From: "H. Peter Anvin" <hpa@zytor.com>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Jan Engelhardt <jengelh@computergmbh.de>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
andi@firstfloor.org, akpm@linux-foundation.org
Subject: Re: [x86 setup 16/33] String-handling functions for the new x86 setup code.
Date: Tue, 10 Jul 2007 13:44:47 -0700 [thread overview]
Message-ID: <4693EFBF.4070605@zytor.com> (raw)
In-Reply-To: <298A54C9-B331-4AB9-98B3-5C815B04381E@kernel.crashing.org>
Segher Boessenkool wrote:
>> Nope. The builtins not only vary between gcc versions, but they also
>> have a nasty tendency to generate calls to library functions, sometimes
>> libgcc functions. Hence -ffreestanding.
>
> -ffreestanding will still generate calls to libgcc functions.
> -ffreestanding doesn't disable _all_ of the C library, either.
>
No, it doesn't, but it does inhibit builtin functions, and so provides a
bit more ABI stability.
-hpa
next prev parent reply other threads:[~2007-07-10 20:48 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-10 2:51 x86 setup code rewrite in C H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 01/33] x86 setup: MAINTAINERS: formally take responsibility for the i386 boot code H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 02/33] hd.c: remove BIOS/CMOS queries H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 03/33] include/asm-i386/boot.h: This is <asm/boot.h>, not <linux/boot.h> H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 04/33] Unify the CPU features vectors between i386 and x86-64 H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 05/33] Change CONFIG_X86_MINIMUM_CPU_MODEL to CONFIG_X86_MINIMUM_CPU_FAMILY H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 06/33] Clean up struct screen_info (<linux/screen_info.h>) H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 07/33] Use a new CPU feature word to cover all Intel features that are spread around H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 08/33] Define zero-page offset 0x1e4 as a scratch field, and use it H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 09/33] Make definitions for struct e820entry and struct e820map consistent H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 11:48 ` Andi Kleen
2007-07-10 2:51 ` [x86 setup 10/33] Make struct boot_params a real structure, and remove obsolete fields H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 11/33] x86-64: add CONFIG_PHYSICAL_ALIGN for consistency with i386 H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 12/33] x86-64: add symbolic constants for the boot segment selectors H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 13/33] Header file to produce 16-bit code with gcc H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 14:16 ` Segher Boessenkool
2007-07-10 15:21 ` Andi Kleen
2007-07-10 15:48 ` H. Peter Anvin
2007-07-10 15:53 ` H. Peter Anvin
2007-07-10 20:08 ` Segher Boessenkool
2007-07-10 20:43 ` H. Peter Anvin
2007-07-10 21:08 ` Pawel Dziepak
2007-07-10 21:20 ` H. Peter Anvin
2007-07-11 0:26 ` Brian Gerst
2007-07-10 19:57 ` Segher Boessenkool
2007-07-10 20:42 ` H. Peter Anvin
2007-07-10 21:10 ` Segher Boessenkool
2007-07-10 21:40 ` H. Peter Anvin
2007-07-10 22:06 ` Segher Boessenkool
2007-07-10 21:43 ` Adrian Bunk
2007-07-10 21:46 ` H. Peter Anvin
2007-07-11 0:30 ` Brian Gerst
2007-07-10 2:51 ` [x86 setup 14/33] Top header file for new x86 setup code H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 15/33] Simple bitops for the " H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 16/33] String-handling functions " H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 18:25 ` Jan Engelhardt
2007-07-10 18:35 ` H. Peter Anvin
2007-07-10 20:10 ` Segher Boessenkool
2007-07-10 20:44 ` H. Peter Anvin [this message]
2007-07-10 21:14 ` Segher Boessenkool
2007-07-11 12:46 ` Andi Kleen
2007-07-10 2:51 ` [x86 setup 17/33] A20 handling code H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 18:27 ` Jan Engelhardt
2007-07-10 18:33 ` H. Peter Anvin
2007-07-10 18:36 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 18/33] APM probing code H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 19/33] Command-line parsing code for the new x86 setup code H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 2:51 ` [x86 setup 20/33] Console-writing " H. Peter Anvin
2007-07-10 2:51 ` H. Peter Anvin
2007-07-10 18:35 ` Jan Engelhardt
2007-07-10 18:48 ` H. Peter Anvin
2007-07-10 2:52 ` [x86 setup 21/33] Version string " H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 2:52 ` [x86 setup 22/33] CPU features verification " H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 7:37 ` Sébastien Dugué
2007-07-10 7:37 ` Sébastien Dugué
2007-07-10 2:52 ` [x86 setup 23/33] EDD probing code " H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 2:52 ` [x86 setup 24/33] MCA support for " H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 2:52 ` [x86 setup 25/33] Memory probing support for the " H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 2:52 ` [x86 setup 26/33] Voyager " H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 2:52 ` [x86 setup 27/33] Video mode probing " H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 2:52 ` [x86 setup 28/33] Code for actual protected-mode entry H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 2:52 ` [x86 setup 29/33] Assembly header and main routine for new x86 setup code H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 2:52 ` [x86 setup 30/33] Linker script for the " H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 2:52 ` [x86 setup 31/33] Use the new x86 setup code for i386 H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 7:55 ` Tilman Schmidt
2007-07-10 2:52 ` [x86 setup 32/33] Use the new x86 setup code for x86-64; unify with i386 H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 2:52 ` [x86 setup 33/33] Remove old i386 setup code H. Peter Anvin
2007-07-10 2:52 ` H. Peter Anvin
2007-07-10 4:24 ` x86 setup code rewrite in C Yinghai Lu
2007-07-10 4:39 ` H. Peter Anvin
2007-07-10 5:25 ` Jeff Garzik
2007-07-10 16:24 ` Jeremy Fitzhardinge
-- strict thread matches above, loose matches on Subject: below --
2007-07-11 19:18 x86 setup code rewrite in C - revised H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 01/33] x86 setup: MAINTAINERS: formally take responsibility for the i386 boot code H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 02/33] hd.c: remove BIOS/CMOS queries H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 03/33] include/asm-i386/boot.h: This is <asm/boot.h>, not <linux/boot.h> H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 04/33] Unify the CPU features vectors between i386 and x86-64 H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 05/33] Change CONFIG_X86_MINIMUM_CPU_MODEL to CONFIG_X86_MINIMUM_CPU_FAMILY H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 06/33] Clean up struct screen_info (<linux/screen_info.h>) H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 07/33] Use a new CPU feature word to cover all Intel features that are spread around H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 08/33] Define zero-page offset 0x1e4 as a scratch field, and use it H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 09/33] Make definitions for struct e820entry and struct e820map consistent H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 10/33] Make struct boot_params a real structure, and remove obsolete fields H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 11/33] x86-64: add CONFIG_PHYSICAL_ALIGN for consistency with i386 H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 12/33] x86-64: add symbolic constants for the boot segment selectors H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 13/33] Header file to produce 16-bit code with gcc H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 14/33] Top header file for new x86 setup code H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 15/33] Simple bitops for the " H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 01/33] x86 setup: MAINTAINERS: formally take responsibility for the i386 boot code H. Peter Anvin
2007-07-11 19:18 ` [x86 setup 16/33] String-handling functions for the new x86 setup code H. Peter Anvin
2007-07-11 19:18 ` H. Peter Anvin
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