linux-kernel - Re: some question about aarch32 for ARM64

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Message-ID: <5506AA06.5070204@jonmasters.org>
Date:	Mon, 16 Mar 2015 06:01:42 -0400
From:	Jon Masters <jonathan@...masters.org>
To:	loody <miloody@...il.com>,
	Catalin Marinas <catalin.marinas@....com>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: some question about aarch32 for ARM64

On 2/24/15, 12:19 AM, loody wrote:

>>> PS:Below is my compile error message:
>>> #aarch64-linux-gnu-gcc -mabi=ilp32 test.c
>>
>> -mabi=ilp32 is entirely different from an AArch32 compiler. The above
>> still generates AArch64 but with the ILP32 ABI (sizeof int/long/pointer
>> is 32-bit).
> so per your explanation, AArch32 binary could be created by any
> arm-linux-gnu-gcc which support armv7 and previous instructions.
> And -mabi=ilp32 is still aarch64 but with ILP32 ABI.
> appreciate your kind help ^^

This is the correct summary.

Jon.

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