[coreboot] Disassembly of coreboot binaries

[Chauhan, Himanshu]

Hi,

I am working on a hypvervisor and am using coreboot + FILO as guest BIOS.
While things were fine a while back, it has stopped working. I see that my
hypervisor can't handle address 0xFFFFFC while coreboot's RIP is at
0xfff81e41.

The exact register dump of guest is as follow:

[guest0/uart0] (__handle_vm_exception:558) ERROR: No region mapped to guest
physical: 0xfffffc

GUEST guest0/vcpu0 dump state:

RAX: 0x9fe80 RBX: 0xfffff8 RCX: 0x1b RDX: 0x53a11439
R08: 0x0 R09: 0x0 R10: 0x0 R11: 0x0
R12: 0x0 R13: 0x0 R14: 0x0 R15: 0x0
RSP: 0x9fe54 RBP: 0xa0000 RDI: 0xfff801e4 RSI: 0x9fe80
RIP: 0xfff81e41

CR0: 0xe0000011 CR2: 0x0 CR3: 0xa23000 CR4: 0x0
CS    : Sel: 0x00000008 Limit: 0xffffffff Base: 0x00000000 (G:  1 DB:  1
L:  0 AVL:  0 P:  1 DPL:  0 S:  1 Type: 11)
DS    : Sel: 0x00000010 Limit: 0xffffffff Base: 0x00000000 (G:  1 DB:  1
L:  0 AVL:  0 P:  1 DPL:  0 S:  1 Type:  3)
ES    : Sel: 0x00000010 Limit: 0xffffffff Base: 0x00000000 (G:  1 DB:  1
L:  0 AVL:  0 P:  1 DPL:  0 S:  1 Type:  3)
SS    : Sel: 0x00000010 Limit: 0xffffffff Base: 0x00000000 (G:  1 DB:  1
L:  0 AVL:  0 P:  1 DPL:  0 S:  1 Type:  3)
FS    : Sel: 0x00000010 Limit: 0xffffffff Base: 0x00000000 (G:  1 DB:  1
L:  0 AVL:  0 P:  1 DPL:  0 S:  1 Type:  3)
GS    : Sel: 0x00000010 Limit: 0xffffffff Base: 0x00000000 (G:  1 DB:  1
L:  0 AVL:  0 P:  1 DPL:  0 S:  1 Type:  3)
GDT   : Sel: 0x00000000 Limit: 0x0000001f Base: 0xfff80200 (G:  0 DB:  0
L:  0 AVL:  0 P:  0 DPL:  0 S:  0 Type:  0)
LDT   : Sel: 0x00000000 Limit: 0x0000ffff Base: 0x00000000 (G:  0 DB:  0
L:  0 AVL:  0 P:  0 DPL:  0 S:  0 Type:  0)
IDT   : Sel: 0x00000000 Limit: 0x00000000 Base: 0x00000000 (G:  0 DB:  0
L:  0 AVL:  0 P:  0 DPL:  0 S:  0 Type:  0)
TR    : Sel: 0x00000000 Limit: 0x0000ffff Base: 0x00000000 (G:  1 DB:  0
L:  1 AVL:  1 P:  0 DPL:  0 S:  0 Type:  0)
RFLAGS: 0xa    [ ]

I want to know which binary file (.o) should I disassemble to look at the
RIP?

I was looking at
objdump -D  -mi386 -Maddr16,data16 generated/ramstage.o

but this is prior to linking and thus only has offsets.

-- 

Regards
[Himanshu Chauhan]
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