Re: Warnings in kern/dl.c

[Bean]

Hi,

I have another thought about this issue, it's actually caused by
different working environment for the same file. For kern/dl.c, there
are three modes:

1. Target mode
When it's used in boot environment, it's in target mode, for example, i386.

2. Host mode
When it's used in tools like grub-emu, it's in host mode, for example, x86_64.

3. Cross mode
When it's used in grub-mkimage, it's in cross mode. It runs in x86_64,
but produce image that will be used in i386.

For these three modes, we have only one controlling macro, GRUB_UTIL,
so it can't cover all cases. To solve this, we can either:

a. Add new macro, for example GRUB_CROSS or GRUB_MKIMAGE.

or

b. Drop one of the usage.

But actually, host mode is not useful, we can't load external modules
in grub-emu, so support 1 and 3 is enough.

BTW, kern/dl.c has issue as well. For example, grub_dl_resolve_symbol
returns void*. It should be Elf_Addr, so that it can expand to the
correct type according to GRUB_TARGET_SIZEOF_VOID_P.

-- 
Bean