On Fri, 2010-07-30 at 10:02 +0100, Ian Campbell wrote:
>
> I used a version of valgrind which I have patched to understand the
> PRIVCMD_HYPERCALL ioctl on /proc/xen/privcmd. It currently understands
> exactly one sysctl (XEN_SYSCTL_getdomaininfolist). I will post the
> patch shortly and imagine I will be expanding it as I test other xl
> commands etc.
Here is the patch I used. It's obviously very basic and terribly
incomplete, only understands a single sysctl, only for the version of
Xen it is built against, is my first attempt at hacking valgrind, etc
etc.
I also bailed on the normal valgrind policy of duplicating the interface
headers so usage is:
./configure --with-xen=/path/to/headers
The path needs to be to an installed set of xen headers, such that
"#include <xen/xen.h>" is valid e.g. dist/install/usr/include in your
built Xen tree or /usr/include or something equivalent (e.g. libxen-dev
installed under Debian etc.)
Ian.
diff --git a/configure.in b/configure.in
index 62e1837..e71ecd6 100644
--- a/configure.in
+++ b/configure.in
@@ -1558,6 +1558,11 @@ elif test x$VGCONF_PLATFORM_SEC_CAPS = xPPC32_AIX5 ; then
mflag_secondary=-q32
fi
+AC_ARG_WITH(xen,
+ [ --with-xen= Specify location of Xen headers],
+ XEN_CFLAGS=-I$withval
+)
+AC_SUBST(XEN_CFLAGS)
AC_ARG_WITH(mpicc,
[ --with-mpicc= Specify name of MPI2-ised C compiler],
diff --git a/coregrind/Makefile.am b/coregrind/Makefile.am
index d9d1bca..d7216f9 100644
--- a/coregrind/Makefile.am
+++ b/coregrind/Makefile.am
@@ -211,6 +211,7 @@ noinst_HEADERS = \
m_syswrap/priv_syswrap-aix5.h \
m_syswrap/priv_syswrap-darwin.h \
m_syswrap/priv_syswrap-main.h \
+ m_syswrap/priv_syswrap-xen.h \
m_ume/priv_ume.h
#----------------------------------------------------------------------------
@@ -338,6 +339,7 @@ COREGRIND_SOURCES_COMMON = \
m_syswrap/syswrap-ppc64-aix5.c \
m_syswrap/syswrap-x86-darwin.c \
m_syswrap/syswrap-amd64-darwin.c \
+ m_syswrap/syswrap-xen.c \
m_ume/elf.c \
m_ume/macho.c \
m_ume/main.c \
@@ -350,7 +352,7 @@ nodist_libcoregrind_@VGCONF_ARCH_PRI@_@VGCONF_OS@_a_SOURCES
= \
libcoregrind_@VGCONF_ARCH_PRI@_@VGCONF_OS@_a_CPPFLAGS = \
$(AM_CPPFLAGS_@VGCONF_PLATFORM_PRI_CAPS@)
libcoregrind_@VGCONF_ARCH_PRI@_@VGCONF_OS@_a_CFLAGS = \
- $(AM_CFLAGS_@VGCONF_PLATFORM_PRI_CAPS@)
+ $(AM_CFLAGS_@VGCONF_PLATFORM_PRI_CAPS@) @XEN_CFLAGS@
libcoregrind_@VGCONF_ARCH_PRI@_@VGCONF_OS@_a_CCASFLAGS = \
$(AM_CCASFLAGS_@VGCONF_PLATFORM_PRI_CAPS@)
if VGCONF_HAVE_PLATFORM_SEC
diff --git a/coregrind/m_syswrap/priv_syswrap-xen.h
b/coregrind/m_syswrap/priv_syswrap-xen.h
new file mode 100644
index 0000000..c65edca
--- /dev/null
+++ b/coregrind/m_syswrap/priv_syswrap-xen.h
@@ -0,0 +1,10 @@
+#ifndef __PRIV_SYSWRAP_XEN_H
+#define __PRIV_SYSWRAP_XEN_H
+
+DECL_TEMPLATE(xen, ioctl_privcmd_hypercall);
+
+#endif // __PRIV_SYSWRAP_XEN_H
+
+/*--------------------------------------------------------------------*/
+/*--- end ---*/
+/*--------------------------------------------------------------------*/
diff --git a/coregrind/m_syswrap/syswrap-linux.c
b/coregrind/m_syswrap/syswrap-linux.c
index 247402d..42dc4d9 100644
--- a/coregrind/m_syswrap/syswrap-linux.c
+++ b/coregrind/m_syswrap/syswrap-linux.c
@@ -57,7 +57,7 @@
#include "priv_types_n_macros.h"
#include "priv_syswrap-generic.h"
#include "priv_syswrap-linux.h"
-
+#include "priv_syswrap-xen.h"
// Run a thread from beginning to end and return the thread's
// scheduler-return-code.
@@ -4821,6 +4821,11 @@ PRE(sys_ioctl)
}
break;
+
+ case VKI_XEN_IOCTL_PRIVCMD_HYPERCALL:
+ WRAPPER_PRE_NAME(xen, ioctl_privcmd_hypercall)(tid, layout, arrghs,
status, flags);
+ break;
+
default:
/* EVIOC* are variable length and return size written on success */
switch (ARG2 & ~(_VKI_IOC_SIZEMASK << _VKI_IOC_SIZESHIFT)) {
@@ -5633,6 +5638,10 @@ POST(sys_ioctl)
}
break;
+ case VKI_XEN_IOCTL_PRIVCMD_HYPERCALL:
+ WRAPPER_POST_NAME(xen, ioctl_privcmd_hypercall)(tid, arrghs, status);
+ break;
+
default:
/* EVIOC* are variable length and return size written on success */
switch (ARG2 & ~(_VKI_IOC_SIZEMASK << _VKI_IOC_SIZESHIFT)) {
diff --git a/coregrind/m_syswrap/syswrap-xen.c
b/coregrind/m_syswrap/syswrap-xen.c
new file mode 100644
index 0000000..53e6078
--- /dev/null
+++ b/coregrind/m_syswrap/syswrap-xen.c
@@ -0,0 +1,117 @@
+#include "pub_core_basics.h"
+#include "pub_core_vki.h"
+#include "pub_core_vkiscnums.h"
+#include "pub_core_threadstate.h"
+#include "pub_core_aspacemgr.h"
+#include "pub_core_debuginfo.h" // VG_(di_notify_*)
+#include "pub_core_transtab.h" // VG_(discard_translations)
+#include "pub_core_xarray.h"
+#include "pub_core_clientstate.h"
+#include "pub_core_debuglog.h"
+#include "pub_core_libcbase.h"
+#include "pub_core_libcassert.h"
+#include "pub_core_libcfile.h"
+#include "pub_core_libcprint.h"
+#include "pub_core_libcproc.h"
+#include "pub_core_libcsignal.h"
+#include "pub_core_mallocfree.h"
+#include "pub_core_tooliface.h"
+#include "pub_core_options.h"
+#include "pub_core_scheduler.h"
+#include "pub_core_signals.h"
+#include "pub_core_syscall.h"
+#include "pub_core_syswrap.h"
+
+#include "priv_types_n_macros.h"
+#include "priv_syswrap-generic.h"
+#include "priv_syswrap-xen.h"
+
+#include <stdint.h>
+
+#define __XEN_TOOLS__
+
+#include <xen/xen.h>
+#include <xen/sysctl.h>
+
+
+#define PRE(name) DEFN_PRE_TEMPLATE(xen, name)
+#define POST(name) DEFN_POST_TEMPLATE(xen, name)
+
+PRE(ioctl_privcmd_hypercall)
+{
+ struct vki_xen_privcmd_hypercall *args = (struct vki_xen_privcmd_hypercall
*)(ARG3);
+
+ if (!args)
+ return;
+
+
+ switch (args->op) {
+ case __HYPERVISOR_sysctl: {
+ struct xen_sysctl *sysctl = (struct xen_sysctl *)(unsigned
int)args->arg[0];
+
+ PRINT("__HYPERVISOR_sysctl ( %d )", sysctl->cmd);
+
+ /* Single argument hypercall */
+ PRE_MEM_READ("hypercall", ARG3, 8 + ( 8 * 1 ) );
+
+ /* Common part of xen_sysctl */
+ PRE_MEM_READ("__HYPERVISOR_sysctl", args->arg[0], ( 4 + 4 ));
+
+ if (!sysctl || sysctl->interface_version != XEN_SYSCTL_INTERFACE_VERSION)
+ /* BUG ? */
+ return;
+
+ //PRE_REG_READ1(long, "__HYPERVISOR_sysctl",);
+ switch (sysctl->cmd) {
+ case XEN_SYSCTL_getdomaininfolist:
+ PRE_MEM_READ("__HYPERVISOR_sysctl",
&sysctl->u.getdomaininfolist.first_domain, sizeof(domid_t));
+ PRE_MEM_READ("__HYPERVISOR_sysctl",
&sysctl->u.getdomaininfolist.max_domains, sizeof(uint32_t));
+ PRE_MEM_READ("__HYPERVISOR_sysctl",
&sysctl->u.getdomaininfolist.buffer,
sizeof(&sysctl->u.getdomaininfolist.buffer));
+ break;
+
+ default:
+ VG_(printf)("pre sysctl version %x unknown cmd %d\n",
+ sysctl->interface_version, sysctl->cmd);
+ break;
+ }
