Date: Mon, 30 Mar 2015 17:35:11 +0200 From: =?windows-1252?Q?Roger_Pau_Monn=E9?= <roger.pau@citrix.com> To: <araujo@FreeBSD.org>, <freebsd-xen@freebsd.org> Subject: Re: Unable to load multiboot kernel. Message-ID: <55196D2F.8040203@citrix.com> In-Reply-To: <CAOfEmZgT9nyJfEe5Z39qT9OSWkAa9RVY4xs0b4CjqN=3JJUU1A@mail.gmail.com> References: <CAOfEmZgT9nyJfEe5Z39qT9OSWkAa9RVY4xs0b4CjqN=3JJUU1A@mail.gmail.com>
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Hello,
El 30/03/15 a les 16.27, Marcelo Araujo ha escrit:
> Hi guys,
>
> I'm attempting to boot FreeBSD as Dom0 on ThinkPad E550 with an i7-5500U
> quad-core and 16G of ram.
>
> The FreeBSD is in the revision r280848 and Xen is the 4.6-unstable(checkout
> today). The FreeBSD kernel was built as amd64.
>
> So, the problem that I'm facing is that not possible to load multiboot
> kernel. Right after to load the XEN kernel, its attempt to load the next
> KERNEL, but I reach out at:
> sys/boot/i386/libi386/multiboot.c
> 167 error = elf32_loadfile_raw(filename, dest, result, 1);
> 168 if (error != 0) {
> 169 printf(
> 170 "elf32_loadfile_raw failed: %d unable to load multiboot
> kernel\n",
> 171 error);
> 172 goto out;
> 173 }
>
> I tried to boot at loader using:
> OK unload OK load /boot/xen dom0_mem=1024M dom0_max_vcpus=2 dom0pvh=1
> console=com1,vga
> boot/xen data=0x1e0090+0x7fd20f70 \
> OK load /boot/kernel/kernel
> /boot/kernel/kernel Unable to load /boot/kernel/kernel as a multiboot
> payload kernel
> /boot/kernel/kernel text=0x104c6a8 data=0x12dbb8+0x3fb0f0
> sysms=[0x8+0x148f98+0x8+0x164832]
> OK boot
>
> And the system is halted.
>
> Any idea?
That's something new, I've never seen this before. IMHO it seems like
arch_readin is failing to load the kernel into memory, but due to the
lack of messages I'm not sure. Could you try the patch above? It should
make the errors a little bit more chatty.
Roger.
diff --git a/sys/boot/common/module.c b/sys/boot/common/module.c
index b48b493..53ce358 100644
--- a/sys/boot/common/module.c
+++ b/sys/boot/common/module.c
@@ -380,6 +380,7 @@ file_loadraw(char *name, char *type, int insert)
/* We can't load first */
if ((file_findfile(NULL, NULL)) == NULL) {
+ printf("Can not load a raw file without a kernel\n");
command_errmsg = "can't load file before kernel";
return(NULL);
}
@@ -387,12 +388,14 @@ file_loadraw(char *name, char *type, int insert)
/* locate the file on the load path */
cp = file_search(name, NULL);
if (cp == NULL) {
+ printf("Cannot find %s file\n", name);
sprintf(command_errbuf, "can't find '%s'", name);
return(NULL);
}
name = cp;
if ((fd = open(name, O_RDONLY)) < 0) {
+ printf("can't open '%s': %s", name, strerror(errno));
sprintf(command_errbuf, "can't open '%s': %s", name, strerror(errno));
free(name);
return(NULL);
@@ -404,6 +407,7 @@ file_loadraw(char *name, char *type, int insert)
printf("%s ", name);
laddr = loadaddr;
+ printf("Trying to load a RAW file at 0x%lx ", laddr);
for (;;) {
/* read in 4k chunks; size is not really important */
got = archsw.arch_readin(fd, laddr, 4096);
@@ -411,6 +415,7 @@ file_loadraw(char *name, char *type, int insert)
break;
if (got < 0) { /* error */
sprintf(command_errbuf, "error reading '%s': %s", name, strerror(errno));
+ printf("Error reading %s: %s\n", name, strerror(errno));
free(name);
close(fd);
return(NULL);
diff --git a/sys/boot/i386/libi386/multiboot.c b/sys/boot/i386/libi386/multiboot.c
index 11c35df..a3f3084 100644
--- a/sys/boot/i386/libi386/multiboot.c
+++ b/sys/boot/i386/libi386/multiboot.c
@@ -373,7 +373,7 @@ multiboot_obj_loadfile(char *filename, u_int64_t dest,
printf(
"Unable to load %s as a multiboot payload kernel\n",
filename);
- return (EFTYPE);
+ return (EINVAL);
}
/* Load kernel metadata... */
@@ -382,7 +382,7 @@ multiboot_obj_loadfile(char *filename, u_int64_t dest,
if (error) {
printf("Unable to load kernel %s metadata error: %d\n",
rfp->f_name, error);
- return (EFTYPE);
+ return (EINVAL);
}
/*
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