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[Xen-devel] Building PVH mini-os with libc support

Hello all,

I am trying to build PVH mini-os with libc support. These are the steps I have followed so far:

1. Xen repo (master: commit id: d2f86bf604698806d311cc251c1b66fbb752673c)

2. mini-os repo (master: commit id: 0b4b7897e08b967a09bed2028a79fabff82342dd)
Made the following modifications in the xen repo to build c-stubdom:


diff --git a/stubdom/Makefile b/stubdom/Makefile

index f45eeabd8b..aa21904019 100644

--- a/stubdom/Makefile

+++ b/stubdom/Makefile

@@ -61,7 +61,7 @@ TARGET_CPPFLAGS += -I$(XEN_ROOT)/xen/include


 TARGET_LDFLAGS += -nostdlib -L$(CROSS_PREFIX)/$(GNU_TARGET_ARCH)-xen-elf/lib






 genpath-target = $(call buildmakevars2file,$(STUBDOMPATH))

diff --git a/stubdom/c/minios.cfg b/stubdom/c/minios.cfg

index e69de29bb2..cacde0cbca 100644

--- a/stubdom/c/minios.cfg

+++ b/stubdom/c/minios.cfg

@@ -0,0 +1,18 @@

















4. $ cd $(XEN_ROOT)

5. $ make; sudo make instal
Reboot host
7. $ cd $(XEN_ROOT)/stubdom     
$ make c-stubdom
Used the following configuration file to create the domain:








When I create the domain it crashes during the bootstrap process with a triple fault. The following are the dmesg logs (note that "Xen Minimal OS (hvm)!" is printed and the domain crashes after that line in setup.c):


(XEN) grant_table.c:1688:d0v3 Expanding d360 grant table from 0 to 1 frames

(XEN) HVM360 save: CPU

(XEN) HVM360 save: PIC

(XEN) HVM360 save: IOAPIC

(XEN) HVM360 save: LAPIC


(XEN) HVM360 save: PCI_IRQ

(XEN) HVM360 save: ISA_IRQ

(XEN) HVM360 save: PCI_LINK

(XEN) HVM360 save: PIT

(XEN) HVM360 save: RTC

(XEN) HVM360 save: HPET

(XEN) HVM360 save: PMTIMER

(XEN) HVM360 save: MTRR


(XEN) HVM360 save: CPU_XSAVE


(XEN) HVM360 save: VMCE_VCPU


(XEN) HVM360 restore: CPU 0

(d360) Bootstrapping...

(XEN) Dom360 callback via changed to Direct Vector 0x20

(d360) Xen Minimal OS (hvm)!

(XEN) d360v0 Triple fault - invoking HVM shutdown action 1

(XEN) *** Dumping Dom360 vcpu#0 state: ***

(XEN) ----[ Xen-4.10.0-rc  x86_64  debug=y   Not tainted ]----

(XEN) CPU:    7

(XEN) RIP:    0008:[<0000000000056fc8>]

(XEN) RFLAGS: 0000000000010006   CONTEXT: hvm guest (d360v0)

(XEN) rax: 00000000000bfe75   rbx: 00000000000bfe75   rcx: 0000000000000000

(XEN) rdx: 0000000000000017   rsi: 00000000000bfe60   rdi: 0000000000000000

(XEN) rbp: 00000000000bfec0   rsp: 00000000000bfe60   r8:  0000000000000000

(XEN) r9:  0000000000089982   r10: 0000000000000016   r11: 0000000000000000

(XEN) r12: 0000000000000017   r13: 0000000000000016   r14: 0000000000000000

(XEN) r15: 0d8b4c1575ff8548   cr0: 0000000080000011   cr4: 0000000000000220

(XEN) cr3: 0000000000099000   cr2: 0000000000000000

(XEN) fsb: 0000000000000000   gsb: 0000000000000000   gss: 0000000000000000

(XEN) ds: 0033   es: 0033   fs: 0033   gs: 0033   ss: 0000   cs: 0008



Any help on this would be greatly appreciated. In addition to this I have noticed that even fter installing Xen and rebooting the host, the initial ‘xl dmesg’ logs show that Xen tries to launch unsuccessfully domains created before the system was rebooted. I am not sure if these two issues are related but I pasting a trace of the logs (these dmesg logs are seen just after rebooting the host before attempting anything else):


root@debianxen:/home/balvisio# xl dmesg

(XEN) parameter "placeholder" unknown!

