<html><head><title>Re: [coreboot] Disassembly of coreboot binaries</title>
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<span style=" font-family:'Courier New'; font-size: 9pt;">Hello Himanshu,<br>
<br>
Wednesday, December 14, 2016, 10:11:57 AM, you wrote:<br>
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<td width=861><span style=" font-family:'courier new'; font-size: 9pt;">Hi,<br>
<br>
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.<br>
<br>
The exact register dump of guest is as follow:<br>
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[guest0/uart0] (__handle_vm_exception:558) ERROR: No region mapped to guest physical: 0xfffffc<br>
<br>
GUEST guest0/vcpu0 dump state:<br>
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RAX: 0x9fe80 RBX: 0xfffff8 RCX: 0x1b RDX: 0x53a11439<br>
R08: 0x0 R09: 0x0 R10: 0x0 R11: 0x0<br>
R12: 0x0 R13: 0x0 R14: 0x0 R15: 0x0<br>
RSP: 0x9fe54 RBP: 0xa0000 RDI: 0xfff801e4 RSI: 0x9fe80<br>
RIP: 0xfff81e41<br>
<br>
CR0: 0xe0000011 CR2: 0x0 CR3: 0xa23000 CR4: 0x0<br>
CS : Sel: 0x00000008 Limit: 0xffffffff Base: 0x00000000 (G: 1 DB: 1 L: 0 AVL: 0 P: 1 DPL: 0 S: 1 Type: 11)<br>
DS : Sel: 0x00000010 Limit: 0xffffffff Base: 0x00000000 (G: 1 DB: 1 L: 0 AVL: 0 P: 1 DPL: 0 S: 1 Type: 3)<br>
ES : Sel: 0x00000010 Limit: 0xffffffff Base: 0x00000000 (G: 1 DB: 1 L: 0 AVL: 0 P: 1 DPL: 0 S: 1 Type: 3)<br>
SS : Sel: 0x00000010 Limit: 0xffffffff Base: 0x00000000 (G: 1 DB: 1 L: 0 AVL: 0 P: 1 DPL: 0 S: 1 Type: 3)<br>
FS : Sel: 0x00000010 Limit: 0xffffffff Base: 0x00000000 (G: 1 DB: 1 L: 0 AVL: 0 P: 1 DPL: 0 S: 1 Type: 3)<br>
GS : Sel: 0x00000010 Limit: 0xffffffff Base: 0x00000000 (G: 1 DB: 1 L: 0 AVL: 0 P: 1 DPL: 0 S: 1 Type: 3)<br>
GDT : Sel: 0x00000000 Limit: 0x0000001f Base: 0xfff80200 (G: 0 DB: 0 L: 0 AVL: 0 P: 0 DPL: 0 S: 0 Type: 0)<br>
LDT : Sel: 0x00000000 Limit: 0x0000ffff Base: 0x00000000 (G: 0 DB: 0 L: 0 AVL: 0 P: 0 DPL: 0 S: 0 Type: 0)<br>
IDT : Sel: 0x00000000 Limit: 0x00000000 Base: 0x00000000 (G: 0 DB: 0 L: 0 AVL: 0 P: 0 DPL: 0 S: 0 Type: 0)<br>
TR : Sel: 0x00000000 Limit: 0x0000ffff Base: 0x00000000 (G: 1 DB: 0 L: 1 AVL: 1 P: 0 DPL: 0 S: 0 Type: 0)<br>
RFLAGS: 0xa [ ]<br>
<br>
I want to know which binary file (.o) should I disassemble to look at the RIP?<br>
<br>
I was looking at <br>
objdump -D -mi386 -Maddr16,data16 generated/ramstage.o<br>
<br>
but this is prior to linking and thus only has offsets.<br>
<br>
-- <br>
<br>
Regards<br>
[Himanshu Chauhan]<br>
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<span style=" font-family:'Courier New'; font-size: 9pt;">Check the CBFS map at the end of build and the .elf files (not .o) in the build directory.<br>
<br>
<span style=" font-family:'arial'; font-size: 8pt; color: #c0c0c0;"><i>-- <br>
WBR,<br>
Igor <a style=" font-style: normal;" href="mailto:skochinsky@mail.ru">mailto:skochinsky@mail.ru</a></body>