ah, yeah, i missed it because it's not in the syscall itself --- it's in macros that the syscall references:
#ifdef COMPAT_UTS_MACHINE #define override_architecture(name) \ >-(personality(current->personality) == PER_LINUX32 && \ >- copy_to_user(name->machine, COMPAT_UTS_MACHINE, \ >->- sizeof(COMPAT_UTS_MACHINE))) #else #define override_architecture(name)>0 #endif On Fri, Oct 1, 2021 at 10:24 AM Rob Landley <r...@landley.net> wrote: > On 9/30/21 8:48 PM, enh wrote: > > > On Tue, Sep 28, 2021, 18:04 Rob Landley <r...@landley.net > > > That said, according to the man page literally all linux32 does is tell > > > uname to lie. It has no actual effect on the rest of the ABI. (There > are > > > setarch options that do, but I didn't implement setarch...) > > > > Not uname, afaik: it tells the arm64 kernel to lie when you look at > > /proc/cpuinfo > > though... https://elixir.bootlin.com/linux/latest/A/ident/PER_LINUX32 > > <https://elixir.bootlin.com/linux/latest/A/ident/PER_LINUX32> > > It changes what's returned by the uname() system call. (The uname command > is 90% > just passing along data from uname(2).) > > Rob >
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