 Xen 4.10.0-rc

(XEN) Xen version 4.10.0-rc (balvisio@xxxxxxxxxxxxx) (gcc (Debian 6.3.0-18) 6.3.0 20170516) debug=y  Thu Dec 28 09:53:12 PST 2017

(XEN) Latest ChangeSet: Thu Nov 16 21:34:02 2017 +0000 git:d2f86bf604-dirty

(XEN) Bootloader: GRUB 2.02~beta3-5

(XEN) Command line: placeholder

(XEN) Xen image load base address: 0

(XEN) Video information:

(XEN)  VGA is text mode 80x25, font 8x16

(XEN)  VBE/DDC methods: none; EDID transfer time: 0 seconds

(XEN)  EDID info not retrieved because no DDC retrieval method detected

(XEN) Disc information:

(XEN)  Found 2 MBR signatures

(XEN)  Found 2 EDD information structures

(XEN) Xen-e820 RAM map:

(XEN)  0000000000000000 - 000000000009a400 (usable)

(XEN)  000000000009a400 - 00000000000a0000 (reserved)

(XEN)  00000000000e0000 - 0000000000100000 (reserved)

(XEN)  0000000000100000 - 00000000bf406000 (usable)

(XEN)  00000000bf406000 - 00000000bf452000 (ACPI NVS)

(XEN)  00000000bf452000 - 00000000bf45a000 (ACPI data)

(XEN)  00000000bf45a000 - 00000000bf477000 (reserved)

(XEN)  00000000bf477000 - 00000000bf478000 (ACPI NVS)

(XEN)  00000000bf478000 - 00000000bf489000 (reserved)

(XEN)  00000000bf489000 - 00000000bf48c000 (ACPI NVS)

(XEN)  00000000bf48c000 - 00000000bf4ad000 (reserved)

(XEN)  00000000bf4ad000 - 00000000bf4af000 (usable)

(XEN)  00000000bf4af000 - 00000000bf503000 (reserved)

(XEN)  00000000bf503000 - 00000000bf50d000 (ACPI NVS)

(XEN)  00000000bf50d000 - 00000000bf533000 (reserved)

(XEN)  00000000bf533000 - 00000000bf576000 (ACPI NVS)

(XEN)  00000000bf576000 - 00000000bf800000 (usable)

(XEN)  00000000fed1c000 - 00000000fed40000 (reserved)

(XEN)  00000000ff000000 - 0000000100000000 (reserved)

(XEN)  0000000100000000 - 0000000440000000 (usable)

(XEN) New Xen image base address: 0xbee00000

(XEN) ACPI: RSDP 000F0450, 0024 (r2 SUPERM)

(XEN) ACPI: XSDT BF452078, 0074 (r1 SUPERM SMCI--MB        1 AMI     10013)

(XEN) ACPI: FACP BF458B38, 00F4 (r4 SUPERM SMCI--MB        1 AMI     10013)

(XEN) ACPI: DSDT BF452180, 69B8 (r2 SUPERM SMCI--MB        0 INTL 20051117)

(XEN) ACPI: FACS BF50AF80, 0040

(XEN) ACPI: APIC BF458C30, 0092 (r3 SUPERM SMCI--MB        1 AMI     10013)

(XEN) ACPI: SSDT BF458CC8, 01D6 (r1 AMICPU     PROC        1 MSFT  3000001)

(XEN) ACPI: MCFG BF458EA0, 003C (r1 SUPERM SMCI--MB        1 MSFT       97)

(XEN) ACPI: HPET BF458EE0, 0038 (r1 SUPERM SMCI--MB        1 AMI.        4)

(XEN) ACPI: SPMI BF458F18, 0040 (r5 A M I   OEMSPMI        0 AMI.        0)

(XEN) ACPI: EINJ BF458F58, 0130 (r1    AMI AMI EINJ        0             0)

