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Re: [Qemu-ppc] [RFC PATCH v4 5/5] target/ppc: support single stepping wi

From: Fabiano Rosas
Subject: Re: [Qemu-ppc] [RFC PATCH v4 5/5] target/ppc: support single stepping with KVM HV
Date: Tue, 19 Mar 2019 11:32:26 -0300

Alexey Kardashevskiy <address@hidden> writes:

> Looks good to me, does not break what already works. However I cannot
> debug SLOF real mode and I am not sure why.
> (gdb) set endian big
> The target is assumed to be big endian
> (gdb) b *0x3f00
> Breakpoint 2 at 0x3f00

I think I'm missing the point here. Why 0x3f00?

(qemu) info roms
addr=0000000000000000 size=0x0e22b8 mem=ram name="...qemu/slof.bin"             
addr=0000000000400000 size=0x17976d0 mem=ram name="...vmlinux"

$ objdump -d board-qemu/llfw/stage1.elf | grep "_start>"
0000000000000100 <__start>:
     100:       48 00 3f 00     b       4000 <_start>
0000000000004000 <_start>:

Thread 1 hit Breakpoint 3, _start () at startup.S:82
(gdb) p/x $pc
$1 = 0x4000
(gdb) si
(gdb) p/x $pc
$3 = 0x4004
(gdb) c
Thread 1 hit Breakpoint 4, early_c_entry (start_addr=49056, fdt_addr=49024) at 
(gdb) p/x $pc
$4 = 0x4d18

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