[linuxsh-shmedia-dev] Use of e_flags field in ELF header

[Thomas,Stephen <ste...@su...>]

Apparently, the e_flags field of the ELF Header structure in ELF files =
is used by SH architectures to indicate the CPU type. The lower 5 bits =
have the following meaning:

     0  =3D unknown CPU type
     1  =3D SH1
     2  =3D SH2
     3  =3D SH3
     5  =3D SH3 with DSP
     8  =3D SH3E
     9  =3D SH4
    10  =3D SH5

The e_flags field is designed to hold architecture specific info, but =
other architectures don't appear to use it in quite the same way, i.e. =
to indicate different CPU types.

Does anybody know why SH uses e_flags in this way?

The problem I have is in generating & interpreting core files. When the =
kernel (V2.4)generates an ELF core dump, it just sets e_flags to 0 (hard =
coded constant) & dumps it. So to get it to generate a valid SH5 core =
dump, I need to modify generic code. There are similar problems with the =
gdb 'gcore' command.

Steve Thomas
SuperH (UK) Ltd