(XEN) ACPI: ERST BF459088, 0210 (r1  AMIER AMI ERST        0             0)

(XEN) ACPI: HEST BF459298, 00A8 (r1    AMI AMI HEST        0             0)

(XEN) ACPI: BERT BF459340, 0030 (r1    AMI AMI BERT        0             0)

(XEN) System RAM: 16374MB (16767152kB)

(XEN) No NUMA configuration found

(XEN) Faking a node at 0000000000000000-0000000440000000

(XEN) Domain heap initialised

(XEN) CPU Vendor: Intel, Family 6 (0x6), Model 42 (0x2a), Stepping 7 (raw 000206a7)

(XEN) found SMP MP-table at 000fcd80

(XEN) DMI 2.7 present.

(XEN) Using APIC driver default

(XEN) ACPI: PM-Timer IO Port: 0x408 (32 bits)

(XEN) ACPI: SLEEP INFO: pm1x_cnt[1:404,1:0], pm1x_evt[1:400,1:0]

(XEN) ACPI: 32/64X FACS address mismatch in FADT - bf50af80/0000000000000000, using 32

(XEN) ACPI:             wakeup_vec[bf50af8c], vec_size[20]

(XEN) ACPI: Local APIC address 0xfee00000

(XEN) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)

(XEN) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x02] enabled)

(XEN) ACPI: LAPIC (acpi_id[0x03] lapic_id[0x04] enabled)

(XEN) ACPI: LAPIC (acpi_id[0x04] lapic_id[0x06] enabled)

(XEN) ACPI: LAPIC (acpi_id[0x05] lapic_id[0x01] enabled)

(XEN) ACPI: LAPIC (acpi_id[0x06] lapic_id[0x03] enabled)

(XEN) ACPI: LAPIC (acpi_id[0x07] lapic_id[0x05] enabled)

(XEN) ACPI: LAPIC (acpi_id[0x08] lapic_id[0x07] enabled)

(XEN) ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1])

(XEN) ACPI: IOAPIC (id[0x00] address[0xfec00000] gsi_base[0])

(XEN) IOAPIC[0]: apic_id 0, version 32, address 0xfec00000, GSI 0-23

(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)

(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)

(XEN) ACPI: IRQ0 used by override.

(XEN) ACPI: IRQ2 used by override.

(XEN) ACPI: IRQ9 used by override.

(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs

(XEN) ACPI: HPET id: 0x8086a701 base: 0xfed00000

(XEN) Xen ERST support is initialized.

(XEN) HEST: Table parsing has been initialized

(XEN) Using ACPI (MADT) for SMP configuration information

(XEN) SMP: Allowing 8 CPUs (0 hotplug CPUs)

(XEN) IRQ limits: 24 GSI, 1528 MSI/MSI-X

(XEN) Not enabling x2APIC: depends on iommu_supports_eim.

(XEN) xstate: size: 0x340 and states: 0x7

(XEN) mce_intel.c:782: MCA Capability: firstbank 0, extended MCE MSR 0, BCAST, CMCI

(XEN) CPU0: Intel machine check reporting enabled

(XEN) Using scheduler: SMP Credit Scheduler (credit)

(XEN) Platform timer is 14.318MHz HPET

(XEN) Detected 3192.768 MHz processor.

(XEN) Initing memory sharing.

(XEN) alt table ffff82d080451778 -> ffff82d080452d98

(XEN) PCI: MCFG configuration 0: base e0000000 segment 0000 buses 00 - ff

(XEN) PCI: Not using MCFG for segment 0000 bus 00-ff

(XEN) I/O virtualisation disabled

(XEN) nr_sockets: 1

(XEN) Enabled directed EOI with ioapic_ack_old on!


(XEN)  -> Using old ACK method

(XEN) ..TIMER: vector=0xF0 apic1=0 pin1=2 apic2=-1 pin2=-1

(XEN) TSC deadline timer enabled

(XEN) Allocated console ring of 64 KiB.

