hello list:
I add some code to xen-3.1.0-src\xen\arch\x86\hvm\vmx\vmx.c to export some
information when vmx_vmexit_handler() executed:
-------------------------------------------------------------------------------------------------
--- vmx.c 2007-05-18 22:45:22.000000000 +0800
+++ vmx-patch.c 2008-11-24 14:19:18.000000000 +0800
@@ -50,7 +50,9 @@
#include <asm/hvm/vpt.h>
#include <public/hvm/save.h>
#include <asm/hvm/trace.h>
-
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
char *vmx_msr_bitmap;
static void vmx_ctxt_switch_from(struct vcpu *v);
@@ -2590,9 +2592,13 @@
unsigned int exit_reason;
unsigned long exit_qualification, inst_len = 0;
struct vcpu *v = current;
+ int test;
+ unsigned long FS_SELECTOR,FS_LIMIT,FS_AR_BYTES,FS_BASE,CR3;
+ FILE *fp;
+ char a=''\n'',b=''%'';
exit_reason = __vmread(VM_EXIT_REASON);
-
+
HVMTRACE_2D(VMEXIT, v, __vmread(GUEST_RIP), exit_reason);
perfc_incra(vmexits, exit_reason);
@@ -2711,6 +2717,27 @@
}
case EXIT_REASON_CR_ACCESS:
{
+ FS_SELECTOR=(unsigned long)__vmread(EXIT_QUALIFICATION);
+ FS_LIMIT=(unsigned long)__vmread(EXIT_QUALIFICATION);
+ FS_AR_BYTES=(unsigned long)__vmread(EXIT_QUALIFICATION);
+ FS_BASE=(unsigned long)__vmread(EXIT_QUALIFICATION);
+ CR3=(unsigned long)__vmread(EXIT_QUALIFICATION);
+
+ fp=fopen("/home/a.txt","a+");
+
+ fwrite(&FS_SELECTOR,sizeof(unsigned long),1,fp);
+ fwrite(&b,sizeof(char),1,fp);
+ fwrite(&FS_LIMIT,sizeof(unsigned long),1,fp);
+ fwrite(&b,sizeof(char),1,fp);
+ fwrite(&FS_AR_BYTES,sizeof(unsigned long),1,fp);
+ fwrite(&b,sizeof(char),1,fp);
+ fwrite(&FS_BASE,sizeof(unsigned long),1,fp);
+ fwrite(&b,sizeof(char),1,fp);
+ fwrite(&CR3,sizeof(unsigned long),1,fp);
+ fwrite(&a,sizeof(char),1,fp);
+
+ fclose(fp);
+
exit_qualification = __vmread(EXIT_QUALIFICATION);
inst_len = __get_instruction_length(); /* Safe: MOV Cn, LMSW, CLTS */
if ( vmx_cr_access(exit_qualification, regs) )
-----------------------------------------------------------------------------------------------------
but when I compiled the xen,the error occured:
vmx.c:53:19: 错误：stdio.h：No such file or directory
vmx.c:54:20: 错误：stdlib.h：No such file or directory
vmx.c:55:20: 错误：unistd.h：No such file or directory
How can I slove this problem?
Thanks.
_______________________________________________
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Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel
Oh, no... You can not use C's standard IO library in Xen at all. For example, Xen has no knowledge about the file system at all, so it can't understand a file path "/home/a.txt" at all. By a serial cable, you can use printk() to output the info you need(if you have no a cable at hand, check the "xm dmesg" in Dom0), or use some relatively complex methods to export the data in Xen to Dom0's userspace. -- Paul. S. 2008/11/23 lijiandm <lijiandm@163.com>:> hello list: > I add some code to xen-3.1.0-src\xen\arch\x86\hvm\vmx\vmx.c to export some > information when vmx_vmexit_handler() executed: > ------------------------------------------------------------------------------------------------- > --- vmx.c 2007-05-18 22:45:22.000000000 +0800 > +++ vmx-patch.c 2008-11-24 14:19:18.000000000 +0800 > @@ -50,7 +50,9 @@ > #include <asm/hvm/vpt.h> > #include <public/hvm/save.h> > #include <asm/hvm/trace.h> > - > +#include <stdio.h> > +#include <stdlib.h> > +#include <unistd.h> > char *vmx_msr_bitmap; > > static void vmx_ctxt_switch_from(struct vcpu *v); > @@ -2590,9 +2592,13 @@ > unsigned int exit_reason; > unsigned long exit_qualification, inst_len = 0; > struct vcpu *v = current; > + int test; > + unsigned long FS_SELECTOR,FS_LIMIT,FS_AR_BYTES,FS_BASE,CR3; > + FILE *fp; > + char a='\n',b='%'; > > exit_reason = __vmread(VM_EXIT_REASON); > - > + > HVMTRACE_2D(VMEXIT, v, __vmread(GUEST_RIP), exit_reason); > > perfc_incra(vmexits, exit_reason); > @@ -2711,6 +2717,27 @@ > } > case EXIT_REASON_CR_ACCESS: > { > + FS_SELECTOR=(unsigned long)__vmread(EXIT_QUALIFICATION); > + FS_LIMIT=(unsigned long)__vmread(EXIT_QUALIFICATION); > + FS_AR_BYTES=(unsigned long)__vmread(EXIT_QUALIFICATION); > + FS_BASE=(unsigned long)__vmread(EXIT_QUALIFICATION); > + CR3=(unsigned long)__vmread(EXIT_QUALIFICATION); > + > + fp=fopen("/home/a.txt","a+"); > + > + fwrite(&FS_SELECTOR,sizeof(unsigned long),1,fp); > + fwrite(&b,sizeof(char),1,fp); > + fwrite(&FS_LIMIT,sizeof(unsigned long),1,fp); > + fwrite(&b,sizeof(char),1,fp); > + fwrite(&FS_AR_BYTES,sizeof(unsigned