+ }
+ break;
+
+ default:
+ VG_(printf)("pre unknown hypercall %lld ( 0x%#llx, 0x%#llx, 0x%#llx,
0x%#llx, 0x%#llx )\n",
+ args->op, args->arg[0], args->arg[1], args->arg[2],
args->arg[3], args->arg[4]);
+ }
+}
+
+POST(ioctl_privcmd_hypercall)
+{
+ struct vki_xen_privcmd_hypercall *args = (struct vki_xen_privcmd_hypercall
*)(ARG3);
+
+ if (!args)
+ return;
+
+ switch (args->op) {
+ case __HYPERVISOR_sysctl: {
+ struct xen_sysctl *sysctl = (struct xen_sysctl *)(unsigned
int)args->arg[0];
+
+ if (!sysctl || sysctl->interface_version != XEN_SYSCTL_INTERFACE_VERSION)
+ return;
+
+ switch (sysctl->cmd) {
+ case XEN_SYSCTL_getdomaininfolist:
+ POST_MEM_WRITE(&sysctl->u.getdomaininfolist.num_domains,
sizeof(sysctl->u.getdomaininfolist.num_domains));
+ POST_MEM_WRITE(sysctl->u.getdomaininfolist.buffer.p,
sizeof(xen_domctl_getdomaininfo_t) * sysctl->u.getdomaininfolist.num_domains);
+ break;
+ default:
+ VG_(printf)("post sysctl version %x cmd %d\n",
+ sysctl->interface_version, sysctl->cmd);
+ break;
+ }
+ break;
+ }
+ default:
+ VG_(printf)("post unknown hypercall %lld ( 0x%#llx, 0x%#llx, 0x%#llx,
0x%#llx, 0x%#llx )\n",
+ args->op, args->arg[0], args->arg[1], args->arg[2],
args->arg[3], args->arg[4]);
+ break;
+ }
+}
diff --git a/include/Makefile.am b/include/Makefile.am
index 33d0857..22bffa7 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -54,7 +54,8 @@ nobase_pkginclude_HEADERS = \
vki/vki-scnums-ppc64-linux.h \
vki/vki-scnums-x86-linux.h \
vki/vki-scnums-arm-linux.h \
- vki/vki-scnums-darwin.h
+ vki/vki-scnums-darwin.h
+ vki/vki-xen.h
noinst_HEADERS = \
vki/vki-ppc32-aix5.h \
diff --git a/include/pub_tool_vki.h b/include/pub_tool_vki.h
index 73a4174..c4c117f 100644
--- a/include/pub_tool_vki.h
+++ b/include/pub_tool_vki.h
@@ -47,6 +47,7 @@
#if defined(VGO_linux)
# include "vki/vki-linux.h"
+# include "vki/vki-xen.h"
#elif defined(VGP_ppc32_aix5)
# include "vki/vki-ppc32-aix5.h"
#elif defined(VGP_ppc64_aix5)
diff --git a/include/vki/vki-linux.h b/include/vki/vki-linux.h
index beff378..86126ea 100644
--- a/include/vki/vki-linux.h
+++ b/include/vki/vki-linux.h
@@ -2709,6 +2709,17 @@ struct vki_getcpu_cache {
#define VKI_EV_MAX 0x1f
#define VKI_EV_CNT (VKI_EV_MAX+1)
+//----------------------------------------------------------------------
+// Xen privcmd IOCTL
+//----------------------------------------------------------------------
+
+struct vki_xen_privcmd_hypercall {
+ __vki_u64 op;
+ __vki_u64 arg[5];
+};
+
+#define VKI_XEN_IOCTL_PRIVCMD_HYPERCALL _VKI_IOC(_VKI_IOC_NONE, 'P', 0,
sizeof(struct vki_xen_privcmd_hypercall))
+
#endif // __VKI_LINUX_H
/*--------------------------------------------------------------------*/
diff --git a/include/vki/vki-xen.h b/include/vki/vki-xen.h
new file mode 100644
index 0000000..7842cc9
--- /dev/null
+++ b/include/vki/vki-xen.h
@@ -0,0 +1,8 @@
+#ifndef __VKI_XEN_H
+#define __VKI_XEN_H
+
+#endif // __VKI_XEN_H
+
+/*--------------------------------------------------------------------*/
+/*--- end ---*/
+/*--------------------------------------------------------------------*/
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