(XEN) mwait-idle: MWAIT substates: 0x1120

(XEN) mwait-idle: v0.4.1 model 0x2a

(XEN) mwait-idle: lapic_timer_reliable_states 0xffffffff

(XEN) VMX: Supported advanced features:

(XEN)  - APIC MMIO access virtualisation

(XEN)  - APIC TPR shadow

(XEN)  - Extended Page Tables (EPT)

(XEN)  - Virtual-Processor Identifiers (VPID)

(XEN)  - Virtual NMI

(XEN)  - MSR direct-access bitmap

(XEN)  - Unrestricted Guest

(XEN) HVM: ASIDs enabled.

(XEN) HVM: VMX enabled

(XEN) HVM: Hardware Assisted Paging (HAP) detected

(XEN) HVM: HAP page sizes: 4kB, 2MB

(XEN) Brought up 8 CPUs

(XEN) build-id: bca1c3697611c869f348a4b7c4bfe326d0cbbc25

(XEN) Running stub recovery selftests...

(XEN) traps.c:1540: GPF (0000): ffff82d0bffff041 [ffff82d0bffff041] -> ffff82d08036d2f2

(XEN) traps.c:739: Trap 12: ffff82d0bffff040 [ffff82d0bffff040] -> ffff82d08036d2f2

(XEN) traps.c:1076: Trap 3: ffff82d0bffff041 [ffff82d0bffff041] -> ffff82d08036d2f2

(XEN) ACPI sleep modes: S3

(XEN) VPMU: disabled

(XEN) mcheck_poll: Machine check polling timer started.

(XEN) Dom0 has maximum 792 PIRQs

(XEN) grant_table.c:1688:IDLEv0 Expanding d0 grant table from 0 to 1 frames

(XEN) NX (Execute Disable) protection active


(XEN) ELF: phdr: paddr=0x1000000 memsz=0xaca000

(XEN) ELF: phdr: paddr=0x1c00000 memsz=0x11e000

(XEN) ELF: phdr: paddr=0x1d1e000 memsz=0x19418

(XEN) ELF: phdr: paddr=0x1d38000 memsz=0x223000

(XEN) ELF: memory: 0x1000000 -> 0x1f5b000

(XEN) ELF: note: GUEST_OS = "linux"

(XEN) ELF: note: GUEST_VERSION = "2.6"

(XEN) ELF: note: XEN_VERSION = "xen-3.0"

(XEN) ELF: note: VIRT_BASE = 0xffffffff80000000

(XEN) ELF: note: INIT_P2M = 0x8000000000

(XEN) ELF: note: ENTRY = 0xffffffff81d38180

(XEN) ELF: note: HYPERCALL_PAGE = 0xffffffff81001000

(XEN) ELF: note: FEATURES = "!writable_page_tables|pae_pgdir_above_4gb|writable_descriptor_tables|auto_translated_physmap|supervisor_mode_kernel"


(XEN) ELF: note: PAE_MODE = "yes"

(XEN) ELF: note: LOADER = "generic"

(XEN) ELF: note: unknown (0xd)


(XEN) ELF: note: MOD_START_PFN = 0x1

(XEN) ELF: note: HV_START_LOW = 0xffff800000000000


(XEN) ELF: addresses:

(XEN)     virt_base        = 0xffffffff80000000

(XEN)     elf_paddr_offset = 0x0

(XEN)     virt_offset      = 0xffffffff80000000

(XEN)     virt_kstart      = 0xffffffff81000000

(XEN)     virt_kend        = 0xffffffff81f5b000

(XEN)     virt_entry       = 0xffffffff81d38180

(XEN)     p2m_base         = 0x8000000000

(XEN)  Xen  kernel: 64-bit, lsb, compat32

(XEN)  Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x1f5b000


(XEN)  Dom0 alloc.:   000000042e000000->0000000430000000 (4099048 pages to be allocated)

