linux-kernel - Re: [PATCH] tools/nolibc: add support for Alpha

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Message-ID: <ceef9e43-5591-4c03-ba51-af1ccc68a05b@linaro.org>
Date: Sun, 13 Jul 2025 16:21:58 -0600
From: Richard Henderson <richard.henderson@...aro.org>
To: Thomas Weißschuh <linux@...ssschuh.net>,
 Willy Tarreau <w@....eu>, Shuah Khan <shuah@...nel.org>,
 Matt Turner <mattst88@...il.com>
Cc: linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
 linux-alpha@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
 John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Subject: Re: [PATCH] tools/nolibc: add support for Alpha

On 7/13/25 14:08, Thomas Weißschuh wrote:
> +++ b/tools/testing/selftests/nolibc/nolibc-test.c
> @@ -709,6 +709,10 @@ int run_startup(int min, int max)
>   	/* checking NULL for argv/argv0, environ and _auxv is not enough, let's compare with sbrk(0) or &end */
>   	extern char end;
>   	char *brk = sbrk(0) != (void *)-1 ? sbrk(0) : &end;
> +#if defined(__alpha__)
> +	/* the ordering above does not work on an alpha kernel */
> +	brk = NULL;
> +#endif

The syscall api is different for brk on alpha.
A change to sys_brk or brk in include/nolibc/sys.h is required.


r~