[fpc-pascal] Best start point for adding new FPC target
jura at cp-lab.com
Tue Jan 28 20:40:46 CET 2020
On 28.01.2020 21:14, Fabio Luis Girardi via fpc-pascal wrote:
> Em ter., 28 de jan. de 2020 às 16:04, Yuriy Sydorov <jura at cp-lab.com <mailto:jura at cp-lab.com>> escreveu:
> You need to add support of a new CPU to the existing freebsd target. The target would be arm-freebsd, since armhf is
> treated as a separate CPU by FPC. You need to create arm startup files in the rtl/freebsd/arm folder.
> Yes, I know. But to add this new CPU support for the FPC/FreeBSD, it is better I start with files of rtl/freebsd/i386 or
> rtl/freebsd/x86_64 or use another start point, like rtl/netbsd/arm ?
The primary goal of a startup code is to get pointers to the command line parameters and the environment block. If
arm-freebsd uses the stack to pass these pointers (the same way as i386-freebsd), then you need just to convert the i386
startup assembly to the arm assembly.
For start you need only the prt0.as file.
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