(XEN)  Init. ramdisk: 000000043ed4d000->000000043ffffa9c


(XEN)  Loaded kernel: ffffffff81000000->ffffffff81f5b000

(XEN)  Init. ramdisk: 0000000000000000->0000000000000000

(XEN)  Phys-Mach map: 0000008000000000->0000008001f5f4d8

(XEN)  Start info:    ffffffff81f5b000->ffffffff81f5b4b4

(XEN)  Page tables:   ffffffff81f5c000->ffffffff81f6f000

(XEN)  Boot stack:    ffffffff81f6f000->ffffffff81f70000

(XEN)  TOTAL:         ffffffff80000000->ffffffff82000000

(XEN)  ENTRY ADDRESS: ffffffff81d38180

(XEN) Dom0 has maximum 8 VCPUs

(XEN) ELF: phdr 0 at 0xffffffff81000000 -> 0xffffffff81aca000

(XEN) ELF: phdr 1 at 0xffffffff81c00000 -> 0xffffffff81d1e000

(XEN) ELF: phdr 2 at 0xffffffff81d1e000 -> 0xffffffff81d37418

(XEN) ELF: phdr 3 at 0xffffffff81d38000 -> 0xffffffff81e82000

(XEN) Initial low memory virq threshold set at 0x4000 pages.

(XEN) Scrubbing Free RAM on 1 nodes using 4 CPUs

(XEN) ..................................done.

(XEN) Std. Loglevel: All

(XEN) Guest Loglevel: All

(XEN) Xen is relinquishing VGA console.

(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen)

(XEN) Freed 456kB init memory

(XEN) PCI add device 0000:00:00.0

(XEN) PCI add device 0000:00:01.0

(XEN) PCI add device 0000:00:16.0

(XEN) PCI add device 0000:00:16.1

(XEN) PCI add device 0000:00:1a.0

(XEN) PCI add device 0000:00:1d.0

(XEN) PCI add device 0000:00:1e.0

(XEN) PCI add device 0000:00:1f.0

(XEN) PCI add device 0000:00:1f.2

(XEN) PCI add device 0000:00:1f.3

(XEN) PCI add device 0000:01:00.0

(XEN) PCI add device 0000:01:00.1

(XEN) PCI add device 0000:02:03.0

(XEN) PCI: Using MCFG for segment 0000 bus 00-ff

(XEN) d0: Forcing read-only access to MFN fed00

(XEN) traps.c:1540: GPF (0000): ffff82d080363383 [emul-priv-op.c#read_msr+0x370/0x45c] -> ffff82d08036d9b2

(XEN) traps.c:1540: GPF (0000): ffff82d080363383 [emul-priv-op.c#read_msr+0x370/0x45c] -> ffff82d08036d9b2

(XEN) traps.c:1540: GPF (0000): ffff82d080363383 [emul-priv-op.c#read_msr+0x370/0x45c] -> ffff82d08036d9b2

(XEN) grant_table.c:1688:d0v3 Expanding d1 grant table from 0 to 1 frames

(XEN) HVM1 restore: CPU 0

(XEN) HVM1 restore: CPU 1

(XEN) HVM1 restore: PIC 0

(XEN) HVM1 restore: PIC 1

(XEN) HVM1 restore: IOAPIC 0

(XEN) HVM1 restore: LAPIC 0

(XEN) HVM1 restore: LAPIC 1

(XEN) HVM1 restore: LAPIC_REGS 0

(XEN) HVM1 restore: LAPIC_REGS 1

(XEN) HVM1 restore: PCI_IRQ 0

(XEN) HVM1 restore: ISA_IRQ 0

(XEN) HVM1 restore: PCI_LINK 0

(XEN) HVM1 restore: PIT 0

(XEN) HVM1 restore: RTC 0

(XEN) HVM1 restore: HPET 0

(XEN) HVM1 restore: PMTIMER 0

(XEN) HVM1 restore: MTRR 0

(XEN) HVM1 restore: MTRR 1

(XEN) HVM1 restore: CPU_XSAVE 0

(XEN) HVM1 restore: CPU_XSAVE 1

(XEN) HVM1 restore: VMCE_VCPU 0

(XEN) HVM1 restore: VMCE_VCPU 1

(XEN) HVM1 restore: TSC_ADJUST 0

(XEN) HVM1 restore: TSC_ADJUST 1

(XEN) grant_table.c:1688:d0v1 Expanding d2 grant table from 0 to 1 frames

(d2) Bootstrapping...

(d2) Xen Minimal OS (pv)!

