[libre-riscv-dev] [Bug 186] Create decoder for SOC: Power ISA and RISC-V

[bugzilla-daemon at libre-riscv.org]

http://bugs.libre-riscv.org/show_bug.cgi?id=186

--- Comment #111 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
deep breath....

install dependencies (saves messing about) with
apt-get build-dep qemu

git clone from here:

[remote "origin"]
    url = https://github.com/legoater/qemu.git
    fetch = +refs/heads/*:refs/remotes/origin/*

git checkout this branch:
* origin/powernv-next

configure/build with this:
./configure --enable-system
--target-list=ppc64-softmmu,ppc64-linux-user,ppc64le-linux-user

edit hw/ppc/pnv.c and comment out these lines:

        /*
    if (qemu_uuid_set) {
        _FDT((fdt_property_string(fdt, "system-id", buf)));
    }
    */

run python3 domstart.py (files to be attached shortly)

dump the state to a file:

virsh # dump Linux-0.2 mem.hex --memory-only --crash


objdump the results with this:

objdump -x mem.hex

which gives the following (including regfile and memory):

architecture: powerpc:common64, flags 0x00000000:

start address 0x0000000000000000

Program Header:
    NOTE off    0x00000000000000b0 vaddr 0x0000000000000000 paddr
0x0000000000000000 align 2**0
         filesz 0x0000000000000710 memsz 0x0000000000000710 flags ---
    LOAD off    0x00000000000007c0 vaddr 0x0000000000000000 paddr
0x0000000000000000 align 2**0
         filesz 0x0000000040000000 memsz 0x0000000040000000 flags ---

Sections:
Idx Name          Size      VMA               LMA               File off  Algn
  0 note0         00000710  0000000000000000  0000000000000000  000000b0  2**0
                  CONTENTS, READONLY
  1 .reg/0        00000180  0000000000000000  0000000000000000  00000134  2**2
                  CONTENTS
  2 .reg          00000180  0000000000000000  0000000000000000  00000134  2**2
                  CONTENTS
  3 .reg2/0       00000108  0000000000000000  0000000000000000  000002d0  2**2
                  CONTENTS
  4 .reg2         00000108  0000000000000000  0000000000000000  000002d0  2**2
                  CONTENTS
  5 load1         40000000  0000000000000000  0000000000000000  000007c0  2**0
                  CONTENTS, ALLOC, LOAD, READONLY

and thus can be parsed with python elf libraries mentioned in previous
comments.

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