Date: Wed, 16 Jul 2014 09:36:23 +0100 From: Peter Maydell <peter.maydell@...aro.org> To: Rich Felker <dalias@...c.org> Cc: QEMU Developers <qemu-devel@...gnu.org>, musl@...ts.openwall.com, microblaze-linux@...ts.itee.uq.edu.au, Stefan Kristiansson <stefan.kristiansson@...nalahti.fi> Subject: Re: [Qemu-devel] Bogus struct stat64 for qemu-microblaze (user emulation)? On 16 July 2014 05:02, Rich Felker <dalias@...c.org> wrote: > The qemu-microblaze definition of struct stat64 seems to mismatch the > kernel definition, which is using asm-generic/stat.h. See: > > http://git.qemu.org/?p=qemu.git;a=blob;f=linux-user/syscall_defs.h;h=c9e6323905486452f518102bf40ba73143c9d601;hb=HEAD#l1469 > http://git.qemu.org/?p=qemu.git;a=blob;f=linux-user/syscall.c;h=a50229d0d72fc68966515fcf2bc308b833a3c032;hb=HEAD#l4949 > > This seems to be causing a truncated-to-32-bit inode number to be > stored in the location where st_ino should reside, and a spurious copy > of the inode number to be written in a unused slot at the end of the > structure. Sounds quite plausible -- we've had issues with other archs not having correct stat struct definitions in QEMU. I don't suppose anybody's done much testing of the microblaze linux-user code. > Is my analysis correct? Stefan Kristiansson and I found this while > working on the or1k port of musl libc, where it seems our structure > for the existing microblaze port is wrongly aligned with the qemu > definition rather than the definition the real kernel is using. Before > I try correcting this on our side, I want to make sure we're working > with the right version. I would definitely trust the kernel definition, not QEMU's! thanks -- PMM
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