[OpenPower-Firmware] SBE questions

[Dean Sanner]

Hi Marty,

> Ok, and one more thing (probably not, but I've managed to get a proper
> full seeprom dumped and un-ecc'd): does ppe42-binutils currently have

I take it that I don't need to go into iicmaster details?  (It is an
IBM service processor specific IBM tool -- I was just trying show how
to suck the images off the PROM and reconstruct)

> the guts to disassemble flat binary (not elf) targets. There's a -M ppe42
> switch but no -m switch equivalent (you apparently need a -M -m and -b
binary
> flag to dissassemble flat binaries), and I can't seem to get
> powerpc-eabi-objdump
> to make disassembling sbe_seeprom_DD2.bin look like sbe_seeprom_DD2.dis
> (this is mostly just a run against a known set of binaries and
> disassembly to verify against; both were produced from
sbe_seeprom_DD2.out,
> an elf file, or at least I assume so).

Once you have the image off and ECC removed -- you can then use the
p9_xip_tool
to extract various sections.  This is the output of "report"

output/build/hcode-hw071319a.940/output/bin/p9_xip_tool.exe
output/host/powerpc64le-buildroot-linux-gnu/sysroot/openpower_pnor_scratch/p9n_23.sbe_seeprom.bin
 report

Image section type : 0x00 "XIP image"
Magic number       : 0x584950205345504d "XIP SEPM"
Header version     : 0x09
Link Address       : 0x00000000ff800000
L1 Loader Address  : 0xff800244
L2 Loader Address  : 0xffffe400
Kernel Address     : 0xfffe8998
Image size         : 0x00031c58 (203864)
Normalized         : Yes
TOC Sorted         : Yes
Build Date         : 07/22/2019
Build Time         : 10:33
Build User         : dsanner
Build Host         : gfwr609.rchland.ibm.com
Build Tag          : 07595bbf345cb9a1b

Section Table      :

    Name            Align   DD   Start        End          Size

   .header          1       0    0x00000000   0x0000015b   0x0000015c (348)
   .fixed           8       0    0x00000400   0x00000547   0x00000148 (328)
   .fixedtoc        8       0    0x0001e930   0x0001ebb7   0x00000288 (648)
   .toc             4       0    0x0001ebb8   0x0001f02b   0x00000474
(1140)
   .strings         1       0    0x0001f02c   0x0001f81c   0x000007f1
(2033)
   .loader_text     4       0    0x00000200   0x0000039b   0x0000019c (412)
   .pibrepr_data    8       0    0x00000000                0x00000000 (0)
   .text            4       0    0x00000548   0x0001e92f   0x0001e3e8
(123880)
   .data            8       0    0x00000000                0x00000000 (0)
   .base            4       0    0x0001fb30   0x0002fee2   0x000103b3
(66483)
   .baseloader      8       0    0x0001f820   0x0001fb2f   0x00000310 (784)
   .overrides       8       0    0x00000000                0x00000000 (0)
   .rings           8       0    0x0002fee8   0x00031c53   0x00001d6c
(7532)
   .overlays        8       0    0x00000000                0x00000000 (0)
   .hbbl            8       0    0x00000000                0x00000000 (0)


to extract the actual "code" you want to suck off the .text portion and
then examine:

p9_xip_tool.exe p9n_23.sbe_seeprom.bin extract .text sbe.code.bin

If you want to add/remove sections you can do it like this:

p9_xip_tool.exe p9n_10.sbe_seeprom.bin delete .hbbl
p9_xip_tool.exe p9n_10.sbe_seeprom.bin append .hbbl ../hbbl_test.bin

Hope that helps accomplish what you want

Dean Sanner
dsanner at us.ibm.com
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