Date: Sat, 02 Mar 2013 11:05:23 -0700 From: Ian Lepore <ian@FreeBSD.org> To: Ronald Klop <ronald-freebsd8@klop.yi.org> Cc: freebsd-arm@FreeBSD.org Subject: Re: ARM EABI test image Message-ID: <1362247523.1195.183.camel@revolution.hippie.lan> In-Reply-To: <op.wtbyyldw8527sy@pinky> References: <20130302172556.5b59e122@bender> <op.wtbw52qc8527sy@pinky> <1362246830.1195.181.camel@revolution.hippie.lan> <op.wtbyyldw8527sy@pinky>
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On Sat, 2013-03-02 at 19:00 +0100, Ronald Klop wrote: > On Sat, 02 Mar 2013 18:53:50 +0100, Ian Lepore <ian@freebsd.org> wrote: > > > On Sat, 2013-03-02 at 18:21 +0100, Ronald Klop wrote: > >> On Sat, 02 Mar 2013 05:25:56 +0100, Andrew Turner <andrew@fubar.geek.nz> > >> wrote: > >> > >> > Hello, > >> > > >> > I have built an updated ARM EABI test image for Raspberry Pi [1]. > >> > > >> > The only known issue is c++ exception handling is broken when > >> > using in a dynamically linked executable. Static executables should > >> > work with c++ exceptions. > >> > > >> > To test it you will have to extract it using unxz and dd it to an sd > >> > card, for example, with a USB to SD adapter on /dev/da0: > >> > $ unxz bsd-pi-eabi-r247609.img.xz > >> > $ dd if=bsd-pi-eabi-r247609.img of=/dev/da0 > >> > > >> > If you don't have a Raspberry Pi but would like to try it on your > >> board > >> > you can add -DWITH_ARM_EABI to the make commands you use to build and > >> > install world and the kernel. > >> > >> Is this also interesing on the older SHEEVAPLUG? > >> If yes, I can test it somewhere next week. > >> > >> Ronald. > > > > As I understand it, the plan is that eventually everything is EABI, > > including the older armv4/5 stuff, so that needs testing too. > > > > You know what I haven't stumbled across yet is a simple explanation of > > why EABI is better then OABI. I tried to search for some info the other > > day, but there are so many noise hits on the search I didn't find a > > simple synopsis of differences or advantages. > > Googling on 'eabi vs oabi' gives me this > http://wiki.embeddedarm.com/wiki/EABI_vs_OABI. I saw that, but that's a linux-specific answer to a linux-specific problem that freebsd never had: we use OABI without assuming hardware fp and emulating it in the kernel via traps. I hope there's more advantage to EABI than just that, since that part of it gets us nothing. -- Ian
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