* GAS Relocation and Relaxation of 24-bit Address
@ 2007-12-12 18:11 Mark P Anderson
2007-12-12 18:20 ` DJ Delorie
0 siblings, 1 reply; 3+ messages in thread
From: Mark P Anderson @ 2007-12-12 18:11 UTC (permalink / raw)
To: binutils
I'm working on a gas port for a machine that has variable length
instructions that are multiples of 1 byte (8-bits). The address,
both PC relative and absolute, can be 8-bits, 16-bits or 24-bits
in length that reside in bytes past the opcode bytes.
From looking at the bfd.c code it seems like addresses have to
be either 16-bits or 32-bits when reading or writing to the bfd.
Am I reading the code right? Am I going to have a big problem
trying to read and write 24-bit addresses? Am I going to have
problems with variable length, byte-oriented instruction encoding?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: GAS Relocation and Relaxation of 24-bit Address
2007-12-12 18:11 GAS Relocation and Relaxation of 24-bit Address Mark P Anderson
@ 2007-12-12 18:20 ` DJ Delorie
2007-12-12 20:00 ` Mark P Anderson
0 siblings, 1 reply; 3+ messages in thread
From: DJ Delorie @ 2007-12-12 18:20 UTC (permalink / raw)
To: Mark P Anderson; +Cc: binutils
The m32c port has 24 bit addresses, and supports both gas and ld
relaxation. See if that offers enough hints for your port.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: GAS Relocation and Relaxation of 24-bit Address
2007-12-12 18:20 ` DJ Delorie
@ 2007-12-12 20:00 ` Mark P Anderson
0 siblings, 0 replies; 3+ messages in thread
From: Mark P Anderson @ 2007-12-12 20:00 UTC (permalink / raw)
To: DJ Delorie; +Cc: binutils, dj
Actually, I was able to find CGEN documentation and the cpu/m32c-* files.
Thanks.
dj@redhat.com wrote on 12/12/2007 01:20:17 PM:
>
> The m32c port has 24 bit addresses, and supports both gas and ld
> relaxation. See if that offers enough hints for your port.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2007-12-12 18:11 GAS Relocation and Relaxation of 24-bit Address Mark P Anderson
2007-12-12 18:20 ` DJ Delorie
2007-12-12 20:00 ` Mark P Anderson
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