > //typedef struct vcpu *current_vcpu = get_cpu_info()->current_vcpu;
> > > //vcpu = current_vcpu.vcpu_id;
> > > vcpu_setcontext (vcpu);
> > > buffer = (char)map_page(vcpu_ctx_any,vcpu,virt);
> > >
> > >
> > > xc_interface_close(xch);
> > > return(0);
> > > }
> > >
> > >
> > >
> > > static void *map_page(vcpu_guest_context_any_t *ctx, int vcpu,
> > guest_word_t
> > > virt)
> > > {
> > > static unsigned long previous_mfn = 0;
> > > static void *mapped = NULL;
> > >
> > > unsigned long mfn = xc_translate_foreign_address(xc_handle, domid,
> > > vcpu, virt);
> > > unsigned long offset = virt & ~XC_PAGE_MASK;
> > >
> > > if (mapped && mfn == previous_mfn)
> > > goto out;
> > >
> > > if (mapped)
> > > munmap(mapped, XC_PAGE_SIZE);
> > >
> > > previous_mfn = mfn;
> > >
> > > mapped = xc_map_foreign_range(xc_handle, domid, XC_PAGE_SIZE, 0,
> > mfn);
> > >
> > > if (mapped == NULL) {
> > > fprintf(stderr, "failed to map page.\n");
> > > exit(-1);
> > > }
> > >
> > > out:
> > > return (void *)(mapped + offset);
> > > }
> > > *
> >
> > > _______________________________________________
> > > Xen-devel mailing list
> > > Xen-devel@xxxxxxxxxxxxx
> > > http://lists.xen.org/xen-devel
> >
> >
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