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Date: Sun, 21 Apr 2024 22:13:28 +0300
Message-Id: <86le567cmf.fsf@gnu.org>
From: "Eli Zaretskii (eliz AT gnu DOT org) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
To: Pali <pali AT pali DOT im>
Cc: djgpp AT delorie DOT com
In-Reply-To: <20240421102444.zjl5mmuhqbmuknhn@pali> (message from Pali on Sun,
	21 Apr 2024 12:24:44 +0200)
Subject: Re: Error handling in __djgpp_map_physical_memory()
References: <20240421102444 DOT zjl5mmuhqbmuknhn AT pali>
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> Date: Sun, 21 Apr 2024 12:24:44 +0200
> From: Pali <pali AT pali DOT im>
> Cc: djgpp AT delorie DOT com
> 
> Hello, I have there a change for __djgpp_map_physical_memory function,
> it is improving setting errno in the same way as was done already for
> the function __djgpp_set_page_attributes.

Thanks, I have a couple of minor comments below.

> +      /* Base address of the memory handle must be page aligned too. */
> +      if (d->address & 0xfff)
> +        {
> +          errno = EFAULT;

I think this should be EINVAL.  An unaligned address is not really
"bad address", it's just that it's not valid for this function.

> +              case 0x8023: /* Invalid handle (in ESI) */
> +              case 0x8025: /* Invalid linear address (specified range is not within specified block or EBX/EDX is not page-aligned) */
> +                errno = EFAULT;

These two should also be EINVAL, IMO.