(d2)   start_info: 0x574000(VA)

(d2)     nr_pages: 0x2000

(d2)   shared_inf: 0x06183000(MA)

(d2)      pt_base: 0x577000(VA)

(d2) nr_pt_frames: 0x7

(d2)     mfn_list: 0x564000(VA)

(d2)    mod_start: 0x0(VA)

(d2)      mod_len: 0

(d2)        flags: 0x0

(d2)     cmd_line:  -d 1

(d2)        stack: 0x523140-0x543140

(d2) MM: Init

(d2)       _text: 0x0(VA)

(d2)      _etext: 0x117ec2(VA)

(d2)    _erodata: 0x14a000(VA)

(d2)      _edata: 0x14ab68(VA)

(d2) stack start: 0x523140(VA)

(d2)        _end: 0x563e78(VA)

(d2)   start_pfn: 57e

(d2)     max_pfn: 2000

(d2) Mapping memory range 0x57e000 - 0x2000000

(d2) setting 0x0-0x14a000 readonly

(d2) skipped 1000

(d2) MM: Initialise page allocator for 58a000(58a000)-2000000(2000000)

(d2)     Adding memory range 58b000-2000000

(d2) MM: done

(d2) Demand map pfns at 100000000000-108000000000.

(d2) Heap resides at 200000000000-208000000000.

(d2) Initialising timer interface

(d2) Initialising console ... done.

(XEN) grant_table.c:1688:d2v0 Expanding d2 grant table from 1 to 4 frames

(d2) gnttab_table mapped at 0x100000000000.

(d2) Initialising scheduler

(d2) Thread "Idle": pointer: 0x0x200000000050, stack: 0x0x5a0000

(d2) Thread "xenstore": pointer: 0x0x200000000800, stack: 0x0x5b0000

(d2) xenbus initialised on irq 1

(d2) Thread "shutdown": pointer: 0x0x200000000fb0, stack: 0x0x5c0000

(d2) main.c: dummy main: par=0x0

(d2) Thread "main": pointer: 0x0x200000001760, stack: 0x0x5d0000

(d2) sparsing 3MB at 181000

(d2) Thread "pcifront": pointer: 0x0x200000003c70, stack: 0x0x5e0000

(d2) pcifront_watches: waiting for backend path to appear device/pci/0/backend

(d2) dom vm is at /vm/9389f006-0389-4aa8-ad4b-61eeea31676b

(d2) ************************ NETFRONT for device/vif/0 **********



(d2) net TX ring size 256

(d2) net RX ring size 256

(d2) backend at /local/domain/0/backend/vif/2/0

(d2) mac is 00:16:3e:05:84:95

(d2) **************************

(d2) tap_open((null)) -> 3

(d2) xs_daemon_open -> 4, 0x14a6c8

(d2) ******************* BLKFRONT for /local/domain/2/device/vbd/51712 **********



(d2) backend at /local/domain/0/backend/vbd/2/51712

(d2) 209715200 sectors of 512 bytes

(d2) **************************

(d2) blk_open(/local/domain/2/device/vbd/51712) -> 5

(d2) xs_watch(device-model/1/logdirty/cmd, logdirty)

(d2) xs_watch(device-model/1/command, dm-command)

(d2) xs_watch(/local/domain/1/cpu, vcpu-set)

(d2) xs_read(/local/domain/0/backend/pci/1/0/msitranslate): ENOENT

(d2) xs_read(/local/domain/0/backend/pci/1/0/power_mgmt): ENOENT

(d2) xs_watch(/local/domain/0/backend/console/1, be:0x139dbc:1:0x164e20)

(d2) xs_directory(/local/domain/0/backend/console/1): EACCES

(d2) xs_watch(/local/domain/0/backend/vkbd/1, be:0x136601:1:0x164dc0)

(d2) xs_directory(/local/domain/0/backend/vkbd/1): EACCES

(d2) xs_read(device-model/1/disable_pf): ENOENT

(d2) xs_watch(/local/domain/1/log-throttling, /local/domain/1/log-throttling)

(d2) ******************* CONSFRONT for device/console/2 **********



(d2) backend at /local/domain/0/backend/console/2/2

(d2) **************************

(d2) fd(7) = open_savefile



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