long),1,fp); > + fwrite(&b,sizeof(char),1,fp); > + fwrite(&FS_BASE,sizeof(unsigned long),1,fp); > + fwrite(&b,sizeof(char),1,fp); > + fwrite(&CR3,sizeof(unsigned long),1,fp); > + fwrite(&a,sizeof(char),1,fp); > + > + fclose(fp); > + > exit_qualification = __vmread(EXIT_QUALIFICATION); > inst_len = __get_instruction_length(); /* Safe: MOV Cn, LMSW, CLTS > */ > if ( vmx_cr_access(exit_qualification, regs) ) > ----------------------------------------------------------------------------------------------------- > > but when I compiled the xen,the error occured: > vmx.c:53:19: 错误：stdio.h：No such file or directory > vmx.c:54:20: 错误：stdlib.h：No such file or directory > vmx.c:55:20: 错误：unistd.h：No such file or directory > > How can I slove this problem? > Thanks._______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Do you need to export plenty of data of Xen? If not, I think using printk() or debugtrace_printk() is the best choice. If you really have much data to export, I think you can look into how "xm dmesg" or xentrace is implemented. -- Paul. S. 2008/11/23 lijiandm <lijiandm@163.com>:> "use some relatively complex methods to export the data in Xen to Dom0's > userspace." > What's the complex methods ?Can you give me some suggestion? > Thanks. > > > 在2008-11-24，"Paul Samon" <paul.samon@gmail.com> 写道： >>Oh, no... You can not use C's standard IO library in Xen at all. >>For example, Xen has no knowledge about the file system at all, so it >>can't understand a file path "/home/a.txt" at all. >> >>By a serial cable, you can use printk() to output the info you need(if >>you have not a cable at hand, check the "xm dmesg" in Dom0), or use >>some relatively complex methods to export the data in Xen to Dom0's >>userspace. >> >>-- Paul. S. >> >>2008/11/23 lijiandm <lijiandm@163.com>: >>> hello list: >>> I add some code to xen-3.1.0-src\xen\arch\x86\hvm\vmx\vmx.c to export >>> some >>> information when vmx_vmexit_handler() executed: >>> >>> ------------------------------------------------------------------------------------------------- >>> --- vmx.c 2007-05-18 22:45:22.000000000 +0800 >>> +++ vmx-patch.c 2008-11-24 14:19:18.000000000 +0800 >>> @@ -50,7 +50,9 @@ >>> #include <asm/hvm/vpt.h> >>> #include <public/hvm/save.h> >>> #include <asm/hvm/trace.h> >>> - >>> +#include <stdio.h> >>> +#include <stdlib.h> >>> +#include <unistd.h> >>> char *vmx_msr_bitmap; >>> >>> static void vmx_ctxt_switch_from(struct vcpu *v); >>> @@ -2590,9 +2592,13 @@ >>> unsigned int exit_reason; >>> unsigned long exit_qualification, inst_len = 0; >>> struct vcpu *v = current; >>> + int test; >>> + unsigned long FS_SELECTOR,FS_LIMIT,FS_AR_BYTES,FS_BASE,CR3; >>> + FILE *fp; >>> + char a='\n',b='%'; >>> >>> exit_reason = __vmread(VM_EXIT_REASON); >>> - >>> + >>> HVMTRACE_2D(VMEXIT, v, __vmread(GUEST_RIP), exit_reason); >>> >>> perfc_incra(vmexits, exit_reason); >>> @@ -2711,6 +2717,27 @@ >>> } >>> case EXIT_REASON_CR_ACCESS: >>> { >>> + FS_SELECTOR=(unsigned long)__vmread(EXIT_QUALIFICATION); >>> + FS_LIMIT=(unsigned long)__vmread(EXIT_QUALIFICATION); >>> + FS_AR_BYTES=(unsigned long)__vmread(EXIT_QUALIFICATION); >>> + FS_BASE=(unsigned long)__vmread(EXIT_QUALIFICATION); >>> + CR3=(unsigned long)__vmread(EXIT_QUALIFICATION); >>> + >>> + fp=fopen("/home/a.txt","a+"); >>> + >>> + fwrite(&FS_SELECTOR,sizeof(unsigned long),1,fp); >>> + fwrite(&b,sizeof(char),1,fp); >>> + fwrite(&FS_LIMIT,sizeof(unsigned long),1,fp); >>> + fwrite(&b,sizeof(char),1,fp); >>> + fwrite(&FS_AR_BYTES,sizeof(unsigned long),1,fp); >>> + fwrite(&b,sizeof(char),1,fp); >>> + fwrite(&FS_BASE,sizeof(unsigned long),1,fp); >>> + fwrite(&b,sizeof(char),1,fp); >>> + fwrite(&CR3,sizeof(unsigned long),1,fp); >>> + fwrite(&a,sizeof(char),1,fp); >>> + >>> + fclose(fp); >>> + >>> exit_qualification = __vmread(EXIT_QUALIFICATION); >>> inst_len = __get_instruction_length(); /* Safe: MOV Cn, LMSW, >>> CLTS >>> */ >>> if ( vmx_cr_access(exit_qualification, regs) ) >>> >>> ----------------------------------------------------------------------------------------------------- >>> >>> but when I compiled the xen,the error occured: >>> vmx.c:53:19: 错误：stdio.h：No such file or directory >>> vmx.c:54:20: 错误：stdlib.h：No such file or directory >>> vmx.c:55:20: 错误：unistd.h：No such file or directory >>> >>> How can I slove this problem? >>> Thanks. >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel